CN210509419U - Diesel engine air inlet structure, engine and automobile - Google Patents
Diesel engine air inlet structure, engine and automobile Download PDFInfo
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- CN210509419U CN210509419U CN201921578549.3U CN201921578549U CN210509419U CN 210509419 U CN210509419 U CN 210509419U CN 201921578549 U CN201921578549 U CN 201921578549U CN 210509419 U CN210509419 U CN 210509419U
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- valve seat
- seat ring
- contour line
- diesel engine
- air inlet
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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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Abstract
The utility model provides a diesel engine air intake structure belongs to vehicle equipment technical field, including cylinder cap, helical air inlet and tangential intake duct. The cylinder cover is provided with a first valve seat ring and a second valve seat ring, the upper part of the first valve seat ring is connected with a first valve guide pipe, and the upper part of the second valve seat ring is connected with a second valve guide pipe; the spiral air inlet passage is communicated with the cylinder cover through a first valve seat ring; the tangential air inlet channel is communicated with the cylinder cover through the second valve seat ring, the tangential air inlet channel is far away from the second valve seat ring and is close to the direction of the second valve seat ring, and the cross section of the inner contour is gradually decreased. The utility model discloses still including the car that uses above-mentioned diesel engine inlet structure. The utility model provides a pair of diesel engine inlet structure under the prerequisite that does not adopt the two-stage pressure boost, can satisfy low-speed moment of torsion and high-speed power's requirement, need not to increase spare part, has reduced manufacturing cost, has satisfied the light-weighted requirement of vehicle.
Description
Technical Field
The utility model belongs to the technical field of vehicle equipment, more specifically say, relate to a diesel engine air intake structure, use this diesel engine air intake structure's engine and use the car of this engine.
Background
The diesel engine is an engine which burns diesel to obtain energy release, and as the diesel engine has high compression ratio and low price and the advantages of the diesel engine in the aspects of energy saving and carbon dioxide emission, all the heat engines including the gasoline engine cannot replace the diesel engine, and the diesel engine can further increase the occupied proportion of passenger cars along with the enhancement of the environmental protection consciousness of the people in China.
However, the passenger vehicle and the commercial vehicle have different use conditions, have high requirements on low-speed responsiveness, and have higher requirements on high-speed power in order to ensure the highest vehicle speed. Therefore, higher requirements are provided for the selection of the supercharger of the diesel engine, if the performance of a low-speed section and a high-speed section of the diesel engine is required to be met at the same time, a two-stage supercharged engine is generally selected, and the air inflow of the low-speed section of the engine, namely low-speed torque, is ensured by using a one-stage supercharger of a small-diameter turbine; the two-stage supercharger of the large-diameter turbine is used for ensuring the air input, namely high-speed power, of the high-speed section of the engine. By adopting the two-stage supercharging mode, although the requirements of low-speed torque and high-speed power of the diesel engine can be met, the parts of an air inlet system of the diesel engine are increased, the manufacturing cost is increased, the weight of the whole vehicle is increased, and the development concept of light weight of the vehicle is not met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a diesel engine inlet structure, when aiming at solving diesel engine and adopting the two-stage pressure boost to satisfy the requirement of low-speed moment of torsion and high-speed power, lead to diesel engine air intake system spare part to increase, make manufacturing cost's rising, still can improve whole car weight, unsatisfied vehicle lightweight's the problem of development theory.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a diesel engine intake structure including:
the cylinder cover is provided with a first valve seat ring and a second valve seat ring, the upper part of the first valve seat ring is connected with a first valve guide pipe, and the upper part of the second valve seat ring is connected with a second valve guide pipe;
the spiral air inlet channel is communicated with the cylinder cover through the first valve seat ring;
the tangential air inlet passage is communicated with the cylinder cover through the second valve seat ring, and the tangential air inlet passage is away from the second valve seat ring and gradually decreases towards the direction close to the second valve seat ring.
