Actuated Continuously Variable Transmission for Small Vehicles PDF Download
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Author: John H. Gibbs
Publisher:
ISBN:
Category : All terrain vehicles
Languages : en
Pages : 48
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Book Description
"This thesis is to research the possibility of improving the performance of continuously variable transmission (CVT) used in small vehicles (such as ATVs, snowmobiles, golf carts, and SAE Baja cars) via controlled actuation of the CVT. These small vehicles commonly use a purely mechanically controlled CVT that relies on weight springs and cams actuated based on the rotational speed on the unit. Although these mechanically actuated CBTs offer an advantage over manual transmissions in performance via automatic operation, they can't reach the full potential of a CVT. A hydraulically actuated CVT can be precisely controlled in order to maximize the performance and fuel efficiency but a price has to be paid for the energy required to constantly operate the hydraulics. Unfortunately, for small vehicles the power required to run a hydraulically actuated CVT may outweigh the gain in CVT efficiency. The goal of this thesis is to show how an electromechanically actuated CVT can maximize the efficiency of a CVT transmission without requiring too much power to operate."--Abstract.
Author: John H. Gibbs
Publisher:
ISBN:
Category : All terrain vehicles
Languages : en
Pages : 48
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Book Description
"This thesis is to research the possibility of improving the performance of continuously variable transmission (CVT) used in small vehicles (such as ATVs, snowmobiles, golf carts, and SAE Baja cars) via controlled actuation of the CVT. These small vehicles commonly use a purely mechanically controlled CVT that relies on weight springs and cams actuated based on the rotational speed on the unit. Although these mechanically actuated CBTs offer an advantage over manual transmissions in performance via automatic operation, they can't reach the full potential of a CVT. A hydraulically actuated CVT can be precisely controlled in order to maximize the performance and fuel efficiency but a price has to be paid for the energy required to constantly operate the hydraulics. Unfortunately, for small vehicles the power required to run a hydraulically actuated CVT may outweigh the gain in CVT efficiency. The goal of this thesis is to show how an electromechanically actuated CVT can maximize the efficiency of a CVT transmission without requiring too much power to operate."--Abstract.
Author: Bruce D Anderson
Publisher: SAE International
ISBN: 0768096383
Category : Technology & Engineering
Languages : en
Pages : 399
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Book Description
This reference contains the latest knowledge on vehicle development with CVT powertrains, transmission assembly design and performance, and the design and development of the five major components of CVT technology: launch device, variator systems, geartrains, control systems, and lubrication. Building on an earlier SAE publication, the 37 technical papers selected for this book cover updated information on a variety of topics within the area of CVTs. Although this book is not intended to represent the full body of CVT technology, it provides technical presentations and their reference documents, which can lead to discussions covering several topics of interest in CVTs.
Author: Bruce D Anderson
Publisher: SAE International
ISBN: 0768017084
Category : Technology & Engineering
Languages : en
Pages : 399
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Book Description
This reference contains the latest knowledge on vehicle development with CVT powertrains, transmission assembly design and performance, and the design and development of the five major components of CVT technology: launch device, variator systems, geartrains, control systems, and lubrication. Building on an earlier SAE publication, the 37 technical papers selected for this book cover updated information on a variety of topics within the area of CVTs. Although this book is not intended to represent the full body of CVT technology, it provides technical presentations and their reference documents, which can lead to discussions covering several topics of interest in CVTs.
Author: Pakorn Boonpiamsak
Publisher: LAP Lambert Academic Publishing
ISBN: 9783847318446
Category :
Languages : en
Pages : 84
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Book Description
Recently, continuously variable transmission (CVT) has been much more applied in vehicles as it has several advantages such as smoothly gear changing and allowing engine operate at optimum speed. However, there are some important drawbacks which are low efficiency power transmission, especially at low speed (high torque) condition, limited belt torque capacity, and narrow overall gear ratio range, with which the CVT is limited to use in only small vehicles. To overcome these weak points and simultaneously keep the advantages of CVT, a planetary gear train (PGT) and a step gear box are implemented to the traditional CVT system called continuously variable power split transmission (CVPST) with step gear box system. The power from the engine will be separated into two ways; PGT and CVT. As the higher efficiency of PGT than CVT, the overall system efficiency will increase. Also, because only a part of the total power will go through the CVT set, the torque capacity of the overall system can be extended. The additional step gear box is used to enhance the overall gear ratio range. By simulation, the fuel economy and 0-60 time performance of both transmissions can be compared.
Author: Harald Naunheimer
Publisher: Springer Science & Business Media
ISBN: 3642162142
Category : Technology & Engineering
Languages : en
Pages : 740
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Book Description
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.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309373913
Category : Science
Languages : en
Pages : 812
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Book Description
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.
Author: Victor Albert Walter Hillier
Publisher: Nelson Thornes
ISBN: 9780748780822
Category : Design
Languages : en
Pages : 552
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Book Description
Significantly updated to cover the latest technological developments and include latest techniques and practices.
Author:
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 414
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Book Description
Author: Julian Happian-Smith
Publisher: Elsevier
ISBN: 0080523048
Category : Technology & Engineering
Languages : en
Pages : 601
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Book Description
An Introduction to Modern Vehicle Design provides a thorough introduction to the many aspects of passenger car design in one volume. Starting with basic principles, the author builds up analysis procedures for all major aspects of vehicle and component design. Subjects of current interest to the motor industry, such as failure prevention, designing with modern materials, ergonomics and control systems are covered in detail, and the author concludes with a discussion on the future trends in automobile design. With contributions from both academics lecturing in motor vehicle engineering and those working in the industry, "An Introduction to Modern Vehicle Design" provides students with an excellent overview and background in the design of vehicles before they move on to specialised areas. Filling the niche between the more descriptive low level books and books which focus on specific areas of the design process, this unique volume is essential for all students of automotive engineering. Only book to cover the broad range of topics for automobile design and analysis procedures Each topic written by an expert with many years experience of the automotive industry
Author: Emerson L. Kumm
Publisher:
ISBN:
Category :
Languages : en
Pages : 148
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Book Description
