A BELT DRIVE WITH A FRICTION WHEEL

摘要

Belt drive (1) comprising a crankshaft pulley (4), an accessory pulley (6), a transmission belt (9) wound on the crankshaft pulley (4), an accessory pulley (6), a water pump friction pulley (14) and a friction wheel (17) having a friction surface (19) co-operating with the friction pulley (14) and a back (20) of the transmission belt (9) at a section of the belt (9) that is wound around the crankshaft pulley (4); the friction wheel (17) is made of metal and has a knurled friction surface (19), the friction pulley (14) comprises a soft friction annulus (25) with the friction surface (19) of the friction wheel (17).