Patent · US Active

Method for determining a torque characteristic of an automated friction clutch

US8000869B2 · kind B2 · utility

4Cited by

5References

8Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Rainer Petzold · Friedrichshafen, DE
Peter Herter · Ravensburg, DE
Franz Bitzer · Friedrichshafen, DE

Key dates

Filing date	Apr 25, 2007
Grant date	Aug 16, 2011
Priority date	—
Expiry date	Sep 12, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16D2500/70605
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method for determining a torque characteristic of a friction clutch located in a drive train of a motor vehicle in the force flow between a drive engine and a transmission and which is closed in its rest position. At least two marker points of a regulating-path-dependent torque characteristic are determined, one of which is determined at a slipping limit of the clutch. To enhance determination of the torque characteristic, a first marker point is determined with the clutch engaged, the transmission in neutral and the engine running, by slowly disengaging the clutch until a reduction in the speed of the transmission input shaft relative to the engine speed is detected. A corresponding pair of values of this marker point with the known braking torque of the input shaft and the set position are used for adapting an existing characteristic.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.