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Dissertations / Theses on the topic 'Continuously variable transmission'

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Published: 4 June 2021

Last updated: 21 February 2023

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1

Gibbs, John H. "Actuated Continuously Variable Transmission for Small Vehicles." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1238819759.

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2

Wells, Dax B. "Investigation of Mechanical Differentials as Continuously Variable Transmissions." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2904.

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In recent years the increasing demand for fuel efficient and less pollutant vehicles has stimulated the development of hybrid and electric vehicles. These vehicle platforms often incorporate drivetrains which utilize multiple power sources for vehicle propulsion in an effort to increase fuel mileage and reduce emissions. Coupling multiple power sources, such as an internal combustion engine and electric motor(s), has new challenges in drivetrain design. Understanding the torque and rpm relationships within the power transmission device used to combine power sources is fundamental to overcoming

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3

McCandless, John Gregory. "Design of a belt-driven continuously variable transmission." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12147.

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4

Andersen, Brian S. "An Investigation of a Positive Engagement, Continuously Variable Transmission." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1878.pdf.

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5

Willis, Christopher Ryan. "A Kinematic Analysis and Design of a Continuously Variable Transmission." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/79677.

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This thesis describes a method for analyzing and designing a continuously variable transmission (CVT). The analysis process is implemented in a software package that can be used to tune a CVT for a given application. The analysis is accomplished through the use of kinematic principles as well as equations developed from basic energy balances. Although the theory developed can be applied to any CVT, this thesis focuses on a case study using the Team Industries brand CVT applied to the Virginia Tech Mini Baja Team. The work was motivated by the team's need to have a reliable and inexpensive meth

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6

Bell, Colin Alexander. "Constant power-continuously variable transmission (CP-CVT) : optimisation and simulation." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/6279.

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A novel continuously variable transmission has previously been designed that is capable of addressing a number of concerns within the automotive industry such as reduced emissions. At the commencement of this research, the design was in the early stages of development and little attempt had been previously made to optimise the design to meet specific measurable targets. This thesis utilises and modifies several design approaches to take the design from the concept stage to a usable product. Several optimisation techniques are adapted and created to analyse the CVT from both a design and tribol

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7

Haupt, Brandon Levi. "Design and Analysis of a Positively Engaged Continuously Variable Transmission." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2635.pdf.

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8

Dalling, Ryan R. "An Investigation of Positive Engagement, Continuously Variable Transmissions." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2391.pdf.

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9

Smith, Michael Henry. "Vehicle powertrain modeling and ratio optimization for a continuously variable transmission." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17801.

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10

Randall, Austin B. "Investigation of a Planetary Differential for Use as a Continuously Variable Transmission." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3311.

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With gas prices on the rise, the demand for high-mileage and low pollution vehicles has taken on an unprecedented role in our society. The production and implementation of electric and hybrid-electric vehicles has recently been a large focus of all major automobile manufacturers. Although these new vehicles have begun to solve much of the expensive fuel consumption and air pollution problems that our economy faces, the initial cost of these vehicles has proven to still be too expensive to capture a significant portion of the market. The further advancement of this technology must not only cont

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11

Guvey, Serkan. "Dynamic Simulation And Performance Optimization Of A Car With Continuously Variable Transmission." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/2/1095322/index.pdf.

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The continuously variable transmission (CVT), which has been in use in some of the vehicles in the market today, presents the possibility of decoupling the engine speed and the vehicle speed. By this way, it is now possible to operate the engine at its maximum efficient or performance point and fix it at that operating point without losing from the vehicle speed. Instead of using gears, which are the main transmission elements of conventional transmission, CVT uses two pulleys and a belt. By changing the pulley diameters, a continuously variable transmission ratio is obtained. Besides all its

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12

Cyders, Timothy J. "Analysis and Experimental Comparison of Models of a New Form of Continuously Variable Transmission." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1354807440.

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13

Tawi, K. B. "Investigation of belt misalignment effects on metal pushing v-belt continuously variable transmission." Thesis, Cranfield University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387629.

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14

Deacon, Michael. "Optimising the control of a passenger car diesel engine and continuously variable transmission." Thesis, University of Bath, 1996. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362258.

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15

Micklem, J. D. "The investigation and modelling of the steel compression V-belt continuously variable transmission." Thesis, University of Bath, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359731.

