Patent ID: 7963465

Claim:
An injection valve for a fuel-injection system of an internal combustion engine, comprising: a one-piece valve-seat support; a valve seat situated at an end of the one-piece valve-seat support and having a valve opening, wherein the valve opening and the valve seat are integrally formed on the one-piece valve-seat support; a valve needle coaxially disposed in the valve-seat support so as to be axially displaceable, wherein the valve needle has a valve-closure member at a first end facing the valve seat, and wherein the valve closure member cooperates with the valve seat in order to close and release the valve opening; a solenoid for providing a lift actuation of the valve needle, wherein the solenoid includes an inner, hollow-cylindrical magnetic core, an outer magnetic cup, and a solenoid coil which is situated between the magnetic core and the magnetic cup, and wherein the solenoid coil is connected to a connector plug; a magnetic armature situated axially opposite the solenoid core and disposed at a second end of the valve needle facing away from the valve-closure member; and a connection piece for supplying fuel, wherein the connection piece includes a filter; wherein axial guidance of the valve needle is provided by the valve-seat support, and wherein the solenoid coil and the connector plug are combined into a separate plastic-extrusion-coated coil part which is placed on top of the valve-seat support, and wherein the magnetic cup is placed on top of the plastic-extrusion-coated coil part in such a way that a magnetic circuit including the solenoid core, the magnetic cup, the valve-seat support and the magnetic armature is closed, and wherein the connection piece is formed as a second separate plastic extrusion-coated component in which the filter is integrated, and wherein joining and sealing points are bonded between the connection piece on one side and at least one of the coil part, the magnetic cup and the valve-seat support on the other side.