As another embodiment of this application, the profile longitudinal section forms contour line and last contour line down in the tangential intake duct, go up the contour line by second valve pipe separates into the upper contour line of air flue and is close to the profile line on the laryngeal opening of second valve seat circle one side, the last contour line of air flue in the contained angle of second valve pipe axis with the deviation of contour line on the laryngeal opening with the contained angle of second valve pipe axis is within 5.
As another embodiment of the application, the included angle between the upper airway contour line and the axis of the second valve guide pipe is the same as the included angle between the upper laryngeal opening contour line and the axis of the second valve guide pipe.
As another embodiment of the application, the included angle between the upper air flue contour line and the axis of the second valve guide pipe is 45-65 degrees.
As another embodiment of the present application, the lower end point of the lower contour line is located on the second valve seat ring upper end surface.
As another embodiment of the present application, a difference between an angle between the lower contour line and an axis of the second valve guide and an angle between the upper contour line of the air passage and an axis of the second valve guide is 5 ° to 25 °.
As another embodiment of this application, the last contour line of tangential intake duct is being close to one side of cylinder cap has the downward straightway of slope, the straightway by the partial contour line of contour line on the air flue with at least partially contour line constitutes on the laryngeal opening.
As another embodiment of the present application, the first valve seat ring and the second valve seat ring are each interference fit with the cylinder head.
The utility model provides a pair of diesel engine air inlet structure's beneficial effect lies in: compared with the prior art, the utility model discloses a diesel engine air inlet structure, the cross section of tangential intake duct inner profile is from keeping away from second valve seat circle to being close to second valve seat circle and progressively decreases, forms the convergent structure, can increase the admission speed that gets into the cylinder cap, produces the vortex, satisfies the requirement of low-speed moment of torsion; meanwhile, the air inflow of the air entering the cylinder cover is promoted by matching with the spiral air inlet channel, the requirement of high-speed power is met, the requirements of low-speed torque and high-speed power can be met on the premise of not adopting two-stage pressurization, no part needs to be added, the manufacturing cost is reduced, and the requirement of light weight of the vehicle is met.
The utility model also provides an engine, include a diesel engine air inlet structure.
The utility model provides a pair of engine's beneficial effect lies in: compared with the prior art, the utility model discloses an engine, owing to used above-mentioned diesel engine air inlet structure, the cross section of tangential intake duct inner profile is from keeping away from second valve seat circle to being close to second valve seat circle and is progressively reduced, forms the convergent structure, can increase the admission speed that gets into the cylinder cap, produces the vortex, satisfies the requirement of low-speed moment of torsion; meanwhile, the air inflow of the air entering the cylinder cover is promoted by matching with the spiral air inlet channel, the requirement of high-speed power is met, the requirements of low-speed torque and high-speed power can be met on the premise of not adopting two-stage pressurization, no part needs to be added, the manufacturing cost is reduced, and the requirement of light weight of the vehicle is met.
The utility model also provides an automobile, including the engine.
The utility model provides a pair of beneficial effect of car lies in: compared with the prior art, the utility model discloses an automobile, owing to used above-mentioned engine, the cross section of tangential intake duct inner profile is from keeping away from second valve seat circle to being close to second valve seat circle and is progressively decreased, forms the convergent structure, can increase the admission speed that gets into the cylinder cap, produces the vortex, satisfies the requirement of low-speed moment of torsion; meanwhile, the air inflow of the air entering the cylinder cover is promoted by matching with the spiral air inlet channel, the requirement of high-speed power is met, the requirements of low-speed torque and high-speed power can be met on the premise of not adopting two-stage pressurization, no part needs to be added, the manufacturing cost is reduced, and the requirement of light weight of the vehicle is met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a top view of an air intake structure of a diesel engine according to an embodiment of the present invention;
fig. 2 is a front view of an air inlet structure of a diesel engine according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of fig. 2.
