JPS5910753A - Engine throttle valve controller - Google Patents

Abstract

PURPOSE:To insure quick acceleration by detecting the abrupt accelerator operation frequency and deciding whether the driver is abrupt acceleration oriented or fuel saving oriented and increasing the speed variation of throttle valve opening if the driver is abrupt acceleration oriented. CONSTITUTION:Under travelling of 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 detector 10 is produced to drive a motor 8. The output from said detector 2 is provided to a differentiator 11 to count the frequency of speed change higher than the referential value by means of a counter 18 and upon reaching the frequency more than the predetermined value, it is decided that the driver is abrupt acceleration oriented and further abrupt stepping of accelerator pedal will cause to increase the amplification factor of the amplifier 3 by means of a signal from AND gate 22, thus to open the throttle valve 9 widely with abrupt speed variation thereby sufficient acceleration is achieved, while when the driver is fuel saving oriented, it is opened slowly to drive with good fuel consumption.

Description

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

In general, an engine throttle valve control device controls the opening and closing of the throttle valve according to the movement of the accelerator pedal when the driver depresses the accelerator pedal. It is necessary to accurately match the movement with the opening and closing of the throttle valve. However, if the accelerator pedal and the throttle valve are connected by a link mechanism, wire mechanism, etc., the movement of the accelerator pedal is transmitted to the throttle valve through reciprocating motion or rotational motion, which makes the structure extremely complicated. Moreover, because the links and other connecting parts tend to rattle, there is a problem that the throttle valve's follow-up performance is not very good, and furthermore, due to the large amount of chafing, it takes a lot of force to operate the accelerator pedal. There is a problem with requiring it.

Therefore, as a throttle valve control device that has solved this problem, we have developed a so-called electric control system that extracts the movement of the accelerator pedal as an electric signal and uses this electric signal to operate an actuator to open and close the throttle valve. There is (JP-A-51-138'2
(See Publication No. 35).

In the conventional electrically controlled throttle valve control device, in consideration of the problem that fuel efficiency worsens with frequent rapid acceleration, the opening and closing control of the throttle valve in response to the depression of the accelerator pedal is controlled by the driver's depression operation, especially when The setting is not one that follows the pedal stroke in a straight line, but one that provides appropriate acceleration and does not significantly worsen fuel consumption. However, you can get a tJ acceleration feeling that is satisfying for those who want to feel a sense of acceleration, so-called sudden acceleration-oriented driving sounds, and conversely, those who do not require much acceleration but want to improve fuel efficiency. However, there has been a problem in that it is not possible to obtain a satisfactory fl fuel efficiency for so-called fuel economy-oriented drivers.

The present invention has been made in view of the above-mentioned conventional problems.In the above-mentioned electrically controlled throttle valve control device, the opening/closing side ml of the throttle valve is controlled by electric signals. Focusing on the fact that it is possible to set the opening/closing control characteristics of the throttle valve in response to the depression of the accelerator pedal to the desired characteristics by appropriately processing the electrical signals applied, the system detects the frequency of sudden accelerator operations. By determining whether the driver is oriented towards rapid acceleration or fuel efficiency based on the frequency of the lever, and changing the opening/closing speed of the throttle valve according to the result,
It is an object of the present invention to provide a throttle valve control device for an engine that performs driving in pursuit of either acceleration or fuel efficiency depending on the driver's habit of accelerator operation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an engine throttle valve control device according to an embodiment of the present invention. In the figure, 1 is an accelerator pedal,
2 is an accelerator opening degree detector that generates an accelerator opening signal a according to the amount of depression (depression position) of the accelerator pedal 1; 3 is normally an accelerator position of 1 m; If signal 3 is amplified by an amplification degree of 1; When receiving the signal C, an amplifier amplifies the accelerator opening signal a by an amplification degree of 2()kQ; 4 is a differential amplifier that calculates the difference between the output of the amplifier 3 and the feedback signal d of the throttle opening; 5 is a pulse width setting device that sets the pulse width of the pulse “r” according to the output of the differential amplifier 4;
6 is a polarity discrimination circuit that determines whether the polarity of the output of the differential amplifier φIA device 4 is positive or negative and outputs a signal f when it is negative; 7 is a polarity discrimination circuit that normally outputs the output of the pulse 1 output device 5 with the same polarity. 8 is a polarity inversion circuit which inverts the polarity of the output of the pulse width setter 5 and outputs it when it receives the discrimination signal f of the polarity discrimination circuit 6; A motor (actuator) 1) rotates in the opposite direction to open and close the throttle valve 9, and 10 is a throttle valve opening detector that detects the opening of the throttle valve 9 and outputs a throttle opening signal d.

