Air-fuel ratio control system for an automotive engine

Details Air-fuel ratio control system for an automotive engine Air-fuel ratio control system for an automotive engine

1986-11-26

1988-05-31

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, F02M 718

Patent

active

047473851

ABSTRACT:
An air-fuel ratio control system has a system for updating data stored in a table at a steady state of engine operation in accordance with output voltage of an O.sub.2 -sensor. When the output voltage deviates from a reference voltage corresponding to a stoichiometric air-fuel ratio during a predetermined period, the data is rewritten to a fail safe value.

REFERENCES:
patent: 4309971 (1982-01-01), Chiesa
patent: 4348728 (1982-09-01), Sagisaka
patent: 4397279 (1983-08-01), Iida
patent: 4430976 (1984-02-01), Kondo
patent: 4434764 (1984-03-01), Hasegawa
patent: 4582038 (1986-04-01), Canta
patent: 4638658 (1987-01-01), Otobe

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