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Data-Driven Air-Fuel Path Control Design for Robust RCCI Engine Operation

Author

Listed:
  • Jan Verhaegh

    (Powertrains Department, TNO Automotive, 5700 AT Helmond, The Netherlands)

  • Frank Kupper

    (Powertrains Department, TNO Automotive, 5700 AT Helmond, The Netherlands)

  • Frank Willems

    (Powertrains Department, TNO Automotive, 5700 AT Helmond, The Netherlands
    Control Systems Technology, Department of Mechanical Engineering, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands)

Abstract

Reactivity controlled compression ignition (RCCI) is a highly efficient and clean combustion concept, which enables the use of a wide range of renewable fuels. Consequently, this promising dual fuel combustion concept is of great interest for realizing climate neutral future transport. RCCI is very sensitive for operating conditions and requires advanced control strategies to guarantee stable and safe operation. For real-world RCCI implementation, we face control challenges related to transients and varying ambient conditions. Currently, a multivariable air–fuel path controller that can guarantee robust RCCI engine operation is lacking. In this work, we present a RCCI engine controller, which combines static decoupling and a diagonal MIMO feedback controller. For control design, a frequency domain-based approach is presented, which explicitly deals with cylinder-to-cylinder variations using data-driven, cylinder-individual combustion models. This approach enables a systematic trade-off between fast and robust performance and gives clear design criteria for stable operation. The performance of the developed multivariable engine controller is demonstrated on a six-cylinder diesel-E85 RCCI engine. From experimental results, it is concluded that the RCCI engine controller accurately tracks the five desired combustion and air path parameters, simultaneously. For the studied transient cycle, this results in 12.8% reduction in NO x emissions and peak in-cylinder pressure rise rates are reduced by 3.8 bar/deg CA. Compared to open-loop control, the stable and safe operating range is increased from 25 ° C up to 35 ° C intake manifold temperature and maximal load range is increased by 14.7% up to BMEP = 14.8 bar.

Suggested Citation

  • Jan Verhaegh & Frank Kupper & Frank Willems, 2022. "Data-Driven Air-Fuel Path Control Design for Robust RCCI Engine Operation," Energies, MDPI, vol. 15(6), pages 1-25, March.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:6:p:2018-:d:768211
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    References listed on IDEAS

    as
    1. Paykani, Amin & Garcia, Antonio & Shahbakhti, Mahdi & Rahnama, Pourya & Reitz, Rolf D., 2021. "Reactivity controlled compression ignition engine: Pathways towards commercial viability," Applied Energy, Elsevier, vol. 282(PA).
    2. Andersson, Öivind & Börjesson, Pål, 2021. "The greenhouse gas emissions of an electrified vehicle combined with renewable fuels: Life cycle assessment and policy implications," Applied Energy, Elsevier, vol. 289(C).
    3. Zheng, Zunqing & Xia, Mingtao & Liu, Haifeng & Wang, Xiaofeng & Yao, Mingfa, 2018. "Experimental study on combustion and emissions of dual fuel RCCI mode fueled with biodiesel/n-butanol, biodiesel/2,5-dimethylfuran and biodiesel/ethanol," Energy, Elsevier, vol. 148(C), pages 824-838.
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