US20080216469A1 - Device for Controlling an Exhaust Gas Stream - Google Patents

Device for Controlling an Exhaust Gas Stream Download PDF

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Publication number
US20080216469A1
US20080216469A1 US12/065,816 US6581606A US2008216469A1 US 20080216469 A1 US20080216469 A1 US 20080216469A1 US 6581606 A US6581606 A US 6581606A US 2008216469 A1 US2008216469 A1 US 2008216469A1
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US
United States
Prior art keywords
exhaust gas
housing
actuating element
ducts
actuator
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
US12/065,816
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English (en)
Inventor
Claus Beck
Karsten Emrich
Michael Halblaub
Dieter Werner
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Assigned to BEHR GMBH & CO. KG reassignment BEHR GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HALBLAUB, MICHAEL, WERNER, DIETER, EMRICH, KARSTEN, BECK, CLAUS
Publication of US20080216469A1 publication Critical patent/US20080216469A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
    • F02M26/57—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves using electronic means, e.g. electromagnetic valves
    • 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
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • 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
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
    • 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
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors

Definitions

  • the present invention relates to a device for controlling an exhaust gas stream according to the preamble of claim 1 .
  • exhaust gas recirculation systems are increasingly being used to reduce pollutant emissions.
  • These and other systems need devices for regulating and controlling exhaust gas streams, which require independent developments based on the particular requirements such as overall space (especially in passenger motor vehicles), temperature, costs and reliability.
  • DE 102 03 003 A1 describes an exhaust gas heat exchanger having a housing of rectangular cross section, which encloses a heat exchanger through-flow area and a bypass through-flow area.
  • a control flap mechanically driven by a rotary shaft is provided, by means of which an admission exhaust gas stream can be led either to the heat exchanger area or to the bypass area.
  • a regulating valve downstream of and structurally separated from the heat exchanger is moreover schematically described, which serves for adjusting the aggregate quantity of an exhaust gas stream recirculated to the internal combustion engine.
  • the object of the invention is to specify a device for controlling an exhaust gas stream, which takes up an exceptionally small overall space and which exhibits a high degree of integration of the components.
  • the housing with the two actuating elements moreover only constitutes one single modular unit, which affords logistical advantages and reduces costs.
  • retaining two separate actuating elements, which serve on the one hand for adjusting the aggregate exhaust gas stream and on the other for distributing the exhaust gas stream between two different exhaust gas ducts makes it possible to retain an especially high degree of flexibility in the adjustment of an exhaust gas ducting, particularly an exhaust gas recirculation for a passenger vehicle diesel engine.
  • the first of the exhaust gas ducts is connected to an exhaust gas cooler and the second of the exhaust gas ducts to a bypass line for bypassing the exhaust gas cooler.
  • the bypass line is arranged in a common housing together with the exhaust gas cooler.
  • the actuating element may be driven via a shaft rotatably supported on the housing.
  • the rotatable shaft can furthermore preferably be driven via an actuator supported on the housing, so that the drive unit or the actuator of the first actuating element forms a modular unit together with the device according to the invention.
  • valve seat of the second actuating element is provided on the housing.
  • the valve seat may be formed in casting of the housing, followed by any finish-machining required. It may also be a matter, however, of fixedly attaching a separate valve seat to the housing, either by pressing it in or by means of a positively interlocking connection. This is preferably the case when the housing material is not suited to the forming of a valve seat.
  • the second actuating element has a valve disk which corresponds to the valve seat and is connected via a valve rod to an actuator. It is particularly preferred if a sub-assembly of the second actuating element, comprising the valve rod and the valve seat, can be detachably connected to the housing. This makes the second actuating element, according to its design type, especially well-suited to proportioning of the exhaust gas stream and at the same time easily accessible for servicing.
  • the housing in the area of the first and the second exhaust gas duct the housing has a substantially rectangular cross section enclosing both ducts.
  • the cross section may also have a different shape.
  • Exhaust gas coolers with integral bypass duct, as disklosed by the aforementioned DE 102 03 003 A1, for example, which can be connected to the housing in the area of the first and the second exhaust gas duct, are a matter of common knowledge. Such a connection is commonly achieved by permanent welding, but may be a detachable connection, however, where necessary incorporating a means of sealing and in the nature of a bolted flange. Such a detachable connection would make the first actuating element, in particular, easily accessible for servicing.
  • a third exhaust gas duct on the housing, which forms a feed or a diskharge for the entire exhaust gas stream of the first and second exhaust gas ducts.
  • a device according to the invention can therefore generally be used so that the actuating elements are assigned to a third exhaust gas duct on the outlet or inlet side.
  • the third exhaust gas duct preferably has a substantially circular cross section.
  • the third exhaust gas duct in an adjoining area of the housing, has a different direction to the first and second exhaust gas ducts, the directions of the first and second exhaust gas ducts, in particular, being identical and the direction of the third exhaust gas duct running at an angle of approximately 90° to this.
  • the second actuating element is first arranged in the housing, followed by the first actuating element and then the first and the second exhaust gas ducts.
  • An actuator of the first actuating element and/or an actuator of the second actuating element is/are preferably embodied as a pressure capsule. This represents a cost-effective way of providing a drive for the respective actuating element.
