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Transient Control of Combustion Phasing and Lambda in a 6- Cylinder Port-Injected Natural-gas Engine

机译：六缸进气口天然气发动机燃烧阶段和λ的瞬态控制

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摘要

Fuel economy and emissions are the two central parameters in heavy duty engines. High EGR rates combined with turbocharging has been identified as a promising way to increase the maximum load and efficiency of heavy duty spark ignition engines. With stoichiometric conditions a three way catalyst can be used which keeps the regulated emissions at very low levels. The Lambda window which results in very low emissions is very narrow. This issue is more complex with transient operation resulting in losing brake efficiency and also catalyst converting efficiency.rnThis paper presents different control strategies to maximize the reliability for maintaining efficiency and emissions levels under transient conditions. Different controllers are developed and tested successfully on a heavy duty 6-cylinder port injected natural gas engine. Model Predictive Control (MPC) was used to control lambda which was modeled using System Identification. Furthermore, a Proportional Integral (PI) regulator combined with a feedforward map for obtaining Maximum Brake Torque (MBT) timing was applied. The results show that excellent steady-state and transient performance can be achieved.
机译：燃油经济性和排放是重型发动机的两个主要参数。高EGR率与涡轮增压相结合已被认为是增加重型火花点火发动机最大负载和效率的有前途的方法。在化学计量条件下，可以使用三效催化剂，将调节的排放量保持在非常低的水平。导致非常低排放的Lambda窗口非常狭窄。这个问题在瞬态运行中更加复杂，导致制动效率和催化剂转化效率的下降。本文提出了不同的控制策略，以最大化在瞬态条件下保持效率和排放水平的可靠性。在重型6缸进气口天然气发动机上成功开发并测试了各种控制器。使用模型预测控制（MPC）来控制lambda，该lambda是使用“系统标识”建模的。此外，还应用了比例积分（PI）调节器与前馈图相结合以获得最大制动扭矩（MBT）正时。结果表明，可以获得出色的稳态和瞬态性能。

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  • 来源
    《》|2009年|P.655-662|共8页
  • 会议地点 Milwaukee WI(US);Milwaukee WI(US)
  • 作者

    Mehrzad Kaiadi; Magnus Lewander; Patrick Borgqvist; Per Tunestal; Bengt Johansson;

  • 作者单位

    Division of Combustion Engines, Lund University, Faculty of Engineering;

    rnDivision of Combustion Engines, Lund University, Faculty of Engineering;

    rnDivision of Combustion Engines, Lund University, Faculty of Engineering;

    rnDivision of Combustion Engines, Lund University, Faculty of Engineering;

    rnDivision of Combustion Engines, Lund University, Faculty of Engineering;

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  • 正文语种 eng
  • 中图分类 内燃机;
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