EP0604992A1 - Dispositif d'échappement pour moteur à combustion interne - Google Patents
Dispositif d'échappement pour moteur à combustion interne Download PDFInfo
- Publication number
- EP0604992A1 EP0604992A1 EP93121040A EP93121040A EP0604992A1 EP 0604992 A1 EP0604992 A1 EP 0604992A1 EP 93121040 A EP93121040 A EP 93121040A EP 93121040 A EP93121040 A EP 93121040A EP 0604992 A1 EP0604992 A1 EP 0604992A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- gas treatment
- flow path
- exhaust
- section
- 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.)
- Granted
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Classifications
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- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/087—Other arrangements or adaptations of exhaust conduits having valves upstream of silencing apparatus for by-passing at least part of exhaust directly to atmosphere
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- 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
- F01N13/009—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 having two or more separate purifying devices arranged in series
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- 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
- F01N13/009—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 having two or more separate purifying devices arranged in series
- F01N13/0097—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 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
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- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
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- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
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- 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
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
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- 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
- F01N2230/00—Combination of silencers and other devices
- F01N2230/04—Catalytic converters
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- 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
- F01N2470/02—Tubes being perforated
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- 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
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/02—Two or more expansion chambers in series connected by means of tubes
- F01N2490/06—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet in opposite directions
-
- 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
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/15—Plurality of resonance or dead chambers
- F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction
Definitions
- the invention relates to an exhaust system for internal combustion engines, with a main flow path, which has a silencer and - downstream of this in the flow direction - has two catalytically active exhaust gas treatment bodies, characterized in that a bypass flow path is provided for a section of the main flow path, which comprises the silencer and one bypassing the two exhaust treatment bodies and that the section of the main flow path is closable.
- Catalytic exhaust gas treatment bodies require a certain minimum temperature in order to be able to work properly, which is roughly in the region of 200 to 300 ° C.
- the exhaust system is constructed in such a way that at least one of the exhaust gas treatment bodies, if possible, after the internal combustion engine is started quickly reaches its required operating temperature.
- catalytically active exhaust gas treatment bodies cannot tolerate exhaust gas temperatures of any desired level without being damaged. The temperature that is critical for this depends on the structure of the exhaust gas treatment body and on the structure and composition of the actual, catalytically active material, but a rough guide value can be given as 800 to 900 ° C.
- care should be taken to ensure that the critical temperature on the exhaust gas treatment body (s) is not exceeded even under unfavorable operating conditions, for example prolonged operation of the internal combustion engine under high load.
- the exhaust system according to the invention solves the technical problem of constructing the exhaust system for internal combustion engines in such a way that a catalytically active exhaust gas treatment body at minimum operating temperature is available as soon as possible after starting the internal combustion engine, but overheating of the exhaust gas treatment body or the exhaust gas treatment body is avoided as reliably as possible.
- the exhaust system according to the invention makes it possible to let the exhaust gas flow through the bypass flow path after the cold start of the internal combustion engine and thereby to decouple the muffler and one of the two exhaust gas treatment bodies from the direct flow and the associated heating by the exhaust gas. As a result of this decoupling, the material mass of these components is heated up at least substantially less; the heat loss from these components to the environment is drastically reduced.
- Catalytically active exhaust gas treatment bodies typically consist of a ceramic monolith or a metal flow body, the exhaust gas treatment body having a multiplicity of channels running through it in the flow direction and the inner surfaces being provided with a catalytically active coating.
- This coating contains the actual catalyst, often particles of certain metals, especially platinum. Excessively high temperatures can damage the catalytic coating.
- exhaust gas can flow through the section of the main flow path bypassed by the bypass flow path.
- the exhaust gas emits heat, particularly in the muffler (which in turn heats up and then releases heat to the environment).
- the temperature of the exhaust gas which flows into the exhaust gas treatment bodies is significantly reduced; the exhaust gas treatment bodies remain significantly cooler, in particular when the internal combustion engine is operated for a prolonged period under high load.
- the section of the main flow path can be closed at any point in this section.
- a completely tight seal is not necessary because the invention intended effects can also be achieved if only a small amount of exhaust gas flows through the section of the main flow path.
- the exhaust system according to the invention can also have more than two exhaust gas treatment bodies. In this case, it is important that at least one exhaust gas treatment body is flowed through when the section of the main flow path is closed. On the other hand, one or more exhaust gas treatment bodies can be decoupled from the direct flow in this state.
