# US 2020/0399556 A1 · Lubricant compositions for direct injection engine

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- Number: US 2020/0399556 A1
- Document ID: US20200399556A1
- Status: Published application
- Kind: A1
- Application number: 17/010,948
- Filed: 2020-09-03
- Published: 2020-12-24
- Earliest claimed: 2015-03-25
- Assignees: The Lubrizol Corporation
- Applicants: The Lubrizol Corporation
- Inventors: Patrick E. Mosier; Jeffry G. Dietz; Alexander Sammut; Mary Galic Raguz; Matthew D. Gieselman
- Web page: https://patentgrep.com/patent/US20200399556A1

## CPC

- C10M 169/044: {the additives being a mixture of non-macromolecular and macromolecular compounds}
- C10M 101/00: Lubricating compositions characterised by the base-material being a mineral or fatty oil (containing more than 10% water C10M173/00)
- C10M 129/10: having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
- C10M 133/06: having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M 133/56: Amides; Imides
- C10M 155/04: Monomer containing boron
- 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
- C10M 169/041: {the additives being macromolecular compounds only}
- F02M 21/0215: {Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas}
- C10M 2203/003: used as base material
- C10M 2203/1025: used as base material
- C10M 2207/023: having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M 2207/026: with tertiary alkyl groups
- C10M 2207/028: Overbased salts thereof
- C10M 2215/064: Di- and triaryl amines
- C10M 2215/26: Amines
- C10M 2215/28: Amides; Imides
- C10M 2219/046: Overbased sulfonic acid salts
- C10M 2219/089: Overbased salts
- 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
- C10N 2010/04: Groups 2 or 12
- C10N 2020/04: Molecular weight; Molecular weight distribution
- C10N 2030/00: Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N 2030/04: Detergent property or dispersant property
- C10N 2030/10: Inhibition of oxidation, e.g. anti-oxidants
- C10N 2030/40: {Low content or no content compositions}
- C10N 2030/42: {Phosphor free or low phosphor content compositions}
- C10N 2030/43: {Sulfur free or low sulfur content compositions}
- C10N 2030/45: {Ash-less or low ash content}
- C10N 2040/25: Internal-combustion engines
- C10N 2040/255: {Gasoline engines}
- C10N 2060/14: by boron or a compound containing boron
- Y02T 10/12: Improving ICE efficiencies
- Y02T 10/30: Use of alternative fuels, e.g. biofuels
- C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## 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 an ashless dispersant. The ashless dispersant may be selected from succinimide compounds prepared from aliphatic or aromatic amines.

## Claims

### Claim 1

A lubricant composition comprising:
a base oil of lubricating viscosity;
0.5 to 2.2 wt % of a boron-containing polyisobutenyl succinimide ashless dispersant having a TBN of 30 to 70 and delivering 80 to 350 ppm of boron to the lubricating composition;
1.0 to 3.0 wt % of a boron-free polyisobutenyl succinimide dispersant having a TBN of 30 to 70;
0.2 to 0.5 wt % of a sulfurized olefin antioxidant;
0.2 to 1 wt % of a magnesium sulfonate detergent having a TBN of 300 to 500;
0.4 to 1.1 wt % of a zinc dialkyldithiophosphate antiwear agent; and
0.2 to 3 wt % of a calcium alkylbenzene sulfonate detergent.

### Claim 2 (depends on 1)

The composition 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.

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

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

### Claim 5 (depends on 4)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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.

### Claim 8

A lubricant composition comprising:
a base oil of lubricating viscosity;
0.5 to 2.2 wt % of a boron-containing polyisobutenyl succinimide ashless dispersant having a TBN of 30 to 70 and delivering 80 to 350 ppm of boron to the lubricating composition;
1.0 to 3.0 wt % of a boron-free polyisobutenyl succinimide dispersant having a TBN of 30 to 70;
0.2 to 0.5 wt % of a sulfurized olefin antioxidant;
0.2 to 1 wt % of a magnesium sulfonate detergent having a TBN of 300 to 500;
0.4 to 1.1 wt % of a zinc dialkyldithiophosphate antiwear agent; and
0.2 to 3 wt % of a calcium alkylbenzene sulfonate detergent,
wherein the lubricating composition is capable of reducing low speed pre-ignition events in a spark-ignited direct injection internal combustion engine operated under a load with a brake mean effective pressure (BMEP) of greater than or equal to 10 bars.