EP3141713B1 - Tuyau de raccordement destiné au raccordement d'un silencieux actif d'un système d'échappement pour moteur à combustion interne - Google Patents

Tuyau de raccordement destiné au raccordement d'un silencieux actif d'un système d'échappement pour moteur à combustion interne Download PDF

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Publication number
EP3141713B1
EP3141713B1 EP16184744.7A EP16184744A EP3141713B1 EP 3141713 B1 EP3141713 B1 EP 3141713B1 EP 16184744 A EP16184744 A EP 16184744A EP 3141713 B1 EP3141713 B1 EP 3141713B1
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EP
European Patent Office
Prior art keywords
pipe
cooling
coolant
connection
connection pipe
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.)
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Application number
EP16184744.7A
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German (de)
English (en)
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EP3141713A1 (fr
Inventor
Viktor Koch
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.)
Eberspaecher Exhaust Technology GmbH and Co KG
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Eberspaecher Exhaust Technology GmbH and Co KG
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Publication of EP3141713A1 publication Critical patent/EP3141713A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • F01N1/065—Silencing apparatus characterised by method of silencing by using interference effect by using an active noise source, e.g. speakers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/007—Apparatus used as intake or exhaust silencer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/0205—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using heat exchangers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/20—Exhaust treating devices having provisions not otherwise provided for for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes

Definitions

  • the present invention relates to a connecting pipe for connecting an active muffler with an exhaust pipe of an exhaust system for an internal combustion engine, in particular a motor vehicle, having the features of the preamble of claim 1.
  • the invention also relates to an active muffler, with such a connecting pipe to an exhaust pipe of a Exhaust system is connected.
  • the invention also relates to an exhaust system with an active silencer, which is connected with such a connecting pipe to an exhaust pipe of the exhaust system.
  • an exhaust system that has an exhaust system that has an exhaust pipe leading exhaust pipe.
  • an active silencer is provided which has a silencer housing and an electroacoustic transducer arranged in the silencer housing.
  • a connecting tube is provided, the tube wall enclosing a leading from the muffler housing to the exhaust pipe connecting space and which is fluidly connected to the muffler housing and to the exhaust pipe.
  • the transducer which is preferably a loudspeaker, is exposed in the housing to a pilot volume which is fluidically coupled to the interior of the exhaust pipe via the connecting tube.
  • a portion of the connecting pipe which is equipped with the diaphragm elements, be designed as a heat sink, in order to dissipate heat from the exhaust gas, so as to reduce the thermal load of the active silencer and in particular of the converter.
  • the present invention is concerned with the problem of providing for a connecting pipe or for an active silencer or for an exhaust system of the type mentioned in an improved or at least another embodiment, characterized by an efficient thermal protection of the converter or the active silencer distinguished. At the same time, an efficient acoustic coupling between the muffler and the exhaust pipe is desired.
  • the invention is based on the general idea to provide at least one cooling tube, which is flowed through by a coolant and is arranged so that it passes through the connecting pipe. As a result, there is a portion of the cooling tube in the connection space and can cause cooling there.
  • a cooling tube which can be traversed by a coolant, heat from the exhaust gas, which is located in the connecting space, can be transferred to the cooling tube and from the cooling tube to the coolant and be removed with the coolant from the cooling tube. This results in a particularly efficient cooling of the exhaust gas in the connecting space, whereby a corresponding, more efficient thermal protection of the converter or the muffler can be achieved.
  • the exhaust system presented here has a particularly high acoustic efficiency.
  • the respective cooling tube has an inlet section and an outlet section.
  • the attachment of the cooling tube on or in the connecting tube takes place in such a way that the inlet section penetrates the tube wall, so that a coolant inlet, through which coolant can enter into the cooling tube, is arranged outside the connecting tube, and in that the outlet section penetrates the tube wall, so that a coolant outlet through which coolant can exit from the cooling pipe is arranged outside the connection pipe.
  • the supply and discharge of the coolant within the connecting tube does not require any space, so that comparatively much free cross-section for propagation of airborne noise in the connection room is available.
  • the respective wall bushing is made tight, so that no exhaust gas can escape from the connection space in the environment.
  • inlet section and outlet section of the respective cooling tube may be passed through the tube wall on opposite sides of the connecting tube.
