EP2317093A2 - Dispositif destiné au refroidissement d'un flux de gaz d'échappement - Google Patents

Dispositif destiné au refroidissement d'un flux de gaz d'échappement Download PDF

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Publication number
EP2317093A2
EP2317093A2 EP10188159A EP10188159A EP2317093A2 EP 2317093 A2 EP2317093 A2 EP 2317093A2 EP 10188159 A EP10188159 A EP 10188159A EP 10188159 A EP10188159 A EP 10188159A EP 2317093 A2 EP2317093 A2 EP 2317093A2
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
exhaust
outlet nozzle
exhaust pipe
section
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Withdrawn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
EP10188159A
Other languages
German (de)
English (en)
Other versions
EP2317093A3 (fr
Inventor
Mattias Lang
Romain Brunet
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP2317093A2 publication Critical patent/EP2317093A2/fr
Publication of EP2317093A3 publication Critical patent/EP2317093A3/fr
Withdrawn legal-status Critical Current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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • 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
    • F01N2270/00—Mixing air with exhaust gases
    • F01N2270/02—Mixing air with exhaust gases for cooling exhaust gases or the apparatus
    • 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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives

Definitions

  • the invention relates to a device for cooling an exhaust gas stream, with an actuatable by the exhaust stream outlet nozzle, which projects into an open end of an adjacent exhaust pipe such that in a suction formed between the outlet and the exhaust pipe when passing the exhaust stream, a negative pressure relative to the environment generated is.
  • soot particle filters usually with so-called wall-flow filters, in which the engine exhaust gas penetrates a porous filter wall of a ceramic or metallic material.
  • soot particles contained in the engine exhaust are deposited on both the surface and in the interior of the filter wall, so that the exhaust gas back pressure increases with increasing degree of clogging of the filter wall.
  • the deposited soot particles are burned at regular intervals, including the temperature of the engine exhaust gas - for example, by using a soot particle filter upstream oxidation catalyst - temporarily increased to temperatures above 600 ° C.
  • a soot particle filter upstream oxidation catalyst - temporarily increased to temperatures above 600 ° C.
  • the device attachable to the exhaust tailpipe by means of a clamp or clamp comprises a nozzle mounted to an adjacent diverter housing by means of a plurality of radially disposed support struts such that as the exhaust gas flow passes through an inlet formed between the nozzle and the diverter housing, a partial vacuum to the aspiration becomes cooler Generate ambient air.
  • a partial vacuum to the aspiration becomes cooler Generate ambient air.
  • the tapering in the direction of passage of the exhaust gas flow form of the nozzle or the deflector housing leads to an undesirable increase in the exhaust gas back pressure in the exhaust system.
  • the device according to the invention for cooling an exhaust gas stream comprises an exhaust nozzle which can be acted upon by the exhaust gas stream and projects into an open end of an adjacent exhaust pipe such that a negative pressure relative to the environment can be generated in an intake region formed between the exhaust nozzle and the exhaust pipe when the exhaust gas stream passes. Furthermore, an adjusting means for changing the flow cross section of the outlet nozzle is provided.
  • the generation of the negative pressure takes place according to the Venturi principle, wherein the outlet nozzle extends into the open end of the exhaust pipe and one dependent on the flow cross-section Vacuum generated in the intake. Depending on its temperature, the ambient air sucked into the exhaust pipe due to the negative pressure leads to a corresponding cooling of the exhaust gas flow.
  • the flow cross section of the outlet nozzle can be increased by means of the actuating means such that an unhindered passage of the exhaust gas flow is possible. In this way, an undesirable increase in the exhaust gas backpressure can be limited to the regeneration phases of the soot particle filter.
