EP1853811A1 - Moteur a combustion interne turbocompresse - Google Patents

Moteur a combustion interne turbocompresse

Info

Publication number
EP1853811A1
EP1853811A1 EP06704100A EP06704100A EP1853811A1 EP 1853811 A1 EP1853811 A1 EP 1853811A1 EP 06704100 A EP06704100 A EP 06704100A EP 06704100 A EP06704100 A EP 06704100A EP 1853811 A1 EP1853811 A1 EP 1853811A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
heat exchanger
internal combustion
combustion engine
exchanger block
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Withdrawn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
EP06704100A
Other languages
German (de)
English (en)
Inventor
Jochen Eitel
Rainer Lutz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1853811A1 publication Critical patent/EP1853811A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0468—Water separation or drainage means
    • 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
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream 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
    • F02M26/13—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
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/31—Air-cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • 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
    • F02M26/15—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 in relation to engine exhaust purifying apparatus
    • 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

Definitions

  • the invention relates to an exhaust gas turbocharger internal combustion engine having at least one cylinder in which a precompressed fuel-air mixture is compressed and burned, whereby exhaust gas is produced, which is expelled from the cylinder and expanded in a turbine.
  • exhaust gas turbocharger internal combustion engine having at least one cylinder in which a precompressed fuel-air mixture is compressed and burned, whereby exhaust gas is produced, which is expelled from the cylinder and expanded in a turbine.
  • high-pressure exhaust gas recirculation part of the exhaust gas discharged from the cylinder, before it is expanded in the turbine, is recirculated via a high-pressure return line, which can be equipped with an exhaust gas cooling device.
  • low-pressure exhaust gas recirculation a portion of the exhaust gas expelled from the cylinder and expanded in the turbine is recirculated via low-pressure recirculation, which is equipped with an exhaust gas cooling device, and precompressed together with fresh air in the compressor and cooled in a charge air cooling device comprising at least one cooling circuit which is guided by at least one heat exchanger block.
  • the object of the invention is to provide an exhaust gas turbocharger internal combustion engine having at least one cylinder in which a fuel-air mixture is compressed and burned, whereby exhaust gas is discharged from the cylinder and expanded in a turbine equipped with either high pressure or low pressure exhaust gas recirculation is to create, in which the risk of corrosion is reduced.
  • the object is in an exhaust gas turbocharger internal combustion engine having at least one cylinder in which a fuel-air mixture is compressed and burned, whereby exhaust gas is discharged from the cylinder and expanded in a turbine, wherein a part of the ejected from the cylinder Exhaust gas, before or after being vented in the turbine, is recirculated via a high or low pressure return equipped with an exhaust gas cooling device comprising one or at least two cooling circuits led through heat exchanger blocks connected in series in the flow direction of the exhaust gas, achieved in that the most downstream in the flow direction of the exhaust gas heat exchanger block is arranged vertically, so that the heat exchanger block is parallel to the line of gravity of gravity from bottom to top or from top to bottom of exhaust gas flows through, wherein at the lower end of the heat a condensate collecting and / or -abloom sensible is provided. Under certain circumstances, an arrangement of the heat exchanger block that is essentially parallel to the line of action of gravity is sufficient.
  • High pressure recirculation is understood as a recirculation of exhaust gas that has not yet been relieved in the turbine.
  • the recirculated exhaust gas is combined with fresh air compressed in the compressor.
  • the compressed fresh air is cooled before merging with the recirculated exhaust gas in a charge air cooler.
  • the heat exchanger block located furthest downstream is flowed through by a low-temperature cooling circuit or by cooling air. Due to the low-temperature cooling, the recirculated exhaust gas may under certain circumstances be cooled down so far that condensate is formed.
  • the inventive arrangement and design of the furthest downstream heat exchanger block accumulation of condensate in the interior of the cherriesübertrager- blocks, in particular in a heat transfer matrix can be prevented.
  • a preferred embodiment of the turbocharger internal combustion engine is characterized in that air is used as the coolant in the cooling circuit of the most downstream heat exchanger block.
