Patent ID: 7055475
Filing Date: 2006-06-06
Classification: F01L

Abstract:
1. A rotary actor device for stroke control of a charge-change poppet valve in the cylinder head of an internal combustion engine, comprising a characteristic-curve controlled rocker motor as a rotary actor with a rotor operated alternately between terminal rotary abutments, which serves through a shaft with a control disk fixed thereon for rotation, with a section-wise cam profile of the stroke control of the poppet valve urged by a closing spring, the poppet valve furthermore being forced in the opening direction by means of a spring positioned in/on the cylinder head by a spring arm acting with bias on a lever affixed to a shaft, and furthermore the spring serves for the secure contact with abutments affixed to the shaft against the end rotation abutments associated with the closed position or open position of the poppet valve by means of the spring arm acting on the lever affixed to the shaft, with such reduced force that on the one hand the secured starting position up to a predetermined rocking frequency of the shaft or rotor by means of the rocking motor is overcome at relatively low energy input, and on the other hand, beyond the predetermined rocking frequency the starting position secured in each case is overcome by means of a ricochet movement produced by a resilient deformation of one of the colliding corresponding abutments, then an additional reduced energy input is achieved by means of the rotor of the rocking motor which is chosen to be relatively large corresponding to the energy exchange of the closing spring and poppet valve.