In the figure: 1. a cylinder cover; 2. a first valve seat ring; 3. a second valve seat ring; 4. a first valve conduit; 5. a second valve guide; 6. a helical air intake; 7. a tangential air inlet channel; 71. an upper airway contour line; 72. a contour line on the laryngeal opening; 73. and (4) a lower contour line.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 3, an intake structure of a diesel engine according to the present invention will now be described. The utility model provides a diesel engine air intake structure, includes cylinder cap 1, first valve seat circle 2, second valve seat circle 3, first valve pipe 4, second valve pipe 5, helical intake duct 6 and tangential intake duct 7.
The cylinder cover 1 is provided with a first valve seat ring 2 and a second valve seat ring 3, the upper part of the first valve seat ring 2 is connected with a first valve guide pipe 4, and the upper part of the second valve seat ring 3 is connected with a second valve guide pipe 5; the spiral air inlet channel 6 is communicated with the cylinder cover 1 through the first valve seat ring 2; the tangential air inlet channel 7 is communicated with the cylinder cover 1 through the second valve seat ring 3, the tangential air inlet channel 7 is far away from the second valve seat ring 3 to the direction close to the second valve seat ring 3, and the cross section of the inner contour is gradually decreased.
Two air inlets and two exhaust holes are opened to the upper end of cylinder cap 1, and first valve seat circle 2 and second valve seat circle 3 are installed respectively in two air inlets.
Compared with the prior art, the cross section of the inner contour of the tangential air inlet channel 7 gradually decreases from the position far away from the second valve seat ring 3 to the position near the second valve seat ring 3 to form a gradually-reducing structure, so that the air inlet speed entering the cylinder cover 1 can be increased, a vortex is generated, and the requirement of low-speed torque is met; meanwhile, the air inflow entering the cylinder cover 1 is improved by matching with the spiral air inlet duct 6, the requirement of high-speed power is met, the requirements of low-speed torque and high-speed power can be met on the premise of not adopting two-stage supercharging, no part needs to be added, the manufacturing cost is reduced, and the requirement of light weight of a vehicle is met.
As a specific implementation manner of the diesel engine air intake structure provided by the utility model, please refer to fig. 3, the profile longitudinal section forms lower contour line 73 and last contour line in the tangential intake duct 7, goes up contour line and is separated into contour line 71 on the air flue and is close to contour line 72 on the laryngeal of second valve seat circle 3 one side by second valve pipe 5, and contour line 71 is the same on the air flue in the contained angle of second valve pipe 5 axis and the contained angle of contour line 72 and second valve pipe 5 axis on the laryngeal. In this embodiment, the tangential inlet 7 is divided into a cross-sectional structure along the central axis thereof, one side of the cross-sectional structure close to the cylinder head 1 is an upper contour line, one side of the cross-sectional structure far away from the cylinder head 1 is a lower contour line 73, one side of the upper contour line close to the second valve retainer 3 is a throat upper contour line 72, one side of the upper contour line far away from the second valve retainer 3 is an upper air passage contour line 71, the upper contour line of the tangential inlet 7 has a downward inclined straight line segment on one side close to the cylinder head 1, the straight line segment is composed of a partial contour line of the upper air passage contour line 71 and at least a partial throat upper contour line 72, and the straight line segment can ensure the smooth degree of circulation of fresh air entering the cylinder head 1.
As a specific embodiment of the air intake structure of the diesel engine provided in the present invention, please refer to fig. 3, an included angle between the upper air passage contour line 71 and the axis of the second valve guide 5 is 45 ° to 65 °. In this embodiment, when the included angle between the upper air passage contour line 71 and the axis of the second valve guide pipe 5 is 55 °, the air in the tangential air inlet channel 7 can smoothly enter the cylinder, so that the air flow is ensured, the vortex is not generated, and the low-speed torque or high-speed power index of the engine can be ensured. If the included angle between the upper air passage contour line 71 and the axis of the second valve guide pipe 5 is more than 65 degrees, the tangential air inlet channel 7 is not favorable for generating in-cylinder vortex, the oil-gas mixing is not favorable, and the emission of particles is easy to exceed the standard; if the included angle between the air passage upper contour line 71 and the axis of the second valve guide pipe 5 is less than 45 degrees, the air circulation capacity of the tangential air inlet channel 7 is affected, so that the amount of fresh air entering the cylinder cover 1 through the tangential air inlet channel 7 is reduced, and the low-speed torque or high-speed power index of the engine is difficult to achieve.
