CN104569302A - Sensor device for detecting at least one property of a fluid medium - Google Patents
Sensor device for detecting at least one property of a fluid medium Download PDFInfo
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- CN104569302A CN104569302A CN201410557827.2A CN201410557827A CN104569302A CN 104569302 A CN104569302 A CN 104569302A CN 201410557827 A CN201410557827 A CN 201410557827A CN 104569302 A CN104569302 A CN 104569302A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4077—Means for protecting the electrolyte or the electrodes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
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- General Engineering & Computer Science (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The present invention relates to a sensor device (110) for detecting at least one property of a fluid medium (112), in particular an exhaust gas of an internal combustion engine, comprising at least one protective enclosure (114) for receiving at least one sensor element. Here, an inner housing (118) surrounds the sensor element, wherein the inner housing (118) at least is surrounded partly by an outer housing (116). Between the inner housing (118) and the outer housing (116), an intermediate space (120) is formed. At least one ceramic component (122) is introduced into intermediate space (120). According to the invention, the ceramic member (112) at least partially exists in the form of a stretchable porous ceramic textile (124).
Description
Background technology
By the sensor device of at least one characteristic that prior art discloses for test fluid medium, preferred gas.Belong to having of this and there is at least one for detecting the sensor device of the component content particularly sensor element of oxygen content, nitrogen content and/or Gaseous Hydrogen content of at least one characteristic of at least one parameter, the particularly engine exhaust gas of gas, such as waste gas.Can be such as particle load, the temperature of fluid media (medium) and/or pressure by other characteristics that this sensor device detects.This sensor device especially can be lambda probe.Lambda probe is preferably mounted in the waste gas system of internal combustion engine, mainly for detection of the oxygen local pressure in waste gas.Such as at Springer Vieweg, in " sensor in motor vehicle " of 2012 second edition 160-165 page Konrad Reif works, describe lambda probe.
This sensor device particularly has protective housing on the tip of its exhaust gas side, and described protective housing extend in waste gas streams.Described fluid media (medium) from the mechanical load that causes of particle when installing and in waste gas, is guided to the thermal shock from the condensate water of waste gas and the associated of sensor element of the sensor element being arranged in sensor device and protection sensor element for the protection of housing by described protective housing targetedly in sensor device inside.Particularly there will be so-called thermal shock when forming condensing droplet and fall on thermal Ceramics sensor element from waste gas streams, the local temperature produced in sensor element surface is thus poor, described local temperature difference causes the high thermic stress in sensor element, described thermic stress finally can cause the damage of sensor element, even damages.Described protective housing is so formed usually, to such an extent as to the sensor element fluid load occurred in exhaust gas apparatus is reduced to amount harmless for sensor element before dew point as far as possible.In order in addition still protect sensor element from thermal shock, preferably additionally arranging and being used for coating that is heat insulation and/or that combine for liquid.At this particularly advantageously, described coating has pottery, particularly aluminium oxide.
But the requirement under many circumstances for protective housing is contrary.In practice, there is contradiction between requiring in the height protection requirement of particularly thermal shock and the high mobilism of sensor device.This especially means, the measure of the liquid load of the reduced sensor that protective housing is taked usually also causes the reduction of sensor dynamic simultaneously.Its reason is, the gas exchanges as far as possible fast near sensor element can promote the dynamic of sensor device, but can improve the fluid load of sensor element, usually can reduce the protection of thermal shock aspect thus.This means in practice, in selected protective housing, usually can only meet a requirement in high dynamic or high thermal shock protection requirement in a satisfactory manner.
Protective housing self can single type or multi-piece type ground be formed, and wherein, especially often uses and has two protection tubes and the protective housing being therefore also referred to as two protection tube.The protective housing with two-part construction has inner housing usually, and described inner housing surrounds sensor element, and wherein, described inner housing is surrounded by shell body.By this layout, between inner housing and shell body, form a medial compartment, the parts other protection tube, additional wall construction being set if desired in this medial compartment or being arranged on wherein.
