Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1989-06-19
1990-09-25
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
123493, F02D 4114
Patent
active
049586122
ABSTRACT:
An air-fuel ratio control method for an internal combustion engine having an exhaust gas-ingredient concentration sensor provided in an exhaust system and generating an output proportional to the concentration of an ingredient in exhaust gases emitted from the engine. The air-fuel ratio of a mixture supplied to the engine is controlled to a desired air-fuel ratio corresponding to an operating condition in which the engine is operating, in a feedback manner responsive to the output of the sensor. Supply of fuel to the engine is interrupted while the engine is in a predetermined decelerating condition. The method comprises the steps of progressively decreasing the desired air-fuel ratio from a value larger than a value corresponding to the operating condition of the engine to the latter value after the engine leaves the predetermined decelerating condition, and controlling the air-fuel ratio of the mixture supplied to the engine to the progressively decreased air-fuel ratio in the feedback manner.
REFERENCES:
patent: 4174682 (1979-11-01), Drews et al.
patent: 4697559 (1987-10-01), Suzuki et al.
patent: 4697567 (1987-10-01), Sawada et al.
Kato Akira
Yano Toru
Argenbright Tony M.
Honda Giken Kogyo K.K.
Lessler Arthur L.
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