KR20020015775A - Hydraulic damper clutch control device of automatic transmission - Google Patents

Abstract

PURPOSE: A hydraulic control system of a damper clutch for an automatic transmission in a vehicle is provided to control a damper clutch conveniently by controlling discharge at inoperative pressure with forming operative pressure without cavitation of a torque converter. CONSTITUTION: Hydraulic pressure is supplied from an oil pump(2), and regulated with a regulator valve(4). Adjusted hydraulic pressure is supplied to an operative pressure part(14) or an inoperative pressure part(12) of a damper clutch through a torque converter pressure control valve(6). Output pressure is formed with hydraulic pressure at operative and inoperative parts and a cooler(10) by inputting hydraulic pressure supplied to a torque converter(TC). Output pressure of a damper clutch control solenoid valve(18), Pressure of a reducing valve, and inoperative pressure of the damper clutch are connected to the control pressure. Pressure is supplied from the torque converter to the inoperative part in releasing the damper clutch, and the operative part is connected to the cooler. Inoperative pressure is discharge in operating the damper clutch, and the pressure of the torque converter is connected to the operative part and the cooler. The damper clutch is controlled conveniently with discharging inoperative pressure in connecting or releasing.

Description

HYDRAULIC DAMPER CLUTCH CONTROL DEVICE OF AUTOMATIC TRANSMISSION}

The present invention relates to a hydraulic control system of a damper clutch applied to an automatic transmission for a vehicle.

For example, an automatic transmission for a vehicle has a torque converter and a power train, which is a multistage transmission gear mechanism connected to the torque converter, and selectively selects one of the operating elements of the power train according to the driving state of the vehicle. It will have a hydraulic control system for operation.

In such an automatic transmission, a damper clutch for directly connecting the output stage of the engine and the input stage of the automatic transmission is applied to the torque converter as necessary.

The damper clutch is actuated / non-operated by hydraulic pressure. The damper clutch is controlled by the actuating side pressure control method and the non-actuating side control method. The operating side pressure is lowered and the operating side pressure is raised under the control of the transmission control unit while the non-operating side pressure is completely released.

The non-operating side pressure control method is a method of increasing the operating side pressure instantaneously when the damper clutch is directly connected to reach a predetermined level, and then lowering the non-operating side pressure under the control of the transmission control unit.

In view of the above, the configuration of the conventional damper clutch control device, as shown in FIG. 5, when the oil pump 200 is operated by the operation of the engine and pumps hydraulic pressure, is regulated to a constant pressure by the regulator valve 202. A part of the hydraulic pressure is supplied to the damper clutch control valve 206 through the torque converter pressure control valve 204 and then to the operating pressure or non-operating pressure of the damper clutch in the torque converter TC.

When the hydraulic pressure is supplied to the torque converter TC, the hydraulic pressure is discharged and supplied to the lubrication unit of the automatic transmission, which is cooled through the cooler 208, and a part of the hydraulic pressure passing through the torque converter pressure control valve 204 is also provided. Supplied to the cooler 208.

In addition, the damper clutch control valve 206 is controlled by a control pressure supplied to three places, the control pressure is supplied directly from the reducing valve 212 for reducing the hydraulic pressure supplied from the regulator valve 202 again A first control pressure, a second control pressure for controlling and supplying the hydraulic pressure supplied from the reducing valve 212 by the damper clutch control solenoid valve 214, and a third control pressure which is a part of the operating side pressure of the torque converter.

In the above, the second and third control pressures are supplied to the opposite side to the first control pressure, and the second and third control pressures have a configuration in which a ballistic member 216 is provided to push the valve spool to the first control pressure supply side at all times. .

Accordingly, when the damper clutch is released, the damper clutch control valve 206 is switched to the left in the drawing so that the output pressure of the torque converter pressure control valve 204 is supplied to the non-operating side and supplied to the torque converter TC. The hydraulic pressure is discharged through the operating side port after operating as the working medium and flows into the cooler 208 via the damper clutch control valve 206.

When the damper clutch operates, when the damper clutch control valve 206 is switched to the right in the drawing, the hydraulic pressure supplied from the regulator valve 202 is supplied to the operating side after the non-operating side hydraulic pressure is discharged first, and the torque converter pressure The output pressure of the control valve 204 has a flow path returned from the damper clutch control valve 206 and supplied to the cooler 208.

However, according to the conventional damper clutch control device as described above, when the non-operating side pressure is first discharged through the damper clutch control valve during the operation control of the damper clutch, the operating side pressure is increased, and the torque converter cavitation phenomenon is likely to occur. In this section, the fluid flow in the torque converter is not good, and the clutch transmission torque is controlled only by the operating side pressure.

