CN218865829U - Nitrogen oxygen sensor and have its vehicle - Google Patents
Nitrogen oxygen sensor and have its vehicle Download PDFInfo
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- CN218865829U CN218865829U CN202222931594.0U CN202222931594U CN218865829U CN 218865829 U CN218865829 U CN 218865829U CN 202222931594 U CN202222931594 U CN 202222931594U CN 218865829 U CN218865829 U CN 218865829U
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- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 83
- 239000007789 gas Substances 0.000 claims abstract description 29
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 29
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910001887 tin oxide Inorganic materials 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 33
- 229910000428 cobalt oxide Inorganic materials 0.000 claims description 22
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 22
- 238000002203 pretreatment Methods 0.000 claims description 9
- 229910018885 Pt—Au Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical class ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 claims 4
- 238000005259 measurement Methods 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 description 23
- 229910052760 oxygen Inorganic materials 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The utility model discloses a nitrogen oxygen sensor and have its vehicle, nitrogen oxygen sensor includes: the solid electrolyte is internally provided with a pretreatment chamber, a first chamber and a second chamber which are communicated in sequence along the gas flowing direction, and a common electrode is arranged outside the solid electrolyte; wherein, at least part of the inner peripheral wall of the pretreatment chamber is provided with tin oxide particles; a first pump electrode is arranged in the first chamber; a second pump electrode is arranged in the second chamber and is used for detectingAnd a detector for measuring the potential difference between the second pump electrode and the common electrode. The utility model relates to a nitrogen oxygen sensor can avoid H in the tail gas 2 For NO in tail gas x The influence of the true value of the nitrogen oxygen sensor improves the measurement precision of the nitrogen oxygen sensor to be closer to NO x The true value of the emission amount.
Description
Technical Field
The utility model belongs to the technical field of the vehicle technique and specifically relates to a nitrogen oxygen sensor and have its vehicle is related to.
Background
Nitrogen oxygen transport in the related artThe sensor comprises a pre-treatment chamber in which HC and CO in the exhaust gases of the vehicle are consumed and a first chamber into which only NO remains in the exhaust gases when they enter x ，NO x The NO in the gas is catalyzed into nitrogen and oxygen, and the nitrogen and the oxygen flow between the electrodes form an oxygen flow voltage which represents the discharge amount of the NO. However, when the tail gas contains H 2 While robbing O on the first pump electrode 2 Reacts therewith to result in O in the first chamber 2 Is distorted, thereby affecting the subsequent NO x The true measurement value of (a). The present application is directed to a nitrogen oxide sensor to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model discloses an aim at provides a nitrogen oxygen sensor. The utility model relates to a nitrogen oxygen sensor can avoid H in the tail gas 2 To O is 2 The influence of content detection improves the measurement precision of the nitrogen-oxygen sensor, so that the nitrogen-oxygen sensor is closer to NO x The true value of the emission amount.
The utility model also provides a vehicle of having aforementioned nitrogen oxygen sensor.
According to some embodiments of the present invention, the nitrogen-oxygen sensor comprises a solid electrolyte, the solid electrolyte is provided with a pretreatment chamber, a first chamber and a second chamber in sequence along a gas flow direction, and a common electrode is disposed outside the solid electrolyte; wherein, at least part of the inner peripheral wall of the pretreatment chamber is provided with tin oxide particles; a first pump electrode is arranged in the first chamber; and a second pump electrode and a detector for detecting the potential difference between the second pump electrode and the common electrode are arranged in the second chamber.
The utility model relates to a nitrogen oxygen sensor is provided with the preliminary treatment cavity in the solid electrolyte, contains H in vehicle exhaust 2 、HC、CO、NO x In the process, the tin oxide particles in the pretreatment cavity can adsorb H in the tail gas 2 And CO, preventing H 2 O entering the first chamber to rob the first pump electrode 2 Thereby affecting the subsequent measurement precisionDegree of NO measured by a nitrogen oxygen sensor x The amount of emissions of (a) is closer to the true value.
According to some embodiments of the invention, at least part of the inner circumferential wall of the pre-treatment chamber is further provided with Pd particles.
According to some embodiments of the invention, at least part of the inner circumferential wall of the pre-treatment chamber is further provided with cobalt oxide particles.
According to some embodiments of the invention, at least part of the inner circumferential wall of the pretreatment chamber is provided with the cobalt oxide particles, the tin oxide particles, the Pd particles and the cobalt oxide particles are evenly distributed.