To be disclosed in medial compartment by DE 10 2,007 030 795 A1 and particularly arrange in conjunction with the braid of liquid, nonwoven fabrics or knitted fabric on interior protection tube.Such as, be configured to tube-shape by metal, the braid be made up of steel, semimetal or metal oxide or nonwoven fabrics at this, as flexible pipe pushing sleeve to inner housing is fixed on inner housing in this way.Described braid or nonwoven fabrics are particularly made up of the steel identical with inner housing at this.Alternatively, described braid or nonwoven fabrics also can with shape of cushion circlewise around the circumference of inner housing.Described braid or nonwoven fabrics have rough surface, and the drop of appearance can deposit, distributes and evaporate again on described rough surface.Described braid or nonwoven fabrics are so arranged in described medial compartment, to such an extent as to it at least hides the entrance leading to space in inner housing from described medial compartment.
DE 200 04 514 U1 discloses a kind of two-piece type protection tube; in medial compartment between two walls of this two-piece type protection tube, so ceramic fibre material is set, to such an extent as to fluid media (medium) after flowing through described ceramic fibre material, just can only can enter into inner housing be provided with space in sensor element.Described ceramic fibre material can be arranged in the mode of absorbent cotton, animal wool or nonwoven fabrics.In addition, described ceramic fibre material by the embedding of punching press ceramic fiber dish or can be put into by the winding of ceramic fibre strip in described medial compartment.At this, described ceramic fibre material particularly has by Al
2o
3and/or ZrO
2the fiber formed, wherein, ceramic fiber has the thickness of 2-5 μm and the length of at least 1mm.
The flexible pipe that the ceramic fiber that EP 2 554 984 A1 describes a kind of braid form by knitting is formed, it particularly can be put in the interior space between inner housing and shell body.This flexible pipe particularly has the thickness of 1mm and is made up of the ceramic fiber bundle knitted, and described ceramic fiber bundle comprises heat resistance material such as aluminoborosilicate, aluminosilicate or aluminum oxide.
Summary of the invention
The present invention relates to a kind of sensor device, at least one characteristic of test fluid medium, particularly engine exhaust gas, it overcomes known restriction and shortcoming at least to a great extent.This sensor especially at least one characteristic of test fluid medium, the characteristic of preferred engine exhaust gas, the content of such as, oxygen content in waste gas, nitrogen content and/or Gaseous Hydrogen.But also can consider other characteristics detecting described fluid media (medium).Sensor device of the present invention is particularly suitable for using to the scope of 1000 DEG C at high temperature, preferably 600 DEG C due to its structure, but is not limited to this.
Sensor device of the present invention comprises at least one protective housing, and described protective housing is arranged for receiving at least one sensor element and surrounding described sensor element at least in part in order to this object.Protective housing referred to herein as a kind of device, this device be arranged at least for remaining, the mechanical load that occurs when sensor installation device and/or when sensor device runs and/or chemical loads protection sensor element.For this reason, described protective housing is made up of rigid material, particularly metal and/or alloy and/or pottery at least in part, its particularly with usual forces, such as fix described protective housing with the common power of being spirally connected time indeformable.Particularly, described protective housing can be arranged for and externally surround sensor device at least in part and the outer shape at least partially giving sensor device thus.Described protective housing particularly can be arranged for be put in described fluid media (medium) completely or partially, such as, put into the waste gas of engine exhaust gas system.
Described protective housing can be configured to two-piece type or multi-piece type; wherein, described protective housing is particularly configured to two-piece type and correspondingly has independent inner housing, and described inner housing surrounds sensor element at least in part; wherein, described inner housing self is surrounded by a shell body at least in part.At this, described inner housing and described shell body are so arranged toward each other, to such an extent as between described inner housing and described shell body, construct the medial compartment that can load waste gas, and described medial compartment preferably can have the shape of annular space.The other configuration of medial compartment is also admissible.In another configuration, described protective housing can have at least one other protection tube, and it preferably can be put in the medial compartment between described inner housing and described shell body.
The inventive system comprises at least one ceramic component, described ceramic component is put in the medial compartment between inner housing and shell body.At this, " pottery " is interpreted as so a kind of material, and this material is made up of main fine-grained inorganic raw material with two-part manufacture method usually.Be shaped so-called " matrix " by being mainly fine-grained inorganic raw material and and then carrying out drying in all cases in the Part I of described manufacture method.In the Part II of described manufacture method, obtain pottery in the following manner, namely described matrix is experienced one usually above the combustion method of 700 DEG C, obtain lasting hard object body thus.In contrast, so-called " sintering " needs, during combustion process, temperature is brought up at least 1200 DEG C, realizes the remarkable reduction of the factor of porosity of pottery in described sintering method, until eliminate.