As a specific embodiment of the intake structure of the diesel engine provided in the present invention, please refer to fig. 3, the lower side end point of the lower contour line 73 is located on the upper end surface of the second valve seat ring 3. In this embodiment, the lower end point of the lower contour line 73 is generally located as low as possible, i.e., as close to the cylinder head 1 as possible, and the optimal position is such that the lower contour line 73 extends to the upper end surface of the second valve seat ring 3, so that gas can be prevented from entering the cylinder head 1 from the position near the lower contour line 73.
As a specific embodiment of the air intake structure of the diesel engine provided in the present invention, please refer to fig. 3, the difference between the angle between the lower contour line 73 and the axis line angle of the second valve guide 5 and the angle between the upper contour line 71 and the axis line angle of the second valve guide 5 is 5 ° to 25 °. In this embodiment, when the difference between the angle between the lower contour line 73 and the axis line of the second valve guide pipe 5 and the angle between the upper contour line 71 and the axis line of the second valve guide pipe 5 is 15 °, the structural strength of the valve seat can be ensured, and the gas flow rate at the second valve seat ring 3 can be increased, which is favorable for increasing the gas flow rate of the tangential gas inlet channel 7. If the included angle between the lower contour line 73 and the axis of the second valve guide pipe 5 is larger than the included angle between the upper contour line 71 of the air passage and the axis of the second valve guide pipe 5 by 25 degrees, the wall thickness between the lower contour line 73 of the air passage and the second valve seat ring 3 is too thin, so that the structural strength is too low, and the hidden danger of cracking exists; if the included angle between the lower contour line 73 of the air passage and the axis of the second valve guide pipe 5 is smaller than the included angle between the upper contour line 71 of the air passage and the axis of the second valve guide pipe 5 by 5 degrees, an optimal tapered structure cannot be formed between the lower contour line 73 and the upper contour line 71 of the air passage, the gas flow speed at the position of the second valve seat ring 3 cannot be promoted, and the gas flow of the tangential air inlet channel 7 cannot be promoted.
As a specific embodiment of the intake structure of the diesel engine provided in the present invention, please refer to fig. 1 to 3, the first valve seat ring 2 and the second valve seat ring 3 are respectively in interference fit with the cylinder cover 1. In this embodiment, when the first valve seat ring 2 and the second valve seat ring 3 are installed, the first valve seat ring 2 or the second valve seat ring 3 is firstly placed in dry ice or liquid nitrogen for not less than 10min, meanwhile, the corresponding air inlet hole is heated 373K-423K by using a blowtorch, then sealant is coated on the first valve seat ring 2 or the second valve seat ring 3 and is pressed into the corresponding air inlet hole, and when the first valve seat ring 2 or the second valve seat ring 3 and the air inlet hole reach normal temperature, the installation is in interference fit.
The utility model discloses an optimize the shape of profile and lower profile on the tangential air flue and arrange the angle, can realize that the direction of admitting air all by nearly tangential air flue on the profile department get into the jar in, provide necessary condition for forming reasonable flow in the jar.
The novel engine that still provides of this use, including foretell diesel engine air intake structure.
The utility model provides a pair of engine's beneficial effect lies in: compared with the prior art, the utility model discloses an engine, owing to used above-mentioned diesel engine air inlet structure, the cross section of tangential intake duct 7 inner profile from keeping away from second valve seat circle 3 to being close to second valve seat circle 3 and progressively declining, form the convergent structure, can increase the admission speed that gets into cylinder cap 1, produce the vortex, satisfy the requirement of low-speed moment of torsion; meanwhile, the air inflow entering the cylinder cover 1 is improved by matching with the spiral air inlet duct 6, the requirement of high-speed power is met, the requirements of low-speed torque and high-speed power can be met on the premise of not adopting two-stage supercharging, no part needs to be added, the manufacturing cost is reduced, and the requirement of light weight of a vehicle is met.
