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Geometrical Optimization of Traction Infinitely Variable Transmission for Minimizing of Rollers Deformation

Afzali, Abolfazl | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45385 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Zohoor, Hasan
  7. Abstract:
  8. With intensified concerns of rising fuel vehicles that reduce fossil fuel globally and also prescript strict rules by standard institutes, vehicle manufacturers try to find a way for reducing the fuel of their products. One these methods use a continuously variable transmission (CVT) instead of manual and automatic gearboxes. Various CVT’s have been proposed in recent year.
    One of the proposed systems is traction infinitely variable transmission (TIVT) that is type of traction drive continuously variable transmission and has been presented in 2007. Research on this system showed that average efficiency is about 96% that is high efficiency. Completed research in 2011 showed that despite the high efficiency of this system but rollers deformation is significant and it can not be ignored. presented equation showed that rollers deformation is function of geometric parameters of system. In this research has been effort to optimize the geometric parameters in rollers deformation, the quantity to be minimized. to this end using the optimization toolbox of MATLAB software that based on particle swarm optimization (PSO) works, optimization has been done and maximum rollers deformation decreased from 8.31mm to 4.69mm. Also the average efficiency with optimum geometry was achieved about 94%
  9. Keywords:
  10. Deformation ; Roll ; Optimization ; Particles Swarm Optimization (PSO) ; Traction Infinitely Variable Transmission (TIVT)

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