  • This passage through the pipe wall expediently takes place such that the coolant inlet and the coolant outlet each have a distance from the pipe wall in the respective cooling pipe. Said distance is measured transversely to the longitudinal center axis of the connecting tube.
  • the respective cooling pipe protrudes on the inlet side and outlet side outward beyond the pipe wall of the connecting pipe.
  • the cooling tube acts like a hollow anchor which can be loaded on tensile and compressive forces.
  • the implementation is sealed, for example, with a soldering or welding or adhesive bond.
  • the coolant inlet and the coolant outlet of the respective cooling tube can be open to an environment surrounding the connecting tube, so that ambient air can flow through the cooling tube as coolant.
  • ambient air from the environment may enter the cooling tube through the coolant inlet and exit the cooling tube into the environment through the coolant outlet.
  • the respective cooling pipe can be arranged relative to the connecting pipe so that in the installed state of the exhaust system and during operation of the internal combustion engine, the formation of a convection flow through the cooling pipe is favored.
  • the air in the cooling tube may expand. Convection can lead to an air flow in the respective cooling tube.
  • the arrangement of the cooling tube on or in the connecting pipe favors this convection, so that the air heated by the exhaust gas exits the cooling tube through the coolant outlet.
  • air from the environment flows through the coolant inlet into the cooling tube.
  • the coolant outlet may be at an upper side of the connection pipe while the coolant inlet is at a lower side of the connection pipe.
  • the top of the connecting pipe is arranged in the installed state of the exhaust system with respect to the direction of gravity above the bottom of the connecting pipe. By this orientation or orientation of the connecting pipe, the convection flow is promoted by the cooling tube.
  • the cooling tube can be arranged and / or shaped relative to the connecting tube such that the coolant inlet faces an ambient air flow resulting from the use of the connecting tube or the silencer or the exhaust system in a motor vehicle and when the vehicle is moving adjusted by the movement of the vehicle in the region of the connecting pipe.
  • this ambient air flow can be generated by means of a blower arranged in the surroundings or reinforced. Since the coolant inlet faces this ambient air flow, this results in increased pressure at the coolant inlet, which drives the ambient air into the cooling tube and generates a cooling air flow from the coolant inlet to the coolant outlet in the cooling tube.
  • the inlet section of the cooling tube can be bent at least outside the connecting tube such that the coolant inlet has a spacing from the longitudinal central axis of the respective cooling tube. In particular, this can improve an alignment of the coolant inlet to the aforementioned ambient air flow.
  • the inlet portion is bent so that the coolant inlet faces the ambient air flow. This results in a geometrical adaptation of the cooling tube in the region of the inlet section to the installation situation in order to improve the inflow of the ambient air flow to the coolant inlet.
  • the coolant inlet may be bevelled with respect to a longitudinal center axis of the cooling tube such that an inlet cross section of the coolant inlet facing the ambient air flow is greater than a tube cross section of the cooling tube adjacent to the tapered coolant inlet.
  • the tube cross-section is determined perpendicular to the longitudinal central axis of the cooling tube. Due to the increased inlet cross-section, the dynamic pressure at the coolant inlet can be increased due to the flow of ambient air flow. Consequently, the flow rate at which the air flows through the cooling tube can be increased.
  • the cooling tube can be designed in a straight line at least in the connecting space and be arranged obliquely relative to the connecting tube, so that the coolant inlet faces the ambient air flow.
  • the open cross-section of the coolant inlet is in a projection increases parallel to the flow direction of the ambient air flow, which increases the dynamic pressure at the coolant inlet and improves the flow of cooling air through the cooling air or ambient air.
  • At least one such cooling tube can be integrated into a cooling circuit in which a coolant circulates.
  • the coolant inlet is connected to a supply line of the cooling circuit, which supplies the coolant to the coolant, while the coolant outlet is connected to a return of the cooling circuit, which discharges the coolant from the cooling tube.
  • This can be an open cooling circuit.
  • a closed cooling circuit is used.
  • This may be a cooling circuit already present on the internal combustion engine or in the vehicle, into which the respective cooling pipe is integrated in a corresponding manner.
  • it may be an engine cooling circuit.
  • a cooling circuit or refrigerant circuit of an air conditioning system of the vehicle it is also conceivable to provide a separate cooling circuit for the cooling of the active silencer.
  • a liquid coolant can be used in such a closed cooling circuit, which considerably improves the efficiency of the heat transfer and thus the cooling effect.
