CN220487746U - Air inlet structure for plastic air inlet manifold of dual-purpose fuel engine - Google Patents
Air inlet structure for plastic air inlet manifold of dual-purpose fuel engine Download PDFInfo
- Publication number
- CN220487746U CN220487746U CN202322002559.5U CN202322002559U CN220487746U CN 220487746 U CN220487746 U CN 220487746U CN 202322002559 U CN202322002559 U CN 202322002559U CN 220487746 U CN220487746 U CN 220487746U
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- China
- Prior art keywords
- air inlet
- branch pipe
- inlet branch
- copper nut
- dual
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- 239000004033 plastic Substances 0.000 title claims abstract description 23
- 229920003023 plastic Polymers 0.000 title claims abstract description 23
- 239000000446 fuel Substances 0.000 title claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 39
- 229910052802 copper Inorganic materials 0.000 claims description 39
- 239000010949 copper Substances 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 30
- 239000003345 natural gas Substances 0.000 description 15
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 210000002445 nipple Anatomy 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
An air inlet structure for a plastic air inlet manifold of a dual-purpose fuel engine belongs to the technical field of plastic air inlet manifolds of automobile engines, and solves the problems that the prior art has larger damage to the air inlet manifold, poor reliability and higher strength when a vehicle is refitted by CNG.
Description
Technical Field
The utility model belongs to the technical field of plastic air inlet manifolds of automobile engines, and particularly relates to an air inlet structure of a plastic air inlet manifold of a dual-purpose fuel engine.
Background
CNG (compressed natural gas) burning vehicles have better economy and lower emissions than gasoline burning vehicles and are now finding more and more applications. Because the cost of plastic intake manifold modification is lower than that of the cylinder cover, the prior art generally integrates a boss on the plastic intake manifold body when the vehicle is refitted by CNG, a threaded hole is formed in the boss, the metal CNG injection pipe joint is coated with sealant and then screwed into the formed threaded hole, and the technical scheme has larger damage to the plastic intake manifold and poor reliability. In order to solve the problem, the utility model with the application number of CN201520417932.6 discloses a plastic air inlet manifold for a CNG engine, which comprises an air inlet manifold body and a CNG injection pipe joint, wherein a rotary welding seat is arranged on the air inlet manifold body, CNG injection holes are formed in the middle of the rotary welding seat, one end of the CNG injection pipe joint is welded on the rotary welding seat through rotation, a CNG injection pipe joint middle channel is communicated with an air passage of the air inlet manifold body through the CNG injection holes, and the other end of the CNG injection pipe joint is sleeved with a rubber plug which is in interference fit with the CNG injection pipe joint. The utility model simplifies the working procedures when refitting CNG equipment and improves the refitting reliability. However, as can be seen from the drawings of the utility model, the plastic intake manifold body is provided with the rotary welding seat integrated with the plastic intake manifold body, and the plastic CNG injection pipe joint is welded on the rotary welding seat, so that the CNG injection pipe joint of the utility model is indirectly integrated with the plastic intake manifold body, has lower strength, is only suitable for the requirement of vehicle CNG refitting, has a fixed and non-detachable structure after refitting, and is not suitable for the use requirement of the plastic intake manifold of the dual-purpose fuel engine.
The utility model with the application number of CN201520785129.8 discloses an intake manifold assembly for a dual-purpose fuel engine, which comprises an intake manifold branch pipe, an air outlet and a natural gas intake pipe joint mouth, wherein the intake manifold branch pipe is provided with an air outlet, and a natural gas intake hose for conveying natural gas to the dual-purpose fuel engine is connected with the natural gas intake pipe joint mouth, the natural gas intake pipe joint mouth is hermetically arranged on the wall of an air passage of the intake manifold branch pipe, and a passage is arranged on the natural gas intake pipe joint mouth. When the natural gas inlet pipe joint is arranged, the inlet manifold is convenient to connect with the natural gas inlet hose, and the natural gas inlet pipe joint is simple in structure, convenient to use, trouble-saving and labor-saving. However, as is apparent from the description of the present utility model, when the natural gas intake pipe nipple is provided, the natural gas intake pipe nipple and the intake manifold branch pipe are integrally injection-molded, so that although the process is convenient, the mass production is convenient, the connection firmness and the tightness between the natural gas intake pipe nipple and the intake manifold branch pipe are improved, but a new mold is required, the production cost is increased, and the natural gas intake pipe nipple and the intake manifold branch pipe are integrally injection-molded, and the strength of the natural gas intake pipe nipple is low.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides the air inlet structure for the plastic air inlet manifold of the dual-purpose fuel engine, which has the advantages of high strength, good sealing performance and no need of adopting a new die, and the modified structure is suitable for the use requirement of the plastic air inlet manifold of the dual-purpose fuel engine.
