JP3384498B2 - Method of eliminating processing delay in engine ignition control - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to an ignition timer set.
In engine ignition control to eliminate the effects of processing delays
And a method for eliminating a processing delay. [0002] 2. Description of the Related Art In recent years, microcontrollers have been used in vehicles such as automobiles.
Computer, engine, powertrain, etc.
It became possible to control with high accuracy. This microco
The computer is an electronic device with a constant voltage circuit and various peripheral circuits.
Installed in the vehicle as a control unit (ECU), driving the vehicle
Based on signals from various sensors that detect the status,
It performs gin fuel injection control and ignition control. [0003] The ignition control by the ECU is usually performed at a predetermined level.
This is executed by an interrupt process for each crank angle.
Japanese Patent Application Laid-Open No. 2-159747 discloses an interrupt at every predetermined crank angle.
The intake air flow rate and engine speed
The basic ignition timing is calculated from the interpolation calculation of the map based on
The basic ignition timing of the engine due to knocking, cooling water temperature, etc.
Calculated final ignition timing (angle) with angle correction
Then, convert this final ignition timing (angle) to time
Ignition timing control of energization end time and energization start time of fire coil
The technology for setting the counter (timer) is disclosed.
You. [0004] SUMMARY OF THE INVENTION However, certain
Data is stored in the ignition timer after the crank angle interrupt is activated.
There is a processing delay before is set.
The actual ignition timing will be shifted by the delay time.
Engine output performance cannot be fully demonstrated.
Not only worsening, but also deteriorating exhaust emissions.
There is it. The present invention has been made in view of the above circumstances.
In order to eliminate the effect of processing delay when setting the ignition timer,
An engine that can always ignite at the optimal timing
To provide a method for eliminating processing delay in ignition control of gin.
And for the purpose. [0006] [Means for Solving the Problems]The invention according to claim 1 is
A crank pulse representing a plurality of specified crank positions
Enter a specific crank out of multiple crank pulses
Input a predetermined number of cam pulses for cylinder discrimination between pulses.
Based on the input pattern of these pulses
The cylinder position is determined and the cylinder
Section is set for each input of the engine, and the start position of the section related to ignition
To the ignition timer by setting the time from
・ Ignition control of an engine that shuts off and performs ignition control
Process for each crank pulse input synchronized with the engine speed.
The section representing the current cylinder and crank position is
It is determined whether or not the section related to the set ignition has come
When the section pertains to
From the set ignition coil energization / interruption time,
From the input of the pulse until the ignition timer is actually set.
Set the value obtained by subtracting the delay time in the ignition timer,
Perform ignition and check whether the ignition coil is
When the value obtained by subtracting the processing delay time from
Whether the processing delay time exceeds the processing delay time record value
The current processing delay time exceeds the recorded value
Time, the processing delay time record value is updated according to the current processing delay time.
Newly, the recorded value will be delayed when the next ignition timer is set.
Use as timeIt is characterized by the following. [0007] [0008] [Action]According to the first aspect of the present invention, a plurality of specified
Input a crank pulse representing the
Cylinder discrimination between specific crank pulses
Input a predetermined number of cam pulses
Crank position is grasped based on the pattern and cylinder
Performs discrimination and sets a section for each input of the above crank pulse
The time from the start position of the section related to ignition
To turn on and off the ignition coil to control ignition.
When performing a crank pulse input synchronized with the engine rotation
Section indicating the current cylinder and crank position in the processing for each force
Is determined to be a preset ignition section
I do. Then, when it comes to the section related to ignition, the engine
When turning on / off the ignition coil set based on the operating state
In the meantime, the ignition timer is actually set from the crank pulse input.
The value obtained by subtracting the processing delay time until
Set the ignition coil to ignite and set the ignition coil
The value obtained by subtracting the processing delay time from the
When the current processing delay time is
It is determined whether or not it is exceeded. And the current processing delay
When the time exceeds the recorded value, the current processing delay time
Update the recorded value of the processing delay time and use the recorded value for the next ignition.
Used as the processing delay time when setting the timer. [0009] [0010] Embodiments of the present invention will be described below with reference to the drawings.
I do. The drawings relate to an embodiment of the present invention, and FIG.
The partial flowchart 1 and 2 of the Masset subroutine
Partial flowchart of ignition timer set subroutine
2, Figure 3 is a flowchart of the periodic interrupt processing every 0.5ms
FIG. 4 is a flowchart and diagram of classain interrupt processing.
5 is a flowchart of the job priority process, and FIG.
Partial flow chart 1 of line subroutine, FIG. 7 shows job
Partial flow chart 2 of the execution subroutine, FIG.
3 and FIG.
Partial flowchart of job execution subroutine 4, FIG.
Is the flowchart of the crank position calculation subroutine,
11 is a flowchart of the CCAS / RCAS discrimination subroutine.
FIG. 12 shows an ignition schedule creation subroutine.
Partial flow chart 1 and Fig. 13 create ignition schedule
Partial flowchart 2 of the subroutine, FIG.
Partial flowchart 3 of the schedule creation subroutine,
FIG. 15 is a partial flowchart of the ignition schedule creation subroutine.
Charts 4 and 16 show the flow of interrupt processing at the end of ignition.
FIG. 17 is an explanatory diagram showing the execution state of a job.
18 is an explanatory diagram of a job flag, and FIG.
FIG. 20 shows job execution flags and overlays.
FIG. 21 is an explanatory diagram showing a change in the top counter, and FIG.
FIG. 22 is an illustration of the shift buffer, and FIG.
FIG. 23 is an illustration of a cylinder / crank position state map.
FIG. 24 shows the ignition sequence and ignition interval variables.
FIG. 25 is an explanatory diagram of the ignition schedule, and FIG.
Explanatory drawing of the Joule pointer table, FIG.
FIG. 28 is an explanatory diagram of a masset, FIG.
FIG. 29 is a view showing the relationship between the electrical cylinder information and the ignition cylinder information.
FIG. 30 shows the crank position and the stroke of the engine.
FIG. 31 is a schematic diagram of an engine system, and FIG.
2 is a front view of a crank rotor and a crank angle sensor, FIG.
3 is a front view of the cam rotor and the cam angle sensor, and FIG.
FIG. 3 is a circuit configuration diagram of a control system. In the engine control system of the present embodiment,
Electronic control centered on the microcomputer shown in 34
The engine system shown in FIG.
Control of fuel injection, ignition timing, etc.
You. The microcomputer of the ECU 50 has a new
Operating system (OS) based on the new concept
The OS is used to process the signal input from each sensor.
Processing, engine speed calculation processing, intake air amount calculation processing, fuel
Control such as fuel injection amount setting processing, ignition timing setting processing, etc.
Jobs for each item are managed and executed efficiently
It has become. First, it is controlled by the ECU 50.
The configuration of the engine system will be described. As shown in FIG. 31, the engine 1 (shown in FIG.
And a horizontally opposed 4-cylinder engine)
An intake manifold 3 is provided at the intake port 2a of the head 2.
The air manifold is connected upstream of the intake manifold 3.
A throttle passage 5 is communicated via the chamber 4.
Upstream of the throttle passage 5, via an intake pipe 6
The air cleaner 7 is attached, and the air cleaner 7
In the air intake chamber 8, which is the intake of the incoming air
Are in communication. An exhaust port 2b is connected to an exhaust port.
An exhaust pipe 10 is communicated via a manifold 9,
A catalytic converter 11 is interposed in the pipe 10 and is
Are in communication. On the other hand, the throttle passage 5
A throttle valve 5a is provided.
An intercooler 13 is interposed in the upstream intake pipe 6,
Further, on the downstream side of the air cleaner 7 of the intake pipe 6,
A resonator chamber 14 is provided. Also, the resonator chamber 14 and the resonator
The intake manifold 3 communicates with the throttle
Bypass for bypassing the upstream and downstream sides of the lube 5a
Road 15 has an idle speed control valve (IS
CV) 16 is interposed. Furthermore, this ISCV1
Directly downstream of the valve 6 when the intake pressure is negative,
When the intake pressure becomes positive due to supercharging by the
Check valve 17 that closes when
You. The turbocharger 18 is connected to the intake pipe.
6, a compressor is provided downstream of the resonator chamber 14.
And the turbine is interposed in the exhaust pipe 10
I have. Furthermore, the turbocharger 18
A wastegate valve 19 is interposed at the housing inlet.
The wastegate valve 19 includes a wastegate valve.
An actuating actuator 20 is provided in series. Actuator for operating the wastegate valve
Is divided into two chambers by a diaphragm, one of which is
For duty solenoid valve 21 for wastegate valve control
Forming a pressure chamber that communicates with the other,
A split housing a spring for urging the valve 19 in the closing direction
To form a cooling chamber. The wastegate valve control duty saw
The solenoid valve 21 is connected to the resonator chamber 14 and the
Under the compressor of the turbocharger 18 of the intake pipe 6
It is interposed in the passage that communicates with the flow
Depending on the duty ratio of the output control signal,
The pressure on the side of the generator chamber 14 and the downstream side of the compressor
And actuate the above wastegate valve actuation
The pressure is supplied to the pressure chamber of the heater 20. That is, the above-mentioned c is controlled by the ECU 50.
Controls duty solenoid valve 21 for est gate valve control
The actuator 20 for operating the wastegate valve
To operate the exhaust gas by the waste gate valve 19.
By adjusting the relief, the turbocharger
The supercharging pressure by the control unit 18 is controlled. In addition, the intake manifold 3 is absolutely required.
The pressure sensor 22 is communicated via a passage 23 and the passage 2
3, the absolute pressure sensor 22 and the intake manifold
Inlet pipe pressure / large for selectively communicating with air port 3 or atmosphere
An air pressure switching solenoid valve 24 is interposed. Further, each of the intake manifolds 3
The injector 25 is located immediately upstream of each intake port 2a of the cylinder.
And for each cylinder of the cylinder head 2
And a spark plug 26 whose tip is exposed to the combustion chamber.
The ignition plug 26 is provided with a point provided for each cylinder.
The igniter 27 is connected via the fire coil 26a.
You. The injector 25 has a fuel tank 2
8 through an in-tank type fuel pump 29
The fuel is pumped through the filter 30 and the pressure is regulated.
The pressure is adjusted by the data 31. The air cleaner of the intake pipe 6
Hot wire or hot film immediately downstream of 7
The intake air amount sensor 32 of a type or the like is interposed,
A throttle opening sensor 33a and an eye
Throttle sensor 33 with dollar switch 33b
Are connected. Further, the cylinder block of the engine 1 is
The knock sensor 34 is attached to the
Cooling that connects both left and right banks of the cylinder block 1a
A cooling water temperature sensor 36 faces the water passage 35, and
O2 is added to the collecting portion of the exhaust manifold 9 of the pipe 10.
A sensor 37 is exposed. The cylinder block 1a is supported by
Crank rotor 38 is attached to the crankshaft 1b
An electromagnetic pick-up is provided around the outer periphery of the crank rotor 38.
