Relevant bibliographies by topics / V-belts drive system

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

Academic literature on the topic 'V-belts drive system'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "V-belts drive system"

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SZCZYPIŃSKI-SALA, Wojciech, Krzysztof DOBAJ, and Adam KOT. "FRICTIONAL PROBLEMS IN CONTINUOUSLY VARIABLE TRANSMISSION BELT DRIVES." Tribologia, no. 5 (October 31, 2017): 93–100. http://dx.doi.org/10.5604/01.3001.0010.5923.

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The article describes the results of the research carried out on the evaluation of the influence of friction pairs (rubber belt – belt pulley in belt drive) on the ability to transmit power. In order to determine the characteristics of the belt drive operation, measurements were made on a real belt drive from the drive train of a light two-wheeled vehicle. The measurement was carried out in conditions of changes in the dynamic load. The measurements of the belt slip on the belt pulley within the whole range of the changes of gear ratios and angular speed of the engine were made. During the tests, belts made from various rubber mixtures were compared. The values of the friction coefficients between the surface of belts and the belt pulley were measured. Model analyses of the impact of belt slip on the wheel related to the temperature of Belt drive elements were also made. Generally, one can ascertain that, in belt drive systems, power losses are a combination of speed losses and torque losses. The increase in the efficiency of belt drives is possible by decreasing power losses. It is possible to obtain the high performance of continuously variable transmission belt drives with a V- belt solely with the proper choice of the design parameters, which is possible only after the exact recognition of the operational characteristics unique to this class of belt drive systems.
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Carbone, G., L. Mangialardi, and G. Mantriota. "Theoretical Model of Metal V-Belt Drives During Rapid Ratio Changing." Journal of Mechanical Design 123, no. 1 (March 1, 1999): 111–17. http://dx.doi.org/10.1115/1.1345521.

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Today the use of metal V-belt (MVB) on C.V.T. (continuously variable transmission) based systems is the rule in automotive applications. The great advantage of this kind of belt is the capability to resist the moving half-pulley’s high axial thrust necessary to transmit the large torque involved. This paper suggest a theoretical model of belt’s behavior during rapid ratio speed changes with the aim to represent the dynamical response of the system during the transient condition. The paper proposes a relation which correlates some easily measurable macroscopic quantities: axial thrust, torque transmitted and belt’s tensions on the slack and tight side. The metal V-belt consists of wedge-shaped plates that are supported by a flexible band, of which there are two types: the metal V-belt without clearance and the metal V-belt with clearance between plates. Our investigation is carried out for the first type of belt and under the hypothesis that there is a rapid variation of speed ratio. The result, that has been reached, allows to predict the behavior of the system and simplifies the planning of continuously variable transmission with metal V-belt.
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Kong, Lingyuan, and Robert G. Parker. "Mechanics and Sliding Friction in Belt Drives With Pulley Grooves." Journal of Mechanical Design 128, no. 2 (June 23, 2005): 494–502. http://dx.doi.org/10.1115/1.2168469.

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The steady mechanics of a two-pulley belt drive system are examined where the pulley grooves, belt extension and wedging in the grooves, and the associated friction are considered. The belt is modeled as an axially moving string with the tangential and normal accelerations incorporated. The pulley grooves generate two-dimensional radial and tangential friction forces whose undetermined direction depends on the relative speed between belt and pulley along the contact arc. Different from single-pulley analyses, the entry and exit points between the belt spans and pulleys must be determined in the analysis due to the belt radial penetration into the pulley grooves and the coupling of the driver and driven pulley solutions. A new computational technique is developed to find the steady mechanics of a V-belt drive. This allows system analysis, such as speed/torque loss and maximum tension ratio. The governing boundary value problem (BVP) with undetermined boundaries is converted to a fixed boundary form solvable by a general-purpose BVP solver. Compared to flat belt drives or models that neglect radial friction, significant differences in the steady belt-pulley mechanics arise in terms of belt radial penetration, free span contact points, tension, friction, and speed variations.
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Ding, Guo Liang, Yi Guo, and Zhi Qiang Li. "Design and 3D Modeling System Development of a Classical V-Belt Drive." Advanced Materials Research 971-973 (June 2014): 428–31. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.428.

