• ISSN 0258-2724
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Volume 27 Issue 6
Dec.  2014
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Journal of Southwest Jiaotong University  > 2014  >  27(6): 1078-1083.
HAN Ling, ZHANG Libin, AN Ying, ANWAR Sohel. Electric-Hydraulic System for Continuously Variable Transmission: Test Analysis and Fault Detection[J]. Journal of Southwest Jiaotong University, 2014, 27(6): 1078-1083. doi: 10.3969/j.issn.0258-2724.2014.06.021
Citation: HAN Ling, ZHANG Libin, AN Ying, ANWAR Sohel. Electric-Hydraulic System for Continuously Variable Transmission: Test Analysis and Fault Detection[J]. Journal of Southwest Jiaotong University, 2014, 27(6): 1078-1083. doi: 10.3969/j.issn.0258-2724.2014.06.021
shu

Electric-Hydraulic System for Continuously Variable Transmission: Test Analysis and Fault Detection

doi: 10.3969/j.issn.0258-2724.2014.06.021
  • Received Date: 24 Dec 2013
  • Publish Date: 25 Dec 2014
    Abstract
  • To determine if the performance of the electro hydraulic control module for continuously variable transmission could match the national standards of China, the stress level, pressure regulating curve, repeat accuracy, and speed of step response of the electro-hydraulic control module were analyzed by the hydraulic pressure control principle and Matlab simulation method. An exclusive test system for the hydraulic control module was developed after establishment of a test bench and integral vehicle tests. In the meantime, early faults of the CVT parts were positioned by calculation of the metallic element concentration in the hydraulic oil, using the oil spectrum analysis and immune algorithm. Test results show that the speed ratio of the electro-hydraulic module, the accuracy and speed of pressure tracking, and the thermal equilibrium flow all meet the national standards and the positioning accuracy of the fault parts is above 95.3%.

     

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