Patent ID: 6412704
Filing Date: 2002-07-02
Classification: F02M

Abstract:
A fuel injector comprising:an injector body defining a nozzle outlet; a needle valve member having a closing hydraulic surface and being mounted in said injector body and being movable a lift distance between an open position in which said nozzle outlet is open, and a closed position in which said nozzle outlet is blocked; a piezoelectric actuator mounted in said injector body and being movable a piezo distance between an off position and an on position; a coupling linkage interconnecting said closing hydraulic surface of said needle valve member to said piezoelectric actuator, and said coupling linkage multiplying movement of said piezoelectric actuator into a larger movement of said needle valve member; and said needle valve member being stoppable in a partially open position between said open position and said closed position when a predetermined voltage is applied to said piezoelectric actuator.