Motorer og kraftoverføring

Corina Slocinski identifiziert vorliegend Möglichkeiten zur Beeinflussung der Eigenschaften von Dieselkraftstoffstrahlen und bewertet deren Wirkung in der Gemischaufbereitung. Anhand hydraulischer, mechanischer und optischer Analysen sowie der Bewertung mittels eines Einzylindermotors leitet die Autorin für die Strahlformung infolge der elektrischen Einspritzstrategie ein bedeutendes Potenzial für die Brennverfahrensoptimierung ab. Neben der Definition von Standards zur Erhöhung der Aussagekraft und Vergleichbarkeit der Ergebnisse entwickelt und etabliert sie neue Methodiken zur optischen Analyse von Einspritzstrahlen.Der Inhalt Aufbau der verwendeten MesssystemeErhöhung der Analysequalität und der Vergleichbarkeit mit den vorgestellten MesstechnikenWeiterentwicklung der optischen AnalysemethodikAnalyse der Einflussmöglichkeiten auf die EinspritzstrahlcharakteristikDie Zielgruppen Dozierende und Studierende der Fachgebiete Verbrennungsmotoren und EinspritzdiagnostikIngenieure des Fachgebietes Durchführung von Einspritzanalysen bei OEMs und ZulieferernDie AutorinCorina Slocinski hat am Institut für Fahrzeugtechnik Stuttgart (IFS) der Universität Stuttgart im Bereich Fahrzeugantriebe promoviert und arbeitet zurzeit bei einem Automobilkonzern als Führungskraft in der Antriebsentwicklung.

The book collects selected papers presented at the 7th International Conference on Aerospace System Science and Engineering (ICASSE 2023), organized by Shanghai Jiao Tong University, China on July 6¿7, 2023. It provides a forum for experts in aeronautics and astronautics to share new ideas and findings. ICASSE conference has been organized annually since 2017 and host in Shanghai, Moscow, and Toronto in turn, where the three regional editors of journal Aerospace Systems are located. This book presents high-quality contributions in the subject area of Aerospace System Science and Engineering, including topics such as trans-space vehicle systems design and integration, air vehicle systems, space vehicle systems, near-space vehicle systems, opto-electronic system, aerospace robotics and unmanned system, aerospace robotics and unmanned system, communication, navigation and surveillance, dynamics and control, intelligent sensing and Information fusion, aerodynamics and aircraft design, aerospace propulsion, avionics system, air traffic management, earth observation, deep space exploration, bionic micro-aircraft/spacecraft.

This book provides findings on the simulation of the valve dynamic to the current technological standards. Above all, it delivers a simulation based and predictive approach on the fatigue strength assessment of four-stroke heavy-duty engine valves. The demand for more efficient combustion engines with fuel flexibility goes along with increasing component requirements regarding strength and durability, while the development costs should remain low. In this context, the present book focuses on the gas exchange valves of heavy-duty engines. Especially, the valves on the exhaust side have an increased risk of fatigue failure. The aim of this book is the generation of a predictive fatigue strength assessment to strengthen the frontloading of the exhaust valve design process and to increase the reliability of the component. In the context of fatigue assessment, this book examines the loads of the exhaust valve during its working cycle. Beside the high temperature and cylinder pressure, further loads act on the exhaust valve like actuation force or an eccentric impact of the valve on the valve seat ring. Furthermore, a bold valve secondary dynamic in the form of valve bending vibrations is observed on the exhaust valves of heavy-duty engines increasing the valve load even more. The cause of this secondary dynamic is unknown. This book investigates the valve loads to get the necessary input for the fatigue strength assessment. With respect to a predictive approach, the determination of valve dynamic and valve loads is based on a multibody simulation model of the valve train. In order to deliver predictive results and a transferable method, this simulation model includes all relevant physical effects to describe the valve dynamic accurately during all valve load phases of the working cycle. With the simulation model, the root cause for the bold valve secondary dynamic is examined iteratively. The model delivers not only the cause for the valve secondary dynamic but most importantly the critical valve loads. These loads deliver the input for the fatigue strength assessment. To ensure the robustness of the load data determined by the simulation model, the sensitivity of influences on the valve load is examined. In this context geometrical misalignment, fluctuations in load data and variable engine operation points are considered. A load collective based on the variation of influences on the valve load is the result of this analysis. All the results of the influence and sensitivity study are generated with the newly developed simulation model of the valve train. Moreover, this book outlines measurements on a testbed engine. In scope of these measurements are temperature and strain measurements of the valve. The generated data validate the simulation model of the valve train. Additionally, the statistical evaluation of the data is used in the subsequent fatigue strength assessment to increase the reliability of the results.

