CN112211742A - Cylinder head and engine with same - Google Patents
Cylinder head and engine with same Download PDFInfo
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- CN112211742A CN112211742A CN202010948681.XA CN202010948681A CN112211742A CN 112211742 A CN112211742 A CN 112211742A CN 202010948681 A CN202010948681 A CN 202010948681A CN 112211742 A CN112211742 A CN 112211742A
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- Prior art keywords
- cooling water
- prechamber
- arc surface
- water cavity
- chamber body
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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
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream
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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
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
- F02B19/1004—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder details of combustion chamber, e.g. mounting arrangements
- F02B19/1009—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder details of combustion chamber, e.g. mounting arrangements heating, cooling
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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
- F02F1/242—Arrangement of spark plugs or injectors
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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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention belongs to the technical field of engines, and particularly relates to a cylinder cover and an engine with the same. The invention provides a cylinder cover, which comprises a cylinder cover body, wherein an upper cooling water cavity and a lower cooling water cavity communicated with the upper cooling water cavity are formed on the cylinder cover body; the precombustion chamber body, the precombustion chamber body sets up on the cylinder cap body, and the precombustion chamber body is located the intercommunication department of last cooling water cavity and lower cooling water cavity, goes up the cooling water cavity and all arranges around the precombustion chamber body with lower cooling water cavity, and the one end that goes up the cooling water cavity and be close to intercommunication department is equipped with the guide cambered surface, and the guide cambered surface is used for leading cooling water to the outer wall of the precombustion chamber body. According to the cylinder cover guide arc surface disclosed by the invention, the cooling water is guided to the outer wall of the precombustion chamber body by the cylinder cover guide arc surface, so that the precombustion chamber body is cooled by the cooling water, the cooling water is ensured to be fully contacted with the outer wall of the precombustion chamber body, and meanwhile, the heat of the precombustion chamber body is rapidly taken away, so that the cooling effect of the precombustion chamber body is improved.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to a cylinder cover and an engine with the same.
Background
At present, the combustion efficiency of the large-bore natural gas is improved by mostly adopting a pre-combustion chamber body ignition mode. The working principle is that the fuel gas is introduced into the precombustion chamber body and is ignited by the spark plug, the ignited fuel gas is in a high-temperature and high-pressure state in the narrow precombustion chamber body, and the high-temperature and high-pressure fuel gas is sprayed into a main combustion chamber (consisting of a cylinder cover and a piston) through a small hole at the tail end of the precombustion chamber body to ignite the fuel gas in the main combustion chamber. The ignition mode can effectively improve the combustion efficiency speed and effectively reduce the gas consumption.
Because the precombustion chamber body directly contacts high-temperature and high-pressure fuel gas, the cooling and sealing of the precombustion chamber body become key technical problems. In the prior art, the pre-combustion chamber body is difficult to be effectively cooled and is always in a high-temperature state, when fuel gas is sprayed into the pre-combustion chamber body, the fuel gas can be directly ignited, the ignition time of the fuel gas is difficult to control, and therefore engine knock or fire is caused. Meanwhile, the pre-combustion chamber which is always in a high-temperature state can also cause the sealing gasket of the cylinder cover to lose efficacy, and then cooling liquid flows into the main combustion chamber to cause serious accidents such as engine cylinder reversing.
Disclosure of Invention
The object of the invention is to at least solve the problem of difficult effective cooling of the prechamber body. The purpose is realized by the following technical scheme:
a first aspect of the present invention provides a cylinder head including:
the cylinder cover comprises a cylinder cover body, wherein an upper cooling water cavity and a lower cooling water cavity communicated with the upper cooling water cavity are formed in the cylinder cover body;
the cylinder cover comprises a cylinder cover body, a pre-combustion chamber body is arranged on the cylinder cover body, the pre-combustion chamber body is located at a communication position of an upper cooling water cavity and a lower cooling water cavity, the upper cooling water cavity and the lower cooling water cavity are all surrounded by the pre-combustion chamber body, a guide arc surface is arranged at one end, close to the communication position, of the upper cooling water cavity, and the guide arc surface is used for guiding cooling water to the outer wall of the pre-combustion chamber body.
