KR940009979B1 - Auto-clutch device for a vehicle - Google Patents

Abstract

By using compressed air controlled by electrical control unit and compressed by clutch booster, stick-car drivers need not keep the clutch pedal being pressed on, in low speed. When the speed or engine's rpm goes down under a limit, these data inputted to electrical control unit. As the clutch status is not neutral, the control unit turn off the first solenoid valve (4) and turn on the second solenoid valve (5) to change the status of clutch neutral. This mechanism offers manufal mode (control the clutch by foot) too.

Description

Automotive clutch device and method thereof

1 is a configuration diagram of an embodiment of an automatic clutch device according to the present invention.

2 is a cross-sectional view of the internal structure of a pneumatic cylinder applied to the apparatus of the present invention.

3 is an operating state diagram of the apparatus of the present invention.

4 is a block diagram of a control device applied to the device of the present invention.

5 is a flow chart for explaining the operation of the method of the present invention.

* Explanation of symbols for main parts of the drawings

1: pneumatic cylinder 2: piston

3, 3 ': Air cylinder 4, 5: Solenoid valve

6: check valve 7: clutch cable

8, 8 ': air tube 9: shrinking tube

10: control device 20: switch input unit

21: speed signal input unit 22: memory

23: central processing unit 24: duty control unit

TSW, MSW, ASW, CSW: Each function switch

The present invention relates to a clutch of a vehicle that regulates the power of the engine transmitted to the transmission of the vehicle as needed, and in particular, the compressed air as a power source to operate the clutch automatically according to the engine speed and the vehicle speed. The present invention relates to an automobile clutch device and a method for preventing the inconvenience and fatigue of driving operation that frequently operates the upper clutch.

In general, a vehicle is provided with a clutch device that shuts down engine power at every gear shift and maintains engine power connected to the propulsion shaft at the time of acceleration, and is configured to be operated as a driver's foot whenever necessary. Such a clutch device is immediately stopped when the vehicle is stopped except for the neutral state of the transmission after the engine is started or when the clutch pedal is not pressed when the engine and the driving speed are extremely low.

Therefore, when the gear is in the state where the gear on the driving spindle and the gear on the sub-axis are engaged, the clutch pedal should always be bright to prevent the engine from starting.

However, these clutch devices are not only inconvenient to the driver in the situation where they are frequently operated by complicated road bottlenecks or frequent traffic lights, but also can cause fatigue on the driver's knees and ankles when the clutch pedal is operated for a long time. There was a buildup piled up.

In order to solve the above closed end, there is a patent application No. 87-14085 (name: vacuum power unit for automobile clutch), which was previously filed with the Korean Intellectual Property Office, that is, the present invention uses an upper and lower solenoid valve operation switch on a gear shift lever. If the operation switch is touched by hand every time the gear is shifted, the air passage is opened by the retraction action of the operating rod installed on the solenoid valve, and the clutch pedal is operated by operating the piston with the air flowing into the vacuum chamber.

However, in this device, the solenoid valve actuating switch is turned on at every gear shift so that the clutch can be operated by simply operating the driver's foot. In addition, the clutch pedal is operated by connecting the momentum of the piston between the link-type operation. This also causes the solenoid valve operation switch installed on the gear shift lever to be continuously operated as if the clutch pedal is stepped with the foot while the vehicle is stopped. It will give you inconvenience to be warmed up.

In addition, the present invention is to install a vacuum switch on the inner side wall of the vacuum chamber to turn off the solenoid valve to shut off the solenoid valve by the contraction action of the bellows installed by the switch plate by the continuous suction force of air while the piston is moved completely backward As a result, it takes a long time until the inside of the vacuum chamber where the vacuum switch is installed is completely vacuumed and a time when the bellows are contracted in the vacuum state, which leads to a long period of clamping the clutch pedal, as well as a vacuum inside the vacuum chamber. This is caused by another problem that makes it difficult to install switches and power lines.

Accordingly, the present invention has been drawn to solve the above-mentioned general problems, the purpose of which is to use a plurality of input information (shift switch signal, engine speed, running using the compressed air of the clutch booster operated by compressed air) Electronically (program) controls a plurality of solenoid valves so that the clutch is automatically operated without the driver's manual operation even when the engine speed and driving speed drops below a certain level or the vehicle is stopped while the gear is in the state. It is to provide an automatic clutch device and method that can provide a convenient advantage, such as to reduce the use of the driver's foot as well as the hand to reduce the fatigue by allowing the enforcement.

In addition, another object of the present invention is configured to be capable of using both automatic or manual operation (clutch operation performed by foot as in the conventional) to enable the selective operation as needed by the automatic clutch to prevent the confusion of the operation operation It is to provide an apparatus and method.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, specific means for achieving the object of the present invention described above will be described in detail with reference to the accompanying drawings.

