CN211598847U - Engine air inlet structure, diesel engine cylinder cover, diesel engine and vehicle - Google Patents
Engine air inlet structure, diesel engine cylinder cover, diesel engine and vehicle Download PDFInfo
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- CN211598847U CN211598847U CN202020288546.2U CN202020288546U CN211598847U CN 211598847 U CN211598847 U CN 211598847U CN 202020288546 U CN202020288546 U CN 202020288546U CN 211598847 U CN211598847 U CN 211598847U
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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 an engine air inlet structure, which comprises a cylinder cover, wherein the cylinder cover is provided with a first air inlet, a second air inlet, a first exhaust port and a second exhaust port, the first air inlet is connected with a tangential air passage, and the second air inlet is connected with a spiral air passage; a first eccentric guide groove is formed in the outer edge of the first air inlet on the cylinder cover, and a second eccentric guide groove is formed in the outer edge of the second air inlet; the utility model also provides a diesel engine cylinder lid, diesel engine and vehicle that have above-mentioned engine air inlet structure. The utility model discloses abandoned the method that promotes the vortex ratio of admitting air through the structure of modifying the air flue among the prior art, utilized first eccentric guide way and the eccentric guide way of second to guide respectively gaseous to cylinder cap exhaust side and guide gaseous to the cylinder cap side of admitting air and flow, can make and get into the gaseous end to end of gaseous in the jar and getting into the jar from the second air inlet from first air inlet, formed vortex motion, reached the effect that promotes the vortex ratio of admitting air.
Description
Technical Field
The utility model belongs to the technical field of the engine, more specifically say, relate to an engine air inlet structure, diesel engine cylinder cap, diesel engine and vehicle.
Background
The original emission of the engine is one of important contents of the emission control of the engine, and many influencing factors, such as the swirl ratio of the air inlet of the engine, the injector characteristic of the engine, the structural shape of the piston of the engine, the gasket of the injector and the gasket of the piston, and the like, have very important influence on the original emission of the engine (including the emission of nitrogen oxides).
In the prior art, the method for improving the air inlet swirl ratio of the diesel engine has the structure of an air passage, but the structure of the air passage of the diesel engine, particularly a spiral air passage, is complex, the modification difficulty is high, the modification result is not easy to control, and the modification mode can not be standardized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an engine air intake structure aims at utilizing among the solution prior art to modify air flue structural approach and promotes the technical problem that the vortex ratio of admitting air is big than the realization degree of difficulty.
In order to achieve the above object, the utility model adopts the following technical scheme: the engine air inlet structure comprises a cylinder cover, wherein a first air inlet, a second air inlet, a first exhaust port, a second exhaust port and an injector mounting hole are formed in the cylinder cover;
the first eccentric guide groove is suitable for guiding the gas flowing in through the first gas inlet to flow to the exhaust side of the cylinder cover, and the second eccentric guide groove is suitable for guiding the gas flowing in through the second gas inlet to flow to the intake side of the cylinder cover.
As another embodiment of the present invention, the connection line of the first air inlet center point to the first exhaust port center point is a first reference line, the eccentric point of the first eccentric guide groove is located the first reference line is kept away from one side of the injector mounting hole, and the eccentric point of the first eccentric guide groove is close to the first exhaust port relative to the center point of the first air inlet, the perpendicular bisector of the first eccentric guide groove and the included angle of the first reference line are 25-40 °, and the circumferential wrap angle of the first eccentric guide groove is 190 ° with 150-.
As another embodiment of the present invention, the connection line of the second air inlet center point to the second air outlet center point is a second reference line, the eccentric point of the second eccentric guide groove is located the second reference line is close to one side of the injector mounting hole, and the eccentric point of the second eccentric guide groove is opposite to the center point of the second air inlet and is far away from the second air outlet, the perpendicular bisector of the second eccentric guide groove and the included angle of the second reference line are 35-55 °, and the circumferential wrap angle of the second eccentric guide groove is 190 ° with 150-.
As another embodiment of the present invention, the guide wall surface of the first eccentric guide groove is inclined from top to bottom toward the periphery of the first air inlet; and the guide wall surface of the second eccentric guide groove is obliquely arranged from top to bottom towards the periphery of the second air inlet.
As another embodiment of the present invention, the inclination angle of the guide wall surface of the first eccentric guide groove is 15 to 45 °, and the inclination angle of the guide wall surface of the second eccentric guide groove is 15 to 45 °.
As another embodiment of the present invention, the distance from the eccentric point of the first eccentric guide groove to the central point of the first air inlet is 1-5mm, and the radius of the first eccentric guide groove is 10-30 mm; the distance from the eccentric point of the second eccentric guide groove to the central point of the second air inlet is 1-5mm, and the radius of the second eccentric guide groove is 10-30 mm.
