초록 ▼

A fuel injector includes an injector body that defines a nozzle outlet. A needle valve member is mounted in the injector body and moveable a lift distance between an open position in which the nozzle outlet is open, and a closed position in which the nozzle outlet is blocked. A piezoelectric actuato

A fuel injector includes an injector body that defines a nozzle outlet. A needle valve member is mounted in the injector body and moveable a lift distance between an open position in which the nozzle outlet is open, and a closed position in which the nozzle outlet is blocked. A piezoelectric actuator is mounted in the injector body and is moveable a piezo distance between an off position and an on position. A coupling linkage interconnects the needle valve member to the piezoelectric actuator such that a movement of the piezoelectric actuator is multiplied into a larger movement of the needle valve member.

대표청구항 ▼

[ What is claimed is:] [17.] A fuel injector including:an injector body defining a nozzle outlet;a needle valve member movably mounted in said injector body;a piezoelectric actuator movably mounted in said injector body;a coupling linkage interconnecting said needle valve member to said piezoelectri

[ What is claimed is:] [17.] A fuel injector including:an injector body defining a nozzle outlet;a needle valve member movably mounted in said injector body;a piezoelectric actuator movably mounted in said injector body;a coupling linkage interconnecting 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 coupling linkage including said injector body defining a needle control chamber; andsaid needle valve member including a closing hydraulic surface exposed to fluid pressure in said needle control chamber; anda flow area past said needle valve member to said nozzle outlet being a function of a voltage applied to said piezoelectric actuator.