Engine control apparatus

Details Engine control apparatus Engine control apparatus

1990-03-21

1991-10-22

Argenbright, Tony M.

Internal-combustion engines

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

123435, F02P 514, F02M 700

Patent

active

050585525

ABSTRACT:
An engine control apparatus is provided with a control unit in which a fuel supply quantity Q.sub.f or a ignition timing .theta..sub.i is corrected to maximize an evaluation parameter A=P.sub.i /(Q.sub.a /N) obtained on the basis of a suction air quantity Q.sub.a, an engine speed N and a mean effective pressure P.sub.i in a engine, or to maximize a parameter B=P.sub.i /P.sub.b obtained on the basis of a suction pipe pressure P.sub.b and the mean effective pressure P.sub.i, or to maximize a maximum pressure P.sub.max or a mean effective pressure P.sub.i for every combustion cycle, so that control is performed on the basis of the result of the above correction. The control unit also performs feedback control of the fuel supply quantity Q.sub.f and corrects the ignition timing. Further, the control unit performs feedback control in a predetermined load-operation range of the engine, and stops the feedback control and corrects the fuel supply quantity Q.sub.f out of said predetermined load-operation range of the engine.

REFERENCES:
patent: 4378777 (1983-04-01), Iida et al.
patent: 4417556 (1983-11-01), Latsch
patent: 4556030 (1985-12-01), Aono
patent: 4646697 (1987-03-01), Grob et al.
patent: 4706628 (1987-11-01), Trombley
patent: 4896642 (1990-01-01), Washino et al.

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