CN220979692U - Cylinder head and internal combustion engine - Google Patents
Cylinder head and internal combustion engine Download PDFInfo
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- CN220979692U CN220979692U CN202322994800.7U CN202322994800U CN220979692U CN 220979692 U CN220979692 U CN 220979692U CN 202322994800 U CN202322994800 U CN 202322994800U CN 220979692 U CN220979692 U CN 220979692U
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 238000004891 communication Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000498 cooling water Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 102000000591 Tight Junction Proteins Human genes 0.000 description 1
- 108010002321 Tight Junction Proteins Proteins 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000001578 tight junction Anatomy 0.000 description 1
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model provides a cylinder head and an internal combustion engine. The cylinder head body includes exhaust and intake sides disposed opposite each other, and an exhaust passage and a water-cooling chamber between the exhaust and intake sides. The connecting member is mounted to the cylinder head body and is located between the exhaust side and the intake side. In the first direction from the exhaust side to the intake side, the distance between the connecting member adjacent to the exhaust side and the exhaust side is La 1, and the distance between the connecting member adjacent to the exhaust side and the connecting member adjacent to the intake side is La 2,La1≥0.3*La2. The utility model enables the connecting piece adjacent to the exhaust side to have enough distance with the exhaust side, and the cooling water area with larger flow and space is arranged through the distance, thereby improving the cooling effect, reducing the exhaust temperature, reducing the thermal deformation of the cylinder cover and the exhaust pipe, reducing the risk of sealing failure of the cylinder cover and the exhaust pipe, and improving the reliability of an exhaust system of the internal combustion engine.
Description
Technical Field
The utility model relates to the technical field of internal combustion engines, in particular to a cylinder cover and an internal combustion engine.
Background
This section provides merely background information related to the present disclosure and is not necessarily prior art.
The cylinder head is an important component for use in an internal combustion engine, and is typically located in the upper portion of the engine, overlying and closing the cylinder block. The cylinder head and cylinder block together form a combustion chamber of the engine, the cylinder head providing mounting locations for valves and camshafts, and also having coolant passages and lubricant passages to maintain proper operation of the engine.
The upper part of the cylinder cover is connected with an exhaust pipe, the exhaust pipe is responsible for exhausting combustion exhaust gas of the internal combustion engine, and because the temperature of the exhaust gas in the exhaust pipe is too high, thermal deformation is formed at the joint of the exhaust pipe and the cylinder cover, the sealing failure of the joint of the cylinder cover and the exhaust pipe is easy to cause, and the reliability of an exhaust system of the internal combustion engine is further influenced.
Disclosure of utility model
The utility model aims to at least solve the problem of sealing failure at the joint of the existing cylinder cover and the exhaust pipe. The aim is achieved by the following technical scheme:
A first aspect of the present utility model proposes a cylinder head comprising: a cylinder head body including an exhaust side and an intake side disposed opposite to each other, and a plurality of exhaust passages and a plurality of water-cooling chambers between the exhaust side and the intake side; a plurality of connecting members for mounting the cylinder head body to a cylinder block and located between the exhaust side and the intake side, the water-cooling chamber being provided between the exhaust side and the connecting members adjacent to the exhaust side; in a first direction from the exhaust side to the intake side, a distance between the connecting piece adjacent to the exhaust side and the exhaust side is La 1, and a distance between the connecting piece adjacent to the exhaust side and the connecting piece adjacent to the intake side is La 2, wherein La 1 and La 2 satisfy: la 1≥0.3*La2.
According to the cylinder head provided by the utility model, la 1 is designed to be more than or equal to 0.3 x La 2, so that a connecting piece adjacent to the exhaust side can be provided with a sufficient distance from the exhaust side, a cooling water area with larger flow and space is arranged through the distance, the cooling effect is improved, the exhaust temperature is reduced, the thermal deformation of the cylinder head and an exhaust pipe is reduced, the risk of sealing failure of the cylinder head and the exhaust pipe is reduced, and the reliability of an exhaust system of an internal combustion engine is improved.
In addition, the cylinder head according to the utility model may have the following additional technical features:
in some embodiments of the utility model, the La 1 and the La 2 satisfy La 1≤0.6*La2.
In some embodiments of the utility model, the distance between the exhaust side and the intake side is La 3, and La 2 and La 3 satisfy: 1.4 la 2≤La3≤1.8*La2.
