JP4457969B2 - VEHICLE CONTROL METHOD AND ELECTRONIC CONTROL DEVICE - Google Patents

Description

  The present invention is a vehicle control method that is particularly useful for idle stop control, and updates the control information held by itself through communication with other in-vehicle electronic control devices, and performs idle stop control based on this control information. The present invention relates to an electronic control device to be executed.

  As is well known, idle stop control is performed in order to consciously stop ignition, fuel injection, exhaust, etc. during idling so as not to cause idling rotation when the vehicle stops for a short time, and to minimize fuel consumption.

Conventionally, as a vehicle control method related to such idle stop control, for example, a method described in Patent Document 1 is known. Specifically, in such a method, an idling of an electronic control device (engine control device) that controls an ignition mode and a fuel injection mode of an in-vehicle internal combustion engine, and a starter device that drives the engine from the outside and rotates it by itself. An electronic control device (idle stop control device) that controls the stop operation communicates with each other and updates control information held by the electronic control device as needed. Then, based on the state of the vehicle indicated by the control information held by each of these electronic control devices, the above-described idle stop control is appropriately executed under the cooperation (cooperation) of these electronic control devices. It has become so.
JP 2004-137905 A

  By the way, in such a system in which the engine control device (engine control ECU) and the idle stop control device (idle stop control ECU) cooperate (coordinate) to perform the above-described idle stop control, these electronic control devices Control information is transmitted and received between the two. More specifically, each of these electronic control devices performs desired control based on this control information while updating its own control information with control information sent from the other electronic control device. ing. For this reason, when reset occurs in only one of these electronic control devices, the control information between the two becomes inconsistent, and desired control such as starting (starting) control of the internal combustion engine is not performed correctly. There is concern.

  A specific example will be described. In these electronic control devices, as shown in FIG. 19, for example, whether or not the current vehicle state is in the idle stop state (“IdleStop” or “non-IdleStop”). The control information shown is held in each, and this is updated as needed with communication between the two, as shown in FIGS. Here, for example, when the vehicle is in an idle stop state, an unintentional reset (reset release) based on the power cutoff occurs in the idle stop control device due to a power supply decrease during cranking (engine start) or the like. As shown by a broken line arrow in FIG. 19, the control information held in the idle stop control device is initialized (initialized). That is, the control information held in the apparatus is updated by initial data (initial value prepared in advance for initialization), and as shown in FIG. 20B, “non-idle stop state (RUN)” Will come to show. On the other hand, the control information held in the engine control device still indicates the “idle stop state (STOP)” as shown in FIG. 20 (c). In this example, there is a mismatch between these devices in the control information indicating whether or not the current vehicle state is in the idle stop state.

  The present invention has been made in view of such circumstances, and is based on accurate control information without causing inconsistency of control information even when the electronic control device is reset based on an unintended power shutdown. It is an object of the present invention to provide a vehicle control method and an electronic control device capable of appropriately performing desired vehicle control.

In order to achieve such an object, according to the first aspect of the present invention, the first and second electronic control devices mounted on the vehicle communicate with each other to update the control information held by the first and second electronic control devices. As a vehicle control method for performing desired vehicle control in cooperation with the first and second electronic control devices based on the state of the vehicle indicated by the control information, the first and first The electronic control device 2 controls the ignition mode and the fuel injection mode in the internal combustion engine mounted on the vehicle, respectively, and drives the internal combustion engine mounted on the vehicle from outside to rotate it by itself. an electronic control apparatus for controlling the idle stop operation of the starter device, when the desired vehicle control which is is idle stop control of the internal combustion engine mounted on the vehicle, before Each of the first and second electronic control devices includes a backup RAM that is always powered by a battery mounted on the vehicle and backs up the control information including information indicating whether or not the battery is removed from the vehicle. A reset based on power interruption occurs in one of the first and second electronic control devices, and information indicating whether or not the battery has been removed from the vehicle is that the battery has not been removed from the vehicle. When the control information is displayed, the reset information is backed up in the backup RAM of the other electronic control unit where the reset has not occurred without performing the update process with the initial data prepared in advance for initialization. The backup data just before is stored in one electronic control unit where the reset occurred. It will be used as the control information.

If such a method is adopted as a vehicle control method, initial data (initial data prepared in advance for initialization) is generated with respect to the control information when a reset (reset release) that does not result from the removal of the battery from the vehicle occurs. Value) is not updated. In addition, appropriate control information is held in the electronic control device by the backup data immediately before the occurrence of the reset. That is, according to such a method, even when a reset based on an unintended power interruption occurs in the electronic control device (a reset not caused by the battery being removed from the vehicle), the control information is incorrect due to the initialization. Appropriate control information is securely held in the device without being overwritten with information, and as a result, the desired vehicle control based on accurate control information is properly performed without causing the above-described mismatch of control information. It becomes possible to do. Further, for example, when preparing a backup RAM that is constantly powered by a battery mounted on the vehicle as a medium for holding the control information in a nonvolatile manner, is the reset not caused by the removal of the battery from the vehicle? The determination as to whether or not can be made based on information indicating whether or not a battery serving as a power source for the backup RAM has been removed from the vehicle.
In addition, an electronic control device (idle stop control device) that controls the idle stop operation of the starter device mounted on the vehicle unintentionally shuts down due to a power drop during cranking (engine start), and thus unintended reset ( (Reset cancellation) is likely to occur. In other words, the idle stop control system using the idle stop control device and the engine control device is in an environment in which the above-described control information inconsistency is likely to occur among the various in-vehicle systems known in the past. In such an environment, a vehicle control method capable of appropriately maintaining and performing desired vehicle control is particularly desired. In this respect, according to the above-described method, such a demand is sufficiently satisfied, thereby greatly contributing to the development of the industry.

Further, in the method according to the claim 1, in the second aspect of the present invention, reset based on power cutoff to one occurs in the first and second electronic control unit, and the battery is removed from the vehicle information indicating whether or not within the time to indicate that the battery is removed from the vehicle, and to perform the update processing by the initial data prepared in advance for the initialization to said control information.

