BALANCED METERING SERVOVALVE FOR A FUEL INJECTOR OF AN INTERNAL COMBUSTION ENGINE

摘要

A balanced metering servo valve for a fuel injector of an internal combustion engine is provided to suppress deterioration of the injector and due to the rebound of the sleeve and maintain constant movement of the metering servo valve and the injector. A balanced metering servo valve for a fuel injector of an internal combustion engine comprises an electric actuator(15), a fixed valve body including a control chamber(26) in which an inlet port(4) and an outlet port channel(42) are connected and a stem(38) extended along an axis(3), and a sleeve(18) hermetically connected to a side surface(39) of the stem while sliding along the axis between the closing position for closing the outlet port channel with an end(47) and the opening position for opening the outlet port channel in order to change the pressure in the control chamber.