WO2023198288A1 - Abgasschalldämpferanlage, geschütztes fahrzeug und verfahren - Google Patents
Abgasschalldämpferanlage, geschütztes fahrzeug und verfahren Download PDFInfo
- Publication number
- WO2023198288A1 WO2023198288A1 PCT/EP2022/059981 EP2022059981W WO2023198288A1 WO 2023198288 A1 WO2023198288 A1 WO 2023198288A1 EP 2022059981 W EP2022059981 W EP 2022059981W WO 2023198288 A1 WO2023198288 A1 WO 2023198288A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust silencer
- cooling air
- converter device
- heat
- exhaust
- Prior art date
Links
- 230000003584 silencer Effects 0.000 title claims abstract description 245
- 238000000034 method Methods 0.000 title claims description 19
- 238000001816 cooling Methods 0.000 claims abstract description 155
- 239000007789 gas Substances 0.000 description 106
- 230000001105 regulatory effect Effects 0.000 description 28
- 238000002485 combustion reaction Methods 0.000 description 23
- 230000005855 radiation Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 238000009423 ventilation Methods 0.000 description 8
- 238000004146 energy storage Methods 0.000 description 7
- UQMRAFJOBWOFNS-UHFFFAOYSA-N butyl 2-(2,4-dichlorophenoxy)acetate Chemical compound CCCCOC(=O)COC1=CC=C(Cl)C=C1Cl UQMRAFJOBWOFNS-UHFFFAOYSA-N 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000005678 Seebeck effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 241001415801 Sulidae Species 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 210000003734 kidney Anatomy 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000001931 thermography Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- 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
-
- 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
- F01N3/05—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of air, e.g. by mixing exhaust with 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
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
- F01N5/025—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat the device being thermoelectric generators
-
- 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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- 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
- F01N2240/12—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 thermal reactor
-
- 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
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
Definitions
- the present invention relates to an exhaust silencer system for a protected vehicle, a protected vehicle with such an exhaust silencer system and a method for operating such an exhaust silencer system.
- a problem that can arise is the removal of hot exhaust gases from an internal combustion engine from the vehicle. Due to mostly short and direct exhaust paths, a so-called hotspot can occur at the point where an exhaust gas exits the vehicle, which is only slightly colder than an exit temperature of the exhaust gas from the internal combustion engine itself. In addition, the exhaust system also heats surrounding components of the vehicle and thus also the vehicle shell itself.
- This heating creates a pattern that is characteristic of each type of vehicle, in particular a characteristic heat signature, which enemy reconnaissance aircraft can use to determine exactly the type of vehicle.
- the combustion engine does not run throughout the entire operation of the vehicle, but rather goes through a start-stop cycle as needed. This creates the problem of heat accumulating again and again in an exhaust pipe, which heats up disproportionately and thus increases the hotspot problem.
- an object of the present invention is to provide an improved silencer system for a protected vehicle.
- an exhaust silencer system for a protected vehicle comprises an exhaust silencer, a cooling air duct housing attached to the exhaust silencer, and an electrothermal converter device attached to the outside of the exhaust silencer and inside the cooling air duct housing for actively extracting heat from the exhaust silencer, which the converter device emits to cooling air flowing through the cooling air duct housing in order to achieve a Influencing the heat signature of the exhaust silencer system.
- the heat signature of the exhaust silencer system can be influenced or changed with the help of the converter device, a clear identification of the vehicle type of a vehicle with such an exhaust silencer system is no longer possible.
- the exhaust silencer system therefore contributes to the survivability of the vehicle and its crew members. With the help of the exhaust silencer system, it can be actively prevented that thermal hotspots on the vehicle reveal the position and identity of the vehicle.
- the exhaust silencer system can in particular be a rear silencer.
- the exhaust silencer system can be arranged, for example, in a rear area, a front area or a side area of the vehicle.
- the exhaust silencer is in particular a resonance exhaust silencer.
- the exhaust silencer can also be an absorption exhaust silencer.
- the exhaust silencer is preferably cuboid or cylindrical. builds and includes an exhaust gas supply pipe for supplying exhaust gas from an internal combustion engine to the exhaust silencer and an exhaust gas discharge pipe for discharging the exhaust gas from the exhaust silencer.
- the exhaust silencer encloses a volume which is preferably divided into several chambers.
- the exhaust gas supply pipe opens into one of the chambers and the exhaust gas discharge pipe opens into another of the chambers.
- the exhaust gas thus flows from the exhaust gas supply pipe through the chamber to the exhaust gas discharge pipe, with the sound being reflected in the chambers. This achieves a noise reduction.
- the exhaust silencer may include a cover facing away from a surface on which the vehicle is traveling, a floor facing the surface, two side walls facing each other, a front wall and a rear wall.
- the exhaust silencer can be made of sheet steel, in particular sheet steel.
- the cooling air guide housing encloses or envelops the exhaust silencer at least in sections.
- the cooling air guide housing covers one of the side walls and the bottom of the exhaust silencer.
- the cooling air guide housing can also completely enclose or envelop the exhaust silencer.
- a cooling air duct in which the converter device is placed is formed between the exhaust silencer and the cooling air guide housing.
- the cooling air flows through the cooling air duct.
- the cooling air guide housing is in particular firmly connected to the exhaust silencer.