A crank angle sensor 39 made up of
You. Furthermore, it is connected to the camshaft 1c of the engine 1.
A magnetic rotor or the like on the cam rotor 40
A cam angle sensor 41 for cylinder identification is provided in opposition. still,
The crank angle sensor 39 and the cam angle sensor 41
Is not limited to magnetic sensors such as electromagnetic pickups, but also optical sensors.
May be a sensor. The crank rotor 38 is shown in FIG.
As described above, the protrusions 38a, 38b, 38c are formed on the outer periphery.
These projections 38a, 38b, 38c are
Before compression top dead center of cylinders (# 1, # 2 and # 3, # 4) (BTD
C) It is formed at the positions of θ1, θ2, θ3.
Where θ1 = 97 ° CA, θ2 = 65 ° CA, θ3
= 10 ° CA. Each of the protrusions of the crank rotor 38 is
30 detected by the crank angle sensor 39.
BTDC 97 °, 65 °, 1
A crank pulse of 0 ° is output every 1/2 rotation of the engine (180 °).
° CA). And at the input interval of each signal
Time is measured by a timer, and the engine speed is calculated.
It is. The projection 38b is used as a base for setting the ignition timing.
It becomes a quasi-crank angle, and the projection 38c
It becomes the reference crank angle at the start time and fixed at the start.
The crank angle indicates the ignition timing. Further, as shown in FIG.
On the outer periphery of the cylinder 40, projections 40a, 40b,
40c are formed, and the projections 40a compress the # 3 and # 4 cylinders.
Formed at the position of θ4 after the top dead center (ATDC),
b is composed of three protrusions, and the first protrusion is A of the # 1 cylinder.
It is formed at the position of TDCθ5. Further, the protrusion 40
c is formed by two projections, and the first projection is A of the # 2 cylinder.
It is formed at the position of TDCθ6. In this embodiment
Are θ4 = 20 ° CA, θ5 = 5 ° CA, θ6 = 20 °
CA. Then, each projection of the cam rotor 40 is raised.
The combustion angle of each cylinder is detected by the cam angle sensor 41.
When the order is # 1 → # 3 → # 2 → # 4, this combustion line
The sequence and the cam pulse from the cam angle sensor 41 are counted.
Pattern with the value counted by the counter (the time in FIG. 30).
Cylinder discrimination is performed based on the chart). On the other hand, the ECU 50 shown in FIG.
Main computer for firing control, ignition timing control, etc.
51 and a dedicated subcomputer for performing knock detection processing.
It is configured around two computers with the
A constant voltage circuit 53 for supplying a predetermined stabilized power to
Various kinds of peripheral circuits are incorporated. The constant voltage circuit 53 includes an ECU relay 54
Connected to the battery 55 through the relay contact of
In the battery 55, a relay coil of the ECU relay 54 is provided.
It is connected via an ignition switch 56.
The constant voltage circuit 53 is directly connected to the battery 55.
Connected to the fuel pump relay 57.
A fuel pump 29 is connected via a point. That is, the above-mentioned constant voltage circuit 53
When the ignition switch 56 is turned on, the ECU
-54, the control power supply is
And the ignition switch 56 is turned off.
When power is supplied, supply power for backup. The main computer 51 includes a CPU 5
8 (hereinafter, referred to as main CPU 58), ROM 59,
RAM 60, ignition switch 56 is OFF
The backup voltage from the constant voltage circuit 53
Backup RAM 6 supplied with source and holding data
1, counter / timer group 62, serial communication interface
SCI63 and I / O interface
Microcontroller connected via a bus line 65
Computer. The counter / timer group 62 has a free
-Run counter, cam angle sensor (hereinafter referred to as Cam
Abbreviated as a signal input)
Various counters, fuel injection timer, ignition timer, described later
Periodic interrupt to generate a periodic interrupt every 0.5ms
Timer, crank angle sensor (hereinafter referred to as class
Abbreviated) signal input interval clocking timer, and
And a watchdog timer for system abnormality monitoring
Various timers are collectively referred to for convenience.
In the computer 51, various other software
An account timer is used. The sub-computer 52 is also
As with the main computer 51, the CPU 71 (hereinafter referred to as
CPU 72), ROM 72, RAM 73,
Counter / timer group 74, SCI 75, and I / O in
Interface 76 is connected via bus line 77
A microcomputer, the main computer being
51 and the subcomputer 52 are the SCIs 63 and 7
5 connected to each other by a serial communication line
I have. I / O in of the main computer 51
The interface 64 has an input port with an intake air amount sensor.
C, throttle opening sensor 33a, water temperature sensor 3
6. O2 sensor 37, absolute pressure sensor 22, vehicle speed sensor 4.
2, and the battery 55 is an 8-channel input A / D
While connected via the converter 66, the idle switch
Switch 33b, crank angle sensor 39, cam angle sensor 41
Is connected, and to detect the starting condition
The starter switch 43 is connected. In this embodiment, the A / D conversion
The device 66 uses the inputs of 7 channels, and the remaining 1
The channel is reserved. The I / O interface 64
An igniter 27 is connected to the output port.
ISCV16, injector 2 via drive circuit 67
5. The relay coil of the fuel pump relay 57 and c.
Est gate valve control duty solenoid valve 21, suction
The tracheal pressure / atmospheric pressure switching solenoid valve 24 is connected.
You. On the other hand, the I / O of the subcomputer 52
The interface 76 has a crank angle
Sensor 39 and the cam angle sensor 41 are connected.
Via a / D converter 78, a frequency filter 79, and an amplifier 80
The knock sensor 34 is connected to the
The knock detection signal from the sensor 34 is predetermined by the amplifier 80.
After being amplified to the level of
Required frequency components are extracted, and the A / D converter 78
Is converted to a digital signal and input
I have. In the main computer 51, each sensor
Process the detection signals from
Calculate the timing. That is, the intake air amount sensor 32
The amount of intake air is calculated from the output signal of
Based on various data stored in the backup RAM 61.
Calculate the fuel injection amount corresponding to the intake air amount.
Further, the ignition timing and the like are calculated. Then, a drive path corresponding to the fuel injection amount
The pulse width signal is transmitted to the drive circuit 67 at a predetermined timing.
Output to the injector 25 of the corresponding cylinder to inject fuel
The ignition signal is sent to the igniter 27 at a predetermined timing.
And the ignition plug 26 of the corresponding cylinder is ignited. As a result, the mixture supplied to the corresponding cylinder is
Explodes and burns, and faces the manifold of exhaust manifold 9
O2 sensor 37 detects the oxygen concentration in the exhaust gas.
After this detection signal has been waveform-shaped,
It is compared with the reference voltage (slice level) by the CPU 58,
The engine's air-fuel ratio state is richer than the target air-fuel ratio.
It is determined whether the air-fuel ratio is on the lean side.
Feedback control is performed to obtain the fuel ratio. On the other hand, in the sub-computer 52,
Knock sensor based on engine speed and engine load
Set the sample interval of the signal from
A / D conversion of signal from knock sensor 34 at high speed in section
To accurately convert the vibration waveform to digital data,
The presence or absence of occurrence is determined. The I / O interface of the subcomputer 52
Interface 76 is connected to the main computer
Connected to the input port of the I / O interface 64 of the
The knock determination in the sub-computer 52 has been continued.
The fixed result is output to the I / O interface 76. So
In the main computer 51, the sub-computer
The determination result indicating that knocking has occurred is output from the computer 52.
Then, knock from the serial communication line via SCI63.
Data is read, and immediately based on this knock data
The ignition timing of the corresponding cylinder is delayed to avoid knocking. In such an engine control,
In the in-computer 51, signal input from each sensor
Processing, engine speed calculation, intake air amount calculation, fuel injection
Various programs for each item such as quantity calculation and ignition timing calculation
System is executed efficiently under the control of one OS. this
The OS has various management functions for vehicle control and
And internal strategies closely related to this management function
And systematically combine various jobs. The management functions of the OS include: (1-1) Job priority processing (1-2) Split file pairs for each job by section definition
Yes (1-3) Stack usage monitoring function (1-4) Monitor function of abnormal interrupt operation (1-5) Standard maps and markers that do not create unique constraints for each job
Semi-work memory setting And other functions to improve the control strategy development environment.
As well as maximize limited CPU capabilities
To perform equal time interval processing, which is the basis of digital control theory.
It can be achieved as much as possible. As an equal time interval process, every 0.5 ms
2, 4, 10, 50, 250 based on periodic interrupts
There are five types of equally-spaced interrupt jobs for each ms.
In addition, as processing synchronized with engine rotation,
High-priority classene that is immediately executed by a click angle signal input
Jobs (hereinafter simply referred to as Classen jobs) and more
Crank angle signal when there is no other job with higher priority
Low priority, relatively low urgency, interrupted by input
Classen job and are prepared. Each of these jobs is a class job>
2ms job> 4ms job> 10ms job> low priority
Class job> 50 ms job> 250 ms job
In order, the priority level of 7-1 is changed from higher to lower.
As shown in FIG. 17, high-speed jobs
On the other hand, low-speed jobs are divided and processed.
A multi-waiting process is performed. Each program that operates under the OS described above
Indicates the order of management area by function, that is, section area.
Are arranged in each section area.
It is named by the application declaration. Each strate
The main section area used on the G-file side is ○ Variable declaration area ○ Self-file name, automatic recording area when creating files ○ Setting data area ○ Class job area ○ 2ms job area ○ 4ms job area ○ 10ms job area ○ Low priority class job area ○ 50ms job area ○ 250ms job area ○ Reset initialization job area ○ Initialization job area at engine stall ○ Background job area ○ Program body area The program is developed by dividing the file for each function.
Enables structured description of programs
I do. The above-mentioned OS has the above management.
As an internal strategy close to the function, (2-1) A / D conversion processing (2-2) Calculation of various information related to crank position (2-3) Simulation function for debugging (engine rotation
And A / D conversion) (2-4) Set ignition timer (2-5) Set fuel injection timer And other functions.
Various service routines are provided in each job. Conventionally, such a function is provided at each job level.
Was achieved, but in this system,
A / D conversion prepared by the OS and processed by the OS
Results, crank position information, engine speed, etc.
In each job on the user side, the fuel injection amount, ignition timing, etc.
When these settings are made, these indicated values are
The firing timer and ignition timer are set
You. Next, the ignition of the main computer 51
The control functions are described in FIGS.
This will be described with reference to the flowchart of FIG. In addition,
The computer 52 is a computer dedicated to knock detection processing.
Therefore, the description of the operation is omitted. First, the ignition switch 56 is turned on.
Power is turned on and the system is reset.
A reset interrupt is activated and various initializations are performed.
And a periodic interrupt is started every 0.5 ms.
