Knocking In Gasoline Engines

Author : Michael Günther,Marc Sens
Publisher : Springer
Page : 384 pages
File Size : 45,7 Mb
Release : 2017-11-21
Category : Technology & Engineering
ISBN : 9783319697604

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Knocking in Gasoline Engines by Michael Günther,Marc Sens Pdf

The book includes the papers presented at the conference discussing approaches to prevent or reliably control knocking and other irregular combustion events. The majority of today’s highly efficient gasoline engines utilize downsizing. High mean pressures produce increased knocking, which frequently results in a reduction in the compression ratio at high specific powers. Beyond this, the phenomenon of pre-ignition has been linked to the rise in specific power in gasoline engines for many years. Charge-diluted concepts with high compression cause extreme knocking, potentially leading to catastrophic failure. The introduction of RDE legislation this year will further grow the requirements for combustion process development, as residual gas scavenging and enrichment to improve the knock limit will be legally restricted despite no relaxation of the need to reach the main center of heat release as early as possible. New solutions in thermodynamics and control engineering are urgently needed to further increase the efficiency of gasoline engines.

Author : Marc Sens
Publisher : expert verlag GmbH
Page : 578 pages
File Size : 55,5 Mb
Release : 2022-10-17
Category : Technology & Engineering
ISBN : 9783816985440

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International Conference on Ignition Systems for Gasoline Engines – International Conference on Knocking in Gasoline Engines by Marc Sens Pdf

For decades, scientists and engineers have been working to increase the efficiency of internal combustion engines. For spark-ignition engines, two technical questions in particular are always in focus: 1. How can the air/fuel mixture be optimally ignited under all possible conditions? 2. How can undesirable but recurrent early and self-ignitions in the air/fuel mixture be avoided? Against the background of the considerable efficiency increases currently being sought in the context of developments and the introduction of new fuels, such as hydrogen, methanol, ammonia and other hydrogen derivatives as well as biofuels, these questions are more in the focus than ever. In order to provide a perfect exchange platform for the community of combustion process and system developers from research and development, IAV has organized this combined conference, chaired by Marc Sens. The proceedings presented here represent the collection of all the topics presented at the event and are thus intended to serve as an inspiration and pool of ideas for all interested parties.

Author : Matthias Kratzsch,Michael Günther
Publisher : Unknown
Page : 361 pages
File Size : 47,9 Mb
Release : 2010
Category : Electronic
ISBN : 3816930476

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Kocking at gasoline engines by Matthias Kratzsch,Michael Günther Pdf

Author : Matthias Kratzsch,Michael Günther
Publisher : DCM Druck Center Meckenheim GmbH - www.druckcenter.de
Page : 330 pages
File Size : 49,9 Mb
Release : 2014-02-27
Category : Technology & Engineering
ISBN : 9783944976037

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Knocking in Gasoline Engines by Matthias Kratzsch,Michael Günther Pdf

The European Commission is planning to limit emissions under real driving conditions up to high engine loads. RDE (real driving emissions) legislation demands the complete conversion of exhaust gases in the catalytic converter which can only be achieved for spark-ignition engines at lambda=1. High exhaust gas temperatures resulting from late centers of heat release caused by knock can then no longer be limited by mixture enrichment. In addition, higher mean effective pressures are needed to improve the efficiency of SI engines. A strong tendency to knock during stoichiometric combustion in conjunction with high mean effective pressure places exacting demands on the SI engine combustion process. The focus of engine development consequently remains on reducing knock and on avoiding irregular combustion events. In particular, phenomena such as pre-ignition, which is typically observed in downsizing concepts, or extreme knock of the type frequently occurring in highcompression lean-burn concepts, are immense challenges to developers. Contents: Potentials and limits of downsizing | Mega-knock in super-charged gasoline engines interpreted as a localized developing detonation | A contribution to better understanding the pre-ignition phenomenon in highly charged internal combustion engines with direct fuel injection | Minimising autoignition for optimum efficiency in high specific output spark-ignited engines | Reduction in knocking intensity of an SI engine by in-cylinder temperature stratification | New approach to the determination of knock onset | Cylinder pressure-based knock detection – challenges in cylinder pressure indication and application in a new engine-based fuel test method | Irregular combustion: development and calibration of highly boosted SI engines | Optically diagnosing combustion anomalies as part of designing the combustion process | Using surface thermocouples and light conductor measurements to examine the thermal load on a gasoline engine’s components during knocking engine operation | Comparative analysis of low-speed pre-ignition phenomena in SI gasoline and dual fuel diesel-methane engines | LEC-GPN – a new Index for assessing the knock behavior of gaseous fuels for large engines | A statistical modeling approach with detailed chemical kinetics for use in 3DCFD engine knock predictions | Investigation on knocking combustion with reaction kinetics for a turbocharged SIDI engine | Knocking simulation at Mercedes-Benz – application in series production development | The DELTA knocking control – the necessary paradigm shift for engines with high power density | Artificial Intelligence for knock detection | Knock detection strategies based on engine acoustic emission analysis | Continental’s pre-ignition and glow ignition function – detection and avoidance of irregular combustions | Pre-ignition analysis on a turbocharged gasoline engine with direct injection | Knock and irregular combustion – challenges for the new turbocharged, highperformance four-cylinder AMG engine | Simulations and experimental investigations of intermittent pre-ignition series in a turbocharged DISI engine Target group: This book addresses engine developers working for car manufacturers and suppliers. With regard to knocking combustion in spark-ignition engines – irregular combustion – it provides an overview of thermodynamic principals, approaches to measurement and computation together with current trends for mass-production development.

