Title: Theoretical and experimental investigation of the thermal behaviour of a two-speed dual clutch transmission

Authors: Xingxing Zhou; Jiageng Ruan; Bo Zhu; Nong Zhang

Addresses: University of Technology Sydney, 15 Broadway, Ultimo, NSW2007, Australia; Guangdong Academy of Agricultural Sciences ' University of Technology Sydney, 15 Broadway, Ultimo, NSW2007, Australia ' HeFei University of Technology 193 Tunxi Rd, Baohe Qu, Hefei Shi, Anhui Sheng, 230000, China ' University of Technology Sydney, 15 Broadway, Ultimo, NSW2007, Australia

Abstract: Understanding the heating behaviour of automotive transmissions in an important step in prototype development, it plays a significant role in achieving appropriate tolerances at the design phase and strongly influences the system's durability in the long term. Furthermore, lubricant viscosity is strongly dependent on operating temperature, understanding this behaviour will provide insight into how transmission efficiency is affected during vehicle warm-up. In this paper, an experimental and simulation based study has been conducted to investigate the thermal behaviour of a two-speed dual clutch transmission (DCT) that has been developed for electric vehicle applications. This is achieved through the modelling of the power losses in the system that is then integrated with a compact thermal model of the transmission. Transient heating simulations for the transmission are conducted at constant speeds and compared with experimental studies, showing a strong correlation between results. Simulations are then utilised to investigate the load and speed dependencies of the transmission's thermal behaviour.

Keywords: thermal behaviour; heat dissipation; power losses; DCT; dual clutch transmission.

DOI: 10.1504/IJVP.2018.095316

International Journal of Vehicle Performance, 2018 Vol.4 No.3, pp.237 - 258

Received: 19 Dec 2016
Accepted: 30 Jul 2017

Published online: 28 Sep 2018 *

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