EP4141224A1 - Connection unit - Google Patents
Connection unit Download PDFInfo
- Publication number
- EP4141224A1 EP4141224A1 EP22186598.3A EP22186598A EP4141224A1 EP 4141224 A1 EP4141224 A1 EP 4141224A1 EP 22186598 A EP22186598 A EP 22186598A EP 4141224 A1 EP4141224 A1 EP 4141224A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connection
- insulating
- connection unit
- connecting element
- insulating element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000010292 electrical insulation Methods 0.000 description 8
- 230000004323 axial length Effects 0.000 description 4
- 239000012777 electrically insulating material Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Images
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
- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—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 using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
-
- 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
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
- F01N13/1827—Sealings specially adapted for exhaust systems
-
- 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
- F01N2240/16—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 an electric heater, i.e. a resistance heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/20—Exhaust treating devices having provisions not otherwise provided for for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/16—Methods or apparatus for fitting, inserting or repairing different elements by using threaded joints
Definitions
- the present invention relates to a connection unit which can be used to electrically conductively connect an exhaust gas heater provided in an exhaust system of an internal combustion engine to an electrical supply line leading to a voltage source.
- connection unit is from U.S. 10,941,688 B2 known.
- An electrically conductive connection element of this known connection unit which is elongated in the direction of a longitudinal axis, is surrounded by a sleeve-like carrier made of metal material.
- a sleeve-like insulating element is arranged between the sleeve-like carrier and the connecting element, the axial extent of which is greater than the axial extent of the sleeve-like carrier, so that the insulating element, surrounding the connecting element over the entire axial length of the insulating element, axially over the sleeve-like carrier protrudes.
- This axially uninterrupted covering of the connecting element beyond the axial extent of the sleeve-like carrier is intended to prevent the occurrence of leakage currents, while at the same time a stable connection between the connecting element and the sleeve-like carrier suitable for absorbing torque is realized.
- connection unit for connecting an electrical supply line to an exhaust gas heater of an exhaust system of an internal combustion engine, with which an electrically insulated bushing resistant to the thermal stress occurring in an exhaust system on the various components of the exhaust system can be provided with a simple structural design .
- connection unit constructed according to the invention, a multi-piece or sandwich-like construction of the electrical insulation between the connection element and the connection element carrier is provided, in which the firm bond between the connection element and the connection element carrier is essentially achieved by axial bracing between the two insulating elements supported with respect to the end faces of the connection element carrier .
- the first insulating element, the second insulating element and the third insulating element are designed as separate components.
- the first insulating element can be designed as an insulating sleeve and/or the second insulating element can be designed as an insulating disk and/or the third insulating element can be designed as an insulating disk.
- a sleeve-like structure can be assumed if a radial wall thickness of the component under consideration is smaller than the axial length of this component, while a disk-like structure can be assumed if the radial wall thickness of the component under consideration is in the range of the radial wall thickness or smaller than this.
- an axial extension length of the first insulating element be smaller than an axial distance between the second insulating element and the third insulating element, and/or that between the first insulating element and at least one insulating element of the second insulating element and the third An axial gap is formed in the insulating element, and/or that an axial length of extension of the first insulating element is smaller than an axial length of extension of the connecting element receiving opening.
- connection element For axial support of the connection element with respect to the connection element carrier on its axial end faces, the connection element can be supported axially on the second insulating element via a first abutment arrangement and on the third insulating element via a second abutment arrangement.
- an abutment arrangement of the first abutment arrangement and second abutment arrangement comprises an abutment projection that is provided fixed on the connection element and protrudes radially outwards, and/or that a
- the abutment arrangement of the first abutment arrangement and the second abutment arrangement preferably the second abutment arrangement, comprises an abutment element coupled to the connecting element such that it can be displaced axially.
- the abutment element can be coupled to the connection element by threaded engagement.
- At least one abutment arrangement of the first abutment arrangement and second abutment arrangement can comprise at least one axially elastic support element in the support path between the connection element and the connection element carrier.
- the at least one axially elastic support element can be designed, for example, as a cup spring or corrugated spring.
- connection unit In order to ensure a defined positioning of the connection unit on an outer wall of an exhaust gas routing component to be connected thereto, it is proposed that a centering projection surrounding the connection element receiving opening be provided on the first axial end face of the connection element carrier. Such a centering projection can engage in an opening in such a wall, through which the connection unit passes, and thereby center the connection unit.
- the second insulating element can be supported axially on the centering projection, since this forms the axially most protruding area of the connection element carrier.
- connection unit can comprise a supply line connection element which is or can be coupled to the connection element in its supply line connection area.
- the supply line connection element can be held in a predetermined position about the longitudinal axis with respect to the supply line connection area by means of a form-fit positioning formation.
- connection element be held in a rotationally fixed manner with respect to the connection element carrier by means of frictional engagement and/or positive engagement. It is particularly advantageous if such a frictional connection and/or positive connection is provided only or essentially only in the area of the second and third insulating elements, which are designed like disks, for example, while the first insulating element essentially serves to center the connecting element in the connecting element receiving opening and to keep electrically isolated, but without significant forces, especially forces acting in the circumferential direction, to transfer between the connection element and the connection element carrier.
- the invention also relates to an exhaust system for an internal combustion engine, comprising an exhaust gas routing element with an outer wall and an exhaust gas flow space surrounded by the outer wall, an exhaust gas heater arranged in the exhaust gas flow space and at least one connection unit fixed to the outer wall and having a structure according to the invention, the exhaust gas heater connection area of the at least one Connection unit is electrically connected to the exhaust gas heater.
- a section of an exhaust system for an internal combustion engine of a vehicle, shown in principle, is denoted by 10 .
- An outer wall 12 of a generally designated 14, for example tubular exhaust gas guiding element defines an exhaust gas flow space 16, in which the exhaust gas emitted by an internal combustion engine, for example in the direction of an exhaust gas treatment unit, such as. B. catalyst assembly or the like flows.
- An exhaust gas heater 18 is arranged in the exhaust gas flow space 16 . This can include one or more heating conductors that can be heated by electrical excitation in order to transfer heat to the exhaust gas flowing around it, which heat can be absorbed in an exhaust gas treatment unit that follows downstream and can thus ensure accelerated heating of the same.
- connection unit 22 In the area of an opening 20 provided in the outer wall 12, a connection unit, generally designated 22, is provided and fixed to the outer wall 12, for example by welding, to seal the exhaust gas flow space 16 in a gas-tight manner.
- the connection unit 22 provides an electrical feedthrough through the outer wall 12 via which a voltage source provided in a vehicle can be electrically conductively connected to the exhaust gas heater 18 .
- a voltage source provided in a vehicle can be electrically conductively connected to the exhaust gas heater 18 .
- two such connection units 22 can be provided, for example. If several exhaust gas heaters 18 are provided in the exhaust system 10, for example at different axial positions, two such connection units 22, for example, can be provided in association with each exhaust gas heater 18.
- connection unit 22 shown in more detail comprises a connection element carrier 24 which is designed in the manner of a sleeve or socket and is made of metal material.
