DE102008061399A1 - Internal combustion engine with two exhaust gas turbochargers connected in series - Google Patents
Internal combustion engine with two exhaust gas turbochargers connected in series Download PDFInfo
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- DE102008061399A1 DE102008061399A1 DE102008061399A DE102008061399A DE102008061399A1 DE 102008061399 A1 DE102008061399 A1 DE 102008061399A1 DE 102008061399 A DE102008061399 A DE 102008061399A DE 102008061399 A DE102008061399 A DE 102008061399A DE 102008061399 A1 DE102008061399 A1 DE 102008061399A1
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- exhaust gas
- internal combustion
- combustion engine
- exhaust
- intake tract
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 88
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 36
- 239000000295 fuel oil Substances 0.000 abstract description 8
- 239000003570 air Substances 0.000 description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000002000 scavenging effect Effects 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
-
- 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
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
-
- 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
- F02B29/0412—Multiple heat exchangers arranged in parallel or in series
-
- 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
- F02B37/004—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust drives arranged in series
-
- 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
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
-
- 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
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/0221—Details of the water supply system, e.g. pumps or arrangement of valves
- F02M25/0222—Water recovery or storage
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/025—Adding water
- F02M25/028—Adding water into the charge intakes
-
- 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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/36—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for adding fluids other than exhaust gas to the recirculation passage; with reformers
-
- 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
- F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Supercharger (AREA)
Abstract
Eine Brennkraftmaschine (10) hat zwei in Reihe geschalteten Abgasturbolader (22, 26), die jeweils eine Abgasturbine (34, 36) in einer Abgasleitung (32) und einen Verdichter (20, 24) in einem Ansaugtrakt (18) umfassen. Zur Reduzierung der Stickoxidemissionen sind eine Abgasrückführleitung (40), die stromauf der Abgasturbine (36) des motornahen Abgasturboladers (26) von der Abgasleitung (32) abzweigt und zwischen den Verdichtern (20, 24) der beiden Abgasturbolader (22, 26) in den Ansaugtrakt (18) mündet, und eine Vorrichtung (29, 44) zum Kühlen und Befeuchten des über die Abgasrückführleitung (40) in den Ansaugtrakt (18) rückgeführten Abgasstroms vorgesehen. Dieses System ist insbesondere bei mit Schweröl betriebenen Großdieselmotoren in vorteilhafter Weise einsetzbar.An internal combustion engine (10) has two exhaust gas turbochargers (22, 26) connected in series, each comprising an exhaust gas turbine (34, 36) in an exhaust pipe (32) and a compressor (20, 24) in an intake tract (18). To reduce the nitrogen oxide emissions are an exhaust gas recirculation line (40) upstream of the exhaust gas turbine (36) of the exhaust gas turbocharger (26) from the exhaust pipe (32) branches off and between the compressors (20, 24) of the two exhaust gas turbocharger (22, 26) in the Intake tract (18) opens, and a device (29, 44) for cooling and moistening of the exhaust gas recirculation line (40) in the intake tract (18) recirculated exhaust gas stream provided. This system can be used advantageously in particular in large diesel engines operated with heavy oil.
Description
Die Erfindung betrifft eine Brennkraftmaschine mit zwei in Reihe geschalteten Abgasturboladern und einer Abgasrückführung.The The invention relates to an internal combustion engine with two connected in series Exhaust gas turbochargers and exhaust gas recirculation.
Die
gekühlte Abgasrückführung (AGR) ist eine
sehr effektive Methode zur Reduzierung der Stickoxidemissionen.
Sie ist bei allen Dieselmotoren von Kraftfahrzeugen Stand der Technik
(siehe zum Beispiel die
Bei schnell laufenden Kraftfahrzeugmotoren wird die AGR im Fahrzyklus hauptsächlich bei geringen Leistungen eingesetzt und arbeitet mit negativen Spülgefällen, bei denen der Abgasdruck nach den Zylindern der Brennkraftmaschine größer als der Ladeluftdruck vor den Zylindern der Brennkraftmaschine ist. Bei Großdieselmotoren sind hohe Leistungen im Betriebszyklus stark gewichtet. Bei hoher Leistung wird die AGR jedoch durch die geforderten niedrigen Bauteiltemperaturen bei Schwerölmotoren und das positive Spülgefälle an der Brennkraftmaschine erschwert.at fast running automotive engines, the EGR is in the driving cycle mainly used at low power and works with negative purge rates, where the exhaust pressure bigger after the cylinders of the internal combustion engine as the charge air pressure in front of the cylinders of the internal combustion engine. In large diesel engines are high performance in the operating cycle heavily weighted. At high power, however, the EGR will be replaced by the required low component temperatures in heavy oil engines and the positive purge gradient on the internal combustion engine difficult.
