JPS5910750A - Engine throttle valve controller - Google Patents

Abstract

PURPOSE:To prevent the deterioration of comfortability and variation of car speed under travelling on a coarse road, by reducing the throttle valve (a) open/ close speed when the integrated value of the acceleration of the up/down vibration of car exceeds over predetermined level. CONSTITUTION:Under travelling of a car, the stepping of an accelerator pedal 1 is detected by an accelerator opening detector 2 to feed a signal through an amplifier 3 to a differential amplifier 4, then the difference against a signal from a throttle valve opening detector 10 is produced to drive a motor 8 thus to control a throttle valve 9. The acceleration of up/down vibration of car is detected by an acceleration level 13 by a subtractor 12 then integrated in an integrator 14, and when the integrated value has exceeded over the referential level 16 the amplification factor of the amplifier 3 is reduced. Consequently the open/close speed of the throttle valve is reduced when travelling on a coarse road resulting in prevension of comfortability and car speed variation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a throttle valve control device for an engine.

-f, ), the engine throttle valve open @ 1 confirmation is when the driver depresses the accelerator pedal, the throttle valve is controlled to open and close according to the movement of the accelerator pedal. In a control device, it is necessary to accurately correspond to the movement of the accelerator pedal and the opening and closing of the throttle valve.By the way, if the accelerator pedal and the throttle valve are connected by a link structure, a wire structure, etc. , Since the movement of the accelerator pedal is transmitted to the throttle valve through reciprocating motion and interlocking rotation, the structure is non-electrical and A-number, and looseness is likely to occur in connecting parts such as links, so the throttle valve There was a problem with the valve crawling or not being very good, and there was also a big problem.
There is a problem in that a large pedal force is required to operate the accelerator pedal 5 due to v-rubbing and the like.

Therefore, as a throttle valve control device that eliminates such problems, conventionally, the movement of the accelerator pedal is controlled by electric power.
There is a so-called 4-stroke system in which the streetcar signal is used to operate an actuator to open and close the throttle valve (Japanese Patent Laid-Open No. 51-1382).
(See Publication No. 35).

And the conventional IT electric control system throttle valve control device d
In consideration of the problem that fuel efficiency worsens with frequent sudden acceleration, the throttle valve opening/closing control in response to accelerator pedal depression does not linearly follow the driver's depression operation, especially the pedal depression speed. The settings have been made so that moderate acceleration is obtained and fuel consumption is not too wasteful. However, by doing this, when the car is driving on a rough road with many ups and downs, even if the driver tries to maintain a constant speed by holding the accelerator in the same way as when driving on a flat road. There has been a problem in that the degree to which the accelerator pedal is pressed varies due to vibrations while the vehicle is running, which causes the vehicle speed to vary.

This invention was made in view of the above-mentioned problems of the conventional art. In the throttle valve control device of the Lt air control system, the opening and closing of the throttle valve is controlled by the H'ft streetcar signal, so the throttle control in response to the depression of the accelerator pedal is controlled by appropriately processing the electric signal applied to the throttle valve. Valve opening/closing i1
+ Focusing on the point that setting the cape characteristics to the desired characteristics is the 8'T function, when driving on a rough road with severe ups and downs, the throttle valve opens and closes slowly in response to the depression of the accelerator pedal. It is an object of the present invention to provide an engine throttle valve i1t control device that prevents fluctuations in vehicle speed due to driving vibrations and the like.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a throttle valve control device for an engine according to an embodiment of the present invention. In the figure, 1 is an accelerator pedal,
2 is an accelerator opening signal a which generates an accelerator opening signal a according to the depression t (depression position) of the accelerator pedal; 3 is normally an accelerator opening signal a; 5. Amplify with the degree of amplification,
When receiving the amplification control signal C, an amplifier amplifies the accelerator opening signal a to an amplification degree of 2 (<kll), and 4 is a differential amplifier that calculates the difference between the output of the amplifier 3 and the throttle opening feedback signal d. Amplifier 5 is a pulse width setting device 6 that sets the pulse width of the pulse signal according to the output of the differential amplifier 4.
7 is a polarity determination circuit that determines whether the polarity of the output of the differential amplifier 4 is positive or negative and outputs a signal f when it is negative; 7 is a polarity determination circuit that outputs the output of the pulse width setting device 5 with the same polarity; Discrimination signal t5 of discrimination circuit 6 - When received, pulse width setting i
Q: a polarity inversion circuit that inverts the polarity of the output of 5; 8 is a DC motor (actuator) that rotates forward or backward to open and close the throttle valve 9 according to the output of the image quality inversion circuit 7; This is a throttle valve opening detector that detects the opening IW of the throttle valve 9 and outputs a throttle opening IW signal d. Also, 11 is an acceleration detector that detects vertical acceleration applied to the vehicle, and 12 is an acceleration detector 11. 1'4 is an integrator that integrates the output of the subtracter 12, and 15 is an integrator that calculates the difference between the output of the integrator 14 and the output of the reference value generation circuit 16. This is a comparator that compares the signals and generates a one-segment width control signal C. The part surrounded by the one-dot chain line in the figure constitutes a control circuit 7, which receives the accelerator opening signal 3 and the output of the acceleration detector 1 and applies it to the vehicle. The acceleration in the accelerator pedal 1 is compared with a set value, and a first drive signal is generated to open and close the throttle slot valve 9 to the normal opening degree according to the depression of the accelerator pedal 1. However, when the /ILI speed is equal to or higher than the set value, a second drive signal is generated to open and close the throttle valve 9 to an opening degree that is smaller than the normal opening degree.

