EP3092384A1 - Exhaust gas recirculation cooler cleaning method - Google Patents

Exhaust gas recirculation cooler cleaning method

Info

Publication number
EP3092384A1
EP3092384A1 EP14803046.3A EP14803046A EP3092384A1 EP 3092384 A1 EP3092384 A1 EP 3092384A1 EP 14803046 A EP14803046 A EP 14803046A EP 3092384 A1 EP3092384 A1 EP 3092384A1
Authority
EP
European Patent Office
Prior art keywords
egr
exhaust gas
internal combustion
line
combustion engine
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.)
Ceased
Application number
EP14803046.3A
Other languages
German (de)
French (fr)
Inventor
Thomas Hoen
Thorsten Kräuter
Ulf Klein
Michael Tolles
Andreas Friesen
Andreas Boemer
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.)
Deutz AG
Original Assignee
Deutz 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 Deutz AG filed Critical Deutz AG
Publication of EP3092384A1 publication Critical patent/EP3092384A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F02D41/0077—Control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position
    • 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
    • F02M26/13—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
    • 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
    • F02M26/42—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
    • 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
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
    • 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
    • F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
    • 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
    • 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
    • Y02T10/40—Engine management systems

Definitions

  • From DE 40 07 516 is a diesel engine with an exhaust pipe, in which an exhaust gas turbine of an exhaust gas turbocharger and a particulate filter are arranged and with a combustion air line, in which a supercharger of the exhaust gas turbocharger is provided, as well as with an exhaust gas recirculation line downstream of the particulate filter the exhaust pipe branches off and connects them to the combustion air line, wherein downstream of the exhaust gas turbine an oxidation catalyst and behind this the particulate filter are arranged in the exhaust pipe and that in the exhaust gas recirculation line, an exhaust gas cooler is known.
  • a reverse airflow may be used to clean the EGR cooler.
  • a single charge air cooler is used to cool the mixture of charge air and recirculated exhaust gas.
  • a flow valve that can be moved between open, bypass, and reverse positions is used to control the flow of the charge air / recirculated exhaust gas mixture through the radiator. The reverse position of the flow valve provides a reverse purge flow through the cooling passages to remove accumulated soot particles in the radiator.
  • the method provided by Kennedy may use contaminated exhaust air containing soot particles to clean the EGR cooler, as well as increased complexity in exhaust flow design through the EGR cooler.
  • An exemplary system includes an EGR valve for selectively diverting a portion of the exhaust gas through an EGR passage to an intake side of the internal combustion engine, an EGR cooler disposed in the EGR passage, the EGR cooler having an exhaust side and a suction side and an intake pressurized air supply system having a compressed air passage, wherein the intake pressurized air supply system is configured to selectively divert a portion of the intake pressurized air compressed by the turbocharger through the EGR cooler to remove particulate matter deposited in the EGR cooler.
  • a valve disposed in the compressed air passage may control the flow of intake compressed air.
  • the valve for controlling the intake pressurized air flow through the intake pressure passage may be omitted if the compressed air passage is sized and oriented so as not to interfere with the flow of EGR gas into the EGR cooler and that it is still possible to adequately control the EGR Supply quantity of EGR flow for engine operation.
  • turbocharger suction compressed air which is relatively free of soot particulate available from the engine turbocharger, may be used to purge the EGR cooler to generate sufficient turbulence to detach soot particles deposited in the EGR cooler.
  • the compressed air may be used to remove radiator contaminants if EGR is not used for engine operation to reduce any disturbances to EGR flow operation.
