CN113818977B - Engine air inlet pipe - Google Patents
Engine air inlet pipe Download PDFInfo
- Publication number
- CN113818977B CN113818977B CN202111155767.8A CN202111155767A CN113818977B CN 113818977 B CN113818977 B CN 113818977B CN 202111155767 A CN202111155767 A CN 202111155767A CN 113818977 B CN113818977 B CN 113818977B
- Authority
- CN
- China
- Prior art keywords
- air inlet
- pipe
- main pipe
- inlet main
- 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.)
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Links
- 238000010992 reflux Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 102200160521 rs199476301 Human genes 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
- 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
-
- 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)
- Characterised By The Charging Evacuation (AREA)
Abstract
The invention discloses an engine air inlet pipe, which comprises an air inlet connecting pipe, an air inlet main pipe and an air inlet channel; the air inlet connecting pipe is combined on the upper right side of the air inlet main pipe; the air inlet connecting pipes are distributed on the left side of the air inlet main pipe; the horizontal distance between the left inner wall of the air inlet connecting pipe and the inner wall of the air inlet main pipe is L1; the horizontal distance between the left inner wall and the right inner wall of the air inlet main pipe is L2; then 0.ltoreq.L1/L2 < 0.2. The invention has the advantages of uniform air intake and capability of obviously reducing the phenomena of reflux, vortex flow and the like in the pipe.
Description
Technical Field
The invention relates to the technical field of engine air inlet pipes, in particular to an engine air inlet pipe.
Background
The intake pipe is a pipe for introducing air required for combustion in the internal combustion engine into the engine. In design, the air inlet pipe structure with different shapes, lengths and sectional areas is generally required to be designed according to different engine requirements so as to meet the requirements of different engines; for multi-cylinder high-power engines, the design needs to consider the phenomena of air intake inertia generated under high air flow and large ventilation volume, such as backflow, vortex and the like, which are particularly easy to generate, so as to reduce flow loss and pressure fluctuation, and meet the design requirements of high speed, high power, economy, emission performance and the like. At present, although an air inlet pipe for a multi-cylinder high-power engine is also disclosed, the air inlet pipe is difficult to overcome the problems of air inlet inertia and larger phenomena such as in-pipe backflow and vortex at present under the condition of large ventilation amount, and if the problems cannot be effectively solved, the overall combustion performance of the multi-cylinder high-power engine is not beneficial to improvement. Meanwhile, the integration level of the current engine is higher and higher, and the layout space of the engine is very limited, so that in actual assembly, offset adjustment is required to be carried out on an air inlet connecting pipe of an air inlet pipe due to the fixed distribution of other parts, and more severe requirements are put forward on the overall structural design of the air inlet pipe in order to ensure that the related air inlet requirements are met and the related performance indexes are met.
Disclosure of Invention
The invention provides the engine air inlet pipe which is uniform in air inlet and good in effect aiming at the technical problems.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an engine air inlet pipe comprises an air inlet connecting pipe, an air inlet main pipe and an air inlet channel; the air inlet connecting pipe is combined on the upper right side of the air inlet main pipe; the air inlet connecting pipes are distributed on the left side of the air inlet main pipe; the horizontal distance between the left inner wall of the air inlet connecting pipe and the inner wall of the air inlet main pipe is L1; the horizontal distance between the left inner wall and the right inner wall of the air inlet main pipe is L2; then 0.ltoreq.L1/L2 < 0.2.
Further, the lower part of the air inlet connecting pipe is connected with the bottom surface of the air inlet main pipe by adopting an inclined plane; the inclined plane and an extension line of the bottom surface of the air inlet main pipe form an included angle a; the included angle a is 40-60 degrees.
Further, the included angle a is 45 degrees.
Further, 6 air inlets are formed and evenly distributed along the long side of the air inlet main pipe.
Further, the longest side of the inner cavity of the air inlet connecting pipe is a; the long side is parallel to the long side of the air inlet main pipe; the distance between two adjacent air inlets is b; a > b.
Further, the L1/l2=0.1.
Further, the intake nipple is joined to the right upper middle portion of the intake manifold.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the air inlet connecting pipe is directly combined on the upper right side of the air inlet main pipe, then L1/L2 is set to be more than or equal to 0 and less than or equal to 0.2, an inclined plane is set to be between 40 and 60 degrees, and meanwhile, the air inlet connecting pipe is limited by adopting a & gtb and the like, so that aiming at the requirement of high-flow air flow required by a high-power multi-cylinder engine, the problems of air inlet inertia in a storage can be ensured, the phenomena of in-pipe backflow, vortex and the like are obviously reduced, the air inlet uniformity and smoothness are obviously improved, and the integral combustion efficiency of each cylinder is improved. By adopting the structure, even if the distribution position of the air inlet connecting pipe is shifted by approximately a/2 along the long side of the air inlet main pipe, the related index requirement can be still met, the application range is wider, and the reliability is good.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a schematic view of the upper side perspective of the present invention;
FIG. 3 is a schematic view of the lower side perspective of the present invention;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is a schematic perspective view of the present invention;
FIG. 6 is a cross-sectional view showing the effect of air flow simulation of a conventional air intake pipe;
FIG. 7 is a cross-sectional view showing the effect of air flow simulation of the air intake pipe of the present invention in the embodiment;
fig. 8 is a turbine deviation test comparison of a conventional intake pipe and an intake pipe of the present invention in a specific embodiment.
