US20120023902A1 - Exhaust system - Google Patents

Exhaust system Download PDF

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Publication number
US20120023902A1
US20120023902A1 US13/020,362 US201113020362A US2012023902A1 US 20120023902 A1 US20120023902 A1 US 20120023902A1 US 201113020362 A US201113020362 A US 201113020362A US 2012023902 A1 US2012023902 A1 US 2012023902A1
Authority
US
United States
Prior art keywords
exhaust
guide element
exhaust system
inflow funnel
embossment
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
US13/020,362
Other languages
English (en)
Inventor
Dennis ACKERSCHOTT
Roland EWERS
Fabian Fricke
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
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 Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Assigned to BENTELER AUTOMOBILTECHNIK GMBH reassignment BENTELER AUTOMOBILTECHNIK GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ACKERSCHOTT, DENNIS, EWERS, ROLAND, Fricke, Fabian
Publication of US20120023902A1 publication Critical patent/US20120023902A1/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
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to an exhaust system for a motor vehicle.
  • an exhaust system for a motor vehicle includes a housing having an inflow funnel defined by an expanding cross sectional area, and an exhaust-gas treatment device received in the housing and including a tubular guide element arranged in the inflow funnel and having a curvature with an outer side formed with at least one embossment.
  • exhaust gas routed in the exhaust pipe is deflected by the presence of the embossment to thereby impact on an insert of the exhaust-gas treatment device in an optimum manner.
  • This improves in particular the uniformity index on the surface area of a catalytic converter or particle filter, especially of the exhaust-gas treatment device that is configured as catalytic converter or particle filter, without any significant increase in resistance pressure in the exhaust flow.
  • the embossment can be arranged in a direction transversely to a flow direction of exhaust gas.
  • the exhaust flow is deflected and the flow rate is changed.
  • the deflection of the exhaust-gas flow by the embossment causes turbulences and deflections of the exhaust-gas flow. This deflection causes a slowdown in the flow rate when the exhaust-gas flow impacts the insert arranged in the exhaust-gas treatment device.
  • the embossment results in a targeted flow conduction to thereby attain a better utilization of the entire surface area of the catalytic converter or particle filter.
  • the embossment can be arranged on the guide element to point inwardly.
  • the embossment is directed towards the exhaust-gas flow.
  • the exhaust-gas flow is urged radially outwards against the outer side of the curvature.
  • the presence of the inwardly directed embossment causes a deflection of the exhaust-gas flow so that the exhaust-gas flow is prevented from simply flowing undisturbed along the outer surface of the curvature but rather is deflected into the interior of the guide element and thus into the interior of the inflow funnel.
  • a uniformly distributed and optimized flow pattern is attained when the exhaust-gas flow impacts the exhaust-gas treatment device.
  • the embossment may be configured to extend substantially across an entire cross sectional width of the guide element. As a result, the main flow portion of the exhaust-gas flow is deflected within the guide element.
  • the outer side of the guide element can be formed with two or more embossments which are arranged successively in flow direction of the exhaust gas.
  • an exhaust-gas treatment device in the form of a particle filter requires the exhaust-gas flow to exhibit an impact behavior which is different when the exhaust-gas treatment device is configured in the form of a catalytic converter.
  • the impact behavior can thus be targeted in a desired manner for various flows by appropriately arranging and dimensioning two or more embossments.
  • a catalytic converter requires for example an optimized impact surface already when starting the engine in order to rapidly heat the catalytic converter and render it quickly operational.
  • a diesel particle filter on the other hand, requires initially a conduction of a relatively cool exhaust-gas flow and is then heated up to operating temperature. Only at that instance is a targeted impact upon the filter insert of a particle filter appropriate.
  • the guide element has a cross sectional area which can be configured to change from a round shape to a noncircular shape.
  • noncircular relates hereby within the scope of the invention to a mixed configuration of a trapezoidal shape and an ellipse, or also to a triangular shape with rounded corners, a hemispherical shape, or a combination of the afore-stated configurations.
  • the cross sectional expansion results in a slowdown of the flow rate so that the flow against an end surface of the insert in the catalytic converter or particle filter is evened out.
  • the contact time between the exhaust gas and the insert of the exhaust-gas treatment device is advantageously prolonged.
  • the cross sectional area of the guide element expands in flow direction of the exhaust gas.
  • the cross sectional increase is continuous like the change in the cross sectional configuration, i.e. without sudden changes, so that pressure loss is kept to a minimum.
