CN114183235B - Internal combustion engine - Google Patents
Internal combustion engine Download PDFInfo
- Publication number
- CN114183235B CN114183235B CN202210132785.2A CN202210132785A CN114183235B CN 114183235 B CN114183235 B CN 114183235B CN 202210132785 A CN202210132785 A CN 202210132785A CN 114183235 B CN114183235 B CN 114183235B
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- Prior art keywords
- combustion chamber
- cylinder
- flow guide
- piston
- combustion engine
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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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
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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
- F02F3/00—Pistons
-
- 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
- F02F3/00—Pistons
- F02F3/26—Pistons having combustion chamber in piston head
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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 relates to the technical field of internal combustion engines, and discloses an internal combustion engine, which comprises: the cylinder body is provided with a cylinder barrel; the cylinder sleeve is arranged in the cylinder barrel; a piston telescopically arranged in the cylinder sleeve; the cylinder cover is covered on the cylinder barrel; a combustion chamber located on the piston and the cylinder head; the water conservancy diversion portion, set up in the combustion chamber, be used for the restriction fluid in the combustion chamber passes through the piston with flow direction between the cylinder cap the cylinder liner, and then can avoid combustible gas mixture to be in near expansion, the burning of cylinder liner have been avoided the cylinder liner bears the high temperature load and the condition of wearing and tearing deformation for a long time, has guaranteed the power and the fuel economy of internal-combustion engine, has prolonged the life of internal-combustion engine.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to an internal combustion engine.
Background
With increasing of engine power, engine thermal load is also greatly increased, especially with increasing of compression ratio, the highest explosion pressure is limited by that structural strength cannot reach a level required by high compression ratio, advance angle is required to be delayed to reduce the explosion pressure, and due to Nox (Nitrogen oxide) emission requirements, advance angle is required to be delayed to reduce Nox emission for some engine types, which all can lead to delay of oil injection end time, combustible mixed gas near a cylinder sleeve is increased, the cylinder sleeve bears high temperature load for a long time, and great influence is generated on mechanical performance and deformation resistance of materials, so that thermal fatigue is generated to directly influence engine performance.
The engine cylinder liner, which is an important component of an engine cylinder, operates under high temperature, high pressure, alternating load and corrosion conditions, and as a result, the cylinder liner is worn and deformed, which affects the dynamic performance, the economical efficiency and the service life of the engine. At present, for the research of the existing engine, the reason of abrasion deformation of the cylinder sleeve is seriously analyzed, and the method has very important significance for improving the use economy of the engine. During the long-term operation of the engine, the combustible mixture expands and burns near the cylinder liner, which generates great pressure and thermal impact on the cylinder liner, thereby causing inevitable wear.
Disclosure of Invention
The invention provides an internal combustion engine, which comprises a cylinder cover, a piston, a flow guide part and a combustion chamber positioned on the piston and the cylinder cover, wherein the flow of fluid in the combustion chamber to the vicinity of a cylinder sleeve is limited by the arrangement of the flow guide part, so that the problems that the power and the fuel economy of the internal combustion engine are reduced and the service life of the internal combustion engine is shortened due to the abrasion and the deformation of the cylinder sleeve of the internal combustion engine in the prior art are solved.
In order to solve the above technical problem, the present invention provides an internal combustion engine, comprising: the cylinder body is provided with a cylinder barrel; the cylinder sleeve is arranged in the cylinder barrel; a piston telescopically arranged in the cylinder sleeve; the cylinder cover is covered on the cylinder barrel; a combustion chamber located on the piston and the cylinder head; and the flow guide part is arranged in the combustion chamber and is used for limiting the fluid in the combustion chamber to flow to the cylinder sleeve through the space between the piston and the cylinder cover.
Preferably, the combustion chamber includes: the first combustion chamber is arranged on the cylinder cover; a second combustion chamber provided in the piston; the flow guide portion is also used for guiding the fluid in the combustion chamber to flow to the first combustion chamber and the second combustion chamber.
