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Littérature scientifique sur le sujet « Transmission variable »

Auteur : Grafiati

Publié le 24 janvier 2024

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Articles de revues sur le sujet "Transmission variable"

Wagstaff, Ian. « Infinitely variable transmission ». ATZautotechnology 2, n^o 6 (novembre 2002) : 32–33. http://dx.doi.org/10.1007/bf03246736.

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Ivanov, Konstantin Samson. « Creation of Adaptive-Mechanical Continuously Variable Transmission ». Applied Mechanics and Materials 436 (octobre 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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Dilip Challirwar, Tanvi. « Continuously Variable Transmission (CVT) ». International Journal of Engineering Trends and Technology 67, n^o 3 (25 mars 2019) : 62–65. http://dx.doi.org/10.14445/22315381/ijett-v67i3p211.

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Hoeijmakers, M. J., et J. A. Ferreira. « The electric variable transmission ». IEEE Transactions on Industry Applications 42, n^o 4 (juillet 2006) : 1092–100. http://dx.doi.org/10.1109/tia.2006.877736.

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Herák, D., V. Šleger, R. Chotěborský, K. Houška et E. Janča. « Kinematical characteristic of mechanical frictional variable speed drive ». Research in Agricultural Engineering 52, No. 2 (7 février 2012) : 61–68. http://dx.doi.org/10.17221/4881-rae.

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The paper describes a new system of mechanical spherical conical friction drive. In the present a row of simple friction, belt, chain, wave and differential variable speed drives is published. For the required range of speed variation they are altogether unfit. The currently used power transmissions are of low efficiency (60–70%). Therefore the better power transmission efficiency is required. The possibility of multicontact power transmission appears as the most suitable principle of the power transmission. Using the designed function model, which was made according to the small tractor producers requirements, the real output kinematical characteristic was measured. It is derived the complete drive conversion unit kinematics and the theoretical kinematical characteristic design. The theoretical design is compared with the real characteristic determined by measuring using the test station. From the measured values we determined that the geometrical characteristic, i.e. the relation between output speed and ring position, corresponds in the ring position range (2.8÷14) mm to the theoretical premise.

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Chen, I.-Ming, Yuan-Yao Huang, Tai-Her Yang et Tyng Liu. « Limited-slip and torque-vectoring effect of a dual continuously variable transmission ». Proceedings of the Institution of Mechanical Engineers, Part D : Journal of Automobile Engineering 231, n^o 3 (5 août 2016) : 372–82. http://dx.doi.org/10.1177/0954407016639465.

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This study investigates the limited-slip and steering characteristics of a dual continuously variable transmission system. The dual continuously variable transmission is a unique final drive system composed of two continuously variable transmissions, with one continuously variable transmission connected to each rear wheel. In this study, a dynamic model of the dual continuously variable transmission system is derived, and models of the conventional final drive systems, i.e. the solid axle and the open differential, are used as benchmarks. In the simulations, the dual continuously variable transmission model, the solid axle model and the open differential model are applied to a vehicle dynamic model for split- μ road tests and a series of steering tests. According to the results of the split- μ road tests, the limited-slip function of a dual continuously variable transmission system is verified. The results of the steering tests show that different torque distributions for the inside wheels and the outside wheels while cornering can be controlled with different gain values of the continuously variable transmissions; for this reason, the application of the dual continuously variable transmission system as a torque-vectoring device is proposed, and a basic setting principle is presented. The results of this study establish a fundamental knowledge for developing the dual continuously variable transmission as an advanced final system for improving the vehicle dynamics.

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TAKAYAMA, Toshio, Takafumi ARAKAWA et Toru OMATA. « Coupled Driven Variable Transmission Unit ». TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 78, n^o 794 (2012) : 3541–51. http://dx.doi.org/10.1299/kikaic.78.3541.

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Cohen, Aaron E., et Keshab K. Parhi. « Secure Variable Data Rate Transmission ». IEEE Transactions on Circuits and Systems II : Express Briefs 58, n^o 2 (février 2011) : 100–104. http://dx.doi.org/10.1109/tcsii.2011.2106313.

