An engine cylinder head

Abstract

The application provides an engine cylinder head, comprising a cylinder head body, the cylinder head body is provided with a mounting space for mounting a spark plug, a ventilation cavity is recessed on the side of the cylinder head body away from the mounting space, the ventilation cavity is communicated with the mounting space, and the ventilation cavity penetrates through the cylinder head body along the air inlet direction of the cylinder head body. The engine cylinder head is provided with the ventilation cavity on the side away from the mounting space, and the ventilation cavity penetrates through the cylinder head body along the air inlet direction of the cylinder head body, so that the existence of the ventilation cavity correspondingly reduces the obstruction of the cylinder head body to the cooling airflow, increases the cooling space inside the cylinder head body, the passing property of the cooling airflow through the cylinder head body is better, and the area of heat exchange between the cylinder head body and the cooling airflow is larger, so that the cooling and heat dissipation effect of the cylinder head body is improved.

Description

Technical Field

[0001] This invention relates to the field of cylinder head technology, and more specifically to an engine cylinder head. Background Technology

[0002] A generator set is a mechanical device that converts mechanical energy into electrical energy. Generator sets have a wide range of applications in industrial and agricultural production, as well as daily life. One of the most important components of a generator set is the engine, which contains a combustion chamber, an intake passage, an exhaust passage, and other main structures. The mixed combustion gases enter the combustion chamber through the intake passage, are burned to produce power, and are then discharged through the exhaust passage, thus enabling the engine to continuously output power.

[0003] Current engine cylinder heads and blocks are assembled using multiple bolts. To ensure a complete seal between the cylinder head and block, two or three mounting holes are typically provided on both the spark plug mounting side and the side away from the spark plug on the cylinder head. Since the top of the cylinder head has grooves for mounting rocker arm supports and tappets, the two bolts mounted on the side of the cylinder head away from the spark plug can only connect to the cylinder block by passing through these grooves. To seal these grooves and prevent oil leakage, a support structure needs to be designed inside the cylinder head to accommodate the bolts and tappets, thus eliminating the impact of the bolts passing through the grooves.

[0004] This results in the inability to design extra cooling space inside the cylinder head, and the support structure will also block the flow of cooling air, thereby reducing the cooling and heat dissipation effect of the cylinder head. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the purpose of this invention is to provide an engine cylinder head that increases the cooling space inside the cylinder head body, thereby facilitating the flow of cooling air.

[0006] To achieve the above objectives, the present invention provides an engine cylinder head, including a cylinder head body; the cylinder head body is provided with an installation space, and a ventilation cavity is recessed on the side of the cylinder head body opposite to the installation space, the ventilation cavity is connected to the installation space, and the ventilation cavity extends through the cylinder head body along the air intake direction of the cylinder head body.

[0007] Preferably, the top of the cylinder head body is recessed to form a receiving groove, and two clearance holes pass through the receiving groove, which communicate with the ventilation cavity; the bottom of the ventilation cavity has two first mounting holes, each of which corresponds to one clearance hole.

[0008] Preferably, the receiving groove is provided with a rocker arm support, and the rocker arm support seals and blocks the two clearance holes.

[0009] Preferably, the receiving groove is provided with two first bosses, and each of the clearance holes is opened in the corresponding first boss; the top surface of the first boss is formed with a mating surface, and the rocker arm support is sealed and fitted on the two mating surfaces.

[0010] Preferably, the ventilation cavity is provided with two second bosses, and each of the first mounting holes is opened in the corresponding second boss; one of the second bosses is connected to the intake pipe of the cylinder head body, and the other second boss is connected to the exhaust pipe of the cylinder head body.

[0011] Preferably, the second protrusion near the intake pipe of the cylinder head body has a first air guide hole, and the second protrusion near the exhaust pipe of the cylinder head body has a second air guide hole. The second air guide hole is arranged corresponding to the first air guide hole, and both the second air guide hole and the first air guide hole extend along the air intake direction of the cylinder head body.