- the connection element carrier 24 has a connection element receiving opening 26 which extends between a first axial end face 28 and a second axial end face 30 of the connection element carrier 24.
- connection element receiving opening 26 which extends between a first axial end face 28 and a second axial end face 30 of the connection element carrier 24.
- a centering projection 32 can be formed on the first end face 28, which can be dimensioned radially in such a way that it can move with little radial play, radially with respect to a longitudinal axis L of an electrically conductive connection element 34 or the entire connection unit 22, can be positioned in the opening 20 engaging.
- the connecting element carrier 24 bears against the outside of the outer wall 12 with a flange-like edge region 36 protruding radially outwards over the centering projection 32 and can be firmly and gas-tightly connected thereto, for example, by a circumferential weld seam on the outside.
- connection element 34 penetrating the connection element receiving opening 26 in the connection element carrier 24 has an exhaust gas heater connection area 40 in a first axial end area 38 to be positioned such that it engages in the exhaust gas flow chamber 16, in which an in 1 shown in principle and an electrical connection to the exhaust gas heater 18 producing connection line 42, for example by material connection, such. B. soldering or welding, with the connection element 34 can be electrically conductively connected.
- the exhaust gas heater connection area 40 can also be positioned such that it engages in the exhaust gas flow chamber 16 such that it rests under prestress on a contact area of the exhaust gas heater 18 and thus implements the electrical contact.
- a supply line connection area 46 is formed on a second axial end area 44 of the connection element 34 .
- This has, for example, a conically tapering contact area 48 in the direction away from the first end area 38 and an externally threaded area 50 axially adjoining it.
- a supply line connection element 52 with a sleeve-like mating contact area 54 is pushed onto the contact area 48 . If this is achieved a nut element (not shown) is screwed onto the externally threaded area 50 in order to pretension the supply line connection element 52 against the contact area 48 and to hold it firmly on the connection element 34 .
- a positive-locking positioning formation 56 is provided, which is positioned one radially on the connection element 34, in particular the contact region 48 thereof, at a circumferential position externally projecting form-fitting projection 58 and on the sleeve-like mating contact area 54 of the supply line connection element 52 includes an axially open form-fitting recess 60 .
- the form-fitting recess 60 and the form-fitting projection 58 are positioned aligned with one another in the circumferential direction, so that the form-fitting projection 58 can enter the form-fitting recess 60 when the supply line connecting element 52 is axial is pushed onto the contact area 48 .
- a defined circumferential positioning for the supply line connection element 52 with respect to the connection element 34 around its longitudinal axis L is specified.
- a carrying region 62 of the connecting element 34 which is positioned between the two axial end regions 38, 44 of the connecting element 34 and passes through the connecting element receiving opening 26, is surrounded by a sleeve-like first insulating element 64 .
- the first insulating element 64 constructed with electrically insulating material, for example sintered ceramic material or the like, surrounds the carrying area 62 essentially without play, but also without significant frictional interaction.
- the first insulating element 64 is positioned in the connecting element receiving opening 26 and rests against an inner peripheral surface of the connecting element carrier 24 surrounding the connecting element receiving opening 26 without generating significant frictional forces.
- first insulating element 64 is thus the connecting element 34 electrically insulated in the region of its carrying region 62, which extends through the connecting element receiving opening 26, and is carried centered in the connecting element receiving opening 26, without significant torques being able to be transmitted between the connecting element 34 and the connecting element carrier 24.
- the second insulating element 66 is supported axially on the connecting element carrier 24 in the area of the centering projection 32 .
- a first abutment arrangement In association with the second insulating element 66 , a first abutment arrangement, generally designated 68 , is provided for axially supporting the connection element 34 .
- a third insulating element 72 made of electrically insulating material, for example sintered ceramic material or the like, is provided in the form of a disk or annular disk.
- a second abutment arrangement is provided for the axial support of the connecting element 34 in a second axial direction opposite the first axial direction in the direction of the exhaust gas flow chamber 16.
- the second abutment arrangement 73 comprises a nut element made of metal material, for example, which acts as an abutment element 74 and has an internal thread, which is screwed onto an external thread 76 provided in the region of the carrying area 62 of the connection element 34, see above that by rotating the nut element with respect to the connection element 34, the nut element is displaced axially with respect to the connection element 34.
- an axially elastic support element 78 embodied, for example, as a disk spring or corrugated spring
- an intermediate disk 80 made, for example, of metal material.
- the intermediate disk 80 ensures that the second insulating element 72 is evenly loaded with the axial load generated or transmitted by the axially elastic support element 78, even if the axially elastic support element is supported on the intermediate disk 80 only in limited radial areas or peripheral areas when configured as a plate spring or corrugated spring .
- connection element 34 The interaction of the two abutment arrangements 68, 73 ensures a defined axial clamping of the connection element 34 with the interposition of the sandwich-like insulation formed by the three insulating elements 64, 66 and 72.
- axially elastic support element 78 By providing the axially elastic support element 78 in the axial support path or force transmission path between the connection element 34 and the connection element carrier 24, different thermal expansions of the components of the connection unit 22, which are also thermally stressed to different extents and possibly made of different materials, are permitted without local tensions or overloads being generated become.
- the axial clamping force can be adjusted by screwing the abutment element 74 onto the external thread 76 in a defined manner.
- a defined rotary positioning of the connecting element 34 with respect to the connecting element carrier 36 is achieved by the components that follow one another axially and are in frictional contact with one another.
- a form-fitting positioning formation that interacts with the second insulating element 66 could be provided on the first end face 28 of the connection element carrier 24, for example, which defines the rotational position of the second insulating element 66 with respect to the connection element carrier 24 pretends, for example by one or more form-fitting projections engaging axially in associated form-fitting recesses.
- a form-fit positioning formation could act between the second insulating element 66 and the abutment jump 70 of the connecting element 34 in order to specify the rotational positioning of the connecting element 34 with respect to the second insulating element 66 and, via this, with respect to the connecting element carrier 24 .
- the first insulating element 64 which is designed like a sleeve, is dimensioned in such a way that its axial extent is no greater, preferably smaller, than the axial extent of the connection element receiving opening 26 receiving it or the axial distance between the two end faces 28, 30 of the receiving element carrier 24, in particular in those areas in which the disk-like sealing elements 66, 72 are supported on them, or as the axial distance between the two disk-like sealing elements 66, 72.
- the first insulating element 64 can be dimensioned in this way and in the connecting element receiving opening 26 be positioned so that between this and each of the two disk-like sealing elements 66, 72 a gap-like axial gap 82, 84 is formed with an axial extent in the range of one or a few tenths of a millimeter to one or more millimeters.
- axial forces can be exerted on the end faces 28, 30 of the connection element carrier 24 by the two abutment arrangements 68, 73 via the disk-like insulating elements 66, 72 without loading the sleeve-like first insulating element 64.
- this can therefore essentially fulfill its functions of providing radial centering and electrical insulation of the connection element 34 with respect to the connection element carrier 24 without transmitting significant forces, in particular significant forces acting in the circumferential direction and in the radial direction, between them.