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to realize computer-aided design and 3D modeling of the classical V-belt drive, a classical V-belt drive design and 3D modeling system was developed with the SolidWorks platform and using Visual Basic language. This system is composed of the design subsystem and the 3D modeling subsystem, which enabled the classical V-belt design process to be automatic and the fast 3D modeling of parts and assemblies. The application of design and 3D modeling for the classical V-belt drive system on the pot-seedling hole-forming machine has shown that this system can ensure accurate design results and shorten the design period.
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Sheng, Gang, Les Brown, Keming Liu, Jerzy Otremba, Jian Pang, Mohamad S. Qatu, and Rao V. Dukkipati. "Chirp, squeal and dynamic instability of misaligned V-ribbed belts in automotive accessory belt drive systems." International Journal of Vehicle Noise and Vibration 3, no. 1 (2007): 88. http://dx.doi.org/10.1504/ijvnv.2007.014399.

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Tonoli, Andrea, Nicola Amati, and Enrico Zenerino. "Dynamic Modeling of Belt Drive Systems: Effects of the Shear Deformations." Journal of Vibration and Acoustics 128, no. 5 (February 3, 2006): 555–67. http://dx.doi.org/10.1115/1.2202153.

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Multiribbed serpentine belt drive systems are widely adopted in accessory drive automotive applications due to the better performances relative to the flat or V-belt drives. Nevertheless, they can generate unwanted noise and vibration which may affect the correct functionality and the fatigue life of the belt and of the other components of the transmission. The aim of the paper is to analyze the effect of the shear deflection in the rubber layer between the pulley and the belt fibers on the rotational dynamic behavior of the transmission. To this end the Firbank’s model has been extended to cover the case of small amplitude vibrations about mean rotational speeds. The model evidences that the shear deflection can be accounted for by an elastic term reacting to the torsional oscillations in series with a viscous term that dominates at constant speed. In addition, the axial deformation of the belt spans are taken into account. The numerical model has been validated by the comparison with the experimental results obtained on an accessory drive transmission including two pulleys and an automatic tensioner. The results show that the first rotational modes of the system are dominated by the shear deflection of the belt.
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Mohammad Munib Rosadi, Retno Eka Pramitasari, and Ali Hasbi Ramadani. "PERANCANGAN SISTEM PENGGERAK TRAINER TRANSMISI MANUAL 5 PERCEPATAN TOYOTA KIJANG." Reaktom : Rekayasa Keteknikan dan Optimasi 4, no. 2 (December 15, 2019): 81–84. http://dx.doi.org/10.33752/reaktom.v4i2.1252.

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The need for learning media in the Machine Element II course makes the transmission trainer to be immediately presented in order to become a means of supporting student learning. In a transmission trainer system a driving mechanism is needed so that the transmission can rotate. The drive mechanism must be reliable to ensure the transmission can rotate without constraints. Therefore, it is necessary to design and calculate in designing the transmission driving mechanism. The purpose of this study was to determine the design and calculation of the transmission trainer drive system. The design results show that the required motor specs are motors with 250 watts of power, driven pulley diameter 50 mm, driven pulley diameter 250 mm, distance between pulley axes is 335 mm. use v-belt type A with a length of 1175 mm. this drive system mechanism will produce a final torque of 393.01 kg.mm which is considered good because it is higher than the planned torque that is 325,85 kg.mm.
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Fenina, S., T. Fakhfakh, and M. Haddar. "Dynamic behaviour of V-belt drive system in the presence of sheaves’ lateral misalignment." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 222, no. 9 (September 1, 2008): 1673–79. http://dx.doi.org/10.1243/09544062jmes861.

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This paper presents the effects of lateral misalignment of sheaves, on the transverse span displacements of a serpentine belt drive system that contains a driving sheave, a driven sheave, a belt, and a dynamic tensioner. This defect gives rise to dangerous operating conditions for the system. A hybrid discrete—continuous model is adopted, in which the coupling between the discrete variables describing the rotational motion of the three sheaves and the tensioner arm and the continuous variables describing the transverse motion of the belt spans is taken into account. An analytical method based on the perturbation method is used to determine the explicit expressions of the transverse span displacements and permits the study of the effects of design variables on the dynamic behaviour of the system in the presence of the defect described earlier.
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Beg, Aiman, and Narendra Jaiswal. "EXPERIMENTAL STUDY AND ANALYSIS OF FLAT BELT CONVEYER SYSTEM USING D.C. MOTOR DRIVE." International Journal of Engineering Technologies and Management Research 5, no. 12 (March 24, 2020): 153–55. http://dx.doi.org/10.29121/ijetmr.v5.i12.2018.337.

