CN215408822U - Sensor mounting structure - Google Patents
Sensor mounting structure Download PDFInfo
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- CN215408822U CN215408822U CN202121177036.9U CN202121177036U CN215408822U CN 215408822 U CN215408822 U CN 215408822U CN 202121177036 U CN202121177036 U CN 202121177036U CN 215408822 U CN215408822 U CN 215408822U
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- sensor
- exhaust gas
- exhaust
- mounting structure
- converter
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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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Abstract
The utility model provides a sensor mounting structure, which can disperse thermal deformation and stress during assembly and rectify exhaust gas, thereby improving structural durability and accuracy of a sensor. The sensor mounting structure includes: a converter having an exhaust inlet portion at a side end portion; and a sensor mount provided at an upper end portion of the converter, wherein a height of the exhaust gas inlet portion is different from a height of an exhaust gas inflow end of the sensor mount, at least a portion of the converter is formed with a first flat portion adjacent to the exhaust gas inlet portion, and a second flat portion extending from the first flat portion toward the sensor mount, at least a portion of the sensor mount is provided on the second flat portion, and a sensor is mounted on the sensor mount so as to correspond to exhaust gas entering from the exhaust gas inlet portion.
Description
Technical Field
The present invention relates to a sensor mounting structure, and more particularly to a mounting structure of an exhaust gas sensor for detecting an air-fuel ratio of exhaust gas.
Background
In general, in order to operate an internal combustion engine for a vehicle at an appropriate Air-Fuel Ratio (a/F Ratio), an Air-Fuel Ratio control is performed based on a detection result of an exhaust gas sensor (for example, an oxygen sensor or a Linear Air-Fuel Ratio (LAF) sensor, hereinafter referred to as LAF sensor) provided in an exhaust passage, and a Fuel injection amount, an intake Air amount, and the like are feedback-controlled.
For example, patent document 1 discloses that a plurality of cylinders are provided in an internal combustion engine body, exhaust portions of the plurality of cylinders are connected to a single exhaust pipe via a converter (converter), and a sensor mount is provided on a straight pipe portion of the converter near an exhaust inlet portion, so that the exhaust inlet portion of the converter and the exhaust inflow end of the sensor mount are continuous planes of the same height. Thus, the exhaust gas sensor is mounted on the sensor mounting seat, and exhaust gas detection can be performed in accordance with the exhaust gas entering from the exhaust gas inlet portion.
However, in this case, if the step portion is further provided on the straight cylinder portion of the converter based on design considerations, when the sensor mount is joined and fixed to the straight cylinder portion of the converter by welding or the like, the step portion of the converter is adjacent to the sensor mount, and thermal deformation and stress are likely to occur during assembly, and the fluidity of the exhaust gas flowing in from the exhaust inlet portion is likely to deteriorate, thereby causing the exhaust gas sensor to fail to detect the exhaust gas accurately.
[ patent document ]
[ patent document 1] Japanese patent No. 5602121
SUMMERY OF THE UTILITY MODEL
The utility model provides a sensor mounting structure, which can disperse thermal deformation and stress during assembly and rectify exhaust gas, thereby improving structural durability and accuracy of a sensor.
The present invention provides a sensor mounting structure, including: a converter having an exhaust inlet portion at a side end portion; and a sensor mount provided at an upper end portion of the converter, wherein a height of the exhaust gas inlet portion is different from a height of an exhaust gas inflow end of the sensor mount, at least a portion of the converter is formed with a first flat portion adjacent to the exhaust gas inlet portion, and a second flat portion extending from the first flat portion toward the sensor mount, at least a portion of the sensor mount is provided on the second flat portion, and a sensor is mounted on the sensor mount so as to correspond to exhaust gas entering from the exhaust gas inlet portion.
In an embodiment of the present invention, the second flat surface portion is inclined toward the sensor mount.
In an embodiment of the present invention, the detection portion of the sensor is disposed at a position lower than the first flat portion and corresponds to the exhaust gas entering from the exhaust gas inlet portion.