This Handbook of Numerical Simulation of In-Flight Icing covers an array of methodologies and technologies on numerical simulation of in-flight icing and its applications. Comprised of contributions from internationally recognized experts from the Americas, Asia, and the EU, this authoritative, self-contained reference includes best practices and specification data spanning the gamut of simulation tools available internationally that can be used to speed up the certification of aircraft and make them safer to fly into known icing. The collection features nine sections concentrating on aircraft, rotorcraft, jet engines, UAVs; ice protection systems, including hot-air, electrothermal, and others; sensors and probes, CFD in the aid of testing, flight simulators, and certification process acceleration methods. Incorporating perspectives from academia, commercial, government R&D, the book is ideal for a range of engineers and scientists concerned with in-flight icing applications.

This book addresses the recent trends in high-temperature coatings that are used to provide oxidation and wear resistance to metallic/ceramic components in extreme environments. Ceramics, intermetallics, organosilicon polymers, cermets, and other materials with great thermal stability have long been recognized for these applications. This book introduces the state of the art in coating materials and processes for high-temperature environments and identifies areas for improvement in materials selection, performance upgrades, design considerations, and manufacturing methods. The book covers a variety of high-temperature coatings prepared through various synthesis processes such as thermal spraying, physical vapor deposition, electrodeposition, and sol¿gel methods. It covers corrosion/oxidation, phase stability, and thermal and mechanical behavior of high-temperature coating materials having greater thermal stability.With contributions from international researchers active in the field, this edited book features the most recent and up-to-date literature references for a broad readership consisting of academic and industrial professionals. It is suitable for graduate students as well as scientists and engineers working in the area of anti-corrosion and anti-wear resistant high-temperature coatings for industrial applications.

Für alle, die fasziniert vom Fliegen sind und ein tieferes Verständnis dafür entwickeln wollen, wie Vögel und Modellflugzeuge ihre Kreise in der Luft ziehen. Anschaulich und unterhaltsam führt der Autor in die komplexen Sachverhalte von Wirbel, Zirkulation und Auftrieb ein. Verständlich und begreifbar durch zahlreiche Diagramme und Videos. Es gelingt dem Autor die dem dynamischen Auftrieb zugrunde liegenden Gesetzmäßigkeiten besonders anschaulich darzustellen.

Sebastian K. Crönert presents a new, automated process that makes it possible to obtain all the fuel properties required for combustion simulation. If necessary, these are then transferred - also automatically - into specially created correlation equations through which they are then made available again at simulation runtime. This method makes it possible to represent even more complex correlations and cross-influences on calculation variables in a resource-optimised way (memory requirements and access time) while maintaining the same accuracy. The procedure is validated using test bench measurement data for the pure fuels anisole and cyclopentanone and their blends with regular petrol (RON95E10). Additional validations include more established synthetic fuels and hydrogen. It is shown that an extraordinarily high prediction quality can be achieved for the model class.

Wasserstoff in der Fahrzeugtechnik"e; bietet einen allgemeinen Uberblick uber die verschiedenen Aspekte von Eigenschaften, Erzeugung, Speicherung und Anwendung von Wasserstoff. Schwerpunkte liegen auf der Thermodynamik der Speicherung von Wasserstoff sowie auf der Anwendung in der Fahrzeugtechnik und in der Energietechnik. Mit Bezug zu Forschungsvorhaben an der TU Graz und dem HyCentA wird der aktuelle Stand der Technik fundiert dargestellt. Als eigener Abschnitt wurde in dieser Auflage die Brennstoffzelle zur Stromerzeugung fur Elektroantriebeergnzt. Ein Verfahren zur Wasserstoffproduktion durch Pyrolyse aus Glycerin wurde neu aufgenommen. Ergnzt wurden Abschnitte ber aktuelle Anwendungen, ber Verbrennungsmotoren fr Gemische aus Wasserstoff und Methan, ber Werkstoffe sowie Fragen von Wirkungsgrad und CO2-Emissionen.

Depuis la fin du 19ème siècle, de nombreux inventeurs ont utilisé l'eau comme additif dans les moteurs à combustion interne, dans le but d'en abaisser la consommation et d'en réduire la pollution. De nos jours, le plus connu d'entre eux est l'américain Paul Pantone.Cet ouvrage vous propose une approche approfondie et transversale du sujet à travers l'expérience des auteurs, qui ont industrialisé leur version originale de ces procédés sous la forme d'un réacteur catalytique miniaturisé prêt à l'emploi.Partie 1 : un historique des principaux moteurs et procédés utilisant de l'eau pour optimiser la combustion, avec en toile de fond le mythe du moteur à eau.Partie 2 : Le parcours des auteurs depuis les premiers prototypes jusqu'à la création en 2006 de la Sarl Hypnow, société qui cessera son activité en 2019.Partie 3 : Des données techniques précises permettant de comprendre et d'évaluer les critères de bon fonctionnement des moteurs diesel équipés d'un économiseur de carburant (incluant les plans du SPAD et une aide au diagnostic de pannes).Troisième édition 2023.

