# US 2014/0360170 A1 · Exhaust system of an internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360170 A1 - Document ID: US20140360170A1 - Status: Published application - Kind: A1 - Application number: 14/299,368 - Filed: 2014-06-09 - Published: 2014-12-11 - Earliest claimed: 2013-06-10 - Assignees: Eberspächer Exhaust Technology GmbH & Co. KG - Applicants: Eberspacher Exhaust Technology GmbH & Co. KG - Inventors: Felix HACKLÄNDER - Web page: https://patentgrep.com/patent/US20140360170A1 ## CPC - F01N 3/2066: {Selective catalytic reduction [SCR]} - F01N 3/035: with catalytic reactors - F01N 3/24: characterised by constructional aspects of converting apparatus (filtering in combination with catalytic reactors F01N3/035) - F01N 3/28: Construction of catalytic reactors - F01N 3/2882: {Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices (combined with absorbents or adsorbents only F01N3/0814; combined with particulate filters F01N3/035)} - F01N 3/2892: {Exhaust flow directors or the like, e.g. upstream of catalytic device} - F01N 13/0097: {the purifying devices are arranged in a single housing} - F01N 13/18: Construction facilitating manufacture, assembly, or disassembly - F01N 2240/20: a flow director or deflector - F01N 2470/08: Exhaust gas passages being formed between the walls of an outer shell and an inner chamber - F01N 2610/02: the substance being ammonia or urea - F01N 2610/1453: Sprayers or atomisers; Arrangement thereof in the exhaust apparatus - Y02T 10/12: Improving ICE efficiencies - 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 An exhaust system (1) of an internal combustion engine includes an oxidation catalytic converter (2), a particle filter (3), an injector (4) for injecting a reducing agent, a static mixer-evaporator (5), an SCR catalytic converter (6) and a housing (8). The oxidation catalytic converter is upstream of the particle filter and upstream of the SCR catalytic converter. The injector is upstream of the mixer-evaporator and the mixer-evaporator is upstream of the SCR catalytic converter. The housing has a centrally inner channel (9), a ring channel (10) concentrically around the inner channel, an eccentrically outer channel (11), a first deflecting chamber (12) connecting the outer channel with the ring channel and a second deflecting chamber (13) connecting the inner channel with the ring channel. The mixer-evaporator is in the inner channel and the oxidation catalytic converter or particle filter or SCR catalytic converter is ring-shaped and in the ring channel. ## Claims ### Claim 1 An exhaust system of an internal combustion engine, the exhaust system comprising: an oxidation catalytic converter; a particle filter; an injector for injecting a reducing agent; a static mixer-evaporator; an selective catalytic reduction catalytic converter; a housing comprising a centrally arranged inner channel, a ring channel arranged concentrically around the inner channel, an eccentrically arranged outer channel, a first deflecting chamber connecting the outer channel with the ring channel, and a second deflecting chamber connecting the inner channel with the ring channel, to form an exhaust gas flow path, wherein: the oxidation catalytic converter is arranged upstream of the particle filter and upstream of the SCR catalytic converter, with respect to the exhaust gas flow path; the injector is arranged upstream of the mixer-evaporator and the mixer-evaporator is arranged upstream of the SCR catalytic converter, with respect to the exhaust gas flow path; the mixer-evaporator is arranged in the inner channel; and the oxidation catalytic converter or the particle filter or the SCR catalytic converter is of a ring-shaped design and is arranged in the ring channel. ### Claim 2 (depends on 1) An exhaust system in accordance with claim 1, wherein: a housing inlet is formed at the outer channel; and the injector is arranged coaxially to the inner channel at the second deflecting chamber. ### Claim 3 (depends on 2) An exhaust system in accordance with claim 2, wherein: the oxidation catalytic converter is arranged in the ring channel; the mixer-evaporator is arranged upstream of at least one of the particle filter and the SCR catalytic converter; and the injector injects the reducing agent into the second deflecting chamber. ### Claim 4 (depends on 2) An exhaust system in accordance with claim 2, wherein at least one of the particle filter and the SCR catalytic converter is arranged downstream of the mixer-evaporator, in the inner channel. ### Claim 5 (depends on 2) An exhaust system in accordance with claim 2, wherein at least one of the