In an embodiment of the present invention, at least a portion of the sensor mount is engaged and fixed with the second flat surface portion.
In view of the above, in the sensor mounting structure of the present invention, the converter has the exhaust gas inlet portion at the side end portion, and the sensor mount is provided at the upper end portion of the converter, wherein the exhaust gas inlet portion has a height different from that of the exhaust gas inflow end of the sensor mount, at least a portion of the converter is formed with the first flat portion adjacent to the exhaust gas inlet portion, and the second flat portion extending from the first flat portion toward the sensor mount, at least a portion of the sensor mount is provided on the second flat portion, and the sensor is mounted on the sensor mount so as to correspond to the exhaust gas entering from the exhaust gas inlet portion. In this way, the first flat section and the second flat section are provided between the exhaust inlet section and the sensor mount, which are different in height, so that thermal deformation and stress during assembly can be dispersed, and the exhaust gas flowing in from the exhaust inlet section can be rectified to smoothly flow to the sensor mounted on the sensor mount, as compared with the conventional technique in which the step section is provided. Accordingly, the sensor mounting structure of the present invention can disperse thermal deformation and stress at the time of assembly and rectify exhaust gas, thereby improving structural durability and accuracy of the sensor.
In order to make the aforementioned and other features and advantages of the utility model more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a perspective view of a sensor mounting structure according to an embodiment of the present invention;
FIG. 2 is a side schematic view of the sensor mounting structure of FIG. 1 in use in an internal combustion engine;
fig. 3 is a partially enlarged schematic view of the sensor mounting structure shown in fig. 2.
Description of reference numerals:
50: an internal combustion engine structure;
60: an internal combustion engine body;
62: an exhaust section;
70: an exhaust pipe;
80: a sensor;
82: a detection unit;
100: a sensor mounting structure;
110: a converter;
112: an exhaust inlet portion;
114: an exhaust outlet portion;
116: an exhaust passage;
118 a: a first planar portion;
118 b: a second planar section;
120: a sensor mount;
122: an exhaust gas inflow end;
h: a height difference;
p: a path.
Detailed Description
Fig. 1 is a perspective view of a sensor mounting structure according to an embodiment of the present invention, fig. 2 is a side view of the sensor mounting structure shown in fig. 1 applied to an internal combustion engine, and fig. 3 is a partially enlarged view of the sensor mounting structure shown in fig. 2. Referring to fig. 1 to 3, in the present embodiment, the sensor mounting structure 100 is suitable for being applied to an internal combustion engine structure 50, for example, connected between an internal combustion engine body 60 and an exhaust pipe 70 as shown in fig. 2, and the sensor 80 is mounted on the sensor mounting structure 100, thereby detecting exhaust gas flowing from the internal combustion engine body 60 to the exhaust pipe 70. The specific structure of the sensor mounting structure 100 and the manner of application in the internal combustion engine structure 50 will be described below with reference to fig. 1 to 3. However, the present invention is not limited to the specific structure and use of the sensor mounting structure 100, and it can be adjusted according to the requirements.
Specifically, as shown in fig. 1 and 2, in the present embodiment, the sensor mounting structure 100 includes a transducer 110 and a sensor mounting base 120. The converter 110 has an exhaust inlet 112 at a side end portion, an exhaust outlet 114 at a lower end portion, and an exhaust passage 116 located inside and communicating the exhaust inlet 112 and the exhaust outlet 114. The sensor mount 120 is provided at an upper end portion of the converter 110, and penetrates a side wall of the converter 110 to communicate with the exhaust passage 116.
