| 基于改进均值模型的汽油机瞬态空燃比控制研究 |
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| 引用本文： | 李顶根,舒咏强,李小中.基于改进均值模型的汽油机瞬态空燃比控制研究[J].车用发动机,2010(1). |
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| 作者姓名： | 李顶根 舒咏强 李小中 |
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| 作者单位： | 华中科技大学能源与动力工程学院,湖北,武汉,430074 |
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| 摘 要： | 结合平均值模型(MVEM)和BP网络的优点,对平均值模型进行改进,将BP网络替代均值模型中经典X-τ油膜模型,对喷油脉宽进行辨识。将改进后的均值模型和原均值模型在SIMULNK中建模,研究结果表明,采用改进后的均值模型,发动机瞬态空燃比最大偏离值和偏离时间明显得到改善,具有精度高、跟踪快速的特点,为基于模型的发动机瞬态工况空燃比的控制提供参考。
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| 关 键 词： | 平均值模型 BP网络 汽油机 空燃比 |
Gasoline Engine Transient Air-fuel Ratio Control Based on Modified MVEM |
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| LI Ding-gen,SHU Yong-qiang,LI Xiao-zhong.Gasoline Engine Transient Air-fuel Ratio Control Based on Modified MVEM[J].Vehicle Engine,2010(1). |
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| Authors: | LI Ding-gen SHU Yong-qiang LI Xiao-zhong |
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| Institution: | School of Energy and Power Engineering;Huazhong University of Science and Technology;Wuhan 430074;China |
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| Abstract: | Combining the advantages of MVEM and BP network,the fuel film model of MVEM was replaced by BP network in order to identify the injection pulse width.The modified MVEM and original MEVM were simulated with the SIMULINK software.The results show that the maximum deviation value and deviation time of transient air-fuel ratio are noticeably improved with the modified MVEM.The modified model has the characteristics of high precision and fast tracing,which provides the reference for controlling the transient air... |
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| Keywords: | MVEM BP network gasoline engine air-fuel ratio |
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