In some embodiments of the utility model, the plurality of exhaust passages includes a first exhaust passage and a second exhaust passage aligned along a second direction of the cylinder head, the second direction being perpendicular to the first direction; the first exhaust passage has a first exhaust port on the exhaust side, and the second exhaust passage has a second exhaust port on the exhaust side; wherein the first exhaust port and the second exhaust port are communicated at the exhaust side.
In some embodiments of the utility model, at least one of the water-cooled chambers is provided on both sides of the first exhaust passage in the second direction, and/or at least one of the water-cooled chambers is provided on both sides of the second exhaust passage in the second direction.
In some embodiments of the utility model, the plurality of exhaust passages includes a third exhaust passage and a fourth exhaust passage aligned along the second direction; the third exhaust passage has a third exhaust port on the exhaust side, and the fourth exhaust passage has a fourth exhaust port on the exhaust side; the third exhaust port and the fourth exhaust port have a preset interval.
In some embodiments of the utility model, at least one of the water-cooled chambers is provided between the third exhaust passage and the fourth exhaust passage.
In some embodiments of the utility model, the third exhaust passage and the fourth exhaust passage are provided in a middle portion of the cylinder head body in the second direction; along the second direction, one side of the third exhaust passage far away from the fourth exhaust passage is provided with a group of the first exhaust passage and the second exhaust passage, and along the second direction, one side of the fourth exhaust passage far away from the third exhaust passage is provided with another group of the first exhaust passage and the second exhaust passage.
In some embodiments of the utility model, at least one water-cooled chamber is provided between the third exhaust passage and one set of the first exhaust passage and the second exhaust passage adjacent thereto, and/or at least one water-cooled chamber is provided between the fourth exhaust passage and another set of the first exhaust passage and the second exhaust passage adjacent thereto.
A second aspect of the utility model proposes an internal combustion engine having a cylinder head as set forth in the above-described claim, and an exhaust pipe communicating with the cylinder head.
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 utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 schematically shows a schematic structure of a cylinder head according to an embodiment of the present utility model.
The reference numerals are as follows:
100. A cylinder head body; 110. an exhaust side; 120. an intake side; 121. a first air inlet; 122. a second air inlet; 123. a third air inlet; 124. a fourth air inlet; 130. a water-cooling chamber; 140. a first exhaust passage; 141. a first exhaust port; 150. a second exhaust passage; 151. a second exhaust port; 160. a third exhaust passage; 161. a third exhaust port; 170. a fourth exhaust passage; 171. a fourth exhaust port; 200. a connecting piece; 300. and an exhaust pipe.
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" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "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. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
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 another 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 ease 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. Accordingly, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.
The cylinder head and the blast pipe are the important structural component of engine, and the blast pipe is connected in the cylinder head upside, and the blast pipe is responsible for the discharge of internal-combustion engine combustion exhaust gas, and at the blast pipe during operation, exhaust gas temperature is higher, consequently can produce great atmospheric pressure in the junction of blast pipe and cylinder head upside for the junction produces great thermal deformation, and the deformation can lead to the junction of blast pipe and cylinder head to appear sealed inefficacy, circumstances such as fracture, influences the reliability of internal-combustion engine exhaust system.
The existing cylinder cover is generally provided with a cooling water pipe at the upper side to cool the joint of the exhaust pipe and the cylinder cover, but because the cylinder cover is connected with the cylinder of the internal combustion engine by a bolt, and the connecting pieces such as the bolt are required to be arranged around the piston rod of the cylinder, the bolt occupies most space of the cylinder cover, so that the space of a cooling cavity at the joint of the bolt and the cylinder cover and the exhaust pipe is too small to meet the cooling requirement of the joint of the exhaust pipe and the exhaust pipe, and the joint of the exhaust pipe and the cylinder cover still has the problem of sealing failure.
In view of this, the present embodiment provides a cylinder head, which aims to meet the requirement of expanding the space of the cooling chamber by increasing the distance between the connecting piece such as the bolt and the connecting part of the cylinder head and the exhaust pipe, thereby achieving a better cooling effect.
Fig. 1 schematically shows a schematic structure of a cylinder head according to an embodiment of the present utility model.
In connection with the embodiment according to the utility model shown in fig. 1, a cylinder head is proposed, which comprises a cylinder head body 100 and a plurality of connecting pieces 200. The cylinder head body 100 of the present embodiment includes, among other things, an exhaust side 110 and an intake side 120 disposed opposite to each other, and a plurality of exhaust passages and a plurality of water-cooling chambers 130 between the exhaust side 110 and the intake side 120.