Ferner
besteht bei mit Schweröl betriebenen Großdieselmotoren
das Problem, dass bei der Verbrennung des Schweröls Rückstände
entstehen, die sich nach der Rückführung des Abgasstroms
in den verdichteten Ladeluftstrom an den die Ladeluft führenden
Bauteilen ablagern können. Aus diesem Grund schlägt
zum Beispiel die
Mit Hilfe der Abgasrückführung wird das Sauerstoffangebot für die Verbrennung in den Zylindern der Brennkraftmaschine gesenkt, was letztlich zur Reduzierung der Stickoxidemissionen führt. So können die Stickoxidemissionen bei einer Sauerstoffkonzentration in der Ladeluft von etwa 22,5% (zum Vergleich: Luft besitzt eine Sauerstoffkonzentration von etwa 23,2%) um bis zu etwa 30% reduziert werden.With Help of exhaust gas recirculation becomes the supply of oxygen for combustion in the cylinders of the internal combustion engine lowered, which ultimately leads to the reduction of nitrogen oxide emissions. Thus, the nitrogen oxide emissions at an oxygen concentration in the charge air of about 22.5% (for comparison: air has one Oxygen concentration of about 23.2%) by up to about 30% become.
Entscheidend
für die Reduzierung der Stickoxidemissionen ist das Senken
der Verbrennungstemperaturen. Neben der oben genannten gekühlten Abgasrückführung
kann dies zum Beispiel auch durch die Befeuchtung der Ladeluft geschehen,
wie zum Beispiel in der
Aufgabe der Erfindung ist es, eine verbesserte Brennkraftmaschine mit zweistufiger Aufladung und reduzierten Stickoxidemissionen zu schaffen.task The invention is an improved internal combustion engine with two stages Charge and reduced nitrogen oxide emissions.
Diese Aufgabe wird durch eine Brennkraftmaschine mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.These Task is by an internal combustion engine with the characteristics of Claim 1 solved. Advantageous embodiments and developments The invention are defined in the dependent claims specified.
Die Brennkraftmaschine der Erfindung hat zwei in Reihe geschaltete Abgasturbolader, die jeweils eine Abgasturbine in einer Abgasleitung und einen Verdichter in einem Ansaugtrakt umfassen. Weiter sind eine Abgasrückführleitung vorgesehen, die stromauf der Abgasturbine des motornahen Abgasturboladers von der Abgasleitung abzweigt und zwischen den Verdichtern der beiden Abgasturbolader in den Ansaugtrakt mündet, und eine Vorrichtung zum Kühlen und Befeuchten des über die Abgasrückführleitung in den Ansaugtrakt rückgeführten Abgasstroms vorgesehen.The Internal combustion engine of the invention has two exhaust gas turbochargers connected in series, each an exhaust gas turbine in an exhaust pipe and a compressor in an intake tract. Next are an exhaust gas recirculation line provided upstream of the exhaust gas turbine of the exhaust gas turbocharger close to the engine branches off from the exhaust pipe and between the compressors of the two Exhaust gas turbocharger opens into the intake tract, and a device for cooling and humidifying the via the exhaust gas recirculation line provided in the intake tract recirculated exhaust gas stream.
