Device for moving a valve flap

Details Device for moving a valve flap Device for moving a valve flap

F - Mech Eng,Light,Heat,Weapons

02

D

F02D 11/08 (2006.01)

Patent

CA 2297227

The invention relates to a device for moving a valve flap, especially in the intake system of an internal combustion engine. The inventive device consists of a vacuum cell (20) which performs a lengthways movement in dependence on the application of a negative pressure. Said lengthways movement is transmitted to a cross-member (15) via a coupling rod (16). Said cross-member (15) is connected to a lever of the valve flap (11). The coupling rod and cross-member system allows the vacuum cell to be arranged in any position in relation to the valve flap (11). The invention can be simplified further by amalgamating the diaphragm disk (27) with the cross-member (15) so that they form a single integral part. In this case, a force is exerted excentrically on the vacuum cell. Said force can be compensated by the diaphragm having a shape other than a round contour.

L'invention concerne un dispositif pour déplacer un clapet de soupape, notamment dans le système d'admission d'un moteur à combustion interne. Ce dispositif comprend un boîtier à dépression (20) qui exécute un mouvement longitudinal en fonction d'une dépression à laquelle il est soumis. Ce mouvement longitudinal est transmis par l'intermédiaire d'une tige d'accouplement (16) à une traverse (15) reliée à un levier du clapet de soupape (11). L'ensemble tige d'accouplement et traverse permet de placer le boîtier à dépression dans n'importe quelle position, par rapport au clapet de soupape (11). On peut également simplifier le dispositif en associant la plaque membranaire (27) et la traverse (15) pour former un élément constitutif monobloc. Il en résulte alors, au niveau du boîtier à dépression (20), une force s'exerçant de façon excentrée, que l'on peut compenser en concevant la membrane de façon à ce qu'elle ne présente pas un contour rond.

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