Patent ID: 7182054

Claim:
A valve drive ( 1 ) including a rocker lever arrangement for a piston internal combustion engine including a control cam ( 4 . 1 ) with an additional cam ( 4 . 2 ), a first rocker lever ( 2 . 1 ) and a second rocker lever ( 2 . 2 ), which are pivotably supported on a rocker lever support shaft ( 2 ), the first rocker lever ( 2 . 1 ) being in operative contact with at least a first cylinder valve ( 3 . 1 ) and the second rocker lever ( 2 . 2 ) including an actuator element ( 5 ) for operative engagement with the first rocker lever ( 2 . 1 ), the control cam ( 4 . 1 ) being in operative contact with the second rocker lever ( 2 . 2 ) for transferring pivot motion from the second rocker lever ( 2 . 2 ) controllably to the first rocker lever ( 2 . 1 ) and at least the additional cam ( 4 . 2 ) being in operative contact with the second rocker lever ( 2 . 2 ) depending on the actuation of the actuator element ( 5 ), said actuator element ( 5 ) having a locking direction which corresponds to the direction of a locking force acting between the first rocker lever ( 2 . 1 ) and the second rocker lever ( 2 . 2 ), and the locking direction extending in a plane perpendicular to a central axis ( 2 . 3 ) of the rocker lever support shaft ( 2 ) and at a distance from the central axis ( 2 . 3 ).