WO2021160411A1 - Moteur à combustion interne pour véhicule automobile, en particulier pour une voiture - Google Patents

Moteur à combustion interne pour véhicule automobile, en particulier pour une voiture Download PDF

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Publication number
WO2021160411A1
WO2021160411A1 PCT/EP2021/051544 EP2021051544W WO2021160411A1 WO 2021160411 A1 WO2021160411 A1 WO 2021160411A1 EP 2021051544 W EP2021051544 W EP 2021051544W WO 2021160411 A1 WO2021160411 A1 WO 2021160411A1
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WO
WIPO (PCT)
Prior art keywords
exhaust gas
internal combustion
combustion engine
gas recirculation
recirculation cooler
Prior art date
Application number
PCT/EP2021/051544
Other languages
German (de)
English (en)
Inventor
Jochen Stoesser
Stephan Bildersheim
Original Assignee
Daimler 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 Daimler Ag filed Critical Daimler Ag
Publication of WO2021160411A1 publication Critical patent/WO2021160411A1/fr

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Classifications

    • 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
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/41—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories characterised by the arrangement of the recirculation passage in relation to the engine, e.g. to cylinder heads, liners, spark plugs or manifolds; characterised by the arrangement of the recirculation passage in relation to specially adapted combustion chambers
    • 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 internal combustion engine for a motor vehicle, in particular for a motor vehicle, according to the preamble of patent claim 1.
  • DE 102009 043 085 A1 discloses an internal combustion engine with an exhaust gas turbocharger and an exhaust gas recirculation system, containing the exhaust gas turbocharger with a turbine arranged in the exhaust gas and a compressor coupled to this, located in an air supply and rotating about a common axis. Furthermore, EP 1 770271 A1 discloses an engine with a plurality of cylinders.
  • JP 2004-116495 A discloses an exhaust gas recirculation cooling system.
  • the object of the present invention is to create an internal combustion engine for a motor vehicle so that the costs of the internal combustion engine can be kept particularly low.
  • the present invention relates to an internal combustion engine, designed for example as a reciprocating piston engine and also referred to as a motor or internal combustion engine, for a motor vehicle, in particular for a motor vehicle designed, for example, as a passenger car or utility vehicle.
  • a motor or internal combustion engine for a motor vehicle, in particular for a motor vehicle designed, for example, as a passenger car or utility vehicle.
  • the motor vehicle in its completely manufactured state has the internal combustion engine and can be driven by means of the internal combustion engine.
  • the internal combustion engine has, for example, a Crankshaft trained output shaft via which the internal combustion engine can provide torque for driving the motor vehicle.
  • the internal combustion engine has at least one motor housing which at least partially delimits at least one, preferably several or all, combustion chambers of the internal combustion engine.
  • combustion processes take place in the combustion chamber, in the course of which a respective fuel-air mixture is burned.
  • the fuel-air mixture also referred to simply as a mixture, comprises, in particular liquid, fuel which is introduced into the combustion chamber, in particular injected directly.
  • the mixture includes air, which is also referred to as combustion air or clean air. The air is guided or introduced into the combustion chamber. Combustion of the respective mixture produces exhaust gas in the combustion chamber.
  • the internal combustion engine has an exhaust system through which the exhaust gas from the combustion chamber can flow and is also referred to as an exhaust tract, which is preferably designed separately from the engine housing.
  • the internal combustion engine has an intake tract through which the aforementioned air can flow and is also referred to as an intake tract, by means of which the air flowing through the intake tract is or is to be guided to and in particular into the combustion chamber.
  • the internal combustion engine has an exhaust gas recirculation device which comprises at least one recirculation line, also referred to as an exhaust gas recirculation line. At least part of the exhaust gas is to be routed from the exhaust system into the intake tract by means of the return line.
  • the exhaust gas from the exhaust system also referred to as the exhaust gas tract
  • the air flowing through the intake tract takes the exhaust gas introduced into the intake tract and thus recirculated by means of the return line with it and transports it, for example, into the combustion chamber.
  • the return line is fluidically connected to the exhaust system at a first connection point and fluidly connected to the intake tract at a second connection point.
  • the first connection point is also referred to as a branch point, since by means of the return line at the branch point at least the aforementioned part of the exhaust gas flowing through the exhaust system can be branched off from the exhaust system and introduced into the return line.
