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:
Jul. 08, 2008
Filed:
Aug. 31, 2005
Andreas Hegerath, Bergheim, DE;
Reinhard Möhlmann, Köln, DE;
Martin Leibbrandt, Bedburg, DE;
Ulrich Eggert, Viersen, DE;
Andreas Hegerath, Bergheim, DE;
Reinhard Möhlmann, Köln, DE;
Martin Leibbrandt, Bedburg, DE;
Ulrich Eggert, Viersen, DE;
Getrag Ford Transmissions GmbH, Cologne, DE;
Abstract
The invention relates to a hydraulic system () for providing pressures and volumetric flows in a dual clutch transmission, in particular for providing a first volumetric flow for cooling and lubricating a first clutch () and for providing a second volumetric flow for cooling and lubricating a second clutch (). The hydraulic system is distinguished by the fact that at least one switching valve (), which in a first position guides a lubricating flow onto the first clutch () and a cooling flow onto the second clutch () and in a second position guides the lubricating flow onto the second clutch () and the cooling flow onto the first clutch (), is connected upstream of the first clutch () and the second clutch (). The cooling flow is preferably variable.