| 摘要 |
An actuator for a hydraulic valve of a cam phaser, the actuator including a magnet housing receiving a magnetized metal sleeve and a coil that is radially enveloped by the magnetized metal sleeve generating a magnetic field, wherein the coil is fixated in a non-magnetizable coil carrier that is positioned in a cavity of the magnet housing, wherein the coil carrier at least partially envelops a pole core and a pole core yoke that is axially offset from the pole core, wherein the pole core and a pole core yoke are positioned so that they radially define a non-magnetic sleeve, wherein the non-magnetic sleeve forms a divider wall between the cavity of the magnet housing and an inner cavity of the non-magnetic sleeve. |
| 主权项 |
1. An actuator for a hydraulic valve of a cam phaser, the actuator comprising:
a magnet housing receiving a magnetized metal sleeve and a coil that is radially enveloped by the magnetized metal sleeve generating a magnetic field, wherein the coil is fixated in a non-magnetizable coil carrier that is positioned in a cavity of the magnet housing, wherein the coil carrier at least partially envelops a pole core and a pole core yoke that is axially offset from the pole core, wherein the pole core and a pole core yoke are positioned so that they radially define a non-magnetic sleeve, wherein the non-magnetic sleeve forms a divider wall between the cavity of the magnet housing and an inner cavity of the non-magnetic sleeve, wherein an armature and a plunger that is operatively connected with the armature and axially moveable along a longitudinal axis of the actuator are arranged in the inner cavity of the magnetic sleeve, wherein a hydraulic fluid which improves mobility of the armature is provided in the inner cavity of the magnetic sleeve, wherein the plunger positions a valve piston of a hydraulic valve, wherein the plunger is able to contact the valve piston, wherein the plunger is configured to penetrate an entire pole core insert, wherein the pole core insert is positioned in the magnet housing so that the pole core insert is arrangeable adjacent to the hydraulic valve that is flowable by the hydraulic fluid, wherein the armature is moveable when a voltage is applied to the coil, wherein the pole core insert closes the inner cavity of the non-magnetic sleeve and the cavity of the magnet housing relative to the hydraulic valve wherein a first seal element is arranged in the cavity of the magnet housing between the pole core insert and the coil carrier wherein the first seal element envelops the non-magnetic sleeve and seals the coil against a hydraulic fluid of the hydraulic valve and against the hydraulic fluid of the inner cavity of the non-magnetic sleeve. |
