Machine element or mechanism – Gearing – Interchangeably locked
Reexamination Certificate
2005-08-26
2008-12-16
Le, David D. (Department: 3681)
Machine element or mechanism
Gearing
Interchangeably locked
C074S329000, C074S340000, C477S143000, C477S156000, C477S158000, C477S164000
Reexamination Certificate
active
07464618
ABSTRACT:
A hydraulic control apparatus and method of controlling it for an automatic dual clutch transmission, which includes 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/releasing gears of the two partial transmissions. A first switching valve in a first position AIconnects a first pressure regulator to the first clutch and disconnects it from the shifting system and in a second position BIconnects the first pressure regulator to the shifting system and disconnects it from the first clutch, and that a second switching valve in a first position AIIconnects a second pressure regulator to the second clutch and disconnects it from the shifting system and in a second position BIIconnects the second pressure regulator to the shifting system and disconnects it from the second clutch.
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Eggert Ulrich
Leibbrandt Martin
Mohlmann Reinhard
Getrag Ford Transmissions GmbH
Le David D.
Schlee Alexander R.
Schlee IP International P.C.
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