Hydraulic control system for a synchronizer

Details Hydraulic control system for a synchronizer Hydraulic control system for a synchronizer

1996-01-18

1997-09-16

Pitts, Andrea L.

192 clutches and power-stop control

Clutches

Operators

192 524, 192109F, F16D 2508

Patent

active

056670524

ABSTRACT:
A hydraulic control system for displacing a synchronizer into engagement with a rotating gear in a gearbox includes a hydraulic piston/cylinder unit mechanically coupled to the synchronizer, an electrically controllable pressure regulating valve for supplying hydraulic fluid to the piston/cylinder unit and an electrical control circuit acting on the pressure regulating valve to vary the pressure of the hydraulic fluid supplied to the piston/cylinder unit. In order to effect a rapid and smooth engagement of the synchronizer, the control circuit acts to increase the pressure of the hydraulic fluid supplied to the piston/cylinder unit progressively.

REFERENCES:
patent: 4884667 (1989-12-01), Koga
patent: 5487318 (1996-01-01), Schott

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