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Part-load characteristics of direct injection spark ignition engine using exhaust gas trap

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  • Bai, Yun-long
  • Wang, Zhi
  • Wang, Jian-xin

Abstract

Internal exhaust gas recirculation (EGR) is an effective strategy to reduce pumping loss and improve fuel economy using mixture dilution than traditional external EGR. In this paper, the internal EGR was obtained by exhaust gas trap (EGT) using the negative valve overlap (NVO) method. The effects of EGT on the part-load characteristics, including energy conversion, combustion and emission characteristics were studied in a direct injection spark ignition (DISI) engine. The experimental results showed that EGT can save fuel consumption by 5-16% due to reduced pumping loss and improved combustion efficiency, while it also can increase the engine cyclic variation and combustion duration. The engine cyclic variation increases with increasing of the EGT level; this can be overcome by advancing spark timing to stabilize the combustion. The flame propagation and compression combustion occurred simultaneously when high EGT level and high compression ratio were adopted; the combined combustion can reduce combustion duration but increase the engine cyclic variation. The stratified mixture using the two-stage injection strategy can reduce the engine cyclic variation and shorten the combustion duration so as to improve the thermal efficiency. Moreover, the second injection mass ratio and timing take an important effect on the combustion and emission characteristics in DISI engines using EGT strategy.

Suggested Citation

  • Bai, Yun-long & Wang, Zhi & Wang, Jian-xin, 2010. "Part-load characteristics of direct injection spark ignition engine using exhaust gas trap," Applied Energy, Elsevier, vol. 87(8), pages 2640-2646, August.
    • Handle: RePEc:eee:appene:v:87:y:2010:i:8:p:2640-2646
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    Citations

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    Cited by:

    1. Curto-Risso, P.L. & Medina, A. & Calvo Hernández, A. & Guzmán-Vargas, L. & Angulo-Brown, F., 2011. "On cycle-to-cycle heat release variations in a simulated spark ignition heat engine," Applied Energy, Elsevier, vol. 88(5), pages 1557-1567, May.
    2. Gan, Suyin & Ng, Hoon Kiat & Pang, Kar Mun, 2011. "Homogeneous Charge Compression Ignition (HCCI) combustion: Implementation and effects on pollutants in direct injection diesel engines," Applied Energy, Elsevier, vol. 88(3), pages 559-567, March.
    3. Li, Yangtao & Khajepour, Amir & Devaud, Cécile & Liu, Kaimin, 2017. "Power and fuel economy optimizations of gasoline engines using hydraulic variable valve actuation system," Applied Energy, Elsevier, vol. 206(C), pages 577-593.
    4. Chitsaz, Iman & Saidi, Mohammad Hassan & Mozafari, Ali Asghar & Hajialimohammadi, Alireza, 2013. "Experimental and numerical investigation on the jet characteristics of spark ignition direct injection gaseous injector," Applied Energy, Elsevier, vol. 105(C), pages 8-16.
    5. Wei, Haiqiao & Zhu, Tianyu & Shu, Gequn & Tan, Linlin & Wang, Yuesen, 2012. "Gasoline engine exhaust gas recirculation – A review," Applied Energy, Elsevier, vol. 99(C), pages 534-544.
    6. Fu-Kang Ma & Jun Wang & Yao-Nan Feng & Yan-Gang Zhang & Tie-Xiong Su & Yi Zhang & Yu-Hang Liu, 2017. "Parameter Optimization on the Uniflow Scavenging System of an OP2S-GDI Engine Based on Indicated Mean Effective Pressure (IMEP)," Energies, MDPI, vol. 10(3), pages 1-20, March.
    7. Najjar, Yousef S.H., 2011. "Comparison of performance of a Greener direct-injection stratified-charge (DISC) engine with a spark-ignition engine using a simplified model," Energy, Elsevier, vol. 36(7), pages 4136-4143.
    8. Andwari, Amin Mahmoudzadeh & Aziz, Azhar Abdul & Said, Mohd Farid Muhamad & Latiff, Zulkarnain Abdul, 2014. "Experimental investigation of the influence of internal and external EGR on the combustion characteristics of a controlled auto-ignition two-stroke cycle engine," Applied Energy, Elsevier, vol. 134(C), pages 1-10.
    9. Bermúdez, Vicente & Luján, José Manuel & Climent, Héctor & Campos, Daniel, 2015. "Assessment of pollutants emission and aftertreatment efficiency in a GTDi engine including cooled LP-EGR system under different steady-state operating conditions," Applied Energy, Elsevier, vol. 158(C), pages 459-473.
    10. Agarwal, Deepak & Singh, Shrawan Kumar & Agarwal, Avinash Kumar, 2011. "Effect of Exhaust Gas Recirculation (EGR) on performance, emissions, deposits and durability of a constant speed compression ignition engine," Applied Energy, Elsevier, vol. 88(8), pages 2900-2907, August.
    11. Irimescu, Adrian, 2011. "Fuel conversion efficiency of a port injection engine fueled with gasoline–isobutanol blends," Energy, Elsevier, vol. 36(5), pages 3030-3035.

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