Exxonmobil Research and Engineering Company

Steven Kennedy

Andrew G Horodysky

Brandon T Weldon

Riccardo Conti

Steven M Jetter

Ramesh Varadaraj

Jacob Joseph Habeeb

Douglas Edward Deckman

Zhisheng Gao

Smruti A Dance

William H Buck

Aparna Subramanian

Leonard R Koenig

Jeffrey Robert Torkelson

Candice I Pelligra

Arthur T Andrews

William J Golumbfskie

Liehpao Oscar Farng

A method for improving wear control of a steel surface lubricated with a lubricating oil through the generation of thick tribofilms. The method includes: (i) using as the lubricating oil a formulated oil, the formulated oil having a composition comprising at least one lubricating oil base stock as a major component; and at least one lubricating oil additive, as a minor component; and (ii) forming a tribofilm on the steel surface. In time-step tribofilm formation measurements of the lubricating oil by a mini-traction machine (MTM) at constant slide-to-roll ratio (SRR), the saturation traction coefficient (f), which correlates to tribofilm thickness on the steel surface, is greater than about 0.11. In the method of this disclosure, elongation of timing chain due to wear of chain link pins is less than about 0.07%, as determined by Ford Chain Wear (FCW) test conducted in accordance with ILSAC GF-6 specification. The lubricating oils are useful in internal combustion engines.

Lubricating oil compositions with engine wear protection

A method for improving fuel efficiency testing precision in on-road vehicles. The method comprises: installing one or more dataloggers in one or more vehicles, each datalogger configured to receive fuel consumption data broadcast by an on-road vehicle's engine control unit (ECU); transmitting the fuel consumption data from the one or more dataloggers in the one or more on-road vehicles to a processor; and analyzing, using the processor, the fuel consumption data from the one or more dataloggers in the one or more on-road vehicles to determine fuel efficiency of the one or more on-road vehicles. The fuel consumption data comprises fuel rate data from the ECU which is transmitted through the one or more dataloggers, engine speed and other operating parameters from the ECU that are transmitted through the one or more dataloggers, torque sensor data which is transmitted through the one or more dataloggers, and traditional fuel log data.

Method for improving fuel economy test precision in on-road vehicles

Lubricating oil used for the lubrication of engines run on biodiesel fuels are improved in their resistance to oxidation, sludge and deposits formation by the addition to said lubricating oil of detergent to increase the TBN of the lubricating oil or the addition of organic bases.

Method for improving the resistance to one or more of corrosion, oxidation, sludge and deposit formation of lubricating oil compositions for biodiesel fueled engines

Periodically heating a soot containing engine lubricant to a temperature in the range of about 115&#xb0; C. to about 150&#xb0; C. is effective in controlling soot induced viscosity increase of the lubricant. The period at which heating is conducted may be a function of the number of hours the engine has been operated or it may be based on the oil condition.

Method for controlling soot induced lubricant viscosity increase

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West Chester, PA, United States of America

Steven Kennedy