Device for the variable actuation of the gas exchange valves...

Details Device for the variable actuation of the gas exchange valves... Device for the variable actuation of the gas exchange valves...

F - Mech Eng,Light,Heat,Weapons

01

L

F01L 13/00 (2006.01)

Patent

CA 2519578

The invention relates to a device for the variable actuation of the gas exchange valves of internal combustion engines, whereby a continuously revolving cam drives an intermediate member which carries out an oscillating, pure rotational movement and moves a drive member in accordance with the respective valve lift curve via a control cam. In order to modify the valve lift curve, the position of the rotational axis of the intermediate member can be modified along an advance curve. The rotational axis of the intermediate member is represented by a pin which is freely rotatable at its guide end and which carries cam plates that are linked therewith in a rotationally fixed manner. Said cam plates define either directly or indirectly the respective required position on the advance curve. The pin is rotated via a suitable joining element.

Dispositif d'actionnement variable des soupapes d'échange des gaz de moteurs à combustion interne, dans lequel une came tournant en continu entraîne un élément intermédiaire qui effectue un mouvement de rotation pur oscillant et déplace un élément de sortie par l'intermédiaire d'une courbe de commande, en fonction de la courbe de levée de soupape concernée. La position de l'axe de rotation de l'élément intermédiaire peut être modifiée le long d'une courbe de déplacement pour modifier la courbe de levée de soupape. L'axe rotatif de l'élément intermédiaire est formé par un axe tournant librement du côté de son guidage et portant des cames solidaires en rotation avec l'axe, qui définissent directement ou indirectement la position désirée sur la courbe de réglage. L'axe est mis en rotation par l'intermédiaire d'un élément de couplage approprié.

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