| 摘要 |
A fuel injection valve for an internal combustion engine is disclosed, comprising a housing (2), a valve needle (3) with a needle axis (4), a first spring element (8), a movable armature (12) which comprises a first armature part (13) and a second armature part (14), a pole element (10), and a magnetic coil (11) which is operable to generate a magnetic field for effecting an axial travel of the armature (12) towards the pole element (10) for displacing the valve needle (3) away from a closing position. During a first period of the axial travel, at least the second armature part (14) is axially displaced with respect to the valve needle (3) while the valve needle (3) remains in the closing position. The second armature part (14) is operable to engage with the valve needle (3) at the end of the first period for displacing the valve needle (3) away from the closing position. During a subsequent second period of the axial travel, the first armature part (13), the second armature part (14) and the valve needle (3) are positionally fix with respect to each other and travel axially with respect to the housing (2). The axial travel of the second armature part (14) is stopped at the end of the second period so that, during a subsequent third period of the travel, only the first armature part (13) travels further towards the pole element (10) for moving the valve needle (3) further away from the closing position and the axial travel of the first armature part (13) is subsequently stopped at the end of the third period. |
