Download or read book Control of Hybrid Hydromechanical Transmissions written by L. Viktor Larsson and published by . This book was released on 2019 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control Aspects of Complex Hydromechanical Transmissions written by L. Viktor Larsson and published by Linköping University Electronic Press. This book was released on 2017-08-17 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis deals with control aspects of complex hydromechanical transmissions. The overall purpose is to increase the knowledge of important aspects to consider during the development of hydromechanical transmissions to ensure transmission functionality. These include ways of evaluating control strategies in early design stages as well as dynamic properties and control aspects of displacement controllers, which are key components in these systems. Fuel prices and environmental concerns are factors that drive research on propulsion in heavy construction machinery. Hydromechanical transmissions are strong competitors to conventional torque-converter transmissions used in this application today. They offer high efficiency and wide speed/torque conversion ranges, and may easily be converted to hybrids that allow further fuel savings through energy recuperation. One challenge with hydromechanical transmissions is that they offer many different configurations, which in turn makes it important to enable evaluation of control aspects in early design stages. In this thesis, hardware-in-the-loop simulations, which blend hardware tests and standard software-based simulations, are considered to be a suitable method. A multiple-mode transmission applied to a mid-sized construction machine is modelled and evaluated in offline simulations as well as in hardware-in-the-loopsimulations. Hydromechanical transmissions rely on efficient variable pumps/motors with fast, accurate displacement controllers. This thesis studies the dynamic behaviour of the displacement controller in swash-plate axial-piston pumps/motors. A novel control approach in which the displacement is measured with an external sensor is proposed. Performance and limitations of the approach are tested in simulations and in experiments. The experiments showed a significantly improved performance with a controller that is slightly more advanced than a standard proportional controller. The implementation of the controller allows simple tuning and good predictability of the displacement response.

Download or read book Hardware in the loop Simulation of Hybrid Hydromechanical Transmissions written by Viktor Larsson and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Analysis and Control System Design of Automatic Transmissions written by Joel M Maguire and published by SAE International. This book was released on 2013-02-12 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: While the basic working principle and the mechanical construction of automatic transmissions has not changed significantly, increased requirements for performance, fuel economy, and drivability, as well as the increasing number of gears has made it more challenging to design the systems that control modern automatic transmissions. New types of transmissions—continuously variable transmissions (CVT), dual clutch transmissions (DCT), and hybrid powertrains—have presented added challenges. Gear shifting in today’s automatic transmissions is a dynamic process that involves synchronized torque transfer from one clutch to another, smooth engine speed change, engine torque management, and minimization of output torque disturbance. Dynamic analysis helps to understand gear shifting mechanics and supports creation of the best design for gear shift control systems in passenger cars, trucks, buses, and commercial vehicles. Based on the authors’ graduate-level teaching material, this well-illustrated book relays how the fundamental principles of hydraulics and control systems are applied to today’s automatic transmissions. It opens with coverage of basic automatic transmission mechanics and then details dynamics and controls associated with modern automatic transmissions. Topics covered include: gear shifting mechanics and controls, dynamic models of planetary automatic transmissions, design of hydraulic control systems, learning algorithms for achieving consistent shift quality, torque converter clutch controls, centrifugal pendulum vibration absorbers, friction launch controls, shift scheduling and integrated powertrain controls, continuously variable transmission ratio controls, dual-clutch transmission controls, and more. The book includes many equations and clearly explained examples. Sample Simulink models of various transmission mechanical, hydraulic and control subsystems are also provided. Chapter Two, which covers planetary gear automatic transmissions, includes homework questions, making it ideal for classroom use. In addition to students, new engineers will find the book helpful because it provides the basics of transmission dynamics and control. More experienced engineers will appreciate the theoretical discussions that will help elevate the reader’s knowledge. Although many automatic transmission-related books have been published, most focus on mechanical construction, operation principles, and control hardware. None tie the dynamic analysis, control system design, and analytic investigation of the mechanical, hydraulic, and electronic controls as does this book.

