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十、燃烧过程的概述柴油机经济地工作的最重要条件之一就是适时喷入燃料并完全燃烧。因此,为更好地解决柴油机工作的经济性问题,设计师就必须对燃烧过程进行了解。但燃烧过程恰是柴油机工作循环中一向最少被研究的一环。其原因在于混合气形成过程与燃烧过程连结在一起,并且在这过程中有许多化学和物理参数影响着工作循环的各个过程。因此在运转的发动机中,各个工作过程极难、甚至是无法观察的。利用模型试验(如容弹)能得出一些参数的单独影响;从理论的观点来看,这样的一些结果是很有用的。可惜由于实验条件的不同,这些结果有时无法应用到实际发动机中去。当然,人们将会去进行尝试,在模型设计时尽可能确切地去摸拟实际发动机的运行条件。有关混合气的形成,燃料的雾化及燃烧过程的观点在发展过程中已有很大的变化。R.Diesel本人及其同时代的研究者认为雾化过程先于着火,并认为火焰在燃料空气混合气中扩散。后来,O.Alt和K.Neumann断言雾化
Ten, an overview of the combustion process One of the most important conditions for a diesel engine to work economically is the timely injection of fuel and complete combustion. Therefore, in order to better solve the economic problem of diesel engine work, designers must understand the combustion process. But the combustion process is exactly one of the least studied aspects of the diesel engine working cycle. The reason for this is that the process of mixture formation is linked to the combustion process, and there are many chemical and physical parameters that influence the various processes of the working cycle. Therefore, in the running engine, each working process is extremely difficult or even unobservable. The use of model tests (such as shots) can yield the individual effects of some parameters; from a theoretical point of view, such results are useful. Unfortunately, due to the different experimental conditions, these results sometimes can not be applied to the actual engine. Of course, people are going to try and try to model the actual engine operating conditions as accurately as possible during model design. The idea of the formation of gas mixtures, the atomization of fuel, and the combustion process has changed dramatically in the development. R. Diesel himself and his contemporaries believe the atomization process precedes ignition and considers the flame to diffuse in the fuel-air mixture. Later, O. Alt and K. Neumann asserted atomization