The periodic interrupt timer is started and the crank angle sensor 3
9 (BTDC 97 °, 65 °, 10 °)
Classen which is activated 6 times per engine revolution per CA)
Interrupts are allowed, and then the background job
It becomes a line state. Then, on this background job
Therefore, a periodic interrupt every 0.5 ms and 6
7th-level jobs are prioritized due to the number of class interrupts
It is processed. In these two interrupts, their own processing
After jumping to the common address,
Execute the process. Note that the above-mentioned reset interrupt is transmitted to the internal operation.
When performing division by 0 or an infinite loop
Due to factors that do not occur during normal times,
Is activated. First, a periodic interrupt every 0.5 ms shown in FIG.
Only the following will be described. In this periodic interrupt, step S1
At 00, an OS work area is set, and at step S101,
When the watchdog timer is initialized, go to step S102
Then, the P-RUN flag is set once every 20 times, that is, 10 times.
Invert every ms. This P-RUN flag is not shown.
Protection system does not automatically reset the system.
This flag is used to prevent the system from operating properly.
As long as it is turned over at regular intervals (every 10 ms)
The operation of the protection circuit is blocked. Next, the process proceeds to step S103, and the switch is turned off.
Perform force transfer. This switch output is
These are the ON and OFF values of the bits written to the memory.
The output port of the I / O interface 64 directly from the job
The value of the memory every 0.5ms on the OS side
Transfer to output port. Next, when the process proceeds to step S104, A / D conversion is performed.
Execute the subroutine to make various settings related to A / D conversion
No, in step S105, a job flag creation subroutine
Is executed, and each time interval of 2, 4, 10, 50, and 250 ms is executed.
Create job flag JB_FLG indicating job interrupt request
After that, in step S106, A / D conversion is started. The above A / D conversion is basically performed by A / D conversion
8 channel input of the unit 66 is converted every 0.5 ms.
It is processed for each order, and all inputs are converted every 4 ms
It is. However, one specific channel has rotational pulsation.
Crank angle for A / D conversion of generated suction pipe pressure
Synchronized every 90 ° (with 0.5ms time accuracy), conversion order
Process is performed in the form of interrupting the turn, and subsequent input
Is delayed by one. When the engine speed is 3750 rpm or more,
Indicates that the last input of the A / D conversion is completely stopped, and
Above 500rpm, the penultimate input also stops
However, the order of A / D conversion is throttle opening, intake air
Cooling water temperature, voltage, etc.
The one that changes relatively slowly is set to come later,
And the last A / D conversion order is set to crank synchronization input.
There is no particular problem. Further, as shown in FIG.
The lag JB_FLG indicates that each bit of the 1-byte variable is
Is assigned as a flag corresponding to the
Job requests can be made at the same time. This one bar
Bits 1 to 7 of the site variable correspond to priority levels 1 to 7.
Corresponding to a 250 ms job, a 50 ms job,
Low priority classa job, 10ms job, 4ms job
, 2ms job, and class job flag
Have been. When a predetermined bit is set,
A corresponding priority level job interrupt request is made. still,
Bit 0 is assigned to the background job flag
Not normally referenced. Then, in step S105, the job flag
Create job flag JB_FLG by creation subroutine
After starting the A / D conversion in step S106,
Proceeds to step S107, and sets the job flag JB_FLG.
Whether the bit corresponding to any job is set
Find out. As a result, the job flag JB_FLG
When no job is standing, any job
Since there is no request, the interrupt is terminated and the job flag JB_F
If any bit of LG is set,
Proceeding to step S108, the current level (this periodic interrupt is executed
Job at a given priority level was running at the time
(State) Check whether the following flags are present. In the above step S108, the files below the current level are
When there is no lag, the figure indicated by the label WAR_JB
Jump to the job priority processing of No. 5
If there is a lag, in step S109, it is lower than the current level
The overlap counter OLC of the level of
You. The overlap counter OLC is
This is a counter for storing job requests.
One byte is allocated for each job, and the job flag JB_F
Increment when job request by LG, end of job
Sometimes decremented. That is, by the counter
By storing job requests, multiple requests
We can respond. Next, from step S109 to step S1
Go to 10 and check if there are any flags higher than the current level.
If there are no flags higher than the current level,
Exits the interrupt after exiting the
If there is, the job priority processing of the label WAR_JB
Jump to On the other hand, in response to the periodic interrupt every 0.5 ms,
However, in the interrupt by the class of FIG.
In step S201, when the work area for the OS is set.
The subroutine for calculating the crank position and half-turn time described later
To determine the current crank position.
Rank position variable and the sum of the last three classen intervals
Is calculated. The above crank position variables are prepared in the OS.
Are system variables # 1 to # 1 as shown in FIG.
The crank position for # 4 cylinder is 97 °, 65 °, 1
It is divided into 12 state sections by 0 ° CA, and the current
Indicates the rank position. That is, numerical values of 0, 1, and 2 are set for each cylinder.
Is a crank position information variable S_CC indicating the order of class input.
AS, # 1 cylinder is 0, # 3 cylinder is 1, # 2 cylinder is 2, #
Cylinder information variable S_ indicating the combustion order of the cylinders, where four is three cylinders
The class order and energy are shown by RCAS and numerical values from 0 to 11.
Crank overall position variable S_AC comprehensively representing cylinder order
The current crank position is represented by three AS variables.
Furthermore, it was confirmed that the crank position was correctly determined with confirmation.
0, the discrimination result is inconsistent, and anxiety remains
Error level S_ECA with status 1 and unknown status 2
S indicates the determination status of the crank position.
ing. Note that, in FIG.
Are omitted from S_. Next, from step S201 to step S2
Proceed to 02, subroutine for calculating crank position and half rotation time
Check that crank position judgment has been completed normally
Is stored in accumulator A
By reading the code that is
Code 1, normal completion code 0). Then, in step S202, the accumulate
Data A is 1 and the crank position cannot be determined.
Interrupt, the interrupt is terminated and the accumulator A
Is 0 and the crank position is determined to be normal
To the step S203 to release the engine stall flag.
You. It should be noted that the engine stall flag indicates that the engine
Flag indicating that the
When the interval is 0.5 sec or more (about 30 rpm or less)
The engine processing routine prepared for the 50 ms job
The interrupt is set by the
And the engine stall state is released. Next, proceeding to step S204, the following points will be described.
Execute the fire timer set subroutine and set the ignition sequence
Ignition according to the ignition schedule described below
Set the timer. Next, in step S205, the fuel injection
Execute the shooting timer set subroutine and
The command value of the fuel injection amount set on the valve side (injection for each cylinder
Width), the fuel injection start time, etc.
Set and go to step S206. In step S206, this class is executed.
Whether the current job level is your own job level
The current situation is at the level of the Classen job itself.
In steps S207 and S208, the class job
Low priority class job overlap counter OLC
Is incremented by one, the interrupt is terminated, and the current job
When the sub-level is not the level of the class job,
In step S209, the current job level is changed to a low priority class
Find out if you are above the job level. Then, the current job level is changed to the low priority class.
If it is equal to or greater than the send job,
Proceed to step S210 to overrun the low priority class job.
When the lap counter OLC is incremented by 1, the step S2
In 11, set the job flag of the class job and
Jump to the job priority process of WAR_JB. On the other hand, in step S209, the current job
When the level is not higher than the low priority class job,
The process proceeds from step S209 to step S212,
When the job flag of the job is set,
Set the job flag of the priority class job and set the label
The process jumps to the WAR_JB job priority process. In this job priority process, step S300
Is a 1-byte variable indicating the priority level of the job.
When the level JB_LEV is increased by one, the process proceeds to step S301.
The job flag corresponding to this priority level is set
Check if it is not. And the job flag is not standing
If not, return to step S300 and continue at the job level.
When JB_LEV is increased by one and the job flag is set
To the step S302, the job flag is set.
The overlap counter OLC of the job to be initialized to 0
From 1 to 1 and proceeds to step S303. In step S303, the upper job flag
Check if there is a job, and if there is a higher job,
Returning to step S300, the above processing is repeated, and
If there is no job, the process proceeds to step S304, where the job
When the running flag JB_RUN is set, step S3
05, the top-level job execution subroutine
Execute the job. The job execution flag JB_RUN is
Set at the start of job execution and cleared at the end
This flag is used by the
Jobs interrupted by higher priority jobs
can do. For example, as shown in FIG. 20, JB_LE
While running a 10 ms job with V = 4, JB_LEV = 6
When a 2 ms job interrupt request is made, a 10 ms job
2ms job with higher priority
Is set to JB_RUN = 1, OLC = 1 and executed
Is done. During the processing of this 2 ms job, JB_
When an interrupt request of 4 ms job of LEV = 5 occurs,
This 4 ms job has JB_RUN = 0, OLC = 1
Interrupt is accepted but is not executed and waits
Becomes Thereafter, the job execution subroutine
When the execution of the job is completed, the process proceeds from step S305.
Proceed to step S306 to decrease the overlap counter OLC by one.
Then, in step S307, the overlap counter OLC
Check if it is zero. As a result, the overlap
Counter OLC is not zero, same priority level
If there are multiple job interrupt requests in step S3
Return to 05 and execute the job repeatedly,
When the data OLC becomes zero, the process proceeds from step S307.
Proceeding to step S308, the job execution flag JB_RUN is cleared.
Rear. Next, the process proceeds to step S309, where the job level
When JB_LEV is decremented by one and moved to the next job level,
In step S310, the job level JB_LEV is zero.
Check to see if it has become And the job level JB_
When the LEV is zero, this interrupt is terminated and the job
If the level JB_LEV is not zero, step S3
Proceed to 11 to check if the overlap counter OLC is zero
Find out what. In step S311, the overlap cow
When the job OLC is zero, the job
Return from step S311 to step S309
Therefore, lower the job level JB_LEV by one
Is repeated, and the overlap counter OLC
If not, the process proceeds to step S312, where the job
At the level, the job execution flag JB_RUN
To see if it has been set. In step S312, the job execution flag is set.
When JB_RUN is set,
Since the job was being executed, the interrupt was terminated and interrupted
Return to the previous job, and the job execution flag JB_RUN
If not set, return to step S304 and
Executes the job of the level and repeats the same processing. That is, in FIG. 20, JB_LEV
= 6 completed 2ms job, OLC = 0, JB_RU
When N = 0, the job level is reduced by one, and JB_
4 ms job with LEV = 5, JB_RUN = 0, OL
JB_RUN = 1 is set from the standby state of C = 1,
Be executed. Furthermore, when the 4 ms job is completed, JB
_LEV = 4, JB_RUN = 1 (job execution
From the state of (middle), the 2 ms job and the 4 ms job
The processing of the suspended 10 ms job is resumed. Thus, the periodic interruption every 0.5 ms,
Using the classroom interrupt as the basic timing,
Job flag J that informs the destination level and execution timing
As accurate as possible to create B_FLG, isochronous
Realizes interval processing and engine rotation synchronization processing,
Processing can be performed efficiently. In addition, basic timing
Job flag JB_F updated for each interrupt
Not by LG but by overlap counter OLC
When processing a job to store job multiplex requests
Time is long and the same job should be executed again
Should not be abandoned in the middle
In addition, the processing can be continued as far as possible. Next, the job execution subroutine shown in FIGS.
