JPS642819Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a throttle opening control device that controls the throttle opening in conjunction with changes in the accelerator opening.

[Conventional technology]

In conventional throttle valve control devices, even if the accelerator opening degree is kept constant, the vehicle speed changes when running resistance changes, such as when going uphill. To solve this problem, a vehicle running speed adjusting device has been proposed in Japanese Patent Application Laid-Open No. 53-40920. This is done by inputting a signal indicating the actual running speed and a signal indicating the set speed into the regulator and comparing them.
The opening degree of the throttle valve is controlled through a control stage driven by a signal indicating the comparison result output from the regulator, so that the actual traveling speed and the set speed match.

[The problem that the idea aims to solve]

The above-described conventional throttle valve control device has the disadvantage that when the vehicle is intended to travel at a constant speed, it is necessary to change the accelerator opening degree in accordance with changes in running resistance, which is cumbersome. Also,
In the vehicle disclosed in JP-A No. 53-40920, although a constant speed is maintained, this speed is not determined by the accelerator opening, but the traveling speed is changed by acceleration and deceleration. When attempting to do so, it is necessary to change the set speed each time, which has the disadvantage of being more troublesome than when the vehicle speed is normally adjusted by the driver's accelerator operation.

The present invention is a throttle opening control device that allows the driver to adjust acceleration/deceleration by operating the accelerator, and as long as the accelerator opening is kept constant, the vehicle speed can be kept constant regardless of changes in running resistance. The purpose is to provide

[Means to solve the problem]

The throttle opening control device of the present invention includes: an accelerator opening sensor that outputs a signal indicating the accelerator opening; a vehicle speed sensor that outputs a signal indicating the traveling speed of the vehicle; an output of the accelerator opening sensor; and the vehicle speed sensor. a speed increase comparison circuit and a deceleration comparison circuit that respectively input the output of A comparison circuit is operated, and when the target set value is lower than the vehicle speed, the deceleration comparison circuit is operated to output a control signal for controlling the throttle opening so that the predetermined value and the vehicle speed match. and a drive device that receives a control signal output from the control unit and adjusts the throttle opening according to the control signal.

[Effect]

The throttle opening is controlled to determine the actual traveling speed using a speed increase comparison circuit and a deceleration comparison circuit which receive the output of the accelerator opening sensor and the vehicle speed sensor, respectively. That is, the amount of deviation determined by running resistance, etc. is detected from the accelerator opening indicated by the output of the accelerator opening sensor and the vehicle speed indicated by the output of the vehicle speed sensor, using an acceleration comparison circuit and a deceleration comparison circuit, and this value is calculated. is added to the throttle opening determined by the accelerator opening, so the actual traveling speed is constant depending on the accelerator opening.

〔Example〕

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

Fig. 1 is a schematic configuration diagram showing the basic gist of the device of the present invention. Vehicle speed sensor 2 configured to generate an output voltage (see Figure 3)
A control unit 3 receives the output voltage from the accelerator opening sensor 1 and the output voltage from the vehicle speed sensor 2 at a certain accelerator opening and performs the calculations described below, and the output voltage from the control unit 3 performs control. Drive device (servo motor) 4
and a throttle valve 5 whose opening degree is controlled by the motor.

Regarding the control function of the control unit 3, as mentioned above, the output voltages of the accelerator opening sensor 1 and the vehicle speed sensor 2 for each accelerator opening and vehicle speed are specified to change as shown in FIGS. 2 and 3. In addition, the throttle valve opening is specified to change as shown in FIG. 4 with respect to the accelerator opening output voltage shown in FIG. 2, and the throttle valve 5 changes the accelerator opening voltage and The throttle valve is controlled by the throttle valve opening characteristic with respect to the difference between the output voltage and the output voltage corresponding to the varying vehicle speed, that is, the throttle valve is configured to be controlled by two factors.

