트랙터 전동라인의 전동효율 특성 분석 = Characteristics of Power Efficiency of Tractor Driveline

다국어 초록 (Multilingual Abstract)

According to a field test, power transmission efficiency of a tractor drive line varied from 56 to 86% with a mean value of 72.5%, an indication that a constant efficiency model used commonly for the simulation of a power drive line performance may not properly represent the variability. In order to simulate the actual power transmission efficiency, enw concepts of a maximum efficiency and a drag torque were introduced and a new model based on these concepts was proposed. The model involves two components, one of which varies continuously with workload and the other is a constant representing power loss by the drag torque regardless of the workload. The power loss by the drag torque, about 61% of the entire power loss occurring during the transporting operation must be considered in the evaluation of power efficiency of tractor drive lines. The power transmission effieicney predicted by the model agreed well with the experimentally determined one within a 2.3% difference in average. Although more experimental data are required before the model could be used practically, th concepts of a maximum efficiency and a drag torque must be taken into consideration for a better understanding of the power drive line performance of tractors.