  • the exhaust gas introduced into the recirculation line is led to the second connection point and thus to the inlet tract by means of the recirculation line, with the exhaust gas being fed into the Return line introduced exhaust gas can flow through the return line.
  • the second connection point is also referred to as the inlet point, since at the inlet point the exhaust gas flowing through the return line can flow out of the return line and into the inlet tract or be introduced.
  • the introduction point is preferably arranged upstream of the combustion chamber.
  • a turbine in particular an exhaust gas turbocharger, can be arranged in the exhaust system.
  • the turbine comprises a turbine housing through which the exhaust gas flowing through the exhaust system can flow and a turbine wheel which is rotatably arranged on the turbine housing.
  • the exhaust gas flowing through the turbine housing can drive the turbine wheel and thereby rotate relative to the turbine housing.
  • the exhaust gas is expanded by means of the turbine.
  • the branch point is arranged downstream of the turbine wheel or downstream of the turbine in the flow direction of the exhaust gas flowing through the exhaust system.
  • the exhaust gas recirculation device is a low-pressure exhaust gas recirculation device (LP exhaust gas recirculation device), by means of which an exhaust gas recirculation (EGR), in particular designed as a low pressure exhaust gas recirculation (LP-EGR), can be carried out.
  • EGR exhaust gas recirculation
  • LP-EGR low pressure exhaust gas recirculation
  • the exhaust gas recirculation device also includes at least or precisely one exhaust gas recirculation cooler, which is also referred to as an EGR cooler or simply a cooler.
  • the exhaust gas recirculation cooler is arranged in the recirculation line so that the exhaust gas flowing through the recirculation line and thus recirculated can flow through it, the exhaust gas flowing through the recirculation line or the exhaust gas recirculation cooler, which is recirculated, is to be cooled by means of the exhaust gas recirculation cooler, that is, can be or is cooled.
  • the invention provides that the exhaust gas recirculation cooler is completely spaced from the engine housing and, based on the engine housing and the exhaust system, is held directly on the exhaust system in such a way that no arranged in the flow direction of the exhaust gas flowing through the recirculation line between the branch point and the exhaust gas recirculation cooler, separately from the Exhaust system and formed separately from the exhaust gas recirculation cooler line part of the recirculation line is provided.
  • the invention provides that the exhaust gas recirculation cooler is not positioned fixed to the engine as in conventional solutions, i.e.
  • the exhaust gas recirculation cooler is held directly on the engine housing, but instead the exhaust gas recirculation cooler is held directly on the exhaust system and is completely spaced from the engine housing.
  • the exhaust gas recirculation cooler is positioned fixed to the engine, that is to say held or fastened directly to the engine housing and, for example, at a distance, in particular completely, from the exhaust system.
  • the aforementioned part of the exhaust gas usually first flows through the line part and only then through the exhaust gas recirculation cooler, so that the exhaust gas flowing through the line part is not yet cooled by the exhaust gas recirculation cooler and is therefore an uncooled and therefore very hot exhaust gas.
  • the line part is usually very complex and therefore cost-intensive.
  • any component and assembly tolerances usually have to be compensated for via the already complex line part, which leads to additional costs.
  • the exhaust gas cooler which is in particular formed separately from the exhaust system and arranged in the return line, is held or fastened directly to the exhaust system, the aforementioned line part can be avoided.
  • a line part arranged separately from the exhaust system and separately from the exhaust gas recirculation cooler, arranged in the flow direction of the exhaust gas flowing through the recirculation line, between the exhaust system or the branch point and the exhaust gas recirculation cooler can be avoided, so that the number of parts, the space requirement, the weight and in particular the costs of the Internal combustion engine can be kept in a particularly small frame.
  • the above-described compensation, also referred to as tolerance compensation, of any component and / or assembly tolerances between the exhaust system, in particular the branch point, also referred to as the extraction point, and the Exhaust gas recirculation cooler usually takes place via the previously described, sensitive and usually high temperature-resistant line part, which can have, for example, a corrugated pipe, in particular a corrugated steel pipe and, in particular, a corrugated stainless steel pipe.
  • the line part also has to compensate for large temperature fluctuations, so that high costs arise. This complex and costly line part can now be avoided by the invention, so that the costs can be kept within a particularly low range.
  • the exhaust gas recirculation cooler viewed in the transverse direction of the internal combustion engine, is arranged at least partially, in particular at least predominantly and thus more than half or completely, without overlapping with the engine housing.
  • the exhaust gas recirculation cooler does not overlap at least partially, in particular at least predominantly or completely, in the transverse direction of the internal combustion engine, so that, for example, only a partial area, in particular less than half, of the exhaust gas recirculation cooler or the entire exhaust gas recirculation cooler in the transverse direction is not overlapped or covered by the motor housing.
  • the transverse direction of the internal combustion engine is to be understood in particular as follows:
  • the aforementioned output shaft of the internal combustion engine can be rotated about an axis of rotation relative to the motor housing, the axis of rotation running in the axial direction of the output shaft.
  • the transverse direction of the internal combustion engine the longitudinal direction of which coincides with the axis of rotation or with the axial direction of the output shaft, runs perpendicular to the longitudinal direction, the longitudinal direction and the transverse direction spanning a plane.
  • the plane runs at least substantially horizontally, with the internal combustion engine in its installed position in the fully manufactured state of the motor vehicle, which in its fully manufactured state includes the internal combustion engine.
  • the longitudinal direction runs, for example, in the longitudinal direction of the vehicle, while the transverse direction runs, for example, in the transverse direction of the vehicle.
  • the internal combustion engine is to be installed transversely so that the internal combustion engine is installed transversely in the fully manufactured state of the motor vehicle, for example the longitudinal direction of the internal combustion engine runs in the transverse direction of the vehicle, while the transverse direction of the internal combustion engine runs in the longitudinal direction of the vehicle.
  • the The internal combustion engine also has a vertical direction which runs perpendicular to the longitudinal direction and perpendicular to the transverse direction and thus perpendicular to the aforementioned plane.
  • the vertical direction of the internal combustion engine runs, for example, at least essentially in the vertical direction of the vehicle.
  • the described freedom from overlap, viewed in the transverse direction of the internal combustion engine allows for example excessive, in particular temperature-related, changes in the distance between the exhaust gas recirculation cooler and the engine housing to be avoided, so that excessively costly tolerance compensation measures can be avoided.
  • Another embodiment is characterized in that the exhaust gas recirculation cooler, viewed in the longitudinal direction of the internal combustion engine, is arranged at least partially, in particular at least predominantly and thus more than half or completely, without overlapping with the motor housing.
  • the exhaust gas recirculation cooler does not overlap at least partially, in particular at least predominantly or completely, in the longitudinal direction of the internal combustion engine, so that, for example, the exhaust gas recirculation cooler only partially, in particular less than half or not at all, overlaps through the engine housing in the longitudinal direction of the internal combustion engine or is covered.
  • excessive, for example temperature-related, changes in the aforementioned distance and / or a further distance between the exhaust gas recirculation cooler and the engine housing can be avoided, so that excessively cost-intensive tolerance compensation measures can be avoided.
  • the housing has at least one cylinder, by means of which the combustion chamber is delimited, in particular directly, in the radial direction of the cylinder.
  • the motor housing is thus preferably a cylinder housing, in particular a cylinder crankcase.
  • the internal combustion engine has at least one cylinder head which is formed separately from the engine housing and connected to the engine housing and which forms or has a combustion chamber roof assigned to the combustion chamber, through which the combustion chamber is delimited in the axial direction of the cylinder.
  • the exhaust gas recirculation cooler viewed in the transverse direction and / or in the longitudinal direction of the internal combustion engine, at least partially, in particular at least predominantly and thus more than is arranged half or completely, without overlapping to the cylinder head.
  • the exhaust system has an exhaust manifold formed separately from the engine housing and separately from the cylinder head and connected to the cylinder head and through which the exhaust gas from the combustion chamber can flow.
  • the cylinder head forms, for example, at least one outlet channel assigned to the combustion chamber, via which the exhaust gas can be discharged from the combustion chamber.
  • the exhaust gas from the combustion chamber can thus flow through the exhaust duct.
  • the outlet channel can be or is fluidically connected to the combustion chamber, in particular via an outlet valve assigned to the outlet channel.
  • the exhaust manifold in particular its interior, is fluidically connected or connectable to the exhaust duct so that the exhaust gas flowing through the exhaust duct can flow out of the exhaust duct and into the exhaust manifold and subsequently flow through the exhaust manifold.
  • the outlet ducts open into the interior of the exhaust manifold, for example, so that the plurality of outlet ducts and thus the exhaust gas from the plurality of outlet ducts can be brought together or are brought together in the exhaust manifold or by means of the exhaust manifold.