It is to be appreciated that the "exhaust side 110" and "intake side 120" described above may be side walls of the cylinder head.
The plurality of connecting members 200 of the present embodiment are each mounted to the cylinder head body 100, the plurality of connecting members 200 are each located between the exhaust side 110 and the intake side 120, and the water-cooling chamber 130 needs to be provided between the exhaust side 110 and the connecting member 200 adjacent to the exhaust side 110.
Alternatively, the connecting member 200 of the present embodiment may be a connecting structure such as a bolt, and the cylinder head of the present embodiment is connected to a cylinder block (not shown in the drawings) of the internal combustion engine by the connecting member 200, and since the number of cylinder blocks is large, it is necessary to arrange a plurality of sets of connecting members 200, and each set of connecting members 200 needs to be disposed around the cylinder block to which it is connected.
In the first direction from the exhaust side 110 to the intake side 120, the distance between the connector 200 adjacent to the exhaust side 110 of the present embodiment and the exhaust side 110 is defined as La 1, the distance between the connector 200 adjacent to the exhaust side 110 of the present embodiment and the connector 200 adjacent to the intake side 120 of the present embodiment is defined as La 2, where La 1 and La 2 satisfy: la 1≥0.3*La2.
The reason for adopting the above structural design is that, in satisfying the strong correlation between La 2 and the distance between the exhaust side 110 and the intake side 120 around the cylinder block with the connector 200, when La 1 is designed to be equal to or greater than 0.3×la 2, compared with the existing structure, the larger the specific gravity occupied by the distance between the connector 200 adjacent to the exhaust side 110 and the distance occupied by the distance between the connector 200 adjacent to the intake side 120 is, the larger the space between the exhaust side 110 and the connector 200 is, the larger the space between the water-cooling chamber 130 can be provided, the cooling interval is increased, the cooling requirement on the exhaust passage can be satisfied, the cooling effect is improved, the exhaust temperature is reduced, the thermal deformation of the cylinder head and the exhaust pipe 300 is reduced or even avoided, the risk of sealing failure at the interface of the cylinder head and the exhaust pipe 300 is further reduced, and the reliability of the exhaust system of the internal combustion engine is improved.
Further, the present embodiment also designed La 1 and La 2 to satisfy La 1≤0.6*La2. The purpose of adopting this kind of design is that when satisfying La 1 size, avoid exhaust side 110 and intake side 120 too big and lead to the cylinder head too big and be difficult to install too, also can practice thrift manufacturing cost.
For example, la 1 of the present embodiment may be designed to be equal to 0.5 times La 2, while taking into account the cost, to increase the distance between the adjacent connector 200 of the exhaust side 110 and the exhaust side 110 as much as possible, so that the water-cooling chamber 130 can have a larger cooling section.
Regarding the strong correlation between La 2 mentioned in the foregoing and the distances of the exhaust side 110 and the intake side 120, the distances of the exhaust side 110 and the intake side 120 can be defined as La 3,La2 and La 3 satisfying: 1.4la 2≤La3≤1.8*La2. Specifically, la 3 may be any size between 1.4La 2 and 1.8La 2.
Referring again to fig. 1, among the plurality of exhaust passages of the present embodiment, a first exhaust passage 140 and a second exhaust passage 150 aligned in a second direction of the cylinder head, the second direction being perpendicular to the first direction, are included.
Further, the first exhaust passage 140 of the present embodiment has a first exhaust port 141 located at the exhaust side 110, and the second exhaust passage 150 of the present embodiment has a second exhaust port 151 located at the exhaust side 110. The intake side 120 is provided with a first intake port 121 and a second intake port 122, and gas enters the cylinder block through the first intake port 121 and the second intake port 122, and is discharged to the first exhaust passage 140 and the second exhaust passage 150 of the present embodiment after combustion. Wherein the first exhaust port 141 and the second exhaust port 151 communicate at the exhaust side 110, i.e., the first exhaust passage 140 and the second exhaust passage 150 share one exhaust port.
In this embodiment, fig. 1 is a cross-sectional view of a cylinder head, and therefore, communication portions between intake ports and exhaust ports are not shown in the drawing.
The reason for adopting this kind of structural design is that, because the gas vent of exhaust passage is the junction of blast pipe 300 and cylinder head body 100, need carry out sealing treatment at every junction, form the seal mouth, a plurality of seal mouths can lead to the structure complicacy of blast pipe 300, and whole length is great, and the exhaust cooling distance is short, and the exhaust temperature is high, and the thermal deformation is big, and then leads to the seal failure of tight junction easily.
