Monitoração dos parâmetros tribológicos e de desempenho de motores a Diesel e bicombustível (Diesel/GNL)

Abstract

The growing need of the industrial competitive market to determine and predict with greater safety and reliability failure mechanisms in dynamic mechanical system, for example, internal combustion engines, makes the big industries to invest resources in preventive and predictive measures, the achieve greater industrial productivity and reduce costs in the relevant criteria for stopping the machines together at the same time with the need to seek new forms of alternative fuels, through the combined use of fossil energy sources, in order to preserve the time working equipment and seek a sustainable economy. The present work is therefore to compare and describe tribological performance and the effects of use in DASH-9 7FDL16 EFI engines, railway locomotives supplied with diesel / GNL mixture in the proportion 70% / 30% parameters, compared with a same motor fueled by diesel fuel only. For this, use is made of the measurement of mechanical components (cylinders, piston rings and valves) by using dimensional analysis, analysis in diametral cylinders off, thickness and opening of the piston rings and valve timing, added with the analysis of its physical phenomena, pressure, temperature, vibration, motor parameters, emission, lubricant and sound pressure level, linking the two methods of analysis, mathematical and statistically comparing the engines and reporting the performance of using dual-fuel engine , diesel / GNL (70% / 30%), within the life of the dynamic system subjected to 1050 hours of testing at full load. It has been observed thereby that engines fueled with diesel / LNG mixture in the proportion 70% / 30% showed less wear than expected in the literature and some components compared with the other engine fueled by diesel only.