Variable valve timing device with eccentric valve actuator sleeves

Abstract

Variable valve timing apparatus includes eccentric valve actuator sleeves which surrounds each of the valve actuators. In a preferred embodiment, the pivoting sleeves act to change the position of the valve actuator axis related to the camshaft axis. In combination with roller style cam follower, a movement of the actuator axis in camshaft rotation direction it causes a delayed valve operation, meantime a movement of the actuator axis towards the camshaft rotation direction it causes a advanced valve operation mode.

What I claim as my invention is: 
     
         1 . Variable valve timing apparatus for an internal combustion engine comprising:
 a engine block with a incorporated camshaft;   a plurality of bores for receiving valve actuators;   a plurality of valve actuators for actuating respective valves of the multiple cylinders; and   eccentric valve actuator sleeves between each of the valve actuators and their respective bores, said eccentric valve actuator sleeves being rotatable between a initial position and a changed position wherein a rotatory movement of said eccentric valve actuator sleeves causes a change in position of the corresponding valve actuators related to the camshaft rotation axis.   
     
     
         2 . Apparatus as in  claim 1  wherein a rotatory movement of a plurality of said eccentric valve actuator sleeves form a initial position to a changed position it causes a change from a delayed valve actuator operation mode to a advanced valve actuator operation mode for said plurality of valve actuators which be surrounded by said plurality of eccentric valve actuator sleeves. 
     
     
         3 . Apparatus as in  claim 1  wherein a rotatory movement of a plurality of said eccentric valve actuator sleeves form a initial position to a changed position it causes a change from a advanced valve actuator operation mode to a delayed valve actuator operation mode for said plurality of valve actuators which be surrounded by said plurality of eccentric valve actuator sleeves. 
     
     
         4 . Apparatus as in  claim 1  wherein at least a linkage unit connect at least a actuator device with a plurality of said eccentric valve actuator sleeves for simultaneous actuation of said plurality of eccentric valve actuator sleeves.