CN118224019A - EGR gas taking structure - Google Patents
EGR gas taking structure Download PDFInfo
- Publication number
- CN118224019A CN118224019A CN202410378613.2A CN202410378613A CN118224019A CN 118224019 A CN118224019 A CN 118224019A CN 202410378613 A CN202410378613 A CN 202410378613A CN 118224019 A CN118224019 A CN 118224019A
- Authority
- CN
- China
- Prior art keywords
- pipe
- gas
- air inlet
- taking
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005192 partition Methods 0.000 claims description 15
- 238000010992 reflux Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 40
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/40—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with timing means in the recirculation passage, e.g. cyclically operating valves or regenerators; with arrangements involving pressure pulsations
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses an EGR gas taking structure, which comprises an EGR cooler and an air inlet pipe connected with the EGR cooler, wherein the air inlet pipe comprises an elbow pipe, a first corrugated pipe, a straight pipe, a second corrugated pipe and a gas taking pipe, two ends of the straight pipe are respectively connected with the first corrugated pipe and the second corrugated pipe, the other end of the first corrugated pipe is connected with one end of the elbow pipe, and the other end of the elbow pipe is connected with an air inlet interface of the EGR cooler; the other end of the second corrugated pipe is connected with the gas taking pipe. The invention has the advantages of reducing gas reflux, reducing the resistance of the whole pipeline, and the like.
Description
Technical Field
The invention relates to the technical field of EGR (exhaust gas recirculation), in particular to an EGR gas taking structure.
Background
The exhaust gas recirculation (Exhaust gas recirculation) system is referred to as an EGR system. Engines re-introduce a portion of the exhaust gas produced by combustion into cylinders via an EGR system to participate in combustion. EGR systems are primarily intended to reduce Nitrogen Oxide (NOX) emissions in the exhaust. With the improvement of the performance of the national six engine, the combustion exhaust temperature of the engine is continuously increased, part of high-temperature exhaust gas exhausted by the combustion of the engine flows into the EGR cooler from the end of the exhaust pipe through the air inlet connecting pipe of the EGR cooler, and the thermal deformation of the joint flange surface of the air inlet connecting pipe of the EGR cooler is easily caused due to the high exhaust temperature, so that the exhaust gas is leaked.
The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the application and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by virtue of prior application or that it is already disclosed at the date of filing of this application.
Disclosure of Invention
The invention aims to provide an EGR gas taking structure capable of reducing gas backflow and reducing overall pipeline resistance.
Therefore, the invention provides an EGR gas taking structure.
Preferably, the present invention may further have the following technical features:
The EGR gas taking structure comprises an EGR cooler and an air inlet pipe connected with the EGR cooler, wherein the air inlet pipe comprises an elbow pipe, a first corrugated pipe, a straight pipe, a second corrugated pipe and a gas taking pipe, two ends of the straight pipe are respectively connected with the first corrugated pipe and the second corrugated pipe, the other end of the first corrugated pipe is connected with one end of the elbow pipe, and the other end of the elbow pipe is connected with an air inlet interface of the EGR cooler; the other end of the second corrugated pipe is connected with the gas taking pipe.
Further, the bent pipe is a 180-degree bent pipe.
Further, the first corrugated pipe, the straight pipe, the second corrugated pipe and the gas taking pipe are connected into a straight line shape and distributed on the side of the EGR cooler.
Further, the gas taking pipe is of a double-channel gas taking structure, the gas inlet end of the gas taking pipe is provided with 2 gas inlet cavities, and the 2 gas inlet cavities extend to the front end of the gas taking pipe and are combined to form a throat as a gas outlet port.
Further, the air inlet end of the air taking pipe is provided with an everting flange surface.
Further, the inner diameter of the air inlet end of the air taking pipe is larger than the inner diameter of the air outlet end of the air taking pipe, wherein the air inlet end is provided with a partition plate, and the partition plate divides a pipe cavity of the air inlet end into a first air inlet cavity and a second air inlet cavity.
Further, one end of the partition plate is flush with the end face of the air inlet end of the air taking pipe, and the other end of the partition plate extends along the length direction of the air taking pipe.
Further, the length L of the partition board is K, and the length of the gas taking pipe is more than 1/3L and less than 1/2L.
Compared with the prior art, the invention has the beneficial effects that: by adopting the corrugated pipe scheme, the stress brought by high temperature is released, and the reliability is improved. The double-flow-passage gas taking is adopted, the converging position is provided with a roar, so that the pulse energy of exhaust gas can be fully utilized, the gas reflux is reduced, the resistance of the whole pipeline is reduced, and the EGR introduction capability is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a tracheal tube of the present invention.
Detailed Description
The invention will be described in further detail with reference to the following detailed description and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the invention or its applications.
Non-limiting and non-exclusive embodiments will be described with reference to the following drawings, in which like reference numerals refer to like elements unless otherwise specified.
The EGR gas taking structure comprises an EGR cooler 1 and an air inlet pipe connected with the EGR cooler 1, wherein the air inlet pipe comprises a bent pipe 2, a first corrugated pipe 3, a straight pipe 4, a second corrugated pipe 5 and a gas taking pipe 6, two ends of the straight pipe 4 are respectively connected with the first corrugated pipe 3 and the second corrugated pipe 5, the other end of the first corrugated pipe 3 is connected with one end of the bent pipe 2, and the other end of the bent pipe 2 is connected with a gas inlet interface of the EGR cooler 1. The other end of the second corrugated pipe 5 is connected with the gas taking pipe 6. By adopting the corrugated pipe scheme, the stress brought by high temperature is released, and the reliability is improved.
