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An Approach to Improve Smoke–Fuel Consumption Trade-Off Under Pilot Injection Mode in a Diesel Engine—Experimental and Numerical Study

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Alternative Fuels and Advanced Combustion Techniques as Sustainable Solutions for Internal Combustion Engines

Part of the book series: Energy, Environment, and Sustainability ((ENENSU))

Abstract

Shorter dwell between two injections results in improved brake-specific fuel consumption (BSFC) due to improved linking between pilot and main fuel combustion. At the same time, shorter dwell produces greater smoke/soot emissions due to shorter time available for mixing of main injected fuel and air. Hence, there exists a trade-off between smoke/soot emissions and BSFC under pilot injection mode. This trade-off has been named as smoke–BSFC trade-off in present study. In this work, this inherent issue is resolved by using a fuel injector with increased number of nozzle holes. Two fuel injectors having similar configuration except number of nozzle holes, one with 3 holes (referred as ‘N03’) and other with 6 holes (referred as ‘N06’), were used. Under pilot injection mode, smoke emissions and BSFC were reduced simultaneously with N06 compared to N03 under targeted operating conditions (1500 rpm and 75% load). Numerical simulation results showed that interactions between pilot flame and main fuel spray continued for shorter duration in case of N06 compared to N03 case which is a prime reason for getting lesser smoke emissions with increased number of nozzle holes. Faster and improved combustion process in case of N06 compared to N03 case is responsible for improving BSFC with increased number of nozzle holes. When N03 is replaced by N06, reduction in BSFC obtained was in the range of 5.2–7.6 g/kWh, while maximum reduction obtained in smoke emissions was 76.72%.

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Acknowledgements

Authors gently acknowledge the financial support provided by SVNIT, Surat, to conduct this research.

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Authors and Affiliations

  1. U. V. Patel College of Engineering, Ganpat University, Kherva, Gujarat, India

    Hiren Dave

  2. S. V. National Institute of Technology, Surat, Gujarat, India

    Bharatkumar Sutaria

  3. Gdhyana Sanshodhana Nagari Foundations, Vadodara, Gujarat, India

    Brijesh Patel

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  1. Hiren Dave
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  2. Bharatkumar Sutaria
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Editors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India

    Akhilendra Pratap Singh

  2. Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India

    Dhananjay Kumar

  3. Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India

    Avinash Kumar Agarwal

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Dave, H., Sutaria, B., Patel, B. (2021). An Approach to Improve Smoke–Fuel Consumption Trade-Off Under Pilot Injection Mode in a Diesel Engine—Experimental and Numerical Study. In: Singh, A.P., Kumar, D., Agarwal, A.K. (eds) Alternative Fuels and Advanced Combustion Techniques as Sustainable Solutions for Internal Combustion Engines. Energy, Environment, and Sustainability. Springer, Singapore. https://doi.org/10.1007/978-981-16-1513-9_15

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  • DOI: https://doi.org/10.1007/978-981-16-1513-9_15

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