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:
Nov. 06, 2018
Filed:
Nov. 06, 2015
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Bernd Schepperle, Constance, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A dual-clutch transmission has first and second coaxial input shafts, the second shaft extending through the first shaft. The input shafts couple respective countershafts via input constants which have drive input and output wheels. The countershafts are selectively connectable, via spur gear stages that can be engaged by gearshift elements, to an output shaft. Four gear stages engage forward gears and one reverse gear stage engages reverse gears. The second and fourth gear stages are arranged between the first countershaft and the output shaft, and the other gear stages are arranged between the second countershaft and the output shaft. The first input constant has a higher gear ratio than the second input constant. The output of the first input constant is a loose wheel supported on the second countershaft and can couple the first countershaft by a first coupling element. A second coupling element couples the first and second countershafts.