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International Journal of Automotive Technology

, Volume 15, Issue 1, pp 145–150 | Cite as

Design of 2-speed transmission for electric commercial vehicle

  • J. W. ShinEmail author
  • J. O. Kim
  • J. Y. Choi
  • S. H. Oh
Article

Abstract

As environmental and economic interests increase, the need for eco-friendly vehicle such as an electric vehicle (EV) has increased rapidly. Various research of enhancing EV powertrain efficiency and relibility have been studied. In this study, 2-speed shift gears mechanism is designed by using simpson type planetary gear train. This transmission has two planetary gear unit. Gear position is determinded by which ring gear is fixed. Internal components of the transmission are designed for satisfying the required specification of EV. We analyze gear strength, gear mesh efficiency, and transmission efficiency. By manufacturing the transmission prototype and performing some experiments, we verify the application suitability of this transmission.

Key Words

Electric vehicle Transmission Powertrain Planetary gear 

Nomenclature

Dm

mean diameter of friction plate, (mm)

Q

total torque capacity of all friction plates

Q1

torque capacity each friction plate

R

reduction gear ratio

T

torque with axial direction, (N.m)

Z

number of friction plates

ZS

number of sun gear teeth

ZP1

number of 1st planet gear teeth

ZP2

number of 2nd planet gear teeth

ZR1

number of 1st ring gear teeth

ZR2

number of 2nd ring gear

µ

friction coefficient of friction plate

ωS

angular velocity of sun gear

ωR

angular velocity of ring gear

ωC

a angular velocity of carrier

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References

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Copyright information

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

Authors and Affiliations

  • J. W. Shin
    • 1
    Email author
  • J. O. Kim
    • 2
  • J. Y. Choi
    • 2
  • S. H. Oh
    • 1
  1. 1.Department of Mechanical EngineeringChung-Ang UniversitySeoulKorea
  2. 2.SPG Co., Ltd.IncheonKorea

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