CN201819899U - Oxygen sensor for detecting concentration of oxygen from automobile exhaust pipe - Google Patents
Oxygen sensor for detecting concentration of oxygen from automobile exhaust pipe Download PDFInfo
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- CN201819899U CN201819899U CN2010205211256U CN201020521125U CN201819899U CN 201819899 U CN201819899 U CN 201819899U CN 2010205211256 U CN2010205211256 U CN 2010205211256U CN 201020521125 U CN201020521125 U CN 201020521125U CN 201819899 U CN201819899 U CN 201819899U
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- zirconia body
- lead
- air inlet
- heating electrode
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model discloses an oxygen sensor for detecting the concentration of oxygen from automobile exhaust pipe, which comprises a casing, a zirconia body, a platinum heating electrode and a connecting seat, wherein the zirconia body is in a tube shape with a closed end; an air inlet baffle is arranged on the periphery of the front part of the zirconia body; an air inlet is arranged on the air inlet baffle; two leads are connected with the rear end of the zirconia body, wherein one lead is electrically connected with the inner wall of the zirconia body, and the other lead is electrically connected with the outer wall of the zirconia body; and both the leads and the platinum heating electrode are sealed and arranged in the casing. The platinum heating electrode has heating and catalyzing effects in the zirconia body, the air inlet ensures the outer side of the zirconia body is communicated with air and the inner side of the zirconia body is communicated with tail gas exhausted by an automobile, and the concentration difference of oxygen on the inner side and the outer side of the zirconia body produces potential difference, so that the concentration of oxygen of tail gas exhausted by the automobile can be detected, and the air-fuel ratio of combustion gas is adjusted through a computer control component ECU. The oxygen sensor has the advantages that the detection accuracy is high, and the oxygen sensor is convenient to replace.
Description
Technical field:
The utility model relates to physical field, relates in particular to measuring technique, particularly automobile exhaust sensor, and concrete is a kind of lambda sensor that the automobile exhaust pipe oxygen concentration detects that is used for.
Background technology:
Use triple mode catalytic converter with the engine that reduces exhaust pollution on, the lambda sensor element that is absolutely necessary.In case because the air-fuel ratio deviation theory air-fuel ratio of combination gas, three-way catalyst will sharply descend to the detergent power of CO, HC and NOx, so lambda sensor is installed in gas outlet, in order to detect the concentration of oxygen in the exhaust, and send feedback signal to ECU, again by the increase and decrease of ECU control fuel injector distributive value, thereby the air-fuel ratio of combination gas is controlled near the theoretical value.Lambda sensor has a specific character, and the voltage of its output has sudden change near theoretical air-fuel ratio (14.7: 1), and this specific character is used to detect concentration of oxygen and feedback to the computer in the exhaust, with the control air-fuel ratio.Its basic functional principle is: (high temperature and platinum catalysis) under certain condition, utilize the difference in oxygen concentration between of the inside and outside both sides of zirconia, produce potential difference (PD), and concentration difference is big more, potential difference (PD) is big more.The content of oxygen is 21% in the atmosphere, and the rich mixture waste gas after burning is oxygen-free in fact, contains more oxygen in waste gas that generates behind the lean combustion or the waste gas because of scarce fire generation, but still than the oxygen much less in the atmosphere.When actual mixing ratio uprises, concentration of oxygen increases and lambda sensor is notified ECU the rare state of combination gas (little electromotive force: 0 volt) in exhaust; When air-fuel ratio was lower than chemically correct fuel, concentration of oxygen reduced in exhaust, and the state of lambda sensor (big electromotive force: 1 volt) notice (ECU) computer.According to the voltage signal of lambda sensor, computer is according to diluting near 14.7: 1 theoretical optimal air-fuel ratio as far as possible or adding rich mixture.Therefore lambda sensor is the key sensor of electronic control fuel metering.Lambda sensor only when high temperature (end reaches more than 300 ℃) its characteristic just can demonstrate fully, could output voltage, it is the fastest to the reacting condition of combination gas in the time of about 800 ℃, and this specific character can great changes will take place when low temperature.The existing lambda sensor that is used for the vehicle exhaust detection causes its precision not high owing to being not easy to make up its working environment; And change inconvenient.
Summary of the invention:
The purpose of this utility model is to provide a kind of lambda sensor that the automobile exhaust pipe oxygen concentration detects that is used for, and describedly thisly is used for lambda sensor that the automobile exhaust pipe oxygen concentration detects and will solves prior art and be used for the technical matters that the lambda sensor precision that vehicle exhaust detects is not high, be not easy to change.