  • the object of the present invention is to avoid the abovementioned disadvantages and to provide an internal combustion engine with EGR in order to reliably maintain the exhaust gas limit values.
  • an internal combustion engine with exhaust gas recirculation comprising at least one turbocharger, at least one engine control unit, at least one intake pipe, at least one exhaust pipe having at least one EGR pipe, the EGR pipe having at least one EGR valve in said EGR passage for diverting a portion of the exhaust gas through said EGR passage to at least one downstream EGR cooler and its EGR cooler exhaust side, wherein the EGR cooler with its suction side by means of EGR intake manifold with the intake passage is connected, wherein the EGR valve is so close and obviously designed that are removed by additional exhaust pressure pulses, which get into the EGR cooler, the deposited there soot particles.
  • EGR exhaust gas recirculation
  • At least one EGR valve is arranged downstream of the EGR cooler and upstream of the intake line.
  • At least one intercooler is arranged between the turbocharger, in particular the fresh air compressor, and the intake line.
  • the intake line and / or the EGR intake line piece has at least one temperature sensor.
  • the invention further includes a method of operating an exhaust gas recirculation (EGR) internal combustion engine comprising at least one turbocharger, at least one engine control unit, at least one intake manifold, at least one exhaust conduit having at least one EGR conduit, the EGR conduit at least one EGR valve in said EGR passage for diverting a portion of the exhaust gas through said EGR passage to at least one downstream EGR cooler and its EGR cooler exhaust side, wherein the EGR cooler with its suction side by means of EGR intake pipe is connected to the intake manifold, wherein the EGR valve is closed and apparently designed so that additional exhaust pressure pulses are generated, which get into the EGR cooler to remove deposited in the EGR cooler soot particles dissolved.
  • EGR exhaust gas recirculation
  • Figure 1 is a schematic representation of the internal combustion engine
  • Figure 2 shows the time course of the flap opening angle during the
  • FIG. 1 shows a schematic representation of the internal combustion engine 1 is shown.
  • the internal combustion engine 1 is in the embodiment of Figure 1 is a six-cylinder diesel engine with intake and exhaust tract. Next, the internal combustion engine 1 to a turbocharger 2, which is communicatively connected to intake and exhaust tract.
  • the exhaust pipe 3 of the internal combustion engine 1 has two EGR lines 4, each having an EGR valve 5, which is designed to be open and closed.
  • the EGR lines 4 each open into an EGR cooler 6, the suction side of the EGR cooler 7 is communicatively connected to the EGR intake pipe section 8.
  • a reed valve 14 is arranged.
  • a charge air cooler 10 is arranged between the intake pipe 9 and the turbocharger 2, a charge air cooler 10 is arranged.
  • the intake pipe 9 has a temperature sensor 12 and a pressure sensor 13, which communicate with the engine control unit 11 by means of electrical lines or radio links.
  • the temperature sensor 12 and the pressure sensor 13 supply their data for controlling the internal combustion engine 1 and the cleaning of the EGR cooler 6 to the engine control unit 11, which in turn controls the EGR valves 5 and opens and closes them by means of closing and then opening an EGR valve 5 to generate a surge, which frees the EGR cooler 6 from the deposited there soot particles.
  • the cleaning takes place by means of electronic control of the EGR valve 5, which, as can be seen in FIG. 2, is opened and closed in a pulse-like manner.
  • An alternative embodiment provides that the EGR flap position is time-controlled. This means that the cleaning process takes place within a defined time interval.
  • a temperature control is implemented instead of a time, which is realized by a temperature sensor behind the EGR cooler.
  • the function is shown as a function of time in FIG.
  • the cleaning effect in the EGR cooler is that the superficially adhering soot deposition is greatly reduced by forced pressure pulses.
  • the pressure pulse is caused by increasing alternating valve opening angle of the upstream EGR actuator, as can be seen in Figure 2.
  • the invention is applicable to all internal combustion engine with external EGR system and electronic control of the EGR actuator. reference numeral

