Flywheel assembly

A flywheel assembly, comprising:

• a first flywheel connectable to an engine;
• a second flywheel supported rotatably on said first flywheel, and together with said first flywheel defining an interior cavity, wherein said second flywheel includes a friction facing, a capturing channel formed radially inwardly of said friction facing for capturing escaped lubricating fluid driven on said friction facing-side by centrifugal force, and a plurality of circumferentially elongate through-holes extending from said capturing channel to said cavity for guiding fluid captured by said capturing channel to said cavity;
• and
• a viscous damping mechanism disposed in said cavity for viscous damping of torsional vibrations between said flywheels through a fluid contained in said damping mechanism;
• said first flywheel comprises a central first hub extending toward said second flywheel, and said second flywheel comprises a central second hub extending toward said first flywheel and containing said first hub;
• said flywheel assembly further comprising a bearing disposed between said first and second hubs, wherein said second flywheel includes a plurality of sub through-holes bored radially inward of said plurality of through-holes and through inter-perforation portions therebetween, for returning fluid from leakage out of said bearing toward said viscous damping mechanism.