Patent ID: 7568633
Filing Date: 2009-08-04
Classification: F02B,F02M

Abstract:
1. An intensifier type fuel injector comprising: a fuel injector assembly having an intensifier plunger operative to pressurize fuel for injection when encouraged toward a first direction; first, second and third hydraulic piston areas, each disposed relative to the intensifier plunger to apply a force to the intensifier plunger to encourage the intensifier plunger toward the first direction when an actuating fluid under pressure is coupled to a respective hydraulic piston areas; and, three three-way valves, each being configured to couple a respective control port to a three-way valve supply port when in a first position and to a vent port when in a second position, the first three-way valve being coupled to the first hydraulic piston area, the second three-way valve being coupled to the second hydraulic piston area, and the third three-way valve being coupled to the third hydraulic piston area; the three three-way valves being operable alone or in any combination to couple the supply port to any of the first hydraulic piston area, the second hydraulic piston area, the third hydraulic piston area, the first and second hydraulic piston areas, the first and third hydraulic piston area, the second and third hydraulic piston areas and the first, second and third hydraulic piston areas.