The novel car that still provides of this use, including foretell engine.
The utility model provides a pair of beneficial effect of car lies in: compared with the prior art, the utility model discloses an automobile, owing to used above-mentioned engine, the cross section of tangential intake duct 7 inner profile from keeping away from second valve seat circle 3 to being close to second valve seat circle 3 and progressively diminishing, forms convergent structure, can increase the admission speed that gets into cylinder cap 1, produces the vortex, satisfies the requirement of low-speed moment of torsion; meanwhile, the air inflow entering the cylinder cover 1 is improved by matching with the spiral air inlet duct 6, the requirement of high-speed power is met, the requirements of low-speed torque and high-speed power can be met on the premise of not adopting two-stage supercharging, no part needs to be added, the manufacturing cost is reduced, and the requirement of light weight of a vehicle is met.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An intake structure of a diesel engine, characterized by comprising:
the cylinder cover is provided with a first valve seat ring and a second valve seat ring, the upper part of the first valve seat ring is connected with a first valve guide pipe, and the upper part of the second valve seat ring is connected with a second valve guide pipe;
the spiral air inlet channel is communicated with the cylinder cover through the first valve seat ring;
the tangential air inlet passage is communicated with the cylinder cover through the second valve seat ring, and the tangential air inlet passage is away from the second valve seat ring and gradually decreases towards the direction close to the second valve seat ring.
2. The intake structure of a diesel engine as set forth in claim 1, wherein the tangential intake duct inner contour longitudinal section forms a lower contour line and an upper contour line, the upper contour line is divided into an intake duct upper contour line and a throat upper contour line near the second valve seat ring side by the second valve guide, and the deviation of the angle of the intake duct upper contour line with respect to the axis of the second valve guide from the angle of the throat upper contour line with respect to the axis of the second valve guide is within 5 °.
3. The intake structure of a diesel engine as set forth in claim 2, wherein the angle between the upper contour of the air passage and the axis of the second valve guide is the same as the angle between the upper contour of the throat and the axis of the second valve guide.
4. The diesel engine intake structure of claim 2, wherein the angle between the upper air passage profile line and the axis of the second valve guide is 45 ° to 65 °.
5. The intake structure of a diesel engine as set forth in claim 2, wherein the lower end point of the lower contour line is located on the upper end surface of the second valve seat ring.
6. The diesel engine intake structure of claim 2, wherein the difference between the angle between the lower contour line and the axis of the second valve guide and the angle between the upper contour line of the air passage and the axis of the second valve guide is 5 ° to 25 °.
7. The intake structure of a diesel engine as set forth in any one of claims 2 to 6, wherein the upper contour line of the tangential intake port has a straight line segment inclined downward on a side close to the cylinder head, the straight line segment being composed of a partial contour line of the upper contour line of the intake passage and at least a part of the upper contour line of the throat.
8. The intake structure of a diesel engine as set forth in claim 1, wherein the first valve seat ring and the second valve seat ring are respectively interference-fitted to the cylinder head.
9. An engine characterized by comprising a diesel engine intake structure as claimed in any one of claims 1 to 8.
10. A vehicle comprising the engine of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921578549.3U CN210509419U (en) | 2019-09-23 | 2019-09-23 | Diesel engine air inlet structure, engine and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921578549.3U CN210509419U (en) | 2019-09-23 | 2019-09-23 | Diesel engine air inlet structure, engine and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210509419U true CN210509419U (en) | 2020-05-12 |
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ID=70571069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921578549.3U Active CN210509419U (en) | 2019-09-23 | 2019-09-23 | Diesel engine air inlet structure, engine and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210509419U (en) |
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2019
- 2019-09-23 CN CN201921578549.3U patent/CN210509419U/en active Active
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