Injection pump for diesel-cycle internal combustion engines

Details Injection pump for diesel-cycle internal combustion engines Injection pump for diesel-cycle internal combustion engines

1998-05-26

1999-10-05

Argenbright, Tony M.

Pumps

Expansible chamber type

Pumping member position controlled port

123467, F02M 5926, F02M 4506

Patent

active

059613041

ABSTRACT:
An injection pump for diesel-cycle internal combustion engines includes a casing (1), a cylinder (6) within the casing and communicates, via at least one radial aperture (51), with a fuel intake chamber (3), and a piston (7) sealedly slidable within the cylinder and which, by external command, can also rotate about its axis to assume different angular orientations about a reference plane. In its jacket, a helical groove (72) opens into an axial groove (71), wherein the top, or roof, of the piston (7) is connected via a hole (77) to two channels (178, 179) provided at different levels in the piston jacket. The first (178) is in an intermediate position between the top of the piston and highest part of the groove (72) and during the reciprocating movement of the piston (7) faces a first radial aperture (52) provided in the cylinder and communicates with the fuel intake chamber (3), the second (179) is at a distance from the top of the piston such that, when in the top dead center position, it mates with a radial aperture (53) provided in the cylinder and communicates with the fuel intake chamber (3).

REFERENCES:
patent: 3648673 (1972-03-01), Knape
patent: 3930480 (1976-01-01), Yamada et al.
patent: 4711221 (1987-12-01), Laufer

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