Download or read book Electronic Transmission Controls written by Ronald K Jurgen and published by SAE International. This book was released on 2000-06-10 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of the automotive transmission has changed rapidly in the last decade, partly due to the advantages of highly sophisticated electronic controls. This evolution has resulted in modern automatic transmissions that offer more control, stability, and convenience to the driver. Electronic Transmission Controls contains 68 technical papers from SAE and other international organizations written since 1995 on this rapidly growing area of automotive electronics. This book breaks down the topic into two sections. The section on Stepped Transmissions covers recent developments in regular and 4-wheel drive transmissions from major auto manufacturers including DaimlerChrysler, General Motors, Toyota, Honda, and Ford. Technology covered in this section includes: smooth shift control; automatic transmission efficiency; mechatronic systems; fuel saving technologies; shift control using information from vehicle navigation systems; and fuzzy logic control. The section on Continuously Variable Transmissions presents papers that demonstrate that CVTs offer better efficiency than conventional transmissions. Technologies covered in this section include: powertrain control; fuel consumption improvement; development of a 2-way clutch system; internal combustion engines with CVTs in passenger cars; control and shift strategies; and CVT application to hybrid powertrains. The book concludes with a chapter on the future of electronic transmissions in automobiles.

Download or read book Automotive Power Transmission Systems written by Yi Zhang and published by John Wiley & Sons. This book was released on 2018-10-08 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides technical details and developments for all automotive power transmission systems The transmission system of an automotive vehicle is the key to the dynamic performance, drivability and comfort, and fuel economy. Modern advanced transmission systems are the combination of mechanical, electrical and electronic subsystems. The development of transmission products requires the synergy of multi-disciplinary expertise in mechanical engineering, electrical engineering, and electronic and software engineering. Automotive Power Transmission Systems comprehensively covers various types of power transmission systems of ground vehicles, including conventional automobiles driven by internal combustion engines, and electric and hybrid vehicles. The book covers the technical aspects of design, analysis and control for manual transmissions, automatic transmission, CVTs, dual clutch transmissions, electric drives, and hybrid power systems. It not only presents the technical details of key transmission components, but also covers the system integration for dynamic analysis and control. Key features: Covers conventional automobiles as well as electric and hybrid vehicles. Covers aspects of design, analysis and control. Includes the most recent developments in the field of automotive power transmission systems. The book is essential reading for researchers and practitioners in automotive, mechanical and electrical engineering.

Download or read book Designing and Modeling a Split Torque Hydrostatic Transmission in Series with a Manual Transmission for an Automotive Application written by Taha Saad Al-Ghrairi and published by . This book was released on 2012 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing petroleum prices have developed a strong demand for an invention to reduce fuel consumption, as well as cut the produced amount of carbon dioxide via consumed fuel. Hybrid vehicles are an effective invention in terms of the hybrid research area because they can accomplish a low fuel consumption rate, thus dropping the carbon dioxide volume that is produced correspondingly. The main goal of this research is to design and model a hydraulic hybrid transmission that has a controlled pressure displacement pump and a controlled displacement motor. The design will show reasonable safety factor numbers in the worst conditions of operation. In addition, modeling was done for the entire drive train including 16 equations that signify the mechanical path and the hydraulic path, which represent the Hydraulic Hybrid Transmission (HHT). HHT consists of a manual gear box that is mounted in series with a split torque device. The output from the power split device delivers power to the two power paths then combines again via a downstream spur gear. A Proportional-Integral control was designed to make the engine work near a wide open throttle line (WOT), which is the most efficient way for an engine to produce power.

