EP3631181A1 - Abgasleitungsanordnung für eine brennkraftmaschine - Google Patents
Abgasleitungsanordnung für eine brennkraftmaschineInfo
- Publication number
- EP3631181A1 EP3631181A1 EP18726982.4A EP18726982A EP3631181A1 EP 3631181 A1 EP3631181 A1 EP 3631181A1 EP 18726982 A EP18726982 A EP 18726982A EP 3631181 A1 EP3631181 A1 EP 3631181A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust pipe
- opening
- exhaust
- coupling element
- waveguide
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- 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
- F01N3/021—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 filters
-
- 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
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust 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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
- H01P5/103—Hollow-waveguide/coaxial-line transitions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2233—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in consumption-meter devices, e.g. electricity, gas or water meters
-
- 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
- F01N2260/26—Exhaust treating devices having provisions not otherwise provided for for preventing enter of dirt into the device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/12—Other sensor principles, e.g. using electro conductivity of substrate or radio frequency
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- Exhaust pipe arrangement for an internal combustion engine The present invention relates to an exhaust guide for an internal combustion engine, especially an exhaust pipe for an internal combustion engine, in the electromagnetic waves to the lower ⁇ investigation, arranged in the exhaust system the exhaust gas aftertreatment device can be coupled.
- cata- ⁇ catalysts such as SCR catalysts
- particulate filter such as diesel particulate filter to call.
- Diesel particulate filters are designed to capture the be ⁇ -sensitive particles or soot in the exhaust gas from the exhaust gas, so that they are not released into the environment. For a given loading of the particulate filter, the accumulated particles must be burnt to increase the storage capacity of the Par ⁇ tikelfilters again.
- the measurement of the charge state of the particle filter is often ⁇ times very complicated and usually very inaccurate. This can cause it frequent regeneration of the particulate filter come, but these are unnecessary due to a low load condition.
- From DE 10 2008 012 050 AI is known to detect the continuous time course of a catalyst loading or discharge contactless using a microwave array and make the catalyst state as an input to the engine ⁇ control available.
- microwave antennas are mounted upstream and / or downstream of the filter ceramics in such a way that they project into the exhaust gas stream.
- the antennas at least partially protrude into the exhaust stream and are thus exposed directly to the exhaust stream, which can lead to any particles in the exhaust gas being able to accumulate and deposit on the antennas. These deposited particles on the antennas may result in poorer and / or inefficient operation of the antennas.
- the present invention is at least partially based on the object to provide an exhaust pipe in which an exhaust aftertreatment device is located, which can be reliably monitored by means of coupled electromagnetic waves.
- the present invention is essentially based on the idea to couple electromagnetic waves by means of a coupling ⁇ elements into the exhaust pipe and thus into the exhaust aftertreatment ⁇ treatment plant.
- an opening in the exhaust pipe proceed, in or via which extends a coupling element coupled to the waveguide, which is designed to couple in the electromagnetic waves. Consequently, both the waveguide and the coupling element are arranged substantially outside the exhaust pipe, whereby it can be at least partially prevented that the waveguide and / or the coupling element are exposed directly to the exhaust gas and thus contaminated by the particles.
- an exhaust pipe arrangement for an internal combustion engine which comprises an exhaust pipe extending substantially along a longitudinal axis and designed to at least partially guide exhaust gas of the internal combustion engine, an opening provided in the exhaust pipe, which is arranged substantially radially to the longitudinal axis attached to the exhaust pipe coupling element that extends at least partially into or over the opening, a shield, which is externally attached to the exhaust pipe so that it substantially completely surrounds the opening, and having a waveguide which is coupled to the coupling element and is adapted to coupled by means of the coupling element electromagnetic waves in the shielding that the electromagnetic ⁇ tical waves are propagated through the opening in the exhaust pipe.
- the shielding housing attached from the outside to the exhaust pipe forms a cavity resonator in the interior thereof, in which a standing wave, usually with different modes, can form by resonance.
- a standing wave usually with different modes
- the electromagnetic waves forming in the shielding housing can then propagate through the opening in the exhaust gas line into the exhaust gas line and into the exhaust gas aftertreatment device.
