比功率的不断提高标志着现代柴油机制造的发展水平。这就要求在设计阶段、实验研究过程中以及在长期试验和使用中特别注意对柴油机零件热负荷强化度的评价。 因为柴油机,特别是运输式柴油机经常被迫在寒冷地带、炎热的沙漠地区和高山地区工作,处于进气空气极其稀薄(如因空气滤清器堵塞)和过高的排气背压的条件下,因而需要判断柴油机零件在使用条件下的热负荷强化度,总之,所有这些因素将导致气缸空气的质量充量改变,工作过程的动力特性改变,并使柴油机零件的热负荷强化度增高。其结果使柴油 Than the continuous improvement of power marks the development of modern diesel engine manufacturing level. This requires special attention in the design phase, experimental research and long-term testing and use of diesel engine parts thermal load enhancement evaluation. Because diesel engines, and especially transport diesel engines, are often forced to work in cold regions, hot desert regions and high mountains, at extremely lean intake air (eg, clogged with air filters) and with excessive exhaust back pressure Therefore, it is necessary to judge the thermal load intensification of diesel engine parts under the conditions of use. All these factors will lead to the change of the mass charge of the cylinder air, the change of the dynamic characteristics of the working process and the increase of the thermal load enhancement of the diesel engine parts. The result is diesel