If such a method is adopted, when the generated reset is a reset that is assumed in advance (reset resulting from the removal of the battery from the vehicle) , the initial data (initial data ) with respect to the control information as usual Update processing (initialization) is performed using an initial value prepared in advance for conversion. That is, the control information is not initialized only when the generated reset is a reset that does not result from the battery being removed from the vehicle . Also in this case, as described above, appropriate control information is held in the electronic control device by the backup data immediately before the occurrence of the reset. As a result, even when the data (control information) stored in the backup RAM is erased, for example, when the vehicle battery is removed, the backup RAM is initialized (accurately with respect to the stored contents). As a result, appropriate data is held in the memory in a non-volatile manner, and appropriate vehicle control is continuously performed. As described above, when a reset to be initialized is assumed in advance, the above method is used to optimize the reset.

In addition, as described above, such idle stop control is performed to consciously stop ignition, fuel injection, exhaust, etc. during idling so as not to cause idling rotation when stopping for a short time, and to minimize fuel consumption. . Further, when the internal combustion engine is operated (restarted) again, it is necessary to start the engine. For this reason, in the method according to claim 1 or 2 , as the control information, as in the invention according to claim 3 , the stop condition of ignition / fuel injection in the internal combustion engine and the starter drive for the engine are determined. It is effective to employ a parameter including parameters related to the start condition. In addition, since these parameters need to be updated as needed through communication between the idle stop control device and the engine control device, the problem of inconsistencies in control information is particularly noticeable when using these parameters. become. Also in this sense, the above method as a vehicle control method is important.

Further, here, as parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine, the brake on / off of the vehicle according to the invention according to claim 4. A value determined according to at least one of a state, an accelerator opening / closing state of the vehicle, a turning state of the steering of the vehicle, a traveling speed of the vehicle, and a degree of inclination of the traveling road of the vehicle. It is particularly effective. The parameters listed here are particularly important in order to appropriately determine the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine.

Further, in the vehicle control method according to claim 3 or 4 , the parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine are the invention according to claim 5. As described above, it is more effective to set the value in accordance with the on / off state of the ignition switch that is turned on / off as the ignition / start switch of the internal combustion engine. By setting the parameters to such parameters, more reliable control reflecting the intention of the driver (user) is realized as the above-described idle stop control.

Further, in the vehicle control method according to any one of claims 3 to 5 , the parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine are the claims. As described in the sixth aspect of the invention, it is more effective that the value is determined according to the value of the parameter relating to the idle stop prohibition condition of the internal combustion engine. For example, depending on the condition relating to the internal combustion engine (particularly its state), the condition relating to emission, the condition relating to the battery of the vehicle, etc., it may not be preferable for the internal combustion engine to enter the idle stop state itself. In this regard, according to the above-described method, it is possible to prohibit the engine from being idle-stopped under a desired condition. Therefore, it is possible to flexibly cope with such a case and perform fine control.

Specifically, according to the invention described in claim 7 , the parameters relating to the idle stop prohibition condition of the internal combustion engine include the rotational speed of the internal combustion engine, the coolant temperature of the internal combustion engine, and the exhaust system of the vehicle. By optimizing the value of the catalyst according to at least one of the temperature of the catalyst provided in the vehicle and the remaining battery level of the vehicle, the above-described idle stop control can be optimized in a manner suitable for the actual situation. become.

Further, as by the invention of claim 8, in the control method for a vehicle according to any one of the claims 1 to 7, the second electronic control unit for controlling the idle stop operation of the starter device If at least the operation time of the starter device is backed up as the control information at any time, and this is kept non-volatile as the time during which the starter device was continuously operated, the operation time of the starter device is accumulated. Thus, it is possible to measure the time during which the starter device is continuously operated (time during which power is continuously supplied). That is, according to such a method, it is possible to monitor the continuous operation (energization) time of the starter device to prevent excessive energization of the starter device.

On the other hand, in the invention according to claim 9 , the first and second electronic control devices mounted on the vehicle communicate with each other to update the control information held by the first and second electronic control devices, and the control is held by each of them. based on the state of the vehicle indicated by the information, these original first and second cooperating electronic control unit, as an electronic control unit for an idle stock up control of the internal combustion agencies to be mounted on the vehicle, said first The first and second electronic control units respectively drive an electronic control unit for controlling an ignition mode and a fuel injection mode in the internal combustion engine mounted on the vehicle, and an internal combustion engine mounted on the vehicle from outside. an electronic control apparatus for controlling the idle stop operation of the starter device to be self rotation, the first and second electronic control unit, continuous power supply of the battery mounted on the vehicle Each of which has a backup RAM for backing up the control information including information indicating whether or not the battery has been removed from the vehicle, and a reset based on a power shutdown occurs in one of the first and second electronic control units When the information indicating whether or not the battery has been removed from the vehicle indicates that the battery has not been removed from the vehicle, the control information is updated with initial data prepared for initialization. And using the backup data immediately before the occurrence of the reset that is backed up in the backup RAM of the other electronic control unit in which the reset has not occurred as the control information in the one electronic control unit in which the reset has occurred. To do.

By adopting such a configuration as an electronic control device for controlling the idle stop operation of the starter device, the method according to claim 1 can be realized easily and accurately. That is, for example, when unintentional power cut-off due to power reduction during cranking (engine start) and eventually unintentional reset (reset release , that is, reset not caused by removal of the battery from the vehicle ) occurs. The control information is surely retained in the device without being rewritten by incorrect information by the initialization , and thus desired based on the accurate control information without causing inconsistency of the control information described above. The vehicle control is performed properly. Specifically, for example, as a medium for holding the control information in a nonvolatile manner, a backup RAM that is constantly powered by a battery mounted on the vehicle is provided, and whether or not the reset is not caused by the replacement of the battery. It is effective to make the determination based on whether or not a battery serving as a power source for the backup RAM has been removed from the vehicle.

In such an electronic control device, as in the invention described in claim 10 , one of the first electronic control device and the second electronic control device is reset based on power interruption, and the battery is removed from the vehicle. When the information indicating whether or not the battery has been removed from the vehicle, the control information is updated with initial data prepared in advance. As a result, even when the data (control information) stored in the backup RAM is erased, for example, when the vehicle-mounted battery is replaced, the backup RAM can be initialized (accurately with respect to the stored contents). As a result, appropriate data is held in the memory in a non-volatile manner, and proper vehicle control is continuously performed. If it is set as such a structure, the optimization will be achieved like the above-mentioned.

Further, the electronic control unit according to the claim 9 or 10 also, as the control information, such as by the invention of claim 11, the starter for the rest condition and the engine ignition and fuel injection in the internal combustion engine It is effective to employ a parameter including parameters related to the driving start condition. That is, these parameters are important in the electronic control device.

