# US 10,502,166 B2 · EGR system with particle filter and wastegate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,166 B2 - Document ID: US10502166B2 - Status: Granted - Kind: B2 - Application number: 15/574,660 - Filed: 2016-05-25 - Published: 2018-05-10 - Granted: 2019-12-10 - Earliest claimed: 2015-05-26 - Assignees: Tenneco Inc. - Applicants: Tenneco GmbH - Inventors: Michael Fischer - Web page: https://patentgrep.com/patent/US10502166B2 ## CPC - F02M 26/04: with a single turbocharger - F02B 37/18: by bypassing exhaust {from the inlet to the outlet of turbine or to the atmosphere} - 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 26/07: Mixed pressure loops, i.e. wherein recirculated exhaust gas is either taken out upstream of the turbine and reintroduced upstream of the compressor, or is taken out downstream of the turbine and reintroduced downstream of the compressor - F02M 26/22: with coolers in the recirculation passage - F02M 26/35: with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters - F02M 26/44: in which a main EGR passage is branched into multiple passages - F02M 35/02: Air cleaners - 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 The invention relates to an exhaust gas conducting system for a gasoline engine, comprising an exhaust gas line which can be connected to an exhaust manifold of the gasoline engine, an inlet line which can be connected to an intake manifold of the gasoline engine, and a turbine which is arranged in the exhaust gas line. At least one exhaust gas recirculation line is provided which opens into the inlet line, and the exhaust gas line has a bypass line which opens into the exhaust gas line downstream of the turbine, wherein a) the exhaust gas recirculation line branches off upstream of the turbine, and the bypass line branches off to the exhaust gas recirculation line or b) the bypass line branches off upstream of the turbine, and the exhaust gas recirculation line branches off to the bypass line, wherein c) at least one particle filter is arranged in the exhaust gas recirculation line or in the bypass line upstream of the exhaust gas recirculation line or in the exhaust gas line upstream of the exhaust gas recirculation line. ## Claims ### Claim 1 An exhaust gas conducting system for a gasoline engine, comprising an exhaust gas line adapted to be connected to an exhaust manifold of the gasoline engine, an inlet line adapted to be connected to an intake manifold of the gasoline engine, and a turbine which is arranged in the exhaust gas line, wherein at least one exhaust gas recirculation line having an EGR valve is provided which opens into the inlet line, and that the exhaust gas line has at least one bypass line with a bypass choke flap valve, which opens into the exhaust gas line downstream of the turbine, wherein a) the at least one exhaust gas recirculation line branches off upstream of the turbine, and the at least one bypass line branches off to the at least one exhaust gas recirculation line, or b) the at least one bypass line branches off upstream of the turbine, and the at least one exhaust gas recirculation line branches off to the at least one bypass line, wherein c) at least one particle filter is arranged in the at least one exhaust gas recirculation line or in the at least one bypass line upstream of the at least one exhaust gas recirculation line or in the exhaust gas line upstream of the at least one exhaust gas recirculation line, wherein, d) an exhaust gas flap valve is positioned within the exhaust gas line downstream of the turbine and upstream of an opening to the at least one exhaust gas recirculation line or the at least one bypass line to influence a flow resistance of the exhaust gas turbine, wherein for the purpose of higher load operation of the gasoline engine, the at least one bypass line and simultaneously the at least one exhaust gas recirculation line are acted on with exhaust gas, wherein the at least one particle filter has a catalytically acting coating for the conversion of CO, HC and NOx and an exhaust gas catalytic converter configured as 3-way catalytic converter is provided downstream of the turbine. ### Claim 2 (depends on 1) The exhaust gas conducting system according to claim 1, wherein a cooler is provided inside the at least one exhaust gas recirculation line downstream of the at least one particle filter. ### Claim 3 (depends on 1) The exhaust gas conducting system according to claim 1, wherein the inlet line upstream of the opening of the at least one exhaust gas recirculation line is configured as a fresh air line, and that at least one fresh air cooler and one fresh air choke flap valve are provided in the fresh air line. ### Claim 4 (depends on 1) The exhaust gas conducting system according to claim 1, wherein the inlet line downstream of the opening of the at least one exhaust gas recirculation line is configured as a charge-air line, and that at least one charge-air cooler is provided in the charge-air line. ### Claim 5 (depends on 1) The exhaust gas conducting system according to claim 1, wherein the EGR valve is provided in the at least one exhaust gas recirculation line that, depending on an operation point of the gasoline engine, adjusts an exhaust gas mass flow inside the at least one exhaust recirculation line. ### Claim 6 (depends on 1) The exhaust gas conducting system according to claim 1, wherein the bypass choke flap valve is provided inside the at least one bypass line that, depending on an operation point of the gasoline engine, adjusts an exhaust gas mass flow inside the at least one bypass line. ### Claim 7 (depends on 1) The exhaust gas conducting system according to claim 1, wherein an additional exhaust