As another embodiment of the present invention, the first air inlet is connected to the tangential air passage, and the second air inlet is connected to the spiral air passage.
The utility model provides an engine air intake structure's beneficial effect lies in: compared with the prior art, the utility model discloses engine inlet structure, the method that promotes the vortex ratio of admitting air through the structure of modifying the air flue among the prior art has been abandoned, set up first eccentric guide way in the outer fringe department of first air inlet on the cylinder cap, set up the eccentric guide way of second in the outer fringe department of second air inlet, utilize the guide of first eccentric guide way to flow to the cylinder cap exhaust side via the gas that first air inlet flowed in, utilize the guide of the eccentric guide way of second to flow to the cylinder cap inlet side via the gas that the second air inlet flowed in, can make the gas that gets into in the jar from first air inlet and the gas that gets into in the jar from the second air inlet realize end to end, thereby gaseous form round the central line of cylinder body and along the rotatory rotary motion of cylinder wall, also be the vortex motion in the jar, reach the effect that promotes the vortex ratio of admitting air.
The utility model also provides a diesel engine cylinder lid, including foretell engine air inlet structure.
The utility model also provides a diesel engine, including foretell diesel engine cylinder cap.
The utility model also provides a vehicle, including foretell diesel engine.
The utility model provides a beneficial effect of diesel engine cylinder cap, diesel engine and vehicle is the same with the beneficial effect of foretell engine air inlet structure, no longer gives unnecessary details here.
Drawings
Fig. 1 is a schematic structural diagram of an engine intake structure provided in an embodiment of the present invention;
fig. 2 and fig. 3 are schematic bottom view structures of an air intake structure of an engine according to an embodiment of the present invention.
In the figure: 1. a cylinder cover; 2. a tangential airway; 3. a helical air passage; 4. a first air inlet, 5, a second air inlet; 6. a first exhaust port; 7. a second exhaust port; 8. a first eccentric guide groove; 9. a second eccentric guide groove; 10. a valve seat ring; 11. an injector mounting hole; A. a first reference line; B. a perpendicular bisector of the first eccentric guide groove; C. a second reference line; D. a perpendicular bisector of the second eccentric guide groove; alpha, the included angle between the perpendicular bisector of the first eccentric guide groove and the first datum line; beta, the circumferential wrap angle of the first eccentric guide groove; gamma, the included angle between the perpendicular bisector of the second eccentric guide groove and the second datum line; and the circumferential wrap angle of the second eccentric guide groove.
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 to 3 together, an intake structure of an engine according to the present invention will now be described. The engine air inlet structure comprises a cylinder cover 1, wherein a first air inlet 4, a second air inlet 5, a first exhaust port 6, a second exhaust port 7 and an injector mounting hole 11 are arranged on the cylinder cover 1, and the first air inlet 4, the second air inlet 5, the second exhaust port 7 and the first exhaust port 6 are sequentially arranged in an annular mode. The injector mounting hole 11 is located in an annular portion surrounded by the first intake port 4, the second intake port 5, the second exhaust port 7, and the first exhaust port 6.
A first eccentric guide groove 8 is formed in the outer edge of the first air inlet 4 and a second eccentric guide groove 9 is formed in the outer edge of the second air inlet 5 in the cylinder cover 1. The first eccentric guide groove 8 guides the gas flowing in through the first gas inlet 4 to the exhaust side of the cylinder head 1, and the second eccentric guide groove 9 guides the gas flowing in through the second gas inlet 5 to the intake side of the cylinder head 1.
In-cylinder combustion of diesel engines is dominated by diffusion combustion mode, combustion being carried out while injecting fuel and mixing with air, so that if relatively uniform combustion is desired in the cylinder, it is desirable that the injection be symmetrical along the cylinder center and that the air flow in the cylinder be symmetrically distributed along the cylinder center, which is advantageous for mixing air with fuel. The combustion system of a diesel engine is charged with a swirling motion that is desirable for in-cylinder airflow motion to be a rotational motion about the cylinder bore centerline. Based on the gas flow design idea, the diesel engine is generally designed with a tangential gas passage and a spiral gas passage to organize the gas flow to form a vortex motion, wherein the structure of the spiral gas passage is complex, and the gas passing through the spiral gas passage is rotated by a spiral chamber structure so as to achieve the effect that the gas flow in the cylinder is a vortex flow mode around the center line of the cylinder hole.
In the prior art, the strength of the vortex motion is improved by usually modifying the structures of the tangential air passage 2 and the spiral air passage 3 of the diesel engine, but the spiral chamber structure of the spiral air passage 3 is complex, the design difficulty is high, and the design intention can be achieved after modification with great uncertainty, so that modification of the air passage needs to be tried continuously, the effect is verified continuously, and various problems such as long modification period time, poor verification of the modification effect and the like are caused. The tangential air passage and the spiral air passage are required to be matched to organize flow, and the two air passages are required to be coupled together for adjustment, so that the difficulty in system modification is increased.