- the exhaust pipe arrangement further comprises an exhaust gas aftertreatment device arranged in the exhaust pipe and designed to at least partially post-treat the exhaust gas flowing through the exhaust pipe.
- the opening in the region of the exhaust aftertreatment device is provided such that the electromagnetic waves coupled into the shielding housing by the waveguide can be propagated through the opening into the exhaust aftertreatment device.
- the electromagnetic waves can be coupled directly into the exhaust aftertreatment device to monitor the operation of the exhaust aftertreatment device.
- the loading of a particulate filter such as a diesel particulate filter
- the coupled electromagnetic waves of the loading state of a catalyst such as an SCR catalyst
- the waveguide is coupled to that end region of the coupling element which is located in or above the opening.
- the waveguide is coupled to the free end of the coupling element arranged in or above the opening, whereby the effective length of the coupling element, which is measured from the coupling point between waveguide and coupling element and the attachment point of the coupling element on the exhaust pipe, are set to an optimum value can.
- the waveguide is a coaxial conductor, which has an inner conductor, which is coupled to the coupling element, and an outer conductor which coaxially surrounds the inner conductor, which is coupled to the shielding housing.
- a hole is formed in the shielding, in which the outer conductor is at least partially inserted ⁇ and where the outer conductor is coupled to the shield case ⁇ , for example by welding, soldering, caulking or screwing.
- the inner conductor extends into the interior of the shield and there is ge ⁇ coupled with the coupling element, for example by welding or soldering.
- the opening is one substantially
- the coupling element is formed integrally with the exhaust pipe substantially. More precisely, the introduction of the U-shaped opening into the exhaust pipe leaves a web-shaped region of the exhaust pipe, which constitutes the coupling element.
- a substantially rectangular opening may be provided, wherein a rod-shaped coupling element is fastened to the exhaust pipe in such a way that the rod-shaped coupling element extends into or over the opening and thus results in a U-shaped opening viewed in plan view.
- the rod-shaped coupling element is a separate element attached to the exhaust gas line and / or the shielding housing.
- the rod- ⁇ -shaped coupling member is fixed to an outer or inner wall of the Ab ⁇ gas line and / or of the shield case in the region of the opening such that it extends at least partially across the opening, and preferably a portion of the rod-shaped coupling elements above or below the opening is arranged.
- the rod-shaped coupling element is attached to a peripheral wall of the opening and extends substantially at least partially into the opening.
- the rod-shaped coupling element can be integrally formed with the waveguide.
- an effective length of the coupling ⁇ elements which, measured between a coupling point at which the waveguide is coupled to the coupling element, and a fastening point at which the coupling element is attached to the exhaust pipe, approximately one quarter of a relevant wavelength corresponds.
- the coupling element is rod-shaped and extends substantially parallel to the longitudinal axis or extends with respect to the longitudinal axis substantially in the circumferential direction.
- Such a protective element may, for example, be a protective film formed of mica, which at least partially prevents the exhaust gas from flowing into and polluting the interior of the shielding housing.
- the shielding housing is formed with respect to the longitudinal axis as radially outwardly extending formation or bulge of the substantially cylindrical exhaust pipe and thus embodied integrally with the exhaust pipe.
- the opening is defined by the fact that this is determined by the transition region between the originally cylindrical exhaust pipe and the molding.
- the electromagnetic waves coupled into the exhaust conduit preferably have frequencies ranging from about 0.3 GHz to about 500 GHz. 0
- the shielding housing and / or the coupling element integrally with the exhaust pipe by means of suitable initial and forming processes.
- the coupling of the electromagnetic waves can be done inductively, capacitively or by a combination thereof.
- the decoupling of the electromagnetic waves can be done inductively, capacitively or by means of combinations thereof.
- All relevant for an effective coupling of electromagnetic waves into the exhaust pipe or exhaust aftertreatment device components of the exhaust pipe assembly according to the invention are preferably formed from materials that have a high conductivity, for example, a conductivity greater than 50,000 S / m.
- the waveguide may be at least partially integrally formed with the shielding and / or the coupling element.
- a coupling unit be ⁇ standing from the shield, the coupling element and the Wel ⁇ lenleiter, can be provided as a preassembled unit which is adapted to retrofit an existing exhaust pipe with such a coupling unit.
- an exchange of z. B. defective coupling unit possible.
