公开(公告)号：US11345872B2

公开(公告)日：2022-05-31

申请号：US17148639

申请日：2021-01-14

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Zhisheng Gao

IPC: C10M111/00 ,  C10M133/12 ,  C10M137/08 ,  C10N30/00 ,  C10N30/02 ,  C10N30/04 ,  C10N30/06 ,  C10N40/25

Abstract: Sulfur-free, ashless, and low phosphorus-containing lubricant compositions for use as engine oil having improved oxidation stability. The lubricant composition can include about 60.0 mass % to about 99.8 mass % of an oil base stock, at least one ashless antiwear additive, at least one ashless detergent, and at least one antioxidant, based on a total mass of the lubricant composition. The oil base stock can include at least one polyalphaolefin and at least one alkyl naphthalene. The lubricant composition can contain less than about 0.05 mass % phosphorus, less than about 0.05 mass % sulfur, and less than about 0.05 mass % ash. The lubricant composition can be made by a process that includes combining the above-mentioned components to provide a lubricant composition.

公开(公告)号：US11629308B2

公开(公告)日：2023-04-18

申请号：US16744670

申请日：2020-01-16

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Luca Salvi ,  Zhisheng Gao ,  Abigail R. Van Wassen ,  Martin N. Webster

IPC: C10M169/04 ,  C10M171/02 ,  C10N20/02 ,  C10N30/02 ,  C10N30/10 ,  C10N40/04 ,  C10N40/14

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 (KV100) from 1 cSt to 7 cSt at 100° 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.