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US20190376430A1 - Exhaust purification device - Google Patents

Exhaust purification device Download PDF

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Publication number
US20190376430A1
US20190376430A1 US16/483,254 US201816483254A US2019376430A1 US 20190376430 A1 US20190376430 A1 US 20190376430A1 US 201816483254 A US201816483254 A US 201816483254A US 2019376430 A1 US2019376430 A1 US 2019376430A1
Authority
US
United States
Prior art keywords
exhaust
aftertreatment device
emission control
control device
space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/483,254
Other languages
English (en)
Inventor
Tomoyuki Tsuruta
Hirofumi Tongu
Kuniharu Tobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hino Motors Ltd
Original Assignee
Hino Motors Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hino Motors Ltd filed Critical Hino Motors Ltd
Assigned to HINO MOTORS, LTD. reassignment HINO MOTORS, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TOBE, KUNIHARU, TONGU, HIROFUMI, TSURUTA, TOMOYUKI
Publication of US20190376430A1 publication Critical patent/US20190376430A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an exhaust emission control device.
  • a particulate filter for capturing particulates in exhaust gas is incorporated in an exhaust pipe and a selective reduction catalyst capable of selectively reacting NO x with ammonia even in the presence of oxygen is arranged downstream of the particulate filter, urea water as reducing agent being added at a position between the selective reduction catalyst and the particulate filter, thereby attaining lessening of both the particulates and NO x .
  • Such addition of the urea water to the selective reduction catalyst is conducted at the position between the particulate filter and the selective reduction catalyst.
  • it is necessary to prolong a distance between the urea-water added position and the selective reduction catalyst.
  • arrangement of the particulate filter and the selective reduction catalyst in a substantially spaced apart relationship will extremely impair the mountability on a vehicle.
  • an exhaust emission control device compact in size as shown in FIG. 1 has been proposed.
  • a particulate filter 3 housed in a casing 5 to capture particles in the exhaust gas 1 ;
  • a selective reduction catalyst 4 having a property capable of selectively reacting NO x with ammonia even in the presence of oxygen.
  • An exit end of the particulate filter 3 is connected to an entry end of the selective reduction catalyst 4 through an S-shaped communication passage 7 such that the exhaust gas 1 discharged from the exit end of the particulate filter 3 is reversely curved back into the entry end of the adjacent selective reduction catalyst 4 .
  • the communication passage 7 is the S-shaped structure comprising a gas gathering portion 7 A which covers the exit end of the particulate filter 3 to gather the exhaust gas 1 just discharged from the exit end of the particulate filter 3 through substantially perpendicular turnabout of the gas, a mixing pipe 7 B which extracts the gathered exhaust gas 1 from the gathering portion 7 A in a direction reverse to the exhaust flow in the particulate filter 3 and a gas dispersing portion 7 C which covers the entry end of the selective reduction catalyst 4 to disperse the gas 1 guided by the mixing pipe 7 B through substantially perpendicular turnabout of the gas into the entry end of the selective reduction catalyst 4 .
  • the entry end of the mixing pipe 7 B is centrally provided with an injector 8 for addition of the urea water into the mixing pipe 7 B and directed to the exit end of the mixing pipe 7 B.
  • an oxidation catalyst 9 for oxidization treatment of the exhaust gas 1
  • an ammonia lessening catalyst 10 for oxidization treatment of surplus ammonia
  • the particulates in the exhaust gas 1 are captured by the particulate filter 3 .
  • the urea water is added downstream of the filter and intermediately of the mixing pipe 7 B into the exhaust gas 1 by the injector 8 and is pyrolyzed into ammonia and carbon dioxide gas, so that NO x in the exhaust gas 1 is favorably reduced and depurated by the ammonia on the selective reduction catalyst 4 .
  • both the particulates and NO x in the exhaust gas 1 are lessened.
  • the exhaust gas 1 discharged from the exit end of the particulate filter 3 is reversely curved back by the communication passage 7 into the entry end of the adjacent selective reduction catalyst 4 so that a long distance is ensured between the urea-water added position intermediately of the communication passage 9 and the selective reduction catalyst 4 to ensure enough reaction time for production of ammonia from the urea water.
  • the particulate filter 3 is arranged in parallel with the selective reduction catalyst 4 and the communication passage 7 is arranged between and along the particulate filter 3 and selective reduction catalyst 4 so that the whole structure becomes compact in size to substantially enhance its mountability on a vehicle.
