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Torsional Vibration for Crankshaft With Cooling-Fan Drive
Published May 21, 2003 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
A V-type, six-cylinder naturally aspirated diesel engine equipped with a rubber viscous torsional damper and a cooling-fan drive in which silicon oil was filled, was used for measurement and calculation. The silicone oil in the cooling-fan drive was idealized by a complex viscous damping coefficient, in the same way as that in a viscous torsional damper. As a result, the calculated torque on crank-journals agreed with the measured one. Also, the torsional vibrations of a turbocharged engine and those of a naturally aspirated one were calculated, the differences of those for two engines were discussed.