CN211824793U - Engine exhaust temperature sensor - Google Patents
Engine exhaust temperature sensor Download PDFInfo
- Publication number
- CN211824793U CN211824793U CN202020221326.8U CN202020221326U CN211824793U CN 211824793 U CN211824793 U CN 211824793U CN 202020221326 U CN202020221326 U CN 202020221326U CN 211824793 U CN211824793 U CN 211824793U
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- China
- Prior art keywords
- protection tube
- outer protection
- temperature sensing
- sensing probe
- lead
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- Expired - Fee Related
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- 239000000523 sample Substances 0.000 claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 21
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- 239000010935 stainless steel Substances 0.000 claims description 6
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- 238000003780 insertion Methods 0.000 claims description 3
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- 238000004806 packaging method and process Methods 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
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Images
Abstract
The utility model discloses an engine exhaust temperature sensor, applicable in the different product dimensional requirements such as the degree of depth of putting into, bend angle. The sensor comprises a temperature sensing probe (1), an outer protection tube (2), a limiting gasket (3), a mounting screw (4), a connecting lead (5), a sealing plug (6) and an output lead (7). The temperature sensing probe (1) is used as a standard part of different types of products and comprises a PT200 temperature sensing element, a temperature sensing probe shell and an armored cable; one end of the outer protection tube (2) is connected with the shell of the temperature sensing probe (1) and is arranged in the temperature source to be measured, and the other end of the outer protection tube (2) is arranged outside the temperature source to be measured; the connecting lead (5) is arranged in the outer protection tube (2), one end of the connecting lead is connected with the temperature sensing probe lead, the other end of the connecting lead is connected with the output lead (7), and an output signal of the temperature sensing probe (1) is transmitted to the output end; the sealing plug (6) is arranged in the cold end of the outer protection tube (2), and the outer protection tube (2) and the sealing plug (6) are sealed through riveting. The temperature-sensing probe (1) is used as a standard part in the design, the length and the bending angle of the outer protection tube (2) are adjusted, the product requirements of different installation sizes are quickly met, the production process is greatly simplified, and the product cost is remarkably reduced.
Description
Technical Field
The present invention relates to an exhaust gas temperature sensor for an automotive internal combustion engine.
Background
In order to meet the requirements of the national four and above diesel engines or the national six-emission regulations of gasoline engines, two main solutions are provided for tail gas treatment: firstly, treating nitrogen oxides in tail gas by using a selective catalytic reduction technology and utilizing a urea solution; the other is to treat the particles produced by combustion with a particle trap or a particle catalytic converter. Both of the above two schemes require the detection of the temperature of the exhaust gas and feed back to the corresponding aftertreatment system. Thus requiring real-time monitoring with an exhaust temperature sensor.
At present, the difference of the requirements of different customers and different vehicle types on the exhaust temperature sensor is mainly as follows: the temperature measuring end is embedded in the depth and the cold end bending angle, and the output performance of the sensor is consistent. The packaging structure of the existing exhaust temperature sensor generally comprises a PT200 temperature sensing element, a temperature measuring end shell, an armored cable, a cold end outer protection tube, a limiting gasket, a mounting screw, an output lead and the like. Different armoured cables need to be developed for different products in design and manufacture to meet different customer requirements. This has the following disadvantages: (1) the proportion of the armored cable in the total cost of the sensor is high, about 15% -20%, and the reasons are as follows: (a) the models are too many, the sheathed cables with different lengths of the batch advantage (b) cannot be formed to the maximum extent, and the cost difference is large. (2) The manufacturing process of the temperature sensing end is the most critical and complex of the whole sensor, and the production tool is often required to be switched according to different product models in the manufacturing process, so that the batch stable production of the temperature sensing end cannot be ensured to the maximum extent.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel exhaust temperature sensor packaging structure design to solve the problems in the prior product.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the engine exhaust temperature sensor is characterized by comprising a temperature sensing probe (1), an outer protection tube (2), a limiting gasket (3), a mounting screw (4), a connecting lead (5), a sealing plug (6) and an output lead (7). The temperature sensing probe (1) is used as a standard part of different types of products and comprises a PT200 temperature sensing element, a temperature sensing probe shell and an armored cable; one end of the outer protection tube (2) is connected with the shell of the temperature sensing probe (1) and is arranged in the temperature source to be measured, and the other end of the outer protection tube (2) is arranged outside the temperature source to be measured; the connecting lead (5) is arranged in the outer protection tube (2), one end of the connecting lead is connected with the output lead of the temperature sensing probe, the other end of the connecting lead is connected with the output lead (7), and the output signal of the temperature sensing probe (1) is transmitted to the output end; the sealing plug (6) is arranged in the cold end of the outer protection tube (2), and the outer protection tube (2) and the sealing plug (6) are sealed through riveting.
