吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (3): 819-826.doi: 10.13229/j.cnki.jdxbgxb201703018

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Shifting strategy of digital hydraulic transmission system for wheel loader

WANG Li1, 2, 3, LIU Xin-hui1, 2, WANG Xin1, 2, CHEN Jin-shi1, 2, LIANG Yi-jie1, 2   

  1. 1.School of Mechanical Science and Engineering, Jilin University, Changchun 130022,China;
    2.State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022,China;
    3.Department of Mechanical and Automotive Engineering, Zhuhai College of Jilin University, Zhuhai 519041, China
  • Received:2016-04-13 Online:2017-05-20 Published:2017-05-20

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Abstract: In order to solve the problems of low efficiency and high cost of the existing hydraulic transmission of wheel loader, a digital controlled hydraulic transmission (DHST) scheme of fixed step ratio automotive transmission was proposed based on digital hydraulic components and their control technology. To ensure the engine work steadily in the economic region, combined with the shovel operating condition of the wheel loader, fuzzy shift control strategies of the digital pumps and motors displacement were designed to realize the dynamic optimal matching between the combustion engine and the digital pumps, digital motors and the changing load. The feasibility of the scheme was verified by AMESim simulation. This research provides a new design concept for the wheel loader transmission system, and it has certain reference significance for the design of other mechanical transmission system.

Key words: turn and control of fluid, digital hydraulic, hydrostatic transmission, fixed step ratio automotive transmission, fuzzy control

CLC Number: 

  • TH137
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