- Each of the coupling structures described herein may be arbitrarily connected to other, e.g. B. also known, coupling structures are combined on an exhaust gas line. In this case, the orientations of the respective coupling structures can be adjusted as desired, so that the reflection and / or transmission behavior can be determined.
- the coupling element is coupled via a ⁇ be undesirables impedance to the exhaust line and / or the shield or connected.
- Fig. 1 is a perspective view of an inventive
- FIG. 2 shows an enlarged view of the exhaust pipe arrangement of FIG. 1, FIG.
- Fig. 3 is a sectional view through the exhaust gas guide of
- Fig. 2 shows
- Fig. 4 shows an enlarged view of an exemplary From ⁇ gas conduit means
- Fig. 6 shows a perspective view of a further exemplary game at ⁇ exhaust circuit
- 7 shows a section through the exhaust pipe arrangement of
- Fig. 6 shows
- FIG. 8 shows a perspective view of a further exemplary exhaust pipe arrangement
- Fig. 9 shows a sectional view through the exhaust gas conduit arrangement of Fig. 8, and Fig. 10 shows a further exhaust conduit arrangement according to the invention.
- Fig. 1 shows an exhaust pipe assembly 100 of the invention, by the exhaust gas of an internal combustion engine (not Darge ⁇ asserted) substantially along the longitudinal axis 101 in the direction of arrow 10 can flow.
- Exhaust conduit assembly 100 includes an exhaust conduit 110 that is substantially tubular and cylindrical.
- the exhaust pipe 110 preferably has a circular cross-section and is formed by a jacket wall .
- an exhaust aftertreatment ⁇ device 120 is arranged, which is designed to at least partially post-treat the exhaust gas flowing through the exhaust pipe 110.
- the exhaust aftertreatment device 120 is indicated in FIG. 1 by the dashed circular lines.
- the exhaust aftertreatment system 120 is, for example, a catalyst device, such as an SCR catalytic converter, or a filter device, such as a diesel particulate filter.
- FIG. 1 shows that an opening 130 is provided in the tubular exhaust pipe 110. More specifically, the opening 130 is arranged substantially radially to the longitudinal axis and in the jacket wall of the exhaust pipe 110.
- a shielding housing 140 and a waveguide 150 are not shown in FIG. 1, which are shown in more detail in FIGS. 2 and 3, however.
- the opening 130 shown in FIG. 1 is substantially U-shaped and extends substantially with respect to the longitudinal axis 101 in the axial direction.
- the opening 130 is introduced ⁇ example by punching or embossing in the jacket wall of the exhaust pipe 110.
- the substantially U-shaped opening 130 may extend along the circumferential direction about the longitudinal axis 101.
- a coupling element 112 (see FIGS. 2 and 3) may extend in the axial direction or in the circumferential direction with respect to the longitudinal axis 101. The arrangement of the U-shaped opening 130 and the coupling element 112 will be explained in more detail with reference to FIGS. 2 and 3.
- FIG. 2 shows a detailed view of the exhaust pipe 110 in the region of the opening 130.
- FIG. 2 shows that the exhaust pipe arrangement 100 furthermore has a shielding housing 140, which is attached to the exhaust pipe 110 from the outside in such a way that it forms the opening 130 essentially completely surrounds.
- the shielding housing 140 is, for example, a substantially cuboidal housing with an open side, wherein the open side is arranged in the direction of the exhaust pipe 110.
- Shielding housing 140 is rigidly attached to the exhaust pipe 110, for example, by welding, soldering or other types of fastening.
- welding soldering
- the shielding housing 140 may be provided by forming in the cylindrical exhaust pipe 110 a formation or bulge which extends substantially radially outwards relative to the longitudinal axis 101.
- the shield case 140 is integrally formed with the exhaust passage 110.
- FIG. 2 further shows that the exhaust-gas line arrangement 100 has a waveguide 150, which in the embodiment shown in FIGS. 2 and 3 is in the form of a coaxial conductor.
- the waveguide 150 may be formed as a shielded two-wire line, microstrip line, stripline or coplanar line, for example.
- the waveguide 150 embodied as a coaxial conductor consequently has an inner conductor 152 and an outer conductor 154 surrounding the inner conductor 152.
