INFLUENCE OF BIODIESEL FUELS ON LUBRICITY OF PASSENGER CAR DIESEL ENGINE OILS

U ovom radu se prati fizikalni i kemijski utjecaj sastavnica biodizela, koji su već na tržištu i onih koji će se koristiti, na performance tipičnog motornog ulja putničkog automobila niskog SAPS-a (sulfati-fosfati-sumpor). Osim metilnih estera masnih kiselina (FAME) koji se danas koriste, također se proučava i buduća generacija hidroobrađenih biljnih ulja (HVO) koja će se koristiti kao biogena sastavnica prilikom namješavanja goriva. U suvremenom 4-cilindarskom dizelovom motoru provedeni su karakteristični testovi gdje su korištena različita goriva koja sadržavaju biodizel, uz istovremeno obnavljanje filtra, kako bi se ostvarila visoka opterećenja i naprezanja motornog ulja. Uzorci korištenih motornih ulja su karakterizirani i uspoređivani nakon provedbe testova.The present paper will mainly focus on the physical and chemical impact of currently used and future biodiesel components on the performance of a typical low- sulfated-ash-phosphorus-sulfur (low SAPS) passenger car engine oil. Beside a current fatty acid methyl ester (FAME), a next generation hydrotreated vegetable oil (HVO) is also investigated as a biogenic fuel blend component. In a representative modern four-cylinder diesel engine test runs with different biodiesel containing fuels were combined with diesel particulate filter regeneration to reach high loads and stresses on the engine oil. The samples of used engine oils were characterized and compared after the engine test runs