在过去一、二十年中,发动机的性能有了显著的提高,特别是增压技术在柴油机上的广泛使用,使柴油机的功率与经济指标有了很大的提高,但也大大地增加了柴油机的机械负荷和热负荷。随着充气压力的提高,进入气缸内的燃料量增加,发动机缸内总散热量也相应增加。因此,发动机中的受热零件(主要是组成发动机燃烧室周围的那些零件)的热负荷有所增加。 In the past one or two decades, the engine performance has been significantly improved, especially the booster technology widely used in diesel engines, the diesel engine power and economic indicators have been greatly improved, but also greatly increased Diesel mechanical and thermal loads. As the inflation pressure increases, the amount of fuel entering the cylinder increases and the total heat dissipation in the engine cylinder increases accordingly. As a result, the heat load on the heated parts of the engine, primarily those that make up the periphery of the combustion chamber of the engine, has increased.