Electronic device for controlling the air/fuel ratio of the mixt

Details Electronic device for controlling the air/fuel ratio of the mixt Electronic device for controlling the air/fuel ratio of the mixt

1998-07-16

2000-02-22

Kwon, John

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123696, F02M 2500

Patent

active

06026795&

ABSTRACT:
Control device in which a linear oxygen sensor arranged on a gas exhaust pipe of an internal-combustion engine upstream of a catalytic converter generates a signal supplied to a conversion circuit generating at its output a measured parameter representing the air/fuel ratio of the mixture supplied to the engine. The measured parameter is compared with a target parameter so as to calculate an error parameter which is used, according to an operating method, to generate, where necessary, a bistable dummy signal variable between a positive saturation value and a negative saturation value so as to model the output of an oxygen sensor of the ON/OFF type. The dummy signal is also processed so as to calculate a correction parameter designed to be used for correction of a theoretical value of a calculated quantity of fuel, obtaining a corrected quantity of fuel for an injection system of the engine.

REFERENCES:
patent: 5435290 (1995-07-01), Gopp et al.
patent: 5473889 (1995-12-01), Ehard et al.
patent: 5692487 (1997-12-01), Schuerz et al.
patent: 5787867 (1998-08-01), Schnaibel et al.
patent: 5836153 (1998-11-01), Staufenberg et al.
patent: 5867983 (1999-02-01), Otani
Patent Abstracts of Japan of JP 63223347 of Sep., 1988.
Patent Abstracts of Japan of JP 63223346 of Sep., 1988.

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