柴油机在低负荷运转时,缸内腐蚀介质露点温度的下降会对缸套产生损害。为讨论露点温度的下降对燃烧始点的依赖关系,以MTU956型增压发动机为例,计算了其缸壁温度及纯水蒸汽的露点温度。在低负荷时,随着燃烧始点的提前,由于露点温度的降低,则缸套被损害的危险性增加,尤其是缸套上部。而当燃烧始点由上止点 Diesel engine at low load operation, the degradation of the cylinder corrosion medium dew point temperature will damage the cylinder liner. In order to discuss the dependence of dew point temperature on the starting point of combustion, the cylinder wall temperature and the dew point temperature of pure water vapor were calculated with MTU956 supercharged engine as an example. At low load, with the early start of combustion, the risk of damage to the liner increases due to the dew point temperature, especially in the upper part of the liner. And when the starting point of combustion from the top dead center