According to the cylinder cover provided by the embodiment of the invention, the position of the upper cooling water cavity, which is close to the communication part of the upper cooling water cavity and the lower cooling water cavity (namely, close to the pre-combustion chamber body), is provided with the guide arc surface, the guide arc surface guides the cooling water in the upper cooling water cavity to the outer wall of the pre-combustion chamber body so as to enable the cooling water to cool the pre-combustion chamber body, and the cooling water flows into the lower cooling water cavity from the outer wall. The guide cambered surface guides the cooling water to the outer wall of the precombustion chamber body, so that the cooling water impacts the outer wall of the precombustion chamber body, the cooling water is guaranteed to be in full contact with the outer wall of the precombustion chamber body, meanwhile, the heat of the precombustion chamber body is taken away quickly, and the cooling effect of the precombustion chamber body is improved.
In addition, the cylinder head according to the embodiment of the invention may further have the following technical features:
in some embodiments of the invention, the guiding arc is arranged around the prechamber body, the guiding arc being parabolic from top to bottom.
In some embodiments of the present invention, a first included angle between the guide arc surface and the lower end surface of the cylinder head body ranges from 25 degrees to 55 degrees.
In some embodiments of the present invention, the prechamber body includes a prechamber upper portion for connecting a fuel injector liner, and a prechamber lower portion connected to the prechamber upper portion, the prechamber lower portion being for connecting the cylinder head body, the guide arc surface being provided around the prechamber upper portion, and a wall surface of a concave shape in a radial direction of the prechamber body being formed at a position of the prechamber upper portion corresponding to the guide arc surface.
In some embodiments of the invention, the upper part of the prechamber is further provided with a reinforcement, which is arranged outside the wall surface.
In some embodiments of the invention, a gap is formed between the reinforcing structure and the wall surface.
In some embodiments of the present invention, an annular sealing surface is formed at a connection between the prechamber upper portion and the prechamber lower portion, the annular sealing surface is fitted to a prechamber body mounting surface of the lower cooling water chamber, and a distance from the prechamber body mounting surface to a lower end surface of the cylinder head body is equal to a distance from a bottom surface of the lower cooling water chamber around the prechamber body mounting surface to the lower end surface of the cylinder head body.
In some embodiments of the present invention, the wall surface includes a first concave arc surface and a second concave arc surface, and a second included angle between a straight line where a center of the first concave arc surface and a center of the second concave arc surface are located and the annular sealing surface ranges from 90 degrees to 130 degrees.
In some embodiments of the invention, the wall surface includes a first concave arc surface and a second concave arc surface, a center of the first concave arc surface is located above a center of the second concave arc surface, and a distance between the first concave arc surface and an axis of the prechamber body is greater than a distance between the second concave arc surface and the axis.
A second aspect of the invention proposes an engine comprising a cylinder head according to any one of the embodiments described above.
According to the engine provided by the embodiment of the invention, the upper cooling water cavity is provided with the guide arc surface at the position close to the communication part of the upper cooling water cavity and the lower cooling water cavity (namely close to the pre-combustion chamber body), the guide arc surface guides the cooling water in the upper cooling water cavity to the outer wall of the pre-combustion chamber body so as to cool the pre-combustion chamber body, the cooling water flows into the lower cooling water cavity from the outer wall, and the lower cooling water cavity is arranged around the pre-combustion chamber body, so that the pre-combustion chamber body is cooled in the process that the cooling water flows into the lower cooling water cavity from the outer wall, and a primary cooling process of the pre-combustion chamber body is completed. The guide cambered surface guides the cooling water to the outer wall of the precombustion chamber body, so that the cooling water impacts the outer wall of the precombustion chamber body, the cooling water is guaranteed to be in full contact with the outer wall of the precombustion chamber body, meanwhile, the heat of the precombustion chamber body is taken away quickly, and the cooling effect of the precombustion chamber body is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
FIG. 1 is a schematic cross-sectional structural view of a cylinder head according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the prechamber body of FIG. 1;
FIG. 3 is a schematic cross-sectional view of section A-A of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the prechamber body of FIG. 2;
FIG. 5 is a partial cross-sectional schematic view of the cylinder head of FIG. 1.
