Combustion state detecting apparatus for an internal-combustion

Details Combustion state detecting apparatus for an internal-combustion Combustion state detecting apparatus for an internal-combustion

1997-07-09

1998-07-28

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

F02P 514

Patent

active

057850208

ABSTRACT:
A combustion state detecting apparatus for an internal-combustion engine permits an improved signal-to-noise ratio of a knocking signal with a resultant improved controllability without adding to the load on an electronic control unit (ECU). The combustion state detecting apparatus is equipped with: a knocking signal processing circuit 20 which generates a knocking signal (K) according to an ionic current detection signal (Ei); and an ECU (2A) which detects the combustion state at a spark plug according to the ionic current detection signal and the knocking signal.

REFERENCES:
patent: 5263452 (1993-11-01), Ohsawa et al.
patent: 5425339 (1995-06-01), Fukui
patent: 5676113 (1997-10-01), Johansson et al.
patent: 5692474 (1997-12-01), Yamauchi et al.
patent: 5694900 (1997-12-01), Morita et al.

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