The principal performance and structural features of the D2156HM6U diesel engines installed on the Hungarian IKARUS 256 buses are presented in this paper, meanwhile, the causes and preventing measures of the prema- ture cylinder wear are analysed as well.

• 介绍了匈牙利依卡路斯256型客车装用的D2156HM6U型柴油机主要性能、结构特点、气缸早期磨损的原因及预防措施。