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Characteristics Analysis of Automatic Transmission for the Wheel-Loader with Shift Control Algorithm  

Oh, Joo-Young (한양대학교 대학원 기계설계.메카트로닉스공학과)
Yun, Ung-Kwon (로보티즈(주))
Park, Young-Jun (한국기계연구원 시스템엔지니어링 연구본부)
Lee, Geun-Ho (한국기계연구원 시스템엔지니어링 연구본부)
Song, Chang-Seop (한양대학교 기계공학부)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.20, no.5, 2011 , pp. 639-645 More about this Journal
Abstract
Wheel-loader is a construction vehicle for uploading soil or sand into truck and transportation of materials, which requires large driving power and high rotational speed. To improve the working efficiency, the operator has to shift gears and control levers for bucket & boom simultaneously. Therefore, the automatic transmission has been introduced to enhance operator's convenience and enable effective operation. To develop the automatic transmission for the wheel-loader, technologies such as gears and a clutch-pack design and shift algorithm are required for improvement of shift quality. In this paper, the shift algorithm for the wheel-loader was developed and its shift pattern was analyzed. As the shift control is affected by the pressure profile for the clutch control, the shift quality depending on the pressure profile has been evaluated using experiment and simulation model analysis.
Keywords
Wheel-loader; Automatic transmission; Clutch control pressure profile; Shift pattern; Shift control algorithm;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Yun, U. K., 2008, Analysis of the Wheel Loader Powertrain System Applied by Shift Control Algorithm, A Thesis for a Degree of Master, Hanyang University, Republic of Korea.
2 Oh, J. Y., and Song, C. S., 2009, "Development of Automatic Transmission Model of Wheel-loader for Hardware in the Loop Simulation," Journal of The Research Institute of Industrial Sciences, Vol. 58, No. 1, pp. 59-65.
3 Hyundai-motor, 1995, Design Theory of Automatic Transmission, Hyundai-motor Press.
4 Oh, J. Y., Lee, G. H., and Song, C. S., 2009, "The Hydraulic System Modeling and Analysis of the Clutch Direct Control of an Automatic Transmission for a Forklift Truck," KSPE, Vol. 26, No. 1, pp. 112 -119.
5 Kwon, S. K., Choi, S. Y., Kwon, G. R., and Han, S. W.,2009, "Shifting Control Method for Automatic Transmission of PSD-Axle Forklift", Journal of the Korean Society of Machine Tool Engineers, Vol. 18, No. 6, pp. 565-575.
6 Kim, D. G., Park, H., and Kang, S. I., 2004, "A Study on the Shifting Shock of the Automatic Transmission in Tracked Vehicles," Transactions of the Korean Society of Machine Tool Engineers, Vol. 13, No. 1, pp. 100-106.
7 MSC. Easy5, 2002, Ricardo Powertrain Library User Guide, MSC.software.
8 Yun, U. K., Lee, G. H., Lee, J. H., Jung, G. H., and Song, C. S., 2007, "The Shift Control Algorithm Modeling and Analysis of Automatic Transmission for Wheel Loader," Proc. of KSPE Spring Conference, pp. 131-132.
9 Jung, G. H., Shin, S. H., Lee, S. I., and Kim, H. J., 2006, "A Development of TCU Analyzer for Wheel Loader Automatic Transmission," Proc. of KSAE Autumn Conference, pp. 1405-1410.