Preferably, the flow guide portion is located on a side wall of the first combustion chamber.
Preferably, the piston includes: and the limiting part is positioned at the bottom of the combustion chamber and used for limiting the fluid in the combustion chamber to flow to the flow guide part when the piston moves downwards from the top dead center.
Preferably, the combustion chamber includes: the first cavity is adjacent to the flow guide portion and located in the first combustion chamber, and the wall of the first cavity extends towards the outer side face of the cylinder cover.
Preferably, the wall of the first cavity is connected with the flow guide part, and the joint of the wall of the first cavity and the flow guide part is an arc surface.
Preferably, the combustion chamber further comprises: and the second cavity is arranged adjacent to the flow guide part and is positioned in the first combustion chamber and the second combustion chamber, and the wall of the second cavity extends towards the direction of the cylinder sleeve.
Preferably, the wall of the second cavity is connected with the flow guide part, and the joint of the wall of the second cavity and the flow guide part is an arc surface.
Preferably, the guide portion includes: the flow guide protrusion is connected to the cylinder cover, and the free end of the flow guide protrusion extends towards the middle of the combustion chamber.
Preferably, the surface of the flow guide protrusion in the combustion chamber is an arc surface.
The present invention provides an internal combustion engine, comprising: the cylinder body is provided with a cylinder barrel; the cylinder sleeve is arranged in the cylinder barrel; a piston telescopically arranged in the cylinder sleeve; the cylinder cover is covered on the cylinder barrel; a combustion chamber located on the piston and the cylinder head; the water conservancy diversion portion, set up in the combustion chamber, be used for the restriction fluid in the combustion chamber passes through the piston with flow direction between the cylinder cap the cylinder liner, and then can avoid combustible gas mixture to be in near expansion, the burning of cylinder liner have been avoided the cylinder liner bears the high temperature load and the condition of wearing and tearing deformation for a long time, has guaranteed the power and the fuel economy of internal-combustion engine, has prolonged the life of internal-combustion engine.
Drawings
FIG. 1 is a schematic view of a connection structure of a cylinder cover, a piston, a cylinder sleeve and a flow guide part in an embodiment of the invention;
FIG. 2 is a schematic view of a connection structure of a cylinder cover, a piston, a cylinder sleeve and a flow guide protrusion in the embodiment of the invention;
FIG. 3 is a schematic view of the flow path of a fluid or combustible mixture in an embodiment of the invention;
fig. 4 is an enlarged schematic view at "a" in fig. 3.
In the figure, the position of the upper end of the main shaft,
1. a cylinder liner;
2. a piston; 21. a limiting part;
3. a cylinder cover; 31. an oil injector;
4. a combustion chamber; 41. a first combustion chamber; 42. a second combustion chamber; 43. a first cavity; 44. a second cavity;
5. a flow guide part; 51. and (4) flow guide bulges.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1, an embodiment of the present invention provides an internal combustion engine including: the cylinder body is provided with a cylinder barrel; the cylinder sleeve 1 is arranged in the cylinder barrel; the piston 2 is telescopically arranged in the cylinder sleeve 1; the cylinder cover 3 covers the cylinder barrel; a combustion chamber 4 located on the piston 2 and the cylinder head 3; the flow guide part 5 is arranged in the combustion chamber 4 and used for limiting fluid in the combustion chamber 4 to flow to the cylinder sleeve 1 through the piston 2 and the cylinder cover 3, so that combustible mixed gas can be prevented from expanding and burning near the cylinder sleeve 1, the condition that the cylinder sleeve 1 bears high-temperature load for a long time and is worn and deformed is avoided, the power and the fuel economy of the internal combustion engine are guaranteed, and the service life of the internal combustion engine is prolonged.
As shown in fig. 1, in one embodiment of the present invention, the internal combustion engine further includes an injector 31, where the injector 31 is disposed on the cylinder head, and the injector is used for injecting fuel into the combustion chamber 4, and the fuel and clean air introduced into the combustion chamber 4 are mixed to form a combustible mixture, i.e., fluid in the combustion chamber 4.
