Crankshaft decoupler

F - Mech Eng,Light,Heat,Weapons – 16 – F

Patent

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Details

F16F 15/123 (2006.01) F16D 41/20 (2006.01) F16D 47/02 (2006.01)

Patent

CA 2202534

A crankshaft decoupler (10) has a mounting hub (12), a pulley (14) rotatably mounted on the mounting hub (12), an annular carrier (26) mounted within said pulley (14), a biasing device (38) mounted therebetween, and a one way clutch (40) mounted between the annular carrier (26) and the pulley (14). The biasing device (38) cushions the belt drive from crankshaft impulses and lowers the angular resonant frequency of the belt system. The one way clutch (40) prevents sudden reversal of the belt tension in the drive due to start/stop of the engine or sudden deceleration of the engine and prevents momentary reverse slip belt squeal as a result of the tensioners' inadequate output for the reverse mode. The one way clutch (40) limits the maximum amount of torque which may be transmitted preventing belt slippage during momentary overload.

Découpleur de vilebrequin (10) comprenant un moyeu de fixation (12), une poulie (14) montée rotative sur le moyeu de fixation (12), un support annulaire (26) fixé à l'intérieur de ladite poulie (14), un élément de ressort (38) intercalé entre cesdits éléments, ainsi qu'un embrayage à roue libre (40) disposé entre le support annulaire (26) et la poulie (14). L'élément de ressort (38) amortit l'entraînement par courroie des impulsions produites par le vilebrequin et abaisse la fréquence de résonance angulaire du système de courroie. L'embrayage à roue libre (40) empêche l'inversion brusque de la tension de la courroie d'entraînement imputable au démarrage/arrêt du moteur ou bien à la décélération du moteur et empêche le grincement de courroie provoqué par le frottement inverse momentané résultant de l'effort inadapté des tendeurs du mode d'inversion. L'embrayage (40) limite le couple maximum pouvant être transmis, empêchant le glissement de courroie lors d'une surcharge momentanée.

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