Unit injector for an engine

摘要

A unit injector including a plunger, a high pressure fuel chamber, and a needle, wherein the pressure of fuel in the high pressure fuel chamber is increased by the plunger, a spill valve is slidably inserted in a bore to spill the fuel in the high pressure fuel chamber when a fuel injection is to be stopped, and the slide bore is spaced from and extends in parallel to a line which intersects the common axis of the plunger and the needle at a right angle.