Detailed Description
As shown in fig. 1 to 8, an engine intake pipe comprises an intake pipe 3, an intake manifold 1 and an intake duct 2; the air inlet connecting pipe 3 is directly combined with the middle part of the right upper side of the air inlet main pipe 1, namely the left lower end of the air inlet connecting pipe 3 is combined with the right upper end of the air inlet main pipe 1; the lower part of the air inlet connecting pipe 3 (namely the lower part on the middle right side) is connected with the bottom surface of the air inlet main pipe 1 by adopting an inclined plane 4; the inclined plane 4 and an extension line of the bottom surface of the air inlet main pipe 1 form an included angle < a >; the included angle a is 40-60 degrees, and 45 degrees are preferably selected in the embodiment. The air inlet connecting pipes 3 are distributed on the left side of the air inlet main pipe 1; the number of the air inlets 3 is 6, and the air inlets are uniformly distributed along the long side of the air inlet main pipe 1; the distance between two adjacent air inlets 3 is b. The horizontal distance between the left inner wall of the air inlet connecting pipe 3 and the inner wall of the air inlet main pipe is L1; the horizontal distance between the left inner wall and the right inner wall of the air inlet main pipe is L2; then 0.ltoreq.L1/L2 < 0.2, and L1/L2=0.1 may be used in this example. The longest side of the inner cavity of the air inlet connecting pipe 3 is a; the long side is parallel to the long side of the air inlet main pipe; and under the condition that a is more than b, the phenomena such as air inlet inertia and the like are effectively reduced.
The air inlet pipe of the embodiment is applied to a diesel engine K15N model of a Yuchai diesel engine, in the design, the distribution position of the air inlet connecting pipe 3 is required to be shifted by approximately a/2 along the long side of the air inlet main pipe, and adaptive abdication is carried out, but even if the shifting is approximately a/2, the expected beneficial effect can still be met, if the air inlet pipe is combined at the middle position of the right upper side of the air inlet main pipe 1, the natural effect is better, and the related simulation and test results under the structure of the embodiment are shown in fig. 7-8. As can be seen from fig. 6, the air flow of the conventional air inlet pipe hits the bottom of the air inlet manifold, and forms a larger backflow area, so that the air flow cannot smoothly enter the air inlet channel. As shown in fig. 7, it can be seen from the figure that the air flow of the air inlet pipe of the embodiment transits from the flow in the vertical direction to the flow in the horizontal direction, the backflow area is obviously reduced during the transition, and the air flow can smoothly enter the air inlet pipe. As shown in fig. 8, the turbine deviation degree of the conventional air inlet pipe and the air inlet pipe of the embodiment is compared, and the abscissa in the figure represents the test value corresponding to the outlets of the 6 air inlet manifolds respectively connected with the 6 air inlet pipes, and as can be seen from the figure, the deviation of the vortex ratio among cylinders of the conventional 6-cylinder air inlet pipe is extremely different (such as a numerical value before optimization), and the maximum deviation can reach 8.17%; the eddy ratio deviation among the cylinders of the 6-cylinder air inlet pipe is obviously reduced, the highest value is reduced from 8.17% of the traditional air inlet pipe to 2.4%, the deviation degree is obviously reduced, and the reliability of the air inlet pipe is effectively improved.
Claims (3)
1. An engine intake pipe, characterized in that: comprises an air inlet connecting pipe, an air inlet main pipe and an air inlet channel; the air inlet connecting pipe is combined on the upper right side of the air inlet main pipe; the air inlet connecting pipes are distributed on the left side of the air inlet main pipe; the horizontal distance between the left inner wall of the air inlet connecting pipe and the inner wall of the air inlet main pipe is L1; the horizontal distance between the left inner wall and the right inner wall of the air inlet main pipe is L2; then L1/L2 is more than or equal to 0 and less than 0.2;
the lower part of the air inlet connecting pipe is connected with the bottom surface of the air inlet main pipe by adopting an inclined plane; the inclined plane and an extension line of the bottom surface of the air inlet main pipe form an included angle a; the included angle a is between 40 and 60 degrees;
the number of the air inlets is 6, and the air inlets are uniformly distributed along the long side of the air inlet main pipe;
the longest side of the inner cavity of the air inlet connecting pipe is a; the long side is parallel to the long side of the air inlet main pipe; the distance between two adjacent air inlets is b; a > b;
the air inlet connecting pipe is combined with the middle part of the right upper side of the air inlet main pipe.
2. An engine air intake according to claim 1, wherein: the included angle a is 45 degrees.
3. An engine air intake according to claim 1, wherein: the L1/l2=0.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111155767.8A CN113818977B (en) | 2021-09-29 | 2021-09-29 | Engine air inlet pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111155767.8A CN113818977B (en) | 2021-09-29 | 2021-09-29 | Engine air inlet pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113818977A CN113818977A (en) | 2021-12-21 |
| CN113818977B true CN113818977B (en) | 2024-04-05 |
Family
ID=78916048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111155767.8A Active CN113818977B (en) | 2021-09-29 | 2021-09-29 | Engine air inlet pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113818977B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202250501U (en) * | 2011-08-25 | 2012-05-30 | 力帆实业(集团)股份有限公司 | Intake manifold for automobile engine |
| EP3361083A2 (en) * | 2017-02-09 | 2018-08-15 | Cummins, Inc. | Air intake system for internal combustion engine |
| CN216111067U (en) * | 2021-09-29 | 2022-03-22 | 广西玉柴机器股份有限公司 | Air inlet pipe of engine |
-
2021
- 2021-09-29 CN CN202111155767.8A patent/CN113818977B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202250501U (en) * | 2011-08-25 | 2012-05-30 | 力帆实业(集团)股份有限公司 | Intake manifold for automobile engine |
| EP3361083A2 (en) * | 2017-02-09 | 2018-08-15 | Cummins, Inc. | Air intake system for internal combustion engine |
| CN216111067U (en) * | 2021-09-29 | 2022-03-22 | 广西玉柴机器股份有限公司 | Air inlet pipe of engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113818977A (en) | 2021-12-21 |
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