Air-fuel ratio feedback control apparatus of an internal combust

Details Air-fuel ratio feedback control apparatus of an internal combust Air-fuel ratio feedback control apparatus of an internal combust

1978-12-04

1981-02-10

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Auxiliary control of carburetor fuel metering

123440, 123439, F02B 300

Patent

active

042494966

ABSTRACT:
An air-fuel ratio feedback control apparatus of an internal combustion engine in which an air-fuel ratio of an air-fuel mixture is at first set on the lean side of the desired air-fuel ratio. Additional fuel is supplied from at least one fuel injection valve. The amount of injected fuel each time the injecting operation is carried out is increased or decreased by a certain quantity in accordance with an air-fuel ratio condition signal detected by an air-fuel ratio sensor. Only when the air-fuel ratio feedback, control operation is initiated, then is a large amount of fuel abruptly supplied to the engine by an auxiliary fuel control means. Thereafter, the normal injecting operation is carried out together with the operation for increasing or decreasing the amount of injected fuel by a certain quantity.

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