Air-fuel ratio control system for internal combustion engines

Details Air-fuel ratio control system for internal combustion engines Air-fuel ratio control system for internal combustion engines

1987-09-28

1988-06-28

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123489, 204425, F02D 4114

Patent

active

047532041

ABSTRACT:
An air-fuel ratio control system for internal combustion engines has an air-fuel ratio sensor mounted in an exhaust pipe of an internal combustion engine and is adapted to produce an output indicative of the air-fuel ratio of a mixture supplied to the engine, on the basis of the composition of exhaust gases in the exhaust pipe. The air-fuel ratio sensor is provided with an electric heater for heating the air-fuel ratio sensor. The system further has a temperature sensor for sensing the temperature of the internal combustion engine or the ambient air temperature, and an engine operation sensor adapted to sense whether the engine has been stopped, through detection of the state of the ignition switch. When the engine operation sensor has sensed that the internal combustion engine has been stopped while the temperature sensed by the temperature sensor is below a predetermined level, the electric heater is supplied with power for a predetermined time after the stop of the engine so as to evaporate any water content clinging to the air-fuel ratio sensor.

REFERENCES:
patent: 4332225 (1982-06-01), Cox et al.
patent: 4464244 (1984-08-01), Uchida et al.
patent: 4500412 (1985-02-01), Takahashi et al.
patent: 4541899 (1985-09-01), Mase et al.
patent: 4594987 (1986-06-01), Wataya et al.
patent: 4611562 (1986-09-01), Nakano et al.
patent: 4639305 (1987-01-01), Shibata et al.
patent: 4650560 (1987-03-01), Ueno
patent: 4683539 (1987-07-01), Kanno et al.
patent: 4694806 (1987-09-01), Wataya et al.
patent: 4706634 (1987-11-01), Nishikawa et al.
patent: 4715343 (1987-12-01), Kinoshita

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