Engine cylinder head cover and engine

Abstract

The utility model relates to the field of engines, in particular to an engine cylinder head cover and an engine. The engine cylinder head cover comprises a cylinder head cover body, an ignition device, an oil injection assembly and a pre-combustion chamber. The pre-combustion chamber comprises a mounting plate and a chamber main body; the cavity body extends into the cylinder head cover body, and an opening is formed in the top of the cavity body. The oil injection assembly comprises an oil injector which enters the cavity body from the opening. The ignition device penetrates through the cylinder head cover body; the chamber main body is provided with a first socket, and a spark plug of the ignition device enters the chamber main body from the first socket; a communicating hole is formed in the bottom end of the chamber main body; the mounting plate is connected with the top of the chamber main body, and the mounting plate is used for being connected with a cylinder cover; a receding opening is formed in the cylinder head cover body and used for containing the mounting plate. Fuel oil can directly enter the pre-combustion chamber to be fully atomized, and the quality and combustion stability of mixed gas are improved. And the optimization of the space layout of the engine cylinder head cover can be realized, and the structural compactness is ensured.

Description

Technical Field

[0001] This application relates to the field of engines, and in particular to an engine cylinder head cover and an engine. Background Technology

[0002] In the existing technology, for engines equipped with a pre-combustion chamber, the ignition coil of the ignition device is located outside the cylinder head cover, the connecting rod of the ignition device passes through the cylinder head cover and extends into the inside of the cylinder head cover, the bottom of the connecting rod is equipped with a spark plug, and the bottom of the spark plug integrates the pre-combustion chamber. The fuel injected by the fuel injection assembly needs to passively enter the pre-combustion chamber for ignition, resulting in poor combustion effect. Utility Model Content

[0003] The purpose of this application is to provide an engine cylinder head cover and an engine that allows the fuel injected by the injector to directly enter the pre-combustion chamber and be fully atomized, thereby improving the quality of the air-fuel mixture and combustion stability.

[0004] This application provides an engine cylinder head cover, including a cylinder head cover body, an ignition device, a fuel injection assembly, and a pre-combustion chamber;

[0005] The pre-combustion chamber includes a mounting plate and a chamber body; the chamber body extends into the cylinder head cover body, and an opening is provided at the top of the chamber body; the fuel injection assembly includes a fuel injector, which enters the chamber body through the opening; the chamber body is provided with a first socket, and the spark plug of the ignition device enters the chamber body through the first socket; a connecting hole is provided at the bottom of the chamber body;

[0006] The mounting plate is connected to the top of the chamber body and is used to connect to the cylinder head; the cylinder head cover body has an opening for accommodating the mounting plate.

[0007] In the above technical solution, the number of pre-combustion chambers is multiple, and the multiple pre-combustion chambers are spaced apart along the length direction of the cylinder head cover body; the fuel injector and the ignition device are correspondingly arranged with the pre-combustion chambers;

[0008] The cylinder head cover body has multiple clearance openings, and a connecting beam is provided between two adjacent clearance openings.

[0009] In the above technical solution, the connecting beam is further described as a thinned structure.

[0010] In the above technical solution, the size of the clearance opening is further configured such that the ignition device passes through the clearance opening to enter the cylinder head cover body.

[0011] Furthermore, the above technical solution also includes a pressure sensor;

[0012] The clearance opening is sized to allow the connecting wire of the pressure sensor to pass through the clearance opening and enter the cylinder head cover body;

[0013] A second port is provided at the bottom of the chamber body, and the sensing part of the pressure sensor enters the chamber body through the second port.

[0014] In the above technical solution, the fuel injection assembly further includes a fuel rail;

[0015] The oil rail is located on the outside of the cylinder head cover body, and the oil rail is connected to the injector;

[0016] The oil rail is provided with a connecting lug, and a connecting column is provided on the connecting beam. The connecting lug is connected to the connecting column so that the oil rail is adjacent to the pre-combustion chamber.

[0017] In the above technical solution, the fuel injection assembly further includes a fuel pump, which is connected to the fuel rail via a pipeline;

[0018] An mounting component is provided on the outer side of the cylinder head cover body. The oil pump is connected to the mounting component, and the mounting component can accommodate the tappet of the oil pump.

[0019] In the above technical solution, a gas passage is further provided at one end of the cylinder head cover body in the width direction; the first end of the gas passage is used to connect to the outlet of the turbocharger, and the second end of the gas passage is used to connect to the inlet of the intercooler.

[0020] In the above technical solution, a pipe connector is further provided in the middle of the air passage. The pipe connector is used to connect with the pressure relief valve, and the lumen of the pipe connector is in communication with the air passage.

[0021] This application also provides an engine, including the engine cylinder head cover described above.