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The invention relates to an internal combustion engine with an exhaust gas recirculation (EGR) capability, comprising at least one turbocharger (2), at least one engine controller (11), at least one suction line (9), and at least one exhaust gas line (3) which has at least one EGR line (4). The EGR line (4) has at least one EGR valve (5) in said EGR line (4) in order to reroute a part of the exhaust gas flowing through said EGR line (4) to at least one EGR cooler (6) or an EGR cooler exhaust gas side (6) arranged downstream in the flow direction, the suction side (7) of the EGR cooler (14) being connected to the suction line (9) by means of an EGR suction line piece (8). The EGR valve (5) is designed to be openable and closable such that soot particles which have reached the EGR cooler and have been deposited in the EGR cooler are removed by additional exhaust gas pressure pulses.

Description

Abgasrückführungs-Kühler Reinigungsverfahren  Exhaust gas recirculation cooler cleaning process
B E S C H R E I B U N G DESCRIPTION
Aus der DE 40 07 516 ist ein Dieselmotor mit einer Abgasleitung, in der eine Abgasturbine eines Abgasturboladers und ein Partikelfilter angeordnet sind und mit einer Verbrennungsluftleitung, in der ein Lader des Abgasturboladers vorgesehen ist, sowie mit einer Abgasrückführleitung, die in Strömungsrichtung hinter dem Partikelfilter von der Abgasleitung abzweigt und diese mit der Verbrennungsluftleitung verbindet, wobei in Strömungsrichtung hinter der Abgasturbine ein Oxidationskatalysator und hinter diesem das Partikelfilter in der Abgasleitung angeordnet sind und dass in der Abgasrückführleitung ein Abgaskühler vorgesehen ist, bekannt. From DE 40 07 516 is a diesel engine with an exhaust pipe, in which an exhaust gas turbine of an exhaust gas turbocharger and a particulate filter are arranged and with a combustion air line, in which a supercharger of the exhaust gas turbocharger is provided, as well as with an exhaust gas recirculation line downstream of the particulate filter the exhaust pipe branches off and connects them to the combustion air line, wherein downstream of the exhaust gas turbine an oxidation catalyst and behind this the particulate filter are arranged in the exhaust pipe and that in the exhaust gas recirculation line, an exhaust gas cooler is known.
Bei einem anderen, durch das US-Patent Nr. 7,0 1 ,080 an Kennedy bereitgestellten Beispiel, kann zum Reinigen des AGR-Kühlers ein umgekehrter Luftstrom verwendet werden. Bei diesem Beispiel wird zum Kühlen der Mischung aus Ladeluft und rückgeführtem Abgas ein einzelner Ladeluft- kühler verwendet. Ein Strömungsventil, das zwischen offener, Bypass- und Umkehrposition bewegt werden kann, wird zum Steuern der Strömung der Mischung aus Ladeluft und rückgeführtem Abgas durch den Kühler verwendet. Die Umkehrposition des Strömungsventils liefert eine umgekehrte Reinigungsströmung durch die Kühlpassagen, um in dem Kühler akkumu- lierte Rußpartikel zu entfernen. Das von Kennedy bereitgestellte Verfahren kann jedoch kontaminierte Abluft, die Rußpartikel enthält, zum Reinigen des AGR-Kühlers verwenden, sowie eine vergrößerte Komplexität beim Abgasströmungsdesign durch den AGR-Kühler. In der DE 10 2009 046 016 A1 werden hierin Systeme und Verfahren zum Verwenden von Ansaugdruckluft, die frei von Rußpartikeln ist, zum Reinigen des AGR-Kühlers eines Verbrennungsmotors mit einem Turbolader be- reitgestellt. Ein beispielhaftes System enthält ein AGR-Ventil zum selektiven Umleiten eines Teils des Abgases durch einen AGR-Kanal zu einer Ansaugseite des Verbrennungsmotors, einen in dem AGR-Kanal angeordneten AGR-Kühler, wobei der AGR-Kühler eine Abgasseite und eine Ansaug- seite aufweist, und ein Ansaugdruckluftzufuhrsystem mit einem Druckluftkanal, wobei das Ansaugdruckluftzufuhrsystem konfiguriert ist, einen Teil der von dem Turbolader komprimierten Ansaugdruckluft selektiv durch den AGR-Kühler umzuleiten, um in dem AGR-Kühler abgeschiedene Rußpartikel zu entfernen. Bei einigen Beispielen kann ein in dem Druckluftkanal an- geordnetes Ventil die Strömung der Ansaugdruckluft steuern. Bei anderen Beispielen kann das Ventil zum Steuern der Ansaugdruckluftströmung durch den Ansaugdruckkanal wegfallen, wenn der Druckluftkanal derart bemessen und ausgerichtet wird, dass er die Strömung von AGR-Gas in den AGR-Kühler nicht stört, und dass es immer noch möglich ist, die adäquate Menge an AGR-Strömung für den Motorbetrieb zuzuführen. Auf diese Weise kann Turboladeransaugdruckluft, die relativ frei von Rußpartikulat ist und die von dem Motorturbolader erhältlich ist, zum Durchspülen des AGR- Kühlers verwendet werden, um ausreichend Turbulenzen zum Ablösen von in dem AGR-Kühler abgeschiedenen Rußpartikeln zu erzeugen. Bei einem Beispiel kann die Druckluft zum Entfernen von Kühlerverunreinigungen verwendet werden, wenn AGR nicht