US20090084920A1 - Exhaust gas recirculation line holder - Google Patents

Exhaust gas recirculation line holder Download PDF

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Publication number
US20090084920A1
US20090084920A1 US11/904,596 US90459607A US2009084920A1 US 20090084920 A1 US20090084920 A1 US 20090084920A1 US 90459607 A US90459607 A US 90459607A US 2009084920 A1 US2009084920 A1 US 2009084920A1
Authority
US
United States
Prior art keywords
exhaust gas
gas recirculation
holder
recirculation line
line
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
US11/904,596
Inventor
Victor Cerabone
Harald Gieb
Michael Hoffmann
Jochen Stosser
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
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 Daimler AG filed Critical Daimler AG
Priority to US11/904,596 priority Critical patent/US20090084920A1/en
Assigned to DAIMLERAG reassignment DAIMLERAG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CERABONE, VICTOR, GIEB, HARALD, HOFFMANN, MICHAEL, STOSSER, JOCHEN
Priority to DE102008047503A priority patent/DE102008047503A1/en
Publication of US20090084920A1 publication Critical patent/US20090084920A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K5/12—Arrangement of engine supports
    • 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
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • 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
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • 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

Definitions

  • the invention relates to an exhaust gas recirculation line holder of an internal combustion engine.
  • An exhaust gas recirculation system is used to reduce nitrogen oxides (NO x ) during combustion of fuels in internal combustion engines, for example in Otto or diesel engines, in order to adhere to the stipulated emissions limit values specifically for internal combustion engines.
  • NO x nitrogen oxides
  • the exhaust gas recirculation line is usually configured in the form of a connecting pipe extending between an exhaust gas pipe and an intake pipe and is provided with a control valve.
  • fresh air which is sucked in by the intake pipe is mixed with exhaust gas which is recirculated from the exhaust gas pipe.
  • the calorific value of a fuel/combustion gas mixture is reduced and the temperature which is required for the formation of nitrogen oxides is no longer reached in the combustion chamber.
  • DE 197 01 873 C1 discloses a holding device for an exhaust gas recirculation line of an internal combustion engine, wherein the exhaust gas recirculation line is supported on the internal combustion engine via a support which is fixed to the engine. A line section of the exhaust gas recirculation line is included in the support to form one component.
  • the holder In an exhaust gas recirculation line holder of an internal combustion engine wherein a line section of an exhaust gas recirculation line is integrated into the holder which is supported on the engine block and/or the vehicle frame, the holder is provided with a shaped part, in particular a cast part, with the line section of the exhaust gas recirculation line formed therein and a support structure also being formed integrally with the holder.
  • a part of the connecting component is preferably in the form of a support element, in particular a support eye.
  • the integrated line section of the exhaust gas recirculation line for integration into the connecting structure preferably has an enlarged flow cross section, as a result of which the pressure drop is reduced.
  • Higher exhaust gas recirculation rates can be achieved as a result of the increase in the line cross section.
  • the emission of nitrogen oxides, in particular of a motor vehicle can be reduced.
  • the latter is utilized in an optimum manner and the weight is reduced considerably.
  • the connecting structure is formed with the suspension eye and the integrated exhaust gas recirculation line as a shaped part.
  • the connecting structure is formed with the suspension eye and the integrated exhaust gas recirculation line as a shaped part.
  • FIG. 1 is a perspective view of an exhaust gas recirculation line holder having an integrated exhaust gas recirculation line and suspension elements for connection to the engine block,
  • FIG. 2 diagrammatically shows the connecting component according to FIG. 1 in a longitudinal sectional view
  • FIG. 3 diagrammatically shows the holder of FIG. 1 in cross section.
  • FIG. 1 shows a holder 1 of a partially integrated exhaust gas recirculation line 2 for an internal combustion engine (not shown).
  • the holder 1 is arranged in the form of a connecting component between an engine block (not shown) and a vehicle frame (not shown).