- the first insulating element 64 could also be positioned in the connection element-receiving opening 26, for example, in such a way that it is in contact with the radial inner region of one of the two disk-like insulating elements 66, 72, but has the axial clearance or a larger axial clearance than in the other of the two disk-like insulating elements 66, 72 10 shown.
- the connecting element 34 is not covered by the latter over the entire axial extent of the electrical insulation comprising the three insulating elements 64, 66, 72, this is nonetheless efficient electrical insulation between the connection element 34 and the connection element carrier 24 is ensured.
- connection unit 22 is in the Figures 6 to 9 shown.
- the structure of the connection unit 22 corresponds to that above, in particular with regard to the configuration of the connection element carrier 24 and the support or electrical insulation of the connection element 34 with respect to this via the electrical insulation comprising the three insulating elements 64, 66 and 72 and the abutment arrangements 68, 73 relation to the Figures 1 to 5 described structure, so that reference can be made to the relevant embodiment.
- the form-fitting interaction between the two form-fitting recesses 60, 86 is produced by a form-fitting element 88 designed, for example, in the manner of a pin or ball, which is inserted into the form-fitting recess 86 before the supply line connecting element 52 is pushed axially onto the supply line connecting region 46 of the connecting element 34, and protrudes radially outward beyond this.
- the supply line connection element 52 is then pushed onto the second axial end region 44 or the supply line connection region 46 in such a way that the form-fitting element 88 protruding radially outward beyond the contact region 48 enters the form-fitting recess 60 and thus a defined positioning of the supply line connection element 52 with respect to the connection element 34 in Circumferential direction about the longitudinal axis L specifies.
- connection unit In the construction of a connection unit according to the invention, a structurally simple, easy-to-manufacture and mechanically stable design is provided, which avoids the existence of local overload areas due to various thermal expansions even under high thermal stress. Due to the possibility of being able to specify defined rotational positions between the connection element and the supply line connection elements or the connection element carrier, a defined installation position can be achieved, through which a defined adaptation to the course of a cable harness in a vehicle or supply lines provided therein is achieved. which avoids unnecessary bends or deformations in the area of a supply line to be connected to such a connection unit.
- the force with which the connecting element is held prestressed in relation to the connecting element carrier, in particular is held prestressed in the axial direction is freely adjustable, it is possible to achieve adjustments to different geometric tolerances and, due to the type of force transmission provided, also one to avoid excessive loading of the insulating elements constructed with electrically insulating material and realizing the axial support.
- connection unit can of course also be used in other areas of application in which electrical contacting of two system areas through a wall is to be provided through.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Eine Anschlusseinheit zum Anschließen einer elektrischen Versorgungsleitung an einen Abgasheizer einer Abgasanlage einer Brennkraftmaschine umfasst ein in Richtung einer Längsachse (L) langgestrecktes, elektrisch leitendes Anschlusselement (34), wobei das Anschlusselement (34) in einem ersten axialen Endbereich (38) einen Abgasheizer-Anschlussbereich (46) aufweist und in einem zweiten axialen Endbereich (44) einen Versorgungsleitung-Anschlussbereich (40) aufweist, einen Anschlusselementträger (24) mit einer Anschlusselement-Aufnahmeöffnung (26), wobei das Anschlusselement (34) mit einem zwischen dem ersten axialen Endbereich (38) und dem zweiten axialen Endbereich (44) liegenden Tragebereich (62) die Anschlusselement-Aufnahmeöffnung (26) durchsetzt, ein in der Anschlusselement-Aufnahmeöffnung (26) angeordnetes, den Tragebereich (62) umgebendes erstes Isolierelement (64), ein an einer dem ersten axialen Endbereich (38) des Anschlusselements (34) zugewandten ersten Stirnseite (28) des Anschlusselementträgers (24) angeordnetes zweites Isolierelement (66), wobei das Anschlusselement (34) über das zweite Isolierelement (66) axial bezüglich der ersten Stirnseite (28) des Anschlusselementträgers (24) abgestützt ist, sowie ein an einer dem zweiten axialen Endbereich (44) des Anschlusselements (34) zugewandten zweiten Stirnseite (30) des Anschlusselementträgers (24) angeordnetes drittes Isolierelement (72), wobei das Anschlusselement (34) über das dritte Isolierelement (72) axial bezüglich der zweiten Stirnseite des Anschlusselementträgers abgestützt ist.A connection unit for connecting an electrical supply line to an exhaust gas heater of an exhaust system of an internal combustion engine comprises an electrically conductive connection element (34) which is elongated in the direction of a longitudinal axis (L), the connection element (34) having an exhaust gas heater connection area in a first axial end area (38). (46) and has a supply line connection area (40) in a second axial end area (44), a connection element carrier (24) with a connection element receiving opening (26), wherein the connection element (34) has a connection element (34) with a between the first axial end area ( 38) and the second axial end area (44) lying supporting area (62) passes through the connecting element receiving opening (26), a in the connecting element receiving opening (26) arranged, surrounding the supporting area (62) first insulating element (64), on a the first axial end region (38) of the connecting element (34) facing the first end face (28) of the An second insulating element (66) arranged on the connecting element carrier (24), wherein the connecting element (34) is supported via the second insulating element (66) axially with respect to the first end face (28) of the connecting element carrier (24), and a second axial end region (44 ) of the connecting element (34) facing the second end face (30) of the connecting element carrier (24) arranged third insulating element (72), wherein the connecting element (34) is supported via the third insulating element (72) axially with respect to the second end face of the connecting element carrier.
Description
Die vorliegende Erfindung betrifft eine Anschlusseinheit, welche dazu genutzt werden kann, einen in einer Abgasanlage einer Brennkraftmaschine vorgesehenen Abgasheizer mit einer zu einer Spannungsquelle führenden elektrischen Versorgungsleitung elektrisch leitend zu verbinden.The present invention relates to a connection unit which can be used to electrically conductively connect an exhaust gas heater provided in an exhaust system of an internal combustion engine to an electrical supply line leading to a voltage source.
Eine derartige Anschlusseinheit ist aus der
Es ist die Aufgabe der vorliegenden Erfindung, eine Anschlusseinheit zum Anschließen einer elektrischen Versorgungsleitung an einen Abgasheizer einer Abgasanlage einer Brennkraftmaschine vorzusehen, mit welcher bei einfacher konstruktiver Ausgestaltung eine gegen die in einer Abgasanlage auftretende thermische Belastung der verschiedenen Komponenten derselben resistente elektrisch isolierte Durchführung vorgesehen werden kann.It is the object of the present invention to provide a connection unit for connecting an electrical supply line to an exhaust gas heater of an exhaust system of an internal combustion engine, with which an electrically insulated bushing resistant to the thermal stress occurring in an exhaust system on the various components of the exhaust system can be provided with a simple structural design .