In this embodiment, the first exhaust passage 140 and the second exhaust passage 150 share one exhaust port, so that the number of sealing ports between the exhaust pipe 300 and the cylinder head can be reduced, and the high risk area with thermal deformation can be reduced.
In order to ensure the cooling effect, at least one water-cooling chamber 130 may be provided on both sides of the first exhaust passage in the second direction of the present embodiment, and/or at least one water-cooling chamber 130 may be provided on both sides of the second exhaust passage in the second direction of the present embodiment.
For example, as shown in fig. 1, the present embodiment is provided with a water cooling chamber 130 on a side of the first exhaust passage 140 facing away from the second exhaust passage 150, a water cooling chamber 130 on a side of the second exhaust passage 150 facing away from the first exhaust passage 140, and a water cooling chamber 130 shared by both the first exhaust passage 140 and the second exhaust passage 150, so as to satisfy the cooling requirements of the first exhaust passage 140 and the second exhaust passage 150.
The plurality of exhaust passages of the present embodiment further includes a third exhaust passage 160 and a fourth exhaust passage 170 aligned in the second direction, in addition to the first exhaust passage 140 and the second exhaust passage 150 described above.
The third exhaust passage 160 of the present embodiment has a third exhaust port 161 located at the exhaust side 110, and the fourth exhaust passage 170 of the present embodiment has a fourth exhaust port 171 located at the exhaust side 110, the third and fourth exhaust ports 161 and 171 having a predetermined interval. The intake side 120 is provided with a third intake port 123 and a fourth intake port 124, and gas enters the cylinder block through the first intake port 121, the second intake port 122, the third intake port 123 and the fourth intake port 124, and is discharged to the first exhaust passage 140, the second exhaust passage 150, the third exhaust passage 160 and the fourth exhaust passage 170 of the present embodiment after combustion, and is discharged.
Also, in order to secure a cooling effect, at least one water-cooling chamber 130 is provided between the third exhaust passage 160 and the fourth exhaust passage 170 of the present embodiment.
Further, in the second direction, the third exhaust passage 160 and the fourth exhaust passage 170 are provided in the middle of the cylinder head body 100, and the third exhaust passage 160 and the fourth exhaust passage 170 of the present embodiment are symmetrically provided with respect to the middle position in the second direction of the cylinder head body 100.
The third and fourth exhaust passages 160 and 170 are designed to be symmetrical structures, so that it is possible to reduce the lengths of the third and fourth exhaust passages 160 and 170 in the second direction, because the present embodiment has enhanced the cooling effect by increasing the space of the water-cooling chamber 130 first, and when the third and fourth exhaust passages 160 and 170 are designed to be centrally symmetrical structures, it is possible to ensure that the cooling region of the water-cooling chamber 130 therebetween covers the region therebetween without providing excessively long third and fourth exhaust passages 160 and 170 in the second direction to enter the cooling region of the water-cooling chamber 130.
Further, it is also possible to locate one set of the first and second exhaust passages 140 and 150 of the present embodiment at one side of the third and fourth exhaust passages 160 and 170, and the other set of the first and second exhaust passages 140 and 150 at the other side of the third and fourth exhaust passages 160 and 170, and the two sets of the first and second exhaust passages 140 and 150 are symmetrically disposed with respect to the third and fourth exhaust passages 160 and 170.
By adopting the structural design, the same way as the symmetrical arrangement of the third exhaust passage 160 and the fourth exhaust passage 170 can make all the exhaust passages of the present embodiment be symmetrically arranged, so that the overall length of the exhaust pipe 300 can be reduced, and the range of thermal deformation at the junction of the exhaust pipe 300 and the exhaust passage can be reduced. In addition, the structure can further enable a plurality of cylinder blocks connected with the cylinder cover to be distributed more regularly, exhaust is more uniform, and exhaust consistency is improved.
In some embodiments of the present utility model, at least one water-cooled chamber 130 is provided between the third exhaust passage 160 and the adjacent set of first and second exhaust passages 140, 150, and/or at least one water-cooled chamber 130 is provided between the fourth exhaust passage 170 and the adjacent set of first and second exhaust passages 140, 150.
The present embodiment also proposes an internal combustion engine having the cylinder head of the above-described technical scheme, and an exhaust pipe 300 communicating with the cylinder head.
