CN209673709U - A kind of non-heated type chip oxygen sensor of two lines - Google Patents
A kind of non-heated type chip oxygen sensor of two lines Download PDFInfo
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- CN209673709U CN209673709U CN201920356417.XU CN201920356417U CN209673709U CN 209673709 U CN209673709 U CN 209673709U CN 201920356417 U CN201920356417 U CN 201920356417U CN 209673709 U CN209673709 U CN 209673709U
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- lambda sensor
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Abstract
The utility model discloses a kind of non-heated type chip oxygen sensors of two lines, including reference electrode channel, first can this special battery and second can this special battery, the two sides of the reference electrode channel be respectively arranged with first can this special battery and described second can this special battery.The utility model has the advantages that two line lambda sensors of the area ratio conventional design that the lambda sensor and air, tail gas contact double, the internal resistance of lambda sensor can be reduced, reach the operating temperature for reducing lambda sensor, light-off time can be reduced simultaneously, guarantee that lambda sensor can rapidly enter working condition, it is up to standard to be conducive to exhaust emissions；The design of the lambda sensor can guarantee that there is this special battery of energy in tail gas discharge direction side, platinum electrode and zirconia base can be made to have higher operating temperature in this way；For the conversion zone of the design requirement sensing element of the lambda sensor completely into exhaust pipe, its object is to zirconia bases to be sufficiently heated, and not needing conducting self-heating can also work.
Description
Technical field
The utility model relates to lambda sensor technical fields, it particularly relates to which a kind of non-heated matrix formula oxygen of two lines passes
Sensor.
Background technique
Since in the recent period, motor vehicle exhaust emission causes considerable influence to environment, and the new car to dispatch from the factory now is three
An automotive oxygen sensor can be all installed before and after first catalyst, some vehicles are even more.Domestic and international a variety of models use at present
Lambda sensor is largely chip zirconium oxide formula lambda sensor.Because there is chip oxygen sensor tubular oxygen sensor not have
Series of advantages: such as structure is simple, easy to form, fast response time, size are small, develops chip oxygen sensor and meets market
Demand.Tubular oxygen sensor currently used in the market is gradually replaced chip oxygen sensor.
The structure of common two lines lambda sensor only has porous protective layer, catalysis external electrode, zirconia base, electricity in catalysis
Pole and two groups of reference electrode channel this six layer structures, common two lines lambda sensor generate oxygen sensor signal and need following item
Part: 1, hot conditions (zirconium oxide becomes ionic electrolytes, and oxonium ion can migrate)；2, (catalytic action promotes oxygen to platinum electrode
The generation of ion)；3, difference in oxygen concentration (difference in oxygen concentration of zirconia base two sides air and tail gas), common two lines lambda sensor exist
It is heated when use, so that common two lines lambda sensor is difficult to rapidly enter working condition, and then is unfavorable for tail
The emission compliance of gas.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Summary of the invention
For the problems in the relevant technologies, the utility model proposes a kind of non-heated type chip oxygen sensor of two lines, with gram
Take above-mentioned technical problem present in existing the relevant technologies.
For this purpose, the specific technical solution that the utility model uses is as follows:
A kind of non-heated type chip oxygen sensor of two lines, including this special battery of reference electrode channel, the first energy and the second energy
This special battery, wherein the two sides of the reference electrode channel are respectively arranged with first can this special battery and described this spy of second energy
Battery.
Further, this special battery of first energy includes being successively set on the reference electrode channel top from bottom to up
First be catalyzed in electrode, the first zirconia base, the first catalysis external electrode and the first porous protective layer.
Further, described second can this special battery include being successively set on the reference electrode channel bottom end under upper
Second be catalyzed in electrode, the second zirconia base, the second catalysis external electrode and the second porous protective layer.
Further, it offers on the reference electrode channel and is catalyzed in interior electrode and second catalysis with described first
The hole slot that electrode matches.
Further, it is described first be catalyzed in electrode and it is described first catalysis external electrode, it is described second be catalyzed in electrode and
The second catalysis external electrode is platinum material.