As shown in fig. 1, in one embodiment of the present invention, the combustion chamber 4 includes: a first combustion chamber 41 provided in the cylinder head 3; a second combustion chamber 42 provided in the piston 2; the flow guide portion 5 is also used for guiding the fluid in the combustion chamber 4 to the first combustion chamber 41 and the second combustion chamber 42.
It should be noted that, as shown in fig. 3 and 4, due to the arrangement of the flow guide portion 5, a part of the fluid in the combustion chamber 4 can be guided to flow to the first combustion chamber 41, another part can be guided to flow to the second combustion chamber 42, and further the fluid in the combustion chamber 4 does not flow to the vicinity of the cylinder liner 1 through the space between the piston 2 and the cylinder head 3, so that the combustible gas mixture can be prevented from expanding and burning near the cylinder liner 1, the condition that the cylinder liner 1 is worn and deformed due to long-term high-temperature load bearing is avoided, the power and fuel economy of the internal combustion engine is ensured, and the service life of the internal combustion engine is prolonged.
As shown in fig. 1, in one embodiment of the present invention, the flow guide portion 5 is located on a sidewall of the first combustion chamber 41.
As shown in fig. 2, in one embodiment of the present invention, the piston 2 includes: and a limiting part 21, which is located at the bottom of the combustion chamber 4, specifically at the bottom of the second combustion chamber 42, and is used for limiting the fluid in the combustion chamber 4 to flow to the flow guide part 5 when the piston 2 moves downwards from the top dead center, as shown in fig. 3 and 4.
It should be noted that, as shown in fig. 3 and 4, since the space volume of the combustion chamber 4 in the prior art is large, in order to ensure the uniformity of the combustible mixture in the combustion chamber 4, ensure the optimization of the acting force of the combustible mixture on the piston 2 after combustion, and ensure the fuel economy of the internal combustion engine, the limiting portion 21 is arranged at the bottom of the second combustion chamber 42, and at the same time, when the internal combustion engine starts a power stroke after a compression stroke and the piston 2 moves downward from a top dead center, a space for flowing the combustible gas is formed between the limiting portion 21 and the cylinder head 3, so that the fluid or the combustible mixture in the combustion chamber 4 can flow to the flow guide portion 5.
The stopper 21 includes, but is not limited to, a projection structure.
As shown in fig. 1, in one embodiment of the present invention, the combustion chamber 4 includes: the first cavity 43 is disposed adjacent to the flow guide portion 5 and located in the first combustion chamber 41, and a wall of the first cavity 43 extends toward an outer side surface of the cylinder head 3.
It should be noted that the wall of the first cavity 43 extends towards the outer side of the cylinder head 3, so as to enlarge the space volume of the combustion chamber 4, ensure the amount of the combustible mixture in the first cavity 43, ensure the combustible mixture to burn relative to the top of the piston 2 and generate the acting force of the optimal acting point, and ensure the fuel economy of the internal combustion engine.
As shown in fig. 1 and 2, in one embodiment of the present invention, the wall of the first cavity 43 is connected to the flow guide part 5, and the connection between the wall of the first cavity 43 and the flow guide part 5 is a curved surface.
It should be noted that the wall of the first cavity 43 is connected to the flow guide portion 5, and the joint of the wall of the first cavity 43 and the flow guide portion 5 is an arc surface, which ensures that the flow guide portion 5 can smoothly guide the fluid or the combustible mixture in the combustion chamber 4 to the first combustion chamber 41 or the first cavity 43.
As shown in fig. 1 and 2, in one embodiment of the present invention, the combustion chamber 4 further includes: the second cavity 44, which is disposed adjacent to the flow guide 5, is located in the first combustion chamber 41 and the second combustion chamber 42, and the wall of the second cavity 44 extends in the direction of the liner 1.
