EP2050936A2 - Dispositif de post-traitement - Google Patents

Dispositif de post-traitement Download PDF

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Publication number
EP2050936A2
EP2050936A2 EP08016719A EP08016719A EP2050936A2 EP 2050936 A2 EP2050936 A2 EP 2050936A2 EP 08016719 A EP08016719 A EP 08016719A EP 08016719 A EP08016719 A EP 08016719A EP 2050936 A2 EP2050936 A2 EP 2050936A2
Authority
EP
European Patent Office
Prior art keywords
catalyst
aftertreatment device
engine
cylinder head
assemblies
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.)
Withdrawn
Application number
EP08016719A
Other languages
German (de)
English (en)
Other versions
EP2050936A3 (fr
Inventor
Yolanda L. Huslig
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.)
International Engine Intellectual Property Co LLC
Original Assignee
International Engine Intellectual Property Co LLC
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 International Engine Intellectual Property Co LLC filed Critical International Engine Intellectual Property Co LLC
Publication of EP2050936A2 publication Critical patent/EP2050936A2/fr
Publication of EP2050936A3 publication Critical patent/EP2050936A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • 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
    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing

Definitions

  • the present invention relates generally to aftertreatment systems in vehicles. More specifically, the present invention relates to an aftertreatment system having improved efficiency.
  • the aftertreatment system of a vehicle includes large catalyst assemblies mounted on the downstream side of the engine in the chassis of the vehicle.
  • the catalyst assemblies contain catalyst substrates to chemically react with the undesirable emissions components in the exhaust gas.
  • This configuration of aftertreatment device creates several problems.
  • One problem is that the catalyst assemblies are large, making them difficult to package in the chassis of the vehicle downstream of the engine. Additionally, by the time the exhaust gases reach the catalyst assemblies, the gases have cooled. This is problematic because the catalysts function more efficiently at higher temperatures. Further, the catalyst substrates located inside the catalyst assemblies create a back-pressure and a restriction in the engine's exhaust system that can cause the engine performance to degrade.
  • An aftertreatment device for use on an engine having a cylinder head includes an exhaust manifold having an outlet, and at least one catalyst assembly located upstream of the outlet.
  • the at least one catalyst assembly defines an exhaust gas passageway that is in fluid communication with the engine and in fluid communication with the outlet.
  • a catalyst substrate is disposed in the catalyst assembly.
  • FIG. 1 is a schematic front view of an aftertreatment device mounted in an exhaust manifold in accordance with the invention.
  • FIG. 2 is a section view of the aftertreatment device taken along line A-A of FIG. 1 in accordance with the invention.
  • FIG. 3 is a schematic front view of an alternate aftertreatment device mounted between the exhaust manifold and a cylinder head in accordance with the invention.
  • FIG. 4 is a section view of the aftertreatment device taken along line B-B of FIG. 3 in accordance with the invention.
  • FIG. 5 is a schematic front view of a second alternate aftertreatment device mounted in the cylinder head in accordance with the invention.
  • FIG. 6 is a section view of the aftertreatment device taken along line C-C of FIG. 5 in accordance with the invention.
  • an aftertreatment device is indicated generally at 10, and includes an exhaust manifold 12.
  • the exhaust manifold 12 is attached to and extends from a cylinder head 14 of an engine 16, and is designed to collect the exhaust gas from the cylinder head and funnel it into an exhaust pipe (not shown).
  • the cylinder head 14 includes a plurality of exhaust channels 18 for discharging exhaust from the engine 16 in the direction of flow "F".
  • the exhaust manifold 12 includes a neck 20 extending from each exhaust channel 18 on the cylinder head 14, and a body 22 in fluid communication with each neck.
  • the neck 20 is attached to the cylinder head 14, and has a generally increasing width in the direction of flow "F". Downstream of the neck 20 (in the direction of flow "F"), a cylindrical portion 24 is attached to each wide-end of the neck.
  • the body 22 is attached to or integrally formed with each cylindrical portion 24 downstream of the cylindrical portion. In the exhaust manifold 12, the four cylindrical portions 24 are integrally formed with the body 22.
  • an exhaust manifold outlet 26 At the downstream end of the body 22 is an exhaust manifold outlet 26.
  • the exhaust gas flows from the exhaust channel 18 in the cylinder head 14, into the neck 20, through the cylindrical portion 24, through the body 22, and out the outlet 26 of the exhaust manifold 12.
  • a generally cylindrical catalyst assembly 28 is mounted inside each cylindrical portion 24 of the exhaust manifold 12 such that the catalyst substrate 30 is generally centered in the cylindrical portion.
  • the catalyst assembly 28 includes a honeycomb catalyst substrate 30 having an intumescent or a non-intumescent mat 32 disposed around the generally circular, peripheral surface of the catalyst substrate, however other configurations are contemplated.
  • the catalyst assembly 28 may include other layers, such as insulation or a housing, as is known in the art.
  • the honeycomb catalyst can be ceramic, metal, or made of any other material.
  • the cylindrical portion 24 of the exhaust manifold 12 circumscribes the catalyst assembly 28, and the mat 32 engages an inner surface of the cylindrical portion along the length of the catalyst substrate.
