# US 10,865,745 B2 · Air intake heater system for a combustion engine, method for heating intake air and a vehicle comprising such a system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,745 B2 - Document ID: US10865745B2 - Status: Granted - Kind: B2 - Application number: 16/379,850 - Filed: 2019-04-10 - Published: 2019-10-24 - Granted: 2020-12-15 - Earliest claimed: 2018-04-23 - Assignees: Volvo Car Corporation - Applicants: Volvo Car Corporation - Inventors: Karsten Rohrssen; Peter Svensson; Richard Sebestyen; Håkan Persson - Web page: https://patentgrep.com/patent/US10865745B2 ## CPC - F02M 26/42: having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders - F02M 26/05: High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor - F02M 26/06: Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor - F02M 26/09: Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine - F02M 26/27: with air-cooled heat exchangers - F02M 26/30: Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine - F02M 26/35: with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters - F02M 31/042: {Combustion air} - F02M 31/08: the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)} - F02M 31/13: Combustion air - F02M 35/10268: {Heating, cooling or thermal insulating means (air coolers F02B29/04; thermal treatment of combustion-air, fuel or fuel-air mixture F02M31/00; details of the throttle valve housing F02D9/1035)} - F02B 29/04: Cooling of air intake supply - F02B 37/00: Engines characterised by provision of pumps driven at least for part of the time by exhaust - Y02T 10/12: Improving ICE efficiencies - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - 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 An air intake heater system for a combustion engine, comprising; a turbocharger, a high pressure EGR conduit, a low pressure EGR conduit, and an air intake conduit, where the system comprises a heat exchanger arranged upstream of the turbocharger, where the heat exchanger comprises a first flow channel connecting an air inlet to an inlet of the turbocharger and a second flow channel, where the second flow channel is part of the high pressure EGR conduit. The advantage of the invention is that intake air and low pressure EGR gas can be heated by the high pressure EGR gas, and that high pressure EGR gas can be cooled by intake air. ## Claims ### Claim 1 An air intake heater system for a combustion engine, comprising: a turbocharger having a compressor inlet, a compressor outlet, a turbine inlet and a turbine outlet; a high pressure EGR conduit having an inlet connected to the turbine inlet and an outlet connected to an intake manifold; a low pressure EGR conduit having an inlet connected to the turbine outlet and an outlet connected to the compressor inlet; and an air intake conduit having an inlet connected to the compressor outlet and an outlet connected to the intake manifold, wherein the system comprises a heat exchanger arranged upstream of the compressor inlet, wherein the heat exchanger comprises a first flow channel connecting an air inlet to the compressor inlet and a second flow channel, wherein the second flow channel is part of the high pressure EGR conduit, and wherein the outlet of the low pressure EGR conduit is arranged downstream of the heat exchanger. ### Claim 2 (depends on 1) The system according to claim 1, wherein the inlet of the low pressure EGR conduit is arranged downstream of an aftertreatment device arranged downstream of the combustion engine. ### Claim 3 (depends on 1) The system according to claim 1, wherein the low pressure EGR conduit is provided with a valve that can be controlled continuously between an open and a closed state. ### Claim 4 (depends on 1) The system according to claim 1, wherein the high pressure EGR conduit is provided with a valve that can be controlled continuously between an open and a closed state. ### Claim 5 (depends on 1) The system according to claim 1, wherein the air intake conduit is provided with a valve that can be controlled continuously between an open and a closed state. ### Claim 6 (depends on 1) A vehicle comprising a system according to claim 1. ### Claim 7 (depends on 6) The vehicle according to claim 6, wherein the vehicle further comprises at least one exhaust aftertreatment device arranged downstream of the turbocharger. ### Claim 8 (depends on 7) The vehicle according to claim 7, wherein the exhaust aftertreatment device is a catalytic converter. ### Claim 9 A method for heating intake air in a combustion engine comprising a turbocharger, comprising the following steps: leading inlet air from an air inlet through a heat exchanger to an inlet of the turbocharger in a first flow channel, leading high pressure EGR gas through the heat exchanger through a second flow channel to an intake manifold, and recirculating low pressure EGR gas from an outlet of the turbocharger to the inlet of the turbocharger downstream of the heat exchanger. ### Claim 10 (depends on 9) The method according to claim 9, wherein the method comprises the step of leading low pressure EGR gas to the inlet of the turbocharger. ### Claim 11 (depends on 9) The method according to claim 9, wherein the method comprises the step of closing the flow of high pressure EGR gas to the intake manifold partly or completely when the intake air mixture has reached a predefined temperature.