This book analyzes the problems to be solved urgently in the development of launch vehicle control system. The techniques of redundant Inertial Measurement Unit (IMU) reconfiguration and trajectory replanning are proposed aiming at the inertial device failures and power system failures during flight of launch vehicles, respectively. It introduces the background of redundant IMU reconfiguration and trajectory replanning technologies and models of launch vehicle dynamics and redundant strap-down IMUs. The approaches for redundant strap-down IMU fault detection, reconfiguration and trajectory replanning are proposed, putting forward a prospect for the development of launch vehicle control system. The content of this book is concise and highly pragmatic. It could serve as a reference for engineers and researchers engaged in the analysis, design and verification of launch vehicle control systems and also as a reference for graduate students and senior undergraduates majoring in navigation, guidance and control.

The book expounds the current research and development trend of intelligent safety technology of automobile, and analyzes and excavates the new safety technology to the automobile. It introduces the basic theory, core method, key technology, main system, test evaluation and innovation practice of intelligent safety of automobile for readers, providing a certain theoretical and practical basis for the safety development of the automobile.This book is elaborated from the perspective of the driver-vehicle-road system. The traffic accidents are divided into three stages for discussion: before, during and after the collision. This book constructs a new systematic structure for Safety theory and technical system of several key links, including system safety, operation safety, intelligent protection and safety evaluation. It will be a useful reference for researchers and practitioners in the field of automobile engineering and auto pilot.

This book provides a detailed description of hydrogen production through water electrolysis. It starts with the theoretical description of the chemical, thermodynamic, and kinetic issues related to the electrolysis of water. The main available technologies and the ones under development are detailed from a technical and a scientific point of view. At the end of the book Dr. Cavaliere describes the main hydrogen applications and their contribution to the grand energy transition that is expected by the middle of the century. The book also examines the economic issues related to the transition toward the hydrogen society.

This book presents the select proceedings of the 3rd National Aerospace Propulsion Conference (NAPC 2020). It discusses the recent trends in the area of aerospace propulsion technologies covering both air-breathing and non-air-breathing propulsion. The topics covered include state-of-the-art design, analysis and developmental testing of gas turbine engine modules and sub-systems like compressor, combustor, turbine and alternator; advances in spray injection and atomization; aspects of combustion pertinent to all types of propulsion systems and nuances of space, missile and alternative propulsion systems. The book will be a valuable reference for beginners, researchers and professionals interested in aerospace propulsion and allied fields.

This book was written by a team of leading gear experts from across the globe, including contributions from USA, Germany, Poland, China, Russia, Ukraine, and Belarus. It provides readers with the latest accomplishments in the gear theory and gear cutting tool design.  Specialists can apply competencies gained from this book to quality control in gear manufacture, as well as to the conditions of their production. The book begins with a detailed discussion of the kinematics and geometry of geometrically-accurate gears and gear systems.  This is followed by an analysis of state-of-the-art gear manufacturing methods with focus on gear finishing operations.  Novel designs of gear transmission systems as well as gear theory and gear cutting tool design are also covered. 

Marvin Sascha Wahl presents the possibilities for optimising diesel engine combustion. In the advanced process of partially premixed diesel combustion, nitrogen oxide and soot emissions can be minimised at the same time. A new feature is the possibility of applying this strategy up to 2000 revolutions and 10 bar indicated mean pressure. In this work, various effective parameters are also compared and correlated with each other. A final comparison with conventional diesel combustion shows the advantages and disadvantages and evaluates them.

This book deals with the simulative prediction of efficiency and CO2-emissions of future powertrain systems for the year 2040. For this purpose, a suitable simulation environment is first created. This is followed by a technology extrapolation of all relevant powertrain systems, for example: combustion engines, electric drives, fuel cells as well as all relevant additional components. These components are then used to build 57 vehicle variants for the simulation. Finally, extensive simulations of the vehicle variants are carried out, evaluated and compared. Comprehensive tables of results are available for all simulated vehicle variants. The evaluations are of interest to anyone concerned with energy consumption and CO2-emissions of future vehicles.

This book presents advanced theoretical and technological findings in electric and hybrid vehicle applications. It covers numerous emerging technologies in this field such as new electric machine topology, new control algorithms, new power converter designs, sophisticated energy managements, improved charging processes, new energy storage technologies and sources, wireless power transfer technologies. The book caters to not only researchers and educators in the field, but also other readers who are interested in new concepts in electric and hybrid vehicular technologies.