In a preferred embodiment of the invention, the temperature sensing probe is a standard part for products with different embedded depth requirements, and has the same material, external dimension and output performance characteristics.
In a preferred embodiment of the invention, an outer protective tube is connected with the hot end and the cold end, and the material of the outer protective tube can be stainless steel 301s or nickel alloy 601.
In a preferred embodiment of the invention, the length of the matching end of the outer protection tube and the temperature sensing probe is adjusted to meet the requirements of different products on different insertion depths; the bending angle of the outer protection tube at the cold end is adjusted to meet the requirements of different product installation sizes.
In a preferred embodiment of the present invention, one end of the connecting lead is connected to the output lead of the temperature sensing probe, and a terminal crimping or welding method can be adopted. The connecting lead can adopt nickel alloy 601 or stainless steel 310s material, and the lead insulating layer can adopt glass fiber weaving or silicon dioxide weaving high temperature resistant material.
In a preferred embodiment of the invention, the sealing plug can be made of rubber material which can resist temperature higher than 250 ℃, and is arranged on the cold end side of the outer protection tube, and the outer protection tube and the sealing plug are riveted to realize cold end sealing of the sensor.
The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1, the invention relates to an engine exhaust temperature sensor, which comprises a temperature sensing probe (1), an outer protection tube (2), a limit washer (3), a mounting screw (4), a connecting lead (5), a sealing plug (6) and an output lead (7). The temperature sensing probe (1) is used as a standard part of different types of products and comprises a PT200 temperature sensing element, a temperature sensing probe shell and an armored cable; one end of the outer protection tube (2) is connected with the shell of the temperature sensing probe (1) and is arranged in the temperature source to be measured, and the other end of the outer protection tube (2) is arranged outside the temperature source to be measured; the connecting lead (5) is arranged in the outer protection tube (2), one end of the connecting lead is connected with the output lead of the temperature sensing probe, the other end of the connecting lead is connected with the output lead (7), and the output signal of the temperature sensing probe (1) is transmitted to the output end; the sealing plug (6) is arranged in the cold end of the outer protection tube (2), and the outer protection tube (2) and the sealing plug (6) are sealed through riveting.
Furthermore, the temperature sensing probe is a standard component for products with different embedded depth requirements, and has the same material, shape and size and output performance characteristics.
Therefore, in the process layout, the production process of the exhaust temperature sensor can be divided into a front-temperature sensing probe production and a rear-finished product assembly. Since the temperature sensing probe is a standard component of the whole exhaust temperature sensor, the production arrangement can be completed by one-time production in the whole delivery cycle without being limited to specific product requirements. The production organization of the subsequent finished product assembly takes the temperature sensing probe as a part of the raw material.
Furthermore, the outer protection tube is connected with the hot end and the cold end, and the material of the outer protection tube comprises stainless steel 301s or nickel alloy 601 which can meet the environmental requirement of the exhaust system.