Bei der erfindungsgemäßen Brennkraftmaschine mit zweistufiger Aufladung sind eine Abgasrückführleitung sowie eine Vorrichtung zum Kühlen und Befeuchten des über die Abgasrückführleitung in den Ansaugtrakt rückgeführten Abgasstroms vorgesehen. Durch diese Konstruktion werden die Verbrennungstemperaturen in den Zylindern der Brennkraftmaschine durch zweierlei Maßnahmen gesenkt: einerseits durch die Reduzierung des Sauerstoffangebots aufgrund des in den Ansaugtrakt rückgeführten gekühlten Abgasstroms und andererseits durch das Anfeuchten der Verbrennungsluft aufgrund des Befeuchtens des rückgeführten Abgasstroms. Als Ergebnis der auf diese Weise deutlich reduzierten Verbrennungstemperaturen können die Stickoxidemissionen wesentlich reduziert werden.at the internal combustion engine according to the invention with two-stage Charging is an exhaust gas recirculation pipe as well a device for cooling and humidifying the over recirculated the exhaust gas recirculation line in the intake Provided exhaust stream. By this construction, the combustion temperatures in the cylinders of the internal combustion engine by two measures lowered: on the one hand by reducing the supply of oxygen due to the recirculated into the intake tract cooled exhaust gas flow and on the other hand by moistening the combustion air due to the humidification of the recirculated Exhaust gas flow. As a result of this way significantly reduced Combustion temperatures can be the nitrogen oxide emissions be significantly reduced.
Weiter mündet die Abgasrückführleitung zwischen den beiden Verdichtern der Abgasturbolader in den Ansaugtrakt, sodass die Ladeluft zusammen mit dem rückgeführten Abgasstrom im Verdichter des motornahen Abgasturboladers nochmals verdichtet wird. Auf diese Weise kann auch bei Großdieselmotoren mit sehr guten Aufladesystemwirkungsgraden das große positive Spüldruckgefälle der Brennkraftmaschine weiter genutzt werden.Further opens the exhaust gas recirculation line between the two compressors of the exhaust gas turbocharger in the intake tract, so the charge air together with the recirculated exhaust gas flow is compressed again in the compressor of the exhaust gas turbocharger close to the engine. In this way, even with large diesel engines with very good charging system efficiencies the large positive flush pressure drop the internal combustion engine can be used.
In einer Ausführungsform der Erfindung weist die Vorrichtung zum Kühlen und Befeuchten des rückgeführten Abgasstroms einen Abgaswäscher auf, der in der Abgasrückführleitung angeordnet ist. Der eingesetzte Abgaswäscher entzieht dem rückgeführten Abgasstrom nahezu die gesamten Schwefel- und Metalloxide sowie einen Großteil der Aschen aus dem verbrannten Schmieröl und Kraftstoff. Damit können die Korrosionsgefahr und die Verschmutzungsneigung im Ansaugtrakt durch die rückgeführten Abgase verringert werden. Der Abgaswäscher sorgt gleichzeitig für eine Kühlung des rückgeführten Abgasstroms, sodass auf einen AGR-Kühler, der üblicherweise verschmutzungsempfindlich ist, in der Abgasrückführleitung verzichtet werden kann. Außerdem bewirkt der Abgaswäscher ein Anfeuchten des rückgeführten Abgasstroms, was sich positiv auf die Stickoxidemissionen der Brennkraftmaschine auswirkt.In one embodiment of the invention For example, the device for cooling and humidifying the recirculated exhaust gas flow has an exhaust gas scrubber which is arranged in the exhaust gas recirculation line. The exhaust gas scrubber used removes almost all the sulfur and metal oxides as well as the majority of the ashes from the burnt lubricating oil and fuel from the recirculated exhaust gas flow. Thus, the risk of corrosion and the tendency to fouling in the intake can be reduced by the recirculated exhaust gases. At the same time, the exhaust gas scrubber ensures cooling of the recirculated exhaust gas flow, so that it is possible to dispense with an EGR cooler, which is usually susceptible to contamination, in the exhaust gas recirculation line. In addition, the exhaust gas scrubber causes moistening of the recirculated exhaust gas flow, which has a positive effect on the nitrogen oxide emissions of the internal combustion engine.
