MULTIPLE-DISC COUPLING DEVICE, AUTOMATIC TRANSMISSION PROVIDED THEREWITH, AND METHOD FOR MAKING SAME.

摘要

A coupling device such as a clutch including first hardened steel discs (22) with teeth (25) for rotationally engaging a first clutch member, said first discs being alternated with second discs (19) with teeth (15) for rotationally engaging a second clutch member. The second discs (19) are made of carbon fibres embedded in a carbon matrix and have no internal reinforcement. The device is useful for improving clutch stability and smooth clutch engagement and enhancing the durability of the discs.