| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a camshaft driving device which can ensure stable damping performance without being influenced by the secular change (deterioration) of a damper. SOLUTION: In this camshaft driving device, dynamic dampers 12a, 12b which are respectively set to different natural frequencies (X, Z) so as to reach a peak in a rotational range holding a peak rotational speed (M) that a belt load reaches a peak, are arranged on two camshafts 4a, 4b to which power is transmitted through a timing belt 6 and cam sprockets 5a, 5b. Then, a structure to damp rotational fluctuation produced in an engine speed zone including the peak rotational speed (M) by the synergism of both damper functions, is employed thereby, favorable damping action can be retained around the peak rotational speed (M) regardless of such a state that even though rubber bodies 13 are changed with the lapse of time and the natural frequencies of the dynamic dampers 12, 12b are shifted from each other.</p> |
