JP3254547B2 - Control method of clutch control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a clutch control device suitable for use in a semi-automatic transmission system .
It relates to a control method .

[0002]

2. Description of the Related Art In a motor vehicle, especially a large route bus, starting and stopping are frequently performed, and a shift operation is repeated a considerable number of times during driving. This shift operation is performed by a change lever in the driver's seat, and a long rod is used to connect a distance of about 10 m from the change lever to the transmission at the rear of the vehicle body, and the shift speed of the transmission is switched via the rod. For this reason, both the operation force and the stroke of the change lever are large, which causes driver fatigue.

[0003] In recent years, instead of connecting the change lever and the transmission with a rod, the change lever unit and the control unit are connected by electric wiring, and the change lever is connected to the control unit according to the operation of the change lever by the change lever unit. A finger control that transmits a position signal, generates a shift control signal (shift control signal) in a control unit, and sends the generated shift control signal to a gear shift unit to switch a transmission gear stage. -A transmission system (hereinafter referred to as FCT) is employed.

In this FCT, a shift control signal is generated based on a change lever position signal from a change lever unit, and the generated shift control signal is sent from a control unit to a gear shift unit. The shift control signal selectively drives solenoid valves attached to the select cylinder and the shift cylinder in the gear shift unit, switches the supply state of compressed air from the air tank, and switches the piston position in the cylinder. Then, the shift fork of the selection operation section moves, and the gear position of the transmission is switched. If this FCT is used, the speed change operation is replaced with the electric pneumatic control mechanism from the mechanical remote control mechanism, and the operating force and the shift stroke can be greatly reduced, and the driving fatigue can be reduced.

[0005] In this FCT, the shift speed of the transmission is switched by depressing a clutch pedal as in a normal manual shift system. That is, when switching the transmission gear, the clutch pedal is depressed, the clutch is disengaged, and the change lever is operated. On the other hand, Japanese Patent Laid-Open No. 6-24131
In the "semi-automatic transmission device" disclosed in Japanese Unexamined Patent Application Publication No. 4 (1993) -2004, the operation of the clutch pedal and the change lever during high-speed traveling is eliminated by using the FCT as a semi-automatic transmission system.

[0006] That is, when the vehicle is traveling at low speeds where delicate control is required for the clutch meet, the gear position is switched by manual operation. The stage is switched. in this case,
Automatic shifting of the gear stage during high-speed traveling is performed by determining the traveling stage according to the driving state, giving a control command for the decided traveling stage to the clutch actuator and the gear shift unit attached to the clutch, and disengaging the clutch. This is performed by controlling the contact operation and the gear shift operation of the gear shift unit.

[0007]

In this semi-automatic transmission system, the clutch pedal is always operated when starting and stopping. Therefore, when the vehicle is stopped, the engine is running, the gears are engaged, and the clutch pedal is disconnected, and if the foot is carelessly released from the clutch pedal, the vehicle may jump out. There was. In the case of FCT, since the operation is the same as that of the manual transmission system, there is a low possibility that the vehicle will jump out by accidentally releasing the foot from the clutch pedal. However, in the case of a semi-automatic transmission system, when the vehicle is stopped, the operation is similar to an automatic car, even though the engine is running with gears engaged, so the driver accidentally releases his / her foot from the clutch pedal accidentally. The vehicle may jump out.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a clutch control device which does not cause the vehicle to jump out even if the foot is inadvertently released from the clutch pedal. Is to provide a control method .

[0009]

SUMMARY OF THE INVENTION In order to achieve such an object, the present invention provides a method for operating a clutch by operating a clutch pedal.
Manual clutch operating means for connecting and disconnecting
Automatically engages and disengages clutches in response to signals from the
Control method of clutch control device having clutch operating means
The vehicle is stationary, the engine is running, and the transmission is in gear.
The clutch is disconnected by the manual clutch operating means.
When the clutch is engaged by the clutch pedal
Stroke change amount (Δt) per unit time (Δt)
St) and changes in stroke per unit time
If the amount (ΔSt / Δt) is equal to or greater than the predetermined value, the automatic
Activate the latch operation means to forcibly disengage the clutch
It is to return to. According to the present invention, the vehicle can be started (when the vehicle is stopped and the engine is
The transmission is in gear,
If the clutch is disconnected by the manual clutch operating means
In came), the clutch by operating the clutch pedal is abruptly changed to the contact direction, operation of the automatic clutch operation means
Clutch is forcibly returned to the cross-sectional direction by.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. FIG. 2 is a system configuration diagram showing one embodiment of a semi-automatic transmission system to which the present invention is applied. In the figure, 1 is an engine, 1A is an electronic governor, 2 is a clutch, 2A is a clutch actuator (CLAC) attached to the clutch 2, 2B is a clutch stroke sensor, 2C is a 3-way valve, 2D is a double check valve, 2E. Is a relay valve, 3 is a transmission, 4 is a gear shift unit (GSU),
5 is a change lever unit (CLU), 6 is a semi-automatic transmission control unit (semi-automatic T /
M ECU), 7 is an electronic governor control unit (electronic governor ECU), 8 is a clutch pedal, 8A is a master cylinder attached to the clutch pedal 8, 8B is a clutch pedal switch for detecting a disconnected state of the clutch pedal, and 9 is a brake. Pedal, 10 is an accelerator pedal, 11
Is an alarm buzzer, 12 is a gear position indicator, and 13 is an air tank.