  • the exhaust gas recirculation cooler viewed in the transverse direction and / or in the longitudinal direction and / or in the vertical direction of the internal combustion engine at least partially, in particular at least predominantly and thus more than half or completely , is arranged without overlapping to the exhaust manifold.
  • the exhaust gas recirculation cooler is arranged in the vertical direction of the internal combustion engine above the exhaust system, so that, for example, the exhaust gas recirculation cooler in the vertical direction of the internal combustion engine downwards or towards the Indicating exhaust system is at least partially overlapped or covered by the exhaust system.
  • the return line is at least one downstream of the exhaust gas recirculation cooler in the flow direction of the exhaust gas flowing through the return line and thus the exhaust gas recirculation cooler and thus by means of the of the exhaust gas recirculation cooler has already cooled exhaust gas flow through line element, which can preferably be formed separately from the exhaust manifold and / or separately from the intake tract.
  • the line element is in each case at least indirectly, in particular directly, in particular mechanically and / or fluidly connected on the one hand to the exhaust gas recirculation cooler and on the other hand to the intake tract, so that the exhaust gas coming from the exhaust gas recirculation cooler and cooled by the exhaust gas recirculation cooler via the line element to and in particular into the intake tract can be performed.
  • the line element has at least one compensation element, by means of which, in particular temperature-related and / or at least in the longitudinal direction of the line element, changes in a distance between the exhaust gas recirculation cooler and the engine housing and / or tolerances such as assembly and / or Component tolerances and / or temperature-related tolerances can be compensated.
  • the compensation element also referred to as a compensation element, is non-destructive, in particular in the direction of longitudinal extent of the line element, that is, its length can be reversibly changed.
  • the compensating element can be deformed, in particular reversibly or without interference or elastically.
  • the compensating element allows these relative movements or changes, in particular such that at least a part of the compensation element with the exhaust gas recirculation cooler moves relative to the engine housing or vice versa, without the compensation element being damaged or destroyed.
  • tolerances between the exhaust gas recirculation cooler and the motor housing or the changes in the distance between the exhaust gas recirculation cooler and the motor housing are also to be understood as tolerances or a distance between the exhaust gas recirculation cooler and the intake tract, since these usually go hand in hand with one another.
  • the line element is arranged downstream of the exhaust gas recirculation cooler and consequently exhaust gas cooled by means of the exhaust gas recirculation cooler can flow through it, tolerances and / or changes in position, in particular by non-destructive changes in length of the compensating element, can be compensated particularly well, simply and inexpensively by means of the line element, in particular by means of the compensation element.
  • the compensating element is formed from a flexible or elastically deformable material and / or has a bellows and / or a corrugated pipe, in particular a corrugated metal pipe.
  • the compensating element can lengthen and shorten in the event of tolerances or changes in position, in particular between the exhaust gas recirculation cooler and the engine housing or the intake duct, so that changes in tolerance and position can be compensated for easily and inexpensively.
  • the line element is arranged downstream of the exhaust gas recirculation cooler and through which exhaust gas cooled by means of the exhaust gas recirculation cooler can flow, particularly thermal loads on the line element and in particular the compensating element can be kept particularly low, so that, for example, failures of the line element, in particular the compensating element, for example due to excessive tolerances can be avoided.
  • This embodiment is based in particular on the knowledge that component and assembly tolerances can be better compensated for by means of the cold or cold exhaust gas through flowable and, for example, flexible line elements than by means of the aforementioned line part through which hot exhaust gas can flow.
  • Fig. 1 is a schematic representation of an inventive
  • FIG. 2 shows a fragmentary schematic perspective view of FIG
  • an internal combustion engine 10 also referred to as a motor or internal combustion engine
  • a motor vehicle configured, for example, as a motor vehicle, in particular as a passenger vehicle or utility vehicle.
  • the motor vehicle has the internal combustion engine 10 in its completely manufactured state and can be driven by means of the internal combustion engine 10.
  • Internal combustion engine 10 is designed as a reciprocating piston engine and has at least one motor housing 12, which can be designed, for example, as a cylinder housing, in particular as a cylinder crankcase.
  • the internal combustion engine 10 is shown in FIG. 1 in a schematic plan view.
  • the engine housing 12, which is also referred to as an engine block has a plurality of cylinders 14, each of which partially delimits a combustion chamber 16 of the internal combustion engine 10.
