Patent ID: 6050496
Filing Date: 2000-04-18
Classification: F02M,Y10T

Abstract:
An actuation fluid control valve for a hydraulically actuated fuel injector, comprising:an injector body having an actuation fluid control passage, a low pressure actuation fluid drain passage, and a high pressure actuation fluid supply passage for accepting high pressure actuation fluid into the fuel injector;an actuator attached to the injector body; anda rotatable valve member including a first valve passage and a second valve passage, 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, and 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.