[0012] Preferably, the bottom of the ventilation cavity has a third air guide hole, which is located between the two second protrusions.

[0013] Preferably, the ventilation cavity is provided with a guide vane, and a guide groove is formed between the guide vane and the bottom of the ventilation cavity. The guide groove is connected to the first guide hole and the third guide hole respectively, and the second boss near the exhaust pipe of the cylinder head body blocks the guide groove.

[0014] Preferably, the receiving groove has two first connecting holes that communicate with the ventilation cavity; the bottom of the ventilation cavity has two second connecting holes that correspond to one of the first connecting holes; it also includes two connecting pipes, both of which are located in the ventilation cavity, and the two ends of the connecting pipes are respectively connected to the corresponding first connecting hole and the second connecting hole.

[0015] Preferably, the ventilation cavity is provided with two support columns, and the two ends of the support columns are respectively connected to the top and bottom of the ventilation cavity.

[0016] The beneficial effects of this invention are:

[0017] This invention discloses an engine cylinder head, which features a ventilation recess designed on the side away from the mounting space. Since the ventilation recess extends through the cylinder head body along the air intake direction, the presence of the ventilation recess reduces the obstruction of the cooling airflow by the cylinder head body, increases the cooling space inside the cylinder head body, improves the passage of the cooling airflow through the cylinder head body, and increases the area for heat exchange between the cylinder head body and the cooling airflow. As a result, the cooling and heat dissipation effect of the cylinder head body is improved. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying 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.

[0019] Figure 1 This is a schematic diagram of the cylinder head body.

[0020] Figure 2 This is a schematic diagram of the structure inside the receiving tank;

[0021] Figure 3 This is a schematic diagram of the structure inside the ventilation cavity;

[0022] Figure 4 This is a schematic diagram of the structure of the first boss;

[0023] Figure 5 This is a schematic diagram of the structure where bolts are installed on the first boss;

[0024] Figure 6 A schematic diagram of the structure used to seal the two clearance holes of the rocker arm support;

[0025] Figure 7 for Figure 1 Schematic diagram of AA section in the middle;

[0026] Figure 8 This is a schematic diagram of the structure of the air guide vanes, air guide grooves, and the third air guide hole;

[0027] Figure 9 This is a schematic diagram of the cylinder head structure;

[0028] Figure label:

[0029] 100-Cylinder head body, 101-Installation space, 102-Ventilation cavity, 103-Receiving groove, 104-Avoidance hole, 105-First mounting hole, 106-First boss, 107-Second boss, 108-First air guide hole, 109-Second air guide hole, 110-Third air guide hole, 111-Air guide blade, 112-Flow guide groove, 113-First connecting hole, 114-Second connecting hole, 115-Support column, 116-Third mounting hole;

[0030] 200-rocker arm support;

[0031] 300-Connecting pipe;

[0032] 400 - Spark plug;

[0033] 501 - Intake side, 502 - Exhaust side;

[0034] 600-bolt;

[0035] 700-puller. Detailed Implementation

[0036] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0037] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0038] 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 the present invention 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 the present invention.

[0039] 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 invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances.

[0041] 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.

[0042] like Figure 1-9 As shown, in one embodiment of the present invention, an engine cylinder head is provided, including a cylinder head body 100. The cylinder head body 100 is provided with a mounting space 101 for mounting a spark plug 400. A ventilation cavity 102 is recessed on one side of the cylinder head body 100 away from the mounting space 101, and the ventilation cavity 102 communicates with the mounting space 101. The ventilation cavity 102 extends through the cylinder head body 100 along the air intake direction. An intake side 501 and an exhaust side 502 are respectively formed on the other two sides of the cylinder head body 100. The intake side 501 refers to one side of the intake pipe of the cylinder head body 100, and the exhaust side 502 refers to one side of the exhaust pipe of the cylinder head body 100. The air intake direction of the cylinder head body 100 refers to the direction from the intake side 501 to the exhaust side 502.