für den Motorbetrieb zum Reduzieren etwaiger Störungen am AGR-Strömungsbetrieb verwendet wird. In another example provided by Kennedy US Pat. No. 3,010,080, a reverse airflow may be used to clean the EGR cooler. In this example, a single charge air cooler is used to cool the mixture of charge air and recirculated exhaust gas. A flow valve that can be moved between open, bypass, and reverse positions is used to control the flow of the charge air / recirculated exhaust gas mixture through the radiator. The reverse position of the flow valve provides a reverse purge flow through the cooling passages to remove accumulated soot particles in the radiator. However, the method provided by Kennedy may use contaminated exhaust air containing soot particles to clean the EGR cooler, as well as increased complexity in exhaust flow design through the EGR cooler. DE 10 2009 046 016 A1 discloses systems and methods for using suction compressed air, which is free of soot particles, for cleaning the EGR cooler of an internal combustion engine with a turbocharger. Semi asked. An exemplary system includes an EGR valve for selectively diverting a portion of the exhaust gas through an EGR passage to an intake side of the internal combustion engine, an EGR cooler disposed in the EGR passage, the EGR cooler having an exhaust side and a suction side and an intake pressurized air supply system having a compressed air passage, wherein the intake pressurized air supply system is configured to selectively divert a portion of the intake pressurized air compressed by the turbocharger through the EGR cooler to remove particulate matter deposited in the EGR cooler. In some examples, a valve disposed in the compressed air passage may control the flow of intake compressed air. In other examples, the valve for controlling the intake pressurized air flow through the intake pressure passage may be omitted if the compressed air passage is sized and oriented so as not to interfere with the flow of EGR gas into the EGR cooler and that it is still possible to adequately control the EGR Supply quantity of EGR flow for engine operation. In this manner, turbocharger suction compressed air, which is relatively free of soot particulate available from the engine turbocharger, may be used to purge the EGR cooler to generate sufficient turbulence to detach soot particles deposited in the EGR cooler. In one example, the compressed air may be used to remove radiator contaminants if EGR is not used for engine operation to reduce any disturbances to EGR flow operation.
Daran ist nachteilig, dass die Reinigung des AGR-Kühlers mit großem Auf- wand betrieben werden muss. This has the disadvantage that the cleaning of the EGR cooler has to be operated with great effort.
Nachteilig ist es auch, dass es beim Einsatz von AGR-Kühlern immer wieder zum Kühlerwirkungsgradverlust aufgrund von übermäßigen Rußablagerungen (Fouling) und somit zur Nichteinhaltung der Abgasgrenzwerte kommt. It is also disadvantageous that the use of EGR coolers repeatedly leads to loss of cooler efficiency due to excessive soot deposits (fouling) and thus to non-compliance with the exhaust gas limit values.
Da das Nichteinhalten der Abgasgrenzwerte ein Verstoß gegen die Gesetzgebung ist, wurde ein Prinzip entwickelt, welches diese Verschmutzungen eliminiert und die Abgasemissionen in den geforderten Grenzen hält. Aufgabe der vorliegenden Erfindung ist es, die oben genannten Nachteile zu vermeiden und eine Brennkraftmaschine mit AGR zu schaffen, um zuverlässig die Abgasgrenzwerte einzuhalten. Since non-compliance with the exhaust emission limits is a violation of the legislation, a principle has been developed that eliminates these pollutants and keeps the exhaust emissions within the required limits. The object of the present invention is to avoid the abovementioned disadvantages and to provide an internal combustion engine with EGR in order to reliably maintain the exhaust gas limit values.
Die Aufgabe wird durch eine Brennkraftmaschine mit Abgasrückführung (AGR) gelöst, umfassend wenigstens einen Turbolader, wenigstens ein Motorsteuergerät, wenigstens eine Ansaugleitung, wenigstens eine Abgas- leitung, die wenigstens eine AGR-Leitung aufweist, wobei die AGR-Leitung wenigstens ein AGR-Ventil in besagter AGR-Leitung zum Umleiten eines Teils des Abgases durch besagte AGR-Leitung zu wenigstens einem in Strömungsrichtung nachgeordneten AGR-Kühler bzw. seiner AGR-Kühler- Abgasseite aufweist, wobei der AGR-Kühler mit seiner Ansaugseite mittels AGR-Ansaugleitungsstück mit der Ansaugleitung verbunden ist, wobei das AGR-Ventil derart schließ- und offenbar ausgestaltet ist, dass durch zusätzliche Abgasdruckpulse, die in den AGR-Kühler gelangen, die dort abgeschiedenen Rußpartikel entfernt werden. The object is achieved by an internal combustion engine with exhaust gas recirculation (EGR) comprising at least one turbocharger, at least one engine control unit, at least one intake pipe, at least one exhaust pipe having at least one EGR pipe, the EGR pipe having at least one EGR valve in said EGR passage for diverting a portion of the exhaust gas through said EGR passage to at least one downstream EGR cooler and its EGR cooler exhaust side, wherein the EGR cooler with its suction side by means of EGR intake manifold with the intake passage is connected, wherein the EGR valve is so close and obviously designed that are removed by additional exhaust pressure pulses, which get into the EGR cooler, the deposited there soot particles.
