Air/fuel ratio control system having function of controlling sup

Details Air/fuel ratio control system having function of controlling sup Air/fuel ratio control system having function of controlling sup

1981-08-20

1983-10-04

Cox, Ronald B.

Internal-combustion engines

Starting device

For airplane

123440, 123585, 123587, 123327, F02B 300, F02B 3300

Patent

active

044072430

ABSTRACT:
An air/fuel ratio control system for performing feedback control of the air/fuel ratio of an air/fuel mixture being supplied to an internal combustion engine in response to the concentration of an exhaust gas ingredient. The air/fuel ratio control system includes a device for controlling a shot air valve for supplying secondary air into the intake pipe of the engine. The control device is connected to a solenoid valve for controlling the shot air valve and operable to open the solenoid valve to hold the shot air valve inoperative for a predetermined period of time after the engine rpm has increased across a predetermined value which is higher than the engine cranking rpm but lower than the engine idling rpm, to thereby prevent misfire within engine cylinders at the start of the engine.

REFERENCES:
patent: 3866588 (1975-02-01), Nakada
patent: 4194477 (1980-03-01), Sugiyami
patent: 4250707 (1981-02-01), Cavallino
patent: 4279230 (1981-07-01), Bauer
patent: 4300501 (1981-11-01), Suzuki

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