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16

Rose, Adam. "Application of a continuously variable transmission to engine boosting and exhaust energy recovery systems." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636513.

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Governments across the world are implementing legislation for ever more strict limits for vehicle emissions; combined with customer expectations for growing levels of performance and equipment, automotive manufacturers face a significant challenge. With the aim of meeting this challenge, downsizing is an established trend in passenger car engine development. However, since downsizing is commonly achieved through pressure charging (turbocharging, for example), the associated benefits in improved fuel economy and emissions are often obtained at the expense of engine dynamic response, and, conseq

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17

Messick, Matthew James. "An Experimentally-Validated V-Belt Model for Axial Force and Efficiency in a Continuously Variable Transmission." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/85055.

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Rubber V-belt Continuously Variable Transmissions (CVT's) are commonplace in the Baja SAE collegiate design competition, and are also used widely in the power sports industry. These transmissions offer benefits of simplicity in mechanical design, consisting of only two pulleys, and are easy to use. While most teams in the competition use commercially available designs, custom designs are becoming more common, and the Baja team at Virginia Tech has used custom CVT's since the 2014 season. The design of these CVT's has relied heavily on trial and error, requiring significant adjustments to be

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18

Ingvast, Johan. "Quadruped robot control and variable leg transmissions." Doctoral thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-600.

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19

Akehurst, Sam. "An investigation into the loss mechanisms associated with a pushing metal V-belt continuously variable transmission." Thesis, University of Bath, 2001. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341585.

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20

Jones, Isaac R. "An Analysis of Analytical Methods to Produce a Varying Angular Output from a Constant Angular Input Using Gearsets." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2621.

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Research in developing a Positively Engaged Continuously Variable Transmission (PECVT) has been underway at Brigham Young University for some time. The inherent problems associated with embodiments of this type of transmission, namely the Non-Integer Tooth Problem (NITP), have been identified. This research is focused on the development of a Positively Engaged Piecewise Continuous Transmission (PEPCT), which is a subset of the PECVT. This document describes the hypothesis and analysis of using non-circular gearsets to overcome the NITP. This proposed solution enables a varying angular output f

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21

Hameer, Sameer Hameer Jaffer. "A comparative study and application of continuously variable transmission to a single main rotor heavy lift helicopter." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/33969.

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Rotorcraft transmission design is limited by empirical weight trends that are proportional to the power/torque raised to the two-thirds coupled with the relative inexperience industry has with the employment of variable speed transmission to heavy lift helicopters of the order of 100,000 lbs gross weight and 30,000 installed horsepower. The advanced rotorcraft transmission program objectives are to reduce transmission weight by at least 25%, reduce sound pressure levels by at least 10 dB, have a 5000 hr mean time between removal, and also incorporate the use of split torque technology in

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22

Narita, Keiichi. "Influences of metal-metal friction characteristics on the performance of metal V-belt type continuously variable transmission." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445840.

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23

Moyers, Joseph. "An investigation into novel hybrid vehicle powertrain configurations with the application of the Milner continuously variable transmission." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558891.

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Over the last few years there has been increasing level of environmental awareness both publicly and commercially. Depleting oil reserves, high fuel prices, environmental taxes, and challenging emissions targets have resulted in increasing pressure on the automotive industry to produce powertrain solutions which reduce fuel consumption and emissions. As a result of these increasing demands, the automotive industry has been investing and developing new technologies in order to reduce fuel consumption. One of the most notable of these new technologies has been the hybrid powertrain; the first pr

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24

Grupenhof, Kyle D. "Continuously Variable Amplification Device for Semi-Active Vibration Control of Seismically Loaded Structures." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1337969875.

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25

Patrão, Hernâni Martins. "Modelação de variadores contínuos de relação de transmissão." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/9713.

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Dissertação para obtenção do Grau de Mestre em Engenharia Mecânica<br>O crescente mercado das transmissões de variável continua tem como exigência fulcral uma caracterização aprofundada de todos os seus aspectos funcionais conhecidos e constantemente sejam actualizados. Existem inúmeros tipos de transmissões deste tipo sendo que se optou pela modelagem do sistema de polias de diâmetro variável tendo como meio de ligação uma correia. Tendo sempre a noção de que as transmissões são dos elementos mais utilizados em sistemas de transmissão de força como meio de desmultiplicar o movimento de entra

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26

Alkan, Deniz. "Investigating CVT as a Transmission System Option for Wind Turbines." Thesis, KTH, Energiteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121187.

