The structure and operational principle of dual mass flywheel are discussed

and torsional vibration of the speed gearbox input shaft is analysed. Then

the engine crankshaft train simulation model is established based on Excite

and at the same time

the simulation analysis is carried out. At last

simulation and test results show that the dual mass flywheel not only could effectively decrease speed irregularity of gearbox input shaft

but also promote vehicle comfort and reduce crankshaft torsional vibration.