Transient Effects Of Load And Speed On Low Temperature Diesel Combustion
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Transient Effects Of Load And Speed On Low Temperature Diesel Combustion
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Author : Daniel Ryan Williams
language : en
Publisher:
Release Date : 2008
Transient Effects Of Load And Speed On Low Temperature Diesel Combustion written by Daniel Ryan Williams and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Experimental Investigation Of Transient Operation And Low Temperature Combustion In A Light Duty Diesel Engine
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Author :
language : en
Publisher:
Release Date : 2012
Experimental Investigation Of Transient Operation And Low Temperature Combustion In A Light Duty Diesel Engine written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Detailed and highly time resolved experimental measurements were used to characterize the effects of transient operation on the performance of a light duty diesel engine, and to identify the physical processes responsible for transient-specific combustion behavior. The engine response to transient events varied with the size and type of transition and the combustion strategy used, but the underlying processes were similar in all cases. Differences in the response rate of the fuel and air systems caused large variations in the equivalence ratio of the combustion charge during transient events. For moderate to low load conditions, this was primarily due to the discrepancy between the instantaneous intake air flow rate and the composition of the intake charge caused by storage of exhaust gas in the EGR system. This effect was particularly significant for early injection LTC operation due to higher EGR rates and greater dependence of combustion phasing on intake charge composition. Individual combustion cycles during transient events were compared to steady state operation at the same speed and load to quantify the differences in physical conditions. The greatest effect on combustion and emissions was due to differences in intake charge composition, which varied significantly between transient and steady state operation. The response time of the common rail pressure also contributed to transient behavior in situations where the target pressure varied with changes in speed or load. During larger load transitions, thermal inertia of the engine system had a significant effect on emissions, particularly UHC, but did not influence the combustion phasing or heat release rate. The characteristic rates of change of the charge gas, fluid, and physical component temperatures in response to speed or load transitions were much slower than those of other variables such as pressures or flow rates, and were consistent with concurrent variations in engine-out emissions levels. Numerous mechanisms by which thermal inertia could affect emissions formation were identified, including variation of the intake manifold charge gas temperature, in-cylinder heat transfer, and changing physical properties of the fuel.
Implementation And Transient Effects Of Low Pressure Egr On Low Temperature Diesel Combustion
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Author : Chris Meyer
language : en
Publisher:
Release Date : 2010
Implementation And Transient Effects Of Low Pressure Egr On Low Temperature Diesel Combustion written by Chris Meyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Diesel Engine Transient Operation
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Author : Constantine D. Rakopoulos
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-03-10
Diesel Engine Transient Operation written by Constantine D. Rakopoulos and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-03-10 with Technology & Engineering categories.
Traditionally, the study of internal combustion engines operation has focused on the steady-state performance. However, the daily driving schedule of automotive and truck engines is inherently related to unsteady conditions. In fact, only a very small portion of a vehicle’s operating pattern is true steady-state, e. g. , when cruising on a motorway. Moreover, the most critical conditions encountered by industrial or marine engines are met during transients too. Unfortunately, the transient operation of turbocharged diesel engines has been associated with slow acceleration rate, hence poor driveability, and overshoot in particulate, gaseous and noise emissions. Despite the relatively large number of published papers, this very important subject has been treated in the past scarcely and only segmentally as regards reference books. Merely two chapters, one in the book Turbocharging the Internal Combustion Engine by N. Watson and M. S. Janota (McMillan Press, 1982) and another one written by D. E. Winterbone in the book The Thermodynamics and Gas Dynamics of Internal Combustion Engines, Vol. II edited by J. H. Horlock and D. E. Winterbone (Clarendon Press, 1986) are dedicated to transient operation. Both books, now out of print, were published a long time ago. Then, it seems reasonable to try to expand on these pioneering works, taking into account the recent technological advances and particularly the global concern about environmental pollution, which has intensified the research on transient (diesel) engine operation, typically through the Transient Cycles certification of new vehicles.
