CN219672752U - High tumble ratio PFI engine air inlet structure - Google Patents
High tumble ratio PFI engine air inlet structure Download PDFInfo
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- CN219672752U CN219672752U CN202320663358.7U CN202320663358U CN219672752U CN 219672752 U CN219672752 U CN 219672752U CN 202320663358 U CN202320663358 U CN 202320663358U CN 219672752 U CN219672752 U CN 219672752U
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- air
- throat
- air inlet
- air passage
- inlet
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 34
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 241000251468 Actinopterygii Species 0.000 abstract description 4
- 210000001015 abdomen Anatomy 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to the field of automobile engines and discloses a high-tumble ratio PFI engine air inlet channel structure which comprises an air inlet channel main body, wherein an air channel throat opening is fixedly formed in one end of the air inlet channel main body, an air channel inlet is fixedly formed in one end, far away from the air channel throat opening, of the air inlet channel main body, an air valve guide pipe boss is fixedly arranged at the top of the air channel throat opening, and an oil sprayer mounting hole is fixedly formed in the middle of the air inlet channel main body. In the utility model, the lower side of the air inlet channel is connected with the air channel throat through the fish belly shape, and the shape has a flow guiding function. After the air flow enters the fish-belly-shaped air inlet channel, the air flow is accelerated at the throat through the optimized included angle between the center line of the air inlet valve and the center line of the combustion chamber, the included angle between the throat and the tangential direction of the curved surface of the connected air channel and the shape of the throat, so that high tumble can be formed in the combustion chamber, and the tumble ratio is improved.
Description
Technical Field
The utility model relates to the field of automobile engines, in particular to an air inlet channel structure of a PFI engine with high tumble ratio.
Background
Along with the increasingly outstanding energy and environmental crisis, the requirements on the economy, the environmental protection and the like of the automobile engine are higher and higher, the excellent engine air inlet channel design can obviously improve combustion, the purposes of reducing oil consumption and emission are achieved, and the flow coefficient is reduced by improving the tumble ratio of the air inlet channel in most of current air inlet schemes. The utility model improves the tumble ratio of the air inlet channel of the existing engine and ensures the flow coefficient, thereby achieving the effects of high tumble ratio and high flow coefficient ratio.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides an air inlet structure of a high tumble ratio PFI engine, wherein the lower side of an air inlet is connected with the throat of an air passage through a fish belly shape, and the shape has a diversion effect. After the air flow enters the fish belly-shaped air inlet channel, through the included angle between the central line of the air inlet valve and the central line of the combustion chamber, the included angle between the throat opening and the curved surface tangential direction of the connected air channel and the shape of the throat opening, the air flow is accelerated at the throat opening, so that high rolling flow can be formed in the combustion chamber, the rolling flow ratio is improved, the central line of the air channel is a curved excessive round sliding line, the middle of the sectional area of the air channel in the shape is large and two ends of the sectional area of the air channel are small, the air flow rapidly enters the combustion chamber, the flow coefficient is ensured, meanwhile, the oil beam avoiding area of the air channel direct injection can be fully arranged, and the interference between the air inlet channel and the oil beam is reduced.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a high tumble ratio PFI engine intake duct structure, includes the inlet port main part, the fixed air flue laryngeal opening of seting up of one end of inlet port main part, the inlet port main part is kept away from the fixed air flue entry that is provided with of one end of air flue laryngeal opening, the inlet port main part is located the fixed valve guide boss that is provided with in top department of air flue laryngeal opening, the fixed sprayer mounting hole that is provided with in middle part of inlet port main part.
Further, an air passage center line is fixedly arranged in the middle of the side wall of the air inlet port main body, and the air passage center line is a bent excessive round slide wire.
Further, a combustion chamber plane is arranged below the air passage throat, and the height L from the center of the air passage inlet to the combustion chamber plane is 53.9CM.
Further, the central line of the valve guide boss is an inlet valve central line, the central line of the combustion chamber plane is a combustion chamber central line, and the included angle between the combustion chamber central line and the inlet valve central line, namely the included angle a between the inlet valve central line and the combustion chamber central line is 17 degrees.
Further, the air passage throat is in a machine-added mode, and the included angle between the air passage throat and the air inlet duct main body, namely the included angle b between the air passage throat and the tangential direction of the curved surface of the connected air passage is 75 degrees.
Further, the oil sprayer mounting hole is the mounted position of the oil sprayer, and the oil sprayer mounting hole adopts air flue injection.
Further, the width of the airway inlet, that is, the length of the airway opening width W is 56CM.