  • At least two cooling tubes are integrated in parallel in the cooling circuit, so that they can be flowed through in parallel by the coolant. It is also conceivable that at least two cooling tubes are integrated in series in the cooling circuit, so that they can be flowed through by the coolant in succession.
  • the parallel flow allows a larger volume flow of coolant.
  • the series connection leads to an increased efficiency.
  • all existing coolant pipes are integrated either in parallel or in series in the cooling circuit.
  • a plurality of cooling tubes in parallel are flowed through, while several cooling tubes are flowed through in series. For example, it is conceivable to flow through at least two groups of cooling tubes in series with coolant, wherein the groups themselves are bound in parallel into the cooling circuit.
  • the coolant inlet of at least one such cooling pipe may be connected via at least one supply line to a cooling air blower, which sucks ambient air and through the respective cooling tube, the coolant outlet is open in the environment, so that the ambient air through the coolant outlet of this or a other cooling pipe immediately exits back into the environment.
  • a common supply line may be provided which supplies a plurality of cooling tubes with ambient air. If a series arrangement with a plurality of cooling tubes is provided, the coolant outlet of a cooling tube, which is not the last cooling tube of the respective row, can be connected by means of a connecting line to the coolant inlet of a subsequent cooling tube. Within the series arrangement, the cooling air then exits only at the last cooling tube of the row directly into the environment.
  • At least one such cooling tube can be configured in a straight line at least in the connecting space.
  • Straight cooling tubes can be installed particularly easily and thus inexpensively in the connecting tube.
  • at least one such cooling tube may have a circular cross-section at least in the connecting space.
  • Such cooling tubes can be produced particularly inexpensively and obstruct easily.
  • At least one such cooling tube may have an elongate cross-section at least in the connection space.
  • the cross section is again oriented perpendicular to the longitudinal central axis of the respective cooling tube.
  • the cooling tube can have a particularly large surface, which also favors efficient heat transfer from the exhaust gas to the coolant.
  • the cooling pipe provided with the oblong cross section and aligned flat with respect to the longitudinal direction of the elongated cross section may be arranged parallel to the longitudinal central axis of the connecting pipe in the connecting space.
  • Fig. 1 and 2 comprises an exhaust system 1 for an internal combustion engine, not shown here, at least one exhaust line 2, which has at least one exhaust pipe leading exhaust pipe 3.
  • the exhaust system 1 is used in a conventional manner for removing combustion exhaust gases from the internal combustion engine and for the aftertreatment of the exhaust gases to noise emissions and pollutant emissions to reduce.
  • the internal combustion engine and the exhaust system 1 are arranged in a motor vehicle.
  • the use of the exhaust system presented here is also conceivable in a stationary internal combustion engine.
  • the exhaust line 2 is connected on the input side via a manifold, not shown, to a cylinder head of the internal combustion engine.
  • On the output side of the exhaust line 2 has a tailpipe also not shown here, through which the exhaust gases can escape into the environment.
  • At least one active muffler 4 is connected to the exhaust line 2 and to the exhaust pipe 3, with the aid of which the transmitted noise in the exhaust noise can be changed.
  • the active silencer 4 generates phase-shifted counter-sound, so-called "anti-sound", in order to reduce the background noise in a targeted manner.
  • the active muffler 4 can also be used to modulate the sound transported in the exhaust line 2 to produce a more pleasant sound. This does not necessarily require a reduction in the volume of the emitted sound.
  • the muffler 4 thus serves to reduce noise by superposition with synthetically generated sound, which leads to a reduction in the volume and / or change in the emitted sound.
  • the muffler 4 has a muffler housing 5, in which in the usual way at least one in Fig. 2 schematically indicated electroacoustic transducer 6, for example in the form of a loudspeaker, is arranged, with the aid of which the above-mentioned synthetic sound can be generated.
  • a connecting pipe 7 is provided, the pipe wall 8 encloses a connecting space 9.
  • the connecting space 9 connects a arranged in the muffler housing 5 Vorvolumen 10, which is acted upon by the transducer 6 in the operation of the muffler 4 with sound, with an interior 11 of the exhaust pipe 3, in which the exhaust gas flows during operation of the internal combustion engine.
  • the connecting pipe 7 or the pipe wall 8 thus gas-tightly connects the muffler housing 5 with the exhaust pipe 3.
