The Evaluation And Analysis Of A Power Split Hydraulic Hybrid Drivetrain
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Author | : Mark E. Dirck |
Publisher | : |
Total Pages | : 180 |
Release | : 2003 |
Genre | : Hybrid electric vehicles |
ISBN | : |
Download The Evaluation and Analysis of a Power Split Hydraulic Hybrid Drivetrain Book in PDF, Epub and Kindle
Volatile petroleum costs accompanied by mounting pollution concerns have prompted much research into improved automobile technologies. From this research, electric vehicles, fuel cell vehicles, and hybrid vehicles have emerged as feasible solutions to reduce fuel consumption and pollution. Largely overlooked by this research are the potential benefits of a power split hydraulic hybrid vehicle. A design for a power split hydraulic hybrid vehicle is provided. A full mathematical model of each component of the drivetrain is also presented. Applying the mathematical model, the performance of the hybrid vehicle is simulated over the EPA Federal Highway Driving Schedule and the EPA New York Driving Schedule. The performance of a conventional vehicle is also simulated over these driving schedules and its results are compared to the hybrid vehicle. From the analysis, the hybrid vehicle yielded a 14.6% improvement in fuel economy over the highway cycle and a 37.4% improvement on the New York cycle. These improvements were due to the ability of the power split hydraulic drivetrain to allow the engine to operate at its most fuel efficient range.
Author | : Xiaohua Zeng |
Publisher | : Springer |
Total Pages | : 297 |
Release | : 2017-10-04 |
Genre | : Technology & Engineering |
ISBN | : 9811042721 |
Download Analysis and Design of the Power-Split Device for Hybrid Systems Book in PDF, Epub and Kindle
This book presents a comprehensive overview of power-split device (PSD) design. It discusses vehicle energy consumption characteristics, hybrid vehicle power request solutions, typical configurations, operating principle and simulation technology of PSD hybrid system, a multi-factor integrated parametric design method and a dynamic coordinated control method for PSD hybrid system. It also describes the finite element analysis, thermal analysis and optimization of the PSD based on a surrogate model, explains the theory behind the design and the simulation, and provides concrete examples. It is a valuable resource for researchers and the engineers to gain a better understanding of the PSD design process.
Author | : Serhan Ozdemir |
Publisher | : |
Total Pages | : 188 |
Release | : 1999 |
Genre | : |
ISBN | : |
Download Optimization and Analysis of a Hybrid Continuously Variable Power Split Transmission 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 | : Harold Bernard Samuels |
Publisher | : |
Total Pages | : 232 |
Release | : 2002 |
Genre | : |
ISBN | : |
Download Modeling and Analysis of a Multi-inertia Power Split Continuously Variable Transmission for Hybrid Vehicles Book in PDF, Epub and Kindle
Author | : L. Viktor Larsson |
Publisher | : Linköping University Electronic Press |
Total Pages | : 55 |
Release | : 2017-08-17 |
Genre | : |
ISBN | : 9176854833 |
Download Control Aspects of Complex Hydromechanical Transmissions Book in PDF, Epub and Kindle
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.
Author | : Simona Onori |
Publisher | : Springer |
Total Pages | : 121 |
Release | : 2015-12-16 |
Genre | : Technology & Engineering |
ISBN | : 1447167813 |
Download Hybrid Electric Vehicles Book in PDF, Epub and Kindle
This SpringerBrief deals with the control and optimization problem in hybrid electric vehicles. Given that there are two (or more) energy sources (i.e., battery and fuel) in hybrid vehicles, it shows the reader how to implement an energy-management strategy that decides how much of the vehicle’s power is provided by each source instant by instant. Hybrid Electric Vehicles: •introduces methods for modeling energy flow in hybrid electric vehicles; •presents a standard mathematical formulation of the optimal control problem; •discusses different optimization and control strategies for energy management, integrating the most recent research results; and •carries out an overall comparison of the different control strategies presented. Chapter by chapter, a case study is thoroughly developed, providing illustrative numerical examples that show the basic principles applied to real-world situations. The brief is intended as a straightforward tool for learning quickly about state-of-the-art energy-management strategies. It is particularly well-suited to the needs of graduate students and engineers already familiar with the basics of hybrid vehicles but who wish to learn more about their control strategies.