  • the device according to the invention is characterized by a particularly simple structure, so that there is the possibility to accommodate this space-saving in the range of the particulate filter within an engine compartment of a powered by a diesel engine motor vehicle, in particular an agricultural utility vehicle.
  • the diesel engine is usually arranged in the engine compartment of the motor vehicle high temperature heat exchanger, which is part of a connected to the diesel engine liquid cooling circuit, the high-temperature heat exchanger is acted upon by a fan unit with cooling air, which is sucked in via a grille and downstream filter trays from the environment. Since the thus directed into the engine compartment air is largely free of impurities, an undesirable clogging of the suction formed between the outlet nozzle and the exhaust pipe is reliably avoided. additionally The resulting caused by the fan unit compression of the air in the engine compartment leads to an increased volume flow in the intake and thus to a more efficient cooling of the exhaust stream.
  • the change in the flow cross section of the outlet nozzle preferably takes place as a function of the exhaust gas temperature.
  • an enlargement of the flow cross-section caused by the adjusting means may be provided in the case of exhaust gas temperatures typically occurring during a regeneration phase of the soot particle filter.
  • the outlet nozzle may have a plurality of flexible blades for changing the flow cross-section.
  • the lamellae are formed, for example, in the form of finger-shaped baffles which are an integral part of an attachment strip which can be attached to an outlet connection of the soot particle filter, the guide plates projecting in the mounted state in the direction of the exhaust gas flow.
  • the outlet nozzle is an integral part of a filter housing enclosed by the soot particle filter and welded or otherwise firmly connected thereto.
  • the lamellae can be designed, in particular, as bimetallic elements, which occupy a bend which reduces the flow cross section of the outlet nozzle with increasing exhaust gas temperature.
  • the bimetallic elements at the same time form an actuating means for the temperature-dependent change of the flow cross section of the outlet nozzle.
  • the structure of such bimetallic elements is basically known. Accordingly, these consist of a metal strip having two interconnected metal layers with different coefficients of linear expansion.
  • the fins are preferably designed such that they lie against the open end of the exhaust pipe when falling below a predetermined threshold for the exhaust gas temperature threshold.
  • the slats take in this case a fully open position.
  • the specification of the threshold value is such that it is below the exhaust gas temperatures typically occurring during the regeneration phase of the soot particle filter in the range of 400 to 600 ° C.
  • a limiting means for conditioning the slats is provided at the open end of the exhaust pipe.
  • the limiting means may be formed in the shape of a circumferential along the inside of the open end of the exhaust pipe stop lip.
  • the stop lip is, for example, a bead formed on the open end of the exhaust pipe.
  • a heat-resistant seal in the form of a braided glass or ceramic fiber cord can be introduced into the bead.
  • the lamellae may be arranged in the circumferential direction of the outlet nozzle in an overlapping manner in the form of an aperture. Due to the overlap, an undesirable release of exhaust gases in the region of the outlet nozzle is reliably avoided.
  • the exhaust pipe is at least partially surrounded by a contact protection.
  • the contact protection in particular has the shape of a tubular cover, which is attached by means of a plurality of spacers along the outside of the exhaust pipe.
  • the tubular cover may, at least in the region of a tailpipe exhaust having a plurality of openings, which allow a circulation of existing between the exhaust pipe and the tubular cover air.
  • Fig. 1 shows an overall perspective view of an embodiment of the inventive device for cooling an exhaust gas flow exiting from a soot particulate filter on an agricultural utility vehicle, wherein Fig. 2 respectively.
  • Fig. 3 a detailed view of the in Fig. 1 illustrated embodiment of the device according to the invention during or outside a regeneration phase of the particulate filter reproduces.
