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Cycle To Cycle Combustion Variations In A Spark Ignition Engine Operating At Idle
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Book Synopsis Cycle-to-cycle Combustion Variations in a Spark-ignition Engine Operating at Idle by : Peter Christopher Hinze
Download or read book Cycle-to-cycle Combustion Variations in a Spark-ignition Engine Operating at Idle written by Peter Christopher Hinze and published by . This book was released on 1997 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of Fuel Economy Technologies for Light-Duty Vehicles by : National Research Council
Download or read book Assessment of Fuel Economy Technologies for Light-Duty Vehicles written by National Research Council and published by National Academies Press. This book was released on 2011-06-03 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various combinations of commercially available technologies could greatly reduce fuel consumption in passenger cars, sport-utility vehicles, minivans, and other light-duty vehicles without compromising vehicle performance or safety. Assessment of Technologies for Improving Light Duty Vehicle Fuel Economy estimates the potential fuel savings and costs to consumers of available technology combinations for three types of engines: spark-ignition gasoline, compression-ignition diesel, and hybrid. According to its estimates, adopting the full combination of improved technologies in medium and large cars and pickup trucks with spark-ignition engines could reduce fuel consumption by 29 percent at an additional cost of $2,200 to the consumer. Replacing spark-ignition engines with diesel engines and components would yield fuel savings of about 37 percent at an added cost of approximately $5,900 per vehicle, and replacing spark-ignition engines with hybrid engines and components would reduce fuel consumption by 43 percent at an increase of $6,000 per vehicle. The book focuses on fuel consumption-the amount of fuel consumed in a given driving distance-because energy savings are directly related to the amount of fuel used. In contrast, fuel economy measures how far a vehicle will travel with a gallon of fuel. Because fuel consumption data indicate money saved on fuel purchases and reductions in carbon dioxide emissions, the book finds that vehicle stickers should provide consumers with fuel consumption data in addition to fuel economy information.
Book Synopsis Mixture Formation in Spark-Ignition Engines by : Hans Peter Lenz
Download or read book Mixture Formation in Spark-Ignition Engines written by Hans Peter Lenz and published by Springer. This book was released on 2013-11-11 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twentyfour years have gone by since the publication of K. Lohner and H. Muller's comprehen sive work "Gemischbildung und Verbrennung im Ottomotor" in 1967 [1.1]' Naturally, the field of mixture formation and combustion in the spark-ignition engine has wit nessed great technological advances and many new findings in the intervening years, so that the time seemed ripe for presenting a summary of recent research and developments. There fore, I gladly took up the suggestion of the editors of this series of books, Professor Dr. H. List and Professor Dr. A. Pischinger, to write a book summarizing the present state of the art. A center of activity of the Institute of Internal-Combustion Engines and Automotive Engineering at the Vienna Technical University, which I am heading, is the field of mixture formation -there fore, many new results that have been achieved in this area in collaboration with the respective industry have been included in this volume. The basic principles of combustion are discussed only to that extent which seemect necessary for an understanding of the effects of mixture formation. The focal point of this volume is the mixture formation in spark-ignition engines, covering both the theory and actual design of the mixture formation units and appropriate intake manifolds. Also, the related measurement technology is explained in this work.
Book Synopsis Cycle-By-Cycle Variation in Spark Ignition Internal Combustion Engines by :
Download or read book Cycle-By-Cycle Variation in Spark Ignition Internal Combustion Engines written by and published by . This book was released on 1999 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this work was to extend the engine cycle simulation used by the Oxford Internal Combustion Engine Group to enable it to perform cycle-by-cycle modelling. A literature review concluded that the most appropriate metric for quantifying the cyclic variation was the coefficient of variation of the indicated mean effective pressure, and that for zero dimensional computer simulations, the most sensible parameter to perturb for cycle-by-cycle modelling was the burn rate. Modelling attempts using burn rate information alone resulted in an under-prediction of the cyclic variability exhibited by the engine. The work then examined a two-zone polytropic process model in an attempt to improve burn rate estimation. The model proved unreliable for burn rate calculations. The Rassweiler and Withrow method was then modified to include both the compression and expansion indices throughout the combustion period. The technique proved viable, but was not used because the slow burn up of the significant crevice mass in the experimental engine made calculation of an accurate expansion index doubtful. A further cause of the under-prediction in cyclic variability was postulated to be incomplete combustion, which is not detected by the burn rate model. A completeness of combustion parameter was derived from information contained in the Rassweiler and Withrow analysis. This parameter was used along with burn rate variations to perturb the cycle simulation and resulted in good cycle-by-cycle agreement between the experimental data and the modelled data in terms of mean effective pressure, maximum pressure, and the phasing of maximum pressure. Cyclic measurements of NO showed that the technique did not predict the cyclic variability in NO formation, and this was attributed to the sensitivity of NO formation to parameters that were not allowed to vary on a cyclic basis within the model (such as residuals).