  • the respective combustion chamber 16 is delimited in the radial direction of the respective cylinder 14 by the respective cylinder 14, in particular by its cylinder wall 18, in particular directly.
  • fuel in particular liquid fuel
  • air are introduced into the respective combustion chamber 16, so that a fuel-air mixture, also referred to simply as a mixture, is produced in the respective combustion chamber.
  • the mixture comprises the fuel and the air which are introduced into the respective combustion chamber 16.
  • the fuel is injected directly into the combustion chamber 16.
  • the respective mixture is burned, resulting in exhaust gas in the respective combustion chamber 16.
  • the internal combustion engine 10 can have a manifold which cannot be seen in the figures and which is also referred to as an exhaust manifold.
  • the manifold in particular its interior, can be flowed through by the exhaust gas from the or all combustion chambers 16 or cylinders 14 of the engine housing 12, so that the cylinders 14 or the exhaust gas from the cylinders 14 or from the combustion chambers 16 are brought together through the manifold or in the manifold respectively become.
  • the exhaust gas from the combustion chambers 16 can collect in the manifold, in particular in its interior.
  • the exhaust manifold is designed separately from the engine housing 12.
  • the internal combustion engine 10 also has an exhaust system 20, which is designed in particular separately from the motor housing 12 and is also referred to as an exhaust tract, through which the exhaust gas from the combustion chambers 16 can flow.
  • the internal combustion engine 10 also has an inlet duct 24 through which the aforementioned air can flow, by means of which the air flowing through the inlet duct 24 is guided to and in particular into the combustion chambers 16.
  • a clean air line 26 of the intake tract 24 through which air can flow can be seen.
  • the inlet duct 24 can have an air filter which is arranged upstream of the clean air line 26 in the direction of flow of the air flowing through the inlet duct 24.
  • An unfiltered air line can be arranged upstream of the air filter, through which the air that has not yet been filtered by means of the air filter can flow.
  • the air flowing through the intake tract 24 is filtered by means of the air filter, the air filtered by the air filter flowing through the clean air line 26 and being guided to and into the combustion chambers 16 by means of the clean air line 26.
  • the internal combustion engine 10 can comprise at least or precisely one exhaust gas turbocharger, which cannot be seen in the figures, which can have a turbine arranged in the exhaust gas tract (exhaust system 20) and a compressor arranged in the intake tract 24.
  • the turbine has a turbine housing and a turbine wheel which can be rotated relative to the turbine housing and by which exhaust gas flowing through the turbine housing can be driven and thereby rotatable relative to the turbine housing.
  • a compressor wheel is connected to the turbine wheel via a shaft drivable.
  • the compressor wheel of the compressor arranged in the inlet duct 24 the air flowing through the inlet duct 24 can be compressed.
  • the combustion chambers 16 are supplied with the compressed air.
  • the internal combustion engine 10 also has an exhaust gas recirculation device 28, by means of which exhaust gas recirculation (EGR) can be carried out.
  • EGR exhaust gas recirculation
  • Exhaust gas recirculation is understood to mean that by means of the exhaust gas recirculation device 28, at least part of the exhaust gas flowing through the exhaust system 20 is branched off from the exhaust system 20 and guided to the intake tract 24 and introduced into the intake tract 24.
  • the exhaust gas recirculation device 28 comprises at least or precisely one recirculation line 30, which is formed, for example, separately from the exhaust system 20 and separately from the motor housing 12 and separately from the intake tract 24.
  • the return line 30 is fluidically connected to the exhaust system 20 at a branch point and fluidically connected to the inlet tract 24, in particular to the clean air line 26, at an inlet point.
  • the branch point is designated by A in FIG. 1, while the discharge point is designated by E in FIG.
  • At the branch point A at least the aforementioned part of the exhaust gas can be branched off from the exhaust system 20 by means of the return line 30 and introduced into the return line 30.
  • the exhaust gas introduced into the return line 30 can flow through the return line 30 and is guided from the branch point A to the introduction point E by means of the return line 30.
  • the exhaust gas flowing through the return line 30 can flow out of the return line 30 and flow into the inlet tract 24, in particular into the clean air line 26.
  • the air flowing through the clean air line 26 takes the exhaust gas that is introduced into the clean air line 26 at the inlet point E and transports the exhaust gas introduced into the clean air line 26 at the inlet point E into the combustion chambers 16.
