KR950017365A - 5-speed automatic transmission hydraulic control system for automobile - Google Patents

Abstract

The present invention relates to an automatic transmission hydraulic control system for automobiles, and has a five-speed shift stage, and a torque pressure control and a drive pressure control are sequentially performed to improve the feeling of shifting and to enable a shift shifting to speed up response. To ensure that; An oil pump forming oil pressure, a pressure regulating valve for regulating the line pressure generated by the oil pump to a hydraulic pressure suitable for forward and backward running, and a drive pressure and a reverse pressure supplied according to the valve spool position of the manual valve. A shifting first control unit having five forward friction elements, two reverse friction elements, and at least two shift valves selectively supplying hydraulic pressure to the friction elements, each of which operates at a gear shift stage suitable for a vehicle speed; Provided is a five-speed automatic transmission hydraulic control system for an automobile comprising a second shift control unit and a torque pressure converting unit for supplying a torque pressure to the above-mentioned first shift control unit.

Description

5-speed automatic transmission hydraulic control system for automobile

Since this is an open matter, no full text was included.

1 is a hydraulic circuit diagram in the hydraulic control system "N" (neutral) range according to the present invention.

2 is a view for explaining the configuration of the hydraulic control system of the present invention,

2 is a diagram illustrating a damper clutch control unit and a pressure control unit;

2 is a configuration diagram of the torque pressure converting unit.

2 is a configuration diagram of the first shift control unit,

2 is a configuration diagram of a second shift control unit.

3 is a power train system diagram for shifting by the hydraulic control system of the present invention.

4 is a hydraulic circuit diagram of the hydraulic control system of the present invention formed in the "D" range 1 speed.

Claims (3)

Oil pump (4) for generating oil pressure by the drive gear that rotates when the engine is driven, and pressure control valve (6) for supplying oil pressure from the oil pump (4) to properly change the oil pressure when the vehicle is moving forward or backward A torque converter 2 for transmitting the driving force of the engine to the input shaft of the transmission, a converter clutch regulator valve 12 for supplying an operating pressure of the damper clutch for increasing the power transmission efficiency of the torque converter, and the pressure described above. A solenoid for supplying a reduced pressure to the first, second, third, fourth, fifth, sixth and seventh solenoid valves S1, S2, S3, S4, S5, S6, and S7 by receiving the line pressure from the control valve 6. In order to operate the feed valve 18, the shift stage friction element at the primary torque pressure, the torque switch control switch valve 22 for torque direction changeover and the torque control switch valve 22 described above are used to operate the shift stage friction element. To the required torque pressure The torque control regulator valve 24 to be supplied, the first friction element 80 acting in common at 1,2, 3, and 4 stages, and the second friction element 52 acting as one or two or more gears for each shift stage. ), The third friction element 58, the fourth friction element 64, the fifth friction element 70, the sixth friction element 78, and the seventh friction element 82, and the first and second elements. The torque pressure supplied from the control switch valve 22 or the drive pressure supplied from the pressure regulating valve 6 may be selectively selected by the on / off action of the three solenoid valves S1, S2, and S3. 1-2 shift valves 36, 2-3 shift valves 44, 3-4 shift valves 46, 405 shift valves 48 for shifting by supplying the respective friction elements, and the above-mentioned torque pressures A second clutch valve controlled by the drive pressure to supply the operating pressure to each shift stage friction element and to supply the operating pressure of the next shift stage to the shift valves described above. 54, a third clutch valve 60, a fourth band valve 66, and an overdrive unit valve 72, and adjusts the inlet pressure adjusted by the pressure regulating valve 6 according to the selected position of the shift lever. And a manual valve 30 for supplying the shift valves or the reverse friction element 74, and a drive pressure line 32 leading from the manual valve 30 is connected to the fourth band valve 66. A five-speed automatic transmission hydraulic control shift system for an automobile configured to operate the first friction element 80 at 1,2,3 speeds. According to claim 1, wherein the reverse friction element 74 is connected directly to the manual valve 30 and the reverse pressure pipeline 76 is a five-speed automatic for automobile having a connection configuration that can be supplied with hydraulic pressure using the line pressure control Transmission hydraulic control system. The reverse pressure pipeline 76 for supplying the hydraulic pressure to the reverse friction element 74 when the shift mode is selected from the "D" (traveling) range to the "R" range (reverse). A reverse clutch inhibitor valve 26 is installed to prevent the vehicle from reversing, so that emergency safety means for stopping the hydraulic pressure supplied to the sixth friction element 78 is installed. system. ※ Note: The disclosure is based on the initial application.