Erfindungsgemäß wird diese Aufgabe gelöst durch eine Anschlusseinheit zum Anschließen einer elektrischen Versorgungsleitung an einen Abgasheizer einer Abgasanlage einer Brennkraftmaschine, umfassend:
- ein in Richtung einer Längsachse langgestrecktes, elektrisch leitendes Anschlusselement, wobei das Anschlusselement in einem ersten axialen Endbereich einen Abgasheizer-Anschlussbereich aufweist und in einem zweiten axialen Endbereich einen Versorgungsleitung-Anschlussbereich aufweist,
- einen Anschlusselementträger mit einer Anschlusselement-Aufnahmeöffnung, wobei das Anschlusselement mit einem zwischen dem ersten axialen Endbereich und dem zweiten axialen Endbereich liegenden Tragebereich die Anschlusselement-Aufnahmeöffnung durchsetzt,
- ein in der Anschlusselement-Aufnahmeöffnung angeordnetes, den Tragebereich umgebendes erstes Isolierelement,
- ein an einer dem ersten axialen Endbereich des Anschlusselements zugewandten ersten Stirnseite des Anschlusselementträgers angeordnetes zweites Isolierelement, wobei das Anschlusselement über das zweite Isolierelement axial bezüglich der ersten Stirnseite des Anschlusselementträgers abgestützt ist,
- ein an einer dem zweiten axialen Endbereich des Anschlusselements zugewandten zweiten Stirnseite des Anschlusselementträgers angeordnetes drittes Isolierelement, wobei das Anschlusselement über das dritte Isolierelement axial bezüglich der zweiten Stirnseite des Anschlusselementträgers abgestützt ist.
- an electrically conductive connection element elongated in the direction of a longitudinal axis, wherein the connection element has an exhaust gas heater connection area in a first axial end area and has a supply line connection area in a second axial end area,
- a connecting element carrier with a connecting element receiving opening, wherein the connecting element penetrates the connecting element receiving opening with a carrying region located between the first axial end region and the second axial end region,
- a first insulating element which is arranged in the connection element receiving opening and surrounds the carrying area,
- a second insulating element arranged on a first end face of the connecting element carrier facing the first axial end region of the connecting element, the connecting element being supported axially with respect to the first end face of the connecting element carrier via the second insulating element,
- a third insulating element arranged on a second end face of the connecting element carrier facing the second axial end region of the connecting element, the connecting element being supported axially with respect to the second end face of the connecting element carrier via the third insulating element.
Bei der erfindungsgemäß aufgebauten Anschlusseinheit ist ein mehrstückiger bzw. sandwichartiger Aufbau der elektrischen Isolierung zwischen dem Anschlusselement und dem Anschlusselementträger vorgesehen, bei welcher der feste Verbund zwischen dem Anschlusselement und dem Anschlusselementträger im Wesentlichen durch axiale Verspannung zwischen den beiden bezüglich der Stirnseiten des Anschlusselementträgers abgestützten Isolierelementen erfolgt. Dies führt zu einem unterschiedliche thermische Ausdehnungen zulassenden Verbund, welcher beispielsweise eine materialschlüssige Verbindung einzelner Komponenten der Anschlusseinheit miteinander nicht erforderlich macht.In the connection unit constructed according to the invention, a multi-piece or sandwich-like construction of the electrical insulation between the connection element and the connection element carrier is provided, in which the firm bond between the connection element and the connection element carrier is essentially achieved by axial bracing between the two insulating elements supported with respect to the end faces of the connection element carrier . This leads to a composite that allows different thermal expansions, which, for example, does not require a material-locking connection of individual components of the connection unit to one another.
Um thermisch bedingte Relativbewegungen zuzulassen, wird vorgeschlagen, dass das erste Isolierelement, das zweite Isolierelement und das dritte Isolierelement als separate Bauteile ausgebildet sind.In order to allow thermally induced relative movements, it is proposed that the first insulating element, the second insulating element and the third insulating element are designed as separate components.
Zum Erreichen einer effizienten elektrischen Isolierung zwischen dem Anschlusselement und dem Anschlusselementträger kann das erste Isolierelement als Isolierhülse ausgebildet sein, oder/und kann das zweite Isolierelement als Isolierscheibe ausgebildet sein, oder/und kann das dritte Isolierelement als Isolierscheibe ausgebildet sein. Es ist in diesem Zusammenhang darauf hinzuweisen, dass bei derartigen ringartig ausgestalteten und von dem Anschlusselement durchsetzten Komponenten der Anschlusseinheit von einer hülsenartigen Struktur dann ausgegangen werden kann, wenn eine radiale Wandstärke der betrachteten Komponente kleiner ist, als die axiale Erstreckungslänge dieser Komponente, während von einer scheibenartigen Struktur dann ausgegangen werden kann, wenn die radiale Wandstärke der betrachteten Komponente im Bereich der radialen Wandstärke oder kleiner als diese ist.To achieve efficient electrical insulation between the connection element and the connection element carrier, the first insulating element can be designed as an insulating sleeve and/or the second insulating element can be designed as an insulating disk and/or the third insulating element can be designed as an insulating disk. It should be pointed out in this context that with such ring-shaped components of the connection unit and penetrated by the connection element, a sleeve-like structure can be assumed if a radial wall thickness of the component under consideration is smaller than the axial length of this component, while a disk-like structure can be assumed if the radial wall thickness of the component under consideration is in the range of the radial wall thickness or smaller than this.
Um axiale Zwängungen des ersten Isolierelements zu vermeiden, wird vorgeschlagen, dass eine axiale Erstreckungslänge des ersten Isolierelements kleiner ist, als ein axialer Abstand des zweiten Isolierelements zum dritten Isolierelement, oder/und dass zwischen dem ersten Isolierelement und wenigstens einem Isolierelement von zweitem Isolierelement und drittem Isolierelement ein axialer Zwischenraum gebildet ist, oder/und dass eine axiale Erstreckungslänge des ersten Isolierelements kleiner ist als eine axiale Erstreckungslänge der Anschlusselement-Aufnahmeöffnung.In order to avoid axial constraint on the first insulating element, it is proposed that an axial extension length of the first insulating element be smaller than an axial distance between the second insulating element and the third insulating element, and/or that between the first insulating element and at least one insulating element of the second insulating element and the third An axial gap is formed in the insulating element, and/or that an axial length of extension of the first insulating element is smaller than an axial length of extension of the connecting element receiving opening.
Zur axialen Abstützung des Anschlusselements bezüglich des Anschlusselementträgers an dessen axialen Stirnseiten kann das Anschlusselement über eine erste Widerlageranordnung an dem zweiten Isolierelement axial abgestützt sein und über eine zweite Widerlageranordnung an dem dritten Isolierelement axial abgestützt sein.For axial support of the connection element with respect to the connection element carrier on its axial end faces, the connection element can be supported axially on the second insulating element via a first abutment arrangement and on the third insulating element via a second abutment arrangement.
Um bei einfacher baulicher Struktur eine Montage der erfindungsgemäßen Anschlusseinheit zu ermöglichen, wird vorgeschlagen, dass eine Widerlageranordnung von erster Widerlageranordnung und zweiter Widerlageranordnung, vorzugsweise die erste Widerlageranordnung, einen an dem Anschlusselement fest vorgesehenen, nach radial außen hervorstehenden Widerlagervorsprung umfasst, oder/und dass eine Widerlageranordnung von erster Widerlageranordnung und zweiter Widerlageranordnung, vorzugsweise die zweite Widerlageranordnung, ein mit dem Anschlusselement bezüglich diesem axialen verlagerbar gekoppeltes Widerlagerelement umfasst.In order to enable assembly of the connection unit according to the invention with a simple structural structure, it is proposed that an abutment arrangement of the first abutment arrangement and second abutment arrangement, preferably the first abutment arrangement, comprises an abutment projection that is provided fixed on the connection element and protrudes radially outwards, and/or that a The abutment arrangement of the first abutment arrangement and the second abutment arrangement, preferably the second abutment arrangement, comprises an abutment element coupled to the connecting element such that it can be displaced axially.