  • an exhaust pipe can engage an inlet opening of the guide element.
  • the components can be easily joined.
  • the presence of a gastight coupling can hereby be made possible through a form fit or material joint.
  • An example of a material joint includes a thermal joining process.
  • the guide element can be secured in an entry (or receiving) region of the inflow funnel. This simplifies manufacture.
  • the guide element can be coupled with the inflow funnel by a gastight material joint and/or formfit.
  • the insert of the exhaust-gas treatment device and the inflow funnel can jointly define an interior space, with the guide element having an outlet opening positioned within the interior space at a distance to the insert.
  • the outlet opening of the guide element may extend in a plane at an angle to a plane of an attachment zone of the exhaust-gas treatment device to the inflow funnel (end face of the insert).
  • the guide element and the inflow funnel can define a gap there between, with a distance between the inflow funnel and the guide element on the outer side of the curvature increasing in flow direction of exhaust gas.
  • the presence of the gap keeps thermal stress away from the outer side of the inflow funnel to a certain extent.
  • the thermal stress between the exhaust pipe ad the exhaust-gas treatment device can thus be minimized in the area of the inflow funnel. This extends service life of the overall system.
  • FIG. 1 is a cross sectional view of an exhaust-system tract according to the present invention with a guide element
  • FIG. 2 is a plan view of an exhaust-system tract according to the present invention with inserted guide element.
  • FIG. 1 there is shown a cross sectional view of an exhaust-system tract according to the present invention, generally designated by reference numeral 1 .
  • the exhaust tract 1 has an exhaust pipe 2 , an inflow funnel 3 , and a guide element 4 .
  • the exhaust pipe 2 has a circular tubular cross section and includes in flow direction S of the exhaust gas a coupling zone 5 which is embraced by the guide element 4 in a gastight manner, as indicated by reference numeral 6 .
  • the gastight coupling 6 may be realized by a material joint or by a form fit.
  • the inflow funnel 3 has an entry region A which is coupled in the coupling zone 5 with the guide element 4 in a gastight manner, e.g. by a material joint or form fit.
  • the entry region A of the inflow funnel 3 overlaps hereby the guide element 4 .
  • the guide element 4 is curved downwards and has an outer side 7 which is formed with two embossments 8 , 8 ′.
  • the embossments 8 , 8 ′ point inwards in a direction of the exhaust flow.
  • the embossments 8 , 8 ′ have a wavy configuration, as shown in FIG. 1 .
  • the embossments may be configured also more sharp-edged with tighter bending radii.
  • the leading embossment 8 as viewed in flow direction S, has a more pronounced curvature than the trailing embossment 8 ′.
  • a circumferential gap 9 which increases substantially steadily in flow direction S in relation to the outer side 7 of the guide element 4 .
  • the main stream of the exhaust gas flows along the outer side 7 of the curvature, i.e. this region is subject to particularly high thermal stress.
  • a thermal barrier is established for the inflow funnel 3 .
  • the guide element 4 has an outlet opening 11 which is oriented in a plane which lies within an interior space I defined by the inflow funnel 3 and an insert (not shown) of the exhaust-gas treatment device.
  • the plane of the outlet opening 11 extends, as shown in FIG. 1 , at an angle ⁇ in relation to a plane 12 in which the outlet opening of the inflow funnel 3 lies, with the angle ⁇ ranging between 0° and 45°, preferably between 0° and 30°. Currently preferred is a range between 0° and 20°.
  • the guide element 4 and the inflow funnel 3 have each a cross sectional area which widens in the flow direction S.
  • the increase of the cross sectional area may be continuous, as shown with reference to the inflow funnel 3 , or discontinuously, as shown with reference to the guide element 4 .
  • the cross sectional area of the guide element 4 is hereby smaller in the coupling zone 5 than the cross sectional area of the outlet opening 11 .
  • FIG. 2 shows a plan view of the inflow funnel 3 , with the outlet opening 11 of the guide element 14 shown by way of a plan view.
  • the embossment 8 ′ extends essentially over the entire width of the guide element 4 transversely to the flow direction S.
  • the outlet opening 11 has a substantially trapezoidal shape with rounded corners.
  • the cross sectional area of the outlet opening 11 is greater than the cross sectional area of the exhaust pipe 2 but smaller by more than 50% than the outlet opening of the inflow funnel 3 in the plane 12 ( FIG. 1 ). As a result, the flow rate is slowed down so as to realize an evening of the flow upon the exhaust-gas treatment device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
US13/020,362 2010-02-03 2011-02-03 Exhaust system Abandoned US20120023902A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010006829.2-13 2010-02-03
DE102010006829A DE102010006829B4 (de) 2010-02-03 2010-02-03 Abgasanlage

Publications (1)

Publication Number Publication Date
US20120023902A1 true US20120023902A1 (en) 2012-02-02

