Knocking In Gasoline Engines PDF Download
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Author | : Michael Günther |
Publisher | : Springer |
Total Pages | : 381 |
Release | : 2017-11-21 |
Genre | : Technology & Engineering |
ISBN | : 3319697609 |
Download Knocking in Gasoline Engines Book in PDF, ePub and Kindle
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 | : Matthias Kratzsch |
Publisher | : DCM Druck Center Meckenheim GmbH - www.druckcenter.de |
Total Pages | : 330 |
Release | : 2014-02-27 |
Genre | : Technology & Engineering |
ISBN | : 3944976037 |
Download Knocking in Gasoline Engines Book in PDF, ePub and Kindle
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 | : Ludwig Richter |
Publisher | : |
Total Pages | : 40 |
Release | : 1926 |
Genre | : Airplanes |
ISBN | : |
Download On the Knocking of Gasoline Engines Book in PDF, ePub and Kindle
It is of the greatest importance, not only for automobile engines, but also for every other kind of internal combustion engine, since it limits the degree of compression and the thermal efficiency and its investigation indicates ways for saving fuel.
Author | : Marc Sens |
Publisher | : expert verlag GmbH |
Total Pages | : 578 |
Release | : 2022-10-17 |
Genre | : Technology & Engineering |
ISBN | : 3816985440 |
Download International Conference on Ignition Systems for Gasoline Engines – International Conference on Knocking in Gasoline Engines Book in PDF, ePub and Kindle
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 | : Kalyan Kumar Srinivasan |
Publisher | : Springer |
Total Pages | : 419 |
Release | : 2018-11-03 |
Genre | : Technology & Engineering |
ISBN | : 9811333076 |
Download Natural Gas Engines Book in PDF, ePub and Kindle
This book covers the various advanced reciprocating combustion engine technologies that utilize natural gas and alternative fuels for transportation and power generation applications. It is divided into three major sections consisting of both fundamental and applied technologies to identify (but not limited to) clean, high-efficiency opportunities with natural gas fueling that have been developed through experimental protocols, numerical and high-performance computational simulations, and zero-dimensional, multizone combustion simulations. Particular emphasis is placed on statutes to monitor fine particulate emissions from tailpipe of engines operating on natural gas and alternative fuels.
Author | : Matthias Kratzsch |
Publisher | : |
Total Pages | : 361 |
Release | : 2010 |
Genre | : |
ISBN | : 9783816930471 |
Download Kocking at gasoline engines Book in PDF, ePub and Kindle
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 373 |
Release | : 2011-06-03 |
Genre | : Science |
ISBN | : 0309216389 |
Download Assessment of Fuel Economy Technologies for Light-Duty Vehicles Book in PDF, ePub and Kindle
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.
Author | : T. Priede |
Publisher | : |
Total Pages | : 22 |
Release | : 1989 |
Genre | : |
ISBN | : |
Download The Effect of Normal Combustion and Knock on Gasoline Engine Noise Book in PDF, ePub and Kindle
Author | : Andreas Manz |
Publisher | : Logos Verlag Berlin GmbH |
Total Pages | : 263 |
Release | : 2016-08-18 |
Genre | : Science |
ISBN | : 3832542817 |
Download Modeling of End-Gas Autoignition for Knock Prediction in Gasoline Engines Book in PDF, ePub and Kindle
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 | : Theodore Robert Corbett |
Publisher | : |
Total Pages | : 238 |
Release | : 1931 |
Genre | : Internal combustion engines |
ISBN | : |
Download Factors which Control Knocking in Gas Engine Cylinders Book in PDF, ePub and Kindle