Traction

Liljedahl, J. B.; Turnquist, Paul K.; Smith, David W.; Hoki, Makoto

doi:10.1007/978-1-4684-6632-4_10

Cited by 2 publications

(4 citation statements)

References 12 publications

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“…This loaded tyre will compact the soil until both opposing forces balance out. More significant soil deformation (sinkage) will increase rolling resistance and therefore the amount of energy wasted in compacting the soil, which could, otherwise, be used for developing traction [20][21][22]. The net result is a concurrent reduction in fuel-use efficiency [23].…”

Section: Introductionmentioning

confidence: 99%

Tyre Configuration and Axle Load of Front-Wheel Assist and Four-Wheel Drive Tractors Effects on Soil Compaction and Rolling Resistance under No-Tillage

et al. 2022

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Selecting the appropriate tyre configuration and settings for heavy farm vehicles is important to ensure that soil compaction and power loss in rolling resistance are minimised and traction is optimised. This study investigated the effect of front-wheel assist (FWA, ≈75 kN) and four-wheel drive (4 WD, ≈100 kN) tractors fitted with different tyre configurations (single, dual), tyre sizes and inflation pressures on soil strength (a proxy for soil compaction), and rolling resistance. Single-pass tests were performed on a Typic Argiudoll (≈23% clay, bulk density: 1305 kg m−3) managed under permanent no-tillage. Results showed that average power losses in rolling resistance were 7.5 kN and 5 kN for the 4 WD and FWA tractors, respectively. The average rut depth increased by approximately 1.4 times after a pass of the 4 WD compared with the FWA tractor. The soil cone index (0–600 mm depth) increased from 2023 kPa (before traffic) to 2188 and 2435 kPa after single passes of the FWA and 4WD tractors, respectively (p < 0.05). At the centreline of the tyre rut, dual tyres reduced the soil cone index a little compared with single tyres, but they significantly increased the volume of soil over which soil strength, and therefore soil compaction, was increased. For both tractors (regardless of tyre configuration or settings), soil strength increased to the full measured depth (600 mm), but relative changes before vs. after traffic became progressively smaller with increased soil depth. The power loss in rolling resistance was consistently greater with the heavier tractor, and rut depth was directly related to tyre inflation pressure.

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Section: Introductionmentioning

confidence: 99%

Tyre Configuration and Axle Load of Front-Wheel Assist and Four-Wheel Drive Tractors Effects on Soil Compaction and Rolling Resistance under No-Tillage

et al. 2022

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“…Comparando a coluna de eficiência (Tabela 3) com a de patinamento (Tabela 2), observa-se que, nos tratamentos em que o patinamento foi maior, a eficiência foi menor, o que está de acordo com as observações de vários autores, entre os quais, WISMER & LUTH (1973), ZOZ (1987) e MAZIERO et al (1997. Os resultados da exigência tratória expressa pelo coeficiente de tração ou eficiência tratória corroboram com as afirmações de WISMER & LUTH (1973), LILJEDAHL et al (1995), MIALHE (1996), CORRÊA et al (1999 …”

Section: Resultsunclassified

“…Das três principais maneiras de utilizar a potência gerada pelo motor de um trator agrícola, tomada de potência, sistema hidráulico e barra de tração, esta última é a mais utilizada, apesar de ser menos eficiente (LILJEDAHL et al, 1995). Segundo os autores, a transmissão de potência por meio da barra de tração é a maneira mais comum de utilizar o trator porque é versátil.…”

Section: Introductionunclassified

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Desempenho de um trator operando em solo com diferentes tipos de cobertura vegetal

Filho

Silva

Modolo³

et al. 2004

Eng. Agríc.

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RESUMO:A eficiência de um trator para desenvolver esforço tratório depende da interação entre o rodado e o solo, envolvendo um complexo conjunto de fatores: característica do rodado, patinagem, transferência de peso do trator, tipo de solo, umidade, estado de compactação, tipo de cobertura do solo, entre outros, que proporcionam diferentes condições de trabalho e interferem no desempenho do trator. Assim, conduziu-se o presente trabalho com o propósito de avaliar alguns desses fatores no desempenho de um trator agrícola, em área coberta com diferentes tipos de cobertura vegetal (aveia, ervilhaca, nabo, aveia e nabo e sem cobertura). O trator foi submetido a cargas por meio do acoplamento a um escarificador de arrasto e instrumentado para a obtenção da força de tração, velocidade de deslocamento, patinagem e consumo de combustível sendo os dados armazenados por meio de um sistema de aquisição de dados. A patinagem foi maior onde a massa de matéria seca era maior, porém não influenciou na potência requerida na barra de tração. A melhor eficiência de tração foi obtida nas parcelas sem cobertura. O coeficiente de tração foi maior nos tratamentos com cobertura de aveia, ervilhaca e nabo comparados com a área sem cobertura. Conclui-se que a cobertura do solo interfere na capacidade do trator em desenvolver esforço para tracionar máquinas e implementos e que o tipo de cobertura pode causar mudanças na patinagem e na eficiência tratória. PALAVRAS-CHAVE: eficiência tratória, potência, patinagem. TRACTOR PERFORMANCE IN SOIL WITH DIFFERENT TYPES OF PLANTS COVERING SUMMARY:The efficiency of a tractor to draft development depends on the interaction among the wheeled and the soil where it moves and it involves a complex group of factors, such as: characteristic of the tire, slip, the tractor weight transfer, soil type, water texture and soil compactation, type of soil covering, among others. The aim of this work was to evaluate the acting of an agricultural tractor in an area covered with different types of plants. It was used five types of soil covering (oat, Vicia sativa, turnip, oat and V. sativa together and without cover). A load cell, pulse sensor, flow meters and a system of data acquisition, was used. The slip was larger where the mass of dry matter was larger, even so it didn't influence in the potency requested in the drawbar and in the consumption of fuel. The best traction efficiency was obtained in the portions without covering. The traction coefficient was larger in the treatments with covering of oat, Vicia sativa and turnip, when compared with the area without covering. It is ended that the covering of the soil interferes in the capacity of the tractor in developing effort for pull machines and the covering type can intervene in the slip and tractor efficiency.

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Traction

Cited by 2 publications

References 12 publications

Tyre Configuration and Axle Load of Front-Wheel Assist and Four-Wheel Drive Tractors Effects on Soil Compaction and Rolling Resistance under No-Tillage

Tyre Configuration and Axle Load of Front-Wheel Assist and Four-Wheel Drive Tractors Effects on Soil Compaction and Rolling Resistance under No-Tillage

Desempenho de um trator operando em solo com diferentes tipos de cobertura vegetal

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