The utility model has the following beneficial effects:
(1), two line lambda sensors of the area ratio conventional design that the lambda sensor and air, tail gas contact double
(increases by second and be catalyzed interior electrode, the second zirconia base, the second catalysis external electrode and the second porous protective layer, one side is reacted
Become two sides reaction), the internal resistance of lambda sensor can be reduced, reaches the operating temperature for reducing lambda sensor, while can reduce
Light-off time guarantees that lambda sensor can rapidly enter working condition, it is up to standard to be conducive to exhaust emissions.
(2), the design of the lambda sensor can guarantee tail gas discharge direction side have can this special battery, in this way can be with
So that platinum electrode and zirconia base is had higher operating temperature (zirconia base leans on the tail gas of burning to conduct heat entirely).
(3), the conversion zone (can this special battery) of the design requirement sensing element of the lambda sensor is completely into exhaust pipe,
Its object is to zirconia bases to be sufficiently heated, and not needing conducting self-heating can also work.
(4), the non-heated two line lambda sensor of type can also reach four line hot type oxygen biography it is advantageous that not needing heating
The performance of sensor, then the temperature of the lambda sensor is entirely derived from the heat of tail gas.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram according to the non-heated type chip oxygen sensor of two line of one kind of the utility model embodiment.
In figure:
1, reference electrode channel；2, this special battery of the first energy；201, first it is catalyzed interior electrode；202, the first oxidation zirconium base
Body；203, the first catalysis external electrode；204, the first porous protective layer；3, this special battery of the second energy；301, second it is catalyzed interior electrode；
302, the second zirconia base；303, the second catalysis external electrode；304, the second porous protective layer.
Specific embodiment
To further illustrate each embodiment, the utility model is provided with attached drawing, these attached drawings are in the utility model discloses
A part of appearance mainly to illustrate embodiment, and can cooperate the associated description of specification former come the running for explaining embodiment
Reason, cooperation refer to these contents, and those of ordinary skill in the art will be understood that other possible embodiments and this is practical new
The advantages of type, the component in figure is not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Embodiment according to the present utility model provides a kind of non-heated type chip oxygen sensor of two lines.
Now in conjunction with the drawings and specific embodiments, the present invention will be further described, as shown in Figure 1, practical new according to this
The non-heated type chip oxygen sensor of two lines of type embodiment, including reference electrode channel 1, first can this special battery 2 and the second energy
This special battery 3, wherein the two sides of the reference electrode channel 1 are respectively arranged with this spy's battery 2 of the first energy and described second and can this
Special battery 3.
With the aid of the technical scheme, two line oxygen of the area ratio conventional design that the lambda sensor and air, tail gas contact
Sensor doubles, and can reduce the internal resistance of lambda sensor, reaches the operating temperature for reducing lambda sensor, while can reduce
Light-off time guarantees that lambda sensor can rapidly enter working condition, it is up to standard to be conducive to exhaust emissions.
In one embodiment, for above-mentioned first can for this special battery 2, described first can this special battery 2 include from
Under it is supreme be successively set on the first of 1 top of reference electrode channel be catalyzed in electrode 201, the first zirconia base 202, the
One catalysis external electrode 203 and the first porous protective layer 204.
In one embodiment, for above-mentioned second can for this special battery 3, described second can this special battery 3 include from
Be successively set under upper the second of 1 bottom end of reference electrode channel be catalyzed in electrode 301, the second zirconia base 302, the
Two catalysis external electrodes 303 and the second porous protective layer 304.
In one embodiment, for above-mentioned reference electrode channel 1, offered on the reference electrode channel 1 with
Described first is catalyzed the hole slot that electrode 301 matches in interior electrode 201 and second catalysis.
In one embodiment, in above-mentioned first is catalyzed for electrode 201, described first be catalyzed in electrode 201 with
Electrode 301 and the second catalysis external electrode 303 are platinum material in the first catalysis external electrode 203, second catalysis
Matter.
Working principle: the working principle and dry cell phase of the non-heated type chip oxygen sensor of two lines provided by the utility model
Seemingly, the oxidation zr element in sensor plays similar electrolyte.Its basic functional principle is: (high temperature under certain condition
And platinum catalysis), using the difference in oxygen concentration inside and outside zirconium oxide, potential difference is generated, and concentration difference is bigger, potential difference is bigger.Greatly
The content of oxygen is 21% in gas, and the exhaust gas after rich mixture burning is not actually oxygen-containing, the exhaust gas that is generated after lean combustion or
Contain more oxygen in the exhaust gas generated by misfire, but still than the oxygen much less in atmosphere.
