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:
May. 19, 2015
Filed:
Aug. 03, 2011
Ralf Dreibholz, Meckenbeuren, DE;
Juergen Wafzig, Eriskirch, DE;
Michael Wechs, Lindau, DE;
Markus Renninger, Oerlenbach, DE;
Thomas Rosemeier, Meckenbeuren, DE;
Johannes Kaltenbach, Friedrichshafen, DE;
Rudolf Kauffeldt, Bodolz, DE;
Ralf Dreibholz, Meckenbeuren, DE;
Juergen Wafzig, Eriskirch, DE;
Michael Wechs, Lindau, DE;
Markus Renninger, Oerlenbach, DE;
Thomas Rosemeier, Meckenbeuren, DE;
Johannes Kaltenbach, Friedrichshafen, DE;
Rudolf Kauffeldt, Bodolz, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A dual clutch transmission designed as a reduction gearing which has concentric central and hollow transmission shafts, exactly one layshaft, and two power shift elements. A hollow shaft is provided coaxially on the layshaft, which can be rotatably fixed to the layshaft, via one shift device, and to which at least two gears of the gear stages are rotatably fixed. A further hollow shaft is provided coaxially on either the central or the hollow transmission shaft, which can be connected, via one of the shift devices, with the central or the hollow transmission shaft and to which at least two further gears of the gear stages are rotatably fixed. At least three transmission ratios are obtainable as a result of engaging the shift element into the power flow in three of the gear stages, by which one transmission ratio results from engaging only one shift element into the power flow.