The reference symbols in the drawings denote the following:
100: a cylinder head;
10: cylinder cap body, 11: upper cooling water chamber, 111: guide arc surface, 12: lower cooling water chamber, 121: prechamber body mounting surface, 13: a lower end face;
20: precombustion chamber body, 21: prechamber upper part, 211: ignition region, 212: wall surface, 2121: first concave arc surface, 2122: second concave arc surface 213: reinforcing structure, 22: precombustor lower portion, 221: ejection area, 23: an annular sealing surface;
30: a fuel injector liner;
α: first angle, ω: second angle, d 1: first diameter, d 2: second diameter, O1: first center, O2: a second circle center, D: outer diameter of the precombustor body.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from a second region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, an embodiment of a first aspect of the present invention proposes a cylinder head 100, the cylinder head 100 including: cylinder cap body 10 and precombustion chamber body 20, be formed with cooling water cavity 11 and lower cooling water cavity 12 with last cooling water cavity 11 intercommunication on the cylinder cap body 10, precombustion chamber body 20 sets up on cylinder cap body 10, precombustion chamber body 20 is located the department of intercommunication of last cooling water cavity 11 and lower cooling water cavity 12, it all arranges around precombustion chamber body 20 with lower cooling water cavity 12 to go up cooling water cavity 11, the one end that goes up cooling water cavity 11 and be close to the department of intercommunication is equipped with guide cambered surface 111, guide cambered surface 111 is used for leading cooling water to the outer wall of precombustion chamber body 20.
According to the cylinder head 100 of the embodiment of the present invention, the guiding arc surface 111 is disposed at a position of the upper cooling water cavity 11 near a communication position of the upper cooling water cavity 11 and the lower cooling water cavity 12 (i.e., near the prechamber body 20), the guiding arc surface 111 guides the cooling water in the upper cooling water cavity 11 to the outer wall of the prechamber body 20, so that the cooling water cools the prechamber body 20, and the cooling water flows into the lower cooling water cavity 12 from the outer wall (the flow of the cooling water is reversed as shown by the arrow in fig. 5), and since the lower cooling water cavity 12 is disposed around the prechamber body 20, the prechamber body 20 is also cooled while the cooling water flows into the lower cooling water cavity 12 from the outer wall 211, thereby completing the cooling process of the prechamber body 20. The guide cambered surface guides the cooling water to the outer wall of the precombustion chamber body, so that the cooling water impacts the outer wall of the precombustion chamber body, the cooling water is guaranteed to be in full contact with the outer wall of the precombustion chamber body, meanwhile, the heat of the precombustion chamber body is taken away quickly, and the cooling effect of the precombustion chamber body is improved.
In some embodiments of the present invention, guide arcs 111 are arranged around prechamber body 20 to ensure that prechamber body 20 is more uniformly impinged by cooling water, thereby providing a more uniform cooling effect on prechamber body 20. Guide arc surface 111 is parabolic from top to bottom, and when cooling water gathers at the outlet of guide arc surface 11 (i.e., at the outlet of upper cooling water chamber 11), a large water pressure is formed, and the large water pressure makes cooling water impact the outer wall of prechamber body 20, so that heat of prechamber body 20 is quickly taken away, and the contact area between the cooling water and the outer wall is increased, thereby increasing the cooling size of prechamber body 20. Specifically, a first included angle α is formed between the guiding arc surface 111 and the lower end surface 13 of the cylinder head body 10, and when the first included angle α is 25 degrees to 55 degrees, the contact area between the cooling water and the outer wall can be maximized, so as to ensure that the prechamber body 20 obtains the optimal cooling effect.