In einer alternativen Ausgestaltung ist vorgesehen, dass wenigstens ein AGR-Ventil nach dem AGR-Kühler und vor der Ansaugleitung angeordnet ist. In an alternative embodiment, it is provided that at least one EGR valve is arranged downstream of the EGR cooler and upstream of the intake line.
Weiter ist vorteilhafterweise vorgesehen, dass zwischen Turbolader, insbesondere dem Frischluftkompressor, und der Ansaugleitung wenigstens ein Ladeluftkühler angeordnet ist. Furthermore, it is advantageously provided that at least one intercooler is arranged between the turbocharger, in particular the fresh air compressor, and the intake line.
In einer anderen vorteilhaften Ausgestaltung ist vorgesehen, dass die Ansaugleitung und/oder das AGR-Ansaugleitungsstück wenigstens einen Temperatursensor aufweist. In another advantageous embodiment, it is provided that the intake line and / or the EGR intake line piece has at least one temperature sensor.
Eine vorteilhafte Weiterbildung sieht vor, dass die Ansaugleitung und/oder das AGR-Ansaugleitungsstück wenigstens einen Drucksensor aufweist. Weiter beinhaltet die Erfindung ein Verfahren zum Betreiben einer Brennkraftmaschine mit Abgasrückführung (AGR), umfassend wenigstens einen Turbolader, wenigstens ein Motorsteuergerät, wenigstens eine Ansaugleitung, wenigstens eine Abgasleitung, die wenigstens eine AGR-Leitung auf- weist, wobei die AGR-Leitung wenigstens ein AGR-Ventil in besagter AGR- Leitung zum Umleiten eines Teils des Abgases durch besagte AGR-Leitung zu wenigstens einem in Strömungsrichtung nachgeordneten AGR-Kühler bzw. seiner AGR-Kühler-Abgasseite aufweist, wobei der AGR-Kühler mit seiner Ansaugseite mittels AGR-Ansaugleitungsstück mit der Ansauglei- tung verbunden ist, wobei das AGR-Ventil derart schließ- und offenbar ausgestaltet ist, dass zusätzliche Abgasdruckpulse entstehen, die in den AGR- Kühler gelangen, um in dem AGR-Kühler abgeschiedene Rußpartikel zu entfernen, gelöst. Weitere Merkmale der Erfindung gehen aus der nachfolgenden Beschreibung und den Zeichnungen hervor, in der ein Ausführungsbeispiel der Erfindung schematisch dargestellt ist. An advantageous development provides that the intake line and / or the EGR intake line piece has at least one pressure sensor. The invention further includes a method of operating an exhaust gas recirculation (EGR) internal combustion engine comprising at least one turbocharger, at least one engine control unit, at least one intake manifold, at least one exhaust conduit having at least one EGR conduit, the EGR conduit at least one EGR valve in said EGR passage for diverting a portion of the exhaust gas through said EGR passage to at least one downstream EGR cooler and its EGR cooler exhaust side, wherein the EGR cooler with its suction side by means of EGR intake pipe is connected to the intake manifold, wherein the EGR valve is closed and apparently designed so that additional exhaust pressure pulses are generated, which get into the EGR cooler to remove deposited in the EGR cooler soot particles dissolved. Further features of the invention will become apparent from the following description and the drawings, in which an embodiment of the invention is shown schematically.
Es zeigen: Show it:
Figur 1 eine schematische Darstellung der Brennkraftmaschine Figure 1 is a schematic representation of the internal combustion engine
Figur 2 den zeitlichen Verlauf des Klappenöffnungswinkels während des Figure 2 shows the time course of the flap opening angle during the
Reinigungsvorgangs  cleaning process
In Figur 1 wird eine schematische Darstellung der Brennkraftmaschine 1 dargestellt. 1 shows a schematic representation of the internal combustion engine 1 is shown.