  • the mentioned part of the exhaust gas from the exhaust system 20 to and in particular into the intake tract 24 is referred to as exhaust gas recirculation, so that the exhaust gas that is introduced into the intake tract 24 at the introduction point E is referred to as recirculated exhaust gas.
  • the recirculation device 28 also has at least or precisely one exhaust gas recirculation cooler 32, which is arranged, for example, in the recirculation line 30 and consequently can be traversed by the exhaust gas flowing through the recirculation line 30.
  • the exhaust gas to be recirculated can flow through the exhaust gas recirculation cooler 32, with the exhaust gas, which is branched off from the exhaust system 20 at branch point A and is introduced into the inlet duct 24 at the inlet point E, to be cooled or cooled by means of the exhaust gas recirculation cooler 32.
  • the exhaust gas flowing through the recirculation line 30 is cooled by means of the exhaust gas recirculation cooler 32.
  • the exhaust gas recirculation cooler 32 is preferably formed separately from the exhaust system 20 and separately from the inlet duct 24 and separately from the motor housing 12, whereby it is preferably also provided that the exhaust gas recirculation cooler 32 is formed separately from the recirculation line 30.
  • the recirculation device 28 also has a valve element 34, which is also referred to as an exhaust gas recirculation valve (EGR valve).
  • EGR valve is arranged, for example, in the recirculation line 30, whereby it is preferably provided that the EGR valve is arranged downstream of the exhaust gas recirculation cooler 32 and preferably upstream of the inlet point E in the flow direction of the exhaust gas flowing through the recirculation line 30.
  • the exhaust gas recirculation cooler 32 is completely spaced from the engine housing 12 and preferably also completely from the inlet duct 24, the exhaust gas recirculation cooler 28, based on the engine housing 12 and the exhaust system 20 and preferably the intake tract 24 is also held directly on the exhaust system 20 exclusively.
  • a line part of the recirculation line 30 that is formed separately from the exhaust gas recirculation cooler 32 and separately from the exhaust system 20, upstream of the exhaust gas recirculation cooler 32 and downstream of the branch point A can be avoided.
  • the line part Since the exhaust gas that has not yet been cooled by means of the exhaust gas recirculation cooler 32 would flow through this line part, the line part would be subjected to high thermal loads. In addition, the line part would then have to be used in order to compensate or compensate for tolerances such as component and assembly tolerances and / or, in particular thermally induced, changes in position of the exhaust gas recirculation cooler 32 relative to the exhaust system 20. As a result, the line part would be very complex and costly, and the line part can now be avoided.
  • the return line 30 has a line element 36 which is arranged downstream of the exhaust gas recirculation cooler 32 and upstream of the inlet point E or upstream of the inlet tract 24 in the flow direction of the exhaust gas flowing through the return line 30.
  • the line element 36 is formed separately from the exhaust gas recirculation cooler 32 and / or separately from the inlet duct 24. Since the line element 36 is arranged downstream of the exhaust gas recirculation cooler 32, the exhaust gas which flows through the line element 36 is by means of the Exhaust gas recirculation cooler 32 is cooled and therefore cold.
  • the line element 36 is used to compensate for tolerances such as component and / or assembly tolerances and / or changes in position of the exhaust gas recirculation cooler 32 relative to the engine housing 12 and / or relative to the inlet duct 24.
  • tolerances such as component and / or assembly tolerances and / or changes in position of the exhaust gas recirculation cooler 32 relative to the engine housing 12 and / or relative to the inlet duct 24.
  • this can now be done in a particularly simple and inexpensive manner, since the conduit element 36 has the cooled exhaust gas flowing through it.
  • the internal combustion engine 10 has an output shaft designed, for example, as a crankshaft, which is rotatable about an axis of rotation relative to the motor housing 12.
  • the axis of rotation runs in the axial direction of the output shaft, the axial direction of the output shaft coinciding with a longitudinal direction of the internal combustion engine 10 illustrated in FIG. 1 by a double arrow 38.
  • the motor vehicle also has a transmission 40, the input shaft of which can be driven, for example, by the output shaft.
  • the transmission 40 adjoins the motor housing 12 or the internal combustion engine 10 in the longitudinal direction of the internal combustion engine 10.
  • the motor vehicle can be driven by the internal combustion engine 10, in particular by the output shaft, via the transmission 40.
  • the exhaust gas recirculation cooler 32 is also completely spaced from the transmission 40 and is held directly on the exhaust system 20 exclusively in relation to the engine housing 12, the intake tract 24, the transmission 40 and the exhaust system 20.
