Continuously Variable Power-Split Transmission with a Step Gear Set PDF Download
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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: Pakorn Boonpiamsak
Publisher: LAP Lambert Academic Publishing
ISBN: 9783847318446
Category :
Languages : en
Pages : 84
Get Book Here
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: Serhan Ozdemir
Publisher:
ISBN:
Category :
Languages : en
Pages : 188
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Book Description
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: Richard Folkson
Publisher: Elsevier
ISBN: 0857097423
Category : Technology & Engineering
Languages : en
Pages : 803
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Book Description
Most vehicles run on fossil fuels, and this presents a major emissions problem as demand for fuel continues to increase. Alternative Fuels and Advanced Vehicle Technologies gives an overview of key developments in advanced fuels and vehicle technologies to improve the energy efficiency and environmental impact of the automotive sector. Part I considers the role of alternative fuels such as electricity, alcohol, and hydrogen fuel cells, as well as advanced additives and oils, in environmentally sustainable transport. Part II explores methods of revising engine and vehicle design to improve environmental performance and fuel economy. It contains chapters on improvements in design, aerodynamics, combustion, and transmission. Finally, Part III outlines developments in electric and hybrid vehicle technologies, and provides an overview of the benefits and limitations of these vehicles in terms of their environmental impact, safety, cost, and design practicalities. Alternative Fuels and Advanced Vehicle Technologies is a standard reference for professionals, engineers, and researchers in the automotive sector, as well as vehicle manufacturers, fuel system developers, and academics with an interest in this field. Provides a broad-ranging review of recent research into advanced fuels and vehicle technologies that will be instrumental in improving the energy efficiency and environmental impact of the automotive sector Reviews the development of alternative fuels, more efficient engines, and powertrain technologies, as well as hybrid and electric vehicle technologies
Author: Martin G Gabriel
Publisher: SAE International
ISBN: 0768055296
Category : Technology & Engineering
Languages : en
Pages : 116
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Book Description
The automotive transmission plays a vital role in the vehicle powertrain, yet in an optimum operation environment it is invisible to the customer. This report examines the technological innovations in transmission design that contribute to important overall vehicle characteristics such as fuel economy, vehicle performance, quality and reliability. This book is a reference providing background and solid supportive data for the manager and engineer with responsibility for directing the application of the transmission in vehicle design concepts. Historical information is briefly reviewed as a basis for the state of development of future transmissions. Topics Covered: Transmission Types Gearing the Transmission Transmission Controls Performance Attributes Transmission Efficiency and Internal Component Power Losses Harnessing Noise, Vibration, and Harshness (NVH) and more
Author: Tom C. Hausenbauer
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 444
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Book Description
Author: Giesbert Lechner
Publisher: Springer Science & Business Media
ISBN: 9783540659037
Category : Technology & Engineering
Languages : en
Pages : 476
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Book Description
This book seeks to impart lines of reasoning, demonstrate approaches, and provide comprehensive data for practical tasks. Although much of the content is concerned with aspects of technology and production that are of general validity, and hence of enduring relevance, there is also a chapter on various state-of-the-art production designs. The strong market dynamics in recent years is reflected in numerous new transmission types, and major lines of evolution treated include the increasing use of electronics, light-weight construction, and the automation of manual gearboxes. The expertise recorded here mainly springs from joint projects between German and international car and gear manufacturers.
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: Q. Ren
Publisher:
ISBN:
Category : Hybrid electric vehicles
Languages : en
Pages : 7
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Book Description
Author: Robert Fischer
Publisher: Springer
ISBN: 3319052632
Category : Technology & Engineering
Languages : en
Pages : 372
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Book Description
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.
