EP1870591B1 - Dispositif d'admission pour un moteur à combustion interne - Google Patents

Dispositif d'admission pour un moteur à combustion interne Download PDF

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Publication number
EP1870591B1
EP1870591B1 EP07118191A EP07118191A EP1870591B1 EP 1870591 B1 EP1870591 B1 EP 1870591B1 EP 07118191 A EP07118191 A EP 07118191A EP 07118191 A EP07118191 A EP 07118191A EP 1870591 B1 EP1870591 B1 EP 1870591B1
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EP
European Patent Office
Prior art keywords
distributor
exhaust gas
fresh gas
outlet
canal
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.)
Expired - Fee Related
Application number
EP07118191A
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German (de)
English (en)
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EP1870591A3 (fr
EP1870591A2 (fr
Inventor
Andreas GRÜNER
Robert Sendor
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Mahle Filtersysteme GmbH
Original Assignee
Mahle Filtersysteme GmbH
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Publication of EP1870591A3 publication Critical patent/EP1870591A3/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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/112—Intake manifolds for engines with cylinders all in one line
    • 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
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings 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
    • F02M26/17—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
    • F02M26/21—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 with EGR valves located at or near the connection 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
    • F02M26/23—Layout, e.g. schematics
    • F02M26/25—Layout, e.g. schematics with coolers having bypasses
    • 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
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—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
    • F02M26/42—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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026—Plenum chambers
    • F02M35/10052—Plenum chambers special shapes or arrangements of plenum chambers; Constructional details
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10144—Connections of intake ducts to each other or to another device
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10288—Air intakes combined with another engine part, e.g. cylinder head cover or being cast in one piece with the exhaust manifold, cylinder head or engine block
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10354—Joining multiple sections together
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/1045—Intake manifolds characterised by the charge distribution between the cylinders/combustion chambers or its homogenisation
    • 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

