Patent · US Expired

Function testing device for an actuator system such as a automatic friction clutch used with a motor vehicle gearbox

US5847272A · kind A · utility

20Cited by

7References

20Claims

0Family size

Assignee

Fichtel & Sachs · DE

Inventors

Hans-Jurgen Schneider · Arnstein, DE
Rainer Reuthal · Unterpleichfeld, DE
Ingo Carl · Gochsheim, DE

Key dates

Filing date	Feb 14, 1997
Grant date	Dec 8, 1998
Priority date	—
Expiry date	Feb 14, 2017

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/1288
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

To be able to verify the function of the actuator system of an automatic clutch or of an automatic transmission of a motor vehicle as a function of the current conditions, including while the motor vehicle is in motion is necessary, the invention teaches that a test circuit actuates the actuator system, starting from a first specified operating position of the clutch or of the transmission to a second specified operating position of the clutch or of the transmission, into an actuator test position in which the clutch or the transmission is still essentially in its first operating position. The test circuit, in the actuator test position, tests the functional capability as a function of data stored in a data memory, which stored data are compared to data measured in the actuator test position of a changing operating parameter.

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