Furthermore, the length of the matching end of the outer protection tube and the temperature sensing probe is adjusted in the structure, so that the requirements of different embedding depths (H) can be met; the requirement of different product installation sizes can be met by adjusting the bending angle (alpha) of the outer protection tube at the cold end. Thus, the original customization of the armor wires with higher cost is changed into the customization production of the outer protection tubes with lower cost and easier batch production.
Furthermore, one end of a connecting lead wire arranged in the outer protective tube is connected with the output lead wire of the temperature sensing probe, and the other end of the connecting lead wire is connected with the output lead wire, wherein the connecting mode comprises but is not limited to a mode of terminal crimping, welding and the like. The material of the connecting lead comprises nickel alloy 601 or stainless steel 310s material. The lead wire insulating material and the lead wire connecting point insulating material comprise glass fiber woven or silicon dioxide woven high-temperature resistant insulating materials.
Furthermore, a sealing plug is arranged at the cold end side of the outer protection tube and used for fixing the output lead and sealing the cold end. The outer protection tube and the sealing plug are sealed at the cold end of the sensor through riveting. The sealing plug material can be selected from rubber materials with temperature resistance higher than 250 ℃.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An engine exhaust temperature sensor is characterized by comprising a temperature sensing probe (1), an outer protection tube (2), a limiting gasket (3), a mounting screw (4), a connecting lead (5), a sealing plug (6) and an output lead (7); the temperature sensing probe (1) is used as a standard part of different types of products and comprises a PT200 temperature sensing element, a temperature sensing probe shell and an armored cable; one end of the outer protection tube (2) is connected with the shell of the temperature sensing probe (1) and is arranged in the temperature source to be measured, and the other end of the outer protection tube (2) is arranged outside the temperature source to be measured; the connecting lead (5) is arranged in the outer protection tube (2), one end of the connecting lead is connected with the output lead of the temperature sensing probe, the other end of the connecting lead is connected with the output lead (7), and the output signal of the temperature sensing probe (1) is transmitted to the output end; the sealing plug (6) is arranged in the cold end of the outer protection tube (2), and the outer protection tube (2) and the sealing plug (6) are sealed through riveting.
2. The exhaust gas temperature sensor according to claim 1, wherein the temperature sensing probe is a standard component for products with different insertion depth requirements, and has the same material, external dimension and output performance characteristics.
3. The exhaust gas temperature sensor according to claim 1, wherein the outer protection tube connects the hot end and the cold end, and the material of the outer protection tube can be stainless steel 301s or nickel alloy 601.
4. The exhaust gas temperature sensor according to claim 1, wherein the length of the end of the outer protection tube opposite to the temperature sensing probe is adjusted to meet the requirements of different products on different insertion depths; the bending angle of the outer protection tube at the cold end is adjusted to meet the requirements of different product installation sizes.
5. The exhaust gas temperature sensor according to claim 1, wherein one end of the connection lead is connected to the output lead of the temperature sensing probe, and a terminal crimping or welding method is adopted. The connecting lead can adopt nickel alloy 601 or stainless steel 310s, and the lead insulating layer can adopt glass fiber weaving or silicon dioxide weaving high temperature resistant material.
6. The exhaust gas temperature sensor according to claim 1, wherein the sealing plug is made of rubber material capable of resisting temperature higher than 250 ℃, and is arranged on the cold end side of the outer protection tube, and the outer protection tube and the sealing plug are riveted to seal the cold end of the sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020221326.8U CN211824793U (en) | 2020-02-28 | 2020-02-28 | Engine exhaust temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020221326.8U CN211824793U (en) | 2020-02-28 | 2020-02-28 | Engine exhaust temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211824793U true CN211824793U (en) | 2020-10-30 |
Family
ID=72997646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020221326.8U Expired - Fee Related CN211824793U (en) | 2020-02-28 | 2020-02-28 | Engine exhaust temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211824793U (en) |
-
2020
- 2020-02-28 CN CN202020221326.8U patent/CN211824793U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |