Actuator for IC engine valve - has electromagnets with dish shaped ring poles with wedges forming cylindrical chamber for armature

摘要

The valve actuator has two electromagnets opposite each other in the axial direction. These have ring poles (4,5). An armature (6) is attached to the valve shaft and moves inside the poles (4,5) in the axial direction. The ring poles (4,5) are dish-shaped with concentric wedges (11). These define a cylindrical chamber for the armature (6). ADVANTAGE - Allows quick and accurate valve switching and allows valve to be set to intermediate positions.