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직접 제어 방식을 적용한 소형 지게차 변속 시스템에 관한 연구

A Study on Applying the Direct Control Method for Small Forklift Transmission System

  • Jeong, Y.M. (Department Mechanical Automotive Engineering Graduate School of University of Ulsan) ;
  • Lim, K. (Department Mechanical Engineering Graduate School of University of Daegu) ;
  • Yang, S.Y. (School of Mechanical Engineering, University of Ulsan)
  • 투고 : 2013.11.05
  • 심사 : 2013.11.29
  • 발행 : 2013.12.01

초록

The transmission control method of small forklift is classified into pilot control method and direct control method. In pilot control method, the hydraulic circuit which consists a lot of components is very complex so the production process is too costly and time consuming. The direct control method contains fewer components that can be configured to simple hydraulic circuit. It has more advantages because the shift sensitivity of transmission is changed easily via the input profile. In this paper, the controller design and the input profile for system are studied to apply to the direct control method. The input profile consists of Fill section, Hold section and Ramp section. The characteristic of each section is obtained through experiment. As the result, the shift sensitivity and starting performance are effected by Fill section and Hold section.

키워드

참고문헌

  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

피인용 문헌

  1. Modeling and Performance Investigation of Forklift Transmission Control Valve System vol.11, pp.3, 2014, https://doi.org/10.7839/ksfc.2014.11.3.001
  2. A Study on Simulation of Shift Sensitivity of Small Forklift Transmission using Direct Control Method vol.11, pp.4, 2014, https://doi.org/10.7839/ksfc.2014.11.4.008