Air-fuel ratio control system

Details Air-fuel ratio control system Air-fuel ratio control system

1985-04-12

1986-12-16

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123491, 123492, 123493, F02M 5100, F02D 4104, F02D 4114

Patent

active

046288830

ABSTRACT:
A feedback air-fuel ratio control system for an internal combustion engine has an O.sub.2 -sensor for detecting the concentration of oxygen in exhaust gases of the engine, a coolant temperature sensor, and a circuit for disabling the feedback control operation at a low coolant temperature during warming-up of the engine. The feedback control system is also disabled when the engine is rapidly accelerated or decelerated, even if the engine is warming-up at coolant temperatures greater than the low coolant temperature state.

REFERENCES:
patent: 4365603 (1982-12-01), Shikata et al.
patent: 4388905 (1983-06-01), Kurihara
patent: 4408588 (1983-10-01), Mausner
patent: 4469074 (1984-09-01), Takao et al.
patent: 4488529 (1984-12-01), Nishida et al.
patent: 4492204 (1985-01-01), Bertsch et al.

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