Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger – Fluid operated plunger motor
Patent
1995-01-25
1996-06-04
Weldon, Kevin P.
Fluid sprinkling, spraying, and diffusing
Unitary injection nozzle and pump or accumulator plunger
Fluid operated plunger motor
2395333, F02M 4702
Patent
active
055225454
ABSTRACT:
A hydraulically actuated fuel injector includes an intensifier piston with a tapered or conical protuberance and an injector body with a conical seat. During the pre-injection stage, the piston is spring loaded to seat its conical protuberance against the conical seat of the injector body. To start the injection, actuation fluid is admitted to the injector. The injector actuation volume is pressurized and the pressure acts initially only on the top of the conical protuberance of the piston. The displacement of the piston is temporarily retarded during the first stage of injection due to a throttling effect in allowing the high pressure fluid to act on the remaining top surface of the piston. The throttling effect is provided by the relatively narrow flow area between the conical protuberance and the conically shaped seat. The result being that the intensifier piston hesitates in its downward movement such that injection is either slowed or briefly stopped before the piston has moved sufficiently downward that the high pressure actuation fluid acts over the complete top side of the piston. As the conical protuberance of the piston clears its seat, unrestricted main injection begins.
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Camplin Frederick A.
Huang Jeffrey C.
Caterpillar Inc.
Keen Joseph W.
McNeil Michael B.
Weldon Kevin P.
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