Hydraulically actuated fuel injector with proportional control

Details Hydraulically actuated fuel injector with proportional control Hydraulically actuated fuel injector with proportional control

1997-02-26

1999-03-09

Miller, Carl S.

Internal-combustion engines

Charge forming device

With fuel pump

123446, F02M 3704

Patent

active

058787208

ABSTRACT:
A hydraulically actuated fuel injector includes an injector body having a nozzle chamber that opens to a nozzle outlet. A control valve is mounted in the injector body and is attached to a solenoid that is moveable between a rest position and a fully energized position. A piston/plunger/barrel assembly is utilized to hydraulically pressurize fuel in the nozzle chamber to a fuel pressure that is substantially proportional to an amount of current being supplied to the solenoid. A needle valve member is positioned in the nozzle chamber and moveable between an open position in which the nozzle outlet is opened and a closed position in which the nozzle outlet is blocked. Finally, a spring is utilized to bias the solenoid toward its rest position.

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