JPS6342097B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening correction device for a throttle valve in an intake system of an engine with an automatic transmission for a vehicle.

Generally, when the automatic transmission is switched from the parking range to the driving range while the engine in the vehicle's main power system is idling, the engine's idle speed tends to decrease due to the load from the drive wheels, especially when the switching If a large load from the air conditioner is applied to the main power system under these conditions, the idle speed will drop significantly.

Therefore, in order to eliminate the above-mentioned inconvenience, for example, as disclosed in Japanese Utility Model Application Publication No. 55-112049, when the automatic transmission is in the driving range, the idle opening of the throttle valve is corrected to increase, and in that state, the air conditioner A system has been proposed in which the idle opening of the throttle valve is further increased and compensated for when the air conditioner operates, but this method requires that other external loads with smaller loads than the air conditioner be used. Even if it is applied to the main power system, it is not possible to correct the increase in the idle opening of the throttle valve, so the idle speed of the engine tends to decrease to some extent when other external loads are applied. Even when the shock absorber is not operating, as long as the automatic transmission is in the driving range, the idle opening of the throttle valve is always increased and corrected regardless of the vehicle speed, so sufficient engine braking effect cannot be obtained during deceleration driving. The problem is that there is no.

An object of the present invention is to provide an opening correction device for a throttle valve in an intake system of an engine equipped with an automatic transmission for a vehicle, which can solve the above-mentioned problems. an actuating device for correcting the idle opening of a throttle valve provided in an intake system of the throttle valve so as to be larger than the normal idle opening; a first actuation control device that operates the actuating device to perform a first-stage correction to make the opening larger than the opening; and a first actuation control device that operates the actuating device to make the first-stage correction to make the idle opening of the throttle valve larger than the opening. a second actuation control device that actuates the actuating device to perform a second stage correction that further increases the opening degree according to the air conditioner; a first control signal generator that sends a control signal to the first actuation control device when a load is applied to the main power system; a second control signal generating device that sends a control signal to the first operation control device; and a second control signal generating device that sends a control signal to the first operation control device; and a third control signal generating device that sends a control signal to the control device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which an embodiment of the present invention is applied to an intake throttle valve of an engine with an automatic transmission mounted on an automobile body will be described below with reference to the drawings.

First, in FIG. 1, a throttle valve 4 is disposed on the downstream side of the vent lily pipe 3 in which the fuel nozzle 2 is opened in the carburetor 1, and the idle opening degree of the throttle valve 4 is determined by the rod. 5, it is adapted to receive the corrective action of an actuating device 6. Actuation device 6
Inside, a fixed wall 7 having a communication hole 8 in the center
A diaphragm 9 connected to the rod 5 is disposed in front of the fixed wall 7, and a second diaphragm 11 is disposed behind the fixed wall 7. Since the return spring 10 is interposed between the diaphragm 9 and the fixed wall 7, while the room between the pair of diaphragms 9 and 11 is maintained at atmospheric pressure,
The diaphragm 9 is maintained at a position where the idle opening degree of the throttle valve 4 is not corrected. Also,
A movable stopper 12 is provided at the center of the diaphragm 11.
The base end of the movable stopper 1 is fixed.
The distal end portion of 2 passes through the communication hole 8 and projects further forward than the fixed wall 7. Then, when the chamber between the pair of diaphragms 9 and 11 is maintained in a negative pressure state,
The diaphragm 9 is deformed until it comes into contact with the tip of the movable stopper 12, and the idle opening of the throttle valve 4 is corrected in the direction of increasing it.

A fixed stopper 1 is installed behind the diaphragm 11.
2' is provided, and while the chamber behind the diaphragm 11 is maintained at atmospheric pressure, the diaphragm 11 is maintained at a position separated from the fixed stopper 12'. When the pressure is maintained, the diaphragm 11 deforms toward the fixed stopper 12', and the movable stopper 12 moves back, thereby correcting the idle opening of the throttle valve 4 in the direction of further increasing it. I'm starting to be able to do it.