Further, the length of the air passage inlet, namely the length H of the air passage opening is 30CM;
through the technical scheme, under the condition of a certain boundary, the included angle between the central line of the air inlet valve and the central line of the combustion chamber is 17 degrees, the included angle between the central line of the air inlet valve and the tangential direction of the curved surface of the connected air channel is 75 degrees, the cutter of the air channel and the laryngeal opening adopts the R3 and 90-degree scheme, the shape can effectively improve the rolling flow ratio, meanwhile, the inlet of the air inlet channel is rectangular, the length W56 is high H30, the two sides of the air inlet channel are R15 fillets, and the shape and the area of the air inlet can provide sufficient air inflow, so that the flow coefficient is ensured.
The utility model has the following beneficial effects:
1. the utility model provides a high tumble ratio PFI engine air inlet channel structure, wherein the tumble ratio and the flow coefficient of an air inlet channel opening are influenced by a plurality of factors such as the shape of the air inlet channel, the inlet height of the air inlet channel, the sectional area of the air inlet channel, the included angle between the central line of an air inlet valve and the central line of a combustion chamber, the included angle between a throat opening and the curved surface tangential direction of a connected air channel, the shape of the throat opening and the like, and under the condition of a certain boundary, the included angle between the central line of the air inlet valve and the central line of the combustion chamber is 17 degrees, the air channel throat opening is in machine-added mode, the included angle between the central line of the air inlet valve and the curved surface tangential direction of the connected air channel is 75 degrees, and an R3 and 90-degree scheme is adopted for an air channel throat opening cutter, so that the tumble ratio can be effectively improved, but the flow coefficient can be reduced. The inlet of the air inlet is rectangular, the length of the air inlet is W56, the height of the air inlet is H30, the two sides of the air inlet are R15 fillets, and the shape and the area of the air inlet can provide sufficient air inflow, so that the flow coefficient is ensured, and the effects of simultaneously ensuring the high tumble ratio and the high flow coefficient ratio are achieved.
2. The utility model provides an air inlet structure of a high-tumble ratio PFI engine, wherein the lower side of an air inlet is connected with the throat of an air passage in a fish belly shape, and the shape has a diversion effect. After the air flow enters the fish-belly-shaped air inlet channel, the air flow is accelerated at the throat through the optimized included angle between the center line of the air inlet valve and the center line of the combustion chamber, the included angle between the throat and the tangential direction of the curved surface of the connected air channel and the shape of the throat, so that high tumble can be formed in the combustion chamber, and the tumble ratio is improved.
3. According to the high-tumble ratio PFI engine air inlet channel structure, the central line of the air channel is a curved excessive round sliding line, and the middle of the cross section of the air channel in the shape is large and two ends are small, so that air flow rapidly enters a combustion chamber, the flow coefficient is ensured, an oil beam avoiding area of direct injection of the air channel can be fully arranged, and interference between the air inlet channel and the oil beam is reduced.
Drawings
FIG. 1 is a front view of an inlet channel structure of a PFI engine with a high tumble ratio according to the present utility model;
FIG. 2 is a block diagram of an inlet channel structure of a PFI engine with a high tumble ratio according to the present utility model;
fig. 3 is a diagram showing the shape of an intake port structure of a PFI engine with a high tumble ratio according to the present utility model.
Legend description:
1. an intake port body; 2. airway laryngeal opening; 3. an airway inlet; 4. valve guide boss; 5. an intake valve center line; 6. a combustion chamber centerline; 7. an airway centerline; 8. a fuel injector mounting hole; 9. a combustion chamber plane; 10. the included angle a between the central line of the intake valve and the central line of the combustion chamber; 11. an included angle b is formed between the air passage throat and the tangential direction of the curved surface of the connected air passage; 12. the center position of the inlet of the air inlet channel is positioned at the plane height L of the combustion chamber; 13. the air channel opening width W; 14. the port length H.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other examples, which are obtained by persons of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present utility model based on the examples herein, and it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present utility model. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Referring to fig. 1-3, one embodiment provided by the present utility model is: the utility model provides a high tumble ratio PFI engine intake duct structure, includes intake duct mouth main part 1, and the fixed air flue laryngeal opening 2 of having seted up of one end of intake duct mouth main part 1, the fixed air flue entry 3 that is provided with of one end that keeps away from air flue laryngeal opening 2 of intake duct mouth main part 1, the fixed valve guide boss 4 that is provided with in top department that intake duct mouth main part 1 is located air flue laryngeal opening 2, the fixed sprayer mounting hole 8 that is provided with in middle part of intake duct mouth main part 1.
