基于韦伯模型的柴油机燃烧控制模型与一维仿真

Diesel Engine Combustion Control Model Based on Wiebe Expression and One-dimensional Simulation

为了实现对高压共轨柴油机燃烧的精确控制,达到节能减排、缸内高效燃烧的目的,采用韦伯方程对高压共轨柴油机试验数据进行分析,利用匹配试验值和计算值的方式确定韦伯方程,根据燃烧效率因数(a)和燃烧品质指数(m)分别初步建立对应的韦伯方程进行计算。并利用一维分析软件,对基于韦伯方程的高压共轨柴油机燃烧过程控制进行仿真试验,所得到的稳态仿真模型试验结果与实验取得的稳态真实试验值进行对比分析和模型校准,结果表明一维模型的准确性良好,可成为实现燃烧过程控制基础。

In order to achieve precise control of the combustion of high-pressure common rail diesel engines,achieve the purpose of energy saving,emission reduction and high-efficiency combustion in the cylinder,the Wiebe expression is used to analyze the experimental data of high-pressure common rail diesel engines.Determine the Wiebe expression by matching test values and calculated values.According to the combustion efficiency factor(a)and combustion quality index(m),the corresponding Wiebe equations are initially established for calculation.The combustion process control of high-pressure common rail diesel engine based on the Wiebe expression is simulated by using one-dimensional analysis software.The steady-state simulation model test results are compared and analyzed with the steady-state real test values obtained in the experiment to calibrate model.The results show that the accuracy of one-dimensional model is great,which can be the basis for realizing the control of the combustion process.