| 摘要 |
A belt transmission apparatus capable of changing a tension of a belt by the action of belt tension adjuster 9, 30 from a first optimal value of higher tension suitable for the starting of engine 1 to a second optimal value of lower tension suitable for driving an accessory after engine 1 has been started. The belt transmission apparatus includes a rotating electric machine pulley 8 of a rotating electric machine for transmitting starting power to engine 1 ; engine pulley 2 for transmitting starting power to engine 1 and rotation power of engine 1 to accessories; auxiliary pulleys 3, 4, 5 rotated by the power from engine pulley 2 to drive the accessories belt 10 wrapped around rotating electric machine pulley 8 , engine pulley 2 and auxiliary pulleys 3, 4, 5 : and belt tension adjuster 9, 30 for urging belt 10 to set tension in a plurality of stages.
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