Mass of agricultural tractors available in the brazilian market

Abstract

Currently, manufacturers of agricultural tractors offer to farmers a diversity of brands, models, and settings for the most diverse agricultural operations. In this sense, the relation mass/power of tractor influences directly in the performance

Agricultural tractor performance with different wheel and tire configurations

“…Wherein: Aeli is the contact area of the tire with the soil (cm²), b is the width of the ellipse (cm), L is the length of the ellipse (cm), and β is the ellipticity coefficient (π/4). Mass-power ratios were established based on the study carried out by Estrada et al (2016); obtained by means of various weighing procedures in a portable scale, Toledo brand, model BPV-830, with capacity for 294.30 kN (30,000 kg). To reach the three levels of mass-power ratio, the quantities and the positioning of the metallic masses (ballasts) of the test tractor were changed, considering about 40% total mass on the front axle and 60% on the rear axle.…”

“…Tractor mass directly influences field performance (Márquez, 1990), being an important parameter to define the aptitude to perform certain tasks (Biondi et al, 1996;Linares et al, 2006). In addition to engine power and transmission system efficiency, the agricultural tractor is characterized by its size and mass (Estrada et al, 2016). Over the years, tractors have become lighter, and the mass-power ratio has been reduced, making these machines increasingly dependent on ballast performance (Schlosser et al, 2005).…”