- the cooling air guide housing is riveted, screwed or welded to the exhaust silencer.
- the fact that the converter device is attached "on the outside" of the exhaust silencer means in the present case that the converter device is not arranged in the volume enclosed by the exhaust silencer, but outside the volume, for example on one of the side walls and / or the bottom of the exhaust silencer.
- “within” the cooling air duct housing means in particular that the converter device is in the previously established mentioned cooling air duct is placed. This means that the cooling air guide housing covers the converter device.
- the exhaust silencer system can include several converter devices. For example, a separate converter device is placed on the floor and on one of the side walls.
- An “electrothermal converter device” is currently understood to mean a component or a device which is designed to transport heat by supplying electrical energy or to convert heat into electrical energy.
- An example of such a converter device is a so-called Peltier element.
- a control and/or regulating device is preferably provided to control the converter device.
- the fact that the converter device “actively” removes the heat from the exhaust silencer means in the present case that energy, in particular electrical energy, is supplied to the converter device so that the converter device removes the heat from the exhaust silencer.
- the exhaust silencer itself is heated by the exhaust gas. The converter device thus removes the heat from the exhaust gas indirectly via the exhaust silencer.
- the “heat signature” of the exhaust silencer system can be understood to mean the thermal radiation, in particular the infrared radiation, which the exhaust silencer system emits and which can be detected in particular by a photoreceiver of a thermal imaging device and displayed on a screen, for example.
- the heat signature arises in particular because the exhaust silencer system emits heat, particularly in the form of infrared radiation.
- the heat signature also results from heating of components of the vehicle surrounding the exhaust silencer system, which also emit heat.
- the heat signature may be characteristic of a particular type of vehicle. This characteristic results from a two-dimensional geometry, in particular an outline, the heat signature and a pattern of the heat signature.
- a “pattern” is understood to mean that the heat signature is areas with high levels of heat radiation Has areas with heat radiation that is smaller than that of the first-mentioned areas.
- the heat signature can include any number of different areas that have different heat flows or different radiation intensities.
- the heat signature is “influenced” or “changed” is to be understood in particular as meaning that the emitted thermal radiation is reduced, for example, or that it is no longer emitted in certain characteristic areas of the vehicle, for example.
- the two-dimensional geometry and/or the pattern of the heat signature can be influenced.
- a thermal signature reduction or signature control can be achieved by influencing or changing the heat signature.
- the cooling air can, for example, be pressed through the cooling air guide housing by the wind generated when the vehicle is moving.
- a ventilation device can also be provided, which forcibly allows the cooling air to flow through the cooling air guide housing. This has the advantage that the cooling air continues to flow through the cooling air guide housing even when the vehicle is at a standstill and/or the internal combustion engine is at a standstill.
- the ventilation device can also be controlled by the control and/or regulating device.
- the converter device can be switched from a first operating state, in which the converter device releases the heat to the cooling air flowing through the cooling air guide housing, into a second operating state, in that the converter device transfers a heat flow from a hot side of the converter device facing the exhaust gas silencer to one facing away from the exhaust gas silencer Cold side of the converter device interrupts.
- the exhaust silencer system includes the aforementioned control and/or regulating device.
- the control and/or regulating device is suitable, for example, for energizing the converter device.
- the control and/or regulating device can include a computer unit.
- the converter device comprises a plurality of converter elements, each converter element having a hot side and a cold side.
- the hot side can also be referred to as the hot side of the converter device and the cold side can also be referred to as the cold side of the converter device.
- a voltage applied to the converter device in the first operating state is reversed, so that the converter device no longer conducts the heat away from the exhaust silencer, but rather interrupts the heat flow.
- the converter device can supply heat to the exhaust silencer in the second operating state.
- the converter device can absorb heat from the cooling air in the second operating state and deliver it to the exhaust silencer. In the second operating state, this prevents the exhaust silencer from releasing heat.
- the heat is particularly actively retained in the exhaust silencer with the aid of the converter device. This is particularly advantageous if the vehicle is a hybrid vehicle and the internal combustion engine does not run constantly.
- the converter device can be switched from the first operating state or from the second operating state into a third operating state, in which the converter device converts thermal energy into electrical energy with the aid of a temperature difference between the hot side of the converter device and the cold side of the converter device.
- This switching can also be done with the help of the control and/or regulating device.
- the converter device also removes heat from the exhaust silencer in the third operating state. However, less heat is removed in the third operating state than in the first operating state.
- no additional electrical energy is used to extract the heat.
- the electrical energy obtained in the third operating state can be fed into an energy storage device, in particular into an accumulator, of the vehicle.
- the conversion of thermal energy into electrical energy takes place with the help of the so-called called Seebeck effect. This means that part of the energy that is converted into heat can be recovered.
- this effect can be used in particular to extend purely electric operation. This can, for example, extend the duration of use of the vehicle.
- the converter device comprises a plurality of electrothermal converter elements that can be individually controlled in order to generate a predetermined pattern in the heat signature of the exhaust silencer system.
- the converter elements are preferably Peltier elements.
- the transducer elements can, for example, each have a dimension of 20 to 90 mm x 20 to 90 mm with a thickness of 3 to 5 mm.