In some embodiments of the present invention, as shown in fig. 2 to 4, the prechamber body 20 includes a prechamber upper portion 21 for connecting the injector liner 30 and a prechamber lower portion 22 connected to the prechamber upper portion 21, the prechamber lower portion 22 is used for connecting the cylinder head body 10, an inner cavity of the prechamber upper portion 21 is an ignition region 211, an inner cavity of the prechamber lower portion 22 is an injection region 221, the ignition region 211 and the injection region 221 together form a prechamber, the guide arc surface 111 is disposed around the prechamber upper portion 21, and a wall surface 212 that is concave in a radial direction of the prechamber upper portion 21 is formed at a position of the prechamber upper portion 21 corresponding to the guide arc. Wall surface 212 of prechamber upper portion 21 is designed to be concave inward, so that the wall thickness of prechamber upper portion 21 is reduced, the cooling effect of prechamber body 20 is improved, and in addition, concave inward wall surface 21 has a certain drainage function on cooling water, so that the cooling water is guided to lower cooling water cavity 12 from wall surface 212, the flowing speed of the cooling water is accelerated, and the cooling effect of prechamber body 20 can also be improved.
In some embodiments of the present invention, a plurality of reinforcing structures 213 are further disposed on the prechamber upper portion 21, and two ends of each reinforcing structure 213 are disposed outside the wall surface 212 at positions corresponding to two ends of the wall surface 212. Reinforcing structure 213 is used to ensure the rigidity of prechamber body 20, and avoid the deformation of prechamber body 20 and further serious accidents caused by insufficient rigidity of prechamber body 20 due to too thin wall thickness of upper prechamber portion 21. Further, a gap is formed between the reinforcing structure 213 and the wall surface 212 to increase the contact area of the cooling water with the wall surface 212 to improve the cooling effect, and to ensure the uniform wall thickness of the prechamber upper portion 21 to ensure the uniform cooling of the prechamber body 20 by the cooling water. When a gap is formed between the reinforcing structure 213 and the wall surface 212, the number of reinforcing structures 213 can be increased to improve the rigidity of the prechamber body 20. In addition, the reinforcing structure 213 may be provided on the wall surface 212 (that is, there is no gap between the reinforcing structure 213 and the wall surface 212), and in this case, the effect of improving the rigidity of the prechamber body 20 can be achieved by reducing the number of the reinforcing structures 213 as compared with the case where there is a gap as described above, and although this arrangement reduces the contact area between the cooling water and the wall surface 212, the reduction in the number of the reinforcing structures 213 can reduce the resistance of the reinforcing structures 213 to the flow of the cooling water, and can also improve the flow speed of the cooling water, thereby improving the cooling effect of the prechamber body 20. Specifically, the reinforcing structures 213 are reinforcing bars, the number of which ranges from 2 to 20.
In some embodiments of the present invention, an annular sealing surface 23 is formed at the connection between prechamber upper portion 21 and prechamber lower portion 22, annular sealing surface 23 is fitted to prechamber body mounting surface 121 of lower cooling water chamber 12, and the distance from prechamber body mounting surface 121 to lower end surface 13 of head body 10 is equal to the distance from bottom surface 121 of lower cooling water chamber 12 around the mounting surface of prechamber body 20 to lower end surface 13 of head body 10, that is, the height of prechamber body mounting surface 121 is equal to the height of bottom surface 121 of lower cooling water chamber 12 around prechamber body mounting surface. The improvement in the original boss-type prechamber body mounting surface over the prior art reduces the distance between prechamber body mounting surface 121 and lower end surface 13, thereby improving the cooling effect of prechamber body 20 (prechamber lower portion 22).
In some embodiments of the present disclosure, wall 212 includes a first concave arc surface 2121 and a second concave arc surface 2122, a first center O1 of first concave arc surface 2121 is located above a second center O2 of second concave arc surface 2122, and a distance between first concave arc surface 2121 and an axis of prechamber body 20 is greater than a distance between second concave arc surface 2122 and the axis. Such that second concave arc surface 2122 is located at the lower right of first concave arc surface 2121 to further direct the cooling water.