Optimizing Low Temperature Diesel Combustion Ltc D Freedomcar And Vehicle Technologies Program Solicitation For University Research And Graduate Automotice Technology Education Gate Centers Of Excellence
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Author :
language : en
Publisher:
Release Date : 2009
Optimizing Low Temperature Diesel Combustion Ltc D Freedomcar And Vehicle Technologies Program Solicitation For University Research And Graduate Automotice Technology Education Gate Centers Of Excellence written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
The engine industry is currently facing severe emissions mandates. Pollutant emissions from mobile sources are a major source of concern. For example, US EPA mandates require emissions of particulate and nitrogen oxides (NOx) from heavy-duty diesel engine exhaust to drop at least 90 percent between 1998 and 2010. Effective analysis of the combustion process is required to guide the selection of technologies for future development since exhaust after-treatment solutions are not currently available that can meet the required emission reduction goals. The goal of this project is to develop methods to optimize and control Low Temperature Combustion Diesel technologies (LTC-D) that offers the potential of nearly eliminating engine NOx and particulate emissions at reduced cost over traditional methods by controlling pollutant emissions in-cylinder. The work was divided into 5 Tasks, featuring experimental and modeling components: 1.) Fundamental understanding of LTC-D and advanced model development, 2.) Experimental investigation of LTC-D combustion control concepts, 3.) Application of detailed models for optimization of LTC-D combustion and emissions, 4.) Impact of heat transfer and spray impingement on LTC-D combustion, and 5.) Transient engine control with mixed-mode combustion. As described in the final report (December 2008), outcomes from the research included providing guidelines to the engine and energy industries for achieving optimal low temperature combustion operation through using advanced fuel injection strategies, and the potential to extend low temperature operation through manipulation of fuel characteristics. In addition, recommendations were made for improved combustion chamber geometries that are matched to injection sprays and that minimize wall fuel films. The role of fuel-air mixing, fuel characteristics, fuel spray/wall impingement and heat transfer on LTC-D engine control were revealed. Methods were proposed for transient engine operation during load and speed changes to extend LTC-D engine operating limits, power density and fuel economy. Low emissions engine design concepts were proposed and evaluated.
Investigation Of Transient Emissions And Mixed Mode Combustion For A Light Duty Diesel Engine
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Author : Jonathan L. Burton
language : en
Publisher:
Release Date : 2008
Investigation Of Transient Emissions And Mixed Mode Combustion For A Light Duty Diesel Engine written by Jonathan L. Burton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
The Effects Of Discrete Transients In Speed And Load On Diesel Engine Exhaust Emissions
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Author : Timothy J. Callahan
language : en
Publisher:
Release Date : 1985
The Effects Of Discrete Transients In Speed And Load On Diesel Engine Exhaust Emissions written by Timothy J. Callahan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Diesel motor exhaust gas categories.
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. .
Effect Of Particulate Matter And Exhaust Gas Composition On Diesel Particulate Filter Regenration
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Author : Amy E. Fischer
language : en
Publisher:
Release Date : 2009
Effect Of Particulate Matter And Exhaust Gas Composition On Diesel Particulate Filter Regenration written by Amy E. Fischer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Combustion Engines
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Author : Aman Gupta
language : en
Publisher: John Wiley & Sons
Release Date : 2017-02-03
Combustion Engines written by Aman Gupta and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-02-03 with Technology & Engineering categories.
Vehicle noise, vibration, and emissions are only a few of the factors that can have a detrimental effects on overall performance of an engine. These aspects are benchmarks for choice of customers while choosing a vehicle or for engineers while choosing an engine for industrial applications. It is important that mechanical and automotive engineers have some knowledge in this area, as a part of their well-rounded training for designing and selecting various types of engines. This volume is a valuable introductory text and a handy reference for any engineer, manager, or technician working in this area. The automotive industry, and other industries that make use of engines in their industrial applications, account for billions, or even trillions, of dollars of revenue worldwide and are important in the daily lives of many, if not most, of the people living on this planet. This is an area that affects a staggering number of people, and the information needed by engineers and technicians concerning the performance of various types of engines is of paramount importance in designing and selecting engines and the processes into which they are introduced.