Article
Energy & Fuels
Xiaoyu Cong, Changwei Ji, Shuofeng Wang
Summary: The study found that blending DME can extend flame development and propagation periods, increase power output of the neat hydrogen engine, and reduce nitrogen oxides emissions. However, blending DME may increase cyclic variation due to weakened flame kernel and propagation process, but emissions can be controlled by adjusting the DME fraction.
Article
Energy & Fuels
Shah Saud Alam, Scott Wilson Rosa, Christopher Depcik, Sindhu Preetham Burugupally, Ethan McDaniel, Jared D. Hobeck
Summary: An adaptive Wiebe function was developed for methane-air combustion and oxy-methane combustion in spark-ignition (SI) engines. Linear regression analysis was used to fit the adaptive Wiebe model to experimental data with good accuracy. Scaling process was extended for specialized SI applications. Comparisons with literature show that the scaled Wiebe function is a reasonable tool for combustion predictions.
Article
Automation & Control Systems
Qilun Zhu, Robert Prucka, Shu Wang, Michael Prucka
Summary: The paper introduces three online SPKT optimization algorithms that can leverage control-oriented semiphysics-based combustion models to enhance the adaptability of the SPKT control algorithm. These methods do not require model inversion and derivative information, and can effectively find the optimal SPKT. Simulation and test results demonstrate that these approaches can find the optimal SPKT with less than 10 evaluations of the combustion models, laying the foundation for implementing the proposed model-based SPKT control strategy in future engine control units (ECUs).
JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Mechanical
Caio H. Rufino, Waldyr L. R. Gallo, Janito Ferreira
Summary: Evaluation of combustion duration and flame development of Brazilian hydrous ethanol fuel in a commercial flexfuel engine revealed the relationship between engine parameters and combustion characteristics under various operational conditions. The results showed differences compared to gasoline combustion, including reduced sensitivity to detonation and a shorter combustion duration for ethanol.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2021)
Article
Energy & Fuels
Pierpaolo Napolitano, Irina Jimenez, Benjamin Pla, Carlo Beatrice
Summary: This paper proposes a knock detection strategy for heavy-duty natural gas engines based on a combination of knock sensors and combustion modeling. The results show that this method has better knock recognition capabilities compared to traditional methods based on in-cylinder pressure analysis, with the advantage of using only knock sensors.
Article
Energy & Fuels
Changzhao Jiang, Chongming Wang, Hongming Xu, Haoye Liu, Xiao Ma
Summary: The study found that employing the stratified lean-burn mode in spark-ignition engines can significantly improve fuel economy, with up to a 16% increase if the second injection timing is optimized. The second injection timing also has significant impacts on IMEP, combustion duration, COV, gaseous emission, and particulate number emissions.
Article
Energy & Fuels
Hao Yuan, Karl Giles, Sipeng Zhu, Simeon Howson, Andrew Lewis, Sam Akehurst, Niall Turner, James Harris, Gavin Fowler, John Geddes
Summary: This study models the impact of direct water injection on the combustion process in a spark ignition engine, highlighting the thermodynamic and chemical-kinetic interactions between gasoline combustion and water injection. It shows that water injection can advance the combustion phasing by reducing in-cylinder temperature, thereby affecting the knock limited spark advance and improving engine performance.
Article
Chemistry, Physical
G. Maio, A. Boberic, L. Giarracca, D. Aubagnac-Karkar, O. Colin, F. Duffour, K. Deppenkemper, L. Virnich, S. Pischinger
Summary: This paper presents the optimization of the combustion process in the H-2 internal combustion engine through experimental and numerical investigations. The effects of direct injection and port fuel injection configurations on performance are discussed. Experimental results show that the port fuel injection configuration provides advantages in terms of efficiency and emissions, but at the expense of volumetric efficiency. The proposed numerical model successfully simulates different engine operating conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Hyunwook Park, Junsun Lee, Narankhuu Jamsran, Seungmook Oh, Changup Kim, Yonggyu Lee, Kernyong Kang
Summary: Synthesis gas (syngas) serves as an intermediary fuel source between traditional carbon-based fuels and hydrogen-based fuels. The comparison between stoichiometric and lean combustion modes in a single-cylinder SI engine reveals the optimal combustion mode for a syngas engine generator. The study highlights the importance of optimizing factors such as compression ratio and intake boosting for improved engine performance. However, differences in power output and thermal efficiency exist between the two combustion modes, emphasizing trade-offs in engine design.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Leiming Chen, Zhaoping Xu, Shuangshuang Liu, Liang Liu
Summary: A dynamic combustion model combining a modified triple Wiebe function with an artificial neural network is proposed for control synthesis design in an opposed-piston free-piston engine. The model accurately represents the complex combustion process and can be used to develop control strategies without experiments.
Article
Energy & Fuels
Ricardo Novella, Antonio Garcia, Josep Gomez-Soriano, Alvaro Fogue-Robles
Summary: In response to the existing political environment and concerns about climate change, strict regulations on traditional propulsion systems reliant on fossil fuels have been imposed. This study evaluates the potential of substituting EGR dilution with a water injection system for full load operation on a conventional diesel engine and compares it with EGR. The results show that water injection significantly reduces boost pressure requirements while achieving similar engine efficiency and reducing NOx emissions by around 80%.
