Fuel injector for internal combustion engine for injecting fuel under high pressure, comprises nozzle needle and control valve which controls nozzle needle for opening and closing injection opening

摘要

The fuel injector comprises a nozzle needle (10) and a control valve (30) which controls the nozzle needle for opening and closing an injection opening. The control valve comprises a control valve link with a valve piston (34) and a valve sleeve (36) having a section (50). The pressure acting on the valve sleeve in a control valve chamber (31), deforms the valve sleeve for reducing a guide gap (32) between the valve piston and valve sleeve.