JPS60142027A - Engine throttle valve controller - Google Patents

Abstract

PURPOSE:To reduce unburnt components in exhaust gas while maintaining deceleration feeling, in a controller for enlarging the opening of throttle valve under deceleration, by providing means for correcting the opening of throttle valve to wider level under brake operation. CONSTITUTION:A negative pressure actuator 4 is provided to a throttle valve 3 in an intake path 1 while a solenoid 18 for driving a stopper is provided to the actuator 4. Upon exceeding of a signal from an engine rotation sensor 14 over a setting level (a), a signal is fed from a comparator 16 to three-way solenoid valve 9 to function the actuator 4 thus to move a rod 6 in the arrow direction A and to open the throttle valve slightly under deceleration. Upon operation of brake 10, a hydraulic switch 13 will detect variation of hydraulic pressure to function a solenoid 18 by means of the output from an amplifier circuit 19 thus to move a stopper 18a in the arrow direction C and to move a diaphragm 7a further in the direction A to widen the opening of throttle valve 3.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to an engine throttle valve control device. [Prior Art] In general, an engine throttle valve control device controls the opening and closing of a throttle valve in response to the driver's accelerator operation. In this device, when the driver takes his foot off the accelerator pedal, the throttle valve will naturally close to the fully closed position and the engine will be decelerated. When the car is idle, the intake air filling efficiency decreases and combustion performance worsens, so depending on the driving condition just before deceleration,
) There was a problem in which the unburned components in the gas increased. (As an example of a device that eliminates the rotation of the engine, there is a so-called sl:l y l positioner as shown in Japanese Utility Model Application No. 54-145723. When the number of decelerations exceeds a set value, the fully closed opening of the throttle valve is changed to a large opening.As another device,
There is a so-called SRJ nottle opener, which uses the increase in intake negative pressure during deceleration to increase the fully closed opening degree of the throttle valve. However, with such conventional throttle valve control devices, the sense of deceleration is impaired when the throttle valve's fully closed position during deceleration is increased to a large opening. [Objective of the Invention] The invention aims to solve this problem. In view of this, the unburned components during deceleration can be expressed as 11'i,1 without reducing the feeling of deceleration.
This paper proposes an engine throttle valve control device that can reduce ζ. [Structure of the Invention] By the way, when decelerating a vehicle, the engine is not only decelerated by taking your foot off the accelerator pedal as in the case of a double-barreled system, but also decelerating the engine.
Furthermore, do you brake the wheels by depressing the brake pedal? And when operating this brake,
Regardless of the opening degree of the throttle valve, the vehicle is decelerated and a sufficient feeling of deceleration can be obtained. Therefore, the present invention is an engine throttle valve control device that increases the full opening of the throttle valve during deceleration, and corrects the throttle valve by changing the fully closed opening to a larger opening when the brake is applied. As a result, the feeling of deceleration is maintained through brake operation, and unburned components are reduced by wide opening the throttle valve. [Example] Hereinafter, an example of the present invention will be described with reference to the drawings. The drawing shows an engine throttle valve control device according to an embodiment of the present invention, and this is an example applied to a throttle positioner. In the figure, reference numeral 1 denotes an intake passage of the engine, a carburetor 2 is provided in the middle of the intake passage 1, and a suroso-ruharbu 3 is disposed downstream of the carburetor Z of the intake iJI circuit 1. , the throttle valve 3 is opened and closed in conjunction with an accelerator pedal (not shown). The second slot 71 is provided with an actuator 4 for increasing its fully closed opening degree. In this actuator 4, a locking lever 5 is integrally formed with the shaft 3a of the throttle valve 3, and the locking lever 5 is adapted to abut and lock by a bent portion 6a at the tip of the rod 6. . The other end of this rod 6 is fixed to the atmospheric pressure chamber 7b side of the diaphragm 7a of the diaphragm device 7, and the negative pressure chamber 7c of the wire diaphragm device W7 has a spring member 7d that urges the diaphragm 7a toward the atmospheric pressure chamber 7b side. is installed. One end of a negative pressure introduction passage 8 is connected to the negative pressure chamber 7c, and the other end of the negative pressure introduction passage 8 is connected to the downstream side of the throttle valve 3 of the intake passage 1. A three-way solenoid 9 is interposed in the middle of this negative pressure introduction passage 8, and the three-way solenoid 9 normally introduces atmospheric pressure from its atmosphere opening 9a into the negative pressure chamber 7c and receives a drive signal. When