Next, the operation of this embodiment will be described in the case where a vehicle with a constant accelerator opening is traveling on a flat road at a speed of, for example, 60 km/h. At this time, the accelerator opening is at point a in Figure 2, and the corresponding output voltage is at point b, while the speed at that time is at point c and its output voltage is at point d in Figure 3, and the throttle opening is at point d in Figure 4. The tuttle valve opening is at point e, which corresponds to the output voltage b corresponding to the accelerator opening a. In Figure 5, which shows the throttle valve opening characteristics with respect to the difference between the accelerator opening voltage and the vehicle speed voltage, in this case there is no difference between the accelerator opening voltage and the vehicle speed voltage (because there is no variation in vehicle speed), and in the same figure, f At the point. If the vehicle is now approaching an uphill slope,
Running resistance increases by the slope resistance, and vehicle speed decreases.
At this time, the vehicle speed becomes c' in FIG. 3, and the output voltage of the vehicle speed sensor 2 correspondingly decreases and occupies point g.

On the other hand, since the accelerator opening is kept constant,
The output voltage is b, and there is no difference between b and d on flat ground, but the vehicle speed voltage changes from d to g, and a difference occurs between the accelerator opening voltage and b. When a difference occurs between the vehicle speed voltage and the accelerator opening voltage, the control unit 3 performs control to compensate for the difference, and the throttle valve is further opened by a point h corresponding to d→g shown in FIG. . Therefore, by keeping the accelerator opening constant, it is possible to drive at a constant speed of 60 km/h even when going uphill (without depressing the accelerator pedal).

FIG. 6 shows an embodiment of the configuration of the control unit of the control device according to the present invention, in which the output voltages from the vehicle speed sensor 2 and the accelerator opening sensor 1 are compared and selected via an increase/deceleration comparison circuit, and an output amplification circuit. The throttle valve 5 is controlled by the control unit 3 which outputs an output to a drive device 4 consisting of a servo motor including a potentiometer.

The operation of the throttle valve in response to speed changes when this device is installed is summarized as follows.

1 During acceleration: Accelerator opening voltage > Vehicle speed voltage... Throttle valve open 2 During deceleration: Accelerator opening voltage < Vehicle speed voltage... Throttle valve closed 3 During steady, idling operation: Accelerator opening = Vehicle speed voltage... Same as 4 Racing: Accelerator opening voltage > vehicle speed voltage...
Throttle valve open This automatically corrects fluctuations in vehicle speed when running resistance changes, such as when climbing a hill, making it easier to drive at a constant speed.

[Effect of idea]

Since the present invention is configured as described above, it produces effects as described below.

If vehicle speed changes due to changes in running resistance,
Even without changing the accelerator opening, the output of the control unit that adjusts the throttle opening automatically changes according to the running resistance, making it possible to run at a constant speed. Therefore, it is possible to eliminate the complexity of maintaining vehicle speed by operating the accelerator, and this has the effect of greatly contributing to reducing fatigue, especially when traveling over long distances or with many ups and downs.

Furthermore, the throttle opening during acceleration, which increases the accelerator opening, is larger than the throttle opening determined by the accelerator opening under the control of the control unit, and similarly becomes smaller during deceleration. Responsiveness to the accelerator is also improved.

[Brief explanation of the drawing]

Fig. 1 is a basic configuration diagram of the device of the present invention, Figs. 2 and 3 are characteristic diagrams showing the output voltage for each accelerator opening and vehicle speed, and Figs. 4 and 5 are accelerator opening voltage and accelerator FIG. 6, which is a diagram showing the throttle valve opening characteristic for each difference between the opening voltage and the vehicle speed voltage, is an embodiment showing the configuration of the control unit of the control device according to the present invention. DESCRIPTION OF SYMBOLS 1... Accelerator opening sensor, 2... Vehicle speed sensor, 3... Control unit, 4... Drive device, 5...
...Throttle valve.

Claims (1)

[Claims for Utility Model Registration] An accelerator opening sensor that outputs a signal indicating the accelerator opening; a vehicle speed sensor that outputs a signal indicating the traveling speed of the vehicle; the output of the accelerator opening sensor and the output of the vehicle speed sensor. and a speed increase comparison circuit and a deceleration comparison circuit that respectively input the speed increase comparison circuit and the speed increase comparison circuit when the target setting value indicated by the output of the accelerator opening sensor exceeds the vehicle speed indicated by the output of the vehicle speed sensor. and when the target set value is lower than the vehicle speed, the deceleration comparison circuit is operated to output a control signal for controlling the throttle opening so that the predetermined value and the vehicle speed match. 1. A throttle opening control device comprising: a throttle opening control unit; and a drive device that receives a control signal output from the control unit and adjusts the throttle opening according to the control signal.