Maximizing Power Output In Homogeneous Charge Compression Ignition Hcci Engines And Enabling Effective Control Of Combustion Timing
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Maximizing Power Output In Homogeneous Charge Compression Ignition Hcci Engines And Enabling Effective Control Of Combustion Timing
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Author : Samveg Saxena
language : en
Publisher:
Release Date : 2011
Maximizing Power Output In Homogeneous Charge Compression Ignition Hcci Engines And Enabling Effective Control Of Combustion Timing written by Samveg Saxena and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Homogeneous Charge Compression Ignition (HCCI) engines are one of the most promising engine technologies for the future of energy conversion from clean, efficient combustion. HCCI engines allow high efficiency and lower CO2 emission through the use of high compression ratios and the removal of intake throttle valves (like Diesel), and allow very low levels of urban pollutants like nitric oxide and soot (like Otto). These engines, however, are not without their challenges, such as low power density compared with other engine technologies, and a difficulty in controlling combustion timing. This dissertation first addresses the power output limits. The particular strategies for enabling high power output investigated in this dissertation focus on avoiding five critical limits that either damage an engine, drastically reduce efficiency, or drastically increase emissions: 1) ringing limits, 2) peak in-cylinder pressure limits, 3) misfire limits, 4) low intake temperature limits, and 5) excessive emissions limits. The research shows that the key factors that enable high power output, sufficient for passenger vehicles, while simultaneously avoiding the five limits defined above are the use of: 1) high intake air pressures allowing improved power output, 2) highly delayed combustion timing to avoid ringing limits, and 3) using the highest possible equivalence ratio before encountering ringing limits. These results are revealed by conducting extensive experiments spanning a wide range of operating conditions on a multi-cylinder HCCI engine. Second, this dissertation discusses strategies for effectively sensing combustion characteristics on a HCCI engine. For effective feedback control of HCCI combustion timing, a sensor is required to quantify when combustion occurs. Many laboratory engines use in-cylinder pressure sensors but these sensors are currently prohibitively expensive for wide-scale commercialization. Instead, ion sensors made from inexpensive sparkplugs are proposed for sensing combustion timing. Ion sensing, however, is unreliable under certain HCCI conditions. The dissertation presents two strategies for improving the usefulness of ion sensors in HCCI engines: 1) the use of tiny fractions of metal-acetate fuel additives that expand the useful range of ion sensors, and 2) the use of ion sensors for detecting excessive ringing that must be avoided in HCCI engines. These two innovative research efforts make ion sensors viable for sensing combustion characteristics across the full range of HCCI operation, making them effective for use in engine control systems. In summary, this Ph. D dissertation addresses two important technical challenges facing HCCI engines: power output limits, and difficulty in sensing combustion characteristics for control applications. The strategies proposed in this dissertation research bring HCCI engines closer to widespread commercialization allowing vehicles to operate with significantly higher efficiency and with cleaner emissions.
Characteristics And Control Of Low Temperature Combustion Engines
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Author : Rakesh Kumar Maurya
language : en
Publisher: Springer
Release Date : 2017-11-03
Characteristics And Control Of Low Temperature Combustion Engines written by Rakesh Kumar Maurya and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-03 with Technology & Engineering categories.
This book deals with novel advanced engine combustion technologies having potential of high fuel conversion efficiency along with ultralow NOx and particulate matter (PM) emissions. It offers insight into advanced combustion modes for efficient utilization of gasoline like fuels. Fundamentals of various advanced low temperature combustion (LTC) systems such as HCCI, PCCI, PPC and RCCI engines and their fuel quality requirements are also discussed. Detailed performance, combustion and emissions characteristics of futuristic engine technologies such as PPC and RCCI employing conventional as well as alternative fuels are analyzed and discussed. Special emphasis is placed on soot particle number emission characterization, high load limiting constraints, and fuel effects on combustion characteristics in LTC engines. For closed loop combustion control of LTC engines, sensors, actuators and control strategies are also discussed. The book should prove useful to a broad audience, including graduate students, researchers, and professionals Offers novel technologies for improved and efficient utilization of gasoline like fuels; Deals with most advanced and futuristic engine combustion modes such as PPC and RCCI; Comprehensible presentation of the performance, combustion and emissions characteristics of low temperature combustion (LTC) engines; Deals with closed loop combustion control of advanced LTC engines; State-of-the-art technology book that concisely summarizes the recent advancements in LTC technology. .
Reciprocating Engine Combustion Diagnostics
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Author : Rakesh Kumar Maurya
language : en
Publisher: Springer
Release Date : 2019-03-19
Reciprocating Engine Combustion Diagnostics written by Rakesh Kumar Maurya and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-03-19 with Technology & Engineering categories.
This book deals with in-cylinder pressure measurement and its post-processing for combustion quality analysis of conventional and advanced reciprocating engines. It offers insight into knocking and combustion stability analysis techniques and algorithms in SI, CI, and LTC engines, and places special emphasis on the digital signal processing of in-cylinder pressure signal for online and offline applications. The text gives a detailed description on sensors for combustion measurement, data acquisition, and methods for estimation of performance and combustion parameters. The information provided in this book enhances readers’ basic knowledge of engine combustion diagnostics and serves as a comprehensive, ready reference for a broad audience including graduate students, course instructors, researchers, and practicing engineers in the automotive, oil and other industries concerned with internal combustion engines.