Author : Rakesh Kumar Maurya
Publisher : Springer
Page : 616 pages
File Size : 45,6 Mb
Release : 2019-03-19
Category : Technology & Engineering
ISBN : 9783030119546

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Reciprocating Engine Combustion Diagnostics by Rakesh Kumar Maurya Pdf

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 : Hermann Hiereth,Peter Prenninger
Publisher : Springer Science & Business Media
Page : 283 pages
File Size : 44,8 Mb
Release : 2007-11-04
Category : Technology & Engineering
ISBN : 9783211471135

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Charging the Internal Combustion Engine by Hermann Hiereth,Peter Prenninger Pdf

This book covers all aspects of supercharging internal combustion engines. It details charging systems and components, the theoretical basic relations between engines and charging systems, as well as layout and evaluation criteria for best interaction. Coverage also describes recent experiences in design and development of supercharging systems, improved graphical presentations, and most advanced calculation and simulation tools.

Author : Richard Viskup
Publisher : Unknown
Page : 202 pages
File Size : 52,9 Mb
Release : 2020-02
Category : Technology & Engineering
ISBN : 9781789852486

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Diesel and Gasoline Engines by Richard Viskup Pdf

The internal combustion engine was invented around 1790 by various scientists and engineers worldwide. Since then the engines have gone through many modifications and improvements. Today, different applications of engines form a significant technological importance in our everyday lives, leading to the evolution of our modern civilization. The invention of diesel and gasoline engines has definitely changed our lifestyles as well as shaped our priorities. The current engines serve innumerable applications in various types of transportation, in harsh environments, in construction, in diverse industries, and also as back-up power supply systems for hospitals, security departments, and other institutions. However, heavy duty or light duty engines have certain major disadvantages, which are well known to everyone. With the increasing usage of diesel and gasoline engines, and the constantly rising number of vehicles worldwide, the main concern nowadays is engine exhaust emissions. This book looks at basic phenomena related to diesel and gasoline engines, combustion, alternative fuels, exhaust emissions, and mitigations.

Author : Andreas Manz
Publisher : Logos Verlag Berlin GmbH
Page : 263 pages
File Size : 42,8 Mb
Release : 2016-08-18
Category : Science
ISBN : 9783832542818

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Modeling of End-Gas Autoignition for Knock Prediction in Gasoline Engines by Andreas Manz Pdf

Downsizing of modern gasoline engines with direct injection is a key concept for achieving future CO22 emission targets. However, high power densities and optimum efficiency are limited by an uncontrolled autoignition of the unburned air-fuel mixture, the so-called spark knock phenomena. By a combination of three-dimensional Computational Fluid Dynamics (3D-CFD) and experiments incorporating optical diagnostics, this work presents an integral approach for predicting combustion and autoignition in Spark Ignition (SI) engines. The turbulent premixed combustion and flame front propagation in 3D-CFD is modeled with the G-equation combustion model, i.e. a laminar flamelet approach, in combination with the level set method. Autoignition in the unburned gas zone is modeled with the Shell model based on reduced chemical reactions using optimized reaction rate coefficients for different octane numbers (ON) as well as engine relevant pressures, temperatures and EGR rates. The basic functionality and sensitivities of improved sub-models, e.g. laminar flame speed, are proven in simplified test cases followed by adequate engine test cases. It is shown that the G-equation combustion model performs well even on unstructured grids with polyhedral cells and coarse grid resolution. The validation of the knock model with respect to temporal and spatial knock onset is done with fiber optical spark plug measurements and statistical evaluation of individual knocking cycles with a frequency based pressure analysis. The results show a good correlation with the Shell autoignition relevant species in the simulation. The combined model approach with G-equation and Shell autoignition in an active formulation enables a realistic representation of thin flame fronts and hence the thermodynamic conditions prior to knocking by taking into account the ignition chemistry in unburned gas, temperature fluctuations and self-acceleration effects due to pre-reactions. By the modeling approach and simulation methodology presented in this work the overall predictive capability for the virtual development of future knockproof SI engines is improved.

