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Investigation of Sectional-Stage Loading Strategies on a Two-Stage Turbocharged Heavy-Duty Diesel Engine under Transient Operation with EGR

Author

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  • Zhongchang Liu

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China)

  • Xing Yuan

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China)

  • Jing Tian

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China)

  • Yongqiang Han

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China)

  • Runzhao Li

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China)

  • Guanlong Gao

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China)

Abstract

The influence of loading strategies on combustion and emissions parameters is experimentally and numerically studied under typical 5 s transient conditions of constant speed and increasing torque. The experiment is conducted on a two-stage turbocharged heavy-duty diesel engine with a constant opening valve high-pressure exhaust gas recirculation (EGR) system. The test results show that: compared with the full-stage loading (FSL) strategy (constant loading rate during the entire transient process), the sectional-stage loading (SSL) strategies (holding a certain time at 50% load) can significantly reduce soot emissions (by 41.3%); the greater the first-stage loading rate, the better the torque response performance, which maximally increases by 56.7%. Besides, longer loading holding time can effectively restrain the overshoot of EGR rate and advance the combustion phase (CA10, CA50) at medium and large loads. However, the larger second-stage loading rate slightly deteriorates the combustion and emission performance. This deterioration situation can be markedly suppressed by adopting a suitable loading hold time.

Suggested Citation

  • Zhongchang Liu & Xing Yuan & Jing Tian & Yongqiang Han & Runzhao Li & Guanlong Gao, 2018. "Investigation of Sectional-Stage Loading Strategies on a Two-Stage Turbocharged Heavy-Duty Diesel Engine under Transient Operation with EGR," Energies, MDPI, vol. 11(1), pages 1-19, January.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:1:p:69-:d:124977
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    Cited by:

    1. Qiang Liu & Zhongchang Liu & Yongqiang Han & Jing Tian & Jun Wang & Jian Fang, 2018. "Experimental Investigation of the Loading Strategy of an Automotive Diesel Engine under Transient Operation Conditions," Energies, MDPI, vol. 11(5), pages 1-15, May.
    2. Wenyu Gu & Wanhua Su, 2023. "Study on the Effects of Exhaust Gas Recirculation and Fuel Injection Strategy on Transient Process Performance of Diesel Engines," Sustainability, MDPI, vol. 15(16), pages 1-21, August.

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