Dabei kann für die Erzeugung einer definierten axialen Einspannkraft das Widerlagerelement mit dem Anschlusselement durch Gewindeeingriff gekoppelt sein.In order to generate a defined axial clamping force, the abutment element can be coupled to the connection element by threaded engagement.
Zum Ermöglichen unterschiedlicher thermischer Ausdehnungen kann wenigstens eine Widerlageranordnung von erster Widerlageranordnung und zweiter Widerlageranordnung, vorzugsweise die zweite Widerlageranordnung, wenigstens ein axialelastisches Abstützelement im Abstützweg zwischen dem Anschlusselement und dem Anschlusselementträger umfassen.To enable different thermal expansions, at least one abutment arrangement of the first abutment arrangement and second abutment arrangement, preferably the second abutment arrangement, can comprise at least one axially elastic support element in the support path between the connection element and the connection element carrier.
Das wenigstens eine axialelastische Abstützelement kann beispielsweise als Tellerfeder oder Wellfeder ausgebildet sein.The at least one axially elastic support element can be designed, for example, as a cup spring or corrugated spring.
Um eine definierte Positionierung der Anschlusseinheit an einer mit dieser zu verbindenden Außenwand einer Abgasführungskomponente zu gewährleisten, wird vorgeschlagen, dass an der ersten axialen Stirnseite des Anschlusselementträgers ein die Anschlusselement-Aufnahmeöffnung umgebender Zentriervorsprung vorgesehen ist. Ein derartiger Zentriervorsprung kann in eine von der Anschlusseinheit durchsetzte Öffnung in einer derartigen Wandung eingreifend und dadurch die Anschlusseinheit zentrierend positioniert werden.In order to ensure a defined positioning of the connection unit on an outer wall of an exhaust gas routing component to be connected thereto, it is proposed that a centering projection surrounding the connection element receiving opening be provided on the first axial end face of the connection element carrier. Such a centering projection can engage in an opening in such a wall, through which the connection unit passes, and thereby center the connection unit.
Das zweite Isolierelement kann axial an dem Zentriervorsprung abgestützt sein, da dieser den axial am weitesten hervorstehenden Bereich des Anschlusselementträgers bildet.The second insulating element can be supported axially on the centering projection, since this forms the axially most protruding area of the connection element carrier.
Um eine Verbindung mit einer zu einer Spannungsquelle führenden Versorgungsleitung herstellen zu können, kann die Anschlusseinheit ein mit dem Anschlusselement in seinem Versorgungsleitung-Anschlussbereich gekoppeltes oder koppelbares Versorgungsleitung-Anschlusselement umfassen.In order to be able to establish a connection to a supply line leading to a voltage source, the connection unit can comprise a supply line connection element which is or can be coupled to the connection element in its supply line connection area.
Zur Vorgabe einer definierten Relativpositionierung zwischen einer derartigen Versorgungsleitung und der Anschlusseinheit kann das Versorgungsleitung-Anschlusselement durch eine Formschluss-Positionierformation bezüglich des Versorgungsleitung-Anschlussbereichs in vorgegebener Position um die Längsachse gehalten sein.In order to specify a defined relative positioning between such a supply line and the connection unit, the supply line connection element can be held in a predetermined position about the longitudinal axis with respect to the supply line connection area by means of a form-fit positioning formation.
Um auch für das Anschlusselement eine definierte Positionierung bezüglich des Anschlusselementträgers zu erreichen, wird vorgeschlagen, dass das Anschlusselement durch Reibschluss oder/und Formschluss bezüglich des Anschlusselementträgers drehfest gehalten ist. Dabei ist es besonders vorteilhaft, wenn ein derartiger Reibschluss oder/und Formschluss nur oder im wesentlichen nur im Bereich der beispielsweise scheibenartig ausgebildeten zweiten und dritten Isolierelemente vorgesehen ist, während das erste Isolierelement im Wesentlichen dazu dient, das Anschlusselement in der Anschlusselement-Aufnahmeöffnung zentriert und elektrisch isoliert zu halten, ohne jedoch wesentliche Kräfte, insbesondere in Umfangsrichtung wirkende Kräfte, zwischen dem Anschlusselement und dem Anschlusselementträger zu übertragen.In order to also achieve a defined positioning for the connection element with respect to the connection element carrier, it is proposed that the connection element be held in a rotationally fixed manner with respect to the connection element carrier by means of frictional engagement and/or positive engagement. It is particularly advantageous if such a frictional connection and/or positive connection is provided only or essentially only in the area of the second and third insulating elements, which are designed like disks, for example, while the first insulating element essentially serves to center the connecting element in the connecting element receiving opening and to keep electrically isolated, but without significant forces, especially forces acting in the circumferential direction, to transfer between the connection element and the connection element carrier.
Die Erfindung betrifft ferner eine Abgasanlage für eine Brennkraftmaschine, umfassend ein Abgasführungselement mit einer Außenwand und einem von der Außenwand umgebenen Abgasströmungsraum, einen in dem Abgasströmungsraum angeordneten Abgasheizer und wenigstens eine an der Außenwand festgelegte Anschlusseinheit mit erfindungsgemäßem Aufbau, wobei der Abgasheizer-Anschlussbereich der wenigstens einen Anschlusseinheit mit dem Abgasheizer elektrisch leitend verbunden ist.The invention also relates to an exhaust system for an internal combustion engine, comprising an exhaust gas routing element with an outer wall and an exhaust gas flow space surrounded by the outer wall, an exhaust gas heater arranged in the exhaust gas flow space and at least one connection unit fixed to the outer wall and having a structure according to the invention, the exhaust gas heater connection area of the at least one Connection unit is electrically connected to the exhaust gas heater.
Die vorliegende Erfindung wird nachfolgend mit Bezug auf die beiliegenden Figuren detailliert beschrieben. Es zeigt:
- Fig. 1
- eine an einer Außenwand eines Abgasführungselements einer Abgasanlage angeordnete Anschlusseinheit;
- Fig. 2
- die Anschlusseinheit der
Fig. 1 im Längsschnitt, geschnitten längs einer Linie II-II inFig. 1 ; - Fig. 3
- die Anschlusseinheit der
Fig. 1 im Querschnitt, geschnitten längs einer Linie III-III inFig. 2 ; - Fig. 4
- ein Anschlusselement der Anschlusseinheit der
Fig. 1 in perspektivischer Ansicht, - Fig. 5
- ein Versorgungsleitung-Anschlusselement der Anschlusseinheit der
Fig. 1 in perspektivischer Ansicht; - Fig. 6
- eine der
Fig. 2 entsprechende Längsschnittansicht einer Anschlusseinheit mit alternativer Ausgestaltung insbesondere eines Versorgungsleitung-Anschlusselements derselben; - Fig. 7
- eine Querschnittansicht der Anschlusseinheit der
Fig. 6 , geschnitten längs einer Linie VII-VII inFig. 6 ; - Fig. 8
- ein Anschlusselement der Anschlusseinheit der
Fig. 6 in perspektivischer Darstellung; - Fig. 9
- ein Versorgungsleitung-Anschlusselement der Anschlusseinheit der
Fig. 6 in perspektivischer Ansicht; - Fig. 10
- eine prinzipartige Längsschnittansicht eines Anschlusselementträgers mit daran vorgesehenen Isolierelementen.
- 1
- a connection unit arranged on an outer wall of an exhaust gas routing element of an exhaust system;
- 2
- the connection unit
1 in longitudinal section, cut along a line II-II in1 ; - 3
- the connection unit
1 in cross-section, cut along a line III-III in2 ; - 4
- a connection element of the connection unit
1 in perspective view, - figure 5
- a supply line connection element of the connection unit
1 in perspective view; - 6
- one of the
2 corresponding longitudinal sectional view of a connection unit with an alternative configuration, in particular of a supply line connection element of the same; - 7
- a cross-sectional view of the connection unit of FIG
6 , cut along a line VII-VII in6 ; - 8
- a connection element of the connection unit
6 in perspective view; - 9
- a supply line connection element of the connection unit
6 in perspective view; - 10
- a principle-like longitudinal sectional view of a connection element carrier with insulating elements provided thereon.
In
Im Bereich einer in der Außenwand 12 vorgesehenen Öffnung 20 ist eine allgemein mit 22 bezeichnete Anschlusseinheit vorgesehen und an der Außenwand 12 beispielsweise durch Verschweißung den Abgasströmungsraum 16 gasdicht abschließend festgelegt. Die Anschlusseinheit 22 stellt eine elektrische Durchführung durch die Außenwand 12 bereit, über welche eine in einem Fahrzeug vorgesehene Spannungsquelle mit dem Abgasheizer 18 elektrisch leitend verbunden werden kann. Um beide Pole einer derartigen Spannungsquelle mit dem Abgasheizer 18 zu verbinden, können beispielsweise zwei derartige Anschlusseinheiten 22 vorgesehen sein. Sind mehrere Abgasheizer 18 in der Abgasanlage 10 beispielsweise an unterschiedlichen axialen Positionen vorgesehen sein, können in Zuordnung zu jedem Abgasheizer 18 beispielsweise zwei derartige Anschlusseinheiten 22 vorgesehen sein.In the area of an
Die in den
Um eine definierte Positionierung der Anschlusseinheit 22 in der Öffnung 20 der Außenwand 12 zu gewährleisten, kann an der ersten Stirnseite 28 ein Zentriervorsprung 32 gebildet sein, welcher radial so dimensioniert sein kann, dass er mit geringem radialen Bewegungsspiel, radial bezüglich einer Längsachse L eines elektrisch leitenden Anschlusselements 34 bzw. der gesamten Anschlusseinheit 22, in die Öffnung 20 eingreifend positioniert werden kann.In order to ensure a defined positioning of the
Mit einem über den Zentriervorsprung 32 nach radial außen hervorstehenden flanschartigen Randbereich 36 liegt der Anschlusselementträger 24 an der Außenseite der Außenwand 12 an und kann mit dieser beispielsweise durch eine außen umlaufende Schweißnaht fest und gasdicht verbunden sein.The connecting
Das die Anschlusselement-Aufnahmeöffnung 26 im Anschlusselementträger 24 durchsetzende Anschlusselement 34 weist in einem in den Abgasströmungsraum 16 eingreifend zu positionierenden ersten axialen Endbereich 38 einen Abgasheizer-Anschlussbereich 40 auf, in welchem eine in
An einem zweiten axialen Endbereich 44 des Anschlusselements 34 ist ein Versorgungsleitung-Anschlussbereich 46 gebildet. Dieser weist einen sich beispielsweise konisch in Richtung vom ersten Endbereich 38 weg verjüngenden Kontaktbereich 48 und einen daran axial anschließenden Außengewindebereich 50 auf. Auf den Kontaktbereich 48 wird ein Versorgungsleitung-Anschlusselement 52 mit einem hülsenartigen Gegen-Kontaktbereich 54 aufgeschoben. Ist dies erreicht, wird auf den Außengewindebereich 50 ein nicht dargestelltes Mutterelement aufgeschraubt, um das Versorgungsleitung-Anschlusselement 52 gegen den Kontaktbereich 48 vorzuspannen und an den Anschlusselement 34 festzuhalten.A supply
Um dabei für eine mit dem Versorgungsleitung-Anschlusselement 52 beispielsweise durch Verklemmung fest zu verbindende Versorgungsleitung in einem Fahrzeug eine definierte Anschlussposition vorzugeben, ist eine Formschluss-Positionierformation 56 vorgesehen, welche an dem Anschlusselement 34, insbesondere dem Kontaktbereich 48 desselben an einer Umfangsposition einen nach radial außen vorspringenden Formschlussvorsprung 58 und an dem hülsenartigen Gegen-Kontaktbereich 54 des Versorgungsleitung-Anschlusselements 52 eine axial offene Formschlussaussparung 60 umfasst. Beim axialen Aufschieben des Versorgungsleitung-Anschlusselements 52 auf den Versorgungsleitung-Anschlussbereich 46 des Anschlusselements 34 werden die Formschlussaussparung 60 und der Formschlussvorsprung 58 in Umfangsrichtung zueinander ausgerichtet positioniert, so dass der Formschlussvorsprung 58 in die Formschlussaussparung 60 eintreten kann, wenn das Versorgungsleitung-Anschlusselement 52 axial auf den Kontaktbereich 48 aufgeschoben wird. Auf diese Art und Weise ist eine definierte Umfangspositionierung für das Versorgungsleitung-Anschlusselement 52 bezüglich des Anschlusselements 34 um dessen Längsachse L vorgegeben.In order to specify a defined connection position for a supply line in a vehicle that is to be firmly connected to the supply
Um das Anschlusselement 34 in definierter Positionierung elektrisch isoliert bezüglich des Anschlusselementträgers 24 zu halten, ist ein zwischen den beiden axialen Endbereichen 38, 44 des Anschlusselements 34 positionierter und die Anschlusselement-Aufnahmeöffnung 26 durchsetzender Tragebereich 62 des Anschlusselements 34 von einem hülsenartig ausgebildeten ersten Isolierelement 64 umgeben. Das mit elektrisch isolierendem Material, beispielsweise gesintertem Keramikmaterial oder dergleichen, aufgebaute erste Isolierelement 64 umgibt den Tragebereich 62 im Wesentlichen spielfrei, jedoch auch ohne wesentliche Reibwechselwirkung. Das erste Isolierelement 64 ist in der Anschlusselement-Aufnahmeöffnung 26 positioniert und liegt an einer die Anschlusselement-Aufnahmeöffnung 26 umgebenden Innenumfangsfläche des Anschlusselementträgers 24 ohne die Erzeugung wesentlicher Reibkräfte an. Durch das erste Isolierelement 64 ist somit das Anschlusselement 34 im Bereich seines die Anschlusselement-Aufnahmeöffnung 26 dursetzende Tragebereichs 62 elektrisch isoliert und zentriert in der Anschlusselement-Aufnahmeöffnung 26 getragen, ohne dass dabei zwischen dem Anschlusselement 34 und dem Anschlusselementträger 24 wesentliche Drehmomente übertragen werden können.In order to keep the connecting
