부산대학교 도서관

The first-generation hybrid and electric vehicle powertrains were developed using conventional automatic transmission fluids (ATF), but these are being superseded by a new generation of fluid technology, increasingly termed driveline “e-fluids”using specific additive packages optimised for each application. When lubricants are in direct contact with powered motor windings, or other exposed electrical components, characteristics such as preventing copper corrosion and raised fluid electrical resistivity are of major importance. This is in addition to providing wear performance as required, which is an improvement on the nature of fluid types and increasingly being selected by OEMs (original equipment manufacturers). Additionally, motor efficiency increases with greater cooling and reduced spin loss, both improved through use of new lower viscosity base oils. The types of additive components now being used have changed significantly, and a latest type are now “sulfur-free”of active additive sulfur. Additionally, the selection of suitable base oil characteristic is key to the overall e-fluid performance.