  • the agricultural utility vehicle 10 embodied as a tractor by way of example comprises a soot particle filter 14 housed in an engine compartment 12, which is designed as a conventional wall-flow filter in which the engine exhaust gas produced by a diesel engine 16 of the agricultural utility vehicle 10 penetrates a porous filter wall of a ceramic or metallic material.
  • the soot particles contained in the engine exhaust are deposited here both on the surface and in the interior of the filter wall of the soot particle filter 14. Since the exhaust backpressure increases with increasing degree of clogging of the filter wall, the deposited soot particles are burned at regular intervals for regeneration of the soot particle filter 14, for which the temperature of the engine exhaust gas is temporarily increased to temperatures above 600 ° C. by using an oxidation catalytic converter upstream of the soot particle filter 14.
  • the device 20 For cooling the exhaust gas stream 18 emerging from the soot particle filter 14 and heated during the regeneration phase, the device 20 according to the invention comprises an outlet nozzle 22 formed on the soot particle filter 14 for leading out the filtered exhaust gas stream 18.
  • the generation of the negative pressure takes place according to the Venturi principle, wherein the outlet nozzle 24 extends into the open end 26 of the exhaust pipe 28 and generates a dependent on the respective flow cross-section vacuum in the intake region 30.
  • the ambient air 34 sucked into the exhaust pipe 28 due to the negative pressure in this case leads, depending on its temperature, to a corresponding cooling of the exhaust gas flow 18.
  • the outlet nozzle 24 for changing the flow cross-section on a plurality of flexible blades 36 which are arranged in the circumferential direction of the outlet nozzle 24 in an overlapping aperture.
  • the lamellae 36 are designed in the form of finger-shaped baffles which are an integral part of a fastening strip 40 attached to the outlet connection 22 by means of a clamping screw 38, the guide plates projecting in the mounted state in the direction of the exhaust gas flow 18.
  • the outlet port 22 is in this case an integral part of a filter housing 42 enclosed by the soot particle filter 14 and welded or otherwise firmly connected thereto.
  • the lamellae 36 are designed, for example, as bimetallic elements which occupy a bend which reduces the flow cross-section of the outlet nozzle 24 with increasing exhaust-gas temperature.
  • the bimetallic elements at the same time form an actuating means 44 for changing the flow cross section of the outlet nozzle 24 as a function of the exhaust gas temperature.
  • the lamellae 36 are designed such that they lie against the open end 26 of the exhaust pipe 28 when it falls below a threshold value set for the exhaust gas temperature.
  • the fins 36 in this case occupy a fully open position to allow unhindered passage of the exhaust flow 18. This condition is in Fig. 3 shown.
  • the specification of the threshold value is such that it is below the exhaust gas temperatures typically occurring during the regeneration phase of the soot particle filter 14 in the range of 400 to 600 ° C.
  • a limiting means 46 for supporting the fins 36 is provided.
  • the limiting means 46 is configured in the form of a stop lip 50 running along an inner side 48 of the open end 26 of the exhaust pipe 28.
  • the stop lip 50 is a flanging formed on the open end 26 of the exhaust pipe 28.
  • a heat-resistant seal 52 is introduced in the form of a braided glass or ceramic fiber cord.
  • Fig. 1 is the exhaust pipe 28 at least partially surrounded by a contact protection 54.
  • the contact guard 54 has the shape of a tubular cover 56, which is attached by means of a plurality of spacers, not shown, along the outside of the exhaust pipe 28.
  • the tubular cover 56 at least in the region of a tailpipe 58 on a plurality of openings 60, which allow a circulation of the present between the exhaust pipe 28 and the tubular cover 56 air.
  • the illustrated agricultural vehicle 10 is a tractor, a use of the device 20 according to the invention also in any other, powered by a diesel engine motor vehicles conceivable. In addition, it is also suitable for use in stationary applications, such as a generator driven by a diesel engine or the like.

