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废气涡轮增压器与发动机的配合模拟计算包括三大部分:①发动机气缸内工作过程计算;②进排气管系内流动过程计算;③涡轮增压器的功率平衡计算。利用上述计算,可以将发动机的结构参数、运行工况、环境条件与其综合性能指标联系起来,并揭示其内在规律。通常这一计算也可称为发动机工作过程模拟计算,但往往是把重点放在缸内工作过程计算上,而对管系的流动过程则用容积法来予以简化。在这里,我们把重点放在考察增压系统结构参数对发动机性能指标以及配合运行线位置的影响。因此对管系内不稳定流动过程用较复杂的特征线法来计算。这样一来,管系流动计算反倒构成了程序的主体,而缸内工作过程计算则是在一个子程序内完成,这是和通常的计算不同的地方。将这一程序简称为PJ程序(配机二字的汉语拼音缩写),并在300系列发动机上进行了初步的校核与应用。
Exhaust gas turbocharger and engine with the simulation includes three major parts: ① engine cylinder working process calculation; ② into the exhaust pipe flow calculation process; ③ turbocharger power balance calculation. Using the above calculation, the structural parameters of the engine, operating conditions, environmental conditions and its comprehensive performance indicators linked to reveal its inherent laws. Usually this calculation can also be called engine working process simulation calculation, but often focus on the calculation of in-cylinder working process, while the piping flow process is to use volumetric method to be simplified. Here, we focus on investigating the impact of the structural parameters of the booster system on engine performance and the location of the tie line. Therefore, the instability of the flow within the piping system using more complex method of characteristic line to calculate. As a result, pipe flow calculations constitute the main body of the program, and in-cylinder work process calculations are completed within a subroutine, which is different from the usual calculation. This program is abbreviated as PJ program (abbreviation of Hanyu Pinyin with machine word), and preliminary check and application are performed on 300 series engine.