The utility model discloses engine air inlet structure, abandoned the method that improves the vortex ratio of admitting air through modifying the structure of air flue among the prior art, through set up first eccentric guide way 8 in the outer fringe department of first air inlet 4 on cylinder cap 1, set up second eccentric guide way 9 in the outer fringe department of second air inlet 5, utilize first eccentric guide way 8 and second eccentric guide way 9 to change the flow state of gaseous in the air intake process, first eccentric guide way 8 guides the gaseous flow that flows in via first air inlet 4 to the exhaust side of cylinder cap 1, second eccentric guide way 9 guides the gaseous flow that flows in via second air inlet 5 to the air intake side of cylinder cap 1, can make the gaseous and the gaseous end-to-end that get into the jar from first air inlet 4 and get into the gaseous realization of jar from second air inlet 5, as shown by the arrow in figure 1, thereby gaseous form round the central line of cylinder body and along the rotatory rotary motion of cylinder wall, namely the vortex motion in the cylinder, so as to achieve the effect of improving the intake vortex ratio.
Referring to fig. 2 and 3, as a specific embodiment of the air intake structure of the engine of the present invention, the first air inlet 4 is connected to the tangential air passage 2, and the second air inlet 5 is connected to the spiral air passage 3. The airflow passing through the tangential air passage 2 enters the cylinder body in the tangential direction of the cylinder body, and can naturally form vortex; the gas passing through the spiral duct 3 spontaneously generates a vortex flow to flow into the cylinder in a vortex state. The spiral air passage 3 and the tangential air passage 2 are combined for use, which is beneficial to obtaining more proper vortex ratio, thereby further promoting the oil-gas mixing process and the combustion process.
Please refer to fig. 2 and fig. 3, as a specific embodiment of the air intake structure of the engine provided by the present invention, a connection line from a central point of the first air inlet 4 to a central point of the first exhaust port 6 is used as a first reference line a, an eccentric point of the first eccentric guide groove 8 is located on one side of the first reference line a away from the injector mounting hole 11, the eccentric point of the first eccentric guide groove 8 is close to the first exhaust port 6 relative to the central point of the first air inlet 4, an included angle between a perpendicular bisector B of the first eccentric guide groove and the first reference line a is α, α satisfies 25 ≤ α ≤ 40 °, a circumferential wrap angle of the first eccentric guide groove is β, β satisfies 150 ≤ β ≤ 190 °.
A connecting line from the center point of the second air inlet 5 to the center point of the second air outlet 7 is taken as a second reference line C, the eccentric point of the second eccentric guide groove 9 is positioned on one side, close to the injector mounting hole 11, of the second reference line C, the eccentric point of the second eccentric guide groove 9 is far away from the second air outlet 7 relative to the center point of the second air inlet 5, the included angle between the perpendicular bisector D of the second eccentric guide groove and the second reference line C is gamma, gamma is not less than 35 and not more than 55 degrees, and the circumferential wrap angle of the second eccentric guide groove is not less than 150 and not more than 190 degrees.
Through the parameter design, the gas flowing through the first gas inlet 4 can be ensured to smoothly flow to the exhaust side of the cylinder cover 1, and the gas flowing through the second gas inlet 5 can smoothly flow to the gas inlet side of the cylinder cover 1, so that the two groups of gas are connected end to end.
Specifically, the guide wall surface of the first eccentric guide groove 8 is inclined from top to bottom toward the periphery of the first air inlet 4, the inclination angle of the guide wall surface of the first eccentric guide groove 8 is 15 to 45 °, the guide wall surface of the second eccentric guide groove 9 is inclined from top to bottom toward the periphery of the second air inlet 5, and the inclination angle of the guide wall surface of the second eccentric guide groove 9 is 15 to 45 °.
Because the guide wall surfaces of the first eccentric guide groove 8 and the second eccentric guide groove 9 are inclined surfaces, the guide wall surface of the first eccentric guide groove 8 guides the airflow to obliquely face the inner wall of the cylinder body, the guide wall surface of the second eccentric guide groove 9 guides the airflow to obliquely face the inner wall of the cylinder body, and the airflow rotates along the inner wall of the cylinder body, so that the air and the fuel can be more fully mixed.
Specifically, the distance from the eccentric point of the first eccentric guide groove 8 to the center point of the first air inlet 4 is 1-5mm, and the radius of the first eccentric guide groove 8 is 10-30 mm. The distance from the eccentric point of the second eccentric guide groove 9 to the central point of the second air inlet 5 is 1-5mm, and the radius of the second eccentric guide groove 9 is 10-30 mm.
