公开(公告)号：US20200032158A1

公开(公告)日：2020-01-30

申请号：US16519202

申请日：2019-07-23

Applicant: ExxonMobil Research and Engineering Company

Inventor： Jordan C. Smith ,  Smruti A. Dance ,  Michael L. Blumenfeld

IPC: C10M169/04 ,  C10M129/74 ,  C10M135/18 ,  C10M125/10 ,  C10M135/14 ,  C10M129/95 ,  C10M133/16 ,  C10M141/08 ,  C10M141/02 ,  C10M141/06

Abstract: A method for improving corrosion resistance, while maintaining or improving fuel efficiency, in an engine or other mechanical component lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition comprising a lubricating oil base stock as a major component, and at least one friction modifier having an elemental composition comprising one or more of nitrogen (N), oxygen (O), and phosphorus (P), as a minor component. The formulated oil has a corrosion factor, based on the elemental composition of the at least one friction modifier, of less than 500, as determined by the formula: 12900(N wt %)+3967(O wt %)−8524(P wt %)−250=corrosion factor. The lubricating oils are useful as passenger vehicle engine oils (PVEO) and commercial vehicle engine oils (CVEO).

公开(公告)号：US20190127655A1

公开(公告)日：2019-05-02

申请号：US16151462

申请日：2018-10-04

Applicant: ExxonMobil Research and Engineering Company

Inventor： Smruti A. DANCE ,  Steven KENNEDY ,  Jordan C. Smith ,  Luca SALVI

IPC: C10M129/54 ,  C10M135/10 ,  C10M133/56 ,  C10M101/02 ,  C10M107/02

Abstract: A method for improving wear control, while maintaining or improving deposit control and cleanliness, in an engine or other mechanical component lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including a lubricating oil base stock as a major component, and specific combinations of low soap detergents, dispersants, and/or mixtures thereof, as a minor component. The low soap detergents include alkaline earth metal salicylates, alkaline earth metal sulfonates, or mixtures thereof, all having the same or different total base number (TBN). The total amount of soap delivered by the low soap detergent is less than 0.60 weight percent of the lubricating oil. The dispersants include borated and/or non-borated polyisobutylene succinimide (PIMA) having a basic nitrogen content of 1% or greater. The lubricating oils are useful in internal combustion engines.

公开(公告)号：US20190169524A1

公开(公告)日：2019-06-06

申请号：US16176161

申请日：2018-10-31

Applicant: ExxonMobil Research and Engineering Company

Inventor： Jordan C. Smith ,  Raymond G. Burns, III ,  Smruti A. Dance ,  Douglas E. Deckman

IPC: C10M169/04 ,  C10M107/02 ,  C10M125/02 ,  C10M125/10

Abstract: A method for preventing or reducing low speed pre-ignition in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including a lubricating oil base stock as a major component, and at least one lubricating oil additive, as a minor component. The lubricating oil contains at least one metal or metalloid in an amount sufficient that, in thermogravimetric measurements of the lubricating oil by a Thermogravimetric Engine Oil Simulation Test, carbon black decomposition temperature is increased as compared to the carbon black decomposition temperature in a lubricating oil containing calcium or magnesium. A lubricating oil useful for preventing or reducing low speed pre-ignition in an engine lubricated with the lubricating oil. The lubricating oils of this disclosure are particularly advantageous as passenger vehicle engine oil (PVEO) products.