Fuel injector having two-way valve control

摘要: The invention relates to a fuel injector for injecting into the combustion chamber of an internal engine, comprising nozzle needle (3). Said can move inside body (1) between position that opens injection openings and one closes by means pressure build-up/pressure reduction control space (2). (2), on overflow oil-side, be pressurized via relief line (6) containing discharge throttling element (7) high pressure-side inlet (8) provided with throttle (9), which simultaneously subjects (15) action fuel. change in (2) ensues first on-off valve (21) another (27), whereby has pre-travel (33) direction switching through (32).