| 摘要 |
<p>For use in determination of chain transmitted power between a pedal driven sprocket (104) and a cycle rear wheel, the combination comprises a tensioned chain (10) having a succession of links (11, 12) with undulating edges (11a, 12a). An idler (20, 40) supported to be driven in rotation by the chain has an undulating perimeter surface. Certain of the chain undulating edges engage portions of the idler undulating perimeter surfaces, whereby the chain changes direction as it travels lengthwise relative to the idler and rotatably drives the idler. A motor (108) delivers power to the rear wheel of the cycle as a function of power determined in the tensioned chain.</p> |
