Projeto e simulação de um sistema de controle para válvulas de motores quatro tempos

Abstract

Internal combustion engines are widely used, and to be competitive in the market it is necessary to invest in technologies that increase their efficiency compared to competitors. With advances in technology and manufacturing methods, the costs of using microcontrollers on a day-to-day basis are steadily declining, including those to improve products already established in the market such as internal combustion engines This work aims to develop a control system for individual drive of the valves of a four stroke engine, aiming to redefine the overlap, the opening and closing times, to get closer to the ideal considering different engine operating regimes. The methodology applied in this work was the development of a firmware for Arduino, designed as a system in which we have the engine rotation as input signal, and the opening and closing times of the valves as output signals, and then these signals were simulated on an oscilloscope and interpreted. With this data in hand, it was concluded that Arduino really is a great tool for prototyping that demonstrates satisfactory results, but the ideal would be the use of a dedicated controller for this function to obtain greater precision in a real project.