Air-cooled flywheel and a friction clutch for a transmission of a motor vehicle, the flywheel having two centrifugal masses

An internal combustion engine flywheel, said internal combustion engine flywheel comprising:

• a two-mass flywheel, said two-mass flywheel being rotatable about an axis of rotation and defining an axial direction parallel to the axis of rotation;
• said two-mass flywheel comprising:
• a first flywheel mass and a second flywheel mass disposed adjacent one another;
• said first flywheel mass comprising means for non-rotationally connecting said first flywheel mass to a crankshaft of an internal combustion engine;
• damping means for transmitting rotational torque from said first flywheel mass to said second flywheel mass, for rotating said second flywheel mass with said first flywheel mass;
• said second flywheel mass comprising a first part and a second part;
• said first part comprising a plurality of areas for being connected to said second part;
• said second part comprising a plurality of areas for being connected to said first part;
• said areas of said first part and said areas of said second part together forming a plurality of connection areas wherein said first part and said second part are connected to one another;
• a plurality of connecting elements for connecting said first part and said second part to one another, each of said connecting elements being disposed at a corresponding one of said plurality of connection areas;
• means for permitting air to flow between said first part and said second part for cooling at least said first part and said second part, said means for permitting being disposed adjacent said plurality of connection areas;
• said means for permitting comprising means for holding said first part and said second part in a spaced-apart relationship with respect to one another;
• said means for permitting further comprising a plurality of passage means, said plurality of passage means extending in a substantially radial direction with respect to the axis of rotation;
• each of said plurality of passage means being disposed circumferentially between two adjacent ones of said plurality of connection areas;
• said second flywheel mass comprising means for being connected to a friction clutch;
• said second part of said second flywheel mass comprising a friction surface for being disposed towards a friction clutch and for engaging with a friction clutch;
• said first part of said second flywheel mass comprising an inner circumference and an outer circumference, said inner circumference being disposed nearer to the axis of rotation than said outer circumference;
• a bearing disposed adjacent said inner circumference of said first part;
• said inner circumference of said first part of said second flywheel mass comprising a flange disposed substantially parallel with respect to the axis of rotation and disposed radially inside said connecting elements, said flange extending from said first part towards said second part;
• said flange comprising a shoulder being configured for fixing said bearing in the radial direction;
• and
• said flange comprising an edge portion extending from said flange towards the axis of rotation, said edge portion being configured for fixing said bearing in the axial direction.