Fuel pump with a cam having first and second plunger displacemen

Details Fuel pump with a cam having first and second plunger displacemen Fuel pump with a cam having first and second plunger displacemen

1997-05-20

1999-09-07

Freay, Charles G.

Pumps

Expansible chamber type

Moving cylinder

417440, 123450, 123506, F04B 1902

Patent

active

059477075

ABSTRACT:
A fuel pump is disclosed which comprises a plunger reciprocable under the influence of a cam surface. The cam surface is shaped to include a first region and a second region. As the plunger moves under the influence of the first region, a pressure wave is generated which is able to reach a spill valve prior to the plunger moving under the influence of the second region to generate a pressure sufficient to open a delivery valve.

REFERENCES:
patent: 5035587 (1991-07-01), Collingborn
patent: 5044893 (1991-09-01), Collingborn
patent: 5044899 (1991-09-01), Nicol
patent: 5215449 (1993-06-01), Ilija

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