Internal-combustion engines – Charge forming device – Having fluidic logic control means
Patent
1980-08-01
1983-07-19
Myhre, Charles J.
Internal-combustion engines
Charge forming device
Having fluidic logic control means
60276, F02M 712
Patent
active
043938396
ABSTRACT:
A method and system for controlling the air-fuel ratio for a carburetor for an internal combustion engine having an intake passage, an exhaust passage, a throttle valve, a detector for detecting the concentration of a constituent of the exhaust gases, an on-off type electro-magnetic valve for correcting the air-fuel ratio of the air-fuel mixture supplied by an air-fuel mixture supplier and an electronic controller. The electronic controller comprises a comparing circuit for comparing the output signal of the detector with a stoichiometric reference signal, for driving the on-off electro-magnetic valve for controlling the air-fuel ratio to a value approximating the stoichiometric air-fuel ratio. A switch connects a constant signal generating circuit to the electronic controller and renders the electronic control means non-responsive to the detector when a vacuum sensor actuates the switch during a rapid deceleration, whereby the on-off electro-magnetic valve operates by the constant signal from the constant signal generating circuit at a predetermined duty ratio to prevent an excessive enrichment of the mixture caused by misfiring.
REFERENCES:
patent: 3916170 (1975-10-01), Norimatsu et al.
patent: 4089313 (1978-05-01), Asano et al.
patent: 4119072 (1978-10-01), Asano
patent: 4132199 (1979-01-01), Kuroiwa et al.
patent: 4143623 (1979-03-01), Norimatsu et al.
patent: 4285319 (1981-08-01), Hattori et al.
Dolinar Andrew M.
Farber Martin A.
Fuji Jukogyo Kabushiki Kaisha
Myhre Charles J.
Nissan Motor Co,. Ltd.
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