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 Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
EP10188159.7A 2009-10-30 2010-10-20 Dispositif destiné au refroidissement d'un flux de gaz d'échappement Withdrawn EP2317093A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009046253A DE102009046253A1 (de) 2009-10-30 2009-10-30 Vorrichtung zur Kühlung eines Abgasstroms

Publications (2)

Publication Number Publication Date
EP2317093A2 true EP2317093A2 (fr) 2011-05-04
EP2317093A3 EP2317093A3 (fr) 2013-04-17

Family

ID=43530125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10188159.7A Withdrawn EP2317093A3 (fr) 2009-10-30 2010-10-20 Dispositif destiné au refroidissement d'un flux de gaz d'échappement

Country Status (5)

Country Link
US (1) US20110099990A1 (fr)
EP (1) EP2317093A3 (fr)
CN (1) CN102052134A (fr)
BR (1) BRPI1013480A2 (fr)
DE (1) DE102009046253A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2730764A1 (fr) * 2011-07-09 2014-05-14 Unicarriers Corporation Structure de joint de tuyau pour dispositif de traitement des gaz d'échappement pour véhicule industriel

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8935918B2 (en) * 2010-04-23 2015-01-20 GM Global Technology Operations LLC Reconfigurable mixer for an exhaust aftertreatment system and method of using the same
JP5886551B2 (ja) * 2011-07-19 2016-03-16 コベルコ建機株式会社 建設機械の排気構造
DE102011087675A1 (de) * 2011-12-02 2013-06-06 Deere & Company Kühlsystem zur aktiven Kühlung eines Abgassystems
US8720195B2 (en) 2012-02-14 2014-05-13 Deere & Company Exhaust assembly
IN2013DE01689A (fr) * 2013-06-05 2015-07-10 Caterpillar Global Mining Expanded Products Pty Ltd
US9140172B2 (en) * 2013-07-30 2015-09-22 GM Global Technology Operations LLC Gas flow distributing flexible coupling
CN104165081A (zh) * 2014-07-21 2014-11-26 昆山晋桦豹胶轮车制造有限公司 防爆胶轮运输车尾气稀释装置
DE102017200684B4 (de) 2017-01-17 2022-08-04 Ford Global Technologies, Llc Vorrichtung zum Steuern einer Temperatur
WO2019068313A1 (fr) * 2017-10-03 2019-04-11 Volvo Lastvagnar Ab Procédé consistant à refroidir au moins un composant, tel qu'un capteur, disposé à l'intérieur d'un compartiment d'un système de post-traitement des gaz d'échappement d'un véhicule
CN113123740B (zh) * 2019-12-30 2024-09-17 四川宏华石油设备有限公司 一种钻井液冷却系统
JP2023051491A (ja) 2021-09-30 2023-04-11 株式会社クボタ 作業車
EP4361410A1 (fr) * 2022-10-26 2024-05-01 Kubota Corporation Véhicule de travail

Citations (2)

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Publication number Priority date Publication date Assignee Title
US3143293A (en) * 1961-04-13 1964-08-04 Universal Oil Prod Co Variable-area nozzle
WO2008060559A2 (fr) 2006-11-14 2008-05-22 Tenneco Automotive Operating Company, Inc. Dispositif conçu pour abaisser la température de l'échappement du tuyau arrière

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US4227651A (en) * 1979-07-20 1980-10-14 Abe Luis A P Nozzle for use on the exhaust of internal combustion engines
DE3010598C2 (de) * 1980-03-20 1984-05-24 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Durch Umgebungsluft gekühltes Abgasrohr
GB2240364B (en) * 1990-01-27 1994-09-28 S & C Thermofluids Ltd Combustion engines improvements
US6220387B1 (en) * 1999-10-21 2001-04-24 Mathew S. Hoppes Exhaust muffler
US7284364B2 (en) * 2003-09-08 2007-10-23 Northrop Grumman Ship Systems, Inc. Passive exhaust suppressor and method
US7757482B2 (en) * 2007-02-21 2010-07-20 Gm Global Technology Operations, Inc. Variable geometry exhaust cooler
US7793495B2 (en) * 2007-05-18 2010-09-14 International Truck Intellectual Property Company, Llc Engine gas temperature reduction
CN102007275A (zh) * 2008-04-18 2011-04-06 坦尼科汽车营业公司 尾管排气冷却装置
US8341948B2 (en) * 2008-07-01 2013-01-01 GM Global Technology Operations LLC Apparatus and method for cooling an exhaust gas

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143293A (en) * 1961-04-13 1964-08-04 Universal Oil Prod Co Variable-area nozzle
WO2008060559A2 (fr) 2006-11-14 2008-05-22 Tenneco Automotive Operating Company, Inc. Dispositif conçu pour abaisser la température de l'échappement du tuyau arrière

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2730764A1 (fr) * 2011-07-09 2014-05-14 Unicarriers Corporation Structure de joint de tuyau pour dispositif de traitement des gaz d'échappement pour véhicule industriel
EP2730764A4 (fr) * 2011-07-09 2015-02-25 Unicarriers Corp Structure de joint de tuyau pour dispositif de traitement des gaz d'échappement pour véhicule industriel

Also Published As

Publication number Publication date
CN102052134A (zh) 2011-05-11
EP2317093A3 (fr) 2013-04-17
US20110099990A1 (en) 2011-05-05
DE102009046253A1 (de) 2011-05-05
BRPI1013480A2 (pt) 2014-02-04

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