Author | : Mingwei Shan |
Publisher | : |
Total Pages | : 238 |
Release | : 2009 |
Genre | : Hybrid electric vehicles |
ISBN | : |
Download Modeling and Control Strategy for Series Hydraulic Hybrid Vehicles Book in PDF, Epub and Kindle
Series hydraulic hybrid technology has the potential to significantly improve fuel economy and reduce emission. The series hydraulic hybrid is very different from electric and parallel hydraulic configuration and requires a unique power management control strategy to realize its optimal potential. In this dissertation, three approaches to achieve optimality are proposed and analyzed. These are rule-based, intelligent, and mixed power management control strategy. For evaluating the performance of control strategies, a forward-facing closed-loop simulation model based on physical features is first established in the MATLAB/SIMULINK environment. We then introduce a simple, valid and easily implementable rule-based power management control strategy. To derive the control signals, a PID-based multi-stage controller is presented. A thorough analysis on a class VI medium truck is elucidated. The simulation results demonstrate that a series hydraulic hybrid medium truck with the proposed rule-based power management control strategy results in fuel economy increases of 117% and 44% over the conventional baseline respectively over Federal Urban Driving Schedule (FUDS) and Federal Highway Driving Schedule (FHDS). Then, an intelligent power management control strategy incorporating artificial neural networks (ANNs) and dynamic programming (DP) algorithm applied to series hydraulic hybrid propulsion systems is presented. ANNs are used to forecast vehicle speed and DP is utilized to find the optimal control actions for gear shifting and dual power source splitting. A thorough analysis of effect on fuel economy with different prediction window size on the class VI medium truck over FUDS and FHDS is presented. Compared with conventional baseline, the simulation results demonstrate that series hydraulic hybrid medium truck with 20 seconds short-term prediction window enables fuel economy increase of 135% and 48% respectively over FUDS and FHDS. Although the intelligent power management control strategy has obvious advantages over rule-based control strategy in improving fuel economy, this approach is somewhat limited in a realistic application due to prediction error. Finally, we proposed a mixed power management control strategy incorporating intelligent and rule-based approach to obtain a practicable near-optimal control strategy. Validations of these three power management control strategies are performed by Vehicle Propulsion Systems Evaluation Tool (VPSET) developed at Southwest Research Institute.
Author | : Bram de Jager |
Publisher | : Springer Science & Business Media |
Total Pages | : 159 |
Release | : 2013-04-05 |
Genre | : Technology & Engineering |
ISBN | : 1447150767 |
Download Optimal Control of Hybrid Vehicles Book in PDF, Epub and Kindle
Optimal Control of Hybrid Vehicles provides a description of power train control for hybrid vehicles. The background, environmental motivation and control challenges associated with hybrid vehicles are introduced. The text includes mathematical models for all relevant components in the hybrid power train. The power split problem in hybrid power trains is formally described and several numerical solutions detailed, including dynamic programming and a novel solution for state-constrained optimal control problems based on the maximum principle. Real-time-implementable strategies that can approximate the optimal solution closely are dealt with in depth. Several approaches are discussed and compared, including a state-of-the-art strategy which is adaptive for vehicle conditions like velocity and mass. Three case studies are included in the book: • a control strategy for a micro-hybrid power train; • experimental results obtained with a real-time strategy implemented in a hybrid electric truck; and • an analysis of the optimal component sizes for a hybrid power train. Optimal Control of Hybrid Vehicles will appeal to academic researchers and graduate students interested in hybrid vehicle control or in the applications of optimal control. Practitioners working in the design of control systems for the automotive industry will also find the ideas propounded in this book of interest.
Author | : Xiaolin Tang |
Publisher | : Springer Nature |
Total Pages | : 126 |
Release | : 2022-06-01 |
Genre | : Technology & Engineering |
ISBN | : 3031014987 |
Download Noise and Torsional Vibration Analysis of Hybrid Vehicles Book in PDF, Epub and Kindle
Thanks to the potential of reducing fuel consumption and emissions, hybrid electric vehicles (HEVs) have been attracting more and more attention from car manufacturers and researchers. Due to involving two energy sources, i.e., engine and battery, the powertrain in HEVs is a complicated electromechanical coupling system that generates noise and vibration different from that of a traditional vehicle. Accordingly, it is very important to explore the noise and vibration characteristics of HEVs. In this book, a hybrid vehicle with two motors is taken as an example, consisting of a compound planetary gear set (CPGS) as the power-split device, to analyze the noise and vibration characteristics. It is specifically intended for graduates and anyone with an interest in the electrification of full hybrid vehicles. The book begins with the research background and significance of the HEV. The second chapter presents the structural description and working principal of the target hybrid vehicle. Chapter 3 highlights the noise, vibration, and harshness (NVH) tests and corresponding analysis of the hybrid powertrain. Chapter 4 provides transmission system parameters and meshing stiffness calculation. Chapter 5 discusses the mathematical modeling and analyzes torsional vibration (TV) of HEVs. Finally, modeling of the hybrid powertrain with ADAMS is given in Chapter 6.