This lambda sensor that the automobile exhaust pipe oxygen concentration detects that is used for of the present utility model, comprise shell, the zirconia body, platinum heating electrode and Connection Block, wherein, described zirconia body is the tubulose of end sealing, the rear portion periphery sealing shroud of zirconia body is provided with one first ceramic pipe, described Connection Block sealing shroud is located at the periphery of first ceramic pipe, the anterior periphery of zirconia body is provided with the air inlet baffle plate, described air inlet baffle plate in a tubular form, the forward end seal of air inlet baffle plate, the rear end and the Connection Block of air inlet baffle plate are tightly connected, the air inlet baffle plate is provided with air admission hole, the rear end of zirconia body is connected with two lead-in wires, wherein a described lead-in wire is electrically connected with the inwall of zirconia body, the described lead-in wire of another root is electrically connected with the outer wall of zirconia body, one end of described shell is connected the rear end of Connection Block, any lead-in wire and described platinum heating electrode all seal setting in the enclosure, any lead-in wire and platinum heating electrode be extending axially along shell all, the other end of shell and a claim-reduction are tightly connected, and lead-in wire and platinum heating electrode all are located in the described claim-reduction.
Further, be provided with one second ceramic pipe in the middle part of shell, lead-in wire and platinum heating electrode all are embedded in described second ceramic pipe, are provided with at interval between lead-in wire and the platinum heating electrode.
Further, an end periphery of described Connection Block is provided with screw thread.
Further, the front end of zirconia body is the round end cone.
Principle of work of the present utility model is: Connection Block is by being threaded onto on the support, with the support junction air air admission hole is arranged, air is by air inlet baffle plate and the external side contacts of zirconia, the external side of zirconia is connected with the waste gas of motor vehicle emission with air communication, inboard, test its oxygen content, the voltage signal that obtains is transported to computer control assembly ECU by two lead-in wires.Platinum heating electrode heated oxide zirconium body.
The utility model and prior art are compared, and its effect is actively with tangible.The utility model is provided with the zirconia body of round end conical shell structure in lambda sensor, side is provided with the platinum heating electrode within it, play heating and catalytic action, on the air inlet baffle plate, offer radial hole, make the external side of zirconia communicate with air, inboard communicate, detect the oxygen concentration in the vehicle exhaust thus, by the air-fuel ratio of computer control assembly ECU adjusting burning gases with the tail gas of motor vehicle emission, the accuracy of detection height, and be convenient to change.
Description of drawings:
Fig. 1 is the structural representation that is used for the lambda sensor of automobile exhaust pipe oxygen concentration detection of the present utility model.
Embodiment:
Embodiment 1:
As shown in Figure 1, the lambda sensor that is used for the detection of automobile exhaust pipe oxygen concentration of the present utility model, by shell 1, zirconia body 2, platinum heating electrode 3 and Connection Block 4 constitute, zirconia body 2 is round end cone shell-like structures that axial cross section roughly is in the shape of the letter V, the zirconia body 2 postmedians outside is arranged with first ceramic pipe 5 hermetically, Connection Block 4 sealing shrouds are located at the periphery of first ceramic pipe 5, zirconia body 2 peripheries are provided with air inlet baffle plate 6, air inlet baffle plate 6 in a tubular form, air inlet baffle plate 6 forward end seal, the rear end of air inlet baffle plate 6 and Connection Block 4 are tightly connected, the air inlet baffle plate is provided with air admission hole 61, the rear end of zirconia body 2 is connected with two lead-in wires 7, wherein a lead-in wire 7 is electrically connected with described zirconia body 2 inwalls, another root lead-in wire 7 is electrically connected with zirconia body 2 outer walls, shell 1 is arranged on the rear end of Connection Block 4, lead-in wire 7 and 3 sealings of platinum heating electrode are arranged in the shell 1, lead-in wire 7 and platinum heating electrode 3 extending axially along shell 1, one end and the Connection Block 4 of shell 1 are tightly connected, the other end of shell 1 and a claim-reduction 8 are tightly connected, lead-in wire 7 and platinum heating electrode 3 are located in the claim-reduction 8, are connected with the outside.
Further, be provided with second ceramic pipe 9 in inboard, described shell 1 middle part, lead-in wire 7 and platinum heating electrode 3 are embedded in second ceramic pipe 9, are provided with the gap between described lead-in wire 7 and the described platinum heating electrode 3.