Family

ID=44585819

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/020,362 Abandoned US20120023902A1 (en) 2010-02-03 2011-02-03 Exhaust system

Country Status (3)

Country Link
US (1) US20120023902A1 (de)
JP (1) JP5476322B2 (de)
DE (1) DE102010006829B4 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2524258A (en) * 2014-03-17 2015-09-23 Gm Global Tech Operations Inc Aftertreatment device having an improved inlet cone
US10337449B2 (en) 2017-01-02 2019-07-02 Ford Global Technologies, Llc Internal combustion engine with cylinder head

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017200001A1 (de) * 2017-01-02 2018-07-05 Ford Global Technologies, Llc Brennkraftmaschine mit Zylinderkopf und Verfahren zur Herstellung eines Zylinderkopfes einer derartigen Brennkraftmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4209495A (en) * 1978-02-24 1980-06-24 Toyota Jidosha Kogyo Kabushiki Kaisha Catalytic converter system for an internal combustion engine
US5398504A (en) * 1992-01-31 1995-03-21 Mazda Motor Corporation Layout structure of catalytic converters
DE4440160A1 (de) * 1993-12-03 1995-06-08 Gen Motors Corp Katalysator-Diffusor
US5606857A (en) * 1994-07-11 1997-03-04 Toyota Jidosha Kabushiki Kaisha Exhaust system for an engine
US6010668A (en) * 1998-02-17 2000-01-04 General Motors Corporation End cone assembly and method for catalytic converter
US20070062679A1 (en) * 2005-06-30 2007-03-22 Agee Keith D Heat exchanger with modified diffuser surface
US20070095056A1 (en) * 2005-09-26 2007-05-03 Pacemaker Headers Pty Ltd Exhaust extractor manifold improvements

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903803A1 (de) 1989-02-09 1990-08-16 Bayerische Motoren Werke Ag Gehaeuse eines abgaskatalysators
DE19633563C2 (de) * 1996-08-21 1999-04-01 Porsche Ag Abgasanlage einer Brennkraftmaschine
FR2772071B1 (fr) * 1997-12-05 2000-01-14 Renault Dispositif d'echappement pour moteur a combustion interne
JP2000265830A (ja) * 1999-03-16 2000-09-26 Toyota Motor Corp モノリス触媒コンバータ及びその製造方法
DE10300384B4 (de) * 2003-01-09 2005-12-01 J. Eberspächer GmbH & Co. KG Abgasanlage
CA2525389C (en) * 2003-05-13 2012-11-27 Hess Engineering, Inc. Method and apparatus for manufacturing a catalytic converter
JP2006017018A (ja) * 2004-06-30 2006-01-19 Toyota Motor Corp 車両用排気管路の構造
JP5099684B2 (ja) * 2007-08-06 2012-12-19 ボッシュ株式会社 排気浄化装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4209495A (en) * 1978-02-24 1980-06-24 Toyota Jidosha Kogyo Kabushiki Kaisha Catalytic converter system for an internal combustion engine
US5398504A (en) * 1992-01-31 1995-03-21 Mazda Motor Corporation Layout structure of catalytic converters
DE4440160A1 (de) * 1993-12-03 1995-06-08 Gen Motors Corp Katalysator-Diffusor
US5606857A (en) * 1994-07-11 1997-03-04 Toyota Jidosha Kabushiki Kaisha Exhaust system for an engine
US6010668A (en) * 1998-02-17 2000-01-04 General Motors Corporation End cone assembly and method for catalytic converter
US20070062679A1 (en) * 2005-06-30 2007-03-22 Agee Keith D Heat exchanger with modified diffuser surface
US20070095056A1 (en) * 2005-09-26 2007-05-03 Pacemaker Headers Pty Ltd Exhaust extractor manifold improvements

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Machine Translation of DE 4440160 A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2524258A (en) * 2014-03-17 2015-09-23 Gm Global Tech Operations Inc Aftertreatment device having an improved inlet cone
US10337449B2 (en) 2017-01-02 2019-07-02 Ford Global Technologies, Llc Internal combustion engine with cylinder head

Also Published As

Publication number Publication date
DE102010006829A1 (de) 2011-09-29
DE102010006829B4 (de) 2013-08-14
JP2011157970A (ja) 2011-08-18
JP5476322B2 (ja) 2014-04-23

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Date Code Title Description
AS Assignment

Owner name: BENTELER AUTOMOBILTECHNIK GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ACKERSCHOTT, DENNIS;EWERS, ROLAND;FRICKE, FABIAN;REEL/FRAME:026112/0530

Effective date: 20110210

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION