Estudo da adaptação de um motor monocilíndrico de ciclo Otto em ciclo Atkinson

Abstract

Internal combustion engines are present in our daily lives, as in cars, buses, trucks, among others. They are used to transform the chemical energy of fuel into mechanical energy. With environmental legislation increasingly restrictive about to the emission of combustion products, it is necessary to have engines with increasingly effective energy efficiency. The Atkinson’s cycle is a more efficient cycle than the Otto’s cycle, because its design allows a process of expansion greater than the compression process. The design of an Atkinson’s cycle engine is complex, so this work seeks a study of the Otto’s cycle engine adaptation into the Atkinson’s. Through scientific publications it was possible to analyze the necessary changes to adapt the cycle of a single-cylinder engine from the Otto’s cycle to the Atkinson’s cycle of extended expansion. These changes include the project of a new toothed pulley, new camshafts, and displacement of rocker arms and valves arms of the selected engine.