PTO Torque and Draft Analyses of an Integrated Tractor-Mounted Implement for Round Ridge Preparation

Koo, Young-Mo

doi:10.1007/s42853-022-00146-w

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…To analyze the effect of engine rotational speed and steering angle on the hydraulic characteristics of the tractor hydraulic system, a one-way analysis of variance (ANOVA) and post hoc analysis employing least significant difference (LSD) were carried out using IBM SPSS Statistics (SPSS 25, SPSS Inc., New York, NY, USA). The analysis approach referred to prior research [24]. Two groups were judged to display statistically significant differences when p < 0.05 was satisfied.…”

Section: Data Analysis Methodsmentioning

confidence: 99%

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

Min

Kim

Lim³

et al. 2023

Machines

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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.

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Section: Data Analysis Methodsmentioning

confidence: 99%

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

Min

Kim

Lim³

et al. 2023

Machines

View full text Add to dashboard Cite

show abstract

“…Modern agriculture is highly specialized and mechanized, and the agricultural workforce is decreasing as rural populations decline and age. As a result, the use of a tractor that can be equipped with a variety of agricultural implements to increase the labor force is becoming more common [1].…”

Section: Introductionmentioning

confidence: 99%

Development of a Modified Method for Measuring the Actual Draft Force Using a Tractor-Attached Dynamometer

Kim,

Lee,

Kim

et al. 2024

Agriculture

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In this study, crank-locker kinematic equations were used to analyze the three-point hitch behavior when the dynamometer was connected to the work machine. The dynamometer was statically tested with a hydraulic actuator, and the accuracy of the three-way force and the moment was confirmed to be 96–99%. The calibrated dynamometer was put to the test on a real farm field, and data were collected using a data acquisition system. Using the transport pitch correction equation, the collected data can be transformed into more realistic data. International standards were used to determine the point of connection between the tractor, dynamometer, and implement. The results of this study made it possible to accurately measure force and moment, which will have an important role in future agricultural technologies such as autonomous agricultural operation.

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“…Tractors are mainly operated in soil conditions, and the tractor's load (i.e., the LF) varies greatly depending on the soil conditions [15,16]. Numerous previous studies have indicated that the engine load differs depending on the soil physical properties.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Soil Physical Properties on the Load Factor for Agricultural Tractors in Different Paddy Fields

Min,

Kim,

Lim

et al. 2023

Agriculture

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The load factor (LF) of a tractor represents the ratio of actual engine power and rated engine power, and is an important indicator directly used in calculating national air pollutant emissions. Currently, in the Republic of Korea, a fixed value of 0.48 is used for the LF regardless of the working conditions, making it difficult to establish a reliable national air pollutant inventory. Since tractors perform work under soil conditions, soil physical properties directly affect the tractor LF. Therefore, it is expected that more accurate LF estimation will be possible by utilizing soil physical properties. This study was conducted to assess the impact of soil physical properties on the LF. Experimental data were collected in ten different soil conditions. Correlation analysis revealed that the LF exhibited strong correlations with SMC, soil texture, and CI, in that order. The coefficient of determination for the regression model developed using soil variables ranged from 0.678 to 0.926. The developed regression models generally showed higher accuracy when utilizing multiple soil variables, as compared to using a single soil variable. Therefore, an effective estimation of the LF through non-experimental methods can be achieved by measuring various soil properties.

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PTO Torque and Draft Analyses of an Integrated Tractor-Mounted Implement for Round Ridge Preparation

Cited by 7 publications

References 25 publications

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

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

Development of a Modified Method for Measuring the Actual Draft Force Using a Tractor-Attached Dynamometer

The Influence of Soil Physical Properties on the Load Factor for Agricultural Tractors in Different Paddy Fields

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