Efecto de la relación de compresión en el rendimiento de motores de combustión interna a diferentes altitudes

Abstract

Considering these factors, this study developed analytical-empirical equations to obtain power losses in internal combustion engines (Otto cycle) at a different altitude based on the compression ratio of the engine and on the adiabatic coefficients of air-fuel air and pure air. The decrease in air density with altitude is the most important cause for the power loss of internal combustion engines. However, there are other factors that introduce additional power reduction, and that are not considered in current models available. An expression that not only considers the density of air but also includes the compression ratio of the engine is proposed. Thus, the power loss due to the altitude for an internal combustion engine with a certain power at sea level, is slightly lower at higher compression ratios.