Author : Cearcy D. Miller
Publisher : Unknown
Page : 72 pages
File Size : 53,7 Mb
Release : 1946
Category : Combustion
ISBN : UOM:39015095014562

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Relation Between Spark-ignition Engine Knock, Detonation Waves, and Autoignition as Shown by High-speed Photography by Cearcy D. Miller Pdf

A critical review of literature bearing on the autoignition and detonation-wave theories of spark-ignition engine knock and on the nature of gas vibrations associated with combustion and knock results in the conclusion that neither the autoignition theory nor the detonation-wave theory is an adequate explanation of spark-ignition engine knock. A knock theory is proposed, combining the autoignition and detonation-wave theories, introducing the idea that the detonation wave develops in autoignited or afterburning gases, and ascribing comparatively low-pitched heavy knocks to autoignition but high-pitched pinging knocks to detonation waves with the possibility of combinations of the two types of knock.

Author : Cearcy D. Miller
Publisher : Unknown
Page : 26 pages
File Size : 48,9 Mb
Release : 1946
Category : Combustion
ISBN : UOM:39015095014570

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Analysis of Spark-ignition Engine Knock as Seen in Photographs Taken at 200,000 Frames a Second by Cearcy D. Miller Pdf

A motion-picture of the development of knock in a spark-ignition engine is presented, which consists of 20 photographs taken at intervals of 5 microseconds, or at a rate of 200,000 photographs a second, with an equivalent wide-open exposure time of 6.4 microseconds for each photograph. A motion picture of a complete combustion process, including the development of knock, taken at the rate of 40,000 photographs a second is also presented to assist the reader in orienting the photographs of the knock development taken at 200,000 frames per second are analyzed and the conclusion is made that the type of knock in the spark-ignition engine involving violent gas vibration originates as a self-propagating disturbance starting at a point in the burning or autoigniting gases and spreading out from that point through the incompletely burned gases at a rate as high as 6800 feet per second, or about twice the speed of sound in the burned gases. Apparent formation of free carbon particles in both the burning and the burned gas is observed within 10 microseconds after passage of the knock disturbance through the gases.

Author : Yanmar
Publisher : BoD – Books on Demand
Page : 98 pages
File Size : 42,6 Mb
Release : 2013-02
Category : Electronic
ISBN : 9783954272754

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Yanmar Diesel Engine Model 2 S by Yanmar Pdf

Reprint of the official service manual for Yanmar diesel engine model 2 S.

Author : United States. Temporary National Economic Committee
Publisher : Unknown
Page : 2464 pages
File Size : 51,6 Mb
Release : 1939
Category : Big business
ISBN : HARVARD:32044032276511

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Investigation of Concentration of Economic Power by United States. Temporary National Economic Committee Pdf

Author : Michael Günther,Marc Sens
Publisher : Unknown
Page : 300 pages
File Size : 45,6 Mb
Release : 2021-12-13
Category : Electronic
ISBN : 3816935443

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International Conference on Ignition Systems for Gasoline Engines - International Conference on Knocking in Gasoline Engines by Michael Günther,Marc Sens Pdf

Author : United States. Congress. House. Temporary National Economic Committee
Publisher : Unknown
Page : 1840 pages
File Size : 42,5 Mb
Release : 1940
Category : United States
ISBN : IND:30000106534377

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Investigation of Concentration of Economic Power by United States. Congress. House. Temporary National Economic Committee Pdf

Author : National Research Council,Division on Engineering and Physical Sciences,Board on Energy and Environmental Systems,Committee on the Assessment of Technologies for Improving Light-Duty Vehicle Fuel Economy
Publisher : National Academies Press
Page : 373 pages
File Size : 47,9 Mb
Release : 2011-06-03
Category : Science
ISBN : 9780309216388

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Assessment of Fuel Economy Technologies for Light-Duty Vehicles by National Research Council,Division on Engineering and Physical Sciences,Board on Energy and Environmental Systems,Committee on the Assessment of Technologies for Improving Light-Duty Vehicle Fuel Economy Pdf

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.