Stroke-variable engine

F - Mech Eng,Light,Heat,Weapons – 02 – B

Patent

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Details

F02B 75/04 (2006.01) F01L 1/04 (2006.01) F02D 15/02 (2006.01) F16C 3/06 (2006.01) F16H 21/34 (2006.01)

Patent

CA 2556462

A stroke-variable engine includes a pivot shaft which is rotatably supported in a crankcase so as to be rotatable about an eccentric axis parallel to a crankshaft and which is connected to a control rod so that a rotational power reduced at a reduction ratio of 1/2 is transmitted from the crankshaft to the pivot shaft. A camshaft of a valve-operating mechanism mounted at an upper portion of an engine body and the pivot shaft are operatively connected to each other. Thus, it is possible to decrease the number of parts of the valve-operating mechanism, increase a rotational speed, and further reduce mechanical noise.

Moteur à combustion à course variable comprenant un arbre de pivotement qui est soutenu en rotation dans un carter de manière à pouvoir tourner autour d'un axe excentrique parallèle à un vilebrequin et qui est relié à une tige de commande de sorte que la puissance de rotation, réduite à un rapport de réduction de 1/2, est transmise du vilebrequin à l'arbre de pivotement. L'arbre à cames d'un mécanisme de commande de soupape, monté sur une partie supérieure du corps de moteur, et l'arbre de pivotement sont reliés l'un à l'autre de manière fonctionnelle. Ainsi, il est possible de diminuer le nombre de pièces rattachées au mécanisme de commande d'une soupape, d'augmenter la vitesse de rotation, et de réduire davantage les bruits mécaniques.

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