The radius of the first eccentric guide groove 8 herein means a distance from the guide wall surface of the first eccentric guide groove 8 to the eccentric point of the first eccentric guide groove 8.
Referring to fig. 1, as a specific embodiment of the air intake structure of the engine provided by the present invention, the cylinder head 1 is fixedly connected with valve seat rings 10 in the first air inlet 4 and the second air inlet 5, respectively, and the valve seat rings 10 are located above the first eccentric guide groove 8 and the second eccentric guide groove 9.
Because the first eccentric guide groove 8 is positioned at the outer edge of the first air inlet 4, and the second eccentric guide groove 9 is positioned at the outer edge of the second air inlet 5, when the tangential air passage 2 and the spiral air passage 3 are closed by the air inlet valve, in order to avoid air leakage from the first eccentric guide groove 8 and the second eccentric guide groove 9, valve seat rings 10 are respectively and fixedly connected in the first air inlet 4 and the second air inlet 5, and the valve seat rings 10 are used for being tightly attached to the air inlet valve, so that the air tightness of the air passages is ensured.
The utility model also provides a diesel engine cylinder lid, including foretell engine air inlet structure.
The utility model also provides a diesel engine, including foretell diesel engine cylinder cap.
The utility model also provides a vehicle, including foretell diesel engine.
The utility model provides a beneficial effect of diesel engine cylinder cap, diesel engine and vehicle is the same with the beneficial effect of foretell engine air inlet structure, no longer gives unnecessary details here.
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. The engine air inlet structure comprises a cylinder cover, wherein a first air inlet, a second air inlet, a first exhaust port, a second exhaust port and an injector mounting hole are formed in the cylinder cover;
the first eccentric guide groove is used for guiding the gas flowing in through the first gas inlet to flow to the exhaust side of the cylinder cover, and the second eccentric guide groove is used for guiding the gas flowing in through the second gas inlet to flow to the intake side of the cylinder cover.
2. The engine intake structure according to claim 1, wherein a line connecting the center point of the first intake port to the center point of the first exhaust port is a first reference line, the eccentric point of the first eccentric guide groove is located on a side of the first reference line away from the injector mounting hole, the eccentric point of the first eccentric guide groove is located close to the first exhaust port with respect to the center point of the first intake port, an angle between a perpendicular bisector of the first eccentric guide groove and the first reference line is 25 to 40 °, and a circumferential wrap angle of the first eccentric guide groove is 150-190 °.
3. The engine intake structure according to claim 2, wherein a line connecting the center point of the second intake port to the center point of the second exhaust port is a second reference line, the eccentric point of the second eccentric guide groove is located on a side of the second reference line close to the injector mounting hole, and the eccentric point of the second eccentric guide groove is located away from the second exhaust port with respect to the center point of the second intake port, an angle between a perpendicular bisector of the second eccentric guide groove and the second reference line is 35 to 55 °, and a circumferential wrap angle of the second eccentric guide groove is 150-190 °.
4. The engine intake structure according to claim 1, wherein the guide wall surface of the first eccentric guide groove is disposed obliquely from top to bottom toward the periphery of the first intake port; and the guide wall surface of the second eccentric guide groove is obliquely arranged from top to bottom towards the periphery of the second air inlet.
5. The engine intake structure according to claim 4, wherein the guide wall surface of the first eccentric guide groove is inclined at an angle of 15 to 45 °, and the guide wall surface of the second eccentric guide groove is inclined at an angle of 15 to 45 °.
6. The engine intake structure according to claim 1, wherein the distance from the eccentric point of the first eccentric guide groove to the center point of the first intake port is 1 to 5mm, and the radius of the first eccentric guide groove is 10 to 30 mm; the distance from the eccentric point of the second eccentric guide groove to the central point of the second air inlet is 1-5mm, and the radius of the second eccentric guide groove is 10-30 mm.
7. The engine intake structure according to any one of claims 1 to 6, wherein the first intake port is connected to a tangential air passage, and the second intake port is connected to a spiral air passage.
8. A diesel engine cylinder head characterized by comprising the engine intake structure of any one of claims 1 to 7.
9. A diesel engine comprising the diesel engine cylinder head of claim 8.
10. A vehicle characterized by comprising the diesel engine of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020288546.2U CN211598847U (en) | 2020-03-10 | 2020-03-10 | Engine air inlet structure, diesel engine cylinder cover, diesel engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020288546.2U CN211598847U (en) | 2020-03-10 | 2020-03-10 | Engine air inlet structure, diesel engine cylinder cover, diesel engine and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211598847U true CN211598847U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020288546.2U Active CN211598847U (en) | 2020-03-10 | 2020-03-10 | Engine air inlet structure, diesel engine cylinder cover, diesel engine and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211598847U (en) |
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- 2020-03-10 CN CN202020288546.2U patent/CN211598847U/en active Active
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