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

1986-05-20

Lall, Parshotam S.

Boots, shoes, and leggings

123479, F02D 3500

Patent

active

045905665

ABSTRACT:
A system for diagnosing an internal combustion engine having a starter and a starter operation switch. The system comprises a starter operation diagnosing circuit responsive to output voltage of the starter operation switch for producing an output when the output voltage deflects from a predetermined value, an engine speed detecting circuit for detecting an engine speed at cranking of the engine, a first gate responsive to the output voltage of the detecting circuit for producing an output for a predetermined time. A second gate is responsive to the output of the first gate to pass the output of the starter operation diagnosing circuit, and a warning lamp is operated by a signal passing through the second gate.

REFERENCES:
patent: 4325251 (1982-04-01), Kanegae
patent: 4393842 (1983-07-01), Otsuka et al.
patent: 4395905 (1983-08-01), Fujimori et al.
patent: 4430979 (1984-02-01), Shikata
patent: 4502446 (1985-03-01), Kanegae et al.

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