초록 ▼

An injector body defines a fuel pressurization chamber, a spill passage, a stop volume and a nozzle outlet. Positioned within the injector body is a plunger which is movable between a retracted position and an advanced position. The plunger opens the spill passage to the fuel pressurization chamber

An injector body defines a fuel pressurization chamber, a spill passage, a stop volume and a nozzle outlet. Positioned within the injector body is a plunger which is movable between a retracted position and an advanced position. The plunger opens the spill passage to the fuel pressurization chamber over a portion of the distance between the retracted and advanced positions. The injector body also contains a needle valve member which includes a closing hydraulic surface that is exposed to fluid pressure in the stop volume. The stop volume is pressure coupled to the spill passage.

대표청구항 ▼

[ What is claimed is:] [1.] A fuel injector comprising:an injector body defining a fuel pressurization chamber, a spill passage, a low pressure area, a stop volume and a nozzle outlet;a plunger positioned in said injector body and being movable a distance between a retracted position and an advanced

[ What is claimed is:] [1.] A fuel injector comprising:an injector body defining a fuel pressurization chamber, a spill passage, a low pressure area, a stop volume and a nozzle outlet;a plunger positioned in said injector body and being movable a distance between a retracted position and an advanced position;said plunger opening said spill passage to said fuel pressurization chamber over a portion of said distance;a needle valve member with a closing hydraulic surface exposed to fluid pressure in said stop volume; andsaid stop volume being pressure coupled to said spill passage at a location away from said low pressure area.