- the muffler and the exhaust gas treatment body have a common housing, as a result of which weight and production outlay can be saved in comparison with an embodiment with separate housings.
- the two exhaust gas treatment bodies are preferably arranged one after the other in the flow direction; the bypass flow path opens into the space between the first and second exhaust treatment bodies.
- the two exhaust gas treatment bodies it is alternatively possible to arrange the two exhaust gas treatment bodies in parallel in terms of flow. When the section of the main flow path is closed, exhaust gas flows directly through only one of the two exhaust gas treatment bodies; when the section of the main flow path is open, both exhaust gas treatment bodies are flowed through.
- the bypass flow path can preferably also be made closable. In this case, the exhaust gas only flows through the described section of the main flow path when the bypass flow path is closed.
- a particularly compact form of the exhaust system is obtained if the exhaust gas treatment body and silencer are arranged next to one another in a common housing in such a way that the exhaust gas flows in an essentially S-shaped manner during operation.
- a preferred example of this is given below in the description of an exemplary embodiment. If e.g. is more practical for reasons of space, but you can also arrange the silencer and the exhaust gas treatment body in a common housing one behind the other.
- the muffler is preferably designed as a 3-chamber reflection muffler. This training offers favorable prerequisites, in particular for the spatial combination with the exhaust gas treatment bodies in a common housing.
- the silencer can be of any design, e.g. as an absorption silencer.
- bypass flow path piping can be designed with a cross-section that is 30 to 60% of the flow cross-section of said section of the main flow path.
- a particularly favorable design results if transverse walls are provided in the common housing of the silencer and exhaust gas treatment bodies and the exhaust gas treatment body and installation pipes of the muffler are supported by these cross walls. In this way, a 3-chamber reflection muffler can also be realized in a particularly favorable design.
- catalytic exhaust gas treatment bodies are not only used in gasoline-powered internal combustion engines, where they are used in particular as three-way catalysts for oxidizing unburned hydrocarbons and carbon monoxide and for reducing nitrogen oxides, but are also used in exhaust systems for diesel engines, there especially as oxidation catalysts.
- bypass flow path branch off the main flow path fairly close to the internal combustion engine. This applies particularly to the design with a pipeline of the bypass flow path which is thinner than the pipeline of the section of the main flow path mentioned.
- the invention has the effect that when the section of the main flow path is closed, the aforementioned muffler is not flowed through, so that the exhaust gas flowing through the bypass flow path is less soundproofed before flowing through the one exhaust gas treatment body. This is usually practically not annoying, because in most cases there is another silencer behind the exhaust system anyway.
- the invention entails that in that Operating state in which exhaust gas does not flow directly through one of the exhaust gas treatment bodies, overall a shorter exhaust gas treatment body length is available for exhaust gas purification. The resultant, tendency to lower exhaust gas purification effect is more than compensated for by the faster heating of the exhaust gas treatment body through which flow occurs in this operating phase.
- the invention is also intended to include the case in which there is no silencer in the exhaust line in front of the two exhaust gas treatment bodies.
- an essential advantage according to the invention is retained, namely that one of the two exhaust gas treatment bodies is decoupled from the direct exhaust gas flow during the operating phase of flowing through the bypass flow path, and thus there is less heat loss to the environment. This is particularly true in the event that the bypass line has a smaller cross section than the mentioned section of the main flow line.
- the single figure shows in horizontal section an area of an exhaust system designed according to the invention with two exhaust gas treatment bodies and a silencer in a common housing.
- a housing 2 can be seen which, viewed from the left in the drawing, has an oval or somewhat flattened round cross-section.
- the housing 2 is produced in that a peripheral wall 4 made of sheet metal is welded to two end walls 6 made of sheet metal. From the left, a first pipe 8 and a second pipe 10 run side by side through the end wall 6 into the interior of the housing. On the right, a third pipeline 12 leads out of the housing 2 through the end wall 6 there.
- the first pipeline 8 must be imagined to the left beyond the edge of the drawing to the exhaust side of an internal combustion engine (not shown) or to its exhaust manifold, which brings together the exhaust gas flows of the individual cylinders of the internal combustion engine to form a common exhaust pipe.