[0022] Compared with the prior art, the beneficial effects of this application are as follows:

[0023] The engine cylinder head cover provided in this application, by setting the spark plug and pre-combustion chamber as independent structures and placing the fuel injector in the pre-combustion chamber, allows the fuel to directly enter the pre-combustion chamber and be fully atomized. Furthermore, the spark plug is inserted into the main body of the chamber, thereby improving the quality of the air-fuel mixture and combustion stability. The pre-combustion chamber can be stably installed on the cylinder head, and the cylinder head cover body has an opening to accommodate the mounting plate, achieving optimized space layout and ensuring structural compactness.

[0024] This application also provides an engine, including the engine cylinder head cover described in the above-described scheme. Based on the above analysis, it is clear that the engine also possesses the aforementioned beneficial effects, which will not be elaborated upon further here. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of the engine cylinder head cover provided in this application;

[0027] Figure 2 A first structural schematic diagram of the cylinder head cover body provided in this application;

[0028] Figure 3 This is a schematic diagram of the second structure of the cylinder head cover body provided in this application;

[0029] Figure 4 A cross-sectional structural schematic diagram of the cylinder head cover body provided in this application;

[0030] Figure 5 A schematic diagram of the assembly structure of the ignition device, fuel injection assembly and pre-combustion chamber provided in this application.

[0031] In the diagram: 101-Cylinder head cover body; 102-Ignition device; 103-Pre-combustion chamber; 104-Mounting plate; 105-Cavity body; 106-Injector; 107-Connecting hole; 108-Cylinder head; 109-Allowing port; 110-Connecting beam; 111-Ignition coil; 112-High-voltage damping wire; 113-Spark plug; 114-Pressure sensor; 115-Fuel rail; 116-Connecting column; 117-Fuel pump; 118-Mounting component; 119-Intake passage; 120-First end port; 121-Second end port; 122-Pipe connector. Detailed Implementation

[0032] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Example 1

[0036] See Figures 1 to 5 As shown, the engine cylinder head cover provided in this application includes a cylinder head cover body 101, an ignition device 102, a fuel injection assembly, and a pre-combustion chamber 103. The pre-combustion chamber 103 includes a mounting plate 104 and a chamber body 105; the chamber body 105 extends into the cylinder head cover body 101 and into the cylinder head 108, and has an opening at its top; the fuel injection assembly includes an injector 106, which enters the chamber body 105 through the opening to ensure precise injection and full atomization of fuel within the pre-combustion chamber 103, thereby improving the quality of the air-fuel mixture and combustion stability. The ignition device 102 penetrates the cylinder head cover body 101; a first socket is provided at the bottom of the chamber body 105, and the spark plug 113 of the ignition device 102 enters the chamber body 105 through the first socket to ignite the air-fuel mixture in the pre-combustion chamber 103. A connecting hole 107 is provided at the bottom of the chamber body 105 to connect to the main combustion chamber.

[0037] Mounting plate 104 is connected to the top of the chamber body 105, and is also used to connect to the side of cylinder head 108 facing cylinder head cover body 101. The pre-combustion chamber 103 can be hoisted onto cylinder head 108 via mounting plate 104, enabling stable installation of the pre-combustion chamber 103. Specifically, mounting plate 104 has two connecting holes; bolts passing through these holes allow mounting plate 104 to be installed onto cylinder head 108. Cylinder head cover body 101 has a clearance opening 109 to accommodate mounting plate 104, optimizing space layout, simplifying assembly, and ensuring structural compactness.

[0038] The engine cylinder head cover provided in this application, by setting the spark plug 113 and the pre-combustion chamber 103 as independent structures and placing the fuel injector 106 inside the pre-combustion chamber 103, allows the fuel to directly enter the pre-combustion chamber 103 and be fully atomized. Furthermore, the spark plug 113 is inserted into the chamber body 105, thereby improving the quality of the air-fuel mixture and combustion stability. The pre-combustion chamber 103 can be stably installed on the cylinder head 108, and the cylinder head cover body 101 has an opening 109 to accommodate the mounting plate 104, achieving optimized spatial layout and ensuring structural compactness.

[0039] In this embodiment, there are multiple pre-combustion chambers 103, which are spaced apart along the length of the cylinder head cover body 101. Injectors 106 are correspondingly arranged with respect to the pre-combustion chambers 103. The cylinder head cover body 101 has multiple clearance openings 109, and a connecting beam 110 is provided between adjacent clearance openings 109.

[0040] Preferably, the connecting beam 110 has a thinned structure.

