JPH0444898Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clutch control device for an automatic transmission for a vehicle, which is suitable for controlling the operation of a clutch for an automatic transmission for a vehicle.

[Conventional technology]

As an automatic transmission device for vehicles, developed in 1987-147945
Various devices have been proposed, as described in the above publications. In these devices, when controlling the operation of the clutch, the clutch is engaged and disengaged by operating a clutch actuator using air pressure. This clutch actuator is inserted into an air circuit together with a control valve, and the operation of the clutch actuator is controlled by the operation of the disconnection control valve and the connection control valve.

[The problem that the idea aims to solve]

However, the conventional device has a problem of poor responsiveness when shifting from a half-clutch to an engaged clutch.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide a clutch control device for an automatic transmission for a vehicle that can improve responsiveness when shifting from a half-clutch to a clutch engagement operation. Our goal is to provide the following.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a clutch actuator that connects and disconnects a clutch using fluid pressure, and a clutch actuator that is inserted into a fluid flow path for driving the clutch actuator and that connects and disconnects the clutch actuator according to an operation command. A pair of contact action control valves that form a fluid flow path for operation, a group of orifices that regulate the flow rate of fluid flowing through each contact action control valve to different flow rates, and The detecting means monitors the operating states of the clutch and the accelerator pedal, and operates the half-clutch actuating means only when the accelerator pedal opening is below a predetermined value and the accelerator pedal operation direction is negative, and the half-clutch actuating means is operated when the accelerator pedal opening is above the predetermined value. and a control means for operating a clutch engagement actuation means when the clutch is fully engaged, the half clutch actuation means actuating a control valve for engagement of a flow path with a small flow rate in accordance with the amount of opening of the accelerator pedal, and the clutch engagement actuation means The present invention is characterized in that in addition to the control valve for contact action in the flow path with a small flow rate, the other control valve for contact action is also operated to operate the clutch actuator.

[Effect]

If the half-clutch actuation means is operated only when the accelerator pedal opening is less than a predetermined value and the clutch pedal operation direction is negative (pedal return), smooth operation can be achieved by operating only the contact operation control valve in the flow path with low flow rate. The clutch can be moved to contact action.

Furthermore, if the clutch engagement actuation means is operated when the accelerator pedal opening reaches a predetermined value, in addition to the engagement control valve in the flow path with a small flow rate, the other engagement control valve is also operated to close the clutch. The actuator performs contact action at high speed, improving responsiveness.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

1 and 3 show the structure of an automatic transmission equipped with a device according to the present invention.

In the figure, a transmission 38 is connected to an engine 30 via a fluid coupling 34 and a mechanical clutch 36, and the output shaft of the transmission 38 is connected to a rear axle via a propeller shaft 40. .
Further, the engine 30 is provided with a fuel injection pump 42, and the injection pump 42 is provided with an accelerator actuator 44 and an accelerator fully closed sensor 46. Note that the accelerator actuator 44 is connected to an accelerator pedal 48. Further, the mechanical clutch 36 includes a clutch actuator 5.
0, a clutch stroke sensor 52 is provided.

The transmission 38 also includes a gear set actuator 54 and a shift position detection sensor 5.
6. A gear brake mechanism 58 is provided.
Further, the shift tower 60 is provided with a shift range detection sensor 64 that detects a shift range according to the operation of the shift lever 62, and a lever return actuator 66.

Further, the engine 30 is provided with an engine rotation speed sensor 68 that detects the rotation speed of the engine 30, and the transmission 38 is provided with a gear rotation speed sensor 70 and a vehicle speed sensor 72 that detect the rotation speed of the gears. It is being The detection outputs of the various sensors are supplied to a control unit 74, and each actuator is configured to be supplied with a control signal from the control unit 74.

The control unit 74 includes a CPU, ROM,
It is composed of a microcomputer with RAM, etc., and controls the operation of the gear set actuator 54 and gear brake mechanism 58 based on the output signal of the shift position sensor 56, and controls the operation of the gear set actuator 54 and gear brake mechanism 58 based on the output signal of the clutch stroke sensor 52. It is configured to control the operation of the actuator 50 and operate the actuator 44 in conjunction with the accelerator pedal 48. It is configured to determine whether the engine rotation speed has reached a synchronized state based on the detection outputs of the gear rotation speed sensor 70 and the vehicle speed sensor 72. Furthermore, a shift position detection sensor 56, an accelerator fully closed sensor 46, and a shift range detection sensor 6
4. Controls the operation of the gear set actuator 54 and gear brake mechanism 58 based on the outputs of the engine rotation speed sensor 68, gear rotation speed sensor 70, vehicle speed sensor 72, and various buttons 90, as well as an error lamp 92, a buzzer 94, It is configured to control the operations of various relays 96.

