EP2354520A2 - Véhicule automobile doté d'une installation de gaz d'échappement - Google Patents

Véhicule automobile doté d'une installation de gaz d'échappement Download PDF

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Publication number
EP2354520A2
EP2354520A2 EP11000474A EP11000474A EP2354520A2 EP 2354520 A2 EP2354520 A2 EP 2354520A2 EP 11000474 A EP11000474 A EP 11000474A EP 11000474 A EP11000474 A EP 11000474A EP 2354520 A2 EP2354520 A2 EP 2354520A2
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
line
exhaust
condensate
gas recirculation
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Withdrawn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
EP11000474A
Other languages
German (de)
English (en)
Other versions
EP2354520A3 (fr
Inventor
Hubert Vollmer
Uwe Sailer
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP2354520A2 publication Critical patent/EP2354520A2/fr
Publication of EP2354520A3 publication Critical patent/EP2354520A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • 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
    • F02M26/24—Layout, e.g. schematics with two or more coolers
    • 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
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • 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
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • 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
    • F02M26/33—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 controlling the temperature of the recirculated gases
    • 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
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters

Definitions

  • the invention relates to a motor vehicle with an exhaust system according to the preamble of claims 1 and 2.
  • the exhaust gas recirculation can also reduce the specific fuel consumption in part-load operation. Due to the lower oxygen content of the mixture in the internal combustion engine, a throttle valve can remain open in part-load operation, so that back pressure losses at the throttle valve are avoided, which reduce the efficiency of the internal combustion engine.
  • a particularly good effect of the exhaust gas recirculation is achieved when the recirculated exhaust gas is cooled by means of an exhaust gas recirculation cooler, as it increases its density upon cooling of the exhaust gas. Since the combustion of hydrocarbons in addition to CO 2 also considerable amounts of water vapor, it may come to the condensation of the vapor in the cooling of the exhaust gas, whereby liquid water accumulates in the exhaust system.
  • a collecting container in which collects the condensed water.
  • the water can be discharged from the sump to the environment or be returned to the exhaust pipe.
  • An exhaust system with such a collecting container is from the US 4,055,158 known. In such an exhaust system flows in addition to the collected water and a considerable part of the recirculated exhaust gas through the drain line, so that the effect of exhaust gas recirculation is reduced.
  • the present invention thus has for its object to provide a motor vehicle according to the preamble of claims 1 and 2, which allows a particularly simple and effective removal of condensed water from recirculated exhaust gas.
  • the dynamic pressure at both ends of a condensate line for discharging condensed water from an exhaust gas recirculation line is substantially equal.
  • This pressure equality can be achieved by adapting various geometric parameters of the exhaust system, for example by a suitable choice of the flow cross-section of the condensate line in relation to the flow cross-section of the exhaust gas recirculation line or an exhaust pipe with which the condensate line is in communication.
  • the angle under which the condensate line in the exhaust pipe or the exhaust gas recirculation line opens affects the pressure conditions at the ends of the condensate line.
  • the exhaust system of the motor vehicle according to the invention has a closure means which closes the condensate line in a closed position and releases the condensate line in an open position.
  • a closure means can be briefly brought to the discharge of condensate in the open position and closed again after expiration of the condensate. Since the condensate line is open only for short periods in such an exhaust system, exhaust gas losses through the condensate line play no role. Also in this embodiment can be dispensed with complex steam traps or space-consuming collection container.
  • the closure means is designed as a flap. This is a mechanically particularly simple and compact embodiment that can be integrated into existing exhaust systems without significant changes.
  • closure means At the first end of the condensate line.
  • Such an arrangement is particularly streamlined and prevents back pressure losses in the exhaust pipe.
  • a control device is provided, by means of which the closure means at predetermined time intervals and / or when exceeding or falling below a predetermined amount of condensate in the exhaust system between the open and closed positions is movable.
  • the time-dependent control of the closure means is a particularly easy to implement variant, which ensures that condensed water is reliably removed from the exhaust system without additional sensors or the like are necessary. If a particularly reliable removal of the condensate is to be guaranteed, however, the amount of water accumulating in the exhaust gas recirculation line can also be detected and the closure means can be controlled as a function of the amount of water.
  • This embodiment is particularly suitable for exhaust systems with particularly high quality components.
  • connection region between the exhaust gas recirculation line and the condensate line is arranged in the installed position of the exhaust system at the lowest points of the exhaust gas recirculation line in the vehicle vertical direction. Condensed water accumulating in the exhaust gas recirculation line collects at this point solely by gravity and therefore can drain through the condensate line without active assistance.
  • a particularly secure discharge of condensation water can also be realized if this connection region is arranged in a knee of the exhaust gas recirculation line. At the lowest point of this knee, the water can collect without the risk of water drops being introduced into the internal combustion engine or a compressor.
