Patent ID: 6390384
Filing Date: 2002-05-21
Classification: F02M

Abstract:
A fuel injection device for use with an engine, the device comprising:a body having a longitudinal channel, an injection chamber in communication with the longitudinal channel, and a first fuel supply passage in communication with the injection chamber; a first plunger, a second plunger, and an intermediate plunger, said first plunger, at least partially positioned within the longitudinal channel, to receive an applied force to effect a discharge of fuel from the device; said second plunger, having a first end positioned within the injection chamber, to effect a discharge of fuel from the injection chamber in response to an applied force; said intermediate plunger positioned within the longitudinal channel and disposed between said first plunger and said second plunger; and a second fuel supply passage, in communication with the injection chamber and extending axially downstream of the fist fuel supply passage, to supply additional fuel to the injection chamber during an increase in fuel demand on the engine as indicated by a fuel pressure within the first fuel supply passage reaching a prescribed fuel pressure, the second fuel supply passage including: a valve to control a fuel flow through the second fuel supply passage such that fuel passes through the second fuel supply passage when the prescribed fuel pressure is reached, and a spring, in contact with the valve, to bias the valve in a closed position and to allow the valve to open at the prescribed fuel pressure.