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http://dx.doi.org/10.17661/jkiiect.2022.15.5.349

Analysis of dynamic characteristics of proportional control valve for auto-steering tractor  

Min, Yee-Seo (Department of Bio-Industrial Machinery Engineering, Kyungpook National University)
Kim, Yong-Joo (Department of Biosystems Machinery Engineering & Department of Smart Agriculture Systems, Chungnam National University)
Kim, Wan-Soo (Department of Bio-Industrial Machinery Engineering, Kyungpook National University)
Publication Information
The Journal of Korea Institute of Information, Electronics, and Communication Technology / v.15, no.5, 2022 , pp. 349-359 More about this Journal
Abstract
The aim of this study is to analyze the dynamic characteristics of proportional control valves according to various working conditions as a basic study for developing proportional control valves for auto-steering tractors. The dynamic characteristics of proportional valves were measured using hydraulic characteristics measurement system, and the power was analyzed using measured flow rate and pressure data. As the experimental conditions, the tractor engine speed and steering angle was selected as the main variables, and the experiment was performed on urethane road conditions. As a result, it was found that the flow rate, pressure, and power of the proportional control valve increased as the tractor engine speed and steering angle increased. In particular, as the steering angle increased at the same engine speed, the flow rate, pressure, and power tended to increase by up to 190%, 172%, and 273%, respectively. Similarly, as the engine speed increased at the same steering angle, the flow rate, pressure, and power tended to increase up to 161%, 122%, and 168%, respectively. Therefore, it can be seen that the steering angle has a higher influence on the dynamic characteristics of the proportional control valve than the engine speed.
Keywords
Agricultural tractor; Steering system; Proportional control valve; Flow rate; Hydraulic power; Pressure;
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