Air/fuel ratio control system for internal combustion engine hav

Details Air/fuel ratio control system for internal combustion engine hav Air/fuel ratio control system for internal combustion engine hav

1976-12-22

1979-08-07

Jordan, Charles T.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123 32EE, F02B 300

Patent

active

041634330

ABSTRACT:
In a feedback control system for maintaining the air/fuel ratio of a combustible mixture fed to an internal combustion engine at a preset ratio based on the output of an exhaust sensor, a control signal producing circuit having a proportional amplifier and/or an integrator is constructed so as to vary the proportionality constant or the time constant for the integration in dependence on the temperature and flow velocity of the exhaust gas, with a purpose of avoiding an error in the control attributable to a variation in the output characteristic of the exhaust sensor with variations in the condition of the exhaust gas by superficially shifting the aim of the control from the preset ratio to a provisional ratio.

REFERENCES:
patent: 3782347 (1974-01-01), Schmidt et al.
patent: 3874171 (1975-04-01), Schmidt et al.
patent: 4029L061 (1977-06-01), Asano

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