Patent · US Expired

Method for determing a transmittable torque of a clutch in an automatic transmission of a motor vehicle

US7131932B2 · kind B2 · utility

5Cited by

3References

11Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Jörg Fähland · Gifhorn, DE
Bernd Cappelmann · Wendeburg, DE
Rainer Hofmann · Goldkronach, DE

Key dates

Filing date	Aug 25, 2005
Grant date	Nov 7, 2006
Priority date	—
Expiry date	Aug 25, 2025

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/2823
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A method for determining a transmittable torque of a clutch of an automatic transmission of a motor vehicle, in particular an automated shift transmission, uses the clutch for transmitting torque from an engine shaft to a transmission input shaft and uses a synchronizing device for selectively engaging and disengaging a gear stage in the automatic transmission. The gear stage is pre-synchronized with the synchronizing device by applying a given synchronizing force to the synchronizing device but without engaging the gear stage. Speeds of the engine shaft and of the transmission input shaft are measured. The torque transmitted by the clutch is determined by comparing the speeds of the engine shaft and of the transmission input shaft while taking into account a current synchronizing force.

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