Signal processing circuit for engine control system

Details Signal processing circuit for engine control system Signal processing circuit for engine control system

1994-04-28

1996-03-19

Chilcot, Richard

Measuring and testing

Test stand

For engine

G01M 1500

Patent

active

054995345

ABSTRACT:
A signal processing circuit for use in a control system for an internal combustion engine receives a first series of signals from a first transducer driven by the engine crankshaft and a second series of signals from a second transducer. The signals of the first series occur at short intervals of time and those of the second series at relatively long intervals and serve as engine cylinder identification signals. The signals of the second series include a further signal which occurs a predetermined time before one of the identification signals to provide an engine position signal. The processing circuit supplies the cylinder identification signals and the engine position signal separately to a microprocessor based engine control system and it is constructed to supply artificial identification signals and an artificial position signal in the event of failure of the second transducer, the artificial signals being derived from the signals of the first series.

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patent: 5309757 (1994-05-01), Hashimoto et al.
patent: 5333586 (1994-08-01), Fukui

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