Alternativ oder zusätzlich weist diese Vorrichtung zum Kühlen und Befeuchten des rückgeführten Abgasstroms eine Befeuchtungsvorrichtung auf, die in dem Ansaugtrakt angeordnet ist. In diesem Fall mündet die Abgasrückführleitung vorzugsweise in diese Befeuchtungsvorrichtung. Außerdem ist diese Befeuchtungsvorrichtung zum Beispiel eine Befeuchtungsvorrichtung nach dem HAM-(Humid Air Motor) oder dem SAM-(Scavenging Air Moistening)Verfahren. Die Befeuchtungsvorrichtung bewirkt neben dem Anfeuchten des Ladeluftstroms einschließlich des rückgeführten Abgasstroms auch eine Kühlung der beiden Ströme sowie eine Entfernung der Schwefeloxide aus dem rückgeführten Abgas.alternative or in addition, this device has for cooling and humidifying the recirculated exhaust gas flow Moistening device, which is arranged in the intake tract. In this case, the exhaust gas recirculation line opens preferably in this moistening device. Furthermore For example, this humidification device is a humidification device according to the HAM (Humid Air Motor) or the SAM (Scavenging Air Moistening) method. The moistening device causes in addition to moistening the charge air flow including the recirculated exhaust gas flow also a cooling of the two streams and a Removal of sulfur oxides from the recirculated Exhaust.
In einer weiteren Ausgestaltung der Erfindung ist die Abgasturbine des motornahen Abgasturboladers als eine Hochdruckturbine mit variablen Querschnitten ausgebildet.In Another embodiment of the invention is the exhaust gas turbine the near-engine exhaust gas turbocharger as a high-pressure turbine with variable cross-sections educated.
In einer noch weiteren Ausgestaltung der Erfindung ist eine Turbolader-Bypassleitung vorgesehen, die stromauf der Abgasturbine des motornahen Abgasturboladers von der Abgasleitung abzweigt und zwischen den Abgasturbinen der beiden Abgasturbolader wieder in die Abgasleitung mündet.In A still further embodiment of the invention is a turbocharger bypass line provided upstream of the exhaust gas turbine of the exhaust gas turbocharger close to the engine branches off from the exhaust pipe and between the exhaust gas turbine of the both exhaust gas turbochargers back into the exhaust pipe.
Die vorliegende Erfindung ist insbesondere bei mit Schweröl betriebenen Großdieselmotoren in vorteilhafter Weise anwendbar.The The present invention is particularly useful with heavy oil operated large diesel engines advantageously applicable.
Obige sowie weitere Merkmale und Vorteile der Erfindung werden aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele anhand der beiliegenden Zeichnungen besser verständlich. Darin zeigen:Above and other features and advantages of the invention will become apparent from the following description of preferred embodiments better understood with reference to the accompanying drawings. Show:
Bezug
nehmend auf
Die
Brennkraftmaschine
Im
Ansaugtrakt
Die
Abgase werden von der Abgassammelleitung
Die
Hochdruckturbine
Wie
in
In
der Abgasrückführleitung
In
dem Abgaswäscher
Auch
ein Großteil der Partikel wird dem Abgas im Abgaswäscher
Der
Abgasdruck an der Stelle B der Abgasleitung
Der
zweite Verdichter
Bezug
nehmend auf
Die
Brennkraftmaschine des zweiten Ausführungsbeispiels unterscheidet
sich von der in
In
einer Variante dieser Ausführungsform kann anstelle der
zweiten Befeuchtungsvorrichtung
Wie
in
Zusätzlich
zu der Befeuchtungsvorrichtung
Die übrigen
Komponenten, Merkmale und Vorteile dieses Ausführungsbeispiels
entsprechen jenen des ersten Ausführungsbeispiels von
- 1010
- BrennkraftmaschineInternal combustion engine
- 1212
- Zylinderreihecylinder bank
- 1414
- LadeluftsammelleitungCharge-air manifold
- 1616
- AbgassammelleitungExhaust manifold
- 1818
- Ansaugtraktintake system
- 2020
-
Verdichter
von
22 Compressor of22 - 2222
- motorferner Abgasturboladermotor further turbocharger
- 2424
-
Verdichter
von
