# US 2020/0399555 A1 · Lubricant compositions for direct injection engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399555 A1 - Document ID: US20200399555A1 - Status: Published application - Kind: A1 - Application number: 17/010,932 - 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/US20200399555A1 ## 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 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; 0.5 to 2.2 wt % of a boron-containing ashless dispersant; 0.1 to 3 wt % of at least one ashless antioxidant; and 0.2 to 1 wt % of a magnesium detergent. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) The method of claim 1, wherein the engine is operated at speeds less than or equal to 3,000 rpm. ### Claim 4 (depends on 1) The method 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 method 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 method of claim 1, wherein the boron-containing ashless dispersant is a polyalkenyl dispersant derived from acylated polyisobutylene. ### Claim 7 (depends on 1) The method of claim 1, wherein the boron-containing ashless dispersant comprises a polyisobutylene succinimide compound. ### Claim 8 (depends on 7) 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. ### Claim 9 (depends on 6) 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. ### Claim 10 (depends on 1) The method of claim 1, further comprising from 0.1 to 5 wt % of a boron-free ashless dispersant. ### Claim 11 (depends on 10) The method of claim 10, wherein the boron-free ashless dispersant is a polyisobutylene succinimide dispersant prepared from a polyisobutylene having an average number molecular weight (Mn) of from 500 to 5000. ### Claim 12 (depends on 1) The method of claim 1, wherein the at least one ashless antioxidant is a sulfurized olefin. ### Claim 13 (depends on 1) The method of claim 1, wherein the at least one ashless antioxidant includes two or more antioxidants where each antioxidant is present in the lubricating composition in an amount of at least 0.1 wt %. ### Claim 14 (depends on 13) The method of claim 13, wherein the total amount of antioxidant present in the lubricating composition is from 0.5 to 5 wt %. ### Claim 15 (depends on 14) The method of claim 14, wherein each antioxidant is present in an amount of 0.25 to 3 wt %. ### Claim 16 (depends on 1) The method of claim 1, wherein the magnesium detergent is selected from a magnesium sulfonate detergent and a magnesium salicylate detergent. ### Claim 17 (depends on 1) The method of claim 1, wherein the lubricant composition further comprises at least one other additive selected from a metal containing overbased detergent, a phosphorus-containing anti-wear additive, a friction modifier, and a polymeric viscosity modifier. ### Claim 18 (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.