Definitions

  • the present invention relates to an intake system for an internal combustion engine, in particular in a motor vehicle, having the features of the preamble of claim 1.
  • An intake system is used to supply fresh gas to cylinders of the internal combustion engine.
  • an intake system for a plurality of cylinders has a common fresh gas distributor, which receives the fresh gas on the input side from a single supply pipe and supplies on the output side the assigned cylinders or distributes them to them.
  • the fresh gas distributor for each associated cylinder has at least one fresh gas outlet, which communicates with a corresponding fresh gas inlet in the assembled state of the intake system, which is formed in the engine block of the internal combustion engine and leads to the combustion chamber of the respective cylinder.
  • Modern internal combustion engines can be equipped with an exhaust gas recirculation device, hereinafter referred to as an EGR device, which, at least in the case of certain operating states of the internal combustion engine, supplies a partial flow of the exhaust gases from the exhaust gas system the internal combustion engine branches off and leads back into the fresh gas supplied to the internal combustion engine.
  • the exhaust gas recirculation takes place relatively far upstream of the fresh gas outlets and, in particular, upstream of the fresh gas distributor in order to achieve the best possible thorough mixing of the exhaust gases with the fresh gas up to the fresh gas outlets.
  • the exhaust gas recirculation system for introducing the exhaust gases into the intake system is connected to the aforementioned feed pipe, which leads into the fresh gas distributor. With the help of a fuel return can be reduced for certain operating conditions of the internal combustion engine whose pollutant emission.
  • an intake system of the aforementioned type is known in which a fresh gas distributor is provided which serves for supplying fresh gas to a plurality of the fresh gas distributor associated cylinders of the internal combustion engine and which has at least one fresh gas outlet for each associated cylinder, which are arranged side by side.
  • a distribution channel of an exhaust gas recirculation device is provided on the fresh gas distributor, which is arranged adjacent to all fresh gas exits of the fresh gas distributor and communicates with the fresh gas distributor.
  • suction systems with exhaust gas recirculation devices are eg in the US 5, 957, 116 or the EP 1 164 280 disclosed.
  • the present invention is concerned with the problem of providing for an intake system of the type mentioned an improved embodiment, for example, allows a compact design and / or advantageous for the performance and / or emissions of the internal combustion engine effects.
  • the present invention is based on the general idea of introducing the exhaust gases as close as possible to all fresh gas exits of the fresh gas distributor in the intake system.
  • the invention uses a distribution channel which is arranged on the fresh gas distributor so that it extends along all Frischgasaustritte associated with this fresh gas distributor. That is, in the fresh gas outlets, which are arranged adjacent to each other in a row next to each other, the distribution channel extends from the first to the last fresh gas outlet of this series.
  • the recirculated exhaust gases can be introduced through the distribution channel immediately upstream of each individual fresh gas outlet in the fresh gas distributor. Since the recirculated exhaust gas is distributed to the individual fresh gas outlets, each results in a sufficient mixing between the fresh gas and recirculated exhaust gas for each cylinder.
  • the exhaust gas recirculation device has a switching valve with an input and two outputs, wherein the input of the switching valve is connected to an exhaust gas recirculation valve or to an exhaust gas supply line of the exhaust gas recirculation device, while the first output of the switching valve is connected to the distribution channel and the second output of Switching valve is connected to an exhaust gas inlet of an exhaust gas cooler of the exhaust gas recirculation device. Furthermore, an exhaust gas outlet of the exhaust gas cooler is connected separately and at a distance from the first output of the switching valve to the same or to another distribution channel.
  • the distribution channel has a U-profile, whose open side is directed away from the interior of the fresh gas distributor and communicates through U-base of the distribution channel with the fresh gas distributor.
  • This design results in a particularly compact design for the intake system with exhaust gas recirculation. Due to the spaced arrangement on the one hand of the exhaust outlet of the exhaust gas cooler and on the other hand, the first output of the switching valve in particular the compact design is supported, at the same time with the help of the distribution channel sufficient homogenization of cooled and non-cooled recirculated exhaust gases can be achieved.
