Projeto e construção de um dinamômetro hidráulico para motores estacionários

Abstract

The present work aims to design and manufacture a hydraulic dynamometer for testing stationary engines of up to 10 Hp, used by the Baja SAE and Shell Eco-Marathon teams at UTFPR-Curitiba. The braking system consists of a hydraulic gear pump and a pressure regulator valve coupled to a load cell, which will be used to calculate torque, thermocouples for temperature acquisition and a light encoder for speed reading. The system is controlled through a LabView interface in conjunction with Arduino, presenting the torque and power curves of the motor as results. A comparison between the same engine, with and without an air filter, was made to validate the accuracy of the data obtained by the dynamometer. After analyzing the results, it is possible to conclude that the dynamometer was able to reproduce the curves provided by the manufacturer, presenting a divergence of approximately 15%, it is concluded that the equipment is capable of measuring differences in performance between an engine with and without filter, where for the last case a power gain was observed at high rotations.