Internal-combustion engines – Charge forming device – Fuel flow regulation between the pump and the charge-forming...
Patent
1990-12-13
1992-07-28
Miller, Carl Stuart
Internal-combustion engines
Charge forming device
Fuel flow regulation between the pump and the charge-forming...
137846, 417 79, 123510, F04F 500
Patent
active
051333244
ABSTRACT:
In an ejector pump provided within a saddle-shaped fuel tank for an automotive vehicle to feed fuel from a subchamber to a main chamber through a suction pipe due to a vacuum generated by fuel returned from an engine to the fuel tank via a return pipe, the ejector pump comprises a return pipe connecting portion connected to the return pipe; a suction pipe connecting portion connected to the suction pipe; a nozzle formed at an end of the return pipe connecting portion; a pump housing coupled to the two pipe connecting portions, for forming a vacuum chamber and a throat portion; and in particular elastic reverse-conical shaped check valve provided within the return pipe connecting portion to prevent fuel from flowing reversely from the fuel tank in case of trouble. Further, since the check valve can be used in common with a sealing member and further with the nozzle, it is possible to simplify the ejector pump structure and assembly work without reducing the fuel tank capacity.
REFERENCES:
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patent: 4702215 (1987-10-01), Lebold
patent: 4834132 (1989-05-01), Sasaki
Miller Carl Stuart
Nissan Motor Co,. Ltd.
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