JPH0332422Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an engine stop prevention device during braking.

BACKGROUND OF THE INVENTION Manual clutch vehicles have been widely used in automobiles, in which a clutch provided in an engine's drive power transmission system is turned on and off by operating a clutch pedal.

Also, to prevent wheel slipping during sudden braking,
An anti-skid brake device that detects wheel deceleration and wheel rotation speed and controls the increase or decrease of brake fluid pressure in a brake device using the detected signals has been developed in the past (for example, see Japanese Patent Application Laid-Open No. 59-32549). , has already been put into practical use.

Problems that the invention aims to solve: The general manual clutch vehicle mentioned above has the problem that if you forget to press the clutch pedal because you are distracted by the brake when operating the brake, the engine may stall. ing.

Furthermore, even if an anti-skid brake device is installed, if the vehicle is a manual clutch vehicle, if the brakes are suddenly applied on a road with a low coefficient of friction, such as a snowy road, the wheel rotational speed will drop rapidly and the wheels will almost lock up. In such a case, the clutch pedal may not be depressed in time, which may cause the engine to stall.

The main purpose of the present invention is to solve the above-mentioned problems in manual clutch vehicles.

Means for Solving the Problems The present invention provides an actuator for turning on and off the clutch in a manual clutch automobile separately from the clutch pedal, detects the depression of the brake pedal, stores it, and stores it in memory. Actuator drive control that operates the actuator to turn off the clutch when the wheel rotational speed falls below a set value or when the anti-skid brake device is activated, and releases the memory by a signal from the accelerator pedal or the clutch pedal. The feature is that a circuit is provided.

Function The present invention adopts the above-mentioned configuration, so that when the wheel rotation speed during braking falls below a set value equivalent to a vehicle speed of 2 to 4 km/h, or when the anti-skid brake system is activated, the clutch is automatically activated. Even if you forget to press the clutch pedal or do not press the clutch pedal in time, problems such as the engine stopping will not occur.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

The attached diagram shows an example in which the present invention is applied to a manual clutch vehicle equipped with an anti-skid brake device. In Figure 1, 1 is an accelerator pedal switch that detects the depression of the accelerator pedal and issues a Hi signal, and 2 is an accelerator pedal switch that detects the depression of the accelerator pedal and issues a Hi signal. The brake pedal switch detects when the brake pedal is depressed and issues a Hi signal, and 3 detects when the clutch pedal is depressed.
This is a clutch pedal switch that emits a Hi signal, and the output signals from the accelerator pedal switch 1 and clutch pedal switch 3, that is, the Hi signal when each pedal is depressed and the Lo signal when the pedal is not depressed, are sent to each inverter 4 and 5. be reversed.

A, B, C, and D are wheel rotation speed sensors for the front, left, and right wheels, each consisting of a combination of a toothed wheel and a proximity switch;
The output signals of C and D are converted into analog quantities by the D/A converter 6a of the comparison means 6, which consists of a D/A converter 6a, an adder 6b, a comparator 6c, and a reference voltage generator 6d, and then sent to the adder 6b. The average value output is determined by the comparator 6c, and the average value output is determined by the vehicle speed 2.
It is compared whether the voltage is higher than or lower than the reference voltage of a reference voltage generator 6d which generates a reference voltage corresponding to about 4 km/h, and if it is lower than the reference voltage, it is configured to issue a Hi signal.

On the other hand, the anti-skid brake device 7 detects a sign of wheel lock based on the output signals of the wheel rotational speed sensors A, B, C, and D and controls the brake fluid pressure by a brake fluid pressure control system (not shown). The brake operation signal is sent to the accelerator pedal switch 1, brake pedal switch 2,
Together with the signals from the clutch pedal switch 3, the two inverters 4, 5 and the comparison means 6, a latch circuit 8a, a first AND element 8b having three input terminals, a second AND element having two input terminals The signal is input to an actuator drive control circuit 8 comprising an AND element 8c, an OR element 8d having two input terminals, an amplifier 8e, and a relay switch 8f.

That is, the output signal from the brake pedal switch 2, that is, the Hi signal when the brake pedal is depressed, is held by the latch circuit 8a,
The held output signal of the latch circuit 8a is input to the first AND element 8b together with the output signals of the two inverters 4 and 5, and the output signal of the comparison means 6 is input to the anti-skid of the anti-skid brake device 7. The output signal of the OR element 8d is input together with the brake operation signal to the second AND element 8c, and the output signal of the OR element 8d is input together with the output signal from the first AND element 8b.
The output signal is configured to operate a relay switch 8f via an amplifier 8e, and the operation of the relay switch 8f switches an actuator 9 that turns on and off a clutch (not shown).