- the fact that the converter elements can be controlled “individually” means in the present case that each converter element can be controlled, for example energized, independently of all other converter elements.
- any converter elements can be switched into any operating states using the control and/or regulating device.
- the specified pattern can, for example, be a heat signature of another vehicle whose heat signature is to be simulated.
- the converter elements of the converter device are preferably arranged in a grid shape, pattern shape or checkerboard shape. This means that the converter elements are placed in rows and columns. The entirety of all converter elements together forms the converter device.
- the converter elements can be controlled in such a way that the heat signature of the exhaust silencer system adapts to a heat signature of an environment of the exhaust silencer system.
- the heat signature of the exhaust silencer system can adapt to the environment of the vehicle and/or to a surface on which the vehicle is moving.
- the heat signature of the exhaust silencer system can adapt to a building or another vehicle from which the vehicle with the exhaust silencer system is located. This is Good camouflage of the vehicle is possible.
- the exhaust silencer system can include a sensor system that can detect the heat signature of the environment and/or the surface.
- the sensor system can include, for example, an infrared sensor.
- the sensor system can provide the control and/or regulating device with sensor signals. The control and/or regulating device can then control the converter device or the individual converter elements based on the sensor signals in such a way that the heat signature of the exhaust silencer system adapts to the heat signature of the environment and/or the surface.
- the converter device comprises a heat sink which projects into a cooling air channel provided between the exhaust silencer and the cooling air guide housing.
- the converter elements preferably have a common heat sink. However, each converter element can also have its own heat sink.
- the heat sink is connected to the converter elements in a thermally conductive manner, in particular with the aid of a layer of a material with high thermal conductivity, in particular a layer of thermal paste.
- the converter elements are connected to the exhaust silencer with their hot side using a further layer of material with high thermal conductivity, in particular a further layer of thermal paste.
- the heat sink is preferably made of aluminum.
- the heat sink includes cooling fins through which the cooling air flows. The cooling fins are arranged in such a way that the cooling air flows through them parallel to the cooling fins.
- the cooling fins extend from a plate-shaped base section of the heat sink. The base section is connected to the converter elements in a heat-conducting manner.
- the converter device is attached to a floor and to a side wall of the exhaust silencer.
- the transducer elements that are arranged on the floor and the transducer elements that are arranged on the side wall can each comprise their own heat sink.
- the converter device can also be connected to the Ceiling, the second side wall, the front and / or the back of the exhaust silencer.
- the converter device is attached to those areas of the exhaust silencer that face the outside of the vehicle.
- the exhaust silencer comprises an exhaust gas outlet
- the cooling air guide housing comprises a cooling air outlet
- the cooling air outlet is guided at least in sections around the exhaust gas outlet.
- the exhaust gas outlet is circular.
- the cooling air outlet can be curved in an arc or kidney shape.
- the cooling air emerging from the cooling air outlet which is colder than the cooled exhaust gas, thus forms a curtain or a jacket flow around the outflowing cooled exhaust gas.
- a signature reduction at the exhaust gas outlet can be achieved again.
- the cooling air and the exhaust gas therefore only mix at a certain distance behind the exhaust gas outlet. The formation of a hotspot is prevented.
- the cooling air guide housing comprises a cooling air distributor for uniformly distributing the cooling air to the converter device, wherein the cooling air distributor can be supplied with the cooling air using a cooling air inlet of the cooling air guide housing.
- the cooling air guide housing also includes a cooling air collector, which supplies the cooling air to the cooling air outlet after flowing around the heat sink or heat sinks.
- the cooling air can be supplied to the cooling air inlet, for example, with the aid of the previously mentioned ventilation device.
- the control and/or regulating device can also be suitable for controlling the ventilation device so that, for example, it can be switched on and off and/or a volume flow of the cooling air can be regulated.
- the exhaust silencer system is arranged in particular in a front area, a rear area or a side area of the vehicle.
- the exhaust silencer system is placed under a floor of the vehicle.
- the fact that the vehicle is "protected” means in this case that the vehicle is protected against shelling, booby traps, improvised explosive devices (IEDs), mines or the like.
- the vehicle is preferably a wheeled vehicle.
- the vehicle can also be a tracked vehicle.
- the vehicle is preferably a tub vehicle.
- the vehicle preferably includes a passenger cell which is protected, in particular armored, and can accommodate crew members.
- the exhaust silencer system includes an exhaust silencer, a cooling air duct housing attached to the exhaust silencer, and an electro-thermal converter device attached to the outside of the exhaust silencer and inside the cooling air duct housing.
- the method has the following steps: a) actively removing heat from the exhaust silencer using the converter device, and b) releasing the heat to cooling air flowing through the cooling air guide housing using the converter device, whereby a heat signature of the exhaust silencer system is influenced.
- the exhaust gas is cooled, which results in a signature reduction, for example.
- the fact that the converter device “actively” removes the heat means, in particular, that the converter device is supplied with energy, in particular electrical energy, for transporting the heat from the exhaust silencer to the cooling air.
- the heat can be dissipated “passively”, for example through thermal radiation.
- “influencing” means in particular that the heat signature is controlled and/or reduced.
- the converter device is switched from a first operating state, in which the converter device releases the heat to the cooling air flowing through the cooling air guide housing, into a second operating state.
