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Volume 11
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Article

Evaluation of Hydraulic Characteristics of Electrohydraulic Proportional Valve (EHPV) for an Auto-Steering Tractor Application

by
Yi-Seo Min
1,
Yong-Joo Kim
2,3,
Ryu-Gap Lim
4,
Taeyong Sim
5,
Taek-Jin Kim
6,* and
Wan-Soo Kim
1,7,*
1
Department of Bio-Industrial Machinery Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
2
Department of Smart Agriculture Systems, Chungnam National University, Daejeon 34134, Republic of Korea
3
Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
4
Department of Smart Agriculture, Korea Agriculture Technology Promotion Agency, Iksan 54667, Republic of Korea
5
Department of Artificial Intelligence, Sejong University, Seoul 05006, Republic of Korea
6
Department of Drive System Team, TYM R&D Center, Iksan 54576, Republic of Korea
7
Upland Field Machinery Research Center, Kyungpook National University, Daegu 41566, Republic of Korea
*
Authors to whom correspondence should be addressed.
Machines 2023, 11(7), 674; https://doi.org/10.3390/machines11070674
Submission received: 2 June 2023 / Revised: 17 June 2023 / Accepted: 20 June 2023 / Published: 22 June 2023
(This article belongs to the Special Issue Agricultural Machinery and Robotics: Design, Control and Applications)
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Abstract

The performance of the electrohydraulic proportional control valve (EHPV) employed in a tractor’s automatic steering system directly influences the steering performance. To develop a highly reliable EHPV, it is essential to analyze the hydraulic characteristics of the EHPV for several working conditions of tractors. This study aimed to measure and analyze the hydraulic characteristics of the EHPV according to tractor working conditions. The flow rate and pressure data of the EHPV were computed through the valve measuring system, and the required power was computed. The experimental conditions were selected based on engine rotational speed and tractor steering angle. As a result, it was discovered that the flow rate, pressure, and power all increased when the engine rotation speed and steering angle conditions increased. Furthermore, the rates of increase in flow rate, pressure, and power based on the increase in the steering angle were higher than when the engine rotation speed increased. In the regression analysis results between the two variables and the hydraulic characteristics of EHPVs, the steering angle demonstrated a higher correlation than the engine rotation speed. In conclusion, the steering angle and engine rotational speed are the major variables in the hydraulic characteristics of EHPVs, and the influence of the steering angle is greater.
Keywords: agricultural tractor; automatic steering system; electrohydraulic proportional valve; hydraulic characteristic; hydraulic system evaluation agricultural tractor; automatic steering system; electrohydraulic proportional valve; hydraulic characteristic; hydraulic system evaluation

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MDPI and ACS Style

Min, Y.-S.; Kim, Y.-J.; Lim, R.-G.; Sim, T.; Kim, T.-J.; Kim, W.-S. Evaluation of Hydraulic Characteristics of Electrohydraulic Proportional Valve (EHPV) for an Auto-Steering Tractor Application. Machines 2023, 11, 674. https://doi.org/10.3390/machines11070674

AMA Style

Min Y-S, Kim Y-J, Lim R-G, Sim T, Kim T-J, Kim W-S. Evaluation of Hydraulic Characteristics of Electrohydraulic Proportional Valve (EHPV) for an Auto-Steering Tractor Application. Machines. 2023; 11(7):674. https://doi.org/10.3390/machines11070674

Chicago/Turabian Style

Min, Yi-Seo, Yong-Joo Kim, Ryu-Gap Lim, Taeyong Sim, Taek-Jin Kim, and Wan-Soo Kim. 2023. "Evaluation of Hydraulic Characteristics of Electrohydraulic Proportional Valve (EHPV) for an Auto-Steering Tractor Application" Machines 11, no. 7: 674. https://doi.org/10.3390/machines11070674

APA Style

Min, Y.-S., Kim, Y.-J., Lim, R.-G., Sim, T., Kim, T.-J., & Kim, W.-S. (2023). Evaluation of Hydraulic Characteristics of Electrohydraulic Proportional Valve (EHPV) for an Auto-Steering Tractor Application. Machines, 11(7), 674. https://doi.org/10.3390/machines11070674

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