Article
Energy & Fuels
Hammam Aljabri, Mickael Silva, Moez Ben Houidi, Xinlei Liu, Moaz Allehaibi, Fahad Almatrafi, Abdullah S. AlRamadan, Balaji Mohan, Emre Cenker, Hong G. Im
Summary: This study investigates the potential of hydrogen combustion in internal combustion engines, focusing on spark ignition and pre-chamber modes. The research explores various parameters, such as compression ratio, air-fuel ratio, and spark timing, to optimize engine combustion performance and reduce emissions. It also discusses the limitations and challenges of using pre-chamber combustion in hydrogen engine applications.
Article
Energy & Fuels
Haoye Liu, Rafiu Olalere, Chongming Wang, Xiao Ma, Hongming Xu
Summary: 2-Methylfuran (MF) is considered a promising second-generation biofuel for spark ignition engines due to its better anti-knock ability and close lower heating value to conventional fuels. The study investigates the effects of engine control parameters on MF combustion at typical DISI engine operating conditions, showing that MF has a wider achievable spark timing range and more robustness to lean burn compared to gasoline and ethanol at high load. The combustion characteristics and heat release of MF are less sensitive to injection timings variations, but longer injection durations are required compared to gasoline to achieve the same engine load.
Article
Chemistry, Physical
Caneon Kurien, Penmatsa Sandeep Varma, Mayank Mittal
Summary: The non-carbon nature and higher hydrogen energy density of ammonia have attracted attention as an energy asset and green fuel. This study investigates the effects of ammonia fuel share and engine operating load on the combustion stability and engine characteristics of gaseous (NH3/CH4) fuelled SI engine. The results show that higher ammonia share and lower engine load result in detrimental engine performance and higher combustion variations, while higher operating load improves engine performance and combustion stability. Substituting methane with ammonia can be maximized at higher engine operating loads for clean fuel utilization.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
R. Ortiz-Imedio, A. Ortiz, J. C. Urroz, P. M. Dieguez, D. Gorri, L. M. Gandia, I Ortiz
Summary: The study indicates that coke oven gas as an auxiliary support and energy source in internal combustion engines shows promising potential, combining the advantages of pure H-2 and pure CH4 with good performance and emissions results.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
J. P. Zammit, M. J. McGhee, P. J. Shayler, T. Law, I. Pegg
Article
Engineering, Mechanical
A. La Rocca, F. Bonatesta, M. W. Fay, F. Campanella
TRIBOLOGY INTERNATIONAL
(2015)
Article
Energy & Fuels
F. Bonatesta, G. Altamore, J. Kalsi, M. Cary
Article
Energy & Fuels
Sadjad Tajdaran, Fabrizio Bonatesta, Raymond Ogden, Christopher Kendrick
Article
Energy & Fuels
F. Bonatesta, E. Chiappetta, A. La Rocca
Article
Thermodynamics
Wei Jet Thoo, Arman Kevric, Hoon Kiat Ng, Suyin Gan, Paul Shayler, Antonino La Rocca
APPLIED THERMAL ENGINEERING
(2014)
Article
Engineering, Mechanical
Jean-Paul Zammit, Michael J. McGhee, Paul J. Shayler, Ian Pegg
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2014)
Article
Engineering, Mechanical
David MacMillan, Theo Law, Paul J. Shayler, Ian Pegg
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2014)
Article
Engineering, Mechanical
A. La Rocca, G. Di Liberto, P. J. Shayler, M. W. Fay
TRIBOLOGY INTERNATIONAL
(2013)
Article
Engineering, Mechanical
A. La Rocca, G. Di Liberto, P. J. Shayler, C. D. J. Parmenter, M. W. Fay
TRIBOLOGY INTERNATIONAL
(2014)
Article
Thermodynamics
Federico Biagiotti, Fabrizio Bonatesta, Sadjad Tajdaran, Davide Domenico Sciortino, Sunny Verma, Edward Hopkins, Denise Morrey, Changho Yang, Adrian Spencer, Changzhao Jiang, Robert Haigh
Summary: This study presents a Computational Fluid Dynamics methodology for accurately modeling mixture preparation in modern Gasoline Direct Injection engines, with a focus on the impact of liquid film on Particulate Matter formation. The results show that fuel mal-distribution and liquid film retention can contribute to PN emissions, with their significance varying depending on operating conditions and engine control strategies.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2022)
Proceedings Paper
Construction & Building Technology
Sadjad Tajdaran, Fabrizio Bonatesta, Raymond Ogden, Christopher Kendrick
6TH INTERNATIONAL BUILDING PHYSICS CONFERENCE (IBPC 2015)
(2015)
Proceedings Paper
Microscopy
M. W. Fay, A. La Rocca, P. J. Shayler
ELECTRON MICROSCOPY AND ANALYSIS GROUP CONFERENCE 2013 (EMAG2013)
(2014)
Article
Transportation Science & Technology
Antonino La Rocca, Gianluca Di Liberto, Paul Shayler, Christopher Parmenter, Mike Fay
SAE INTERNATIONAL JOURNAL OF FUELS AND LUBRICANTS
(2014)
Proceedings Paper
Engineering, Mechanical
R. Gardiner, C. Zhao, J. Addison, P. J. Shayler
VEHICLE THERMAL MANAGEMENT SYSTEMS CONFERENCE PROCEEDINGS (VTMS 11)
(2013)