Further, in the present embodiment, as shown in fig. 2, the engine structure 50 includes an engine body 60, an exhaust pipe 70, a sensor 80, and a sensor mounting structure 100. Wherein the internal combustion engine body 60 is provided inside with a plurality of gas cylinders (not shown) which are respectively provided with corresponding gas discharge portions 62 (one gas discharge portion 62 is shown in the side view of fig. 2 as an example, and a plurality of gas discharge portions 62 may be provided side by side in practice), and the gas discharge portions 62 are connected to the exhaust pipe 70 via the converter 110. In correspondence with this, the exhaust inlet portion 112 of the converter 110 is constructed in an open structure extending in the lateral direction as shown in fig. 1 to correspond to the connection of the exhaust portions 62 of the plurality of gas cylinders to the single exhaust pipe 70. The sensor 80 is, for example, an oxygen sensor or an LAF sensor as an exhaust gas sensor, and can be used to detect the air-fuel ratio of exhaust gas and perform feedback control of the fuel injection amount, the intake air amount, and the like, but the present invention is not limited to the type and the application of the sensor 80, and may be adjusted as needed.
As can be seen, in the case where sensor 80 is mounted to sensor mounting structure 100, sensor 80 is mounted to sensor mount 120 such that sensing portion 82 of sensor 80 (e.g., located at the bottom end of sensor 80) is located in exhaust passage 116 and corresponds to exhaust inlet portion 112 by way of sensor mount 120. Therefore, the exhaust gas generated in the engine structure 50 flows from the exhaust portion 62 of the plurality of gas cylinders located in the engine body 60 to the exhaust inlet portion 112 of the converter 110, and flows from the exhaust outlet portion 114 of the converter 110 to the exhaust pipe 70, and in the process, the exhaust gas flowing from the exhaust inlet portion 112 to the exhaust outlet portion 114 flows through the detection portion 82 of the sensor 80 located in the exhaust passage 116, whereby the exhaust gas flowing from the engine body 60 to the exhaust pipe 70 can be detected via the detection portion 82 of the sensor 80.
The specific structure of the sensor mounting structure 100 is further described below. Referring to fig. 1 and 3, in the present embodiment, since the exhaust inlet 112 is located at the side end of the converter 110 and the sensor mount 120 is disposed at the upper end of the converter 110, the height of the exhaust inlet 112 is different from the height of the exhaust inflow end 122 of the sensor mount 120 (i.e., the end corresponding to the exhaust inlet 112) (e.g., has a height difference H as shown in fig. 3). Further, at least a part of the converter 110 is formed with a first flat portion 118a adjacent to the exhaust inlet portion 112, and a second flat portion 118b extending from the first flat portion 118a toward the sensor mount 120, and at least a part of the sensor mount 120 is disposed on the second flat portion 118 b.
Preferably, in the present embodiment, the first flat surface portion 118a is configured as a plane substantially parallel to the pipe wall of the exhaust inlet portion 112, and the second flat surface portion 118b is configured as an inclined plane inclined toward the sensor mounting seat 120. That is, the first flat portion 118a and the second flat portion 118b are connected to each other and inclined to each other, and thus the first flat portion 118a and the second flat portion 118b are not continuous planes of the same height and are not stepped portions. As a result, in the process of disposing at least a part of the sensor mount 120 on the second flat portion 118b, for example, at least a part of the sensor mount 120 is joined and fixed to the second flat portion 118b by welding, and thermal deformation and stress at the time of assembly can be dispersed through the first flat portion 118a and the second flat portion 118b which are connected to each other and inclined to each other, thereby improving structural durability.
In the present embodiment, when the sensor 80 is mounted on the sensor mounting structure 100, the sensor 80 is mounted on the sensor mounting seat 120 so as to correspond to the exhaust gas entering from the exhaust gas inlet portion 112, and the exhaust gas flows from the side end portion having a relatively low height (i.e., the exhaust gas inlet portion 112) to the upper end portion having a relatively high height (i.e., the exhaust gas inlet end 122 of the sensor mounting seat 120) by being guided by the first flat portion 118a and the second flat portion 118 b. In this case, since the first flat surface portion 118a and the second flat surface portion 118b are formed in a flat surface, the exhaust gas flowing in from the exhaust inlet portion 112 can be rectified and smoothly flow to the sensor 80 mounted on the sensor mounting seat 120.