  • An inlet surface 34 and an outlet surface 36 of the catalyst assembly 28 advantageously are not engaged by the mat 32, but instead are exposed to the exhaust flow "F" from the exhaust channel 18.
  • the longitudinal axis defined by the cylindrical portion 24 is angled approximately 30-degrees with respect to the exhaust channel 18, however angles from 0 to 360-degrees are contemplated.
  • the catalyst assemblies 28 are disposed in parallel with respect to each other, and the body 22 is disposed in fluid communication with each catalyst assembly 28 to form an exhaust passageway 38.
  • the exhaust gas flow path "F" goes through the catalyst assemblies 28 in the exhaust passageway 38.
  • At least one catalyst assembly 28 can be on the exhaust passageway 38, located upstream of the outlet 26.
  • the body 22 extends generally transverse to the direction of the flow "F” through each of the cylindrical portions 24. Downstream, the flow “F” in the body 22 is generally parallel with an opposing surface 40 of the body. Adjacent the outlet 26 of the exhaust manifold 12, the opposing surface 40 is contoured to direct the exhaust gases "F" out of the manifold through the outlet, which is generally angled 90-degrees with respect to the opposing surface 40.
  • the aftertreatment device 10 requires a minimum internal volume to accommodate the catalyst substrate and the exhaust gas.
  • An exemplary aftertreatment device for a V8 engine could have the following specifications: Diameter of Can (inches) Length of Can (inches) Quantity of Catalyst assemblies Total Volume (square inches) 3 3 8 170 3 3.7 8 209 4 4.3 8 432
  • the temperature of the exhaust gases reaching the catalysts is increased, improving their efficiency. Further, the increased efficiency of the catalysts could lead to the use of substrates having a lower cell density, which would result in less restriction on the engine.
  • an alternate aftertreatment device is indicated generally at 110, and includes a catalyst manifold 100 located upstream of an exhaust manifold 112 and downstream of a cylinder head 14.
  • the cylinder head 14 includes a plurality of exhaust channels 18 for discharging exhaust from the engine 16 in the direction of flow "F".
  • the catalyst manifold 100 includes a first neck 120 extending from each exhaust channel 18 on the cylinder head 14, a cylindrical portion 124 attached to each wide-end of the neck, and a second neck 102 extending from the downstream end of the cylindrical portion.
  • Each first neck 120 is attached to or integrally formed with each cylindrical portion 124.
  • the four cylindrical portions 124 are attached to or integrally formed with each other.
  • an exhaust manifold 112 having a body 122 and an outlet 26.
  • the exhaust gas flows from the exhaust channel 18 in the cylinder head 14, into the first neck 120, through the cylindrical portion 124, through the second neck 102, through the body 122, and out the outlet 26 of the exhaust manifold 112.
  • a generally cylindrical catalyst assembly 28 is mounted inside each cylindrical portion 124 of the catalyst manifold 100 such that the catalyst substrate 30 is generally centered in the cylindrical portion 124.
  • a mat 32 is disposed around the peripheral surface of the catalyst substrate 30, however other configurations are contemplated.
  • the catalyst assemblies 28 are disposed in parallel with respect to each other, and the body 122 is disposed in fluid communication with each catalyst assembly 28 to form an exhaust passageway 138. It is contemplated that one catalyst assembly 28 can form the exhaust passageway 138.
  • the cylindrical portion 124 of the catalyst manifold 100 circumscribes the catalyst assembly 28, and the mat 32 engages an inner surface of the cylindrical portion along the length of the catalyst substrate 30.
  • the longitudinal axis defined by the cylindrical portion 124 is generally aligned with the exhaust channel 18, however angled orientations are contemplated.
  • the temperature of the exhaust gases reaching the catalysts is increased.
  • the increased temperature improves the efficiency of the catalyst assemblies 28.
  • a second alternate aftertreatment device is indicated generally at 210, and is located in the cylinder head 214.
  • the cylinder head 214 includes a plurality of exhaust channels 18 for discharging exhaust from the engine 16 in the direction of flow "F".
  • the cylinder head 214 includes a neck 220 in fluid communication with the exhaust channel 18, and a cylindrical portion 224 downstream of the wide-end of the neck. At the downstream end of the cylindrical portion 224 is an exhaust manifold 212 having a body 222 and an outlet 26. In this configuration, the exhaust gas flows from the exhaust channel 18, through the neck 220, through the cylindrical portion 224, through the body 222, and out the outlet 26 of the exhaust manifold 212.
  • a generally cylindrical catalyst assembly 28 is mounted inside each cylindrical portion 224.
  • a mat 32 is disposed around the peripheral surface of the catalyst substrate 30.
  • the catalyst assemblies 28 are disposed in parallel with respect to each other, and the body 222 is disposed in fluid communication with each catalyst assembly to form an exhaust passageway 238. It is contemplated that the catalyst assembly 28 can be inserted in a recess in the cylinder head 214, or integrally formed with the cylinder head.
  • the temperature of the exhaust gases reaching the catalysts is increased.
  • the increased temperature improves the efficiency of the catalyst assemblies 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)
EP08016719A 2007-10-15 2008-09-23 Dispositif de post-traitement Withdrawn EP2050936A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/872,268 US20090094966A1 (en) 2007-10-15 2007-10-15 Aftertreatment device

Publications (2)

Publication Number Publication Date
EP2050936A2 true EP2050936A2 (fr) 2009-04-22
EP2050936A3 EP2050936A3 (fr) 2010-01-20

Family

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Family Applications (1)

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EP08016719A Withdrawn EP2050936A3 (fr) 2007-10-15 2008-09-23 Dispositif de post-traitement

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US (1) US20090094966A1 (fr)
EP (1) EP2050936A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011118691A1 (de) 2011-11-16 2012-07-05 Daimler Ag Verbrennungsmotor mit einer integrierten Abgasnachbehandlungseinrichtung
US20150233280A1 (en) * 2012-11-06 2015-08-20 Mtu Friedrichshafen Gmbh Mixture-charged gas engine and method for compensating for volumetric efficiency deviations in a mixture-charged gas engine

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100130079A1 (en) * 2005-12-12 2010-05-27 Brunswick Corporation Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other
US8205606B2 (en) * 2008-07-03 2012-06-26 International Engine Intellectual Property Company, Llc Model for inferring temperature of exhaust gas at an exhaust manifold using temperature measured at entrance of a diesel oxidation catalyst
US20110030349A1 (en) * 2009-08-04 2011-02-10 International Engine Intellectual Property Company, Llc Quick-heating of a urea supply conduit for an engine exhaust after-treatment system
US8950176B2 (en) * 2011-06-29 2015-02-10 Electro-Motive Diesel, Inc. System for reducing engine emissions and backpressure using parallel emission reduction equipment
JP5609795B2 (ja) * 2011-07-12 2014-10-22 株式会社デンソー 車両用過給装置
DE202015101395U1 (de) * 2015-03-18 2016-06-24 2G Energy AG Stationärmotorabgassystem und als Blockheizkraftwerk oder Genset ausgebildete Vorrichtung
WO2019084091A1 (fr) * 2017-10-26 2019-05-02 500 Group, Inc. Collecteur d'échappement à angle double
JP7006138B2 (ja) 2017-11-01 2022-01-24 いすゞ自動車株式会社 後処理装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000046A (en) * 1977-07-01 1979-01-04 Johnson Matthey Co Ltd Catalytic Conversion of Exhaust Gas

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US3644098A (en) * 1969-09-18 1972-02-22 Universal Oil Prod Co Catalytic converter for exhaust gases
US3972184A (en) * 1972-04-20 1976-08-03 Ethyl Corporation Catalytic treatment of exhaust gas responsive to engine temperature
JPH0623535B2 (ja) * 1985-10-28 1994-03-30 日産自動車株式会社 内燃機関の排気微粒子処理装置
JP3116628B2 (ja) * 1993-01-21 2000-12-11 株式会社日本自動車部品総合研究所 吸着装置
US5846502A (en) * 1996-01-16 1998-12-08 Ford Global Technologies, Inc. Mini-cascade catalyst system
ES2187743T3 (es) * 1996-05-23 2003-06-16 Scambia Ind Dev Ag Colector de escape con catalizador.
ES2253419T3 (es) * 2000-09-20 2006-06-01 Toyota Jidosha Kabushiki Kaisha Filtro y metodo para el control de las emisiones de gases de escape.
DE10247989A1 (de) * 2002-10-15 2004-04-29 Robert Bosch Gmbh Abgasreinigung einer Brennkraftmaschine und Verfahren zur Reinigung deren Abgase

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000046A (en) * 1977-07-01 1979-01-04 Johnson Matthey Co Ltd Catalytic Conversion of Exhaust Gas

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011118691A1 (de) 2011-11-16 2012-07-05 Daimler Ag Verbrennungsmotor mit einer integrierten Abgasnachbehandlungseinrichtung
US20150233280A1 (en) * 2012-11-06 2015-08-20 Mtu Friedrichshafen Gmbh Mixture-charged gas engine and method for compensating for volumetric efficiency deviations in a mixture-charged gas engine
US9670828B2 (en) * 2012-11-06 2017-06-06 Mtu Friedrichshafen Gmbh Mixture-charged gas engine and method for compensating for volumetric efficiency deviations in a mixture-charged gas engine

Also Published As

Publication number Publication date
US20090094966A1 (en) 2009-04-16
EP2050936A3 (fr) 2010-01-20

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