Next, the operation will be explained.

While the car is running, the accelerator opening (φ output device 2 detects the depression position of the accelerator pedal 1 and generates an accelerator opening signal a, and the throttle valve open +? The throttle opening signal d is generated by detecting the opening degree of the valve 9. When the driver depresses the accelerator pedal 1 to accelerate the automobile, the amplifier 3 in the control circuit 17 detects the degree of throttle opening signal d. The accelerator opening signal 3 corresponding to the acid is amplified by the amplification 11kl, and the differential 1?1 amplifier 4 calculates the difference between the output of the amplifier 3 and the throttle opening feedback signal d (b- d), and the pulse width setter 5 sets the pulse width of the pulse signal according to the magnitude of the calculated value I b - d I. At the same time, the polarity discrimination circuit 6 detects the output of the differential amplifier 4 @ It is determined whether the A characteristic is positive or negative, that is, whether it is accelerating or decelerating, but in this case, since it is the 11th speed, the determination signal C is not generated.Therefore, the pulse 1
The output of the signal setting device 5 is applied to the first drive (1) C motor 8 after passing through the polarity reversing circuit 7 as the tm signal, and the DC motor 8 is driven in response to the first drive signal. The throttle valve 9 is rotated in the forward direction to open the throttle valve 9 at a speed that corresponds to the rate of change in the pressing acid of the accelerator pedal/L/1 to an opening corresponding to the pressing acid. The engine opens to the opening degree θl (see the solid line in Figure 2), and as a result, iif increases by 1- during engine intake, and the engine speed also increases, so the car is accelerated to the desired speed. .

Also, the person who cartwheels or presses the accelerator pedal to slow down the car.
When the pedal force of pedal 1 is weakened and the pedal /l/ 1 is returned, the output (b-d) of the differential amplifier 9 becomes negative in the control circuit 17, so the polarity discrimination circuit 6 now outputs the discrimination signal f. is applied to the polarity inversion circuit 7, and the f4 polarity inversion circuit 7 inverts the output of the pulse width setter 5 to a negative number and outputs it as a drive signal of 5:@1. In this case, l) C motor 8 is the first
The throttle valve 9 rotates in the opposite direction in response to the driving signal °, and the throttle valve 9 gradually closes to the opening degree θl at the time of penetration, which corresponds to the depression of the accelerator pedal at that time and the amount of acid. It is decelerated to rz.

By the way, press the throttle valve 9 with the accelerator pedal like this]
If the pedal is opened and closed at a speed that corresponds to the speed of change of the pedal, when the vehicle is driven on a rough road with severe ups and downs, the vehicle will vibrate greatly up and down and the riding comfort will be impaired, as mentioned above. , the vehicle speed will fluctuate, but this problem is solved in the following manner with this device. In other words, the acceleration modulator 11 gives the vehicle an acceleration in the vertical direction of JJ], and in the control circuit 17, the subtracter
2 is the output of the acceleration detector 11 and the reference (16 generation circuit) 3
The information discriminator 14 divides the output of the X-reducer 12, and the output of the mone divider 14 is used as the reference (1) by the comparator 15.
Comparing it with the output of the self-generating circuit 16, when the vehicle is traveling on this important route, the vehicle is subjected to vertical acceleration 1y of the set level A/ or more, and this state continues for some time; is the reference value generation circuit】6 output or higher,
The comparator 15 generates an amplification control signal C, and the amplifier 3 amplifies the accelerator opening signal a by an amplification degree of 2. In this case, the control circuit 17 applies a drive signal =fl2 smaller than the first drive signal to the 1JC motor 8, thereby adjusting the opening degree θ2 of the throttle valve 9 in response to a change in the degree of depression of the accelerator pedal 1. As shown by the one-dot chain line in FIG. 2, the change is smaller than the change in the opening degree θl under normal conditions with respect to the change in depression of the accelerator pedal. Therefore, the throttle valve changes slowly when the accelerator pedal 1 is depressed, and even if the accelerator pedal is operated violently when the accelerator pedal is not needed, it is possible to prevent the vehicle from vibrating up and down significantly. Even if i changes somewhat due to running vibrations, the throttle valve 9 hardly changes, and the vehicle speed does not change either.

