公开(公告)号：WO2020176171A1

公开(公告)日：2020-09-03

申请号：PCT/US2020/013835

申请日：2020-01-16

Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY

Inventor： SALVI, Luca ,  GAO, Zhisheng ,  VAN WASSEN, Abigail R. ,  WEBSTER, Martin N.

IPC: C10M169/04 ,  C10M171/00

Abstract: This disclosure relates to a lubricating oil (e.g., gear oil) for use in an electric or hybrid vehicle. The lubricating oil has a composition including one or more lubricating oil base stocks as a major component, and one or more lubricating oil additives, as a minor component. The one or more lubricating oil base stocks include at least one Group IV base oil, or at least one Group V base oil. The lubricating oil has a kinematic viscosity (KV 100 ) from 1 cSt to 7 cSt at 1OO°C as determined by ASTM D-445, and an electrical conductivity at room temperature of less than 15,000 pS/m as determined by ASTM D-2624. This disclosure also relates to methods for producing a lubricating oil for a transmission, gear train, gear set, gear box, or gears of an electric vehicle powertrain and methods for improving energy efficiency, while maintaining or improving wear control.