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In this paper, we are studying the flat belt conveyor system using of D.C. motor with various speed, in this way we are used the 12 V. D.C. motor, flat belt which having 2mm thickness, speed controller, inlet container and outlet container for the purpose of finding the maximum material handling rate with speed.
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Tran, Ngoc Hai, Cung Le, and Anh Dung Ngo. "An Investigation on Speed Control of a Spindle Cluster Driven by Hydraulic Motor: Application to Metal Cutting Machines." International Journal of Rotating Machinery 2019 (February 19, 2019): 1–17. http://dx.doi.org/10.1155/2019/4359524.

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In this article, we present an experimental study on the speed stability of a spindle driven by a hydraulic motor, which is controlled by a proportional valve, through a V-belt transmission. The research includes the dynamic modeling of the transmission cluster and the transmission from the hydraulic motor to the working shaft via V-belt mechanism, together with the establishment of a mathematical model and fuzzy self-tuning PID controller model. In the model, the V-belt is assumed as an elastic module, and the friction coefficient and mass inertia moment of the hydraulic motor are considered as constant. The Matlab software is used to simulate the speed response of the hydraulic motor to the working shaft. Based on theoretical study, we resemble the experimental system and determine the parameters for the fuzzy self-tuning PID controller. We conduct experiment and investigate the speed stability of the working shaft from 300 to 1100 (rpm) based on transient response parameters such as the time delay, the setting time, the overshoot, and the rotation error at steady state. Thereby, in this study, the simulation and the experiment results are compared and evaluated regarding the speed stability of the working shaft driven by hydraulic motor transmitted through V-belt mechanism. The findings show the speed controllability by using proportional valve to manipulate the oil flow and applying a self-tuning PID controller to achieve very good results such as the error difference of 0.001 to 0.036%, the delay of 0.01 to 0.02 seconds, no overshoot, and the settling error less than 5% compared to the set values. On the other hand, we include the effect of the oil temperature of 40 to 80°C on the working shaft speed (500, 900 rpm) in this study and derive that the system works well at temperature range of 40 to 70°C. On these findings, we propose the applicability of this system on the current machinery cutters. In addition, we verify the effects of the hydraulic drive for main shaft, controlled by fuzzy PID, by comparison of the roughness of the machining work piece with respect to the one using the 3-phase motor drive.
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Dissertations / Theses on the topic "V-belts drive system"

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Fournier, Etienne. "Protocole de diagnostic des entraînements asynchrones par références : application à la détection des déséquilibres mécaniques et des défauts de courroies." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/15546/1/E_Fournier.pdf.

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Les applications entrainées par des moteurs asynchrones consomment à elles seules la majorité de l’énergie électrique utilisée dans le secteur industriel. Des défauts, majoritairement d’origine mécanique, sont susceptibles de se développer au cours du fonctionnement de ces systèmes et rendent nécessaires la mise en place d’une maintenance souvent onéreuse. Afin de réduire ces coûts et d’optimiser la disponibilité des matériels, des méthodes de diagnostic peuvent être développées afin de détecter au plus tôt l’apparition d’un défaut. Cependant, la fiabilité de ces algorithmes et l’automatisation du diagnostic sont complexifiées par la diversité des systèmes alimentés par les variateurs de vitesse industriels ainsi que par le changement de leur point de fonctionnement. Afin de répondre à ces problématiques, un protocole de diagnostic permettant de réaliser une détection sensible et robuste des défaillances mécaniques est développé dans ce travail. Cette méthode consiste à segmenter le plan couple-vitesse du moteur surveillé et à réaliser des références statistiques caractérisant son fonctionnement sain sur chacune des zones de fonctionnement. Des indicateurs de défaut peuvent ensuite être définis statistiquement afin de quantifier l’écart du système vis-à-vis de son comportement sain. Ces indicateurs sont ainsi indépendants du système surveillé et de son point de fonctionnement. Les principales applications ciblées par ce protocole sont les systèmes de compression, de pompage et de ventilation qui représentent une part importante de l’énergie électrique consommée dans le secteur industriel. Le protocole de diagnostic développé dans cette étude est validé expérimentalement dans le cadre de la détection de différentes niveaux de déséquilibre mécanique mais également pour la surveillance d’un système de transmission de type poulies-courroies. De plus, les campagnes expérimentales sont effectuées sur plusieurs systèmes électromécaniques dont les propriétés sont foncièrement différentes afin de valider les performances de normalisation de ce protocole.
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Silva, Carlos Alexandre Ferreira Da. "Modeling and optimization of power losses in poly-V belt transmissions : Application to the Front Engine Accessory Drive of trucks." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI079/document.

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Ces travaux s’inscrivent dans le cadre du projet EDIT(Efficient Distribution Truck, FUI19), piloté par le groupe Volvo Trucks, dont l’objectif de réduction de consommation pour 2020 est fixé à 13% par rapport à un véhicule actuel EURO-6. Le projet EDIT porte sur cinq axes techniques d’amélioration dont un consiste en l’obtention d’un système optimisé de transmission par courroie poly-V au regard des pertes de puissance. Actuellement les faces avant de moteur sont perfectionnées sur le plan mécanique ; cela signifie que la durée de vie de ses composants est optimisée, et que les nuisances vibratoires sont réduites. Par contre, des améliorations peuvent être apportées sur le plan énergétique. Cette thèse, qui a pour objectif d’investiguer les possibilités de réduction et d’optimisation des pertes de puissance sur les façades accessoires, se décline en trois parties : une caractérisation par l’analyse mécanique dynamique des matériaux viscoélastiques des courroies poly-V et des composantes de façade ; une modélisation, une optimisation et une implémentation logicielle des modèles de pertes de puissance ; validées par une dernière partie expérimentale sur banc d’essais. Les pertes de puissances dans une face avant moteur sont de plusieurs types : des pertes internes à la courroie poly-V (hystérésis du caoutchouc), des pertes externes à la courroie (glissement poulie/courroie) et des pertes internes aux composants (frottement dans les roulements). Ces pertes peuvent désormais être quantifiées et optimisées grâce aux modèles développés durant cette thèse. Ces modèles ont été validés et implémentés dans un outil de simulation (PLFead, Power Loss Front engine accessory drive), qui a été développé pour optimiser les pertes de puissance en tenant compte des paramètres de design et de fonctionnement des faces avant moteur
This work is a part of the Efficient Distribution Truck (EDIT, FUI 19) project, led by Volvo Trucks, whose objective is to reduce distribution vehicles’ fuel consumption for 2020 by 13% when compared with the current production vehicle EURO-6. The EDIT project targets five areas of research and technical solutions, one of which consists of obtaining an optimized poly-V belt transmission concerning the power losses. In terms of lifetime of the mechanical components, reduction of noise and vibrations, the Front Engine Accessory Drives (FEADs) are currently one of the most technologically sophisticated systems. However, further improvements can be made to make the vehicles more energy efficient. This thesis, which aims at investigating possibilities for reducing and optimizing the power losses in the FEADs, is composed of three main parts: the characterization of the viscoelastic materials of the poly-V belts via Dynamic Mechanical Analysis (DMA) and the FEAD components; the modeling, the optimization and the implementation of the power loss models in a simulation tool; and their experimental validation through a test bench. The power losses occurring in a FEAD are of several types: poly-V internal losses (hysteresis of the belt-rubber), poly-V external losses (belt/pulley slip) and losses from the accessory drives (friction inside the bearings). These power losses can be quantified and optimized thanks to the models developed throughout this thesis. These models have been validated and implemented in a simulation tool (PLFead, Power Loss Front engine accessory drive), which has been developed to optimize the power losses taking into consideration the design parameters and operating conditions of the FEAD
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Books on the topic "V-belts drive system"

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Ovtov, Vladimir. Machine parts. Course design. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1171976.