- the third pipeline 12 must be thought to the right beyond the drawing margin to the end of the exhaust system of the exhaust system. Between the drawn housing 2 and this exhaust outlet end are in the third Pipeline 12 one or more rear silencers installed.
- the second pipeline 10 branches off from the first pipeline 8 fairly close to the internal combustion engine or its exhaust manifold.
- the broken lines 14 indicate that the lengths of the pipes 8 and 10 between the housing 2 and the branch 16 of the second pipe 10 are considerably larger than shown in the drawing. Overall, it is the exhaust system of a motor vehicle.
- a left, first exhaust gas treatment body 18 and — at an axial distance from it, a second exhaust gas treatment body 20 are held in the housing 2.
- the two exhaust gas treatment bodies 18 and 20 are cylindrical in the illustrated embodiment and have essentially the same axial length (measured from left to right in the drawing).
- the two exhaust gas treatment bodies 18 and 20 can also be designed with an unequal axial length, in particular making the second exhaust gas treatment body 20 axially somewhat longer than the first exhaust gas treatment body 18.
- the two exhaust gas treatment bodies 18 and 20 are each fastened by means of a circumferential mounting mat 22 in a shell 24 made of heat-resistant sheet metal.
- the shell 24 In the area of the exhaust gas treatment bodies 18, 20, the shell 24 is roughly cylindrical and in the area to the right of it, that is to say downstream, is shaped as a truncated cone. At the smaller diameter end of the truncated cone, the shell 24 merges into the third pipeline 12.
- the mounting mats 22 consist of sufficiently temperature-resistant fibers. They can also be designed as so-called swelling mats, which contain an addition of mica and thereby increase in volume when heated.
- the mounting mats 22 serve, on the one hand, for the temperature-resistant, thermal expansion differences between the exhaust gas treatment bodies 18, 20 and the shell 24, to enable quasi-elastic fastening of the exhaust gas treatment bodies 18, 20 in the shell 24. At the same time, the mounting mats 22 prevent external flow around the exhaust gas treatment bodies 18, 20.
- the shell 24 can be made from two half-shells that are welded together in an axial plane. At the left end, the shell 24 is open, so that exhaust gas can flow in from the left to the left end face of the first exhaust gas treatment body 18.
- a left, first transverse wall 26 and a right, second transverse wall 28 are fastened in the housing 2 and each run parallel to the end walls 6 of the housing 2.
- the shell 24 is fastened in two aligned openings of the first transverse wall and the second transverse wall 28.
- the shell 24 can be double-walled at least in some areas.
- the first pipeline 8 continues in a straight line inside the housing 2 and forms a first installation pipe 30 of a silencer 32 to be described in more detail later.
- a second installation tube 34 which runs parallel to the first installation tube 30 and in the axial direction of the housing 2.
- the installation tubes 30 and 34 are each fastened in two aligned openings of the first transverse wall 26 and the second transverse wall 28.
- the interior of the housing 2 is divided into three chambers by the transverse walls 26 and 28, namely a left chamber 36, a middle chamber 38 and a right chamber 40 from left to right in the figure.
- the first installation pipe 30 is both in the left chamber 36 and perforated in the middle chamber 38 and ends openly in the right chamber 40.
- the second installation tube 34 is perforated in the middle chamber 38 and has an open end in both the left chamber 36 and the right chamber 40. In this way, a 3-chamber reflection silencer 32 is formed.
- the main flow of the exhaust gas flowing through the first pipeline 8 goes through the first installation pipe 30 into the right-hand chamber 40 and from there, so to speak, backwards through the second installation pipe 34 into the left-hand chamber 36, with additional quantities escaping through the perforations described as a result of the exhaust-gas pressure pulsations and enter.
- the left, open end 42 of the shell 24 described further above lies in the left chamber 36, so that the exhaust gas after passing through the muffler 32 can flow from there through the two exhaust gas treatment bodies 18, 20 and finally flow out through the third pipeline 12. Overall, this results in an essentially S-shaped or meandering course of the flow of the exhaust gas through the housing 2.
- the second pipeline 10 is initially continued in a straight line inside the housing 2 and leads through a fastening opening in the first transverse wall 26. Behind it, the pipeline bends approximately at right angles and leads through an opening in the shell 24 into the space 44 between the axially spaced exhaust gas treatment bodies 18 , 20th
- a first flap 46 is arranged in the first pipeline 8.