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Verbelen, Florian, Joachim Druant, Stijn Derammelaere, Hendrik Vansompel, Frederik De Belie, Kurt Stockman et Peter Sergeant. « Benchmarking the permanent magnet electrical variable transmission against the half toroidal continuously variable transmission ». Mechanism and Machine Theory 113 (juillet 2017) : 141–57. http://dx.doi.org/10.1016/j.mechmachtheory.2017.03.005.

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Chen, Suifan, et Zhifeng Dong. « Transmission characteristics and phase number optimization on the transmission mechanism of rod gear pulse continuously variable transmission ». Advances in Mechanical Engineering 10, n^o 1 (janvier 2018) : 168781401775196. http://dx.doi.org/10.1177/1687814017751966.

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In order to solve the oversize problem of continuously variable transmission, a rod gear pulse continuously variable transmission is designed. The kinematic mathematical models of key components are established by the matrix method and are simulated by MATLAB in a single phase, based on the analysis of basic structure and working principle of transmission. Also, the length requirements of each rod are studied, and the effect of three adjustment manners on the output-speed is simulated in the single phase. Furthermore, the simulations of the movement law of annular gear are achieved on two conditions of both different phases and different eccentricities on 8-phase. The results show that the manner of adjusting the eccentricity of eccentric wheel is the preferential selection of out-speed regulating method, and 8-phase is an optimal phase of transmission; meanwhile, for the rod gear pulse continuously variable transmission, the variable range of transmission ratio is wider and the pulsation rate is far less than the other traditional continuously variable transmissions.

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Thèses sur le sujet "Transmission variable"

Burger-Scheidlin, Christoph. « Variable rate transmission over noisy channels ». Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3318.

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Hybrid automatic repeat request transmission (hybrid ARQ) schemes aim to provide system reliability for transmissions over noisy channels while still maintaining a reasonably high throughput efficiency by combining retransmissions of automatic repeat requests with forward error correction (FEC) coding methods. In type-II hybrid ARQ schemes, the additional parity information required by channel codes to achieve forward error correction is provided only when errors have been detected. Hence, the available bits are partitioned into segments, some of which are sent to the receiver immediately, others are held back and only transmitted upon the detection of errors. This scheme raises two questions. Firstly, how should the available bits be ordered for optimal partitioning into consecutive segments? Secondly, how large should the individual segments be? This thesis aims to provide an answer to both of these questions for the transmission of convolutional and Turbo Codes over additive white Gaussian noise (AWGN), inter-symbol interference (ISI) and Rayleigh channels. Firstly, the ordering of bits is investigated by simulating the transmission of packets split into segments with a size of 1 bit and finding the critical number of bits, i.e. the number of bits where the output of the decoder is error-free. This approach provides a maximum, practical performance limit over a range of signal-to-noise levels. With these practical performance limits, the attention is turned to the size of the individual segments, since packets of 1 bit cause an intolerable overhead and delay. An adaptive, hybrid ARQ system is investigated, in which the transmitter uses the number of bits sent to the receiver and the receiver decoding results to adjust the size of the first, initial, packet and subsequent segments to the conditions of a stationary channel.

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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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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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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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Kolks, Giacomo, et Jürgen Weber. « Electro-hydrostatic compact drives with variable transmission ratio ». Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71209.

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Electro-hydrostatic compact drives are an emerging technology within a range of industrially available translational drive solutions, combining the specific advantages of hydraulic and electromechanical screw drives. Compared to electromechanical screw drives, hydrostatic drives can vary their transmission ratio with comparably little effort, giving them the key advantage of downsizing the electric drive components for a given load cycle. This paper provides a guideline on how to calculate the downsizing potential of electric motors and inverters arising from variable transmission ratio based on the load regime of a given application. Furthermore, a comprehensive systematisation of the actual switching process is described for systems that are switched by means of switching valves. The presented set of methodology is applied to demonstrators in order to validate the general findings.

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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 the design challenges associated with hybrid and electric vehicle platforms. Results from this research include the fundamental torque and rpm relationships that exist in a multiple-input, single-output power transmission device. These results were deduced from a test that incorporated two separate power inputs into a differential which combined to produce a single output. Testing displayed that a differential has the ability to function as an infinitely variable transmission (IVT). Additionally, the challenges associated with using a differential as a multiple-input, single-output device were identified. Recommendations for overcoming these challenges are also presented herein. This work provides the basis for future work in powertrain optimization for multiple-input, single-output transmission devices.

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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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Lahr, Derek Frei. « Development of a Novel Cam-based Infinitely Variable Transmission ». Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/35759.

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An infinitely variable transmission (IVT) is a transmission that can smoothly and continuously vary the speed ratio between an input and output from zero to some other positive or negative ratio; they are a subset of continuously variable transmissions (CVTs), which themselves do not have the ability to produce a zero gear ratio. In this thesis, the operation, analysis, and development of a novel, highly configurable, Cam-based Infinitely Variable Transmission of the ratcheting drive type is presented. There are several categories of CVTs in existence today, including traction, belt, and ratcheting types. Drives of these types, their attributes, and associated design challenges are discussed to frame the development of the Cam-based IVT. The operation of this transmission is kinematically similar to a planetary gearset, and therefore, its operation is described with that in mind including a description of the six major components of the transmission, those being the cam, followers, carriers, planet gears, sun gears, and one way clutches. The kinematic equation describing its motion is derived based on the similarities it shares with a planetary gearset. Additionally, the equations for the cam design are developed here as the operation of the CVT is highly dependent on the shape of the cam. There are six simple inversions of this device and each inversion has special characteristics and limitations, for example, the available gear range. A method was developed to select the most suitable inversion, gearing, and follower velocity for a given application. The contact stress between the rollers and cam is the limiting stress within the transmission. A parametric study is used to quantify the relationship between this stress and the transmission parameters. Based off those results, two optimization strategies and their results are discussed. The first is an iterative brute force type numerical search and the second is a genetic algorithm. The optimization results are shown to be similar and successfully reduced the contact stress by 40%. To further improve the transmission performance, several mechanisms were developed for this unique transmission. These include a compact and lightweight differential mechanism based on a cord and pulley system to reduce the contact force on the rollers. In addition, a unique external/inverted cam topology was developed to improve the contact geometry between the rollers and said cam. A prototype was built based on both the optimization strategies and these mechanisms and is described within. Finally, a Prony brake dynamometer with cradled motor was constructed to test the transmission; the results of those tests show the Cam-based IVT to be 93% efficient at low input torque levels.
Master of Science

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Bamhdi, Alwi M. « Variable power transmission in highly Mobile Ad-Hoc Networks ». Thesis, Heriot-Watt University, 2014. http://hdl.handle.net/10399/2780.

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Mobile Ad Hoc Networks pose challenges in terms of power control, due to their fixed transmission power, the mobility of nodes and a constantly changing topology. High levels of power are needed in wireless networks, particularly for routing. As a result of the increase in the number of communication devices being used, there is the challenge of increased density within these networks, and a need to extend the battery life of communication devices. In order to address this challenge, this thesis presents the development of a new protocol (Dynamic Power AODV), which is an enhancement of the Ad Hoc On Demand Distance Vector (AODV) protocol. The new protocol dynamically adjusts the transmission power based on the range, which depends on node density. This thesis provides a systematic evaluation of the performance of DP-AODV, in a high speed and high density environment, in comparison with three other routing protocols. The experiments demonstrated that DP-AODV performed better than two of the protocols in all scenarios. As compared to the third protocol (AOMDV), DP-AODV gave better performance results for throughput and Power Consumption, but AOMDV performed better in terms of Packet Delivery Fraction rate and End-to-End Delay in some cases.

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Fecko, Mariusz, Kirk Chang, Heechang Kim, Andrzej Cichocki, Larry Wong, Ray O'Connell, Mark Radke, Tom Young et Thomas Grace. « CAPACITY ALLOCATION FOR TELEMETRY LINKS WITH VARIABLE TRANSMISSION RATES ». International Foundation for Telemetering, 2016. http://hdl.handle.net/10150/624232.

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Current IP-based telemetry systems such as iNET perform capacity allocation among multiple radios under the assumption of uniform link rates. This assumption breaks down when adaptive modulation is deployed to vary link rates in response to channel degradation. In particular, many modern radios can increase their transmission rate through adaptive coding. To take advantage of these increased rates, we designed several iNET Link Manager (LM) bandwidth allocation algorithms for the future iNET that implements adaptive coding techniques. These new LM algorithms include both weight-based schemes in which link bandwidth is allocated based on the priority assigned to the links and queues, as well as a greedy algorithm in which link bandwidth is allocated strictly based on link rates. We evaluated the effectiveness of these algorithms using both analytical analysis and test-bed experimentation. Through a rich set of test-cases, we conclude that a weight-based algorithm in which link priority is assigned using the product of link weight and link data rate has the best performance, and hence can be considered for the future iNET LM.

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Livres sur le sujet "Transmission variable"

Maten, John R., et 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 et Society of Automotive Engineers, dir. Continuously variable transmission (CVT). Warrendale, Pa : SAE, 2006.

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Jean, Stephanie. Ion conducting polymers for electrochromic variable transmission windows. Manchester : UMIST, 1996.

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The application of variable speed drives. Research Triangle Park, N.C : Instrument Society of America, 1987.

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Variable speed drive fundamentals. Lilburn, GA : Fairmont Press, 1994.

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(Firm), Knovel, dir. Variable speed drive fundamentals. 3^e éd. Lilburn, GA : Fairmont Press, 1999.

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Variable speed drive fundamentals. 2^e éd. Liburn, GA : Fairmont Press, 1997.

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Variable speed drive fundamentals. 3^e éd. Lilburn, GA : Fairmont Press, 1999.

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Bizon, Thomas P. Real-time transmission of digital video using variable-lengthbcoding. [Washington, DC : National Aeronautics and Space Administration, 1993.

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Bizon, Thomas P. Real-time transmission of digital video using variable-lengthbcoding. [Washington, DC : National Aeronautics and Space Administration, 1993.

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Chapitres de livres sur le sujet "Transmission variable"

Chen, Yong. « Continuously Variable Transmission ». Dans 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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Klie, Robert F., Weronika Walkosz, Guang Yang et Yuan Zhao. « Variable Temperature Electron Energy-Loss Spectroscopy ». Dans Scanning Transmission Electron Microscopy, 689–723. New York, NY : Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-7200-2_17.

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Ivanov, K. S., A. D. Dinassylov et E. K. Yaroslavceva. « Adaptive Mechanical Continuously Variable Transmission ». Dans 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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Valsecchi, Giorgio, Fabian Tischhauser, Jonas Junger, Yann Bernarnd et Marco Hutter. « Actively Variable Transmission Robotic Leg ». Dans Synergetic Cooperation between Robots and Humans, 40–51. Cham : Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-47272-5_4.

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Pandey, Vijay Kumar. « A Study of Continuous Variable Transmission ». Dans International Conference on Intelligent Emerging Methods of Artificial Intelligence & ; Cloud Computing, 277–84. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92905-3_36.

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Agrawal, Ajay. « Review on Continuous Variable Transmission (CVT) ». Dans 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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Ivanov, K. S. « Synthesis of Toothed Continuously Variable Transmission (CVT) ». Dans 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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Sun, Hao, et Harald Aschemann. « Sliding Mode Control for a Hydrostatic Transmission in Combination with a Sliding Mode Observer ». Dans Variable-Structure Approaches, 155–88. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31539-3_6.

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Ivanov, K., et B. Tultaev. « Toothed Continuously Variable Transmission (CVT) – Industrial Realization ». Dans 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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Dai, Hong, Jiacheng Li et Ling Ren. « Cross-Layer Transmission Variable Routing Measurement Model ». Dans Lecture Notes in Electrical Engineering, 1443–49. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5959-4_176.

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Actes de conférences sur le sujet "Transmission variable"

Huang, Yuan Mao, et Bi Shyang Hu. « Optimum Design of the Continuously Variable Transmission for a Motorcycle ». Dans ASME 2001 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-ice-439.

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Abstract Many design parameters affect the performance of continuous variable transmissions. This paper presents the optimization of a continuous variable transmission by using the simulated annealing algorithm. The Bessel method of curve fitting and the tensor product method of surface fitting were used to facilitate the discrete fuel consumption, emissions of carbon monoxide (CO) and HC compound of experimental engine data. A compromise method was used to analyze the multi-objective functions. The values for design variables are recommended for further development.

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Kim, Songho, Michael Peshkin et J. Edward Colgate. « Causes of Slip in a Continuously Variable Transmission ». Dans 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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Grenier, Martin, et Cle´ment Gosselin. « Kinematic Optimization of a Robotic Joint With Continuously Variable Transmission Ratio ». Dans ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48443.

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The range of possible tasks achievable by robots highly depends on the selection of motors and transmissions. For example, variable ratio transmissions surpass single ratio transmissions because they can modify the torque-speed parameters of the actuator and, therefore, maintain the optimal power output state from the motor. Consequently, the use of variable ratio transmissions may expand a robot’s achievable tasks. A robotic joint with continuously variable transmission ratio is presented in this paper. This new type of transmission joint may be used in serial or parallel robots. The transmission consists of a doubly actuated two-degree-of-freedom five-bar parallel mechanism. The main actuator is located at the input revolute joint. The variation of the ratio is achieved with the adjustment actuator located at a second revolute joint. Such a transmission, based on a linkage, may have unde-sired ratio variations for a constant adjustement joint position. Therefore, two different optimization methods are presented to determine the best geometric parameters in order to minimize the undesired ratio variation while maximizing the possible transmission ratio range. The performance indices are either optimal for the entire range or only for the maximum and minimum ratios available. A simulation is presented with the best parameters obtained with the optimization based on the maximum and minimum ratios. Results show a transmission ratio ranging from 0.9:1 to 4.5:1 with a minimal amplification of 3.9:1. The transmission ratio may vary continuously within the working boundaries. The output range of motion may be adapted to a serial robot joint.

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Draper, Russell S., Michael V. Wood, Bijan Radmard, Ken Mahmud, Peter Schuler, Gregory A. Sotzing, Venkataraman Seshadri, Warren Mino, Javier Padilla et Tobibio F. Otero. « Electrochromic variable transmission optical combiner ». Dans Defense and Security, sous la direction de Darrel G. Hopper, Eric W. Forsythe, David C. Morton, Charles E. Bradford et Henry J. Girolamo. SPIE, 2005. http://dx.doi.org/10.1117/12.609036.

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Cui, Minghao, et Violet R. Syrotiuk. « Fair Variable Transmission Power Control ». Dans IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference. IEEE, 2007. http://dx.doi.org/10.1109/glocom.2007.133.

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Brush, Ethan R., et Carl A. Nelson. « A Positively-Engaged Infinitely Variable Transmission Using Split Helical Gears ». Dans ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85260.

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Continuously variable transmissions (CVTs), and the subset known as infinitely variable transmissions (IVTs) with gear ratio ranges reaching zero (0:1 or 1:∞ or “geared neutral”), offer motors the ability to run in preferred angular velocity ranges independent of transmission output speed, allowing optimization for power, torque, and efficiency. This paper presents and analyzes a positively engaged IVT (PE-IVT) mechanism of an entirely new type and working principle which solves the problems of current CVTs and is applicable to the unique requirements of robots, electric vehicles (EVs), and hybridelectric vehicles (HEVs).

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Palma, Orlando, et Carlos Cruz. « Non Linear Dynamic and Control of New Concept Orbital Pulley Infinitely Variable Transmission ». Dans ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62225.