In this case, as in the invention according to claim 12 , the on / off state of the brake of the vehicle is used as a parameter relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine. In particular, it is preferable to employ a vehicle whose value is determined according to at least one of the opening / closing state of the accelerator of the vehicle, the turning state of the steering of the vehicle, the traveling speed of the vehicle, and the degree of inclination of the traveling road of the vehicle. It is also effective as described above.

According to a thirteenth aspect of the present invention, in the electronic control device according to the eleventh or twelfth aspect of the present invention, the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine are related. The parameter is determined according to the on / off state of the ignition switch that is turned on / off as the ignition / starting switch of the internal combustion engine. As described above, more reliable control reflecting the intention of the (user) is realized.

Further, according to the invention described in claim 14 , in the electronic control device according to any one of claims 11 to 13 , the ignition / fuel injection stop condition in the internal combustion engine and the starter drive for the engine are controlled. The parameter related to the start condition is determined according to the parameter value related to the idle stop prohibition condition of the internal combustion engine, and as described above, the idle stop of the internal combustion engine must be prohibited. This makes it possible to respond flexibly even if there is a need.

More specifically, as in the invention described in claim 15 , the parameters relating to the idle stop prohibition condition of the internal combustion engine include the rotational speed of the internal combustion engine, the coolant temperature of the internal combustion engine, and the exhaust gas of the vehicle. By setting the value in accordance with at least one of the temperature of the catalyst provided in the system and the remaining battery level of the vehicle, the above-described idle stop control can be optimized in a manner suitable for the actual situation. It will be.

Further, according to the invention described in claim 16 , in the electronic control device according to any one of claims 9 to 15 , at least the operation time of the starter device is backed up as needed as the control information. Assuming that the starter device is kept in a non-volatile manner as the time during which the starter device has been continuously operated, the operation time of the starter device is accumulated by accumulating the operation time of the starter device (continuation). It is possible to measure the time during which power is automatically applied. That is, according to such a method, it is possible to monitor the continuous operation (energization) time of the starter device to prevent excessive energization of the starter device.

  Hereinafter, an embodiment in which a vehicle control method and an electronic control device according to the present invention are embodied will be described with reference to FIGS. In the system according to this embodiment as well, the engine control device (engine control ECU) and the idle stop control device (idle stop control ECU) mounted on the vehicle cooperate with each other (coordinate), and the above-described idle Stop control is performed.

First, an outline of the configuration of this system will be described with reference to FIG.
As shown in FIG. 1, this system is roughly divided into a starter device 30 for driving an internal combustion engine (engine) mounted on a vehicle to be controlled from the outside and rotating the engine internally, and the starter device 30. The idle stop control device 10 controls the idle stop operation of the engine, and further includes an engine control device 20 that performs various engine controls including ignition mode and fuel injection control.

  The two electronic control units mainly constituting this system, that is, the idle stop control unit 10 and the engine control unit 20, are respectively CPUs (central processing units) 11 and 21 and power supply circuits (power supply ICs) 12 and 22. In addition, it is configured to include CAN (Controller Area Network) controllers 13 and 23 and the like.

  Here, the power supply circuits 12 and 22 are connected to the in-vehicle battery BT via the electromagnetic main relay 40. That is, for example, when an ignition switch IGSW, which is an engine start switch, is turned on (closed) by the driver, the buffer circuit 25 and the diode D1, and further, a pull-down resistor R1 connected in parallel, by the power supply voltage of the in-vehicle battery BT Through this, the transistor T1 is turned on. When the transistor T1 is turned on, the relay coil 41 is energized, and accordingly the relay switch 42 is turned on (closed). Then, the power supply voltage (usually “14V”) of the in-vehicle battery BT is regulated to an operating voltage (Vcc) of, for example, “5V” by the power supply circuits 12 and 22, which is It is supplied (powered) to the components of the control device. On the other hand, when the ignition switch IGSW is turned off (opened), the main relay 40 (relay switch 42) is turned off (opened) after a predetermined time (for example, “5 seconds”). The power supply to the engine 10 and the engine control device 20 is cut off. Note that each of the electronic control devices according to this embodiment also includes these electronic control devices (the idle stop control device 10 and the engine control device 20), including the momentary turning off at the time of cranking (engine start) described above. When the power is shut off, the device is reset. However, in the system according to this embodiment, even if such a reset occurs unexpectedly, it is desired based on accurate control information without causing the above-described mismatch of control information. Vehicle control, that is, idle stop control is appropriately performed (details will be described later).

  The CAN controllers 13 and 23 perform data communication by accessing the bus L1 for constructing a network while managing a large number of messages in order to minimize the load on the CPUs 11 and 21.

  Further, the idle stop control device 10 and the engine control device 20 also include backup RAMs 14 and 24 that store desired data in a non-volatile manner while being always supplied with power from the in-vehicle battery BT. That is, also in this embodiment, control information (control information indicating whether or not the current vehicle state is in the idle stop state) as shown in FIG. 19 is held in each of these electronic control devices. This is updated from time to time with communication between the two (this will also be described in detail later).

  The idle stop control device 10 is configured to control the drive of the starter device 30 through a command from the CPU 11. Specifically, based on the command of the CPU 11, whether or not the relay coil 33 disposed in the power supply path of the starter device 30 (starter motor 31) is energized, and thus the ON / OFF state of the relay switch 32 is desired. To be controlled. That is, for example, when the engine is started (started up), the relay coil 33 is energized based on a command from the CPU 11, and accordingly, the relay switch 32 is turned on (closed), and the power supply voltage of the in-vehicle battery BT is supplied to the starter motor 31. . Thus, cranking (starter drive) for the internal combustion engine is started by the starter motor 31. Here, for example, in order to continue to give an appropriate command to the starter device 30 even when the command (output voltage) from the CPU 11 becomes unstable due to, for example, a voltage drop in the in-vehicle battery BT, The command to the starter device 30 is latched (data held) by the latch circuit 15. FIG. 2 is a truth table showing an operation example of the latch circuit 15. This shows an operation example of the RS latch. In the table, “R” corresponds to a reset terminal, “S” corresponds to a set terminal, and “O” corresponds to an output terminal.

