基于信任区域反射算法 (TRRA) 和柴油氧化催化剂 (DOC) 物理模型的碳化合物减速器 (HC) 注射的最佳控制
Wenlong Liu1, Ying Gao1, Yuelin You1
1State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China; College of Automotive Engineering, Jilin University, Changchun 130025, China.
优化向柴油氧化催化剂 (DOC) 注入碳化合物,精确控制其出气温度,以实现柴油颗粒过器 (DPF) 的活性再生. 这种方法确保了有效和准确的DFF清洁.
科学领域:
- 汽车工程 汽车工程
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 柴油发动机需要有效的排放控制系统,包括柴油氧化催化剂 (DOC) 和柴油颗粒过器 (DPF).
- DPF的积极再生需要精确控制DOC输出气体温度,以优化性能和防止损坏.
- 碳化合物 (HC) 注入是影响活性再生过程中DOC温度的关键因素.
研究的目的:
- 开发和验证一个控制策略,以保持DOC出口气体温度在狭窄的范围内 (600±15°C).
- 优化碳化合物 (HC) 注入,以有效地活性再生下游柴油颗粒过器 (DPF).
主要方法:
- 开发了DOC热力学简化的物理模型,使用TR-BDF2方法解决节能方程.
- 用高斯-牛顿法优化模型参数,以提高计算效率和准确性.
- 设计了一个DOC下游温度观察器,使用无气味卡尔曼波器 (UKF) 算法.
主要成果:
- TR-BDF2方法和高斯-牛顿优化显著提高了DOC热模型的计算效率和准确性.
- 总部位于UKF的观察员在稳定状态和过渡条件下 (WHTC周期) 准确估计了DOC温度.
- 成功控制HC注入使DOC输出温度保持在600±15°C,实现了DPF再生的目标.
结论:
- 拟议的模型和观察器为精确的DOC温度控制提供了一种可靠的方法.
- 优化的HC注入策略有效支持活跃的DPF再生,增强柴油发动机排放控制.
- 这项研究为先进的柴油排放后处理系统提供了宝贵的理论和实践见解.
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