Further, an end periphery of Connection Block 4 is provided with screw thread, is connected with frame by screw thread, is convenient to dismounting and change.
Concrete, there is the air air admission hole support junction that is connected with the utility model, air is by air inlet baffle plate and the external side contacts of zirconia, the external side of zirconia is connected with the waste gas of motor vehicle emission with air communication, inboard, test its oxygen content, the voltage signal that obtains is transported to computer control assembly ECU by two lead-in wires.
Claims (4)
1. one kind is used for the lambda sensor that the automobile exhaust pipe oxygen concentration detects, comprise shell, the zirconia body, platinum heating electrode and Connection Block, it is characterized in that: described zirconia body is the tubulose of end sealing, the rear portion periphery sealing shroud of zirconia body is provided with one first ceramic pipe, described Connection Block sealing shroud is located at the periphery of first ceramic pipe, the anterior periphery of zirconia body is provided with the air inlet baffle plate, described air inlet baffle plate in a tubular form, the forward end seal of air inlet baffle plate, the rear end and the Connection Block of air inlet baffle plate are tightly connected, the air inlet baffle plate is provided with air admission hole, the rear end of zirconia body is connected with two lead-in wires, wherein a described lead-in wire is electrically connected with the inwall of zirconia body, the described lead-in wire of another root is electrically connected with the outer wall of zirconia body, one end of described shell is connected the rear end of Connection Block, any lead-in wire and described platinum heating electrode all seal setting in the enclosure, any lead-in wire and platinum heating electrode be extending axially along shell all, the other end of shell and a claim-reduction are tightly connected, and lead-in wire and platinum heating electrode all are located in the described claim-reduction.
2. the lambda sensor that is used for the detection of automobile exhaust pipe oxygen concentration as claimed in claim 1, it is characterized in that: be provided with one second ceramic pipe in the middle part of shell, lead-in wire and platinum heating electrode all are embedded in described second ceramic pipe, are provided with at interval between lead-in wire and the platinum heating electrode.
3. the lambda sensor that is used for the detection of automobile exhaust pipe oxygen concentration as claimed in claim 1, it is characterized in that: an end periphery of described Connection Block is provided with screw thread.
4. the lambda sensor that is used for the detection of automobile exhaust pipe oxygen concentration as claimed in claim 1, it is characterized in that: the front end of zirconia body is the round end cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205211256U CN201819899U (en) | 2010-09-07 | 2010-09-07 | Oxygen sensor for detecting concentration of oxygen from automobile exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205211256U CN201819899U (en) | 2010-09-07 | 2010-09-07 | Oxygen sensor for detecting concentration of oxygen from automobile exhaust pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201819899U true CN201819899U (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205211256U Expired - Fee Related CN201819899U (en) | 2010-09-07 | 2010-09-07 | Oxygen sensor for detecting concentration of oxygen from automobile exhaust pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201819899U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837589A (en) * | 2014-03-05 | 2014-06-04 | 常州联德电子有限公司 | Conical double cell wide-band oxygen sensor and manufacture method thereof |
| CN108779926A (en) * | 2016-03-16 | 2018-11-09 | 皇家飞利浦有限公司 | Air purifier and air purification method |
| CN110687187A (en) * | 2019-11-21 | 2020-01-14 | 深圳市久驰精密科技有限公司 | Gas oxygen concentration sensor |
| CN115321977A (en) * | 2022-07-27 | 2022-11-11 | 河南匠人光电设备科技有限公司 | Preparation method for sintering connection between zirconia ceramics |
-
2010
- 2010-09-07 CN CN2010205211256U patent/CN201819899U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837589A (en) * | 2014-03-05 | 2014-06-04 | 常州联德电子有限公司 | Conical double cell wide-band oxygen sensor and manufacture method thereof |
| CN108779926A (en) * | 2016-03-16 | 2018-11-09 | 皇家飞利浦有限公司 | Air purifier and air purification method |
| CN108779926B (en) * | 2016-03-16 | 2021-02-05 | 皇家飞利浦有限公司 | Air purifier and method for detecting condition of gas filter |
| CN110687187A (en) * | 2019-11-21 | 2020-01-14 | 深圳市久驰精密科技有限公司 | Gas oxygen concentration sensor |
| CN115321977A (en) * | 2022-07-27 | 2022-11-11 | 河南匠人光电设备科技有限公司 | Preparation method for sintering connection between zirconia ceramics |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20110907 |