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Harmonic balancers, vibration dampeners or torsional dampener are used on an engine to stop or disrupt a vibration caused by the crankshaft. The vibrations give off a harmonic frequency and the harmonic balancer, made of both rubber and metal, is tuned to cancel out those frequencies, specifically. Since the crankshaft has to twist every time it rotates, its gives off a harmonic frequency, and the harmonic balancer helps to control that twist and the vibration. The harmonic balancer serves a second purpose, as well. It helps the engine by adding weight to the front of the engine, which allows it to runner smoother.
|Jennifer Mathes, Ph.D.|