According to some embodiments of the invention, the first pump electrode the common electrode is connected with the power supply respectively to form a first connection circuit.
According to some embodiments of the invention, the second pump electrode the common electrode is connected with the power supply respectively to form a second communication circuit.
According to some embodiments of the utility model, the inside one end of keeping away from of solid electrolyte the preliminary treatment cavity is provided with the air chamber, be provided with first electrode in the air chamber, be provided with the second electrode in the second cavity, first electrode with the second electrode is electric to be linked to each other.
According to some embodiments of the invention, the first pump electrode is configured as a Pt-Au composite electrode formed of Pt particles and Au particles.
According to some embodiments of the invention, the Pt particles and the Au particles are uniformly arranged on the solid electrolyte.
In another aspect of the present invention, a vehicle is provided, including the aforementioned nitrogen oxide sensor. Thus, the vehicle has all of the features and advantages of the aforementioned NOx sensor, which will not be described herein. In general, at least NO x And the emission quantity is measured more accurately.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a nitrogen oxide sensor according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a related art NOx sensor;
fig. 3 is a schematic diagram of a process of pumping oxygen from the first pumping electrode to the first chamber according to an embodiment of the present invention.
Reference numerals:
1000: a nitrogen-oxygen sensor; 1100: a solid electrolyte; 100: a pre-processing chamber; 200: a first chamber; 300: a second chamber; 400: an air chamber; 110: tin oxide particles; 120: pd particles; 130: cobalt oxide particles; 1200: a first pump electrode; 1300: a second pump electrode; 1400: a common electrode; 1500: a first electrode; 1600: a second electrode.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
A nitrogen oxide sensor 1000 according to an embodiment of the present invention is described below with reference to fig. 1 to 3.
In an aspect of the present invention, a nitrogen oxide sensor 1000 is provided, and referring to fig. 1, the nitrogen oxide sensor 1000 includes: the solid electrolyte 1100 is internally provided with a pretreatment chamber 100, a first chamber 200 and a second chamber 300 which are communicated in sequence along the gas circulation direction, and a common electrode 1400 is arranged outside the solid electrolyte 1100, namely, vehicle tail gas flows through the pretreatment chamber 100, the first chamber 200 and the second chamber 300 in sequence; wherein at least a portion of the inner peripheral wall of the pre-treatment chamber 100 is disposed thereonWith adsorption of CO and H 2 And at least one of HC and HC, a first pump electrode 1200 catalyzing a reaction of at least one of HC and CO is disposed in the first chamber 200, and NO is catalyzed in the second chamber 300 x The second pump electrode 1300 that reacts and the detector (not shown) that detects the potential difference between the second pump electrode 1300 and the common electrode 1400, the first pump electrode 1200 and the second pump electrode 1300 may be Pt electrodes, and when the electrodes are energized, HC and CO can be oxidized, and NO can be reduced.
The solid electrolyte 1100 of the related art nox sensor 1000 has only the first chamber 200 and the second chamber 300 (refer to fig. 2) disposed therein, the common electrode 1400 is disposed outside the solid electrolyte 1100, the first pump electrode 1200 is disposed in the first chamber 200 to catalyze the HC and CO reaction, and the second pump electrode 1300 is disposed in the second chamber 300 to catalyze the NO reaction x Reaction, NO x After decomposition, O is produced 2 A potential difference is generated between the second pump electrode 1300 and the common electrode 1400, and the discharge amount of NO can be obtained by calculation based on the potential difference. However, when the tail gas contains H 2 When H is present 2 Entering the first chamber 200 robs O on the first pump electrode 1200 2 O in the first chamber 200 2 The content is decreased, and the first pump electrode 1200 pumps O to the first chamber 200 2 Pump O 2 In the process of (1), will be O 2 Escape to the second chamber 300 to make O in the second chamber 300 2 Instead of all being generated by NO decomposition, the potential difference between the second pump electrode 1300 and the common electrode 1400 cannot represent the decomposition amount of NO, and thus the measurement accuracy of the nox sensor 1000 is affected. In the nitrogen-oxygen sensor 1000 according to the present invention, three chambers are disposed in the solid electrolyte 1100, the tail gas first reaches the pretreatment chamber 100 containing the tin oxide particles 110 for pretreatment, and the tin oxide particles 110 in the pretreatment chamber 100 can adsorb H in the tail gas 2 And CO, preventing H 2 O into the first chamber 200 and onto the first pump electrode 1200 2 Reaction, affecting the measurement of the potential difference, O in the second chamber 300 2 All generated by NO decomposition, and the discharge amount of NO can be obtained according to the potential difference measured by the detector and an empirical formulaAnd the accuracy of the nitrogen oxide sensor 1000 in measuring the NO emission is ensured.
