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Oxygen Storage Dominated Three Way Catalyst Modeling
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Book Synopsis Oxygen storage dominated three-way catalyst modeling by : Jeremias Bickel
Download or read book Oxygen storage dominated three-way catalyst modeling written by Jeremias Bickel and published by Logos Verlag Berlin GmbH. This book was released on 2022-01-20 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The key to achieve optimal emission performance of a modern three-way catalyst (TWC) under transient engine operating conditions is to maintain an optimal oxidation state of the oxygen storage material inside the washcoat of the catalyst. This work demonstrates how simplified kinetic models can be developed that allow for accurately predicting the oxygen storage level under dynamic operation.
Book Synopsis Frontier Computing by : Jason C. Hung
Download or read book Frontier Computing written by Jason C. Hung and published by Springer. This book was released on 2019-05-18 with total page 2003 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the 6th International Conference on Frontier Computing, held in Kuala Lumpur, Malaysia on July 3–6, 2018, and provides comprehensive coverage of the latest advances and trends in information technology, science and engineering. It addresses a number of broad themes, including communication networks, business intelligence and knowledge management, web intelligence, and related fields that inspire the development of information technology. The contributions cover a wide range of topics: database and data mining, networking and communications, web and internet of things, embedded systems, soft computing, social network analysis, security and privacy, optical communication, and ubiquitous/pervasive computing. Many of the papers outline promising future research directions. The book is a valuable resource for students, researchers and professionals, and also offers a useful reference guide for newcomers to the field.
Book Synopsis Nonlinear Control Under Nonconstant Delays by : Nikolaos Bekiaris-Liberis
Download or read book Nonlinear Control Under Nonconstant Delays written by Nikolaos Bekiaris-Liberis and published by SIAM. This book was released on 2013-09-25 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have developed a methodology for control of nonlinear systems in the presence of long delays, with large and rapid variation in the actuation or sensing path, or in the presence of long delays affecting the internal state of a system. In addition to control synthesis, they introduce tools to quantify the performance and the robustness properties of the designs provided in the book. The book is based on the concept of predictor feedback and infinite-dimensional backstepping transformation for linear systems and the authors guide the reader from the basic ideas of the concept?with constant delays only on the input?all the way through to nonlinear systems with state-dependent delays on the input as well as on system states. Readers will find the book useful because the authors provide elegant and systematic treatments of long-standing problems in delay systems, such as systems with state-dependent delays that arise in many applications. In addition, the authors give all control designs by explicit formulae, making the book especially useful for engineers who have faced delay-related challenges and are concerned with actual implementations and they accompany all control designs with Lyapunov-based analysis for establishing stability and performance guarantees.
Download or read book Emissions Technologies written by and published by . This book was released on 2004 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Global Reaction Mechanism for Transient Simulations of Three-Way Catalytic Converters by : Raoul Holder
Download or read book A Global Reaction Mechanism for Transient Simulations of Three-Way Catalytic Converters written by Raoul Holder and published by Cuvillier Verlag. This book was released on 2008-09-04 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The complex interactions between chemical kinetics and transport phenomena of mass, momentum and energy lead to incomplete fuel combustion, which is the origin of pollutant formation of internal combustion engines. Vehicle exhaust gas emission control devices have continuously been improved to meet the constantly tightened standards. Three-way catalyst technology is extensively used for the purification of automotive exhaust gases, usually in combination with monolithic (honeycomb) reactors. A promising alternative to the time consuming and costly engine and vehicle experiments are catalytic reactor model. In this work a global reaction mechanism for three-way catalysts is developed including 16 reactions and 12 gas phase species. The reaction mechanism is combined with an empirical oxygen storage model and validated against a number of different real engine experiments carried out on both fresh (not aged) and aged catalysts. Once the mechanism is validated against the fresh system, the adaption to the aged system is achieved solely by the reduction of the available reactive surface area of the washcoat, without tuning the individual reaction parameters. Finally the parameter set of the aged system is used to simulate a FTP75 drive cycle and the results are compared to experimental data of the same catalyst without further tuning. First a transient one-dimensional catalyst model is derived in chapter 2. First a short introduction to the structure of monolithic reactors is given, followed by the introduction of the governing equations for catalytically reacting flows. Chapter 3 focuses on the relevant transport processes inside the monolithic reactor channel and the adequacy of the transport models applied here. Local distributions of Nusselt and Sherwood numbers inside a monolith channel are resolved using a two-dimensional model. The cases of non-reacting and reacting conditions at the channel wall are discussed and subsequently compared to according a priori correlations. The subject of chapter 4 is the development and validation of the reaction mechanism. An advanced multi-objective optimization algorithm is used to calibrate the kinetic parameters of the presented reaction mechanism (comprising 16 reactions) to match the conversion behavior of a fresh catalyst. The simulation results are compared with experimental data at different operating conditions. In a second step the kinetic model is then used to simulate the conversion behavior of an aged catalyst. The adaption of the kinetic model is achieved only by the reduction of the available surface area. Again the computed conversion characteristics are compared to measured data. Finally an empirical oxygen storage model is included. In chapter 5 the catalyst model for the aged system is used to predict the tailpipe emissions during real drive cycle conditions. Finally a catalyst design parameter study is presented as a typical application of the model within the development process of exhaust gas aftertreatment systems.
