Audi Ag

Luk Getriebe-systeme Gmbh

Wmh Herion Antriebstechnik Gmbh

Thomas Suchandt

Hans-Peter Fleischmann

Oswald Friedmann

Karl Barnreiter

Christoph DÜTSCH

Stephan Ritzer

The present invention is related to an automatic transmission for a vehicle with an electrohydraulic control. More particularly, the hydraulic control unit and the electronic control unit are mounted adjacent relative to each other on a flange at an end of the transmission.

Automatic electrohydraulically controlled transmission

A change-speed transmission in the power train of a motor vehicle has a planetary gearing and coaxial radially inner and outer disc clutches, namely a direct clutch and a reverse clutch. At least that clutch which is engaged (i.e., in use) is cooled by a lubricant for the planetary gearing, and the flow of coolant to the clutches is regulated by the axially movable pressure plate of one of the clutches. A jet pump conveys lubricant from the sump in the transmission case into an axially extending channel of the input shaft of the transmission, and such channel forms part of a system of passages which supply coolant at least to that clutch which is then in use to transmit torque from the input shaft to an output element of the transmission.

Apparatus for cooling clutches on a transmission shaft

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Ingolstadt, Germany

Thomas Suchandt