Switching of the comprehensive mode for the hydro-mechanical continuously variable transmission of a tractor

被引：0
|
作者：
Cao F. [1 ,3 ]
Li W. [1 ]
Han Q. [1 ]
Zhang M. [2 ,3 ]
机构：
[1] School of Vehicle and Traffic Engineering, Henan University of Science and Technology, Luoyang
[2] College of Mechatronics Engineering, Henan University of Science and Technology, Luoyang
[3] Henan Province Collaborative Innovation Center for Advanced Manufacturing of Mechanical Equipment, Luoyang
来源：
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | 2022年 / 38卷 / 12期
关键词：
agricultural machinery; hydro-mechanical continuously variable transmission; mode; multi-objective evolutionary algorithm; tractor;
D O I：
10.11975/j.issn.1002-6819.2022.12.005
中图分类号：
学科分类号：
摘要：
This study aims to improve the contradiction between the power and economy of tractor in field operation. A comprehensive mode switching mode was developed for the tractor with the hydro-mechanical continuously variable transmission (HMCVT). The engine torque and fuel consumption model, the HMCVT model, and the tractor dynamic model were built to consider the slip rate of the driving wheel. The economic and dynamic mode switching was introduced the weight coefficient for the power and economy under different working conditions. At the same time, the economic and dynamic speed of mode switching was taken as the constraint of comprehensive mode switching speed. The weight coefficient was solved by the fuzzy reasoning, according to the throttle opening and speed. The multi-objective evolutionary and decomposition were used to optimize the weight coefficient to deal with the comprehensive mode switching speed under different throttle opening. Then, the comprehensive mode switching was worked out. The dynamic and economic performance, as well as the comprehensive mode switching were applied to the mode switching strategy module for the simulation and comparative analysis. The simulation results show that the mode switching speed and the fuel consumption rate of comprehensive mode switching were between the power and economic mode switching under the throttle opening of 0.5, compared with the economic mode switching. The speed of mode switching was reduced under the comprehensive mode switching, indicating the less power loss, and the improved power performance, compared with the dynamic mode switching. There was the lower fuel consumption rate corresponding to the mode switching speed of the comprehensive mode switching, indicating the improved economy. The comprehensive mode switching presented both the power and economic mode switching. The mode switching speed was adjusted in the real time, according to the actual operating conditions of the tractor, indicating a reasonable distribution of power and economy. Meanwhile, the mode switching test was conducted on the experimental bench to verify the accuracy of the comprehensive mode switching, where the throttle opening was set as 0.5. Correspondingly, the simulation data was basically consistent with the experimental data. Therefore, the tractor can be expected to switch the mode, according to the set comprehensive mode switching at high speed and large throttle opening, which verified the effectiveness of the comprehensive mode switching. Therefore, the comprehensive variable speed can fully meet the demand of power performance and economy of tractor under different working conditions. The findings can also provide a theoretical reference to formulate the mode switching in tractors. © 2022 Chinese Society of Agricultural Engineering. All rights reserved.
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页码：41 / 47
页数：6
相关论文
共 21 条
  • [1] Xie Bin, Wu Zhongbin, Mao Enrong, Development status and prospect of key technologies of agricultural tractors, Transactions of the Chinese Society for Agricultural Machinery, 49, 8, pp. 1-17, (2018)
  • [2] Zhang Mingzhu, Wang Jiezhong, Wang Jianhua, Et al., Speed changing control strategy for improving tractor fuel economy, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 36, 1, pp. 82-89, (2020)
  • [3] Zhang Mingzhu, Wang Quansheng, Bai Dongyang, Et al., Speed changing law of hydro-mechanical CVT based on maximum efficiency of tractors, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 32, 21, pp. 74-78, (2016)
  • [4] Zhu Zhen, Wang Dengfeng, Sun Xiaodong, Et al., Configuration analysis of hydro-mechanical composite transmission devices, Journal of Jilin University (Engineering and Technology Edition), pp. 1-12
  • [5] Cao Fuyi, Li Haodi, Yan Xianghai, Et al., Hydro-mechanical compound transmission constant rotational speed output control method under step input based on double feedforward and fuzzy PID, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 35, 1, pp. 72-82, (2019)
  • [6] Cao Fuyi, Wang Yuehang, Feng Qi, Et al., Rolling coordinated control of mode switching for hydro- mechanical transmission device, Journal of Xi'an Jiaotong University, 55, 3, pp. 136-144, (2021)
  • [7] Yang Shujun, Chu Jiehao, Peng Zengxiong, Et al., Online identification method for wheel loader working conditions with hydro-mechanical continuously variable transmission, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 38, 4, pp. 1-11, (2022)
  • [8] Xu Liyou, Zhou Zhili, Zhang Mingzhu, Et al., Reasonable matching of engine and hydro-mechanical continuously variable transmission system of tractor, Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 22, 9, pp. 109-113, (2006)
  • [9] He Ren, Ma Chengguang, Zhang Yong, Et al., Method to determine target speed ratio of CVT based on driving intention, Transactions of the Chinese Society for Agricultural Machinery, 40, 5, pp. 16-20, (2013)
  • [10] Ni Xiangdong, Zhu Sihong, Ouyang Daye, Et al., Design and experiment of hydro-mechanical CVT speed ratio for tractor, Transactions of the Chinese Society for Agricultural Machinery, 44, 4, pp. 16-20, (2013)
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