Relevant bibliographies by topics / Continuously variable transmission (CVT)

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Continuously variable transmission (CVT)'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 September 2023

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Journal articles on the topic "Continuously variable transmission (CVT)"

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Dilip Challirwar, Tanvi. "Continuously Variable Transmission (CVT)." International Journal of Engineering Trends and Technology 67, no. 3 (March 25, 2019): 62–65. http://dx.doi.org/10.14445/22315381/ijett-v67i3p211.

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Ivanov, Konstantin Samson. "Creation of Adaptive-Mechanical Continuously Variable Transmission." Applied Mechanics and Materials 436 (October 2013): 63–70. http://dx.doi.org/10.4028/www.scientific.net/amm.436.63.

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Recently there were patents on not switched gear continuously variable transmission (CVT) without hydro transformer. In transmission wheelwork with two degrees of freedom and one entrance is used. Adaptive mechanism of CVT provides possibility of output link movement with speed inversely to resistance force at constant input power. However the theoretical description of such transmissions is not convincing enough. Obviously at the basis of creation of adaptive transfers with two degrees of freedom essentially new regularity of mechanics lies. Purpose of present work is to formulate regularities of the mechanics allowing creating the adaptive-mechanical continuously variable transmission. The using of the found regularities will allow creating transmissions with mechanical adaptation to variable technological loading.
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Xue, Yuan, Zhen Gou, He Yin, and Xiao Fu Zhang. "Energy Model of Pulse Continuously Variable Transmission." Applied Mechanics and Materials 835 (May 2016): 654–60. http://dx.doi.org/10.4028/www.scientific.net/amm.835.654.

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The low efficiency restricts the development of pulse continuously variable transmission (P-CVT) mainly, so it is an urgent task to reveal the physical essence of P-CVT, find out the main factor of energy loss, optimize the structure and improve the efficiency. In this paper for this problem, the energy model is established, proposing the calculation method of the energy loss in kinematic pair, the energy loss caused by the resistance of lubrication and the energy loss caused by the damping of the materials of transmission machine. And on this basis, the energy loss will be analyzed specifically by taking the Y2 P-CVT for example, pointing out the corresponding measures which can improve the efficiency. Finally, the physical essence of P-CVT is revealed. Therefore, this paper can provide theory for the efficiency analysis and optimal design of P-CVT.
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Amoozandeh Nobaveh, Ali, Just L. Herder, and Giuseppe Radaelli. "A compliant Continuously Variable Transmission (CVT)." Mechanism and Machine Theory 184 (June 2023): 105281. http://dx.doi.org/10.1016/j.mechmachtheory.2023.105281.

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Goszczak, Jarosław, Bartosz Radzymiński, and Grzegorz Mitukiewicz. "Continuously variable transmission leakage test results." Acta Innovations, no. 31 (April 1, 2019): 5–13. http://dx.doi.org/10.32933/actainnovations.31.1.

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After a short introduction characterizing the general outline of the issue, this paper describes the test results of oil leakage measurements through CVT actuator seals. The research was done using Jatco company's CVT 7 model, the popular gearbox for small passenger cars. Several curves of leakage values are given for both actuators, concerning different conditions such as rotational speed, oil temperature or pressure. In the summary several conclusions are formulated, based on presented test results. The determined maximal value of leakage is about 1 l/min. It emerged that the influence of centrifugal force is negligible. What is more, the observed phenomena are shortly described and projected for more detailed investigation.
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Goszczak, Jarosław, and Bartosz Radzymiński. "Continuously Variable Transmissions - outline." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 6 (June 30, 2018): 447–51. http://dx.doi.org/10.24136/atest.2018.110.

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Paper concerned the Continuously Variable Transmission (CVT). The comparison of the engine’s work conditions with conventional manual transmission and CVT’s is presented. Also, a short historical track is included. Furthermore, a production data with the forecast is presented for different parts of the World. Various current solutions of continuous ratio change are mentioned with the more detailed description of the most popular design used in passenger cars. Technological challenges and possibilities of further transmission improvement are included.
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Tawi, Kamarul Baharin, Izhari Izmi Mazali, Bambang Supriyo, Nurulakmar Abu Husain, Mohd Salman Che Kob, and Yusrina Zainal Abidin. "Pulleys' Axial Movement Mechanism for Electro-Mechanical Continuously Variable Transmission." Applied Mechanics and Materials 663 (October 2014): 185–92. http://dx.doi.org/10.4028/www.scientific.net/amm.663.185.

