Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Transmission Efficiency of Dual-clutch Transmission in Agricultural Tractors

농업용 트랙터 듀얼 클러치 변속기의 동력전달 효율 분석에 관한 연구

  • Moon, Seok Pyo (Department of Smart Agriculture System, Chungnam national university) ;
  • Moon, Sang Gon (Department of Smart Industrial Machinery, Korea Institute of Machinery & Materials) ;
  • Kim, Jae Seung (Department of Smart Industrial Machinery, Korea Institute of Machinery & Materials) ;
  • Sohn, Jong Hyeon (Department of Smart Industrial Machinery, Korea Institute of Machinery & Materials) ;
  • Kim, Yong Joo (Department of Smart Agriculture System, Chungnam national university) ;
  • Kim, Su Chul (Department of Smart Industrial Machinery, Korea Institute of Machinery & Materials)
  • Received : 2022.01.06
  • Accepted : 2022.02.15
  • Published : 2022.03.01
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Abstract

The aim of this study was to conduct basic research on the development of a dual-clutch transmission(DCT) and automatic transmission for agricultural tractors. The DCT layout and the DCT simulation model were developed using commercial software. Power transmission efficiency of the DCT and component power loss were analyzed to verify the developed simulation model. Power loss analysis of the components was conducted according to previous studies and ISO(International Organization for Standardization) standards. The power transmission efficiency of the DCT simulation model was 68.4-91.5% according to the gear range. The power loss in the gear, bearing, and clutch DCT system components was 0.75-1.49 kW, 0.77-2.99 kW, and 5.24-10.52 kW, respectively. The developed simulation model not include the rear axle, differential gear, final reduction gear. Therefore actual power transmission efficiency of DCT will be decreased. In a future study, an actual DCT can be developed through the simulation model in this study, and optimization design of DCT can be possible by comparing simulation results and actual vehicle test.

Keywords

Acknowledgement

이 연구는 2021년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구임('20011428')

References

  1. Y. S. Nam, "Simulation of Hydraulic Control of Powershift Transmission for Agricultural Tractors," A Thesis for a Doctorate, Seoul National University, Republic of Korea, 2002.
  2. K. J. Park et al., "Prediction of Mechanical and Spin Power Losses of a Parallel-Axis Geartrain in an Automobile Transmission," Transactions of KSAE, Vol.26, No.1, pp.120-130
  3. C. H. Choi et al., "Development of Electric Actuator Position Control System for Automatic Shuttle Shifting of Tractor," Journal of Biosystems Engineering, Vol.35, No.4, pp.224-230, 2010. https://doi.org/10.5307/JBE.2010.35.4.224
  4. E. Galvagno, M. Velardocchia and A. Vigliani, "Dynamic and Kinematic Model of a Dual Clutch Transmission," Mechanism and Machine Theory Vol.46, No.6, pp.794-805, 2011. https://doi.org/10.1016/j.mechmachtheory.2011.01.013
  5. J. C. Cho et al., "Characteristic Dynamics Torque Vibration of Behavior in Wet Clutch Engagement for Dual Clutch Transmissions," Transacetions of KSAE, Vol.24, No.2 pp.183-190, 2016. https://doi.org/10.7467/KSAE.2016.24.2.183
  6. J. J. Oh, S. B. Choi and J. S. Kim, "Driveline Modeling and Estimation of Individual Clutch Torque during Gear Shifts for Dual Clutch Transmission," Mechatronics Vol.24, No.5, pp.449-463, 2014. https://doi.org/10.1016/j.mechatronics.2014.04.005
  7. W. J. Kim, S. H. Lee and S. Y. Jang, "Study on the Lubricant Flow Behaviors in the Wet Clutch Pack System of Dual Clutch Transmission," Journal of the Korean Society of Tribologists & Lubrication Engineers Vol.33, No.3, pp.85-91, 2017. https://doi.org/10.9725/kstle.2017.33.3.85
  8. J. H. Cho et al., "A Study on the Wet Clutch Pattern Design for the Drag Torque Reduction in Wet DCT System," Journal of the Korean Society of Tribology & Lubrication Engineers Vol.33, No.2, pp.71-78, 2017. https://doi.org/10.9725/kstle.2017.33.2.71
  9. S. U. Park, M. H. Bae and S. K. Choi, "Development of Hydro-Mechanical Continuously variable Transmission for Forklift," Journal of Drive and Control, Vol. 15, No. 1, pp.61-69, 2018. https://doi.org/10.7839/KSFC.2018.15.4.061
  10. S. C. Kim et al., "Macro Geometry Optimization of a Helical Gear Pair for Mass, Efficiency, and Transmission Error," Mechanism and Machine Theory 144, 103634, 2020. Control of Electromagnetic Actuators for Variable Train," SAE Paper 2000-01-1225, pp. 325-423, 2000.
  11. ISO 14179, "Part 1: Rating Gear Drives with Thermal Equilibrium at 95℃ Sump Temperature", 2001
  12. T. A. Harris and M. N. Kotzalas, "Rolling Bearing Analysis-Essential Concepts of Bearing Technology," 5th Edm., Taylor & Francis, Boca Raton, 2007.
  13. S. C. Kim, "Drag Torque and Heat Transfer Models of Multi-plate Wet Clutch," Journal of Drive and Control, Vol. 17, No. 1, pp.76-80, 2020.
  14. S. Iqbal, F. Al-Bender, B. Pluymers and W. Desmet, "Mathematical Model and Experimental Evaluation of Drag Torque in Disengaged Wet Clutches," ISRN Tribology, Vol.2013, Article ID 206539, 2013.
  15. K. J. Park et. al., "Development of an Analysis Program to Predict Efficiency of Automotive Power Transmission and Its Application," SAE Technical Paper, 2018-01-0398, 2018.