  • Patent Literature 1 As a prior art literature pertinent to this kind of exhaust emission control device, there already exists, for example, the following Patent Literature 1.
  • Patent Literature 1 JP 2008-196328A
  • the exhaust gas 1 tends to flow biasedly to outward of the curved direction upon the turnabout of the exhaust gas 1 , which may lead to non-uniform introduction of the exhaust gas 1 into the selective reduction catalyst 4 and resultant insufficient derivation of catalytic performance to be inherently exerted.
  • the gas dispersion portion 7 C has a depression in a position opposite to an introduction side of the exhaust gas 1 and directed toward an entry end face of the selective reduction catalyst 4 to suppress the flow of the exhaust gas 1 .
  • any depression shapes proposed up to the present may correct longitudinal bias in flow along the introduced direction of the exhaust gas 1 into the gas dispersion portion 7 C, but cannot concurrently contribute to improved dispersion in a lateral direction (direction substantially parallel to the entry end face of the selective reduction catalyst 4 and substantially perpendicular to the introduced direction of the exhaust gas 1 ).
  • the invention was made in view of the above. Upon turnabout introduction of exhaust gas into a selective reduction catalyst or other aftertreatment device, the invention has its object to correct more effectively than ever before a tendency of the exhaust gas flowing biasedly and relatively much to outward of a curved direction to thereby attain improvement in catalytic performance.
  • the invention is directed to an exhaust emission control device with an exhaust system including an aftertreatment device for purifying exhaust gas passing therethrough and with an adopted layout for turnabout introduction of the exhaust gas into said aftertreatment device, characterized in that it comprises a gas dispersion portion for covering an entry end face of said aftertreatment device and for introducing the exhaust gas thereinto through an exhaust feed port from a direction substantially perpendicular to an axis of said aftertreatment device and an exhaust conduit curved from the exhaust feed port in said gas dispersion portion toward an exit side of said aftertreatment device to extend axially of said aftertreatment device, said gas dispersion portion being of a crushingly deformed shape to ensure an area from said exhaust feed port in said gas dispersion portion to a vicinity of an extension of the axis of said aftertreatment device as a fan-likely spreading flow guide space, a remaining area being a flat throttling space close to the entry end face of said aftertreatment device, a boundary between said throttling and flow guide spaces in the crushingly deformed shape being formed as an arc-
  • the exhaust gas guided through the exhaust conduit is changed in direction into the direction substantially perpendicular to the axis of the aftertreatment device and is introduced into the exhaust feed port.
  • dispersibility in the lateral direction is enhanced while the flow of the exhaust gas is uniformly suppressed by the arc-shaped taper slope.
  • a step is formed midway on a gradient of the taper slope, said step being arcuate concentrically of an arc shape of said taper slope and projecting toward the entry end face of the aftertreatment device.
  • the exhaust conduit has a flow passage cross section upstream of the exhaust feed port in the form of a rhombus with one of diagonals thereof being aligned with the curved direction of said exhaust conduit. Then, the flow of the exhaust gas upstream of the exhaust feed port can be guided centrally of the exhaust conduit and be persuaded to form a main flow substantially centrally of the exhaust conduit to thereby further suppress generation of lateral bias upon the turnabout of the flow.
  • a guide depression is formed on the gas dispersion portion, said guide depression projecting into the throttling space in position corresponding to a bisectrix of a fan shape of the flow guide space to suppress and direct the main flow of the exhaust gas centrally of the entry end face of the aftertreatment device. Then, when the flow rate of the exhaust gas is lowered, the main flow of the exhaust gas is effectively suppressed and guided centrally of the entry end face of aftertreatment device by said guide depression.
  • a sensor boss is formed on the bisectrix of the fan shape of the flow guide space between the guide depression and the taper slope. Then, the sensor boss can be utilized to position the sensor, which contributes to direct detection of temperature or other various information on the main flow of the exhaust gas.
  • the above-mentioned exhaust emission control device according to the invention can exhibit various excellent effects as mentioned in the below.
  • the step is formed midway on the gradient of the taper slope, is arcuate concentrically of an arc shape of said taper slope and projects toward the entry end face of the aftertreatment device, even if the exhaust gas contains the additive having greater specific gravity than the exhaust gas, the additive flowing along the inner wall surface of the flow passage outward of the curved direction by the centrifugal force can be caused to run onto the step, whereby the additive is broken away from the inner wall surface of the flow passage and is diffused toward the entry end face of the aftertreatment device.
