Look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmission
Look-ahead information has been applied to vehicle shift systems and has led to the development of innovative changes in shifting strategies. A shifting strategy significantly influences the dynamic and economic performance of a truck. If a shift control system can predict the information of the roa...
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Series: | Advances in Mechanical Engineering |
Online Access: | https://doi.org/10.1177/1687814018822911 |
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doaj-92ae8728ede5479b8d5dc17fc42acaae2020-11-25T02:52:30ZengSAGE PublishingAdvances in Mechanical Engineering1687-81402019-01-011110.1177/1687814018822911Look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmissionXiao-yan Cong0Yong-gang Zhang1Chun-peng Wang2Hong-xuan Zhu3Zeng-cai Wang4School of Art and Design, Qingdao University of Technology, Qingdao, ChinaResearch & Development Center, China National Heavy Duty Truck Group Co., Ltd., Jinan, ChinaSchool of Art and Design, Qingdao University of Technology, Qingdao, ChinaSchool of Art and Design, Qingdao University of Technology, Qingdao, ChinaKey Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong University, Jinan, ChinaLook-ahead information has been applied to vehicle shift systems and has led to the development of innovative changes in shifting strategies. A shifting strategy significantly influences the dynamic and economic performance of a truck. If a shift control system can predict the information of the road ahead, then the dynamic programming method can be used to obtain an optimal shift schedule, thereby achieving the best balance between the dynamic and the economic performance of a truck. Determining the weights of the economic and dynamic performance of a truck is critical in dynamic programming. Weight is related to road slope value; hence, this study uses different weights on 3%, 5%, and 10% ramp simulation experiments to investigate the relationship between fuel consumption and running time and to determine the optimum weight for different slopes. On the basis of the optimal shift schedule obtained via dynamic programming, the ramp information of the road ahead can be utilized to adjust the shift point to avoid unnecessary shifting before entering the slope and reduce shift times on a ramp. An actual truck test shows that the anthropomorphic shifting strategy proposed in this study meets driver expectations and is conducive to the ramp driving of trucks with automated manual transmission.https://doi.org/10.1177/1687814018822911 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiao-yan Cong Yong-gang Zhang Chun-peng Wang Hong-xuan Zhu Zeng-cai Wang |
spellingShingle |
Xiao-yan Cong Yong-gang Zhang Chun-peng Wang Hong-xuan Zhu Zeng-cai Wang Look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmission Advances in Mechanical Engineering |
author_facet |
Xiao-yan Cong Yong-gang Zhang Chun-peng Wang Hong-xuan Zhu Zeng-cai Wang |
author_sort |
Xiao-yan Cong |
title |
Look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmission |
title_short |
Look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmission |
title_full |
Look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmission |
title_fullStr |
Look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmission |
title_full_unstemmed |
Look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmission |
title_sort |
look-ahead gear-shifting strategy on ramps for heavy trucks with automated mechanical transmission |
publisher |
SAGE Publishing |
series |
Advances in Mechanical Engineering |
issn |
1687-8140 |
publishDate |
2019-01-01 |
description |
Look-ahead information has been applied to vehicle shift systems and has led to the development of innovative changes in shifting strategies. A shifting strategy significantly influences the dynamic and economic performance of a truck. If a shift control system can predict the information of the road ahead, then the dynamic programming method can be used to obtain an optimal shift schedule, thereby achieving the best balance between the dynamic and the economic performance of a truck. Determining the weights of the economic and dynamic performance of a truck is critical in dynamic programming. Weight is related to road slope value; hence, this study uses different weights on 3%, 5%, and 10% ramp simulation experiments to investigate the relationship between fuel consumption and running time and to determine the optimum weight for different slopes. On the basis of the optimal shift schedule obtained via dynamic programming, the ramp information of the road ahead can be utilized to adjust the shift point to avoid unnecessary shifting before entering the slope and reduce shift times on a ramp. An actual truck test shows that the anthropomorphic shifting strategy proposed in this study meets driver expectations and is conducive to the ramp driving of trucks with automated manual transmission. |
url |
https://doi.org/10.1177/1687814018822911 |
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