Die Brennkraftmaschine 1 ist im Ausführungsbeispiel nach Figur 1 ein Sechszylinderdieselmotor mit Ansaugtrakt und Abgastrakt. Weiter weist die Brennkraftmaschine 1 einen Turbolader 2 auf, der mit Ansaugtrakt und Abgastrakt kommunizierend verbunden ist. Die Abgasleitung 3 der Brennkraftmaschine 1 weist zwei AGR-Leitungen 4 auf, die über je ein AGR-Ventil 5 verfügen, das offen- und schließbar ausgeführt ist. Die AGR-Leitungen 4 münden jeweils in einem AGR-Kühler 6, dessen Ansaugseite des AGR- Kühlers 7 mit dem AGR-Ansaugleitungsstück 8 kommunizierend verbunden ist. Am Ende - aus Strömungssicht - von AGR-Ansaugleitungsstück 8, noch vor der Ansaugleitung 9, ist ein Reed valve 14 angeordnet. Zwischen der Ansaugleitung 9 und dem Turbolader 2 ist ein Ladeluftkühler 10 angeordnet. Die Ansaugleitung 9 weist Temperatursensor 12 und einen Drucksensor 13 auf, die mittels elektrischer Leitungen bzw. Funkverbindungen mit dem Motorsteuergerät 11 kommunizieren. Der Temperatursensor 12 und der Drucksensor 13 liefern ihre Daten zur Steuerung der Brennkraft- maschine 1 und der Abreinigung des AGR-Kühlers 6 an das Motorsteuergerät 11 , das wiederrum die AGR-Ventile 5 ansteuert und diese öffnet und schließt, um mittels eines durch das Schließen und anschließendes Öffnen eines AGR-Ventils 5 einen Druckstoß zu erzeugen, der den AGR-Kühler 6 von den dort abgeschiedenen Rußpartikeln befreit. Die Abreinigung erfolgt mittels elektronischer Regelung des AGR-Ventils 5, welches, wie in Figur 2 zu sehen ist, impulsartig geöffnet und geschlossen wird. Eine alternative Ausgestaltung sieht vor, dass die AGR-Klappenstellung zeitgesteuert ist. Das heißt, dass der Reinigungsvorgang in einem festgelegten Zeitintervall stattfindet. Eine andere alternative Ausgestaltung sieht vor, dass anstatt einer Zeit- eine Temperaturregelung umgesetzt wird, was durch einen Temperatursensor hinter dem AGR-Kühler realisiert wird. Beim Erreichen einer festgelegten Temperatur findet das "Abblasen" des Rußes statt. Bei beiden Varianten (Temperatur, Zeit) ist die Funktion in Abhängigkeit der Zeit in Figur 2 dargestellt. Der Reinigungseffekt im AGR-Kühler besteht darin, dass die oberflächlich anhaftende Rußablagerung durch erzwungene Druckimpulse stark reduziert wird. Der Druckimpuls wird durch steigende alternierende Klappenöffnungswinkel des vorgeschalteten AGR-Stellers hervorgerufen, wie dies in Figur 2 zu sehen ist. Die Erfindung ist für alle Verbrennungskraftmaschinen mit externem AGR-System und elektronischer Rege- lung des AGR-Stellers anwendbar. Bezugszeichen The internal combustion engine 1 is in the embodiment of Figure 1 is a six-cylinder diesel engine with intake and exhaust tract. Next, the internal combustion engine 1 to a turbocharger 2, which is communicatively connected to intake and exhaust tract. The exhaust pipe 3 of the internal combustion engine 1 has two EGR lines 4, each having an EGR valve 5, which is designed to be open and closed. The EGR lines 4 each open into an EGR cooler 6, the suction side of the EGR cooler 7 is communicatively connected to the EGR intake pipe section 8. At the end - from the flow view - of EGR intake pipe section 8, even before the suction line 9, a reed valve 14 is arranged. Between the intake pipe 9 and the turbocharger 2, a charge air cooler 10 is arranged. The intake pipe 9 has a temperature sensor 12 and a pressure sensor 13, which communicate with the engine control unit 11 by means of electrical lines or radio links. The temperature sensor 12 and the pressure sensor 13 supply their data for controlling the internal combustion engine 1 and the cleaning of the EGR cooler 6 to the engine control unit 11, which in turn controls the EGR valves 5 and opens and closes them by means of closing and then opening an EGR valve 5 to generate a surge, which frees the EGR cooler 6 from the deposited there soot particles. The cleaning takes place by means of electronic control of the EGR valve 5, which, as can be seen in FIG. 2, is opened and closed in a pulse-like manner. An alternative embodiment provides that the EGR flap position is time-controlled. This means that the cleaning process takes place within a defined time interval. Another alternative embodiment provides that a temperature control is implemented instead of a time, which is realized by a temperature sensor behind the EGR cooler. When reaching a specified temperature, the "blow off" of the soot takes place. In both variants (temperature, time), the function is shown as a function of time in FIG. The cleaning effect in the EGR cooler is that the superficially adhering soot deposition is greatly reduced by forced pressure pulses. The pressure pulse is caused by increasing alternating valve opening angle of the upstream EGR actuator, as can be seen in Figure 2. The invention is applicable to all internal combustion engine with external EGR system and electronic control of the EGR actuator. reference numeral
1 Brennkraftmaschine 1 internal combustion engine
2 Turbolader  2 turbochargers
3 Abgasleitung  3 exhaust pipe
4 AGR-Leitung  4 EGR line
5 AGR-Ventil  5 EGR valve
6 Abgasseite des AGR-Kühlers 6 Exhaust side of the EGR cooler
7 Ansaugseite des AGR-Kühler7 Intake side of the EGR cooler
8 AGR-Ansaugleitungsstück8 EGR intake manifold
9 Ansaugleitung 9 suction line
10 Ladeluftkühler  10 intercooler
11 Motorsteuergerät  11 engine control unit
12 Temperatursensor  12 temperature sensor
13 Drucksensor  13 pressure sensor
14 Reed valve  14 Reed valve
15 AGR-Kühler  15 EGR coolers

