A fuel injector includes an injection control valve having a stator core that is electrically isolated from surrounding parts such as a stator housing. The stator core includes a first annulated wall having an inner surface, a second annulated wall having an outer surface, a radially extending wall connecting the first and second annulated wall, and a radially extending slot extending through the first annulated wall, the radially extending wall, and the second annulated wall. The stator core may include a limited number of contact points with the stator housing. Alternatively or additionally, an electrically insulating material may be placed between the stator core and the stator housing.

A solenoid includes: a coil wound around a bobbin; a case section accommodating the coil; a tubular yoke arranged on an inner circumferential portion of the coil; and a plunger arranged on an inner circumferential portion of the yoke, and moving from a start position along an axial direction of the yoke by magnetic attraction force generated in the yoke, wherein a diameter increasing portion whose diameter is increased from the start position toward a lower part in the axial direction is formed on an outer circumferential surface of the yoke, and the diameter increasing portion overlaps at least a part of a moving region of a lower-part side end portion of the plunger, and wherein an inner circumferential surface of the yoke guides the movement of the plunger and the yoke includes a contact member that regulates the movement of the plunger on the inner circumferential surface.

An electromagnetic solenoid is disclosed. The solenoid includes a coil, a bobbin, a flux sleeve, an armature, and a pole piece, arranged in such a way that the solenoid is robust against misalignment of the pole piece with the flux sleeve. The configuration facilitates the integration of either the pole piece or the flux sleeve into a hydraulic circuit.

An electromagnetic solenoid actuator includes a ferromagnetic core body defining an axis, a winding supported by the core body, and a ferromagnetic plunger body translatable within the core body along the axis. The core body has a fixed height gap that extends about the axis and the plunger body and core body define between one another a variable height gap that extends about the axis. A first flux bypass extends through the fixed height gap and a second flux bypass extends through the variable height gap that cooperate with one another to correct the attraction force between the plunger and core body as height of the variable height gap changes.

The invention relates to a solenoid housing fabricated by a method which allows a manufacturer to produce a high performing product while minimizing manufacturing complexity and time. The instant invention uses cold-forging techniques to reduce the need for fine machining processes.

A magnetic actuator device, in particular hydrogen-gas-tight magnetic actuator device, includes at least one magnetic core and at least one core tube, which is at least substantially magnetically separated along its axial direction, wherein, for achieving a hydrogen gas tightness, the magnetic core is formed completely closed in the axial direction at least on one side and the core tube is realized monolithically with the magnetic core.

The disclosure relates to an electromagnetic actuating device for a hydraulic camshaft adjuster. The electronic actuating device includes a housing, a yoke, a pole core, an armature, and an actuating pin and a bearing unit. The actuating pin is led out of the housing by means of the bearing unit, and the bearing unit forms a press-fit connection with the housing or with a component connected to the housing. To improve the connection, the bearing unit, the housing and/or the component connected to the housing have a recess that increases the elasticity of the press-fit connection.