  • the distribution channel can communicate with the fresh gas distributor through a plurality of separate return openings, the return openings being selectively positioned along the distribution channel with respect to the cylinder associated with the fresh gas distributor, preferably in view of a short flow path from the respective return opening to the selected cylinder.
  • a modern fresh gas distributor can have, for each cylinder assigned to it, two juxtaposed fresh gas outlets, namely one main outlet and one secondary outlet each. With the help of two fresh gas outlets per cylinder, it is possible to produce a layer charge in the respective cylinder or in its separation space, wherein, for example, working with a swirl flow and / or with a Tumbleströmung. Appropriately, the side exit can be additionally controlled. Such a layer loading technique is well known and therefore need not be explained in detail.
  • the return openings along the distribution channel can now be selectively positioned with respect to the main outlets or with respect to the side outlets, in particular with regard to a short flow path from the respective return opening from the selected exit.
  • This construction means that the recirculated exhaust gas leaves the fresh gas distributor essentially only through the respectively predetermined outlet.
  • targeted predetermined areas can be supplied with an exhaust-fresh gas mixture, while the remaining combustion chamber volume is filled essentially exclusively with fresh gas.
  • this locally concentrated exhaust gas recirculation the operating behavior of the internal combustion engine, in particular fuel consumption and / or pollutant emission can be positively influenced.
  • Fig. 1 and 2 comprises an intake system 1 according to the invention at least one fresh gas distributor 2, which is assigned to a plurality of cylinders of an internal combustion engine, not shown here, which may be arranged in particular in a motor vehicle.
  • the fresh gas distributor 2 is connected on the input side to a feed pipe 3, which feeds the fresh gas distributor 2, sucked by the internal combustion engine or driven by a supercharger fresh air.
  • a part of the feed tube 3 forms an integral part of the fresh gas distributor 2.
  • the distribution of the supplied fresh gas to the cylinder assigned to the fresh gas distributor 2 now takes place.
  • the fresh gas distributor 2 has at least one fresh gas outlet 4 for each cylinder assigned to it.
  • the fresh gas distributor 2 has two fresh gas outlets for each cylinder, namely a main outlet 4a and a secondary outlet 4b.
  • This is a special embodiment which works with a stratified charging technique, eg in conjunction with a swirl and / or tumble flow.
  • the fresh gas distributor 2 shown here is thus associated with four cylinders, which are arranged in series. If the internal combustion engine is a four-cylinder engine, the intake system 1 comes with the fresh gas distributor 2 shown. However, if the internal combustion engine is a V8 engine, each having four cylinders in two cylinder banks, the fresh gas distributor 2 shown here is assigned to a cylinder bank, so that the intake system 1 has a further, not shown here, essentially mirror-symmetrical constructed fresh gas distributor 2 has.
  • the fresh gas outlets 4 are arranged side by side and lie substantially in one plane. In this level, the connection of the fresh gas distributor 2 to the engine block of the internal combustion engine takes place.
  • the fresh gas distributor 2 is provided in the plane of the fresh gas outlets 4 with a flange 5, which has a flange section 6 with two through openings 7 for each cylinder. Through the through holes 7, each flange 6 can be bolted to the engine block top and bottom. Also, the flange 5 is suitably integrally integrated in the fresh gas distributor 2.
  • the Fig. 1 and 2 are also essential components of an exhaust gas recirculation device 8 can be removed, in particular an exhaust gas cooler 9, a switching valve 10 and an exhaust gas recirculation valve 11, hereinafter referred to as EGR valve 11 comprises.
  • the fresh gas distributor 2 is also provided with a distribution channel 12, which is indeed arranged or formed on the fresh gas distributor 2, but at least functionally forms part of the EGR device 8.
  • the distribution channel 12 is positioned on the fresh gas distributor 2 so that it is adjacent to all fresh gas outlets 4 of the fresh gas distributor 2 is arranged.
  • the long stretched distribution channel 12 extends parallel to the plane of the fresh gas outlets 4.
  • the arrangement of the distribution channel 12 takes place as close as possible to the fresh gas outlets 4.
  • the distribution channel 2 is arranged with its outlet side immediately upstream of outlet funnels 13, which are formed in the fresh gas distributor 2, and converge respectively to a fresh gas outlet 4 and to a pair of associated outlets 4a and 4b.
  • the distribution channel 12 communicates with the fresh gas distributor 2.
  • the distribution channel 12 contains at its outlet side, for example, a plurality of return openings 14 through which the interior of the distribution channel 12 is fluidically connected to the interior of the fresh gas distributor 2.