Claims

A N S P R Ü C H E
1. Brennkraftmaschine mit Abgasrückführung (AGR), umfassend wenigstens einen Turbolader (2), wenigstens ein Motorsteuergerät (1 1 ), wenigstens eine Ansaugleitung (9), wenigstens eine Abgasleitung (3), die wenigstens eine AGR-Leitung (4) aufweist, wobei die AGR-Leitung (4) wenigstens ein AGR-Ventil (5) in besagter AGR-Leitung (4) zum Umleiten eines Teils des Abgases durch besagte AGR-Leitung (4) zu wenigstens einem in Strömungsrichtung nachgeordneten AGR-Kühler (15) bzw. seiner AGR-Kühler- Abgasseite (6) aufweist, wobei der AGR-Kühler (15) mit seiner Ansaugseite (7) mittels AGR-Ansaugleitungsstück (8) mit der Ansaugleitung (9) verbun- den ist, wobei das AGR-Ventil (5) derart schließ- und offenbar ausgestaltet ist, dass durch zusätzliche Abgasdruckpulse, die in den AGR-Kühler gelangen, die dort abgeschiedenen Rußpartikel entfernt werden. An exhaust gas recirculation (EGR) internal combustion engine comprising at least one turbocharger (2), at least one engine control unit (1 1), at least one intake pipe (9), at least one exhaust pipe (3) having at least one EGR pipe (4), wherein the EGR passage (4) has at least one EGR valve (5) in said EGR passage (4) for diverting a portion of the exhaust gas through said EGR passage (4) to at least one downstream EGR cooler (15). or its EGR cooler exhaust side (6), wherein the EGR cooler (15) is connected with its suction side (7) by means of EGR intake line piece (8) with the intake line (9), wherein the EGR valve (5) is so closed and apparently designed that are removed by additional exhaust pressure pulses, which get into the EGR cooler, the deposited there soot particles.
2. Brennkraftmaschine nach Anspruch 1 , 2. Internal combustion engine according to claim 1,
dadurch gekennzeichnet, dass zwischen Turbolader (2), insbesondere dem Frischluftkompressor, und der Ansaugleitung (9) wenigstens ein Ladeluftkühler (10) angeordnet ist. characterized in that between turbocharger (2), in particular the fresh air compressor, and the intake line (9) at least one intercooler (10) is arranged.
3. Brennkraftmaschine nach Anspruch 1 oder 2, 3. Internal combustion engine according to claim 1 or 2,
dadurch gekennzeichnet, dass die Ansaugleitung (9) und/oder das AGR- Ansaugleitungsstück (8) wenigstens einen Temperatursensor (12) aufweist. characterized in that the suction line (9) and / or the EGR intake pipe section (8) has at least one temperature sensor (12).
4. Brennkraftmaschine nach einem oder mehreren der vorgenannten Ansprüche, 4. Internal combustion engine according to one or more of the preceding claims,
dadurch gekennzeichnet, dass die Ansaugleitung (9) und/oder das AGR- Ansaugleitungsstück (8) wenigstens einen Drucksensor (13) aufweist. characterized in that the suction line (9) and / or the EGR intake pipe section (8) has at least one pressure sensor (13).
5. Brennkraftmaschine nach einem oder mehreren der vorgenannten Ansprüche, 5. Internal combustion engine according to one or more of the preceding claims,
dadurch gekennzeichnet, dass im Wesentlichen zwischen Ansaugleitung (9) und AGR-Ansaugleitungsstück (8) wenigstens ein Reed valve (14) an- geordnet ist. characterized in that substantially at least one reed valve (14) is arranged between the intake pipe (9) and the EGR intake pipe piece (8).
6. Verfahren zum Betreiben einer Brennkraftmaschine nach einem oder mehreren der vorgenannten Ansprüche, 6. A method for operating an internal combustion engine according to one or more of the preceding claims,
dadurch gekennzeichnet, dass eine Brennkraftmaschine eines oder mehre- ren der vorgenannten Ansprüche zum Einsatz kommt. characterized in that an internal combustion engine one or more of the aforementioned claims is used.
EP14803046.3A 2013-12-16 2014-11-19 Exhaust gas recirculation cooler cleaning method Ceased EP3092384A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013020642.1A DE102013020642A1 (en) 2013-12-16 2013-12-16 Exhaust gas recirculation cooler cleaning process
PCT/EP2014/003089 WO2015090498A1 (en) 2013-12-16 2014-11-19 Exhaust gas recirculation cooler cleaning method

Publications (1)

Publication Number Publication Date
EP3092384A1 true EP3092384A1 (en) 2016-11-16

Family

ID=51987113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14803046.3A Ceased EP3092384A1 (en) 2013-12-16 2014-11-19 Exhaust gas recirculation cooler cleaning method

