Failure diagnosis device for an automotive engine

Details Failure diagnosis device for an automotive engine Failure diagnosis device for an automotive engine

1991-04-15

1993-09-14

Williams, Hezron E.

Measuring and testing

Vehicle chassis

Steering

73116, G01M 1500

Patent

active

052438520

ABSTRACT:
The control unit 2 of an automobile includes: a ROM 2b for storing predetermined values representing normal (i.e., warmed-up) operating states of the engine, and a RAM 2c for storing cumulative values of outputs of various sensors. The cumulative values are continually compared with the predetermined values, and failure diagnosis of the engine is effected only when the cumulative values exceed the predetermined values.

REFERENCES:
patent: 4825373 (1989-04-01), Nakamura et al.
patent: 4829440 (1989-05-01), Abe
patent: 4970492 (1990-11-01), King
patent: 4975847 (1990-12-01), Abe et al.
patent: 4989150 (1991-01-01), Tazawa
patent: 5062294 (1991-11-01), Iwata

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