Internal-combustion engines – Charge forming device – Auxiliary control of carburetor fuel metering
Patent
1981-06-26
1983-04-05
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Auxiliary control of carburetor fuel metering
F02M 712
Patent
active
043787720
ABSTRACT:
An open loop electronics circuit (1) for altitude compensation of a carburetor (C) installed on an internal combustion automobile engine (E). The carburetor has an associated solenoid (S) controlling auxiliary air bled into fuel circuits of the carburetor thereby to control the air-fuel ratio of the mixture produced by the carburetor. A bridge (7) continuously senses the density of air which varies as a function of altitude and generates an electrical signal Es the amplitude of which changes in response to changes in air density. A converter (13) is responsive to the electrical signal for generating a variable pulse width control signal Cs supplied to the solenoid. The converter (13) varys the pulse width of the control signal in response to amplitude changes in the electrical signal generated by the bridge circuit whereby the air-fuel ratio of the mixture produced by the carburetor is varied as a function of changes in air density.
REFERENCES:
patent: 3861366 (1975-01-01), Masaki et al.
patent: 3912796 (1975-10-01), Brown
patent: 4187814 (1980-02-01), Phelan et al.
patent: 4282840 (1981-08-01), Yamada et al.
patent: 4307696 (1981-12-01), Noji et al.
ACF Industries Inc.
Argenbright Tony M.
Muller J. Joseph
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