Patent ID: 8567367

Claim:
A crankshaft damper and tone wheel assembly for damping vibrations of a crankshaft of an internal combustion engine and indicating a rotational speed or position of the crankshaft, comprising: a crankshaft damper including a hub portion and a ring-shaped portion connected to the hub portion by plural spokes, said ring-shaped portion having an inner circumference surrounding an area including the hub portion and the plural spokes; and an annular-shaped tone wheel connected to the crankshaft damper and having an inner diameter, an outer diameter, plural teeth arranged at an equal pitch along the outer diameter, and a same rotational axis as the crankshaft damper wherein, when viewed along a direction of the rotational axis, the annular-shaped tone wheel does not overlap a substantial amount of the area, and the annular-shaped tone wheel includes at least two openings extending through the annular-shaped tone wheel and positioned radially between the inner diameter and the plural teeth arranged along the outer diameter, the at least two openings being free from structure and sized and positioned to reduce noise radiation.