1 is an embodiment configuration diagram showing the entire automatic clutch device according to the present invention, the air compression 103 by the hydraulic action of the master cylinder 105 stored in the oil tank 106 in accordance with the operation of the clutch pedal 104 And to control the compressed air flowing into the clutch booster 100 through the air dryer 102 and the air tank 101, one end of the clutch cable 7 is connected to the clutch pedal 104. The other end is connected to the piston (2) of the ball cylinder (1). By means of the clutch cable 7 connected to the piston 2, it is preferable that a sealing means such as a shrinkable tube 9 is provided for unilateral air leakage prevention of the pneumatic cylinder 1 and airtightness of the internal air pressure. .

In addition, the power source for operating the piston (2) in the pneumatic cylinder (1) is between the air pipe (110) or between the cantilever tank 101 and the clutch booster 100 between the air tank 101 and the air dryer 102 It is configured to be supplied through an air pipe (8) branched from the connected air pipe (110 '), the air pipe (8) has a first solenoid valve (4) for controlling the compressed air passing therethrough, and a pneumatic cylinder ( Install a check valve (6) to prevent the back flow of air introduced into 1).

In addition, when the piston (2) is retracted by the compressed air which is sucked simultaneously with the opening of the first solenoid valve (4) to one side of the pneumatic cylinder (1) to suppress the noise of the exhaust air remaining in the pneumatic cylinder (1) When the piston 2 is pulled back by the restoring force of the return spring 107 and the piston 2 pulled by the clutch cable 7 is returned to the original position, suction from the outside for smooth operation of the piston 2 is performed. The air filter 3 which cleans air is installed.

In addition, the opposite side of the pneumatic cylinder (1) in which the air filter (3) is installed is coupled to the air filter (3 ') with the same function as the exhaust side, and the pneumatic cylinder (1) is returned to its original position with the piston (2) retracted The second solenoid valve 5 for controlling the discharge of the compressed air that has been sucked through the air pipe 8 when it returns is installed.

In addition, the control device 10 for controlling the first and second solenoid valves 4 and 5 receives the contact signal of the function switches TSW, CSW, ASW, and MSW as shown in FIG. A switch input unit 20 for input processing into a signal suitable for reading by 23, and a speed signal input unit 21 for transmitting the engine rotational speed and traveling vehicle speed signals of the sensors respectively installed on the engine and the transmission output shaft to the central processing unit 23. ), A memory 22 for storing setting values and programs for executing the automatic clutch, and frequently inputted information, and the memory 22 according to the input information words of the respective input units 20 and 21. A central processing unit 23 which executes a program and processes the first and second solenoid valves 4 and 5 alternately by processing corresponding to the speed value calculation plate or function switch signal of each gear stage; and the central processing unit Sole output from (23) Id valve 4, 5 is a time according to a drive signal to the engine rotational speed and driving speed control state to another pulse width consists of the duty control section 24 for controlling the exhaust or intake air quantity compression.

The operation relationship of the present invention configured as described above will be described with reference to FIGS. 3 to 5.

That is, the air compressor 103 generates compressed air at the same time as the operation of the engine by the starter shown in the drawing, which again dries moisture in the air by the air dryer 102 to supply the air tank through the air pipe 110. The compressed air stored in 101 and stored in the air tank 101 are supplied to the clutch booster 100 through the air pipe 110 '.

At this time, when the compressed air supplied to the clutch booster 100 is stepped on the clutch petal 104 as in the prior art, the compressed air flows into the cylinder chamber side not shown in the clutch booster 100 by the hydraulic upward action of the master cylinder 105. When the push rod 108 and the clutch lever 109 connected to the piston are pushed, the clutch connection is cut off and at the same time the engine power is shut off.When the clutch pedal 104 is completely released, the hydraulic force of the master cylinder 105 is dissipated and the clutch booster is lost. The inlet piston and the push rod 108 are returned to the operating state by the tension of the return spring, not shown in the drawing, to block the compressed air and to connect the engine power to the transmission (not shown).

Such operation is the driver's foot as in the conventional method, and may be shifted by operating the clutch pedal 104 from time to time as needed, and may also be operated to maintain starting when the vehicle is stopped while the gear is in the state. have.