The technical scheme includes that the air inlet manifold upper piece is provided with 4 air inlet branch pipes, wherein the air inlet manifold upper piece is provided with a first air inlet branch pipe, a second air inlet branch pipe, a third air inlet branch pipe and a fourth air inlet branch pipe from right to left, support bosses are welded at the lower ends of the outer walls of the first air inlet branch pipe, the second air inlet branch pipe, the third air inlet branch pipe and the fourth air inlet branch pipe respectively, copper nut mounting holes communicated with air passages are machined after each support boss is welded with the outer wall of the corresponding air inlet branch pipe respectively, and copper nuts are inserted into each copper nut mounting hole in a hot inserting mode.
An air inlet pipe joint is connected in the internal threaded hole of each copper nut in a threaded mode.
A seal screw is mounted in the internally threaded bore of each copper nut.
The left side of supporting boss is the faying face with the outer wall of air inlet branch, the right flank of supporting boss is the installation face of copper nut still processing has the flash groove supporting the right flank of boss, after copper nut hot plug assembly, form the flash chamber between the left end face of copper nut and supporting boss and air inlet branch.
The diameter of the copper nut mounting hole is 9.5-10 mm.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The utility model adopts the supporting boss with the conformal joint surface with the outer wall of the air inlet branch pipe and the copper nut mounting surface, and the copper nut is inserted and assembled in each copper nut mounting hole, thereby improving the mounting strength and good sealing property of the air inlet pipe joint, improving the reliability of the air inlet structure, avoiding adopting a new die when the vehicle is refitted with CNG, and reducing the production cost.
(2) When the CNG engine intake manifold is used, an intake pipe joint is connected in an internal threaded hole of each copper nut in a threaded manner, and is connected with an external intake hose through the intake pipe joint; when the fuel engine air inlet manifold is switched to, the air inlet pipe joint is removed and replaced by a sealing screw, and the inner hole of the copper nut is sealed by the sealing screw, so that the use requirement of the plastic air inlet manifold of the dual-purpose fuel engine is met.
(3) According to the utility model, the overflow groove for overflowing the sizing material during hot-plug assembly of the copper nut is processed on the right side surface of the supporting boss, so that the overflowing sizing material during hot-plug assembly of the copper nut can be prevented from flowing onto the mounting surface of the copper nut, and the mounting precision of related parts is ensured; after the copper nut is hot-plugged and assembled, a flash cavity is formed between the left end face of the copper nut and the supporting boss as well as the air inlet branch pipe, so that overflowing glue stock can be prevented from flowing into the inner wall of the air inlet branch pipe during the hot-plug and assembly of the copper nut, the overflowing glue stock is prevented from being brought into the air passage to influence the working performance of the engine, and the reliability of the air inlet structure is further improved.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a section A-A of FIG. 1;
FIG. 3 is a section B-B of FIG. 1;
fig. 4 is a partial enlarged view at C of fig. 3.
In the figure:
1. an upper plate of the air inlet manifold,
1-1, a first air inlet branch pipe, 1-2, a second air inlet branch pipe,
1-3, a third air inlet branch pipe, 1-4, a fourth air inlet branch pipe,
2. the boss is supported by the support,
2-1, a material overflow groove, 2-2, a mounting surface, 2-3, a bonding surface,
3. a copper nut is used for the production of the copper nut,
4. an air inlet pipe joint,
5. a flash cavity.