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The textbook discusses the methodology of course design of general-purpose drives with a single-stage gearbox (cylindrical, conical and worm) and a V-belt or chain transmission. The procedure for calculating gears and constructing assembly drawings of gearboxes is shown, the development of specifications using the COMPASS-3D computer-aided design system is described. Examples of the design of drawings of the general type of the drive, assembly drawings of gearboxes and working drawings of parts of various types of gearboxes are given. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for independent work of students of engineering specialties studying in the bachelor's degree and specialty.
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Book chapters on the topic "V-belts drive system"

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Pi, Vu Ngoc, Nguyen Khac Tuan, Le Xuan Hung, Nguyen Thi Hong Cam, and Tran Thi Phuong Thao. "Determining Optimum Partial Transmission Ratios of Mechanical Driven Systems Using a V-Belt Drive and a Three-Stage Helical Reducer." In Advances in Material Sciences and Engineering, 81–88. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8297-0_11.

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Cam, Nguyen Thi Hong, Vu Ngoc Pi, Nguyen Khac Tuan, Le Xuan Hung, and Tran Thi Phuong Thao. "Determining Optimal Partial Transmission Ratios of Mechanical Driven Systems Using a V-Belt Drive and a Helical Reducer with Second-Step Double Gear-Sets." In Advances in Engineering Research and Application, 261–69. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04792-4_35.

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Tuan, Nguyen Khac, Tran Thi Phuong Thao, Nguyen Thi Hong Cam, Le Xuan Hung, and Vu Ngoc Pi. "Optimum Calculation of Partial Transmission Ratios of Mechanical Driven Systems Using a V-Belt and a Three-Step Bevel Helical Gearbox." In Advances in Engineering Research and Application, 469–76. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04792-4_61.

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Wirasingha, Sanjaka, Mariam Khan, and Oliver Gross. "48-V Electrification: Belt-Driven Starter Generator Systems." In Advanced Electric Drive Vehicles, 331–68. CRC Press, 2014. http://dx.doi.org/10.1201/b17506-11.

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"48-V Electrication: Belt-Driven Starter Generator Systems." In Advanced Electric Drive Vehicles, 346–83. CRC Press, 2014. http://dx.doi.org/10.1201/9781315215570-14.

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"Introduction of 48 V Belt Drive System." In Solving the Powertrain Puzzle, 480–96. Wiesbaden: Springer Fachmedien Wiesbaden, 2014. http://dx.doi.org/10.1007/978-3-658-06430-3_33.

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Conference papers on the topic "V-belts drive system"

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Balta, Berna, Bülent Balta, Abdülkadir Cengiz, Fazıl Önder Sönmez, and Armağan Arıcı. "Torque Loss Measurements on Poly V-Ribbed Belt Drive Systems." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82245.

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Efficient belts can provide the same magnitude of energy savings as energy-efficient motors. Therefore, belt drives deserve greater attention, so that their losses should be minimized. The belt drive power losses are a combination of torque losses and speed losses. However, the determination of belt drive behavior in terms of power losses requires extensive experimental investigations. Therefore, in this study, belt slip and torque losses were investigated experimentally with a laboratory constructed test bench. Measurement System Analysis (MSA) was performed in order to investigate the test rig reliability. Special attention was paid for experimental test setup, testing and modeling of torque loss behavior of V-ribbed belt drive systems. Significant design parameters were investigated.
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Bronson, Henry D., and Rahuljit Pal. "Human-Hybrid Powered Vehicle (H2PV) Using an Oscillating Drive." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11419.

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For more than a century, bicycle designs have used single chain drive transmissions in the belief that no other option exists. An alternative to a chain driven system is an endless belt transmission system using all three distinct belt forms; flat, V, and toothed. In the described transmission the belt acts as a combination flat and V-belt on the drive pulley, and like a timing belt on the driven pulley. Uniquely, the belt teeth have an asymmetric, pawl like tooth profile. This permits safe operation in conditions when the driven pulley circumference is already moving faster than the drive belt teeth, a common occurrence during bicycle or scooter coasting. The material memory of the elastomeric belt acts to bias the drive to disengagement, yet the belt and drive pulley are light. Combined with carefully positioned back idlers, the mere initiation of a power stroke quickly engages the transmission automatically. One major application described here is a reciprocating drive actuated with natural leg action that is easily augmented with power assistance, producing a Human-Hybrid Powered Vehicle (H2PV). A model demonstrates significant weight reduction versus chain and sprocket drives, along with the elimination of an overrunning clutch or free-wheel, clean and quiet operation, weight efficient design, and use of modern lightweight materials like thermo-plastic plastics, glass, carbon or aramid fibers, and thermo-set plastics (polyurethanes).
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Hong, Shane Y. "A Novel Principle for Automatic Transmission." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34005.

