# US 10,119,482 B1 · Method for igniting fuels in engines > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,482 B1 - Document ID: US10119482B1 - Status: Granted - Kind: B1 - Application number: 15/629,789 - Filed: 2017-06-22 - Granted: 2018-11-06 - Earliest claimed: 2017-06-22 - Assignees: Caterpillar Inc. - Applicants: Caterpillar Inc. - Inventors: Charlie Chang-Won Kim - Web page: https://patentgrep.com/patent/US10119482B1 ## CPC - F02D 19/06: peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed - C10L 1/1258: {hydrogen peroxide, oxygenated water} - F02B 1/04: with fuel-air mixture admission into cylinder - F02B 1/12: with compression ignition (with fuel-air charge ignited by compression ignition of an additional fuel F02B7/00) - F02B 3/06: with compression ignition (compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02) - F02D 41/0025: {Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures} - F02D 41/3041: {with means for triggering compression ignition, e.g. spark plug} - F02P 23/04: Other physical ignition means, e.g. using laser rays - C10L 1/00: Liquid carbonaceous fuels - C10L 2270/02: for internal combustion engines - C10L 2290/14: Injection, e.g. in a reactor or a fuel stream during fuel production - F02P 23/00: Other ignition - Y02T 10/30: Use of alternative fuels, e.g. biofuels - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A method to ignite a fuel in an engine of an engine system is disclosed. The method includes introducing a mixture of air and a compound into a main combustion chamber of the engine. The compound includes a peroxide group. Next, the method includes controlling, by a controller, one or more parameters of the engine system to attain a temperature in the main combustion chamber within a temperature range. The compound decomposes into a radical within the temperature range. The method further includes injecting, by an injector, the fuel into the main combustion chamber upon the decomposition of the compound into the radical, causing an interaction of the fuel with the radical, thereby igniting the fuel. ## Claims ### Claim 1 An engine system, comprising: an engine having an intake manifold and a main combustion chamber adapted to receive a mixture of air and a compound through the intake manifold, wherein the compound includes a peroxide group; a controller configured to control one or more parameters of the engine system to attain a temperature in the main combustion chamber within a temperature range, wherein the compound decomposes into a radical within the temperature range; and an injector configured to inject a fuel into the main combustion chamber upon the decomposition of the compound into the radical, facilitating an interaction of the fuel with the radical and causing an ignition of the fuel. ### Claim 2 (depends on 1) The engine system of claim 1, wherein the compound includes one of a Hydrogen Peroxide (H2O2) or a combination of H2O2 and water (H2O). ### Claim 3 (depends on 1) The engine system of claim 1 further including a heater that is configured to generate heat to vaporize the compound. ### Claim 4 (depends on 1) The engine system of claim 1 further including at least one cooler configured to cool the air, wherein the one or more parameters of the engine system include an outlet temperature of the at least one cooler. ### Claim 5 (depends on 1) The engine system of claim 1, wherein the engine includes one or more intake valves to regulate an entry of the mixture into the main combustion chamber through the intake manifold, wherein the one or more parameters include a timing of opening and closing of the one or more intake valves. ### Claim 6 (depends on 1) The engine system of claim 1, wherein the engine includes an exhaust manifold and one or more exhaust valves to regulate an exit of residual gases of combustion from the main combustion chamber through the exhaust manifold, wherein the one or more parameters include a timing of opening and closing of the one or more exhaust valves. ### Claim 7 A method to ignite a fuel in an engine of an engine system, the method comprising: introducing a mixture of air and a compound into a main combustion chamber of the engine, the compound including a peroxide group; controlling, by a controller, one or more parameters of the engine system to attain a temperature in the main combustion chamber within a temperature range, wherein the compound decomposes into a radical within the temperature range; and injecting, by an injector, the fuel into the main combustion chamber upon the decomposition of the compound into the radical, causing an interaction of the fuel with the radical, thereby igniting the fuel. ### Claim 8 (depends on 7) The method of claim 7, wherein the radical is a hydroxyl (OH) radical. ### Claim 9 (depends on 7) The method of claim 7, wherein the compound includes one of a Hydrogen Peroxide (H2O2) or a combination of H2O2 and water (H2O). ### Claim 10 (depends on 7) The method of claim 7, wherein the fuel is one of diesel, hydrogen, or natural gas. ### Claim 11 (depends on 7) The method of claim 7, wherein the engine system includes at least one cooler configured to cool the air, wherein the one or more parameters includes an outlet temperature of the at least one cooler. ### Claim 12 (depends on 7) The method of claim 7, wherein the engine includes an intake manifold and one or more intake valves to regulate an entry of the mixture into the main combustion chamber through the intake manifold, wherein the one or more parameters include a timing of opening and closing of the one or more intake valves. ### Claim 13 (depends on 7) The method of claim 7, wherein the engine includes an exhaust manifold, and one or more exhaust valves to regulate an exit of residual gases of combustion from the main combustion chamber through the exhaust manifold, wherein the one or more parameters include a timing of opening and closing of the one or more exhaust valves. ### Claim 14 (depends on 7) The method of claim 7, wherein a percentage of the compound is less than 2% by volume relative to a total volume of the mixture. ### Claim 15 (depends on 7) The method of claim 7, wherein the temperature range is defined between 900 Kelvin to 1000 Kelvin. ### Claim 16 A method for operation of an engine of an engine system, the method comprising: introducing a mixture of air and hydrogen peroxide (H2O2) into a main combustion chamber of the engine; controlling, by a controller, one or more parameters of the engine system to attain a temperature in the main combustion chamber within a temperature range of 900 Kelvin to 1000 Kelvin, wherein the compound decomposes into a hydroxyl (OH) radical within the temperature range; and injecting, by an injector, a fuel into the main combustion chamber upon the decomposition of H2O2 into the OH radical, causing an interaction of the fuel with the OH radical, thereby igniting the fuel. ### Claim 17 (depends on 16) The method of claim 16, wherein a percentage of the H2O2 is less than 2% by volume relative to a total volume of the mixture. ### Claim 18 (depends on 16) The method of claim 16, wherein the engine system includes at least one cooler configured to cool the air, wherein the one or more parameters include an outlet temperature of the at least one cooler. ### Claim 19 (depends on 16) The method of claim 16, wherein the engine includes an intake manifold and one or more intake valves to regulate an entry of the mixture into the main combustion chamber through the intake manifold, wherein the one or more parameters include a timing of opening and closing of the one or more intake valves. ### Claim 20 (depends on 16) The method of claim 16, wherein the engine includes an exhaust manifold, and one or more exhaust valves to regulate an exit of residual gases of combustion from the main combustion chamber through the exhaust manifold, wherein the one or more parameters include a timing of opening and closing of the one or more exhaust valves.