The change lever unit 5 changes the shift pattern of the change lever 5A as shown in FIG.
(Neutral), R (reverse), and S (running)
, UP (shift up), and DOWN (shift down). this house,
In the case of entering the N position, R position and S position, the change lever 5
When the hand is released from A, the change lever 5A stops at this position. On the other hand, in the UP position and the DOWN position, when the hand is released from the change lever 5A, S is released.
Automatically return to position.

The electronic governor ECU 7 includes an accelerator pedal 1
A semi-automatic T / ME is input with an accelerator depression amount signal, an engine speed signal, and a vehicle speed signal corresponding to the depression amount of 0.
Electronic governor 1 while performing serial communication with CU6
Control A.

The semi-automatic T / M ECU 6 is provided with a change lever position signal from the change lever unit 5, a brake-on signal corresponding to depression of the brake pedal 9, a gear position signal from the gear shift unit 4, and a clutch from the clutch stroke sensor 2B. With the stroke signal as input,
While performing serial communication with the electronic governor ECU 7,
When the vehicle is traveling at a low speed, the gear position is switched by manual operation (manual switching), and when traveling at a high speed, the gear is automatically switched.

That is, the semi-automatic T / M ECU 6
During low-speed traveling, a T / M gear control signal (shift control signal) is generated based on the change lever position signal from the change lever unit 5 in consideration of the engine speed and the vehicle speed. A signal is sent to the gear shift unit 4. The gear shift unit 4 has a semi-automatic T /
In response to the T / M gear control signal from the M ECU 6, the supply state of the compressed air from the air tank 13 is switched, and the transmission gear of the transmission 3 is switched. At the time of manual switching of the shift speed, the clutch pedal 8 is depressed, the clutch 2 is disengaged, and the change lever 5A is operated, as in a normal manual shift system.

That is, when the clutch pedal 8 is depressed, oil pressure is applied to the relay valve 2E through the hydraulic line L via the master cylinder 8A. Upon receiving this hydraulic pressure, the relay valve 2E supplies the compressed air from the air tank 13 to the clutch actuator 2A via the double check valve 2D, and the clutch actuator 2A disconnects the clutch 2. The disengaged state of the clutch 2 is recognized by the semi-automatic T / M ECU 6 based on the clutch stroke signal from the clutch stroke sensor 2B. The semi-automatic T / M ECU 6 generates a T / M gear control signal to the gear shift unit 4 based on the change lever position signal from the change lever unit 5 after confirming the disengagement state of the clutch 2.

The semi-automatic T / M ECU 6 determines a traveling stage according to the driving state during traveling at a high speed stage, and transmits a control command to the decided traveling stage to the clutch actuator 2A.
To the gear shift unit 4 to control the connection / disconnection operation of the clutch 2 and the gear shift operation of the gear shift unit 4. That is, when traveling at high speed, the semi-automatic T / M ECU 6 grasps the driving state from the vehicle speed, the accelerator depression amount, and the like, and determines the traveling step according to the grasped driving state. Then, the control command (clutch connection / disconnection control signal and T / M gear control signal) to the determined traveling stage is given to the three-way valve 2C and the gear shift unit 4, and the clutch speed and the engine speed are monitored while the clutch speed is monitored. 2 is controlled and the gear shift operation of the gear shift unit 4 is controlled to automatically switch to a required traveling stage.

In this semi-automatic transmission system, the change lever 5A is in the S position during traveling, and the current gear position cannot be recognized from the position of the change lever 5A. Therefore, in this embodiment,
The gear position indicator 12 is used to display the current gear position. That is, the semi-automatic T / M ECU 6
Always recognizes the current gear position based on the gear position signal from the gear shift unit 4. This semi-automatic T
/ M The current gear position recognized by the ECU 6 is displayed on the gear position indicator 12.

Next, a processing operation unique to the present embodiment performed by the semi-automatic T / M ECU 6 will be described with reference to a flowchart shown in FIG. Semi-automatic T / M EC
U6 checks in step 101 whether the vehicle speed is 0 km / h, that is, whether the vehicle is in a stopped state. If the vehicle speed is 0 km / h in step 101, the process proceeds to step 102.