[0043] The cylinder head body 100 is connected to the cylinder block to form an engine. The engine is installed inside the generator set's housing, which also houses the generator and muffler (neither shown in the attached drawings). The generator, engine, and muffler are arranged sequentially. When the engine drives the generator, the impeller on the generator rotates at high speed, creating a negative pressure inside the housing. Outside air is drawn into the housing and forms a cooling airflow. This cooling airflow first cools the generator, and then blows onto the cylinder block and cylinder head body 100.

[0044] Cooling airflow blows from the intake side 501 towards the cylinder head body 100. A portion of this cooling airflow is directed towards the mounting space 101, cooling the spark plug 400 within it. The remaining cooling airflow is directed towards the ventilation cavity 102, carrying away some heat from the cylinder head body 100 as it flows through the cavity. This airflow then reaches the muffler, cooling it. Furthermore, since the mounting space 101 is connected to the ventilation cavity 102, the airflow within both spaces can circulate, further enhancing the cooling effect on the cylinder head body 100.

[0045] This embodiment discloses an engine cylinder head, which has a ventilation cavity 102 designed on the side away from the mounting space 101. Since the ventilation cavity 102 runs through the cylinder head body 100 along the air intake direction of the cylinder head body 100, the presence of the ventilation cavity 102 reduces the obstruction of the cooling airflow by the cylinder head body 100, increases the cooling space inside the cylinder head body 100, improves the passage of the cooling airflow through the cylinder head body 100, and increases the area of ​​heat exchange between the cylinder head body 100 and the cooling airflow. In this way, the cooling and heat dissipation effect of the cylinder head body 100 is improved.

[0046] In one embodiment, the top of the cylinder head body 100 is recessed to form a receiving groove 103, and two clearance holes 104 pass through the receiving groove 103, communicating with the ventilation cavity 102. The bottom of the ventilation cavity 102 has two first mounting holes 105, each first mounting hole 105 corresponding to one clearance hole 104.

[0047] Two second mounting holes penetrate the mounting space 101, and a third mounting hole 116 penetrates the bottom of the ventilation cavity 102. Five fourth mounting holes are provided on the cylinder body. When assembling the cylinder head body 100 with the cylinder body, these five fourth mounting holes are respectively aligned with two first mounting holes 105, two second mounting holes and one third mounting hole 116. The first mounting holes 105, second mounting holes and third mounting holes 116 are all fastened to the fourth mounting holes by bolts 600.

[0048] Because the height of the ventilation cavity 102 is insufficient to screw the bolt 600 into the two first mounting holes 105, two clearance holes 104 are designed in the receiving groove 103. The bolt 600 can then be screwed into the first mounting hole 105 and the fourth mounting hole through the clearance holes 104. After the bolt 600 is tightened, its head is located within the ventilation cavity 102. As for the two clearance holes 104, after the two bolts 600 are installed, other sealing components can be designed in the receiving groove 103 to seal them.

[0049] Conventional cylinder head structures, due to the need to accommodate the installation of bolts 600, cannot provide extra cooling space on the side of the cylinder head body 100 away from the mounting space 101. However, the engine cylinder head design in this embodiment abandons the conventional cylinder head structural design concept. The cooperation between the ventilation cavity 102, the clearance hole 104, and the first mounting hole 105 not only satisfies the installation of bolts 600, but also reduces the obstruction of the cooling airflow by the cylinder head body 100, increases the internal cooling space of the cylinder head body 100, and thus improves the cooling and heat dissipation effect of the cylinder head body 100.