Since the first exhaust passage 140 and the second exhaust passage 150 share one exhaust port, the exhaust pipe 300 of the present embodiment may have only four pipes, wherein two pipes are connected to two groups of the first exhaust passage 140 and the second exhaust passage 150 in a one-to-one correspondence manner, and the other two pipes are connected to the third exhaust passage 160 and the fourth exhaust passage 170, respectively.
Of course, the third exhaust passage 160 and the fourth exhaust passage 170 may also share one exhaust port, and in this case, the exhaust pipe 300 of the present embodiment may only have three pipes, where two pipes are connected to the exhaust ports shared by the two groups of the first exhaust passage 140 and the second exhaust passage 150 in a one-to-one correspondence manner, and the other pipe is connected to the exhaust port shared by the third exhaust passage 160 and the fourth exhaust passage 170.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. A cylinder head, comprising:
A cylinder head body including an exhaust side and an intake side disposed opposite to each other, and a plurality of exhaust passages and a plurality of water-cooling chambers between the exhaust side and the intake side;
A plurality of connecting members for mounting the cylinder head body to a cylinder block and located between the exhaust side and the intake side, the water-cooling chamber being provided between the exhaust side and the connecting members adjacent to the exhaust side;
In a first direction from the exhaust side to the intake side, a distance between the connecting piece adjacent to the exhaust side and the exhaust side is La 1, and a distance between the connecting piece adjacent to the exhaust side and the connecting piece adjacent to the intake side is La 2, wherein La 1 and La 2 satisfy: la 1≥0.3*La2.
2. The cylinder head of claim 1, wherein the La 1 and the La 2 further satisfy La 1≤0.6*La2.
3. The cylinder head of claim 1, wherein the distance between the exhaust side and the intake side is La 3, the La 2 and La 3 further satisfying: 1.4 la 2≤La3≤1.8*La2.
4. The cylinder head of claim 1, wherein the plurality of exhaust passages includes a first exhaust passage and a second exhaust passage aligned along a second direction of the cylinder head, the second direction being perpendicular to the first direction;
the first exhaust passage has a first exhaust port on the exhaust side, and the second exhaust passage has a second exhaust port on the exhaust side;
wherein the first exhaust port and the second exhaust port are communicated at the exhaust side.
5. The cylinder head according to claim 4, characterized in that at least one of the water-cooled chambers is provided on both sides of the first exhaust passage in the second direction, and/or at least one of the water-cooled chambers is provided on both sides of the second exhaust passage in the second direction.
6. The cylinder head as set forth in claim 4 wherein a plurality of said exhaust passages further include third and fourth exhaust passages aligned in said second direction;
The third exhaust passage has a third exhaust port on the exhaust side, and the fourth exhaust passage has a fourth exhaust port on the exhaust side;
The third exhaust port and the fourth exhaust port have a preset interval.
7. The cylinder head of claim 6, wherein at least one of the water-cooled chambers is disposed between the third exhaust passage and the fourth exhaust passage.
8. The cylinder head according to claim 6, wherein in the second direction, the third exhaust passage and the fourth exhaust passage are provided in a middle portion of the cylinder head body;
Along the second direction, one side of the third exhaust passage far away from the fourth exhaust passage is provided with a group of the first exhaust passage and the second exhaust passage, and along the second direction, one side of the fourth exhaust passage far away from the third exhaust passage is provided with another group of the first exhaust passage and the second exhaust passage.
9. The cylinder head according to claim 8, characterized in that at least one water-cooled chamber is provided between the third exhaust passage and one of the first exhaust passage and the second exhaust passage adjacent thereto, and/or at least one water-cooled chamber is provided between the fourth exhaust passage and the other of the first exhaust passage and the second exhaust passage adjacent thereto.
10. An internal combustion engine, comprising:
the cylinder head according to any one of claims 1 to 9; and an exhaust pipe in communication with the cylinder head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322994800.7U CN220979692U (en) | 2023-11-06 | 2023-11-06 | Cylinder head and internal combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322994800.7U CN220979692U (en) | 2023-11-06 | 2023-11-06 | Cylinder head and internal combustion engine |
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| Publication Number | Publication Date |
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| CN220979692U true CN220979692U (en) | 2024-05-17 |
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| CN202322994800.7U Active CN220979692U (en) | 2023-11-06 | 2023-11-06 | Cylinder head and internal combustion engine |
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| CN (1) | CN220979692U (en) |
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- 2023-11-06 CN CN202322994800.7U patent/CN220979692U/en active Active
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