Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1978-06-19
1980-04-29
Cox, Ronald B.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123139E, 123 32AE, F02B 300, F02M 3900
Patent
active
042000734
ABSTRACT:
An electronic throttle body fuel injection system in which a fuel pump delivers fuel at constant flow and pressure to a jet in a pressure controlled chamber which is continuously ported upstream of the jet discharge to a fuel nozzle in a throttle bore and is periodically ported to bypass back to the pump fuel supply by an electrically operated on-off valve. The valve has an atmospheric reference pressure bias and is operable with a fuel demand signal from a conventional electronic fuel injection control system to open and close for time periods which vary with the fuel signal to vary the pressure in the controlled chamber between a value which induces fuel flow through the fuel nozzle for such time periods and a value which does not to thereby effect a metered flow to the fuel nozzle according to the fuel demand signal to provide the desired air/fuel ratio for optimum engine running conditions.
REFERENCES:
patent: 3510112 (1970-05-01), Winquist
patent: 3720403 (1973-03-01), Winquist
patent: 3911884 (1975-10-01), Moriya
patent: 3943904 (1976-03-01), Byrne
patent: 4132203 (1979-01-01), Elpern
Cox Ronald B.
General Motors Corporation
Phillips Ronald L.
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