Hydraulic control system of an automatic transmission with high-

Details Hydraulic control system of an automatic transmission with high- Hydraulic control system of an automatic transmission with high-

1997-08-28

1999-06-01

Marmor, Charles A

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477130, 477131, 477163, F16H 6126

Patent

active

059083719

ABSTRACT:
A hydraulic control system for an automatic transmission includes a hydraulic pressure source, a line pressure controller for constantly controlling hydraulic pressure from the hydraulic pressure source, a reducing pressure controller for generating reduced pressure, a damper clutch controller for supplying hydraulic pressure fed from the line pressure controller to a torque converter, a shift controller for converting hydraulic pressure from the line pressure controller into drive pressure corresponding to each speed stage, a hydraulic controller for controlling drive pressure from the shift controller; and a pressure distributer for distributing hydraulic pressure from the hydraulic controller to each friction member for each speed stage by being controlled by drive pressure from the shift controller. The line pressure controller includes a regulator valve controlling hydraulic pressure from the hydraulic pressure source to line pressure and a high-low control valve controlled by reduced pressure from the reducing controller, control pressure from the damper clutch controller, and third speed drive pressure from the shift controller, and supplying second drive pressure from the shift controller to the regulator valve, thereby controlling an operation of the regulator valve together with forward/reverse drive pressure fed from the shift controller to the regulator valve.

REFERENCES:
patent: 4106369 (1978-08-01), Taga
patent: 5658220 (1997-08-01), Jang
patent: 5674153 (1997-10-01), Jang

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