Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1976-12-13
1978-07-18
Myhre, Charles J.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123139AS, 417214, 417273, F02M 3900
Patent
active
041009037
ABSTRACT:
The disclosed liquid fuel injection pump is suited for the delivery of measured charges of liquid fuel under high pressure sequentially to the cylinders of an associated engine and includes a free piston type plunger reciprocably mounted in a pump chamber, wherein the charges are pressurized to high pressure, a stop for the pump plunger to limit the maximum volume of the chamber, a hub mounting a plurality of rollers to engage the camming surface of a tappet interposed between the plungers and the rollers to drive the pump plungers in a direction to reduce the volume of the pump chamber, and hydraulic means to power said pump plunger in the opposite direction. The hydraulic means includes a passage containing fuel under pressure in continuous communication with the pump chamber with a one-way valve in the passage unseated by the pressure therein after the release of the pump plunger by the rollers to hydraulically power the plunger against said stop and fully charge said pump chamber prior to each pumping stroke of the pump plunger, the tappet being mounted by a timing piston to shift the timing of the pumping strokes according to engine operating parameters. A spill metering system is disclosed with the spilled fuel being stored in an accumulator to supply the fuel for the succeeding pumping stroke. The hub is hollow and mounts Z-shaped flyweights so that they are insensitive to shock forces and have a rate of increase in their rotating moment substantially less than a square function of speed to provide, in cooperation with a unique pressure regulator, a control pressure for the governor and timing functions of the fuel injection.
REFERENCES:
patent: 2263786 (1941-11-01), Rumpp, Jr.
patent: 2650543 (1953-09-01), Pauget
patent: 2660992 (1953-12-01), Roosa
patent: 3486492 (1969-12-01), Lehnerer
patent: 3494288 (1970-02-01), Watson
patent: 3699939 (1972-10-01), Eckert et al.
patent: 4037573 (1977-07-01), Swift
patent: 4037574 (1977-07-01), Swift
Myhre Charles J.
Nelli R. A.
Stanadyne Inc.
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