- the inner conductor 152 and the outer conductor 154 are arranged coaxially with one another and designed to couple electromagnetic waves into the shielding housing 140 in such a way that the electromagnetic waves coupled therein can be propagated through the opening 130 into the exhaust pipe 110 and thus into the exhaust aftertreatment device 120 ,
- the Abgas Gustavs- arrangement 100 has a coupling element 112 which is formed in the off ⁇ design of Fig. 1 integral with the exhaust pipe 110.
- the coupling element 112 may be one, separate, prior ⁇ preferably rod-shaped member that is so attached to the Ab ⁇ gas line 110 that it is in or on Opening 130 extends.
- a free end of the rod-shaped coupling element 112 is located in or above the opening 130.
- the opening 130 can be provided with a rectangular cross section, wherein a separate, rod-shaped coupling element 112 is attached to an outer wall of the opening 130 such that it is As shown in Fig.
- the separate rod-shaped coupling element 112 may be mounted near the opening 130 of rectangular cross-section on an outside or inside of the shell wall of the exhaust pipe 110 so as to extend substantially across the opening 130, as shown in FIG and consequently the opening 130 can appear in plan view as a U-shaped opening.
- FIG. 3 shows a sectional view through the shielding housing 140 and the waveguide 150 along a plane in which the longitudinal axis 101 of the exhaust conduit 110 extends. From Fig. 3 shows that the inner conductor 152 of the waveguide 150 is coupled to the coupling element 112. As shown in FIGS. 2 and 3, the coupling element 112 is at least partially bent radially outward at its free distal end with respect to the longitudinal axis 101. The radially outwardly extending end of the coupling element 112 with respect to the longitudinal axis is coupled to the inner conductor 152, for example by means of welding or soldering. Al ⁇ ternatively, the coupling element 112 is not bent radially outward.
- the outer conductor 154 of the waveguide 150 is connected to the shield case 140.
- a hole 142 in the shielding housing 140 the diameter of which corresponds essentially to the outer diameter of the outer conductor 154, is formed for this purpose.
- this Hole 142 may then at least partially inserted the outer conductor 154 and be connected to the shielding 154, for example by means of welding, soldering, caulking or screwing. Consequently, also the inner conductor 152 of the waveguide 150 extends through the hole 142 into the interior of the ex ⁇ screen housing 140 in and there is, as already described, connected to the free distal end of the coupling element 112th
- the connecting area between the inner conductor 152 and the coupling member 112 may define a coupling-in 114, 150, electromagnetic waves can be coupled via the inside of the shield case 114 by means of the Wel ⁇ lenleiters. Furthermore, these waves may then couple into the exhaust aftertreatment device 120.
- the coupling element 112 preferably has an effective length L, which measures substantially between the coupling point 114 and an end wall of the shielding housing 140, which is viewed from the coupling point 114 in the direction of the coupling element 112.
- the effective length L of the coupling element 112 corresponds to approximately one quarter of the relevant wavelength of the coupled electromagnetic waves, it being preferred if the effective length L of the coupling element 112 is slightly smaller than a quarter of the relevant wavelength of the coupled electromagnetic waves.
- the effective length L is in a range between about 5 cm and about 8 cm.
- the shielding housing 140 further has a height H, which extends in the radial direction with respect to the longitudinal axis 101.
- the height H is in a range between about 5 mm and about 20 mm.
- the aperture 130 may be at least partially covered by a protective member (not shown) adapted to be transmissive to electromagnetic waves and impermeable to exhaust particulate.
- the protective element comprises a protective film formed of mica, which is attached to the exhaust pipe 110 and / or the coupling element 112 and covers the opening 130 at least partially.
- the exhaust pipe arrangement 100 of FIGS. 1 to 3 further has a dielectric sealing element 160, which is designed to shield the area between the inner conductor 152 and outer conductor 154 thermally with respect to the interior of the shielding housing 140.
- the sealing member 160 may be configured to at least partially stabilize the entire structure and at least partially prevent ingress of dirt particles into the waveguide.
- the completely arranged around the opening 130 shielding 140 ensures a tightness against the high-frequency electromagnetic waves and serves that the electromagnetic waves ⁇ , which are introduced by means of the coaxial conductor 150 in the shield, substantially completely in the exhaust pipe 110 and the exhaust aftertreatment device 120th be propagated and not radiate radially outward.