In some embodiments of the present invention, in the case that the diameters of the first concave arc surface 2121 and the second concave arc surface 2122 are the same, the centers of the two arc surfaces may be arranged on a straight line parallel to the axis of the prechamber body 20, and in this case, the first concave arc surface 2121 and the second concave arc surface 2122 may also function as a flow guide. A first center O1 of the first concave arc surface 2121 and a second center O2 of the second concave arc surface 2122
The second angle co between the straight line and the annular sealing surface 23 is in the range of 90 to 130 degrees. When the height of prechamber upper part 21 is large, wall 212 formed by two or more curved surfaces is arranged on prechamber upper part 21 to ensure the drainage of cooling water by wall 212 and the cooling effect of cooling water on prechamber body 20. When the height of prechamber upper part 21 is small, a wall 212 with a curved surface can be provided, which allows prechamber body 20 to be cooled efficiently in a limited space. The first diameter d1 of the first concave curved surface 2121 and the second diameter d2 of the second lake surface 2122 may be determined according to the size of the prechamber body 20, the size of the upper cooling water chamber 11, and the size of the lower cooling water chamber 12.
In some embodiments of the present invention, as shown in fig. 4, a distance H1 between the first center O1 of the first concave arc surface 2121 and the annular sealing surface 23 is set according to an outer diameter D of the prechamber body 20 in a relationship of H1 ═ 0.35 to 0.55 ×, and a distance H2 between the second center O2 of the second concave arc surface 2122 and the annular sealing surface 23 is set according to an outer diameter D of the prechamber body 20 in a relationship of H2 ═ 0.15 to 0.3 ×.d.
In some embodiments of the present invention, as shown in fig. 5, a distance H between the first center O1 of the first concave arc surface 2121 and the end of the guide arc surface 111 connected to the lower cooling water chamber 12 is greater than 0, and a height of the first center O1 of the first concave arc surface 2121 in the axial direction of the prechamber body 20 is greater than a height of the end of the guide arc surface 111 connected to the lower cooling water chamber 12. That is, the end of the throat of the guiding arc surface 111 is located below the first center O1 of the first concave arc surface 2121 and closer to the lower end surface 13 of the cylinder head body, so that the cooling water flowing through the guiding arc surface 111 can be thrown onto the first concave arc surface 2121, and the cooling effect of the prechamber body 20 is ensured.
An embodiment of a second aspect of the invention proposes an engine comprising a cylinder head 100 according to any of the embodiments described above.
According to the engine of the embodiment of the invention, the position of the upper cooling water cavity 11 close to the communication position of the upper cooling water cavity 11 and the lower cooling water cavity 12 (i.e. close to the prechamber body 20) is provided with the guide arc surface 111, the guide arc surface 111 guides the cooling water in the upper cooling water cavity 11 to the outer wall of the prechamber body 20, so that the cooling water cools the prechamber body 20 and flows into the lower cooling water cavity 12 from the outer wall, and as the lower cooling water cavity 12 is arranged around the prechamber body 20, the prechamber body 20 is also cooled in the process that the cooling water flows from the outer wall 211 to the lower cooling water cavity 12, thereby completing the cooling process of the prechamber body 20. The guide cambered surface guides the cooling water to the outer wall of the precombustion chamber body, so that the cooling water impacts the outer wall of the precombustion chamber body, the cooling water is guaranteed to be in full contact with the outer wall of the precombustion chamber body, meanwhile, the heat of the precombustion chamber body is taken away quickly, and the cooling effect of the precombustion chamber body is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A cylinder head, characterized by comprising:
the cylinder cover comprises a cylinder cover body, wherein an upper cooling water cavity and a lower cooling water cavity communicated with the upper cooling water cavity are formed in the cylinder cover body;
the cylinder cover comprises a cylinder cover body, a pre-combustion chamber body is arranged on the cylinder cover body, the pre-combustion chamber body is located at a communication position of an upper cooling water cavity and a lower cooling water cavity, the upper cooling water cavity and the lower cooling water cavity are all surrounded by the pre-combustion chamber body, a guide arc surface is arranged at one end, close to the communication position, of the upper cooling water cavity, and the guide arc surface is used for guiding cooling water to the outer wall of the pre-combustion chamber body.
