mauro fernando ferreira estudo da relação cinemática entre eixos ...

xABSTRACTSTUDY OF THE KINEMATIC RELATION BETWEEN AXLES ON TRACTIVEPERFORMANCE OF THE WHEEL TRACTOR EQUIPED WITH TWO TIRESTYPES.Author: Mauro Fernando FerreiraAdviser: José Fernando SchlosserThe tractive performance of a front whell assisttractor was evaluated. Radial tires and bias tires wereused in two soil conditions (fast and loose). The purposeof this work was verify the traction performance withboth tires, changing the statics kinematics relations.The static kinematic relation vary according withtreatments, changing inflation pressures. Were measuredin the field the slip (front and rear) drawbar pull androlling resistence. The results indicated statickinematic relation don’t influence traction efficience.The maximum drawbar pull were the same with slip between10% to 15% in both tires. The traction coefficient of thebias tires were 30% better than radial tires in twosurfaces conditions.UNIVERSIDADE FEDERAL DE SANTA MARIAPROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA AGRÍCOLAMasters degree dissertation in agriculturalEngineeringSanta Maria, May 14th 1999