  • the heat exchanger block is preferably flowed through or around ambient air.
  • a further preferred embodiment of the exhaust-gas turbocharger internal combustion engine is characterized in that a low-temperature coolant is used as the coolant in the cooling circuit of the most downstream heat exchanger block.
  • the low-temperature coolant is preferably a conventional low-temperature coolant.
  • a further preferred embodiment of the exhaust gas turbocharger internal combustion engine is characterized in that the recirculated exhaust gas is cooled in the most downstream heat transfer block so far that condensate precipitates.
  • an exhaust gas turbocharger internal combustion engine having at least one cylinder in which a fuel-air mixture is compressed and burned, whereby exhaust gas is discharged from the cylinder and expanded in a turbine, wherein a part of the ejected from the cylinder and in the Turbine relaxed exhaust gas via a low pressure feedback, which is equipped with an exhaust gas cooler, recirculated and pre-compressed together with fresh air in the compressor and cooled in a charge air cooler, which comprises at least one cooling circuit, which is passed through at least one heat exchanger block is the above Task solved in that the heat exchanger block is arranged vertically, so that the heat exchanger block is parallel to theubensli- the gravity flows from bottom to top or from top to bottom of exhaust gas with fresh air, wherein at the bottom of the heat exchanger block a Kondensatsam is provided mei- and / or -abloom Stein. Under certain circumstances, an arrangement of the heat exchanger block which is essentially parallel to the line of action of gravity is also sufficient. - A -
  • AIs low-pressure feedback is a return of exhaust gas understood, which has already been relaxed in the turbine.
  • the recirculated exhaust gas is combined with fresh air.
  • the waste gas combined with the fresh air is pre-compressed in the compressor and cooled in the charge-air cooling device.
  • the inventive arrangement and design of the heat exchanger block an accumulation of condensate in the interior of the heat exchanger block, in particular in a heat transfer matrix, can be prevented. This can reduce the corrosive load on the heat exchanger block. This in turn allows the use of less expensive materials for the production of the heat exchanger block.
  • a preferred embodiment of the exhaust gas turbocharger internal combustion engine is characterized in that the recirculated and together with fresh air in the compressor pre-compressed exhaust gas in the heat exchanger block is cooled down so far that condensate precipitates.
  • the cooling can also take place in several stages, that is to say in a plurality of cooling circuits which are guided by heat exchanger blocks, which are connected in series in the flow direction of the exhaust gas combined with fresh air.
  • a preferred embodiment of the turbocharger internal combustion engine is characterized in that air is used as the coolant in the heat exchanger block.
  • the heat exchanger block is preferably flowed through or around ambient air.
  • a further preferred embodiment of the exhaust gas turbocharger internal combustion engine is characterized in that the heat exchanger block is traversed in the direction of gravity from top to bottom of exhaust gas.
  • This arrangement is also referred to as a downdraft arrangement and has proven to be particularly advantageous in the context of the present invention.
  • a further preferred embodiment of the exhaust gas turbocharger internal combustion engine is characterized in that the condensate collecting and / or -ab211 sharkicer internal combustion engine comprises a collecting tray for the condensate.
  • the collecting trough is preferably arranged in a lower gas collecting box of the heat exchanger block.
  • the lower gas collection box can also be formed from a different material than the heat transfer matrix. Then the separate drip pan can be omitted.
  • a further preferred embodiment of the turbocharger internal combustion engine is characterized in that the collecting trough for the condensate is made of stainless steel or plastic. As a result, the wear due to corrosion by the condensate can be reduced.
  • a further preferred embodiment of the turbocharger internal combustion engine is characterized in that the condensate collection and / or removal device comprises a Kondensatab Kunststoffö réelle which is provided in the heat exchanger block.
  • the Kondensatabrios is disposed at the lowest point of the Kondensatsammei driving.
  • Figure 1 is a circuit diagram of an exhaust gas turbocharger internal combustion engine according to the invention with high-pressure exhaust gas recirculation and
  • FIG. 2 shows a circuit diagram of an exhaust gas turbocharger internal combustion engine according to the invention with low-pressure exhaust gas recirculation.
  • the exhaust turbocharger internal combustion engine 1 comprises a cylinder block 4 in which six pistons 5 are reciprocally accommodated.
  • the exhaust turbocharger internal combustion engine 1 is supplied from the environment with fresh air.