  On the other hand, the engine control device 20 is configured to perform various engine controls through commands from the CPU 21. Specifically, the engine control device 20 is based on various sensor outputs from, for example, a crank angle sensor (not shown), a temperature sensor, a vehicle speed sensor, an air-fuel ratio sensor, a pressure sensor, and the like. ), And the drive of various actuators such as an igniter and an electronically controlled throttle valve.

Next, with reference to FIGS. 3-16, the control aspect of the idle stop control by the said system (FIG. 1) is demonstrated.
First, for convenience of explanation, main parameters (control information) used in this control are listed, and their names and uses are clarified. In this system, these various parameters are all stored in the backup RAMs 14 and 24 in a nonvolatile manner in the idle stop control device 10 and the engine control device 20, respectively. Thus, whenever these parameters are required, they are read from the backup RAM 14 or 24 and used for a desired application.
“Keyword”: This parameter indicates whether or not the in-vehicle battery BT (FIG. 1) mounted on the vehicle has been removed from the vehicle. In this embodiment, if the value “5AA5” is not input to this parameter, the battery BT is removed from the vehicle (see FIG. 3).
"Operation mode": This parameter relates to the operating condition of the internal combustion engine (engine) mounted on the vehicle, that is, the ignition / fuel injection stop condition and the starter drive start condition for the engine. It is. That is, in this embodiment, when “operation mode = STOP”, fuel cut or ignition cut in the internal combustion engine is executed, and state change from “operation mode = STOP” to “operation mode = RUN” ( When there is a transition, starter driving for the engine is started (see FIGS. 7, 8, and 13 to 15). The values of this parameter include, for example, the values of the following parameters “main relay state” and “idle stop condition”, the on / off state of the brake of the vehicle, the open / close state of the accelerator of the vehicle, and the turning of the steering of the vehicle It is determined according to the state, the traveling speed of the vehicle, and the degree of inclination of the traveling road of the vehicle (see FIG. 6).
“Main relay state”: This parameter indicates the on / off state of the ignition switch IGSW (FIG. 1), which is an ignition / start switch of an internal combustion engine (engine) mounted on the vehicle (FIG. 11). reference). As an application, for example, it is transmitted from the engine control device 20 to the idle stop control device 10 through a CAN transmission process (FIG. 16) described later, and is used for determining the cause of the reset in the device 10.
“Idle stop condition”: This parameter relates to an idle stop prohibition condition of an internal combustion engine (engine) mounted on the vehicle. The value of this parameter is, for example, the number of revolutions of an internal combustion engine (engine) mounted on the vehicle, the coolant temperature of the engine, the temperature of the catalyst provided in the exhaust system of the vehicle, or the vehicle. It is determined according to the remaining amount of the in-vehicle battery BT (see FIG. 12).
"Starter state _i ""Starter state _i-1 ": "Starter state _i " indicates the current on / off state of the starter device 30 (Fig. 1) mounted on the vehicle (Fig. 7). reference). On the other hand, the “starter state _i-1 ” indicates an on / off state of the starter device 30 before a predetermined time (in this embodiment, “10 ms”). Specifically, the starter device 30 is stabilized. It is used in latch circuit control (FIG. 8) performed to operate.
“Timer”: This parameter indicates a time during which the starter device 30 (FIG. 1) mounted on the vehicle is continuously operated (a time during which power is continuously supplied).
“Starter ON Timer”: This parameter indicates the limit point (limit time) of continuous operation (energization) of the starter device 30 (FIG. 1) mounted on the vehicle. An appropriate value (“500 ms” in this embodiment) is set to prevent excessive energization to 30 (see FIG. 7).

  First, with reference to FIG. 3 to FIG. 9, various control modes of the idle stop control by the system (FIG. 1), particularly the idle stop control device 10 will be described.

  FIG. 3 is a flowchart showing a processing procedure of initialization processing by the idle stop control device 10. This initialization process is performed as a process immediately after startup (including restart) in the idle stop control device 10.

  As shown in FIG. 3, when performing this initialization process, first, in step S111, whether or not the in-vehicle battery BT has been removed from the vehicle before the activation is determined based on the value of the parameter “Keyword”. to decide.

When it is determined that the in-vehicle battery BT has been removed before starting, that is, when it is determined that the value “5AA5” is not set in the “Keyword”, the value “Keyword” is set in the subsequent step S112. “5AA5” is set. Further, in the subsequent steps, the value “RUN” is set to “operation mode” (step S113), the value “OFF” is set to “starter state _i ” and “starter state _i−1 ” (step S114), and “starter” is set. Various parameters are updated (initialized) with initial data prepared in advance for initialization, such as “500 ms” for the “ON timer” (step S115). At this time, these set values are stored in the backup RAM 14 together with these various parameters.

  On the other hand, when it is determined that the in-vehicle battery BT has not been removed before startup, that is, when it is determined that the value “5AA5” has been input to the “Keyword”, it is stored in the backup RAM 14 at the previous startup. Since the values of the parameters are used, no new values are set for the various parameters (update processing (initialization) is not performed).

  FIG. 4 is a flowchart showing a processing procedure of reception processing by the idle stop control device 10. This reception process is a process performed at a predetermined cycle, for example, at a cycle of “1 ms”.

  As shown in FIG. 4, in this reception process, first, in step S121, it is determined whether or not the CAN controller 13 has received. If there is reception, the reception information is acquired in the following step S122. As described above, in the idle stop control device 10, for example, the received information is acquired at any time by checking the presence / absence of reception every “1 ms”. The received information includes the values of the parameters “main relay state” and “idle stop condition” sent from the engine control device 20 (control information).

  FIG. 5 is a flowchart showing a processing order of various controls according to the idle stop control device 10. Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

  As shown in FIG. 5, in this series of processing, operation mode determination (step S130), starter control (step S140), latch circuit control (step S150), and transmission processing (step S160) are sequentially executed. In the transmission process in step S160, data is transmitted through the CAN controller 13 (FIG. 1). The data transmitted here includes, for example, values of various parameters (control information) held in the idle stop control device 10 including the parameter “operation mode”.

  6 to 8 show details of the processing relating to the operation mode determination (step S130), starter control (step S140), and latch circuit control (step S150).

  FIG. 6 is a flowchart showing details of the processing contents of the processing relating to the operation mode determination (step S130) together with the processing procedure. Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

  As shown in FIG. 6, in this series of processing, the idle stop control device 10 first sets parameters (“main relay State” and “idle stop condition”) that it holds in steps S131 to S137. Check the value and the state of the vehicle (brake, accelerator, steering, travel speed, slope of travel road). Then, the set value of the parameter “operation mode” is determined according to these parameters and the state of the vehicle (steps S138 and S139).

