Frictional engaging clutch control system for automatic vehicle

Details Frictional engaging clutch control system for automatic vehicle Frictional engaging clutch control system for automatic vehicle

1997-11-26

2000-02-15

Wright, Dirk

Interrelated power delivery controls, including engine control

Clutch control

Condition responsive control

477174, 477181, 477102, F16H 900

Patent

active

06024674&

ABSTRACT:
A frictional engaging clutch for an automatic vehicle transmission which discriminates judder which has occurred on the vehicle and controls to decrease the same. A clutch slip ratio is calculated, the calculated ratio is then converted into an ac waveform which is filtered by filters similar to a judder filter and a disturbance filter to extract frequency components of an appropriate range, and the number of times (NTEX) at which the filtered waveform peaks exceeds threshold values (appropriately set) is counted, and based on the counts, the judder is discriminated or determined. The configuration is simple and makes it possible to discriminate judder in an automatic vehicle transmission.

REFERENCES:
patent: 5213186 (1993-05-01), Murata
patent: 5226513 (1993-07-01), Shibayama
patent: 5347885 (1994-09-01), Taga et al.
patent: 5425687 (1995-06-01), Taga et al.
patent: 5611752 (1997-03-01), Kamada et al.
patent: 5620390 (1997-04-01), Kono et al.
patent: 5643136 (1997-07-01), Kono et al.

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