  • An actuator of the first actuating element and/or an actuator of the second actuating element is/are preferably embodied as an electromechanical component. This makes it possible to achieve precise intermediate positions of the actuating elements.
  • FIG. 1 shows a three-dimensional overall view of a device according to the invention.
  • FIG. 2 shows the device in FIG. 1 from a different perspective.
  • FIG. 3 shows a further three-dimensional view of the device in FIG. 1 , a sub-assembly with parts of a second actuating element being represented separately.
  • FIG. 4 shows a plan view from the side of the device in FIG. 3 .
  • the central element of the device according to the invention is a relatively intricately formed housing 1 , which is here manufactured as an integral component by a casting process.
  • the housing may also be assembled from multiple individual parts, in particular by welding or also by means of detachable connections.
  • the housing 1 has an opening 2 of substantially rectangular cross section, which according to FIG. 1 is oriented slanting obliquely to the left out of the plane of projection.
  • This opening 2 forms the end of a first exhaust gas duct 3 and the end of a second exhaust gas duct 4 .
  • the two exhaust gas ducts 3 , 4 are separated from one another by a first actuating element 5 embodied as a flap.
  • An end baffle plate 5 a of the actuating element 5 terminates in the area of the opening 2 , where it defines the separation of the two exhaust gas ducts 3 , 4 .
  • the moving flap 5 is mounted on a rotatable shaft 6 , which passes through an outer wall of the housing 1 and is rotatably supported against the housing 1 in the area of this passage.
  • the moving flap 5 bears on seat edges 5 b in each of the limit positions of its displacement travel. In each of these limit positions one of the exhaust gas ducts 3 , 4 is fully closed and the other fully opened.
  • the rotary shaft 6 is provided with a return spring 7 , an eccentric pivot 8 of the rotary shaft 6 being connected by a push rod 9 to an actuator 10 of the first actuating element 5 .
  • the actuator 10 is firmly connected to the housing 1 by a retaining plate 11 .
  • the actuator 10 takes the form of a vacuum control unit with a vacuum connection 10 a.
  • a torsion of the rotatable shaft 6 driven by the actuator 10 is capable of producing an adjustment of the control flap 5 , such that either the first exhaust gas duct 3 or the second exhaust gas duct 4 is fully or almost fully closed. It is also possible, however, to set an intermediate position, in which an aggregate exhaust gas stream is distributed between the two exhaust gas ducts 3 , 4 in a ratio varying as a function of the position of the control flap.
  • An exhaust gas cooler (not shown) having an integral bypass line has a substantially rectangular cross section and is designed to be connected to the rectangular opening 2 in the housing 1 .
  • This connection is, in this case, a permanent connection and is made by welding or brazing. This type of connection will withstand the generally high temperatures in the area of the opening 2 .
  • a third exhaust gas duct 12 of the housing 1 terminates in an opening 12 a of circular cross section. Via this third exhaust gas duct 12 , the housing 1 can be connected via pipes (not shown) to a central exhaust line of an internal combustion engine of a passenger motor vehicle, the connection generally being made to a fixed branch.
  • the third exhaust gas duct After the circular connection opening 12 a , the third exhaust gas duct has a 90° bend (see FIG. 2 , in particular) and then enters into a widened, substantially cylindrical section 13 of the housing 1 .
  • a valve seat 14 of a second actuating element 15 is provided on the housing 1 .
  • this is a finish-machined area, which is integrally formed with the rest of the housing 1 .
  • it may also be a pressed-in valve seat made from some other material.
  • the cylindrical section 13 In its wall the cylindrical section 13 has an opening 16 , to which the further housing configuration is joined, the cross section of the third exhaust gas duct widening behind the opening 16 .
  • the exhaust gas stream of the third exhaust gas duct is adjustably distributed to the first exhaust gas duct 3 and the second exhaust gas duct by means of the control flap 5 .
  • a flange 17 is provided, to which a sub-assembly of the second actuating element 15 can be tightly bolted.
  • This sub-assembly of the second actuating element 15 comprises a second actuator 18 and a translatory valve rod 19 , connected to the actuator 18 and having a valve disk 20 , fixed to the end of the valve rod 19 , and a mating flange 21 .
  • the actuator 18 likewise takes the form of a vacuum control unit having a pressure connection 18 a .
  • An electrical connection 18 b serves for controlled activation of the actuator 18 , a vacuum regulating valve (not shown) being provided in the actuator 18 .
  • valve rod 19 with the valve disk projects into the cylindrical section 13 of the housing 1 .
  • the valve rod 19 when fully run out from the actuator 18 , can press the valve disk 20 tightly into the valve seat 14 , so that no more exhaust gas can pass through the cylindrical area 13 and the opening 16 .
  • a controlled retraction of the valve rod 19 is capable of achieving a defined and proportioned exposure of the opening, so that an aggregate exhaust gas stream of the device according to the invention can be regulated by the second actuating element 15 .
  • the exhaust gas stream impinges on the valve 14 , 19 , 20 in the opening direction. However, it may also impinge in the closing direction.
  • the opening 12 a of the third exhaust gas duct 12 is oriented in a direction which runs substantially perpendicular to the direction of the parallel exhaust gas ducts 3 , 4 .
  • This takes account of an actual, given overall space in a passenger motor vehicle engine compartment. It will be seen that through suitable modification of the connection area of the third exhaust gas duct 12 and a modification of the housing 1 , especially in respect of the orientation of the cylindrical area 13 relative to the exhaust gas ducts 3 , 4 , account can also be taken of some other given overall space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Exhaust Silencers (AREA)
US12/065,816 2005-09-08 2006-07-31 Device for Controlling an Exhaust Gas Stream Abandoned US20080216469A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005044088.6 2005-09-08
DE102005044088A DE102005044088A1 (de) 2005-09-08 2005-09-08 Vorrichtung zur Steuerung eines Abgasstroms
PCT/EP2006/007554 WO2007028464A1 (de) 2005-09-08 2006-07-31 Vorrichtung zur steuerung eines abgasstroms

