# US 2018/0320640 A1 · Long-route egr system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0320640 A1 - Document ID: US20180320640A1 - Status: Published application - Kind: A1 - Application number: 15/589,177 - Filed: 2017-05-08 - Published: 2018-11-08 - Earliest claimed: 2017-05-08 - Assignees: GM Global Technology Operations LLC - Applicants: GM Global Technology Operations LLC - Inventors: Alberto RACCA - Web page: https://patentgrep.com/patent/US20180320640A1 ## CPC - 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 - F01N 3/00: Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N11/00) - F02M 26/22: with coolers in the recirculation passage - F02M 26/48: EGR valve position sensors (details of the sensor installation in the valve housing F02M26/72) - F02M 26/65: Constructional details of EGR valves - F02M 26/70: Flap valves; Rotary valves; Sliding valves; Resilient valves - F02M 26/71: Multi-way valves - Y02T 10/12: Improving ICE efficiencies - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Exhaust gas recirculation systems are provided for an internal combustion engine. The system includes an exhaust conduit configured to receive exhaust gas from the internal combustion engine. A junction is disposed to receive the exhaust gas from the exhaust conduit. An EGR conduit is connected with the junction and configured to recirculate a portion of the exhaust gas to the internal combustion engine. A tailpipe is connected with the junction and configured to discharge at least a portion of the exhaust gas to atmosphere. A control valve is disposed at the junction and is configured to control entry of the exhaust gas into the EGR conduit, and the control valve is configured to throttle entry of the exhaust gas into the tailpipe. ## Claims ### Claim 1 An exhaust gas recirculation (EGR) system for an internal combustion engine, comprising: an exhaust conduit configured to receive exhaust gas from the internal combustion engine; a junction coupled to the exhaust conduit for receiving the exhaust gas therefrom; an EGR conduit connected with the junction and configured to recirculate a portion of the exhaust gas to an intake side of the internal combustion engine; a tailpipe connected coupled to the junction and configured to discharge at least a portion of the exhaust gas to atmosphere; and a control valve disposed at the junction and operably configured to control entry of the exhaust gas into the EGR conduit and to throttle entry of the exhaust gas into the tailpipe. ### Claim 2 (depends on 1) The exhaust gas recirculation system of claim 1, further comprising: a compressor configured to charge combustion air supplied to the internal combustion engine, the compressor having an inlet end configured to receive the combustion air; an intake duct connected with the compressor at the inlet end and configured to supply the combustion air to the compressor, wherein the EGR conduit is connected with the intake duct to supply EGR gas to the inlet end of the compressor. ### Claim 3 (depends on 2) The exhaust gas recirculation system of claim 2, wherein intake duct does not include a throttle valve. ### Claim 4 (depends on 1) The exhaust gas recirculation system of claim 1, wherein control valve comprises: a promontory formed at the junction dividing the EGR conduit from the tailpipe and extending to a tip; and a valve plate disposed to pivot about the tip. ### Claim 5 (depends on 4) The exhaust gas recirculation system of claim 4, wherein the promontory bisects the exhaust conduit. ### Claim 6 (depends on 4) The exhaust gas recirculation system of claim 4, wherein the valve plate comprises a terminal end positionable upstream of the tip in the exhaust conduit when the valve plate is in a closed position for closing the EGR conduit from the exhaust conduit. ### Claim 7 (depends on 1) The exhaust gas recirculation system of claim 1 further comprising: a valve plate in the control valve; and a position sensor associated with the control valve and configured to determine a position of the valve plate. ### Claim 8 (depends on 1) The exhaust gas recirculation system of claim 1 further comprising: a compressor configured to charge combustion air supplied to the internal combustion engine, the compressor having an inlet end configured to receive the combustion air, wherein the EGR conduit is configured to supply EGR gas to the inlet end of the compressor; an intake duct connected with the compressor and configured to supply the combustion air to the compressor; an EGR cooler connected with the EGR conduit; and a second EGR conduit extending from the EGR cooler to the intake duct, wherein the second EGR conduit and the intake duct do not include a throttle valve. ### Claim 9 (depends on 8) The exhaust gas recirculation system of claim 8, wherein the EGR conduit and the tailpipe extend away from the junction in opposite directions. ### Claim 10 (depends on 1) The exhaust gas recirculation system of claim 1, further comprising a turbine receiving the exhaust gas from the internal combustion engine, the junction located downstream of the turbine from the internal combustion engine. ### Claim 11 An exhaust gas recirculation (EGR) system for an internal combustion engine, comprising: an exhaust conduit configured to receive exhaust gas from the internal combustion engine; an exhaust aftertreatment system disposed in the exhaust conduit; a junction coupled to the exhaust conduit for receiving the exhaust gas therefrom and located downstream of at least a portion of the aftertreatment system from the internal combustion engine; an EGR conduit connected with the junction and configured to recirculate a portion of the exhaust gas to an intake side of the internal combustion engine; a tailpipe connected to the junction and configured to discharge at least a portion of the exhaust gas to atmosphere; and a control valve disposed at the junction with a valve plate in the control valve configured to control entry of the exhaust gas into the EGR conduit and the valve plate configured to throttle entry of the exhaust gas into the tailpipe. a control valve disposed at the junction and having a valve plate operably configured to control entry of the exhaust gas into the EGR conduit and to throttle entry of the exhaust gas into the tailpipe. ### Claim 12 (depends on 11) The exhaust gas recirculation system of claim 11, further comprising: a compressor configured to charge combustion air supplied to the internal combustion engine, the compressor having an inlet end configured to receive the combustion air; an intake duct connected with the compressor at the inlet end and configured to supply the combustion air to the compressor, wherein the EGR conduit is connected with the intake duct to supply EGR gas to the inlet end of the compressor. ### Claim 13 (depends on 12) The exhaust gas recirculation system of claim 12, wherein intake duct does not include a throttle valve. ### Claim 14 (depends on 11) The exhaust gas recirculation system of claim 11, wherein control valve comprises a promontory formed at the junction dividing the EGR conduit from the tailpipe and extending to a tip, wherein the valve plate disposed to pivot about the tip. ### Claim 15 (depends on 14) The exhaust gas recirculation system of claim 14, wherein the promontory bisects the exhaust conduit. ### Claim 16 (depends on 14) The exhaust gas recirculation system of claim 14, wherein the valve plate comprises a terminal end positionable upstream of the tip in the exhaust conduit when the valve plate is in a closed position for closing the EGR conduit from the exhaust conduit. ### Claim 17 (depends on 11) The exhaust gas recirculation system of claim 11 further comprising a position sensor associated with the control valve and configured to determine a position of the valve plate. ### Claim 18 (depends on 11) The exhaust gas recirculation system of claim 11 further comprising: a compressor configured to charge combustion air supplied to the internal combustion engine, the compressor having an inlet end configured to receive the combustion air, wherein the EGR conduit is configured to supply EGR gas to the inlet end of the compressor; an intake duct connected with the compressor and configured to supply the combustion air to the compressor; an EGR cooler connected with the EGR conduit; and a second EGR conduit extending from the EGR cooler to the intake duct, wherein the second EGR conduit and the intake duct do not include a throttle valve. ### Claim 19 (depends on 18) The exhaust gas recirculation system of claim 18, further comprising an exhaust manifold receiving the exhaust gas from the engine; an intake manifold configured to deliver the combustion air to the internal combustion engine; and an EGR conduit configured to channel exhaust gas from the exhaust manifold to the intake manifold. ### Claim 20 An exhaust gas recirculation (EGR) system for an internal combustion engine, comprising: a turbine configured to receive exhaust gas from the internal combustion engine; a compressor connected with the turbine and configured to charge combustion air supplied to the internal combustion engine, the compressor having an inlet end configured to receive the combustion air; an intake duct connected with the compressor and configured to supply the combustion air to the inlet end; an exhaust conduit configured to receive the exhaust gas from the turbine; a junction coupled to the exhaust conduit for receiving the exhaust gas therefrom; an EGR conduit connected with the junction and configured to recirculate a portion of the exhaust gas to an intake side of the internal combustion engine through the compressor; a tailpipe connected with the junction and configured to discharge at least a portion of the exhaust gas to atmosphere; and a control valve disposed at the junction with a valve plate configured to control entry of the exhaust gas into the EGR conduit and the valve plate configured to throttle entry of the exhaust gas into the tailpipe. a control valve disposed at the junction and having a valve plate operably configured to control entry of the exhaust gas into the EGR conduit and to throttle entry of the exhaust gas into the tailpipe.