KR0149362B1 - Control system of clutch for a car - Google Patents

Abstract

It is an object of the present invention to automatically clamp the clutch when a certain speed is reached when the brake is pressed while driving in a vehicle equipped with a reverse control device, and to allow the clutch to be automatically connected only by the operation of the accelerator pedal at the start. The present invention provides an improved clutch control system for an automobile.

In order to achieve this, the present invention provides a vacuum booster by means of a brake switch which is turned on as a user presses the brake pedal during braking, and an electronic control unit that senses an electrical signal of a vehicle speed sensor that detects a drop in vehicle speed. Braking is maintained as the actuator is operated, and at the start, the vacuum unit is activated by the acceleration switch which is turned on by pressing the accelerator pedal and the electronic controller which senses the electric signal of the vehicle speed sensor that senses the vehicle speed. In the reverse control apparatus of a vehicle in which the brake pedal is started by releasing the braking of the brake pedal when the woster and the actuator are operated, the electronic controller which senses the on or off state of the brake switch or the acceleration switch is provided. By turning the 1,2 relay on or off, braking and starting can be performed by applying electrical signals to the first and second directional valves. The hydraulic path is changed so that the release cylinder can be intermittent or connected to the transmission, and both the first and second relays and the first and second directional valves are turned off during normal driving or slow running. And a clutch control system of an automobile comprising a hydraulic circuit which is operated by a normal clutch.

Description

Clutch control system of car

1 is a clutch control system according to the present invention,

2 is a control unit of the directional valve according to the present invention,

3 is a hydraulic control unit of the control system according to the present invention,

4 is a view showing the clutch intermittent operation of the hydraulic control unit according to the present invention,

5 is a view showing a clutch connection operation diagram of the hydraulic control unit according to the present invention.

6 is a view showing the operation of the normal or slow running of the hydraulic control unit according to the present invention.

7 is a block diagram of a reverse control apparatus for explaining an automobile applied to the prior art.

* Explanation of symbols for main parts of the drawings

4 brake switch 8 electronic control device

18: acceleration switch 22: release cylinder

28,30: 1st, 2nd relay 34: Master cylinder

36,24: 1st, 2nd direction switching valve 38: orifice

40: reservoir 48: accumulator

[Industrial use]

The present invention relates to a clutch control system, and more particularly, when a vehicle equipped with a reverse control device presses a brake while driving, when the vehicle speed drops below a certain speed, the clutch is automatically controlled and the accelerator pedal is operated at the start. A clutch control system of a motor vehicle for allowing a clutch to be automatically connected.

[Prior art]

The transmission of the vehicle is a device that transmits the power of the engine to the driving wheel by changing the rotational force and speed to match the driving state of the vehicle.

Such transmissions include an automatic transmission that automatically converts rotational force and speed according to driving conditions by hydraulic pressure, and a manual transmission that converts rotational force and speed by manual operation of a driver. An automobile equipped with an electronic automatic transmission In the case of the uphill slope, the reverse phenomenon does not occur when the vehicle is equipped with the latter manual transmission.

In the above manual transmission-equipped vehicle, the engine is stopped if the brake pedal is pressed until the brake stops when the brake pedal is braked, so the clutch should be clamped by stepping on the clutch pedal at the end of the brake.

In the case of a vehicle equipped with a reverse prevention device, the clutch should be clamped at the end of braking and the gear of the transmission should be waited in a neutral state while the vehicle is stopped. In this case, the vehicle equipped with the reverse control device is automatically braked.

When starting the vehicle with the reverse control apparatus described above, the clutch is depressed and the gear is placed in the first stage, and the clutch is gradually released while the clutch is released.

In other words, the manual transmission does not have a separate device that can hold the back of the vehicle from the moment the brake pedal is released when the vehicle is about to start after stopping, until the engine power is transmitted to the input shaft of the transmission. Occurrence of reverse is very natural.

In order to minimize the reverse phenomenon on the uphill slope, the brake pedal and the accelerator pedal should be operated skillfully. However, the operation of the brake pedal and the acceleration pedal is very difficult. Climbing the ramp of the power driver The fuel consumption is increased by excessive accelerator pedal operation at the start.

In addition, when the vehicle is pushed back to the forward state to give a lot of power to the power transmission system, especially the clutch plate and the clutch cover assembly is overloaded with a lot of problems such as increasing their failure rate.

FIG. 7 is a block diagram for explaining a reverse control device which is generally used. The brake pedal 2 is braked to brake a driving car, and the brake switch is turned on when the brake pedal 2 is pressed. 4) and the electronic controller 8 which receives electric signals from the vehicle speed sensor 6 which detects the vehicle speed, and the actuator 10 operated by the electronic controller 8 in accordance with these electrical signals. The actuator 10 is connected to the electric booster 14 and the hollow plate 12 so that the brake pedal 2 can be pulled by the wire 20.

In addition, the electronic controller 8 is electrically connected to the accelerator switch 18 interlocked with the accelerator pedal 16 to release the braking state when the start signal is received.

