Chain Noise Excitation in Combustion Engines –Numerical Simulation and Verification of Different ChainTypes

摘要

Synchronous belts and chains are the main competitors for timing drives of passenger car engines. Thernexpected lifetime of today's cars and the downward drift of consumer acceptance for longer service downrntime leads to a renaissance of chains. However, chain drives can noticeable contribute to the interior noise,rnwhich has to meet the demand of discerning consumers.rnThis paper presents a comprehensive multi-body dynamics (MBD) model, which takes into account thernentire timing drive as a fully coupled system. After a short summary of the theory, two chain systemsrn(bushing chain and silent chain) are compared by simulated and verified results for the timing drive of arngasoline engine. In the second part the potential of excitation reduction by a novel chain systemrn(SmartChain B.V.) in comparison to the bushing chain and silent chain is shown for a two sprocket drive.