CN117552883B - Engine cylinder cover and engine - Google Patents
Engine cylinder cover and engine Download PDFInfo
- Publication number
- CN117552883B CN117552883B CN202410046454.6A CN202410046454A CN117552883B CN 117552883 B CN117552883 B CN 117552883B CN 202410046454 A CN202410046454 A CN 202410046454A CN 117552883 B CN117552883 B CN 117552883B
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- China
- Prior art keywords
- engine
- cylinder cover
- engine cylinder
- roof structure
- air
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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
- F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
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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
- F02B31/04—Modifying induction systems for imparting a rotation to the charge in the cylinder by means within the induction channel, e.g. deflectors
-
- 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
-
- 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
Landscapes
- 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 an engine cylinder cover and an engine, wherein a roof structure for forming a combustion chamber with a piston and a cylinder of the engine is arranged on the bottom surface of the engine cylinder cover, two air inlets are arranged on the engine cylinder cover, the air inlets are rolling air channels, one ends of the air inlets are communicated with the roof structure, the projection of the air inlets on the bottom surface of the engine cylinder cover is taken as a trend characteristic graph of the air inlets, and an included angle between the extending direction of one end of at least one trend characteristic graph of the air inlets falling in the projection of the roof structure on the bottom surface of the engine cylinder cover and the projection of a roof ridge line of the roof structure on the bottom surface of the engine cylinder cover is smaller than 90 degrees. The air inlet channel of the engine cylinder cover enables air inlet to enter the cylinder at an inclined downward angle, and enables air flow and the cylinder wall to interact to generate vortex around the axial direction of the cylinder while forming tumble, and the tumble and the vortex are combined to form oblique axis tumble, so that effective vortex is generated while organizing the tumble, and the purposes of accelerating combustion and reducing engine emission are achieved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an engine cylinder cover and an engine.
Background
For an ignition engine, tumble is beneficial to improving the combustion speed and improving the thermal efficiency of the engine, but in the later period of combustion, the mixed gas close to the cylinder wall is low in turbulence energy, so that the combustion speed is reduced, the mixed gas is discharged without being fully combusted, and the emission of the engine exceeds the standard. The vortex can drive the air flow close to the cylinder wall to rotate so as to improve the combustion speed in the later stage of combustion and enable the combustion to be more sufficient. Therefore, the vortex is added into the tumble flow, and the exceeding of the emission standard of the engine can be effectively avoided.
However, the two air inlets of the prior art are generally arranged in parallel, which is beneficial to the air passage organization rolling flow, but the two air inlets are symmetrically arranged about the main axis of the cylinder, so that eddy components can be counteracted, and eddy is extremely difficult to generate.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide an engine cylinder head, so as to generate effective vortex flow while organizing tumble flow, thereby achieving the purposes of accelerating combustion and reducing engine emission.
A second object of the present invention is to provide an engine comprising an engine head as described above.
In order to achieve the above purpose, the present invention provides the following technical solutions:
An engine cylinder cover, the bottom surface of engine cylinder cover is provided with the roof structure that is used for enclosing the combustion chamber with piston and cylinder of engine, the engine cylinder cover is provided with two intake ducts, the intake duct is the tumble air flue, intake duct one end with roof structure intercommunication, two the projection of intake duct in the bottom surface of engine cylinder cover is the trend characteristic figure of intake duct, at least one the trend characteristic figure of intake duct falls in the direction of extension of roof structure in the projection of the bottom surface of engine cylinder cover one end, with the roof ridge line of roof structure in the projection of the bottom surface of engine cylinder cover is less than 90.
Optionally, an air inlet of the air inlet channel is arranged on the bottom surface, the side surface or the top surface of the engine cylinder cover.
Optionally, the air inlet of the air inlet channel is arranged on the side surface of the engine cylinder cover, and an included angle is formed between a roof ridge line of the roof structure and the side surface of the engine cylinder cover, on which the air inlet is arranged.
Optionally, an included angle α between a roof ridge line of the roof structure and a side surface of the engine cylinder cover, on which the air inlet is provided, satisfies 0 ° < α+.ltoreq.10°.
Optionally, the inlet throat of the inlet duct and the outlet throat of the exhaust duct of the engine cylinder head are symmetrically arranged about a roof ridge line of the roof structure.
