| 摘要 |
An improved degree wheel device includes a degree wheel which is adjustably rotatable relative to the crankshaft on which it is carried. The wheel can be easily adjusted so that a zero degree reading corresponds to top dead center of piston travel. Much of the calculation necessary to determine cam phasing, cam lobe centerline, valve overlap, and the like is thereby eliminated. The degree wheel preferably includes counterclockwise 0 DEG to 360 DEG indicia for a direct and calculation-free determination of the duration of tappet lift.
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