Apparatus and method for diagnosing faults in a hydraulic type l

Details Apparatus and method for diagnosing faults in a hydraulic type l Apparatus and method for diagnosing faults in a hydraulic type l

1994-12-28

1997-02-04

Pitts, Andrea L.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 33, 192 85R, F16D 2508

Patent

active

055989071

ABSTRACT:
The oil amount of operating oil flowing in a relief path to an oil pan from a solenoid valve for switching between engagement/disengagement of a hydraulic type lock-up clutch provided in a torque converter is detected. A solenoid valve fault is judged when in spite of control of the solenoid valve to relieve the operating oil, the relief oil amount is smaller than an estimated value.

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patent: 4660690 (1987-04-01), Nishikawa et al.
patent: 4768632 (1988-09-01), Moan
patent: 4768635 (1988-09-01), Sukurai et al.
patent: 4795015 (1989-01-01), Hibino et al.
patent: 4819777 (1989-04-01), Yasue et al.
patent: 4947734 (1990-08-01), Fujita et al.

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