  • This embodiment is particularly suitable if the condensate line is to be provided with a time-dependent controlled closing flap.
  • a connection region between the second end of the condensate line and the exhaust gas line in the flow direction of the exhaust gas is arranged behind a connection region between the exhaust gas recirculation line and the exhaust gas line. Water introduced into the exhaust gas line through the condensate line can safely be discharged through the exhaust line into the environment without the risk that water from the exhaust line is introduced back into the exhaust gas recirculation line.
  • a further closure means is provided, by means of which a partial flow cross-section of the exhaust gas cooler can be closed.
  • the temperature of the recirculated exhaust gas can be adjusted by changing the flow cross section of the exhaust gas cooler. It is particularly advantageous to prevent excessive cooling of the exhaust gas, which would lead to particularly strong condensation of water in the exhaust gas recirculation line.
  • a designated as a whole with 10 exhaust system for a motor vehicle includes an exhaust pipe 12, by means of which exhaust gas can be removed from an internal combustion engine, not shown in the figures of the motor vehicle.
  • an exhaust pipe 12 by means of which exhaust gas can be removed from an internal combustion engine, not shown in the figures of the motor vehicle.
  • a proportion of the exhaust gas is recirculated via an exhaust gas recirculation line 14 to an intake tract of the internal combustion engine.
  • the recycling of the substantially oxygen-free exhaust gas reduces the oxygen content of the combustion air in the internal combustion engine, whereby the combustion temperature is lowered and fewer nitrogen oxides are formed during the combustion.
  • an exhaust gas cooler 16 is provided in the exhaust gas recirculation line 14. This comprises two heat exchangers 18, 20, which are separated from each other by a partition wall 22 and can be flowed through in parallel by exhaust gas.
  • the exhaust system 10 has a condensate line 24, which connects the exhaust gas recirculation line 14 with the exhaust pipe 12.
  • a first end 26 of the condensate line opens into a connection region 28 in the exhaust gas recirculation line 14, which lies in the flow direction of the exhaust gas behind the exhaust gas cooler 16.
  • a second end 30 of the condensate line opens into a connection region 32 in the exhaust pipe 12, which lies in the flow direction of the exhaust gas behind a connection region 34 between the exhaust gas recirculation line 14 and the exhaust pipe 12.
  • connection region 28 lies at the lowest point in the exhaust gas recirculation line 14 in the vehicle vertical direction.
  • condensing water collects in the connection region 28 due to gravity.
  • the end 26 of the condensate line 24 is closed by a flap 35 which is articulated via a hinge 36 to a wall 38 of the exhaust gas recirculation line 14. Only when water accumulates in the region 28 of the exhaust gas recirculation line 14, the flap 35 is opened, so that the water can drain through the condensate line 24. From the condensate line 24, the water passes into the exhaust pipe 12 and is entrained by this flowing through the exhaust gas and released to the environment.
  • the flap 35 can also be opened periodically for short periods, so that no sensors for detecting condensed water are necessary.
  • Fig. 2 shows an alternative embodiment of a generally designated 10 'exhaust system.
  • the same components are provided with the same reference numerals as in the embodiment according to FIG Fig. 1 ,
  • a partial exhaust gas flow is removed from the exhaust pipe 12, cooled in an exhaust gas cooler 16 and returned via an exhaust gas recirculation line 14 to the engine.
  • a condensate line 24 ' is provided, by means of which condensed water from the exhaust gas recirculation line 14 can be discharged into the exhaust pipe 12.
  • the first end 26 of the condensate line 24 ' is connected in a connection region 28 with the exhaust gas recirculation line.
  • the second end 28 'of the condensate line extends here into an inner space 40 of the exhaust pipe 12, wherein an opening 42 of the condensate line 24' is directed opposite to a flow direction of the exhaust gas in the exhaust pipe 21 illustrated by the arrow 44.
  • the exhaust gas flowing through the exhaust pipe 12 generates at the mouth 42 of the condensate line 24 'a dynamic pressure which corresponds approximately to the back pressure in the connection region 28 of the exhaust gas recirculation line 14 with the condensate line 24'. Since there is thus no pressure gradient over the course of the condensate line 24 ', no exhaust gas flows from the exhaust gas recirculation line 14 through the condensate line 24' back into the exhaust pipe 12. A flap for closing the condensate line 24 'can therefore be dispensed with here. Condensed water, however, can still run off into the exhaust pipe 12 solely through the action of gravity from the exhaust gas recirculation line 14 through the condensate line 24 '.
  • the exhaust system 10 'comprises a flap 46, by means of which the heat exchanger 20 can be closed, so that the recirculated exhaust gas flows only through the heat exchanger 18.
  • the flap 46 When the flap 46 is closed, therefore, the cooling capacity of the exhaust gas cooler 16 decreases.
  • the recirculated exhaust gas has a higher temperature after passage of the exhaust gas cooler, whereby the condensation of water from the recirculated exhaust gas is reduced. This can be done at low operating temperatures, for example in partial load operation the internal combustion engine, to avoid the accumulation of water in the exhaust gas recirculation line 14.
  • Such a flap 46 may also in the embodiment according to Fig. 1 Application and is there only for reasons of clarity not shown in the drawing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Silencers (AREA)
EP11000474.4A 2010-01-27 2011-01-21 Véhicule automobile doté d'une installation de gaz d'échappement Withdrawn EP2354520A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010005784A DE102010005784A1 (de) 2010-01-27 2010-01-27 Kraftwagen mit einer Abgasanlage

