Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-05-04T22:43:24Z No. of bitstreams: 1 EdilsonMarinhoSilvaJunior_DISSERT.pdf: 6513664 bytes, checksum: 740829bb11d8300fd197873698355261 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-05-04T22:53:06Z (GMT) No. of bitstreams: 1 EdilsonMarinhoSilvaJunior_DISSERT.pdf: 6513664 bytes, checksum: 740829bb11d8300fd197873698355261 (MD5) / Made available in DSpace on 2017-05-04T22:53:07Z (GMT). No. of bitstreams: 1 EdilsonMarinhoSilvaJunior_DISSERT.pdf: 6513664 bytes, checksum: 740829bb11d8300fd197873698355261 (MD5) Previous issue date: 2014-08-04 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A crescente necessidade do mercado competitivo industrial de determinar e prever com maior confiabilidade e seguran?a mecanismos de falhas em sistema mec?nicos din?micos, como, por exemplo, os motores a combust?o interna, faz com que as grandes ind?strias invistam recursos em medidas preventivas e preditivas, a fim de alcan?ar uma maior produtividade industrial e diminuir custos no relevante aos crit?rios de parada das m?quinas, aliado ao mesmo tempo com a necessidade de buscar novas formas de combust?veis alternativos, atrav?s do uso combinado de fontes f?sseis de energias, de modo a preservar o tempo ?til do equipamento e buscar uma economia sustent?vel. A presente disserta??o consiste portanto em comparar e descrever par?metros tribol?gicos e de desempenho dos efeitos da utiliza??o em motores DASH 9 7FDL16-EFI, de locomotivas ferrovi?rias abastecidas com a mistura Diesel/GNL nas propor??es 70%/30%, em compara??o com um mesmo motor abastecido apenas por combust?vel Diesel. Para isso, faz-se o uso da mensura??o de componentes mec?nicos (cilindros, an?is de segmento e v?lvulas) por meio da utiliza??o de an?lises dimensionais, an?lise diametral nos cilindros, folga, espessura e abertura dos an?is de segmento e abertura de v?lvulas, somados com a an?lise dos seus fen?menos f?sicos, press?o, temperatura, vibra??o, par?metros dos motores, emiss?o, lubrificante e n?vel de press?o sonora, relacionando os dois m?todos de an?lise, matem?tica e estatisticamente, comparando os motores e relatando o desempenho do uso do motor bicombust?vel, Diesel/GNL (70%/30%), no ?mbito da vida do sistema din?mico submetido a 1050 horas de ensaio em plena carga. Observou-se, dessa forma, que motores abastecidos com a mistura Diesel/GNL, nas propor??es 70%/30% evidenciou um desgaste menor que o previsto em literatura e em alguns componentes quando comparados com o outro motor abastecido apenas por Diesel. / 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.