[0041] In this embodiment, such as Figure 1 and Figure 5 As shown in the figure, four pre-combustion chambers 103 are illustrated, each equipped with an injector 106. This design enables a more uniform combustion distribution and improves overall combustion efficiency. The arrangement of multiple pre-combustion chambers 103 allows for better control of heat distribution and reduces heat concentration, thereby minimizing the impact of thermal stress on engine components and extending their service life. The connecting beam 110 between adjacent clearance openings 109 enhances the overall rigidity of the cylinder head cover body 101, reducing vibration and deformation and improving engine reliability and durability. The connecting beam 110 features a thinned structure, reducing the weight of the cylinder head cover body 101 while meeting strength requirements.

[0042] In an optional embodiment, the engine cylinder head cover also includes an ignition device 102; the ignition device 102 is correspondingly provided with the pre-combustion chamber 103; the size of the clearance opening 109 is configured such that the ignition device 102 passes through the clearance opening 109 to enter the cylinder head cover body 101.

[0043] In this embodiment, each pre-combustion chamber 103 is equipped with an ignition device 102 to ensure that the air-fuel mixture in each pre-combustion chamber 103 can be accurately ignited. Figure 5As shown, the ignition device 102 includes an ignition coil 111, a high-voltage damping wire 112, and a spark plug 113 connected in sequence. The ignition coil 111 is located on the outside of the cylinder head cover body 101 (the side away from the cylinder head 108). The clearance opening 109 has dimensions of 29.2mm × 18.7mm. The clearance opening 109 is larger than the mounting plate 104, allowing it to not only avoid the mounting plate 104 but also enabling the high-voltage damping wire 112 to pass through the clearance opening 109 and extend into the cylinder head 108. Furthermore, a first insertion port is provided at the bottom of the chamber body 105, allowing the spark plug 113 at the bottom of the high-voltage damping wire 112 to enter the chamber body 105 through the first insertion port, ensuring accurate ignition positioning and improving combustion efficiency.

[0044] In an optional embodiment, the engine cylinder head cover also includes a pressure sensor 114; the size of the clearance opening 109 is configured such that the connecting wire of the pressure sensor 114 passes through the clearance opening 109 to enter the cylinder head cover body 101; a second insertion port is provided at the bottom of the chamber body 105, and the sensing part of the pressure sensor 114 enters the chamber body 105 from the second insertion port.

[0045] In this embodiment, each pre-combustion chamber 103 is equipped with a pressure sensor 114 to ensure real-time monitoring of pressure changes within each pre-combustion chamber 103. The sensing element of the pressure sensor 114 enters the chamber body 105 through a second port, ensuring the accuracy of pressure measurement. The pressure sensor 114 can monitor pressure changes during combustion in real time, providing crucial data for optimizing combustion control strategies. The data from the pressure sensor 114 can help adjust the fuel injection quantity, ignition timing, and intake air volume, thereby achieving more precise combustion control and improving combustion efficiency and power output.

[0046] In an optional embodiment, the fuel injection assembly further includes a fuel rail 115; the fuel rail 115 is located on the outside of the cylinder head cover body 101 and is connected to the fuel injector 106; the fuel rail 115 is provided with a connecting lug, and a connecting post 116 is provided on the connecting beam 110, the connecting lug is connected to the connecting post 116 so that the fuel rail 115 is adjacent to the pre-combustion chamber 103.

[0047] In this embodiment, the fuel rail 115 is connected to multiple injectors 106, ensuring that fuel is evenly distributed to each injector 106. This ensures consistent fuel supply within each pre-combustion chamber 103, improving combustion efficiency and power output. The design of the fuel rail 115 allows for more stable fuel pressure, facilitating more precise injection control, reducing fluctuations in injection quantity, and improving combustion stability.

[0048] Furthermore, the connecting lugs on the fuel rail 115 and the connecting post 116 on the connecting beam 110 can be bolted together, allowing the fuel rail 115 to be securely mounted on the cylinder head cover body 101. The fuel rail 115's proximity to the pre-combustion chamber 103 contributes to a compact structure. The connecting post 116 also increases the strength of the connecting beam 110, thereby increasing the rigidity of the cylinder head cover body 101. Specifically, as... Figure 4 As shown, the connecting column 116 is inclined towards the oil rail 115, and the mounting surface of the connecting column 116 forms a 2° angle with the bottom surface of the cylinder head cover body 101, which facilitates the positioning of the oil rail 115 and the injector 106 and ensures the accuracy of the injection angle of the injector 106.

[0049] In an optional embodiment, the fuel injection assembly further includes a fuel pump 117, which is connected to the fuel rail 115 via a pipeline. This ensures a stable and reliable fuel delivery process from the fuel pump 117 to the fuel rail 115 and then to the fuel injector 106, reducing pressure fluctuations and improving combustion efficiency and power output. A mounting bracket 118 is provided on the outer side of the cylinder head cover body 101. The fuel pump 117 and the mounting bracket 118 can be connected by bolts, making installation convenient and maintenance simple. The mounting bracket 118 can also accommodate the tappets of the fuel pump 117. This structure makes the fuel injection system more compact, reduces space occupation, and facilitates the optimization of the overall engine layout.

