Patent ID: 6227166
Filing Date: 2001-05-08
Classification: F02M

Abstract:
A fuel injection system comprising:a plurality of fuel injectors, each of said plurality of fuel injectors defining an actuation fluid cavity, a fuel inlet, at least one actuation fluid supply passage, at least one fuel fluid supply passage and a nozzle outlet, and including an electronically controlled direct control needle valve;said at least one actuation fluid supply passage of each of said plurality of fuel injectors being fluidly connected to a source of high pressure actuation fluid;said at least one fuel fluid supply passage of each of said plurality of fuel injectors being fluidly connected to a source of fuel fluid;said source of high pressure actuation fluid being different from said source of fuel fluid;said at least one actuation fluid supply passage of each of said plurality of fuel injectors being blocked from fluid communication with said at least one fuel fluid supply passage of each of said plurality of fuel injectors; andan exclusively mechanically actuated valve attached to each of said actuation fluid supply passages and movable between first position in which each of said at least one actuation fluid supply passages is open and a second position in which each of said at least one actuation fluid supply passages is closed.