The Hi signal of the brake pedal switch 2 held in the latch circuit 8a is determined by the Hi signal of the accelerator pedal switch 1 issued by pressing the accelerator pedal or clutch pedal after the holding, or the Hi signal from the clutch pedal switch 3. It will be reset.

In the above, when the brake pedal is depressed but the accelerator pedal and the clutch pedal are not depressed, the latch circuit 8a is latched by the Hi signal from the brake pedal switch that detects the depression of the brake pedal, memorizes the Hi signal, and the accelerator pedal The Lo signals generated by the switch 1 and the clutch pedal switch 3 are inverted by the inverters 4 and 5 and become Hi signals. All three input signals applied to the first AND element 8b become Hi signals, so the first AND element 8b 8b issues a Hi output signal.

At this time, when the wheels are rotating at a low speed, the output signal of the adder 6b that outputs the average value of the output signals from the wheel rotation speed sensors A, B, C, and D is below the reference voltage, or the anti-skid brake device 7 is in the anti-skid state. When the skid brake activation signal is being output, the output signal of OR element 8d becomes Hi.
The second AND element 8c emits a Hi signal, turns on the actuator 9 that controls the on/off operation of the clutch via the amplifier 8e and the relay switch 8f, and turns off the clutch (not shown), which may cause the engine to stall. Nothing happens.

Further, when the accelerator pedal is depressed for acceleration or the clutch pedal is depressed for gear change after the brake pedal is depressed, the latch operation of the latch circuit 6 is released (reset), so that the third AND element 8b of the first AND element 8b is depressed. The input signals applied to at least two of the input terminals become Lo, and the output signal of the first AND element 8b becomes Lo, so the output signal of the second AND element 8c also becomes Lo, and the output signal causes the amplifier 8e to become Lo. The operation of the actuator 9 driven via the relay switch 8f is stopped, and if the accelerator pedal is depressed, the clutch is switched to the on side and normal speed increasing operation is performed, and if the clutch pedal is depressed, the clutch is switched on. The clutch remains off when the pedal is depressed.

FIG. 2 is a flowchart showing the above operation.

If the device of the present invention is to be applied to a manual clutch vehicle that is not equipped with an anti-skid brake device, the OR element 8d may be omitted; in this case, the first AND element 8b having three input terminals may be omitted.
Of course, instead of using the second AND element 8c having two input terminals, one AND element having four input terminals may be used.

Effects of the invention As described above, according to the invention, if a manual clutch vehicle is equipped with an anti-skid brake device or not, it is possible to forget to depress the clutch pedal when braking. , problems such as engine stalling due to delays in the timing of pressing the clutch pedal, etc. are completely prevented, and even people who are inexperienced with driving can drive with confidence.Coupled with the simple configuration, This has brought about great practical effects.

[Brief explanation of drawings]

Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a flowchart showing the operating status of the present invention. 1... Accelerator pedal switch, 2... Brake pedal switch, 3... Clutch pedal switch, 4, 5... Inverter, 6... Comparison means, 7
... Anti-skid brake device, 8 ... Actuator drive control circuit, 9 ... Actuator,
A, B, C, D...Wheel rotation speed sensor.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a manual clutch automobile in which the rotation of the engine is transmitted to the transmission via a clutch that is turned on and off by depressing the clutch pedal, the clutch is turned on and off separately from the clutch pedal. An actuator is provided to perform the operation, detects depression of the brake pedal, stores it, and turns the clutch off when the wheel rotational speed becomes less than a set value or when the anti-skid brake device is activated during the memorization. An engine stop prevention device during braking, characterized in that an actuator drive control circuit is provided for activating the actuator and canceling the memory in response to a depression signal of an accelerator pedal or a clutch pedal. (2) The actuator drive control circuit includes a latch circuit which stores and outputs a signal from a brake pedal switch that detects the depression of the brake pedal, and whose memory is released by a signal from the accelerator pedal or clutch pedal; A first AND element that emits an output signal when an AND condition is established between the output of the circuit, a signal that the accelerator pedal is not depressed, and a signal that the clutch pedal is not depressed, and the output voltage of the wheel rotation speed sensor are set. An output signal is generated by either the output signal of the comparing means which generates an output signal when the rotation speed is compared with a reference voltage corresponding to the rotation speed or is smaller than the reference voltage, or the anti-skid brake activation signal generated by the anti-skid brake device. an OR element that generates an output signal; a second AND element that generates an output signal when an AND condition of both the output signals of the first AND element and the OR element is satisfied; and the output signal of the second AND element causes the actuator to be in a clutch-off state. The apparatus for preventing engine stoppage during braking as set forth in claim 1 of the registered utility model, characterized in that it comprises a relay switch to be operated.