| 摘要 |
A pedaling assistance device for a light vehicle, in particular a bicycle, equipped with pedals and a ratio-changing transmission, this device comprising a heat engine (1; 101; 201) equipped with a reducing gear mechanically coupled with an element (26, 46; 146; 227) receiving muscular pedaling power from a user of the light vehicle, the mechanical coupling being effected upstream of said ratio-changing transmission in such a way that the heat engine benefits from said changes of ratios, characterized in that the reducing gear of the heat engine includes a first belt-based reduction stage (6; 286).
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