EP1548269B1 - Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé - Google Patents
Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé Download PDFInfo
- Publication number
- EP1548269B1 EP1548269B1 EP04106791A EP04106791A EP1548269B1 EP 1548269 B1 EP1548269 B1 EP 1548269B1 EP 04106791 A EP04106791 A EP 04106791A EP 04106791 A EP04106791 A EP 04106791A EP 1548269 B1 EP1548269 B1 EP 1548269B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- line
- cooler
- exhaust
- exhaust gases
- 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.)
- Active
Links
- 239000007789 gas Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003134 recirculating effect Effects 0.000 title claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 title abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 239000012809 cooling fluid Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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
- F02M26/35—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
-
- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
-
- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
- F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
-
- 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
- F02M26/32—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
- F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
- F02M26/44—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which a main EGR passage is branched into multiple passages
Definitions
- the present invention relates to a method for recirculating the exhaust gases in a turbocharged diesel engine apparatus for use in an industrial vehicle and an engine apparatus comprising a diesel engine.
- Exhaust gas recirculation is common practice in the field of internal combustion engines, especially in diesel engines.
- EGR exhaust gas recirculation
- a portion of the exhaust gases from the engine are recirculated upstream of the engine and reintroduced into the combustion chambers with the intake air. This permits to lower the combustion temperature and leads to a reduced formation of nitrogen oxides, one of the main pollutants in internal combustion engine emissions.
- US 4 055 158 describes a spark ignited engine where exhaust gas is recirculated, and recirculated gases are cooled, and a condensate trap is foreseen after the cooler.
- US 6 301 887 describes an EGR system applied on the low pressure side of compressor and turbine in a turbocharged engine. Condensation and condensate removal are foreseen in an intercooler placed on the intake line after the compressor.
- US6367256 discloses a method for EGR having the features of the precharacterising portion of claim 1 and discloses an engine with means for EGR.
- the invention also relates to an engine apparatus comprising a diesel engine, an air intake line to said engine provided with a compressor, an exhaust gas line from said engine provided with a turbine, an exhaust gas recirculation line connects said exhaust line between said engine and said turbine with said intake line between said compressor and said engine and suitable for conveying gas from said exhaust line to said intake line, comprising a cooler on said recirculation line, provided with devices for separating the condensate, said cooler being connected to a circuit for the engine cooling fluid in such a way that the fluid coming from a radiator placed on said circuit can first be supplied to said cooler and then to the engine characterized in that there is provided a particulate trap upstream of said cooling,
- figure 1 illustrates the layout of an engine apparatus, which may be the engine apparatus of an industrial vehicle according to the invention; the engine apparatus comprises an internal combustion engine 1, generally a diesel engine, an air intake line 2 to the engine, that takes in air from the outside, and the exhaust gas line 3 that may comprise a manifold 4.
- the engine apparatus comprises an internal combustion engine 1, generally a diesel engine, an air intake line 2 to the engine, that takes in air from the outside, and the exhaust gas line 3 that may comprise a manifold 4.
- a compression unit 5 comprising the turbocharger compressor 6 on the intake line, driven by the turbine 7 on the exhaust gas line.
- turbocharged engine there are usually one or more coolers like cooler 9 on the intake line.
- the recirculation line 8 draws a portion of the exhaust gases coming from the engine (this portion may be for example up to 50% of the total exhaust gases) and reintroduces said portion into the intake line.
- the exhaust gases may be conveyed spontaneously if the pressure of the exhaust gases leaving the engine 1 is higher than the intake pressure. If this condition is not maintained continuously there is generally a check valve 10 (for example a reed valve), which may also be foreseen in any case. If, as it often happens, the engine intake pressure is higher than the exhaust pressure, or if deemed necessary, in order to increase or control the rate of recirculation, specific circulation means 11, such as a compressor, may be included. Said means may be driven by an electric motor or in any other appropriate manner.
- a check valve 10 for example a reed valve
- cooler 12 On the line 8 there is an appropriate type of cooler 12, for example having all the parts that must come into contact with gases and condensate being corrosion-proof; for example, such parts may be coated with an appropriate type of material, such as Teflon.
- the engine apparatus preferably includes devices for separating the condensate.
- Said devices may be an integral part of the cooler 12 and of the inertial type.
- the cooler and separator may be of conventional type.
- a cooler may be used in which the recirculated gases flow through the shell side and a cooling fluid through the tube side.