In such a device, when the vehicle speed reaches zero state by stepping on the brake pedal 2, the actuator 10 is operated to pull the brake pedal 2, so that the brake state is maintained even when the driver releases the foot from the brake pedal 2.

[Problem trying to solve the invention]

In the prior art as described above, when the brake pedal is pressed from the brake to the stop, the engine is stopped. Therefore, the clutch pedal must be clamped before stopping and the gear of the transmission should be in a neutral state while the vehicle is stopped.

And as the brake pedal is automatically kept in a stepped state, the start of the vehicle has a problem in that it is not possible to move both feet freely as the step is started by stepping on the accelerator pedal while gradually stepping on the clutch and then releasing the clutch pedal.

[Means to solve the problem]

It is an object of the present invention to automatically clamp the clutch when a certain speed is reached when the brake is pressed while driving in the reverse control device, and at the start, the clutch is automatically connected by only operating the accelerator pedal to improve the performance and driving performance of the vehicle. To provide a clutch control system of a vehicle that can.

In order to realize this, the present invention provides a vacuum booster by a brake switch which is turned on as a user presses the brake pedal during braking and an electronic controller which senses an electrical signal of a vehicle speed sensor that detects a drop in vehicle speed. Braking is maintained by operating the actuator and the actuator, and at the start, the acceleration switch is turned on when the accelerator pedal is pressed, and the electronic controller detects the electric signal of the speed sensor detecting the vehicle speed. In the reverse control apparatus of a vehicle in which the braking of the brake pedal is released when the master and the actuator are operated, the electronic control apparatus which senses the on or off state of the brake switch or the acceleration switch is provided. By turning the first and second relays on or off, braking and starting by applying electrical signals to the first and second turn valves. The hydraulic path is changed so that the release cylinder can be intermittent or connected to the transmission, and both the first and second relays and the first and second directional valves are turned off during normal driving or slow running. And a clutch control system of an automobile comprising a hydraulic circuit which is operated by a normal clutch.

The first and second relays are turned on or off by the electronic control device, thereby providing first and second directional switching valves in which the hydraulic path is changed so that braking and driving are performed.

In order to provide an accumulator in which the flow rate pressurized into the release cylinder is stored and a pressure sensor capable of sensing pressure can be applied as an electrical signal to the hydraulic pump.

[Action]

The braking of the present invention is a vehicle speed sensor for detecting a vehicle speed that decreases as the brake pedal is pressed, and the electronic control device that detects the on (on) by the brake switch is a vacuum booster and the actuator connected to the hollow tube is vacuum Is formed to pull the brake pedal so that braking is applied and the second relay is activated and turned on.

Accordingly, when the second relay is turned on, the second direction switching valve is operated to connect the hydraulic lines to the port e and the port f so that the hydraulic pressure of the accumulator is filled in the release cylinder.

When hydraulic pressure is applied to the release cylinder, the release cylinder pushes the release lever, and the clutch is interrupted in the transmission, so that the braking is maintained and the vehicle is stopped.

In order to start again from the stopped state, when the accelerator pedal is pressed, another first relay is activated by an electronic controller that senses that the accelerator switch is on. As the hydraulic line is connected to port c and port b, the hydraulic pressure in the release cylinder is released by the spring force of the release lever. At this time, the discharged flow is gradually released by the orifice, and the clutch is connected to the transmission. As it gradually becomes an on clutch, the speed is increased to drive.

When the clutch is connected to the transmission and the electronic control device that detects a speed above or below a predetermined speed by the vehicle speed sensor turns off both the first and second relays, both the first and second directional control valves are turned off. off) and only the conduit L2 is connected to the release cylinder, thereby making manual operation by the clutch pedal.

EXAMPLE

Hereinafter, a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic diagram of a clutch control system for a vehicle according to the present invention, FIG. 2 is a view showing a control unit of a directional valve according to the present invention, and FIG. 3 is a hydraulic control unit of a clutch control system according to the present invention. As the drawings, the same reference numerals are given to portions having the same functions as those in FIG.

In this embodiment, the operating state of the brake pedal 2 and the accelerator pedal 16 is a normal state that can be input as an electrical signal to the electronic controller 8 by the brake switch 4 and the accelerator switch 18. The electrical connection is made.

The electronic controller 8 transmits electrical signals from the vehicle speed sensor 6, the actuator 10, the acceleration switch 18, and the brake switches 4, as shown in FIG. The electronic control device 8 forms an electrical connection capable of turning on / off the first relay 28 and the second relay 30.

The first relay 28 and the second relay 30 are connected to the first direction switching valve 36 and the second direction switching valve 24 in an ON / OFF operation, respectively. The switching of the port can be realized by applying or interrupting the power supply of the battery 31 to these direction switching valves.

3 is a view showing an example in which the first and second directional control valves 36 and 24 shown in FIG. 2 are applied to the clutch control system, and the first and second directional control valves 36 and 24 are A three-port two-position valve constitutes an accumulator 48, a clutch mass cylinder 34, and a hydraulic line, respectively.

