The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2008
Filed:
Aug. 26, 2005
Reinhard Mohlmann, Köln, DE;
Martin Leibbrandt, Bedburg, DE;
Ulrich Eggert, Viersen, DE;
Getrag Ford Transmissions GmbH, Cologne, DE;
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 Aconnects a first pressure regulator to the first clutch and disconnects it from the shifting system and in a second position Bconnects 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 Aconnects a second pressure regulator to the second clutch and disconnects it from the shifting system and in a second position Bconnects the second pressure regulator to the shifting system and disconnects it from the second clutch.