Further, 11 is a differentiator that differentiates the output 3 of the accelerator pedal position detector 2, and 12.13 is a differentiator that differentiates the output 3 of the accelerator pedal position detector 2; 16 is a gate signal generation circuit that generates a gate signal g for a set time after the vehicle starts; A gate circuit 18 is open while receiving the gate signal K and allows the output of the ratio secondizer 12 to pass through. A gate circuit 18 counts the output signal 1 of the comparator 12 that has passed through the gate circuit 17, and calculates the frequency of occurrence of the sudden acceleration state. counter to detect,
19 is a reset signal generation circuit that applies a reset signal r to the counter 18 when the car is stopped; 20 is a digital comparator that compares the output of the counter 18 with the output of the reference value generation circuit 21; and 22 (4). This is an ANI) circuit which uses the output of the digital comparator 20 and the output of the comparator 13 by two people and generates a signal C during sudden acceleration. A control circuit 23 is constituted by the part surrounded by a dashed line in the figure.The control circuit 23 receives the accelerator opening signal a and controls the rate of change of the amount of depression of the accelerator pedal 1 to a predetermined value (11 or more). The frequency of occurrence of the sudden acceleration state is determined, and a first drive signal is generated that normally causes the throttle valve 9 to open at a slow rate of change in accordance with the amount of depression of the accelerator pedal 1. -1 when above and in the above rapid acceleration state
- Generates the second drive signal E which opens the throttle valve 9 at a rapid rate of change.

Next, the operation will be explained.

Self? J+tun;, l2? '>, the accelerator opening detector 2 detects the amount of depression of the accelerator pedal 1 (interval 1 position M) and generates an accelerator opening of 4Hj 1a, and the throttle valve opening detector 10 detects the accelerator opening 4Hj 1a. It detects the speed of the engine and throttles 1 IM (,; No. 5 d is the principal. Then, the driver presses the accelerator pedal 1 in order to speed up the car. In the 1I11 circuit 23, the amplifier 3 amplifies the accelerator opening signal λ corresponding to the pedal depression with an amplification degree of 1, and the differential amplifier 4 outputs the output 1) of the amplifier 3 and the throttle opening signal λ. i&(b-d) with the feedback signal d is calculated, and the pulse width setter 5 sets the pulse width of the pulse signal according to the magnitude 1b-dl of the calculated value. At the same time, the polarity determining circuit 6 determines whether the polarity of the output of the differential amplifier 4 is positive or negative, that is, whether it is during acceleration or deceleration, but in this case, since it is during acceleration, it does not generate the determination signal f. Therefore, the output of the pulse width setter 5 is applied to the DC motor 8 after passing through the polarity reversing circuit 7 as a first drive signal with its polarity unchanged.
1) The C motor 8 rotates forward in response to the first drive signal and opens the throttle valve 9 at a slow rate of change. In this way, the throttle valve 9 opens at a gradual rate of change to the opening degree corresponding to the amount of depression of the accelerator pedal 1, and accordingly, the intake air flow of the engine increases and the engine speed also increases. will be smoothly accelerated to the desired speed.

