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

1985-05-03

1987-03-10

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123325, 123326, 123440, F02M 5100, F02D 906

Patent

active

046483705

ABSTRACT:
In an internal combustion engine wherein feedback control of the air-fuel ratio is carried out in accordance with the concentration of a specific composition in the exhaust gas, so that the air-fuel ratio is close to an predetermined target air-fuel ratio on the lean side with respect to the stoichiometric air-fuel ratio, the rate of fuel cut-off for a definite time period is calculated. When the rate of fuel cut-off is larger than a predetermined value, the air-fuel feedback control is stopped.

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