CN2729721Y - Plate-shape oxygen sensor - Google Patents
Plate-shape oxygen sensor Download PDFInfo
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- CN2729721Y CN2729721Y CN 200420079906 CN200420079906U CN2729721Y CN 2729721 Y CN2729721 Y CN 2729721Y CN 200420079906 CN200420079906 CN 200420079906 CN 200420079906 U CN200420079906 U CN 200420079906U CN 2729721 Y CN2729721 Y CN 2729721Y
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- electrode
- supporter
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- groove shape
- oxygen sensor
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Abstract
The utility model relates to an oxygen sensor, especially an oxygen sensor used for controlling the proportion of air and fuels in a car engine. The utility model comprises a concave-groove-shaped supporter 1 with an open end and a laminated sensitive ceramic element 2, wherein, the bottom of the alumina groove-shaped ceramic supporter is provided with a mini-type heating device, and the open end of the supporter is fixedly connected with electrodes 3, 4, and the alumina groove-shaped ceramic supporter is made by a die pressing method. The upper and the lower surfaces of the laminated zircite sensitive element 2 are provided with a measuring electrode and a reference electrode, the laminated zircite sensitive element 2 is likewise made by a die pressing method, and the measuring electrode and the reference electrode are led to the same ends 5, 6 by the printed electrode wires. Then the sensitive element is additionally covered on the groove-shaped supporter and is coated with sealing frit to sinter and seal, and thus, the mini-type plate-shaped oxygen sensor with a heater is formed. Because the heating electrode end and the measuring electrode end are distributed on different plane surfaces of the same end, the connection is easy; because the size of the sensor is small, the heating speed high, and the preparation technique is simple.
Description
Affiliated technical field:
The utility model relates to a kind of lambda sensor, particularly is a kind of lambda sensor that is used for Control of Automobile engine air and fuel ratio.
Prior art:
At present, the Hyundai Motor internal combustion engine is adopted is used to remove the objectionable impurities that is produced by internal combustion engine, CO for example, the method for HC and NOx is: detect institute and discharges oxygen concentration in the gas, and be the basic amount of controlling the air and the fuel of IC engine supply based on detected oxygen concentration numerical value.As pick-up unit, main employing is the lambda sensor of solid electrolyte type at present, and it comprises a cylindrical tube, the end sealing of this pipe, and this pipe is to constitute by mainly having comprised the zirconic solid electrolyte with oxygen ion conduction characteristic; And the skin and the lip-deep pair of electrode layers of internal layer that are placed in cylindrical duct respectively.Conventional representative lambda sensor comprises by ZrO
2: solid electrolyte makes and the cylindrical duct of end seal, be structured in the contrast electrode on the terminal inside surface of cylindrical duct and be structured in potential electrode on the cylindrical duct distal outer surface.Contrast electrode and reference gas for example air contact, potential electrode then with gas to be measured for example waste gas contact, the end of cylindrical duct is as sensitive element.
At lambda sensor or be used for air and fuel ratio be controlled in the empty combustion ratio sensor (going into sensor) of so-called stoichiometry type about 1; made up the ceramic porous layer of one deck on the surface of potential electrode as protective seam; under predetermined temperature, detect the difference of cylindrical duct both sides oxygen concentration, so that the sky one combustion ratio in the control engine aspirating system.Here, the sensor unit of the empty combustion ratio sensor of stoichiometry type must be heated to similar about 70 ℃ working temperature.For realizing this purpose, heater air flow pressure switch rod is inserted in the cylindrical tube.Yet in recent years,, impel people just to start at the beginning and can detect CO, HC, NOx at engine owing to formulated strict rules at toxic emission.The direct-heating-type cylindrical oxygen sensor that in cylindrical duct, has well heater, owing to before sensitive element is added to activation temperature, need one long period, thereby be difficult to fully satisfy the rules institute requirement of relevant waste gas.
In order to improve this defective, the someone has proposed a kind of lambda sensor recently.In this lambda sensor, potential electrode is formed on the outside surface of flat disk solid electrolyte matrix, and contrast electrode is formed on the inside surface of solid electrolyte matrix.And, on the total inner surface of solid electrolyte matrix, all disposed the platinum well heater that coats by ceramic insulating layer, so just constituted and the incorporated lambda sensor structure of well heater.
Adopted directly-heated system with the incorporated lambda sensor of well heater, can be heated fast.Yet because sensitive element is very big, lambda sensor can not be heated rapidly to enough degree, so still can show lower gas response performance.
