Journal of Mechanical Science and Technology

, Volume 28, Issue 4, pp 1153–1160 | Cite as

Energy efficient electromagnetic actuated CVT system

  • Ataur RahmanEmail author
  • Sazzad Bin Sharif
  • A. K. M. Mohiuddin
  • Mahbubur Rashid
  • Altab Hossain


A continuously variable transmission (CVT) system transmits the engine/battery power to the car driving wheel smoothly and efficiently. Several types of CVT already been developed to improve the transmission losses while maintaining acceleration time. However, most of the CVT has some constraints in the actuation mechanism which led us to develop an innovative electromagnetic actuator for CVT. Simplified mathematical equations have been developed for the kinematics analysis of clamping forces of the CVT and electromagnetic forces of EMA. The EMA has been developed for ¼ scale car with two sets of solenoid. Each of the two sets has been equipped with primary and secondary pulleys for pushing and pulling the movable sheave. The solenoid is operated by controlling the supply current with a fuzzy logic controller. A simulation based fuzzy logic controller has been introduced here for identifying the desired current of the EMA actuation. The experimental results show that the EMA develops electromagnetic forces 301 N for the supply current of 3.37 amp, which makes the acceleration time of the car in the range of 2.5∼3.5 sec and electromagnetic actuated CVT system highly energy efficient.


EMA-CVT Clamping force Electromagnetic force Travelling time Acceleration time Fuzzy logic Energy efficient 


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  1. [1]
    K. K. Ang, A. Quek and A. Wahab, MCMAC-CVT: a novel on line associative memory based CVT transmission control system, Neural Networks, 15 (2002) 219–236.CrossRefGoogle Scholar
  2. [2]
    C. Brace, M. M. Deacon, N. D. Vaughan, C. R. Burrows, R. W. Horrocks, Integrated passenger car diesel CVT powertrain control for economy and low emissions, IMechE International Seminar S540’ Advanced Vehicle Trans missionsand Powertrain Management, Sept (1997) 25–26.Google Scholar
  3. [3]
    M. Burke, G. Briffet, J. Fuller, H. Heuman and J. Newall, Powertrain efficiency optimisation of the torotrak infinitely variable transmission (IVT), SAE, 2003-01-0971 (2003).Google Scholar
  4. [4]
    K. Carman, Prediction of soil compaction under pneumatic tires a using fuzzy logic approach, Journal of Terramechanics, 45 (2008) 103–108.CrossRefGoogle Scholar
  5. [5]
    M. Gopal, Digital control and state variable methods: conventional and intelligent control systems, 3rd ed., Tata McGraw-Hill Education Pvt. Ltd (2009).Google Scholar
  6. [6]
    W. H. Hayt Jr. and J. A. Buck, Engineering electromagnetics, 7th Ed., McGraw-Hill International Edition (2006).Google Scholar
  7. [7]
    B. Marcus, F. Pfeiffer and H. Ulbrich, Elastic modelling of bodies and contacts in continuous variable transmissions, Multibody System Dynamics, 13 (2005) 175–194.CrossRefGoogle Scholar
  8. [8]
    Pesgens, Michiel, Vroemen, Bas, Stouten, Bart, Veldpaus, Frans and Steinbuch, Maarten, Control of a hydraulically actuated continuously variable transmission, Vehicle System Dynamics, 44(5) (2006) 387–406.CrossRefGoogle Scholar
  9. [9]
    Rahman, Ataur, B. S. Sazzad and A. Hossain, Kinematics and non-linear control of electromagnetic actuated CVT system, Journal of Mechanical, Science and Technology, 26(7) (2012) 2189–2196.CrossRefGoogle Scholar
  10. [10]
    E. Richer and Y. Hurmuzlu, A high performance pneumatic force actuator system: Part I-Nonlinear mathematical model, Journal of Dynamic Systems, Measurement, and Control system for passenger vehicle, 122 SEPTEMBER (2000) 416–425.Google Scholar
  11. [11]
    T. Toshie, Electromagnetic actuator design technology using electromagnetic coupled with motion analysis, Mitsubishi Electric., 116 (2006) 2–4.Google Scholar
  12. [12]
    F. T. Ulaby, Electromagnetics for engineers, Pearson International Edition (2005).Google Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Ataur Rahman
    • 1
    Email author
  • Sazzad Bin Sharif
    • 1
  • A. K. M. Mohiuddin
    • 1
  • Mahbubur Rashid
    • 2
  • Altab Hossain
    • 3
  1. 1.Department of Mechanical EngineeringInternational Islamic University MalaysiaMalayaMalaysia
  2. 2.Department of Mechatronics EngineeringInternational Islamic University MalaysiaMalayaMalaysia
  3. 3.Department of Mechanical EngineeringUniversity MalayaMalayaMalaysia

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