| 摘要 |
The system includes at least one transmission belt (7, 7a, 7b) for coupling the shafts (5a, 6a) of auxiliary devices (5, 6) to a pulley (8) which can be coupled for operation to the shaft (2) of the combustion engine (3), and an electromagnetically operated clutch (9, 10) between this pulley (8) and the shaft (2) of the engine (3). <??>An overrunning clutch (11) is interposed between the pulley (8) and the shaft (2) of the engine (3). The clutch (9) is normally disengaged and de-energized. <??>The pulley (8) has a hub (8a) fitted on an extension (2a; 31) of the shaft (2) of the engine (3) with the interposition of the overrunning clutch (11), and has a channel-shaped cross section with a concavity (8b) facing the internal combustion engine (3). The electromagnetically operated clutch (9) comprises a winding (10) which is fixed to the engine (3) and which extends into the concavity (8b) of the pulley (8), and a ferromagnetic ring (18) carried in an axially translatable way by a support element (19) fixed with respect to rotation to the extension (2a; 31) of the shaft (2) of the engine (3). <IMAGE> |
