Fuel pumping apparatus

Details Fuel pumping apparatus Fuel pumping apparatus

1990-11-15

1991-07-30

Smith, Leonard E.

Pumps

Expansible chamber type

Moving cylinder

417440, 123447, 123450, 123506, F04B 2900, F04B 2300, F02M 3704

Patent

active

050355872

ABSTRACT:
A fuel pumping apparatus has a pumping plunger operable by a cam to deliver fuel to an outlet. A spill valve is provided which when open permits fuel to spill from the bore in which the pumping plunger is located. An actuating piston is located in a first cylinder and is coupled to the spill valve and a storage piston is located in a second cylinder connected to the first cylinder. A control valve controls the pressure in the first cylinder and when the pressure is raised the actuating piston lifts the spill valve from the seating and the fuel from the bore can flow into the first cylinder and when the actuating piston is displaced therefrom, into the second cylinder.

REFERENCES:
patent: 4224903 (1980-09-01), Mowbray
patent: 4489697 (1984-12-01), Kawatei
patent: 4530337 (1985-07-01), Laufer
patent: 4932844 (1990-06-01), Glanvall
patent: 4936755 (1990-06-01), Greeves et al.

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