Program execution malfunction detecting method for an automobile

Details Program execution malfunction detecting method for an automobile Program execution malfunction detecting method for an automobile

1990-05-31

1992-06-02

Baker, Stephen M.

Excavating

36443111, G05B 2302

Patent

active

051193817

ABSTRACT:
A method for detecting malfunctioning of a digital computer of a control device which repetitively processes a main routine and, at each predetermined timing, interrupts the processing of the main routine in order to process at least one interruption routine. The method includes the steps of (a) changing the contents of a first stored data after a predetermined plurality of consecutive interrupt routines are executed, (b) setting a second stored data equal to the first stored data in processing the main routine, (c) outputting the second stored data as a signal from the digital operating circuit in processing the interruption routine, and (d) identifying a malfunction by detecting whether the contents of the second stored data outputted from the circuit remain constant for a time longer than a second predetermined time.

REFERENCES:
patent: 4310889 (1982-01-01), Imai et al.
patent: 4410938 (1983-10-01), Higashiyama
patent: 4527248 (1985-07-01), Takase et al.

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