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Energies 2016, 9(3), 220; doi:10.3390/en9030220

Optimization of Shift Schedule for Hybrid Electric Vehicle with Automated Manual Transmission

1
School of Mechanical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China
2
Department of Mechanical Engineering, Politecnico di Milano, via G. La Masa 1, Milano 20156, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Michael Gerard Pecht and Ximing Cheng
Received: 22 January 2016 / Revised: 24 February 2016 / Accepted: 16 March 2016 / Published: 19 March 2016
View Full-Text   |   Download PDF [2930 KB, uploaded 19 March 2016]   |  

Abstract

Currently, most hybrid electric vehicles (HEVs) equipped with automated mechanical transmission (AMT) are implemented with the conventional two-parameter gear shift schedule based on engineering experience. However, this approach cannot take full advantage of hybrid drives. In other words, the powertrain of an HEV is not able to work at the best fuel-economy points during the whole driving profile. To solve this problem, an optimization method of gear shift schedule for HEVs is proposed based on Dynamic Programming (DP) and a corresponding solving algorithm is also put forward. A gear shift schedule that can be employed in real-vehicle is extracted from the obtained optimal gear shift points by DP approach and is optimized based on analysis of the engineering experience in a typical Chinese urban driving cycle. Compared with the conventional two-parameter gear shift schedule in both simulation and real vehicle experiments, the extracted gear shift schedule is proved to clearly improve the fuel economy of the HEV. View Full-Text
Keywords: hybrid electric vehicle (HEV); automated mechanical transmission (AMT); gear shift schedule; dynamic programming (DP) hybrid electric vehicle (HEV); automated mechanical transmission (AMT); gear shift schedule; dynamic programming (DP)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shen, W.; Yu, H.; Hu, Y.; Xi, J. Optimization of Shift Schedule for Hybrid Electric Vehicle with Automated Manual Transmission. Energies 2016, 9, 220.

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