- a first operating state in which the converter device releases the heat to the cooling air flowing through the cooling air guide housing
- a second operating state could be switched by interrupting a heat flow from the converter device from a hot side of the converter device facing the exhaust silencer to a cold side of the converter device facing away from the exhaust silencer.
- the heat flow from the hot side to the cold side is interrupted by reversing the polarity of a voltage applied to the converter device in the first operating state.
- the converter device can be switched from the first operating state or from the second operating state into a third operating state, in which thermal energy is converted into electrical energy by the converter device with the aid of a temperature difference between the hot side of the converter device and the cold side of the converter device.
- the so-called Seebeck effect is used for this.
- the electrical energy can be temporarily stored in the vehicle's energy storage device. This makes it possible, particularly in the event that the vehicle is a hybrid vehicle, for the period of use of the vehicle to be extended.
- the energy storage can also be used to supply energy to the control and/or regulating device and the converter device.
- the converter device comprises a plurality of electrothermal converter elements that are individually controlled so that a predetermined pattern is generated in the heat signature of the exhaust silencer system.
- the converter elements are controlled individually using the previously mentioned control and/or regulating device. Each converter element can therefore be can be switched to the first operating state, the second operating state or the third operating state.
- the specified pattern can, for example, be stored on a data carrier of the control and/or regulating device.
- the converter elements are controlled in such a way that the heat signature of the exhaust silencer system is adapted to a heat signature of an environment of the exhaust silencer system.
- the heat signature of the exhaust silencer system can also be adapted to the surface on which the vehicle is moving.
- the heat signature of the exhaust silencer system can be adapted to a building or a vehicle in front of which the vehicle with the exhaust silencer system is parked. This makes excellent camouflage of the vehicle possible.
- “adapting” means in particular that the heat signature of the exhaust silencer system is adjusted to the heat signature of the environment of the exhaust silencer system.
- the control and/or regulating device can control the converter device based on sensor signals from the sensors of the exhaust silencer system.
- exhaust silencer system the protected vehicle and/or the method also include combinations not explicitly mentioned above or below with regard to the implementation. Examples of features or embodiments described. The expert will also add individual aspects as improvements or additions to the respective basic form of the exhaust silencer system, the protected vehicle and/or the process.
- Fig. 1 shows a schematic side view of an embodiment of a protected vehicle!
- Fig. 2 shows a schematic perspective view of an embodiment of an exhaust silencer system for the protected vehicle according to Fig. 1!
- Fig. 3 shows a further schematic perspective view of the exhaust silencer system according to Fig. 2;
- Fig. 4 shows a schematic rear view of the exhaust silencer system according to Fig. 2;
- Fig. 5 shows a greatly simplified schematic sectional view of the exhaust silencer system according to Fig. 2!
- Fig. 6 shows a schematic block diagram of an embodiment of a method for operating the exhaust silencer system according to Fig. 2.
- identical or functionally identical elements have been given the same reference numbers unless otherwise stated.
- the protected vehicle 1 shows a schematic side view of an embodiment of a protected vehicle 1.
- the protected vehicle 1 is hereinafter referred to simply as a vehicle.
- the vehicle 1 can be a military vehicle, in particular a military commercial vehicle.
- the vehicle 1 can be a tub vehicle.
- the vehicle 1 can be armed or unarmed.
- the vehicle 1 includes a protected passenger cell 2.
- the passenger cell 2 is protected against shelling, booby traps, improvised explosive or incendiary devices (IEDs), mines or the like.
- the passenger cell 2 encloses an interior I in which crew members can stay.
- the interior I of the passenger cell 2 can be entered and exited from an environment U of the vehicle 1 via hatches or doors.
- the vehicle 1 can be a wheeled vehicle. Alternatively, the vehicle 1 can also be a tracked vehicle.
- the vehicle 1 includes several wheel axles on which wheels 3, 4 are provided.
- the number of wheel axles is basically arbitrary. For example, two, three or four wheel axles can be provided. At least one of the wheel axles is steered. Several wheel axles can also be steered.
- the vehicle 1 preferably includes an all-wheel drive. This means that all wheel axles are powered.
- the vehicle 1 is suitable for off-road use and can therefore also be referred to as an off-road vehicle.
- the vehicle 1 has an internal combustion engine 5 for driving the wheel axles or the wheels 3, 4.
- the vehicle 1 can only be driven by the internal combustion engine 5.
- the vehicle 1 can also be a hybrid vehicle.
- the vehicle 1 includes one or more electric motors in addition to the internal combustion engine 5.
- the internal combustion engine 5 and the electric motor or motors are part of a hybrid drive train or hybrid drive train of the vehicle 1.
- the surface O can be a road, a gravel road or any other terrain.
- the vehicle 1 can have a reverse gear, so that it can also move against the direction of travel F.
- the internal combustion engine 5 is assigned an exhaust system with an exhaust silencer system 6.
- the exhaust silencer system 6 can be a rear silencer.
- the exhaust silencer system 6 can be arranged on the side of the passenger cell 2, in a front area or in a rear area of the passenger cell 2.
- the exhaust silencer system 6 can be covered at least in sections by an outer shell, for example by a side wall, of the passenger cell 2.
- the exhaust silencer system 6 generates a heat signature S or has a heat signature S.
