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Author: Publisher: ISBN: Category : Languages : en Pages : 574
Book Description
Low temperature combustion (LTC) strategies can achieve high thermal efficiency with low engine-out NOx and soot emissions. However, controlling the timing and rate of heat release under LTC conditions in a consistent manner has proven to be difficult, and emissions of CO and unburned hydrocarbons (HC) are high. Several fueling strategies have been developed to create stratification of equivalence ratio and ignition delay such that heat release is retarded and lengthened, but these strategies typically result in a trade-off between efficiency and noise, a narrow operating range, or impractical boundary conditions, and the issue of high CO and HC emissions remains. In this research, a new strategy is proposed in which two fuels with different autoignition characteristics are introduced to the cylinder via multiple direct injections, allowing for greater control and range of reactivity and equivalence ratio distribution, as well as the possibility of mixed combustion modes. A series of experiments detail the development of the fueling strategy, an exploration of the parameters contributing to noise and emissions, a pathway to practical high-load operation, and a comparison to existing LTC strategies. By direct-injecting two fuels, it is possible to gain a new level of control over the shape and stability of the heat release event, along with the ability to combine and exploit the practical benefits of existing combustion strategies in a manner that was previously impossible.
Author: Publisher: ISBN: Category : Languages : en Pages : 574
Book Description
Low temperature combustion (LTC) strategies can achieve high thermal efficiency with low engine-out NOx and soot emissions. However, controlling the timing and rate of heat release under LTC conditions in a consistent manner has proven to be difficult, and emissions of CO and unburned hydrocarbons (HC) are high. Several fueling strategies have been developed to create stratification of equivalence ratio and ignition delay such that heat release is retarded and lengthened, but these strategies typically result in a trade-off between efficiency and noise, a narrow operating range, or impractical boundary conditions, and the issue of high CO and HC emissions remains. In this research, a new strategy is proposed in which two fuels with different autoignition characteristics are introduced to the cylinder via multiple direct injections, allowing for greater control and range of reactivity and equivalence ratio distribution, as well as the possibility of mixed combustion modes. A series of experiments detail the development of the fueling strategy, an exploration of the parameters contributing to noise and emissions, a pathway to practical high-load operation, and a comparison to existing LTC strategies. By direct-injecting two fuels, it is possible to gain a new level of control over the shape and stability of the heat release event, along with the ability to combine and exploit the practical benefits of existing combustion strategies in a manner that was previously impossible.
Author: Rakesh Kumar Maurya Publisher: Springer ISBN: 3319685082 Category : Technology & Engineering Languages : en Pages : 553
Book Description
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. .
Author: Rakesh Kumar Maurya Publisher: Springer ISBN: 3030119548 Category : Technology & Engineering Languages : en Pages : 616
Book Description
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.
Author: National Academies of Sciences, Engineering, and Medicine Publisher: National Academies Press ISBN: 0309496357 Category : Science Languages : en Pages : 399
Book Description
Medium- and heavy-duty trucks, motor coaches, and transit buses - collectively, "medium- and heavy-duty vehicles", or MHDVs - are used in every sector of the economy. The fuel consumption and greenhouse gas emissions of MHDVs have become a focus of legislative and regulatory action in the past few years. This study is a follow-on to the National Research Council's 2010 report, Technologies and Approaches to Reducing the Fuel Consumption of Medium-and Heavy-Duty Vehicles. That report provided a series of findings and recommendations on the development of regulations for reducing fuel consumption of MHDVs. On September 15, 2011, NHTSA and EPA finalized joint Phase I rules to establish a comprehensive Heavy-Duty National Program to reduce greenhouse gas emissions and fuel consumption for on-road medium- and heavy-duty vehicles. As NHTSA and EPA began working on a second round of standards, the National Academies issued another report, Reducing the Fuel Consumption and Greenhouse Gas Emissions of Medium- and Heavy-Duty Vehicles, Phase Two: First Report, providing recommendations for the Phase II standards. This third and final report focuses on a possible third phase of regulations to be promulgated by these agencies in the next decade.
Author: Avinash Kumar Agarwal Publisher: Springer Nature ISBN: 9811684189 Category : Technology & Engineering Languages : en Pages : 367
Book Description
This book is based on advanced combustion technologies currently employed in internal combustion engines. It discusses different strategies for improving conventional diesel combustion. The volume includes chapters on low-temperature combustion techniques of compression-ignition engines which results in significant reduction of NOx and soot emissions. The content also highlights newly evolved gasoline compression technology and optical techniques in advanced gasoline direct injection engines. the research and its outcomes presented here highlight advancements in combustion technologies, analysing various issues related to in-cylinder combustion, pollutant formation and alternative fuels. This book will be of interest to those in academia and industry involved in fuels, IC engines, engine combustion research.
Author: Gabriele Di Blasio Publisher: Springer Nature ISBN: 981168751X Category : Technology & Engineering Languages : en Pages : 251
Book Description
This book discusses the impact of fuels characteristics and their effects on the combustion processes in internal combustion engines. It includes the analysis of a variety of biofuels (alcohol fuels and biodiesel) and biogases (natural gas, hydrogen, etc.), providing valuable information related to consequent effects on performance and emissions. The contents focus on recent results and current trends of fuel utilization in the transport sector. State-of-the-art of clean fuels application are also discussed. Thighs book will be of interest to those in academia and industry involved in fuels, IC engines, engine instrumentation, and environmental research.
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Author: Rakesh Kumar Maurya
Author: Hongsheng Guo
Author: Rakesh Kumar Maurya
Author: National Academies of Sciences, Engineering, and Medicine
Author: Sundar Rajan Krishnan
Author: Avinash Kumar Agarwal
Author: Gabriele Di Blasio
Author: Craig David Marriott
Author: Li Fan