The type of the detector is not particularly limited, and may be a voltmeter, a voltage sensor, or the like.
The specific reactions of the exhaust gas in the pretreatment chamber 100, the first chamber 200, and the second chamber 300 will be described in detail below:
according to some embodiments of the present disclosure, the tin oxide particles 110 may also promote H to some extent 2 And CO, the following reactions occur: 2CO 2H 2 →CO 2 +CH 4 、CO+HC+ 5 / 2 H 2 →C 2 H 5 OH to consume H in the pre-processing chamber 100 2 。
H in the tail gas 2 Is pre-treated and enters the first chamber 200, where the main components of the exhaust gas are HC, CO and O 2 And a first pump electrode 1200 is arranged in the first chamber 200, when the engine is in a lean combustion stage (air-fuel ratio is more than 14.3) 2 The following reactions occur: CO + C 1 / 2 O 2 →CO 2 、HC+O 2 →H 2 O+CO 2 At the same time, because of the O in the first chamber 200 during the lean burn phase 2 Higher content of first pump electrode 1200 may be O 2 Providing electrons, the following reaction occurs: o is 2 +4e→2O 2- ，O 2- The Pt particles constituting the common electrode 1400 can take O away by oxygen vacancies in the solid electrolyte 1100 rapidly migrating to the common electrode 1400 outside the solid electrolyte 1100 2- The following reaction occurs: 2O of 2- -4e→O 2 I.e. the O inside the first chamber 200 2 Migration to the outside of the first chamber 200 to avoid O in the first chamber 200 2 The content of the oxygen gas escapes to the second chamber 300 to cause the O in the second chamber 300 2 The content increases, affecting the measurement of the potential difference.
According to some embodiments of the present invention, referring to fig. 1, the outside of the solid electrolyte 1100 is provided with the common electrode 1400, the first pump electrode 1200, and the common electrode 1400 are respectively connected with a power supply to form a first connecting circuit. When the engine is in the rich phase (air/fuel ratio < 14.3) 2 . Specifically, the first pump electrode 1200 is connected to the positive power supply, and the common electrode 1400 is connected to the negative power supply, such that O of the common electrode 1400 2 To obtain electrons as O 2- Is moved towards the first pump electrode 1200, O 2- Losing electrons to O at the first pump electrode 1200 2 For replenishing O in the first chamber 200 2 CO and HC with O in the first chamber 200 2 The reaction was carried out sufficiently.
Specifically, referring to fig. 3, region a corresponds to the outside of the first chamber 200, region B corresponds to the inside of the first chamber 200, and O of the common electrode 1400 when the engine is in the rich phase 2 The following reactions take place for the electrons obtained: o is 2 +4e→2O 2- I.e. O outside the solid electrolyte 1100 2 Oxygen vacancies through the solid electrolyte 1100 migrate to the interior of the first chamber 200, O 2- The following reaction occurs under catalysis of the first pump electrode 1200: 2O of 2- -4e→O 2 Further supplementing the first chamber 200 with O 2 (ii) a When the engine is in a lean stage, the first pump electrode 1200 may be O 2 Providing electrons, and carrying out the following reaction: o is 2 +4e→2O 2- ，O 2- The Pt particles constituting the common electrode 1400 can take away O by oxygen vacancies in the solid electrolyte 1100, rapidly migrating to the common electrode 1400 outside the solid electrolyte 1100 2- The following reaction occurs: 2O 2- -4e→O 2 I.e. the O inside the first chamber 200 2 Migrate to the exterior of the first chamber 200.
According to some embodiments of the present invention, referring to fig. 1, the second pump electrode 1300 and the common electrode 1400 are respectively connected to a power source to form a second connection circuit. Specifically, the second pump electrode 1300 is connected to the negative electrode of the power supply, and after the tail gas processed by the first chamber 200 enters the second chamber 300, only NO remains in the tail gas x NO at this time x In the presence of both NO and NO 2 NO is easily absorbed by the second pump electrode 130 in the second chamber 3000 catalysis, the following reaction takes place: 2NO → N 2 +O 2 NO in exhaust gas 2 Substantially free of catalysis by the second pump electrode 1300, and NO is catalyzed to produce O 2 The formed potential difference can calculate the content of NO, and in the case of diesel engine, the discharged tail gas NO x More than 90% of the discharge amount of NO is NO, so the discharge amount of NO can be obtained through the potential difference measured by the potential difference monitor and an empirical formula.
According to some embodiments of the present invention, referring to fig. 1, the end of the solid electrolyte 1100 away from the pretreatment chamber 100 is provided with an air chamber 400, a first electrode 1500 is provided in the air chamber 400, a second electrode 1600 is provided in the second chamber 300, and the first electrode 1500 and the second electrode 1600 are electrically connected. Specifically, the air cavity 400 contains a certain amount of O 2 The voltage signal generated by connecting the first electrode 1500 and the second electrode 1600 can be used to determine whether the NOx sensor 1000 is malfunctioning.
According to some embodiments of the present invention, referring to fig. 1, to further prevent H adsorption by tin oxide particles 110 2 And O 2 The reaction can be performed, and the Pd particles 120 can be disposed on at least a portion of the inner peripheral wall of the pre-treatment chamber 100, so that the CO and H can be reduced when the Pd particles 120 are disposed in the pre-treatment chamber 100 2 The temperature at which the reaction takes place promotes adsorption of CO and H by the tin oxide particles 110 2 The reaction takes place at a lower temperature, consuming H 2 Thereby further preventing H 2 And entering the first chamber 200 to improve the measurement accuracy of the nitrogen-oxygen sensor 1000.
According to other specific embodiments of the present invention, with reference to fig. 1, in order to make H 2 When the pretreatment chamber 100 is completely consumed, cobalt oxide particles 130 may be further disposed on at least a portion of the inner peripheral wall of the pretreatment chamber 100, the cobalt oxide particles 130 may efficiently capture CO, and when the pretreatment chamber 100 contains the tin oxide particles 110, the Pd particles 120, and the cobalt oxide particles 130, the tin oxide particles 110 preferentially adsorb CO and H in the exhaust gas 2 The cobalt oxide particles 130 can efficiently capture CO in the tail gas, and the Pd particles 120 can reduce CO and H 2 The reaction temperature is equivalent to that CO is supplemented, and CO and H can be reacted 2 ToShould be performed at a lower temperature, thereby pretreating the H in the chamber 100 2 Is completely consumed to avoid entering the first chamber 200 and O 2 The reaction takes place. Thereby, the measurement accuracy of the nitrogen oxygen sensor 1000 can be improved.
It should be noted that when the exhaust gas of the vehicle does not contain H 2 When the CO adsorbed by the cobalt oxide particles 130 is reacted with O by the Pd particles 120 2 The following reactions occur: 1 / 2 O 2 +CO→CO 2 although CO consumes some O 2 After the tail gas enters the first chamber 200, because the CO content is also reduced correspondingly, the tail gas entering the first chamber 200 consumes O 2 Is correspondingly reduced, CO entering the first chamber 200 and not adsorbed by the cobalt oxide particles 130 does not react with O on the first pumping electrode 1200 of the first chamber 200 2 The reaction occurs, and therefore, the measurement accuracy of the nitrogen oxide sensor 1000 is not affected.
According to some embodiments of the present invention, the arrangement of the tin oxide particles 110, the Pd particles 120, and the cobalt oxide particles 130 in the pretreatment chamber 100 is not particularly limited, and one skilled in the art can arrange the tin oxide particles 110, the Pd particles 120, and the cobalt oxide particles 130 uniformly in the pretreatment chamber 100 according to actual needs. Further, the tin oxide particles 110, the Pd particles 120, and the cobalt oxide particles 130 may be arranged by: the tin oxide particles 110 and the Pd particles 120 are arranged in a staggered manner; and/or the tin oxide particles 110 and the cobalt oxide particles 130 are staggered; and/or the Pd particles 120 are staggered with the cobalt oxide particles 130. Still further, the tin oxide particles 110, the Pd particles 120, and the cobalt oxide particles 130 are arranged in a staggered manner with respect to each other. Thereby fully contacting the tail gas and improving the CO and H 2 Increase the adsorption effect of H 2 The consumption rate of the nitrogen-oxygen sensor 1000 is more approximate to the real value, and the measurement accuracy is improved.
