Method and apparatus for controlling air-fuel ratio in internal

Details Method and apparatus for controlling air-fuel ratio in internal Method and apparatus for controlling air-fuel ratio in internal

1985-05-07

1988-01-19

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123492, 123494, F02B 300

Patent

active

047198885

ABSTRACT:
In an internal combustion engine, when the opening of a throttle valve is smaller than a relatively small definite value, the feedback of the air-fuel ratio of the engine is controlled so that the air-fuel ratio is brought close to a first target air-fuel ratio. When the opening of the throttle valve is equal to or larger than a relatively small definite value and is smaller than a relatively large definite value, the feedback of the air-fuel ratio of the engine is controlled so that the air-fuel ratio is brought close to a second target air-fuel ratio on the rich side with respect to the first target air-fuel ratio. Further, when the opening of the throttle valve is equal to or larger than the relatively large definite value, the air-fuel ratio of the engine is controlled to be a power fuel increment air-fuel ratio.

REFERENCES:
patent: 4385608 (1983-05-01), Ohgami
patent: 4480606 (1984-11-01), Kato

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