Method for actuating a clutch of a drivetrain

US8219294B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Peter Herter · Ravensburg, DE
• Joachim Staudinger · Ravensburg, DE
• Rainer Petzold · Friedrichshafen, DE
• Franz Bitzer · Friedrichshafen, DE

Key dates

• Filing date: May 27, 2008
• Grant date: Jul 10, 2012
• Expiry date: Mar 20, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2500/70442
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method for actuating a clutch (6) of a drivetrain of a motor vehicle such that, when the motor vehicle is rolling downhill with the accelerator pedal not being actuated and when the motor vehicle is coasting on level ground with the accelerator pedal not being actuated, a clutch position of the clutch (6) is determined as a function of a rotational speed difference between an input speed of a transmission (2) of the drivetrain and an idling speed of a power engine (1) of the drivetrain. The method includes the steps of determining the clutch position from the rotational speed difference between the transmission input speed and the power engine idling speed and correcting the clutch position using at least one parameter that depends on acceleration of the motor vehicle.