Internal-combustion engines – Charge forming device – Having fluidic logic control means
Patent
1985-03-11
1987-10-06
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Having fluidic logic control means
123489, F02D 4114, F02M 714
Patent
active
046975640
ABSTRACT:
An air-fuel ratio control system for a carburetor of an internal combustion engine comprises an O.sub.2 -sensor for detecting the concentration of the oxygen constituent of exhaust gases passing through an exhaust passage, an on-off electromagnetic valve for correcting the air-fuel ratio of the air-fuel mixture supplied by the carburetor, an electronic control circuit comprising a comparator for comparing an output signal of the O.sub.2 -sensor, an integration circuit, and a driving circuit for producing driving pulses for driving the electromagnetic valve in dependency on an output signal of the integration circuit for controlling the air-fuel ratio. A detector, such as an ignition pulse generating device, is provided for detecting conditions of operation of the internal combustion engine and for producing an engine operation signal, and a current control circuit responds to the engine operation signal for producing an output current. A delay circuit is provided to respond to the output current for delaying the output signal of the integration circuit.
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Kubota Masaharu
Ohgami Masaaki
Yasuda Hiroki
Argenbright Tony M.
Farber Martin A.
Fuji Jukogyo Kabushiki Kaisha
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