Description of the embodiments
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-3, the technical scheme adopted by the utility model comprises an air inlet manifold upper sheet 1, 4 air inlet branch pipes are arranged on the air inlet manifold upper sheet 1, a first air inlet branch pipe 1-1, a second air inlet branch pipe 1-2, a third air inlet branch pipe 1-3 and a fourth air inlet branch pipe 1-4 are respectively arranged from right to left, a supporting boss 2 is respectively welded at the lower ends of the outer walls of the first air inlet branch pipe 1-1, the second air inlet branch pipe 1-2, the third air inlet branch pipe 1-3 and the fourth air inlet branch pipe 1-4, copper nut mounting holes with the diameters of 9.5 mm-10 mm are respectively processed on the outer walls of each supporting boss 2 and the corresponding air inlet branch pipe after being welded, copper nuts 3 are respectively assembled in the copper nut mounting holes in a hot inserting way, further, the left side surface of the supporting boss 2 is a joint surface 2-2 of the copper nuts 3 is a joint surface 2-2 which is in a shape along with the outer wall of the air inlet branch pipe, when the right side surface of the supporting boss 2 is also provided with copper nuts 3 is used for being welded on the copper nuts 3, and the air inlet pipe 3 is connected with the air inlet pipe 4 through a threaded hole in an air inlet pipe 4, and a threaded hole is formed in the air inlet pipe 4; when switching to the fuel engine intake manifold, the intake pipe joint 4 is removed, the internal threaded hole of each copper nut 3 is replaced with a sealing screw, and the internal hole of the copper nut 3 is sealed by the sealing screw.
Claims (5)
1. The utility model provides an air inlet structure for dual-purpose fuel engine plastics air intake manifold, includes air intake manifold upper plate (1), is equipped with 4 air inlet branch pipes on air intake manifold upper plate (1), is first air inlet branch pipe (1-1) respectively from right to left, second air inlet branch pipe (1-2), third air inlet branch pipe (1-3) and fourth air inlet branch pipe (1-4), characterized in that in first air inlet branch pipe (1-1), second air inlet branch pipe (1-2), third air inlet branch pipe (1-3) and fourth air inlet branch pipe (1-4)'s outer wall lower extreme has welded support boss (2) respectively, has with the communicating copper nut mounting hole of air flue after the outer wall welding of every support boss (2) and corresponding air inlet branch pipe respectively to hot plug is equipped with copper nut (3) in every copper nut mounting hole.
2. An air intake structure for a plastic air intake manifold of a dual-purpose fuel engine according to claim 1, characterized in that an air intake pipe joint (4) is screwed in an internally threaded hole of each copper nut (3).
3. An air intake structure for a dual fuel engine plastic intake manifold according to claim 1, characterized in that a sealing screw is mounted in an internally threaded hole of each copper nut (3).
4. An air inlet structure for a plastic air inlet manifold of a dual-purpose fuel engine according to claim 1, 2 or 3, characterized in that the left side surface of the supporting boss (2) is a joint surface (2-3) which is shaped along with the outer wall of an air inlet branch pipe, the right side surface of the supporting boss (2) is a mounting surface (2-2) of a copper nut (3), a flash groove (2-1) is further processed on the right side surface of the supporting boss (2), and after the copper nut (3) is assembled by hot plug, a flash cavity (5) is formed between the left end surface of the copper nut (3) and the supporting boss (2) and the air inlet branch pipe.
5. An air intake structure for a dual fuel engine plastic intake manifold as claimed in claim 1, 2 or 3, wherein the copper nut mounting holes have a diameter of 9.5mm to 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322002559.5U CN220487746U (en) | 2023-07-28 | 2023-07-28 | Air inlet structure for plastic air inlet manifold of dual-purpose fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322002559.5U CN220487746U (en) | 2023-07-28 | 2023-07-28 | Air inlet structure for plastic air inlet manifold of dual-purpose fuel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220487746U true CN220487746U (en) | 2024-02-13 |
Family
ID=89827674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322002559.5U Active CN220487746U (en) | 2023-07-28 | 2023-07-28 | Air inlet structure for plastic air inlet manifold of dual-purpose fuel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220487746U (en) |
-
2023
- 2023-07-28 CN CN202322002559.5U patent/CN220487746U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |