CN115234397A - Novel air inlet tumble structure of engine - Google Patents
Novel air inlet tumble structure of engine Download PDFInfo
- Publication number
- CN115234397A CN115234397A CN202210795000.XA CN202210795000A CN115234397A CN 115234397 A CN115234397 A CN 115234397A CN 202210795000 A CN202210795000 A CN 202210795000A CN 115234397 A CN115234397 A CN 115234397A
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- Prior art keywords
- engine
- air inlet
- intake
- tumble
- cylinder body
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4285—Shape or arrangement of intake or exhaust channels in cylinder heads of both intake and exhaust channel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a novel air inlet tumble structure of an engine, which comprises: the engine cylinder comprises an engine cylinder body, an air inlet channel, an exhaust valve, an air inlet valve and an eccentric counterbore. A piston is arranged in the engine cylinder body, and the top of the engine cylinder body is a plane. The air inlet passage is arranged on the top of the cylinder body of the engine cylinder. The exhaust passage is arranged on the top of the cylinder body of the engine cylinder, and the exhaust passage and the air inlet passage are symmetrically arranged. The exhaust valve is arranged at the end part of the exhaust passage. The air inlet valve is arranged at the end part of the air inlet channel and is higher than the exhaust valve. And the eccentric counter bore is arranged below the air inlet valve. Therefore, the novel air inlet tumble structure of the engine is simple and reasonable in structure, improves the tumble effect, does not cause the height of the cylinder cover to be increased, and further does not cause difficulty or influence on the arrangement of the air distribution mechanism at the top of the cylinder cover.
Description
Technical Field
The invention relates to the technical field of piston type internal combustion engines, in particular to a novel air inlet tumble structure of an engine.
Background
The piston type internal combustion engine pushes a piston to reciprocate in a cylinder hole by means of the explosion pressure of fuel, and then converts linear motion into rotary motion through a crank mechanism to output torque. In order to improve the performance of the piston type internal combustion engine, the inlet air flow needs to be organized, and the air flow movement mode in the cylinder is divided into a vortex mode and a tumble mode. Organized airflow movement about the cylinder axis, known as swirl, created during intake is commonly used in diesel engines; the air flow is one of the air flow movements in the cylinder, and the air flow direction is perpendicular to the axis of the cylinder, so the air flow is called tumble flow and is widely used for gasoline engines and gas engines.
As shown in fig. 1, at present, tumble flow is mainly obtained by means of a roof combustion chamber, that is, the top of the combustion chamber (an engine cylinder block 1) is made into an inverted bowl-shaped space, an intake valve 6 is obliquely arranged, intake air mainly passes through the intake valve 6, then downwards rushes along the cylinder wall on the intake side, turns back to the exhaust side after reaching the top of a piston 2, upwards moves along the cylinder wall on the exhaust side, and flows to an exhaust valve 5; and a small amount of intake air forms micro-tumble and then directly flows to the exhaust valve 5. And an air guide screen or an air guide edge is arranged on the air inlet valve 6 or the top surface of the piston 2 to enhance the tumble effect, but the key is that a combustion chamber is required to be topped, and the air inlet valve 6 is arranged obliquely. Although a good tumble effect can be obtained by the structure, the air inlet tends to be downwards inclined, the air inlet channel needs to be closer to a vertical angle than the air inlet channel of the vortex, so that the height of the cylinder cover is increased, and the arrangement of a valve mechanism and the like at the top of the cylinder cover is difficult or influenced due to the high inlet position of the air inlet channel 3 and the obliquely arranged air inlet valve 6.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a novel air inlet tumble structure of an engine, which is simple and reasonable in structure, improves tumble effect, does not cause the height of a cylinder cover to be increased, and further does not cause difficulty or influence on the arrangement of a valve mechanism at the top of the cylinder cover.