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Pulley-based continuously variable transmission (CVT) with Metal Pushing V-belt (V-belt) is a type of automotive transmission that is widely applied currently by many car manufacturers worldwide. Unlike the conventional automotive transmissions, in a pulley-based CVT with V-belt, the transmission ratio (CVT ratio) is changed continuously without the use of discrete gears. Instead, the CVT ratio is varied through the simultaneous axial movement of the primary pulley and the secondary pulley. By axially moving both pulleys simultaneously, the radius of the V-belt on both pulleys will be changed accordingly, resulting in the change of the CVT ratio. The existing pulley-based CVTs in the market use electro-hydro-mechanical (EHM) actuation system to change and to maintain the desired CVT ratio through the hydraulic pressure. However, the application of EHM actuation system leads to some disadvantages, particularly in term of the high power consumption from the engine needed to maintain the desired CVT ratio. This reduces the efficiency of the powertrain system, which eventually increases the fuel consumption of the vehicles. In addition to that, the existing pulley-based CVTs also use single acting pulley mechanism to axially move the pulleys for changing the CVT ratio. Therefore, the issue of V-belt's misalignment, which shortens the lifespan of the V-belt, is inevitable here. In this paper, the pulleys' axial movement mechanism that uses electro-mechanical (EM) actuation system is proposed. Consequently, the working principle of the proposal is described and its potential benefits are discussed.
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Albers, A., A. Stuffer, and J. Bernhardt. "Continuously variable transmission (CVT) with ceramic components." Materialwissenschaft und Werkstofftechnik 36, no. 3-4 (March 2005): 96–101. http://dx.doi.org/10.1002/mawe.200500868.

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Mantriota, G. "Power split continuously variable transmission systems with high efficiency." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 215, no. 3 (March 1, 2001): 357–58. http://dx.doi.org/10.1243/0954407011525692.

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Continuously variable transmissions (CVTs) have developed notably in different applications over the past years. This is especially true in the automobile field because of advantages in terms of car handling and efficiency on urban roads. In this work an original functional solution of a power split CVT system is described. The proposed solution allows the generation of a power flow without recirculation. Kinetic characteristics of single-component devices are obtained and the power split CVT system's efficiency is determined by considering how the efficiency of the component devices changes as a function of operating conditions. The advantages for the power split CVT system are therefore shown in terms of power and efficiency in comparison with the single CVT.
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Tanaka, H., and H. Machida. "Half-Toroidal Traction-Drive Continuously Variable Power Transmission." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 210, no. 3 (September 1996): 205–12. http://dx.doi.org/10.1243/pime_proc_1996_210_500_02.

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A continuously variable power transmission (CVT) has a potential to present comfortable cruising, powerful acceleration, fuel economy and improvement of exhaust-gas emission as an automotive power transmission. There have been many developments of the half-toroidal traction-drive CVT since 1980 and ceaseless improvements on the traction material, synthetic fluid and efficiency continue to be made. This paper discusses some fundamental issues such as the influence of spin on the temperature rise of the traction surface, stress-cycle endurance of the traction element and heat transfer of the power roller, and shows the efficiency curve of the latest double-cavity CVT with a nominal input-torque capacity of 340 N m and rotational speed of 7000 r/min working at the maximum Hertzian pressure of 3.2 GPa.
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Dissertations / Theses on the topic "Continuously variable transmission (CVT)"

