Method and device for adapting a clutch in a hybrid drive train of a vehicle

US7938209B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Martin Dilzer · Laufenburg (Baden), DE
• Michael Reuschel · Ottersweier, DE
• Thomas Eggert · Pforzheim, DE

Key dates

• Filing date: May 26, 2009
• Grant date: May 10, 2011
• Expiry date: Nov 6, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S903/946
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for adapting torque characteristic in a disengaging clutch arranged in a vehicle hybrid drive train between an internal combustion engine and an electrical machine connected to a driven wheel, include the following steps: deciding the engine can be disconnected; switching the engine off and opening the clutch; detecting the time gradient of rotational speed of the engine with it switched off and the clutch opened; partially closing the clutch when rotational speed of the engine falls below a predetermined value, and detecting the time gradient of rotational speed of the engine with the clutch partially closed; determining the clutch torque transmitted by the partially closed clutch by evaluating detected time gradients of rotational speed of the engine; and adapting the characteristic of the clutch with the aid of the determined clutch torque transmitted by the partially closed clutch.