Fundamentals Of Green Hydrogen Supply Chain And Power To X
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Author : Hani Muhsen
language : en
Publisher: CRC Press
Release Date : 2025-08-29
Fundamentals Of Green Hydrogen Supply Chain And Power To X written by Hani Muhsen and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-08-29 with Technology & Engineering categories.
This book offers an engaging introduction to green hydrogen and its role in changing the global energy landscape. It explains theoretical and practical aspects of the green hydrogen supply chain, including production, storage, transportation, and utilization, and explores the techno-economic aspects relevant to each stage. Through hands-on examples, readers understand how green hydrogen can be implemented across various applications. It explains Power-to-X technologies, which enable the conversion of green hydrogen into eco-friendly fuels and chemical feedstocks. Designed for students and researchers, this book simplifies complex concepts and provides a comprehensive understanding of green hydrogen's benefits. Key Features: Covers end-to-end the green hydrogen and Power-to-X technologies (PtX) supply chain. Provides a holistic and integrated approach of theoretical and practical knowledge utilizing examples and various case studies from around the world. Demonstrates the global potential of green hydrogen with sector-specific applications and case studies. Includes cutting-edge and recent developments in the green hydrogen landscape with clear visuals and technical explanations. Discusses forward-looking evaluations of Power-to-X technologies, hydrogen safety, and green hydrogen techno-economic aspects. Written in simple yet detailed language for a wide spectrum of readers. Tests readers' comprehension of the topics covered with self-assessment questions at the end of each chapter. This textbook is an excellent foundational text for university students and researchers in renewable energy engineering, energy systems engineering, chemical, environmental, and mechanical engineering, and sustainable development. It is also valuable to professionals in energy, heavy industries, and the chemical and pharmaceutical sectors, and policymakers with a focus on innovative clean, renewable energy.
Lean Combustion
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Author : Derek Dunn-Rankin
language : en
Publisher: Academic Press
Release Date : 2016-07-01
Lean Combustion written by Derek Dunn-Rankin and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-07-01 with Science categories.
Lean Combustion: Technology and Control, Second Edition outlines and explains the latest advances in lean combustion technology and systems. Combustion under sufficiently fuel-lean conditions can have the desirable attributes of high efficiency and low emissions. The book offers readers both the fundamentals and latest developments in how lean burn (broadly defined) can increase fuel economy and decrease emissions, while still achieving desired power output and performance. This volume brings together research and design of lean combustion systems across the technology spectrum in order to explore the state-of-the-art in lean combustion. Readers will learn about advances in the understanding of ultra-lean fuel mixtures and how new types of burners and approaches to managing heat flow can reduce problems often found with lean combustion (such as slow, difficult ignition and frequent flame extinction). This book offers abundant references and examples of real-world applications. New to this edition are significantly revised chapters on IC engines and stability/oscillations, and new case studies and examples. Written by a team of experts, this contributed reference book aims to teach its reader to maximize efficiency and minimize both economic and environmental costs. - Presents a comprehensive collection of lean burn technology across potential applications, allowing readers to compare and contrast similarities and differences - Provides an extensive update on IC engines including compression ignition (diesel), spark ignition, and homogeneous charge compression ignition (HCCI) - Includes an extensive revision to the Stability/Oscillations chapter - Includes use of alternative fuels such as biogas and hydrogen for relevant technologies - Covers new developments in lean combustion using high levels of pre-heat and heat recirculating burners, as well as the active control of lean combustion instabilities
107 2 Hearings Department Of The Interior And Related Agencies Appropriations For 2003 Part 5 April 18 2002
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Author :
language : en
Publisher:
Release Date : 2002
107 2 Hearings Department Of The Interior And Related Agencies Appropriations For 2003 Part 5 April 18 2002 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
108 1 Hearings Department Of The Interior And Related Agencies Appropriations For 2004 Part 5 2003
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Author :
language : en
Publisher:
Release Date : 2003
108 1 Hearings Department Of The Interior And Related Agencies Appropriations For 2004 Part 5 2003 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Department Of The Interior And Related Agencies Appropriations For
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Author : United States. Congress. Senate. Committee on Appropriations
language : en
Publisher:
Release Date : 2004
Department Of The Interior And Related Agencies Appropriations For written by United States. Congress. Senate. Committee on Appropriations and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Department Of The Interior And Related Agencies Appropriations For Fiscal Year 2003
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Author : United States. Congress. Senate. Committee on Appropriations. Subcommittee on the Department of the Interior and Related Agencies
language : en
Publisher:
Release Date : 2003
Department Of The Interior And Related Agencies Appropriations For Fiscal Year 2003 written by United States. Congress. Senate. Committee on Appropriations. Subcommittee on the Department of the Interior and Related Agencies and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Political Science categories.
108 1 Senate Hearings Department Of The Interior And Related Agencies Appropriations For Fiscal Year 2004 S Hrg 108 203 March 20 2003
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Author :
language : en
Publisher:
Release Date : 2004
108 1 Senate Hearings Department Of The Interior And Related Agencies Appropriations For Fiscal Year 2004 S Hrg 108 203 March 20 2003 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.