  • a double arrow 42 illustrates one or the transverse direction of the internal combustion engine 10, the transverse direction running perpendicular to the longitudinal direction.
  • the longitudinal direction and the transverse direction span a plane which, in the fully manufactured state of the motor vehicle, runs perpendicular to the vertical direction of the vehicle or at least substantially horizontally. It is provided in particular that at least a part of the exhaust system 20 and / or the exhaust manifold adjoins the motor housing 12 in the transverse direction of the internal combustion engine 10.
  • the exhaust gas recirculation cooler 32 in the transverse direction and / or in the longitudinal direction of the Internal combustion engine 10, viewed at least partially, in particular at least predominantly or completely, can be arranged without overlapping with respect to the motor housing 12. It is also conceivable that the exhaust gas recirculation cooler 32, viewed in the transverse direction and / or longitudinal direction of the internal combustion engine 10, is arranged at least partially, in particular at least predominantly or completely, without overlapping with a cylinder head of the internal combustion engine 10 (not shown in the figures). The cylinder head is designed separately from the motor housing 12 and, in particular, directly connected to the motor housing 12.
  • the cylinder head adjoins the motor housing 12 in the vertical direction of the internal combustion engine 10 upwards.
  • the cylinder head forms a combustion chamber roof for each combustion chamber 16, by means of which the respective combustion chamber 16 is delimited in the axial direction of the cylinder 14, in particular towards the cylinder head.
  • the respective combustion chamber 16 is delimited, for example, by the piston.
  • the exhaust gas recirculation cooler 32 can be arranged above the exhaust system 20 in the vertical direction of the internal combustion engine 10.
  • the vertical direction of the internal combustion engine 10 is illustrated in FIG. 1 by a double arrow 44, the vertical direction running perpendicular to the aforementioned plane.
  • the exhaust gas recirculation cooler 32 is designed as an exhaust gas liquid cooler.
  • the exhaust gas recirculation cooler 32 can be flowed through by a liquid functioning as a cooling liquid, which liquid at least partially, in particular at least predominantly or exclusively, comprises water and can therefore also be referred to as cooling water.
  • a liquid functioning as a cooling liquid which liquid at least partially, in particular at least predominantly or exclusively, comprises water and can therefore also be referred to as cooling water.
  • heat can be transferred from the exhaust gas flowing through the exhaust gas recirculation cooler 32 to the cooling water (cooling liquid) flowing through the exhaust gas recirculation cooler 32, whereby the exhaust gas flowing through the exhaust gas recirculation cooler 32 is cooled.
  • the line element 36 can have at least one compensating element 46, shown particularly schematically in FIG. 1, by means of which, for example, tolerances such as component and / or assembly tolerances, in particular with regard to a position of the exhaust gas recirculation cooler 32 relative to the inlet duct 24 and / or relative to the engine housing 12 can be compensated or balanced.
  • the compensation element 46 relative movements between the exhaust gas recirculation cooler 32 and the intake tract 24 and / or between the exhaust gas recirculation cooler 32 and the engine housing 12, for which purpose the compensating element 46, for example, allows or implements these relative movements.
  • the compensating element 46 is made of a flexible, that is, for example, elastically deformable and / or non-destructively deformable, material and / or the compensating element 46 has a bellows made, for example, of metal and / or a bellows made, for example, of metal, in particular a steel Corrugated pipe on.
  • the internal combustion engine 10 can be manufactured in a particularly simple and cost-effective manner.
  • the exhaust gas recirculation cooler 32 is assigned cooling lines 43 and 45 through which the cooling liquid can flow.
  • the cooling liquid is guided to the exhaust gas recirculation cooler 32 by means of the cooling line 45.
  • the cooling liquid can then flow through the exhaust gas recirculation cooler 32 and thereby cool the exhaust gas via the exhaust gas recirculation cooler 32.
  • the cooling line 43 for example, the cooling water or the cooling liquid is carried away from the exhaust gas recirculation cooler 32.
  • the aforementioned changes in position or tolerances can be compensated for - by means of the cold line element 36 - and, for example, by the cooling lines 43 and 45, which can also each have at least one compensation element.
  • the previous and following statements on the compensation element 46 can easily be transferred to the respective compensation element of the respective cooling line 43 or 45, and vice versa.
  • the compensation element or the respective cooling line 43 or 45 can be made from a flexible one Material be formed, whereby the tolerances or changes in the distance can be compensated for without destruction and damage.