26 Compressor of26 - 2626
- motornaher Abgasturboladerclose to the motor turbocharger
- 2828
- erster Ladeluftkühlerfirst Intercooler
- 2929
- erste Befeuchtungsvorrichtungfirst humidifying
- 3030
- zweiter Ladeluftkühlersecond Intercooler
- 3131
- zweite Befeuchtungsvorrichtungsecond humidifying
- 3232
- Abgasleitungexhaust pipe
- 3434
-
Abgasturbine
von
22 Exhaust gas turbine of22 - 3636
-
Abgasturbine
von
26 Exhaust gas turbine of26 - 3838
- Bypassleitungbypass line
- 3939
- Bypassventilbypass valve
- 4040
- Abgasrückführleitung (AGR)Exhaust gas recirculation line (AGR)
- 4242
- AGR-VentilAGR valve
- 4444
- Abgaswäscherexhaust gas scrubber
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 102004009794 A1 [0002] - DE 102004009794 A1 [0002]
- - DE 102006048269 A1 [0004] DE 102006048269 A1 [0004]
- - EP 1386069 B1 [0006] - EP 1386069 B1 [0006]
Claims (8)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008061399A DE102008061399A1 (en) | 2008-12-10 | 2008-12-10 | Internal combustion engine with two exhaust gas turbochargers connected in series |
KR1020090075181A KR20100067030A (en) | 2008-12-10 | 2009-08-14 | Internal combustion engine with two exhaust gas turbocharger connected in series |
JP2009190870A JP2010138892A (en) | 2008-12-10 | 2009-08-20 | Internal combustion engine equipped with two exhaust turbochargers coupled in series together |
FI20096087A FI123593B (en) | 2008-12-10 | 2009-10-22 | Internal engine with two turbocharger connected in series |
CN200910260812A CN101749148A (en) | 2008-12-10 | 2009-12-10 | Internal combustion engine with two exhaust gas turbochargers connected in series |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008061399A DE102008061399A1 (en) | 2008-12-10 | 2008-12-10 | Internal combustion engine with two exhaust gas turbochargers connected in series |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008061399A1 true DE102008061399A1 (en) | 2010-06-17 |
Family
ID=41263502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008061399A Withdrawn DE102008061399A1 (en) | 2008-12-10 | 2008-12-10 | Internal combustion engine with two exhaust gas turbochargers connected in series |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2010138892A (en) |
KR (1) | KR20100067030A (en) |
CN (1) | CN101749148A (en) |
DE (1) | DE102008061399A1 (en) |
FI (1) | FI123593B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011141631A1 (en) * | 2010-05-12 | 2011-11-17 | Wärtsilä Finland Oy | Arrangement and method for exhaust gas recirculation and turbocharging |
DE102012209286A1 (en) | 2012-06-01 | 2013-12-05 | Man Diesel & Turbo Se | Internal combustion engine with exhaust charging and exhaust gas recirculation |
CN104074636A (en) * | 2013-12-23 | 2014-10-01 | 哈尔滨工程大学 | Diesel engine EGR (Exhaust Gas Recirculation) system having humidification effect |
DE102014111835A1 (en) | 2014-08-19 | 2016-02-25 | Gardner Denver Deutschland Gmbh | Compressor unit and method for its operation |
DE102018123871A1 (en) * | 2018-09-27 | 2020-04-02 | Volkswagen Aktiengesellschaft | Multi-stage supercharged internal combustion engine with liquid injection into the fresh gas line between two compressors |
SE2251081A1 (en) * | 2022-09-19 | 2024-03-20 | Cetech Ab | An exhaust recirculation device for a 4-stroke compression ignition engine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5701016B2 (en) * | 2010-11-09 | 2015-04-15 | 三菱重工業株式会社 | Engine exhaust gas purification device |
JP2012136957A (en) * | 2010-12-24 | 2012-07-19 | Isuzu Motors Ltd | Internal combustion engine and egr method therefor |
CN110118142A (en) * | 2019-05-05 | 2019-08-13 | 天津大学 | A kind of high pressure exhaust gas medium voltage side introducing system based on two-stage turbocharger |
AT522176B1 (en) * | 2019-07-23 | 2020-09-15 | Avl List Gmbh | METHOD OF OPERATING A COMBUSTION ENGINE |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004009794A1 (en) | 2004-02-28 | 2005-09-22 | Daimlerchrysler Ag | Internal combustion engine with two exhaust gas turbochargers |
