Fuel injection pumping apparatus

Details Fuel injection pumping apparatus Fuel injection pumping apparatus

1991-09-16

1993-03-30

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123462, 417462, 417251, F02M 3902, F04B 300

Patent

active

051974410

ABSTRACT:
A fuel pumping apparatus for supplying fuel to an internal combustion engine has an injection pump supplied with fuel by a low pressure feed pump through an adjustable throttle. A fluid pressure operable piston is movable against the action of a spring to control the timing of delivery of fuel by the injection pump. Fuel under pressure is applied to the piston through a first fixed orifice from the feed pump. A second fixed orifice and a variable orifice are connected in series between a drain and the downstream side of the first fixed orifice. In parallel with the first fixed orifice is a constant pressure drop valve which maintains the pressure drops across the first fixed orifice substantially constant when the pressure drop has risen to a predetermined value.

REFERENCES:
patent: 4050433 (1977-09-01), Tokashiki
patent: 4080109 (1978-03-01), Green
patent: 4138981 (1979-02-01), Green
patent: 4359994 (1982-11-01), Hofer
patent: 4393846 (1983-07-01), Mowbray
patent: 4475521 (1984-10-01), Greiner
patent: 4619238 (1986-10-01), Hain
patent: 4733645 (1988-03-01), Hain
patent: 4796592 (1989-01-01), Hofer

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