根据世界上的能源危机及对环境保护的要求,为了发挥用于机动车、螺旋浆飞机和固定使用的内燃机的充分潜力,需要生产一种新型的发动机。当前总的趋势是要求缩小发动机尺寸,提高发动机的比重量(功率对重量的比值),降低全负荷和部分负荷时的比油耗,同时要能改进机动车的性能(如易于起动,灵敏度高,宽阔的运行速度范围及对多种燃料的适应性),在热力学原理方面还要求达到可能最高的燃烧温度,最短的燃料燃烧时间,在气体膨胀之前完全的燃烧,最低的热幅射传导,燃气膨胀过程中输出最大的机械功时排气温度最低。机械 In the light of the world’s energy crisis and environmental protection requirements, a new type of engine needs to be developed in order to realize the full potential of motor vehicles, propeller aircraft and fixed-use internal combustion engines. The current general trend is to reduce engine size, increase engine specific weight (power to weight ratio), reduce fuel consumption at full load and part load, and at the same time improve motor vehicle performance (such as ease of starting, high sensitivity, Wide operating speed range and adaptability to a wide range of fuels), the thermodynamic principle is also required to achieve the highest possible combustion temperature, the shortest fuel burn time, complete combustion before gas expansion, lowest thermal radiant conduction, gas Exhaust temperature is lowest when outputting the largest mechanical work during expansion. mechanical