Solenoid actuator e.g. for internal combustion engine valve, has electromagnet with yoke, internal yoke and outer yoke limit winding chamber between itself and winding included in the winding chamber

摘要

The solenoid actuator has an electromagnet with a yoke, the internal yoke and an outer yoke limit the winding chamber between itself and a winding included in the winding chamber. The armature is composed of magnetic material in such a way that the armature is enclosed with the yoke. A ratio between a width of the winding chamber and a gap between the internal yoke and the outer yoke and height of the winding chamber as a gap between a surface area of the armature.