摘要
以下问题是较为常见的。在发动机燃烧期间，活塞发动机会产生无益的曲轴扭转振动，进而干扰整个动力系统的．运行。采用柴油发动机的车辆尤其如此。对这种“有害振打，甚至可以量化表示。机轴扭转振动的振幅大约为30％。
We are all familiar with the problems. During combustion, piston engines produce undesirable torsional crankshaft vibrations that irritate the entire powertrain. This is particularly true in diesel vehicles The ＂bad vibrations＂ can even be expressed in numbers. The amplitude of the crankshaft＇s torsional vibration is roughly 30 per cent.