  • a plurality of separate return openings 14 are provided for communication between distribution channel 12 and fresh gas distributor 2, which is positioned cylinder-selectively along the distribution channel 12. This means that each return opening 14 is positioned immediately upstream of the respectively associated fresh gas outlet 4. This results in a possible short flow path from the respective return opening 14 to the respective fresh gas outlet 4 and thus to the respective selected cylinder.
  • two return openings 14 are each assigned to one cylinder.
  • the same cylinder associated return openings 14 are according to Fig. 3 for example, aligned centrally to the associated outlet funnel.
  • each cylinder is assigned a main outlet 4a and a secondary outlet 4b
  • the positioning of the separately configured return openings 14 in a particular embodiment of the suction system 1 according to the invention can also take place selectively with respect to the main outlets 4a or alternatively with respect to the secondary outlets 4b.
  • the positioning is then expediently optimized with regard to the shortest possible flow path from the respective return opening 14 to the respectively selected main outlet 4a or secondary outlet 4b.
  • the return openings 14 supplied to the respective outlet 4a, 4b are then arranged centrally with respect to the associated outlet 4a, 4b.
  • the cylinder-selective or the outlet-selective positioning of the return openings 14 each represent particular embodiments of the present invention.
  • the outlet side of the distribution channel 12 can also be equipped so that over the entire length of the distribution channel 12 forms a substantially uniform exhaust gas recirculation in the exhaust manifold 2 ,
  • individual return openings 14 in the outlet side can also be provided to form the outlet side by a porous wall or the like.
  • the distribution channel 12 is integrally integrated into the fresh gas distributor 2, that is, the distribution channel 12 forms an integral part of the fresh gas distributor 2.
  • the distribution channel 12 has a U-profile in cross section, which has an open side 15 directed away from the interior of the fresh gas distributor 2 and a U base 16 facing the interior of the fresh gas distributor 2.
  • the U-base 16 Through the U-base 16, the communication between distribution channel 12 and fresh gas distributor 2 takes place. In the present case, this means that the return openings 14 are formed in the U-base 16.
  • the open side 15 of the distribution channel 12 is closed here by means of a cover plate 17.
  • the cover plate 17 is screwed here to the fresh gas distributor 2, which is indicated by screws 18.
  • screws 18 are on the cover plate 17 laterally projecting eyes 19 formed, which are penetrated by the respective screws 18.
  • the switching valve 10 of the EGR device 8 has an input 20 and two outputs, namely a first output 21 and a second output 22.
  • the input 20 is here directly connected to an output side 23 of the EGR valve 11, whose input side 24 to one here not shown exhaust gas supply line of the EGR device 8 is connected, which in turn leads to the exhaust gas sampling point on the exhaust gas tract of the internal combustion engine.
  • the input 20 is indirectly connected to the exhaust gas supply line in which the EGR valve 11 is arranged.
  • the first output 21 of the switching valve 10 is here connected directly to the distribution channel 12, through the cover plate 17 therethrough.
  • the cover plate 17 is made in one piece together with a housing 25 of the switching valve 10, that is, the cover plate 17 is integrated into the housing 25.
  • the housing 25 together with the cover plate 17 as a cast component, in particular made of plastic or metal.
  • the second output 22 of the switching valve 10 is connected to an exhaust gas inlet 26 of the exhaust gas cooler 9.
  • An exhaust gas outlet 27 of the exhaust gas cooler 9 is also connected to the distribution channel 12 through the cover plate 17. in the Inside the exhaust gas cooler 9, an exhaust path leads from the exhaust gas inlet 26 to the exhaust gas outlet 27.
  • the switching valve 10 can now be switched at least between two switching positions.
  • first end position is a valve body 28 of the switching valve 10 in a valve seat 29, which is arranged in the region of the first output 21, so that in this first end position, the first output 21 is closed, while the second output 22 is open.
  • the input 20 is connected to the second output 22 in the switching valve 10 in a first switching position, so that the exhaust gases supplied via the EGR valve 11 flow through the exhaust gas cooler 9 and enter through the exhaust gas outlet 27 into the distribution channel 12.
  • the recirculated exhaust gases are cooled before they enter the fresh gas distributor 2.
  • Exhaust gas cooling may be advantageous with regard to the combustion behavior and the power development of the internal combustion engine.
  • the switching valve 10 has a second switching position in which the valve body 28 is more or less lifted from its seat 29 and thus releases the first output 21.
  • the valve body 28 can block the connection between the input and the second output 22.
  • the recirculated exhaust gases thus flow from the input 20 to the first output 21 and thus on a short path from the EGR valve 11 to the distribution channel 12.