- a loading of the exhaust gas aftertreatment device 120 can be concluded.
- the evaluation takes place, for example, in the case of an SCR catalytic converter in that the electrical dielectricity number of the SCR catalytic converter changes depending on the load state and thus also the resonance behavior of the arrangement.
- the average resonance behavior can be, for example be evaluated to determine the loading of the SCR catalyst.
- the amplitudes and / or the quality factor can be examined.
- mathematical and / or statistical methods are applicable to the signals, such as averaging, centroid, interpolation, fit functions, and the like. 4 and 5 show further embodiments of exhaust pipe assemblies 100th
- FIG. 4 shows that the coupling element 112 may be formed integrally with the inner conductor 152 of the waveguide 150 designed as a coaxial conductor.
- the inner conductor 152 is provided such that it is extending into the interior of the screen housing from ⁇ 140 and deflected in the region of the opening 130 such that this extends at least partially in and / or over the opening 130th
- the inner conductor 152 may then be attached to the exhaust conduit 110 at one end of the opening 130, e.g. B. at the front end of the exhaust pipe 110, where the opening 130 begins, ie, below a side wall 144 of the screen housing ⁇ be secured, for example by means
- FIG. 5 shows an embodiment according to the invention, in which the outer conductor 154 of the waveguide 150 is at least partially integrally formed with the shielding housing 140.
- a further waveguide 150 designed as a coaxial cable can be connected to the radially outer one End of the shield housing 140 are coupled, wherein the coupling element 112, which additionally acts in sections as inner ⁇ conductor, is connected to the inner conductor of the further waveguide.
- the inner conductor 152 may again with respect to the longitudinal axis 101 radially externally curved coupling element 112 or, as shown in FIG. 4, extend holistically to the sides 144 of the shielding housing 140.
- FIGS. 1 to 5 are combined with one another as desired.
- the waveguide 150 and the shield ⁇ housing 140 may be formed as a combination of the embodiments shown in FIGS. 4 and 5.
- FIG. 6 to 9 show exemplary embodiments of an exhaust pipe assembly 100, which are not according to the invention.
- FIG. 6 shows a perspective view of an exemplary exhaust pipe arrangement 100 in which a slot-shaped opening 130 is provided.
- the shield case 140 in Figs. 6 and 7 shown embodiment, the opening 130 is substantially in turn completely surrounds and extends ⁇ be consulted the longitudinal axis 101 of the shell wall of the exhaust pipe 110 radially outwardly.
- the waveguide 150 which is again exemplified as a coaxial conductor in the embodiments shown in FIGS. 6 to 9, again extends from the outside into the shielding housing 140.
- the inner conductor 152 is coupled to a side wall of the housing 140, for example by welding, Soldering, caulking or screwing, and the Outer conductor 154 is in turn at least partially inserted into a hole 142 (see FIG. 7) in the shielding housing 140 and coupled thereto, for example by means of welding, soldering, caulking or screwing.
- the inner conductor 152 is preferably, but not necessarily, coupled in the immediate vicinity of the slot-shaped opening 130 on a side wall of the shielding housing 140 and may define the coupling point 114 at this location. It is preferred if the coupling-in point 114 is arranged in a central region of the slot-shaped opening 130 such that a distance D of Einkoppelticians 114 to a side wall of the ex ⁇ screen housing 140 in a first direction along the slit-shaped opening 130 equal to a distance D to a opposite side wall of the shield case 140 in a second direction opposite to the first direction along the slit-shaped opening 130 is the same. Preferably, the distance D is approximately half the length of the slot-shaped opening 130.
- the distance D is approximately one quarter of the relevant wavelength. Accordingly, the axial extent of the slot-shaped opening 130 (or the length of the slot-shaped opening 130) is substantially designed such that it corresponds to approximately half of the relevant wavelength. It can thereby be accomplished that the electromagnetic waves coupled into the shielding housing 140 have sufficient space available and consequently can be propagated through the slot-shaped opening 130 into the exhaust line 110 and thus into the exhaust aftertreatment device 120.
- FIG. 7 shows a section of a sectional view through a plane passing through the shielding housing 140 and the waveguide 150 and perpendicular to the longitudinal axis 101.