2. The cylinder head of claim 1, wherein the guide arc is disposed around the prechamber body, the guide arc having a parabolic cross-section from top to bottom.
3. The cylinder head of claim 2, wherein the first included angle between the guide arc surface and the lower end surface of the head body is in a range of 25 degrees to 55 degrees.
4. The cylinder head according to claim 2, wherein the pre-chamber body includes a pre-chamber upper portion for connecting a fuel injector liner and a pre-chamber lower portion connected to the pre-chamber upper portion, the pre-chamber lower portion being for connecting the cylinder head body, the guide arc surface being provided around the pre-chamber upper portion, and a wall surface of a concave shape in a radial direction of the pre-chamber body being formed at a position of the pre-chamber upper portion corresponding to the guide arc surface.
5. A cylinder head according to claim 4, characterized in that the prechamber upper part is further provided with a reinforcement, which is arranged outside the wall surface.
6. The cylinder head of claim 5, wherein a gap is formed between the reinforcement structure and the wall surface.
7. The cylinder head according to claim 4, wherein an annular sealing surface is formed at a junction of the prechamber upper portion and the prechamber lower portion, the annular sealing surface being fitted to a prechamber body mounting surface of the lower cooling water chamber, and a distance from the prechamber body mounting surface to a lower end surface of the head body is equal to a distance from a bottom surface of the lower cooling water chamber around the prechamber body mounting surface to the lower end surface of the head body.
8. The cylinder head of claim 7, wherein the wall surface includes a first concave arc surface and a second concave arc surface, and a second included angle between a straight line where a center of the first concave arc surface and a center of the second concave arc surface are located and the annular seal surface is in a range of 90 degrees to 130 degrees.
9. The cylinder head of claim 4, wherein the wall surface includes a first concave arc surface and a second concave arc surface, a center of the first concave arc surface being located above a center of the second concave arc surface, a distance between the first concave arc surface and an axis of the pre-chamber body being greater than a distance between the second concave arc surface and the axis.
10. An engine, characterized in that the engine comprises a cylinder head according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010948681.XA CN112211742B (en) | 2020-09-10 | 2020-09-10 | Cylinder head and engine with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010948681.XA CN112211742B (en) | 2020-09-10 | 2020-09-10 | Cylinder head and engine with same |
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| CN112211742A true CN112211742A (en) | 2021-01-12 |
| CN112211742B CN112211742B (en) | 2022-08-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022251889A1 (en) * | 2021-06-02 | 2022-12-08 | Innio Jenbacher Gmbh & Co Og | Pre-chamber and internal combustion engine |
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| EP1091104A1 (en) * | 1999-10-08 | 2001-04-11 | Caterpillar Inc. | Cooled pre-combustion chamber assembly |
| CN1453462A (en) * | 2002-04-23 | 2003-11-05 | 曼·B及W柴油机公开股份有限公司 | Self-igniting, mixed compressing internal combustion engine and its operating method |
| CN102762835A (en) * | 2009-12-22 | 2012-10-31 | 康明斯有限公司 | Pre-combustion device for an internal combustion engine |
| EP3051092A1 (en) * | 2015-01-29 | 2016-08-03 | Caterpillar Energy Solutions GmbH | Cooling of pre-chamber in internal combustion engine |
| US20160252007A1 (en) * | 2016-05-09 | 2016-09-01 | Caterpillar Inc. | Pre-chamber assembly for engine |
| CN211314392U (en) * | 2019-09-30 | 2020-08-21 | 潍柴动力股份有限公司 | Cylinder cover assembly and gas engine with same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022251889A1 (en) * | 2021-06-02 | 2022-12-08 | Innio Jenbacher Gmbh & Co Og | Pre-chamber and internal combustion engine |
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| CN112211742B (en) | 2022-08-23 |
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