Coupling device

Details Coupling device Coupling device

2011-07-05

2011-07-05

Lorence, Richard M. (Department: 3655)

192 clutches and power-stop control

Clutches

Operators

C192S085610, C192S085630, C192S113340

Reexamination Certificate

active

07971697

ABSTRACT:
A clutch device for a motor vehicle has friction elements around which coolant flows and which, by way of a piston, can be pressed against one another for torque transmission. The first piston side is acted on with operating pressure, and the second piston side is acted on with coolant pressure. A valve, by which the operating pressure can be set, and a device which makes a reaction of the coolant pressure on the operating pressure possible are provided. The device is designed as a hydraulic resistance cascade and is connected between coolant supply and coolant return lines of the friction elements. A return pressure line branches off in the center of the hydraulic resistance cascade and is connected to the valve.

REFERENCES:
patent: 3351169 (1967-11-01), McIndoe
patent: 4644968 (1987-02-01), Chatterjea
patent: 6827191 (2004-12-01), Kuhstrebe
patent: 2004/0159523 (2004-08-01), Duan et al.
patent: 198 38 443 (1999-03-01), None
International Search Report dated Jul. 25, 2005 with an English translation of the pertinent portions (Four (4) pages).

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