JPS5911455B2 - Automobile clutch automatic control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a novel latch automatic transmission system that can provide automatic clutch operation functions similar to those of automatic specification cars by making slight modifications to automobiles with normal gear transmissions. A control device is provided.

That is, the present invention operates the clutch pedal by combining two elements: the movement of the accelerator pedal and the rotational speed of the engine.One embodiment of the present invention will be described based on the drawings. An engine speed detection circuit 1 is configured to derive the engine speed from the ignition operation of the engine and to output, for example, a -pulse for each revolution of the engine.

2 is a frequency/voltage conversion circuit into which the output pulses of the engine rotation speed detection circuit 1 are input;
It is configured to output a voltage according to the input frequency (engine speed), that is, the input frequency. Therefore, when the input frequency (engine speed) is low, it outputs a low voltage and outputs a voltage corresponding to the input frequency (engine speed). The output voltage is increased as the voltage gradually increases.

Furthermore, this frequency/voltage conversion circuit 2 is equipped with a volume 3 for selecting the engine rotation speed at the time the clutch is engaged, and the conversion ratio in the frequency/voltage conversion circuit 2 is determined by selecting the engine rotation speed using this volume 3. is configured to be variable.

Further, the frequency/voltage conversion circuit 2 is configured to output a constant low voltage and send it to the servo motor 4 even when the input frequency is zero, that is, the engine speed is zero.

A servo motor 4 to which the output voltage of the frequency/voltage conversion circuit 2 is applied is attached to the vehicle body 14 side.
The movable arm 5 and the clutch pedal 6 are connected by a link 7, and when the above-mentioned low voltage is input to the servo motor 4, the movable arm 5 rotates and pulls the clutch pedal 6 via the link 7. As the clutch is disengaged and the input voltage from the frequency/voltage conversion circuit 2 increases, the movable arm 5 rotates in the opposite direction, thereby causing the clutch pedal 6 to move back in the direction of engaging the clutch.

A differential circuit including a resistor 9 and a switch 10 is interposed in the line 8 connecting the servo motor 4 and the frequency/voltage conversion circuit 2. The switch 10 is turned on when the foot is pressed down, and turned off when the foot is released.

Now, when the automobile is in a stopped state, the servo motor 4 is not energized, so the clutch pedal 6 is returned by the spring force, and the clutch is therefore disengaged.

From this state, select the engine rotation speed at which the clutch engages (for example, 1200 rotations) using the volume 3 and set the conversion rate of the frequency/voltage conversion circuit 2. Then, start the engine and turn on the switch 2a of the frequency/voltage conversion circuit 2. When turned on, the circuit 2 is configured to output a constant low voltage even if the engine speed is zero, that is, the input frequency is zero, so that low voltage is applied to the servo motor 4, The movable arm 5 of the servo motor 4 rotates and pulls the clutch pedal 6 via the connecting rod 7, immediately disengaging the clutch.

Next, when the gear is set to low using the shift lever and the accelerator pedal 11 is depressed, the switch 10 is turned on and the engine speed begins to gradually increase, and the output voltage of the frequency/voltage conversion circuit 2 gradually increases. Therefore, the movable arm 5 of the servo motor 4 rotates in the opposite direction and the clutch pedal 6
will be brought back into action.

Then, when the engine speed reaches the aforementioned selected 1200 revolutions, the output voltage of the frequency/voltage conversion circuit 2 reaches a predetermined value (for example, 12V), and the clutch pedal 6 moves back until the clutch is fully engaged. , so the car starts moving.

Also, when the car starts running and the next gear change is to be performed, the accelerator pedal 11 is released.

Then, the switch 10 is turned off, so the output of the frequency/voltage conversion circuit 2, which had previously passed through the switch 10, now flows through the resistor 9, causing a voltage drop at the resistor 9.

For this reason, even though the engine speed is high and therefore the output voltage of the frequency/voltage conversion circuit 2 is high, the voltage applied to the servo motor 4 drops rapidly, causing the movable arm 5 to rotate and move the clutch in the direction of disengaging the clutch. Pull pedal 6,
Now you can change gears while operating the clutch.

Also, adjust the engine speed to 120 by adjusting the volume 3.
If the rotation is changed from 0 rotation to 1500 rotation, the frequency/voltage conversion circuit 2 outputs a predetermined voltage of 12V when the engine rotation speed reaches 1500 rotation by switching the frequency-to-voltage conversion ratio linked to the volume 3. Since the clutch is engaged when the engine speed is 1,500 rpm, the engine speed at which the clutch is engaged can be adjusted to the desired speed.

Incidentally, unless the switch 2a of the frequency/voltage conversion circuit 2 is turned on, the circuit shown in FIG. 1 will not work, and therefore the clutch operation can be inputted by the pedal force as before.

In consideration of this input operation, the present invention divides the connecting rod 7 that connects the clutch pedal 6 and the movable arm 5 into two as shown in FIG.
A connecting rod 7b connected to the movable arm 5 is connected to the cylinder 12.
A piston rod-like protrusion is provided at the tip of the piston rod to prevent it from coming off.

By doing so, when the clutch pedal 6 is depressed, the amount of depression is absorbed by the cylinder 12 and is not transmitted to the movable arm 5.

Furthermore, since a diesel engine does not have an ignition circuit, it is sufficient to extract the engine rotational speed by other suitable means and convert it into pulses.

As described above, the present invention adds an automatic clutch function equivalent to an automatic specification car to a car with a normal gear transmission, and when the engine speed reaches a predetermined speed by depressing the accelerator pedal The pedal can be driven by a servo motor to automatically engage the clutch, and by loosening the accelerator pedal, the switch is turned off and the output voltage of the frequency/voltage conversion circuit is lowered by a resistor, thereby automatically engaging the clutch. Since the clutch pedal is not required to operate the clutch pedal when starting the car or changing gears, the original purpose can be achieved satisfactorily.

Moreover, since the automatic clutch operation is performed by moving the clutch pedal, there is an advantage that only a slight modification is required for an automobile having a conventional gear transmission.

Also, since the frequency/voltage conversion circuit has a volume that varies the frequency and voltage conversion rate, by adjusting this conversion rate, the engine speed when the clutch is engaged can be set to the speed desired by the driver. There are advantages.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, and FIG. 2 is a partial cross-sectional configuration diagram of the main part. 1...Engine speed detection circuit, 2...
・Frequency/voltage conversion circuit, 3...Volume, 4
... Servo motor, 6 ... Clutch pedal, 8 ... Voltage supply in, 9 ...
Resistor, 10... Switch, 11...
Accelerator pedal.

Claims (1)

[Claims] 1. A servo motor that pushes and pulls the clutch pedal in the clutch engagement/disengagement direction in response to increases and decreases in supply voltage, and an engine rotation speed detection circuit that detects the engine rotation speed in a pulsed manner.
A frequency/voltage conversion circuit that converts the engine rotational speed into a servo motor supply voltage corresponding to the rotational speed and has a volume that varies the conversion rate; An automatic clutch control device for an automobile, including a switch interposed in a voltage supply line and a parallel circuit of a resistor, the switch being configured to be turned on when an accelerator pedal is depressed.