On the other hand, if you want to automatically perform the manual operation as described above, the mode selection switch (MSW) is switched to the automatic mode. That is, when the mode selection switch MSW is switched to the automatic mode, the control apparatus 10 is connected to the vehicle through the switch input unit 20 and the speed input unit 21 in the central processing unit 23 as shown in FIGS. 4 and 5. When the input signal of the shifting switch TSW fixed to the shift lever shown in the drawing is applied to the central processing unit 23 through the switch input unit 20, the central processing unit ( 23 outputs a control signal for driving the first solenoid valve 4 of FIG. 1 through the duty controller 24 to operate the first solenoid valve 4.

At the same time, the first solenoid valve 4 is opened in a state in which the air pipe 8 is blocked, and the compressed air generated in the air compressor 103 is supplied to the pneumatic cylinder 1 through the check valve 6.

By the compressed air thereof, the piston 2 in the pneumatic cylinder 1 is retracted from the state of FIG. 2A to the state of FIG. 2B while pulling the clutch cable 7 connected to the piston 2 to engage the clutch pedal 104. ). In this operation, as described above, the hydraulic pressure of the master cylinder 105 is actuated to block the clutch connection by the suction compressed air of the clutch booster 100 and to block the engine power.

Therefore, according to this operation, for example, whenever the gear shift is arbitrarily performed as necessary, the above-described operation is repeated when the shift switch TSW fixed to the shift lever is pressed, and the gear shift can be performed at any time.

Meanwhile, when driving the first solenoid valve 4 by the shift switch TSW as described above, the central processing unit 23 of the control device 10 turns off the second solenoid valve 5 through the duty control unit 24. The compressed air suction rate prevents the release of air inside the pneumatic cylinder (1), thereby speeding up the piston action.

Subsequently, when the gear shifting switch (TSW) is turned off after shifting to the desired gear, the central processing unit 23 turns off the first solenoid valve 4 through the duty control unit 24 and at the same time the second solenoid valve 5 Turn on).

Accordingly, the compressed air of the air pipe 8 is blocked by the first solenoid valve 4 and remains at the input port side while the compressed air of the pneumatic cylinder 1 is passed through the second solenoid valve 5. The exhaust air is gradually exhausted to the outside through the air pipe 8 ', and the compressed air inside the pneumatic cylinder 1 exhausted through the second solenoid valve 5 has an exhaust time according to the engine speed and traveling speed information described later. Different.

Accordingly, while the compressed air of the pneumatic cylinder 1 is exhausted to the outside through the second solenoid valve 5, the clutch pedal 104 is driven by the return spring 107 of the clutch pedal 104 in the same state as the third b degree. The piston 2 of the pneumatic cylinder 1 is also returned to its original position by the clutch cable 7 which is returned to its original state such as 3a and connected thereto.

In this operation, as described above, the rising hydraulic pressure of the master cylinder 105 is extinguished to block compressed air flowing into the clutch booster 100, and at the same time, connect the clutch to transmit engine power.

In addition, when the compressed air of the pneumatic cylinder (1) is exhausted, it helps to smoothly move the piston (2) returned to the external air suction charged by the air filter (3) fixed to one side of the pneumatic cylinder (1) The air filter 3 'fixedly installed at the outlet side of the second solenoid valve 5 reduces noise during exhaust.

On the other hand, according to the engine rotation speed and vehicle speed reduction information, the clutch operation can be controlled organically or separately with the on / off operation of the shift switch TSW.

The organic operating condition is that in order to increase the vehicle speed at a low speed in which the start of each gear is not turned off, there is an organic operating relationship when shifting, and the individual operating condition is a state in which the gear is not released (other than a neutral state). If the vehicle is stopped or the vehicle is in a very continuous state where the starting can be turned off at each gear stage, it is operated individually according to the engine rotation speed and the vehicle speed regardless of the operation of the shift switch (TSW). This will be described in more detail with reference to FIGS. 4 and 5.

That is, in the state in which the shift switch TSW is turned off, the central processing unit 23 receives the accelerator pedal operation detection signal from the accelerator pedal switch ASW installed near the accelerator pedal through the switch input unit 20 and the speed signal input unit 21. The current vehicle speed and engine speed detection signals are read from the vehicle speed and engine speed detection sensors.

At the same time, the central processing unit 23 recognizes that the accelerator pedal does not step on the accelerator pedal when the detected signal of the accelerator pedal switch ASW is 'off', and puts the accelerator pedal on when the detected signal is 'on'. To be recognized.

Therefore, according to the operation state of the accelerator pedal switch ASW, the central processing unit 23 compares the vehicle speed and engine speed values stored in the memory 22 with the current vehicle speed and engine speed read and detects if If the vehicle speed and the engine speed value are larger than the stored vehicle speed and the engine speed value, the position of the transmission gear is determined again, and when the vehicle is not in a neutral state, the duty control unit 24 is operated as in the on operation of the shift switch TSW. The first solenoid valve 4 is 'on', and the second solenoid valve 5 is 'off', and pulls the clutch pedal 104 in the same state as the third b degree.

