Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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A Study on Simulation of Shift Sensitivity of Small Forklift Transmission using Direct Control Method

직접제어 방식을 이용한 소형 지게차 변속감도 시뮬레이션에 관한 연구

  • Jeong, Y.M. (Department Mechanical Automotive Engineering Graduate School of University of Ulsan) ;
  • Yang, S.Y. (School of Mechanical Engineering, University of Ulsan)
  • Received : 2014.08.12
  • Accepted : 2014.10.18
  • Published : 2014.12.01
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Abstract

The transmission control method of a small forklift is classified into a pilot control method and a direct control method. In the pilot control method, the complex hydraulic circuit consists of many components, making the production process too costly and time consuming. The direct control method contains fewer components that can be configured to simple hydraulic circuits. As another advantage, the input profile easily changes the shift sensitivity of the transmission. Therefore, this research considers the characteristics of the direct control method in the development of hydraulic system design. This paper will present a simulation of the direct control transmission using AMESim. First, modeling of the direct control method is obtained and simulated with real parameters. The simulation results then are carried out and compared with the experimental results to verify and analyze the characteristics of the direct control method.

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References

  1. C. S. Jeong, K. D. Kim, H. O. Lee, C. D. Lee, S. Y. Yang, "A Study on Prediction for Modulation Performance os Power Shift Transmission of Mini Forklift Truck", KSFC spring Conference, pp.39-43, 2008
  2. H. K. Jang, D. Y. Kook, J. K. Lee, J. H. Choi, "Development of Start Feel Index of a Forklift Truck", KSME, Vol 26, No. 1, pp.74-82, 2002 https://doi.org/10.3795/KSME-A.2002.26.1.074
  3. J. Y. Oh, G. H. Lee, C. H. Jung, "The Hydraulic System Modeling and Analysis of the Automatic Transmission using Clutch Direct Control for Forklift Truck", KSFC Fall Conference, pp.70-75, 2007
  4. H. Y. Kim, C. S. Lee, Y. W. Jeong, "A Study on Modulation of Forklift Transmission and Improvement of Inching Performance", Pusan university report, pp.9-48, 2005
  5. J. Y. Oh, G. S. Kim, J. H. Lee, K. G. Hwang, S. H. Lee, "Clutch Hydraulic System Modeling and Analysis using Direct Type Control for Automatic Transmission of Forklift Truck", KSPE Spring Conference, pp.885-890, 2006
  6. S. N. Yun, Y. H. Choi Y. B. Ham, K. Y. Kim, "Characteristics Analysis of Pilot Operated Pressure Control Valve" KSPE Spring Conference, pp.725-728, 2002
  7. B. H. Kwon, S. B. Kim, H. S. Kim, "Modeling of a Clutch to Clutch Controlled Automatic Transmission and Simulation Tool for Prediction of Shift Quality", KSAE Spring Conference, pp.431-436, 2000
  8. Y. M. Jeong, C. S. Jeong, S. Y. Yang, "A Study on Development of Proportional Control Valve System for Small Forklift", KSFC Spring Conference, pp.105-108, 2012
  9. H. G. Jang, D. Y. Kuk, J. G. Lee, J. H. Choi, "Development of Start Fell Index of a Forklift Truck", KSNVE Spring Conference, pp.1094-1099, 2001
  10. Y. M. Jeong, K. Lim, S. Y. Yang, "A Study on Applying the Direct Control Method for Small Forklift Transmission System", KSFC, Vol 10, No. 4, pp. 34-40, 2013 https://doi.org/10.7839/ksfc.2013.10.4.034