In addition, when the driver weakens the pedal force on the accelerator pedal 1 to decelerate the vehicle and the pedal 1 is depressed, the control circuit 2
3, the output (b-d) of the differential amplifier 4 becomes negative, so the polarity discrimination circuit 6 applies the discrimination signal f to the polarity inversion circuit 7, and the Fc polarity inversion circuit 7 changes the pulse width. The output of the setter 5 is inverted to a negative value and outputted as the lth drive signal. Then, in this case, the DC motor 8 is the first drive 1.1
The throttle valve 9 rotates in the opposite direction depending on the number, and the throttle valve 9 gradually closes to the opening degree corresponding to the depression of the accelerator pedal 1 at that time, thereby smoothly decelerating the automobile to the desired speed.

In this way, the main reason for 11B is that when the driver operates the accelerator slowly, opening and closing the throttle/sotol valve 9 at a gentle rate of change will cause the engine rotation to become OFF-oriented. The number increases and decreases smoothly, and the tS combustion noise in 1st gear is 71.

By the way, with such a fuel efficiency rate of 17), (well, the acceleration is slow, so the speed feeling of L IJII will be satisfied for those who feel the acceleration.) However, in the case of water equipment, operation g f)
4. If the person accelerates m/j times, control is performed to obtain acceleration performance. That is, side tilt 1 circuit 23
(Here, the divider 11 uses f, , as the accelerator opening signal a(
The rate of change of the accelerator pedal is detected by differentiating FIG. 2 (see al), and the comparators 12 and 13 output h(
2nd +1 (b) Reference 1 (6) and reference value generation circuit 14
, 15 output e (see Figure 2 (1), broken 1 gland). Then, detect a sudden acceleration state in which the rate of change in the amount of depression of the accelerator pedal 1 exceeds a predetermined value N //
+, the comparator 12 applies the signal 1 to the gate circuit 17,
This gate circuit 17 receives the gate signal from the gate signal generating circuit 16 and remains open for a predetermined period of time after the automobile starts, and allows the signal 1 to pass through during that period. Then, the counter 18 counts the signal 1 that has passed through the gate circuit 17 to determine the frequency of sudden acceleration, and the digital comparator 20 compares the count value with the output of the reference value generation circuit 21. For example, if the signal of the comparator 12 1 υ) dies or dies more than the set number of times during the predetermined time period, the output of the digital comparator 20 becomes 1 constantly, and the rear driver When the accelerator pedal 1 is pressed down rapidly and the output of the comparator J3 becomes 1, the circuit 22 ANDs the output ``1'' of the comparator 13 and the output 1 of the digital comparator 20. Since the amplifier 3 receives the sudden acceleration signal C and amplifies the accelerator opening signal 3 by an amplification degree of 2, the control circuit 23 generates a second drive signal, The throttle valve 9 opens wide at a rapid rate of change. When the accelerator pedal 1 comes close to the desired depression position, the rate of change in the degree of depression slows down and the output of the comparator 13 becomes "0". A N l) The circuit 22 stops generating the sudden/Jll speed signal C]2, and the amplification degree of the Ju11 amplifier 3 returns from 2 to +, and its output 1) also changes slightly.

At this time, the throttle *'p 9 is changed to the W; (corresponding to the 7 incl.
Therefore, the output polarity of the differential amplifier 4 is negative and l.
'S, the DC motor 8 rotates in the opposite direction and slowly closes the throttle valve 9 until the opening IW corresponding to the depression of the accelerator pedal l (-). In this way, the throttle valve 9 opens sharply and widely, and then the accelerator pedal is depressed (-). Corresponds to ten companies in 1
lJ (for changes in engine speed, j
[There is a delay in the number of rotations, and the rotation speed first rapidly reaches around the desired rotation speed, and then slowly decreases to the desired rotation speed (therefore, the car accelerates rapidly and then slowly reaches the desired speed. Each will also be attached.

