Electromagnetic valve motion control

Motion control combined with an electromagnetic valve having an armature, a valve including a head connected by a stem with the armature for reciprocating movement between a valve closed position wherein the head engages a valve seat and a valve open position wherein the valve engages a stop, said motion control comprising:

• a follower connected with the valve for reciprocating motion therewith;
• a restraint operable on the follower and operative during valve motion approaching the open and closed positions of the valve to slow the valve motion and reduce the force of engagement of the valve with the valve seat and the stop, the restraint including one of hydraulic and mechanical motion constraining devices;
• wherein the restraint is a track engaged by the follower and operative to develop rotational motion of the valve for slowing the valve motion.

Motion control combined with an electromagnetic valve having an armature, a valve including a head connected by a stem with the armature for reciprocating movement between a valve closed position wherein the head engages a valve seat and a valve open position wherein the valve engages a stop, said motion control comprising:

• a hydraulic piston connected with the valve stem and positioned within a fluid-filled cylinder and defining an upper hydraulic chamber and a lower hydraulic chamber;
• said upper and lower hydraulic chambers each having a port connecting said chambers to a bypass passage at a location spaced apart from their ends such that fluid flow through the bypass passage is regulated by the positional relationship of the piston to the ports;
• a restrictive flow tube, external to said cylinder, and connected to said upper and lower hydraulic chambers at their ends such that when said piston is positioned to block one of said ports, fluid-flow is essentially limited to said restrictive flow tube thereby slowing valve motion.