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Multi-Body Dynamics Simulation of Valve Train and Timing Chain Drive
Published September 28, 2005 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Recently timing chain is used for the camshaft in many car engines for durability purpose. The timing chain tension, however, may fluctuate due to driving torque of the camshaft, torsional vibration of the crankshaft, characteristics of the auto tensioner, etc., and increase chain noise; it may result in breakage of the chain and cam nose. To prevent these problems, a multi-body dynamics simulation model of the timing chain and valve train was developed. There was a good correlation between analytical results and experimental results. This model also showed that the chain tension might be excessively high due to camshaft driving torque, which is caused by camshaft resonance.