Air-fuel ratio control unit for engine

Details Air-fuel ratio control unit for engine Air-fuel ratio control unit for engine

1991-06-19

1994-06-07

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123479, 60276, F02M 5100

Patent

active

053180038

ABSTRACT:
An engine air-fuel ratio control unit is so constructed that, whenever any abnormal operation is detected in one of O.sub.2 sensors, the control unit makes corrections of a fuel amount injected from an injector on the basis of the output information from the other O.sub.2 sensor performing its normal operation and learned values obtained from both of the O.sub.2 sensors when both performed their normal operations.

REFERENCES:
patent: 4121548 (1978-10-01), Hattori et al.
patent: 4134261 (1979-01-01), Iizuka et al.
patent: 4864998 (1989-09-01), Onishi
patent: 4869223 (1989-09-01), Shimomura et al.
patent: 4999781 (1991-03-01), Holl et al.
patent: 5001643 (1991-03-01), Domino et al.
patent: 5099817 (1992-03-01), Nakaniwa
patent: 5131372 (1992-07-01), Nakaniwa
patent: 5158062 (1992-10-01), Chen

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