Quantitative study on in-cylinder combustion and heat release characteristic parameters of gasoline engine based on single variable sweeping tests
Quantitative study on in-cylinder combustion and heat release characteristic parameters of gasoline engine based on single variable sweeping tests
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DOI：
10.1016/j.applthermaleng.2017.02.059
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发表时间：
2017-05
影响因子：
6.4
通讯作者：
Jing-ping Liu;Guohui Zhu;Jianqin Fu;Zhengxin Xu;Jun Yao;Zhangsong Zhan
中科院分区：
文献类型：
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作者：
Jing-ping Liu;Guohui Zhu;Jianqin Fu;Zhengxin Xu;Jun Yao;Zhangsong Zhan
在一台开放式电控单元（ECU）专用试验机上，进行了汽油机缸内燃烧放热过程影响因素的单变量扫频试验。通过对试验数据的二次开发，对预混燃烧过程的三个阶段的特征参数进行了定量研究，总结出了其共同规律。在此基础上，推导了燃烧特性参数的半经验模型，得到了燃烧特性参数与发动机转速、负荷、点火提前角、过量空气系数等工作参数之间的定量关系，建成了将所提出的半经验模型应用于其它发动机，结果表明该模型具有较好的精度和可靠性。过量空气系数、RGF、负荷和进气滚流对燃烧速率的影响主要体现在SA（火花提前）-10%燃烧持续期而不是10-90%燃烧持续期，火花提前角对SA-50%燃烧持续期的影响很小。总结出的一般规律和提出的半经验模型可用于预测发动机的燃烧特性参数，对发动机缸内工作过程的模拟和优化，尤其是在设计和开发阶段具有重要的指导意义。
The single variable sweeping tests about the influence factors of in-cylinder combustion and heat release processes of gasoline engine were carried out based on a special test engine with open electronic control unit (ECU). Through secondary development on tested data, the characteristic parameters of three stages of premixed combustion processes were quantitatively studied and the common rules were summarized. On this basis, the semi-empirical models for combustion characteristic parameters were derived, and the quantitative relations between combustion characteristic parameters and engine operating parameters, including speed, load, spark advance angle and excess air coefficient, etc., have been built. Furthermore, the proposed semi-empirical models were applied to other engines, which were proved to be of satisfactory accuracy and reliability. The effects of excess air coefficient, RGF, load and intake tumble on combustion rate are mainly reflected in SA (spark advance)-10% combustion duration rather than 10–90% combustion duration, and the spark advance angle has little influence on SA-50% combustion duration. The summarized common rules and the proposed semi-empirical models can be used to predict the combustion characteristic parameters of engine, which is helpful for simulating and optimizing the in-cylinder working process of engine especially in design and development stage.