FR3102800B1 - Internal combustion engine exhaust line equipped with a catalyst for the selective reduction of nitrogen oxides and urea evaporator elements - Google Patents

Internal combustion engine exhaust line equipped with a catalyst for the selective reduction of nitrogen oxides and urea evaporator elements Download PDF

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Publication number
FR3102800B1
FR3102800B1 FR1912166A FR1912166A FR3102800B1 FR 3102800 B1 FR3102800 B1 FR 3102800B1 FR 1912166 A FR1912166 A FR 1912166A FR 1912166 A FR1912166 A FR 1912166A FR 3102800 B1 FR3102800 B1 FR 3102800B1
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FR
France
Prior art keywords
catalyst
combustion engine
internal combustion
nitrogen oxides
selective reduction
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.)
Active
Application number
FR1912166A
Other languages
French (fr)
Other versions
FR3102800A1 (en
Inventor
Romain Boubennec
Stanislas Pruski
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Priority to FR1912166A priority Critical patent/FR3102800B1/en
Publication of FR3102800A1 publication Critical patent/FR3102800A1/en
Application granted granted Critical
Publication of FR3102800B1 publication Critical patent/FR3102800B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
    • B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
    • B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/70—Pre-treatment of the materials to be mixed
    • B01F23/706—Evaporating solvents or dispersion liquids, e.g. water, at least partially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43161—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod composed of consecutive sections of flat pieces of material
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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

Abstract

L’invention concerne un conduit d’échappement (1) de moteur à combustion interne, présentant un axe principal I. Ce conduit (1) est délimité radialement par une paroi latérale (10) et comprend : - une ouverture axiale (2) située face à une entrée de fluide (31) d’un catalyseur (3) de réduction sélective des oxydes d’azote, - un orifice d’injection d’urée (4) situé en amont de l’ouverture axiale (2) et réalisé sur une première partie (11) de la paroi latérale (10), et - au moins deux éléments évaporateurs (5, 51, 52, 53) disposés entre l’orifice d’injection (4) et l’ouverture axiale (2), Selon l’invention, les éléments évaporateurs (5, 51, 52, 53) sont espacés l’un de l’autre, inclinés par rapport à l’axe principal I vers la première partie (11) de la paroi latérale, et décalés à la fois axialement et radialement l’un par rapport à l’autre. (Figure de l’abrégé : Fig.4)The invention relates to an exhaust duct (1) for an internal combustion engine, having a main axis I. This duct (1) is delimited radially by a side wall (10) and comprises: - an axial opening (2) located facing a fluid inlet (31) of a catalyst (3) for the selective reduction of nitrogen oxides, - a urea injection orifice (4) located upstream of the axial opening (2) and made on a first part (11) of the side wall (10), and - at least two evaporator elements (5, 51, 52, 53) arranged between the injection orifice (4) and the axial opening (2) , According to the invention, the evaporator elements (5, 51, 52, 53) are spaced from each other, inclined with respect to the main axis I towards the first part (11) of the side wall, and offset both axially and radially relative to each other. (Abstract Figure: Fig.4)

FR1912166A 2019-10-30 2019-10-30 Internal combustion engine exhaust line equipped with a catalyst for the selective reduction of nitrogen oxides and urea evaporator elements Active FR3102800B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1912166A FR3102800B1 (en) 2019-10-30 2019-10-30 Internal combustion engine exhaust line equipped with a catalyst for the selective reduction of nitrogen oxides and urea evaporator elements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1912166 2019-10-30
FR1912166A FR3102800B1 (en) 2019-10-30 2019-10-30 Internal combustion engine exhaust line equipped with a catalyst for the selective reduction of nitrogen oxides and urea evaporator elements

Publications (2)

Publication Number Publication Date
FR3102800A1 FR3102800A1 (en) 2021-05-07
FR3102800B1 true FR3102800B1 (en) 2023-04-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR1912166A Active FR3102800B1 (en) 2019-10-30 2019-10-30 Internal combustion engine exhaust line equipped with a catalyst for the selective reduction of nitrogen oxides and urea evaporator elements

Country Status (1)

Country Link
FR (1) FR3102800B1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2906838B1 (en) * 2006-10-09 2013-03-29 Renault Sas EXHAUST LINE HAVING A FUEL INJECTOR AND MEANS FOR HOMOGENIZING BURNED GASES.
DE102006058402A1 (en) * 2006-12-12 2008-06-19 Bayerische Motoren Werke Ag Device for admixing a reducing agent in an exhaust gas stream of an internal combustion engine
JP4375465B2 (en) * 2007-09-14 2009-12-02 トヨタ自動車株式会社 Additive dispersion plate structure in exhaust passage

Also Published As

Publication number Publication date
FR3102800A1 (en) 2021-05-07

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