- FIG. 7 shows that the inner conductor 152 is located on the inside of a side wall of the housing.
- screen housing 140 is fixed and the outer conductor 154 is attached to one of these side wall opposite side wall of the shield 140.
- the junction between the inner conductor 152 and the shield 140 can be used as coupling-114 ⁇ be distinguished in turn, is adapted to couple the guided from the waveguide 150 electromagnetic waves in the shield case 140th
- the coupling-in point 112 is spaced from the radially outer end of the shielding housing 140 with respect to the longitudinal axis by the effective distance L, which preferably corresponds to approximately one quarter of the relevant wavelength of the coupled-in electromagnetic waves.
- the effective distance L is comparable to the effective length L of the coupling element 112 of FIGS. 1 to 3 and corresponds approximately to a quarter of the relevant wavelength of the coupled electromagnetic waves.
- the effective distance L is in a range between about 2 cm and about 8 cm.
- the height H of the shielding housing 140 is again preferably as small as possible and ranges between about 5 mm and about 20 mm.
- the dimension of the shielding housing 140 in the radial direction may be significantly greater in other embodiments than a quarter of the relevant wavelength. Thereby, an effective heat isolation from the exhaust pipe 110 can be achieved.
- FIGS. 8 and 9 show a further development of the exemplary exhaust circuit 100 shown in Figs. 6 and 7, wherein the shield extends in the circumferential direction with respect to the longitudinal axis 101 at least in part ⁇ , 140.
- Fig. 8 shows a perspective view of another exemplary exhaust ⁇ conduit assembly 100, a slit-shaped opening 130 is provided in which also in turn, entirely by the Shielding housing 140, which is attached to the exhaust pipe 110 from the outside, surrounded.
- the shielding housing 140 has a curved shape which substantially corresponds to the curvature of the exhaust pipe.
- the coupling-in point 114 that is to say the connection point between the inner conductor 152 of the waveguide 150 and the exhaust line 110, is again preferably arranged directly in the immediate vicinity of the slot-like opening 130 and has a distance L from one of the slot-shaped opening 140 in the circumferential direction of the side wall of the shielding housing 140 that corresponds advantageously approximately a quarter of the relevant Wel ⁇ lenide.
- the outer conductor 154 is in turn coupled to the shielding housing 140, for example by means of welding, soldering, Calking or bolting, however, the inner conductor 152 is coupled to the exhaust pipe 110 for forming the Einkoppelticians 114, for example by means of welding, soldering, caulking or screwing.
- the height H of the shielding housing 140 is again preferably as small as possible and ranges between about 5 mm and about 20 mm.
- FIG. 10 shows a further exhaust pipe 100 according to the invention, which essentially corresponds to the embodiment of FIGS. 1 to 3.
- the exhaust pipe arrangement 100 of FIG. 10 differs from the exhaust pipe arrangement of FIGS.
- At least one further Einkoppelvor ⁇ direction which has an opening 230 in the exhaust pipe 110, a shield 240 and a waveguide 250, can be provided on the exhaust pipe 110.
- the configurations of the opening 130, 230, of the shielding housing 140, 240 and the waveguides 150, 250 may each be at least similar.
- these elements are each identical, the two being spaced apart from each other with respect to the longitudinal axis 101 in the circumferential direction at a distance A.
- these can also be designed in distance and orientation so that a desired transmission or reflection behavior is set.
- the two coupling devices may be for example adapted to a redundant monitoring of the exhaust gas aftertreatment system 120 be ⁇ riding observed.
- one of the two coupling devices serving as a transmitter and the other coupling device serving as a receiver to monitor the exhaust gas aftertreatment system by means of transmission of a ⁇ coupled electromagnetic waves through the advantages.
- the coupled by the transmitter into the exhaust pipe 110 electromagnetic waves propagate in the interior thereof and are attenuated in the case of a diesel particulate filter on its way to the other coupling device in amplitude.
- This damping can be For example, be used as a measure of the loading condition of the diesel particulate ⁇ filters.
- FIGS. 6 to 9 according to FIG. 10 can also be designed with two or more coupling devices.
- each of the coupling structures described herein may be arbitrarily connected to other, e.g. B. also known, coupling structures are combined. In this case, the orientations of the respective coupling structures can be adjusted as desired, so that the reflection and / or transmission behavior can be determined.
