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:
Mar. 01, 2016
Filed:
Dec. 03, 2012
Christian Michel, Ravensburg, DE;
Jürgen Wafzig, Eriskirch, DE;
Michael Wechs, Sigmarszell, DE;
Markus Renninger, Oerlenbach, DE;
Thomas Rosemeier, Meckenbeuren, DE;
Johannes Kaltenbach, Friedrichshafen, DE;
Christian Michel, Ravensburg, DE;
Jürgen Wafzig, Eriskirch, DE;
Michael Wechs, Sigmarszell, DE;
Markus Renninger, Oerlenbach, DE;
Thomas Rosemeier, Meckenbeuren, DE;
Johannes Kaltenbach, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A countershaft-type dual clutch transmission for a vehicle has two clutches having input sides connected to a driveshaft (AN) and output sides connected respectively to one of two transmission input shafts arranged coaxial to a mainshaft axis. A sub-transmission is associated in each instance with the transmission input shafts, at least two countershafts, a plurality of gear planes to which are assigned gear ratio steps, and at least one output shaft which can be connected to the sub-transmissions via an output gear plane. Only six gear planes with at least nine assigned gear ratio steps can be realized via only four double shift elements and at least one single shift element. Each countershaft can be coupled with four gear ratio steps via double shift elements, and one of the transmission input shafts can be coupled with a gear ratio step via a single shift element.