2020 Volume 51 Issue 5 Pages 900-905
The viscosity of engine oil becomes lower because the reduction of CO2 emissions produced from automobiles is required in recent years. Antinomy due to low viscosity oil such as severe wear and scuffing at boundary lubrication must be dealt with by additives in the oil. Molybdenum dithiocarbamate (MoDTC) is widely used for friction modifier, but the effect depends on the materials and additives used in combination. We must clarify the reaction process and the ideal structure of tribo-film in order to obtain the effect of MoDTC more. For the purpose, we use Raman spectroscopy and transmission electron microscopy (TEM) to focus on the change in the orientation of MoS2. And we have a purpose to find the method to control the structure of tribo-film by materials, and achieve lower friction in actual engine systems.