The clutch actuator 50 is controlled by an air circuit as shown in FIG. 1, and includes magnetic valves 100 and 102 as control valves for contact operation and magnetic valves 102 as control valves for disconnection operation. Valve 104 is air compressor 1
06, air dryer 108, auxiliary tank 110,
Dedicated tank 112, double check valve 11
4. It is inserted into an air circuit having an orifice 116, an orifice 118, an orifice 120 with a smaller diameter than the orifice 118, etc. Air is supplied to the cylinder chamber 122 of the clutch actuator 50 via a double check valve 114, a magnetic valve 104, and an orifice 116. Also, the cylinder chamber 124
Orifice 120, magnetic valve 102
It communicates with the cylinder chamber 122 via the magnetic valve 100 and the orifice 118, and also communicates with the atmosphere. And magnetic valve 100,
When magnetic valve 104 is turned on while both valves 102 and 102 are in the off state, cylinder chamber 122
Air is supplied to the piston 126, and the piston 126 moves in the distal direction, causing the clutch to disengage. On the other hand, when the magnetic valve 104 is turned off and both the magnetic valves 100 and 102 are turned on, the air in the cylinder chamber 122 is discharged into the atmosphere through the magnetic valves 102 and 100, respectively.
The piston 126 moves in the tangential direction, causing the clutch to engage.

In addition, the air in the auxiliary tank 110 or the dedicated tank 112 is controlled by magnetic valves 128, 130,
132, 134, 136, 138 to actuator 38a of transmission 38. And magnetic valves 128, 13
A gear shift operation is performed by turning on the magnetic valves 128 and 132.
A gear selection operation is performed by turning on the signals 4, 136, and 138.

The present embodiment has the above-mentioned configuration, and its operation will next be explained based on the flowchart of FIG. 2.

First, the clutch is disengaged (step A), and the gear is set (step B). Then, the opening degree of the accelerator pedal 48 is set to a predetermined value, for example.
Determine whether it is below 20% and press the accelerator pedal 4.
8 is detected (Step F). And the pedal acceleration is negative (pedal return)
A determination is made as to whether this is the case (step G). When the opening degree of the accelerator pedal 48 is 20% or less and the depression acceleration is negative (pedal return), the clutch stroke amount S is determined based on the negative acceleration of the accelerator, that is, the time t of the return. Thereafter, the accelerator pedal 48 is depressed by actuating the accelerator actuator 44 (step K). Accelerator pedal opening is a predetermined value, for example 20%
When the magnetic valve 10
An operation command is given in which both signals 0 and 102 are turned on (step L). That is, when the clutch shifts from half-clutch to clutch engagement control, a command is given to both magnetic valves 100 and 102 to turn on, and the actuation of each valve 100 and 102 causes the clutch actuator 50 to engage at high speed. Operate. Move to step N, magnetic valve 1
Only 02 is turned on to shift to slip rate control.

[Effect of idea]

As explained above, according to the present invention, the half-clutch actuating means operates the contact operation control valve of the flow path with a low flow rate in accordance with the amount of opening of the accelerator pedal, and the clutch engagement actuation means operates the control valve for contact operation of the flow path with a low flow rate. In addition to the actuating control valve, the other contact actuating control valve is also actuated to operate the clutch actuator, which improves responsiveness when the clutch transitions from the half-clutch state to the engaged actuating state. You can get excellent results.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing one embodiment of the present invention;
This figure is a flowchart for explaining the operation of the device shown in FIG. 1, and FIG. 3 is an overall configuration diagram of an automatic transmission equipped with the device according to the present invention. 50...Clutch actuator, 74...Control unit, 100, 102, 104...
...Magnetic valve, 116, 118, 120
...Orifice chair.

Claims (1)

[Scope of utility model registration request] A clutch actuator that connects and disconnects the clutch using fluid pressure, and a disconnecting actuator that is inserted into a fluid flow path for driving the clutch actuator and forms a fluid flow path for disconnecting and disconnecting the clutch actuator in response to an operation command. a pair of contact action control valves that are inserted into the fluid flow path for driving the clutch actuator and form a fluid flow path for the clutch actuator contact action in response to an operation command; A group of orifices that regulates the flow rate of fluid flowing through the control valve to different flow rates, a means for detecting the amount and direction of the accelerator pedal opening, and a means for monitoring the operating states of the clutch and the accelerator pedal to ensure that the accelerator pedal opening is at a predetermined value. In the following, the half-clutch actuating means is operated only when the accelerator pedal operation direction is negative,
and control means for operating a clutch engagement actuation means when the accelerator pedal opening exceeds a predetermined value, and the half-clutch actuation means is a control valve for connecting operation of a flow path with a small flow rate in accordance with the accelerator pedal opening. The clutch actuating means operates the clutch actuator by operating the other contact action control valve in addition to the contact action control valve in the flow path with a small flow rate. Clutch control device for automatic transmission for vehicles.