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This paper unveils a new principle for automatic transmission, which may greatly simplify the current automatic transmissions and improve their efficiency. Unlike traditional automatic transmission based on torque converter/planetary gears, automatic transmission systems based on V-belt variable speed drive, or traditional transmission with electrical control, this new approach does not rely on the gear ratio or radii of the driving and driven wheel to change the speed ratio. The speed change in the new approach is achieved by an elastic belt on two fixed-diameter pulleys. The belt elongates in proportion to the load applied, and the driving pulley of fixed diameter has to rotate more to accommodate the increased length of the belt due to the load increase, consequently reduces the speed of driven pulley. This self-sensing, self-adjusting, and fully automatic drive system is pure mechanical without the need of electrical or hydraulic control. Based on this novel kinematic principle, the simplest automatic transmission in the world may be designed, manufactured, and used.
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Song, Guiyong, K. Chandrashekhara, William F. Breig, Darrell L. Klein, and Larry R. Oliver. "Failure Analysis of Serpentine V-ribbed Belt Drive System." In SAE 2004 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-01-0993.

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Saito, Toshihiro. "Dynamics of CVT Metal Pushing V-Belt Co-Simulating With Feedback Control and Finite Element Analysis." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-25185.

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A simulation technology has been developed to predict the transmission efficiency of a metal pushing V-belt and pulleys that make up the drive system of a continuously variable transmission (CVT). When a CVT operates in an actual vehicle, pulley thrust pressure is adjusted by feedback control to maintain a speed ratio. This feedback control has been implemented, for the first time, in an existing simulation that predicts the dynamic behavior of a metal V-belt using explicit structural analysis. The new simulation enables stable control of a target speed ratio when appropriate gains are set for each analysis condition. Using this simulation, the following values can be obtained: 1) pulley thrust pressure that is necessary for maintaining a specified speed ratio but could previously be derived only from physical testing, 2) transmission efficiency of a CVT drive system, consisting of a metal pushing V-belt and pulleys, at each operating condition, and 3) belt friction losses calculated from sliding velocities and friction forces applied to element contact surfaces.
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Saito, Toshihiro. "Simulation Technology of Self-Induced Vibration in a Metal Pushing V-Belt CVT." In ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82662.

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Noise and vibration are factors affecting the marketability of automobiles. It is required for the drivetain design not to transmit unpleasant noise and vibration to the passengers when driving. As for continuous variable transmission (CVT), noise that is considered to be generated from the metal pushing V-belt has been studied. A research project on this matter reported an estimated mechanism that attributes the noise to self-inducing vibration between the metal pushing V-belt and the pulleys. The self-induced vibration occurs when dynamic friction characteristics exhibit a negative gradient in relation to the sliding speed. However, the effect of the gradient on frequency spectrum of the noise has not been quantitatively elucidated in a consistent manner. In this research, noise at the vehicle start-up phase was studied based on the already reported prediction technology for metal pushing V-belt behavior. In other words, this study focuses on the effect of the friction characteristic gradient between the metal pushing V-belt and the pulleys on each element’s behavior and frequency components of belt pushing force. The results revealed that self-induced vibration on the element V-surface at the exit of the drive pulley excites high-order string vibration at the belt string, generating noise via the transmission case. In addition, it was also found that acoustic energy that excites the high-order string noise is affected by the change in belt pitch diameter at the exit of the pulley, and this determines the magnitude of frequency spectrum of the noise. It was concluded from the above findings that the change in the pitch diameter can be suppressed by narrowing the radial clearance between the shaft and the movable pulley and this measure is effective in reducing noise.
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Cammalleri, Marco, and Francesco Sorge. "Approximate Closed-Form Solutions for the Shift Mechanics of Rubber Belt Variators." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86638.