Publications (1)

Publication Number Publication Date
US20080216469A1 true US20080216469A1 (en) 2008-09-11

Family

ID=36954896

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/065,816 Abandoned US20080216469A1 (en) 2005-09-08 2006-07-31 Device for Controlling an Exhaust Gas Stream

Country Status (4)

Country Link
US (1) US20080216469A1 (de)
EP (1) EP1926906A1 (de)
DE (1) DE102005044088A1 (de)
WO (1) WO2007028464A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9695781B2 (en) 2013-10-31 2017-07-04 Pierburg Gmbh Valve system for internal combustion engines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100955213B1 (ko) 2009-08-25 2010-04-29 주식회사 유니크 이지알 밸브 일체형 바이패스 밸브
KR101016190B1 (ko) * 2010-04-12 2011-02-24 주식회사 유니크 차량용 바이패스 밸브

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030150434A1 (en) * 2000-07-28 2003-08-14 Leedham Stewart William Exhaust gas cooler with bypass tube and exhaust gas recirculation valve
US20040107949A1 (en) * 2002-01-16 2004-06-10 Sotsuo Miyoshi Exhaust gas recirculating device
US20040206342A1 (en) * 2003-04-15 2004-10-21 Moyer Michael A. Exhaust gas recirculation cooler with bypass flow
US20050039729A1 (en) * 2002-01-26 2005-02-24 Behr Gmbh & Co Kg Exhaust gas heat exchanger
US7077114B2 (en) * 2004-04-22 2006-07-18 Pierburg Gmbh Exhaust gas recirculation system for a combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004010117A1 (de) * 2003-02-27 2004-11-18 Denso Corp., Kariya Abgasrückführvorrichtung
DE10346250B4 (de) * 2003-10-06 2018-01-04 Bayerische Motoren Werke Aktiengesellschaft Abgaskühler mit einem Bypass

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030150434A1 (en) * 2000-07-28 2003-08-14 Leedham Stewart William Exhaust gas cooler with bypass tube and exhaust gas recirculation valve
US20040107949A1 (en) * 2002-01-16 2004-06-10 Sotsuo Miyoshi Exhaust gas recirculating device
US20050039729A1 (en) * 2002-01-26 2005-02-24 Behr Gmbh & Co Kg Exhaust gas heat exchanger
US7032577B2 (en) * 2002-01-26 2006-04-25 Behr Gmbh & Co. Kg Exhaust gas heat exchanger
US7168419B2 (en) * 2002-01-26 2007-01-30 Behr Gmbh & Co. Kg Exhaust gas heat exchanger
US20040206342A1 (en) * 2003-04-15 2004-10-21 Moyer Michael A. Exhaust gas recirculation cooler with bypass flow
US7077114B2 (en) * 2004-04-22 2006-07-18 Pierburg Gmbh Exhaust gas recirculation system for a combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9695781B2 (en) 2013-10-31 2017-07-04 Pierburg Gmbh Valve system for internal combustion engines

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Publication number Publication date
DE102005044088A1 (de) 2007-03-15
EP1926906A1 (de) 2008-06-04
WO2007028464A1 (de) 2007-03-15

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AS Assignment

Owner name: BEHR GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BECK, CLAUS;EMRICH, KARSTEN;HALBLAUB, MICHAEL;AND OTHERS;REEL/FRAME:020758/0668;SIGNING DATES FROM 20080310 TO 20080318

STCB Information on status: application discontinuation

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