Importance

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Abstract

A dosing unit includes a fluid injector having a valve seat; a valve needle movable within the fluid injector between a closed position in which an end engages with the valve seat to block a flow of fluid from exiting the fluid injector and an open position in which the end is spaced apart from the valve seat so as to allow fluid to exit the fluid injector. The valve body, the valve seat and the valve needle form an outwardly opening valve assembly. A pole piece fixedly is disposed within the valve body, and an armature is coupled to the valve needle upstream of the pole piece. A coil is disposed around the pole piece and the armature so as to generate a force when energized to move the armature toward the pole piece and to cause the valve needle to move from the closed to the open position.

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First Claim