| 摘要 |
A camshaft driving mechanism for driving camshaft wheel members secured to two camshafts in a cylinder head through a power transmitting member mounted between a crankshaft wheel member and the camshaft wheel members; in this driving mechanism, the thickness of the camshaft wheel members is one-half or less of the width of the power transmitting member, one of the camshaft wheel members is offset in an axial direction from the other camshaft wheel member, and the camshaft wheel members partly radially overlap, or one of the camshaft wheel member has a center slit in the axial direction while the other camshaft wheel member fits in the slit.
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