F - Mech Eng,Light,Heat,Weapons – 01 – L
Patent
F - Mech Eng,Light,Heat,Weapons
01
L
F01L 1/04 (2006.01) F01L 1/08 (2006.01) F01L 13/00 (2006.01)
Patent
CA 2251836
A variable valve timing system applicable for vary the opening and closing cycle of the inlet and outlet valves of an internal combustion engine. The system comprises a cam follower (4) and a cam (1) which is rotated about the cam shaft (3) to move the valve between its open and closed position. To vary the cycle of the opening and closing of the valves, a rotational means (11 and 12) is connected to the cam follower (4) to rotate the cam follower (4) such that the cam follower (4) and cam (1) are out of alignment such that the cam lobe engages the contact surface (2) at a higher point and hence earlier than if the cam follower (4) and the cam (1) are aligned. Therefore the valve is opened sooner and closed later, increasing the degrees of cycle for which the valve is open, for example, as the engine revolutions increase.
Un système de réglage des soupapes variable permettant de modifier le cycle d'ouverture et de fermeture des soupapes d'admission et d'échappement d'un moteur à combustion interne. Ledit système comprend une contre-came (4) et une came (1) qui tourne autour de l'arbre à cames (3) afin de faire passer la soupape d'une position ouverte à une position fermée. Pour modifier le cycle d'ouverture et de fermeture des soupapes, un moyen rotatif (11, 12) raccordé à la contre-came (4) fait tourner ladite contre-came (4) de sorte que la contre-came (4) et la came (1) ne sont plus alignées et que, de cette manière, le bossage de la came entre en contact avec la surface de contact (2) à un endroit plus élevé et par conséquent plus tôt que lorsque la contre-came (4) et la came (1) sont alignées. De cette manière, la soupape s'ouvre plus tôt et se ferme plus tard, augmentant les degrés de cycle pendant lesquels la soupape est ouverte, lorsque, par exemple, les tours-moteur augmentent.
Clark Wilson Llp
Roberts Frederick William
LandOfFree
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