Will be described. First, in step S500, the job flag JB
The job to be executed with reference to _FLG is the class job
Check if it is not, and if it is not a class job,
Branch to label ALJ10, for class job
Proceeds to step S501, and determines whether or not cylinder discrimination is on.
Find out what. Then, when cylinder discrimination is not performed,
Exits the routine and does not execute the job.
When the judgment is made, the steps from the above step S501 are performed.
Proceed to S502 and refer to the value of the overlap counter OLC.
To determine whether or not it is in a multiple waiting state. In the above step S502, no multiplex wait state is set.
If not, proceed to step S503, and calculate
System variable S_ACAS issued (total crank position
Variable) as the user variable ACAS, while the multiple waiting list
If it is in the state, the process branches to step S504, and the user variable A
Add one CAS and divide by 12 to get a new
User variable ACAS, and this user variable ACAS
Are software like 0, 1, 2, ..., 11, 0, 1, ...
Update to. That is, the class job and the low priority class
Sen jobs are disturbed by themselves or higher priority jobs.
Class interrupts are not
Is executed in synchronization with the link angle sensor signal, and the system variable S
_ACAS is updated regardless of job delay. Therefore, during the job, the system variable S_AC
Refer to AS for information on cylinder and crank position.
Even if you try to work according to this information,
If you are delayed by another job,
Knowing information on the corresponding cylinder and crank position
become unable. For this reason, class jobs and low priority
For OS when in a helical job and not in multiple wait state
System variable S_ACAS for user variable ACAS
And execute this user variable ACAS as a job
Cylinder corresponding to itself even if it is updated every time
And information on the crank position is obtained and appropriate processing is performed.
To do so. Thereafter, the above step S503 or the above step S503 is performed.
Proceeding from step S504 to step S505, the work
After setting the rear, in step S506, the level zero interrupt
Only, and in step S507,
Move on to And in this Klasen job section
Execute the linked process, and in step S508, generate an interrupt.
Prohibit and exit the routine. Next, in step S500, the process to be executed now
If the current job is not a class job, the label AL
In step S510 of J10, check whether the job is not a 2 ms job.
In the case of a 2 ms job, the job
After setting the work area, in step S512, level zero
Is permitted, and in step S513, a 2 ms job
Move on to action. And linked to this section
Job body (based on the user's control strategy)
Routines or service routines prepared on the OS side
And interrupts are disabled in step S514.
Exit the routine. On the other hand, in step S510, the
If the job is not a 2 ms job, from step S510
Branching to step S520, the job to be executed is
Check if it is active. And when it ’s not a 4ms job
Branches to the label ALJ30 and in the case of a 4 ms job
Sets the work area of the job in step S521
Then, the process proceeds to step S522. Note that this 4 ms job is A
/ D conversion use job, and a system shift
The A / D conversion data is used via the buffer SSHB. In step S522, a level zero interrupt is generated.
Allow, then proceed to step S523, switch input
Is read, and in step S524, the section of the 4 ms job is read.
Then, execute the linked job body.
Then, when you leave the section of the 4ms job,
In step S525, the interrupt is prohibited, and the process proceeds to step S526.
Routine by shifting system shift buffer SSHB
Through. The system shift buffer SSHB is
As shown in FIG. 21, each A / D conversion result of 8 channels
Is stored at the head offset address 0, +8, +1
6, +24, +32, +34, +36, +38
Moly and A / D conversion result of crank synchronization every 4ms
Is stored at the head offset address-2 address
Once every 0.5ms
A / D conversion result is stored in one word (2 bytes)
You. From the head offset address 0, 4
It is a stage shift memory, and A / D for every 90 ° CA
The conversion result is stored, and the latest four data (for one rotation) are
Job. Also, the head offset
Addresses +32, +34, +36, and +38 are each 1
It is a word memory, and if the smoothing function is selected
In this case, the weighted average of the A / D conversion result is stored and stored.
Noise can be removed and the accuracy can be improved.
Data in these memories is available for slow jobs.
You. Each head offset address +8, +
From addresses 16 and +24, a 4-word memory is used.
It is used for a 4 ms job. Each of these
The memory stores the latest A / D conversion result, counting from the top, 4
After the value of the overlap counter OLC of the ms job
Is stored in the first word when the 4ms job is executed.
Data is read from the
Since the data of each word is shifted in order toward the beginning,
FIFO buffer read from previously stored data
It has become. That is, A / D conversion is performed every 0.5 ms.
It is performed accurately at a period of 4 ms by a periodic interrupt.
ms jobs are delayed by high-priority jobs
There is. Therefore, the FIFO buffer is used for A / D conversion delivery.
+ 8 ~, + 16 ~, +24 for 4ms job
After referring to the data of each FIFO buffer at address
At step S526, the data of each FIFO buffer is shifted in order.
To do that. On the other hand, in step S520, the
Job branches to label ALJ30 instead of 4ms job
In step S530, the number of jobs to be executed is 10
Check whether it is a ms job or not, and if it is a 10 ms job,
In step S531, set the work area for the job and
In step S532, if an interrupt of level zero is permitted, step S5
At 33, go to the section on 10ms job
Execute the routine and disable the interrupt in step S534 and execute the routine.
Through. In the section of the above 10 ms job,
Is an engine that calculates the engine speed from half a revolution
RPM calculation subroutine, ignition schedule
The execution subroutine is a service routine on the OS side.
It is prepared. In step S530, the job to be executed is
If the job is not a 10 ms job, the above step S5
Branching from 30 to step S540, the job to be executed is low
Check whether it is the first class job. And low
If the job is not the first class job, go to step S540 above.
Branch to label ALJ50, and the job to be executed is low.
If it is a first class job, start from step S540.
Proceed to step S541 to check if the current state is
Check whether or not. Then, the current state is not the multiplex wait state.
Sometimes, the process proceeds from step S541 to step S542.
The system variable S_ACAS (Crank total position change)
Number) as the user variable ACAS and proceed to step S544
In the multiplex wait state, the process proceeds from step S541.
Branch to step S543 to increase the user variable ACAS by one.
After taking the remainder divided by 12, proceed to step S544
No. In step S544, the work area of the job
Is set, and in step S545, a level 0 interrupt is enabled.
Then, in step S546, the section of the low priority class job
After executing the job body, go to step S547.
To disable the interrupt and exit the routine. Further, at the label ALJ50, the step
Whether the job to be executed in S550 is a 50 ms job
And if it is a 50 ms job, go to step S551
To set the work area for the job, and proceed to step S552.
No. In step S552, a level zero interrupt is generated.
If permitted, in step S553, the section of the 50 ms job is
To the option, and the engine stall processing routine prepared on the OS side,
Cylinder-specific ignition timing retard routine, fuel injection start timing
Executes setting routines, etc.
Executes a routine based on the strategy. And the job
After the end of step, interrupts are disabled in step S554, and the routine
Exit. On the other hand, the job to be executed in step S550
If the job is not a 50 ms job, the above step S5
Branches from 50 to step S560, and sets the job work area
Once set, a level zero interrupt is allowed in step S561.
Yes, proceeding to step S562, the section of the 250 ms job
After moving to the job area and executing the job body, step S5
In 63, interrupt is prohibited and the routine exits. In the job priority processing described above,
It is necessary to always know the position of the
For each interruption, the crank position calculation subroutine shown in FIG.
Is executed and the crank position variable S_CCA described above is executed.
S, S_RCAS, S_ACAS, S_ECAS calculated
Is done. Note that in the following description, system variables are used.
Is omitted from the crank position variable. In this crank position calculation subroutine,
First, in step S600, the lower 2 bytes of the classa timer are
Store in the lower 2 bytes of the soft timer. This classen
The timer is a hardware timer provided in the ECU 50.
Yes, in this embodiment, a maximum of 2
Counting is possible up to 55ms, but 3 bytes in memory
To secure a continuous area and use it as a soft timer.
You. That is, the lower two bytes of the soft timer are
Transfer the 2 bytes of the spiral timer and
The third byte by an interrupt generated by
Up to 64 seconds at maximum.
ec (255 ms x 256)
Use a special hardware timer of 16 bits or more.
The distance between classes is extremely small, such as during cranking, without using
It can easily cope with a long case. Next, steps S600 to S601 are performed.
Check to see if the classen interval is less than the set time
You. This set time is the clock corresponding to the maximum engine speed.
Time as helix interval, for example, 0.3 ms,
When the classen interval is less than the set time in step S601
Is the counting error of the classa timer due to noise contamination.
As an error code in accumulator A in step S602.
Store the code 1 and exit the routine. Also, the above steps
If the classen interval is longer than the set time in S601,
Assuming that the spiral timer count is normal, proceed to step S603
move on. In step S603, CCAS R
Execute the CAS determination subroutine to determine the crank position
Then, in step S604, the error level ECAS is 2.
Or not, i.e.,
Check whether the lock position is unknown or not, and ECAS = 2
In the case of, the process branches to step S605 and accumulator A
Is stored in the error code 1 and the routine exits. On the other hand, in step S604, ECAS6042
In step S606, the process proceeds to step S606,
The eye is set to 0. Then, the process proceeds to step S607, where the clan
Whether the position information variable CCAS is 1,
Current crank position is BTDC 65 ° CA to 10 ° CA
(See FIG. 19), and CCAS = 1
Jumps from step S607 to step S609
However, when CCAS ≠ 1, the process proceeds from step S607.
Proceed to step S608, increment the A / D conversion request by 1,
Proceed to step S609. This A / D conversion request is based on the crank angle.
A signal for instructing crank synchronous A / D conversion every 90 °
A lag-like variable that takes values 0 and 1, when the value is 1.
Instruct crank synchronous A / D conversion. That is,
As described above, one channel out of eight channels of A / D conversion is used.
A / D conversion is performed every 90 degrees of crank angle.
When CCAS becomes 0 (BTDC 97 °), CC
When AS reaches 2 (BTDC 10 °), the crank
A / D conversion request is set, and every 0.5 ms
A / D conversion for every 90 ° crank angle with respect to A / D conversion order
It is made to interrupt. Then, in step S609, the cylinder information variable
RCAS is tripled and the crank position information variable CCAS is added.
To calculate the crank overall position variable ACAS
Then (ACAS = RCAS × 3 + CCAS),
In step S610, the soft timer is limited to 2 bytes and the
If the send timer overflows, the lower 2 bytes
To FFFF (255 ms) and proceed to step S611.
No. In step S611, the crank total position variable
ACAS = 0, 1, 2,..., 11
Element) Place classen interval data in TCAS [ACAS].