Optionally, the extending direction of one end of the trend feature graph of the two air inlet channels falling in the projection of the roof structure on the bottom surface of the engine cylinder cover and the projection of the roof ridge line of the roof structure on the bottom surface of the engine cylinder cover are all smaller than 90 degrees.
Optionally, the trend feature patterns of the two air inlets are arranged parallel to each other.
Optionally, the trend feature patterns of the two air inlets are both curved strips.
Optionally, a plane perpendicular to and bisecting the roof ridge line of the roof structure is a longitudinal symmetry plane of the roof structure, and the air inlets of the two air inlets are located on the same side of the longitudinal symmetry plane, or the air inlet of one air inlet is located on one side of the longitudinal symmetry plane, and the plane of the air inlet of the other air inlet is intersected with the longitudinal symmetry plane.
An engine comprising an engine head as claimed in any one of the preceding claims.
It can be seen from the above technical solution that the embodiment of the present invention provides an engine cylinder cover, where a roof structure for enclosing a combustion chamber with a piston and a cylinder of the engine is provided on a bottom surface of the engine cylinder cover, the engine cylinder cover is provided with two air inlets, the air inlets are rolling air channels, one end of each air inlet is communicated with the roof structure, projections of the two air inlets on the bottom surface of the engine cylinder cover are trend feature patterns of the air inlets, and an included angle between an extending direction of at least one trend feature pattern of one air inlet falling on one end of the roof structure in a projection of the bottom surface of the engine cylinder cover and a projection of a roof ridge line of the roof structure on the bottom surface of the engine cylinder cover is smaller than 90 °.
The engine cylinder cover is used for designing the trend of the air inlet channel, so that the included angle between the extending direction of one end of at least one trend characteristic graph of the air inlet channel falling in the projection of the roof structure on the bottom surface of the engine cylinder cover and the projection of the roof ridge line of the roof structure on the bottom surface of the engine cylinder cover is smaller than 90 degrees, the air inlet channel enables air inlet to enter the cylinder at an inclined downward angle to form a tumble, and meanwhile, the air flow and the cylinder wall interact to generate a vortex around the axial direction of the cylinder, and the tumble and the vortex are compounded to form an inclined axis tumble, thereby realizing the generation of effective vortex while organizing the tumble, and achieving the purposes of accelerating combustion and reducing engine emission.
The invention also provides an engine, which comprises the engine cylinder cover, and the engine adopts the engine cylinder cover, so that the engine has the same beneficial effects as the engine cylinder cover and is not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a partial top view of an engine head in an embodiment of the invention.
In the illustration, 1 is a roof structure; 2 is roof ridge line; 3 is an air inlet channel; 4 is an exhaust passage; and 5 is a longitudinal symmetry plane.
Detailed Description
The invention discloses an engine cylinder cover, which is structurally designed to organize tumble and generate effective vortex so as to achieve the purposes of accelerating combustion and reducing engine emission.
The invention also discloses an engine comprising the engine cylinder cover.
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a partial top view of an engine head according to an embodiment of the present invention.
According to the engine cylinder cover disclosed by the embodiment of the invention, the roof structure 1 for forming a combustion chamber with a piston and a cylinder of an engine is arranged on the bottom surface of the engine cylinder cover, the roof structure 1 arches in a direction away from the bottom surface of the engine cylinder cover, the engine cylinder cover is provided with two air inlets 3, each air inlet 3 is a rolling air passage, each rolling air passage is generally composed of a flow guiding section and a flow guiding section which are sequentially connected along an air inlet direction, each flow guiding section is obliquely downwards arranged, namely, each flow guiding section is arranged at an included angle smaller than 90 degrees with the bottom surface of the engine cylinder cover, one end of each air inlet 3 is communicated with the roof structure 1, the projection of each air inlet 3 on the bottom surface of the engine cylinder cover is a trend feature pattern of the air inlet 3, the trend feature pattern of at least one air inlet 3 falls in the extending direction of one end of the roof structure 1 in the projection of the bottom surface of the engine cylinder cover, the included angle of the projection of each roof ridge line 2 of the roof structure 1 on the bottom surface of the engine cylinder cover is smaller than 90 degrees, so that air inlet of the two air inlets 3 do not symmetrically enter the cylinder cover in a symmetrical manner about the longitudinal symmetry plane 5 of the roof structure 1, and the plane of the roof ridge line 2 of the roof structure 1 is the longitudinal symmetry plane 5 of the roof structure.
