Patent ID: 6202609
Filing Date: 2001-03-20
Classification: F01L

Abstract:
An electromagnetically operating control device for at least one gas-exchange valve assembly of a reciprocating piston engine having a crankshaft and a cylinder in which a piston having a base reciprocates, the control device comprising:a safety lock shaft driven by said crankshaft in a ratio of 1:1;said gas-exchange valve assembly including a plate for opening and closing a valve opening in said cylinder; an electromagnetically driven actuator which is subject to disturbances affecting the operability thereof; a mechanism for transmitting movement to said plate to perform the opening and closing operation of said valve opening; and, said actuator being operatively connected to said mechanism for imparting movement thereto; and,said safety lock shaft having at least one cam disposed thereon for engaging and displacing said mechanism by an amount sufficient to reliably prevent a collision between said base of said piston and said plate when said disturbance occurs.