Download or read book Automotive Transmissions written by Harald Naunheimer and published by Springer Science & Business Media. This book was released on 2010-11-09 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a full account of the development process for automotive transmissions. Main topics: - Overview of the traffic – vehicle – transmission system - Mediating the power flow in vehicles - Selecting the ratios - Vehicle transmission systems - basic design principles - Typical designs of vehicle transmissions - Layout and design of important components, e.g. gearshifting mechanisms, moving-off elements, pumps, retarders - Transmission control units - Product development process, Manufacturing technology of vehicle transmissions, Reliability and testing The book covers manual, automated manual and automatic transmissions as well as continuously variable transmissions and hybrid drives for passenger cars and commercial vehicles. Furthermore, final drives, power take-offs and transfer gearboxes for 4-WD-vehicles are considered. Since the release of the first edition in 1999 there have been a lot of changes in the field of vehicles and transmissions. About 40% of the second edition’s content is new or revised with new data.

Download or read book Advanced Hybrid Powertrains for Commercial Vehicles written by Haoran Hu and published by SAE International. This book was released on 2021-04-14 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Powertrains for commercial vehicles have evolved since the late nineteenth-century invention of the ICE. In the revised second edition of Advanced Hybrid Powertrains for Commercial Vehicles, the authors explore commercial powertrains through history from the ICE through the introduction of the hybrid powertrain in commercial vehicles. Readers are given an understanding of the ICE as well as the classification of commercial vehicle hybrid powertrains, the variety of energy storage systems, fuel-cell hybrid powertrain systems, and commercial vehicle electrification. The authors review the legislation of vehicle emissions and the regulation necessary to promote the production of fuel-efficient vehicles.

Download or read book The Automotive Transmission Book written by Robert Fischer and published by Springer. This book was released on 2015-05-11 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents essential information on systems and interactions in automotive transmission technology and outlines the methodologies used to analyze and develop transmission concepts and designs. Functions of and interactions between components and subassemblies of transmissions are introduced, providing a basis for designing transmission systems and for determining their potentials and properties in vehicle-specific applications: passenger cars, trucks, buses, tractors and motorcycles. With these fundamentals the presentation provides universal resources for both state-of-the-art and future transmission technologies, including systems for electric and hybrid electric vehicles.

Download or read book The Design and Testing of a Hybrid Electric Powertrain Using a Continuously Variable Transmission with a Servo Hydraulic Control System written by Richard Wayne Carlson and published by . This book was released on 2000 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrostatic and Hydrodynamic Transmissions written by C. M. Edghill and published by . This book was released on 1977 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Control of Automotive Propulsion Systems written by Zongxuan Sun and published by CRC Press. This book was released on 2014-12-20 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Better Understand the Relationship between Powertrain System Design and Its Control IntegrationWhile powertrain system design and its control integration are traditionally divided into two different functional groups, a growing trend introduces the integration of more electronics (sensors, actuators, and controls) into the powertrain system.

Download or read book Simulation Based Optimization of a Series Hydraulic Hybrid Vehicle written by Katharina Baer and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid transmissions are characterized by their utilization of more than one form of energy storage. They have the potential to help reduce overall fuel consumption and vehicle emissions by providing the possibility of brake energy recuperation and prime mover operation management. Electric hybrids and electric vehicle drives are nowadays ubiquitous, and mechanical energy storage in flywheel has been investigated in the past. The use of fluid power technology with a combustion engine has also been investigated since the late 1970s, and is frequently revisited. Hydraulic hybridization is especially attractive for heavy vehicles with frequent braking and acceleration which benefit most from fluid power components’ high power density, typically busses, delivery or refuse vehicles, and vehicles with existing hydraulic circuits and transmissions, such as forest and construction machinery, but have been considered for smaller vehicles as well. Due to the characteristic discharge profile of hydraulic energy storage, special attention needs to be paid to control aspects in the design process to guarantee drivability of the vehicle. In this respect, simulation models can be of use in early design process stages for cheaper and faster evaluation of concepts and designs than physical experiments and prototyping, and to generate better understanding of the system studied. Engineering optimization aids in the systematic exploration of a given design space, to determine limits and potentials, evaluate trade-offs and potentially find unexpected solutions. In the optimization of a hydraulic hybrid transmission, the integration of component and controller design is of importance, and different strategies (sequential, iterative, bi-level and simultaneous approaches) are conceivable, with varying consequences for the implementation. This thesis establishes a simulation-based optimization framework for a hydraulic hybrid transmission with series architecture. Component and control parameter optimization are addressed simultaneously, using a rule-based supervisory control strategy. The forward-facing dynamic simulation model at the centre of the framework is built in Hopsan, a multi-disciplinary open-source tool developed at Linköping University. The optimization is set up and conducted for an example application of an on-road light-duty truck over standard drive cycles. Both results from these experiments as well as the framework itself are studied and evaluated. Relevant design aspects, such as explicit design relations to be considered and performance requirements for more robust design, are identified and addressed, and the optimization problem is analysed with regard to algorithm performance and problem formulation. The final result is an optimization framework that can be adjusted for further in-depth studies, for example through the inclusion of additional components or optimization objectives, and extendable for comparative analysis of different topologies, applications and problem formulations.

Download or read book Hydraulic Control Systems written by Noah Manring and published by John Wiley & Sons. This book was released on 2005-04-15 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique resource that demystifies the physical basics of hydraulic systems Hydraulic Control Systems offers students and professionals a reliable, complete volume of the most up-to-date hows and whys of today's hydraulic control system fundamentals. Complete with insightful industry examples, it features the latest coverage of modeling and control systems with a widely accepted approach to systems design. Hydraulic Control Systems is a powerful tool for developing a solid understanding of hydraulic control systems that will serve the practicing engineer in the field. Throughout the book, illustrative case studies highlight important topics and demonstrate how equations can be implemented and used in the real world. Featuring exercise problems at the end of every chapter, Hydraulic Control Systems presents: A useful review of fluid mechanics and system dynamics Thorough analysis of transient fluid flow forces within valves Discussions of flow ripple for both gear pumps and axial piston pumps Updated analysis of the pump control problems associated with swash plate type machines A successful methodology for hydraulic system design—starting from the load point of the system and working backward to the ultimate power source Reduced-order models and PID controllers showing control objectives of position, velocity, and effort

Download or read book Hydrostatic Transmissions and Actuators written by Gustavo Costa and published by John Wiley & Sons. This book was released on 2015-09-28 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrostatic Transmissions and Actuators takes a pedagogical approach and begins with an overview of the subject, providing basic definitions and introducing fundamental concepts. Hydrostatic transmissions and hydrostatic actuators are then examined in more detail with coverage of pumps and motors, hydrostatic solutions to single-rod actuators, energy management and efficiency and dynamic response. Consideration is also given to current and emerging applications of hydrostatic transmissions and actuators in automobiles, mobile equipment, wind turbines, wave energy harvesting and airplanes. End of chapter exercises and real world industrial examples are included throughout and a companion website hosting a solution manual is also available. Hydrostatic Transmissions and Actuators is an up to date and comprehensive textbook suitable for courses on fluid power systems and technology, and mechatronics systems design.

Download or read book Power Transmission and Motion Control PTMC 2004 written by Clifford R. Burrows and published by John Wiley & Sons. This book was released on 2007-07-16 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power Transmission and Motion Control 2004 (PTMC) comprises papers by authors from twelve countries. Presented at PTMC 2004- one of a series of annual Workshops held at the Bath University- this collection of well illustrated papers reports on latest developments from key international research centres in the fields of hydraulic and pneumatic motion control. Topics include: Drives, transmissions, and actuators Hydraulic and pneumatic components and systems Modelling and simulation Control Hydraulic fluids Condition monitoring Noise and Vibration Actuation systems Hydraulic system design Measurement techniques Essential reading for researchers and practitioners working in the fields of power transmission, motion control, hydraulics, and pneumatics.