Fuel injector for common-rail-injection system of direct injection diesel engine, has high-pressure piston cooperating with fuel tank that is filled via fuel supply line and connected with injection port via injection valve

摘要

The injector (1) has an actuator body formed as a piezoactuator (3) and held by a holding body (2). A high-pressure piston (6) cooperates with the actuator body, and an injector part is provided with a fuel supply line (8) and an injection port (11). The piston cooperates with a fuel tank (7) that is filled via the fuel supply line and connected with the injection port via a pressure-controlled injection valve (10). A sealing element is arranged between the actuator body and piston. The fuel supply line cooperates with the fuel tank via a non-return valve (9). An independent claim is also included for a method for operating a fuel injector.