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In this study, an innovative solution is examined for transmission problems and frequency control for wind Turbines. Power electronics and the gear boxes are the parts which are responsible of a significant amount of failures and they are increasing the operation and maintenance cost of wind turbines. Continuously transmission (CVT) systems are investigated as an alternative for conventional gear box technologies for wind turbines in terms of frequency control and power production efficiency. Even though, it has being used in the car industry and is proven to be efficient, there are very limit

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27

Mullen, John A. "Analytical and Experimental Comparison of a Positive Displacement Water Pump Using an Infinitely Variable Transmission." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1492125053378972.

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28

Lukas, Martynas. "Elektrinio variatoriaus panaudojimas dyzelinio variklio darbo optimizavimui." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130611_134356-26786.

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Darbe nagrinėjami elektros varikliais valdomi planetiniai reduktoriai - variatoriai. Atliktos mokslinių straipsnių analizės metu susipažinta su įvairių rūšių automobiliuose naudojamomis transmisijomis: pateikta jų klasifikacija, apžvelgtos dažniausiai naudojamos transporte pavarų dėžės. Pateikta tyrimo metodika, apžvelgti eksperimentinių tyrimų įrenginiai ir priemonės. Atlikti elektros varikliu valdomo planetinio reduktoriaus eksperimentai su suprojektuotu tyrimo stendu. Palygintos belaipsnės pavarų dėžės su parinktu dyzeliniu varikliu, bei pateiktos išvados ir rekomendacijos.<br>This thesis a

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29

Mower, D. Adam. "An Investigation of Wear-Resistant Coatings on an A390 Die-Cast Aluminum Substrate." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1765.pdf.

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30

Srivastava, Nilabh. "Modeling and simulation of friction-limited continuously variable transmissions." Connect to this title online, 2006. http://etd.lib.clemson.edu/documents/1171293786/.

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31

Bonnet, Baptiste. "Matching of Internal Combustion Engine Characteristics for Continuously Variable Transmissions." Thesis, Cranfield University, 2007. http://hdl.handle.net/1826/3205.

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This work proposes to match the engine characteristics to the requirements of the Continuously Variable Transmission [CVT] powertrain. The normal process is to pair the transmission to the engine and modify its calibration without considering the full potential to modify the engine. On the one hand continuously variable transmissions offer the possibility to operate the engine closer to its best efficiency. They benefit from the high versatility of the effective speed ratio between the wheel and the engine to match a driver requested power. On the other hand, this concept demands slightly diff

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32

Wicke, Volker. "Driveability and control aspects of vehicles with continuously variable transmissions." Thesis, University of Bath, 2001. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393832.

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33

Chuang, Jason C. "Variable Speed Flapping Wing Micro Air Vehicle using a Continuous Variable Transmission Design." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401813452.

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34

Ribeiro, Felipe. "Estudos de aplicações de transmissão continuamente variável (CVT) em geradores eólicos de médio porte." reponame:Repositório Institucional da UFABC, 2010.

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35

Sanhaji, Mani Ahmed. "Contribution à la réalisation d'un système de transmission de couple à vitesse variable." Rouen, 1995. http://www.theses.fr/1995ROUES057.

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Les travaux de la thèse portent sur une contribution à la réalisation d'un système de transmission de couple à vitesse variable afin d'aboutir à ce que l'on pourrait appeler une boite de vitesse électromécanique à variation continue. Un moteur asynchrone et un alternateur sont couplés de façon rigide par leurs rotors. Le stator du moteur asynchrone est entraîné en rotation par l'application d'une puissance motrice extérieure P1 avec un couple de rotation G1. Le stator de l'alternateur, qui est le siège des courants induits, tourne selon la puissance P2 transmise avec un couple G2. L'énergie él

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36

Cho, Chang-Yeh, and 卓昌衍. "Vibrations of Flat Belt Continuously Variable Transmission." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/41258074367675159689.

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37

Tu, Yu-Jui, and 杜育瑞. "Electronically-Controlled Continuously Variable Transmission Systems for Motorcycles." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/x9htrv.

