Piston type liquid fuel pump with an improved inlet valve

Details Piston type liquid fuel pump with an improved inlet valve Piston type liquid fuel pump with an improved inlet valve

1996-12-13

1998-11-17

Thorpe, Timothy

Pumps

Three or more cylinders arranged in parallel, radial, or...

417552, 92181P, 123452, F04B 114

Patent

active

058367497

ABSTRACT:
A fuel injection system for injecting gasoline or other fuel directly into the combustion chambers of an internal combustion engine including a fuel pump with a plurality of fuel pumping pistons mounted within cylinders formed in a fixed barrel member. Each of the pistons internally contains an improved inlet valving assembly mounted wholly within a bore axially extending in the piston. The valving assembly provides a one-way fluid inletting to the pumping chamber by slight movement of a low mass valving member away from an annular seating surface formed about an inlet passage. Unlike rotary sliding type valves, the subject valve does not move rapidly through and agitate fuel and thereby does not generate any significant degree of undesirable fuel heating thus preventing undesirable fuel vaporization which is detrimental to pumping action of fluid.

REFERENCES:
patent: Re25850 (1965-09-01), Stewart
patent: 2941475 (1960-06-01), Blair
patent: 2945444 (1960-07-01), Leissner
patent: 3009423 (1961-11-01), Leissner
patent: 3221564 (1965-12-01), Raymond
patent: 3514223 (1970-05-01), Hare
patent: 4757795 (1988-07-01), Kelly
patent: 5466130 (1995-11-01), Kobelt
patent: 5515829 (1996-05-01), Wear et al.

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