Air-fuel ratio control apparatus

Details Air-fuel ratio control apparatus Air-fuel ratio control apparatus

1993-02-09

1993-09-28

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123435, 123695, F02D 4114

Patent

active

052479102

ABSTRACT:
A control unit for controlling an injection amount of a fuel injection valve and performing an air-fuel ratio control of an engine has an oxygen sensor for detecting an air-fuel ratio in an exhaust outlet and an electrode plug for measuring a flame resistance value in a combustion chamber. The control unit calculates a reference air-fuel ratio from an average value of the minimum values of the flame resistance measured by the electrode plug, obtains a correction coefficient from the air-fuel ratio detected by the oxygen sensor and the reference air-fuel ratio, and then corrects the air-fuel ratio detected by the oxygen sensor. The control unit performs the air-fuel ratio control of the engine based on the corrected air-fuel ratio.

REFERENCES:
patent: 4177787 (1979-12-01), Hattori et al.
patent: 4214563 (1980-07-01), Hosaka
patent: 4519366 (1985-05-01), May
patent: 4624232 (1986-11-01), Saito et al.
patent: 4930478 (1990-06-01), Plee et al.
patent: 4938194 (1990-07-01), Kato et al.
patent: 5058552 (1991-10-01), Shimomura et al.
patent: 5065728 (1991-11-01), Nakaniwa

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