Landscapes

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

Abstract

L'invention concerne un moteur à combustion interne (10) pour un véhicule automobile, comprenant : un carter de moteur (12) qui délimite au moins partiellement au moins une chambre de combustion (16) du moteur à combustion interne (10) ; un système de gaz d'échappement (20), à travers lequel un gaz d'échappement provenant de la chambre de combustion (16) peut s'écouler ; un conduit d'admission (24), à travers lequel de l'air peut s'écouler et au moyen duquel l'air s'écoulant à travers le conduit d'admission (24) peut être amené dans la chambre de combustion (16) ; et un dispositif de recirculation de gaz d'échappement (28), qui présente au moins une conduite de recirculation (30), au moyen de laquelle au moins une partie du gaz d'échappement peut être amené à partir du système de gaz d'échappement (20) dans le conduit d'admission (24), et au moins un refroidisseur de recirculation des gaz d'échappement (32), à travers lequel un gaz d'échappement s'écoulant à travers la conduite de recirculation (30) peut s'écouler et au moyen duquel le gaz d'échappement s'écoulant à travers la conduite de recirculation (30) peut être refroidi, le refroidisseur de recirculation de gaz d'échappement (32) étant entièrement espacé du carter de moteur (12) et, par rapport au carter de moteur (12) et au système de gaz d'échappement (20), étant directement retenu exclusivement sur le système de gaz d'échappement (20).
PCT/EP2021/051544 2020-02-14 2021-01-25 Moteur à combustion interne pour véhicule automobile, en particulier pour une voiture WO2021160411A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020000965.4 2020-02-14
DE102020000965.4A DE102020000965A1 (de) 2020-02-14 2020-02-14 Verbrennungskraftmaschine für ein Kraftfahrzeug, insbesondere für einen Kraftwagen

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WO2021160411A1 true WO2021160411A1 (fr) 2021-08-19

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DE (1) DE102020000965A1 (fr)
WO (1) WO2021160411A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011954A1 (de) 2000-03-11 2001-09-13 Modine Mfg Co Abgaswärmetauscher in einer Abgasrückführungsanordnung
JP2004116495A (ja) 2002-09-30 2004-04-15 Sankei Giken Kogyo Co Ltd Ｅｇｒガス冷却装置
EP1770271A1 (fr) 2005-09-28 2007-04-04 Kubota Corporation Moteur à combustion interne avec plusieures cylindres et refroidisseur de recirculation de gaz d'échappement
FR2923535A1 (fr) * 2007-11-13 2009-05-15 Renault Sas Systeme d'echappement pour un moteur avec recirculation des gaz d'echappement et vehicule automobile comportant un tel systeme.
DE102009043085A1 (de) 2009-09-25 2011-08-04 Volkswagen AG, 38440 Brennkraftmaschine mit einem Abgasturbolader und einem Abgasrückführsystem
EP3418548A1 (fr) * 2016-07-27 2018-12-26 Mazda Motor Corporation Dispositif de système d'échappement de véhicule
US20190170034A1 (en) * 2017-12-04 2019-06-06 Faurecia Systemes D'echappement Compact device for purification and recirculation of exhaust gas

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011954A1 (de) 2000-03-11 2001-09-13 Modine Mfg Co Abgaswärmetauscher in einer Abgasrückführungsanordnung
JP2004116495A (ja) 2002-09-30 2004-04-15 Sankei Giken Kogyo Co Ltd Ｅｇｒガス冷却装置
EP1770271A1 (fr) 2005-09-28 2007-04-04 Kubota Corporation Moteur à combustion interne avec plusieures cylindres et refroidisseur de recirculation de gaz d'échappement
FR2923535A1 (fr) * 2007-11-13 2009-05-15 Renault Sas Systeme d'echappement pour un moteur avec recirculation des gaz d'echappement et vehicule automobile comportant un tel systeme.
DE102009043085A1 (de) 2009-09-25 2011-08-04 Volkswagen AG, 38440 Brennkraftmaschine mit einem Abgasturbolader und einem Abgasrückführsystem
EP3418548A1 (fr) * 2016-07-27 2018-12-26 Mazda Motor Corporation Dispositif de système d'échappement de véhicule
US20190170034A1 (en) * 2017-12-04 2019-06-06 Faurecia Systemes D'echappement Compact device for purification and recirculation of exhaust gas

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