- the first flap 46 can be pivoted between an open position, in which it lies essentially parallel to the flow direction of the exhaust gas, and a closed position, in which it is essentially perpendicular to the exhaust gas flow direction. In order to illustrate this, an intermediate position is drawn in the drawing.
- a second flap 48 is arranged in the second pipeline 10. The second flap 48 can be pivoted between an open position and a closed position, analogously to that described for the first flap 46.
- the described exhaust system without the branch 16 and the second pipeline 10 including its continuation up to the space 44 between the two exhaust gas treatment bodies 18, 20, you have a main flow path of the exhaust system in front of you, formed by the first pipeline 8, the one before described flow path area through the muffler 32, the subsequent flow path area first through the first exhaust treatment body 18, then through the space 44, then through the second exhaust treatment body 20, and finally through the third pipeline 12, usually with rear silencer, to the outlet end.
- the second pipeline 10 including its continuation within the housing 2 to the space 44 between the two exhaust gas treatment bodies 18, 20, forms a bypass flow path.
- the section of the main flow path described above bridged by the bypass flow path thus extends from the branch 16 to the space 44.
- the first flap 46 When the internal combustion engine, to which the described exhaust system belongs, is started in the cold state or in the non-operating state, the first flap 46 is in its closed position and the second flap 48 is in its open position. Except for this, the exhaust gas flows of a smaller leakage flow past the first flap 46 despite its closed position, exclusively through the second pipeline 10 or the bypass flow path.
- the exhaust gas bypasses the muffler 32 and the first exhaust gas treatment body 18. It flows through the second exhaust gas treatment body 20, where the gaseous pollutants contained are at least largely made harmless, as mentioned in the introduction to the description. Since the exhaust gas flows in the most direct way to the second exhaust gas treatment body 20, the latter is optimally heated to its desired minimum working temperature.
- the second pipeline 10 has a significantly smaller diameter than the first pipeline 8, so that the heat-emitting surface of the second pipeline 10 is significantly smaller than the surface of the first pipeline 8 that emits heat when flowing through, which further reduces the heat losses brings the exhaust gas to the environment.
- the shell 24 is spaced on all sides to the peripheral wall 4 of the housing 2, so that with the exception of heat conduction through the transverse walls 26, 28 the heat losses from the shell 24 to the environment are very low.
- the first flap 46 is opened and the second flap 48 is closed. Now all of the exhaust gas - with the exception of a certain amount of leakage flow past the closed second flap 48 - flows through the section of the main flow path described further above as if the bypass flow path were not present. Now the muffler 32 comes into full operation, the two exhaust gas treatment bodies 18, 20 are flowed through in succession with the result of optimal pollutant reduction. The first exhaust gas treatment body 18 now also heats up rapidly.
- the two exhaust gas treatment bodies 18, 20 do not necessarily have to be arranged one after the other in the flow direction, as is the case in the exemplary embodiment described. Instead, the exhaust gas treatment bodies 18, 20 can be arranged in parallel in terms of flow, for example one above the other in the drawing figure.
- the second pipeline 10 can open into the space in front of the two exhaust gas treatment bodies 18, 20 of the left chamber 36.
- a flap would have to be provided in one of these two exhaust gas ducts. If this flap is closed, the exhaust gas treatment body associated with this exhaust gas duct is not directly flowed through.