The feature of sensor device of the present invention is, the ceramic component putting into the medial compartment between inner housing and shell body using the form of extending concrete dynamic modulus ceramic fabric, particularly as planar two-dimentional textile structural and/or preferably exist as the form of 3 D stereo textile structural." factor of porosity " of body refers to the measurement parameter not having dimension, and it describes the ratio of the cavity volume of this body inside and the cumulative volume of this body.Thus, measuring of what factor of porosity described is in involved body in esse cavity, wherein, the total porosity of an individuality is particularly drawn by the first cavity (it is interconnected and/or is connected with the surrounding environment of this body and therefore its total porosity number percent is called as so-called " open bore porosity ") and the second cavity (it is mutually isolated and not therefore to be interconnected and the total porosity of its usual little number percent is called as so-called " lipostomous porosity ") sum.Therefore, in this case by using pottery to come to regulate factor of porosity within relevant body by selective combustion temperature.If the pottery that (just as in this example) will adopt has factor of porosity high as far as possible, then when manufacturing this pottery it is noted that temperature in combustion method for this reason used under any circumstance lower than, preferably far below temperature used when sintering.
" fabric " refers to one dimension, two dimension and/or three-dimensional structure, and it can exist with diversified embodiment, the wire one dimension textile structural that its chief component comprises fiber and is made up of fiber." fiber " referred to herein as flexible structure, and its length-to-diameter is at least 3:1, particularly at least 10:1, wherein, can occur the ratio of 100:1 on rare occasion, even 1000:1." flexibility " referred to herein as the particularly preferred characteristic of fabric in the present case, can change its shape and can return to its original-shape at least in part when cancelling acting force under power effect.Conventional fabrics is used mostly to the fiber be made up of organic material, the particularly special vegetable material provided for this reason, and so-called " ceramic fiber " comprises the fiber be made up of inorganic nonmetallic materials, it can have polycrystal or impalpable structure and it particularly can comprise oxidation material class such as aluminium oxide Al
2o
3or silicon oxide sio
2, or non-oxidating material class such as carbon C or silit SiC.The linear one dimension textile structural be made up of fiber particularly comprises " yarn " (structure be namely made up of one or more fiber), " line " (referring to the section of yarn) or " twisting thread " (it has multiple yarn of being intertwined and therefore has the fracture strength significantly increased).
Two-dimensional fabric comprises the textile structural of planar, and what belong to this particularly has braid, woven fabric, knitted fabric, knotwork, nonwoven fabrics or felt.If the textile material of planar only has limited length, then it is commonly called " band "." braid " is generally understood as the weaving planar structure be made up of at least two one-dimentional structures almost mutually intersected squarely, and by least two non-perpendicular angles the weaving planar structure that forms of the one dimension textile structural that intersects be called as " knotwork "." woven fabric " is also understood to braid, and it also forms mesh except the crossing at right angle of one dimension textile structural, and described mesh particularly causes the ductility of this structure and flexible raising.Mesh referred to herein as wire loop, and it stretches in other wire loops.Therefore, knitted fabric is interpreted as the planar structure of weaving, and in this weaving planar structure, the winding formed by means of line is wound in another winding.If use aciculiform ramify, then the planar structure obtained is commonly called " woven fabric ".Finally, " nonwoven fabrics " or " felt " is interpreted as following weaving planar structure, its majority is combined into by one dimension textile structural and it is otherwise interconnected as knotwork, braid, woven fabric and knitted fabric, particularly by machining, by application heat or pass through water treatment.When nonwoven fabrics or felt, the combination in planar textile structural adheres to realization certainly basically by one dimension textile structural, describedly usually significantly strengthens from being attached by above-mentioned processing mode.
Can manufacture a large amount of 3 D stereo textile structural (body structure) by above-mentioned and/or other one dimension and/or two-dimentional textile structural, it can be put in the medial compartment between shell body and inner housing according to the present invention.What belong to this particularly has flexible pipe, socks, straw mats or weaving semi-manufacture, but other configurations are also fine.
According to the present invention, described fabric has high flexibility and elasticity, and it allows described fabric to change its shape under power effect and can be returned to its original-shape at least in part after acting force is removed.High flexibility and elasticity are the bases that fabric can have sizable ductility sometimes.For this reason, term " ductility " refers to a kind of like this extension, and before reaching this extension, described fabric can extend when not rupturing or tearing." extension " is interpreted as fabric relative length increase under loads at this, and it also can be called as prolongation or stretch.Load is particularly present in the power of applying or comes from the change of ambient environmental conditions such as particularly temperature, and wherein, relative length increase also can be called as " heat expansion " in the case of the latter.In the present case, the ceramic fabric adopted has high ductility relative to the total length of this fabric, particularly at least 5%, preferably at least 10%, particularly preferably at least 25%.
In a particularly preferred configuration of the present invention, the ductility that described ceramic fabric has allows described ceramic fabric to be stretched on described inner housing.For this reason, described ceramic fabric so experiences extension, to such an extent as at least one dimension, experiences length increase and can be installed to thus on inner housing.After the unloading, described ceramic fabric is returned to its original-shape and preferable shape is retained on described inner housing in locking manner.For this reason, described inner housing preferably has a shape, the shape that particularly can axially keep described ceramic fabric to have by this shape.
In another preferred configuration, described inner housing has holding device, and described holding device is preferably formed with the form of outstanding projection.Described holding device is clamped on described holding device and/or between described holding device especially for by described ceramic fabric at this.Due to fabric, there is ductility and therefore because its structure can extend in short-term, therefore it can be installed on inner housing very simply in this way.Due to the flexibility of ceramic fabric, the three-dimensional woven structure of such as tube-shape can be taken out again tightly after being installed on inner housing, reduce the overall diameter of described ceramic fabric thus, thus described ceramic fabric just can be engaged on inner housing by this measure under many circumstances regularly.But, by the holding device of holding device, particularly convex form, additionally prevent described ceramic fabric from slippage described inner housing.
In another preferred configuration, be engaged in as well as possible on inner housing in order to ensure ceramic fabric, inner housing and ceramic fabric are made up of a kind of material respectively, make described inner housing on a temperature range, experience first when sensor device heating to expand, and described ceramic fabric experiences the second expansion on this temperature range, preferably this second expansion is no more than described first expansion, although thus described ceramic fabric has flexibility, but described ceramic fabric also can not loosen relative to described inner housing (ceramic fabric preferably clamps around this inner housing) when sensor device heating.Especially, when (just as such during such as lambda probe in a motor vehicle) sensor device experiences from room temperature to heating more than 600 DEG C, above-mentioned viewpoint is especially significant.
In a preferred configuration, described shell body can have at least one for described fluid media (medium), enter opening towards the medial compartment between shell body and inner housing.In addition, described inner housing can have at least one for described fluid media (medium), the entrance that comes from described medial compartment, described entrance allows fluid media (medium) to arrive sensor element from described medial compartment.Can form flow path in this configuration, described flow path can extend to described entrance via described medial compartment and can by described fluid media (medium) percolation from the described opening that enters.In this preferred configuration, at described ceramic fabric, (described ceramic fabric is so put in medial compartment, to such an extent as to it preferably abuts on inner housing) and described shell body between retain a space at least in part, described flow path extends on described ceramic fabric through described space is preferably like this at least in part, to such an extent as to described fluid media (medium) is not fully ceramic fabric described in percolation, but extend across ceramic fabric described in stream or overflow at least partly.In this way, make from the impact entering the ceramic fabric that opening to the flow path of the entrance in inner housing is not existed to a great extent for fluid media (medium) shell body.
In a special configuration, described ceramic fabric can so surround described inner housing at this, to such an extent as to it hides at least one entrance described at least in part.This configuration allows in the following manner, that is, concrete dynamic modulus ceramic fabric has hole, and the flow path for fluid media (medium) can pass described hole.But described hole is also arranged for, be suitable for particularly from described fluid media (medium), receiving liquid.In this way, described ceramic fabric also contributes to preventing the liquid in fluid media (medium) from arriving sensor element through described entrance thus may cause thermal shock there further.At this, the capillary effect particularly occurred based on the hole of described ceramic fabric that is separated entering into the liquid of the medial compartment between shell body with inner housing is carried out.When reaching dewpoint temperature, by evaporation, the liquid be stored in described ceramic fabric can be removed in this way, making described ceramic fabric thus in its liquid storage capacity again with regeneration.
Particularly, in order to reduce the danger of thermal shock, sensor element can be provided with ceramic coat, is particularly provided with thermal shock coating.But, because the part entering into the medial compartment between shell body and inner housing of liquid can deposit at ceramic fabric and be attached to here thus, therefore the reduction of liquid load can be carried out on the sensor element, allow the thermal mass reducing thermal shock coating thus, this allows sensor element to make quick response for the change in liquid medium.
In another preferred configuration, described protective housing extends to the end contrary with the exhaust gas side end of sensor device of this protective housing from the exhaust gas side end of sensor device.At this, a cavity can be retained in described exhaust gas side end with between described ceramic fabric and/or between described contrary end and described ceramic fabric in described medial compartment inside, described cavity provides not only for thermal expansion but also the space for vibrating, as they usually occur in engine exhaust gas system to described ceramic fabric.
Feature of the present invention is especially extending concrete dynamic modulus ceramic fabric at least one sensor element around sensor device to put in the medial compartment between the inner housing of protective housing and shell body, and the present invention has series of advantages.Extending ceramic fabric can be installed very simply and be fixed on inner housing due to its elasticity.Additionally, the holding device be placed on inner housing can prevent ceramic fabric from slippage inner housing in addition.
In addition, the advantage that the employing of extending ceramic fabric has is that this material is insensitive to a great extent for the vibration occurred in vehicle.Its reason is, flexible ceramic fabric can follow the vibration of the inner housing be positioned under it when significantly not limiting.In this way can be positioned on the inner housing under ceramic fabric prevent from rupturing in the life span of described extending ceramic fabric, tear, dislocation etc.
Another advantage of configuration of the present invention is, the flexibility of ceramic fabric can self-compensation situation when sensor device heating in the inner housing be usually made of metal and the different expansions that may occur between stupalith.In this way, inner housing with obtain best to a great extent cooperation between the extending concrete dynamic modulus ceramic fabric surrounding this inner housing all the time.The inner housing that the possible stress caused due to different heat expansion coefficient particularly can be avoided thus to cause and the damage of ceramic fabric.
The selected factor of porosity of described extending concrete dynamic modulus ceramic fabric allows a part for the liquid in the entered into inner housing in fluid media (medium) and the medial compartment between shell body to deposit in the hole of described ceramic fabric before this liquid arrives sensor element.Thus achieve the reduction of the liquid load on sensor element, this allows to arrange the less thermal mass of thermal shock protective finish and thus shortens response time of sensor element.
Accompanying drawing explanation
The preferred embodiments of the present invention are shown in the drawings and illustrate in detail in the following description.In the accompanying drawings:
Fig. 1 illustrates the preferred embodiment of sensor device of the present invention with cut-open view, and it has protective housing, and described protective housing comprises the ceramic component of an extending concrete dynamic modulus ceramic fabric form;
Fig. 2 illustrates the preferred embodiment of the extending concrete dynamic modulus ceramic fabric that can be applicable in the present invention;
Fig. 3 illustrates the schematic diagram be arranged on by extending concrete dynamic modulus ceramic fabric on the inner housing of protective housing.
Embodiment
The preferred embodiment of the sensor device 110 according at least one fluid properties for test fluid medium 112 of the present invention shown in Figure 1.Described sensor device 110 comprises the protective housing 114 for receiving at least one sensor element (not shown), and described sensor element is surrounded by described protective housing 114.
In the present embodiment; described protective housing 114 comprises shell body 116; described shell body so surrounds an inner housing 118 at least in part; to such an extent as between described shell body and this inner housing 118, form a medial compartment 120; according to the present invention, in described medial compartment 120, put into the ceramic component 122 of ductile concrete dynamic modulus ceramic fabric 124 form.In the embodiment shown in Fig. 1, described shell body 116 has at least one for what go to the fluid media (medium) 112 of described medial compartment 120 and enters opening 126, and described inner housing 118 has at least one for going to the entrance 128 of the fluid media (medium) 112 of at least one sensor element described from medial compartment 120.By this layout, forming one can by the flow path 130 of described fluid media (medium) 112 percolation, and described flow path arrives entrance 128 from entering opening 126 via medial compartment 120.In this way, a space 132 is retained at least in part between the ceramic component 122 abutted on inner housing 118 and shell body 116, wherein, this layout is formed like this, make described flow path 130 preferably fully need not pass described ceramic component 122, but described space 132 can be passed via described ceramic component 122 at least in part.
Exemplary embodiment for extending concrete dynamic modulus ceramic fabric 124 shown in Figure 2.In this embodiment, it is three-dimensional woven structure, and this three-dimensional woven structure is made up of the one dimension of hose form of weaving and/or two-dimentional textile structural.A part for this extending concrete dynamic modulus ceramic fabric 124 is particularly suitable for the embodiment shown in Fig. 3.
Fig. 3 illustrates a schematic diagram, can draw and be installed by extending concrete dynamic modulus ceramic fabric 124 and to be fixed on a method for optimizing substantially on cylindrical inner housing 118 from this schematic diagram.In order to implement this method for optimizing, described extending concrete dynamic modulus ceramic fabric 124 (it provides with the form of flexible pipe of weaving) first radially 134 temporarily so to be extended, to such an extent as to this extending concrete dynamic modulus ceramic fabric 124 is installed section 136 by one and is seated in simply on the tubular inner casing body 118 under it.After extending for described hose-like concrete dynamic modulus ceramic fabric 124 is installed on described cylindrical inner housing 118, described extending concrete dynamic modulus ceramic fabric 124 can be taken out tight because it is flexible in a loose sections 138, particularly can reduce its overall diameter thus.In this way, the precise match of described extending concrete dynamic modulus ceramic fabric 124 and described inner housing 118 is realized in this preferred embodiment.The additional holding device 140 be placed on inner housing 118 is configured to the convex form of giving prominence in this embodiment, and their effect forbids that described extending concrete dynamic modulus ceramic fabric 124 is from slippage described inner housing 118.Utilize the ceramic component 122 installed for the straightforward procedure of installing and fix described extending concrete dynamic modulus ceramic fabric 124 of the present invention when sensor device 110 heating for vibration with expand with heat and contract with cold all very insensitive.These favourable characteristics mainly come from flexibility and the concrete dynamic modulus of the ceramic component 122 for this reason adopted.
Claims (11)
1. sensor device (110), for test fluid medium (112), particularly at least one characteristic of engine exhaust gas, it comprises at least one for receiving the protective housing (114) of at least one sensor element, wherein, one inner housing (118) surrounds described sensor element, described inner housing (118) is surrounded by a shell body (116) at least in part, a medial compartment (120) is constructed between described inner housing (118) and described shell body (116), at least one ceramic component (122) is put in described medial compartment (20),
Be characterised in that, described ceramic component (122) exists with the form of extending concrete dynamic modulus ceramic fabric (124) at least in part.
2. the sensor device (110) according to a upper claim, is characterized in that, described ceramic fabric (124) has the ductility of at least 5%, preferably at least 10%, particularly preferably at least 25%.
3. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described ceramic fabric (124) is stretched on described inner housing (118).
4. the sensor device (110) according to a upper claim, is characterized in that, the form trait that described ceramic fabric (124) is had by described inner housing (118).
5. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described inner housing (118) has holding device (140), described holding device is preferably formed with the form of outstanding projection, wherein, described ceramic fabric (124) is stretched on described holding device (140) and/or between described holding device.
6. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described inner housing (118) experiences first and expands on a temperature range when sensor device (110) heating, wherein, described ceramic fabric (124) experiences second and expands on this temperature range, and this second expansion is no more than described first and expands.
7. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described shell body (116) have at least one for lead to described medial compartment (120) fluid media (medium) (112) enter opening (126), described inner housing (118) has at least one for coming from the entrance (128) of the fluid media (medium) (112) of described medial compartment (120), wherein, one can extend to described entrance (128) from the described opening (126) that enters via described medial compartment (120) by the flow path (130) of described flow media (112) percolation, wherein, a space (132) is retained at least in part between described ceramic fabric (124) and described shell body (116), described flow path (130) preferably extends via described ceramic fabric (124) at least in part through described space (132).
8. the sensor device (110) according to a upper claim, is characterized in that, described ceramic fabric (124) hides described entrance (128) at least in part.
9. according to sensor device in any one of the preceding claims wherein (110), it is characterized in that, described ceramic fabric (124) has hole, and described hole is configured to receive the liquid in liquid, particularly described fluid media (medium) (112).
10. according to sensor device in any one of the preceding claims wherein (110); it is characterized in that; described protective housing (114) extends to contrary end from exhaust gas side end; wherein, in described medial compartment (120), between described exhaust gas side end with described ceramic fabric (124) and/or between described contrary end and described ceramic fabric (124), a cavity is retained.
11., according to sensor device in any one of the preceding claims wherein (110), is characterized in that, described sensor element is provided with ceramic coat, is particularly provided with thermal shock coating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013221270.4 | 2013-10-21 | ||
| DE201310221270 DE102013221270A1 (en) | 2013-10-21 | 2013-10-21 | Sensor device for detecting at least one property of a fluid medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104569302A true CN104569302A (en) | 2015-04-29 |
| CN104569302B CN104569302B (en) | 2018-10-26 |
Family
ID=52775102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410557827.2A Expired - Fee Related CN104569302B (en) | 2013-10-21 | 2014-10-20 | Sensor device at least one characteristic for detecting fluid media (medium) |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN104569302B (en) |
| DE (1) | DE102013221270A1 (en) |
| ES (1) | ES2534341B1 (en) |
| FR (1) | FR3012221A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4437507C1 (en) * | 1994-10-20 | 1995-11-30 | Bosch Gmbh Robert | Sensor element resistant to thermal shock, e.g. vehicle exhaust gas sensor |
| CN1221109A (en) * | 1997-09-13 | 1999-06-30 | 三星电机株式会社 | Oxygen sensor |
| DE20004514U1 (en) * | 2000-03-10 | 2001-07-26 | Bosch Gmbh Robert | Electrochemical sensor |
| DE102007030795A1 (en) * | 2006-07-19 | 2008-01-24 | Robert Bosch Gmbh | Gas sensor for exhaust gas has at least one coating in form of textile or fleece for thermal insulation or liquid retention on at least one protective tube |
| CN101720425A (en) * | 2007-05-12 | 2010-06-02 | 马夸特有限责任公司 | Sensor with a double housing |
| CN101865875A (en) * | 2009-04-16 | 2010-10-20 | 日本特殊陶业株式会社 | Gas sensor |
| EP2554984A1 (en) * | 2011-08-03 | 2013-02-06 | Robert Bosch Gmbh | Gas sensor with thermal shock protection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3629786B2 (en) * | 1995-01-19 | 2005-03-16 | 株式会社デンソー | Oxygen concentration detector |
| US5762771A (en) * | 1996-02-06 | 1998-06-09 | Denso Corporation | Air-fuel ratio sensor |
| DE102005053136A1 (en) * | 2005-11-08 | 2007-05-10 | Robert Bosch Gmbh | Exhaust gas sensor has flat particle filter that can rotate in holder with mechanically activated particle removal using striking or oscillating |
| DE102008000463A1 (en) * | 2008-02-29 | 2009-09-03 | Robert Bosch Gmbh | exhaust gas sensor |
-
2013
- 2013-10-21 DE DE201310221270 patent/DE102013221270A1/en not_active Withdrawn
-
2014
- 2014-08-18 ES ES201431229A patent/ES2534341B1/en not_active Expired - Fee Related
- 2014-10-17 FR FR1459989A patent/FR3012221A1/en not_active Withdrawn
- 2014-10-20 CN CN201410557827.2A patent/CN104569302B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4437507C1 (en) * | 1994-10-20 | 1995-11-30 | Bosch Gmbh Robert | Sensor element resistant to thermal shock, e.g. vehicle exhaust gas sensor |
| CN1221109A (en) * | 1997-09-13 | 1999-06-30 | 三星电机株式会社 | Oxygen sensor |
| DE20004514U1 (en) * | 2000-03-10 | 2001-07-26 | Bosch Gmbh Robert | Electrochemical sensor |
| DE102007030795A1 (en) * | 2006-07-19 | 2008-01-24 | Robert Bosch Gmbh | Gas sensor for exhaust gas has at least one coating in form of textile or fleece for thermal insulation or liquid retention on at least one protective tube |
| CN101720425A (en) * | 2007-05-12 | 2010-06-02 | 马夸特有限责任公司 | Sensor with a double housing |
| CN101865875A (en) * | 2009-04-16 | 2010-10-20 | 日本特殊陶业株式会社 | Gas sensor |
| EP2554984A1 (en) * | 2011-08-03 | 2013-02-06 | Robert Bosch Gmbh | Gas sensor with thermal shock protection |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013221270A1 (en) | 2015-04-23 |
| ES2534341R1 (en) | 2016-02-23 |
| FR3012221A1 (en) | 2015-04-24 |
| CN104569302B (en) | 2018-10-26 |
| ES2534341B1 (en) | 2016-12-15 |
| ES2534341A2 (en) | 2015-04-21 |
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