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    METHOD FOR IMPROVING DEPOSIT CONTROL AND CLEANLINESS PERFORMANCE IN AN ENGINE LUBRICATED WITH A LUBRICATING OIL
    1.
    发明申请
    METHOD FOR IMPROVING DEPOSIT CONTROL AND CLEANLINESS PERFORMANCE IN AN ENGINE LUBRICATED WITH A LUBRICATING OIL 审中-公开

    公开(公告)号：US20190031975A1

    公开(公告)日：2019-01-31

    申请号：US16029897

    申请日：2018-07-09

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Michael L. BLUMENFELD ,  Smruti A. DANCE ,  Douglas E. DECKMAN

    IPC: C10M169/04 ,  C10M129/34 ,  C10M129/72 ,  C10M133/16 ,  C10M145/14 ,  C10M101/02 ,  C10M107/02 ,  C10M143/12 ,  C10M143/10

    Abstract: A method for improving deposit control and cleanliness performance in an engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil comprises a lubricating oil base stock as a major component, and a mixture of (i) at least one dispersant, and (ii) at least one viscosity modifier, as minor components. The at least one dispersant and the at least one viscosity modifier are present in an amount sufficient to have a critical dispersant thickening ratio of greater than 0.33. The critical dispersant thickening ratio is determined in accordance with the formula: Σ  [ G n ] *  dV  /  d  [ G n ] Σ  [ B m ] *  dV  /  d  [ B m ] wherein [Gn] is the weight percent of each of n dispersants in the formulated oil, [Bm] is the weight percent of each of m viscosity modifiers in the formulated oil, dV/d[Gn] is the kinematic viscosity (Kv100) increase of the lubricating oil per the weight percent of each of n dispersants in the formulated oil, and dV/d[Bm] is the kinematic viscosity (Kv100) increase of the lubricating oil per the weight percent of each of m viscosity modifiers in the formulated oil.

    LUBRICATING OIL COMPOSITIONS WITH VISCOSITY AND DEPOSIT CONTROL
    2.
    发明申请
    LUBRICATING OIL COMPOSITIONS WITH VISCOSITY AND DEPOSIT CONTROL 审中-公开

    公开(公告)号：US20190093040A1

    公开(公告)日：2019-03-28

    申请号：US16123137

    申请日：2018-09-06

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Douglas E. DECKMAN ,  Smruti A. DANCE ,  Luca SALVI

    IPC: C10M133/12 ,  C10M129/74

    Abstract: A method for improving viscosity control, while maintaining or improving deposit control, of a lubricating oil in an engine or other mechanical component lubricated with the 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 polymeric aminic antioxidant, as a minor component. The at least one polymeric aminic antioxidant is the polymerization reaction product of one or more unsubstituted or hydrocarbyl-substituted diphenyl amines, one or more unsubstituted or hydrocarbyl-substituted phenyl naphthyl amines, or both one or more of unsubstituted or hydrocarbyl-substituted diphenylamine with one or more unsubstituted or hydrocarbyl-substituted phenyl naphthylamine. The lubricating oil base stock is present in an amount from 1 to 85 weight percent and the at least one polymeric aminic antioxidant is present in an amount from 0.1 to 5 weight percent.

    LUBRICATING OIL COMPOSITIONS HAVING IMPROVED CLEANLINESS AND WEAR PERFORMANCE
    4.
    发明申请
    LUBRICATING OIL COMPOSITIONS HAVING IMPROVED CLEANLINESS AND WEAR PERFORMANCE 审中-公开

    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.

    LUBRICATING OIL COMPOSITIONS WITH ENGINE WEAR PROTECTION
    5.
    发明申请
    LUBRICATING OIL COMPOSITIONS WITH ENGINE WEAR PROTECTION 审中-公开

    公开(公告)号：US20190127658A1

    公开(公告)日：2019-05-02

    申请号：US16151454

    申请日：2018-10-04

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Candice I. PELLIGRA ,  Smruti A. DANCE ,  Jordan C. SMITH

    IPC: C10M169/04 ,  C10M105/32 ,  C10M105/06 ,  C10M129/54 ,  C10M135/10 ,  C10M141/08

    Abstract: A method for improving wear control of a steel surface lubricated with a lubricating oil through the generation of fast-forming 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 detergent, as a minor component; and (ii) forming a tribofilm on the steel surface. The time for the tribofilm to reach 95% of its saturation coverage (t95,sat) on the steel surface is less than about 50 minutes, as determined by a high frequency reciprocating rig (HFRR) in accordance with a modified version of ASTM D6079. A lubricating oil including an ester base stock, an alkylated naphthalene base stock, or mixtures thereof, as a major component; and at least one detergent including an alkaline earth metal salicylate, an alkaline earth metal sulfonate, or mixtures thereof, as a minor component.

    LUBRICATING OIL COMPOSITIONS WITH ENGINE WEAR PROTECTION
    6.
    发明申请
    LUBRICATING OIL COMPOSITIONS WITH ENGINE WEAR PROTECTION 审中-公开

    公开(公告)号：US20190127654A1

    公开(公告)日：2019-05-02

    申请号：US16151481

    申请日：2018-10-04

    Applicant: ExxonMobil Research and Engineering Company

    Inventor： Candice I. PELLIGRA ,  Smruti A. DANCE ,  Douglas E. DECKMAN ,  Steven KENNEDY

    IPC: C10M105/32 ,  C10M105/06 ,  C10M101/02 ,  C10M107/02 ,  C10M129/68 ,  C10M129/54 ,  C10M129/34 ,  C10M133/16 ,  C10M135/10 ,  C10M155/04

    Abstract: 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 (fs), 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.

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