  • the dispersibility of the additive contained in the exhaust gas can be substantially improved to further effectively derive the catalytic performance of the aftertreatment device.
  • the exhaust conduit has the flow passage cross section upstream of the exhaust feed port in the form of the rhombus with one of the diagonals thereof being aligned with the curved direction of said exhaust conduit, the formation of the flow passage cross section upstream of the exhaust feed port in the exhaust conduit in the form of the rhombus guides the flow of the exhaust gas upstream of the exhaust feed port centrally of the exhaust conduit to persuade formation of the main flow thereof substantially centrally of the exhaust conduit, thereby further suppressing generation of lateral bias upon turnabout of the flow, leading to further effective derivation of the catalytic performance of the aftertreatment device.
  • the guide depression is formed on the gas dispersion portion and projects into the throttling space in position corresponding to the bisectrix of the fan-shape of the flow guide space to suppress and direct the main flow of the exhaust gas centrally of the entry end face of the aftertreatment device, even if the flow rate of the exhaust gas is lowered to lower the suppressive effect of the taper slope, the main flow of the exhaust gas can be effectively suppressed by the guide depression to guide the same centrally of the entry end face of the aftertreatment device to thereby compensate lowering of the catalytic performance due to lowering in flow rate of the exhaust gas.
  • the sensor boss When employed is the construction that the sensor boss is formed on the bisectrix of the fan shape of the flow guide space between the guide depression and the taper slope, the sensor boss can be utilized to position the sensor, which contributes to direct detection of temperature or other various information on the main flow of the exhaust gas, leading to substantial enhancement of the detection accuracy and realization of easily arranging the sensor in position.
  • FIG. 1 is a schematic diagram showing an example of a conventional exhaust emission control device
  • FIG. 2 is a perspective view showing an embodiment of the invention
  • FIG. 3 is a front view of a gas dispersion portion shown in FIG. 2 ;
  • FIG. 4 is a view looking in a direction of arrows IV in FIG. 3 ;
  • FIG. 5 is a sectional view looking in a direction of arrows V in FIG. 4 ;
  • FIG. 6 is a sectional view of the gas dispersion portion shown in FIG. 4 .
  • FIGS. 2-6 show the embodiment of the invention.
  • a gas dispersion portion 7 C providing a downstream portion of the communication passage 7 is constructed such that it covers an entry end face of a selective reduction catalyst 4 as aftertreatment device and that the exhaust gas 1 is introduced through an exhaust feed port 11 from a direction substantially perpendicular to an axis of the catalyst 4 (see FIG. 4 ).
  • a mixing pipe 7 B guiding the exhaust gas 1 into the exhaust feed port 11 of the gas dispersion portion 7 C provides an exhaust conduit curved from the exhaust feed port 11 toward an exit side of the selection reduction catalyst 4 to extend axially of the selection reduction catalyst 4 .
  • the gas dispersion portion 7 C is of a crushingly deformed shape to ensure an area extending from the exhaust feed port 11 to a vicinity of an extension of the axis of the selective reduction catalyst 4 in the gas dispersion portion 7 C as a fan-likely spreading flow guide space 12 , a remaining area being a flat throttling space 13 close to the entry end face of the selective reduction catalyst 4 , a boundary between the throttling and flow guide spaces 13 and 12 in the crushingly deformed shape being formed as an arc-like taper slope 14 .
  • a step 15 which is arcuate concentrically of an arc shape of the taper slope 14 and projects or jetties toward the entry end face of the selective reduction catalyst 4 ; and the mixing pipe 7 B has a flow passage cross section upstream of the exhaust feed port 11 in the form of a rhombus with one of diagonals thereof being aligned with the curved direction of the mixing pipe 7 B (see FIG. 5 ).
  • a guide depression 16 which projects into the throttling space 13 in position corresponding to a bisectrix X of the fan shape of the flow guide space 12 (see FIG. 3 ) to suppress and direct a main flow of the exhaust gas 1 centrally of the entry end face of the selective reduction catalyst 4 .
  • a sensor boss 17 Formed on the bisectrix X (see FIG. 3 ) of the fan shape of the flow guide space 12 and between the guide depression 16 and the taper slope 14 is a sensor boss 17 into which a sensor 18 is fitted to detect a temperature of the exhaust gas 1 .
  • the exhaust gas 1 guided through the mixing pipe 7 B is changed in direction into the direction substantially perpendicular to the axis of the selective reduction catalyst 4 and is introduced into the exhaust feed port 11 .