  • the recirculated exhaust gases are then uncooled and can thus additionally supply heat to the internal combustion engine. This may also be necessary for larger diesel engines after warm-up, if they produce too little heat in part-load operation due to their low efficiency.
  • the respective switching valve 10 may then be configured to set at least one additional intermediate position in which the exhaust gases from the inlet 20 are guided both through the first outlet 21 and through the second outlet 22.
  • the particular embodiment shown here is also characterized in that the first output 21 of the switching valve 10 and the exhaust gas outlet 27 of the exhaust gas cooler 9 separately and spaced from each other are connected to the distribution channel 12, which simplifies the structure of the intake system 1.
  • the distribution channel 12 which simplifies the structure of the intake system 1.
  • first outlet 21 and exhaust gas outlet 27 are arranged at mutually remote ends of distribution channel 12. This arrangement allows for the exhaust gas cooler 9 an elongated design, whereby the intake system 1 is particularly compact.
  • the exhaust gas cooler 9 is fastened in the region of its exhaust gas inlet 26 via a corresponding flange connection 30 to the housing 25 of the switching valve 10. In the region of its exhaust outlet 27, the exhaust gas cooler 9 is fastened via the cover plate 17 or with its screws 18 to the exhaust manifold 2.
  • connection between exhaust gas cooler 9 on the one hand and switching valve 10 and cover plate 17 on the other hand is specifically designed so that between the exhaust cooler 9 facing top of the cover plate 17 and the cover plate 17 facing bottom side of the exhaust gas cooler 9, a distance 31 sets, the so dimensioned is that through this distance 31 through the upper through holes 7 of the two middle flange 6 are accessible, which greatly simplifies the assembly of the fresh gas manifold 2 to the internal combustion engine when the associated components of the EGR device 8 already mounted on the fresh gas manifold 2.
  • the intake system 1 is already completely pre-assembled, at least in the area of the fresh gas distributor 2 and checked for their function before being attached as a unit to the internal combustion engine.
  • This unit 32 comprises at least the cover plate 17, the switching valve 10 and the exhaust gas cooler 9.
  • the unit 32 also includes the EGR valve 11.
  • This unit 32 is independent can be pre-assembled by the fresh gas distributor 2 and can be mounted completely mounted on the top plate 17 on the fresh gas distributor 2. The design of this unit 32 simplifies the assembly of the intake system 1 and the independent functional verification of the EGR components.
  • the exhaust path is heat-transmitting coupled with a coolant path, which can be connected to a corresponding coolant circuit, in particular to the cooling circuit of the internal combustion engine.
  • a coolant path which can be connected to a corresponding coolant circuit, in particular to the cooling circuit of the internal combustion engine.
  • two coolant connections namely a first coolant connection 33 and a second coolant connection 34 are formed on the exhaust gas cooler 9.
  • the EGR valve 11 is actively cooled.
  • a corresponding coolant path is formed in a housing 35 of the EGR valve 11.
  • the housing 35 of the EGR valve 11 has two coolant connections, namely a third coolant connection 36 and a fourth coolant connection 37.
  • coolant connections 33, 34, 36, 37 are the coolant connections 33, 34, 36, 37 here so matched to each other, that in the assembled state of a coolant connection (Second coolant port 34) of the exhaust gas cooler 9 is directly connected to the one coolant port (third coolant port 36) of the EGR valve 11, so that it is possible to dispense with additional connecting pieces.
  • each distribution channel 12, 12 ' communicates with the fresh gas distributor 2, wherein the distribution channels 12, 12' here are each equipped with the discrete return openings 14, for each fresh gas outlet 4 each have a return opening 14.
  • a special feature is now seen in that the first Output 21 is connected to the one distribution channel 12, while the exhaust gas outlet 27 is connected to the other distribution channel 12 '. Accordingly, via the one distribution channel 12 exclusively uncooled exhaust gas in the fresh gas distributor.
  • the variant according to Fig. 7 can also be a simultaneous and thereby separate supply of cooled and uncooled exhaust gases in the fresh gas distributor 2 can be realized without that to two separate distribution channels 12 and 12 'as in the embodiment according to Fig. 6 required are.
  • the only distribution channel 12 is divided by a partition wall 38 into two separate distribution sub-channels 12a and 12b.
  • Each of these distribution sub-channels 12a, 12b again extends adjacent to all fresh gas outlets 4 and preferably communicates via discrete return opening 14 with the fresh gas distributor 12.
  • the one distributor sub-channel 12 a is connected to the first output 21 of the switching valve 10, while the other distributor sub-channel 12 b is connected to the exhaust gas outlet 27 of the exhaust gas cooler 9.