Next, the operation control devices 15 and 16 for controlling the operation of the actuation device 6 will be explained. The chamber between the pair of diaphragms 9 and 11 communicates with a chamber 18 formed in the actuation control device 15 via a pipe 13, and this chamber 18 communicates with a negative pressure section in the intake pipe of the engine via a pipe 22. It communicates with a negative pressure source 23 such as , and is adjacent to a chamber 19 via a partition wall 17 having a valve hole in the center, and this chamber 19 further communicates with the atmosphere via a filter 24 . There is. A valve body 21 is disposed within the chamber 18, and a solenoid 20 for driving the valve body 21 is disposed within the chamber 19.

While no control signal is sent to the solenoid 20 and the solenoid 20 is not energized, the valve body 21 opens the valve hole of the partition wall 17, and at this time, the chamber between the pair of diaphragms 9 and 11 is connected to the pipe 13 and the chamber. 18, 19, are maintained at atmospheric pressure by communicating with the atmosphere via a filter 24, and when a control signal is sent to the solenoid 20 and energized, the valve body 21 blocks the valve hole of the partition wall 17. As a result, the chamber between the pair of diaphragms 9 and 11 is placed in a negative pressure state by communicating with the negative pressure source 23 via the tube 13, the chamber 18, and the tube 22.

The rear chamber of the diaphragm 11 communicates via a tube 14 into a chamber 26 formed in the actuation control device 16, which chamber 26 communicates via a tube 30 with a negative pressure source 23 and , is adjacent to a chamber 27 via a partition wall 25 having a valve hole in the center, and this chamber 27 is further communicated with the atmosphere via a filter 31. A valve body 29 is disposed within the chamber 26, and a solenoid 28 for driving the valve body 29 is disposed within the chamber 27.

While no control signal is sent to the solenoid 28 and the solenoid 28 is not energized, the valve body 29 opens the valve hole of the partition wall 25, and at this time, the rear chamber of the diaphragm 11 is connected to the pipe 14, the chambers 26, 27, Filter 31
When a control signal is sent to the solenoid 28 and the solenoid 28 is energized, the valve element 29 blocks the valve hole of the partition wall 25, and as a result, the diaphragm 11 The back room of
It is placed in a negative pressure state by communicating with a negative pressure source 23 via the pipe 14, chamber 26, and pipe 30.

Next, the control signal generator A will be explained. The external load group 36, which is powered by the power of the main power system including the engine and has a smaller load than the air conditioner 41, includes, for example, an external load 32 such as a headlight or a small light, and an external load 33 such as a heater blower. , external loads such as rear hot wires 3
4. It consists of an external load 35 such as a cooling fan, etc., and these external loads 36 are designed to immediately generate a signal and send it to the signal OR circuit 37 when placed in an operating state. OR
The output signal of the circuit 37 is sent to the solenoid 20 as a control signal of the control signal generator A, and the solenoid 20 is energized.

Next, control signal generator B will be explained. The main power system operating speed responsive signal generator 38 generates a signal when the vehicle speed is, for example, 20 km/h or less, and sends the signal to the AND circuit 40 . The main power system operating range response signal generator 39 generates a signal only when the automatic transmission is in the driving range (so-called D range),
The signal is sent to the AND circuit 40. AND circuit 40
The output signal is sent to the solenoid 20 as a control signal of the control signal generator B, independently of the operation of the control signal generator A, and the solenoid 20 is energized.

The control signal generator C includes the air conditioner 41 and generates a signal as soon as it is put into operation, and the signal is sent to the solenoid 28 as a control signal of the control signal generator C to cause the solenoid 28 to be activated. Turn on the power. At this time, when the air conditioner 41 is operated, an external load 33 such as a heater blower is simultaneously operated.
In this way, when the control signal generator C generates a control signal, at least one of the external loads 36 is operating, so the control signal generator A generates the control signal and the solenoid 20
is configured such that it is in an energized state.

Since the illustrated embodiment is configured as described above, when the vehicle speed is 20 km/h or less and the automatic transmission is in the driving range, the main power system operating speed responsive signal generator 38 and the main power system operating Since the area-responsive signal generator 39 also generates signals,
The AND circuit 40 generates an output signal, and the control signal generator B generates a control signal regardless of the load state of the external load group 36, so that the solenoid 20
is energized. As a result, the chamber between the pair of diaphragms 9 and 11 is placed in a negative pressure state, so that the first stage opening correction is performed so that the idle opening of the throttle valve 4 is greater than the normal idle opening. It will be done.

Also, even if the vehicle speed exceeds 20km/h,
Or if the automatic transmission is in a power cutoff state,
Even when the AND circuit 40 is not generating an output signal, if at least one of the external loads 36 is in an operating state, the OR circuit 37 generates an output signal, and the control signal generator A transmits the control signal to the solenoid 20. energizes the solenoid 20. As a result, the chamber between the pair of diaphragms 9 and 11 is placed in a negative pressure state, so that the throttle valve 4
The first stage opening degree correction is performed so that the idle opening degree of the engine is increased from the normal idle opening degree.

In addition to the state in which the first stage opening degree correction is performed, when a relatively large load is applied to the air conditioner 41, the control signal generator C also generates a control signal, and the solenoid 28 is energized. Ruru. As a result, the rear chamber of the diaphragm 11 is also placed in a negative pressure state, so that the second-stage opening correction is performed so that the idle opening of the throttle valve 4 is further increased than the opening due to the first-stage correction. It will be done.

As described above, according to the present invention, an actuating device for correcting the idle opening of a throttle valve provided in the intake system of an engine with an automatic transmission mounted on a vehicle body so that it becomes larger than a normal idle opening. and,
a first actuation control device that operates the actuating device to perform a first stage correction of making the idle opening of the throttle valve larger than the normal idle opening when receiving the control signal; When I received it,
a second operation control device that operates the actuator to perform a second-stage correction in which the idle opening of the throttle valve is further increased in addition to the opening obtained by the first-stage correction; and an air conditioner. a first control signal generating device that sends a control signal to the first actuation control device when at least one external load having a smaller load amount than the main power system is applied to the main power system; a second control signal generating device that sends a control signal to the first operation control device only when the vehicle is located in the vehicle and the vehicle speed is below a predetermined value;
In addition to the first stage correction state, the third control signal generating device is further provided, which sends a control signal to the second operation control device when the load of the air conditioner is applied to the main power system. Even if one of the external loads with a smaller load than the air conditioner acts on the main power system, the idle opening of the throttle valve can be switched to the increase correction state of the first stage, and furthermore, in this state When the load of the air conditioner acts on the main power system in Since the idling opening degree of the throttle valve can be finely corrected in stages according to the magnitude of the external load, it is possible to contribute to stabilizing the idling operation of the engine and reducing fuel consumption. In addition, when the automatic transmission is in the driving range, the idle opening of the throttle valve is changed to the first position only when the vehicle speed is below a predetermined value.
Since it is possible to switch to an incremental correction state, there is almost no risk that the engine's idle speed will decrease even when the automatic transmission is switched from the parking range to the driving range.
If the vehicle speed is above a predetermined value with no external load acting on it, the idle opening of the throttle valve will not be corrected to increase even if the automatic transmission is in the driving range.
Sufficient engine braking effect can be obtained during deceleration driving.

[Brief explanation of drawings]

The figure is a circuit explanatory diagram of a throttle valve opening correction device based on an embodiment of the present invention. 4... Throttle valve, 6... Actuation device, 15... First
an operation control device, 16... a second operation control device,
32-35...external load, 41...air conditioner, A, B, C...first, second, third control signal generator.

Claims (1)

[Claims] 1 An actuating device 6 for correcting the idle opening degree of the throttle valve 4 provided in the intake system of an engine with an automatic transmission mounted on the vehicle body to be larger than the normal idle opening degree, and an actuating device 6 that receives a control signal. When,
a first operation control device 15 that operates the actuating device 6 to perform a first-stage correction to make the idle opening degree of the throttle valve 4 larger than the normal idle opening degree, and upon receiving a control signal; a second operation control device 16 that operates the actuating device 6 to perform a second stage correction in which the idle opening degree of the throttle valve 4 is further increased in addition to the opening degree resulting from the first stage correction; and an air conditioner. a first control signal generating device that sends a control signal to the first actuation control device 15 when at least one external load among the external loads 32 to 35 having a smaller load amount than the dayer 41 is applied to the main power system; A, a second control signal generator B that sends a control signal to the first operation control device 15 only when the automatic transmission is in the driving range and the vehicle speed is below a predetermined value, and the first stage correction. In addition to the condition, a third control signal generator C sends a control signal to the second operation control device 16 when the load of the air conditioner 41 is added to the main power system.
An opening correction device for a throttle valve in an intake system of an engine with an automatic transmission for a vehicle, characterized by comprising: