WO2020148006A1 - Système de blindage thermique pour un capteur exposé à l'action d'une température élevée, et logement de capteur associé - Google Patents

Système de blindage thermique pour un capteur exposé à l'action d'une température élevée, et logement de capteur associé Download PDF

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Publication number
WO2020148006A1
WO2020148006A1 PCT/EP2019/082246 EP2019082246W WO2020148006A1 WO 2020148006 A1 WO2020148006 A1 WO 2020148006A1 EP 2019082246 W EP2019082246 W EP 2019082246W WO 2020148006 A1 WO2020148006 A1 WO 2020148006A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
coupling element
heat shielding
elastically deformable
heat
Prior art date
Application number
PCT/EP2019/082246
Other languages
German (de)
English (en)
Inventor
Alwin Geiser
Original Assignee
Elringklinger Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Elringklinger Ag filed Critical Elringklinger Ag
Publication of WO2020148006A1 publication Critical patent/WO2020148006A1/fr

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
    • 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
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
    • G01K13/024—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow of moving gases
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • 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
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2205/00—Application of thermometers in motors, e.g. of a vehicle
    • G01K2205/04—Application of thermometers in motors, e.g. of a vehicle for measuring exhaust gas temperature

Definitions

  • the invention relates to a heat shielding system for a sensor exposed to high temperature, as well as a sensor receptacle therefor.
  • a generic heat shielding system 100 e.g. B. for a lambda sensor of a motor vehicle, is from the prior art
  • such a heat shielding system 100 has a sensor receptacle 101 which has a through opening 102 for a sensor, e.g. B. has a lambda probe (not shown in Figure 3).
  • the sensor receptacle 101 is cup-shaped and has a collar 103 in the axial direction A at its end opposite the through opening 102.
  • the sensor receptacle 101 is surrounded in the circumferential direction by a sealing element 105, which extends radially outward from the cup wall 104.
  • the sealing element 105 is with its radially outer area
  • the heat shield system 100 according to this specification, is arranged between two layers 106a, 106b of a heat shielding part 107.
  • the heat shield system 100 according to this specification, is arranged between two layers 106a, 106b of a heat shielding part 107.
  • Embodiment from the prior art is difficult to assemble, since the sealing element 105 between two layers 106a, 106b of a heat shielding part 107 must be introduced and the two layers 106a, 106b must be attached to each other for local fixing of the sealing element 105, z. B. must be riveted in the vicinity of the sealing element 105. Furthermore, in the generic heat shielding system 100 disadvantage that the entire pre-assembly including the
  • Thickness direction relatively bulky sensor receptacle 101 can be mounted in the vehicle.
  • a heat shielding part with two sheet metal layers 106a, 106b is absolutely necessary to fix the sealing element 105.
  • Another disadvantage is that the prepositioning of the
  • Sheet metal layers 106a, 106b is installed, is not fixed locally.
  • the sealing element 105 can shift during transport, which can slow down the assembly at the installation site.
  • the object of the invention is therefore to provide a heat shielding system which avoids the disadvantages mentioned above from the prior art.
  • Embodiments are specified in the subclaims. Furthermore, these tasks are solved by a sensor receptacle for forming the heat shielding system with the features of claim 13. Advantageous embodiments are given in claims 14 and 15.
  • a heat shield system according to the invention is set up and designed for heat shielding one
  • Internal combustion engine sensor and has at least:
  • the coupling element for axial force transmission, the coupling element only with one of the two free outer sides of the
  • the heat shielding part can first be mounted in a vehicle, and only after it has been positioned in the vehicle, the sensor together with the sensor receptacle with the coupling element interposed in a corresponding opening in the
  • the sensor in can be screwed into the hot gas line in a simple manner. This is particularly easy to achieve, since in a special embodiment the sensor receptacle together with the coupling element has a radial play within the opening in the heat shielding part.
  • Heat shielding system is characterized in that the coupling element for axial force transmission only with the free outside of the heat shielding part, which of the
  • Hot gas line is facing away, cooperates.
  • Heat shielding part can be done here. A slightly larger installation space is generally to be expected there, so that assembly is simplified here.
  • a degree of freedom (distance of the heat shielding part) from the hot gas line in the direct vicinity of the sensor can be limited to a maximum. This is because screwing in the sensor
  • Coupling element the heat shield part is moved towards the hot gas line (with elastic deformation).
  • Heat shielding part which faces the hot gas line, cooperates.
  • Coupling element a structure formed from metal wire, for. B. is a wire mesh, wire mesh, wire tangle or wire scrim.
  • Wire structures in particular formed from metal wire, have provided sufficient heat resistance
  • Coupling elements proven that z. B. are made of a wire mesh, a wire mesh, a tangled wire or a wire scrim.
  • the sensor receptacle is flat-plate or cup-shaped with the push-through opening for the sensor in the flat plate or a bottom of the cup.
  • This configuration ensures good accessibility during assembly / disassembly of the sensor and in the case of a
  • Cup-shaped design of the sensor receptacle also ensures a certain environmental protection of a base section of the sensor.
  • Coupling element surrounds the sensor receptacle radially on the outside and interacts with an axial stop flange of the sensor receptacle.
  • the coupling element is plugged onto the outside of the sensor receptacle in an axial direction and both parts together in a counter-axial direction through the
  • Heat shield can be inserted until that
  • Coupling element comes to rest axially.
  • Sensor receptacle is pressed at least in some areas and is integrally connected to the sensor receptacle, e.g. B.
  • the coupling element can be pressed along its circumferential direction in the radial direction and fastened to the sensor receptacle by means of a weld, preferably a spot weld.
  • Coupling element in cross section is L-shaped and a first Has leg, which is essentially in
  • Axial direction A extends.
  • an outer diameter D ⁇ of the deformable coupling element in the region of the first leg in the axial direction A is smaller than an inner diameter Di one
  • the elastically deformable coupling element in the mounting position of the sensor, together with the sensor receptacle, is biased in the axial direction A against the free outside of the heat shielding part.
  • the senor is an exhaust gas temperature sensor or a lambda sensor.
  • the sensor receptacle and / or the elastically deformable coupling element is formed from a corrosion-resistant metal material.
  • a sensor receptacle according to the invention for forming a heat shielding system according to the invention is thereby
  • the sensor receptacle is arranged surrounding an elastically deformable coupling element which is formed from a wire structure, in particular a metal wire structure.
  • Coupling element is at least locally pressed, that is, is increased compared to the remaining density and is integrally connected to the sensor receptacle in the pressed area.
  • the joining method in particular offers this
  • Figure 1 schematically a cross section through a
  • Heat shield system in a mounted position on a hot gas line
  • Figure 2a a sensor holder according to the invention in a
  • Figure 2b the sensor holder from Figure 2a in a plan view
  • Figure 2c a cross section of the sensor holder according to Figures 2a, 2b along the line AA in Figure 2b;
  • Figure 3 is a perspective sectional view of a
  • FIG. 1 shows a heat shielding system 1 according to the invention in a cross-sectional representation through a sensor 2, which in the present case is designed, for example, as a lambda probe.
  • the lambda probe is usually arranged in a hot gas line 3 and measures a gas component of a
  • Exhaust gas composition e.g. B. an oxygen component.
  • the lambda sensor is exposed to a particularly high thermal load, as it is due to recent developments in the
  • Internal combustion engine is to be arranged, which tends to be exposed to increasing exhaust gas temperatures.
  • Installation locations require a heat shielding part 4, which is to be arranged in the area of the sensor 2 on the hot gas line 3, in order to protect the sensor 2 and any other components present in this area from radiant heat
  • Sensor receptacle 5 is provided, which is essentially pot-shaped or cup-shaped.
  • the sensor receptacle has a bowl wall 6 and a bowl bottom 7, which is connected to a
  • Push-through opening 8 is provided, the passage of the sensor 2, for. B. for the purpose of screwing into the
  • Hot gas line 3 allows.
  • the latter has a collar 9 pointing outwards in a radial direction R.
  • the heat shielding part 4 facing the underside of the collar 9, the sensor receptacle 5 is preferably elastic
  • the heat shielding part 4 is single-layer in the embodiment according to FIG. H. at least in the area of the mounting point of the sensor receptacle 5, and has a first free outer side 11 and a second free outer side 12, the two outer sides being opposite and in the
  • Hot gas line 3 is facing.
  • Single-layer in the aforementioned sense is also to be understood to mean that a heat-shielding part formed from several sheet-metal layers is provided, but which does not have a sufficiently large gap between the sheet-metal layers that the elastically deformable coupling element with a first leg 13 pointing outward in the radial direction R between these layers could be arranged.
  • Shielding system that also single-layer, in particular formed from a single sheet metal heat shielding parts with the
  • Sensor receptacle 5 can be provided with the aid of the coupling element, which is in particular elastically deformable.
  • elastically deformable coupling element 10 includes constructions of coupling elements which have special measures for elastic deformability, for example have a special choice of material, which on the one hand withstand the high temperature loads and on the other hand have a more than microscopic deformability in the forces to be encountered in operation owns.
  • Such an element is, for example, one formed from a deformed / pressed metal knit, tangled metal, knitted metal or metal braid
  • Coupling element A solid steel part, or otherwise a part that cannot be assumed to be deformable in the technical sense, is not considered an elastically deformable coupling element in the sense of the invention, even if theoretically, of course, any force acting on a solid causes a microscopically small elastic deformation.
  • the coupling element becomes
  • Heat shielding part can be made. Nevertheless, there is of course also the possibility, which is not shown in the drawing, however, that the
  • the senor 2 can advantageously be preassembled together with the sensor receptacle 5 and the coupling element 10 on the hot gas line 3, and an assembly of the
  • Heat shielding part 4 only take place later, in which case the heat shielding part 4 is then supported in the vicinity of the
  • Fastening point of the sensor 2 is such that there is a minimum distance between the hot gas line and the
  • Heat shield 4 is set.
  • the collar acts as an axial stop flange 14, by means of which an axial force in the axial direction A can be transmitted to the heat shielding part 4 via the coupling element.
  • a second leg 15 of the coupling element surrounds the
  • Circumferential direction U is preferably on the outside of the cup wall 6 without play.
  • Coupling element 10 is preferably dimensioned such that between the second leg 15 of the coupling element and an edge 16 of a through opening 17, which is provided in the heat shielding part 4, there is a play gap S, which causes a radial displacement of the sensor receptacle 5 together with the coupling element 10
  • Metal wire mesh, metal wire mesh, metal wire mesh, metal wire mesh or the like is formed and has a basic collar-shaped spatial shape with the first leg 13 and the second leg 15.
  • Such a coupling element 10 can, for example
  • the invention therefore proposes, in particular, to provide a portion on the collar 9, which - as described above - acts as an axial stop flange 14, which has a sufficient area in the axial direction, for example, to have a surface
  • tongue-like projections 18 are provided, for example, which offer a sufficient area to
  • tongue-like projections is elastic on the side of the deformable coupling element, a pressed area 19 is provided, in which the elastically deformable coupling element, in particular in the embodiment as a metal wire structure, is pressed in such a way and is thus compressed in such a way that a materially welded connection with the tongue 18 can be produced.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne un système de blindage thermique, lequel est mis au point et est réalisé aux fins du blindage thermique d'un capteur (2) exposé à l'action d'une température élevée, en particulier d'un capteur (2) inséré dans un conduit de gaz chaud (3) d'un moteur à combustion interne. Le système de blindage thermique comprend au moins : une partie de blindage thermique (4) plate servant au blindage thermique de la chaleur dissipée dans le conduit de gaz chaud (3) dans un environnement d'un emplacement de montage du capteur (2) ; un logement de capteur (5) comprenant une ouverture de passage par enfichage (8) pour le capteur, le logement de capteur (5) étant fixé sur le conduit de gaz chaud (3) au moyen du capteur (2) dans un état monté du logement de capteur (5). Un élément de couplage élastiquement déformable coopère d'une part avec le logement de capteur (5) et d'autre part avec la partie de blindage thermique (4) avec transmission de force dans une direction axiale (A). L'élément de couplage coopère seulement avec un des deux côtés extérieurs (11 ; 12) libres de la partie de blindage thermique (4) aux fins de la transmission de force axiale.
PCT/EP2019/082246 2019-01-14 2019-11-22 Système de blindage thermique pour un capteur exposé à l'action d'une température élevée, et logement de capteur associé WO2020148006A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019100791.7 2019-01-14
DE102019100791.7A DE102019100791A1 (de) 2019-01-14 2019-01-14 Wärmeabschirmsystem für einen einer Hochtemperaturbeaufschlagung ausgesetzten Sensor sowie Sensoraufnahme hierfür

Publications (1)

Publication Number Publication Date
WO2020148006A1 true WO2020148006A1 (fr) 2020-07-23

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PCT/EP2019/082246 WO2020148006A1 (fr) 2019-01-14 2019-11-22 Système de blindage thermique pour un capteur exposé à l'action d'une température élevée, et logement de capteur associé

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DE (1) DE102019100791A1 (fr)
WO (1) WO2020148006A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023125138B3 (de) 2023-09-18 2024-08-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Anordnung einer Abgasanlage eines Kraftfahrzeugs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011004618U1 (de) * 2011-03-30 2012-04-02 Reinz-Dichtungs-Gmbh Hitzeschild
DE202011004619U1 (de) * 2011-03-30 2012-04-02 Reinz-Dichtungs-Gmbh Hitzeschild
DE102014104590A1 (de) * 2014-04-01 2015-10-01 Elringklinger Ag Abdeckvorrichtung an einem Anbauteil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1788215A1 (fr) * 2005-11-17 2007-05-23 Ford Global Technologies, LLC Adaptateur pour une ouverture dans un écran thermique, écran thermique et méthode d'installation de l'adaptateur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011004618U1 (de) * 2011-03-30 2012-04-02 Reinz-Dichtungs-Gmbh Hitzeschild
DE202011004619U1 (de) * 2011-03-30 2012-04-02 Reinz-Dichtungs-Gmbh Hitzeschild
DE102014104590A1 (de) * 2014-04-01 2015-10-01 Elringklinger Ag Abdeckvorrichtung an einem Anbauteil

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