  • a connecting component between an engine block (not shown) and a vehicle frame (not shown).
  • the holder 1 will be described in detail using the connecting component which is denoted in the following text by the reference numeral 1 .
  • the holder 1 in the exemplary embodiment has two reinforcing elements 3 (also called a support) which are formed as a single piece and are in the form of fastening flanges.
  • the holder 1 is firstly supported on the engine block or vehicle frame via said reinforcing elements 3 .
  • the holder 1 is fastened via the reinforcing elements 3 by screw- or threaded bolt connections to the engine block and/or vehicle frame by means of fastening elements which extend through holes 5 of the reinforcing elements 3 .
  • the holder 1 according to the invention is configured as a support element 4 .
  • this support element 4 also called a support eye
  • components which are integrated into the holder 1 such as, for example, a part 2 . 1 of the exhaust gas recirculation line 2 , can be supported on the vehicle frame.
  • the support element 4 is configured to have for example a circular opening for inserting hooks or the like.
  • a line section 2 . 1 of the exhaust gas recirculation line 2 is integrated into the holder 1 itself.
  • the integrated line section 2 . 1 of the exhaust gas recirculation line 2 is in the form of a cylindrical hollow body, through which exhaust gases flow.
  • the integrated line section 2 . 1 has a slightly curved profile in the longitudinal extent.
  • the support element 4 is arranged above the curvature of the integrated part 2 . 1 .
  • Connecting points 6 are formed at openings 6 on the flow inlet side and the flow outlet side of the integrated line section 2 .
  • the mixer serves to mix the exhaust gases with fresh air which is supplied, for example, via an intake line 8 which extends in sections parallel to the exhaust gas recirculation line 2 .
  • the holder 1 is formed with the integrated line section 2 . 1 of the exhaust gas recirculation line 2 and the suspension element 4 as a shaped part.
  • the holder 1 can preferably be produced in a casting process as a cast part, for example of an aluminum alloy.
  • FIG. 2 shows a diagrammatic cross-sectional view of the holder 1 with integrated exhaust gas recirculation line 2 , in longitudinal section.
  • the holder 1 which is configured as a support structure 4
  • the holder 1 is suspended on the vehicle frame by means of a holding element, for example a hook, which is hooked into the support element 4 .
  • the support structure 4 is arranged above the integrated line section 2 . 1 of the exhaust gas recirculation line 2 .
  • the reinforcing elements 3 with the openings 5 for fastening to the engine block or the vehicle frame are formed below the integrated line section 2 . 1 .
  • the integrated line section 2 . 1 of the exhaust gas recirculation line 2 extends in a curved manner within the holder 1 , in such a way that the support structure 4 is arranged in the curvature region between the straight flow inlet 2 . 1 . 1 and the straight flow outlet 2 . 1 . 2 of the line section 2 . 1 .
  • the flow inlet 2 . 1 . 1 and the flow outlet 2 . 1 . 2 are arranged offset with respect to one another.
  • connecting points 6 for example in the form of connecting flanges, are formed at the flow inlet 2 . 1 . 1 and the flow outlet 2 . 1 . 2 , to which connecting points 6 the line sections 2 . 2 and 2 . 3 on the flow inlet side and the flow outlet side of the exhaust gas recirculation line 2 can be connected.
  • FIG. 3 diagrammatically shows, in a longitudinal sectional view, the holder 1 with the integrated line section 2 . 1 of the exhaust gas recirculation line 2 .
  • the holder 1 of the exhaust gas recirculation line 2 can be supported on the engine block or the vehicle frame via the protruding reinforcing elements 3 and is fastened in a force-transmitting manner via the openings 5 by means of fastening elements.
  • the components of the holder 1 namely the integrated line section 2 . 1 , the support element 4 and the reinforcing elements 3 and therefore the holder 1 itself, are configured as a shaped part, for example as a cast part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

In an exhaust gas recirculation line holder of an internal combustion engine wherein a line section of an exhaust gas recirculation line is integrated into the holder which is supported on the engine block and/or the vehicle frame, the holder is provided with a shaped part, in particular a cast part, with the line section of the exhaust gas recirculation line formed therein and a support structure also being formed integrally with the holder so that manufacturing costs, assembly time and assembly expenditure are reduced.

