Rotational actuation fluid control valve for a hydraulically act

Details Rotational actuation fluid control valve for a hydraulically act Rotational actuation fluid control valve for a hydraulically act

1998-12-17

2000-04-18

Shaver, Kevin

Fluid sprinkling, spraying, and diffusing

Injection nozzle opened by relieving supply

239 95, 239 88, 13762565, 13762522, F02M 5100

Patent

active

060504978

ABSTRACT:
An actuation fluid control valve for a hydraulically actuated fuel injector comprises an injector body having a high pressure actuation fluid supply passage for admitting high pressure hydraulic actuation fluid into the fuel injector, an actuation fluid control passage for admitting the high-pressure hydraulic actuation fluid to commence fuel injection, a low-pressure actuation fluid drain passage for draining the hydraulic actuation fluid from the fuel injector, and a check valve fluid control passage for admitting the high pressure hydraulic actuation fluid to terminate fuel injection. An actuator is attached to the injector body. A rotatable valve member includes a first valve passage and a second valve passage and is disposed in the injector body such that high pressure actuation fluid entering from the high pressure actuation fluid supply passage will not bias the rotatable valve member either toward the first position or toward the second position. The rotatable valve member is rotatable in response to the actuator between a first position in which the high pressure actuation fluid supply passage is in fluid communication with the actuation fluid control passage via the first valve passage, and a second position in which the high pressure actuation fluid supply passage is not in fluid communication with the actuation fluid control passage.

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