Method of specifying and diagnosing abnormalities in partially-c

Details Method of specifying and diagnosing abnormalities in partially-c Method of specifying and diagnosing abnormalities in partially-c

1999-03-01

2000-08-01

Raevis, Robert

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

060949767

ABSTRACT:
A method for automatic control of a friction clutch (1) in a vehicle, which clutch is designed to be disengaged and engaged by a clutch actuator (3) under automatic control. An initial partially engaged clutch stroke position (Q1) and an initial clutch stroke position (P1) at which fluid pressure in the clutch actuator reaches a prescribed value are detected to obtain a difference (R1) between said two clutch stroke positions prior to initiation of automatic clutch control. The friction clutch wears as it is used. Therefore, both of the partially engaged clutch stroke position and the clutch stroke position attaining the prescribed fluid pressure value change while the automatic clutch engagement/disengagement control is being performed. However, the difference between these two clutch stroke positions does not change. A current clutch stroke position attaining the predetermined fluid pressure is only detected during the automatic clutch control, and a current partially engaged clutch stroke position (Q2) is determined by adding the difference (R1) to the detected clutch stroke position (P2).

REFERENCES:
patent: 5782710 (1998-07-01), Kosik et al.
patent: 5902344 (1999-05-01), Eike et al.

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