Internal-combustion engines – Charge forming device – Auxiliary control of carburetor fuel metering
Patent
1983-03-28
1984-07-03
Cuchlinski, Jr., William A.
Internal-combustion engines
Charge forming device
Auxiliary control of carburetor fuel metering
123432, 261 26, 261 34B, 261DIG74, F02M 708
Patent
active
044572786
ABSTRACT:
A fuel supply system for a mixture-compressing internal combustion engine employs a controllable differential pressure for the removal of air from a main air duct into a carrier air duct for proportioning the fuel to be used. The fuel system includes a fuel proportioning device and a vane pump for withdrawing a carrier air flow from the main air duct and for transporting the fuel through feed lines to the internal combustion engine. The pressure of the air at the fuel outlet and the differential pressure for fuel proportioning is controlled by a differential pressure valve located in the carrier air duct spaced from the main air duct. The differential pressure valve has a diaphragm dividing the interior of the valve into chambers with one side of the diaphragm acted upon by the air pressure in the carrier duct between the differential pressure valve and the main air duct. The other side of the diaphragm is acted upon by the pressure in the carrier air duct downstream from the differential pressure valve and also by a variable force depending on the parameters of the engine. To prevent pulsations in the air flow from disadvantageously affecting the differential pressure valve, the diaphragm in the valve is separated by a partition from a space in which such pulsations are effective. The air pressure in the carrier air duct upstream from the differential pressure valve acts in the space and the partition has a nozzle for admitting the air pressure to the one side of the diaphragm.
REFERENCES:
patent: 4088102 (1978-05-01), Kato
patent: 4271801 (1981-06-01), Yamakawa et al.
patent: 4271803 (1981-06-01), Nakanishi et al.
patent: 4303048 (1981-12-01), Nishio
patent: 4361123 (1982-11-01), Hori et al.
patent: 4364354 (1982-12-01), Kosuge et al.
Habel Georg
Heidemanns Rolf-Peter
Muller Hans-Jurgen
Cuchlinski Jr. William A.
Pierburg GmbH & Co. KG
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