System for diagnosing an internal combustion engine

Details System for diagnosing an internal combustion engine System for diagnosing an internal combustion engine

1983-09-26

1986-05-06

Lall, Parshotam S.

Boots, shoes, and leggings

36443101, 123479, F02D 500, G06F 1130

Patent

active

045876150

ABSTRACT:
A system for diagnosing an internal combustion engine having engine operation sensing devices. A diagnosing circuit is provided to response to output voltages of the sensing devices for producing a first signal when the voltage exceeds a predetermined range and a second signal with a delay after the first signal. A fail-safe signal generating circuit is provided to produce one of fail-safe signals in dependency on the first signal so as to prevent the stall of the engine.
The second signal operated to indicate trouble in the engine operation sensing devices after the fail-safe operation.

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patent: 4246566 (1981-01-01), Endo et al.
patent: 4287503 (1981-09-01), Sumida
patent: 4370962 (1983-02-01), Hosaka
patent: 4378771 (1983-04-01), Sawada et al.
patent: 4386427 (1983-05-01), Hosaka
patent: 4414949 (1983-11-01), Honig et al.
patent: 4450815 (1984-05-01), Mouri

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