Exxonmobil Technology and Engineering Company

Abigail R Van Wassen

Andrew Edmund Taggi

Shuji Luo

Gary Christensen

Luca Salvi

Zhisheng Gao

Martin N Webster

Percy Rohinton Kanga

Andrew D Satterfield

Kevin J Kelly

Heat transfer fluids corresponding to mixtures of at least one hydrogen bond donor and at least one hydrogen bond acceptor are provided. The heat transfer fluids can have an unexpectedly high heat capacity relative to the expected heat capacity based on the heat capacities of the at least one hydrogen bond donor and the at least one hydrogen bond acceptor. In some aspects, the heat transfer fluids can also have a sufficiently high electrical resistivity to be suitable for use in environments such as heat management systems in electric vehicles.

Thermal management fluids with synergistic heat capacity

A fluid includes a base stock and one or more additives. The base stock has a viscosity index of at least 80, and either a kinematic viscosity at 40&#xb0; C. of at least 320 cSt or a kinematic viscosity at 100&#xb0; C. of at least 14 cSt. The base stock includes greater than or equal to about 90 wt % saturates, less than or equal to about 10 wt % aromatics, and a sum of terminal/pendant propyl groups and terminal/pendant ethyl groups of at least 1.7 per 100 carbon atoms. The fluid has a thermal conductivity measured according to ASTM D7896 at 140&#xb0; C. of 0.12 W/m&#xb7;K or greater.

Fluids for electric vehicles

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) from 1 cSt to 7 cSt at 100&#xb0; 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.

Low viscosity gear oil compositions for electric and hybrid vehicles

Growing community of inventors

Florham Park, NJ, United States of America

Abigail R Van Wassen