  • the compound also prefers a mechanical fixation of the connecting pipe 7 on the exhaust pipe 3 and the muffler housing 5, so that ultimately a mechanical fixation of the muffler housing 5 using the connecting tube 7 takes place on the exhaust pipe 3.
  • the exhaust gas line 2 in the exhaust pipe 3 may have a connecting piece 12, which in the example of Fig. 1 designed as a Y-tube.
  • Such an active silencer 4 preferably comes as far back as possible, ie remote from the engine, in order to be able to influence the background noise, before it exits the exhaust line 2 into the environment through the respective tailpipe.
  • a motor remote positioning of the noise is already significantly attenuated by the exhaust system, in particular by conventional passive muffler, so that at this point the efficiency of the active muffler 4 is particularly large.
  • the in Fig. 1 shown outflow pipe section 3b form the tailpipe. In principle, however, any desired positioning along the exhaust line 2 is conceivable. In particular, a close-coupled arrangement is conceivable.
  • the exhaust gas carries with it heat that can propagate from the interior 11 of the exhaust pipe 3 through the connecting space 9 into the pre-volume 10 of the muffler 4 and there can lead to a corresponding heating of the converter 6.
  • a plurality of such cooling tubes 14 are provided, which are preferably designed the same or at least similar.
  • these cooling tubes 14 are presented below, which can preferably be realized alternatively. In principle, two or more or all variants can also be realized cumulatively, such that at least two cooling tubes 14 are configured differently within the same connecting tube 7.
  • the respective cooling pipe 14 has an inlet section 15 and an outlet section 16.
  • the inlet section 15 penetrates the pipe wall 8, so that a coolant inlet 17 of the respective cooling pipe 14 is located outside the connecting pipe 7. Through the coolant inlet 17, a coolant flow indicated in the figures by arrows 18 can enter the respective cooling pipe 14.
  • the outlet section 16 likewise penetrates the tube wall 8, so that a coolant outlet 19 is also arranged outside the connecting tube 7. Through the coolant outlet 19, the coolant exits the cooling tube 14 again.
  • the individual pipe penetrations are carried out in a suitable manner sufficiently tight. For example, passages may be formed in the tube wall 8, through which the cooling tubes 14 are inserted.
  • An outwardly projecting ring collar of the respective Pull-through is flat on the outer circumference of the respective cooling tube 14 to the system, so that in particular in combination with a solder joint or welded connection, a sufficiently tight connection can be realized.
  • the inlet section 15 and the outlet section 16 are guided on opposite sides (22, 23) of the connecting tube 7 through the tube wall 8.
  • the cooling tubes 14, in particular in a preferred straight-line design can be installed particularly easily in the connecting tube 7.
  • FIGS. 12 and 13 indicate that it is also possible to arrange inlet section 15 and outlet section 16 differently, in particular so that they pass through the tube wall 8 on the same side (23) of the connecting tube 7.
  • Such configurations are more suitable for embodiments described below, which operate with active cooling.
  • inlet section 15 and outlet section 16 protrude beyond the pipe wall 8, so that the coolant inlet 17 opposite the pipe wall 8 has an in Fig. 5 Plotted distance 42 has.
  • the coolant outlet 19 has a distance 41 relative to the tube wall 8.
  • the respective distance 41, 42 is measured parallel to a transverse direction of the connecting tube 7, which extends perpendicular to the longitudinal direction of the connecting tube 7.
  • the longitudinal direction of the connecting tube 7 extends parallel to the longitudinal central axis 27 of the connecting tube 7.
  • the distances 41 and 42 may be of different sizes.
  • the coolant inlet 17 and the coolant outlet 19 of the respective cooling tube 14 are each open to an environment 20 surrounding the connecting tube 7.
  • ambient air can flow as coolant through the respective cooling tube 14.
  • This coolant flow or air flow through the cooling tubes 14 can be pure passively by convection.
  • the cooling tubes 14 can be arranged relative to the connecting tube 7 so that in the installed state of the exhaust system 1 and in the operation of the internal combustion engine, the formation of a convection flow, the in Fig. 4 indicated by arrows 21, is favored by the respective cooling tube 14 therethrough.
  • the coolant outlet 19 is located on an upper side 22 of the connecting tube 7, while the coolant inlet 17 is located on a lower side 23 of the connecting tube 7.
