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Comparative Study of the Effective Release Energy, Residual Gas Fraction, and Emission Characteristics with Various Valve Port Diameter-Bore Ratios (VPD/B) of a Four-Stroke Spark Ignition Engine

Author

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  • Nguyen Xuan Khoa

    (Graduate School of Mechanical Engineering, University of Ulsan, Ulsan 44610, Korea
    Faculty of Automobile Technology, HaNoi University of Industry, Ha Noi 100000, Viet Nam)

  • Ocktaeck Lim

    (School of Mechanical Engineering, University of Ulsan, Ulsan 44610, Korea)

Abstract

In this research, the residual gas, peak firing pressure increase, and effective release energy were completely investigated. To obtain this target, the experimental system is installed with a dynamo system and a simulation model was setup. Through combined experimental and simulation methods, the drawbacks of the hardware optimization method were eliminated. The results of the research show that the valve port diameter-bore ratio (VPD/B) has a significant effect on the residual gas, peak firing pressure increase, and effective release energy of a four-stroke spark ignition engine. In this research, the engine was performed at 3000 rpm and full load condition. Following increased IPD/B ratio of 0.3–0.5. The intake port and exhaust port diameter has a contrary effect on engine volumetric efficiency, the residual gas ratio increase 27.3% with larger intake port and decrease 18.6% with larger exhaust port. The engine will perform optimal thermal efficiency when the trapped residual gas fraction ratio is from 13% to 14%. The maximum effective release energy was 0.45 kJ at 0.4 intake port-bore ratio, and 0.451 kJ at 0.35 exhaust port-bore ratio. The NO x emission increases until achieved a maximum value after that decrease even VPD/B was still increasing. With a VPD/B ratio of 0.35 to 0.4, the engine works without the misfiring.

Suggested Citation

  • Nguyen Xuan Khoa & Ocktaeck Lim, 2020. "Comparative Study of the Effective Release Energy, Residual Gas Fraction, and Emission Characteristics with Various Valve Port Diameter-Bore Ratios (VPD/B) of a Four-Stroke Spark Ignition Engine," Energies, MDPI, vol. 13(6), pages 1-18, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:6:p:1330-:d:331706
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    References listed on IDEAS

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    1. Teo, A.E. & Chiong, M.S. & Yang, M. & Romagnoli, A. & Martinez-Botas, R.F. & Rajoo, S., 2019. "Performance evaluation of low-pressure turbine, turbo-compounding and air-Brayton cycle as engine waste heat recovery method," Energy, Elsevier, vol. 166(C), pages 895-907.
    2. Khoa, Nguyen Xuan & Lim, Ocktaeck, 2019. "The effects of combustion duration on residual gas, effective release energy, engine power and engine emissions characteristics of the motorcycle engine," Applied Energy, Elsevier, vol. 248(C), pages 54-63.
    3. Jung, Dongwon & Iida, Norimasa, 2018. "An investigation of multiple spark discharge using multi-coil ignition system for improving thermal efficiency of lean SI engine operation," Applied Energy, Elsevier, vol. 212(C), pages 322-332.
    4. Shi, Lingfeng & Shu, Gequn & Tian, Hua & Deng, Shuai, 2018. "A review of modified Organic Rankine cycles (ORCs) for internal combustion engine waste heat recovery (ICE-WHR)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 92(C), pages 95-110.
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    Cited by:

    1. Tuan Nghia Nguyen & Nguyen Xuan Khoa & Le Anh Tuan, 2021. "The Correlation of Biodiesel Blends with the Common Rail Diesel Engine’s Performance and Emission Characteristics," Energies, MDPI, vol. 14(11), pages 1-18, May.
    2. Khoa, Nguyen Xuan & Quach Nhu, Y. & Lim, Ocktaeck, 2020. "Estimation of parameters affected in internal exhaust residual gases recirculation and the influence of exhaust residual gas on performance and emission of a spark ignition engine," Applied Energy, Elsevier, vol. 278(C).
    3. Nguyen Xuan Khoa & Ocktaeck Lim, 2022. "A Review of the External and Internal Residual Exhaust Gas in the Internal Combustion Engine," Energies, MDPI, vol. 15(3), pages 1-21, February.
    4. Nguyen Xuan Khoa & Ocktaeck Lim, 2021. "A Study to Investigate the Effect of Valve Mechanisms on Exhaust Residual Gas and Effective Release Energy of a Motorcycle Engine," Energies, MDPI, vol. 14(17), pages 1-14, September.
    5. Quach-Nhu Yhcmute & Nguyen-Xuan Khoa & Ocktaeck Lim, 2021. "A Study on the Effect of Ignition Timing on Residual Gas, Effective Release Energy, and Engine Emissions of a V-Twin Engine," Energies, MDPI, vol. 14(15), pages 1-18, July.

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