Country Status (3)

Country Link
EP (1) EP3092384A1 (en)
DE (1) DE102013020642A1 (en)
WO (1) WO2015090498A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016210198A1 (en) 2016-06-09 2017-12-14 Zf Friedrichshafen Ag Cooling of components with a pressure surge generator to form a turbulent coolant flow
CN109339962A (en) * 2018-09-28 2019-02-15 潍柴动力股份有限公司 A kind of control method and device of EGR valve

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4007516C2 (en) 1990-03-09 1997-03-06 Kloeckner Humboldt Deutz Ag Diesel engine
US7011080B2 (en) 2002-06-21 2006-03-14 Detroit Diesel Corporation Working fluid circuit for a turbocharged engine having exhaust gas recirculation
US6904898B1 (en) * 2003-09-09 2005-06-14 Volvo Lastyagnar Ab Method and arrangement for reducing particulate load in an EGR cooler
JP4396581B2 (en) * 2005-06-02 2010-01-13 株式会社デンソー EGR control device for internal combustion engine
DE102006028146A1 (en) * 2006-06-16 2007-12-20 Mahle International Gmbh Exhaust gas recirculation device for an internal combustion engine and associated operating method
US8250865B2 (en) 2008-11-05 2012-08-28 Ford Global Technologies, Llc Using compressed intake air to clean engine exhaust gas recirculation cooler
US8375713B2 (en) * 2009-12-04 2013-02-19 International Engine Intellectual Property Company, Llc EGR cooler cleaning system and method
US8631642B2 (en) * 2009-12-22 2014-01-21 Perkins Engines Company Limited Regeneration assist calibration
US8820301B2 (en) * 2010-09-01 2014-09-02 GM Global Technology Operations LLC Modulating hydrodynamic flow characteristics to alleviate automotive heat exchanger contamination

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2015090498A1 *

Also Published As

Publication number Publication date
WO2015090498A1 (en) 2015-06-25
DE102013020642A1 (en) 2015-06-18

Similar Documents

Publication Publication Date Title
DE69704322T2 (en) Exhaust gas recirculation device
DE102013002894B4 (en) Turbine for an exhaust gas turbocharger
DE102009014277B4 (en) Device for operating a diesel internal combustion engine with turbocharging
DE102006054117B4 (en) Crankcase ventilation of an internal combustion engine controlled in partial and full load operation
DE102006055814B4 (en) Turbocharged combustion engine with exhaust gas recirculation
DE102008036896A1 (en) Exhaust gas recirculation system for an internal combustion engine
DE202014009592U1 (en) Exhaust gas treatment device for the treatment of exhaust gas of an internal combustion engine and internal combustion engine
DE112007000298B4 (en) Exhaust element for system for the discharge of gases
DE10235013A1 (en) Method for determining a boost pressure setpoint in an internal combustion engine with an exhaust gas turbocharger
EP3092384A1 (en) Exhaust gas recirculation cooler cleaning method
AT513133B1 (en) Large diesel engine
DE102010045503B4 (en) Device for exhaust gas recirculation on an internal combustion engine with combined stowage flap and bypass valve
DE102013008827A1 (en) Charged internal combustion engine
DE102014007167A1 (en) Internal combustion engine and method for operating an internal combustion engine
EP2737195B1 (en) Supercharged internal combustion engine
DE102016219774B4 (en) System for a motor vehicle and method for operating an internal combustion engine for a motor vehicle
DE102014016877A1 (en) Method for operating an internal combustion engine and corresponding internal combustion engine
DE102012109270A1 (en) Combustion engine, has exhaust gas return line opening into intake line downstream of compressor, and pre-cooling device arranged upstream of or in region of non-return valve that is arranged upstream of exhaust gas recirculation cooler
DE102012021679A1 (en) Internal combustion engine, particularly diesel or Otto cycle engines, has condensate container upstream and downstream adjustable switching valve, and condensate line opens downstream of exhaust gas recirculation conduit into exhaust line
DE102004035324A1 (en) Circuit of register charging and sequential charging
WO2008095214A1 (en) Apparatus for exhaust-gas recirculation for an internal combustion engine
DE202015101888U1 (en) Internal combustion engine with low-pressure exhaust gas recirculation
DE102013003136B4 (en) Method for operating an internal combustion engine and corresponding internal combustion engine
DE102015208475A1 (en) Device for removing condensate from a turbocharger arrangement
DE102015206551B4 (en) Internal combustion engine with low-pressure exhaust gas recirculation and operating method for this

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20160524

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20170814

REG Reference to a national code

Ref country code: DE

Ref legal event code: R003

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20190215