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The mechanical behavior of V-belt variators during the speed ratio shift is different from the steady operation as a gross radial motion of the belt is superimposed to the circumferential motion. The theoretical analysis involves equilibrium equations similar to the steady case, but requires a re-formulation of the mass conservation condition making use of the Reynolds transport theorem. The mathematical model of the belt-pulley coupling implies the repeated numerical solution of a strongly non-linear differential system. Nevertheless, an attentive observation of the numerical diagrams suggests simple and useful closed-form approximations for the four possible working modes of any pulley, opening/closing, driver/driven, whose validity ranges over most practical cases. The present analysis focuses on the development of such simplified solutions, succeeding in an excellent matching with the numerical plots, and on the comparison of the theory with some experimental tests on a motorcycle variator, revealing a very good agreement.
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Bhate, Rohan, and Nilabh Srivastava. "Transient-Dynamic Model of a Metal V-Belt CVT for Ratio Shift Control Applications." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66440.

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Abstract:
A continuously variable transmission (CVT) enhances the fuel economy and acceleration performance of a vehicle by allowing the engine to operate at or near its best specific fuel consumption rate for variable driving scenarios. A large volume of work has been reported on the dynamic modeling a metal V-belt CVT system. Most of the models mentioned in literature are steady-state quasi-static equilibrium based or multibody-formalism based, thereby being unsuitable for CVT control applications. Since steady state models fail to accurately capture inertial effects and multibody models present a challenge for control applications due to the large number of bodies involved, the focus of the current work has been to develop a simulation model relatively quick and accurate enough to predict the power transmission behavior and inertial dynamics of a metal pushing V-belt CVT at transient states. The objective of this research is to develop a detailed continuous one-dimensional transient-dynamic model of a metal V-belt CVT system for control applications. The model presented in this work is able to capture the dynamic correlation between the required pulley axial forces and the corresponding transmission ratio. In addition to this, it takes into account detailed inertial effects and predicts the slip behavior and torque capacity of the CVT system under both transient and steady-state regimes. The model proposed in this work would serve as a powerful tool to develop fast, reliable, and accurate controllers for a CVT-equipped driveline to meet the objectives of reduced losses, higher torque capacity, higher vehicle fuel economy and better acceleration performance. The results from the present model subsequently discuss in detail the transient performance of a metal V-belt CVT drive for high torque loading conditions. Various control strategies can be readily implemented with this detailed transient-dynamic model of a metal V-belt CVT system to achieve minimum slip loss and maximum fuel economy and torque capacity.
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Nomura, Shinnosuke, Kazuya Okubo, and Toru Fujii. "Shifting Speed and Belt Behavior of Model CVT (Continuously Variable Transmission) with Push and Pull Type V-belt Driven on Semi-Transparent Pulleys - Influence of Stiffness of V-belt in Clamping Direction." In 4th International Conference on Vehicle Technology and Intelligent Transport Systems. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0006781604740480.

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10

Srivastava, Nilabh, Vincent Y. Blouin, and Imtiaz U. Haque. "Using Genetic Algorithms to Identify Initial Operating Conditions for a Transient CVT Model." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61999.

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A Continuously Variable Transmission (CVT) provides a continuum of gear ratios between desired limits. CVT is a promising automotive technology and a sundry of models has been researched to realize the potential benefits of a CVT. CVT, being a highly nonlinear system, has a definite operating regime where it is able to maximize the torque transmission. The numerical model presented in this paper is difficult to solve because of its sensitivity with respect to the initial operating conditions such as initial belt tension, axial forces, and driven preload. The present research focuses on using Genetic Algorithms (GA) to identify these operating conditions and to understand the various dynamic interactions in a metal pushing V-belt CVT. This paper uses continuous Coulomb friction approximation theory to model friction between the belt and the pulleys. The computational scheme, the mathematical models, and the results corresponding to different loading scenarios are discussed.
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Reports on the topic "V-belts drive system"

1

Replace V-Belts with Notched or Synchronous Belt Drives, Motor Systems Tip Sheet #5 (Fact Sheet). Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1056711.

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