Injector

摘要

An injector comprises an injection nozzle (1) having a nozzle hole (3), a valve body (2) for controlling a fuel flow through the nozzle hole (3), and changing means (6,7,10,11,12,13,20) for changing a shape of fuel spray, the fuel spray being formed by the fuel which flows through the nozzle hole. The injector includes rotation preventing means for preventing the valve body (2) from rotating with respect to the injection nozzle (1) around a center axis of the valve body (2). The injector includes angular displacement controlling means (6,7) for controlling an angular displacement of the valve body (2) with respect to the injection nozzle (1). A shape of a tip of the valve body (2) is circumferencially non-uniform. <IMAGE>