  Specifically, the value of the “main relay State” is ON, the value of the “idle stop condition” is permitted, the brake is ON, the accelerator is closed, the steering is straight, the traveling speed is stopped, the slope of the traveling road is flat, When all the conditions are satisfied, the value of the parameter “operation mode” is set to “STOP”. On the other hand, when any of these conditions is not satisfied, the value of the parameter “operation mode” is set to “RUN”. At this time, the value set in the “operation mode” is stored in the backup RAM 14 (steps S138 and S139).

  FIG. 7 is a flowchart showing the details of the processing contents of the processing related to the starter control (step S140) together with the processing procedure. Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

As shown in FIG. 7, in the series of processing, the idle stop control device 10 first checks the value of the parameter “starter state _i ” held by itself in step S141. If the value of the “starter state _i ” is “OFF”, in the subsequent step S142, the state change (transition) from the “STOP” to the “RUN” of the value of the parameter “operation mode” that is also held in the same step S142. It is determined whether or not there has been. Here, when it is determined that this state change (transition) has occurred, a value “0” is set to the parameter “timer” held in the apparatus 10 in the subsequent step S143, and in further subsequent step S144, The value of “starter state _i ” is set to “ON”. Also at this time, the values of the parameters “timer” and “starter state _i ” are stored in the backup RAM 14. On the other hand, when it is determined in step S142 that there has been no state change (transition) in the “operation mode”, these processes are not performed.

When it is determined in the previous step S141 that the value of the parameter “starter state _i ” is “ON”, in the subsequent steps S145 and S146, the engine speed of the vehicle and the parameter “timer” are determined. Check the value of. In these steps, the engine speed is less than “500 rpm”, and the value of the “timer” is also the value of the parameter “starter ON timer” held in the apparatus 10 (here, “500 ms”). In step S147, “10 ms” is added to the current “timer” value. On the other hand, if at least one of the conditions is not satisfied at this time, the value of the parameter “starter state _i ” is set to “OFF” in step S148 without adding the “timer”. Note that also in these steps S147 and S148, the values of the parameters “timer” and “starter state _i ” are stored in the backup RAM 14.

  FIG. 8 is a flowchart showing details of the processing contents of the processing related to the latch circuit control (step S150) together with the processing procedure. Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

As shown in FIG. 8, in this series of processing, two parameters “starter state _i-1 ” and “starter state _i ” indicating the state of the starter device 30 in the vehicle are compared, Only when there is a state change (transition), the output of the latch circuit 15 (FIG. 1) is changed, and consequently the on / off state of the starter device 30 is changed.

Specifically, first, in steps S151 to S153, the values of "starter state _i " and "starter state _i-1 " are confirmed, and if these are the same value, in the subsequent step S155, the latch circuit Both the 15 S terminal and the R terminal are maintained at the “logic L (low) level”. On the other hand, if these are different values, the output of the latch circuit 15 is changed in order to drive the starter device 30 in accordance with the value of the “starter state _i ”. That is, if the value of "starter state _i " is "OFF" and the value of "starter state _i-1 " is "ON", the S terminal of the latch circuit 15 is set to "logic L (low)" in step S154. The starter device 30 is stopped by setting the R terminal to “logic H (high) level”. On the other hand, if the value of “starter state _i ” is “ON” and the value of “starter state _i−1 ” is “OFF”, the S terminal of latch circuit 15 is set to “logic H (high) in step S156. ) Level "and the R terminal is set to" logic L (low) level "to activate the starter device 30 (see also FIG. 2). In any case, in the final step S157, the “starter state _i-1 ” is replaced with the “starter state _i ”. That is, the parameter “starter state _i-1 ” is constantly updated at a predetermined cycle (here, “10 ms” cycle).

Next, with reference to FIG. 9 to FIG. 16, various control modes of the idle stop control by the system (FIG. 1), particularly the engine control device 20 will be described.
FIG. 9 is a flowchart showing a processing procedure of reception processing by the engine control device 20. This reception process is a process performed at a predetermined cycle, for example, at a cycle of “1 ms”.

  As shown in FIG. 9, in this reception process, first, in step S201, it is determined whether or not the CAN controller 23 has received. If there is reception, the reception information is acquired in the following step S202. In further subsequent step S203, "ON" is set to the reception flag. On the other hand, if there is no reception, these processes are not performed. As described above, the engine control apparatus 20 acquires the received information as needed by checking the presence / absence of reception every “1 ms”, for example. The reception flag in the engine control device 20 that is set to “ON” for each reception is for determining (detecting) a reception abnormality in the CAN controller 23.

  FIG. 10 is a flowchart showing the processing order of various controls by the engine control device 20. Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

  As shown in FIG. 10, in this series of processes, main relay control (step S210), idle stop condition determination (step S220), fuel cut determination (step S230), ignition cut determination (step S240), CAN transmission Processing (step S250) is sequentially executed. FIG. 11 to FIG. 16 show the details of the processing according to these steps S210 to S250.

  FIG. 11 is a flowchart showing details of the processing contents of the processing related to the main relay control (step S210) together with the processing procedure. Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

  As shown in FIG. 11, in this series of processing, first, in step S211, the ignition switch IGSW (FIG. 1), which is the start switch of the vehicle (engine), is turned on (ON) / off (OFF). It is confirmed.

  When it is determined that the switch IGSW is in the OFF state, in the subsequent step S212, the parameter “main relay State” is set to “OFF”, and in the subsequent step S213, the predetermined value is set after the switch IGSW is turned off. It is determined whether or not a time (for example, “5 seconds”) has elapsed. If it has elapsed, in step S214, the main relay 40 (FIG. 1) that constitutes the power supply system in the system is turned off. The main relay 40 is turned on. On the other hand, when it is determined in the previous step S211 that the ignition switch IGSW is in the ON state, the parameter "main relay State" is set to "ON" in the subsequent step S215, and further in the subsequent step S216, The main relay 40 is on-controlled.

  As described above, the main relay 40 is controlled to be turned on / off in accordance with the on / off state of the ignition switch IGSW that is turned on / off as an ignition / start switch of the internal combustion engine (engine).