In step S612, the crank position information variable CCA
Array (element of) MTCSX with S = 0, 1, 2 as a subscript
Store classen interval data in [CCAS]. The sequence TCAS is as shown in FIG.
, The engine corresponding to ACAS = 0, 1, 2,...
12-Way that stores classen interval data for two rotations
Is the classen spacing table of the code, and the array MTCSX
Is CCAS = 0, 1, 2, as shown in FIG.
3 where three classen interval data corresponding to are stored
It is a word classen interval table. That is, the CCAS.
RCAS determination subroutine (details will be described later) and step
Each information variable CCAS, RCAS, ACA by step S609
S is updated, for example, CCAS = 1, RCAS = 1,
ACAS = 4 and the crank position is currently # 3
When the cylinder BTDC is 65 to 10 CA,
# 3 cylinder BTDC97 @ CA timed by Ima
BTDC65 of # 3 cylinder from class signal input at
時間 Time until class signal input in CA (class
The interval data) is converted to the total position variable ACAS in step S611.
ACAS = 3 add of array TCAS using
And store the crank position in step S612.
Array MTCSX using information variable CCAS as a parameter
Store at the address of CCAS = 0. Therefore, classen interrupt by classen input
Total position variable ACAS, crank position information variable C
Each time CAS is updated, it is stored in the arrays TCAS and MTCSX.
Are sequentially updated, so the array TCAS is referred to.
By this, the class at each crank position of each cylinder is
Change in rotation interval (change in rotation speed)
It is possible to determine whether a cylinder has misfired, the combustion state, etc.
The operating conditions of all cylinders can be grasped. Also,
By referring to the array MTCSX, the latest class
The interval can be obtained and the current driving situation can be quickly grasped.
Can be grasped. Next, when the flow advances to step S613, the process returns to step S613.
Check the value of the error level ECAS. Here, the aforementioned
Already confirmed that ECASＡ2 at step S604
The error level ECAS is 1 or not.
That is, it is an estimated state in which the determination of the crank position remains uneasy.
Check whether or not. In the above step S613, ECAS # 1 (snaw
ECAS = 0), and the crank position is confirmed
If it is determined, the process proceeds from step S613.
Proceeding to step S614, sum of the latest three classen interval data
(Classen interval data stored in array MTCSX
Is the half-turn time MTCS18 of 3 bytes
It is calculated (MTCS18 = ΣMTCSX). That is,
The half-rotation time MTCS 18 is
The position information variable CCAS is updated in the array MTCSX.
Is calculated every time the data of BTDC is 97 °,
For each of the 65 ° and 10 ° positions, calculate the moving sum of classen intervals.
So that you can always get the latest data
I have. On the other hand, in the above step S613, ECAS = 1
In the estimated state where the determination of the crank position remains uneasy.
The half rotation time MTCS1 from the array MTCSX
In step S615, the half rotation time estimation subroutine is not performed.
Execute the routine and change the value of the crank position information variable CCAS to
Accordingly, half rotation time MTCS 18 is estimated. That is, when CCAS = 0, BTDC
10 ° to ATDC 83 ° (BTDC 97 ° for the next cylinder)
From the angle 93 ° between the previous classen interval x 180/93
Is estimated to be a half rotation time MTCS18, and CCAS = 1
From the angle of 32 ° between BTDC 97 ° and 65 °
Half rotation time MTCS1
Estimate to be 8. Further, when CCAS = 2, BTDC
From the angle 55 ° between 65 ° and 10 ° to the previous classen interval
X180 / 55 is estimated as the half rotation time MTCS18. Then, in the above step S614, the half rotation time M
After calculating the TCS 18, or in the above step S615
After estimating the half rotation time MTCS18 in step S6,
Proceed to 16 for 2 bytes of 3-byte half-turn time MTCS18.
And store in the specified variable MTCSK
In step S617, the variable MTCSK is doubled and changed.
Stored in several MTCSK4, normal end in step S618
Store code 0 in accumulator A and exit the routine
You. Then, the above-described job execution subroutine
The engine speed is calculated every 10 ms.
Engine rotation speed is 3 bytes half rotation time MTCS18
Calculated from the reciprocal of the variable MTCSK limited to 2 bytes
Is done. More specifically, the unit time of the number of revolutions per minute rpm
30 sec, which is half of (1 min), is a half rotation time MT
By dividing by CSK, 2 in units of 1 rpm
Variable NRPM in bytes, ie engine speed
Is calculated (NRPM = 30 sec / MTCSK).
Engine speed is one of the basic parameters
It is used for the control amount calculation process. Next, the CCAS / RCA shown in FIG.
The S determination subroutine will be described. This subroutine
First, in step S800, the cam angle
Limit to 0-4. With this Camsen counter
The number of cam pulses from the cam angle sensor 41 to be counted
The number of cam pulses between spiral signal inputs) is shown in FIG.
As described above, the value is 0 to 3 in the normal state.
Could cause an abnormal count of 4 or more
Limit the Camcen counter to 0 to 4
The state is represented by 4. Next, the process proceeds to step S801, where
Counter value, cylinder information variable RCAS, crank position
5 × 4 × 2 combination (cam
Five types of sen counters 0 to 4, cylinder information variable RCAS
Are 0 to 3 and the crank position information variable CCAS is
0, 1, and 2).
CCHMA Cylinder / Crank Position Status Map
Read P. This cylinder / crank position state map CCH
As shown in FIGS. 23 (a) and (b), the MAP
Link position information variable CCAS is 0 or 1,
Crank position information change which is a change point of cylinder information variable RCAS
When the number CCAS is 2, it is divided into
All possible states of each combination of cylinder information variables RCAS
Whether the condition is normal or abnormal and whether it can be determined or not
Status data indicating the current status is stored.
Value and know what to do next. The status data is 2-bit data.
The value of bit 0 indicates whether it is determined or estimated.
A value of 1 indicates normal or abnormal. The value of bit 0 is
When 0, it is determined and when 1, it indicates the estimation, which can be seen from FIG.
Thus, only when the Camcen counter is 2, 3
Otherwise, it is in a state where it has to be estimated. Ma
The value of bit 1 is normal when it is 0 and abnormal when it is 1.
And the Camsen counter is 3 or less, and FIG. 19 and FIG.
30 is normal only when the combination of
Other than this is abnormal. For example, CCAS = 0 or 1, ie,
For BTDC 97 ° to 10 ° of a certain cylinder,
Where the counter value is 0 and the cylinder information variable RCAS is 0
As can be seen from FIGS. 19 and 30,
Since it is sufficient to estimate the position normally, cylinder /
Binary number in the corresponding area of the rank position status map CCHMAP
The state data of 01 (normal estimation) is stored in
Further, when the Camsen counter is 1 and the cylinder information variable RCAS is
The combination where is 0 is obviously abnormal and is estimated.
Cylinder and crank position status map
In the corresponding area of CCHMAP, 11 (abnormality estimation) in binary
State data is stored. In addition, CCAS = 2, that is, a certain cylinder
BTDC10 ° to ATDC83 °
Combination where counter is 3 and cylinder information variable RCAS is 0
Is correctly established with the crank position across the TDC of cylinder # 1.
Cylinder / crank position state map CCHM
State data of binary 00 (normally determined) in the corresponding area of the AP
Data is stored, and the Cam
Combination where the cylinder information variable RCAS becomes 0
Although it is abnormal, it can not be confirmed if there are two Camsen inputs
Cylinder and crank position
10 In binary number in the corresponding area of CCHMAP (abnormality determined)
State data is stored. In step S801, the cylinder / clan
Reads status data from the lock position status map CCHMAP
And proceeds to step S802, where the error level ECAS is 2
Whether or not the current state is the cylinder discrimination.
Check if the status is unknown and ECAS = 2
In step S803, the cylinder / crank position status
Bit 0 of the status data read from the CCHMAP
0, that is, whether it is in the final state.
Sometimes, the process proceeds to step S804, and the estimated state is used instead of the final state.
If it is, wait until the program exits the routine and is settled.
One. On the other hand, in step S802, ECAS # 2
In some cases, the process proceeds to step S804 to check whether the state is the estimation state.
The processing after step S805 is performed according to the
The process proceeds to the process after step S812. Also,
Proceeded to step S804 in the confirmed state in step S803
In some cases, the process proceeds to step S805 and subsequent steps. First, the processing after step S805 will be described.
That is, when the process proceeds to step S805, the normal
Because the cylinder is determined regardless of the abnormality,
As can be seen from the time chart of FIG.
For spiral interrupt, three or two cam pulses are input.
BTDC interrupt after 97 °
The location information variable CCAS is set to 0. Next, the routine proceeds to step S806, where
Check if the counter is 3
When not, that is, when the Cam Seng counter is 2,
Is after the ignition of the # 2 cylinder, so the cylinder
Set the information variable RCAS to 3 and proceed to step S809,
When the sen counter is 3, it is after the ignition of the # 1 cylinder.
Therefore, in step S808, the cylinder information variable RCAS is set to 1
Proceed to step S809. In step S809, the updated crank position
Information variable CCAS, cylinder information variable RCAS, and cam
Cylinder / crank position again using the Sen counter as a parameter
The status data is read from the location status map CCHMAP, and
Bit 1 of the status data is 1
To see if it is. As a result, in step S809, the state
When bit 1 of the status data is 1 and the status is determined to be abnormal
Are the crank position information variable CCAS and the cylinder information variable RC
Assuming that the update result of the AS is an estimation that remains uneasy
In S810, set the error level ECAS to 1 and exit the routine.
If bit 1 of the status data is 0, indicating that the status is normal,
In step S811, the error level ECAS is set to 0.
Exit the routine. On the other hand, in the processing after step S812, the step
In step S812, the current crank position information variable CCAS (previous
Crank position information variable calculated by the number of classen interrupts
CCAS) is 2, that is, the change of the cylinder information variable RCAS
Check whether the current point is a transition point, and when CCAS = 2,
Proceeding from step S812 to step S813, the cylinder information variable R
CAS is incremented by 1, and the crank position information is obtained in step S814.
After setting the variable CCAS = 0, the process proceeds to step S817. On the other hand, in the above step S812, CCAS ≠ 2
In the case of, from step S812 to step S815
Check whether the Cam Sen counter is not 0,
If the sen counter is not 0, the above-mentioned step S813 is executed.
Branch to the step when the Cam Seng counter is 0
In S816, the crank position information variable CCAS is incremented by one,
Proceed to Step S817. In the step S817, the updated crank position
Information variable CCAS, cylinder information variable RCAS, and cam
Cylinder / crank position again using the Sen counter as a parameter
The status data is read from the
It is checked whether the status is normal or not.