Preferably, the elbow 2 is a 180 ° elbow. After the connection, the first bellows 3, the straight pipe 4, the second bellows 5, and the gas intake pipe 6 are connected in a straight line shape and distributed on the side of the EGR cooler 1.
Specifically, the air taking pipe 6 is a double-channel air taking structure, the air inlet end of the air taking pipe is provided with 2 air inlet cavities, and the 2 air inlet cavities extend to the front end of the air taking pipe 6 and are combined to form a throat 7 serving as an air outlet port. The double-flow-passage gas taking is adopted, the roar 7 is arranged at the merging position, so that the pulse energy of exhaust gas can be fully utilized, the gas reflux is reduced, the resistance of the whole pipeline is reduced, and the EGR introduction capability is improved. Preferably, the air inlet end of the air taking pipe 6 is provided with an everting flange surface.
More specifically, the inner diameter of the air inlet end of the air taking pipe 6 is larger than the inner diameter of the air outlet end of the air taking pipe, wherein the air inlet end is provided with a partition board 10, and the partition board 10 divides the pipe cavity of the air inlet end into a first air inlet cavity 8 and a second air inlet cavity 9. One end of the partition board 10 is flush with the end face of the air inlet end of the air taking pipe 6, and the other end extends along the length direction of the air taking pipe 6. The length of the partition board 10 is less than half the length of the air taking pipe 6 and more than 1/3 of the length of the air taking pipe 6.
The two ends of the gas taking pipe are in a cylinder structure with a large cylinder and a small cylinder, and are connected through a conical cylinder 11, and the two ends of the conical cylinder are in smooth transition with the large cylinder and the small cylinder of the gas taking pipe respectively. The large cylinder end is provided with the first air inlet cavity and the second air inlet cavity, and the small cylinder end is provided with the throat. The diameters of the first air inlet cavity and the second air inlet cavity are the same and smaller than the diameter of the throat. In some examples, the throat diameter is 34mm, the diameters of the first and second air intake chambers are 26mm, and the included angle of the inner side of the cone 11 is 60 ° or less. Preferably, one end of the partition plate, which is close to the small cylinder, extends to the joint of the large cylinder and the conical cylinder and extends to the small cylinder side, and the extending length is 1/2 of the diameter of the first air inlet cavity. The double-flow-passage gas taking is adopted, the converging position is provided with a roar, so that the pulse energy of exhaust gas can be fully utilized, the gas reflux is reduced, the resistance of the whole pipeline is reduced, and the EGR introduction capability is improved.
Those skilled in the art will recognize that numerous variations are possible in light of the above description, and that the examples and figures are presented for the purpose of describing one or more particular embodiments only.
While there have been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions can be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the invention without departing from the central concept thereof as described herein. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the invention and equivalents thereof.
Claims (8)
1. The utility model provides an EGR gas taking structure, includes the EGR cooler, and with the intake pipe that the EGR cooler connects, its characterized in that: the air inlet pipe comprises an elbow pipe, a first corrugated pipe, a straight pipe, a second corrugated pipe and an air taking pipe, wherein two ends of the straight pipe are respectively connected with the first corrugated pipe and the second corrugated pipe, the other end of the first corrugated pipe is connected with one end of the elbow pipe, and the other end of the elbow pipe is connected with an air inlet interface of the EGR cooler; the other end of the second corrugated pipe is connected with the gas taking pipe.
2. An EGR gas take-off structure according to claim 1, wherein: the bent pipe is a 180-degree bent pipe.
3. An EGR gas take-off structure according to claim 1, wherein: the first corrugated pipe, the straight pipe, the second corrugated pipe and the gas taking pipe are connected into a straight line shape and distributed on the lateral side of the EGR cooler.
4. An EGR gas take-off structure according to claim 1, wherein: the gas taking pipe is of a double-channel gas taking structure, the gas inlet end of the gas taking pipe is provided with 2 gas inlet cavities, and the 2 gas inlet cavities extend to the front end of the gas taking pipe and are converged to form a throat as a gas outlet port.
5. An EGR gas take-off structure according to claim 4, wherein: the air inlet end of the air taking pipe is provided with an everting flange surface.
6. An EGR gas take-off structure according to claim 1, wherein: the inner diameter of the air inlet end of the air taking pipe is larger than that of the air outlet end of the air taking pipe, wherein the air inlet end is provided with a partition plate, and the partition plate divides a pipe cavity of the air inlet end into a first air inlet cavity and a second air inlet cavity.
7. The EGR gas take-off structure according to claim 6, wherein: one end of the partition board is flush with the end face of the air inlet end of the air taking pipe, and the other end of the partition board extends along the length direction of the air taking pipe.
8. The EGR gas take-off structure according to claim 6, wherein: the length L of the partition board is K, and the length of the gas taking pipe is more than 1/3L and less than 1/2L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410378613.2A CN118224019A (en) | 2024-03-29 | 2024-03-29 | EGR gas taking structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410378613.2A CN118224019A (en) | 2024-03-29 | 2024-03-29 | EGR gas taking structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118224019A true CN118224019A (en) | 2024-06-21 |
Family
ID=91503626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410378613.2A Pending CN118224019A (en) | 2024-03-29 | 2024-03-29 | EGR gas taking structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118224019A (en) |
-
2024
- 2024-03-29 CN CN202410378613.2A patent/CN118224019A/en active Pending
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