2021 : The use of Natural Filters from Sawdust in High Speed Diesel Engines and its Effect on Lubricating Oil Properties & engine performance
The impact of oil filter on lubricating oil stability and engine performance has been of interest to researchers for a long time. In early years, some additives were added into the oil filter element to extend the useful life of lubricating oil in an internal combustion engine. The most widely used materials for oil filter are the synthetic fiber paper or metal mesh on the market which can effectively remove particulate impurities but show deficiency in the removal of insoluble colloids from lubricant. Renewable and easy available biomass materials, such as plant residues, straw, and sawdust possess rich pore structure and natural texture which show large adsorption capacity to dyes, oil, toxic salts, and heavy metals. In this research, a modified-sawdust oil filter (MSF) was developed and compared with conventional metal mesh oil filter (CMF) to know its effect to lub oil properties. The test was performed using a one-cylinder, light-duty direct injection diesel engine. In steady state, the specific fuel oil consumption (SFOC), engine output power was measured at four different typical engine speeds. Exhaust emissions of nitrogen oxides (NOx), particulate matter (PM), carbon monoxide (CO) and hydrocarbons (HC) were analysed according to IMO emission test procedure. Besides, lubricant oil sample were extracted from the crankcase in the equipment of MSF and CMF individually. Then the kinematic viscosity, viscosity index, flash point, pour point, total base number (TBN) and metal content of oil samples were determined. The results showed that MSF effectively reduced wear metal accumulation and degradation in lubricating oil. Compared to CMF, an increase of 0,02 kW in maximum output power and decrease of 2 g/kWh in SFOC were observed for MSF.