Open loop electronic circuit for altitude compensation

Details Open loop electronic circuit for altitude compensation Open loop electronic circuit for altitude compensation

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.

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