Impact damper for the electromagnetic valve drive in an IC motor has a projecting surface at the piston struck by the armature directly before reaching the magnet to force a hydraulic medium out through an opening for damping

摘要

The hydraulic impact damper (1), especially for the armature (5) of an electromagnetic valve drive in an internal combustion motor, has a hydraulic structure where the movement energy of the armature (5) is damped directly before it reaches an opening or closing magnet (2) so that the armature (5) meets a projecting surface (38) of the piston (16), which also has a hydraulic medium. The hydraulic medium is forced out through a diaphragm opening (20) on the downwards movement of the piston (16) with the armature (5), and the armature (5) speed is damped.