- the heat signature S arises because the exhaust silencer system 6 emits heat, in particular in the form of infrared radiation. Furthermore, the heat signature S also results from a heating of components of the vehicle 1 surrounding the exhaust silencer system 6, which also emit heat.
- the heat signature S is characteristic of the vehicle 1. This means that the vehicle 1, in particular a vehicle type of the vehicle 1, can be identified using the heat signature S.
- the heat signature S is shown in a very simplified form as a rectangle.
- the heat signature S can have any geometry or any outline. Within this aforementioned rectangle, there are areas that emit more heat and areas that emit less heat compared to the former areas. This means in particular that there are areas in which the heat flow is higher and areas in which the heat flow is lower compared to the first-mentioned areas.
- the heat signature S therefore has a characteristic pattern.
- the heat signature S can be detected, for example, using an infrared sensor and displayed on a screen.
- the vehicle 1 is assigned a coordinate system with a width direction or x-direction x, a vertical direction or y-direction y and a depth direction or z-direction z.
- the directions x, y, z are oriented perpendicular to each other.
- a direction of gravity g can be oriented opposite to the y-direction y.
- the direction of gravity g is oriented perpendicular to the surface O.
- this can also include a noise signature, for example.
- the removal of hot exhaust gases from the internal combustion engine 5 from the vehicle 1 can be problematic. Due to the mostly short and direct exhaust paths, a so-called hotspot occurs at the location of an exhaust gas outlet, which is only immediately colder than an outlet temperature of the exhaust gas from the internal combustion engine 5 itself.
- the exhaust silencer system 6 also heats surrounding components and thus also the outer shell of the vehicle 1 itself. This heating creates a pattern of the heat signature S that is characteristic of the respective vehicle type, with the help of which enemy reconnaissance agents can precisely determine the vehicle type.
- FIG. 2 shows a schematic perspective view of an embodiment of an improved exhaust silencer system 6 for the vehicle 1.
- Fig. 3 shows a further schematic perspective view of the exhaust silencer system 6.
- Fig. 4 shows a schematic rear view of the exhaust silencer system 6 looking in the opposite direction x direction x.
- 5 shows a highly simplified schematic sectional view of the exhaust silencer system 6. Reference will be made to FIGS. 2 to 5 at the same time.
- the exhaust silencer system 6 can be arranged on the side of the vehicle 1, in a front area or in a rear area of the vehicle 1. This means that the exhaust silencer system 6 can basically be oriented anywhere in space. 2 to 5, however, it is assumed that the exhaust silencer system 6 extends in the direction of travel F or along the x-direction x.
- the exhaust silencer system 6 includes an exhaust silencer 7, which is essentially cuboid-shaped.
- the exhaust silencer 7 can be a rear silencer.
- the exhaust silencer 7 comprises a cover 8, which faces the passenger compartment 2, for example, and a base 9 arranged opposite the cover 8, which faces away from the passenger compartment 2 and faces the surface O, for example.
- the exhaust silencer 7 comprises two side walls 10, 11 arranged opposite one another, in particular a first side wall 10 and a second side wall 11.
- the first side wall 10 can, for example, face the passenger compartment 2 and the second side wall 11 can face the passenger compartment 2 be turned away.
- the exhaust silencer 7 is closed by a front wall 12 and a rear wall 13.
- the exhaust silencer 7 thus encloses a volume 14 (FIG. 5), which can be divided into several chambers.
- the exhaust silencer 7 is a resonance silencer.
- the exhaust silencer 7 further comprises an exhaust gas supply pipe 15, with the help of which hot exhaust gas A from the internal combustion engine 5 can be supplied to the exhaust silencer system 6.
- an exhaust gas supply pipe 15 Between the internal combustion engine 5 and the exhaust silencer system 6, further components of the aforementioned exhaust system of the vehicle 1 can be arranged, but these are not shown. These components can include, for example, a manifold attached to the internal combustion engine 5, a catalytic converter, a front silencer, a middle silencer or the like.
- the exhaust gas supply pipe 15 comprises an outer pipe 16 and an inner pipe 17 arranged coaxially with the outer pipe 16. An insulating air gap is provided between the outer pipe 16 and the inner pipe 17. This prevents the hot exhaust gas A from releasing heat to the environment U in the area of the exhaust gas supply pipe 15.
- the exhaust gas supply pipe 15 can also be single-walled and have insulation on the outside.
- the exhaust gas supply pipe 15, in particular only the inner pipe 17 of the exhaust gas supply pipe 15, is guided through the first side wall 10 into the exhaust gas silencer 7.
- the exhaust gas supply pipe 15 can also be guided into the exhaust gas silencer 7 through the front wall 12, for example.
- the exhaust gas supply pipe 15 comprises an exhaust gas inlet 18 through which the exhaust gas A flows into the exhaust gas supply pipe 15, in particular into the inner pipe 17.
- the exhaust gas silencer 7 includes an exhaust gas discharge pipe 19, which is led out of the exhaust gas silencer 7, for example on the rear wall 13.
- the exhaust gas supply pipe 15 and the exhaust gas discharge pipe 19 are not directly connected to one another.
- the volume 14 may be divided into a plurality of chambers.
- the exhaust gas supply pipe 15, in particular the inner pipe 17 of the exhaust gas supply pipe 15, opens into one of the chambers, and the exhaust gas discharge pipe 19 opens into another of the chambers.