Therefore, the present invention has been invented to solve the above problems, the object of the present invention is that the torque converter cavitation phenomenon does not occur during the operation control of the damper clutch, discharge of the non-operating side pressure in a state where the operating side pressure is secured to a certain level By providing the control, the damper clutch hydraulic pressure control system of the automatic transmission for a vehicle with which damper clutch control is easy is provided.

1 is a hydraulic circuit diagram when hydraulic pressure is supplied to a non-operating side of a damper clutch according to the present invention.

Figure 2 is a hydraulic circuit diagram when the hydraulic pressure is supplied to the operating side of the damper clutch by the present invention.

3 is a configuration diagram of a damper clutch control valve applied to the present invention, the operation when the hydraulic pressure is supplied to the non-operating side.

Figure 4 is a configuration diagram of a damper clutch control valve applied to the present invention, the operation when the hydraulic pressure is supplied to the operating side.

5 is a block diagram of a conventional damper clutch hydraulic control system.

In order to realize this, according to the present invention, the hydraulic pressure supplied from the oil pump is regulated to a constant pressure by the regulator valve, and a part of the hydraulic pressure is controlled by the torque converter pressure control valve and the torque converter control valve, or the operating pressure or non- In the damper clutch hydraulic control system of an automatic transmission for a vehicle configured to be supplied to the working pressure side,

The damper clutch control valve is configured to input the hydraulic pressure supplied to the torque converter as an output pressure for the non-operating side, the operating side hydraulic pressure, and the cooler hydraulic pressure of the damper clutch,

The output pressure of the damper clutch control solenoid valve, the reducing valve pressure, and the non-operating side pressure of the damper clutch are connected to the control pressure,

When the damper clutch is released, the torque converter supply pressure is supplied to the non-operating side, and the operating side pressure is connected to the cooler,

When the damper clutch is operated, the non-operating side pressure is discharged and the torque converter supply pressure is connected to the operating side and the cooler,

Provided is a damper clutch hydraulic control system of an automatic transmission for a vehicle configured to control non-operating side pressure when directly connected and released.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

1 is a configuration diagram of a damper clutch hydraulic control system according to the present invention, when the oil pump 2 is operated by the operation of the engine and the hydraulic pressure is pumped, a part of the hydraulic pressure adjusted to a constant pressure by the regulator valve 4 is Branched in two ways through the torque converter pressure control valve (6) and supplied to the damper clutch control valve (8), the hydraulic pressure on one side is supplied to the operating pressure or non-operating pressure side of the damper clutch in the torque converter (TC), the other side The hydraulic pressure of the standby state in the non-operating state, in the operating state is cooled through the cooler 10 is supplied to the lubrication portion of the automatic transmission not shown.

Then, the hydraulic pressure supplied to the non-operating side 12 of the torque converter TC and discharged to the operating side 14 port flows into the cooler 10 and is supplied to the operating side 14 and then to the non-operating side ( The hydraulic pressure discharged to 12) is discharged as it is.

In addition, the damper clutch control valve 8 is controlled by the control pressure supplied to three places, the control pressure is supplied from the reducing valve 16 for reducing the hydraulic pressure supplied from the regulator valve 4 again. And a first control pressure controlled by the damper clutch control solenoid valve 18 and supplied, a second control pressure supplied directly from the reducing valve 16, and a third control pressure which is a part of the non-operating side pressure of the torque converter. .

In the above, the second and third control pressures are supplied to the opposite side to the first control pressure, and the first control pressure side has a configuration in which a bullet member 20 for pushing the valve spool at all times to the second and third control pressure supply sides is arranged. .

Accordingly, when the damper clutch is released, as shown in FIG. 1, the damper clutch control valve 8 is switched to the left in the drawing so that one of the output pressures of the torque converter pressure control valve 6 is not operated. Is supplied to the cooler 10 via the damper clutch control valve 8 through the operating side 14 port, and the other of the output pressure of the torque converter pressure control valve 6 is damper. Stand by the damper clutch control valve (8) in case the clutch is connected directly.

When the damper clutch is operated, as shown in FIG. 2, when the damper clutch control valve 8 is switched to the right in the drawing, the hydraulic pressure of the non-operating side 12 is discharged from the damper clutch control valve 8, and the torque converter control is performed. One of the output pressures of the valves 6 is supplied to the operating side 14 of the torque converter TC to operate the damper clutch, and the other one flows out of the damper clutch control valve 8 to the cooler 10. .

In the operation control of the damper clutch as described above, the operating side pressure of the damper clutch first rises to a predetermined pressure, and after that, the non-operating side pressure is released by the control. The configuration of the damper clutch control valve 8 is more specifically described. Looking at it as follows.