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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 method for CVT tuning. Previous approaches to CVT tuning were strictly empirical and involved mechanical component replacement in a slow and expensive trialand- error optimization loop. The tuning software is intended to be a first step in the process of properly tuning a CVT for a specific application and not a complete replacement for the empirical methods employed previously.
Master of Science
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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 tribological prospective. A specially designed optimisation algorithm has been created that is capable of quickly improving each critical component dimension in parallel to fulfil multiple objectives. This algorithm can be easily adapted for alternative applications and objectives. The validity of the optimised design is demonstrated through a simulation-tool that has been created in order to model the behaviour of the CVT in a real automotive environment using multiple fundamental theories and models including tire friction and traction behaviour. This powerful simulation tool is capable of predicting transmission and vehicular behaviour, and demonstrates a very good correlation with real-world data. A design critique is then performed that assesses the current state of the CVT design, and looks to address some of the concerns that have been found through the various methods used. A specific prototype design is also presented, based on the optimisation techniques developed, although the actual creation of a prototype is not presented here. Additional complementary research looks at the accuracy of the tire friction models through the use of a specially design tire friction test rig. Furthermore, a monitoring system is proposed for this particular CVT design (and similar) that is capable of continuously checking the contact film thickness between adjacent elements to ensure that there is sufficient lubricant to avoid metal-on-metal contact. The system, which is based around capacitance, requires the knowledge of the behaviour of the lubricant’s permittivity at increased pressure. This behaviour is studied through the use of a specially-designed experimental test rig.
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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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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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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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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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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 advantages, it has some big drawbacks like low efficiency, torque transmission ability and limited speed range. With developing technology, however, new solutions are developed to eliminate these drawbacks. In this study simulation models for the performance and fuel consumption of different types and arrangements of continuously variable transmission (CVT) systems are developed. Vehicles, which are equipped with two different arrangements of CVT and an automatic transmission, are modelled by using Matlab&
#8217
s simulation toolbox Simulink. By defining the required operating points for better acceleration performance and fuel consumption, and operating the engine at these points, performance optimization is satisfied. These transmissions are compared with each other according to their &
#8216
0-100 kph&
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acceleration performances, maximum speeds, required time to travel 1000 m. and fuel consumptions for European driving cycles ECE and EUDC. These comparisons show that CVT systems are superior to automatic transmission, according to their acceleration and fuel consumption performances. CVTs also provide smoother driving, while they can eliminate jerks at gear shifting points.
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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 continue to focus on better fuel efficient and decreased pollution producing vehicles, but also decrease the cost of these vehicles to make them more available and enticing to the general public. Results from this research include one potential solution to reduce the cost of electric and hybrid-electric vehicles. Previous research performed in this area has led to the investigation and bench-top testing of a special type of mechanical system known as a Planetary Differential (PD). An exploration of the functionality of this system has shown that the PD can simplify expensive and complex electronic control systems for electric and hybrid-electric vehicles, thus reducing the cost to the consumer. In this study, fundamental speed, torque and power relationships for the PD were developed and tested under various loading conditions. Advantages and disadvantages of the PD, as compared to other similar mechanical systems, are identified and outlined. Recommendations for future work and implementation of the PD in electric and/or hybrid-electric vehicles are presented herein.
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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 limited amount of studies on the CVT implementation on wind turbines. Therefore, this study has also an assertion on being a useful mechanical analyse on that topic. After observing several different types of possibly suitable CVT systems for wind turbines; a blade element momentum code is written in order to calculate the torque, rotational speed and power production values of a wind turbine by using aerodynamic blade properties. Following to this, a dynamic model is created by using the values founded by the help of the blade element momentum theory code, for the wind turbine drive train both including and excluding the CVT system. Comparison of these two dynamic models is done, and possible advantages and disadvantages of using CVT systems for wind turbines are highlighted. The wind speed values, which are simulated according to measured wind speed data, are used in order to create the dynamic models, and Matlab is chosen as the software environment for modelling and calculation processes. Promising results are taken out of the simulations for both in terms of energy efficiency and frequency control. The wind turbine model, which is using the CVT system, is observed to have slightly higher energy production and more importantly, no need for power electronics for frequency control. As an outcome of this study, it is possible to say that the CVT system is a candidate of being a research topic for future developments of the wind turbine technology.
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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
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 entrada em relação ao de saída, sendo então que o modelo terá de incluir as características de saída do motor, binário (torque) e rotação e todos os elementos utilizados numa transmissão CVT, cujo objectivo inicial é chegar a um modelo matemático para determinar o rendimento funcional. Ter-se-á de então proceder a uma análise do comportamento dinâmico da transmissão, para tal apresentando-se equações de funcionamento que representam o comportamento dinâmico dos vários componentes do sistema de transmissão através de uma simulação no programa comercial Matlab para obtenção dos resultados.
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Books on the topic "Continuously variable transmission (CVT)"

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Maten, John R., and Bruce D. Anderson. Continuously Variable Transmission (CVT). Warrendale, PA: SAE International, 2006. http://dx.doi.org/10.4271/pt-125.

