Crankshaft pendulum assembly having kidney-shaped track

摘要

A pendulum crankshaft assembly for an internal combustion engine includes a pendulum carrier, a pendulum and rolling pins. The carrier and the pendulum have kidney-shaped rolling pin tracks. The rolling pin tracks are kidney-shaped and thus are defined by opposed curved side walls and opposed end walls. The pendulum carrier has an ear extending therefrom to which the pendulum is attached. The pendulum comprises a first half and a second half, each half being positioned on the sides of the ear. At any given time in operation, the gap between the rolling pin and the opposed walls of the rolling pin tracks is never greater than 0.5 mm. The pendulum carrier is attached to a cheek of the crankshaft by a pair of opposed fasteners.

主权项

1. A pendulum crankshaft assembly for an internal combustion engine comprising:
a crankshaft having a crankshaft cheek, said cheek having opposed sides; a pendulum carrier having a pair of spaced-apart, vertically-extending arms for attachment to said sides of said cheek; a fastener extending perpendicularly to said crankshaft for attaching said attachment arms to said crankshaft cheek; a pendulum attached to said pendulum carrier; at least one of said carrier and said pendulum having a kidney-shaped track formed therein, said track having a wall; a rolling pin positioned in said track for connecting said pendulum to said carrier; and a gap of less than 0.5 mm formed between said rolling pin and said wall.