Apparatus for controlling air-fuel ratio using air-fuel ratio se

Details Apparatus for controlling air-fuel ratio using air-fuel ratio se Apparatus for controlling air-fuel ratio using air-fuel ratio se

1990-11-05

1992-04-07

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

F01N 228

Patent

active

051016257

ABSTRACT:
In an apparatus for controlling an air-fuel ratio in an internal combustion engine, a main air-fuel ratio sensor having an element temperature strongly affected by the temperature thereof, a sub air-fuel ration sensor having an element temperature weakly affected by the temperature thereof, and a heater associated with the main air-fuel ratio sensor are provided. The resistance value or electric power of the heater is controlled in accordance with the output of the sub air-fuel ratio sensor.

REFERENCES:
patent: 4130095 (1978-12-01), Bowler
patent: 4228128 (1980-10-01), Esper
patent: 4622809 (1986-11-01), Abthoff
patent: 4708777 (1987-11-01), Kuraoka

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