[0050] In one embodiment, a rocker arm support 200 is provided within the receiving groove 103, which seals and blocks two clearance holes 104. During assembly, the operator first installs the cylinder head body 100 onto the cylinder block, and screws the bolts 600 through the clearance holes 104 into the first mounting hole 105 and the fourth mounting hole, thereby achieving a tight connection between the cylinder block and the cylinder head body 100. Then, the rocker arm support 200 is installed in the receiving groove 103 to seal and block the two clearance holes 104. After the other components within the receiving groove 103 are assembled, the cylinder head is then installed over the receiving groove 103. Of course, to ensure the sealing effect of the rocker arm support 200 on the two clearance holes 104, a sealing gasket is provided at the bottom of the rocker arm support 200.

[0051] This structural design uses the rocker arm support 200 to seal the two clearance holes 104, eliminating the need for additional sealing components to seal the two clearance holes 104. This reduces the number of parts in the cylinder head body 100 and optimizes the overall structure of the cylinder head body 100.

[0052] In one embodiment, the receiving groove 103 is provided with two first bosses 106, and each clearance hole 104 is formed in the corresponding first boss 106. The top surface of the first boss 106 forms a mating surface, and the rocker arm support 200 is sealed and fitted to the two mating surfaces. The design of the two first bosses 106 can provide good support for the rocker arm support 200 and reduce the assembly difficulty of the rocker arm support 200.

[0053] In one embodiment, the ventilation cavity 102 is provided with two second bosses 107, and each first mounting hole 105 is formed in the corresponding second boss 107. One second boss 107 is connected to the intake pipe of the cylinder head body 100, and the other second boss 107 is connected to the exhaust pipe of the cylinder head body 100. The design of the second bosses 107 can improve the connection strength between the cylinder head body 100 and the cylinder block after the mounting bolts 600 are tightened. At the same time, the connection of the two second bosses 107 to the intake pipe and exhaust pipe of the cylinder head body 100 respectively also enhances the overall structural strength of the cylinder head body 100.

[0054] In one embodiment, see Figure 1 and Figure 7A second protrusion 107 near the intake pipe of the cylinder head body 100 has a first air guide hole 108 through it, and a second protrusion 107 near the exhaust pipe of the cylinder head body 100 has a second air guide hole 109 through it. The second air guide hole 109 is arranged correspondingly to the first air guide hole 108, and both the second air guide hole 109 and the first air guide hole 108 extend along the air intake direction of the cylinder head body 100. Since the two second protrusions 107 are respectively provided with the first air guide hole 108 and the second air guide hole 109, a portion of the cooling airflow will also enter the first air guide hole 108 and be discharged from the second air guide hole 109 during the process of blowing towards the ventilation cavity 102, thereby achieving heat dissipation for the cylinder head body 100. The design of the first air guide hole 108 and the second air guide hole 109 can reduce the obstruction effect of the two second protrusions 107 on the cooling airflow and ensure the cooling effect of the cooling airflow on the cylinder head body 100.

[0055] In one embodiment, a third air guide hole 110 extends through the bottom of the ventilation cavity 102, and the third air guide hole 110 is located between the two second protrusions 107. Due to the presence of the third through hole, some of the cooling airflow entering the ventilation cavity 102 will be guided to the cylinder liner side of the cylinder block through the third air guide hole 110, thereby carrying away some of the heat from the cylinder block and cylinder liner, thus improving the cooling effect on the cylinder block.

[0056] In one embodiment, a guide vane 111 is provided inside the ventilation cavity 102, and a guide groove 112 is formed between the guide vane 111 and the bottom of the ventilation cavity 102. The guide groove 112 communicates with the first air guide hole 108 and the third air guide hole 110 respectively. The second boss 107 near the exhaust pipe of the cylinder head body 100 blocks the guide groove 112. After the cooling airflow enters the first air guide hole 108, under the obstruction of the guide vane 111, part of the cooling airflow will flow to the guide groove 112 and eventually be guided to the third air guide hole 110. The other part of the cooling airflow will flow along the guide vane 111 to the second air guide hole 109.