Further, in the present embodiment, since the first flat portion 118a is adjacent to the side end portion having a lower height (i.e., the exhaust inlet portion 112) and the second flat portion 118b is adjacent to the upper end portion having a higher height (i.e., the exhaust inflow end 122 of the sensor mount 120), and at least a portion of the sensor mount 120 is disposed on the second flat portion 118b, it is preferable that the detection portion 82 of the sensor 80 mounted on the sensor mount 120 is disposed at a position (as shown in fig. 3) lower than the first flat portion 118a so as to correspond to the exhaust gas entering from the exhaust inlet portion 112. In this way, the exhaust gas flowing in from the exhaust inlet 112 is easily caused to flow to the detection portion 82 of the sensor 80 located below the first flat portion 118a (as indicated by a path P in fig. 3) by rectification of the first flat portion 118a, and is easily caused to flow to the detection portion 82 of the sensor 80 by being guided to the lower side of the sensor mount 120 via the second flat portion 118b inclined toward the sensor mount 120, whereby the accuracy of the sensor 80 can be improved.
However, the specific structure of the sensor mounting structure 100 and the application manner in the internal combustion engine structure 50 are only an example of the present invention, and the present invention is not limited thereto, and can be adjusted according to the requirements.
In summary, in the sensor mounting structure of the present invention, the converter has the exhaust gas inlet portion at the side end portion, and the sensor mount is provided at the upper end portion of the converter, wherein the exhaust gas inlet portion has a height different from that of the exhaust gas inflow end of the sensor mount, at least a portion of the converter is formed with a first flat portion adjacent to the exhaust gas inlet portion, and a second flat portion extending from the first flat portion toward the sensor mount, at least a portion of the sensor mount is provided on the second flat portion, and the sensor is mounted on the sensor mount so as to correspond to the exhaust gas entering from the exhaust gas inlet portion. In particular, the second flat surface portion is inclined toward the sensor mounting seat, the detection portion of the sensor is disposed at a position lower than the first flat surface portion corresponding to the exhaust gas entering from the exhaust gas inlet portion, and at least a portion of the sensor mounting seat is engaged and fixed with the second flat surface portion. In this way, the first flat section and the second flat section are provided between the exhaust inlet section and the sensor mount, which are different in height, so that thermal deformation and stress during assembly can be dispersed, and the exhaust gas flowing in from the exhaust inlet section can be rectified to smoothly flow to the sensor mounted on the sensor mount, as compared with the conventional technique in which the step section is provided. Accordingly, the sensor mounting structure of the present invention can disperse thermal deformation and stress at the time of assembly and rectify exhaust gas, thereby improving structural durability and accuracy of the sensor.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A sensor mounting structure, characterized by comprising:
a converter having an exhaust inlet portion at a side end portion; and
a sensor mount provided at an upper end portion of the converter, wherein,
the height of the exhaust inlet portion is different from the height of the exhaust inflow end of the sensor mount,
at least a portion of the converter is formed with a first flat portion adjacent to the exhaust inlet portion and a second flat portion extending from the first flat portion toward the sensor mount,
at least a portion of the sensor mount is disposed on the second planar portion, and a sensor is mounted on the sensor mount corresponding to exhaust gas entering from the exhaust gas inlet portion.
2. The sensor mounting structure according to claim 1, wherein the second flat surface portion is inclined toward the sensor mount.
3. The sensor mounting structure according to claim 1 or 2, wherein a detection portion of the sensor is provided at a position lower than the first flat portion so as to correspond to the exhaust gas entering from the exhaust gas inlet portion.
4. The sensor mounting structure according to claim 1, wherein at least a portion of the sensor mount is engaged and fixed with the second planar portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121177036.9U CN215408822U (en) | 2021-05-28 | 2021-05-28 | Sensor mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121177036.9U CN215408822U (en) | 2021-05-28 | 2021-05-28 | Sensor mounting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215408822U true CN215408822U (en) | 2022-01-04 |
Family
ID=79677632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121177036.9U Active CN215408822U (en) | 2021-05-28 | 2021-05-28 | Sensor mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215408822U (en) |
-
2021
- 2021-05-28 CN CN202121177036.9U patent/CN215408822U/en active Active
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