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Improving the Control Strategy of Hybrid Electric Vehicle Equipped with
Continuously Variable Transmission

Delkhosh, Mojtaba | 2016

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 48293 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Saadat Foumani, Mahmoud; Nasser, Lashgarian Azad
  7. Abstract:
  8. Hybridization of the vehicles is one of the main solutions for reducing the vehicles’ fuel consumption (FC) and emissions. Hybrid electric vehicles (HEVs) are one of the main groups of hybrid vehicles. In this type, an electric motor is employed to help the engine propel the vehicle. Other method which can be implemented to reduce the vehicle’s FC and emissions is to employ continuously variable transmission (CVT) as the vehicle power transmission. By using CVT, the engine will be able to operate in the rotational speed approximately independent of the vehicle speed, which leads to a reduction in the engine’ FC and emissions. One of the main concerns in the HEVs’ design is the layout of its components. On the other hand, the method of power distribution between the power sources during driving has an undeniable impact on the vehicle’s FC and emissions. This research includes some goals which are: introducing a simulation model for the HEV equipped with CVT, determining the optimal layout of components for the considered HEV and also improving the power management strategy of the HEV with the aim of reducing the vehicle’s FC and emissions, reducing the sensitivity of strategy to the driving behavior and facilitating its application as the real-time controller. For this aim, at first a simulation model for the HEV equipped with CVT is presented and the optimal operation points of the engine in terms of FC and emissions are defined. Afterwards, different layouts for the considered HEV are defined and compared to determine the optimal layout as well as the optimal type of CVT. Finally, some modifications on the power management strategy are proposed with the aim of reducing the vehicle’s FC and emissions, reducing the sensitivity of the power management strategy to the driving behavior, reducing the time of defining the optimal operating mode of the HEV and also facilitating the application of the power management strategy as the real-time controller
  9. Keywords:
  10. Continuously Variable Transmission (CVT) ; Control Strategy ; Emission ; Fuel Consumption ; Parallel Hybrid System ; Automotive Emissions ; Online Application ; Hybrid Vehicle Layout

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  • Untitled.pdf (p.1-167)
    • scan0003.pdf (p.1)
    • scan0001.pdf (p.2)
    • Manuscript (6th Edit).pdf (p.3-167)
  • 1.pdf (p.168-180)
  • 2.pdf (p.181-194)
  • 3.pdf (p.195-211)
  • 4.pdf (p.212-234)
  • 5.pdf (p.235-244)
  • 6.pdf (p.245-250)
  • 7.pdf (p.251-260)
  • scan0002.pdf (p.261)
  • English Abstract.pdf (p.262-263)
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