Under the catalysis of high temperature and platinum, electronegative oxonium ion is adsorbed on the surfaces externally and internally of Zirconia ferrule.Due to big
Oxygen in gas is more than the oxygen in exhaust gas, and side is communicated with atmosphere on casing than exhaust gas side and adsorbs more anions, and two
The concentration difference of side ion generates electromotive force.When the oxygen concentration of casing exhaust gas side is low, a high voltage is generated between the electrodes
(0.6-1V).
First catalysis external electrode 203 and the second catalysis external electrode 303 are linked together by printing technology becomes this spy of energy
External electrode, contact is tail gas；First, which is catalyzed interior electrode 201 and second, is catalyzed interior electrode 301 and is connected by printing technology
Being connected together becomes energy Si Tenei electrode, and contact is atmosphere.
In conclusion by means of the above-mentioned technical proposal of the utility model, the face of the lambda sensor and air, tail gas contact
Product double than two line lambda sensors of conventional design (increase by second be catalyzed in electrode 301, the second zirconia base 302, the
One side reaction is become two sides reaction by two catalysis external electrodes 303 and the second porous protective layer 304), lambda sensor can be reduced
Internal resistance reaches the operating temperature for reducing lambda sensor, while can reduce light-off time, guarantees that lambda sensor can rapidly enter
It is up to standard to be conducive to exhaust emissions for working condition.The design of the lambda sensor can guarantee that tail gas discharge direction side is that have this
Special battery, platinum electrode and zirconia base can be made to have higher operating temperature in this way, and (zirconia base leans on the tail of burning entirely
Gas heat transfer).The conversion zone (this special battery of energy) of the design requirement sensing element of the lambda sensor is completely into exhaust pipe, mesh
Be that zirconia base can be sufficiently heated, not needing conducting self-heating can also work.Non-heated two line oxygen of the type sensing
Device can also reach the performance of four line heating type oxygen sensors it is advantageous that not needing heating, then the temperature of the lambda sensor is complete
The full heat for deriving from tail gas.
In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " Gu
Calmly ", the terms such as " being screwed on " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；
It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly, for this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (5)
1. a kind of non-heated type chip oxygen sensor of two lines, which is characterized in that including reference electrode channel (1), first can this be special
Battery (2) and second can this special battery (3), wherein the two sides of the reference electrode channel (1) are respectively arranged with first can this be special
Battery (2) and described second can this special battery (3).
2. the non-heated type chip oxygen sensor of a kind of two line according to claim 1, which is characterized in that described first can this
Special battery (2) include be successively set on from bottom to up the reference electrode channel (1) top first be catalyzed in electrode (201),
First zirconia base (202), the first catalysis external electrode (203) and the first porous protective layer (204).
3. the non-heated type chip oxygen sensor of a kind of two line according to claim 2, which is characterized in that described second can this
Special battery (3) include be successively set under upper the second of the reference electrode channel (1) bottom end be catalyzed in electrode (301),
Second zirconia base (302), the second catalysis external electrode (303) and the second porous protective layer (304).
4. the non-heated type chip oxygen sensor of a kind of two line according to claim 3, which is characterized in that the reference electrode
It is offered on channel (1) and is catalyzed the hole that electrode (301) matches in interior electrode (201) and second catalysis with described first
Slot.
5. the non-heated type chip oxygen sensor of a kind of two line according to claim 4, which is characterized in that first catalysis
Electrode (301) and second catalysis are outer in interior electrode (201) and first catalysis external electrode (203), second catalysis
Electrode (303) is platinum material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920356417.XU CN209673709U (en) | 2019-03-20 | 2019-03-20 | A kind of non-heated type chip oxygen sensor of two lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920356417.XU CN209673709U (en) | 2019-03-20 | 2019-03-20 | A kind of non-heated type chip oxygen sensor of two lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209673709U true CN209673709U (en) | 2019-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920356417.XU Active CN209673709U (en) | 2019-03-20 | 2019-03-20 | A kind of non-heated type chip oxygen sensor of two lines |
Country Status (1)
| Country | Link |
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| CN (1) | CN209673709U (en) |
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2019
- 2019-03-20 CN CN201920356417.XU patent/CN209673709U/en active Active
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