Book Synopsis Technical Literature Abstracts by : Society of Automotive Engineers
Download or read book Technical Literature Abstracts written by Society of Automotive Engineers and published by . This book was released on 2000 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Automotive Control 2004 (2-volume Set) by : G Rizzo
Download or read book Advances in Automotive Control 2004 (2-volume Set) written by G Rizzo and published by Elsevier. This book was released on 2005-11-07 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Index/abstracts of SAE Technical Papers by :
Download or read book Annual Index/abstracts of SAE Technical Papers written by and published by . This book was released on 2007 with total page 1218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intelligent Components for Autonomous and Semi-Autonomous Vehicles by : P. Bidan
Download or read book Intelligent Components for Autonomous and Semi-Autonomous Vehicles written by P. Bidan and published by Pergamon. This book was released on 1996-09-11 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IFAC Workshop on Intelligent Components for Autonomous and Semi-Autonomous Vehicles (ICASAV '95) was held in Toulouse, France, 25-26 October 1995 and provided academic and industrial researchers from all over the world with an opportunity to discuss their experiences and research results in this field. Areas covered included vehicle dynamics, navigation, localization estimation, driver assistance and energy management.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis Modelling and Control of Three-way Catalytic Converters by : Theophil Sebastian Auckenthaler
Download or read book Modelling and Control of Three-way Catalytic Converters written by Theophil Sebastian Auckenthaler and published by . This book was released on 2005 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to Modeling and Control of Internal Combustion Engine Systems by : Lino Guzzella
Download or read book Introduction to Modeling and Control of Internal Combustion Engine Systems written by Lino Guzzella and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Model Based Control Design and Rapid Calibration for Air to Fuel Ratio Control of Stoichiometric Engines by : Sai S. V. Rajagopalan
Download or read book Model Based Control Design and Rapid Calibration for Air to Fuel Ratio Control of Stoichiometric Engines written by Sai S. V. Rajagopalan and published by . This book was released on 2008 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The air-fuel ratio control problem has been the focus of research in academia ever since the advent of microprocessor based control of automotive systems. With rising fuel costs, increased environmental consciousness, and the need to be competitive in the global market, automotive manufacturers, who have traditionally relied on extensive experimental calibration to fine tune performance, are moving towardsmodel based calibration of control gains to minimize costs and incorporate advances in power-train technology in a systematic manner. While solutions presented in the open literature to date illustrate the application of the plethora of modern control theory to this problem, calibration effort and emissions performance have not been given adequate priority. The work presented in this document bridges a gap between academia and industry by using modern advances in control theory to design a solution that significantly minimizes the calibration effort required to meet performance requirements. Through proper design of experiments, data collected from the plant is used to design mathematical models that represent the dominant dynamics observed in the intake system, the fueling, combustion and gas transport and finally the behavior of the three way catalyst. The structure of these models are chosen by a deep understanding of the physics involved. System identification is used to simplify the model structure. To capture the highly nonlinear operating condition based behavior of the plant, a linear parameter varying approach is used to schedule the model coefficients through the use of linear splines on manifold pressure, engine speed and coolant temperature. The control architecture chosen utilizes a servomechanism incorporating coordinated open and closed loop control action to meet the desired performance goal and is universal in the sense that both switching sensor and linear sensor based systems can be easily accommodated with minimal change. A rapid action inner-loop, with the pre-catalyst oxygen sensor feedback to control the engine exhaust, is used in conjunction with an outer loop with post catalyst oxygen sensor feedback, to control the oxygen storage in the catalyst. Calibration of the control gains is achieved through closed loop optimization using genetic algorithms. Parallel computing is used for this optimization. Performance and stability criteria are simultaneously incorporated in the cost function to achieve the desired goals. Numerical linear matrix inequality based tests are used to guarantee stability of the closed loop system over the entire operating region. Although the discussion in this dissertation is restricted to calibration of the inner-loop compensator, one can easily adopt the proposed techniques for the design of the outer-loop compensator, as well as for a wide variety of feedback control systems.
Book Synopsis Journal of Dynamic Systems, Measurement, and Control by :
Download or read book Journal of Dynamic Systems, Measurement, and Control written by and published by . This book was released on 2001 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publishes theoretical and applied original papers in dynamic systems. Theoretical papers present new theoretical developments and knowledge for controls of dynamical systems together with clear engineering motivation for the new theory. Applied papers include modeling, simulation, and corroboration of theory with emphasis on demonstrated practicality.
Book Synopsis NOx Trap Catalysts and Technologies by : Luca Lietti
Download or read book NOx Trap Catalysts and Technologies written by Luca Lietti and published by Royal Society of Chemistry. This book was released on 2018-06-13 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vehicle exhaust emissions, particularly from diesel cars, are considered to be a significant problem for the environment and human health. Lean NOx Trap (LNT) or NOx Storage/Reduction (NSR) technology is one of the current techniques used in the abatement of NOx from lean exhausts. Researchers are constantly searching for new inexpensive catalysts with high efficiency at low temperatures and negligible fuel penalties, to meet the challenges of this field. This book will be the first to comprehensively present the current research on this important area. Covering the technology used, from its development in the early 1990s up to the current state-of-the-art technologies and new legislation. Beginning with the fundamental aspects of the process, the discussion will cover the real application standard through to the detailed modelling of full scale catalysts. Scientists, academic and industrial researchers, engineers working in the automotive sector and technicians working on emission control will find this book an invaluable resource.
Book Synopsis Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards by :
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2008 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