[The negative pressure downstream of the Kosotor Halbu 3 is introduced into the negative pressure chamber 7C. Further, a solenoid 8 for variably controlling the amount of deformation of the diaphragm 7a is attached to the rear wall of the diaphragm device 7, and when the solenoid 18 receives a drive signal C, it slides its strain bar 18a in the direction of arrow C in the figure. The above-mentioned deformation m can be largely avoided. In the figure, 10 is the brake pedal, IJ is the brake, and 1
2 is a brake 1 in response to the depression operation of the brake pedal 10.
1 is a hydraulic passage that supplies hydraulic pressure; 13 is a pressure sensor (brake operation detection means) that detects whether the brake 11 is being operated from a change in the oil pressure of the hydraulic passage 12; and 14 is an engine rotation speed that detects the engine rotation speed. sensor (engine speed detection means), 15 a set voltage generation circuit that generates a set voltage a corresponding to the set value of the engine speed; 16;
17 is a comparison circuit that compares the output of the engine speed sensor 14 and the output of the set voltage generation circuit 15; 17 is a comparison circuit 16;
An amplifier circuit 19 amplifies the output of the pressure switch 13 and applies it as a drive signal to the three-way solenoid 9;
The amplifying circuit 19 and the solenoid 18 constitute a fully closed opening degree changing means 20 for correcting the fully closed degree of the throttle valve 3 to a larger opening degree. Next, the operation will be explained. When the engine rotation speed is detected by the engine rotation speed sensor 4, the output of the sensor 14 is converted to the set voltage a by the comparison circuit 16.
compared to If the engine rotation speed is higher than the rotation speed setting value, the comparison circuit 16 outputs a signal "1", and this signal "1" is amplified by the amplifier circuit 17 and applied to the three-way solenoid 9 as a drive signal. . Then, in the diaphragm device 7, the throttle valve 3 is inserted into the negative pressure chamber 7c.
Negative pressure downstream is introduced, and the diaphragm 7a
The rod 6 is deformed and moved in the direction of arrow A in the figure against the spring force d, and is in a state where it is slid in the direction of the arrow. When the driver takes his foot off the accelerator pedal in this state, the throttle valve 3 rotates in the direction of arrow B in the figure, and when the locking lever 5 comes into contact with the bent part 6a of the rod 6, the throttle valve 3 rotates. The throttle valve 3 is held at a fully closed opening larger than the idling opening, thereby decelerating the engine and ensuring combustibility by drawing in an appropriate amount of intake air and preventing the generation of unburned components. This will be suppressed. When the engine is decelerated in this way and the engine speed becomes less than the set value, the output of the comparator circuit 16 becomes "0" and the output of the drive signal is stopped. Then, in the diaphragm device 7, atmospheric pressure is introduced into the negative pressure chamber 7c through the atmosphere opening port 9a, and the diaphragm 7a is deformed and restored in the opposite direction to the input direction by the spring force of the spring portion JtA7a, so that the rondro is reversed to the input direction. The locking lever 5 further rotates in the direction of arrow B, and the throttle valve 3 closes to the idle opening degree, thereby significantly decelerating the engine. Then, when the brake pedal 10 is depressed when the engine speed is decelerated to the setting A1 or more as described above,
When the brake 1j is activated, the pressure switch 13 detects that the brake 11 is being operated based on the change in the oil pressure in the hydraulic passage 12, and outputs "1" to indicate that the brake 1j is being operated, and the signal "1" is output.
is amplified by the amplifier circuit 19 and applied to the solenoid 18 as a drive signal C, and the solenoid F18 outputs the strike signal C.
The collar 18a is moved in the direction of arrow C. Then, in the diaphragm device 7, the diaphragm 7a is further deformed and moved in the direction of the arrow, and the two-stroke valve 3 is opened to a larger fully closed opening than when the brake is not operated. In the device of this embodiment as described above, when the engine speed is decelerating beyond the set value and when the brake is applied, the throttle valve is opened to a larger fully closed opening than when the brake is not applied. The unburned components can be significantly reduced, and the feeling of deceleration is maintained by braking (i(II).Although the above embodiment has been explained with respect to a throttle/nottle opener, the present invention can of course be similarly applied to a throttle/nottle opener. Also, the actuator that increases the closing opening degree of Throno L-]L/Bal/Pal may be other than a diaphragm device, such as an electromagnetic solenoid. Detection may be made from the amount of depression of the brake pedal instead of from the amount of pressure applied to the brake pedal. [Effects of the Invention] As described above, according to the present invention, the engine is configured to sharply close the throttle valve at the time of deceleration. In the throttle valve control device of , when the brake is pressed, the fully closed opening of the throttle/nottle valve is changed to a larger opening to compensate, without impairing the feeling of deceleration.
This has the effect of significantly reducing unburned components during deceleration.

[Brief explanation of the drawing]

The drawing is a schematic diagram of an engine throttle control system according to an embodiment of the present invention. 3...Throttle valve, 13...Pressure switch/notch (brake operation detection means), 20...Full close/opening degree changing means.

Claims (1)

[Claims] (1) In an engine throttle valve control device that increases the fully closed opening degree of the throttle valve during deceleration, there is provided a brake operation detection means for detecting that the brake is being operated, and a brake operation based on the output of the detection means. 1. A throttle valve control device for an engine, comprising: fully closed opening degree changing means for correcting the fully closed opening degree of the throttle valve to a larger opening degree when the throttle valve is being operated.