It should be noted that the wall of the second cavity 44 extends towards the direction of the cylinder liner 1, so as to enlarge the space volume of the combustion chamber 4, ensure the amount of the combustible mixture gas of the second cavity 44, ensure the combustible mixture gas to burn at the edge part close to the top of the piston 2 and generate the acting force of the optimal acting point, and ensure the fuel economy of the internal combustion engine.
As shown in fig. 1 and 2, in one embodiment of the present invention, the wall of the second cavity 44 is connected to the flow guide part 5, and the connection between the wall of the second cavity 44 and the flow guide part 5 is a curved surface.
It should be noted that the wall of the second cavity 44 is connected to the flow guide portion 5, and the joint between the wall of the second cavity 44 and the flow guide portion 5 is an arc surface, which ensures that the flow guide portion 5 can smoothly guide the fluid or the combustible mixture in the combustion chamber 4 to the second combustion chamber 42 or the second cavity 44, and due to the design of the arc surface, reduces the occurrence of the condition that the fluid or the combustible mixture in the combustion chamber 4 flows to the vicinity of the cylinder liner 1 toward the space between the piston 2 and the cylinder head 3, avoids the condition that the combustible mixture expands and burns in the vicinity of the cylinder liner 1, and avoids the condition that the cylinder liner 1 is worn and deformed due to bearing a high-temperature load for a long time, thereby ensuring the power and fuel economy of the internal combustion engine, and prolonging the service life of the internal combustion engine.
As shown in fig. 2, in one embodiment of the present invention, the flow guide part 5 includes: and the flow guide protrusion 51 is connected to the cylinder cover 3, and the free end of the flow guide protrusion 51 extends towards the middle of the combustion chamber 4, or the free end of the flow guide protrusion 51 extends towards the direction of the fuel injector 31, so that the flow guide part 5 can separate the fluid or combustible mixture flowing in the combustion chamber 4 and along the limiting part 21 and the cylinder cover 3, and guide one part of the fluid or combustible mixture into the first combustion chamber 41 or the first cavity 43, and guide the other part of the fluid or combustible mixture into the second combustion chamber 42 or the second cavity 44.
As shown in fig. 2, in one embodiment of the present invention, the surface of the guide protrusion 51 located in the combustion chamber 4 is a cambered surface.
It should be noted that the cambered surface of the flow guide protrusion 51 in the combustion chamber 4 can ensure the stability and the fluency of the separation of the fluid or the combustible gas mixture which flows to the flow guide part 5 from the front, as shown in fig. 4.
In summary, embodiments of the present invention provide an internal combustion engine, comprising: the cylinder body is provided with a cylinder barrel; the cylinder sleeve is arranged in the cylinder barrel; the piston is telescopically arranged in the cylinder sleeve; the cylinder cover is covered on the cylinder barrel; the combustion chamber is positioned on the piston and the cylinder cover; the flow guide part is arranged in the combustion chamber and used for limiting fluid in the combustion chamber to flow to the cylinder sleeve through the piston and the cylinder cover, so that the combustible mixed gas can be prevented from expanding and burning near the cylinder sleeve, the condition that the cylinder sleeve bears high-temperature load for a long time and is abraded and deformed is avoided, the power and the fuel economy of the internal combustion engine are ensured, and the service life of the internal combustion engine is prolonged.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. An internal combustion engine, comprising:
the cylinder body is provided with a cylinder barrel;
the cylinder sleeve is arranged in the cylinder barrel;
a piston telescopically arranged in the cylinder sleeve;
the cylinder cover is covered on the cylinder barrel;
the combustion chamber is positioned on the piston and the cylinder cover and comprises a first combustion chamber and a second combustion chamber, the first combustion chamber is arranged on the cylinder cover, and the second combustion chamber is arranged on the piston;
the flow guide part is arranged in the combustion chamber, is used for limiting the fluid in the combustion chamber to flow to the cylinder sleeve through the space between the piston and the cylinder cover, and is also used for guiding the fluid in the combustion chamber to flow to the first combustion chamber and the second combustion chamber, and comprises:
the flow guide protrusion is connected to the cylinder cover, and the free end of the flow guide protrusion extends towards the middle of the combustion chamber.
