Faulty lifter oil manifold assembly solenoid diagnostic system

Details Faulty lifter oil manifold assembly solenoid diagnostic system Faulty lifter oil manifold assembly solenoid diagnostic system

2008-04-15

2008-04-15

Cronin, Stephen K. (Department: 3747)

Measuring and testing

Vehicle chassis

Steering

C123S19800E, C123S090100, C701S029000

Reexamination Certificate

active

07357019

ABSTRACT:
A diagnostic system that detects a faulty lifter oil manifold assembly solenoid includes a current measurement module, a time delay module, a voltage measurement module, and a diagnostic module. The current measurement module measures current flowing through the solenoid when a trigger signal is enabled. The time delay module determines a time delay based on the measured current. The voltage measurement module measures a supply voltage that powers the solenoid. The diagnostic module determines whether the solenoid is faulty based on the time delay and supply voltage.

REFERENCES:
patent: 6307376 (2001-10-01), Alexander et al.
patent: 6752121 (2004-06-01), Rayl et al.
patent: 7302921 (2007-12-01), McDonald et al.

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