Multi-group transmission of a motor vehicle

US8066606B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Alan DITTRICH · Friedrichshafen, DE
• Rayk Hoffmann · Friedrichshafen, DE

Key dates

• Filing date: Jun 3, 2009
• Grant date: Nov 29, 2011
• Expiry date: Jun 10, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19233
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A multi-group transmission of a vehicle is arranged in a drivetrain and includes traction force support during gearshift operations. A clutch mechanism, including a frictional clutch and two shifting clutches is arranged between a drive motor with a driveshaft and a transmission input shaft, such that the driveshaft can be connected to the transmission input shaft by one shifting clutch in a first shift position in combination with the frictional clutch or in a second shift position with bridging of the frictional clutch, such that the driveshaft can be directly connected to a main transmission shaft by the other shifting clutch in a shift position in active combination with the frictional clutch. In a method for operating the transmission, the frictional clutch is controlled and operated in combination with the first shifting clutch as a starting clutch and with the second shifting clutch as an intermediate-gear clutch.