The middle part of the side wall of the air inlet port main body 1 is fixedly provided with an air passage center line 7, the air passage center line 7 is a curved transition circular slide line, the lower part of the air passage throat 2 is a combustion chamber plane 9, the center position of an air inlet passage inlet of the air passage inlet 3 is 53.9CM to the height L12 of the combustion chamber plane, the center line of a valve guide boss 4 is an air inlet valve center line 5, the center line of the combustion chamber plane 9 is a combustion chamber center line 6, the included angle between the combustion chamber center line 6 and the air inlet valve center line 5, namely, the included angle a10 between the air inlet valve center line and the combustion chamber center line is 17 degrees, the air passage throat 2 is a machine-added type, the included angle between the air passage throat 2 and the air inlet port main body 1, namely, the included angle b11 between the air passage throat and the curved surface of a connecting air passage is 75 degrees, the mounting hole 8 of the fuel injector is the mounting position of the fuel injector, the fuel injector is the air passage mounting hole 8 adopts air passage injection, the width of the air passage inlet 3, namely, the length of the air passage opening width W13 is 56CM, and the length of the air passage inlet 3 is 30CM.
Working principle: the included angle between the machine-added type air passage throat and the tangential direction of the curved surface of the connected air passage is 75 degrees, the cutter of the air passage throat adopts the R3 and 90-degree scheme, the shape can effectively improve the rolling flow ratio, but the method can reduce the flow coefficient, so that in order to improve the flow coefficient, the inlet of the air inlet channel is rectangular, the length W56 is high H30, the two sides are R15 round corners, and the shape and the area of the air inlet can provide sufficient air inflow, thereby ensuring the flow coefficient.
Finally, it should be noted that: the foregoing description of the preferred embodiments of the present utility model is not intended to be limiting, but rather, although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (8)
1. The utility model provides a high tumble ratio PFI engine intake duct structure, includes inlet opening main part (1), its characterized in that: the utility model discloses a novel air intake duct, including air intake duct main part (1), air intake duct main part (1) one end fixed set up air flue throat (2), air intake duct main part (1) are kept away from the one end of air flue throat (2) and are fixedly provided with air valve guide boss (4), air intake duct main part (1)'s middle part is fixedly provided with sprayer mounting hole (8).
2. The high tumble ratio PFI engine intake port structure of claim 1, wherein: the air inlet port is characterized in that an air passage center line (7) is fixedly arranged in the middle of the side wall of the air inlet port main body (1), and the air passage center line (7) is a bent excessive round sliding line.
3. The high tumble ratio PFI engine intake port structure of claim 1, wherein: the combustion chamber plane (9) is arranged below the air passage throat (2), and the height L (12) from the center of the air inlet passage of the air passage inlet (3) to the combustion chamber plane is 53.9CM.
4. A high tumble ratio PFI engine inlet structure according to claim 3, wherein: the central line of the valve guide boss (4) is an inlet valve central line (5), the central line of the combustion chamber plane (9) is a combustion chamber central line (6), and the included angle between the combustion chamber central line (6) and the inlet valve central line (5), namely the included angle a (10) between the inlet valve central line and the combustion chamber central line is 17 degrees.
5. The high tumble ratio PFI engine intake port structure of claim 1, wherein: the air passage throat (2) is in a machine-added mode, and the included angle between the air passage throat (2) and the air inlet duct main body (1), namely the included angle b (11) between the air passage throat (2) and the tangential direction of the curved surface of the connected air passage is 75 degrees.
6. The high tumble ratio PFI engine intake port structure of claim 1, wherein: the oil sprayer mounting hole (8) is the mounting position of the oil sprayer, and the oil sprayer mounting hole (8) adopts air flue injection.
7. The high tumble ratio PFI engine intake port structure of claim 1, wherein: the width of the air passage inlet (3), namely the length of the air passage opening width W (13), is 56CM.
8. The high tumble ratio PFI engine intake port structure of claim 1, wherein: the length of the air passage inlet (3), namely the length of the air passage opening H (14), is 30CM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320663358.7U CN219672752U (en) | 2023-03-30 | 2023-03-30 | High tumble ratio PFI engine air inlet structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320663358.7U CN219672752U (en) | 2023-03-30 | 2023-03-30 | High tumble ratio PFI engine air inlet structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219672752U true CN219672752U (en) | 2023-09-12 |
Family
ID=87896382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320663358.7U Active CN219672752U (en) | 2023-03-30 | 2023-03-30 | High tumble ratio PFI engine air inlet structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219672752U (en) |
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2023
- 2023-03-30 CN CN202320663358.7U patent/CN219672752U/en active Active
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