And if it is in the normal state,
(The error level ECAS = 0) and exits the routine. Ma
In step S817, bit 1 of the status data is 1
If it is abnormal, the process proceeds to step S818, where the crank position
Update results of the position information variable CCAS and the cylinder information variable RCAS
Estimates error level ECAS as anxious estimate
Set to 1 and exit the routine. The above-described periodic interrupt processing every 0.5 ms and
Control strategy on the user side by spiral interrupt processing
-Based jobs are prioritized, for example, 10 ms
The ignition timing setting routine during the
Ignition timing according to engine operating conditions such as engine speed
When the indicated value (angle) IG_DEG is set,
Prepared on the OS side based on the indicated ignition timing IG_DEG
Ignition schedule in ignition schedule creation subroutine
Is created, and the ignition sequence is determined. The above indicated ignition timing IG_DEG
In the range of -60 ° to + 97 ° with the retard side negative from the dead point
It can be set, and when determining the ignition sequence,
Set the ignition interval variable using the rank position variable, and
The ignition based on the section indicated by the fire section variable
Create a schedule. The ignition section variables are as shown in FIG.
To the ignition coil 26a using the cylinder information variable RCAS.
Ignition indicating the target cylinder to be energized and ignited
Cylinder information variable IGRCAS, crank position information variable CC
The end of energization, that is, the section where ignition is performed using AS
Indicating ignition crank position information variable IGCCAS, crank
The position information variable CCAS is used to communicate with the ignition coil 26a.
Dwell start crank position indicating the section where power should start
The information variable DWCCAS is the ignition crank position information.
The report variable IGCCAS takes the values 0, 1, and 2,
L start crank position information variable DWCCAS is Dwell
May enter the previous stroke prior to ignition,
-3, -2, -1, 0, 1, 2 (however, ignition
The value larger than the crank position information variable IGCCAS
Absent). Furthermore, the dwell start crank position information
In the section indicated by the variable DWCCAS,
Power supply start waiting time whether to start power supply after waiting for
That is, after the section where the energization starts,
Is the dwell-on wait time TD
W_ON, the ignition crank position information variable IGC
How long to wait in the section indicated by CAS
End wait time, that is, the point
After the section where the fire is executed, turn off the power to the ignition coil.
The time until disconnection is determined by the dwell-off wait time TDW_OF.
Show. The section data of the start and end of energization
Data and the time data of the energization start wait time and energization end wait time.
Data and create an ignition schedule every 10 ms
You. That is, as shown in FIG.
L start crank position information variable DWCCAS, 2 bytes
Dwell time TDW_ON above 1 byte
The ignition crank position information variable IGCCAS, 2 bytes
The dwell-off waiting time TDW_OF as a member
Predetermined memory area using structure variables as ignition schedule
To record. In this case, the ignition schedule
6 bytes each from offset address +0, +6, +12
Three ignition schedules IGSCD in the memory area
L1, IGSCDL2 and IGSCDL3 are stored
According to the schedule pointer described later.
What is the schedule for creating an ignition schedule during a 10 ms job
And the classend interrupt
Used in the ignition timer set. In this case, one
Schedule change during the ignition sequence
The latest schedule will be
Adopted. Conventionally, an instruction value of the ignition timing is set, and
The ignition sequence is determined based on the
A series of processing of setting to Ma
At high engine speed due to heavy load
However, in the present invention, 10 m
Create an ignition schedule for each ignition schedule.
Set the ignition timer at the class interrupt according to the
The load does not increase even at high engine speeds.
Therefore, accurate ignition control can be performed. Next, the preparation of the ignition schedule will be described.
The description will be made according to the flowcharts of FIGS.
You. In this ignition schedule creation subroutine,
First, in step S1200, set on the user job side
The indicated dwell time ITDWL for half rotation time MTCS1
8 limit the ignition plugs assigned to each cylinder.
The two ignition coils are energized at the same time for the
And limit the value to the actual dwell time TDWL
And data on the duration of energization of the ignition coil 26a.
At a predetermined address of the RAM 60. Next, the process proceeds to step S1201, and the processing is delayed.
Apparent dwell time D_T including time
DWL, and corresponds to the processing delay time in step S1202.
Let the waste angle be DM_DEG. This processing delay time
The ignition timer is actually set after the class interrupt occurs.
This is the processing delay time until the ignition
Maximum value of processing delay time in Imaset subroutine
Is recorded. Next, steps S1202 to S12 are performed.
Proceed to 03 and check if error level ECAS is not zero
That is, whether the cylinder and crank positions have been determined
Check if the cylinder and crank position are ECAS ≠ 0
If not determined, the routine exits and ECAS =
If it is 0, the process proceeds to step S1204, where a new schedule
The pointer to the X register. The schedule pointer has a 10 ms interval.
Job schedule pointer IGSCUS,
Schedule pointer IGS used for classain interrupt
There are CPTs, and all take values of 0, 6, and 12.
And the currently running ignition adopted by Classen Interrupt
Schedule pointer IGSCPT indicating the schedule
And the schedule when the ignition schedule was created last time
Logical OR with the pointer IGSCUS
The schedule value shown in FIG.
Search the inter-table IGSTBL and find the three ignition schedules
Joule IGSCDL1, IGSCDL2, IGSCD
Of L3, the ignition schedule for newly writing
select. For example, the currently executed ignition schedule
Pointer IGSCPT is 0 (ignition schedule
IGSCDL1) and the ignition schedule created last time
Pointer IGSCUS is 6 (ignition schedule I
GSCDL2) corresponds to the logical sum 6 of 0 and 6.
Of the schedule pointer table IGSTBL
The ignition schedule IG where the data should be written next
Pointer value 12 specifying SCDL3 is stored
And 12 is X as a new schedule pointer.
Stored in register, ignition schedule IGSCDL
3 is written, then the schedule
Is stored in the pointer IGSCUS. That is, the ignition schedule is two.
And at high engine speeds, classan interruptions are frequent
Data for ignition schedules that are not
Next class interrupt while rewriting data in 10ms job
Can occur and adopt new ignition schedule
Disappears. Not used at low engine speed
Even after rewriting the ignition schedule data,
Schedule for next data rewrite without interrupt
Becomes the schedule being adopted. Because of this,
Ignition created every 10ms with 3 fire schedules
Schedule data for asynchronous classene interrupt
It allows them to pass smoothly. Thereafter, the steps S1204 to S1204 are repeated.
Proceeding to 1205, ignition is commanded before BTDC 10 °
In order to check whether or not the ignition timing IG
_DEG is subtracted and the difference is stored in accumulator A,
In step S1206, the contents of accumulator A and the processing delay
A comparison is made with the dead angle DM_DEG corresponding to time. So
As a result, A <DM_DEG, and the processing delay time is included.
If the ignition is before BTDC10 °, the label
Proceed to the processing of step S1300 and subsequent steps indicated by IGS10
A, DM ≧ DEG, and B including processing delay time
When the ignition is between TDC10 ° and ATDC83 °
Proceeds to step S1207. In the step S1207, the accumulator A
Limit the content at 70 and ignite after ATDC 60 °
Is performed, and in step S1208, before half a rotation
Dwell time TDW_ based on the classen interval of
Calculate OF. Specifically, the classen interval table M
The section from TCSX to BTDC10 ° to ATDC83 °
Crank value corresponding to the value 2 of the crank position information variable CCAS
Reads the spiral interval and stores the contents of accumulator A as CCA
The value obtained by dividing by the crank angle value 93 in the section of S = 2 is read out.
And multiply it by the new Accumley interval.
The contents of data A. And this new accumulator
Since the content of A is the dwell-off waiting time TDW_OF,
is there. That is, the rotation of the engine is globally
Because it fluctuates in a half rotation cycle, the latest class in the same measurement section
Calculates dwell-off waiting time TDW_OF using sen interval
To achieve steady rotation fluctuations at each crank angle.
Eliminate the errors, combustion intensity, flywheel weight,
Being unaffected by gear ratio, piston weight, etc.
It is possible to set an accurate ignition. Next, steps S1208 to S12 are performed.
Going to 09, the section between BTDC10 ° and ATDC83 °
The value of CCAS = 2 is stored in accumulator B.
The contents of this accumulator B are
Report variable IGCCAS, and in step S1210,
Of the accumulator A, that is, the dwell-off waiting time TDW
_OF and apparent dwell time D_TDWL
You. A> D_TDWL and the same section
When dwell start is possible between steps S1210 and
Processing after step S1460 indicated by label IGS90
Branch to A ≦ D_TDWL, and dwell in the same section
If it is not possible to start
When the content of the accumulator B is subtracted by 1, step S1212
Then, the contents of the accumulator A are set to IGCCAS = 1.
A value obtained by adding the classen interval of the corresponding previous section,
Processing after step S1350 indicated by label IGS15
Proceed to. On the other hand, in step S1206, A <DM_
DEG, BTDC 10 ° including processing delay time
The previous ignition is instructed and the process proceeds to label IGS10 and later.
If it has proceeded, at step S1300, BTDC 65 °
65 to check if ignition has been commanded before
Accumulate the difference by subtracting the instruction ignition timing IG_DEG from
And store it in the accumulator in step S1301.
Data A and the dead angle DM_D corresponding to the processing delay time
EG, A <DM_DEG, processing delay
When the ignition before BTDC 65 ° including the interval
Is to check if the ignition is before BTDC 97 °
Further, after step S1400 indicated by the label IGS20
And then A ≧ DM_DEG, processing delay time
Including between BTDC 65 ° and BTDC 10 °
If there is, the process proceeds to step S1302. In step S1302, BTDC 65 ° -1
Value 1 of crank position information variable CCAS indicating 0 ° section
Read from classen interval table MTCSX corresponding to
CCAS contents of accumulator A
= 1 divided by the crank angle value 55 in the section
The contents of Tana Accumulator A and this new accumulator
Let the contents of the radiator A be a dwell-off waiting time TDW_OF.
You. Then, in step S1303, the value of CCAS = 1 is added.
Store in accumulator B, and in this accumulator B
As the value of the ignition crank position information variable IGCCAS
Proceed to step S1350. Steps S1350, S1351, and S1352 are as described above.
This is the same process as steps S1210, S1211, 1212,
Judge whether dwell start is possible between
If you can start the Lell,
Branching to the next section and cannot start dwelling in the same section
Is the dwell-off waiting time TDW_OF of the section immediately before
This is a process of adding the classen interval to a value. That is, in step S1350, the accumulate
Data A, that is, dwell-off waiting time TDW_OF
And the apparent dwell time D_TDWL, and A>
In the case of D_TDWL, the label IGS starts from step S1350.
The processing branches to processing after 90, and when A ≦ D_TDWL,
In step S1351, the content of accumulator B is subtracted by 1 (B
= 0), in step S1352, the contents of accumulator A
Corresponds to the ignition crank position information variable IGCCAS = 0
Label IG as the value obtained by adding the classen interval of the section
The process proceeds to the process after step S1450 shown in S25. On the other hand, the step indicated by the label IGS20
In the processing after step S1400, in step S1400, the BTDC 9
Check if ignition is commanded before 7 °
Therefore, subtract the instruction ignition timing IG_DEG from 97 to obtain the difference.
