Design and application of electric oil pump in automatic transmission for efficiency improvement and start–stop function

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• 作者：Yan-fang Liu 刘艳舿/a> ; Peng Dong 董鹏 ; Yang Liu 刘洋…
• 关键词：automatic transmission ; electric oil pump ; mechanical oil pump ; start–stop function ; efficiency improvement ; forward driving simulation ; control strategy
• 刊名：Journal of Central South University
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：23
• 期：3
• 页码：570-580
• 全文大小：3,904 KB
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• 作者单位：Yan-fang Liu 刘艳芳 (1) (2)
  Peng Dong 董鹏 (1) (2) (3)
  Yang Liu 刘洋 (1) (2)
  Xiang-yang Xu 徐向阳 (1) (2)
  
  1. Department of Automotive Engineering, School of Transportation Science and Engineering, Beihang University, Beijing, 100191, China
  2. Beijing Key Laboratory for High-efficient Power Transmission and System Control of New Energy Resource Vehicle, Beihang University, Beijing, 100191, China
  3. Institute of Industrial and Automotive Drivetrain, Department of Mechanical Engineering, Ruhr-University Bochum, Bochum, 44801, Germany
  
• 刊物类别：Engineering
• 刊物主题：Engineering, general
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Central South University, co-published with Springer
• ISSN：2227-5223

文摘

For the purpose of improving efficiency and realizing start–stop function, an electric oil pump (EOP) is integrated into an 8-speed automatic transmission (AT). A mathematical model is built to calculate the transmission power loss and the hydraulic system leakage. Based on this model, a flow-based control strategy is developed for EOP to satisfy the system flow requirement. This control strategy is verified through the forward driving simulation. The results indicate that there is a best combination for the size of mechanical oil pump (MOP) and EOP in terms of minimum energy consumption. In order to get a quick and smooth starting process, control strategies of the EOP and the on-coming clutch are proposed. The test environment on a prototype vehicle is built to verify the feasibility of the integrated EOP and its control strategies. The results show that the selected EOP can satisfy the flow requirement and a quick and smooth starting performance is achieved in the start–stop function. This research has a high value for the forward design of EOP in automatic transmissions with respect to efficiency improvement and start–stop function.