Method and apparatus for controlling heater for heating air-fuel

Details Method and apparatus for controlling heater for heating air-fuel Method and apparatus for controlling heater for heating air-fuel

1986-09-16

1987-12-29

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, 204425, F02D 4114

Patent

active

047153431

ABSTRACT:
In an internal combustion engine, a heater for heating an air-fuel ratio sensor provided in the exhaust gas flow passage is controlled in accordance with a parameter of a driving condition of the engine. That is the heater for the air-fuel ratio sensor is turned ON when the parameter is not larger than a predetermined value, and the heater for the air-fuel ratio sensor is turned OFF when the parameter is larger than the predetermined value. The turning ON or turning OFF of the heater is delayed with a predetermined delay time. Thus the number of times that the heater is turned ON and OFF is decreased, thereby prolonging the life of the heater.

REFERENCES:
patent: 4182300 (1980-01-01), Ono et al.
patent: 4354468 (1982-10-01), Sone et al.
patent: 4365604 (1982-12-01), Sone

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