Stored in accumulator A, and in step S1401,
Of the accumulator A and the dead angle corresponding to the processing delay time
Compare with DM_DEG. In step S1401, A <DM
_DEG, BTDC 97 ° including processing delay time
If the ignition is earlier than the above, from step S1401
The process branches to step S1402 to process the contents of the accumulator A.
Maximum as the dead angle DM_DEG corresponding to the delay time
After restricting the advance angle, proceed to step S1403, and proceed to step S14.
01, A ≧ DM_DEG, including processing delay time
When ignition is between BTDC 97 ° and BTDC 65 °
To step S1403. In step S1403, BTDC 97 ° -6
Value 0 of crank position information variable CCAS indicating a 5 ° section
Read from classen interval table MTCSX corresponding to
CCAS contents of accumulator A
= 0 and multiplied by the value obtained by dividing the crank angle value by 32.
The contents of Tana Accumulator A and this new accumulator
Let the contents of the radiator A be a dwell-off waiting time TDW_OF.
You. Next, the flow advances to step S1404, where CCAS
= 0 is stored in accumulator B, and this accumulator
The content of the radiator B is used as the ignition crank position information variable IGCCA.
The process advances to step S1450 as the value of S. Step S1450 or later
The processing of step S1210, S1211, S1212 and step S1210
As in S1350, S1351, and S1352, dwell starts in the same section.
Judge whether it is possible or not and start dwell in the same section
Sometimes, the process branches to the process after Label IGS90, and
Wait for dwell off if dwell cannot be started in section
Add the classen interval of the previous section to the time TDW_OF
It is the repetition of the process of setting the calculated value. That is, in steps S1450, S1451, and S1452,
Processing, processing of steps S1453, S1454, S1455, step S14
In the processing of 56, S1457, and S1458, A ≦ D_TWDL and
When not branching to the bell IGS 90, the accumulator B
The contents are reduced in order of B = -1, B = -2, B = -3
The section is moved forward one by one, and the dwell-off waiting time TDW_O
Extend F one after another. After steps S1456 to S1458, the space
The content of the accumulator B reaches -3, and in step S1459, A
> D_TDWL, the label is read from step S1459.
Proceed to step S1460 of the IGS90, and A ≦
In the case of D_TDWL, from step S1459 to step S1459
Proceeding to 1461, processing the contents of accumulator A to delay time
To step S1462. In the step S1460 of the label IGS90,
Calculate back from the dwell time TDW_OF
Accumulation time to calculate the waiting time TDW_ON
The contents of data A, that is, dwell-off waiting time TDW_OF
Subtract the actual dwell time TDWL from the
Then, the process proceeds to step S1462. Then, in step S1462, the accumulate
The contents of data A are set as dwell-on wait time TDW_ON,
In step S1463, the contents of accumulator B are deleted.
As the value of the start crank position information variable DWCCAS
After rewriting the fire schedule, step S1464
To the schedule pointer IG
Save to SCUS and exit the routine. The above ignition schedule is set every 10 ms.
When set, the ignition timer is set during classen interrupt.
Is done. This ignition timer operates as shown in FIG.
Output pattern of mode M1 or output pattern of mode M2.
It operates in a turn, and in the mode M1, the initial value T1 and the reload
When the timer value is set to T2 and started, the time
When T1 has elapsed, the output goes low (ignition coil non-
High) (ignition coil energization)
It goes low after the passage of T2, while in mode M2,
The initial value T3 and the reload value FFFF (time not specified)
Set the timer to timer when the output is high level.
Output, the output goes low after the time T3 has elapsed.
Become. [0176] In this case, in a normal classene interrupt,
Set dwell start time and dwell time in mode M1
The normal energizing sequence is adopted,
The ignition time interval becomes shorter,
While the ignition coil 26a is energized,
When a fire zone is reached, the dwell-off time is set in mode M2.
An energizing sequence to cut power is adopted. This energizing sequence is based on the engine speed.
Height, dwell time, sudden change in rotation speed, sudden ignition timing
Interrupt processing at the end of ignition described later.
From the latest ignition schedule to the current energization state
Is checked to determine if the next dwell should be started immediately.
Separately, one of two types of energizing sequences
Is selected. And the ignition timer at classen interruption
The energizing sequence is determined in the set subroutine.
And the ignition timer is set according to the energization sequence.
You. First, the ignition timer set subroutine
Will be described according to the flowcharts of FIGS. 1 and 2.
I do. In this ignition timer setting subroutine,
In step S1500, whether the error level ECAS is 2
No, that is, the cylinder and crank positions are determined.
It is checked whether the state is unknown and ECAS = 2
In the case of, the routine exits as it is and ECAS $ 2
When the process proceeds to step S1501, the ignition timing non-setting flag
Check whether IGTMNS is set. The ignition timing non-setting flag IGTMNS
Does not affect the ignition timer in the ignition end interrupt described later.
Time is set, and dwell-off time is set.
The dwell is started without being set and the ignition timing is not
This is a flag that indicates the setting status.
In step S1501, the ignition timing unset flag is set
When the ignition coil 26a is energized, the label
The process proceeds to step S1530 and subsequent steps indicated by TENS30.
Waiting for dwell-off time → communication by ignition mode M2
Set the ignition sequence to the ignition timer, and set the ignition timing
If the lag is not set, the above step S150
The process proceeds from step 1 to step S1502. In step S1502, at the time of ignition
From the latest ignition schedule adopted in the interrupt
Dwell start crank position information variable DWCCAS read out
The horizontal axis indicates the dwell start section based on the indicated value, and the crank overall position
Energization state map IGCTB with the variable ACAS as the vertical axis
L. The energization state map IGCTBL indicates that the ignition
The schedule represents a common ignition sequence for each cylinder.
On the other hand, as shown in FIG.
Variable ACAS and dwell start crank position information variable D
WCCAS or ignition crank position information variable IGCC
Ignition for each cylinder at a certain point in time based on the indicated value of AS
The energization state of the coil 26a is represented by a 1-byte map value.
It was done. A map of the above-mentioned energization state map IGCTBL
As for the value, the upper 4 bits are now delayed by the value F and once by the value F.
The value E indicates a delay situation of two delays, and the lower 4 bits
Is a cylinder information variable RCA as data indicating the cylinder to be energized.
S, adopted as ignition cylinder information variable IGRCAS
Is done. For example, the dwell start crank position information variable DW
CCAS is -1 and the current crank position comprehensive variable ACAS
Is 3, the map value is F1, which is the RCA
S = 1, that is, the section in which the dwell for cylinder # 3 is immediately before
Indicates that it should have started with Also, for example
If the ignition crank position information variable IGCCAS is 2 and
If the total crank position variable ACAS of 11 is 11,
The loop value is 03, which is RCAS = 3, ie, # 4
Cylinder ignition should take place in the current section
And As a result, the current section should be
The energized state can be determined efficiently, and
Suppress increase in memory capacity and decrease in processing speed due to complication
Because accurate and high-speed ignition control can be performed
is there. Thereafter, the steps S1502 to S1502 are repeated.
When proceeding to 1503, refer to the above-mentioned energization state map IGCTBL
From the result, it is determined whether it is the current dwell start section or not.
If it is not the start section, exit the routine and start dwell
If it is a section, the process proceeds to step S1504, where the ignition
Timer operation flag FL indicating that the timer is operating
Refers to G_IG to determine whether the timer has expired.
If the timer has not expired, exit the routine,
When the timer has expired, in step S1505, the ignition cylinder
Determine the information variable IGRCAS and label it with TENS70
Proceed to the processing after step S1570 shown, and wait time
→ Dwell on → Dwell time → Communication by ignition mode M1
Set the ignition sequence to the ignition timer. Next, the mode M after the label TENS30
Set the ignition timer according to 2 and the label TENS7
Set ignition timer in mode M1 after 0
explain. First, after the label TENS30, the steps
In step S1530, the ignition crank position
The horizontal axis indicates the ignition interval according to the indicated value of the
The energization state map is set with the rank total position variable ACAS as the vertical axis.
With reference to the IGCTBL, in step S1531, the current ignition
Check if it is not between. And when it is not the ignition section
Exits the routine, and during the ignition interval, step S1531
From step S1532, and stores the value F in the accumulator B.
The FFF is stored, and in step S1533, the ignition timer is output.
The force pattern is set to mode M2. Next, the routine proceeds to step 1534, where the ignition schedule
Against the dwell-off waiting time TDW_OF read from the
Subtract the current processing delay time and accumulate the value.
Stored in data A, the accumulative
Check that the contents of data A are positive and normal.
You. In step S1535, if A> 0,
If it is normal, the process proceeds from step S1535.
Proceed to step S1580, and accumulator A contents are sorted by cylinder.
The new content is obtained by adding the retard time of. This cylinder
Another retard time is cylinder specific for a 50ms job
Is converted from retard angle to retard time.
When the ignition timer is set during this classen interrupt,
Calculating the retard for each cylinder very easily.
Can be. Thereafter, the flow advances to step S1581 to add a new address.
Contents of accumulator A, that is, retard time for each cylinder
The dwell-off time obtained by adding
In step S1582, the contents of accumulator B are reloaded by timer
As the value, the ignition timer is started in step S1595.
Let That is, when the ignition coil is energized,
From the interrupted classen interruption, the dwell of the ignition schedule
Reduce the current processing delay time from the off wait time TDW_OF
Calculated that the retard time for each cylinder has been added.
The output of the ignition timer changes from high level to low level.
Thus, ignition (dwell-off) is performed. In this case,
After the ignition timer output goes low,
Since the reload value is set to FFFF,
Continue the bell state. After starting the ignition timer,
Proceed to step S1596 to indicate that the timer is running
Therefore, if the flag FLG_IG during the timer operation is set,
In step S1597, an ignition timing non-setting flag IGTMNS
And exit the routine. On the other hand, in step S1535,
Of the accumulator A, that is, the dwell-off waiting time TDW
The value obtained by subtracting the current processing delay time from _OF
When the condition of A ≦ 0 is reached, the ignition timer
Cannot be set to a negative time, the above step S153
Branching from 5 to step S1590, the timer initial value is set to 0,
In step S1591, the contents of accumulator B are reset by timer.
The process proceeds to step S1592 as the load value. At step S1592, the current processing delay time
To determine whether or not exceeds the recorded value ICTIME.
If not exceeding CTIME, in step S1594
Set the error flag and exceed the recorded value ICTIME
If yes, update the processing delay record in step S1593
After rewriting the maximum value of the recorded value ICTIME,
The error flag is set in step S1594, and the
Exit the routine after 5 to S1597. The above recorded value ICTIME is determined by the following ignition schedule.
This recorded value ICTIME is used when creating joules.
By taking into account the processing delay time due to
Make sure that no errors occur again with the fire timer set.
Can be. Next, the processing after the label TENS70 will be described.
In step S1570, the output of the mode M1 is described.
The pattern is set, and in step S1571, the ignition
The drive circuit in the igniter 27 corresponding to the file 26a is selected.