  FIG. 12 is a flowchart showing details of the processing contents together with the processing procedure for the processing related to the idle stop condition determination (step S220). Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

  As shown in FIG. 12, in this series of processing, the engine control device 20 first, in steps S221 to S224, determines the state of the vehicle (the rotational speed of the internal combustion engine (engine), the coolant temperature of the engine). (Cooling water temperature), the temperature of the catalyst provided in the exhaust system of the vehicle, and the remaining amount of the in-vehicle battery BT (FIG. 1) are confirmed. And according to these states, the set value of the parameter “idle stop condition” held by itself is determined (steps S225 and S226).

  Specifically, when all of the conditions “engine speed <1000 rpm”, “cooling water temperature ≧ 90 ° C.”, “catalyst temperature ≧ 500 ° C.”, “remaining battery ≧ 90%” are satisfied, the above parameter “idle When the value of the “stop condition” is set to “permitted” and any of the conditions is not satisfied, the value of the “idle stop condition” is set to “prohibited”.

  FIG. 13 is a flowchart showing the details of the processing contents together with the processing procedure for the processing relating to the fuel cut determination (step S230). Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

  As shown in FIG. 13, in this series of processing, the engine control device 20 first checks the value of the parameter held by itself and the state of the vehicle in steps S231 to S234. Then, based on the values and states of these parameters, it is determined whether or not to execute fuel cut (steps S235 and S236).

  Specifically, when the vehicle is in a non-idle state, the fuel cut is not executed when the two conditions of “operation mode = RUN” and “engine speed <7000 rpm (non-overrun)” are satisfied at the same time. When any of the conditions is not satisfied, the fuel cut is executed. On the other hand, when the vehicle is in an idle state, the fuel cut is performed when all the conditions of “operation mode = RUN”, “engine speed <7000 rpm (non-overrun)”, and “engine speed <NCUT” are satisfied. If it is not executed and any of the conditions is not satisfied, the fuel cut is executed. Note that the value of “NCUT” used here is variable according to the cooling water temperature, for example, and is predetermined by a map (table) or the like stored and held in the engine control device 20 as shown in FIG. 14, for example. ing.

  As described above, in this embodiment, in addition to the fuel cut at the time of overrun or deceleration, the fuel cut is executed when an engine stop instruction (“operation mode = STOP”) is issued, and the internal combustion engine ( The engine is stopped.

  FIG. 15 is a flowchart showing details of the processing contents of the processing relating to the ignition cut determination (step S240) together with the processing procedure. Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

  As shown in FIG. 15, in the series of processing, the engine control device 20 first checks the value of the parameter “operation mode” held by the engine control device 20 in step S241. If the value of the parameter “operation mode” is RUN, normal ignition control is continued in step S242 without executing ignition cut. On the other hand, if the value of the parameter “operation mode” is STOP, ignition cut is executed in the subsequent step S243.

  FIG. 16 is a flowchart showing details of the processing contents of the processing related to the CAN transmission processing (step S250) together with the processing procedure. Note that this series of processing is also performed at a predetermined cycle, for example, at a cycle of “10 ms”.

  As shown in FIG. 16, the engine control apparatus 20 transmits data at predetermined time intervals (here, “10 ms”) through the CAN controller 23 (FIG. 1) (step S251). The data transmitted here includes various parameter values (control information) such as the “main relay state” and “idle stop condition” (see FIG. 6) that are also used in the idle stop control device 10, for example. included.

  As described above, in the system according to this embodiment, the two electronic control devices (the idle stop control device 10 and the engine control device 20) communicate with each other and update the control information (parameters) held by themselves. Based on the state of the vehicle indicated by the control information held by each of them, idle stop control is performed under the cooperation (cooperation) of these devices. For example, the parameters “main relay State” and “idle stop condition” that are appropriately updated on the engine control device 20 side based on the state of the vehicle and the like are also maintained in the idle stop control device 10 and are communicated between the two devices. The value is updated from time to time. Conversely, the parameter “operation mode” that is appropriately updated based on the state of the vehicle and the like on the idle stop control device 10 side is also retained in the engine control device 20, and between the two devices. The value is updated from time to time with communication. Hereinafter, with reference to FIG. 17 again, an update mode of control information (parameters) that is performed as needed through communication between these electronic control devices will be described.

  As shown in FIG. 17, when the engine control device 20 is started (including restart), first, in the device 20, an ignition switch IGSW that is a start switch of the vehicle (engine) is turned off. It is judged that there is. For example, when the driver turns on the switch IGSW, the internal combustion engine (engine) mounted on the vehicle is in a normal operation state. Thereafter, the engine control device 20 performs the operation of the engine while switching between normal operation and idle stop operation based on the value of the parameter “operation mode” sent from the idle stop control device 10. To control. Note that, as described above, control such as fuel cut and ignition cut is performed during the idling stop operation (see FIGS. 13 and 15).

  On the other hand, the idle stop control device 10 determines whether the operation is the normal operation or the idle stop operation based on the value of the parameter “operation mode”, and executes the starter drive for the internal combustion engine of the vehicle at an appropriate timing ( Start. Further, the idle stop control device 10 is sent from the engine control device 20 to reflect the state of the vehicle monitored on the engine control device 20 side to the value of the parameter “operation mode”. It is updated from time to time based on the values of the incoming parameters “Main Relay State”, “Idle Stop Condition”, etc. (see FIG. 6).

  As described above, according to the system according to this embodiment, the control information held by each person through communication between the electronic control devices is updated as needed, and the idle stop control is appropriately performed based on the control information. . Moreover, in the idle stop control device 10, control information is backed up to the backup RAM 14 as needed. Then, when a reset (reset release) based on power interruption occurs in the idle stop control device 10, it is determined whether or not this is an unexpected reset, and it is determined that this is an unexpected reset. In this case, the control information is not subjected to update processing (initialization) using initial data prepared in advance for initialization. Specifically, the control information is initialized only when it is determined that the in-vehicle battery BT serving as the power source of the backup RAM 14 is removed from the vehicle immediately after the idle stop control device 10 is restarted. That is, when it is determined that the battery BT is not removed from the vehicle, the control information is not initialized, and the backup data immediately before the occurrence of the reset is used as control information in the device 10 ( (See FIG. 3). For this reason, as indicated by the broken line in FIG. 17, even when a reset based on an unintended power interruption occurs in the idle stop control device 10, the control information held in the device 10 By the backup data (stored in the backup RAM 14) immediately before the occurrence, a state (value) that matches the actual state of the vehicle is obtained. That is, as shown in FIGS. 18A to 18C, in this system, the actual state (the state of the vehicle) and the control information (particularly the parameter “operation mode”) held in the idle stop control device 10 are concerned. In addition, matching with the control information held in the engine control device 20 is always taken.