Compared with the prior art, the engine cylinder cover provided by the embodiment of the invention designs the trend of the air inlet channel 3, so that the trend characteristic pattern of at least one air inlet channel 3 falls in the extending direction of one end of the roof structure 1 in the projection of the bottom surface of the engine cylinder cover, and the included angle between the trend characteristic pattern and the projection of the roof ridge line 2 of the roof structure 1 on the bottom surface of the engine cylinder cover is smaller than 90 degrees, thus the air inlet channel 3 enables air inlet to enter the cylinder at an inclined downward angle to form a tumble, and simultaneously enables air flow and the cylinder wall to interact to generate vortex around the axial direction of the cylinder, and the tumble and the vortex are combined to form an inclined axis tumble, thereby realizing the purpose of accelerating combustion and reducing engine emission while organizing the tumble.
Preferably, in the embodiment of the present invention, the air inlet of the air inlet channel 3 is disposed on the bottom surface, the side surface or the top surface of the engine cylinder cover, so that the installation and arrangement of engines of different types are facilitated, and the overall shape of the air inlet channel 3 needs to be adjusted correspondingly according to different setting positions of the air inlet channel 3.
Further optimizing the above technical solution, as shown in fig. 1, in the embodiment of the present invention, the air inlet of the air inlet channel 3 is disposed on the side surface of the engine cylinder cover, and the roof ridge line 2 of the roof structure 1 and the side surface of the engine cylinder cover on which the air inlet is disposed are disposed at an included angle, so as to adjust the guiding direction of the roof structure 1 on the air inlet, so as to further facilitate the formation of vortex.
Specifically, as shown in fig. 1, in the embodiment of the present invention, the angle α between the roof ridge line 2 of the roof structure 1 and the side surface of the engine head where the intake port is provided satisfies 0 ° < α+.ltoreq.10°.
Preferably, in the embodiment of the present invention, as shown in fig. 1, the intake throat of the intake duct 3 and the exhaust throat of the exhaust duct 4 of the engine head are symmetrically arranged about the roof ridge line 2 of the roof structure 1.
Further, the angles between the extending direction of the trend feature pattern of the two air inlets 3 at one end of the roof structure 1 in the projection of the bottom surface of the engine cylinder cover and the projection of the roof ridge line 2 of the roof structure 1 on the bottom surface of the engine cylinder cover are smaller than 90 degrees.
In one embodiment of the present invention, the trend feature patterns of the two air inlets 3 are all straight strips, and the trend feature patterns of the two air inlets 3 are parallel to each other, however, in another embodiment, the trend feature patterns of the two air inlets 3 may not be parallel, i.e. the trend feature patterns of the two air inlets 3 are both straight strips, and the trend feature patterns of the two air inlets 3 are arranged at an included angle.
In another embodiment of the present invention, the trend feature patterns of the two air inlets 3 are both curved strips, that is, the trend feature patterns of the air inlets 3 may be arc strips with a single curvature, or may be formed by smoothly connecting a plurality of arc strips with different curvatures, further, as shown in fig. 1, the trend feature patterns of the two air inlets 3 are arc strips with a single curvature.
Further optimizing the above technical solution, in the embodiment of the present invention, the plane perpendicular to and bisecting the roof ridge line 2 of the roof structure 1 is the longitudinal symmetry plane 5 of the roof structure 1, the air inlets of the two air inlets 3 are both located at the same side of the longitudinal symmetry plane 5, or the air inlet of one air inlet 3 is located at one side of the longitudinal symmetry plane 5, and the plane where the air inlet of the other air inlet 3 is located intersects with the longitudinal symmetry plane 5, i.e. the two air inlets 3 deflect a preset angle in the same direction with respect to the longitudinal symmetry plane 5.
The embodiment of the invention also provides an engine, which comprises the engine cylinder cover according to the embodiment, and the engine adopts the engine cylinder cover according to the embodiment, so that the technical effect of the engine is that the engine is referred to the embodiment.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and inventive features disclosed herein.
Claims (7)
1. The engine cylinder cover is characterized in that a roof structure used for forming a combustion chamber with a piston and a cylinder of an engine is arranged on the bottom surface of the engine cylinder cover, two air inlets are arranged on the engine cylinder cover, the air inlets are rolling air channels, one ends of the air inlets are communicated with the roof structure, the projection of the air inlets on the bottom surface of the engine cylinder cover is a trend characteristic graph of the air inlets, at least one trend characteristic graph of the air inlets falls in the extending direction of one end of the roof structure in the projection of the bottom surface of the engine cylinder cover, and an included angle between the trend characteristic graph of the air inlets and the projection of a roof ridge line of the roof structure on the bottom surface of the engine cylinder cover is smaller than 90 degrees;
the included angles between the extending directions of the trend feature patterns of the two air inlet channels, which fall on one end of the roof structure in the projection of the bottom surface of the engine cylinder cover, and the projection of the roof ridge line of the roof structure on the bottom surface of the engine cylinder cover are smaller than 90 degrees, and the trend feature patterns of the two air inlet channels are mutually parallel;
And the air inlet throat of the air inlet channel and the air outlet throat of the air outlet channel of the engine cylinder cover are symmetrically arranged about a roof ridge line of the roof structure.
2. The engine head of claim 1, wherein the intake port of the intake port is disposed on a bottom, side, or top surface of the engine head.
3. The engine cylinder head of claim 1, wherein the air inlet of the air inlet channel is arranged on the side surface of the engine cylinder head, and an included angle is formed between a roof ridge line of the roof structure and the side surface of the engine cylinder head on which the air inlet is arranged.
4. An engine head according to claim 3, characterized in that the angle α between the roof ridge line of the roof structure and the side of the engine head where the air intake is provided satisfies 0 ° < α+.ltoreq.10°.
5. The engine head according to any one of claims 1-4, wherein the trend feature patterns of both of the intake passages are curved bars.
6. The engine head according to any one of claims 1-4, wherein a plane perpendicular to and bisecting a roof ridge line of the roof structure is a longitudinal symmetry plane of the roof structure, and wherein the intake ports of both intake ports are located on the same side of the longitudinal symmetry plane, or wherein the intake port of one intake port is located on one side of the longitudinal symmetry plane, and wherein the plane of the intake port of the other intake port intersects the longitudinal symmetry plane.
7. An engine comprising an engine head according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410046454.6A CN117552883B (en) | 2024-01-12 | 2024-01-12 | Engine cylinder cover and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410046454.6A CN117552883B (en) | 2024-01-12 | 2024-01-12 | Engine cylinder cover and engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117552883A CN117552883A (en) | 2024-02-13 |
| CN117552883B true CN117552883B (en) | 2024-05-17 |
Family
ID=89820950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410046454.6A Active CN117552883B (en) | 2024-01-12 | 2024-01-12 | Engine cylinder cover and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117552883B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06117250A (en) * | 1992-09-30 | 1994-04-26 | Mazda Motor Corp | Two-point ignition engine |
| JPH11107760A (en) * | 1997-09-30 | 1999-04-20 | Mazda Motor Corp | Intake system for direct-injection engine |
| JP2010077858A (en) * | 2008-09-25 | 2010-04-08 | Mazda Motor Corp | Method for designing spark-ignition internal combustion engine, and method for manufacturing the same |
| CN102392752A (en) * | 2011-11-28 | 2012-03-28 | 天津内燃机研究所 | Air-path structure for small universal gasoline engines |
| CN113685264A (en) * | 2021-08-25 | 2021-11-23 | 天津大学 | Heavy natural gas engine combustion system |
| CN115419501A (en) * | 2022-10-19 | 2022-12-02 | 天津大学 | Engine combustion system with air inlet channel, cylinder cover and combustion chamber in cooperation |
-
2024
- 2024-01-12 CN CN202410046454.6A patent/CN117552883B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06117250A (en) * | 1992-09-30 | 1994-04-26 | Mazda Motor Corp | Two-point ignition engine |
| JPH11107760A (en) * | 1997-09-30 | 1999-04-20 | Mazda Motor Corp | Intake system for direct-injection engine |
| JP2010077858A (en) * | 2008-09-25 | 2010-04-08 | Mazda Motor Corp | Method for designing spark-ignition internal combustion engine, and method for manufacturing the same |
| CN102392752A (en) * | 2011-11-28 | 2012-03-28 | 天津内燃机研究所 | Air-path structure for small universal gasoline engines |
| CN113685264A (en) * | 2021-08-25 | 2021-11-23 | 天津大学 | Heavy natural gas engine combustion system |
| CN115419501A (en) * | 2022-10-19 | 2022-12-02 | 天津大学 | Engine combustion system with air inlet channel, cylinder cover and combustion chamber in cooperation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117552883A (en) | 2024-02-13 |
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