Select distributor on logic to select
You. Next, the routine proceeds to step S1572, where the ignition schedule
Dwell-on waiting time TDW_ON read from Joule
The current processing delay time is subtracted from the
When stored in the murator A, the process proceeds to step S1573,
Store actual dwell time TDWL in accumulator B
You. Then, steps S1573 to S
Proceed to 1574, and the contents of accumulator A,
The TDW_ON is a positive value and checks if it is normal.
When A> 0, the process proceeds to step S1580 described above,
After steps S1580, S1581, and S1582, accumulator A
New contents that add retard time for each cylinder
To the timer initial value, and the contents of accumulator B
Ignition using actual dwell time TDWL as timer reload value
The timer is started, and the above steps S1595, S1596, S1
Exit the routine via 597. That is, at the time of classan interruption, the ignition timing
Unset flag IGTMNS is not set and ignition
When the coil 26a is not energized, the energized state map
Judgment of the current classen interrupt status from IGCTBL
If the current classen interrupt is in the dwell start section,
Dwell-on waiting time TDW_ON of fire schedule
Subtract the current processing delay time to get the retard time for each cylinder.
Set the added time in the ignition timer, and after the set time elapses
The output of the ignition timer from low to high
The energization of the ignition coil 26a is started, and the actual dwell time T
After the DWL has elapsed, the energization is terminated and ignition is performed.
is there. In step S1574, if A ≦
When the value is 0, the above-described steps S1574 to S
Proceed to 1590 or later. Similarly, set the timer initial value to 0, accumulate
Current processing using the contents of the lator B as the timer reload value
Process when the delay time exceeds the recorded value ICTIME
Update the delay record. According to the ignition timer setting subroutine described above,
When the ignition timer is set and ignition is performed,
The interruption at the end of ignition shown in FIG. 6 occurs. In this ignition end interruption, first,
In step S1600, it is checked whether or not the dwell is off.
When not in the off-state, the interrupt ends and the dwell-off
Only when the process proceeds to step S1601 and thereafter, a predetermined process is performed.
Now. That is, in step S1601, the ignition timer
Is stopped and cleared, and in step S1602, the timer
When the moving flag FLG_IG is cleared, step S160 is performed.
Go to 3 and go to the ignition schedule creation subroutine
To indicate the latest ignition schedule used in
The value of the joule pointer IGSCUS
Copy to the Inter IGSCPT
Address of the address specified by the IGSCPT
Adopt an ignition schedule. Next, the process proceeds to step S1604, and the ignition schedule
Joule dwell start crank position information variable DWCCA
S and the current crank overall position variable ACAS
From the energization state map IGCTBL
Read out the lower 4 bits from the current ignition cylinder information variable IG
The RCAS is examined, and in step S1605, the current ignition cylinder is
Check whether the information variable IGRCAS has the same value as before
Find out. As a result, the current ignition cylinder information variable IGR
When the CAS is the same as before, the same cylinder is pointed again
Since there is no need to fire, the interrupt is terminated and the current ignition
When the cylinder information variable IGRCAS is different from before,
The process proceeds from step S1605 to step S1606, where the ignition cylinder
Update the information variable IGRCAS and proceed to step S1607.
No. In step S1607, the ignition cylinder information variable I
GRCAS value from dwell point of view and ignition point of view
By checking whether the values seen from
Whether the situation requires immediate dwelling
Is determined. Here, the cylinder information from Dwell's point of view
RCAS DWL (= IGRCAS), from the viewpoint of ignition
When the viewed cylinder information is represented by RCASIG, as shown in FIG.
Cylinder information RCAS from a dwell perspective
DWL (= IGRCAS) becomes the next
The ignition target cylinder is indicated by a constant value until the
Cylinder data RCAS from the viewpoint of ignition
IG has the same value as the cylinder information RCASDWL for the same cylinder.
The current supply end section and then the next power supply end section.
This is data indicating the cylinder to be ignited at a constant value until the ignition is stopped. So
No need to start dwell with ignition off
Both match only in the section. That is, this ignition end interrupt has occurred.
At the end of ignition, RCASDWL ≠ RCASIG
If the end of coil energization and the start of energization are in the same section,
Abrupt changes in engine speed, ignition timing, etc.
Immediately after the ignition of one cylinder ends, the dwell of the next cylinder is opened.
It can be seen that the section has to start. Therefore, in step S1607, the ignition cylinder
Information variable IGRCAS (= RCASDWL)
If the same value as RCASIG, the ignition coil is turned off.
And the start of energization are not in the same section,
Terminate the interrupt separately and, as described above,
Wait for the next dwell start section every time
Wait time → dwell on → dwell time → ignition
Set the energization sequence to the ignition timer. [0209] In step S1607, the ignition cylinder information is set.
Report variable IGRCAS is different from the value RCASIG seen from ignition.
When the ignition coil is turned off,
A condition in which the dwell must start immediately
Condition and the ignition timer set after step S1608.
Waiting time → energizing only dwell-on
Set the sequence to the ignition timer. That is, in step S1608, the logic
Select the distributor in step S1609.
When the initial value is set to 256, in step S1610, the timer
Let the reload value be FFFF. Note that the initial value of the timer is 25.
Reference numeral 6 indicates a rotation signal from the primary terminal of the ignition coil 26a.
Reliable counting when using a tachometer that backs up
Off period of 1 ms to allow
When a meter is used, the characteristics of the ignition coil 26a
Any setting may be made. Then, steps S1610 to S
Proceed to 1611 and change the output pattern of the ignition timer to mode M1.
Then, in step S1612, the ignition timer is started.
In step S1613, the timer operation flag FLG_IG is set.
Then, in step S1614, dwell has started
Nevertheless, dwell-off, that is, ignition timing is set
Ignition timing unset flag IGTM indicating that ignition has not been performed
NS is set and the interrupt is terminated. Thus, the off period of 1 ms after the end of ignition
Dwell starts after a while, and fires every classen interruption
When the ignition section is reached after waiting for the section to be
Dwell off time → ignition energization sequence is set to ignition timer
Set. [0213] As described above,Claim 1invention
According toClan representing multiple specified crank positions
Input a pulse to specify
A certain number of cam pulses for cylinder discrimination between crank pulses
Input based on the input pattern of these pulses.
As well as grasping the rank position and performing cylinder discrimination,
The interval is set for each input of the link pulse, and the interval
Set the time from the start position to the ignition timer and set the ignition coil
When performing ignition control by turning on and off the engine, the engine
The process for each crank pulse input synchronized with the rotation
The section that indicates the cylinder and crank position is the preset ignition
It is determined whether or not the section according to. And for ignition
When this section is reached, the setting is made based on the engine operating condition.
From the specified ignition coil energization / interruption time,
Processing from input of input to actual setting of ignition timer
Set the value obtained by subtracting the delay time in the ignition timer, and
Fires and treats from ignition coil energization / interruption time
The current processing when the value obtained by subtracting the delay time is negative
Determines whether the delay time exceeds the processing delay time record value.
Refuse. And the current processing delay time exceeds the recorded value
, The processing delay time record value according to the current processing delay time
Is updated and the recorded value is processed at the next ignition timer setting.
Since it is used as the delay time,
Until the ignition timer is actually setProcessing delay time
When it becomes longer than usual,SometimesWhen processing is delayed
whileUpdate the processing delay time record value byNext ignition tie
Used for masset,Eliminate the effects of processing delays and always
Ignition can be performed at the right time, and the engine output
Improving performance and improving exhaust gas emissions
Excellent effects can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial flowchart 1 of an ignition timer set subroutine. FIG. 2 is a partial flowchart 2 of an ignition timer set subroutine. FIG. 3 is a flowchart of a periodic interruption process every 0.5 ms. FIG. 5 is a flowchart of a job priority subroutine. FIG. 6 is a partial flowchart 1 of a job execution subroutine. FIG. 7 is a partial flowchart 2 of a job execution subroutine. FIG. 8 is a partial flowchart 3 of a job execution subroutine. FIG. 10 is a flowchart of a crank position calculation subroutine. FIG. 11 is a flowchart of a CCAS / RCAS determination subroutine. FIG. 12 is a partial flowchart 1 of an ignition schedule creation subroutine. FIG. 14 is a partial flowchart 3 of the ignition schedule creation subroutine. FIG. 15 is a partial flowchart 4 of the ignition schedule creation subroutine. FIG. 16 is a flowchart of an ignition end interruption process. FIG. 18 is an explanatory diagram showing an execution state. FIG. 18 is an explanatory diagram of a job flag. FIG. 19 is an explanatory diagram of a crank position variable. FIG. 20 is an explanatory diagram showing changes in a job execution flag and an overlap counter. FIG. 22 is an explanatory diagram of a classen interval table. FIG. 23 is an explanatory diagram of a cylinder / crank position state map. FIG. 24 is an explanatory diagram of an ignition sequence and an ignition section variable. 26: Description of the schedule pointer table [FIG. 27] FIG. 28 is an explanatory diagram of a fire timer set. FIG. 28 is an explanatory diagram of an energization state map. FIG. 29 is an explanatory diagram showing a relationship between power-carrying cylinder information and ignition cylinder information. 31: Schematic configuration diagram of an engine system. FIG. 32: Front view of a crank rotor and a crank angle sensor. FIG. 33: Front view of a cam rotor and a cam angle sensor. FIG. 34: Circuit configuration diagram of an electronic control system. Engine 50 ECU 26a Ignition coil TDW_ON Dwell-on waiting time (energization time) TDW_OF Dwell-off waiting time (cutoff time) ICTIME Recorded value of processing delay time (maximum value)

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F02P 5/15 F02D 45/00 F02D 43/00

Claims (1)

(57) [Claim 1] A class representing a plurality of specified crank positions.
Input a crank pulse, and
A certain number of cam pallets for cylinder discrimination between certain crank pulses
Input, and based on the input pattern of these pulses,
As well as grasping the crank position and performing cylinder discrimination,
A section is set for each rank pulse input, and a section related to ignition
Set the time from the start position of the ignition
Ignition of an engine that controls ignition by turning on and off the oil
In control, processing for each crank pulse input synchronized with engine rotation
The section indicating the current cylinder and crank position is set in advance.
It is determined whether the section has reached the set ignition
When this section is reached, the setting is made based on the engine operating condition.
From the specified ignition coil energization / interruption time,
Processing from input of input to actual setting of ignition timer
Set the value obtained by subtracting the delay time in the ignition timer, and
Fire is performed, and the processing delay time is subtracted from the ignition coil energization / cutoff time.
When the subtracted value becomes negative, the current processing delay time is processed.
Judge whether or not it exceeds the record
When the processing delay time exceeds the recorded value, the current processing delay
Update the processing delay time record value according to the time, and
A method for eliminating a processing delay in ignition control of an engine , wherein the processing delay is used as a processing delay time at the time of setting an ignition timer .