  • the fresh air is supplied to a compressor 10 in which it is compressed.
  • the compressed fresh air passes via a line 11 into a charge air cooler 12, in which the compressed fresh air is cooled.
  • the compressed and cooled fresh air is supplied via a line 14 to the cylinder block 4, as indicated by an arrow 15.
  • the fresh air is burned, whereby exhaust gas is formed.
  • the exhaust gas is supplied via an exhaust pipe 18 to a turbine 19, in which it is relaxed.
  • An arrow 20 indicates that the exhaust gas expanded in the turbine 19 is released to the ambient air. However, not the complete amount of exhaust gas in the turbine 19 is relaxed.
  • At least a portion of the exhaust gas is diverted via a high pressure return line 21 from the exhaust pipe 18 and returned via a valve 22 in the conduit 14, as indicated by an arrow 24.
  • the recirculated exhaust gas is cooled in a first stage 26 and a second stage 27 of an exhaust gas cooling device.
  • a connecting line 30 is indicated that the compressor 10 is driven by the turbine 19.
  • the emissions are advantageous to cool the recirculated exhaust gas as deeply as possible.
  • the cooling takes place in the exhaust gas turbocharger internal combustion engine 1 shown in Figure 1 in two stages 26 and 27.
  • the coolant of the second stage 27 is substantially air and low-temperature coolant in question. Due to the low-temperature cooling in the second stage 27 can be expected with a very strong precipitation of condensates.
  • the condensates are, for example, acids, but also to a greater extent water. Low-temperature cooling makes it possible to better exploit the potential of exhaust gas recirculation with regard to emissions and consumption than with single-stage systems.
  • this vertical arrangement which is also referred to as a standing arrangement leaves avoid accumulation of condensate in the heat transfer matrix of the heat exchanger block. This reduces the corrosive load on the radiator and thus allows the use of cheaper materials, possibly even aluminum.
  • the heat exchanger block may be, for example, a round tube cooler or a heat exchanger similar to the tube bundle of a round tube heat exchanger made of steel, a copper-zinc alloy or an aluminum alloy.
  • the heat exchanger block can also be made in stacked construction of aluminum elements.
  • the heat transfer block of the second stage 27 is flowed through from top to bottom of exhaust gas.
  • the container can be either a plastic or stainless steel insert or a specially coated gas box.
  • the gas box may be made of a different material than the heat transfer matrix.
  • FIG. 2 shows an exhaust gas turbocharger internal combustion engine 41 with a so-called low-pressure exhaust gas recirculation based on a circuit diagram.
  • the exhaust gas turbocharger internal combustion engine 41 includes a cylinder block 44 in which six pistons 45 are reciprocably received.
  • an arrow 48 is indicated that the exhaust gas turbocharger internal combustion engine 41 fresh air is supplied.
  • the supplied fresh air passes through an air filter 49 and a line 51 to a compressor 53, in which the fresh air is compressed.
  • the compressed fresh air is passed via a line 55 to a charge air cooler 56, where it is cooled.
  • the cooled, compressed fresh air is supplied via a line 57 to the cylinder block 44, as indicated by an arrow 58.
  • the supplied via the line 57 fresh air is burned in a fuel air mixture, wherein exhaust gas is formed.
  • the exhaust gas is supplied via an exhaust pipe 60 to a turbine 61, where the exhaust gas is relaxed.
  • a connection line 62 indicates that the turbine 61 serves to drive the compressor 53.
  • the exhaust gas expanded in the turbine 61 passes via a line 64, in which a particle filter 65 is arranged, to a throttle valve 66. Depending on the position of the throttle valve 66, a portion of the exhaust gas is released to the environment, as indicated by an arrow 67 is. Another portion of the exhaust gas is supplied to an exhaust gas cooler 72 via a low pressure exhaust gas recirculation line 70. In the exhaust gas cooler 72, the recirculated exhaust gas is cooled. The cooled, recirculated exhaust gas is mixed or combined in line 51 with the fresh air sucked through the filter 49 via a line 73, in which a valve 74 is arranged, as indicated by an arrow 76. The mixture of exhaust gas and fresh air is compressed in the compressor 53, cooled in the charge air cooler 56 and supplied to the cylinder block 44.
  • the intercooler 56 is designed according to the present invention as a downflow cooler, that is, the mixture of fresh air and exhaust gas, which is also referred to as charge air, flows from top to bottom through the intercooler 56.
  • the condensate formed during cooling is with the flow direction from the radiator discharged and collected in the outlet box in a suitable tub made of stainless steel or plastic.
  • the reduced accumulation of condensate in the cooler matrix or the reduced residence time of the condensate in the cooler matrix reduces the corrosive load on the component. This results in a longer life.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Supercharger (AREA)