- Condensate separation may be achieved by the loss of speed due to an increased cross-section of the passage, the liquid collecting at the shellbottom.
- baffles to divert the flow of gas in order to facilitate separation, and the system may comprise a specific separation section before the gas leaves the shell, with baffle or centrifugal separators.
- the recirculated gas may also flow through the tube side into a specific separation chamber.
- the gas flowing along the recirculation line is cooled to a temperature at which separation of condensate can be achieved.
- a temperature at which separation of condensate can be achieved may be less than 95°C and preferably not more than 70°C. Cooling may be effected by transferring the heat to an appropriate fluid; for example, engine cooling water coming from the radiator may be supplied to the cooler 12. According to a possible embodiment of the invention, the water from the radiator is supplied first to the cooler 12 and then to the engine 1, in order to ensure adequate cooling of the recirculated gases.
- the apparatus comprises an engine cooling circuit comprising a radiator to cool a fluid (preferably water) contained in said circuit and circulating through the cooler 12.
- the condensate may be discharged from the cooler in an appropriate manner.
- the condensate flow rate can be controlled by means of an appropriate valve or by using a conventional condensate discharger 14 installed in an appropriate position on the bottom of the cooler or on the exhaust line.
- the condensate may be discharged at regular intervals or according to the amount of condensate that has been collected.
- the discharge system may also consist of a simple and appropriately sized orifice.
- the particulate is preferably removed from the recirculated gas upstream of the cooler, for example by means of a trap 15 on the line 8.
- the trap 15 is preferably of a type that is capable of withstanding high temperatures, such as a metal trap, for example.
- the method according to this invention allows to reduce the content of some components (that are usually a product of combustion) which are found in recirculating gases and are potentially harmful for the engine and other parts (for example sulphuric and nitric acid).
- the low recirculation temperature is advantageous because it enables the temperature inside the combustion chambers to be lowered, which leads to a reduced formation of pollutants (such as nitrogen oxides), and enhances combustion chamber filling efficiency and thus engine performance.
Claims (2)
- Procédé pour remettre en circulation les gaz d'échappement jusqu'à un moteur diesel à turbocompresseur comportant une ligne d'admission d'air munie d'un compresseur et une ligne de gaz d'échappement munie d'une turbine, ledit procédé comportant les étapes suivantes consistant à :a) extraire une partie des gaz d'échappement provenant du moteur en un point sur la ligne d'échappement situé entre le moteur et la turbine,b) refroidir la totalité de ladite partie par transfert de chaleur au fluide de refroidissement du moteur dans un refroidisseur alimenté avec le fluide de refroidissement du moteur de manière à entraîner une condensation, ledit fluide provenant d'un radiateur et étant d'abord acheminé jusqu'audit refroidisseur puis jusqu'au moteur,c) séparer le condensat de ladite partie,d) réintroduire ladite partie dans le moteur dans la ligne d'admission en un point situé entre le compresseur et le moteur,caractérisé en ce que sont prévues l'étape consistant à retirer la matière particulaire de ladite partie de gaz d'échappement avant l'étape b) et en ce que le refroidissement de ladite partie de gaz d'échappement est effectué en dessous de 70°C.
- Dispositif moteur comportant un moteur diesel (1), une ligne d'admission d'air (2) jusqu'audit moteur munie d'un compresseur (6), une ligne de gaz d'échappement (3) provenant dudit moteur munie d'une turbine (7), une ligne de recirculation de gaz d'échappement (8) reliant ladite ligne d'échappement entre ledit moteur et ladite turbine à ladite ligne d'admission entre ledit compresseur et ledit moteur et adaptée pour acheminer du gaz provenant de ladite ligne d'échappement jusqu'à ladite ligne d'admission, comportant un refroidisseur (12) sur ladite ligne de recirculation, munie de dispositifs pour séparer le condensat, ledit refroidisseur étant relié à un circuit pour le fluide de refroidissement du moteur de manière à ce que le fluide provenant d'un radiateur placé sur ledit circuit puisse d'abord être acheminé jusqu'au refroidisseur puis jusqu'au moteur, caractérisé en ce qu'un piège à particules (15) est agencé en amont dudit refroidisseur.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20032554 | 2003-12-22 | ||
