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目前日趋广泛地采用计算的方法研究汽油机的工作过程。但是在计算一个新的工况点时迄今还不能定量地确定燃烧过程的边界条件如何随工况点在万有特性场中的位置而变化。因此,本文根据试验研究和理论分析提出了一个修正方法—在进行汽油机实际工作过程计算时可以根据点火提前角、过量空气系数、转速和气缸充量的初始状态等参数用这种方法对己知的替代燃烧过程进行修正。这样,就是在负荷和转速变化时也能计算出工作过程的初始压力、温度和残余废气量。计算时引用了包括压缩过程气缸充量状态在内的影响因素这一概念,因此就连进气温度的变化(例如环境条件变化和增压时)对燃烧过程的影响也能予以考虑。
At present, the calculation method is increasingly widely used to study the working process of gasoline engine. However, it has not so far been possible to quantitatively determine how the boundary conditions of the combustion process vary with the position of the operating point in the universal property field when calculating a new operating point. Therefore, based on the experimental research and theoretical analysis, this paper proposes a correction method - this method can be used to calculate the actual work process of gasoline engine based on ignition advance angle, excess air coefficient, rotational speed and the initial state of cylinder charge, The alternative combustion process is amended. In this way, the initial pressure, the temperature and the residual exhaust gas volume of the working process can also be calculated when the load and speed change. The calculation refers to the concept of influencing factors, including the state of charge of the cylinder during the compression process, so that even the effects on the combustion process of changes in intake air temperature (eg during changes in ambient conditions and during supercharging) can be taken into account.