EP1386069B1 (en) | 2001-03-14 | 2007-10-10 | Marioff Corporation Oy | Method and apparatus for reducing combustion engine emissions |
DE102006048269A1 (en) | 2006-10-12 | 2008-04-17 | Man Diesel Se | Method for operation of internal-combustion engine, particularly turbo-loaded diesel internal-combustion engine, involves recycling of exhaust gases of cooled partial flow, which takes place in cylinders of internal-combustion engine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK170218B1 (en) * | 1993-06-04 | 1995-06-26 | Man B & W Diesel Gmbh | Large pressurized diesel engine |
JP2002332919A (en) * | 2001-02-26 | 2002-11-22 | Mitsubishi Heavy Ind Ltd | Exhaust gas recirculation system |
JP4692202B2 (en) * | 2005-10-06 | 2011-06-01 | いすゞ自動車株式会社 | EGR system for two-stage supercharged engine |
-
2008
- 2008-12-10 DE DE102008061399A patent/DE102008061399A1/en not_active Withdrawn
-
2009
- 2009-08-14 KR KR1020090075181A patent/KR20100067030A/en not_active Application Discontinuation
- 2009-08-20 JP JP2009190870A patent/JP2010138892A/en active Pending
- 2009-10-22 FI FI20096087A patent/FI123593B/en not_active IP Right Cessation
- 2009-12-10 CN CN200910260812A patent/CN101749148A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1386069B1 (en) | 2001-03-14 | 2007-10-10 | Marioff Corporation Oy | Method and apparatus for reducing combustion engine emissions |
DE102004009794A1 (en) | 2004-02-28 | 2005-09-22 | Daimlerchrysler Ag | Internal combustion engine with two exhaust gas turbochargers |
DE102006048269A1 (en) | 2006-10-12 | 2008-04-17 | Man Diesel Se | Method for operation of internal-combustion engine, particularly turbo-loaded diesel internal-combustion engine, involves recycling of exhaust gases of cooled partial flow, which takes place in cylinders of internal-combustion engine |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011141631A1 (en) * | 2010-05-12 | 2011-11-17 | Wärtsilä Finland Oy | Arrangement and method for exhaust gas recirculation and turbocharging |
DE102012209286A1 (en) | 2012-06-01 | 2013-12-05 | Man Diesel & Turbo Se | Internal combustion engine with exhaust charging and exhaust gas recirculation |
WO2013178691A1 (en) | 2012-06-01 | 2013-12-05 | Man Diesel & Turbo Se | Internal combustion engine having an exhaust gas supercharging system and an exhaust gas recirculation system |
CN104074636A (en) * | 2013-12-23 | 2014-10-01 | 哈尔滨工程大学 | Diesel engine EGR (Exhaust Gas Recirculation) system having humidification effect |
DE102014111835A1 (en) | 2014-08-19 | 2016-02-25 | Gardner Denver Deutschland Gmbh | Compressor unit and method for its operation |
DE102014111835B4 (en) * | 2014-08-19 | 2017-08-31 | Gardner Denver Deutschland Gmbh | Compressor unit and method for its operation |
DE102018123871A1 (en) * | 2018-09-27 | 2020-04-02 | Volkswagen Aktiengesellschaft | Multi-stage supercharged internal combustion engine with liquid injection into the fresh gas line between two compressors |
SE2251081A1 (en) * | 2022-09-19 | 2024-03-20 | Cetech Ab | An exhaust recirculation device for a 4-stroke compression ignition engine |
WO2024063685A1 (en) * | 2022-09-19 | 2024-03-28 | Cetech Ab | An exhaust recirculation device for a 4-stroke compression ignition engine |
Also Published As
Publication number | Publication date |
---|---|
FI123593B (en) | 2013-07-31 |
FI20096087A0 (en) | 2009-10-22 |
KR20100067030A (en) | 2010-06-18 |
CN101749148A (en) | 2010-06-23 |
FI20096087A (en) | 2010-06-11 |
JP2010138892A (en) | 2010-06-24 |
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Owner name: MAN DIESEL & TURBO SE, 86153 AUGSBURG, DE |
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Free format text: PREVIOUS MAIN CLASS: F02M0025070000 Ipc: F02M0026350000 |
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