Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger – Fluid operated plunger motor
Patent
1998-11-19
2000-07-11
Weldon, Kevin
Fluid sprinkling, spraying, and diffusing
Unitary injection nozzle and pump or accumulator plunger
Fluid operated plunger motor
239 95, 2395338, F02M 4702
Patent
active
06085992&
ABSTRACT:
A hydraulically actuated fuel injector includes an injector body containing an intensifier piston with a hydraulic surface exposed to fluid pressure in a hydraulic pressure cavity. This hydraulic surface includes an annular taper and moves within a bore due to the pressure in the hydraulic pressure cavity. Prior to the injection event, the intensifier piston is in a retracted position that partially blocks at least one actuation fluid supply passage. At the initiation of the injection event, the partial blocking of the actuation fluid passage results in a slower initial movement rate of the intensifier piston. The injection flow rate is a function of the speed of the intensifier piston. The initial rate shaping is accomplished by controlling the initial speed of the intensifier piston by at least partially blocking one or more of the actuation fluid supply passages.
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Chockley Scott A.
Graves Jeffrey D.
Caterpillar Inc.
McNeil Michael B.
Weldon Kevin
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