[0057] In one embodiment, two first connecting holes 113 penetrate the receiving groove 103, and the first connecting holes 113 communicate with the ventilation cavity 102. Two second connecting holes 114 penetrate the bottom of the ventilation cavity 102, and each second connecting hole 114 corresponds to one first connecting hole 113. The cylinder head body 100 also includes two connecting pipes 300, both of which are disposed within the ventilation cavity 102, and their two ends are respectively connected to the corresponding first connecting hole 113 and second connecting hole 114.

[0058] Two connecting pipes 300 are press-fitted into the ventilation cavity 102 after the cylinder head body 100 is formed. The connecting pipes 300 are designed to connect the first connecting hole 113 and the second connecting hole 114 respectively. The structure formed by the first connecting hole 113, the connecting pipes 300 and the second connecting hole 114 can be used to accommodate the tappets 700. After the cylinder body, cylinder head body 100 and cylinder head are assembled, this structure can cooperate with the tappet cavity on the cylinder body to isolate the two tappets 700 from the outside world.

[0059] In one embodiment, in order to improve the overall structural strength of the ventilation cavity 102 and the cylinder head body 100, two support columns 115 are provided in the ventilation cavity 102, and the two ends of the support columns 115 are respectively connected to the top and bottom of the ventilation cavity 102.

[0060] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the 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.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention 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 therein. 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 the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. An engine cylinder head, characterized in that, Including the cylinder head body; The cylinder head body is provided with an installation space. A ventilation cavity is formed by a recess on the side of the cylinder head body away from the installation space. The ventilation cavity is connected to the installation space and extends through the cylinder head body along the air intake direction. The top of the cylinder head body is recessed to form a receiving groove, and two clearance holes pass through the receiving groove. The clearance holes communicate with the ventilation cavity. The bottom of the ventilation cavity has two first mounting holes, and each first mounting hole corresponds to one clearance hole. The ventilation cavity is provided with two support columns, and the two ends of the support columns are respectively connected to the top and bottom of the ventilation cavity.

2. The engine cylinder head according to claim 1, characterized in that, The receiving groove is provided with a rocker arm support, which seals and blocks the two clearance holes.

3. The engine cylinder head according to claim 2, characterized in that, The receiving groove is provided with two first protrusions, and each of the clearance holes is opened in the corresponding first protrusion; the top surface of the first protrusion forms a mating surface, and the rocker arm support is sealed and fitted on the two mating surfaces.

4. The engine cylinder head according to claim 1, characterized in that, The ventilation cavity is provided with two second protrusions, and each of the first mounting holes is opened in the corresponding second protrusion; one of the second protrusions is connected to the intake pipe of the cylinder head body, and the other second protrusion is connected to the exhaust pipe of the cylinder head body.

5. The engine cylinder head according to claim 4, characterized in that, The second protrusion near the intake pipe of the cylinder head body has a first air guide hole, and the second protrusion near the exhaust pipe of the cylinder head body has a second air guide hole. The second air guide hole is arranged corresponding to the first air guide hole, and both the second air guide hole and the first air guide hole extend along the air intake direction of the cylinder head body.

6. The engine cylinder head according to claim 5, characterized in that, The bottom of the ventilation cavity has a third air guide hole, which is located between the two second protrusions.

7. The engine cylinder head according to claim 6, characterized in that, The ventilation cavity is provided with air guide vanes, and a flow guide groove is formed between the air guide vanes and the bottom of the ventilation cavity. The flow guide groove is connected to the first air guide hole and the third air guide hole respectively. The second boss near the exhaust pipe of the cylinder head body blocks the flow guide groove.

8. The engine cylinder head according to claim 1, characterized in that, The receiving groove has two first connecting holes that communicate with the ventilation cavity; the bottom of the ventilation cavity has two second connecting holes that correspond to one of the first connecting holes. It also includes two connecting pipes, both of which are located inside the ventilation cavity, and the two ends of the connecting pipes are respectively connected to the first connecting hole and the second connecting hole.

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