- the exhaust gas A then flows from the exhaust gas supply pipe 15 via the individual chambers to the exhaust gas discharge pipe 19.
- the exhaust gas A is dammed up in the exhaust gas silencer 7 in order to homogenize a flow of the exhaust gas A.
- the sound is reflected in the chambers, on the lid 8, the base 9, the side walls 10, 11, the front wall 12 and the rear wall 13, which results in a sound reduction.
- the exhaust gas discharge pipe 19 includes an exhaust gas outlet 20 through which the exhaust gas A leaves the exhaust gas silencer 7 again.
- the exhaust gas silencer 7 is heated by the hot exhaust gas A.
- the exhaust silencer system 6 includes a cooling air guide housing 21, which is not shown in FIG. 3.
- the cooling air guide housing 21 is firmly connected to the exhaust silencer 7.
- the cooling air guide housing 21 is screwed, riveted or welded to the exhaust silencer 7.
- the cooling air guide housing 21 covers the bottom 9, the second side wall 11 and the front wall 12 at least in sections.
- the cooling air guide housing 21 comprises a side wall 22, which is arranged, for example, parallel to the second side wall 11 of the exhaust silencer 7 and at a distance from it. Furthermore, the cooling air guide housing 21 includes a floor 23, which is spaced apart from and parallel to the floor 9 of the exhaust silencer 7.
- the cooling air guide housing 21 can also be designed in such a way that it also envelops the cover 8 and/or the first side wall 10.
- the cooling air guide housing 21 comprises a cooling air distributor 24 for evenly distributing cooling air L, which is supplied to the cooling air distributor 24 via a cooling air inlet 25.
- the cooling air L can be supplied to the cooling air inlet 25, for example, passively by the wind when the vehicle 1 is moving in the direction of travel F.
- a ventilation device 26 is particularly preferred provided, which enables forced flow of the cooling air L through the cooling air guide housing 21.
- the ventilation device 26 can, for example, be an electrically driven fan, which supplies the cooling air L to the cooling air inlet 25 via suitable piping.
- the cooling air guide housing 21 further comprises a cooling air collector 27 with a cooling air outlet 28, from which the cooling air L emerges again from the cooling air guide housing 21.
- the cooling air outlet 28 is curved in a kidney shape or in an arc shape and runs at least in sections around the exhaust gas outlet 20 of the exhaust gas silencer 7.
- the cooling air L emerging from the cooling air outlet 28 forms a cooling air curtain which extends at least in sections around the hot exhaust gas A flowing out of the exhaust gas outlet 20 and which shields the exhaust gas A.
- a suitable mixing of the exhaust gas A with the cooling air L can only be achieved at a certain distance from the exhaust gas outlet 20.
- a cooling air channel 29 is formed between the exhaust silencer 7, in particular between the floor 9 and the second side wall 11 of the exhaust silencer 7, and the cooling air guide housing 21, through which the cooling air L flows.
- the cooling air guide housing 21 is shown only in a very simplified manner and does not cover the base 9.
- the exhaust silencer system 6 includes an electro-thermal converter device 30 attached to the outside of the exhaust silencer 7 and inside the cooling air guide housing 21.
- the converter device 30 is suitable for extracting heat W from the exhaust silencer 7 and thus indirectly from the exhaust gas A and releasing it to the cooling air L.
- the converter device 30 is also suitable for extracting heat W from the cooling air L and delivering it to the exhaust silencer 7.
- the converter device 30 can also be suitable for converting heat W into electrical energy using a temperature difference between the exhaust silencer 7 and the cooling air L.
- the converter device 30 is arranged in the cooling air duct 29.
- the converter device 30 covers, for example, the floor 9 and the second side wall 11 of the exhaust silencer 7 at least in sections.
- Two transducer devices 30 can be provided, one being placed on the floor 9 and the other on the second side wall 11. Furthermore, the converter device 30 can also be provided on the cover 8, the first side wall 10, the front wall 12 and/or the rear wall 13 of the exhaust silencer 7. In particular, the cover 8, the first side wall 10, the front wall 12 and/or the rear wall 13 can each also be assigned their own converter device 30.
- the converter device 30 comprises a plurality of electrothermal converter elements 31, of which only one is shown in FIG. 5.
- the number of converter elements 31 is basically arbitrary. Only one converter element 31 will be discussed below.
- the transducer element 31 has a dimension of 20 to 90 mm x 20 to 90 mm and a thickness of 3 to 5 mm.
- the converter element 31 includes a hot side 32, which faces the exhaust silencer 7, and a cold side 33, which faces away from the exhaust silencer 7.
- a layer of a material with high thermal conductivity 34 is provided between the hot side 32 and the exhaust silencer 7.
- the material with high thermal conductivity 34 ensures good heat transfer from the exhaust silencer 7 to the hot side 32.
- the term “material with high thermal conductivity” can be replaced by the term “thermal paste” and vice versa.
- a heat sink 35 is provided on the cold side 33 and projects into the cooling air duct 29.
- Each converter element 31 can have its own heat sink 35.
- a plurality of converter elements 31 preferably share a common heat sink 35.
- all converter elements 31 that are provided on the second side wall 11 can have a common heat sink 35.