However, if the transmission gear is in the neutral position or the detected vehicle speed and engine speed value is greater than or equal to the stored vehicle speed and engine speed value (detected value ≥ set value), the central processing unit 23, the first solenoid valve 4 is 'off' through the duty controller 24, and the second solenoid valve 5 is 'on'. The clutch pedal 104 is released in the same state.

Such operation is performed by alternately controlling the first and second solenoid valves 4 and 5 according to vehicle speed and engine speed values which are frequently detected when the mode selection switch MSW is in the automatic mode. 104 is repeatedly cracked or released. In addition, the vehicle speed value stored in the memory 22 for comparison with the vehicle speed and engine speed value detected here may vary slightly depending on each gear stage, but is about 20 km / h, and the engine speed value is 700 ( rpm) is preferred, but the setting value may be modified as necessary.

According to the present invention as described above, a pneumatic cylinder is installed as a means for pulling the clutch pedal, and a plurality of solenoid valves are alternately controlled according to the shift switch operation signal whenever necessary and the engine speed and the vehicle speed detected frequently. By controlling and opening the compressed air by the program of the control device, the clutch pedal can be operated automatically to provide convenience in driving, and the foot operation can be reduced, thereby reducing the driver's fatigue. I can provide it.

Claims (2)

By the hydraulic action of the master cylinder 105 stored in the oil tank 106 according to the operation of the clutch pedal 104 to the clutch booster 100 through the air compressor 103, the air dryer 102 and the air tank 101. In controlling the incoming compressed air, one end of the clutch cable (7) is connected to the clutch pedal (104), the other end of which is connected to the piston (2) of the pneumatic cylinder (1) through the shrinking tube (9) In the intake side of the pneumatic cylinder (1) in which the air filter (3) is installed on the front side, the air pipe (8) for receiving the compressed air generated by the known air compressor (103) is piped therebetween, A solenoid valve 4 and a check valve 6 are provided, and an air pipe 8 'for exhausting the air inside the cylinder to the outside of the pneumatic cylinder 1, an air filter 3' for preventing noise, and a solenoid valve 5), and the plurality of solenoid valves (4) (5) Engine rotational speed of the switch input unit 20 for input processing of the contact signal of each function switch (TSW, CSW, ASW, MSW) into a signal suitable for the central processing unit 23 to read, and sensors installed on the engine and transmission output shafts, respectively. A speed signal receiver 21 for transmitting the traveling speed signal to the central processing unit 23, a memory 22 for storing information which is frequently input and has a built-in setting value and a program for executing the automatic clutch, The first and second solenoid valves 4 are executed by executing programs in the memory 22 according to the input information of each of the input units 20 and 21 and processing the corresponding gear signals according to the speed value calculation board or function switch of each gear stage. The central processing unit 23 for controlling (5) and the solenoid valve (4) (5) driving signals outputted from the central processing unit (23) at a pulse width different in time according to the engine rotation speed running speed state. Regulated times Or inhalation automatic clutch device, characterized in that the connection consists hayeoseo applied to the alternating on / off control signal of the duty control section the controller 10 is configured (24) for controlling the compressed air flow. When the selection mode switch MSW is in the automatic mode, the control device 10 monitors the contact state of the shift switch TSW installed in the shift lever, so that the exhaust air pipe 8 'is turned on whenever the shift switch TSW is turned on. A first step of interrupting the solenoid valve 5 and intermittently clutching the clutch pedal 104 by the compressed air pressure sucked by opening the solenoid valve 4 of the intake-side air pipe 8; Whenever the shift switch TSW of the first process is turned off, the current detection value (the vehicle speed and the engine speed value) is read and read from the accelerator pedal operation detection and the current vehicle speed and the engine speed detected by the vehicle speed and the engine speed sensor from time to time. ) And a second step of comparing and discriminating the set values (vehicle speed and engine speed value) stored and stored in the memory 22; When the result compared in the second process is the detected value <set value>, the neutral position of the gear is again determined, and if it is not the neutral position, the clutch pedal 104 is operated as if the shift switch TSW of the first process is on. A third process of cracking down; The solenoid valve 4 of the intake-side air pipe 8 when the gear position of the third process is in a neutral state in the state where the detected value ≥ set value or the detected value 〈set value ′ is compared as the result of the second process. And a fourth process of releasing the clutch pedal 104 while the air pressure inside the pneumatic cylinder 1 is exhausted by opening the solenoid valve 5 of the exhaust side air pipe 8 'at the same time. Auto clutch method of the car.