Description

    BACKGROUND OF THE INVENTION
  • The invention relates to an exhaust gas recirculation line holder of an internal combustion engine.
  • An exhaust gas recirculation system is used to reduce nitrogen oxides (NOx) during combustion of fuels in internal combustion engines, for example in Otto or diesel engines, in order to adhere to the stipulated emissions limit values specifically for internal combustion engines.
  • The exhaust gas recirculation line is usually configured in the form of a connecting pipe extending between an exhaust gas pipe and an intake pipe and is provided with a control valve. Here, fresh air which is sucked in by the intake pipe is mixed with exhaust gas which is recirculated from the exhaust gas pipe. As a result, the calorific value of a fuel/combustion gas mixture is reduced and the temperature which is required for the formation of nitrogen oxides is no longer reached in the combustion chamber.
  • DE 197 01 873 C1 discloses a holding device for an exhaust gas recirculation line of an internal combustion engine, wherein the exhaust gas recirculation line is supported on the internal combustion engine via a support which is fixed to the engine. A line section of the exhaust gas recirculation line is included in the support to form one component.
  • It is the object of the invention to provide an improved exhaust gas recirculation line holder of an internal combustion engine, which reduces time and costs required for the assembly and utilizes installation space in an optimum manner.
    • SUMMARY OF THE INVENTION
  • In an exhaust gas recirculation line holder of an internal combustion engine wherein a line section of an exhaust gas recirculation line is integrated into the holder which is supported on the engine block and/or the vehicle frame, the holder is provided with a shaped part, in particular a cast part, with the line section of the exhaust gas recirculation line formed therein and a support structure also being formed integrally with the holder.
  • As a result of this integrated configuration of the exhaust gas recirculation line in a connecting component, the installation space available within the engine compartment is utilized in an optimum manner. A part of the connecting component is preferably in the form of a support element, in particular a support eye. As a result of the integration of a line section of the exhaust gas recirculation line into a connecting component which also includes a support structure in the form of a suspension eye, an additional separate holding device is not needed, as a result of which the manufacturing and assembly costs and assembly time and also the weight of the arrangement are reduced.
  • In one particular embodiment, the integrated line section of the exhaust gas recirculation line for integration into the connecting structure preferably has an enlarged flow cross section, as a result of which the pressure drop is reduced. Higher exhaust gas recirculation rates can be achieved as a result of the increase in the line cross section. As a result, the emission of nitrogen oxides, in particular of a motor vehicle, can be reduced. As a result of the increase in the line cross section using the same amount of installation space, the latter is utilized in an optimum manner and the weight is reduced considerably.
  • In one particularly simple embodiment, the connecting structure is formed with the suspension eye and the integrated exhaust gas recirculation line as a shaped part. As a result, separate holding and connecting elements for holding and fastening the exhaust gas recirculation line can be omitted.
  • Exemplary embodiments of the invention will be described in greater detail below on the basis of the accompanying drawings:
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a perspective view of an exhaust gas recirculation line holder having an integrated exhaust gas recirculation line and suspension elements for connection to the engine block,
  • FIG. 2 diagrammatically shows the connecting component according to FIG. 1 in a longitudinal sectional view, and
  • FIG. 3 diagrammatically shows the holder of FIG. 1 in cross section.
    •  DESCRIPTION OF PREFERRED EMBODIMENT
  • Parts which correspond to one another are provided with the same designations in all the figures.
  • FIG. 1 shows a holder 1 of a partially integrated exhaust gas recirculation line 2 for an internal combustion engine (not shown).
  • The holder 1 is arranged in the form of a connecting component between an engine block (not shown) and a vehicle frame (not shown). In the following text, the holder 1 will be described in detail using the connecting component which is denoted in the following text by the reference numeral 1.
