LUBRICANT COMPOSITIONS FOR DIRECT INJECTION ENGINE

• US 20180087001A1
• Filed: 03/22/2016
• Published: 03/29/2018
• Est. Priority Date: 03/25/2015
• Status: Active Grant

• Current Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Inventors: Mosier, Patrick E., Dietz, Jeffry G., Sammut, Alexander, Galic Raguz, Mary, Gieselman, Matthew D.
• Granted Patent: US 10,800,992 B2
• Time in Patent Office: Days
• CPC Class Codes: C10M 101/00 Lubricating compositions characterised by the base-material being a mineral or fatty oil containing more than 10% water C10M173/00
• CPC Class Codes: C10M 129/10 having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
• CPC Class Codes: C10M 133/06 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 133/56 Amides; Imides
• CPC Class Codes: C10M 155/04 Monomer containing boron
• CPC Class Codes: C10M 161/00 Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
• CPC Class Codes: C10M 169/041 the additives being macromolecular compounds only
• CPC Class Codes: C10M 169/044 the additives being a mixture of non-macromolecular and macromolecular compounds
• CPC Class Codes: C10M 2203/003 used as base material
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2207/023 having hydroxy groups bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2207/026 with tertiary alkyl groups
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2215/064 Di- and triaryl amines
• CPC Class Codes: C10M 2215/26 Amines
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/089 Overbased salts
• CPC Class Codes: C10M 2229/00 Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
• CPC Class Codes: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2020/02 : Viscosity; Viscosity index
• CPC Class Codes: C10N 2020/04 : Molecular weight; Molecular weight distribution
• CPC Class Codes: C10N 2030/00 : Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
• CPC Class Codes: C10N 2030/04 : Detergent property or dispersant property
• CPC Class Codes: C10N 2030/10 : Inhibition of oxidation, e.g. anti-oxidants
• 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 2030/43 : Sulfur free or low sulfur content compositions
• CPC Class Codes: C10N 2030/45 : Ash-less or low ash content
• 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
• CPC Class Codes: F02M 21/0215 : Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
• CPC Class Codes: Y02T 10/12 : Improving ICE efficiencies
• CPC Class Codes: Y02T 10/30 : Use of alternative fuels, e.g. biofuels

Abstract

The invention is directed to a method for reducing low speed pre-ignition events in a spark-ignited direct injection internal combustion engine by supplying to the sump a lubricant composition which contains an oil of lubricating viscosity and a boron-containing ashless dispersant. The ashless dispersant may be selected from succinimide compounds prepared from aliphatic or aromatic amines.

Claims

1. A method for reducing low speed pre-ignition events in a spark-ignited direct injection internal combustion engine comprising supplying to the engine a lubricant composition comprising a base oil of lubricating viscosity and a boron-containing ashless dispersant.

2. The method of claim 1, wherein the engine is operated under a load with a brake mean effective pressure (BMEP) of greater than or equal to 10 bars.

3. The method of claim 1, wherein the engine is operated at speeds less than or equal to 3,000 rpm.

4. The method of claim 1, wherein the engine is fueled with a liquid hydrocarbon fuel, a liquid non-hydrocarbon fuel, or mixtures thereof.

5. The method of claim 4, wherein the engine is fueled by natural gas, liquefied petroleum gas (LPG), compressed natural gas (CNG), or mixtures thereof.

6. The method of claim 1, wherein the boron-containing ashless dispersant is a polyalkenyl dispersant derived from acylated polyisobutylene.

7. The method of claim 1, wherein the boron-containing ashless dispersant comprises a polyisobutylene succinimide compound.

8. The method of claim 7, wherein the polyisobutylene succinimide compound is prepared from an amine comprising one or more of aliphatic polyamines, aromatic amines, polyether amines, and mixtures thereof.

9. The method of claim 6, wherein the acylated polyisobutylene is prepared by a chlorine process, a thermal process, a free radical polymerization process, or combinations thereof.

10. The method of claim 1, wherein the lubricant composition further comprises at least one other additive selected from an ashless antioxidant, a metal containing overbased detergent, a phosphorus-containing anti-wear additive, a friction modifier, and a polymeric viscosity modifier.

11. The method of claim 10, wherein the ashless antioxidant is derived from a 2,6-dialkyl phenol.

12. The method of claim 10, wherein the ashless antioxidant is a diarylamine compound.

13. The method of claim 1, wherein the boron-containing ashless dispersant is present in an amount from 1.0 to 6.5 weight percent of the lubricant composition.

14. The method of claim 15, wherein the lubricant composition further comprises a boron-free dispersant in an amount 0.1 to 5.0 weight percent of the lubricant composition.

15. The method of claim 1, wherein the lubricating composition comprises at least 50 weight % of Group II base oil, Group III base oil, or mixtures thereof.