IT002554A ITMI20032554A1 (it) | 2003-12-22 | 2003-12-22 | Metodo di ricircolo dei gas di scarico in impianto motore a combustione interne e impianto motore a combustione interna |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1548269A1 EP1548269A1 (fr) | 2005-06-29 |
EP1548269B1 true EP1548269B1 (fr) | 2009-12-09 |
Family
ID=34531920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04106791A Active EP1548269B1 (fr) | 2003-12-22 | 2004-12-21 | Procédé de recirculation des gaz d'échappement dans un moteur à combustion interne et moteur à combustion interne mettant en oeuvre ce procédé |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1548269B1 (fr) |
AT (1) | ATE451547T1 (fr) |
DE (1) | DE602004024494D1 (fr) |
ES (1) | ES2337464T3 (fr) |
IT (1) | ITMI20032554A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1825130A1 (fr) * | 2004-10-25 | 2007-08-29 | Behr GmbH & Co. KG | Condensateur d'un systeme de turbocompresseur et procede d'utilisation d'un tel systeme |
DE102005023958A1 (de) * | 2005-05-20 | 2006-11-23 | Behr Gmbh & Co. Kg | Turboladeranordnung und Verfahren zum Betreiben eines Turboladers |
FR2893677B1 (fr) * | 2005-11-23 | 2011-04-29 | Renault Sas | Dispositif de recirculation des gaz brules et refroidisseur d'air de suralimentation adapte pour un tel dispositif |
US8307647B2 (en) | 2007-12-20 | 2012-11-13 | Renault Trucks | Internal combustion engine arrangement with EGR drain system |
US8015809B2 (en) * | 2008-02-14 | 2011-09-13 | Dresser, Inc. | Recirculation of exhaust gas condensate |
EP2161438B1 (fr) | 2008-09-03 | 2015-01-21 | Behr GmbH & Co. KG | Système de récirculation de gaz d'échappement d'un moteur à combustion interne et procédé de récirculation de gaz d'échappement d'un moteur à combustion interne |
US8418461B2 (en) * | 2009-10-06 | 2013-04-16 | International Engine Intellectual Property Company, Llc | System and method for condensate removal from EGR system |
EP2330287B1 (fr) * | 2009-12-04 | 2014-02-26 | Caterpillar Motoren GmbH & Co. KG | Procédé et système de recirculation des gaz d'échappement |
DE102010005784A1 (de) | 2010-01-27 | 2011-07-28 | Audi Ag, 85057 | Kraftwagen mit einer Abgasanlage |
FR2962164B1 (fr) * | 2010-06-30 | 2012-12-07 | Valeo Systemes Thermiques | Dispositif de recirculation de gaz d'echappement d'un moteur de vehicule automobile |
DE102010041982A1 (de) * | 2010-10-05 | 2012-04-05 | Mahle International Gmbh | Abgasrückführfilter, Brennkraftmaschine |
DE102011087256A1 (de) * | 2011-11-28 | 2013-05-29 | Behr Gmbh & Co. Kg | Brennkraftmaschine mit einer Anordnung zur Rückführung von Abgas und Zuführung von gekühlter Ladeluft |
US20160305374A1 (en) * | 2015-04-14 | 2016-10-20 | General Electric Company | Method and systems for managing condensate |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6367256B1 (en) * | 2001-03-26 | 2002-04-09 | Detroit Diesel Corporation | Exhaust gas recirculation with condensation control |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4055158A (en) | 1974-04-08 | 1977-10-25 | Ethyl Corporation | Exhaust recirculation |
US6003315A (en) * | 1997-03-31 | 1999-12-21 | Caterpillar Inc. | Exhaust gas recirculation system for 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 |
US6301887B1 (en) | 2000-05-26 | 2001-10-16 | Engelhard Corporation | Low pressure EGR system for diesel engines |
-
2003
- 2003-12-22 IT IT002554A patent/ITMI20032554A1/it unknown
-
2004
- 2004-12-21 ES ES04106791T patent/ES2337464T3/es active Active
- 2004-12-21 EP EP04106791A patent/EP1548269B1/fr active Active
- 2004-12-21 DE DE602004024494T patent/DE602004024494D1/de active Active
- 2004-12-21 AT AT04106791T patent/ATE451547T1/de not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6367256B1 (en) * | 2001-03-26 | 2002-04-09 | Detroit Diesel Corporation | Exhaust gas recirculation with condensation control |
Also Published As
Publication number | Publication date |
---|---|
ES2337464T3 (es) | 2010-04-26 |
ITMI20032554A1 (it) | 2005-06-23 |
DE602004024494D1 (de) | 2010-01-21 |
ATE451547T1 (de) | 2009-12-15 |
EP1548269A1 (fr) | 2005-06-29 |
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