  • the exhaust gas 1 While flowing from the exhaust feed port 11 into the flow guide space 12 widened fan-likely, the exhaust gas 1 is enhanced in dispersibility in the lateral direction (direction substantially parallel to the entry end face of the selective reduction catalyst 4 and substantially perpendicular to the introduction direction of the exhaust gas 1 ) and is evenly suppressed in flow by the arc-shaped taper slope 14 .
  • the tendency of the exhaust gas 1 flowing biasedly and relatively much to outward of the curved direction is corrected effectively without causing any lateral bias.
  • the exhaust gas 1 contains misty urea water (additive) added upstream.
  • the misty urea water which has greater specific gravity than the exhaust gas 1 , tends to be prominently biased to outward of the curved direction.
  • the formation, midway on the gradient of the taper slope 14 , of the step 15 which is arcuate concentrically of the arc shape of the taper slope 14 and projects or jetties toward the entry end face of the selective reduction catalyst 4 causes the misty urea water flowing along an inner wall surface of the flow passage outward of the curved direction by a centrifugal force to run onto the step 15 , whereby the misty urea water is broken away from the inner wall surface of the flow passage and is diffused toward the entry end face of the selective reduction catalyst 4 .
  • the misty urea water whose bias has been difficult to be corrected can be substantially enhanced in dispersibility.
  • the tendency of the exhaust gas 1 flowing relatively much to outward of the curved direction thereof can be effectively corrected to an extent unattainable ever before, so that a full volume of the selective reduction catalyst 4 can be effectively utilized to sufficiently derive the catalytic performance to be inherently exhibited.
  • the misty urea water which has greater specific gravity than the exhaust gas 1 , is contained in the exhaust gas 1 , the misty urea water flowing along the inner wall surface of the flow passage outward of the curved direction by the centrifugal force is caused to run onto the step 15 so that the misty urea water can be broken away from the inner wall surface of the flow passage and be diffused toward the entry end face of the selective reduction catalyst 4 .
  • the dispersibility of the misty urea water contained in the exhaust gas 1 can be also substantially enhanced, leading to further effective derivation of the catalytic performance of the selective reduction catalyst 4 .
  • the mixing pipe 7 B has the flow passage cross section upstream of the exhaust feed port 11 in the form of the rhombus with one of the diagonals thereof being aligned with the curved direction of the mixing pipe 7 B.
  • the flow of the exhaust gas 1 upstream of the exhaust feed port 11 can be guided centrally of the mixing pipe 7 B and persuaded to form a main flow substantially centrally thereof to thereby further suppress generation of lateral bias upon turnabout of the flow, leading to further effective deviation of the catalytic performance of the selective reduction catalyst 4 .
  • the guide depression 16 is formed in the gas dispersion portion 7 C, so that, even if the flow rate of the exhaust gas 1 is lowered to lower the suppressive effect of the taper slope 14 , the main flow of the exhaust gas 1 can be effectively suppressed by the guide depression 16 to guide the same centrally of the entry end face of the selective reduction catalyst 4 to thereby compensate lowering of the catalytic performance due to lowering in flow rate of the exhaust gas 1 .
  • the sensor boss 17 is formed on the bisectrix of the fan shape of the flow guide space 12 between the guide depression 16 and the taper slope 14 so that the sensor boss 17 can be utilized to position the sensor 18 , which contributes to direct detection of the temperature of the main flow of the exhaust gas 1 , leading to substantial enhancement of the detection accuracy and realization of easily arranging the sensor 18 in position.
  • an exhaust emission control device is not limited to the above embodiment and that various changes and modifications may be made without departing from the scope of the invention.
  • the embodiment illustrated is application to an entry side of a selective reduction catalyst in an arrangement thereof in parallel with a particulate filter
  • the invention may be similarly applied to any aftertreatment device other than the selective reduction catalyst; alternatively, the invention may be applied to a variety of types of exhaust emission control devices with adopted layout of turnabout introduction of exhaust gas into an aftertreatment device.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
US16/483,254 2017-02-03 2018-02-01 Exhaust purification device Abandoned US20190376430A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2017018119A JP6752733B2 (ja) 2017-02-03 2017-02-03 排気浄化装置
JP2017-018119 2017-02-03
PCT/JP2018/003487 WO2018143372A1 (ja) 2017-02-03 2018-02-01 排気浄化装置