  • the top 22 is located with respect to the indicated by an arrow gravity direction G above the bottom 23.
  • Top 22 and bottom 23 therefore preferably form the two aforementioned, opposite sides of the connecting pipe 7, through which the respective inlet portion 15 and respective outlet section 16 are passed.
  • the exhaust gas which can enter from the exhaust pipe 3 into the connecting pipe 7, heats the respective cooling pipe 14, which is exposed to the exhaust gas in the connecting space 9.
  • the heat absorbed by the cooling tube 14 is transferred to the air therein so that it can heat up and rise.
  • the heated air thus exits from the cooling tubes 14 at the upper side 22, whereby at the same time cooler air from the environment 20 is sucked in at the lower side 23.
  • the respective cooling tube 14 may be arranged relative to the connecting pipe 7 and / or shaped so that the coolant inlet 17 an ambient air flow 25 which in the 4 to 6 each indicated by an arrow is facing.
  • This ambient air flow 25 can be adjusted in the region of the connecting tube 7, for example, by the movement of the vehicle when the exhaust system 1 is used in a vehicle.
  • the ambient air flow 25 is formed in particular by a part of the so-called "wind”.
  • a in Fig. 6 indicated fan 26 may be provided which is arranged for this purpose in the environment 20 and which generates or amplifies the ambient air flow 25.
  • a blower 26 may optionally also be provided in the other embodiments.
  • the inlet section 15 of the respective cooling tube 14 may be bent outside the connecting tube 7 such that the coolant outlet 17 faces the ambient air flow 25.
  • the ambient air flow 25 is substantially parallel to the longitudinal central axis 27 of the connecting tube 7.
  • the cooling tubes 14 extend within the connecting space 9 perpendicular to the longitudinal center axis 27. As a result, the inlet portions 15 are bent by about 90 °, so that the coolant inlet 17 optimally on the Ambient air flow 25 is aligned.
  • the curved inlet section 15 also has the consequence that the coolant inlet 17 is arranged eccentrically with respect to the longitudinal central axis 28 of the respective cooling tube 14 and accordingly has a distance 43 from the longitudinal central axis 28 of the cooling tube 14. In this case, the spacing direction is perpendicular to the longitudinal central axis 28 of the respective cooling tube 14.
  • the support of the convection flow 21 is realized by an oblique arrangement of the cooling tubes 14 in the connecting tube 7.
  • the cooling tubes 14, which are expediently configured rectilinearly at least in the connection space 9, are arranged obliquely with respect to the connection tube 7, whereby the alignment also takes place here such that the respective coolant inlet 17 faces the ambient air flow 25.
  • the longitudinal central axes 28 of the coolant tubes 14 with the longitudinal central axis 27 of the connecting tube 7 form an angle which is smaller than 90 °.
  • cooling tubes 14 in the connecting tube 7 may be provided to arrange the cooling tubes 14 in the connecting tube 7 at an angle and / or to provide them with a chamfered coolant inlet 17 and / or with a curved inlet section 15.
  • the coolant inlet 17 may be connected to a cooling air blower 46 at the respective cooling tube 14.
  • the cooling-air blower 46 is connected to the environment 20 on the suction side and connected to the coolant inlet 17 via a supply line 40 on the pressure side.
  • the cooling air blower 46 sucks ambient air as a coolant of a basically any suitable, especially cool, location and promotes this through the respective cooling pipe 14.
  • a corresponding cooling air flow is indicated by arrows 45.
  • the cooling air flow 45 again exits directly into the environment 20.
  • the feed line 40 leads the cooling air blower 46 driven by the cooling air parallel to a plurality of cooling tubes 14 from thedeffenauslässen 19 the cooling air then exits parallel to the environment 20.
  • the supply line 40 leads the cooling air blower 46 driven by the cooling air to the first cooling tube 14 of the series.
  • each cooling tube 14 is then connected via a connecting line to the cooling tube 14 which follows in the row, the connecting line connecting the coolant outlet 19 of one cooling tube 14 to the coolant inlet 17 of the next cooling tube 14. Only at the last cooling tube 14 does the cooling air escape from the coolant outlet 19 into the environment 20.
  • the show Fig. 8 to 10 Examples of a closed cooling circuit 31, in which the respective cooling pipe 14 is integrated.