- the shield case 140 may be spaced from the exhaust passage 110 and may have a closed structure in which an opening 130 is similar to the opening.
- a further waveguide can be arranged between the opening in the shielding housing 140, which is spaced apart from the exhaust pipe, and the opening 130 in the exhaust pipe 100, which waveguide is designed to transmit the electromagnetic signals coupled into the shielding housing 140
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017209047.2A DE102017209047B4 (de) | 2017-05-30 | 2017-05-30 | Abgasleitungsanordnung für eine Brennkraftmaschine |
| PCT/EP2018/063505 WO2018219736A1 (de) | 2017-05-30 | 2018-05-23 | Abgasleitungsanordnung für eine brennkraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3631181A1 true EP3631181A1 (de) | 2020-04-08 |
Family
ID=62244490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18726982.4A Withdrawn EP3631181A1 (de) | 2017-05-30 | 2018-05-23 | Abgasleitungsanordnung für eine brennkraftmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3631181A1 (de) |
| DE (1) | DE102017209047B4 (de) |
| WO (1) | WO2018219736A1 (de) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD16878U (de) | ||||
| DE1114866B (de) | 1961-01-14 | 1961-10-12 | Telefunken Patent | Anordnung zum Ankoppeln einer koaxialen Leitung an einen Rechteckhohlleiter |
| FR2432775A1 (fr) | 1978-08-03 | 1980-02-29 | Trt Telecom Radio Electr | Dispositif de transition entre un cable coaxial et un guide d'ondes a section rectangulaire avec acces par le petit cote du guide et circuits hyperfrequence comportant un tel dispositif |
| US4580441A (en) * | 1983-05-10 | 1986-04-08 | Nippondenso Co., Ltd. | Diesel smoke meter |
| JP2738251B2 (ja) | 1993-01-20 | 1998-04-08 | 松下電器産業株式会社 | 内燃機関用フィルタ再生装置 |
| JP5311105B2 (ja) | 2007-07-12 | 2013-10-09 | イマジニアリング株式会社 | 排ガスの物質浄化装置 |
| DE102008012050A1 (de) | 2008-02-29 | 2009-09-03 | Fischerauer, Gerhard, Prof. Dr.-Ing. | Vorrichtung und Verfahren zur Steuerung eines Abgasnachbehandlungssystems, das einen Abgaskatalysator beinhaltet |
| JP2010223169A (ja) * | 2009-03-25 | 2010-10-07 | Ngk Insulators Ltd | 粒子状物質の堆積量検出装置 |
| DE102010019309B4 (de) | 2010-05-03 | 2022-05-19 | Gerhard Fischerauer | Verfahren zur Erkennung des Zustands eines kombinierten Abgasnachbehandlungssystems mit mehreren Komponenten |
| DE102010034983A1 (de) | 2010-08-20 | 2012-02-23 | Gerhard Fischerauer | Verfahren zur Erkennung des Ammoniakspeicherzustands eines SCR-Katalysators |
| DE102015001229A1 (de) * | 2015-02-03 | 2016-08-04 | Markus Dietrich | Vorrichtung zur Einkopplung und/oder Auskopplung von Mikrowellen in den Abgasstrang eines Verbrennungsmotors |
| DE102015001228A1 (de) * | 2015-02-03 | 2016-08-04 | Markus Dietrich | Antennenmodul mit zwei kombinierten Antennen für ein Verfahren zur Zustandserkennung von Abgasnachbehandlungs-Komponenten mit Hilfe von Mikrowellen |
| JP6597190B2 (ja) | 2015-10-30 | 2019-10-30 | 富士通株式会社 | マイクロ波照射装置及び排気浄化装置 |
-
2017
- 2017-05-30 DE DE102017209047.2A patent/DE102017209047B4/de not_active Expired - Fee Related
-
2018
- 2018-05-23 WO PCT/EP2018/063505 patent/WO2018219736A1/de not_active Ceased
- 2018-05-23 EP EP18726982.4A patent/EP3631181A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017209047A1 (de) | 2018-12-06 |
| WO2018219736A1 (de) | 2018-12-06 |
| DE102017209047B4 (de) | 2019-05-02 |
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