As described above, according to the vehicle control method and the electronic control apparatus according to this embodiment, the following excellent effects can be obtained.
(1) In this system, two electronic control devices (the idle stop control device 10 and the engine control device 20) communicate with each other and update their own control information (parameters) and are held by each of them. Based on the vehicle state indicated by the control information, idle stop control is performed under the cooperation (cooperation) of these devices. Among these, the idle stop control device 10 backs up control information as needed, and when a reset based on the power interruption occurs in the device 10, the in-vehicle battery BT serving as the power source of the backup RAM 14 storing the control information is removed from the vehicle. Determine whether or not Then, when it is determined that the control data is not removed, the backup data immediately before the occurrence of the reset is transferred to the control information without performing update processing (initialization) with initial data prepared in advance for initialization. 10 is used as control information.

  Thus, even when a reset based on an unintended power interruption occurs in the idle stop control device 10, the control information is not rewritten with incorrect information, and the appropriate control information is surely transferred to the idle stop control device. 10 can be held. For this reason, it is possible to appropriately perform desired vehicle control, that is, idle stop control, based on accurate control information without causing the above-described mismatch of control information.

(2) Further, since initialization is not performed at the time of restart, the processing load at the time of restart can be reduced.
(3) As one of the control information held in the idle stop control device 10 and the engine control device 20, ignition / fuel injection stop conditions in an internal combustion engine (engine) mounted on the vehicle and a starter for the engine The parameter “operation mode” related to the driving start condition is adopted. These parameters are particularly important for smoothly and efficiently performing idle stop control.

  (4) In addition, this parameter “operation mode” is set according to the on / off state of the vehicle brake, the opening / closing state of the accelerator of the vehicle, the turning state of the steering of the vehicle, the traveling speed of the vehicle, and the inclination of the traveling road of the vehicle The value was determined (see FIG. 6). The parameters listed here are particularly important in order to properly determine the ignition / fuel injection stop conditions in the internal combustion engine (engine) mounted on the vehicle and the starter drive start conditions for the engine.

  (5) The value of the parameter “operation mode” is determined according to the on / off state of the ignition switch IGSW that is turned on / off as the ignition / start switch of the internal combustion engine (engine) ( (See FIG. 6). As a result, more reliable idle stop control in which the intention of the driver (user) is reflected is realized.

  (6) Further, the value of the parameter “operation mode” is determined according to the parameter “idle stop condition” relating to the idle stop prohibition condition of the internal combustion engine (engine) (see FIG. 6). As a result, even when it is necessary to prohibit idle stop of the same engine, it is possible to flexibly cope with this.

  (7) Further, this parameter “idle stop condition” is set according to the rotational speed of the internal combustion engine, the cooling water temperature of the internal combustion engine, the temperature of the catalyst provided in the exhaust system of the vehicle, and the remaining battery level of the vehicle. It was determined (see FIG. 12). As a result, the idle stop control can be optimized in a manner more suitable for the actual situation.

  (8) The idle stop control device 10 backs up the operation time of the starter device 30 (the parameter “timer”) as needed, and the starter device 30 is continuously operated (continuously energized). The device 10 is held in a non-volatile manner. As a result, excessive energization of the starter device 30 can be prevented.

The embodiment described above may be modified as follows.
In the above embodiment, when the idle stop control device 10 backs up the control information at any time and the device 10 is reset based on the power interruption, it is determined whether or not this is an unexpected reset, Only when it is determined that this is an unexpected reset, the control information is not initialized (see FIG. 3). However, if such a determination is not particularly necessary, the control information is initialized when the reset (reset release) based on the power shutdown occurs in the idle stop control device 10 without making this determination. A configuration (or method) that is not performed may be employed. Also in this case, desired vehicle control can be properly performed based on accurate control information without causing the above-described mismatch of control information.

  -As for the control information held in the two electronic control devices (the idle stop control device 10 and the engine control device 20) and updated as needed, any information may be adopted depending on the desired control. it can.

  In addition, the medium that holds the control information in a non-volatile manner is not limited to the above-described backup RAM as long as the control information can be backed up.

  Further, the present invention can be appropriately adopted not only for the above-described idle stop control but also for other vehicle controls.

1 is a block diagram showing a schematic configuration of an electronic control device according to an embodiment of a vehicle control method and an electronic control device according to the present invention. The truth table which shows the operation example of a latch circuit. The flowchart which shows the process sequence of the initialization process by an idle stop control apparatus about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the reception process by an idle stop control apparatus about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process order of the various control which concerns on the idle stop control apparatus about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the process which concerns on operation mode determination (step S130 of FIG. 5) about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the process which concerns on starter control (step S140 of FIG. 5) about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the process which concerns on the latch circuit control (step S150 of FIG. 5) about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the reception process by an engine control apparatus about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the various control which concerns on an engine control apparatus about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the process which concerns on the main relay control (step S210 of FIG. 10) about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the process which concerns on idle stop condition determination (step S220 of FIG. 10) about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the process which concerns on the fuel cut determination (step S230 of FIG. 10) about the control method of the vehicle which concerns on the embodiment. 14 is a map that associates the value of “NCUT” in FIG. 13 with the cooling water temperature. The flowchart which shows the process sequence of the process which concerns on the ignition cut determination (step S240 of FIG. 10) about the control method of the vehicle which concerns on the embodiment. The flowchart which shows the process sequence of the process which concerns on the CAN transmission process (step S250 of FIG. 10) about the control method of the vehicle which concerns on the embodiment. The figure which shows typically the update aspect of the control information currently hold | maintained at the idle stop control apparatus and the engine control apparatus in the system which concerns on the embodiment. (A)-(c) are the actual state (vehicle state), the control information held in the idle stop control device, the control information held in the engine control device, for the system according to the above embodiment, FIG. The figure which shows typically the update aspect of the control information currently hold | maintained at the idle stop control apparatus and the engine control apparatus in the conventional system. (A) to (c) show the transition of the actual state (vehicle state), the control information held in the idle stop control device, and the control information held in the engine control device with respect to the conventional system. The figure shown in contrast.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Idle stop control apparatus, 11, 21 ... CPU (central processing unit), 12, 22 ... Power supply circuit (power supply IC), 13, 23 ... CAN controller, 14, 24 ... Backup RAM, 15 ... Latch circuit, 20 ... Engine control device, 30 ... starter device, 31 ... starter motor, 32 ... relay switch, 33 ... relay coil, 40 ... main relay, 41 ... relay coil, 42 ... relay switch, BT ... vehicle battery, IGSW ... ignition switch.

