首页> 外文会议>American Control Conference >Reliable reference determination for diesel engine emission control
【24h】

Reliable reference determination for diesel engine emission control

机译:柴油发动机排放控制的可靠参考测定

获取原文

摘要

To meet the current and upcoming emission legislation, engine air system control is a crucial aspect. To this end different approaches from SISO control in combination with feedforward structures up to advanced MIMO strategies are proposed in the literature. However, for each control strategy a reference quantity is necessary. Although it seems sensible to directly use the exhaust emission concentrations in a closed loop control, unfortunately a fast and accurate online measurement is seldom available. A typical approach to circumvent this issue is to use auxiliary quantities like fresh air mass flow, whereas the according reference values for these quantities are obtained during engine development. This paper presents a different approach where not only one but a combination of different candidates is used to define an optimal reference for the EGR valve control. The target for the overall control is to maintain a constant nitric oxides (NOx) level during steady state operation without explicit NOx measurement. Furthermore, a scheduling method is proposed to take into account the expected errors on the sensor signals depending on the current operating region. Finally the control was applied on a mean value engine simulation model and showed satisfactory results.
机译:为满足当前和即将到来的排放立法,发动机空气系统控制是一个至关重要的方面。为此,在文献中提出了与馈电结构的不同方法,与前馈结构的馈电结构相结合。但是,对于每个控制策略,参考数量是必要的。虽然直接在闭环控制中直接使用废气发射浓度似乎是明智的,但遗憾的是,很快就可以提供快速准确的在线测量。规避本问题的典型方法是使用辅助量,如新鲜空气质量流量,而在发动机开发期间获得这些量的基值的参考值。本文介绍了一种不同的方法,不仅是一个,而且使用不同候选者的组合来定义EGR阀控制的最佳参考。整体控制的目标是在稳态操作期间维持恒定的一氧化氮(NOx)水平,而无明确的NOx测量。此外,提出了一种调度方法,以考虑根据当前操作区域的传感器信号上的预期误差。最后,对平均值发动机仿真模型应用了控制,并显示出令人满意的结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号