That is, the port a of the first directional valve 36 is configured to receive hydraulic pressure from the accumulator 48 through the conduit L1, and the port d of the second directional valve 24 is a clutch. The hydraulic cylinder can be supplied from the mass cylinder 34 through the pipe line L2.

The port b of the first diverter valve 36 is in communication with the port e of the second diverter valve 24 so that hydraulic pressure can be flowed. The port c of the first diverter valve 36 is a pipe line. It communicates with the pipeline L2 through L3.

The port f of the first directional valve 24 is connected to supply hydraulic pressure to the clutch release cylinder 22 or to discharge hydraulic pressure from the cylinder.

The conduit L1 is connected to the cylinder cylinder reservoir 40. A check valve 46 for preventing a back flow of the fluid is provided on the conduit L1, and the hydraulic pressure in the accumulator 48 is increased. Hydraulic pump 44 for replenishment is installed.

The pressure sensor 50 is installed to detect the hydraulic pressure drop in the accumulator 48. The sensor 50 is electrically connected to the hydraulic pump 44 so that the hydraulic pressure drops below a certain pressure. It is designed to drive the pump.

The operation of the present invention made as described above operates when starting or stopping after braking and braking as shown in FIGS.

The braking of the present invention is a vehicle speed sensor 6 for detecting a speed at which the vehicle speed gradually decreases as the user presses the brake pedal 2, and an electronic control device for detecting that the brake switch 2 is turned on. 8) turns on the battery 31 by applying power to the second relay 30.

Accordingly, when the second relay 30 is turned on, the second direction switching valve 24 operates to connect the hydraulic lines on the port e and the port f, thereby emptying the hydraulic pressure of the accumulator 48 to the space. Filled in the release cylinder 22.

The connection between the port e and the port f of the second direction switching valve 24 is made of braking and is not connected during normal driving or slow running.

When the hydraulic pressure is applied to the release cylinder 22, the release cylinder 22 pushes the release lever, and the release lever drops the clutch 20 from the transmission 18 to interrupt the electronic control in a completely stopped state. The device 8 builds a vacuum in the actuator 10 connected by the vacuum booster 14 and the hollow tube 12 so that the wire 20 is braked because the brake pedal 2 is pulled out so that braking is maintained. The car stops.

In order to start again from the stopped state, the accelerator pedal 16 is depressed. At this time, the vehicle speed sensor 6 which detects that the vehicle speed is 0 and the electronic controller 8 which simultaneously senses that the acceleration switch 18 is turned on are on. When the first relay 28 is turned on, the first direction switching valve 36 operates to connect the hydraulic line to the port c and the port b. The hydraulic pressure inside is released by the elastic force of the release lever.

As described above, as the flow rate exiting the release cylinder 22 is slowed by the orifice 38, the clutch 20 is gradually connected to the transmission 18. This starts the connection in a half-clutch state and becomes an on clutch when the speed reaches a predetermined speed or more and shifts.

When the clutch 20 is connected to the transmission 18 and travels, the electronic control apparatus 8 that recognizes an electric signal of the vehicle speed sensor 6 that detects a speed above or below a predetermined speed is first, By turning off both relays 28 and 30, the first and second directional valves 36 and 24 are also turned off so that only the conduit L2 is connected to the release cylinder 22. do.

As described above, only the conduit L2 is connected to the release cylinder 22 to allow the gear stage shifting by the clutch pedal 54 to be a manual operation.

[Effects of the Invention]

In the present invention, the driver can freely hold both feet without stepping on the clutch and brake when waiting for the signal and stops. It is a very convenient invention. And the rapid brake is a useful invention that does not turn off the engine because it is automatically controlled even if you do not step on the clutch.

Claims (4)

(a) The first and second relays are turned on or off by an electrical signal of an electronic controller which senses the on or off state of the brake switch or the accelerator switch for braking or starting. The first and second directional control valves in which the hydraulic path is changed to the braking and starting state as a result of the step; (b) an accumulator for supplying hydraulic pressure to the first direction switching valve; (c) a release cylinder for controlling the clutch as the hydraulic pressure is charged or released as the hydraulic pressure path is changed to the braking and starting state by the directional valve; (d) a second conduit for connecting the second directional valve and the mass cylinder to arbitrarily adjust the clutch intermittent action; (e) a third conduit for connecting the first directional valve with the second conduit to return hydraulic pressure in the release cylinder to the mass cylinder so that the clutch can transmit power in the stopped state so that the vehicle can start slowly; (f) a clutch control system for a vehicle, comprising a first conduit for supplementing hydraulic pressure in a reservoir with an accumulator. 2. The clutch control system of claim 1, wherein the accumulator causes the fluid to be recharged from the hydraulic pump in which the fluid is supplied and stored in the gerber by a signal of the pressure sensor. The clutch control system of claim 1, wherein the first pipe line is configured to prevent backflow of the fluid by the check valve and to supply the fluid. The clutch control system of claim 1, wherein the second conduit comprises a check valve branched from the first conduit to prevent the inflow of fluid, and an orifice for gradually discharging the fluid.