Abstract

L'invention concerne un moteur à combustion interne turbocompressé comportant au moins un cylindre dans lequel un mélange air-carburant précompressé est compressé au moyen d'un compresseur (10) et brûlé. Les gaz d'échappement formés sont expulsés du cylindre et décompressés dans une turbine (19). Une partie des gaz d'échappement expulsés du cylindre est recyclée avant décompression dans la turbine, par l'intermédiaire d'une conduite de recirculation haute pression pourvue d'un dispositif de refroidissement de gaz d'échappement présentant au moins deux circuits de refroidissement guidés au travers de blocs échangeurs thermiques (26, 27) disposés l'un derrière l'autre dans le sens de flux des gaz d'échappement. L'invention vise à mettre en oeuvre un moteur à combustion interne turbocompressé de fabrication économique, présentant un rendement élevé. A cet effet, le bloc échangeur thermique (27) le plus éloigné en aval dans le sens de flux des gaz d'échappement est disposé verticalement de telle manière qu'il est parcouru de haut en bas ou de bas en haut par les gaz d'échappement, parallèlement à la ligne d'action de la gravité, un dispositif de recueillement et/ou d'évacuation de condensat étant disposé sur l'extrémité inférieure du bloc échangeur thermique.
EP06704100A 2005-02-21 2006-01-16 Moteur a combustion interne turbocompresse Withdrawn EP1853811A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005008103A DE102005008103A1 (de) 2005-02-21 2005-02-21 Abgasturboladerbrennkraftmaschine
PCT/EP2006/000319 WO2006087062A1 (fr) 2005-02-21 2006-01-16 Moteur a combustion interne turbocompresse

Publications (1)

Publication Number Publication Date
EP1853811A1 true EP1853811A1 (fr) 2007-11-14

Family

ID=36499231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06704100A Withdrawn EP1853811A1 (fr) 2005-02-21 2006-01-16 Moteur a combustion interne turbocompresse

Country Status (6)

Country Link
US (1) US7921648B2 (fr)
EP (1) EP1853811A1 (fr)
JP (1) JP2008530439A (fr)
CN (1) CN101124395A (fr)
DE (1) DE102005008103A1 (fr)
WO (1) WO2006087062A1 (fr)

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DE102005008103A1 (de) 2006-08-31
CN101124395A (zh) 2008-02-13
WO2006087062A1 (fr) 2006-08-24
US20080190108A1 (en) 2008-08-14
JP2008530439A (ja) 2008-08-07
US7921648B2 (en) 2011-04-12

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