WO2013039741A1 - Système de post-traitement des gaz d'échappement destiné à des moteurs et comportant une recirculation des gaz d'échappement - Google Patents

Système de post-traitement des gaz d'échappement destiné à des moteurs et comportant une recirculation des gaz d'échappement Download PDF

Info

Publication number
WO2013039741A1
WO2013039741A1 PCT/US2012/053633 US2012053633W WO2013039741A1 WO 2013039741 A1 WO2013039741 A1 WO 2013039741A1 US 2012053633 W US2012053633 W US 2012053633W WO 2013039741 A1 WO2013039741 A1 WO 2013039741A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust
regeneration unit
heat exchanger
heated
fuel
Prior art date
Application number
PCT/US2012/053633
Other languages
English (en)
Inventor
Adam J. Kotrba
Argun Yetkin
Timothy Jackson
Gabriel Salanta
Original Assignee
Tenneco Automotive Operating Company Inc.
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 Tenneco Automotive Operating Company Inc. filed Critical Tenneco Automotive Operating Company Inc.
Priority to DE112012003821.5T priority Critical patent/DE112012003821T5/de
Publication of WO2013039741A1 publication Critical patent/WO2013039741A1/fr

Links

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
    • F01N3/02—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
    • F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F01N3/0256—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases the fuel being ignited by electrical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics

Definitions

  • the present disclosure generally relates to a system for treating exhaust gas emitted from an internal combustion engine. More particularly, a regeneration unit for increasing an exhaust gas temperature is combined with an exhaust gas recirculation system to efficiently transfer heat energy within one portion of the exhaust system to an exhaust treatment device.
  • Typical aftertreatment systems for diesel engine exhaust may include one or more of a diesel particulate filter (DPF), a selective catalytic reduction (SCR) system, a hydrocarbon (HC) injector and a diesel oxidation catalyst (DOC).
  • DPF diesel particulate filter
  • SCR selective catalytic reduction
  • HC hydrocarbon
  • DOC diesel oxidation catalyst
  • Other emissions control systems include exhaust gas recirculation arrangements operable to reduce combustion temperatures within the engine and reduce NO x emissions.
  • Many exhaust gas recirculation systems are operable to vary the rate of exhaust gas supplied to the intake of the internal combustion engine. As the rate of recirculation increases, combustion temperatures are reduced to decrease the energy content due to the reduced quantity of oxygen, thereby reducing the NO x emissions.
  • lower exhaust temperatures tend to include an increased quantity of particulate matter, as well as the reduced oxygen content.
  • Typical DPFs are integrated in most, if not all, on-road diesel engine vehicles. As the rate of exhaust gas recirculation increases, difficulty arises in managing the soot load on the DPFs. As the exhaust gas recirculation rate increases, the percentage of time at which passive regeneration of the DPF occurs is reduced due to the reduced exhaust temperature and increased particulate matter. Similarly, many active regeneration devices include catalysts which require minimum temperatures to reduce the NO x content of the exhaust. Accordingly, it may be beneficial to provide an exhaust aftertreatment system including an exhaust gas recirculation with a regeneration unit in a diesel particulate filter to maximize the use of energy in the exhaust while reducing the cost and complexity to remove NO x and particulate matter.
  • a system for treating the exhaust of an internal combustion engine having an exhaust recirculation system and a turbocharger includes an exhaust passageway adapted to receive exhaust from the engine.
  • a heat exchanger is adapted to be positioned within the exhaust gas recirculation system.
  • a pressurized air supply system includes a conduit containing pressurized air and extending within the heat exchanger.
  • a regeneration unit for combusting a fuel and heating the exhaust flowing through the exhaust passageway is supplied air from the air supply system that has been heated by the heat exchanger.
  • An exhaust treatment device is positioned downstream from the regeneration unit in receipt of the heated exhaust.
  • a system for treating the exhaust of an internal combustion engine includes an exhaust passageway adapted to receive the exhaust from the engine.
  • a heat exchanger is adapted to be positioned within the exhaust passageway.
  • a regeneration unit is positioned within a side branch in communication with the exhaust passageway. The regeneration unit combusts a fuel and heats the exhaust flowing through the exhaust passageway. The regeneration unit is supplied a source of oxygen that has been heated by the heat exchanger.
  • An exhaust treatment device is positioned downstream from the regeneration unit in receipt of the heated exhaust.
  • Figure 1 is a schematic depicting an exhaust treatment system equipped with an exhaust gas recirculation system, a heat exchanger and a regeneration unit positioned upstream of an exhaust treatment device;
  • Figure 2 is a schematic depicting an exhaust treatment system including a regeneration unit, a diesel particulate filter and a heat exchanger positioned downstream from the diesel particulate filter;
  • Figure 3 is schematic depicting another exhaust treatment system including a regeneration unit positioned within a side branch of an exhaust passageway and a heat exchanger positioned downstream from an exhaust treatment device; and
  • Figure 4 depicts another alternate exhaust treatment system.
  • FIG. 1 is a schematic depicting an exhaust gas treatment system 10 for use with an exemplary internal combustion engine 12 having an exhaust manifold 13 and an exhaust gas recirculation system 14.
  • An intake passage 16 is coupled to provide combustion air thereto.
  • An air intake filter 18 is positioned upstream from intake passage 16.
  • a turbocharger 20 includes a driven member 22 positioned within an exhaust passage 24.
  • Turbocharger 20 also includes a compressor member 26 positioned within intake passage 16 to provide pressurized air to an intake manifold 28 coupled to engine 12.
  • a charge air cooler 30 reduces the temperature of compressed air downstream from compressor member 26.
  • Exhaust gas recirculation system 14 includes a high pressure branch 34 in receipt of exhaust from engine 12 having an upstream end 36 positioned upstream from driven member 22 of turbocharger 20.
  • An exhaust gas cooler 38 receives exhaust passing through high pressure branch 34.
  • a valve 40 may be controlled to vary the rate of exhaust gas supplied to intake manifold 28. More particularly, charged air provided downstream from charge air cooler 30 is mixed with recirculated exhaust gas in a mixing tube portion 42 for supply to intake manifold 28.
  • Exhaust gas treatment system 10 also includes a regeneration unit 50 positioned downstream from driven member 22 and upstream from a number of exhaust aftertreatment devices.
  • the aftertreatment devices include a hydrocarbon injector 52 and a diesel particulate filter 54. It should be appreciated that the aftertreatment device may alternatively include a diesel oxidation catalyst, a lean ⁇ catalyst or many other types of catalytic converters.
  • Injector 52 includes a fuel inlet 60 and an air inlet 62.
  • Fuel inlet 60 is in communication with a fuel delivery system 66 including a fuel tank 68, a fuel filter 70, a fuel pump 72 and a fuel block 74 interconnected by a fuel line 76.
  • Fuel delivery system 66 is operable to provide pressurized hydrocarbon to injector 52.
  • a secondary air supply system 90 includes an air filter 92 and a mass air flow (MAF) sensor 94.
  • a compressor 96 may be formed as a portion of a supercharger, a turbocharger or a stand-alone electric compressor. Output from compressor 96 is provided to air inlet 62 after passing through a heat exchanger 98 positioned in high pressure branch 34.
  • Heat exchanger 98 includes a housing 100 in receipt of exhaust passing through high pressure branch 34 as well as an internal conduit 102 containing pressurized air supplied from compressor 96. As the air passes through conduit 102 it is heated by the energy from the engine exhaust passing through housing 100.
  • a controller 1 12 is in communication with compressor 96, an igniter 106, and fuel block 74 to actively control regeneration of DPF 54.
  • controller 1 12 When regeneration of DPF 54 is desired, controller 1 12 causes fuel to be injected via fuel inlet 60 and heated air to be injected via air inlet 62 to supply atomized fuel within regeneration unit 50.
  • Igniter 106 is mounted to regeneration unit 50 at a position to combust the fuel provided by injector 52 within a primary combustion chamber 108.
  • FIG. 2 depicts an alternate exhaust gas treatment system identified at reference numeral 200.
  • Exhaust system 200 is substantially similar to exhaust system 10 with the exception that the heat source for the secondary air supply provided to the regeneration unit is downstream of the exhaust treatment device instead of being located within an exhaust gas recirculation system. Accordingly, like elements will retain their previously introduced reference numerals including an "a" suffix. More particularly, exhaust passage 24a is in receipt of exhaust provided from internal combustion engine 12a and flowing through exhaust manifold 13a. The exhaust is routed into regeneration unit 50a upstream of diesel particulate filter 54a.
  • a heat exchanger 202 is positioned downstream from DPF 54a.
  • Heat exchanger 202 includes a housing 204.
  • a portion of a secondary air conduit 206 is positioned within housing 204 in a heat transfer relationship with the exhaust flowing through heat exchanger 202.
  • the secondary source of air is provided and pressurized by air supply system 90a.
  • the air provided by system 90a is heated within heat exchanger 202 and supplied to air inlet 62a.
  • the heated and compressed air is mixed with fuel entering fuel inlet 60a such that atomized, heated fuel is injected within regeneration unit 50a.
  • An igniter 106a is energized to combust fuel and air within regeneration unit 50a.
  • the heat generated during the combustion process within regeneration unit 50a is efficiently utilized by positioning heat exchanger 202 downstream from, and in relative close proximity to, regeneration unit 50a.
  • FIG. 3 relates to another alternate exhaust treatment system identified at reference numeral 300.
  • Exhaust treatment system 300 includes a regeneration unit 302 positioned within a side branch portion 304 of system 300. Certain elements from exhaust treatment system 10 and exhaust treatment system 200 are also included within exhaust treatment system 300. As such, similar elements will be identified with like reference numerals including a "b" suffix.
  • Side branch portion 304 is in fluid communication with exhaust passage 24.
  • Regeneration unit 302 may be used to heat the exhaust passing through exhaust passage 24 to an elevated temperature that will enhance the efficiency of a diesel oxidation catalyst (DOC) 306 and facilitate regeneration of DPF 54b.
  • Exhaust treatment system 300 includes a heat exchanger 202b positioned downstream from DOC 306 and DPF 54b. Exhaust flows through housing 204b and across secondary air conduit 206b to heat secondary air provided by heated air supply system 90b.
  • DOC diesel oxidation catalyst
  • FIG. 4 depicts another alternate exhaust treatment system identified at reference numeral 400.
  • System 400 combines a side branch mounted regeneration unit positioned upstream of a diesel oxidation catalyst and diesel particulate filter with a heat exchanger positioned within an EGR system.
  • Secondary air provided by air supply system 90c travels through heat exchanger 98c that is positioned within the high pressure loop of EGR system 14c. Heated and pressurized secondary air is provided to air inlet 62c of regeneration unit 50c.
  • Fuel is provided to injector 52c via fuel delivery system 66c.
  • Combustion occurs partially within regeneration unit 50c and within the portion of exhaust passage 24c immediately upstream of DOC 306c to increase the temperature of the exhaust as it enters DOC 306c.
  • the temperature of the exhaust is further increased within DOC 306c to regenerate DPF 54c.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Un système qui permet de traiter les gaz d'échappement d'un moteur à combustion interne et qui comporte un système de recirculation des gaz d'échappement ainsi qu'un turbocompresseur comprend un passage d'échappement servant à recevoir les gaz d'échappement en provenance du moteur. Un échangeur thermique est conçu pour être disposé dans le système de recirculation des gaz d'échappement. Un système d'alimentation en air comprimé présente un conduit qui contient de l'air comprimé et qui s'étend dans l'échangeur thermique. Le système d'alimentation en air alimente en air une unité de régénération qui permet la combustion d'un carburant et le chauffage des gaz d'échappement circulant dans le passage d'échappement, cet air ayant été chauffé par l'échangeur thermique. Un dispositif de traitement des gaz d'échappement se situe en aval de l'unité de régénération et reçoit les gaz d'échappement chauffés.
PCT/US2012/053633 2011-09-14 2012-09-04 Système de post-traitement des gaz d'échappement destiné à des moteurs et comportant une recirculation des gaz d'échappement WO2013039741A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112012003821.5T DE112012003821T5 (de) 2011-09-14 2012-09-04 Abgasnachbehandlungssytem für mit einer Abgasrückführung ausgestattete Motoren