- a temperature sensor arranged, for example, behind the second exhaust gas treatment body 20 can be provided. If the temperature detected by this temperature sensor is a little above the minimum working temperature of the exhaust gas treatment body, the second exhaust gas treatment body 20 has certainly reached its minimum working temperature. A corresponding signal is sent to a control unit, which then triggers the flaps 46, 48 to be changed over by means of suitable drives.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4244614 | 1992-12-31 | ||
DE4244614A DE4244614A1 (de) | 1992-12-31 | 1992-12-31 | Abgasanlage für Verbrennungsmotoren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0604992A1 true EP0604992A1 (fr) | 1994-07-06 |
EP0604992B1 EP0604992B1 (fr) | 1996-05-22 |
Family
ID=6476874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93121040A Expired - Lifetime EP0604992B1 (fr) | 1992-12-31 | 1993-12-28 | Dispositif d'échappement pour moteur à combustion interne |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0604992B1 (fr) |
DE (2) | DE4244614A1 (fr) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0939207A1 (fr) * | 1998-02-27 | 1999-09-01 | Institut Francais Du Petrole | Nouvel élément catalytique destiné au traitement des gaz d'échappement d'un moteur à combustion interne |
US6583214B1 (en) | 1999-04-01 | 2003-06-24 | Basf Coatings Ag | Aqueous coating material that is cured thermally and/or by actinic radiation, and its use |
US6747091B1 (en) | 1999-02-25 | 2004-06-08 | Basf Coatings Ag | Powder-slurry that can be hardened by actinic radiation or optionally by thermal means, method for producing said slurry and use of the same |
US6797771B2 (en) | 2000-02-02 | 2004-09-28 | Basf Coatings Ag | Aqueous composition that can be hardened physically, thermally or thermally and with actinic radiation and the derivatives and production thereof |
GB2414199A (en) * | 2004-05-22 | 2005-11-23 | Ford Global Tech Llc | An exhaust system for an engine |
DE19826284B4 (de) * | 1997-06-19 | 2009-07-30 | Volkswagen Ag | Anordnung für eine Kfz-Abgasanlage mit Katalysator |
DE102008017356A1 (de) | 2008-04-04 | 2009-10-15 | Airbus Deutschland Gmbh | Nachleuchtende Beschichtung für Innenkabinen |
DE102008054283A1 (de) | 2008-11-03 | 2010-06-02 | Basf Coatings Japan Ltd., Yokohama | Farb- und/oder effektgebende Mehrschichtlackierungen mit pigmentfreien Lackierungen als Füller-Ersatz, ihre Herstellung und Verwendung |
US7855266B2 (en) | 1999-11-05 | 2010-12-21 | Basf Coatings Ag | Method for multilayer coatings with self-crosslinking graft polyurethane copolymers, self-crosslinking polyurethanes and graft copolymers thereof |
US8147923B2 (en) | 2001-06-27 | 2012-04-03 | Basf Coatings Gmbh | Method for producing coatings from coating materials that can be cured by the action of heat or actinic radiation |
CN102536387A (zh) * | 2011-09-02 | 2012-07-04 | 浙江乐恒动力科技有限公司 | 一种分段式内燃机排气消声器 |
CN103362599A (zh) * | 2013-08-01 | 2013-10-23 | 北京汽车股份有限公司 | 排气噪声调节系统、排气噪声调节方法及车辆 |
DE102014007805A1 (de) | 2014-05-27 | 2015-12-03 | WindplusSonne GmbH | Solarabsorber, Verfahren zu seiner Herstellung und seine Verwendung |
DE102014013600A1 (de) | 2014-09-13 | 2016-03-17 | WindplusSonne GmbH | Solarabsorber, Verfahren zu seiner Herstellung und seine Verwendung |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005007090A1 (de) * | 2005-02-16 | 2006-08-24 | Bayerische Motoren Werke Ag | Prüfstand |
DE102010008277B4 (de) * | 2010-02-17 | 2023-10-12 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Abgasanlage einer Brennkraftmaschine |
JP7156902B2 (ja) * | 2018-10-24 | 2022-10-19 | マレリ株式会社 | マフラ |
Citations (4)
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DE1476508A1 (de) * | 1966-11-10 | 1970-03-26 | Eberspaecher J | Anordnung zur Abgasentgiftung vorzugsweise bei Brennkraftmaschinen |
CA1262869A (fr) * | 1988-06-23 | 1989-11-14 | Glen Knight | Echappement a combinaison de silencieux et convertisseur catalytique |
WO1992002715A1 (fr) * | 1990-08-04 | 1992-02-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Systeme d'echappement des gaz dans un moteur a combustion interne |
