# US 10,767,545 B2 · Method of pre-heating a internal combustion engine by oil and jacket water cooler > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,545 B2 - Document ID: US10767545B2 - Status: Granted - Kind: B2 - Application number: 16/273,313 - Filed: 2019-02-12 - Published: 2019-08-22 - Granted: 2020-09-08 - Earliest claimed: 2018-02-21 - Assignees: Innio Jenbacher GmbH & Co OG - Applicants: INNIO Jenbacher GmbH & Co OG - Inventors: Mario Rainer - Web page: https://patentgrep.com/patent/US10767545B2 ## CPC - F01P 5/12: Pump-driving arrangements - F01M 5/02: Conditioning lubricant for aiding engine starting, e.g. heating - F01P 3/20: Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence) - F02G 5/00: Profiting from waste heat of combustion engines, not otherwise provided for - F02N 19/10: by heating of engine coolants - F01P 7/048: {using electrical drives} - F01P 2005/125: {Driving auxiliary pumps electrically} - F01P 2031/30: Cooling after the engine is stopped - F01P 2060/02: Intercooler - F01P 2060/12: Turbo charger - F01P 2060/18: Heater - F02B 29/0443: {Layout of the coolant or refrigerant circuit} - Y02T 10/12: Improving ICE efficiencies - F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28) - F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING - F02G: HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS (steam engine plants, special vapour plants, plants operating on either hot gas or combustion-product gases together with other fluid F01K; gas-turbine plants F02C; jet-propulsion plants F02K); USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR - F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Provided is an internal combustion engine, comprising at least one cooling device for cooling at least one operational liquid of the internal combustion engine during and/or after operation of the internal combustion engine. The at least one cooling device has at least one heat exchanger and lines for transporting the at least one operational liquid to and from the at least one heat exchanger. The heat exchanger exchanges heat with a cooling medium, which cooling medium has during the operation of the internal combustion engine a lower temperature than the at least one operational liquid of the internal combustion engine. Heat is exchanged by the heat exchanger between the at least one operational liquid and the cooling medium, which cooling medium has before and/or during a starting operation of the internal combustion engine a higher temperature than the at least one operational liquid of the internal combustion engine. ## Claims ### Claim 1 An internal combustion engine, comprising: first and second coolers configured to cool a water and an oil, respectively, of the internal combustion engine after a starting operation and during and/or after operation of the internal combustion engine, wherein the first cooler comprises a first heat exchanger and one or more first lines for transporting the water to and from the first heat exchanger, and the second cooler comprises a second heat exchanger and one or more second lines for transporting the oil to and from the second heat exchanger; and a coolant supply line coupled to the first and second heat exchangers, wherein the coolant supply line is external from the internal combustion engine, wherein the first and second heat exchangers are configured to exchange heat between a coolant and the water and the oil, respectively, wherein the coolant has during the operation of the internal combustion engine a lower temperature than that of the water and the oil of the internal combustion engine; wherein during and/or before the starting operation of the internal combustion engine the first and second coolers are configured to pre-heat the internal combustion engine by the first and second heat exchangers exchanging heat between the coolant and the water and the oil, respectively, wherein the coolant has before and/or during the starting operation of the internal combustion engine a higher temperature level than that of the water and the oil of the internal combustion engine. ### Claim 2 (depends on 1) The internal combustion engine as set forth in claim 1, comprising at least one pump, configured to pump at least one of the water or the oil to and from the first or second heat exchanger, respectively, before and/or during the starting operation of the internal combustion engine. ### Claim 3 (depends on 2) The internal combustion engine as set forth in claim 2, wherein the at least one pump is coupled to a bypass line, wherein the bypass line can be fluidically connected to the first or second heat exchanger before and/or during the starting operation of the internal combustion engine. ### Claim 4 (depends on 1) The internal combustion engine as set forth in claim 1, wherein the first cooler is configured to cool at least one cooling water circuit of the internal combustion engine, wherein the second cooler is configured to cool at least one oil circuit of the internal combustion engine, and wherein the at least one cooling water circuit and the at least one oil circuit of the internal combustion engine can be heated by the first and second coolers before and/or during the starting operation of the internal combustion engine. ### Claim 5 (depends on 1) The internal combustion engine as set forth in claim 1, further comprising at least one additional cooler for at least one external component of the internal combustion engine, wherein the at least one additional cooler is configured to heat the at least one external component of the internal combustion engine before and/or during the starting operation of the internal combustion engine. ### Claim 6 (depends on 5) The internal combustion