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Boot injection dynamics and parametrical analysis of boot shaped injections in low-temperature combustion diesel engines for the optimization of pollutant emissions and combustion noise

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  • d’Ambrosio, S.
  • Ferrari, A.

Abstract

Innovative direct-acting piezoelectric injectors that are capable of flexible injection rate shaping have been tested at a hydraulic test rig. The effect of boot injection dynamics on the injector hydraulic performance was analyzed on the basis of the measured injected flow-rate time histories. The injectors were then installed on a Euro 5 low-compression ratio diesel engine, fueled with conventional diesel oil and managed with a late PCCI type combustion. The engine has been tested at a dynamometer cell, and a parametric analysis has been performed considering both the charging time and the holding time of the boot injection in order to assess the impact of their variations on engine-out emissions, combustion noise and brake specific fuel consumption. Explanations of the cause-and-effect relationships between the boot injection parameters and the engine performance have been provided: a three-zone combustion diagnostic tool has been applied to support the experimental investigation.

Suggested Citation

  • d’Ambrosio, S. & Ferrari, A., 2017. "Boot injection dynamics and parametrical analysis of boot shaped injections in low-temperature combustion diesel engines for the optimization of pollutant emissions and combustion noise," Energy, Elsevier, vol. 134(C), pages 420-437.
    • Handle: RePEc:eee:energy:v:134:y:2017:i:c:p:420-437
    DOI: 10.1016/j.energy.2017.05.176
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    References listed on IDEAS

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    1. Catania, A.E. & Ferrari, A., 2012. "Development and performance assessment of the new-generation CF fuel injection system for diesel passenger cars," Applied Energy, Elsevier, vol. 91(1), pages 483-495.
    2. Ferrari, A. & Mittica, A., 2012. "FEM modeling of the piezoelectric driving system in the design of direct-acting diesel injectors," Applied Energy, Elsevier, vol. 99(C), pages 471-483.
    3. Mohan, Balaji & Yang, Wenming & Chou, Siaw kiang, 2013. "Fuel injection strategies for performance improvement and emissions reduction in compression ignition engines—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 664-676.
    4. Torregrosa, A.J. & Broatch, A. & García, A. & Mónico, L.F., 2013. "Sensitivity of combustion noise and NOx and soot emissions to pilot injection in PCCI Diesel engines," Applied Energy, Elsevier, vol. 104(C), pages 149-157.
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    Cited by:

    1. Ferrari, A. & Novara, C. & Paolucci, E. & Vento, O. & Violante, M. & Zhang, T., 2018. "Design and rapid prototyping of a closed-loop control strategy of the injected mass for the reduction of CO2, combustion noise and pollutant emissions in diesel engines," Applied Energy, Elsevier, vol. 232(C), pages 358-367.
    2. Song, Heping & Liu, Changpeng & Li, Yanfei & Wang, Zhi & Chen, Longfei & He, Xin & Wang, Jianxin, 2018. "An exploration of utilizing low-pressure diesel injection for natural gas dual-fuel low-temperature combustion," Energy, Elsevier, vol. 153(C), pages 248-255.

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