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Effects of injection pressures on diesel combustion characteristics at low temperature combustion conditions in a constant volume combustion chamber

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Abstract

This experimental research seeks to explore how varying injection pressures impact the combustion characteristics of diesel fuel under low-temperature combustion (LTC) conditions. The experiments were carried out in a constant volume combustion chamber (CVCC) system equipped with a high-pressure common rail injection system. The ambient temperature of 800 K represents the LTC condition within the chamber, generated using a pre-combustion technique. The combustion pressure, heat release rate, and ignition delay were derived from the combustion pressure data recorded by a piezoelectric transducer sensor. The combustion characteristics of low-temperature conditions were compared with those of conventional diesel combustion engine conditions (1000 K) at high fuel injection pressures (800 bar and 1200 bar). The results indicated a higher maximum combustion pressure and a peak in the heat release rate under LTC conditions, primarily due to an extended ignition delay, which resulted in a greater accumulation and combustion of fuel during the uncontrolled combustion phase. However, the chemical combustion rate under LTC conditions deteriorates with increased fuel injection pressure, attributed to the longer liquid penetration length and higher latent heat effects of fuel vaporization. Therefore, reducing the injection pressure has significant potential to enhance combustion efficiency and shorten combustion duration, but it would also retard the combustion phase away from the start of injection.

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Abbreviations

Q :

Heat release

γ :

Specific heat ratio

P :

Pressure

V :

Volume

LTC :

Low temperature combustion

CVCC :

Constant volume combustion chamber

IDP :

Ignition delay period

HRR :

Heat release rate

SOI :

Start of Injection

SOC :

Start of combustion

NO x :

Nitrogen oxides

HC :

Hydrocarbons

CO :

Carbon monoxide

PM :

Particulate matter

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Acknowledgments

This research is funded by Industrial University of Ho Chi Minh City (IUH), Vietnam for the research project under Grant No. 23.1DL01. We acknowledge the support of time and facilities from Ho Chi Minh City University of Technology (HCMUT), VNU-HCM for this study.

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Authors and Affiliations

  1. Industrial University of Ho Chi Minh City (IUH), Ho Chi Minh City, Vietnam

    Chau Tan Vo

  2. Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam

    Tai The Mai, Au Hai Ho & Long Dang Tran

  3. Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam

    Tai The Mai, Au Hai Ho & Long Dang Tran

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  1. Chau Tan Vo
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Correspondence to Chau Tan Vo.

Additional information

This paper was presented at International Session in KSME Annual Meeting 2023, Songdo Convensia, Incheon, Korea & Online, November 1–4, 2023.

Chau Tan Vo received his B.Eng. degree in Transportation Engineering from Ho Chi Minh City University of Technology (HCMUT), Vietnam in 2010, then, master’s degree in Mechanical Engineering from the Institute of Technology Bandung (ITB), Indonesia in 2013, and doctoral degree in Mechanical Engineering from the joint program between the King Mongkut’s Institute of Technology Ladkrabang (KMITL), Thailand and the Tokyo Institute of Technology (TIT), Japan, respectively. He is currently a lecturer in the Faculty of Automotive Engineering Technology, Industrial University of Ho Chi Minh City, Vietnam. His research interests include internal combustion engine testing, alternative fuel technology, spray and combustion visualization.

Tai The Mai received a B.Eng. degree in Automotive Engineering Technology from the Industrial University of Ho Chi Minh City (IUH), Vietnam in 2019. Currently, he is a master program’s student in the Faculty of Transportation Engineering under the supervision of Dr. Vo Tan Chau at the Ho Chi Minh City University of Technology (HCMUT), Vietnam. His interests include internal combustion engines, alternative fuels, combustion characteristics, and communication networks in vehicles.

Au Hai Ho received B.Eng. degree in the major of Automotive Engineering from Ho Chi Minh City University of Technology (HCMUT), Vietnam in 2023. His interests include internal combustion engines, alternative fuels, combustion characteristics, and exhaust gas treatment systems.

Long Dang Tran received a B.Eng. degree and a master’s degree in major of Electric-Electronics and Automation from Ho Chi Minh City University of Technology (HCMUT), Vietnam, in 2002 and 2005, respectively. Then, he pursued the doctoral study program in Hydrogen Energy System & Solid Oxide Fuel Cell at Kyushu University, Japan in the period from 2014–2017. Currently, he is a lecturer in the Department of Automobile-Engines Engineering, Ho Chi Minh City University of Technology (HCMUT), Vietnam. His research interests include automotive measurement solutions and real-time control systems, automotive electric powertrains, and fuel cells.

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Vo, C.T., Mai, T.T., Ho, A.H. et al. Effects of injection pressures on diesel combustion characteristics at low temperature combustion conditions in a constant volume combustion chamber. J Mech Sci Technol 38, 2789–2796 (2024). https://doi.org/10.1007/s12206-024-2209-z

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