engine as set forth in claim 5, wherein the at least one external component of the internal combustion engine is a turbo charger and/or an intercooler and/or a fuel cooler. ### Claim 7 A method for pre-heating an internal combustion engine, the method comprising: cooling, with a coolant supplied via a coolant supply line to first and second heat exchangers, a water and an oil, respectively, of the internal combustion engine after a starting operation and during and/or after operation of the internal combustion engine, wherein the coolant has during the operation of the internal combustion engine a lower temperature than that of the water and the oil of the internal combustion engine, wherein the coolant supply line is external from the internal combustion engine; and pre-heating, with the coolant supplied via the coolant supply line to first and second heat exchangers, the water and the oil, respectively, of the internal combustion engine before and/or during the starting operation of the internal combustion engine, wherein the coolant has before and/or during the starting operation of the internal combustion engine a higher temperature than that of the water and the oil of the internal combustion engine. ### Claim 8 (depends on 7) The method as set forth in claim 7, comprising: pumping, via a first pump, the water through the first heat exchanger to exchange heat with the coolant before and/or during the starting operation; and pumping, via a second pump, the oil through the second heat exchanger to exchange heat with the coolant before and/or during the starting operation. ### Claim 9 (depends on 8) The method as set forth in claim 8, comprising: routing the water through a first bypass line coupled to an engine water circuit before and/or during the starting operation, wherein the first bypass line comprises the first pump; and routing the oil through a second bypass line coupled to an engine oil circuit before and/or during the starting operation, wherein the second bypass line comprises the second pump. ### Claim 10 (depends on 8) The method as set forth in claim 8, comprising: driving the first pump independent from the internal combustion engine; and driving the second pump independent from the internal combustion engine. ### Claim 11 A system, comprising: an engine water circuit configured to circulate water through an internal combustion engine; an engine oil circuit configured to circulate oil through an internal combustion engine; a first heat exchanger coupled to the engine water circuit, wherein a first flow of coolant is configured to flow through the first heat exchanger to exchange heat with the water in the engine water circuit, the first flow of coolant through the first heat exchanger is configured to pre-heat the water before or during a startup operation of the internal combustion engine, and the first flow of coolant through the first heat exchanger is configured to cool the water during operation of the internal combustion engine after the startup operation; a second heat exchanger coupled to the engine oil circuit, wherein a second flow of coolant is configured to flow through the second heat exchanger to exchange heat with the oil in the engine oil circuit, the second flow of coolant through the second heat exchanger is configured to pre-heat the oil before or during the startup operation of the internal combustion engine, and the second flow of coolant through the second heat exchanger is configured to cool the oil during operation of the internal combustion engine after the startup operation; and a coolant supply line coupled to the first and second heat exchangers, wherein the coolant supply line is external from the internal combustion engine, and the coolant supply line is configured to supply the first and second flows of coolant. ### Claim 12 (depends on 11) The system as set forth in claim 11, wherein the first and second heat exchangers are coupled to a coolant circuit configured to circulate the first and second flows of coolant through the first and second heat exchangers. ### Claim 13 (depends on 12) The system as set forth in claim 12, wherein the first and second heat exchangers are arranged in series. ### Claim 14 (depends on 11) The system as set forth in claim 11, comprising: a first pump configured to circulate the water through the first heat exchanger before or during the startup operation; and a second pump configured to circulate the oil through the second heat exchanger before or during the startup operation. ### Claim 15 (depends on 14) The system as set forth in claim 14, wherein the first pump is configured to be driven independent from the internal combustion engine, and the second pump is configured to be driven independent from the internal combustion engine. ### Claim 16 (depends on 15) The system as set forth in claim 15, comprising: a third pump configured to circulate the water through the first heat exchanger during operation of the internal combustion engine after the startup operation, wherein the third pump is driven by the internal combustion engine. ### Claim 17 (depends on 14) The system as set forth in claim 14, wherein the first pump is disposed along a first bypass line coupled to the engine water circuit, and the second pump is disposed along a second bypass line coupled to the engine oil circuit. ### Claim 18 (depends on 17) The system as set forth in claim 17, wherein the first and second bypass lines exclude preheaters. ### Claim 19 (depends on 14) The system as set forth in claim 14, wherein the first pump comprises a first electric pump and the second pump comprises a second electric pump. ### Claim 20 (depends on 11) The system as set forth in claim 11, comprising the internal combustion engine.