Design of Gear Shift Map for Automatic Transmission considering Transmission Efficiency

Han, Jae‐Hoon; Jeong, Ho-Un; Hwang, Sung Ho

doi:10.7467/ksae.2019.27.8.611

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…Alternatively, there is ongoing development of shift maps and transmission logic that optimally consider both performance and efficiency [20][21][22]. Diverse research initiatives are currently underway to validate transmission logic and shift maps tailored to the specific objectives of the vehicle [23].…”

Section: Introductionmentioning

confidence: 99%

Development of Shift Map for Electric Commercial Vehicle and Comparison Verification of Pneumatic 4-Speed AMT and 4-Speed Transmission with Synchronizer in Simulation

Kim,

Lee,

Jin

et al. 2024

Energies

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As the automotive industry transitions from internal combustion engine vehicles to the era of electric cars, extensive research is being conducted in the field of electric vehicles. While a significant portion of this research focuses on the electrification of passenger cars, commercial vehicles have experienced relatively modest changes towards electric propulsion. Particularly, challenges related to power and efficiency have prompted a concentrated effort in addressing these issues. However, improvements in the efficiency of motors and inverters are reaching their limits, necessitating the development of multi-speed transmissions for electric commercial vehicles to enhance overall system efficiency. In this paper, the development of a 4-speed transmission with a synchronizer designed for electric commercial vehicles is presented as part of a project. A transmission shift map was developed, and verification of increased power and efficiency was conducted through a comparison with the existing product (a pneumatic 4-speed internal combustion engine transmission) installed in the target commercial vehicle. The study utilized vehicle dynamics, component modeling, and simulation environments to assess the improvements in performance.

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