Internal-combustion engines – Charge forming device – Having fluidic logic control means
Patent
1983-11-09
1984-12-25
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Having fluidic logic control means
F02M 700
Patent
active
044896930
ABSTRACT:
A system for controlling the air-fuel ratio of an air-fuel mixture for an internal combustion engine having a two-barrel carburetor. The system is provided with an O.sub.2 sensor for detecting the concentration of oxygen in the exhaust gases, an on-off electromagnetic valve for correcting the air-fuel ratio of the air-fuel mixture supplied by the carburetor and an electronic control circuit. The electronic control circuit operates to compare output signals of the detector with a stoichiometric value, and to produce driving pulses for driving the on-off electromagnetic valve and for controlling the air-fuel ratio to a value approximately equal to the stoichiometric air-fuel ratio. A fixed signal generating circuit is selectively connected to the electronic control circuit. The two-barrel carburetor has an actuator actuated by the vacuum at the venturi of the carburetor for opening a throttle valve of the secondary side of the carburetor. A first vacuum switch is provided to be operated in response to the vacuum in the intake passage and a second vacuum switch is provided to be operated by the vacuum in the secondary side of the carburetor. When one of vacuum switches is operated, the fixed signal generating circuit is connected to the electronic control circuit for providing a fixed duty ratio for the valve and renders the electronic control circuit non-responsive to the output of the O.sub.2 sensor.
REFERENCES:
patent: 4103657 (1978-08-01), Minami
patent: 4132199 (1979-01-01), Kuroiwa et al.
patent: 4202295 (1980-05-01), Kondo et al.
patent: 4364358 (1982-12-01), Shikata et al.
patent: 4385608 (1983-05-01), Ohgami et al.
patent: 4398517 (1983-08-01), Kubota et al.
Argenbright Tony M.
Farber Martin A.
Fuji Jukogyo Kabushiki Kaisha
LandOfFree
Air-fuel ratio control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Air-fuel ratio control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air-fuel ratio control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1147847