Book Synopsis Cycle by Cycle Combustion Variability in Spark Ignition Engine Emissions by : Laurence Goldsworthy
Download or read book Cycle by Cycle Combustion Variability in Spark Ignition Engine Emissions written by Laurence Goldsworthy and published by . This book was released on 1978 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cycle-by-cycle Variation in Spark Ignition Combustion Engines by : Jeffrey K. Ball
Download or read book Cycle-by-cycle Variation in Spark Ignition Combustion Engines written by Jeffrey K. Ball and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis FLUID MOTION: EFFECT ON CYCLE-TO-CYCLE COMBUSTION VARIATION, FLAME DEVELOPMENT, AND SPARK DELIVERY IN SPARK-IGNITION ENGINES. by : PHILIP SHAFER KELLER
Download or read book FLUID MOTION: EFFECT ON CYCLE-TO-CYCLE COMBUSTION VARIATION, FLAME DEVELOPMENT, AND SPARK DELIVERY IN SPARK-IGNITION ENGINES. written by PHILIP SHAFER KELLER and published by . This book was released on 1991 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: in the determination of the cycle-resolved mean velocity, the greater the correlation.
Book Synopsis Cycle-by-cycle Variation in Spark Ignition Internal Combustion Engines by : Dr. Jeffrey K. Ball
Download or read book Cycle-by-cycle Variation in Spark Ignition Internal Combustion Engines written by Dr. Jeffrey K. Ball and published by . This book was released on 1998 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this work was to extend the engine cycle simulation used by the Oxford Internal Combustion Engine Group to enable it to perform cycle-by-cycle modelling. A literature review concluded that the most appropriate metric for quantifying the cyclic variation was the coefficient of variation of the indicated mean effective pressure, and that for zero dimensional computer simulations, the most sensible parameter to perturb for cycle-by-cycle modelling was the burn rate. Modelling attempts using burn rate information alone resulted in an under-prediction of the cyclic variability exhibited by the engine. The work then examined a two-zone polytropic process model in an attempt to improve burn rate estimation. The model proved unreliable for burn rate calculations. The Rassweiler and Withrow method was then modified to include both the compression and expansion indices throughout the combustion period. The technique proved viable, but was not used because the slow burn up of the significant crevice mass in the experimental engine made calculation of an accurate expansion index doubtful. A further cause of the under-prediction in cyclic variability was postulated to be incomplete combustion, which is not detected by the burn rate model. A completeness of combustion parameter was derived from information contained in the Rassweiler and Withrow analysis. This parameter was used along with burn rate variations to perturb the cycle simulation and resulted in good cycle-by-cycle agreement between the experimental data and the modelled data in terms of mean effective pressure, maximum pressure, and the phasing of maximum pressure. Cyclic measurements of NO showed that the technique did not predict the cyclic variability in NO formation, and this was attributed to the sensitivity of NO formation to parameters that were not allowed to vary on a cyclic basis within the model (such as residuals).
