Diagnostic system for rotational speed sensors in drive train of

Details Diagnostic system for rotational speed sensors in drive train of Diagnostic system for rotational speed sensors in drive train of

1989-06-07

1990-08-07

Chin, Gary

Boots, shoes, and leggings

36442405, 364565, 324161, 731181, 180233, 180249, G01M 1900, G01P 304

Patent

active

049473255

ABSTRACT:
A diagnostic system for detecting failure of rotational speed sensors incorporated in a central differential device of a four wheels drive vehicle for the purpose of controlling a lock-up clutch in the central differential device, wherein the rotational speed sensor for an output rotational member of the central differential device is checked, when the rotational speed detected thereby is lower than the rotational speed detected by the other rotational sensor, if the rotational speed detected thereby is continually zero over a period such as 10 seconds while the output of the other rotational speed sensor is above a certain low value.

REFERENCES:
patent: 4700563 (1987-06-01), Iwata et al.
patent: 4759212 (1988-07-01), Sawada et al.
patent: 4776421 (1988-10-01), Kashihara
patent: 4777611 (1988-10-01), Tashiro et al.
patent: 4876527 (1989-10-01), Oka et al.

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