DE4218523C1 (en) * | 1992-06-05 | 1993-04-15 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Catalyst appts. allowing easy operation of temp. - includes main exhaust gas line, thin by=pass line, exhaust gas line and control unit |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9017762U1 (fr) * | 1990-11-14 | 1992-03-05 | Walker Deutschland Gmbh, 6806 Viernheim, De |
-
1992
- 1992-12-31 DE DE4244614A patent/DE4244614A1/de not_active Withdrawn
-
1993
- 1993-12-28 DE DE59302688T patent/DE59302688D1/de not_active Expired - Fee Related
- 1993-12-28 EP EP93121040A patent/EP0604992B1/fr not_active Expired - Lifetime
Patent Citations (4)
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DE1476508A1 (de) * | 1966-11-10 | 1970-03-26 | Eberspaecher J | Anordnung zur Abgasentgiftung vorzugsweise bei Brennkraftmaschinen |
CA1262869A (fr) * | 1988-06-23 | 1989-11-14 | Glen Knight | Echappement a combinaison de silencieux et convertisseur catalytique |
WO1992002715A1 (fr) * | 1990-08-04 | 1992-02-20 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Systeme d'echappement des gaz dans un moteur a combustion interne |
DE4218523C1 (en) * | 1992-06-05 | 1993-04-15 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Catalyst appts. allowing easy operation of temp. - includes main exhaust gas line, thin by=pass line, exhaust gas line and control unit |
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DE19826284B4 (de) * | 1997-06-19 | 2009-07-30 | Volkswagen Ag | Anordnung für eine Kfz-Abgasanlage mit Katalysator |
EP0939207A1 (fr) * | 1998-02-27 | 1999-09-01 | Institut Francais Du Petrole | Nouvel élément catalytique destiné au traitement des gaz d'échappement d'un moteur à combustion interne |
US6747091B1 (en) | 1999-02-25 | 2004-06-08 | Basf Coatings Ag | Powder-slurry that can be hardened by actinic radiation or optionally by thermal means, method for producing said slurry and use of the same |
US6583214B1 (en) | 1999-04-01 | 2003-06-24 | Basf Coatings Ag | Aqueous coating material that is cured thermally and/or by actinic radiation, and its use |
US7855266B2 (en) | 1999-11-05 | 2010-12-21 | Basf Coatings Ag | Method for multilayer coatings with self-crosslinking graft polyurethane copolymers, self-crosslinking polyurethanes and graft copolymers thereof |
US6797771B2 (en) | 2000-02-02 | 2004-09-28 | Basf Coatings Ag | Aqueous composition that can be hardened physically, thermally or thermally and with actinic radiation and the derivatives and production thereof |
US8147923B2 (en) | 2001-06-27 | 2012-04-03 | Basf Coatings Gmbh | Method for producing coatings from coating materials that can be cured by the action of heat or actinic radiation |
GB2414199A (en) * | 2004-05-22 | 2005-11-23 | Ford Global Tech Llc | An exhaust system for an engine |
GB2414199B (en) * | 2004-05-22 | 2007-10-24 | Ford Global Tech Llc | An exhaust system for an engine |
US9243151B2 (en) | 2008-04-04 | 2016-01-26 | Airbus Operations Gmbh | Afterglow coating for cabins |
DE102008017356A1 (de) | 2008-04-04 | 2009-10-15 | Airbus Deutschland Gmbh | Nachleuchtende Beschichtung für Innenkabinen |
DE102008054283A1 (de) | 2008-11-03 | 2010-06-02 | Basf Coatings Japan Ltd., Yokohama | Farb- und/oder effektgebende Mehrschichtlackierungen mit pigmentfreien Lackierungen als Füller-Ersatz, ihre Herstellung und Verwendung |
CN102536387A (zh) * | 2011-09-02 | 2012-07-04 | 浙江乐恒动力科技有限公司 | 一种分段式内燃机排气消声器 |
CN103362599A (zh) * | 2013-08-01 | 2013-10-23 | 北京汽车股份有限公司 | 排气噪声调节系统、排气噪声调节方法及车辆 |
CN103362599B (zh) * | 2013-08-01 | 2015-10-14 | 北京汽车研究总院有限公司 | 排气噪声调节系统、排气噪声调节方法及车辆 |
DE102014007805A1 (de) | 2014-05-27 | 2015-12-03 | WindplusSonne GmbH | Solarabsorber, Verfahren zu seiner Herstellung und seine Verwendung |
DE102014013600A1 (de) | 2014-09-13 | 2016-03-17 | WindplusSonne GmbH | Solarabsorber, Verfahren zu seiner Herstellung und seine Verwendung |
Also Published As
Publication number | Publication date |
---|---|
DE59302688D1 (de) | 1996-06-27 |
DE4244614A1 (de) | 1994-07-07 |
EP0604992B1 (fr) | 1996-05-22 |
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