2. The internal combustion engine of claim 1, wherein the flow guide is located on a sidewall of the first combustion chamber.
3. The internal combustion engine of claim 1, wherein the piston comprises:
and the limiting part is positioned at the bottom of the combustion chamber and used for limiting the fluid in the combustion chamber to flow to the flow guide part when the piston moves downwards from the top dead center.
4. The internal combustion engine of claim 1, wherein the combustion chamber comprises:
the first cavity is adjacent to the flow guide portion and located in the first combustion chamber, and the wall of the first cavity extends towards the outer side face of the cylinder cover.
5. The internal combustion engine of claim 4, wherein the wall of the first cavity is connected to the flow guide, and the connection of the wall of the first cavity to the flow guide is an arc surface.
6. The internal combustion engine of claim 1, wherein the combustion chamber further comprises:
and the second cavity is arranged adjacent to the flow guide part and is positioned in the first combustion chamber and the second combustion chamber, and the wall of the second cavity extends towards the direction of the cylinder sleeve.
7. The internal combustion engine of claim 6, wherein the wall of the second cavity is connected to the flow guide, and the connection of the wall of the second cavity to the flow guide is an arc surface.
8. An internal combustion engine according to any one of claims 1 to 7, wherein the surface of the flow guide projection within the combustion chamber is a curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210132785.2A CN114183235B (en) | 2022-02-14 | 2022-02-14 | Internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210132785.2A CN114183235B (en) | 2022-02-14 | 2022-02-14 | Internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114183235A CN114183235A (en) | 2022-03-15 |
| CN114183235B true CN114183235B (en) | 2022-04-19 |
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ID=80607017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210132785.2A Active CN114183235B (en) | 2022-02-14 | 2022-02-14 | Internal combustion engine |
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| Country | Link |
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| CN (1) | CN114183235B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997002417A1 (en) * | 1995-07-06 | 1997-01-23 | Fanja Ltd. | Arrangement in a cylinder head |
| CN1554861A (en) * | 2003-12-23 | 2004-12-15 | 大连理工大学 | Burning chamber of IC engine |
| CN1831307A (en) * | 2006-02-06 | 2006-09-13 | 王雪松 | Piston IC engine with combustion chamber combustable mixing gas flow collection ring |
| CN103835803A (en) * | 2014-02-24 | 2014-06-04 | 大连理工大学 | Collision shunt combustion chamber of diesel engine |
| CN205089471U (en) * | 2015-11-13 | 2016-03-16 | 重庆康明斯发动机有限公司 | Diesel engine |
| CN105736170A (en) * | 2016-03-28 | 2016-07-06 | 奇瑞汽车股份有限公司 | Aviation diesel engine piston combustion chamber and combustion system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014220343A1 (en) * | 2014-10-08 | 2016-04-14 | Ford Global Technologies, Llc | Cylinder head for a diesel engine with direct injection |
-
2022
- 2022-02-14 CN CN202210132785.2A patent/CN114183235B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997002417A1 (en) * | 1995-07-06 | 1997-01-23 | Fanja Ltd. | Arrangement in a cylinder head |
| CN1554861A (en) * | 2003-12-23 | 2004-12-15 | 大连理工大学 | Burning chamber of IC engine |
| CN1831307A (en) * | 2006-02-06 | 2006-09-13 | 王雪松 | Piston IC engine with combustion chamber combustable mixing gas flow collection ring |
| CN103835803A (en) * | 2014-02-24 | 2014-06-04 | 大连理工大学 | Collision shunt combustion chamber of diesel engine |
| CN205089471U (en) * | 2015-11-13 | 2016-03-16 | 重庆康明斯发动机有限公司 | Diesel engine |
| CN105736170A (en) * | 2016-03-28 | 2016-07-06 | 奇瑞汽车股份有限公司 | Aviation diesel engine piston combustion chamber and combustion system |
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| Publication number | Publication date |
|---|---|
| CN114183235A (en) | 2022-03-15 |
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