Further, Figure @3 shows a second embodiment of the present invention. In the figure, the same symbols as in FIG. 1 indicate the same things as in the same figure, and 18 amplifies the accelerator open If signal a to JIi1 degree.
Normally, the pulse width unit 19 sets the pulse width W of the pulse signal to the pulse width W+ (see the solid line in Fig. 4) according to the output of the differential amplifier 4, and receives the signal °1 ° of the comparator 15. The control circuit 17 is a pulse width setting device that sets the pulse signal to a smaller pulse width W2 (see the one-dot chain line in Fig. 3) than the normal case. ii (responsiveness) and similarly,
It is possible to prevent the riding comfort from being reduced and the vehicle speed to fluctuate when driving on rough roads.

FIG. 5 shows a third embodiment of the present embodiment, and in the figure, 20 is a drive circuit that outputs the first or second drive signal according to the output b of the QlIiii amplifier 3, and 21 is a first drive circuit. Or @
Proportional solenoid (actuator) that opens and closes the throttle valve 9 in response to the drive signal of 2, 22 is the circuit 3.12 to 1
6, 2n 〇In this way, the opening/closing side of the throttle valve 9 is the above-mentioned first and second circuit.
It does not have to be the feedback side leg as in the example of
Further, the proportional solenoid 21 may be used as the actuator for opening and closing the throttle valve 9, and the same effects as in the above two embodiments can be obtained in this embodiment as well.

In the above three embodiments, the vertical vibration (acceleration) of the vehicle was detected to detect the undulations and conditions of the driving road surface, but in addition, the vertical vibration of the tire or the shape of the road surface could be directly detected using sound waves, etc. It may be something that can be detected. Furthermore, in the above embodiment, the control/I... circuit is constituted by a hard circuit, but the one circuit on the open side may, of course, be a software circuit for a microcomputer. Further, the IIv width of the amplifier during driving on a rough road may be changed by 2 to the amplification during normal driving within a range smaller than 1 depending on the accelerator opening signal.

As described above, according to the present invention, in the shoulder air control fI111 type engine throttle pressure control device, the 1d streetcar signal applied to the actuator of the throttle valve is subjected to appropriate signal processing, thereby causing the throttle valve to respond to the depression of the accelerator I pedal. Focusing on the fact that it is possible to set the opening/closing side characteristics to the desired characteristics, when driving on rough roads, the opening/closing operation of the throttle valve is made to slowly change to V when the accelerator pedal is depressed + + c. This has the effect of preventing deterioration of riding comfort and fluctuations in vehicle speed when driving on the road.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram of an engine throttle valve opening n1ll device according to an embodiment of the present invention, FIG. 2 is a diagram showing the accelerator opening/throttle opening characteristics of the above device, and FIG. FIG. 4 is a diagram showing the output characteristics of the pulse width setting device of the above device; FIG. 5 is a circuit diagram of a third embodiment of the present invention. It is. 1...Accelerator I pedal, 2...Accelerator opening detector, 8...I) C motor (actuator), 9...
・・Throttle valve, 1】・・Acceleration adjuster, 17・・
- Control circuit, 21... Proportional solenoid (actuator), 22... Control circuit. Patent applicant: Toyo Kogyo Co., Ltd. Agent: Ken Hayase −

Claims (1)

[Claims] (Old) An accelerator opening detector that outputs an accelerator opening signal according to the degree of depression of the accelerator pedal, and an undulation state 5 of 1 on the vehicle's travel path are detected and output a signal according to the size of the undulation. A road surface detector receives the accelerator opening signal and the detection signal of the road surface detector, and compares the detection output value of the road surface detector with a set value to set the undulations of the road surface (when the detection output value of the road surface detector is 16 or less, the throttle valve is A first drive signal is generated to open and close the throttle valve to the normal opening degree in response to the above-mentioned depression i+1, and when the undulations of the road surface are greater than the set value, the throttle valve is operated to open the throttle valve with a smaller change than the normal opening degree. A throttle valve control for an engine, comprising: a control circuit that generates a $2 drive signal that opens and closes the throttle valve to a maximum of 100 degrees, and an actuator that opens and closes the throttle valve in response to the first or second drive signal. Device.