- all transducer elements 31, which are provided on the base 9, can also comprise a common heat sink 35.
- the heat sink 35 comprises a plate-shaped base section 36 and a plurality of cooling fins 37 extending from the base section 36, between which the cooling air L flows.
- the heat sink 35 can be made of aluminum, for example.
- a further layer of the material with high thermal conductivity 38 is provided between the cold side 33 and the heat sink 35, in particular the base section 36 of the heat sink 35.
- the material with high thermal conductivity 38 ensures good heat transfer from the cold side 33 to the heat sink 35.
- the exhaust silencer system 6 further comprises a control and/or regulating device 39 for controlling the converter device 30.
- the control and/or regulating device 39 can also be suitable for controlling the ventilation device 26, for example switching it on and off and/or a volume flow of the cooling air L to regulate.
- the control and/or regulating device 39 is particularly suitable for controlling each converter element 31 individually.
- “individual” means in particular that the control and/or regulating device 39 can control each converter element 31 independently of all other converter elements 31, as will be explained below.
- the converter element 31 can be activated by the control and/or regulating device 39 applying a voltage to the converter element 31.
- the exhaust silencer system 6 can be covered at least in sections by an outer shell 40, in particular a side wall of the outer shell 40.
- the exhaust silencer 7 can heat the outer shell 40 at least in sections, whereby this heat radiates and can thus contribute to the heat signature S.
- the outer shell 40 can be open towards the surface O.
- heat signature can be understood to mean thermal radiation or infrared radiation, which can be detected and displayed by a photoreceiver of a thermal imaging device.
- each vehicle type of vehicle 1 has a characteristic heat signature S. Because the converter device 30 influences the heat signature S of the exhaust silencer system 6, in particular the exhaust silencer 7, either this characteristic assignment is no longer possible or the vehicle 1 can no longer be recognized at all. In this latter case, infrared camouflage takes place in the form of a stealth technology.
- the temperature T is plotted diagrammatically over the z-direction z.
- the hot exhaust gas A which has a temperature of up to 700 ° C, is passed through the exhaust gas supply pipe 15 into the exhaust gas silencer 7.
- the exhaust gas silencer 7 accumulates the exhaust gas A to homogenize the flow of the exhaust gas A, which causes the exhaust gas silencer 7 to heat up over the duration of operation of the internal combustion engine 5.
- a schematic curve of the temperature T shows in this area only a slight cooling of the temperature of the exhaust gas A from the exhaust gas supply pipe 15 to the side walls 10, 11 of the exhaust gas silencer 7.
- a first operating state which is shown in FIG. 5
- the converter element 31 is subjected to a voltage which increases the transport of heat W from the hot side 32 to the cold side 33.
- the converter element 31 releases the heat W via the heat sink 35 to the cooling air L flowing through the cooling air duct 29.
- 5 shows, a drop in the temperature T occurs via the converter element 31 and the cooling air duct 29, so that the cooling air guide housing 21 has a significantly lower temperature T than the exhaust gas A flowing into the exhaust silencer 7.
- the exhaust gas A or the exhaust gas silencer 7 is actively cooled.
- “Active” in the present case means that by applying the voltage to the converter element 31, the heat W is removed from the exhaust gas A or the exhaust gas silencer 7 and released to the cooling air L via the heat sink 35. “Active” also means in particular that energy is used to transport the heat W away from the exhaust silencer 7.
- the exhaust gas A is therefore actively cooled and, compared to an exhaust silencer system without such a converter device 30, exits the exhaust gas outlet 20 at a significantly lower temperature T.
- the heated cooling air L which is, however, still cooler than the cooled exhaust gas A, emerges from the cooling air outlet 28.
- the emerging cooling air L shields the warmer exhaust gas A in a curtain-like manner through the arcuate geometry of the cooling air outlet 28.
- the converter device 30 interrupts a heat flow from the hot side 32 to the cold side 33. This can be done by reversing the voltage applied to the converter element 31 in the first operating state. In particular, heat W can also be transferred from the cooling air L to the exhaust silencer 7 in the second operating state.
- the heat W is retained in the exhaust silencer 7 and therefore cannot heat the outer shell 40 of the vehicle 1. This is particularly advantageous in a hybrid vehicle in which the internal combustion engine 5 is operated in start-stop cycles.
- the converter device 30 can be switched from the first operating state or from the second operating state into a third operating state that differs from the first operating state and the second operating state, in which the converter device 30 can be switched with the aid of the Temperature difference between the hot side 32 and the cold side 33 converts thermal energy into electrical energy.
- the so-called Seebeck effect is used here.
- the converter element 31 acts as a thermoelectric generator, which converts the thermal energy into electrical energy due to the resulting temperature difference between the exhaust silencer 7 and the heat sink 35.
- the temperature of the exhaust gas A can also be reduced.
- the reduction in the temperature of the exhaust gas A is not as great in the third operating state as in the first operating state.
- the electrical energy obtained can be temporarily stored in an energy storage device 41, for example an accumulator, in the vehicle 1.
- the energy storage 41 can also be used to supply energy to the control and/or regulating device 39 and/or the converter device 30.
- the thermoelectric generator part of the energy that was converted into heat W can be recovered.