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碩士<br>崑山科技大學<br>機械工程研究所<br>91<br>The V-belt Continuously Variable Transmission (CVT) systems are widely used in almost all kinds of scooters. The major mechanism of the traditional CVT is composed of centrifugal rollers, the compression spring and the torque cam. They are used to adjust the speed ratios for complying with the engine speed and the rear wheel load. In addition to the low transmission efficiency at the lower speed, the centrifugal rollers and movable flange have the worn-up problems which may reduce the materials life-cycle. In order to improve these problems, the aim of our stud

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38

WANG, YOU-HAN, and 王郁涵. "Stationary Bike with Continuously Variable Transmission of Resistance." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/c76g5x.

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碩士<br>南臺科技大學<br>機械工程系<br>104<br>This research aimed to design a set of outdoor use conform resistance-type stepless load foot-fitness, which target groups for the elderly or outdoor public sports equipment users, take advantage of our home fitness equipment nearby, we will be able to effectively carry muscle power intensive training. This research purpose is a congenital conditions for the Continuously Variable Transmission system, by modifying the original system parts. In the part of the drive mechanism, using compound gear train to increase speeds and employing conventional friction clutch

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39

HuangDeng-Jin and 黃登進. "Creative Design on an Electronically-Controlled Continuously Variable Transmission." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/91775318769561790063.

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碩士<br>崑山科技大學<br>機械工程研究所<br>95<br>This research is mainly on the creative designing of electronically- controlled continuously variable transmission (ECVT) for motorcycles, and aim to get rid of the constant speed ratio curve restriction of the traditional CVT. Part of the engine power is transmitted to the transmission system for speed ratio change. A synchronous mechanism is use to reach the function of engage and disengage which is accomplished via a step motor. A power screw is used to actuate the movable sheave of the driving pulley to change the speed ratio. The computer software MATLAB

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40

Hu, Bi Shyang, and 胡筆祥. "OPTIMAL DESIGN FOR CONTINUOUSLY VARIABLE TRANSMISSION OF RUBBER V-BELT." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/97877802771202129905.

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碩士<br>國立臺灣大學<br>機械工程學系研究所<br>86<br>The design for V-belt CVT is a process of trial and error for multivariable. The objective function and constraint conditions are affected by multivariable. It is a difficult problem for designers that how to decide the variable value. Here use the simulated annealing algorithm, one of the numerical method of the optimization, to transfer the process into the computer search such that can save the time of finding the optimal solution. The simulated anneali

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41

Yoon, Hee-Duk. "Evaluation of a continuously variable transmission utilizing non-circular gears." 1995. http://catalog.hathitrust.org/api/volumes/oclc/33141582.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1995.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 75-77).

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42

Chung, Yuan-Yung, and 鍾源勇. "Dynamic analysis of a rubber-v-belt continuously variable transmission." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/67274736965893643265.

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碩士<br>國立清華大學<br>動力機械工程學系<br>85<br>Smoother speed change, high speed-ratio range at the rated speed and load,a simpler mechanism with low cost and less maintenance, etc., have been theultimate goals for transmission design engineers. The belt-driven CVT can nearlyfulfill these requirements. However, the characteristics of less efficiency andlower load-carrying capacity have hampered the applications. This research presents an analytical and experimental investigation on the dynamic behaviors of the CVT under steady-state conditions. It includes the analyses of the speed-ratio-changing mecha

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43

He, Wei-Ta, and 何威達. "Numerical Modeling of Heat Dissipation in the Continuously Variable Transmission." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/9h5k86.

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碩士<br>國立屏東科技大學<br>車輛工程系所<br>105<br>In this study, the temperature of solid/fluid inside a continuously variable transmission (CVT) of a 400 cc scooter is investigated numerically utilizing ANSYS FLUENT. The moving reference frame(MRF)techniquewith conjugate heat transfer between gases and solid rotation/translationare implemented to carry out the simulation.The emphasis of the present study is put on the effects of CVT housing configuration, belt’s thermal conductivity,belt’s speed ratio and the heat dissipated from the crankcase on the thermal-flow-field of CVT. The numericalresults show that

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44

Chen, Jun-Hong, and 陳俊宏. "Design and Fabrication of an Impulse Type Continuously Variable Transmission." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/9hbr43.

