A cooling structure for a cylinder head cover assembly

Abstract

This utility model belongs to the field of internal combustion engine technology and provides a cooling structure for a cylinder head assembly. The structure includes an air guide shroud that covers the cylinder head assembly, and a cooling channel for cooling airflow is provided between the air guide shroud and the cylinder head assembly. This cooling channel is connected to the engine's main cooling channel, allowing cooling airflow from the main cooling channel to enter and cool the cylinder head assembly. The cooling structure provided by this utility model, by providing the air guide shroud, forms a cooling channel between the cylinder head assembly and the air guide shroud, enabling cooling airflow from the engine's main cooling channel to enter and cool the cylinder head assembly. Therefore, the cooling efficiency for the cylinder head assembly is high.

Description

Technical Field

[0001] This utility model relates to the field of internal combustion engine technology, and specifically to a cooling structure for cylinder head assembly. Background Technology

[0002] As the core power source of various mechanical equipment, the engine generates a large amount of heat during operation. Some of this heat is transferred to the cylinder head assembly through heat conduction, causing a rapid increase in the cylinder head assembly temperature. Excessive cylinder head assembly temperature can lead to a series of adverse consequences, such as decreased engine charging efficiency, abnormal combustion, thermal deformation or even damage to components, and reduced separation effectiveness of the oil-gas separator located on the cylinder head assembly. These issues severely impact engine performance, reliability, and service life. Therefore, effective cooling of the engine cylinder head assembly is crucial.

[0003] However, in existing technologies, the cylinder head assembly of an engine is typically exposed, dissipating heat through heat exchange between the air and the surface of the cylinder head assembly. However, this cooling method is relatively ineffective for heat dissipation from the cylinder head assembly. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a cooling structure for cylinder head assembly to improve the heat dissipation effect of cylinder head assembly.

[0005] To achieve the above objectives, this utility model provides a cooling structure for a cylinder head assembly. The cylinder head assembly includes a cylinder head body, an intake valve, an exhaust valve, and a spark plug disposed on the cylinder head body, and a cylinder head cover fastened to the cylinder head body and used to seal the intake and exhaust valves. It includes an air guide shroud covering the cylinder head assembly, and a cooling channel for cooling airflow is provided between the air guide shroud and the cylinder head assembly. The cooling channel is connected to the main cooling channel of the engine, so that the cooling airflow in the main cooling channel can enter the cooling channel of the cylinder head assembly to cool the cylinder head assembly.

[0006] Furthermore, the air guide cover includes a first cover and a second cover, wherein the first cover is disposed on the cylinder head cover, and the second cover is disposed on one side of the cylinder head body.

[0007] Furthermore, an air guide plate is provided on the inner side of the second cover. The air guide plate is located on the side of the spark plug away from the air inlet of the main cooling channel. The air guide plate is used to guide the cooling airflow from the main cooling channel to the first cover to cool the cylinder head cover.

[0008] Furthermore, a gap is left between the air guide plate and the cylinder head body so that part of the cooling airflow delivered from the main cooling channel can pass through the air guide plate to cool the cylinder head body, while the other part is guided by the air guide plate to the cylinder head cover to cool the cylinder head cover.

[0009] Furthermore, the first cover and the second cover are integrally formed.

[0010] Furthermore, the distance between the inner wall of the air guide shroud and the outer wall of the cylinder head cover assembly is L, wherein 0.25cm≤L≤1.5cm.

[0011] Furthermore, the air guide shroud is provided with a clearance hole, which corresponds to the spark plug, so that the spark plug can pass through the clearance hole and be exposed.

[0012] Furthermore, a sealing element adapted to the clearance hole is provided at the clearance hole, and the sealing element is sleeved on the spark plug.

[0013] The beneficial effects of this utility model are:

[0014] The cooling structure for cylinder head assembly provided by this utility model forms a cylinder head head assembly cooling channel between the cylinder head head assembly and the air guide shroud by setting an air guide shroud. This allows the cooling airflow in the main cooling channel of the engine to enter the cylinder head head assembly cooling channel to cool the cylinder head head assembly, thereby improving the cooling efficiency of the cylinder head head assembly. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 A perspective view of a cooling structure for a cylinder head assembly provided in an embodiment of the present invention;

[0017] Figure 2 for Figure 1 An enlarged view of part A shown;

[0018] Figure 3 for Figure 1 An exploded view of the cooling structure for the cylinder head assembly;

[0019] Figure 4 for Figure 3 An enlarged view of section B is shown below;

[0020] Figure 5 for Figure 1 A perspective view of the air shroud for the cooling structure of the cylinder head assembly.

[0021] Figure label:

[0022] 110. Cylinder head body; 120. Cylinder head cover; 130. Spark plug; 200. Air guide shroud; 210. First cover; 220. Second cover; 230. Air guide plate; 240. Clearance hole; 300. Sealing element. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] like Figures 1-5 As shown, this utility model provides a cooling structure for a cylinder head assembly, wherein the cylinder head assembly includes a cylinder head body 110, an intake valve, an exhaust valve and a spark plug 130 disposed on the cylinder head body 110, and a cylinder head cover 120 fastened to the cylinder head body 110 and used to seal the intake valve and the exhaust valve.

[0030] The cooling structure for the cylinder head assembly includes a shroud 200, which covers the cylinder head assembly. A cooling channel for the cylinder head assembly is provided between the shroud 200 and the cylinder head assembly to allow cooling airflow. The cooling channel is connected to the engine's main cooling channel so that the cooling airflow in the main cooling channel enters the cooling channel to cool the cylinder head assembly.

