Analysis Of The Torsion Vibration Of The Vehicle Powertrain With The Dual-mass Flywheel

Automotive powertrain is very complex one that includes a multi-freedom and torsion system. So it is always focus that researching of automotive powertrain and controlling of NVH(noise,vibration and harass) in auto engineer. Nowadays, Modern engines can be driven at extremely low rpms. The trend is toward ever increasing engine torques. New calculation methods are helping reduce vehicle weights and weight-saving concepts are boosting engine efficiency as well.. In short: The sources of noise are increasing and natural damping is decreasing. Most of these come from automotive powertrain, which must degree drive comfort. Drivers who are accustomed to increased comfort no longer accept such background noises. The dual-mass flywheel is designed to absorb engine vibrations before they are transmitted to the driveline where they can create gear rattle. This is achieved by splitting the conventional flywheel into two sections: a primary section, which bolts to the crankshaft, and a secondary section, onto which the clutch is bolted. The dual-mass flywheel have multi-charater, not only conventional character but also to absorb engine vibrations and degree range of vibration. In no.1 part of this paper, the advantage and disadvantage of the dual-mass flywheel is discussed. And controlling ways of automotive powertrain noise and vibration is introduced in detail. At the same time ,classic structures of the dual-mass flywheel are particularized.