In step 102, it is checked whether the engine 1 is rotating. If it is determined in step 102 that the engine 1 is rotating, the process proceeds to step 103. In step 103, it is checked whether the gear is engaged. If it is determined in step 103 that the gear is engaged, the process proceeds to step 104. In step 104, it is checked whether or not the clutch pedal 8 has been released.
If it is determined in step 104 that the clutch pedal 8 has been released, the process proceeds to step 105.

That is, the semi-automatic T / M ECU 6
In steps 101 to 104, a state where the vehicle is stopped, the engine 1 is rotating, the gears are engaged, and the clutch pedal 8 is disconnected is detected as a startable state. Then, if this startable state is detected, the routine proceeds to step 105.

In step 105, the clutch stroke change amount (.DELTA.St / .DELTA.t) in the contact direction of the clutch 2 is checked, that is, the unit time .DELTA.t
The change amount ΔSt per hit is checked. If the checked change amount ΔSt / Δt is equal to or larger than a predetermined value, that is, if the change of the clutch 2 in the contact direction is abrupt, the process proceeds to step 106.

In step 106, semi-automatic T / M
The ECU 6 sends a clutch disconnection control signal to the three-way valve 2C and makes the alarm buzzer 11 sound. The three-way valve 2C receives the clutch disconnection control signal from the semi-automatic T / M ECU 6 and switches the supply state of the compressed air from the air tank 13 to the clutch actuator 2A via the actuator valve 2D. Disconnect 2A. Thus, the clutch 2 is forced back into the cross-sectional direction.

Then, the semi-automatic T / M ECU 6 confirms that the driver recognizing the erroneous operation by the sound of the alarm buzzer 11 again releases the clutch pedal 8 (step 107), and moves to the three-way valve 2C. Of the clutch disengagement control signal is interrupted, that is, a clutch engagement control signal is sent to stop the disengagement operation of the clutch actuator 2A and interrupt the sounding of the alarm buzzer 11. This returns to the initial state.

That is, in this embodiment, when the change amount .DELTA.St per unit time .DELTA.t in the contact direction of the clutch 2 in the startable state exceeds a predetermined value, that is, when the clutch 2 changes abruptly in the contact direction, the clutch 2 2 is forcibly returned to the cross-sectional direction. As a result, even if the foot is inadvertently released from the clutch pedal 8, the vehicle does not jump out.

[0025]

As is apparent from the above description, according to the present invention, the clutch pedal can be started in the startable state.
When the clutch is abruptly changed to the contact direction by the operation, the automatic
The clutch is forcibly disconnected by the operation of the clutch operating means.
Since the return direction, even inadvertently release the foot from the clutch pedal, there is no possibility that the vehicle will jump out.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a processing operation unique to the present embodiment performed by a semi-automatic T / M ECU.

FIG. 2 is a system configuration diagram showing one embodiment of a semi-automatic transmission system to which the present invention is applied.

FIG. 3 is a diagram showing a shift pattern of a change lever.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Engine, 1A ... Electronic governor, 2 ... Clutch, 2A
... clutch actuator (CLAC), 2B ... clutch stroke sensor, 2C ... 3-way valve, 2D ... double check valve, 2E ... relay valve, 3 ... transmission, 4 ... gear shift unit (GSU), 5
… Change lever unit (CLU), 6… Semi-automatic transmission control unit (Semi-automatic T / M
ECU), 7: electronic governor control unit (electronic governor ECU), 8: clutch pedal, 8A: master cylinder, 8B: clutch pedal switch, 9: brake pedal, 10: accelerator pedal, 11: alarm buzzer,
12: gear position indicator, 13: air tank.

Claims (3)

(57) [Claims] The clutch is operated by operating a clutch pedal.
From the manual clutch operating means for connecting and disconnecting, and from the electronic control unit
An automatic clutch that operates in response to a signal to disconnect and connect the clutch
Control method for clutch control device having latch operating means
In the vehicle is in a stopped state, the engine is rotated, tigers
Transmission is engaged in the gear position, and the manual
When the clutch is disengaged by the latch operation means
The direction in which the clutch is engaged by the clutch pedal.
Change amount (ΔS) per unit time (Δt)
t), and the stroke change amount per unit time (ΔSt / Δ
If t) is equal to or greater than a predetermined value, the automatic clutch operating means is operated to release the clutch.
A method for controlling a clutch control device , wherein the clutch control device is forcibly returned to a disconnection direction . 2. A clutch control device according to claim 1.
In the control method, the stroke change amount per unit time (ΔSt / Δ
If t) is equal to or greater than a predetermined value, the automatic clutch operating means is operated to release the clutch.
JP that it has to issue a warning with back to the cross-sectional direction
A control method of a clutch control device according to the present invention. 3. A clutch system according to claim 1, wherein :
In the control method of the control device, the automatic clutch operating means is operated to activate the clutch.
With the clutch pedal returned to the disengagement direction, the clutch pedal
If it is detected that the automatic clutch operating means has stopped,
This was returned to the clutch control by the latch operating means
A control method for a clutch control device, characterized by: