Technology & Engineering

Mixture Formation in Internal Combustion Engines

Author: Carsten Baumgarten

Publisher: Springer Science & Business Media

ISBN: 3540308369

Category: Technology & Engineering

Page: 294

View: 6604

A systematic control of mixture formation with modern high-pressure injection systems enables us to achieve considerable improvements of the combustion pr- ess in terms of reduced fuel consumption and engine-out raw emissions. However, because of the growing number of free parameters due to more flexible injection systems, variable valve trains, the application of different combustion concepts within different regions of the engine map, etc., the prediction of spray and m- ture formation becomes increasingly complex. For this reason, the optimization of the in-cylinder processes using 3D computational fluid dynamics (CFD) becomes increasingly important. In these CFD codes, the detailed modeling of spray and mixture formation is a prerequisite for the correct calculation of the subsequent processes like ignition, combustion and formation of emissions. Although such simulation tools can be viewed as standard tools today, the predictive quality of the sub-models is c- stantly enhanced by a more accurate and detailed modeling of the relevant pr- esses, and by the inclusion of new important mechanisms and effects that come along with the development of new injection systems and have not been cons- ered so far. In this book the most widely used mathematical models for the simulation of spray and mixture formation in 3D CFD calculations are described and discussed. In order to give the reader an introduction into the complex processes, the book starts with a description of the fundamental mechanisms and categories of fuel - jection, spray break-up, and mixture formation in internal combustion engines.
Technology & Engineering

Handbuch Verbrennungsmotor

Grundlagen, Komponenten, Systeme, Perspektiven

Author: Richard van Basshuysen,Fred Schäfer

Publisher: Springer-Verlag

ISBN: 3658109025

Category: Technology & Engineering

Page: 1385

View: 7513

Dieses Werk enthält auf über 1200 Seiten umfassende Informationen über Otto- und Dieselmotoren. In wissenschaftlich anschaulicher und gleichzeitig praxisrelevanter Form sind die Grundlagen, Komponenten, Systeme und Perspektiven dargestellt. Über 140 Autoren aus Theorie und Praxis haben dieses Wissen erarbeitet. Damit haben sowohl Theoretiker als auch Praktiker die Möglichkeit, sich in kompakter Form ausführlich über den neuesten Stand der Motorentechnik zu informieren. Neue Entwicklungen zur Hybridtechnik und alternativen Antrieben wurden aktualisiert. Das Literaturverzeichnis wurde auf über 1400 Stellen erweitert.
Computers

Modeling Engine Spray and Combustion Processes

Author: Gunnar Stiesch

Publisher: Springer Science & Business Media

ISBN: 9783540006824

Category: Computers

Page: 282

View: 5606

The utilization of mathematical models to numerically describe the performance of internal combustion engines is of great significance in the development of new and improved engines. Today, such simulation models can already be viewed as standard tools, and their importance is likely to increase further as available com puter power is expected to increase and the predictive quality of the models is constantly enhanced. This book describes and discusses the most widely used mathematical models for in-cylinder spray and combustion processes, which are the most important subprocesses affecting engine fuel consumption and pollutant emissions. The relevant thermodynamic, fluid dynamic and chemical principles are summarized, and then the application of these principles to the in-cylinder processes is ex plained. Different modeling approaches for the each subprocesses are compared and discussed with respect to the governing model assumptions and simplifica tions. Conclusions are drawn as to which model approach is appropriate for a specific type of problem in the development process of an engine. Hence, this book may serve both as a graduate level textbook for combustion engineering stu dents and as a reference for professionals employed in the field of combustion en gine modeling. The research necessary for this book was carried out during my employment as a postdoctoral scientist at the Institute of Technical Combustion (ITV) at the Uni versity of Hannover, Germany and at the Engine Research Center (ERC) at the University of Wisconsin-Madison, USA.
Technology & Engineering

Untersuchung der Potentiale der numerischen Strömungsberechnung zur Prognose der Partikelemissionen in Ottomotoren mit Direkteinspritzung

Author: Fabian Köpple

Publisher: Springer

ISBN: 3658111380

Category: Technology & Engineering

Page: 150

View: 2478

Fabian Köpple stellt einen durchgängigen Ansatz zur 3D-Berechnung der innermotorischen Vorgänge in Ottomotoren mit Direkteinspritzung vor. Dabei konnte er zeigen, dass unter Verwendung des erarbeiteten Modellierungskonzeptes die Auswirkungen verschiedener, die Gemischbildung und Verbrennung beeinflussender Parameter auf die Rußemissionen bewertet werden können. Da die verzögerte Verdunstung des an der Wand abgelagerten Kraftstoffs eine wesentliche Quelle der Rußemissionen ist, war die besondere Berücksichtigung der Modellierung der Spray-Wand-Interaktion ein wichtiger Aspekt dieser Dissertation. Insbesondere die Oberflächentemperatur des Kolbens hat dabei einen wichtigen Einfluss auf die Spray-Wand-Interaktion, weshalb der Autor Oberflächentemperaturmessungen auf dem Kolben eines Einzylinderaggregats durchführte. Insgesamt konnte durch den hier vorgestellten Ansatz die Prognose der Partikelemissionen mittels der numerischen Simulation deutlich verbessert werden.
Science

Internal combustion engines

Author: Paswan N.,Kadirov S.

Publisher: Мультимедийное издательство Стрельбицкого

ISBN: N.A

Category: Science

Page: N.A

View: 3206

The textbook “Internal Combustion Engines” by Professor Sarvar Kadirov and Dr. Nawal K. Paswan has been recommended by the Ministry of Higher Education of the Republic Of Uzbekistan, as the main textbook for students studying on the specialties: “Technical exploitation of automobiles” and “Landline transport machines”. The first version of the textbook in Russian was published under the title “Automobile and Tractor Engines” in 1990 by the publishing house “Uchitel” (Tashkent). This textbook has been bought by 15 countries of East for the Technical University Students (Iran, Turkey, Egypt, China, India and etc.).
Technology & Engineering

Aufladung der Verbrennungskraftmaschine

Author: Hermann Hiereth,Peter Prenninger

Publisher: Springer-Verlag

ISBN: 3709106508

Category: Technology & Engineering

Page: 273

View: 7886

Das Buch behandelt die Aufladung der Kolben-Verbrennungskraftmaschine. Dabei wird auf die Aufladegeräte und -systeme selbst, die theoretischen Zusammenhänge des Zusammenwirkens Motor und Auflade-Systeme sowie schlussendlich auf die Kriterien des Zusammenwirkens dieser System-Kombination – unter besonderer Berücksichtigung des Betriebsverhaltens – eingegangen. Es werden neue Erkenntnisse bei der Entwicklung und Adaption von Aufladesystemen, neue Darstellungsformen sowie die heute angewandten Berechnungs- und Simulationsverfahren vorgestellt, mit Beispielen erläutert und bewertet. Einen Schwerpunkt bildet das Betriebs- und Regelverhalten aufgeladener Verbrennungsmotoren in den verschiedenen Anwendungs- bzw. Einsatzgebieten. Eine Reihe ausgewählter Anwendungsbeispiele sowie ein Ausblick auf mögliche Weiterentwicklungen des Systems "Auflade-Motor" beschließen die Abhandlung.
Technology & Engineering

Dieselmotor-Management

Systeme und Komponenten

Author: Robert Bosch GmbH

Publisher: Springer-Verlag

ISBN: 9783528238735

Category: Technology & Engineering

Page: 501

View: 4297

Der Dieselmotor und die Einspritzanlage bilden eine untrennbare Einheit. In zunehmendem Maß gewinnt die Elektronik an Bedeutung, um die wachsenden Forderungen nach geringem Schadstoffausstoß und geringem Kraftstoffverbrauch zu erfüllen. Jüngste Beispiele hierfür sind das Unit Injector System UIS und das Speichereinspritzsystem Common Rail, das mit dem Piezo-Inline-Injektor die Möglichkeiten zur Verbrauchsreduzierung noch mal entscheidend verbessert. Die aktuellen Maßnahmen zur innermotorischen Emissionsminderung, aber auch zur nachträglichen Schadstoffreduzierung wie Partikelfilter, SCR-Katalysator, Speicherkatalysator und Oxidationskatalysator werden ausführlich erklärt.
Technology & Engineering

Internal Combustion Engine Handbook

Basics, Components, Systems, and Perspectives

Author: Richard Van Basshuysen,Fred Schäfer

Publisher: SAE

ISBN: 9780768011395

Category: Technology & Engineering

Page: 811

View: 677

Thorough in its presentation, this essential resource illustrates the latest level of knowledge in engine development, paying particular attention to the presentation of theory and practice in a balanced ratio. Almost 950 pages in length - with 1,250 illustrations and nearly 700 bibliographical references - the Internal Combustion Engine Handbook covers all of this component's complexities, including an insightful look into the internal combustion engine's future viability.
Technology & Engineering

Simulating Combustion

Simulation of combustion and pollutant formation for engine-development

Author: Günter Merker,Christian Schwarz,Gunnar Stiesch,Frank Otto

Publisher: Springer Science & Business Media

ISBN: 3540306269

Category: Technology & Engineering

Page: 402

View: 5921

The numerical simulation of combustion processes in internal combustion engines, including also the formation of pollutants, has become increasingly important in the recent years, and today the simulation of those processes has already become an indispensable tool when - veloping new combustion concepts. While pure thermodynamic models are well-established tools that are in use for the simulation of the transient behavior of complex systems for a long time, the phenomenological models have become more important in the recent years and have also been implemented in these simulation programs. In contrast to this, the thr- dimensional simulation of in-cylinder combustion, i. e. the detailed, integrated and continuous simulation of the process chain injection, mixture formation, ignition, heat release due to combustion and formation of pollutants, has been significantly improved, but there is still a number of challenging problems to solve, regarding for example the exact description of s- processes like the structure of turbulence during combustion as well as the appropriate choice of the numerical grid. While chapter 2 includes a short introduction of functionality and operating modes of internal combustion engines, the basics of kinetic reactions are presented in chapter 3. In chapter 4 the physical and chemical processes taking place in the combustion chamber are described. Ch- ter 5 is about phenomenological multi-zone models, and in chapter 6 the formation of poll- ants is described.
Technology & Engineering

Modelling Diesel Combustion

Author: P. A. Lakshminarayanan,Yoghesh V. Aghav

Publisher: Springer Science & Business Media

ISBN: 904813885X

Category: Technology & Engineering

Page: 305

View: 1001

Phenomenology of Diesel Combustion and Modeling Diesel is the most efficient combustion engine today and it plays an important role in transport of goods and passengers on land and on high seas. The emissions must be controlled as stipulated by the society without sacrificing the legendary fuel economy of the diesel engines. These important drivers caused innovations in diesel engineering like re-entrant combustion chambers in the piston, lower swirl support and high pressure injection, in turn reducing the ignition delay and hence the nitric oxides. The limits on emissions are being continually reduced. The- fore, the required accuracy of the models to predict the emissions and efficiency of the engines is high. The phenomenological combustion models based on physical and chemical description of the processes in the engine are practical to describe diesel engine combustion and to carry out parametric studies. This is because the injection process, which can be relatively well predicted, has the dominant effect on mixture formation and subsequent course of combustion. The need for improving these models by incorporating new developments in engine designs is explained in Chapter 2. With “model based control programs” used in the Electronic Control Units of the engines, phenomenological models are assuming more importance now because the detailed CFD based models are too slow to be handled by the Electronic Control Units. Experimental work is necessary to develop the basic understanding of the pr- esses.
Technology & Engineering

Proceedings of the 2nd Conference on Engine Processes

July 2–3, 2015, Berlin, Germany

Author: Sens, Marc,Baar, Roland

Publisher: Universitätsverlag der TU Berlin

ISBN: 3798327688

Category: Technology & Engineering

Page: 386

View: 3871

As the combustion engine looks set to remain the dominant energy conversion unit in vehicle powertrains in the medium term, either in combination with electrical components or on its own, attention will need to be paid to continue improving its efficiency in the future. The high development depth of today's combustion engines means that it is becoming increasingly difficult to achieve significant efficiency improvements by simple means. On the search for these improvements, the focus has shifted to inner-engine processes, for instance charge cycles including the charging system, the mixture formation including injection, combustion and kinematic conversion of the energy within the fuel. Our 2nd conference 'Engine processes' aims to offer all developers a platform to discuss the latest technological developments in the field of inner-engine process control, and encourage new paths to be taken. We believe that the program for this conference is a sound foundation for this endeavour. Da der Verbrennungsmotor auch mittelfristig die dominierende Energiewandlungseinheit im Antriebsstrang von Kraftfahrzeugen sein wird, entweder im Verbund mit elektrischen Komponenten oder aber als alleiniger Antrieb, muss der Verbesserung von dessen Wirkungsgrad auch in Zukunft erhebliche Aufmerksamkeit zu Teil werden. Aufgrund der hohen Entwicklungstiefe, die heutige Verbrennungsmotoren aufweisen, wird es immer schwerer, deutliche Wirkungsgradverbesserungen auf einfachem Weg zu erreichen. Auf der Suche nach diesen Verbesserungen rücken die innermotorischen Prozesse immer mehr in den Fokus, hierzu zählen der Ladungswechsel inkl. Aufladesystem, die Gemischbildung inkl. Einspritzung, die Verbrennung sowie die kinematische Wandlung der im Kraftstoff gebundenen Energie. Unsere 2. Tagung „Motorische Prozesse“ soll nun allen Entwicklern als Austauschforum zu neuesten technologischen Entwicklungen auf dem Gebiet der innermotorischen Prozessführung dienen und dazu anregen neue Wege zu beschreiten. Wir sind überzeugt, mit dem vorliegenden Tagungs-Programm hierzu einen sehr guten Beitrag leisten zu können.
Technology & Engineering

Internal Combustion Engine Fundamentals 2E

Author: John Heywood

Publisher: McGraw Hill Professional

ISBN: 1260116115

Category: Technology & Engineering

Page: 1056

View: 2236

The long-awaited revision of the most respected resource on Internal Combustion Engines --covering the basics through advanced operation of spark-ignition and diesel engines. Written by one of the most recognized and highly regarded names in internal combustion engines this trusted educational resource and professional reference covers the key physical and chemical processes that govern internal combustion engine operation and design. Internal Combustion Engine Fundamentals, Second Edition, has been thoroughly revised to cover recent advances, including performance enhancement, efficiency improvements, and emission reduction technologies. Highly illustrated and cross referenced, the book includes discussions of these engines’ environmental impacts and requirements. You will get complete explanations of spark-ignition and compression-ignition (diesel) engine operating characteristics as well as of engine flow and combustion phenomena and fuel requirements. Coverage includes:•Engine types and their operation•Engine design and operating parameters•Thermochemistry of fuel-air mixtures•Properties of working fluids•Ideal models of engine cycles•Gas exchange processes•Mixture preparation in spark-ignition engines•Charge motion within the cylinder•Combustion in spark-ignition engines•Combustion in compression-ignition engines•Pollutant formation and control•Engine heat transfer•Engine friction and lubrication•Modeling real engine flow and combustion processes•Engine operating characteristics
Technology & Engineering

Diesel engine combustion

Author: Institution of Mechanical Engineers (Great Britain). Combustion Engines Group

Publisher: N.A

ISBN: N.A

Category: Technology & Engineering

Page: 306

View: 7348

Fluid mechanics

JSME International Journal

Fluids engineering, heat transfer, power, combustion, thermophysical properties

Author: N.A

Publisher: N.A

ISBN: N.A

Category: Fluid mechanics

Page: N.A

View: 2980

Technology & Engineering

Flow and Combustion in Advanced Gas Turbine Combustors

Author: Johannes Janicka,AMSINI SADIKI,Michael Schäfer,Christof Heeger

Publisher: Springer Science & Business Media

ISBN: 9400753209

Category: Technology & Engineering

Page: 492

View: 5456

With regard to both the environmental sustainability and operating efficiency demands, modern combustion research has to face two main objectives, the optimization of combustion efficiency and the reduction of pollutants. This book reports on the combustion research activities carried out within the Collaborative Research Center (SFB) 568 “Flow and Combustion in Future Gas Turbine Combustion Chambers” funded by the German Research Foundation (DFG). This aimed at designing a completely integrated modeling and numerical simulation of the occurring very complex, coupled and interacting physico-chemical processes, such as turbulent heat and mass transport, single or multi-phase flows phenomena, chemical reactions/combustion and radiation, able to support the development of advanced gas turbine chamber concepts
Technology & Engineering

Introduction to Modeling and Control of Internal Combustion Engine Systems

Author: L. Guzzella,Christopher H. Onder

Publisher: Springer Science & Business Media

ISBN: 9783540222743

Category: Technology & Engineering

Page: 300

View: 1260

Internal combustion engines still have a potential for substantial improvements, particularly with regard to fuel efficiency and environmental compatibility. These goals can be achieved with help of control systems. Modeling and Control of Internal Combustion Engines (ICE) addresses these issues by offering an introduction to cost-effective model-based control system design for ICE. The primary emphasis is put on the ICE and its auxiliary devices. Mathematical models for these processes are developed in the text and selected feedforward and feedback control problems are discussed. The appendix contains a summary of the most important controller analysis and design methods, and a case study that analyzes a simplified idle-speed control problem. The book is written for students interested in the design of classical and novel ICE control systems.