- this effect can be used in particular to extend the purely electric operation. This can, for example, advantageously extend the service life of the vehicle 1.
- the possibility of thermal signature reduction and / or control contributes significantly to the survivability of the vehicle 1 and its crew members. In this way, it can be actively prevented that thermal hotspots on the vehicle 1 reveal its position on the one hand and its identity on the other.
- the use of the exhaust silencer system 6 can therefore have a positive effect on both safety and the duration of use.
- the converter elements 31 can be controlled individually. It is therefore possible to generate a predetermined pattern in the heat signature S of the exhaust silencer 7 with the aid of the control and/or regulating device 39.
- the predetermined pattern can, for example, be a heat signature of another vehicle type stored in the control and/or regulating device 39. Thus deception about the identity of the vehicle 1 is possible.
- the heat signature S of the exhaust silencer system 6 can adapt to a building or another vehicle in front of which the vehicle 1 is standing.
- the exhaust silencer system 6 can include a sensor system 42, which can detect the heat signature of the environment U and/or the surface O.
- the sensor system 42 can include an infrared sensor.
- the sensor system 42 can provide the control and/or regulating device 39 with sensor signals.
- the control and/or regulating device 39 can then control the converter device 30 based on the sensor signals in such a way that the heat signature S of the exhaust silencer system 6 adapts to the heat signature of the environment U and/or the surface O.
- step S1 heat W is actively removed from the exhaust silencer 7 and thus from the exhaust gas A using the converter device 30.
- step S2 the heat W is given off to the cooling air L flowing through the cooling air guide housing 21. This is done with the help of the heat sink 35.
- the heat signature S of the exhaust silencer system 6 can be influenced.
- the active extraction of the heat W takes place in the first operating state of the converter device 30.
- the heat flow from the converter device 30 is interrupted from the hot side 32 of the converter device 30 facing the exhaust silencer 7 to the cold side 33 of the converter device 30 facing away from the exhaust silencer 7. This can be done in that a voltage with which the converter device 30 or the converter elements 31 is energized in the first operating state are reversed.
- heat W can also be transferred from the cooling air L to the exhaust silencer 7.
- thermal energy is converted into electrical energy with the aid of the converter device 30 due to the temperature difference between the hot side 32 of the converter device 30 and the cold side 33 of the converter device 30 or the converter elements 31.
- This electrical energy can be temporarily stored in the energy storage 41.
- a predetermined pattern can be generated in the heat signature S of the exhaust silencer system 6, in particular the exhaust silencer 7.
- the heat signature S of the exhaust silencer system 6 can be adapted to the heat signature of the environment U and/or the surface O. This allows the vehicle 1 to be camouflaged in infrared.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Claims
Priority Applications (3)
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PCT/EP2022/059981 WO2023198288A1 (de) | 2021-05-07 | 2022-04-14 | Abgasschalldämpferanlage, geschütztes fahrzeug und verfahren |
EP22722797.2A EP4334577A1 (de) | 2021-05-07 | 2022-04-14 | Abgasschalldämpferanlage, geschütztes fahrzeug und verfahren |
AU2022452744A AU2022452744A1 (en) | 2021-05-07 | 2022-04-14 | Exhaust gas muffler system, protected vehicle, and method |
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DE102021111928.6A DE102021111928A1 (de) | 2021-05-07 | 2021-05-07 | Abgasschalldämpferanlage, geschütztes Fahrzeug und Verfahren |
DE102021111928.6 | 2021-05-07 | ||
PCT/EP2022/059981 WO2023198288A1 (de) | 2021-05-07 | 2022-04-14 | Abgasschalldämpferanlage, geschütztes fahrzeug und verfahren |
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DE102005005078A1 (de) * | 2004-02-05 | 2005-09-08 | Toyota Jidosha K.K., Toyota | Thermoelektrischer Generator für eine Brennkraftmaschine |
DE102015205318A1 (de) * | 2015-03-24 | 2016-09-29 | Bayerische Motoren Werke Aktiengesellschaft | Schalldämpfer |
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JP2002325470A (ja) | 2001-04-23 | 2002-11-08 | Sango Co Ltd | 自動車用熱電発電装置 |
DE102006057662A1 (de) | 2006-12-07 | 2008-06-12 | Bayerische Motoren Werke Ag | Fahrzeug mit einem thermoelektrischen Generator |
JP5708606B2 (ja) | 2012-09-27 | 2015-04-30 | トヨタ自動車株式会社 | 熱電発電装置 |
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2021
- 2021-05-07 DE DE102021111928.6A patent/DE102021111928A1/de active Pending
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2022
- 2022-04-14 EP EP22722797.2A patent/EP4334577A1/de active Pending
- 2022-04-14 WO PCT/EP2022/059981 patent/WO2023198288A1/de active Application Filing
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102005005078A1 (de) * | 2004-02-05 | 2005-09-08 | Toyota Jidosha K.K., Toyota | Thermoelektrischer Generator für eine Brennkraftmaschine |
DE102015205318A1 (de) * | 2015-03-24 | 2016-09-29 | Bayerische Motoren Werke Aktiengesellschaft | Schalldämpfer |
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DE102021111928A1 (de) | 2022-11-10 |
AU2022452744A1 (en) | 2023-12-21 |
EP4334577A1 (de) | 2024-03-13 |
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