In addition, when the vehicle stops due to waiting at a traffic light or for other reasons when the vehicle is in one of the following conditions, the reset signal generation circuit 19
generates a reset signal r to reset the counter 18, the sudden acceleration oriented driving state is canceled and the fuel consumption oriented driving state returns. When the automobile starts, the control circuit 23 (1) again detects the frequency of sudden acceleration in the same manner as described above, and performs sudden acceleration-oriented driving or fuel consumption-oriented driving depending on the degree of dregs.

In this way, if a person who feels acceleration is driven by someone who frequently performs sudden acceleration operations, the driver's preference for sudden acceleration will be lower than the redundant Jyi degree of the sudden acceleration operation of accelerator pedal 1. Since the throttle valve 94 opens at a rapid rate of change and performs a sudden 1J11 speed directional rotation, quick acceleration can be achieved.

Further, the third section I shows a second embodiment of the present invention. In the figure, the same reference numerals as No. 1 and 1 indicate the same things as in the same figure,
24 is a driving amount t? which generates the first or second driving signal according to the output of the amplifier 3. L25 is a proportional solenoid (actuator) that opens and closes the throttle J1'9 in response to the first or second drive signal.

In this way, the opening/closing control of the throttle valve 9 does not need to be feedback control as in the first embodiment described in Section 2, and the proportional solenoid 25 may be used as the actuator for opening/closing the throttle valve 9. Even in the example
It is possible to obtain the same effects as in the second embodiment.

Note that in the above two embodiments, the base t is used to detect the acceleration state.
The reference values e set for the QQ value original principals 14 and 15 are set to the same value 111'l, but they do not necessarily have to be the same value. Furthermore, although the control circuit 23 is formed by a hard circuit, the control circuit 23 may of course be formed by using a microcomputer with a soft groove. Instead of keeping the width constant by 1, it may be varied by 16 depending on the opening degree of the accelerator pedal.

Furthermore, in the above embodiment, during sudden acceleration-oriented driving, the throttle valve is opened very suddenly to an opening degree corresponding to or more than the accelerator pedal depression, and then closed to the opening degree corresponding to the depression kJ. In the present invention, when driving for rapid acceleration, the throttle valve may be suddenly opened to an opening corresponding to the depression of the accelerator pedal (for one day), and then held at that opening.

As described above, according to the present invention, when the throttle of an engine is electrically controlled, the accelerator pedal is not depressed by appropriately processing the air signal applied to the throttle valve actuator. Focusing on the fact that the opening/closing side of the throttle valve can set the V characteristic to the desired characteristic, the frequency of sudden accelerator operation can be detected to determine whether the driver is suddenly oriented towards Jll iM or fuel efficiency. If the driver is looking for sudden acceleration, the speed of change in the throttle IP opening is increased, and if the driver is looking for fuel efficiency, the speed of change is made smaller. This has the effect of providing good fuel efficiency for drivers who are fuel-efficient.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram of an engine throttle valve control device according to an embodiment of the present invention, and FIGS. Fig. 3 is a circuit configuration diagram of another embodiment of the present invention. 1...Accelerator medal, 2...Accelerator opening detector, 8...I)C motor (actuator), 9...・
Throttle valve, 23...control circuit, 25...proportional solenoid (actuator).

Claims (1)

[Claims] (]) ゛T accelerator opening degree detector that outputs accelerator opening Iy iM 4g according to the amount of depression of the accelerator pedal;
Depress the accelerator pedal in response to the accelerator opening information above.
Find the frequency of occurrence of a sudden acceleration state in which the rate of change of is equal to or higher than a predetermined value, and normally use the first drive signal as the basis for the first drive signal that causes the throttle valve to open at a slow rate of change in accordance with the amount of depression described above. a control circuit that generates a second drive signal 46 that opens the throttle valve at a rapid change speed IN when the frequency is equal to or more than the number of times the motor vehicle is running and is in a rapid acceleration state; 1. An engine throttle valve control device 1x0, characterized in that it is equipped with an actuator for opening and closing the throttle valve.