Variable valve gear

Details Variable valve gear Variable valve gear

F - Mech Eng,Light,Heat,Weapons

01

L

F01L 13/00 (2006.01)

Patent

CA 2535323

The invention provides a variable valve gear particularly for internal combustion engines, in which a control cam (2) of a camshaft (1) acts, by way of a free cam follower, being supported on a rotatable control surface, to a valve (4) to produce an adjustment of the valve stroke. The valve stroke can vary continuously from a maximum value to zero while the valve clearance is held unchanged. In one case the system is nothing more than a roller (6) trapped among a cam lobe, a control shaft (7) and a valve actuator (5).

La présente invention concerne une commande de soupapes variable destinée en particulier aux moteurs à combustion interne et dans laquelle une came de commande (2) d'un arbre à cames (1) agit, au moyen d'un galet de came libre reposant sur une surface de commande rotative, sur une soupape (4) pour générer un réglage de la course de la soupape. La course de la soupape peut varier en continu entre une valeur maximale et zéro tandis que le jeu des soupapes demeure inchangé. Dans un mode de réalisation, le système n'est rien de plus qu'un galet (6) coincé entre un bossage de came, un arbre de commande (7) et un actionneur de soupape (5).

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