Hydraulic clutch and transmission actuating system

Details Hydraulic clutch and transmission actuating system Hydraulic clutch and transmission actuating system

1991-04-01

1992-04-21

Braun, Leslie A.

192 clutches and power-stop control

Transmission control and clutch control

Common control

192 85R, F16D 2514

Patent

active

051059223

ABSTRACT:
A hydraulic actuating system for disengaging a clutch, shifting gears in a transmission and reengaging the clutch for a vehicle. An electric pump delivers hydraulic fluid under pressure to an accumulator. High and low pressure switches control operation of the pump to maintain the hydraulic fluid pressure within a desired range, while limiting operating time of the pump and minimizing energy waste. The pressurized fluid from the accumulator is applied through valves to operate a clutch actuating mechanism and to shift transmission gears. A secondary accumulator is provided at the clutch actuating mechanism to provide smoother clutch reengagement with a low cost valve having a relative coarse modulation capacity.

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