  • the coolant inlet 17 is connected to a flow 32 of the cooling circuit 31, while the coolant outlet 19 is connected to a return 33 of the cooling circuit 31.
  • the respective coolant is supplied via the flow 32 to the respective cooling pipe 14 and discharged via the return 33 thereof.
  • a coolant flow which is indicated by an arrow 34.
  • a liquid coolant circulates.
  • the cooling circuit 31 is a branch of an engine cooling circuit, which is used for cooling the internal combustion engine.
  • the cooling circuit 31 has in the usual way a coolant pump 35 for driving the coolant and a heat exchanger 36, via which the absorbed heat can be released from the coolant to the environment.
  • the integration of the cooling tubes 14 in the cooling circuit 31 may according to Fig. 9 be done so that a plurality of cooling tubes 14 are integrated in parallel in the cooling circuit 31, so that these cooling tubes 14 are flowed through in parallel by the coolant.
  • the flow 32 is connected to the coolant inlet 17 of the first cooling tube 14 of the series circuit or series, while the return 33 is connected to the coolant outlet 19 of the last cooling tube 14 of the series.
  • the cooling tubes 14 of the series at least one connecting line 44 are connected to each other, wherein the respective connecting line 44 connects the coolant outlet 19 of a cooling tube 14 with the coolant inlet 17 of the following cooling tube 14 in the series.
  • the connecting pipe according to the in the FIGS. 14 to 17 a plurality of cooling tubes 14 with respect to the longitudinal central axis 27 of the connecting tube 7 can be arranged behind one another and next to one another, wherein at least two juxtaposed rows or groups 37 are formed on cooling tubes 14, in each of which a plurality of cooling tubes 14 arranged one behind the other are contained.
  • the individual cooling tube groups 37 can now be connected in parallel to the cooling circuit 31, so that these cooling tube groups 37 are flowed through in parallel by the coolant.
  • the associated cooling tubes 14 may be connected in series to the cooling circuit 31, so that they are flowed through within the cooling tube group 37 successively by the coolant.
  • the cooling tubes 14 each have a circular cross-section, which in the examples of FIGS. 14 to 17 is indicated.
  • the show Fig. 18 to 20 Examples of cooling tubes 14, which have an elongated, in particular rectilinear, cross-section, at least in the connecting space 9.
  • the respective cooling tube 14 receives a flat profile whose longitudinal direction is defined by the larger dimension of the elongate cross section.
  • the flat cooling tube 14 is aligned with respect to its longitudinal direction parallel to the longitudinal central axis 27 of the connecting tube 7.
  • FIGS. 19 and 20 is the respective cooling tube 14 on the other hand employed with respect to its longitudinal direction relative to the longitudinal center axis 27 of the connecting tube 7.
  • the connecting tube 7 is configured in a straight line in the embodiments shown here, which simplifies its manufacture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Exhaust Silencers (AREA)

Claims (15)

  1. Tuyau de raccordement servant à raccorder de manière fluidique un boîtier de silencieux (5) d'un silencieux actif (4) à un tuyau de gaz d'échappement (3) acheminant des gaz d'échappement d'une ligne d'échappement (2) d'un système d'échappement (1) pour un moteur à combustion interne, en particulier d'un véhicule automobile,
    - dans lequel le tuyau de raccordement (7) présente une paroi de tuyau (8), qui enveloppe un espace de raccordement (9) menant du boîtier de silencieux (5) au tuyau de gaz d'échappement (3),
    caractérisé en ce
    - qu'est disposé, dans l'espace de raccordement (9), au moins un tuyau de refroidissement (14) pouvant être traversé par un milieu de refroidissement, lequel présente une section d'entrée (15) et une section de sortie (16),
    - que la section d'entrée (15) traverse la paroi de tuyau (8) de sorte qu'une entrée de milieu de refroidissement (17), par laquelle du milieu de refroidissement peut entrer dans le tuyau de refroidissement (14), soit disposée à l'extérieur du tuyau de raccordement (7),
    - que la section de sortie (16) traverse la paroi de tuyau (8) de sorte qu'une sortie de milieu de refroidissement (19), par laquelle du milieu de refroidissement peut sortir du tuyau de refroidissement (14), soit disposée à l'extérieur du tuyau de raccordement (7).
