| 摘要 |
A fuel injector (1) for fuel injection systems in internal combustion engines has a magnet coil (10), an armature (20) that is acted upon in a closing direction by a restoring spring (23), and a valve needle (3) that is non-positively engaged with armature (20) for actuating a valve closing body (4), which together with a valve seat surface (6) forms a sealing seat, armature (20) with an inlet-side armature surface (34) striking internal pole (13). A choke point (36) is provided on inlet-side armature surface (34), and is formed by an annular, stepped prominence (35) on inlet-side armature surface (34).
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