Dual-clutch transmission

US9273757B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Christian Michel · Ravensburg, DE
• Jürgen Wafzig · Bermatingen, DE
• Michael Wechs · Weißensberg, DE
• Markus Renninger · Oerlenbach, DE
• Thomas Rosemeier · Meckenbeuren, DE
• Johannes Kaltenbach · Friedrichshafen, DE

Key dates

• Filing date: Dec 3, 2012
• Grant date: Mar 1, 2016
• Expiry date: Dec 3, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19228
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

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.