Self-contained hydraulic coupling

Details Self-contained hydraulic coupling Self-contained hydraulic coupling

1998-10-22

2000-06-20

Marmor, Charles A

192 clutches and power-stop control

Clutches

Operators

192 7012, 192 702, 192103F, 19211334, F16D 2502

Patent

active

060766468

ABSTRACT:
A hydraulic coupling for use in motor vehicle driveline applications to limit speed differentiation and transfer drive torque between two rotary members. The hydraulic coupling includes a multi-plate clutch assembly operably connecting the two relatively rotatable members, and a sealed actuator assembly for actuating the clutch assembly in response to the magnitude of speed differentiation between the two rotary members. The actuator assembly includes a hydraulic pump and a piston which are sealed relative to the clutch assembly. The sealed actuator assembly includes an internal recirculation path for supplying hydraulic fluid retained therein between a low pressure supply chamber at the inlet side of the hydraulic pump and a high pressure piston chamber provided at the discharge side of the hydraulic pump. Hydraulic pressure in the piston chamber controls the magnitude of the clutch engagement force exerted by the piston on the clutch assembly. As a further feature, the recirculation path includes a flow restrictor which provides a bleed flow path for supplying high pressure fluid from the piston chamber to the supply chamber following cessation of the pumping action to release the clutch assembly.

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patent: 5779013 (1998-07-01), Bansbach
patent: 5827145 (1998-10-01), Okcuoglu

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