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The continuously variable transmissions (CVT) have been extensively studied, however, few studies of transmissions have been made that can reach the neutral and reverse rotational speeds through the separation distance of a half sided central pulley as a single variable control. This paper proposes a new clutchless transmission model, which operates through orbital pulleys to change velocity ratios for forward and reverse through neutral such that an infinitely variable transmission (OP-IVT) is obtained. The concept is described and explained, and the dynamic model of the system is proposed and shown in open loop. The system is also controlled via a numerical simulation program with PID control showing the dynamic closed loop behaviour of the generated model in trajectory tracking and disturbance rejection, showing the control as the capability to meet a wide range of speeds without losing the known efficiency performance of current continuously variable transmissions.

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Hebbale, Kumar, Dongxu Li, Jing Zhou, Chengwu Duan, Chi-Kuan Kao, Farzad Samie, Chunhao Lee et Robert Gonzales. « Study of a Non-Circular Gear Infinitely Variable Transmission ». Dans ASME 2014 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/dscc2014-6083.

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Improving automobile fuel efficiency is an important research and development effort in the automotive industry. In the transmission area, it is generally understood that optimum fuel economy can be achieved via a combination of highly efficient power transfer (gears, for example) and an ability to transmit power at an infinite number of ratios (CVT, for example). In this paper, a geared infinitely variable transmission (IVT) is analyzed for efficiency through static analysis. This IVT is based on a non-circular gear concept described in [1, 2]. This IVT consists of multiple function generators with each function generator comprising two sets of non-circular gear sets whose outputs are combined with a summing planetary gear set. Each function generator provides the desired gear ratio for only a part of the driving rotation. So, multiple function generators are combined along with multiple one-way clutches to provide an infinitely variable transmission. This paper first explains the operating principle of the geared IVT. A static analysis of the IVT powerflow is derived and it is shown that this powerflow exhibits a torque recirculation phenomenon, which is not desired. This recirculation phenomenon is expected to be present in all similarly arranged IVTs where two inputs are combined using a planetary gear set to provide infinite gear ratio capability. The efficiency of the IVT is calculated based on assumed individual component efficiency and it is shown that, owing to torque recirculation, the efficiency of this transmission may not compare well with that of current automatic transmissions for a passenger car application.

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Grosjean, Leefke, Ragnar Thobaben, Lars K. Rasmussen et Mikael Skoglund. « Variable-Rate Anytime Transmission with Feedback ». Dans 2016 IEEE 84th Vehicular Technology Conference (VTC-Fall). IEEE, 2016. http://dx.doi.org/10.1109/vtcfall.2016.7881963.

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Yutao, Luo, Zhou Sijia, Zhao Kegang et Huang Xiangdong. « Electromagnetism Coincidence Continuously Variable Transmission System ». Dans SAE 2006 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2006. http://dx.doi.org/10.4271/2006-01-1310.

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Rapports d'organisations sur le sujet "Transmission variable"

Yu, Christopher C. Video Transmission for Quantized Variable Bandwidth Networks. Fort Belvoir, VA : Defense Technical Information Center, septembre 1994. http://dx.doi.org/10.21236/ada284892.

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

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

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Kaneko, Yutaka, Kazutaka Adachi, Kimio Kanai et Yoshimasa Ochi. Design of a Gear Ratio Servo Control System for Toroidal Continuously Variable Transmission. Warrendale, PA : SAE International, mai 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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Cotrell, J. Motion Technologies CRADA CRD-03-130 : Assessing the Potential of a Mechanical Continuously Variable Transmission. Office of Scientific and Technical Information (OSTI), septembre 2004. http://dx.doi.org/10.2172/15009604.

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Akama, Shun-ichi, Yasunori Murayama et Shigeho Sakoda. Torque Control of Rear Wheel by Using Inverse Dynamics of Rubber/Aramid Belt Continuous Variable Transmission. Warrendale, PA : SAE International, octobre 2013. http://dx.doi.org/10.4271/2013-32-9042.

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Gallo, C., R. Kasuba, A. Pintz et 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), mars 1986. http://dx.doi.org/10.2172/6684402.

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Gangadurai, Mohan, B. Sreekumar et 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, octobre 2005. http://dx.doi.org/10.4271/2005-32-0007.

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