Feedback control system for internal combustion engine
First Claim
1. A control system for an internal combustion engine, comprising:
- first means for issuing a signal representative of combustion pressure in a combustion chamber of said engine;
second means for issuing a signal representative of existing combustion timing of said combustion chamber by processing said signal from said first means for detection of rapid increase of the combustion pressure;
a reference timing circuit for issuing a signal representative of a predetermined reference combustion timing of said combustion chamber in accordance with operation modes of said engine;
a comparator circuit for issuing a signal representative of a difference between the signal from said second means and the signal from said reference timing circuit; and
third means for controlling at least one of engine operating parameters consisting of the ignition timing, the air-fuel ratio of air-fuel mixture fed to said engine and the amount of exhaust gas recirculated into an intake system of said engine, by processing the signal from said comparator circuit.
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Abstract
A control system for an internal combustion engine comprises a transducer for issuing a signal representative of combustion pressure in a combustion chamber, a unit consisting of a bandpass filter and a wave-form shaping circuit for issuing a signal representative of existing combustion timing of the combustion chamber by processing the signal from the transducer for detection of rapid increase of the combustion pressure; a reference timing circuit for issuing a signal representative of a predetermined reference combustion timing of the combustion chamber in accordance with operation modes of the engine, a comparator circuit for issuing a signal representative of a difference between the signal from the unit and the signal from the reference timing circuit, and a unit consisting of a discriminating circuit and an actuator driving circuit for controlling the ignition timing, the air-fuel ratio of air-fuel mixture and the amount of exhaust gas recirculated into the intake system of the engine, by processing the signal from the comparator circuit.
42 Citations
6 Claims
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1. A control system for an internal combustion engine, comprising:
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first means for issuing a signal representative of combustion pressure in a combustion chamber of said engine; second means for issuing a signal representative of existing combustion timing of said combustion chamber by processing said signal from said first means for detection of rapid increase of the combustion pressure; a reference timing circuit for issuing a signal representative of a predetermined reference combustion timing of said combustion chamber in accordance with operation modes of said engine; a comparator circuit for issuing a signal representative of a difference between the signal from said second means and the signal from said reference timing circuit; and third means for controlling at least one of engine operating parameters consisting of the ignition timing, the air-fuel ratio of air-fuel mixture fed to said engine and the amount of exhaust gas recirculated into an intake system of said engine, by processing the signal from said comparator circuit. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification