Fuel injection valve for IC engines has pressure-reducing throttle between high-pressure fuel in fuel chamber/line and lower pressure fuel in valve needle actuator area

摘要

The valve has an injection nozzle (1) with needle (2) operated by an actuator (6). The pressure of the fuel (12) present in the actuator area relative to the pressure of the fuel (11) used for injection, is reduced by a throttle (14), which is positioned between the fuel chamber (8) and the actuator. The throttle is located between a valve spring (4) next to the fuel chamber and an actuator spring (15). The fuel chamber is a spiral chamber with tangential flow channels.