INJECTION SUPPLY PATTERN CONTROL PORT CHECK STOP MEMBER OF FUEL INJECTION NOZZLE

摘要

PROBLEM TO BE SOLVED: To reduce a fuel amount injected at an initial stage of an injection cycle by being provided with a needle check and a control port check in a cavity of a discharge passage provided with a spray orifice at one end and a control port of a small diameter at the other end. SOLUTION: The fuel injector in an electronic control injector system includes a fuel pump plunger 70 corresponding to an intensifier piston and a plunger spring is disposed between a piston and a barrel 74. A control port check 14 is provided on a nozzle tip end assembly 10 continuously provided on a tip end of the fuel injector and a stop member 80 abutting to the barrel 74 and a sleeve 90 abutting to the stop member 80 are provided. A needle check tip end 96 is abutted to an opposite end surface of the sleeve 90 to the stop member 80. A valve 117 capable of seating on a seat 119 on which the control port 84 is formed is disposed in the sleeve 90.