  • In order to hold and fasten the holder 1 on the engine block and/or on the vehicle frame, the holder 1 in the exemplary embodiment has two reinforcing elements 3 (also called a support) which are formed as a single piece and are in the form of fastening flanges. The holder 1 is firstly supported on the engine block or vehicle frame via said reinforcing elements 3. Secondly, the holder 1 is fastened via the reinforcing elements 3 by screw- or threaded bolt connections to the engine block and/or vehicle frame by means of fastening elements which extend through holes 5 of the reinforcing elements 3.
  • Moreover, the holder 1 according to the invention is configured as a support element 4. As a result of this support element 4 (also called a support eye), components which are integrated into the holder 1, such as, for example, a part 2.1 of the exhaust gas recirculation line 2, can be supported on the vehicle frame. For this purpose, the support element 4 is configured to have for example a circular opening for inserting hooks or the like.
  • In order to configure the holder 1 as a support device for the exhaust gas recirculation line 2, a line section 2.1 of the exhaust gas recirculation line 2 is integrated into the holder 1 itself. The integrated line section 2.1 of the exhaust gas recirculation line 2 is in the form of a cylindrical hollow body, through which exhaust gases flow. Here, the integrated line section 2.1 has a slightly curved profile in the longitudinal extent. The support element 4 is arranged above the curvature of the integrated part 2.1. Connecting points 6, in particular flanges, are formed at openings 6 on the flow inlet side and the flow outlet side of the integrated line section 2.1 of the exhaust gas recirculation line 2, to which connecting points 6 a line section 2.2 of the exhaust gas recirculation line 2 which comes from the exhaust duct (not shown) of the engine and a line section 2.3 of the exhaust gas recirculation line 2 which leads away to a mixer (not shown) can be connected via connecting elements (not shown). Here, the mixer serves to mix the exhaust gases with fresh air which is supplied, for example, via an intake line 8 which extends in sections parallel to the exhaust gas recirculation line 2.
  • The holder 1 is formed with the integrated line section 2.1 of the exhaust gas recirculation line 2 and the suspension element 4 as a shaped part. The holder 1 can preferably be produced in a casting process as a cast part, for example of an aluminum alloy.
  • FIG. 2 shows a diagrammatic cross-sectional view of the holder 1 with integrated exhaust gas recirculation line 2, in longitudinal section.
  • During the use of the holder 1 which is configured as a support structure 4, the holder 1 is suspended on the vehicle frame by means of a holding element, for example a hook, which is hooked into the support element 4. For this purpose, the support structure 4 is arranged above the integrated line section 2.1 of the exhaust gas recirculation line 2. The reinforcing elements 3 with the openings 5 for fastening to the engine block or the vehicle frame are formed below the integrated line section 2.1.
  • Here, the integrated line section 2.1 of the exhaust gas recirculation line 2 extends in a curved manner within the holder 1, in such a way that the support structure 4 is arranged in the curvature region between the straight flow inlet 2.1.1 and the straight flow outlet 2.1.2 of the line section 2.1. As a result of the curvature of the line section 2.1, the flow inlet 2.1.1 and the flow outlet 2.1.2 are arranged offset with respect to one another. In each case connecting points 6, for example in the form of connecting flanges, are formed at the flow inlet 2.1.1 and the flow outlet 2.1.2, to which connecting points 6 the line sections 2.2 and 2.3 on the flow inlet side and the flow outlet side of the exhaust gas recirculation line 2 can be connected.
  • FIG. 3 diagrammatically shows, in a longitudinal sectional view, the holder 1 with the integrated line section 2.1 of the exhaust gas recirculation line 2.
  • The holder 1 of the exhaust gas recirculation line 2 can be supported on the engine block or the vehicle frame via the protruding reinforcing elements 3 and is fastened in a force-transmitting manner via the openings 5 by means of fastening elements. Here, the components of the holder 1, namely the integrated line section 2.1, the support element 4 and the reinforcing elements 3 and therefore the holder 1 itself, are configured as a shaped part, for example as a cast part.