In order to achieve the above object, the present invention provides a novel intake tumble structure of an engine, comprising: the engine cylinder comprises an engine cylinder body, an air inlet channel, an exhaust valve, an air inlet valve and an eccentric counterbore. A piston is arranged in the engine cylinder body, and the top of the engine cylinder body is a plane. The air inlet passage is arranged on the top of the cylinder body of the engine cylinder. The exhaust passage is arranged on the top of the cylinder body of the engine cylinder, and the exhaust passage and the air inlet passage are symmetrically arranged. The exhaust valve is arranged at the end part of the exhaust passage. The intake valve sets up in the tip of intake duct, and the intake valve is higher than the exhaust valve. And the eccentric counter bore is arranged below the air inlet valve.
In one embodiment of the invention, an eccentric chamfer is arranged at the outlet of the eccentric counterbore.
In an embodiment of the invention, the novel intake tumble structure of the engine further comprises an intake valve seat ring which is arranged on the end part of the intake passage.
In one embodiment of the invention, the intake valve seat ring is located above the eccentric counterbore.
In an embodiment of the invention, the novel intake tumble structure of the engine further comprises an exhaust valve seat ring which is arranged on the end part of the exhaust passage.
In one embodiment of the invention, the exhaust valve seat insert is lower than the intake valve seat insert.
In one embodiment of the invention, the top surface of the piston is planar.
In one embodiment of the invention, the eccentric counterbore is used to allow intake air to move down the cylinder wall, thereby creating tumble flow.
Compared with the prior art, the novel air inlet tumble structure of the engine is simple and reasonable in structure, improves the tumble effect, does not cause the height of the cylinder cover to be increased, and further does not cause difficulty or influence on the arrangement of the air distribution mechanism at the top of the cylinder cover.
Drawings
Fig. 1 is a front view structural schematic diagram of a conventional intake tumble structure.
Fig. 2 is a schematic front view of a novel intake tumble structure of an engine according to an embodiment of the present invention.
Description of the main reference numerals:
1-an engine cylinder body, 2-a piston, 3-an air inlet channel, 4-an exhaust channel, 5-an exhaust valve, 6-an intake valve, 7-an eccentric counter bore, 8-an eccentric oblique chamfer, 9-an intake valve seat ring and 10-an exhaust valve seat ring.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Fig. 2 is a front view structural schematic diagram of a novel intake tumble structure of an engine according to an embodiment of the present invention. As shown in fig. 2, a novel intake tumble structure of an engine according to a preferred embodiment of the present invention includes: the engine comprises an engine cylinder body 1, an air inlet channel 3, an exhaust channel 4, an exhaust valve 5, an inlet valve 6 and an eccentric counterbore 7. A piston 2 is arranged in the engine cylinder body, and the top of the engine cylinder body 1 is a plane. The inlet channel 3 is arranged on top of the engine cylinder block 1. The exhaust passage 4 is arranged on the top of the engine cylinder body 1, and the exhaust passage 4 and the air inlet passage 3 are symmetrically arranged. An exhaust valve 5 is provided at the end of the exhaust passage 4. The intake valve 6 is provided at an end of the intake passage 3, and the intake valve 6 is higher than the exhaust valve 5. And an eccentric counterbore 7 is provided below the inlet valve 6.
In one embodiment of the invention, an eccentric chamfer 8 is provided at the outlet of the eccentric counterbore 7.
In an embodiment of the invention, the novel intake tumble structure of the engine further comprises an intake valve seat ring 9 which is arranged on the end part of the intake passage 3.
In one embodiment of the invention, the inlet valve seat insert 9 is located above the eccentric counterbore 7.
In an embodiment of the present invention, the novel intake tumble structure of the engine further includes an exhaust valve seat 10 disposed on an end portion of the exhaust passage 4.
In one embodiment of the invention the exhaust valve seat insert 10 is lower than the inlet valve seat insert 9.
In one embodiment of the invention, the top surface of the piston 2 is planar.
In one embodiment of the invention, the eccentric counterbore 7 is used to allow intake air to move down the cylinder wall, thereby creating tumble flow.
In practical application, the novel air inlet tumble structure of the engine provided by the invention has the advantages that the air inlet valve 6 and the air inlet valve seat ring 9 are lifted at the outlet of the air inlet channel 3, and the eccentric counter bore 7 is machined below the air inlet valve 6. When air is fed, the air inlet forms a downward movement along the cylinder wall by the guiding and shielding effect of the air inlet valve 6 and the eccentric counterbore 7 below the air inlet valve, so that tumble flow is formed. In addition, an eccentric bevel chamfer 8 can be arranged at the outlet of the eccentric counterbore 7, so that the tumble effect is further enhanced. The ideal tumble effect can be obtained by properly adjusting the eccentric position, the eccentric amount, the eccentric chamfer and the gas distribution phase, and the performance of the engine is improved.
In a word, the novel air inlet tumble structure of the engine is simple and reasonable in structure, on the basis of the air inlet channel 3 of the traditional diesel engine cylinder cover, the position of the air inlet valve 6 is only raised, the total height of the air inlet channel 3 is unchanged, the air inlet valve 6 is also vertically arranged, the height of the cylinder cover and the air distribution mechanism can be unchanged, the tumble scavenging effect can be realized, and the novel air inlet tumble structure is suitable for engines adopting tumble air inlet, such as a gas engine, a two-stroke diesel engine and the like. And the structure parameters can be flexibly adjusted, different tumble effects can be obtained, and different performance development requirements can be met.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (8)
1. A novel intake tumble structure of an engine is characterized by comprising:
the engine cylinder comprises an engine cylinder body, wherein a piston is arranged in the engine cylinder body, and the top of the engine cylinder body is a plane;
the air inlet channel is arranged on the top of the engine cylinder body;
the exhaust passage is arranged on the top of the cylinder body of the engine cylinder, and the exhaust passage and the air inlet passage are symmetrically arranged;
the exhaust valve is arranged at the end part of the exhaust passage;
the intake valve is arranged at the end part of the air inlet channel and is higher than the exhaust valve; and
and the eccentric counter bore is arranged below the inlet valve.
2. The novel intake tumble structure of engine as set forth in claim 1, characterized in that an eccentric chamfer is provided at the outlet of said eccentric counterbore.
3. The novel intake tumble flow structure of engine according to claim 1, characterized by further comprising an intake valve seat ring provided on an end portion of said intake passage.
4. The novel intake tumble flow structure of engine according to claim 3, characterized in that said intake valve seat ring is located above said eccentric counterbore.
5. The novel intake tumble flow structure of engine as set forth in claim 3, further comprising an exhaust valve seat ring provided on an end portion of said exhaust passage.
6. The novel intake tumble flow structure of engine as set forth in claim 5, characterized in that said exhaust valve seat ring is lower than said intake valve seat ring.
7. The novel intake tumble structure of engine as set forth in claim 1, characterized in that the top surface of said piston is flat.
8. The novel intake tumble structure of the engine according to claim 1, characterized in that said eccentric counterbore is used to let the intake air move down the cylinder wall, thereby forming a tumble flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210795000.XA CN115234397A (en) | 2022-07-07 | 2022-07-07 | Novel air inlet tumble structure of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210795000.XA CN115234397A (en) | 2022-07-07 | 2022-07-07 | Novel air inlet tumble structure of engine |
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| Publication Number | Publication Date |
|---|---|
| CN115234397A true CN115234397A (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210795000.XA Pending CN115234397A (en) | 2022-07-07 | 2022-07-07 | Novel air inlet tumble structure of engine |
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| CN (1) | CN115234397A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116378845A (en) * | 2023-06-07 | 2023-07-04 | 潍柴动力股份有限公司 | Cylinder head, combustion chamber, design method of combustion chamber and engine |
-
2022
- 2022-07-07 CN CN202210795000.XA patent/CN115234397A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116378845A (en) * | 2023-06-07 | 2023-07-04 | 潍柴动力股份有限公司 | Cylinder head, combustion chamber, design method of combustion chamber and engine |
| CN116378845B (en) * | 2023-06-07 | 2023-09-19 | 潍柴动力股份有限公司 | Cylinder head, combustion chamber, design method of combustion chamber and engine |
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