Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1975-02-07
1977-07-19
Dority, Jr., Carroll B.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123139DP, F02M 4702
Patent
active
040361926
ABSTRACT:
A plunger slidable in a barrel of a plunger pump is actuated by an engine driven camshaft to feed high pressure fuel through a delivery valve to an injection nozzle. A needle type valve element extends through a nozzle chamber in the nozzle connected to the pump to control fuel flow from the nozzle chamber through an injection orifice into the engine. The needle end of the valve element is exposed to pressurized fuel in the nozzle chamber, and a spring applies a force to the other end of the valve element to urge the valve element to block the injection orifice. As the pump plunger moves through its injection stroke, the pressure in the nozzle chamber increases and overcomes the force of the spring to move the valve element to unblock the orifice to initiate fuel injection. Near the end of the plunger stroke, the plunger uncovers a hole in the barrel so that pressurized fuel is fed through passageways in the plunger, the hole and a check valve to a surface of the valve element to apply a force to the valve element in the same direction as the spring force to move the valve element to block the orifice and terminate fuel injection without valve element rebound or fuel dribbling.
REFERENCES:
patent: 2173811 (1939-09-01), Bischof
patent: 2173812 (1939-09-01), Bischof
patent: 3505984 (1970-04-01), Mansfield
patent: 3625192 (1971-12-01), Dreisin
patent: 3810453 (1974-05-01), Wolfe
Argenbright Tony M.
Connors Edward F.
Diesel Kiki Co.
Dority Jr. Carroll B.
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