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Effect of base oil on the characteristics of emitted particulate matter from a four-cylinder turbocharged diesel engine was investigated. This engine was lubricated with two kinds of base oil (characterized as 150 and 350). The viscosity and flash point of 350 base oil are higher than 150 base oil’s. Transmission Electron Microscope, Raman spectroscopy and Thermogravimetric analyzer (TGA) were employed...
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