Abstract The cone index (CI), as an indicator of the soil strength, is closely related to the traction performance of tractors. This study evaluates the traction performance of a tractor in terms of the CI during tillage. To analyze the traction performance, a field site was selected and divided into grids, and the CI values at each grid were measured. The CI maps of the field sites were created using the measured CI. The traction performance was analyzed using the measured traction load. The traction performance was grouped at CI intervals of 400 kPa to classify it in terms of the CI. When the CI decreased, the engine speed and tractive efficiency (TE) decreased, while the engine torque, slip ratio, axle torque, traction force, and dynamic traction ratio (DTR) increased. Moreover, the DTR increased up to approximately 13%, and the TE decreased up to 9%. The maximum TE in the DTR range of 0.45–0.55 was higher than approximately 80% for CI values above 1500 kPa. The DTR and TE results obtained in terms of the CI can help efficiently design tractors considering the soil environmental conditions.

中文翻译：

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基于锥度指数图的78kW级农用拖拉机在韩国稻田牵引性能评价

摘要 锥度指数（CI）作为土壤强度的指标，与拖拉机的牵引性能密切相关。本研究根据耕作期间的 CI 评估拖拉机的牵引性能。为了分析牵引性能，选择了一个现场站点并将其划分为网格，并测量每个网格的 CI 值。现场站点的 CI 地图是使用测量的 CI 创建的。使用测量的牵引载荷分析牵引性能。牵引性能以 400 kPa 的 CI 间隔分组，以根据 CI 对其进行分类。当 CI 降低时，发动机转速和牵引效率 (TE) 降低，而发动机扭矩、滑移比、轴扭矩、牵引力和动态牵引比 (DTR) 增加。此外，DTR 增加了约 13%，TE 下降了 9%。对于 1500 kPa 以上的 CI 值，DTR 范围内 0.45-0.55 的最大 TE 高于约 80%。根据 CI 获得的 DTR 和 TE 结果可以帮助有效地设计考虑土壤环境条件的拖拉机。