Perfected pumping device for feeding fuel from a tank to an inte

Details Perfected pumping device for feeding fuel from a tank to an inte Perfected pumping device for feeding fuel from a tank to an inte

1997-12-19

2000-10-10

Freay, Charles G.

Pumps

Diverse pumps

Series

417251, 417253, F04B 2312

Patent

active

061295183

ABSTRACT:
An on-off valve is connected between a high-pressure pump and a low-press pump and is sized to be rapidly activated during the cranking stage of an internal combustion engine. After actuating the on-off valve, surplus fuel is drained into an inner chamber of the high pressure pump. A solenoid valve is further provided between the low-pressure pump and the on-off valve to automatically cut off the supply of fuel to the on-off valve in the event of an engine failure. The apparatus is beneficial to reduce variation in the fuel supply of the low pressure pump during engine start-up and steady-state operation.

REFERENCES:
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patent: 5131817 (1992-07-01), Pastore, Jr.
patent: 5378125 (1995-01-01), Frank et al.
patent: 5393203 (1995-02-01), Hantle
patent: 5551842 (1996-09-01), Schmid et al.
patent: 5571243 (1996-11-01), Arnold et al.
patent: 5836421 (1998-11-01), Leicht
patent: 5884597 (1999-03-01), Hiraku et al.

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