Dual clutch transmission designed as reduction gearing

US9032823B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Ralf Dreibholz · Meckenbeuren, DE
• Juergen Wafzig · Eriskirch, DE
• Michael Wechs · Weißensberg, DE
• Markus Renninger · Oerlenbach, DE
• Thomas Rosemeier · Meckenbeuren, DE
• Johannes Kaltenbach · Friedrichshafen, DE
• Rudolf Kauffeldt · Bad Schussenried, DE

Key dates

• Filing date: Aug 3, 2011
• Grant date: May 19, 2015
• Expiry date: Jan 11, 2032

Classification

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

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.