吉林大学学报(工学版) ›› 2025, Vol. 55 ›› Issue (9): 2837-2846.doi: 10.13229/j.cnki.jdxbgxb.20250361

• 车辆工程·机械工程 • 上一篇    

基于自适应观测器的氢内燃机排气流量估计

孙鹏远1(),陈国栋1,张慧峰1,陈伟轩1,刘帅2   

  1. 1.中国第一汽车集团有限公司 研发总院,长春 130011
    2.吉林大学 通信工程学院,长春 130022
  • 收稿日期:2025-03-12 出版日期:2025-09-01 发布日期:2025-11-14
  • 作者简介:孙鹏远(1974-),男,正高级工程师,博士.研究方向:发动机电控系统开发.E-mail:sunpengyuan@faw.com.cn
  • 基金资助:
    吉林省科技发展计划项目(20240301005ZD)

Adaptive observer⁃based estimation of exhaust gas flow in hydrogen internal combustion engines

Peng-yuan SUN1(),Guo-dong CHEN1,Hui-feng ZHANG1,Wei-xuan CHEN1,Shuai LIU2   

  1. 1.General Reasearch and Development Institute,China FAW Group Co. ,Ltd. ,Changchun 130011,China
    2.College of Communication Engineering,Jilin University,Changchun 130022,China
  • Received:2025-03-12 Online:2025-09-01 Published:2025-11-14

摘要:

为了精准实时估计内燃机的废气质量流量,提出了一种基于自适应观测器的氢内燃机排气流量估计方法。该方法结合速度密度公式,通过实时自适应估计关键待辨识参数——排气效率,估计内燃机排气流量。首先,根据排气歧管处压强动态模型和排气口处废气质量流量模型建立排气模型;为兼顾信号采集精度与计算资源效率,对建立的排气模型进行离散化处理。其次,设计自适应状态观测器,对其参数进行调整,以确保性能和收敛性。最后,通过自适应观测器估计待辨识参数——排气效率,并根据废气速度密度公式计算得出气缸的废气流量。GT-SUITE与Simulink联合仿真结果表明,本文方法在稳态和瞬态工作过程中均具有良好的性能表现。

关键词: 控制理论与控制工程, 氢内燃机, 对置活塞二冲程内燃机, 废气流量估计, 自适应观测器

Abstract:

To enable accurate and real-time estimation of exhaust mass flow rate in internal combustion engines, a hydrogen internal combustion engine exhaust flow estimation method based on adaptive observer was proposed. By combining the velocity density formula, the exhaust efficiency of the internal combustion engine was estimated through real-time adaptive estimation of key parameters to be identified. Firstly, an exhaust model was established based on the pressure dynamics model at the exhaust manifold and the mass flow model of exhaust gas at the exhaust outlet. To balance signal acquisition accuracy and computational resource efficiency, the established exhaust model was discretized. Then, an adaptive state observer was designed, and its parameters were adjusted to ensure performance and convergence. Finally, the exhaust efficiency of the parameter to be identified was estimated through an adaptive observer, and the exhaust gas flow rate of the cylinder was calculated based on the exhaust gas velocity density formula. The co-simulation results using GT-SUITE and Simulink demonstrate that the proposed method exhibits good performance in both steady-state and transient operating conditions.

Key words: control theory and control engineering, hydrogen internal combustion engine, opposed-piston two-stroke engine, exhaust gas flow estimation, adaptive observer

中图分类号: 

  • TP273

图1

内燃机进排气系统结构图"

图2

基于自适应观测器的排气量估计方法结构框图"

图3

OP2S氢内燃机等效模型"

表1

内燃机参数"

参数数值

气缸直径/mm

活塞行程/mm

119

175

排气歧管长度/mm

最大工作容积/L

90

2.12

压缩比

进气歧管直径/mm

进气歧管长度/mm

排气歧管直径/mm

12

55

140

52

内燃机排量/L

缸径/mm

冲程

喷射器输送速率/(g·s-1

1.95

119

2

30

图4

充气效率仿真结果"

图5

进气流量仿真结果"

图6

质量误差仿真结果"

图7

排气压强仿真结果"

图8

排气效率仿真结果"

图9

排气流量仿真结果"

图10

排气质量误差仿真结果"

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