[0031] In this embodiment, the cooling airflow in the main cooling passage of the engine is introduced into the cooling passage of the cylinder head assembly through the air guide shroud 200, so as to quickly remove the heat on the cylinder head assembly, thereby achieving the purpose of rapidly reducing the temperature of the cylinder head assembly and improving the cooling effect of the cylinder head assembly.

[0032] In other embodiments of the cooling structure for the cylinder head assembly provided by this utility model, an oil-gas separator is provided on the cylinder head assembly. The oil-gas separator includes an oil-gas separation chamber formed by the cylinder head 120 and the cylinder head body 110, and a cooling labyrinth disposed within the oil-gas separation chamber. Cooling airflow from the engine's main cooling passage is introduced into the cylinder head assembly's cooling passage via the air guide shroud 200 to quickly remove heat from the cylinder head assembly, thereby improving the cooling effect of the oil-gas separator. This, in turn, improves the oil-gas separation effect of the oil-gas separator, allowing more engine oil to condense within the oil-gas separator and flow back to the oil pan, thus reducing oil consumption.

[0033] like Figures 1-5As shown, in this embodiment, the air guide shroud 200 includes a first shroud 210 and a second shroud 220, wherein the first shroud 210 covers the cylinder head cover 120, and the second shroud 220 covers one side of the cylinder head body 110.

[0034] like Figure 2 , Figure 4 , Figure 5 As shown, in this embodiment, an air guide plate 230 is provided on the inner side of the second cover 220. The air guide plate 230 is located on the side of the spark plug 130 away from the air inlet of the main cooling channel. The air guide plate 230 is used to guide the cooling airflow from the main cooling channel to the first cover 210, thereby improving the cooling effect on the cylinder head cover 120.

[0035] like Figure 2 As shown, in this embodiment, a gap is left between the air guide plate 230 and the cylinder head body 110 so that part of the cooling airflow delivered from the main cooling channel can pass through the air guide plate 230 to cool the cylinder head body 110, while the other part is guided by the air guide plate 230 to the cylinder head cover 120 to cool the cylinder head cover 120.

[0036] like Figures 1-5 As shown, in this embodiment, the first cover 210 and the second cover 220 are integrally formed.

[0037] In this embodiment, the distance between the inner wall of the air guide shroud 200 and the outer wall of the cylinder head cover assembly is L, where 0.25cm ≤ L ≤ 1.5cm. If the distance between the inner wall of the air guide shroud 200 and the outer wall of the cylinder head cover assembly is too large, the cooling airflow speed will be slow, resulting in poor cooling performance. Conversely, if the distance between the inner wall of the air guide shroud 200 and the outer wall of the cylinder head cover assembly is too small, less cooling airflow will enter, also resulting in poor cooling performance.

[0038] like Figures 3-5 As shown, in this embodiment, the air guide shroud 200 is provided with a clearance hole 240, which corresponds to the spark plug 130, so that the spark plug 130 can pass through the clearance hole 240 and be exposed, thereby facilitating the maintenance and repair of the spark plug 130.

[0039] like Figures 1-4 As shown, in this embodiment, a sealing element 300 adapted to the clearance hole 240 is provided at the clearance hole 240. The sealing element 300 is sleeved on the spark plug 130, thereby preventing the cooling airflow from flowing out of the clearance hole 240, and thus improving the cooling effect.

[0040] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A cooling structure for a cylinder head assembly, the cylinder head assembly comprising a cylinder head body, an intake valve, an exhaust valve, and a spark plug disposed on the cylinder head body, and a cylinder head cover fastened to the cylinder head body for sealing the intake valve and the exhaust valve, characterized in that, The system includes an air guide shroud that covers the cylinder head cover assembly. A cooling channel for the cylinder head cover assembly is provided between the air guide shroud and the cylinder head cover assembly to allow cooling airflow. The cooling channel for the cylinder head cover assembly is connected to the main cooling channel of the engine so that the cooling airflow in the main cooling channel can enter the cooling channel for the cylinder head cover assembly to cool the cylinder head cover assembly. The air guide shroud includes a first shroud and a second shroud, wherein the first shroud is mounted on the cylinder head cover and the second shroud is mounted on one side of the cylinder head body. An air guide plate is provided on the inner side of the second cover. The air guide plate is located on the side of the spark plug away from the air inlet of the main cooling channel. The air guide plate is used to guide the cooling airflow from the main cooling channel to the first cover to cool the cylinder head cover. A gap is left between the air guide plate and the cylinder head body so that part of the cooling airflow delivered from the main cooling channel can pass through the air guide plate to cool the cylinder head body, while the other part is guided by the air guide plate to the cylinder head cover to cool the cylinder head cover.

2. The cooling structure for the cylinder head assembly according to claim 1, characterized in that, The first cover and the second cover are integrally formed.

3. The cooling structure for the cylinder head assembly according to claim 1 or 2, characterized in that, The distance between the inner wall of the air guide shroud and the outer wall of the cylinder head cover assembly is L, where 0.25cm≤L≤1.5cm.

4. The cooling structure for the cylinder head assembly according to claim 3, characterized in that, The air guide shroud is provided with a clearance hole, which corresponds to the spark plug so that the spark plug can pass through the clearance hole and be exposed.

5. The cooling structure for the cylinder head assembly according to claim 4, characterized in that, A sealing element adapted to the clearance hole is provided at the clearance hole, and the sealing element is sleeved on the spark plug.

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