According to some embodiments of the present invention, the specific locations of the tin oxide particles 110, the Pd particles 120, and the cobalt oxide particles 130 in the pretreatment chamber 100 are not particularly limited. For example, the tin oxide particles 110, the Pd particles 120, and the cobalt oxide particles 130 may be disposed only on a portion of the inner wall of the pretreatment chamber 100; or the tin oxide particles 110, the Pd particles 120, and the cobalt oxide particles 130 are disposed on the entire inner wall of the first chamber 200.
According to some embodiments of the present disclosure, the first pump electrode 1200 may also be a Pt-Au composite electrode formed by Pt particles and Au particles, since the capturing ability of Au to HC and CO is much greater than that to NO x After at least one of CO and HC is captured by Au, the captured substance can be oxidized by Pt particles to prevent NO x Is catalytically decomposed within the first chamber 200, improving the accuracy of the final nitrogen oxide measurement.
Specifically, the Pt particles and the Au particles can be uniformly distributed on the solid electrolyte 1100, and specifically, the Pt particles and the Au particles can be staggered on the solid electrolyte 1100, so that the Pt particles and the Au particles are sufficiently matched, catalytic oxidation is performed while capturing, the oxidizing ability of the first pump electrode 1200 is improved, and NO is further reduced x The consumption in the first chamber 200 improves the accuracy of the detection by the nitrogen oxide sensor 1000.
In another aspect of the present invention, a vehicle is provided, which includes the aforementioned nox sensor 1000. Thus, the vehicle has all of the features and advantages of the NOx sensor 1000 described above, and thus, will not be described herein. In general, at least NO x And the discharge quantity is measured more accurately.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A nitrogen-oxygen sensor, comprising: the solid electrolyte (1100), a pretreatment chamber (100), a first chamber (200) and a second chamber (300) which are communicated with each other are sequentially arranged in the solid electrolyte (1100) along the gas flow direction, and a common electrode (1400) is arranged outside the solid electrolyte (1100); wherein,
tin oxide particles (110) are arranged on at least part of the inner peripheral wall of the pretreatment chamber (100);
a first pump electrode (1200) is disposed within the first chamber (200);
a second pump electrode (1300) and a detector for detecting a potential difference between the second pump electrode (1300) and the common electrode (1400) are arranged in the second chamber (300).
2. The nitroxide sensor of claim 1, characterized in that at least part of the inner circumferential wall of the pre-treatment chamber (100) is further provided with Pd particles (120).
3. The nitroxide sensor of claim 1 or 2, characterized in that at least part of the inner circumferential wall of the pre-treatment chamber (100) is further provided with cobalt oxide particles (130).
4. The nox sensor according to claim 2, characterized in that at least part of the inner circumferential wall of the pre-treatment chamber (100) is provided with cobalt oxide particles (130), and the cobalt oxide particles (130), the tin oxide particles (110) and the Pd particles are uniformly arranged.
5. The NOx sensor of claim 1, wherein the first pump electrode (1200) and the common electrode (1400) are connected to a power source to form a first connection circuit.
6. The NOx sensor of claim 5, wherein the second pump electrode (1300) and the common electrode (1400) are respectively connected to the power source to form a second communication circuit.
7. The nitroxide sensor of claim 6, wherein an air chamber (400) is disposed at an end of the solid electrolyte (1100) away from the pretreatment chamber (100), wherein a first electrode (1500) is disposed in the air chamber (400), and a second electrode (1600) is disposed in the second chamber (300), wherein the first electrode (1500) and the second electrode (1600) are electrically connected.
8. The nitroxide sensor of claim 1, wherein the first pump electrode (1200) is configured as a Pt-Au composite electrode formed of Pt particles and Au particles.
9. The nitrogen-oxygen sensor of claim 8, wherein the Pt particles and the Au particles are uniformly arranged on the solid electrolyte (1100).
10. A vehicle characterized by comprising the nitrogen oxide sensor according to any one of claims 1 to 9.
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| CN202222931594.0U CN218865829U (en) | 2022-11-03 | 2022-11-03 | Nitrogen oxygen sensor and have its vehicle |
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| CN202222931594.0U CN218865829U (en) | 2022-11-03 | 2022-11-03 | Nitrogen oxygen sensor and have its vehicle |
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