The Japanese honda skill is ground " a kind of lambda sensor " of Industrial Co., Ltd's invention, the detecting element of this lambda sensor is in the both sides of the 1st tabular electrode, by the 1st solid electrolyte layer and the 2nd solid electrolyte layer, the the 2nd, the 3rd electrode relatively is set respectively, thereby can detect between the 1st and the 2nd electrode, and the 1st and the 3rd interelectrode oxonium ion is mobile.Because two faces of the 1st electrode all form detection faces, directivity enlarges along 2 directions.Because any one in the 2nd, the 3rd electrode is near exhaust stream, it contacts earlier with exhaust like this, and the reaction time more earlier.This sensor remains the stack of solid electrolyte layer, exists processing and connects difficulty, still can show lower gas response performance.
The purpose of invention:
The purpose of this utility model is that one of purpose of the present invention provides a kind of processing and connection is all very convenient, shows the small-sized tabular lambda sensor of fabulous gas response performance.
Technical scheme:
The utility model is to realize the foregoing invention purpose like this.
The utility model comprises groove shape supporter and the lamellar sensitive ceramic element that an end opens wide.The aluminium oxide groove shape ceramic supporting body bottom that is made by die pressing is provided with miniature heating arrangement, and at the fixedly connected electrode of open end.The same thin plate zirconia sensitive element upper and lower surface that is made by die pressing is provided with potential electrode and contrast electrode, and causes same end by the electrode wires of printing.Sensitive element is added a cover on the groove shape supporter then, and the sealing of coating seal glass material sintering, the miniature tabular lambda sensor that has well heater formed.
Beneficial effect:
The utility model is the tabular lambda sensor of a kind of novel easy manufacturing because heating electrode end and potential electrode end are distributed on the same end Different Plane, make couple together easier; Since small-sized, make firing rate faster, and technology of preparing is simple.
Description of drawings:
Below in conjunction with accompanying drawing the utility model is described further.
Accompanying drawing 1 is a structural representation of the present utility model;
Accompanying drawing 2 is structural representation front views of the present utility model;
Accompanying drawing 3 is upward views of accompanying drawing 2.
1 is groove shape supporter in the accompanying drawing, the 2nd, and lamellar sensitive ceramic element, the 3rd, the fixedly connected electrode I of open end, the 4th, the fixedly connected electrode II of open end, the 5th, the electrode I of printing, the 6th, the electrode II of printing.
Embodiment:
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
The utility model is the tabular lambda sensor of a kind of novel easy manufacturing.It comprises groove shape supporter (1) and the lamellar sensitive ceramic element (2) that an end opens wide.The aluminium oxide groove shape ceramic supporting body bottom that is made by die pressing is provided with miniature heating arrangement, and fixedlys connected electrode II (4) with open end at the fixedly connected electrode I of open end (3).Same thin plate zirconia sensitive element (1) upper and lower surface that is made by die pressing is provided with potential electrode and contrast electrode, and causes same end (5,6) by the electrode wires of printing.Sensitive element is added a cover on the groove shape supporter then, and the sealing of coating seal glass material sintering, the miniature tabular lambda sensor that has well heater formed.Because heating electrode end and potential electrode end are distributed on the same end Different Plane, make couple together easier; Since small-sized, make firing rate faster, and technology of preparing is simple.
Claims (5)
1. a tabular lambda sensor is made up of groove shape supporter and lamellar sensitive ceramic element that an end opens wide.Groove shape ceramic supporting body bottom is provided with miniature heating arrangement, and at the fixedly connected electrode of open end.Same sensitive ceramic element upper and lower surface is provided with potential electrode and contrast electrode, and causes same end by the electrode wires of printing.Sensitive element is added a cover on the groove shape supporter, and is coated with the sealing of seal glass material sintering.
2. tabular lambda sensor according to claim 1 is characterized in that groove shape supporter is made by die pressing.
3. tabular lambda sensor according to claim 1 is characterized in that lamellar sensitive ceramic element is made by die pressing.
4. according to claim 1 and 2 described tabular lambda sensors, the material that it is characterized in that groove shape supporter is an aluminium oxide.
5. according to claim 1 and 3 described tabular lambda sensors, the material that it is characterized in that lamellar sensitive ceramic element is a zirconia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420079906 CN2729721Y (en) | 2004-09-30 | 2004-09-30 | Plate-shape oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420079906 CN2729721Y (en) | 2004-09-30 | 2004-09-30 | Plate-shape oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2729721Y true CN2729721Y (en) | 2005-09-28 |
Family
ID=35048496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420079906 Expired - Fee Related CN2729721Y (en) | 2004-09-30 | 2004-09-30 | Plate-shape oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2729721Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636527A (en) * | 2012-04-23 | 2012-08-15 | 常州联德电子有限公司 | Inlaid plate-shaped oxygen sensor and preparation method thereof |
-
2004
- 2004-09-30 CN CN 200420079906 patent/CN2729721Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636527A (en) * | 2012-04-23 | 2012-08-15 | 常州联德电子有限公司 | Inlaid plate-shaped oxygen sensor and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |