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An Analysis Of Variable Compression Ratio Engine
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Book Synopsis An Analysis of Variable Compression Ratio Engine by :
Download or read book An Analysis of Variable Compression Ratio Engine written by and published by . This book was released on 2017 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The variable compression ratio engine presents several advantages to efficiency and power density. At low power output, the engine can be made to operate as a high compression ratio naturally aspirated engine. When high power output is demanded, the engine can be made to operate as a low compression ratio heavily boosted engine. The tremendous power density potential also presents the engine designer with a large opportunity for displacement downsizing while still meeting power requirements for the application.
Book Synopsis Design and Analysis of a Variable-compression, Ratio Internal-combustion Engine by : Marcus Clayton Stewart
Download or read book Design and Analysis of a Variable-compression, Ratio Internal-combustion Engine written by Marcus Clayton Stewart and published by . This book was released on 1997 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mathematical Analysis and Comparison of Test Results of a Variable Compression Ratio Automotive Engine by : William Corbin Elrod
Download or read book Mathematical Analysis and Comparison of Test Results of a Variable Compression Ratio Automotive Engine written by William Corbin Elrod and published by . This book was released on 1951 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Single Cylinder Variable Compression Ratio 4-stroke Engine by : Firdaus Haikal Ramli
Download or read book Design of Single Cylinder Variable Compression Ratio 4-stroke Engine written by Firdaus Haikal Ramli and published by . This book was released on 2012 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is about designing a new method to increase engines efficiency. The method used in this study is variable compression ratio (VCR) engines, where the compression ratio of the engine can be changed according to driving conditions. A mechanism of VCR is designed and simulated. The motion analysis is used to analyze the VCR mechanism and engines component behaviour under different compression ratio. Solidworks simulation software is used to perform the motion analysis. The data of stress distribution, deformation of engines component and factor of safety (FOS) from the simulation are used to determine whether the components are safe to operate at compression ratio higher than the original. Yamaha FZ150i engine has been chosen as the baseline engine design. The engine are disassembled and modelled in solidworks in order to perform the simulation. The engine is simulated at 2000 rpm and the compression ratio are varies between 8:1 and 18:1. The result from of the simulation indicates that the compression ratio can safely be increased up to 12:1 with the original engines component specifications. If higher compression ratio wanted to be used, the specification of the engines component (piston and connecting rod) needed to be changed .However, since the Factor of safety (FOS) value of the components is critical at certain compression ratio, the fatigue and thermal analysis is purposed to be carried out in order to obtain more accurate result.
Book Synopsis Analysis of the Combustion Process of a Spark Ignition Engine with a Variable Compression Ratio by :
Download or read book Analysis of the Combustion Process of a Spark Ignition Engine with a Variable Compression Ratio written by and published by . This book was released on 1987 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cost, Effectiveness, and Deployment of Fuel Economy Technologies for Light-Duty Vehicles by : National Research Council
Download or read book Cost, Effectiveness, and Deployment of Fuel Economy Technologies for Light-Duty Vehicles written by National Research Council and published by National Academies Press. This book was released on 2015-09-28 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: The light-duty vehicle fleet is expected to undergo substantial technological changes over the next several decades. New powertrain designs, alternative fuels, advanced materials and significant changes to the vehicle body are being driven by increasingly stringent fuel economy and greenhouse gas emission standards. By the end of the next decade, cars and light-duty trucks will be more fuel efficient, weigh less, emit less air pollutants, have more safety features, and will be more expensive to purchase relative to current vehicles. Though the gasoline-powered spark ignition engine will continue to be the dominant powertrain configuration even through 2030, such vehicles will be equipped with advanced technologies, materials, electronics and controls, and aerodynamics. And by 2030, the deployment of alternative methods to propel and fuel vehicles and alternative modes of transportation, including autonomous vehicles, will be well underway. What are these new technologies - how will they work, and will some technologies be more effective than others? Written to inform The United States Department of Transportation's National Highway Traffic Safety Administration (NHTSA) and Environmental Protection Agency (EPA) Corporate Average Fuel Economy (CAFE) and greenhouse gas (GHG) emission standards, this new report from the National Research Council is a technical evaluation of costs, benefits, and implementation issues of fuel reduction technologies for next-generation light-duty vehicles. Cost, Effectiveness, and Deployment of Fuel Economy Technologies for Light-Duty Vehicles estimates the cost, potential efficiency improvements, and barriers to commercial deployment of technologies that might be employed from 2020 to 2030. This report describes these promising technologies and makes recommendations for their inclusion on the list of technologies applicable for the 2017-2025 CAFE standards.
