吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (06): 1574-1580.doi: 10.7964/jdxbgxb201306023

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基于输入观测器的分缸空燃比估计

王萍1, 江和耀2, 范亚南1, 陈虹1   

  1. 1. 吉林大学 通信工程学院, 长春 130022;
    2. 中国船舶重工集团公司 第七一三研究所, 郑州 450015
  • 收稿日期:2012-10-19 出版日期:2013-11-01 发布日期:2013-11-01
  • 通讯作者: 陈虹(1963-),女,教授,博士生导师.研究方向:预测控制,鲁棒控制及非线性控制的理论与应用.E-mail:chenh@jlu.edu.cn E-mail:chenh@jlu.edu.cn
  • 作者简介:王萍(1982-),女,讲师,博士.研究方向:预测控制,发动机控制.E-mail:wangping12@jlu.edu.cn
  • 基金资助:

    国家自然科学基金重点项目(61034001);教育部"长江学者和创新团队发展计划"创新团队项目(ITR1017).

Individual cylinder air-fuel ratio estimation based on input observer

WANG Ping1, JIANG He-yao2, FAN Ya-nan1, CHEN Hong1   

  1. 1. College of Communication Engineering, Jilin University, Changchun 130022, China;
    2. The 713th Research Institute of China Shipbuilding Industry Corporation, Zhengzhou 450015, China
  • Received:2012-10-19 Online:2013-11-01 Published:2013-11-01

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摘要：

针对进气道喷射发动机, 为了实现更加精确的空燃比(Air-fuel ratio, AFR)控制, 提出了基于输入观测器的分缸空燃比估计方法。首先建立发动机的完整油路模型, 主要包括燃油传输模型、气体(废气)混合过程模型、废气传输模型和氧传感器模型, 并基于发动机仿真软件enDYNA对其进行校验。然后设计了输入观测器来估计各缸内的空燃比, 并利用区域极点配置方法确定观测器的增益。最后通过离线仿真和发动机控制试验台架上的实时仿真验证了观测器的合理性和有效性。

关键词: 控制理论, 分缸空燃比, 油路模型, 输入观测器, 区域极点配置

Abstract:

Based on the input observer, an estimator of individual cylinder Air-Fuel Ratio (AFR) in a SI engine is proposed. The fuel path model, which is constituted by fuel wall-wetting model, exhaust gas mix model, exhaust gas transfer model and universal exhaust gas oxygen (UEGO) sensor model, is established. Then, under the same working condition and with the same input, the developed model is validated using the precise engine model of enDYNA. Furthermore, an input observer based on regional pole placement is proposed to design an AFR estimator. Finally, the rationality and feasibility of the proposed observer and AFR estimator are validated by real-time and offline simulations on a simulation platform for automotive engine control.

Key words: control theory, individual cylinder air-fuel ratio, fuel path model, input-observer, regional pole placement

中图分类号: 

  • TP273

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