  2. Tuyau de raccordement selon la revendication 1,
    caractérisé en ce
    que la section d'entrée (15) et la section de sortie (16) du tuyau de refroidissement (14) respectif sont guidées à travers la paroi de tuyau (8) au niveau de côtés (22, 23) se faisant face du tuyau de raccordement (7) de telle manière que pour le tuyau de refroidissement (14) respectif, l'entrée de milieu de refroidissement (17) et la sortie de milieu de refroidissement (19) présentent respectivement une distance (41, 42) par rapport à la paroi de tuyau (8).
  3. Tuyau de raccordement selon la revendication 2,
    caractérisé en ce
    que l'entrée de milieu de refroidissement (17) et la sortie de milieu de refroidissement (19) sont ouvertes vers un environnement (20) enveloppant le tuyau de raccordement (7) de sorte que l'air environnant puisse circuler en tant que milieu de refroidissement à travers le tuyau de refroidissement (14).
  4. Tuyau de raccordement selon la revendication 3,
    caractérisé en ce
    que le tuyau de refroidissement (14) est disposé de telle sorte par rapport au tuyau de raccordement (7) que dans l'état monté du tuyau de raccordement (7) et du système d'échappement (1) et lors du fonctionnement du moteur à combustion interne, la réalisation d'un écoulement de convection (21) à travers le tuyau de refroidissement (14) est favorisée.
  5. Tuyau de raccordement selon la revendication 3 ou 4,
    caractérisé en ce
    - que la sortie de milieu de refroidissement (19) se trouve au niveau d'un côté supérieur (22) du tuyau de raccordement (7), tandis que l'entrée de milieu de refroidissement (17) se trouve au niveau d'un côté inférieur (23) du tuyau de raccordement (7),
    - que le côté supérieur (22) du tuyau de raccordement (7) se trouve au-dessus du côté inférieur (23) du tuyau de raccordement (7) par rapport à la direction de la force de gravité (G).
  6. Tuyau de raccordement selon l'une quelconque des revendications 3 à 5,
    caractérisé en ce
    que le tuyau de refroidissement (14) est disposé et/ou est formé de telle sorte par rapport au tuyau de raccordement (7) que l'entrée de milieu de refroidissement (17) est tournée vers un flux d'air environnant (25), lequel se règle, lors d'une utilisation dans un véhicule automobile et dans le cas d'un véhicule en mouvement, par le déplacement du véhicule dans la zone du tuyau de raccordement (7) et/ou qui est généré ou amplifié au moyen d'une soufflante (26) disposée dans l'environnement (20).
  7. Tuyau de raccordement selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que la section d'entrée (15) du tuyau de refroidissement (14) est cintrée au moins à l'extérieur du tuyau de raccordement (7) de telle sorte que l'entrée de milieu de refroidissement (17) présente une distance (43) par rapport à l'axe central longitudinal (28) du tuyau de refroidissement (14) respectif.
  8. Tuyau de raccordement selon la revendication 6 ou 7,
    caractérisé en ce
    que l'entrée de milieu de refroidissement (17) est biseautée par rapport à un axe central longitudinal (28) du tuyau de refroidissement (14) de telle sorte qu'une section transversale d'entrée (29), tournée vers le flux d'air environnant (25), de l'entrée de milieu de refroidissement (17) est plus grande qu'une section transversale de tuyau (30) du tuyau de refroidissement (14).
  9. Tuyau de raccordement selon l'une quelconque des revendications 6 à 8,
    caractérisé en ce
    que le tuyau de refroidissement (14) est configuré de manière rectiligne au moins dans l'espace de raccordement (9) et est disposé de manière oblique par rapport au tuyau de raccordement (7) de telle sorte que l'entrée de milieu de refroidissement (17) est tournée vers le flux d'air environnant (25).
  10. Tuyau de raccordement selon la revendication 1 ou 2,
    caractérisé en ce
    - qu'au moins un tuyau de raccordement (14) de ce type est intégré dans un circuit de refroidissement (31), dans lequel un milieu de refroidissement circule,
    - que l'entrée de milieu de refroidissement (17) est raccordée à un conduit d'alimentation (32) du circuit de refroidissement (31), lequel amène au tuyau de refroidissement (14) le milieu de refroidissement,
    - que la sortie de milieu de refroidissement (19) est raccordée au niveau d'un conduit de retour (33) du circuit de refroidissement (31), lequel évacue le milieu de refroidissement du tuyau de refroidissement (14).
