Internal-combustion engines – Charge forming device – Auxiliary air or oxygen added to combustible mixture
Patent
1980-02-12
1981-12-29
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Auxiliary air or oxygen added to combustible mixture
123465, 123588, F02B 300
Patent
active
043076963
ABSTRACT:
An electronic control system which electronically controls the air fuel ratio of a mixture being supplied to a gasoline engine in highlands. An orifice device is provided in a passage through which secondary air is supplied to the venturi section of the engine carburetor. An electronic control unit carries out programmed control of the orifice opening of the orifice device in response to the atmospheric pressure and the engine temperature to create a reference pressure. A further electronic control unit drives a second air control valve provided in the secondary air supply passage along a predetermined operating characteristic pattern in response to the difference between the reference pressure and an actual pressure present in the venturi section of the carburetor. A mixture having an optimum air fuel ratio corresponding to the atmospheric pressure can thus be supplied to the engine from the carburetor.
REFERENCES:
patent: 3738343 (1973-06-01), Zeyns
patent: 4125100 (1978-11-01), Assenheimer
patent: 4163434 (1979-08-01), Tsukamoto
patent: 4187821 (1980-02-01), Zebli
Kimura Jun-ichi
Noji Akio
Cox Ronald B.
Honda Giken Kogyo Kabushiki Kaisha
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