CN111749822B - Air inlet pipe structure of engine - Google Patents
Air inlet pipe structure of engine Download PDFInfo
- Publication number
- CN111749822B CN111749822B CN202010765940.5A CN202010765940A CN111749822B CN 111749822 B CN111749822 B CN 111749822B CN 202010765940 A CN202010765940 A CN 202010765940A CN 111749822 B CN111749822 B CN 111749822B
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- CN
- China
- Prior art keywords
- air inlet
- intake manifold
- flanges
- neck
- pipe structure
- 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.)
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Links
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- 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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/104—Intake manifolds
-
- 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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
-
- 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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10262—Flow guides, obstructions, deflectors or the like
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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
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Characterised By The Charging Evacuation (AREA)
Abstract
The invention discloses an air inlet pipe structure of an engine, which comprises an air inlet pipe body, a neck part, an upper air inlet main pipe and a lower air inlet main pipe. The air inlet is arranged at the upper part of the air inlet pipe body; the neck is arranged at the lower part of the air inlet; an upper intake manifold is disposed on a rear side of the neck, the upper intake manifold including a plurality of first flanges; a lower inlet manifold disposed on a front side of the neck, the lower inlet manifold including a plurality of second flanges; wherein the upper intake manifold is positioned at a level higher than the lower intake manifold. The front and rear of the air inlet and the neck of the air inlet pipe structure are respectively provided with the upper air inlet main pipe and the lower air inlet main pipe with different levels, so that the air flow conditions in the air inlet channels of all cylinders are similar, and the uniformity of the flow coefficient and the vortex ratio of all cylinders is ensured.
Description
Technical Field
The invention relates to the field of engines, in particular to an air inlet pipe structure of an engine.
Background
At present, the emission regulations of the engine are more and more strict, and the requirements of customers on driving comfort are improved, so that higher targets are put on the emission performance and NVH performance of the engine. The uniformity of air inflow and swirl ratio of each cylinder directly affects the working uniformity of each cylinder of the engine, and the working uniformity of each cylinder is closely related to the emission of each cylinder and the NVH performance of the whole engine. In order to ensure the working uniformity of each cylinder of the engine, the design of the air inlet pipe structure is particularly important. The air inlet mode can be divided into an end face air inlet mode and an intermediate air inlet mode, the end face air inlet mode is good in air inlet consistency, the matching performance is poor, the intermediate air inlet mode is usually poor in air inlet consistency, the matching performance is good, the matching of multiple vehicle types can be met, and the non-road engine is particularly matched by basically adopting the intermediate air inlet mode.
The design thought of the air inlet pipe structure which is better in the prior art is generally embodied as follows: the air is introduced from the middle, the matching performance is good, and the uniformity of the flow coefficient and the vortex ratio of each cylinder is good. The existing air inlet pipe structure mainly considers the feasibility of pipeline arrangement or simply considers the air inlet flow uniformity of each cylinder of the air inlet pipe, does not consider the uniformity of the vortex ratio of each cylinder, and even if the uniformity of the vortex ratio is considered, the uniformity of the vortex ratio is not considered by combining different air passages, which may cause that some cylinders are inferior in emission, the emission does not reach the standard, the performance deviation of each cylinder is larger, and the engine vibration is larger.
The air inlet pipe structure of the existing engine has the following problems:
1. In order to ensure the uniformity of the air inlet flow coefficient and the vortex ratio, an end face air inlet mode is adopted, namely an air inlet main pipe port is arranged at the outer sides of two air inlet channels, and the structure has poor matching property;
2. In order to ensure the matching of different whole vehicles, a middle air inlet mode is adopted, namely an air inlet main pipe port is arranged between two cylinder air passages at the outermost sides of the front end and the rear end, but the whole air inlet pipe is simple in structure, the air inlet main pipe is usually integrated, the difference of air flow conditions in the air inlet passages of all cylinders is large, and the structure is generally poor in air inlet flow coefficient and vortex ratio uniformity;
3. the structure of the air inlet connecting pipe is generally designed by only considering the possibility of pipeline arrangement and the uniformity of air inlet flow, and is not combined with the vortex rotation direction of the air passage, so that the air inlet connecting pipe is at most only designed by considering the possibility of pipeline arrangement and the uniformity of air inlet flow, and the uniformity of the vortex ratio of each cylinder is not basically considered.
Such as a diesel engine air intake pipe, as applied by the Anhui full diesel power Co., ltd, with application number CN201020519088.5, as shown in FIG. 1. The design idea of the diesel engine air inlet pipe is as follows: an EGR waste gas installation seat 11 is installed on the air inlet connecting pipe 1, so that EGR waste gas can be fully mixed with fresh air before entering the air inlet main pipe 1, and the mixing uniformity is ensured. An independent air inlet main pipe structure is designed, the inner diameter of the air inlet main pipe 1 is 50-52mm, the pressure stabilizing effect is achieved, and the uniformity of air inflow of each cylinder is guaranteed. However, the diesel engine intake pipe simply considers the EGR exhaust gas mount 11 and the intake manifold 1, and the structure of the pipe is not described in detail, and the guiding of the pipe is not designed in detail in combination with the swirl direction of the intake pipe, that is, the uniformity of the swirl ratio is not considered.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide an air inlet pipe structure of an engine, wherein an upper air inlet main pipe and a lower air inlet main pipe with different levels are respectively arranged at the front and rear of an air inlet and a neck part of the air inlet pipe, so that the air flow conditions in air inlet channels of all cylinders are similar, and the uniformity of flow coefficients and vortex ratios of all cylinders is ensured.
In order to achieve the above object, the present invention provides an intake pipe structure of an engine, including an intake pipe body including an intake port, a neck portion, an upper intake manifold, and a lower intake manifold. The air inlet is arranged at the upper part of the air inlet pipe body; the neck is arranged at the lower part of the air inlet; an upper intake manifold is disposed on a rear side of the neck, the upper intake manifold including a plurality of first flanges; a lower inlet manifold disposed on a front side of the neck, the lower inlet manifold including a plurality of second flanges; wherein the upper intake manifold is positioned at a level higher than the lower intake manifold.
In a preferred embodiment, the first plurality of flanges and the second plurality of flanges are each sized and shaped and the first plurality of flanges and the second plurality of flanges are positioned in the same mounting plane and in the same horizontal position.
In a preferred embodiment, the number of the plurality of first flanges and the number of the plurality of second flanges are the same.
In a preferred embodiment, the number of the plurality of first flanges and the plurality of second flanges is different.
In a preferred embodiment, the upper intake manifold further comprises a curved intake manifold that is engaged between the bottom plane of the upper intake manifold and the first flange.
In a preferred embodiment, the angle between the normal direction of the bottom plane of the upper intake manifold and the normal direction of the mounting surface of the first flange is 90 °.
In a preferred embodiment, the rear side wall of the bent air inlet manifold, which is opposite to the first flange, is provided with an arc guide surface, and an included angle between connecting lines between two ends of the arc guide surface and the circle center of the arc guide surface is between 45 and 90 degrees.
In a preferred embodiment, the opening of the air inlet is arranged upwards.
In a preferred embodiment, the height of the neck is greater than or equal to 50mm.
In a preferred embodiment, the intake pipe structure of the engine further includes a heater provided at the intake port.
Compared with the prior art, the air inlet pipe structure of the engine has the following beneficial effects: the inlet position of the air inlet pipe structure can be flexibly adjusted, the air inlet pipe structure can adapt to various vehicle type structures, and the air inlet pipe structure is good in matching performance. The air inlet pipe structure fully considers the air inlet conditions of the air inlet pipes at different cylinder positions, designs the air inlet manifold structure with different horizontal heights, makes the air flow conditions in the air inlet pipes of all cylinders similar, and further ensures the uniformity of the flow coefficient and the vortex ratio of all cylinders.
Drawings
Fig. 1 is a schematic structural view of an intake pipe structure according to an existing embodiment;
fig. 2 is an installation schematic view of an intake pipe structure according to an embodiment of the present invention;
Fig. 3 is a perspective view schematically showing an intake pipe structure according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of an intake pipe structure according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a curved intake manifold according to an embodiment of the invention.
The main reference numerals illustrate:
1-heater, 2-intake pipe body, 21-air inlet, 22-neck, 23-upper side intake manifold, 24-lower side intake manifold, 25-curved intake manifold, 251-circular arc guide surface, 252-bottom plane, 26-first flange, 27-second flange, 3-cylinder cap, 31-first cylinder air passage, 32-sixth cylinder air passage.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 2 to 4, an intake pipe structure of an engine according to a preferred embodiment of the present invention includes an intake pipe body 2 including an intake port 21, a neck portion 22, an upper side intake manifold 23, and a lower side intake manifold 24. The intake port 21 is provided at an upper portion of the intake pipe body 2. The neck 22 is provided at a lower portion of the air inlet 21. An upper intake manifold 23 is disposed on the rear side of the neck 22, the upper intake manifold 23 including a plurality of first flanges 26. A lower intake manifold 24 is disposed on the front side of the neck 22, the lower intake manifold 24 including a plurality of second flanges 27. Wherein the upper intake manifold 23 is located at a higher level than the lower intake manifold 24.
Referring to fig. 3 and 4, in some embodiments, the first flanges 26 and the second flanges 27 are shaped and sized identically, and the first flanges 26 and the second flanges 27 are located in the same mounting plane and at the same horizontal position. And the number of the plurality of first flanges 26 and the plurality of second flanges 27 may be the same or different. That is, the intake port 21 and the neck 22 may be provided in principle at any position between the connecting flanges connecting the first cylinder air passage and the sixth cylinder air passage. The air inlet 21 and the neck 22 of the present embodiment are just disposed in the middle, that is, the number of the first flanges 26 and the second flanges 27 are equal, but the present invention is not limited thereto, and the number of the first flanges 26 and the second flanges 27 may be unequal, for example, two first flanges 26, four second flanges 27, etc.
As shown in fig. 5, in some embodiments, the upper side intake manifold 23 further includes a curved intake manifold 25 that is engaged between the bottom planar surface 252 of the upper side intake manifold 23 and the first flange 26. The normal direction of the bottom plane 252 of the upper intake manifold 23 is at an angle of 90 ° to the normal direction of the mounting surface of the first flange 26. The rear side wall of the bent air inlet manifold 25, which is opposite to the first flange 26, is provided with an arc guide surface 251, and an included angle between connecting lines between two ends of the arc guide surface 251 and the center of the arc guide surface 251 is between 45 and 90 degrees.
In some embodiments, the opening of the air inlet 21 is disposed upward. The height h of the neck 22 is preferably 50mm or more, which makes the flow coefficient and the swirl ratio more excellent than the uniformity.
Referring again to fig. 2, in some embodiments, the intake pipe structure of the engine further includes a heater disposed at the intake port 21.
In some embodiments, the upper and lower intake manifolds 23, 24 are positioned immediately before the neck 22 and after the neck 22, depending on the direction of swirl generated by the intake ports on the cylinder head, which may be used in conjunction with different intake port configurations. Referring to fig. 2, the swirl direction generated by the intake port of the cylinder head of the present embodiment is a clockwise swirl, so the upper intake manifold 23 of the present embodiment is disposed on the rear side. On the contrary, if the swirl rotation direction of the swirl generated by the intake duct of the cylinder head is counterclockwise swirl, the upper intake manifold 23 should be disposed at the front side.
In some embodiments, the present example illustrates only an example of a six-cylinder engine, but the present invention is not limited to only a six-cylinder engine.
In summary, the air inlet pipe structure of the engine has the following beneficial effects: the inlet position of the air inlet pipe structure can be flexibly adjusted, the air inlet pipe structure can adapt to various vehicle type structures, and the air inlet pipe structure is good in matching performance. The air inlet pipe structure fully considers the air inlet conditions of the air inlet pipes at different cylinder positions, designs the air inlet manifold structure with different horizontal heights, makes the air flow conditions in the air inlet pipes of all cylinders similar, and further ensures the uniformity of the flow coefficient and the vortex ratio of all cylinders. The structural design of the air inlet pipe is determined according to the rotation direction of vortex generated by the air inlet pipe on the cylinder cover, so that the uniformity of flow coefficient and vortex ratio of each cylinder can be still ensured according to different air inlet pipe structures.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (1)
1. The utility model provides an intake pipe structure of engine which characterized in that includes the intake pipe body, it includes:
an air inlet provided at an upper portion of the intake pipe body;
A neck portion provided at a lower portion of the air inlet;
An upper intake manifold disposed on a rear side of the neck, the upper intake manifold including a plurality of first flanges; and
A lower side intake manifold disposed on a front side of the neck, the lower side intake manifold including a plurality of second flanges;
Wherein the upper side intake manifold is higher in horizontal position than the lower side intake manifold;
wherein the first flanges and the second flanges are in the same shape and size, and the first flanges and the second flanges are positioned in the same mounting plane and in the same horizontal position;
Wherein the number of the plurality of first flanges and the plurality of second flanges is the same;
Wherein the upper side intake manifold further comprises a curved intake manifold that is joined between a bottom plane of the upper side intake manifold and the first flange;
Wherein the angle between the normal direction of the bottom plane of the upper side intake manifold and the normal direction of the mounting surface of the first flange is 90 degrees;
The curved intake manifold is opposite to the rear side wall of the first flange and is provided with an arc guide surface, and an included angle between connecting lines between two ends of the arc guide surface and the circle center of the arc guide surface is between 45 and 90 degrees;
wherein the opening of the air inlet is upward;
wherein the height of the neck is greater than or equal to 50mm;
the air inlet pipe structure further comprises a heater which is arranged at the air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010765940.5A CN111749822B (en) | 2020-08-03 | 2020-08-03 | Air inlet pipe structure of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010765940.5A CN111749822B (en) | 2020-08-03 | 2020-08-03 | Air inlet pipe structure of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111749822A CN111749822A (en) | 2020-10-09 |
| CN111749822B true CN111749822B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010765940.5A Active CN111749822B (en) | 2020-08-03 | 2020-08-03 | Air inlet pipe structure of engine |
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| CN (1) | CN111749822B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010038106A (en) * | 2008-08-07 | 2010-02-18 | Toyota Motor Corp | Intake manifold for internal combustion engine, and intake passage structure for internal combustion engine |
| CN102207027A (en) * | 2010-10-25 | 2011-10-05 | 浙江吉利汽车研究院有限公司 | Air inlet vortex adjusting structure of diesel engine |
| CN104179609A (en) * | 2013-05-21 | 2014-12-03 | 重庆长安汽车股份有限公司 | Air inlet manifold assembly with variable air inlet cross section |
| CN104564453A (en) * | 2015-01-08 | 2015-04-29 | 广西玉柴机器股份有限公司 | Intake manifold of EGR engine |
| JP2016114013A (en) * | 2014-12-17 | 2016-06-23 | 三菱自動車工業株式会社 | Intake port heat insulation structure of internal combustion engine |
| CN109763901A (en) * | 2019-03-29 | 2019-05-17 | 江西腾勒动力有限公司 | A kind of diesel engine intake manifold structure |
| CN210152810U (en) * | 2019-12-24 | 2020-03-17 | 潍柴动力股份有限公司 | Air inlet system of natural gas engine |
| CN212296672U (en) * | 2020-08-03 | 2021-01-05 | 广西玉柴机器股份有限公司 | Air inlet pipe structure of engine |
-
2020
- 2020-08-03 CN CN202010765940.5A patent/CN111749822B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010038106A (en) * | 2008-08-07 | 2010-02-18 | Toyota Motor Corp | Intake manifold for internal combustion engine, and intake passage structure for internal combustion engine |
| CN102207027A (en) * | 2010-10-25 | 2011-10-05 | 浙江吉利汽车研究院有限公司 | Air inlet vortex adjusting structure of diesel engine |
| CN104179609A (en) * | 2013-05-21 | 2014-12-03 | 重庆长安汽车股份有限公司 | Air inlet manifold assembly with variable air inlet cross section |
| JP2016114013A (en) * | 2014-12-17 | 2016-06-23 | 三菱自動車工業株式会社 | Intake port heat insulation structure of internal combustion engine |
| CN104564453A (en) * | 2015-01-08 | 2015-04-29 | 广西玉柴机器股份有限公司 | Intake manifold of EGR engine |
| CN109763901A (en) * | 2019-03-29 | 2019-05-17 | 江西腾勒动力有限公司 | A kind of diesel engine intake manifold structure |
| CN210152810U (en) * | 2019-12-24 | 2020-03-17 | 潍柴动力股份有限公司 | Air inlet system of natural gas engine |
| CN212296672U (en) * | 2020-08-03 | 2021-01-05 | 广西玉柴机器股份有限公司 | Air inlet pipe structure of engine |
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| Publication number | Publication date |
|---|---|
| CN111749822A (en) | 2020-10-09 |
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