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John, Maten, Anderson Bruce, and Society of Automotive Engineers, eds. Continuously variable transmission (CVT). Warrendale, Pa: SAE, 2006.

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International Conference on Continuously Variable Power Transmissions (1996 Yokohama). CVT '96, Yokohama: Proceedings of the International Conference on Continuously Variable Power Transmissions. Tokyo: Society of Automotive Engineers of Japan, 1996.

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SAE Passenger Car Activity (Organization). Transmission and Driveline Committee. and Society of Automotive Engineers. Farm, Construction, and Industry Machinery Activity. Transmission and Driveline Committee., eds. Continuously variable transmissions for passenger vehicles: (selected papers through 1986). Warrendale, PA: Society of Automotive Engineers, 1987.

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C, Gallo, and United States. National Aeronautics and Space Administration., eds. Design and dynamic simulation of a fixed pitch 56 kW wind turbine drive train with a continuously variable transmission. [Washington, DC: National Aeronautics and Space Administration, 1986.

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Continuously variable transmission (CVT). Warrendale, PA: Society of Automative Engineers, 2006.

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Anderson, Bruce D., and John R. Maten. Continuously Variable Transmission (CVT). SAE International, 2006.

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Continuously Variable Transmission. SAE International, 2006.

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Design and dynamic simulation of a fixed pitch 56 kW wind turbine drive train with a continuously variable transmission. [Washington, DC: National Aeronautics and Space Administration, 1986.

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Book chapters on the topic "Continuously variable transmission (CVT)"

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Ivanov, K. S. "Synthesis of Toothed Continuously Variable Transmission (CVT)." In Mechanisms, Transmissions and Applications, 265–72. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2727-4_24.

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Ivanov, K., and B. Tultaev. "Toothed Continuously Variable Transmission (CVT) – Industrial Realization." In New Trends in Mechanism and Machine Science, 329–35. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4902-3_35.

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Agrawal, Ajay. "Review on Continuous Variable Transmission (CVT)." In International Conference on Intelligent Emerging Methods of Artificial Intelligence & Cloud Computing, 494–502. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92905-3_61.

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Okubo, Nobuyuki, Hiroki Aikawa, and Takeshi Toi. "Noise Reduction of Continuously Variable Transmission (CVT) for Automobile." In Structural Dynamics, Volume 3, 763–70. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9834-7_66.

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Berge, Ewan M., and A. Pramanik. "Analysis and Material Selection of a Continuously Variable Transmission (CVT) for a Bicycle Drivetrain." In Introduction to Mechanical Engineering, 43–81. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78488-5_2.

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Nuri, Nur Rashid Mat, Khisbullah Hudha, and Muhammad Luqman Hakim Abd Rahman. "Experimental of CVT Ratio Control Using Single Actuator Double Acting Electro-mechanical Continuously Variable Transmission." In Lecture Notes in Electrical Engineering, 659–68. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4597-3_59.

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Chen, Yong. "Continuously Variable Transmission." In Springer Tracts in Mechanical Engineering, 109–53. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6703-2_4.

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Ivanov, K. S., A. D. Dinassylov, and E. K. Yaroslavceva. "Adaptive Mechanical Continuously Variable Transmission." In New Advances in Mechanisms, Transmissions and Applications, 83–90. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7485-8_11.

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Mobedi, Emir, and Mehmet İsmet Can Dede. "A Continuously Variable Transmission System Designed for Human–Robot Interfaces." In Lecture Notes in Mechanical Engineering, 29–41. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4477-4_3.

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Mehta, Prathamesh, Rishit Gandhi, Sadique Selia, Yash Thakkar, Ramesh Rajguru, and Hari Vasudevan. "Operational Logic for Electronic Continuously Variable Transmission Using PID Control." In Proceedings of International Conference on Intelligent Manufacturing and Automation, 341–49. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7971-2_33.

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Conference papers on the topic "Continuously variable transmission (CVT)"

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Kwak, Yungwan, and Christopher Cleveland. "Continuously Variable Transmission (CVT) Fuel Economy." In International Powertrains, Fuels & Lubricants Meeting. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2017. http://dx.doi.org/10.4271/2017-01-2355.

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Boos, Manfred, and Herbert Mozer. "ECOTRONIC - The Continuously Variable ZF Transmission (CVT)." In SAE International Congress and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1997. http://dx.doi.org/10.4271/970685.

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Nkama, Nkama E., Fisseha M. Alemayehu, Haileyesus B. Endeshaw, Stephen Ekwaro-Osire, and Duc Pham. "Probabilistic Analysis of Continuously Variable Transmission to Increase Reliability." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52803.

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Renewable energy has surfaced as a power source of interest of the world recently. Wind Energy has been the leading source of renewable energy development for the past several years. The biggest issue with wind energy are wind turbine (WT) drivetrain failures. The gearbox fails after three to seven years of operation while the expected lifetime of the WT is 20 years. The application to the automotive industry inspired the use of continuously variable transmissions (CVT) in a WT. The CVT considered in this study is the Nu-Vinci CVT technology, a Continuously Variable Planetary (CVP) transmission, designed by Fallbrook Technologies. This technology was selected because of its planetary configuration and its ability to transmit larger amounts of torque, which is required for WT applications. The goal of this research was to reduce the Cost of Energy (COE) by increasing the reliability of CVTs in WTs. In this study, two WT systems, one with CVT as the third stage (referred as ‘WT with CVT’) and another with three stage standard gearbox (referred as ‘WT with SG’), are considered. The research question in this study is ‘Does the use of CVTs improve the reliability of drivetrains of WTs?’ To answer this question three specific aims were developed. First, a computational framework had to be developed. Second, a probabilistic dynamic analysis was conducted. Third, a probabilistic analysis on the COE was performed. A computational framework was developed to guide the probabilistic analysis to determine power values and COE. The probability that the generator torque of the WT with CVT will be less than that of the WT with SG is found to be 50.67%. It was also shown that provided the same input speed and torque, the WT with CVT has a slightly higher power generation. In addition, it was shown that there is 54% probability that the WT with CVT will exhibit lower COE than WT with SG. The higher power production is attained while decreasing the COE. From these results, it can be inferred that the reliability of the drivetrain is improved using a CVT.
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Capehart, Twan, and Carl A. Moore. "Variable Stiffness Mechanisms Using Spherical Continuously Variable Transmissions." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51828.

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Some robot developers are considering elasticity to provide compliance for better adaption to a changing environment, shock resistance and safer human-robotic interactions (HRI). In this study we simulate a spherical continuously variable transmission (CVT) to validate its ability as the primary mechanism in a variable stiffness device for a 1D robotic hopper. The spherical CVT has been used in many robotic applications including cobots by Peshkin et al. [1] and as the driving unit in the load sensitive mechanism by Tadakuma et al. [2]. A CVT based variable stiffness/damping device intended for vibration mitigation was presented by Little [3]. That paper presented the kinematics and experiments of the CVT based variable stiffness/damping device for the specific application of vibration mitigation. This study considers the dynamics of the CVT based variable stiffness/damping device and modifies the device based on previous studies. We use ADAMS to simulate the modified system because it captures many of the real world dynamics arising from the CVT’s rolling friction dynamics. Finally we present a conceptual design of the variable stiffness CVT and briefly discuss its use in a 1D legged hopper application.
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Bonsen, B., T. W. G. L. Klaassen, K. G. O. van de Meerakker, M. Steinbuch, and P. A. Veenhuizen. "Analysis of Slip in a Continuously Variable Transmission." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41360.

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High clamping force levels reduce the efficiency of the Continuously Variable Transmission (CVT). However, high clamping force level are necessary to prevent slip between the belt and the pulleys. If a small amount of slip is allowed, the clamping force level can be reduced. To achieve this, slip in a CVT is investigated. From measurements on an experimental setup, Traction curve data and efficiency measurements are derived. A model describing slip in a CVT is verified using measurements with a belt with increased play. It is found that small amounts of slip can be controlled in a stable way on the setup. The traction curve was mostly dependent on the CVT ratio. Efficiency is found to be highest for 1 to 2% slip depending on the ratio. The model is in reasonable agreement with the measurements.
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Glovnea, Romeo P., and Ovidiu S. Cretu. "Double-Cage Constant Power Continuously Variable Transmission (CP-CVT)." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95212.

