Hydraulic control apparatus for an automatic dual clutch...

Details Hydraulic control apparatus for an automatic dual clutch... Hydraulic control apparatus for an automatic dual clutch...

2011-07-12

2011-07-12

Wright, Dirk (Department: 3655)

Machine element or mechanism

Gearing

Interchangeably locked

Reexamination Certificate

active

07975566

ABSTRACT:
A hydraulic control apparatus for an automatic dual clutch transmission, comprising a first clutch with a first partial transmission and a second clutch with a second partial transmission, as well as a shifting system for engaging/disengaging gears of the two partial transmissions, a control unit having a first pressure regulator and a second pressure regulator actuating the first and second clutches and actuating the shifting system, and a switching apparatus. The shifting apparatus comprises a first changeover valve and a second changeover valve. Both changeover valves can be shifted from a first to a second position for allowing a safe emergency running mode of a motor vehicle in case of any failure of the first or second pressure regulator.

REFERENCES:
patent: 4495837 (1985-01-01), Morscheck
patent: 1635091 (2006-03-01), None

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