As shown in FIG. 3, the valve body includes a first and second ports 100 and 102 to which hydraulic pressure is supplied from the torque pressure control valve 6, and a hydraulic pressure hydraulic pressure through the first port 100. A third port 104 for supplying to the operating side 14 of TC), a fourth port 106 for selectively supplying hydraulic pressure of the second and third ports to the cooler 10, and the first port. A fifth port 108 for supplying the hydraulic pressure supplied to the non-operating side of the torque converter TC, a sixth port 110 for receiving control pressure from the damper clutch control solenoid valve 18, and A seventh port 112 supplied with a control pressure from the pressure valve 16, an eighth port 114 with a partial control pressure of the hydraulic pressure supplied to the fifth port 108, and the fifth port ( It comprises a discharge port (EX) for discharging the hydraulic pressure of the 108.

In addition, the valve spool embedded in the valve body has a hydraulic pressure supplied to the sixth port 110, and selectively connects the fifth port 108 and the discharge port EX to the first land 120. A second land 122 that selectively connects the first port 100 to the third port 104 and the fifth port 108, and selectively connects the fourth port 106 to the second port ( The third land 124 communicating with the third port 104 and the fourth land controlling the opening amount of the second port 102 while acting on the hydraulic pressure supplied to the seventh port 112. 126 and a fifth land 128 acting on the hydraulic pressure supplied to the eighth port 114, wherein the carbon member 20 is disposed between the first land 120 and the valve body. Is burnt.

As shown in FIG. 3, the second land 122 and the third land 124 partially cover the first port 100 and the fourth port 106 in a state where hydraulic pressure is supplied to the non-operating side 12. The discharge port EX is formed at a position that can be opened after the first port 100 and the third port 104 communicate with each other when the hydraulic pressure is supplied to the operating side 14.

Accordingly, when the hydraulic pressure is supplied to the operating side, as shown in FIG. 4, the first port 100 and the third port 104 start to communicate with each other in the process of moving to the left side in the drawing. When the hydraulic pressure is started, and the valve spool moves further to the left side, the discharge port EX and the fifth port 108 communicate with each other, and discharge is performed.

As described above, according to the present invention, the actuating side pressure of the damper clutch first rises to a predetermined pressure during the operation control of the damper clutch, and then the non-operating side pressure is released and controlled, thereby cooperating the torque converter during the operation control of the damper clutch. It is an invention in which damper clutch control is very easy by performing discharge control of non-operating side pressure in the state in which a phenomenon does not generate | occur | produce and a working side pressure is kept to a certain level.

Claims (3)

Part of the hydraulic pressure from the oil pump to the constant pressure controlled by the regulator valve is configured to be supplied to the operating pressure or non-operating pressure side of the damper clutch in the torque converter through the torque converter pressure control valve and the torque converter control valve In the damper clutch hydraulic control system of the automatic transmission, The damper clutch control valve is configured to input the hydraulic pressure supplied to the torque converter as an output pressure for the non-operating side, the operating side hydraulic pressure, and the cooler hydraulic pressure of the damper clutch, The output pressure of the damper clutch control solenoid valve, the reducing valve pressure, and the non-operating side pressure of the damper clutch are connected to the control pressure, When the damper clutch is released, the torque converter supply pressure is supplied to the non-operating side, and the operating side pressure is connected to the cooler, When the damper clutch is operated, the non-operating side pressure is discharged and the torque converter supply pressure is connected to the operating side and the cooler, The damper clutch hydraulic control system of an automatic transmission for a vehicle, characterized in that the non-operating side pressure is controlled during direct connection and release. The damper clutch control valve of claim 1, wherein the damper clutch control valve includes: first and second ports for supplying hydraulic pressure from the torque pressure control valve, and a third port for supplying hydraulic pressure hydraulic pressure through the first port to the operating side of the torque converter, The fourth port for supplying the hydraulic pressure of the second and third ports to the cooler, the fifth port for supplying the hydraulic pressure supplied to the first port to the non-operating side of the torque converter, and the control pressure from the damper clutch control solenoid valve. A sixth port to be supplied, a seventh port to receive a control pressure from a reducing valve, an eighth port to receive a partial control pressure of the hydraulic pressure supplied to the fifth port, and to discharge the hydraulic pressure of the fifth port A valve body including a discharge port; Hydraulic pressure supplied to the sixth port acts and selectively connects the fifth port and the discharge port, and the second land selectively communicates the first port to the third port and the fifth port. And a third land for selectively communicating the fourth port with the second port and the third port, a fourth land for controlling the opening amount of the second port while acting on the hydraulic pressure supplied to the seventh port; And a fifth land acting on the hydraulic pressure supplied to the eighth port, and between the first land and the valve body, a valve spool in which a carbon member is carried is included. Damper clutch hydraulic control system. The method of claim 2, wherein the second land and the third land of the valve spool are formed in a position capable of closing a portion of the first port and the fourth port in the state that the hydraulic pressure is supplied to the non-operation side, the discharge port of the valve body The damper clutch hydraulic control system of an automatic transmission for a vehicle, characterized in that formed in a position that can be opened after the first port and the third port is in communication when the hydraulic pressure is supplied to the operating side.