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The paper focuses on the internal construction of an original Constant Power Continuously Variable Transmission (CP-CVT). In a recent publication the authors have introduced the fundamentals of the kinematics and dynamics of the CP-CVT. The present study focuses on the optimisation of the CP-CVT’s internal geometry and the size of its active elements in order to obtain maximum power transmitted with least variation over a range of transmission ratio. The paper concludes that for a specific geometry the CP-CVT presented offers promising characteristics that recommend it as a good candidate in the race of developing a new generation of the automobiles’ powertrain.
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Modak, Girish S., and S. S. Sane. "Mechanical Continuously Variable Transmission (CVT) for Parallel Hybrid vehicle." In 2006 IEEE Conference on Electric and Hybrid Vehicles. IEEE, 2006. http://dx.doi.org/10.1109/icehv.2006.352281.

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Kim, Songho, Michael Peshkin, and J. Edward Colgate. "Causes of Slip in a Continuously Variable Transmission." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43797.

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Rotational CVTs (continuously varible transmissions) constrain the velocities of two rotational joints to a computer-controlled ratio. CVTs traction drive mechanisms that rely on the support of traction forces across rolling contracts. When called upon to transmit loads, CVTs produce a velocity ratio that departs from the ideal transmission ratio. This paper reports on the results of our analysis in pursuit of understanding the mechanics of the rotational CVT. We present the measured velocity ratios in the face of lateral loads at various transmission settings. In addition, wer present our model that closely fits the empirical data.
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Dong, Jian, Zuomin Dong, and Curran Crawford. "Review of Continuously Variable Transmission Powertrain System for Hybrid Electric Vehicles." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63321.

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In this paper, a review of the state-of-the-art of various CVT powertrain systems now used or being planned for future use in HEVs is presented. These CVT powertrain systems are classified into three main categories: mechanical CVT, electromechanical CVT (ECVT) and pure electrical CVT (EVT). The research development, system architecture, operation characteristics and the merits and drawbacks of each type are discussed.
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Rossi, Claudio, Piero Corbelli, and Gabriele Grandi. "W-CVT continuously variable transmission for wind energy conversion system." In 2009 IEEE Power Electronics and Machines in Wind Applications (PENWA). IEEE, 2009. http://dx.doi.org/10.1109/pemwa.2009.5208399.

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Reports on the topic "Continuously variable transmission (CVT)"

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Vaishya, Abhishek Lakhanlal, and Sachin Phadnis. Experimental Investigations of Forced Air Cooling for Continuously Variable Transmission (CVT). Warrendale, PA: SAE International, October 2013. http://dx.doi.org/10.4271/2013-32-9073.

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Park, Munu, and Nohgill Park. Development of New Continuously Variable Transmission for Electric Bicycles. Warrendale, PA: SAE International, October 2005. http://dx.doi.org/10.4271/2005-32-0037.

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Kaneko, Yutaka, Kazutaka Adachi, Kimio Kanai, and Yoshimasa Ochi. Design of a Gear Ratio Servo Control System for Toroidal Continuously Variable Transmission. Warrendale, PA: SAE International, May 2005. http://dx.doi.org/10.4271/2005-08-0040.

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Blagonravov, A. A. Mechanical continuously variable transmission with oscillatory movement of internal links and adjustable power functions. Ljournal, 2019. http://dx.doi.org/10.18411/b100-22011-t20181205.

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Blagonravov, A. A. Mechanical continuously variable transmission with oscillatory movement of internal links and adjustable power functions. Ljournal, 2019. http://dx.doi.org/10.18411/b10022011t20181205.

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Cotrell, J. Motion Technologies CRADA CRD-03-130: Assessing the Potential of a Mechanical Continuously Variable Transmission. Office of Scientific and Technical Information (OSTI), September 2004. http://dx.doi.org/10.2172/15009604.

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Gallo, C., R. Kasuba, A. Pintz, and J. Spring. Design and dynamic simulation of a fixed pitch 56 kW wind turbine drive train with a continuously variable transmission. Office of Scientific and Technical Information (OSTI), March 1986. http://dx.doi.org/10.2172/6684402.

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Gangadurai, Mohan, B. Sreekumar, and Harikrishnan Nagarajan. Development of control strategy for optimal control of a continuously variable transmission operating in combination with a throttle controlled engine. Warrendale, PA: SAE International, October 2005. http://dx.doi.org/10.4271/2005-32-0007.

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