Liquid fuel injection pumps

Details Liquid fuel injection pumps Liquid fuel injection pumps

1978-02-07

1980-02-05

Smith, Leonard E.

Pumps

Expansible chamber type

Pumping member position controlled port

123139AA, F04B 704, F02M 5944

Patent

active

041870603

ABSTRACT:
A fuel injection pump includes a pumping plunger which is slidably mounted within a cylinder formed in a barrel. The barrel is provided with a pair of opposed ports which are covered by the plunger during its inward movement. The aforesaid ports permit fuel to flow into the pumping chamber when the plunger moves outwardly. Cavities can form in the fuel in the aforesaid ports prior to closure of the ports by the plunger and such cavities when they collapse can cause damage to the working surfaces of the plunger and cylinder. Channel means is provided to allow fuel to flow from the pumping chamber into at least one port to displace the cavities therefrom during the pumping stroke of the plunger.

REFERENCES:
patent: 3477386 (1969-11-01), Staudt

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