LUBRICATING OIL COMPOSITION

• US 20170022441A1
• Filed: 11/20/2014
• Published: 01/26/2017
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: ONODERA, Ko, NEMOTO, Shuzo, KATO, Tomohiro, FUJIMOTO, Kosuke, YAMASHITA, Minoru
• Granted Patent: US 10,947,475 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C10M 141/12 at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2205/02 containing acyclic monomers
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2207/262 derived from hydroxy substituted aromatic acids, e.g. salicylates
• CPC Class Codes: C10M 2209/084 Acrylate; Methacrylate
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2215/30 Heterocyclic compounds
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/068 Thiocarbamate metal salts
• CPC Class Codes: C10M 2223/045 Metal containing thio derivatives
• CPC Class Codes: C10M 2227/066 derived from Mo or W
• CPC Class Codes: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2010/12 Groups 6 or 16
• CPC Class Codes: C10N 2020/02 Viscosity; Viscosity index
• CPC Class Codes: C10N 2020/04 Molecular weight; Molecular weight distribution
• CPC Class Codes: C10N 2030/04 Detergent property or dispersant property
• CPC Class Codes: C10N 2030/12 Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
• CPC Class Codes: C10N 2030/40 Low content or no content compositions
• CPC Class Codes: C10N 2030/42 : Phosphor free or low phosphor content compositions
• CPC Class Codes: C10N 2040/25 : Internal-combustion engines
• CPC Class Codes: C10N 2040/255 : Gasoline engines
• CPC Class Codes: C10N 2060/14 : by boron or a compound containing boron

Abstract

A lubricating oil composition which can reduce the occurrence frequency of LSPI and which can ensure detergency. The lubricating oil composition which includes a lubricant base oil, a compound having calcium and/or magnesium, a compound having molybdenum and/or phosphorus, and an ashless dispersant having nitrogen and which satisfies X≦−0.85 and Y≧0.18 (wherein X is calculated according to formula (1): X=([Ca]+0.5[Mg])×8−[Mo]×8−[P]×30 and Y is calculated according to formula (2): Y=[Ca]+1.65[Mg]+[N]). The lubricating oil composition for use in an internal combustion engine, more particularly, a lubricating oil composition for use in a supercharged gasoline engine.

Claims

1. A lubricating oil composition, comprising:

a lubricating oil base oil, a compound having at least one element selected from calcium and magnesium, a compound having at least one element selected from molybdenum and phosphorous, and an ashless dispersant having nitrogen;

wherein,

X as determined from following equation (1);

X=([Ca]+0.5[Mg])×

8−

[Mo]×

8−

[P]×

30 

 

(1)

wherein [Ca], [Mg], [Mo] and [P] in equation (1) respectively represent the concentrations (wt %) of calcium, magnesium, molybdenum and phosphorous in the lubricating oil composition,

satisfies the expression X≦

−

0.85; and

,

Y as determined from following equation (2);

Y=[Ca]+1.65[Mg]+[N] 

 

(2)

wherein [Ca], [Mg] and [N] in equation (2) respectively represent the concentrations (wt %) of calcium, magnesium and nitrogen derived from ashless dispersant in the lubricating oil composition,

satisfies the expression Y≧

0.18.

2. The lubricating oil composition according to claim 1, wherein Z as determined from following equation (3):

Z=[N]/([Ca]+[Mg]) 

 

(3)

wherein [Ca], [Mg] and [N] respectively represent the concentrations (wt %) of calcium, magnesium and nitrogen derived from an ashless dispersant in the lubricating oil composition,

further satisfies the expression 0.3≦

Z≦

1.5.

3. The lubricating oil composition according to claim 1, wherein the concentration of phosphorous [P] contained in the lubricating oil composition satisfies the expression [P]≦

0.12% by weight.

4. The lubricating oil composition according to claim 1, wherein the concentration of molybdenum [Mo] contained in the lubricating oil composition satisfies the expression [Mo]≦

0.1% by weight.

5. The lubricating oil composition according to claim 1, wherein the concentration of calcium [Ca] and the concentration of magnesium [Mg] contained in the lubricating oil composition satisfy the expression [Ca]+1.65[Mg]≧

0.08% by weight.

6. The lubricating oil composition according to claim 1, wherein the lubricating base oil has a kinetic viscosity at 100°

C. of 2 mm²/s to 15 mm²/s.

7. The lubricating oil composition according to claim 1, containing at least one metal cleaner [A] having calcium or magnesium.

8. The lubricating oil composition according to claim 1, containing at least one wear inhibitor [B] having phosphorous.

9. The lubricating oil composition according to claim 1, containing at least one friction modifier [C] having molybdenum.

10. The lubricating oil composition according to claim 1, containing at least one viscosity index improver [E].

11. The lubricating oil composition according to claim 1, which is for an internal combustion engine.

12. The lubricating oil composition according to claim 11, wherein the internal combustion engine is a supercharged gasoline engine.