Publications (2)

Publication Number Publication Date
EP2354520A2 true EP2354520A2 (fr) 2011-08-10
EP2354520A3 EP2354520A3 (fr) 2014-07-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11000474.4A Withdrawn EP2354520A3 (fr) 2010-01-27 2011-01-21 Véhicule automobile doté d'une installation de gaz d'échappement

Country Status (3)

Country Link
US (1) US8733329B2 (fr)
EP (1) EP2354520A3 (fr)
DE (1) DE102010005784A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781730A1 (fr) * 2013-03-19 2014-09-24 Borgwarner Inc. Dispositif compact pour gestion de gaz d'échappement dans un système EGR

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Publication number Priority date Publication date Assignee Title
WO2013055363A1 (fr) * 2011-10-14 2013-04-18 International Engine Intellectual Property Company, Llc Mécanisme de purge de condensat de recyclage de gaz d'échappement et procédé correspondant
KR101283889B1 (ko) * 2011-10-19 2013-07-08 기아자동차주식회사 차량용 인터쿨러
DE102012004368A1 (de) * 2012-03-02 2013-09-05 Daimler Ag Brennkraftmaschine, insbesondere ein Dieselmotor oder ein Ottomotor
JP6040771B2 (ja) * 2012-12-28 2016-12-07 スズキ株式会社 車両用エンジンの排気ガス還流装置
DE102013203963A1 (de) * 2013-03-08 2014-09-11 Mahle International Gmbh Kühler
US9624879B2 (en) * 2013-06-28 2017-04-18 Toyota Jidosha Kabushiki Kaisha Condensed water treatment device for internal combustion engine
JP5862620B2 (ja) * 2013-07-26 2016-02-16 株式会社デンソー 内燃機関の吸気装置
CN107013377B (zh) * 2016-01-28 2020-12-29 福特环球技术公司 低压egr阀
JP2018066277A (ja) * 2016-10-17 2018-04-26 ヤマハ発動機株式会社 船外機
US10119498B2 (en) 2017-02-01 2018-11-06 GM Global Technology Operations LLC Enhanced long route EGR cooler arrangement with bypass
JP6834741B2 (ja) * 2017-04-20 2021-02-24 いすゞ自動車株式会社 排気再循環装置および内燃機関
JP7087874B2 (ja) * 2018-09-21 2022-06-21 いすゞ自動車株式会社 凝縮水排出機構及び凝縮水排出機構のガスケット
DE102021101453A1 (de) 2021-01-25 2022-07-28 Bayerische Motoren Werke Aktiengesellschaft Abgasanlage für ein Kraftfahrzeug, Verfahren zum Betreiben einer Abgasanlage und Kraftfahrzeug