Book Synopsis A Variable Compression Ratio Engine Development by :
Download or read book A Variable Compression Ratio Engine Development written by and published by . This book was released on 1963 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of Fuel Economy Technologies for Light-Duty Vehicles by : National Research Council
Download or read book Assessment of Fuel Economy Technologies for Light-Duty Vehicles written by National Research Council and published by National Academies Press. This book was released on 2011-06-03 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Envera Variable Compression Ratio Engine by :
Download or read book Envera Variable Compression Ratio Engine written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Aggressive engine downsizing, variable compression ratio and use of the Atkinson cycle are being combined to improve fuel economy by up to 40 percent relative to port fuel injected gasoline engines, while maintaining full engine power. Approach Engine downsizing is viewed by US and foreign automobile manufacturers as one of the best options for improving fuel economy. While this strategy has already demonstrated a degree of success, downsizing and fuel economy gains are currently limited. With new variable compression ratio technology however, the degree of engine downsizing and fuel economy improvement can be greatly increased. A small variable compression ratio (VCR) engine has the potential to return significantly higher vehicle fuel economy while also providing high power. Affordability and potential for near term commercialization are key attributes of the Envera VCR engine. VCR Technology To meet torque and power requirements, a smaller engine needs to do more work per stroke. This is typically accomplished by boosting the incoming charge with either a turbo or supercharger so that more energy is present in the cylinder per stroke to do the work. With current production engines the degree of engine boosting (which correlates to downsizing) is limited by detonation (combustion knock) at high boost levels. Additionally, the turbo or supercharger needs to be responsive and efficient while providing the needed boost. VCR technology eliminates the limitation of engine knock at high load levels by reducing compression ratio to ≈9:1 (or whatever level is appropriate) when high boost pressures are needed. By reducing the compression ratio during high load demand periods there is increased volume in the cylinder at top dead center (TDC) which allows more charge (or energy) to be present in the cylinder without increasing the peak pressure. Cylinder pressure is thus kept below the level at which the engine would begin to knock. When loads on the engine are low the compression ratio can be raised (to as much as 18:1) providing high engine efficiency. It is important to recognize that for a well designed VCR engine cylinder pressure does not need to be higher than found in current production turbocharged engines. As such, there is no need for a stronger crankcase, bearings and other load bearing parts within the VCR engine. The Envera VCR mechanism uses an eccentric carrier approach to adjust engine compression ratio. The crankshaft main bearings are mounted in this eccentric carrier or 'crankshaft cradle' and pivoting the eccentric carrier 30 degrees adjusts compression ratio from 9:1 to 18:1. The eccentric carrier is made up of a casting that provides rigid support for the main bearings, and removable upper bearing caps. Oil feed to the main bearings transits through the bearing cap fastener sockets. The eccentric carrier design was chosen for its low cost and rigid support of the main bearings. A control shaft and connecting links are used to pivot the eccentric carrier. The control shaft mechanism features compression ratio lock-up at minimum and maximum compression ratio settings. The control shaft method of pivoting the eccentric carrier was selected due to its lock-up capability. The control shaft can be rotated by a hydraulic actuator or an electric motor. The engine shown in Figures 3 and 4 has a hydraulic actuator that was developed under the current program. In-line 4-cylinder engines are significantly less expensive than V engines because an entire cylinder head can be eliminated. The cost savings from eliminating cylinders and an entire cylinder head will notably offset the added cost of the VCR and supercharging. Replacing V6 and V8 engines with in-line VCR 4-cylinder engines will provide high fuel economy at low cost. Numerous enabling technologies exist which have the potential to increase engine efficiency. The greatest efficiency gains are realized when the right combination of advanced and new technologies are packaged together to provide the greatest gains at the least cost. Aggressive engine downsizing with variable compression ratio and use of the extended Atkinson cycle can provide large fuel economy gains that are exceptionally cost effective. Analysis indicates that a 2.2L supercharged Envera VCR engine can match the torque of a larger V8 engine at 2000 rpm. The VCR engine's high torque value at low engine speed is beneficial for maintaining the driving feel and responsiveness of the larger V8 engine. The Envera VCR engine will attain high efficiency at ≈100 Nm primarily due to the combination of engine down-sizing and use of the Atkinson cycle. Qualitatively the fuel economy gain realized from down-sizing from a V8 to an Atkinson-cycle I-4 is about twice as large as the benefits from down-sizing from a V8 to a Turbo V6 when evaluated at 100 Nm 2000 rpm.
Book Synopsis Numerical and Experimental Studies on Combustion Engines and Vehicles by : Paweł Woś
Download or read book Numerical and Experimental Studies on Combustion Engines and Vehicles written by Paweł Woś and published by BoD – Books on Demand. This book was released on 2020-11-26 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: The matters discussed and presented in the chapters of this book cover a wide spectrum of topics and research methods commonly used in the field of engine combustion technology and vehicle functional systems. This book contains the results of both computational analyses and experimental studies on jet and reciprocating combustion engines as well heavy-duty onroad vehicles. Special attention is devoted to research and measures toward preventing the emission of harmful exhaust components, reducing fuel consumption or using unconventional methods of engine fueling or using renewable and alternative fuels in different applications. Some technical improvements in design and control of vehicle systems are also presented.
Book Synopsis Design and Construction of a Variable Compression Ratio Engine by : H. N. Arthur
Download or read book Design and Construction of a Variable Compression Ratio Engine written by H. N. Arthur and published by . This book was released on 1949 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Variable Compression Ratio (VCR) Engine by : Milind Yadav
Download or read book Novel Variable Compression Ratio (VCR) Engine written by Milind Yadav and published by LAP Lambert Academic Publishing. This book was released on 2012-03 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional gasoline engines work on the fixed compression ratio which is a golden mean between the knocking at high loads and fuel economy at low loads. A variable compression ratio engine can work at various compression ratios depending upon the vehicle performance needs. Engine downsizing, great fuel economy, no knocking operation and flexibility in fuel used make them a brilliant choice as automotive engines in near future. However the VCR engines also suffers from disadvantage of mass manufacturing due to their complexity. The author of the present book studied the details of VCR engines and proposed a concept of conversion of fixed compression ratio in to a variable compression ratio engine. The newly designed mechanism makes use of a split type of cylinder block which varies the compression ratio by lifting the cylinder head. The mechanism can be loaded on two stroke as well as four stroke engines. Mechanical simplicity, improved fuel economy and increase in the brake thermal and volumetric efficiency are the major advantages after conversion of fixed compression ratio engine into a variable compression ratio engine.
Book Synopsis A Correlation of the Effects of Compression Ratio and Inlet-air Temperature on the Knock Limits of Aviation Fuels in a CFR Engine - 2 by : Henry E. Alquist
Download or read book A Correlation of the Effects of Compression Ratio and Inlet-air Temperature on the Knock Limits of Aviation Fuels in a CFR Engine - 2 written by Henry E. Alquist and published by . This book was released on 1946 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The knock-limited performance of nine fuels, comprising isolated members of four classes of hydrocarbons, paraffins, cycloparaffins, and olefins), is presented in the form of three-dimensional plots of fuel-air ratio, compression temperature, and compression-air density. The plots are based on a correlation that is shown to apply for these fuels over a wide range of compression that is shown to apply for these fuels over a wide range of compression ratios and inlet-air temperatures. The significance of the term "temperature sensitivity" is sketched, and it is emphasized that no generalized number such as octane number can be applied even to members of a given class of hydrocarbons when broad ranges of engine severity are encountered.
Book Synopsis A Variable Compression Ratio Engine Development by W.A. Wallace and F.B. Lux by : W.A. Wallace
Download or read book A Variable Compression Ratio Engine Development by W.A. Wallace and F.B. Lux written by W.A. Wallace and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Variable Compression Ratio Head for an Internal Combustion Engine by : Walter P. Wright
Download or read book A Variable Compression Ratio Head for an Internal Combustion Engine written by Walter P. Wright and published by . This book was released on 1954 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Power and Economy of an Automatically Variable Compression Ratio Engine by : John Charles Fox
Download or read book Power and Economy of an Automatically Variable Compression Ratio Engine written by John Charles Fox and published by . This book was released on 1950 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Variable Compression Ratio Engine With Biodiesel by : Ahmed Zahid Hussain
Download or read book Variable Compression Ratio Engine With Biodiesel written by Ahmed Zahid Hussain and published by Alibaba. This book was released on 2023-05-22 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Variable Compression Ratio Engine with Biodiesel" by Ahmed Zahid Hussain delves into the exciting realm of advanced automotive technology, exploring the revolutionary concept of variable compression ratio engines powered by biodiesel. This ground-breaking book serves as a comprehensive guide for engineers, researchers, and automotive enthusiasts alike who seek to understand and harness the potential of this innovative propulsion system. Ahmed Zahid Hussain, a distinguished expert in the field of alternative fuels and engine design, presents a meticulously researched and well-crafted exploration of variable compression ratio engines. These engines, capable of adjusting their compression ratio on the fly, offer numerous advantages in terms of performance, efficiency, and environmental impact. Hussain takes readers on an enlightening journey through the principles, design considerations, and practical applications of this cutting-edge technology. The book provides an in-depth analysis of biodiesel, a renewable and sustainable fuel derived from organic sources, and its compatibility with variable compression ratio engines. Hussain offers valuable insights into the combustion characteristics, emissions, and overall performance of biodiesel in this context. Through rigorous scientific analysis and case studies, readers gain a comprehensive understanding of the benefits and challenges associated with biodiesel utilization in variable compression ratio engines. "Variable Compression Ratio Engine with Biodiesel" is a unique blend of theoretical knowledge and practical implementation. Hussain discusses the design and optimization of these engines, highlighting the key parameters that influence their performance. Furthermore, he explores the potential of utilizing biodiesel blends, engine management systems, and other auxiliary technologies to maximize the benefits of this powerful combination. As the world continues to grapple with the challenges of climate change and the need for sustainable energy solutions, this book offers a timely and compelling contribution. Ahmed Zahid Hussain's expertise and passion shine through every chapter, making this a must-read for professionals and enthusiasts seeking to shape the future of automotive engineering. Whether you are an engineer interested in pushing the boundaries of engine design, a researcher exploring alternative fuel options, or simply a curious reader intrigued by the latest advancements in automotive technology, "Variable Compression Ratio Engine with Biodiesel" provides an invaluable resource that will inform and inspire. Get ready to embark on a captivating journey that merges innovation, sustainability, and performance in the pursuit of a greener future for transportation.