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碩士<br>國立虎尾科技大學<br>機械與機電工程研究所<br>100<br>The purpose of this study proposed a new type of continuously variable transmission mechanism including kinematic analysis, kinetostatic analysis, and prototype fabrication. First, we collected the continuous variable transmission mechanisms literature and patents to analyses the basic operation principle and generalized a conclusion to create a new design of a coaxial impulse Type continuously variable transmission. This transmission is possessed a three-link and one degree of freedom. Then, according to the new concept, a 3D solid modeling was drawn

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"Effect of Continuously Variable Unit on Powertrain Dynamics." University of Technology, Sydney. Faculty of Engineering, 2004. http://hdl.handle.net/2100/340.

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This thesis studies the dynamic model and simulation of a Half-Toroidal (HT) type Continuously Variable Unit (CVU) integrated into a conventional powertrain. A simplified parametric model of a HT-CVU is constructed using Finite Element Method (FEM) in which the continuous variable speed unit is discretized into lumped masses, spring and damper elements. Linearized Finite Elements (FE) have been used to model the contacts between the toroids and rollers. The phenomenon of slip and spin associated with the rolling-slipping contacts of the traction drives are modelled kinematically. All Finite E

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Tsung, Chung-Hsien, and 鐘顯宗. "PID Controller Design for Continuously Variable Transmission Systems for Wind Turbine." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/60295159932838888793.

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碩士<br>崑山科技大學<br>機械工程研究所<br>105<br>Climate change brought about the threat to humanity and the earth, due to which countries began to focus on environmental protection and energy conservation to reduce to dependency on fossil fuel. At present, focus has been centered on development of renewable energy, such as solar energy, the wind, tidal energy and geothermal energy. One of most used and researched field is wind energy and usage of wind turbines. 　At present, most of the transmission systems of wind turbines are based on Planetary Gear Box (PGBs). In this paper, we mainly study the use of El

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47

Wu, Shing-Ming, and 吳詩銘. "The Development of Rotational Speed Control System of Continuously Variable Transmission." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/39217821534204689994.

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碩士<br>大同大學<br>機械工程學系(所)<br>101<br>This research focuses on the control of Continuously Variable Transmission (CVT) system of Scooter type motorcycle, and the goal is to achieve stable start and acceleration control of CVT system.In this research, the stable output of CVT is achieved by the feedback control of engine revolution with microcontroller (PIC18F4520). Moreover, PIC18F4520 is applied as the core of three major sections as follows: the manufacturing of electronic throttle; the feedback and control of engine revolution; the evaluated power and control of CVT system.The result of this re

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48

Yang, Chin-Cheng, and 楊金晟. "Study of Planetary Gears type-Continuously Variable Transmission System for Vehicle." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/yytdx3.

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碩士<br>國立臺北科技大學<br>車輛工程系所<br>96<br>The Continuously Variable Transmission system is always the vehicles research and development goal, many vehicle manufactories unceasing to improve and invest new design to save energy, reduce environmental pollution and promotion comfortableness. The currently applied the broadest Continuously Variable Transmission system was still by the belt type or steel-belt type, but it’s unable to use in larger power vehicles. In this study, by using gear meshing has the high efficiency characteristic, so selects the planetary gear, and two degrees of freedom characteri

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49

Huang, Jiun-Wei, and 黃俊瑋. "Experimental platform of Active Continuously Variable Transmission System Design and Study." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/tmf2m7.

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碩士<br>國立臺北科技大學<br>車輛工程系所<br>97<br>The development of Continuously Variable Transmission system has been the mainly focused on the vehicles transmission system in recent years, leading to intensive research into this topic in many vehicle manufacturers and academic arena. The Continuously Variable Transmission systems currently used in general purpose vehicles mostly employ sensors to transmit data of key operational parameters, such as vehicle speed and throttle position for determining system’s hydraulic pressures and gear reduction ratios, thereby changing the speed of the vehicle. The drawb

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CHEN, HONG-ZHANG, and 陳竑璋. "Development of the Continuously Variable Transmission Stationary Bike with Magnetic Resistance." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/37zuv7.

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碩士<br>南臺科技大學<br>機械工程系<br>106<br>The purpose of this study is to design a“Continuously Variable Transmission Stationary Bike with Magnetic Resistance”. The target group is mainly for the elderly, and set that in the community park. Using the fitness equipment set nearby home, that is to effectively make the muscles and bones of the human body achieve the purpose of exercise, so that the skeletal muscle and bone density of the human body are not gradually reduced due to aging. The CVT system is adopted, because it has an infinite speed ratio, and can be based on the user. The resistance part is

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