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2024 Vol.51, Issue 2 Preview Page

Engineering

Evaluation of gear reduction ratio for a 1.6 kW multi-purpose agricultural electric vehicle platform based on the workload data
Mohammod Ali12
,
Md Rejaul Karim1
,
Habineza Eliezel2
,
Md Ashrafuzzaman Gulandaz2
,
Md Razob Ali1
,
Hyun-Seok Lee3
,
Sun-Ok Chung12†*
,
Soon Jung Hong4†*
1Department of Agricultural Machinery Engineering, Graduate School, Chungnam National University, Daejeon 34134, Korea
2Department of Smart Agricultural Systems, Graduate School, Chungnam National University, Daejeon 34134, Korea
3SB Industry Co., Ltd., Cheonan 31002, Korea
4Department of Liberal Arts, Korea National University of Agriculture and Fisheries, Jeonju 54874, Korea
*Corresponding Author
*Corresponding Author
†These authors equally contributed to this study as corresponding author.
1 June 2024. pp. 133-146
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Abstract

Selection of gear reduction ratio is essential for machine design to ensure suitable power and speed during agricultural operations. The goal of the study was to evaluate the gear reduction ratio for a 1.6 kW four-wheel-drive (4WD) multi-purpose agricultural electric vehicle platform using workload data under different off-road conditions. A data acquisition system was fabricated to collect workload (torque) of the vehicle acting on the gear shaft. Field tests were performed under three driving surfaces (asphalt, concrete, and grassland), payload operations (981, 2,942, and 4,903 N), and slope conditions (0 - 4°, 4 - 8°, and 8 - 12°), respectively. Commercial speed reduction gear phases were attached to the input shaft of the vehicle powertrain. The maximum required torque was recorded as 37.5 Nm at a 4,903 N load with 8 - 12° slope levels, and the minimum torque was 12.32 Nm at 0 - 4° slope levels with a 981 Nm load for a 4 km/h speed on asphalt, concrete, and grassland roads. Based on the operating load condition and motor torque and rotational speed (TN) curve, the minimum and maximum gear reduction ratios were chosen as 1 : 50 and 1 : 64, respectively. The selected motor satisfied power requirements by meeting all working torque criteria with the gear reduction ratios. The chosen motor with a gear reduction ratio of 1 : 50 was suitable to fit with the motor T-N curve, and produced the maximum speeds and loads needed for driving and off-road activities. The findings of the study would assist in choosing a suitable gear reduction ratio for electric vehicle multi-purpose field operations.

Keywords
agricultural vehicle platform
electric vehicle
gear reduction ratio
load analysis
off-road condition
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Information
  • Publisher :Institute of Agricultural Science, Chungnam National University
  • Publisher(Ko) :충남대학교 농업과학연구소
  • Journal Title :Korean Journal of Agricultural Science
  • Journal Title(Ko) :농업과학연구
  • Volume : 51
  • No :2
  • Pages :133-146
  • Received Date : 2024-01-03
  • Revised Date : 2024-03-29
  • Accepted Date : 2024-03-31
  • DOI :https://doi.org/10.7744/kjoas.510204
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