Claims (16)

Based on the state of the vehicle indicated by the control information held by each of the first and second electronic control devices mounted on the vehicle while communicating with each other to update the control information held by the first and second electronic control devices. In the vehicle control method for performing desired vehicle control under the cooperation of the first and second electronic control units,
The first and second electronic control units respectively drive an electronic control unit for controlling an ignition mode and a fuel injection mode in an internal combustion engine mounted on the vehicle, and an internal combustion engine mounted on the vehicle from the outside. An electronic control device for controlling an idle stop operation of a starter device that rotates the self-rotation device, wherein the desired vehicle control is an idle stop control of an internal combustion engine mounted on the vehicle, and the first and second Each of the electronic control devices includes a backup RAM that is always powered by a battery mounted on the vehicle and backs up the control information including information indicating whether or not the battery has been removed from the vehicle. One of the first and second electronic control devices is reset based on power interruption, and the battery is removed from the vehicle. When the information indicating whether or not the battery indicates that the battery is not removed from the vehicle, the control information is not updated by the initial data prepared for initialization, and the reset has not occurred. A vehicle control method, wherein backup data immediately before the occurrence of the reset, backed up in a backup RAM of the other electronic control device, is used as the control information in the one electronic control device in which the reset has occurred. When one of the first and second electronic control devices is reset based on a power shutdown, and information indicating whether the battery has been removed from the vehicle indicates that the battery has been removed from the vehicle, The vehicle control method according to claim 1, wherein an update process is performed on the control information using initial data prepared in advance for initialization. The vehicle control method according to claim 1 , wherein the control information includes parameters relating to a stop condition of ignition / fuel injection in the internal combustion engine and a starter drive start condition for the engine . Parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine are the brake on / off state of the vehicle, the opening / closing state of the accelerator of the vehicle, and the turning of the steering of the vehicle The vehicle control method according to claim 3, wherein the value is determined according to at least one of a state, a traveling speed of the vehicle, and a degree of inclination of the traveling road of the vehicle. Parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter driving start condition for the engine depend on the on / off state of the ignition switch that is turned on / off as the ignition / start switch of the internal combustion engine. The vehicle control method according to claim 3 or 4, wherein the value is determined. The parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine are determined according to the parameter value relating to the idle stop prohibition condition of the internal combustion engine. The vehicle control method according to any one of claims 3 to 5. Parameters relating to the idle stop prohibition condition of the internal combustion engine include at least the rotational speed of the internal combustion engine, the coolant temperature of the internal combustion engine, the temperature of the catalyst provided in the exhaust system of the vehicle, and the remaining battery level of the vehicle. control method for a vehicle according to claim 6 in which the value is determined in response to one. The second electronic control unit, according to claim 1 to 7 for holding it from time to time a backup operation time of at least the starter device as the control information in a nonvolatile as the time that has been continuously operating the starter The vehicle control method according to any one of claims . Based on the state of the vehicle indicated by the control information held by each of the first and second electronic control devices mounted on the vehicle while communicating with each other to update the control information held by the first and second electronic control devices. In an electronic control device that performs idle stop control of an internal combustion engine mounted on the vehicle under the cooperation of the first and second electronic control devices,
The first and second electronic control units respectively drive an electronic control unit for controlling an ignition mode and a fuel injection mode in an internal combustion engine mounted on the vehicle, and an internal combustion engine mounted on the vehicle from the outside. An electronic control device for controlling an idle stop operation of a starter device that rotates the self-powered device, wherein the first and second electronic control devices are constantly powered by a battery mounted on the vehicle, and the battery is supplied to the vehicle. Each of which includes a backup RAM that backs up the control information including information indicating whether or not it has been removed from the battery, and a reset based on a power shutdown occurs in one of the first and second electronic control devices, and the battery When the information indicating whether or not the battery has been removed from the vehicle indicates that the battery has not been removed from the vehicle, the control The backup data immediately before the occurrence of the reset that is backed up in the backup RAM of the other electronic control unit in which the reset has not occurred is performed without performing the update process with the initial data prepared for initialization on the information. Used as the control information in one electronic control device in which the reset has occurred
An electronic control device characterized by that . When one of the first and second electronic control devices is reset based on a power shutdown, and information indicating whether the battery has been removed from the vehicle indicates that the battery has been removed from the vehicle, The control information is updated by initial data prepared in advance.
The electronic control device according to claim 9 . 11. The electronic control device according to claim 9 , wherein the control information includes parameters relating to a stop condition of ignition / fuel injection in the internal combustion engine and a starter drive start condition for the engine . Parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine are the brake on / off state of the vehicle, the opening / closing state of the accelerator of the vehicle, and the turning of the steering of the vehicle The electronic control device according to claim 11 , wherein the value is determined in accordance with at least one of a state, a traveling speed of the vehicle, and a degree of inclination of the traveling road of the vehicle . Parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine depend on the on / off state of the ignition switch that is turned on / off as the ignition / start switch of the internal combustion engine. The electronic control device according to claim 11 or 12, wherein the value is determined. The parameters relating to the ignition / fuel injection stop condition in the internal combustion engine and the starter drive start condition for the engine are determined according to the parameter value relating to the idle stop prohibition condition of the internal combustion engine. The electronic control device according to any one of claims 11 to 13 . Parameters relating to the idle stop prohibition condition of the internal combustion engine include at least the rotational speed of the internal combustion engine, the coolant temperature of the internal combustion engine, the temperature of the catalyst provided in the exhaust system of the vehicle, and the remaining battery level of the vehicle. electronic control device according to claim 14 in which the value is determined in response to one. The electronic control according to any one of claims 9 to 15 , wherein at least an operation time of the starter device is backed up as the control information as needed, and is stored in a nonvolatile manner as a time during which the starter device has been continuously operated. apparatus.

Images