Method and device for controlling a motor vehicle drive train

US6413189B1 · kind B1 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Martin Spiess · Gerlingen, DE
• Christoph Goebel · Markdorf, DE
• Willibald Probst · Schallstadt, DE

Key dates

• Filing date: Dec 20, 2000
• Grant date: Jul 2, 2002
• Expiry date: Dec 20, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0485
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Method and device for controlling a motor vehicle drive train. To reverse the travel direction, the input torque is transmitted with pressure modulation from one clutch (Kv) of one travel direction to one clutch (Kr) of the opposite travel direction. If at the time that a reverse travel direction is selected and the speed of travel exceeds a set maximum value (VR,max), the speed of travel is automatically reduced to the maximum value first by continuous change of the ratio of the transmission (2) of the drive train.