[0050] Example 2

[0051] The engine cylinder head cover in this second embodiment is an improvement on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this second embodiment.

[0052] See Figures 1 to 3 As shown, in an optional embodiment, an air passage 119 is provided at one end of the cylinder head cover body 101 in the width direction; the first end port 120 of the air passage 119 is used to connect to the outlet of the turbocharger, and the second end port 121 of the air passage 119 is used to connect to the inlet of the intercooler.

[0053] In this embodiment, by setting the air passage 119, the pressurized air can smoothly enter the intercooler for cooling. Integrating the air passage 119 on the cylinder head cover body 101 reduces the use of external pipes, simplifies the layout of the intake system, and reduces assembly complexity and cost; it also reduces the external space occupation, making the layout in the engine compartment more compact and facilitating the arrangement of other components.

[0054] In an optional embodiment, a pipe connector 122 is provided in the middle of the air passage 119. The pipe connector 122 is used to connect to the pressure relief valve, and the lumen of the pipe connector 122 is connected to the air passage 119.

[0055] In this embodiment, precise control of the pressure relief valve allows for better management of the intake system pressure, ensuring stable intake pressure for the engine under various operating conditions, thereby improving combustion efficiency and power output. The pressure relief valve is directly connected to the air passage 119, reducing delays in the airflow path and improving the system's response speed. When excess pressure needs to be released quickly, it can act rapidly, avoiding the impact of pressure fluctuations on the engine.

[0056] Example 3

[0057] This application provides an engine in embodiment three, which includes the engine cylinder head cover of any of the above embodiments. Therefore, it has all the beneficial technical effects of the engine cylinder head cover of any of the above embodiments, which will not be repeated here.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application 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; and these 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 application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

Claims

1. An engine cylinder head cover, characterized in that, This includes the cylinder head cover body, ignition device, fuel injection assembly, and pre-combustion chamber; The pre-combustion chamber includes a mounting plate and a chamber body; the chamber body extends into the cylinder head cover body, and an opening is provided at the top of the chamber body; the fuel injection assembly includes a fuel injector, which enters the chamber body through the opening; the ignition device penetrates the cylinder head cover body; the chamber body is provided with a first insertion port, and the spark plug of the ignition device enters the chamber body through the first insertion port; a connecting hole is provided at the bottom end of the chamber body; The mounting plate is connected to the top of the chamber body and is used to connect to the cylinder head; the cylinder head cover body has an opening for accommodating the mounting plate.

2. The engine cylinder head cover according to claim 1, characterized in that, The number of pre-combustion chambers is multiple, and the multiple pre-combustion chambers are spaced apart along the length direction of the cylinder head cover body; the fuel injector and the ignition device are correspondingly arranged with the pre-combustion chambers; The cylinder head cover body has multiple clearance openings, and a connecting beam is provided between two adjacent clearance openings.

3. The engine cylinder head cover according to claim 2, characterized in that, The connecting beam has a thinned structure.

4. The engine cylinder head cover according to claim 2, characterized in that, The clearance opening is sized to allow the ignition device to pass through it and enter the cylinder head cover body.

5. The engine cylinder head cover according to claim 4, characterized in that, It also includes pressure sensors; The clearance opening is sized to allow the connecting wire of the pressure sensor to pass through the clearance opening and enter the cylinder head cover body; A second port is provided at the bottom of the chamber body, and the sensing part of the pressure sensor enters the chamber body through the second port.

6. The engine cylinder head cover according to claim 2, characterized in that, The fuel injection assembly also includes a fuel rail; The oil rail is located on the outside of the cylinder head cover body, and the oil rail is connected to the injector; The oil rail is provided with a connecting lug, and a connecting column is provided on the connecting beam. The connecting lug is connected to the connecting column so that the oil rail is adjacent to the pre-combustion chamber.

7. The engine cylinder head cover according to claim 6, characterized in that, The fuel injection assembly also includes a fuel pump, which is connected to the fuel rail via a pipeline; An mounting component is provided on the outer side of the cylinder head cover body. The oil pump is connected to the mounting component, and the mounting component can accommodate the tappet of the oil pump.

8. The engine cylinder head cover according to claim 1, characterized in that, An air passage is provided at one end of the cylinder head cover body in the width direction; the first end of the air passage is used to connect to the outlet of the turbocharger, and the second end of the air passage is used to connect to the inlet of the intercooler.

9. The engine cylinder head cover according to claim 8, characterized in that, A pipe connector is provided in the middle of the air passage. The pipe connector is used to connect to the pressure relief valve, and the lumen of the pipe connector is in communication with the air passage.

10. An engine, characterized in that, Includes the engine cylinder head cover as described in any one of claims 1 to 9.

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