Patent ID: 7097115

Claim:
A fuel injector assembly for an internal combustion engine, comprising: an injector body in fluid communication with a source of fuel; a nozzle assembly in fluid communication with the injector body and operable for dispersing fuel during an injection event; a high pressure fuel delivery system providing high pressure fuel to the nozzle assembly; and a regulator in fluid communication with the nozzle assembly and operable to regulate the rate and pressure of the dispersed fuel; the pressure regulator including: a housing having a valve bore and an inlet for fluid communication between the fuel system and the valve bore; a rate shaping valve movably supported within the valve bore between a closed position and an open position to regulate the rate of injected fuel, the rate shaping valve having a waste gate valve bore and an inlet for fluid communication between the fuel system and the waste gate valve bore; and a waste gate valve having a body movably supported within the waste gate bore between a closed position and an open position to regulate the pressure of the injected fuel, the waste gate valve body being cylindrically shaped along an entire axial length of the waste gate valve body.