A new timing chain with no chordal action

Chain drives in internal combustion engines frequently induce a disturbing noise, so-called whine noise. Basically, this noise is caused by the chordal action or polygon effect that originates from the periodically changing effective radius of the sprockets. In this article, SmartChain B.V. presents a new roller chain or bushing chain that entirely avoids the disturbing polygon effect. The concept was evaluated by AVL List GmbH, using the multibody dynamics software Tycon.