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/232,195 US20130061579A1 (en) 2011-09-14 2011-09-14 Exhaust Gas Aftertreatment System For Engines Equipped With Exhaust Gas Recirculation
US13/232,195 2011-09-14

Publications (1)

Publication Number Publication Date
WO2013039741A1 true WO2013039741A1 (fr) 2013-03-21

Family

ID=47828599

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/053633 WO2013039741A1 (fr) 2011-09-14 2012-09-04 Système de post-traitement des gaz d'échappement destiné à des moteurs et comportant une recirculation des gaz d'échappement

Country Status (3)

Country Link
US (1) US20130061579A1 (fr)
DE (1) DE112012003821T5 (fr)
WO (1) WO2013039741A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013201196B4 (de) * 2012-03-15 2019-03-21 Ford Global Technologies, Llc Sicheres Betreiben eines Partikelfilters
US9003792B2 (en) * 2012-04-05 2015-04-14 GM Global Technology Operations LLC Exhaust aftertreatment and exhaust gas recirculation systems
JP6205153B2 (ja) * 2013-03-29 2017-09-27 日立造船株式会社 排ガス浄化システムにおける脱硝触媒のオンサイト再生方法
US9470183B2 (en) 2014-08-12 2016-10-18 Ford Global Technologies, Llc Coordination of secondary air and blow-through air delivery
US9890674B2 (en) * 2015-12-11 2018-02-13 Granitefuel Engineering Inc. Siloxane removal system and media regeneration methods
US10018097B2 (en) * 2016-02-25 2018-07-10 Ford Global Technologies, Llc Methods and systems for exhaust gas heat recovery
US10843118B2 (en) 2018-10-30 2020-11-24 Granitefuel Engineering Inc. Filtration apparatus with cartridge assembly
CN114856782B (zh) * 2022-04-01 2023-08-08 三河市科达科技有限公司 一种基于废气涡流加热与电加热相结合的dpf再生装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802846A (en) * 1997-03-31 1998-09-08 Caterpillar Inc. Exhaust gas recirculation system for an internal combustion engine
WO2007081342A1 (fr) * 2006-01-13 2007-07-19 Mack Trucks, Inc. Méthode de commande de température d'un gaz d'échappement et d'un gaz d'admission
US7752840B2 (en) * 2005-03-24 2010-07-13 Honeywell International Inc. Engine exhaust heat exchanger
US20100269492A1 (en) * 2009-04-27 2010-10-28 Tenneco Automotive Operating Company Inc. Diesel aftertreatment system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306035A (en) * 1966-02-11 1967-02-28 Jacque C Morrell Apparatus for treatment of exhaust gases from internal combustion engines
JP4045935B2 (ja) * 2002-11-25 2008-02-13 三菱ふそうトラック・バス株式会社 内燃機関の排気浄化装置
US20050274107A1 (en) * 2004-06-14 2005-12-15 Ke Liu Reforming unvaporized, atomized hydrocarbon fuel
EP1643094B1 (fr) * 2004-10-01 2009-06-17 J. Eberspächer GmbH & Co. KG Système d'échappement d'un moteur à combustion interne et procédé correspondent pour le faire fonctionner
US7322193B2 (en) * 2005-08-19 2008-01-29 Deere & Company Exhaust gas recirculation system
JP4586911B2 (ja) * 2008-08-25 2010-11-24 トヨタ自動車株式会社 内燃機関の排気浄化装置
US8726656B2 (en) * 2008-09-26 2014-05-20 Renault Trucks Power assembly, especially for an automotive vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802846A (en) * 1997-03-31 1998-09-08 Caterpillar Inc. Exhaust gas recirculation system for an internal combustion engine
US7752840B2 (en) * 2005-03-24 2010-07-13 Honeywell International Inc. Engine exhaust heat exchanger
WO2007081342A1 (fr) * 2006-01-13 2007-07-19 Mack Trucks, Inc. Méthode de commande de température d'un gaz d'échappement et d'un gaz d'admission
US20100269492A1 (en) * 2009-04-27 2010-10-28 Tenneco Automotive Operating Company Inc. Diesel aftertreatment system

Also Published As

Publication number Publication date
DE112012003821T5 (de) 2014-08-07
US20130061579A1 (en) 2013-03-14

Similar Documents

Publication Publication Date Title
WO2013039741A1 (fr) Système de post-traitement des gaz d'échappement destiné à des moteurs et comportant une recirculation des gaz d'échappement
US8776504B2 (en) Bypass fluid system for exhaust aftertreatment
US8250857B2 (en) Exhaust aftertreatment system
US8828342B1 (en) DPF energy conservation
CN111255547B (zh) 废气后处理系统和对内燃机进行废气后处理的方法
US20110197569A1 (en) On-vehicle nitrogen oxide aftertreatment system
JP2015507118A (ja) 排気後処理システム及びそのシステムを操作する方法
US20110225969A1 (en) Compressor bypass to exhaust for particulate trap regeneration
KR20150086369A (ko) 환원제 주입 제어 시스템
EP2460986B1 (fr) Réduction de particules dans un système d'échappement d'un moteur à essence
WO2008066482A1 (fr) Agencement et procédé destinés à un moteur à combustion à suralimentation
CN103097683A (zh) 后处理燃烧器系统的预热方法
GB2558562A (en) Aftertreatment temperature control apparatus and method
CN115929443A (zh) 用于转化来自发动机的排气中的NOx排放物的EATS
US20130227934A1 (en) Aftertreatment burner air supply system
EP2344748B1 (fr) Système de moteur à combustion interne et ensemble filtre à particules pour un tel système de moteur à combustion interne
WO2010126521A1 (fr) Dispositif de commande de propriétés de système à moteur
WO2011133155A1 (fr) Réduction du colmatage dans des composants de post-traitement
US20140311127A1 (en) Exhaust gas after treatment system with temperature control
US20180142595A1 (en) Internal Combustion Engine Aftertreatment Heating Loop
JPWO2011101898A1 (ja) 内燃機関の排気浄化装置
CN104047681A (zh) 用于混合柴油机排气流体的后处理系统
CN111456859A (zh) 用于选择性原位和非原位限制NOx产生的发动机系统和操作策略
WO2016082850A1 (fr) Système de purification de gaz d'échappement de moteurs à combustion interne à recirculation de gaz d'échappement
WO2020001755A1 (fr) Procédé amélioré de commande d'un moteur à combustion interne

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12831463

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2014530697

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1120120038215

Country of ref document: DE

Ref document number: 112012003821

Country of ref document: DE

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 12831463

Country of ref document: EP

Kind code of ref document: A1