Book Synopsis On Cycle to Cycle Variations in Spark Ignition Engines by : Bengt Johansson
Download or read book On Cycle to Cycle Variations in Spark Ignition Engines written by Bengt Johansson and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Turbulence on Flame Initiation and Combustion Cyclic Variation in Spark Ignition Engines by : Mazen Hammoud
Download or read book Effect of Turbulence on Flame Initiation and Combustion Cyclic Variation in Spark Ignition Engines written by Mazen Hammoud and published by . This book was released on 1996 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis La France restablie, ov les pressantes exortations à ses peuples, pour les obliger à l'vnion, à la concorde, & à la res-joüissance, en faveur de la paix & des lys florissans by :
Download or read book La France restablie, ov les pressantes exortations à ses peuples, pour les obliger à l'vnion, à la concorde, & à la res-joüissance, en faveur de la paix & des lys florissans written by and published by . This book was released on 1649 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Burn Modes and Prior-cycle Effects on Cyclic Variations in Lean-burn Spark-ignition Engine Combustion by : Jay K. Martin
Download or read book Burn Modes and Prior-cycle Effects on Cyclic Variations in Lean-burn Spark-ignition Engine Combustion written by Jay K. Martin and published by . This book was released on 1988 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reciprocating Engine Combustion Diagnostics by : Rakesh Kumar Maurya
Download or read book Reciprocating Engine Combustion Diagnostics written by Rakesh Kumar Maurya and published by Springer. This book was released on 2019-03-19 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis STUDY OF SPARK DISCHARGE AND CYCLE-TO-CYCLE COMBUSTION VARIATIONS USING OPTICAL DIAGNOSTICS by :
Download or read book STUDY OF SPARK DISCHARGE AND CYCLE-TO-CYCLE COMBUSTION VARIATIONS USING OPTICAL DIAGNOSTICS written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : Combustion plays a dominant role in power generation and transportation. In spark ignition (SI) engines, the combustion process is originated from an electrical discharge within the spark plug electrodes. One important physical parameter affecting the spark discharge process and subsequent flame kernel propagation is the in-cylinder crossflow motion. Increasing the crossflow velocity generates turbulence in the combustion chamber. This is attributed to the spark channel being elongated at higher crossflow velocities. A longer spark channel length contains a higher discharge voltage which can induce a new re-spark across the spark plug electrodes. Furthermore, a longer spark channel expands the spatial spark discharge volume, affecting the initial formation and propagation of the flame kernel. Understanding the flame evolution physics in the cylinder and the corresponding cyclic variability in the combustion process under turbulent flows are of utmost importance to increasing efficiency of advanced engine technologies. In particular, knowledge of the cycle-to-cycle variations in combustion could potentially improve engine efficiency and performance including fuel economy, driveability, and emissions. Therefore, the main goal of this research is to understand the effects of high-speed crossflows on the initiation and development of the spark discharge and cyclic flame kernel propagation using optical diagnostics. Ignition tests are conducted in an optically accessible constant-volume spray and combustion vessel under various high-speed crossflows, pressures, and spark plug orientations to quantify the spark discharge process including the spark discharge channel, discharge duration, and glow discharge energy. Results show that increasing high-speed crossflows shortens the discharge duration while the glow discharge energy increases. A correlation between the spark channel length and electrical measurements is provided. Furthermore, cyclic variability is studied in an optical SI engine with retarded ignition timing under stoichiometric conditions. A spark sweep and various in-cylinder tumble motions are performed to develop a fundamental understanding of the cyclic variability at different operating conditions. Here, optical diagnostics, in-cylinder pressure measurements, and ion signal waveforms are analyzed to quantify the cycle-to-cycle variations of candidate combustion metrics including indicated mean effective pressure (IMEP) and mass fraction burned (MFB). Results provide a set of correlations among in-cylinder pressure measurements, ion signal data, and flame front data obtained from high-speed combustion images. It is also found that the cyclic variability is amplified with retarding the spark timing.
Book Synopsis The Determination of Spark-ignition Engine Apparent Heat Release Using Experimentally Obtained Pressure-time Data by : Bruce Douglas Peters
Download or read book The Determination of Spark-ignition Engine Apparent Heat Release Using Experimentally Obtained Pressure-time Data written by Bruce Douglas Peters and published by . This book was released on 1969 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cycle-by-cycle Variations of a Spark Ignition Engine by : R. K. Barton
Download or read book Cycle-by-cycle Variations of a Spark Ignition Engine written by R. K. Barton and published by . This book was released on 1970 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Spark Ignition Engine Combustion Model for the Analysis of Cyclic Variation and Combustion Stability at Lean Operating Conditions by : Hao Wu
Download or read book Study of Spark Ignition Engine Combustion Model for the Analysis of Cyclic Variation and Combustion Stability at Lean Operating Conditions written by Hao Wu and published by . This book was released on 2013 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: A fundamental combustion model for spark-ignition engine is studied in this report. The model is implemented in SIMULINK to simulate engine outputs (mass fraction burn and in-cylinder pressure) under various engine operation conditions. The combustion model includes a turbulent propagation and eddy burning processes based on literature [1]. The turbulence propagation and eddy burning processes are simulated by zero-dimensional method and the flame is assumed as sphere. To predict pressure, temperature and other in-cylinder variables, a two-zone thermodynamic model is used. The predicted results of this model match well with the engine test data under various engine speeds, loads, spark ignition timings and air fuel mass ratios. The developed model is used to study cyclic variation and combustion stability at lean (or diluted) combustion conditions. Several variation sources are introduced into the combustion model to simulate engine performance observed in experimental data. The relations between combustion stability and the introduced variation amount are analyzed at various lean combustion levels.