An der dem Abgasströmungsraum 16 zugewandt zu positionierenden ersten Stirnseite 28 des Anschlusselementträgers 24 ist ein scheibenartig bzw. ringscheibenartig ausgebildetes zweites Isolierelement 66 aus elektrisch isolierendem Material, beispielsweise gesintertem Keramikmaterial oder dergleichen, angeordnet. Das zweite Isolierelement 66 ist im Bereich des Zentriervorsprungs 32 am Anschlusselementträger 24 axial abgestützt.A disk-like or annular disk-like second
In Zuordnung zu dem zweiten Isolierelement 66 ist zur axialen Abstützung des Anschlusselements 34 eine allgemein mit 68 bezeichnete erste Widerlageranordnung vorgesehen. Diese umfasst einen am Anschlusselement 34 beispielsweise als integraler Bestandteil desselben vorgesehenen, nach radial außen vorspringenden, flanschartigen und in Umfangsrichtung vorzugsweise im Wesentlichen vollständig umlaufenden Widerlagervorsprung 70. Vermittels des Widerlagervorsprungs 70 ist das Anschlusselement 34 über das zweite Isolierelement 66 am Anschlusselementträger 24 in einer ersten axialen Richtung, insbesondere in einer Richtung vom Abgasströmungsraum 16 weg, abgestützt.In association with the second insulating
Zur axialen Abstützung bezüglich der zweiten Stirnseite 30 ist ein scheibenartig bzw. ringscheibenartig ausgebildetes drittes Isolierelement 72 aus elektrisch isolierendem Material, beispielsweise gesintertem Keramikmaterial oder dergleichen, vorgesehen. Zur axialen Abstützung des Anschlusselements 34 in einer der ersten axialen Richtung entgegengesetzten zweiten axialen Richtung in Richtung auf den Abgasströmungsraum 16 zu ist eine allgemein mit 73 bezeichnete zweite Widerlageranordnung vorgesehen. Die zweite Widerlageranordnung 73 umfasst ein beispielsweise aus Metallmaterial aufgebautes, als Widerlagerelement 74 wirkendes Mutterelement mit Innengewinde, welches auf ein im Bereich des Tragebereichs 62 des Anschlusselements 34 vorgesehenes Außengewinde 76 aufgeschraubt ist, so dass durch Drehen des Mutterelements bezüglich des Anschlusselements 34 das Mutterelement axial bezüglich des Anschlusselements 34 verlagert wird.For axial support with respect to the
Axial zwischen dem Widerlagerelement 74 der zweiten Widerlageranordnung 73 und dem zweiten Isolierelement 72 sind ein beispielsweise als Tellerfeder oder Wellfeder ausgebildetes, axialelastisches Abstützelement 78 und eine beispielsweise aus Metallmaterial aufgebaute Zwischenscheibe 80 angeordnet. Durch die Zwischenscheibe 80 wird eine gleichmäßige Belastung des zweiten Isolierelements 72 mit der durch das axialelastische Abstützelement 78 generierten bzw. übertragenden Axiallast gewährleistet, auch wenn das axialelastische Abstützelement bei Ausgestaltung als Tellerfeder oder Wellfeder nur in beschränkten Radialbereichen bzw. Umfangsbereichen an der Zwischenscheibe 80 abgestützt ist.Arranged axially between the
Durch die Zusammenwirkung der beiden Widerlageranordnungen 68, 73 wird eine definierte axiale Einspannung des Anschlusselements 34 unter Zwischenlagerung der mit den drei Isolierelementen 64, 66 und 72 gebildeten, sandwichartigen Isolierung gewährleistet. Durch das Vorsehen des axialelastischen Abstützelements 78 im axialen Abstützweg bzw. Kraftübertragungsweg zwischen dem Anschlusselement 34 und dem Anschlusselementträger 24 werden unterschiedliche thermische Ausdehnungen der auch unterschiedlich stark thermisch belasteten und möglicherweise aus unterschiedlichen Materialien bestehenden Bauteile der Anschlusseinheit 22 zugelassen, ohne dass lokale Verspannungen oder Überlastungen erzeugt werden. Die axiale Einspannkraft kann durch das definierte Aufschrauben des Widerlagerelements 74 auf das Außengewinde 76 eingestellt werden. Eine definierte Drehpositionierung des Anschlusselements 34 bezüglich des Anschlusselementträgers 36 wird dabei durch die zwischen den verschiedenen axial aufeinander folgenden und reibend aneinander anliegenden Komponenten erreicht. Um die Drehpositionierung des Anschlusselements 34 bezüglich des Anschlusselementträgers 24 weiter definiert vorgeben zu können, könnte beispielsweise an der ersten Stirnseite 28 des Anschlusselementträgers 24 eine mit dem zweiten Isolierelement 66 zusammenwirkende Formschluss-Positionierformation vorgesehen sein, welche die Drehposition des zweiten Isolierelements 66 bezüglich des Anschlusselementträgers 24 vorgibt, beispielsweise durch einen oder mehrere in zugeordneter Formschlussaussparungen axial eingreifende Formschlussvorsprünge. Entsprechend könnte zwischen dem zweiten Isolierelement 66 und dem Widerlagersprung 70 des Anschlusselements 34 eine Formschluss-Positionierformation wirken, um die Drehpositionierung des Anschlusselements 34 bezüglich des zweiten Isolierelements 66 und über dieses bezüglich des Anschlusselementträgers 24 vorzugeben.The interaction of the two
Um das Entstehen von Zwängungen bzw. lokalen Überlastungen insbesondere bei thermisch bedingten Abmessungsänderungen zu vermeiden, ist, wie dies in
Das erste Isolierelement 64 könnte in der Anschlusselement-Aufnahmeöffnung 26 beispielsweise auch derart positioniert sein, dass es in Anlagekontakt mit dem radial inneren Bereich von einem der beiden scheibenartigen Isolierelemente 66, 72 ist, zum anderen der beiden scheibenartigen Isolierelemente 66, 72 jedoch den axialen Zwischenraum oder einen größeren axialen Zwischenraum aufweist, als in
Eine abgewandelte Ausgestaltungsart der Anschlusseinheit 22 ist in den
Ein baulicher Unterschied besteht aber in der Ausgestaltung der zwischen dem Anschlusselement 34 und dem Versorgungsleitung-Anschlusselement 52 wirkenden Formschluss-Positionierformation 56. Diese umfasst bei dem in den
Bei dem erfindungsgemäßen Aufbau einer Anschlusseinheit ist eine baulich einfach realisierte, leicht herzustellende und mechanisch stabile Ausgestaltung vorgesehen, welche auch bei starker thermischer Belastung das Bestehen lokaler Überlastungsbereiche durch verschiedene thermische Ausdehnungen vermeidet. Durch die Möglichkeit, definierte Drehpositionierungen zwischen dem Anschlusselement und dem Versorgungsleitung-Anschlusselementen bzw. dem Anschlusselementträger vorgeben zu können, kann eine definierte Einbauposition erreicht werden, durch welche eine definierte Anpassung an den Verlauf eines Kabelbaums in einem Fahrzeug bzw. darin vorgesehene Versorgungsleitungen erreicht wird, welche unnötige Biegungen oder Verformungen im Bereich einer mit einer derartigen Anschlusseinheit zu verbindenden Versorgungsleitung vermeidet. Da die Kraft, mit welcher das Anschlusselement bezüglich des Anschlusselementträgers vorgespannt gehalten ist, insbesondere in axialer Richtung vorgespannt gehalten ist, frei einstellbar ist, ist es möglich, Anpassungen an verschiedene geometrische Toleranzen zu erreichen und, aufgrund der vorgesehenen Art und Weise der Kraftübertragung auch eine übermäßige Belastung der mit elektrisch isolierendem Material aufgebauten und die axiale Abstützung realisierenden Isolierelemente zu vermeiden.In the construction of a connection unit according to the invention, a structurally simple, easy-to-manufacture and mechanically stable design is provided, which avoids the existence of local overload areas due to various thermal expansions even under high thermal stress. Due to the possibility of being able to specify defined rotational positions between the connection element and the supply line connection elements or the connection element carrier, a defined installation position can be achieved, through which a defined adaptation to the course of a cable harness in a vehicle or supply lines provided therein is achieved. which avoids unnecessary bends or deformations in the area of a supply line to be connected to such a connection unit. Since the force with which the connecting element is held prestressed in relation to the connecting element carrier, in particular is held prestressed in the axial direction, is freely adjustable, it is possible to achieve adjustments to different geometric tolerances and, due to the type of force transmission provided, also one to avoid excessive loading of the insulating elements constructed with electrically insulating material and realizing the axial support.
Abschließend ist darauf hinzuweisen, dass, obgleich der vorangehende Einsatz in Verbindung mit einer Abgasanlage und einem mit einer Versorgungsspannung zu beaufschlagenden Abgasheizer besonders vorteilhaft ist, eine derartige Anschlusseinheit selbstverständlich auch in anderen Anwendungsbereichen eingesetzt werden kann, in welchen eine elektrische Kontaktierung zweier Systembereiche durch eine Wand hindurch vorzusehen ist.Finally, it should be pointed out that although the above use in connection with an exhaust system and an exhaust gas heater to which a supply voltage is to be applied is particularly advantageous, such a connection unit can of course also be used in other areas of application in which electrical contacting of two system areas through a wall is to be provided through.
Claims (15)
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DE102021121835.7A DE102021121835A1 (en) | 2021-08-24 | 2021-08-24 | connection unit |
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EP4141224A1 true EP4141224A1 (en) | 2023-03-01 |
EP4141224B1 EP4141224B1 (en) | 2024-02-21 |
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Family Applications (1)
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EP22186598.3A Active EP4141224B1 (en) | 2021-08-24 | 2022-07-24 | Connection unit |
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US (1) | US11879372B2 (en) |
EP (1) | EP4141224B1 (en) |
JP (1) | JP7425842B2 (en) |
CN (1) | CN115719895A (en) |
DE (1) | DE102021121835A1 (en) |
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DE3531827A1 (en) * | 1984-09-10 | 1986-03-20 | Abar Ipsen Industries, Feasterville, Pa. | ELECTRICALLY HEATED OVEN FOR CARRYING OUT A HEAT TREATMENT |
EP0739152B1 (en) * | 1995-04-17 | 2001-09-19 | Ngk Insulators, Ltd. | Electrode structure and electric heater |
EP0942158B1 (en) * | 1998-03-12 | 2004-10-13 | Honda Giken Kogyo Kabushiki Kaisha | Heating device for an exhaust gas purification catalytic converter |
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DE102019121345A1 (en) * | 2019-08-07 | 2021-02-11 | Faurecia Emissions Control Technologies, Germany Gmbh | Heating device for preheating an exhaust gas flow and vehicle |
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DE102012005786A1 (en) | 2012-03-21 | 2013-09-26 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Non-rotating electrical connection, in particular for an electrically heatable honeycomb body |
CN104131866A (en) * | 2013-04-30 | 2014-11-05 | 住友电装株式会社 | Harness for electric heating catalyst |
WO2020145050A1 (en) | 2019-01-09 | 2020-07-16 | マレリ株式会社 | Exhaust gas treatment device |
JP2020143662A (en) | 2019-01-09 | 2020-09-10 | マレリ株式会社 | Catalyst converter and electrode cover for electro-thermal catalyst |
DE102019210368B4 (en) * | 2019-07-12 | 2024-05-08 | Vitesco Technologies GmbH | Electrical power feedthrough |
-
2021
- 2021-08-24 DE DE102021121835.7A patent/DE102021121835A1/en active Pending
-
2022
- 2022-07-24 EP EP22186598.3A patent/EP4141224B1/en active Active
- 2022-08-23 JP JP2022132231A patent/JP7425842B2/en active Active
- 2022-08-23 US US17/893,927 patent/US11879372B2/en active Active
- 2022-08-24 CN CN202211015991.1A patent/CN115719895A/en active Pending
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DE3531827A1 (en) * | 1984-09-10 | 1986-03-20 | Abar Ipsen Industries, Feasterville, Pa. | ELECTRICALLY HEATED OVEN FOR CARRYING OUT A HEAT TREATMENT |
DE69533609T2 (en) * | 1994-12-07 | 2005-10-13 | Ngk Insulators, Ltd., Nagoya | Electrode structure and electrical heating element containing the same |
EP0739152B1 (en) * | 1995-04-17 | 2001-09-19 | Ngk Insulators, Ltd. | Electrode structure and electric heater |
EP0942158B1 (en) * | 1998-03-12 | 2004-10-13 | Honda Giken Kogyo Kabushiki Kaisha | Heating device for an exhaust gas purification catalytic converter |
US10941688B2 (en) | 2016-05-30 | 2021-03-09 | Vitesco Technologies GmbH | Electrical connection, in particular for an electrically heatable honeycomb body |
DE102019121345A1 (en) * | 2019-08-07 | 2021-02-11 | Faurecia Emissions Control Technologies, Germany Gmbh | Heating device for preheating an exhaust gas flow and vehicle |
Also Published As
Publication number | Publication date |
---|---|
US20230067074A1 (en) | 2023-03-02 |
JP2023031299A (en) | 2023-03-08 |
KR20230029558A (en) | 2023-03-03 |
DE102021121835A1 (en) | 2023-03-02 |
US11879372B2 (en) | 2024-01-23 |
CN115719895A (en) | 2023-02-28 |
JP7425842B2 (en) | 2024-01-31 |
EP4141224B1 (en) | 2024-02-21 |
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