Patent ID: 9382885
Filing Date: 2016-07-05
CPC Classification: F02M

Claim Text:
1. A fuel injection valve for an internal combustion engine, comprising: a housing, a valve needle with a needle axis being movably positioned in the housing, a first spring element that biases the valve needle towards a closing position for sealing a nozzle orifice of the fuel injection valve, a movable armature that is movable along the needle axis and operable to interact with the valve needle for displacing the valve needle away from the closing position against the bias of the first spring element, wherein the armature comprises a first armature part and a second armature part, wherein the first armature part and the second armature part laterally enclose the valve needle at least in places, a pole element that is immovably arranged in the housing and which is operable to limit movement of the armature, and a magnetic coil at least partially enclosing the housing and operable to generate a magnetic field for effecting an axial travel of the armature towards the pole element for displacing the valve needle away from the closing position, wherein, during a first period of the axial travel, at least the second armature part is axially displaced with respect to the valve needle while the valve needle remains in the closing position, the axial displacement being limited so that the second armature part is operable to engage with the valve needle at an end of the first period for displacing the valve needle away from the closing position, wherein during a subsequent second period of the axial travel, the first armature part, the second armature part and the valve needle are positionally fix with respect to each other and travel axially with respect to the housing ( wherein the axial travel of the second armature part is stopped at an end of the second period by means of interaction with the pole element, such that during a subsequent third period of the travel, only the first armature part travels further towards the pole element for moving the valve needle further away from the closing position and the axial travel of the first armature part is subsequently stopped at an end of the third period by means of interaction with the pole element.