Landscapes

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

Claims (10)

  1. Dispositif d'admission pour un moteur à combustion interne, notamment dans un véhicule automobile, comportant au moins un distributeur de gaz frais (2), qui sert à introduire du gaz frais dans plusieurs cylindres du moteur à combustion interne coordonnés au distributeur de gaz frais (2) et présente pour chaque cylindre coordonné au moins une sortie de gaz frais (4, 4a, 4b), qui sont disposées les unes à côté des autres, moyennant quoi sur le distributeur de gaz frais (2) au moins un canal distributeur (12) d'un dispositif de réintroduction de gaz d'échappement (8) est prévu, lequel est disposé à proximité de toutes les sorties de gaz frais (4a, 4a, 4b) du distributeur de gaz frais (2) et communique avec le distributeur de gaz frais (2), caractérisé en ce que
    - le dispositif de réintroduction de gaz d'échappement (8) présente un distributeur de commutation (10) avec une entrée (20) et deux sorties (21, 22),
    - l'entrée (20) du distributeur de commutation (10) est raccordée à une soupape de réintroduction de gaz d'échappement (11) ou à une conduite d'introduction de gaz d'échappement du dispositif de réintroduction de gaz d'échappement (8),
    - la première sortie (21) du distributeur de commutation (10) est raccordée au canal distributeur (12),
    - la deuxième sortie (22) du distributeur de commutation (10) est raccordée à une admission de gaz d'échappement (26) d'un refroidisseur de gaz d'échappement (9) du dispositif de réintroduction de gaz d'échappement (8),
    - une évacuation de gaz d'échappement (27) du refroidisseur de gaz d'échappement (9) est raccordée de manière séparée et espacée de la première sortie (21) du distributeur de commutation (10) au même ou à un autre canal distributeur (12),
    - le canal distributeur (12) présente un profilé en U, dont le côté ouvert (15) est éloigné de l'intérieur du distributeur de gaz frais (2) et à travers la base en U (16) de celui-ci le canal distributeur (12) communique avec le distributeur de gaz frais (2).
  2. Dispositif d'admission selon la revendication 1,
    caractérisé en ce que
    le canal distributeur (12) est intégré en un seul tenant dans le distributeur de gaz frais (2).
  3. Dispositif d'admission selon la revendication 1 ou 2,
    caractérisé en ce que
    le canal distributeur (12) est obturé sur le côté ouvert (15) de son profilé avec une plaque de couvercle (17), à travers laquelle du gaz d'échappement peut être introduit à travers le canal distributeur (12) pendant le fonctionnement du dispositif de réintroduction de gaz d'échappement (8).
  4. Dispositif d'admission selon la revendication 3,
    caractérisé en ce que
    la plaque de couvercle (17) est intégrée en un seul tenant dans un logement (25) du distributeur de commutation (10).
  5. Dispositif d'admission selon la revendication 4,
    caractérisé en ce que
    le refroidisseur de gaz d'échappement (9) et le distributeur de commutation (10) forment avec le logement (25) et la plaque de couvercle (17) une unité prémontable (32), qui peut être montée par-dessus la plaque de couvercle (17) sur le distributeur de gaz frais (2).
  6. Dispositif d'admission selon une des revendications 1 à 5,
    caractérisé en ce que
    le canal distributeur (12) communique à travers plusieurs ouvertures de réintroduction (14) séparées avec le distributeur de gaz frais (2), moyennant quoi les ouvertures de réintroduction (14) sont positionnées sélectivement le long du canal distributeur (12) par rapport au cylindre coordonné au distributeur de gaz frais (2).
  7. Dispositif d'admission selon la revendication 6,
    caractérisé en ce que
    le distributeur de gaz frais (2) présente pour chaque cylindre coordonné deux sorties de gaz frais (4) disposées l'une à côté de l'autre, à savoir respectivement une sortie principale (4a) et une sortie annexe (4b), moyennant quoi les ouvertures de réintroduction (14) sont positionnées sélectivement le long du canal distributeur (12) par rapport aux sorties principales (4a) ou aux sorties annexes (4b).
  8. Dispositif d'admission selon une des revendications 1 à 7,
    caractérisé en ce que
    l'évacuation de gaz d'échappement (27) du refroidisseur de gaz d'échappement (9) et la première sortie (21) du distributeur de commutation (10) sont raccordées aux extrémités éloignées l'une de l'autre sur le canal distributeur (12).
  9. Dispositif d'admission selon une des revendications 1 à 8,
    caractérisé en ce que
    deux canaux distributeurs séparés (12, 12') sont prévus, moyennant quoi la première sortie (21) du distributeur de commutation (10) est raccordée à un des canaux distributeurs (12), alors que l'évacuation de gaz d'échappement (27) du refroidisseur de gaz d'échappement (9) est raccordée à l'autre canal distributeur (12').
  10. Dispositif d'admission selon une des revendications 1 à 8,
    caractérisé en ce que
    dans le canal distributeur (12), deux canaux distributeurs (12a, 12b) séparés l'un de l'autre sont réalisés, lesquels sont respectivement disposés à proximité de toutes les sorties de gaz frais (4a, 4a, 4b) et desquels un des canaux distributeurs (12a) est raccordé à la première sortie (21) du distributeur de commutation (10), alors que l'autre canal distributeur (12b) est raccordé à l'évacuation de gaz d'échappement (27) du refroidisseur de gaz d'échappement (9).
EP07118191A 2003-11-19 2004-11-12 Dispositif d'admission pour un moteur à combustion interne Expired - Fee Related EP1870591B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10354129A DE10354129A1 (de) 2003-11-19 2003-11-19 Sauganlage für eine Brennkraftmaschine
EP04026887A EP1533512B1 (fr) 2003-11-19 2004-11-12 Dispositif d'admission pour un moteur à combustion interne

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP04026887A Division EP1533512B1 (fr) 2003-11-19 2004-11-12 Dispositif d'admission pour un moteur à combustion interne

Publications (3)

Publication Number Publication Date
EP1870591A2 EP1870591A2 (fr) 2007-12-26
EP1870591A3 EP1870591A3 (fr) 2008-02-20
EP1870591B1 true EP1870591B1 (fr) 2009-07-29

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EP04026887A Expired - Fee Related EP1533512B1 (fr) 2003-11-19 2004-11-12 Dispositif d'admission pour un moteur à combustion interne
EP07118191A Expired - Fee Related EP1870591B1 (fr) 2003-11-19 2004-11-12 Dispositif d'admission pour un moteur à combustion interne

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Also Published As

Publication number Publication date
DE502004009844D1 (de) 2009-09-10
DE502004006651D1 (de) 2008-05-08
EP1533512A2 (fr) 2005-05-25
EP1870591A3 (fr) 2008-02-20
DE10354129A1 (de) 2005-06-23
EP1533512B1 (fr) 2008-03-26
EP1533512A3 (fr) 2006-05-17
EP1870591A2 (fr) 2007-12-26

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