Das vorliegende Buch beschreibt die Entwicklungsgeschichte der Turbo-Luftstrahltriebwerke, hauptsächlich im Beziehungsdreieck Großbritannien (USA) ¿ Deutschland ¿ Schweiz von frühen Anfängen in den 1920er Jahren bis zu ersten zivilen Anwendungen in den späten 1950er Jahren, ehe der bis heute anhaltende Siegeszug des Welt-Luftverkehrs begann. Unerwartete Verbindungen werden hervorgehoben, insbesondere der beträchtliche Einfluss der Axialverdichter-Technologie des schweizerisch-deutschen Unternehmens BBC Brown Boveri & Cie. auf die beiden anderen Seiten.Der Autor deckt wichtige Beziehungen und Abhängigkeiten auf, die einen erheb-lichen technischen Austausch förderten, und daher zu einer Änderung der bisherigen technisch-historischen Betrachtungsweise führen müssen, insbesondere in den entscheidenden Jahren vor Beginn des Zweiten Weltkriegs. Damit werden bestehende Lücken in der bisher allzu einseitigen Sicht auf diesen technisch herausragenden Entwicklungsfortschritt geschlossen.Die überlieferte ¿Whittle vs. von Ohain Sagä wird nicht in Gänze wiederholt, aber insoweit angesprochen, wie es zum Verständnis des nunmehr erheblich erweiterten Geschichtsbilds erforderlich ist.

In this book, the reader learns the essential differences to the passenger car through the analysis divided according to assemblies. This gives him the tools to apply the detailed knowledge he has acquired to the design and development of competition vehicles. The chassis determines the driving behaviour and thus the "DNA" of a racing vehicle like no other assembly. Starting with the tyre - the decisive mechanical component - all the components of the wheel suspension including steering and braking system are presented and discussed. The focus is on the double wishbone and suspension strut axles. The design of wheel suspensions starts with kinematic considerations, leads via component design to considerations of the vehicle dynamics. Ultimately, the maximum forces of the tires in the transverse and circumferential directions are to be exploited while keeping the vehicle controllable. Due to the detailed, in-depth presentation, the work is just as suitable for the interested motorsport enthusiast as it is for the engineer in practice who is dealing with questions relating to racing suspensions. The formula material is prepared in such a way that the book can also be used as a reference work.

In this book, the reader learns the essential differences to the passenger car through the analysis divided according to assemblies. This gives him the tools to apply the detailed knowledge acquired to the design and development of competition vehicles. The course for a successful car is set in the concept phase. For this reason, it is given a lot of space and associated design-related areas such as the choice of materials, lightweight construction, design principles, reliability, etc. are discussed. When considering the vehicle as a whole, however, safety systems (rollover device, crash elements, restraining ropes), the cockpit (driver position, seat with restraint system, steering wheel, gearshift, pedal system), the frame or monocoque, the outer skin and aerodynamic devices (ventilation, aerodynamic drag, downforce) must not be omitted. The detailed, in-depth presentation makes the work just as suitable for the interested motorsport enthusiast as it is for the engineer witha practical interest in questions relating to the complete vehicle. The formula material is prepared in such a way that the book can also be used as a reference work. .

The focus of the book is on the driving dynamics of racing vehicles. The interaction of the tyre, the aerodynamics, of the chassis and the limited slip differential specific to racing vehicles is dealt with. A chapter on the basics of vehicle dynamics makes it possible to get started with this topic even without prior automotive engineering training. A historical review and a consideration of the essential safety aspects create an understanding of higher-level requirements, which are specified, for example, by the technical regulations.

This book tells the story of the power generation gas turbine from the perspective of one of the leading companies in the field over a period of nearly 100 years, written by an engineer. Especially in times of imminent global economic crises it appears to be worthwhile to reflect on real economic values based on engineering ingenuity and enduring management of technological leadership. Though the book is primarily designed as a technical history of the BBC/ABB/Alstom power generation gas turbines, its scope is sufficiently broad to cover general development trends, including parallel competitor activities. A special benefit is the historical breakdown to the gas turbine component level, so that the book actually outlines the development of axial compressors from early beginnings, the progress in combustion technology towards extraordinary low emission values and that of axial turbines with special emphasis on early turbine cooling innovations.The sheer length of certain engineering developments over several decades allows interesting historic observations and deductions on inherent business mechanisms, the effects of technology preparations and organisational consequences. A look into the mirror of the past provides revelations on the impact of far-reaching business decisions. 2017 Winner of the Historian Engineer Award of the ASME (American Society of Mechanical Engineers