  11. Tuyau de raccordement selon la revendication 10,
    caractérisé en ce
    - qu'au moins deux tuyaux de refroidissement (14) sont intégrés de manière parallèle dans le circuit de refroidissement (31) de sorte qu'ils puissent être traversés de manière parallèle par le milieu de refroidissement, et/ou
    - qu'au moins deux tuyaux de refroidissement (14) sont intégrés de manière alignée dans le circuit de refroidissement (31) de sorte qu'ils puissent être traversés les uns après les autres par le milieu de refroidissement.
  12. Tuyau de raccordement selon la revendication 1 ou 2,
    caractérisé en ce
    que l'entrée de milieu de refroidissement (17) d'au moins un tuyau de refroidissement (14) de ce type est raccordée à une soufflante d'air de refroidissement (46) au moyen d'au moins une conduite d'amenée (40), aspire l'air environnant et le refoule à travers le tuyau de refroidissement (14) respectif, dans lequel l'air environnant ressort dans l'environnement (20) par la sortie de milieu de refroidissement (19) du tuyau de refroidissement (14) respectif ou est amené, dans le cas d'une disposition alignée de plusieurs tuyaux de refroidissement (14), à l'entrée de milieu de refroidissement (17) d'un tuyau de refroidissement (14) qui suit au moyen d'une conduite de raccordement.
  13. Tuyau de raccordement selon l'une quelconque des revendications 1 à 12,
    caractérisé en ce
    - qu'au moins un tuyau de refroidissement (14) de ce type est configuré de manière rectiligne au moins dans l'espace de raccordement (9), et/ou
    - qu'au moins un tuyau de refroidissement (14) de ce type possède une section transversale circulaire au moins dans l'espace de raccordement (9),
    - qu'au moins un tuyau de refroidissement (14) de ce type possède une section transversale longitudinale au moins dans l'espace de raccordement (9).
  14. Silencieux actif pour un système d'échappement (1) d'un moteur à combustion interne, en particulier d'un véhicule automobile,
    - avec un boîtier de silencieux (5),
    - avec au moins un convertisseur (6) électroacoustique disposé dans le boîtier de silencieux (5),
    - avec au moins un tuyau de raccordement (7) selon l'une quelconque des revendications 1 à 13, dont la paroi de tuyau (8) est raccordée de manière fluidique au boîtier de silencieux (5) ainsi qu'à un tuyau de gaz d'échappement (3) d'une ligne d'échappement (2) du système d'échappement (1).
  15. Système d'échappement pour un moteur à combustion interne, en particulier d'un véhicule automobile,
    - avec au moins une ligne d'échappement (2), qui présente au moins un tuyau de gaz d'échappement (3) acheminant les gaz d'échappement,
    - avec au moins un silencieux actif (4) selon la revendication 14, dont le boîtier de silencieux (5) est raccordé de manière fluidique au tuyau de gaz d'échappement (3) par l'intermédiaire du tuyau de raccordement (7).
EP16184744.7A 2015-09-11 2016-08-18 Tuyau de raccordement destiné au raccordement d'un silencieux actif d'un système d'échappement pour moteur à combustion interne Active EP3141713B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015217461.1A DE102015217461A1 (de) 2015-09-11 2015-09-11 Verbindungsrohr zum Anschließen eines aktiven Schalldämpfers an eine Abgasanlage für eine Brennkraftmaschine

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EP3141713A1 EP3141713A1 (fr) 2017-03-15
EP3141713B1 true EP3141713B1 (fr) 2018-01-03

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Country Status (5)

Country Link
US (1) US9938871B2 (fr)
EP (1) EP3141713B1 (fr)
JP (1) JP6275789B2 (fr)
CN (1) CN106523105B (fr)
DE (1) DE102015217461A1 (fr)

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CN114363781A (zh) * 2022-01-10 2022-04-15 中国船舶重工集团公司第七一一研究所 声源及包括其的动力设备

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Publication number Publication date
JP2017078403A (ja) 2017-04-27
US20170074134A1 (en) 2017-03-16
CN106523105A (zh) 2017-03-22
CN106523105B (zh) 2019-05-03
JP6275789B2 (ja) 2018-02-07
US9938871B2 (en) 2018-04-10
DE102015217461A1 (de) 2017-03-16
EP3141713A1 (fr) 2017-03-15

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