Injector for fuel injection system of internal-combustion engine in motor vehicle, has guidance for servo piston designed at separation element and limiting coupler space together with separation element and piston

摘要

The injector (1) has an injector body (2) with a needle section (4) and a piston section (3). A servo piston (6) is arranged in the piston section in a stroke adjustable manner, and limits a control chamber (7) at a front side in an end and a coupler space (8) in another end. A passage opening (23) is provided in a separation element (5), and hydraulically connects the coupler space with a needle-sectional-sided needle control space (22). A guidance (17) for the piston is designed at the separation element and limits the coupler space together with the separation element and the piston.