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:
Jun. 19, 2007
Filed:
May. 03, 2005
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Michael Ebenhoch, Friedrichshafen, DE;
Markus Maier, Friedrichshafen, DE;
Thomas John, Alitzheim, DE;
Gerhard Gumpoltsberger, Friedrichshafen, DE;
Michael Ebenhoch, Friedrichshafen, DE;
Markus Maier, Friedrichshafen, DE;
Thomas John, Alitzheim, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A dual clutch transmission with two clutches, two relative coaxial input shafts, two relative coaxial countershafts, two drive constants (gear trains, as well as one concentric transmission output shaft to the two drive shafts. Such a transmission structure is to be further embodied in such a way that through minor variations of gear mechanisms based on a construction module concept, seven-speed and eight-speed dual clutch transmissions with different direct gears, a different number of overdrive gears as well as different overall gear ratios can be manufactured. In accordance with a generic dual clutch transmission, the two countershafts by way of a coupling device can be rotationally connected with each other, and that on the countershaft embodied as hollow shaft, an idler gear is rotationally mounted, which meshes with a fixed gear on the transmission output shaft.