particle filter and the SCR catalytic converter is arranged downstream of the inner channel, outside the housing in a separate housing. ### Claim 6 (depends on 1) An exhaust system in accordance with claim 1, wherein: a housing inlet is formed at the inner channel; and the injector is arranged at the inner channel. ### Claim 7 (depends on 6) An exhaust system in accordance with claim 6, wherein: at least one of the particle filter and the SCR catalytic converter is arranged in the ring channel; the mixer-evaporator is arranged upstream of the particle filter; and the injector injects the reducing agent into the inner channel. ### Claim 8 (depends on 6) An exhaust system in accordance with claim 6, wherein the oxidation catalytic converter is arranged upstream of the inner channel, outside the housing in a separate housing. ### Claim 9 (depends on 1) An exhaust system in accordance with claim 1, wherein the mixer-evaporator is arranged between the oxidation catalytic converter and the particle filter in terms of flow. ### Claim 10 (depends on 1) An exhaust system in accordance with claim 1, wherein the injector injects the reducing agent between the oxidation catalytic converter and the particle filter in terms of flow. ### Claim 11 (depends on 1) An exhaust system in accordance with claim 1, wherein a flow deflection by up to 180° takes place in the first deflecting chamber. ### Claim 12 (depends on 1) An exhaust system in accordance with claim 1, wherein a flow deflection by up to 180° takes place in the second deflecting chamber. ### Claim 13 (depends on 1) An exhaust system in accordance with claim 1, wherein a housing inlet and a housing outlet define parallel directions of flow. ### Claim 14 (depends on 1) An exhaust system in accordance with claim 1, wherein: the ring channel extends radially between an inner pipe and a pot, into which the inner pipe protrudes; the inner channel extends in the inner pipe; and the outer channel extends in an outer pipe, which is arranged outside the pot. ### Claim 15 (depends on 14) An exhaust system in accordance with claim 14, wherein: the first deflecting chamber is arranged in a pot cover, which connects the pot with the outer pipe; and the second deflecting chamber is arranged within the pot in the area of a pot bottom. ### Claim 16 An exhaust system of an internal combustion engine, the exhaust system comprising: a housing comprising a centrally arranged inner channel, a ring channel arranged concentrically around the inner channel, an eccentrically arranged outer channel, a first deflecting chamber connecting the outer channel with the ring channel, and a second deflecting chamber connecting the inner channel with the ring channel, the housing having a housing inlet and a housing outlet, the channels and deflecting chambers forming an exhaust gas flow path from the upstream housing inlet to the downstream housing outlet; an injector for injecting a reducing agent; a static mixer-evaporator arranged in the inner channel; a selective catalytic reduction (SCR) catalytic converter, the injector being arranged upstream of the mixer-evaporator and the mixer-evaporator being arranged upstream of the SCR catalytic converter; an oxidation catalytic converter; and a particle filter, the oxidation catalytic converter being arranged upstream of the particle filter and upstream of the SCR catalytic converter and at least one of the oxidation catalytic converter, the particle filter and the SCR catalytic converter having a ring-shaped design and being arranged in the ring channel. ### Claim 17 (depends on 16) An exhaust system in accordance with claim 16, wherein: the housing inlet is formed at the outer channel; and the injector is arranged coaxially to the inner channel at the second deflecting chamber. ### Claim 18 (depends on 17) An exhaust system in accordance with claim 17, wherein: the oxidation catalytic converter is arranged in the ring channel; the mixer-evaporator is arranged upstream of at least one of the particle filter and the SCR catalytic converter; and the injector injects the reducing agent into the second deflecting chamber. ### Claim 19 (depends on 16) An exhaust system in accordance with claim 16, wherein: the housing inlet is formed at the inner channel; and the injector is arranged at the inner channel. ### Claim 20 (depends on 19) An exhaust system in accordance with claim 19, wherein: at least one of the particle filter and the SCR catalytic converter is arranged in the ring channel; the mixer-evaporator is arranged upstream of the particle filter; and the injector injects the reducing agent into the inner channel.