Citations (2)

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US4055158A (en) 1974-04-08 1977-10-25 Ethyl Corporation Exhaust recirculation
EP1548269A1 (fr) 2003-12-22 2005-06-29 Iveco S.p.A. Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé

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US3831377A (en) * 1972-07-24 1974-08-27 A Morin Method of and apparatus for reducing pollution caused by exhaust gases of an internal combustion engine
US6301888B1 (en) * 1999-07-22 2001-10-16 The United States Of America As Represented By The Administrator Of The Environmental Protection Agency Low emission, diesel-cycle engine
US6367256B1 (en) * 2001-03-26 2002-04-09 Detroit Diesel Corporation Exhaust gas recirculation with condensation control
US7340889B2 (en) * 2002-02-25 2008-03-11 Pedro Riquelme Method and apparatus for treating exhaust gases from combustion sources
DE102005050133A1 (de) * 2004-10-25 2006-04-27 Behr Gmbh & Co. Kg Turboladeranordnung und Verfahren zum Betreiben eines Turboladers
US7302795B2 (en) * 2005-07-11 2007-12-04 Jan Vetrovec Internal combustion engine/water source system
DE102006037640B4 (de) * 2006-08-10 2020-08-27 Mahle International Gmbh Wärmetauscher für ein Kraftfahrzeug
US7451750B1 (en) * 2007-06-29 2008-11-18 Caterpillar Inc. Condensation reduction device for an EGR equipped system
WO2009081226A1 (fr) * 2007-12-20 2009-07-02 Renault Trucks Agencement de moteur à combustion interne avec système de vidange egr
US20090241515A1 (en) * 2008-03-26 2009-10-01 Denso International America, Inc. Exhaust condensation separator
DE102008049625A1 (de) * 2008-09-30 2010-04-08 Mann + Hummel Gmbh Vorrichtung und Verfahren zur Neutralisation von saurem Kondensat in einem Kraftfahrzeug
US8230843B2 (en) * 2009-07-30 2012-07-31 Ford Global Technologies, Llc Cooler bypass to reduce condensate in a low-pressure EGR system
US8418461B2 (en) * 2009-10-06 2013-04-16 International Engine Intellectual Property Company, Llc System and method for condensate removal from EGR system

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US4055158A (en) 1974-04-08 1977-10-25 Ethyl Corporation Exhaust recirculation
EP1548269A1 (fr) 2003-12-22 2005-06-29 Iveco S.p.A. Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2781730A1 (fr) * 2013-03-19 2014-09-24 Borgwarner Inc. Dispositif compact pour gestion de gaz d'échappement dans un système EGR
WO2014147064A1 (fr) * 2013-03-19 2014-09-25 Borgwarner Inc. Dispositif compact pour le traitement de gaz d'échappement dans un système rge
US9759118B2 (en) 2013-03-19 2017-09-12 Borgwarner Emissions Systems Spain, S.L.U. Compact device for exhaust gas management in an EGR system

Also Published As

Publication number Publication date
US20110225959A1 (en) 2011-09-22
DE102010005784A1 (de) 2011-07-28
US8733329B2 (en) 2014-05-27
EP2354520A3 (fr) 2014-07-09

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