gas recirculation line having an additional EGR valve is provided, which branches off to the at least one exhaust gas recirculation line or branches off to the at least one bypass line, wherein the additional exhaust gas recirculation line opens into the inlet line upstream of a compressor. ### Claim 8 (depends on 1) The exhaust gas conducting system according to claim 1, wherein a device is provided for introducing secondary air into the at least one exhaust gas recirculation line and/or into the at least one bypass line. ### Claim 9 (depends on 1) A gasoline engine having an exhaust gas conducting system according to claim 1. ### Claim 10 A method for operating a gasoline engine having an exhaust gas conducting system comprising an exhaust gas line adapted to be connected to an exhaust manifold of the gasoline engine, an inlet line adapted to be connected to an intake manifold of the gasoline engine, and a turbine which is arranged in the exhaust gas line, wherein at least one exhaust gas recirculation line having an EGR valve is provided which opens into the inlet line, and that the exhaust gas line has at least one bypass line with a bypass choke flap valve, which opens into the exhaust gas line downstream of the turbine, wherein a) the at least one exhaust gas recirculation line branches off upstream of the turbine, and the at least one bypass line branches off to the at least one exhaust gas recirculation line, or b) the at least one bypass line branches off upstream of the turbine, and the at least one exhaust gas recirculation line branches off to the at least one bypass line, wherein c) at least one particle filter is arranged in the at least one exhaust gas recirculation line or in the at least one bypass line upstream of the at least one exhaust gas recirculation line or in the exhaust gas line upstream of the at least one exhaust gas recirculation line, wherein, for the purpose of higher load operation of the gasoline engine, the at least one bypass line and simultaneously the at least one exhaust gas recirculation line are acted on with exhaust gas, wherein the at least one particle filter has a catalytically acting coating for the conversion of CO, HC and NOx and an exhaust gas catalytic converter configured as 3-way catalytic converter is provided downstream of the turbine, wherein d) during an operation of the gasoline engine, with the EGR valve in a partially open position, at least a part of the exhaust gas flow is conveyed through the at least one particle filter and through the at least one bypass line, wherein a regeneration of the at least one particle filter takes place; e) during and after the start of the gasoline engine, with the EGR valve at least partially closed, by opening the bypass choke flap valve, at least a part of the exhaust gas flow is conveyed through the at least one particle filter and through the at least one bypass line past the turbine, until a predetermined state requires the closing of the at least one bypass line; f) during the higher load operation of the gasoline engine, the at least one bypass line is used as a wastegate for conveying at least a part of the exhaust gas flow past the turbine, wherein a regeneration of the at least one particle filter is carried out. ### Claim 11 (depends on 10) The method according to claim 10, further including introducing secondary air into the at least one exhaust gas recirculation line and/or into the at least one bypass line by a device while simultaneously a) opening the EGR valve and conveying exhaust gas through the at least one bypass line, or b) closing the EGR valve and conveying exhaust gas through the at least one bypass line. ### Claim 12 (depends on 10) The method according to claim 10, further including introducing secondary air into the EGR line. ### Claim 13 (depends on 11) The method according to claim 11, wherein the secondary air is introduced into the EGR line. ### Claim 14 A gasoline engine having an exhaust gas conducting system comprising an exhaust gas line adapted to be connected to an exhaust manifold of the gasoline engine, an inlet line adapted to be connected to an intake manifold of the gasoline engine, and a turbine which is arranged in the exhaust gas line, wherein at least one exhaust gas recirculation line having an EGR valve is provided which opens into the inlet line, and that the exhaust gas line has at least one bypass line with a bypass choke flap valve, which opens into the exhaust gas line downstream of the turbine, wherein a) the at least one exhaust gas recirculation line branches off upstream of the turbine, and the at least one bypass line branches off to the at least one exhaust gas recirculation line, or b) the at least one bypass line branches off upstream of the turbine, and the at least one exhaust gas recirculation line branches off to the at least one bypass line, wherein c) at least one particle filter is arranged in the at least one exhaust gas recirculation line or in the at least one bypass line upstream of the at least one exhaust gas recirculation line or in the exhaust gas line upstream of the at least one exhaust gas recirculation line, wherein, for the purpose of higher load operation of the gasoline engine, the at least one bypass line and simultaneously the at least one exhaust gas recirculation line are acted on with exhaust gas, wherein the at least one particle filter has a catalytically acting coating for the conversion of CO, HC and NOx and an exhaust gas catalytic converter configured as 3-way catalytic converter is provided downstream of the turbine, wherein the inlet line upstream of the opening of the at least one exhaust gas recirculation line is configured as a fresh air line.