In order to study the effect of new sprocket for timing roller chain drive

dynamic simulations are carried out respectively about four timing roller chain drive systems in which four sprockets are exploited respectively such as ISO-606 sprocket

JIS-B1802 sprocket

GB/T-1243 sprocket

nonstandard sprocket which is formed by modifying the tooth profile of GB/T-1243 sprocket.And a comparison is made about the simulation results.Study shows that drive system using nonstandard sprocket is improved in many ways such as chain tension

contact force and friction force between chain and drive component

tensioned force

and angular velocity of camshaft sprocket.So by applying the nonstandard sprocket

the carrying capacity of the chain is increased

the power situation of the system is improved

transmission efficiency is improved

system life is extended

engagement impact is reduced

noise is reduced and polygonal effect is improved.