Publications (1)

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US20190376430A1 true US20190376430A1 (en) 2019-12-12

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Application Number Title Priority Date Filing Date
US16/483,254 Abandoned US20190376430A1 (en) 2017-02-03 2018-02-01 Exhaust purification device

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US (1) US20190376430A1 (ja)
EP (1) EP3578772A1 (ja)
JP (1) JP6752733B2 (ja)
CN (1) CN110226024A (ja)
WO (1) WO2018143372A1 (ja)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093422A (en) * 1976-06-01 1978-06-06 Champion International Corporation Automotive exhaust system using filter containing calcium carbonate coating
US20100257850A1 (en) * 2007-11-21 2010-10-14 Hino Motors Ltd. Exhaust emission control device
US20110214416A1 (en) * 2007-09-13 2011-09-08 Hino Motors ,Ltd. Exhaust emission control device
US9441513B2 (en) * 2010-03-23 2016-09-13 Yanmar Co., Ltd. Exhaust gas purification device
US20180149070A1 (en) * 2016-11-25 2018-05-31 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Connection member of exhaust pipe
US20180149065A1 (en) * 2016-11-25 2018-05-31 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Exhaust system structure of internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2877041B1 (fr) * 2004-10-25 2007-03-02 Faurecia Sys Echappement Dispositif de traitement des gaz d'echappement pour vehicule automobile et vehicule correspondant
JP4785766B2 (ja) 2007-02-09 2011-10-05 日野自動車株式会社 排気浄化装置
JP5124030B2 (ja) * 2011-03-18 2013-01-23 株式会社小松製作所 排気ガス浄化装置
JP5791331B2 (ja) * 2011-03-31 2015-10-07 ダイハツ工業株式会社 触媒コンバータの排気導入管の構造

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093422A (en) * 1976-06-01 1978-06-06 Champion International Corporation Automotive exhaust system using filter containing calcium carbonate coating
US20110214416A1 (en) * 2007-09-13 2011-09-08 Hino Motors ,Ltd. Exhaust emission control device
US20100257850A1 (en) * 2007-11-21 2010-10-14 Hino Motors Ltd. Exhaust emission control device
US9441513B2 (en) * 2010-03-23 2016-09-13 Yanmar Co., Ltd. Exhaust gas purification device
US20180149070A1 (en) * 2016-11-25 2018-05-31 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Connection member of exhaust pipe
US20180149065A1 (en) * 2016-11-25 2018-05-31 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Exhaust system structure of internal combustion engine

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WO2018143372A1 (ja) 2018-08-09
JP2018123801A (ja) 2018-08-09
JP6752733B2 (ja) 2020-09-09
EP3578772A1 (en) 2019-12-11
CN110226024A (zh) 2019-09-10

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