Claims (3)

1. A holder of an exhaust gas recirculation line (2) of an internal combustion engine of a motor vehicle having an exhaust gas recirculation line (2) branching off from an area of the exhaust pipe of the engine which is close to the engine and being connected to an intake line of the internal combustion engine, a line section (2.1) of the exhaust gas recirculation line (2) being integrated into the holder (1) which is supported on one of the engine block and a vehicle frame.
2. The holder as claimed in claim 1, wherein a part of the holder (1) is in the form of a support structure (4) facilitating its support on the engine or the vehicle frame.
3. The holding device as claimed in claim 1, wherein the holder (1) is formed with at least one of integrated line section (2.1) in communication with the exhaust gas recirculation line (2) and an integrated support structure (4) in the form of a shaped part.
US11/904,596 2007-09-27 2007-09-27 Exhaust gas recirculation line holder Abandoned US20090084920A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/904,596 US20090084920A1 (en) 2007-09-27 2007-09-27 Exhaust gas recirculation line holder
DE102008047503A DE102008047503A1 (en) 2007-09-27 2008-09-17 Holder of an exhaust gas recirculation line of an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/904,596 US20090084920A1 (en) 2007-09-27 2007-09-27 Exhaust gas recirculation line holder

Publications (1)

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US20090084920A1 true US20090084920A1 (en) 2009-04-02

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US11/904,596 Abandoned US20090084920A1 (en) 2007-09-27 2007-09-27 Exhaust gas recirculation line holder

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110315129A1 (en) * 2010-06-25 2011-12-29 Mazda Motor Corporation Exhaust gas recirculation device of engine
FR2986745A1 (en) * 2012-02-15 2013-08-16 Peugeot Citroen Automobiles Sa ENGINE SUPPORT INCORPORATING AN EXHAUST GAS RECIRCULATION DUCT, ADAPTED CYLINDER HEAD AND CORRESPONDING VEHICLE
US10119498B2 (en) * 2017-02-01 2018-11-06 GM Global Technology Operations LLC Enhanced long route EGR cooler arrangement with bypass

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19701873C1 (en) 1997-01-21 1998-06-04 Daimler Benz Ag Retainer for exhaust gas recirculation conduit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110315129A1 (en) * 2010-06-25 2011-12-29 Mazda Motor Corporation Exhaust gas recirculation device of engine
US9010304B2 (en) * 2010-06-25 2015-04-21 Mazda Motor Corporation Exhaust gas recirculation device of engine
FR2986745A1 (en) * 2012-02-15 2013-08-16 Peugeot Citroen Automobiles Sa ENGINE SUPPORT INCORPORATING AN EXHAUST GAS RECIRCULATION DUCT, ADAPTED CYLINDER HEAD AND CORRESPONDING VEHICLE
WO2013121121A1 (en) * 2012-02-15 2013-08-22 Peugeot Citroën Automobiles SA Engine mounting having a built-in exhaust-gas recirculation pipe, adapted cylinder head, and corresponding vehicle
US10119498B2 (en) * 2017-02-01 2018-11-06 GM Global Technology Operations LLC Enhanced long route EGR cooler arrangement with bypass

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Publication number Publication date
DE102008047503A1 (en) 2009-04-30

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AS Assignment

Owner name: DAIMLERAG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CERABONE, VICTOR;GIEB, HARALD;HOFFMANN, MICHAEL;AND OTHERS;REEL/FRAME:020296/0339

Effective date: 20071105

STCB Information on status: application discontinuation

Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION