Session two

Online sessions of CTI Symposium China 2020

Session two: 23 September 2020
China time: 4:00-5:00 p.m.(CET 10:00-11:00 a.m.)
Presentation language: Chinese


Prof. Dr CHEN Yong

Prof. Dr CHEN Yong
Professor, Hebei University of Technology
Senior Chief Engineer, Geely Powertrain Research Institute

Speaker one:

Dr. ZHANG Shemin

Dr. ZHANG Shemin
Lead Engineering
Technical Center, Dongfeng Motor Corporation


Challenges and Response of Transmission under Electrification Wave

  • Electrification route analysis in LCA perspective
  • Opportunities and challenges of transmission
  • Dongfeng’s response strategy


1. Electrification route analysis in LCA perspective The concept of life cycle assessment(LCA); Research status and implementation plan of LCA at home and abroad Carbon emission of WLTC and LCA were analyzed based on DFTC model, the results show that HEV is competitive Conclusion: Based on China’s power structure, HEV should be developed on the basis of improving ICE thermal efficiency.

2. Opportunities and challenges of transmission Opportunities:Transmission may become the carrier and command platform of the hybrid drive system in HEV Challenges: How to balance performance and cost to meet the needs from different levels of HEV; Technical difficulties of hybrid transmission, including NVH, reliability, efficiency and comfort 3. Dongfeng’s response strategy Based on the research of DFTC hybrid transmission structure, a modular hybrid electric drive system is proposed to cover the needs of different platforms DFTC NVH and reliability development process, hybrid transmission development technology and product technology worth considering.

Based on Life Cycle Assessment idea and Chinese electricity structure, this presentation analysis and forecasts the real carbon emission of different electrification route. HEV DHT structure analysis covers almost all possible candidates and present a modular HEV DHT structure to cover different requirements of all vehicle platform with less development cycle and low cost. A full view analysis of new requirements and challenges for transmission with electrification is present, and possible method and technology is present.

Speaker two:


CHEN Xiaolong
Senior Product Development Director
New Energy Powertrain Development Department
Chang An New Energy Vehicle Technology Co., Ltd.


Research of key technology from eDrive transmission

  • The importance of efficiency from eDrive transmission
  • The key technology of efficiency from eDrive transmission
  • Key technology break-through of eDrive transmission at Chang An
  • Technology bottle neck of efficiency from eDrive transmission


Fuel consumption regulations, CAFC&NEV Credit and “Energy Consumption Limits for Electric Vehicles” standard have pushed the development of electric vehicle low energy consumption trend.

This article starting from national policy regulation requirements, industry trend, consumer and business demand, benefits, analysis the importance of eDrive transmission, taking efficiency theory as research foundation, energy losses during power transmission as research object. Together with simulation analysis and testing data, from transmission ratio, seal components, bearing, to lubrication, the internal factors and efficiency sensibility of eDrive transmission will be analyzed; from design differences of eDrive transmission, external environment temperature, the external factors and efficiency sensibility will be analyzed, which contributes to increase eDrive transmission engineering application. This article will also introduce the important technology break-through form Chang An NEV eDrive transmission. Combined with efficiency technology characteristics, market resources and project requirements, the technology bottle neck of eDrvie transmission will be analyzed.



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Floor 3, Building 5, No. 255 Guiqiao Road, Shanghai, China


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