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Effects of Pilot Injection Timing and EGR on Combustion, Performance and Exhaust Emissions in a Common Rail Diesel Engine Fueled with a Canola Oil Biodiesel-Diesel Blend

Author

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  • Jun Cong Ge

    (Division of Mechanical Design Engineering, Chonbuk National University, 567 Baekje-daero, Jeonjusi, Jeollabuk-do 561-756, Korea)

  • Min Soo Kim

    (Division of Mechanical Design Engineering, Chonbuk National University, 567 Baekje-daero, Jeonjusi, Jeollabuk-do 561-756, Korea)

  • Sam Ki Yoon

    (Technical Education Center, GM Korea Company, 72 Saengmuol-ro, Gunsansi, Jeollabuk-do 573-882, Korea)

  • Nag Jung Choi

    (Division of Mechanical Design Engineering, Chonbuk National University, 567 Baekje-daero, Jeonjusi, Jeollabuk-do 561-756, Korea)

Abstract

Biodiesel as a clean energy source could reduce environmental pollution compared to fossil fuel, so it is becoming increasingly important. In this study, we investigated the effects of different pilot injection timings from before top dead center (BTDC) and exhaust gas recirculation (EGR) on combustion, engine performance, and exhaust emission characteristics in a common rail diesel engine fueled with canola oil biodiesel-diesel (BD) blend. The pilot injection timing and EGR rate were changed at an engine speed of 2000 rpm fueled with BD20 (20 vol % canola oil and 80 vol % diesel fuel blend). As the injection timing advanced, the combustion pressure, brake specific fuel consumption (BSFC), and peak combustion pressure (P max ) changed slightly. Carbon monoxide (CO) and particulate matter (PM) emissions clearly decreased at BTDC 20° compared with BTDC 5°, but nitrogen oxide (NO x ) emissions increased slightly. With an increasing EGR rate, the combustion pressure and indicated mean effective pressure (IMEP) decreased slightly at BTDC 20° compared to other injection timings. However, the P max showed a remarkable decrease. The BSFC and PM emissions increased slightly, but the NO x emission decreased considerably.

Suggested Citation

  • Jun Cong Ge & Min Soo Kim & Sam Ki Yoon & Nag Jung Choi, 2015. "Effects of Pilot Injection Timing and EGR on Combustion, Performance and Exhaust Emissions in a Common Rail Diesel Engine Fueled with a Canola Oil Biodiesel-Diesel Blend," Energies, MDPI, vol. 8(7), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:7:p:7312-7325:d:52856
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    1. Sam Ki Yoon & Min Soo Kim & Han Joo Kim & Nag Jung Choi, 2014. "Effects of Canola Oil Biodiesel Fuel Blends on Combustion, Performance, and Emissions Reduction in a Common Rail Diesel Engine," Energies, MDPI, vol. 7(12), pages 1-18, December.
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    3. Öner, Cengiz & Altun, Sehmus, 2009. "Biodiesel production from inedible animal tallow and an experimental investigation of its use as alternative fuel in a direct injection diesel engine," Applied Energy, Elsevier, vol. 86(10), pages 2114-2120, October.
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