Pre-combustion assembly, cylinder cover and engine

Abstract

The utility model belongs to the technical field of engines, and discloses a pre-combustion assembly, a cylinder cover and an engine. The pre-combustion assembly comprises a pre-combustion chamber body, a lining, a spark plug and an injection valve, the lining is connected with the pre-combustion chamber body in a sealed mode, the lining is provided with a first installation hole and a second installation hole, the first installation hole and the second installation hole are both communicated with a pre-combustion cavity of the pre-combustion assembly, the spark plug is arranged in the first installation hole in a sealed mode, and the injection valve is arranged in the second installation hole in a sealed mode. According to the pre-combustion assembly, the lining is provided with the first mounting hole and the second mounting hole which are communicated with the pre-combustion cavity, the first mounting hole is used for mounting the spark plug, and the second mounting hole is used for mounting the injection valve, so that the injection valve can directly inject fuel gas into the pre-combustion assembly, and the fuel gas path from the fuel gas valve to the pre-combustion assembly is reduced; and the fuel gas injection response efficiency is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a pre-combustion component, a cylinder head and an engine. Background Art

[0002] The ignition energy of the pre-ignition component is several orders of magnitude higher than that of ordinary spark plugs, significantly improving the lean burn limit of the spark-ignition engine. The pre-ignition component can inject fuel into the pre-ignition component, and the injection phase and injection amount of the fuel need to be controlled by the fuel injection valve.

[0003] The pre-combustion assembly in the prior art usually introduces gas into the pre-combustion assembly by means of an external gas valve on the cylinder head, an external gas pipe, an additional one-way valve and the installation of a gas pipe. This arrangement passes through a long pipeline and requires a long time. For high-speed engines, there is a large time lag from the issuance of the electronic control command to control the gas valve to the gas passing through the pre-combustion injection pipeline of the structure to the gas being injected into the pre-combustion assembly, which affects the gas supply efficiency.

[0004] Therefore, a pre-combustion assembly, a cylinder head and an engine are needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a pre-combustion component, a cylinder head and an engine, which can integrate the injection valve, effectively reduce the cost, and improve the response speed of the gas injection.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A pre-combustion assembly, comprising:

[0008] A pre-combustion chamber body, wherein the pre-combustion chamber body is provided with a pre-combustion cavity;

[0009] A bushing, the bushing is sealed and connected to the pre-combustion chamber body, the bushing is provided with a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are both communicated with the pre-combustion chamber;

[0010] a spark plug, the spark plug being sealably disposed in the first mounting hole;

[0011] An injection valve is sealed and disposed in the second mounting hole.

[0012] As an optional technical solution, the bushing is provided with a threaded hole, the threaded hole is coaxially arranged and connected with the second mounting hole, the threaded hole is connected with the pre-combustion chamber, and the threaded hole is used to connect the injection valve.

[0013] As an optional technical solution, the pre-combustion assembly also includes a sealing gasket, the size of the threaded hole is smaller than the size of the second mounting hole, there is an abutment surface between the threaded hole and the second mounting hole, and the sealing gasket is arranged between the injection valve and the abutment surface.

[0014] As an optional technical solution, the bushing is further provided with an air duct, the axis of the air duct is set at an angle to the axis of the second mounting hole, and both ends of the air duct are respectively connected to the threaded hole and the pre-combustion assembly.

[0015] As an optional technical solution, the pre-combustion assembly further includes a first sealing member, which is arranged between the outer periphery of the injection valve and the inner wall of the second mounting hole.

[0016] As an optional technical solution, the pre-combustion assembly further includes a second seal, which is arranged between the outer periphery of the injection valve and the inner wall of the second mounting hole, and the second seal and the first seal are arranged at intervals.

[0017] As an optional technical solution, the pre-combustion assembly further includes a gas sensor, which is arranged on the periphery of the injection valve and located between the first sealing member and the second sealing member.

[0018] As an optional technical solution, an air inlet hole is provided on the bushing, and the air inlet hole is connected to the air inlet of the injection valve.

[0019] The utility model adopts the following technical solutions:

[0020] The cylinder head comprises a cylinder head body and the pre-combustion assembly as described above, wherein the pre-combustion chamber body and the liner are both sealed and arranged on the cylinder head body.

[0021] The utility model adopts the following technical solutions:

[0022] An engine comprising the above-mentioned cylinder head.

[0023] Beneficial effects of the utility model:

[0024] The utility model discloses a pre-combustion assembly, which includes a pre-combustion chamber body, a bushing, a spark plug and an injection valve. The pre-combustion chamber body is provided with a pre-combustion cavity, the bushing is sealed and connected to the pre-combustion chamber body, the bushing is provided with a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are both connected to the pre-combustion cavity, the axis of the first mounting hole is parallel to the axis of the pre-combustion cavity and are spaced apart, the axis of the second mounting hole is parallel to the axis of the pre-combustion cavity and are spaced apart, the spark plug is sealed in the first mounting hole, and the injection valve is sealed in the second mounting hole. This pre-combustion assembly is provided with a first mounting hole and a second mounting hole connected to the pre-combustion cavity on the bushing, the first mounting hole is used to install the spark plug, the second mounting hole is used to install the injection valve, the axis of the injection valve is parallel to the axis of the spark plug, so that the circumferential size of the pre-combustion assembly is effectively reduced, and the injection valve can directly inject gas into the pre-combustion assembly, reducing the gas path from the gas valve to the pre-combustion assembly, and significantly improving the gas injection response efficiency.

[0025] The utility model also discloses a cylinder head, which includes a cylinder head body and the above-mentioned pre-combustion assembly. The pre-combustion chamber body and the sleeve are both sealed and arranged on the cylinder head body. This cylinder head integrates the injection valve, effectively shortens the flow path of the fuel gas, and improves the injection response efficiency of the fuel gas.

[0026] The utility model discloses an engine, which includes the above-mentioned cylinder head. By integrating the injection valve, the flow path of the fuel gas is effectively shortened, the injection response efficiency of the fuel gas is improved, and the engine performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a pre-combustion assembly according to an embodiment of the present invention;

[0028] Figure 2 It is a cross-sectional view of the pre-combustion assembly and the cylinder head body of an embodiment of the present utility model;

[0029] Figure 3 yes Figure 2 A partial enlarged view of middle A;

[0030] Figure 4 yes Figure 2 A partial enlarged view of B.

[0031] In the picture:

[0032] 2. Cylinder head body; 201. Intake passage;

[0033] 10. Pre-combustion chamber body; 11. Pre-combustion cavity;

[0034] 20. Bushing; 21. First mounting hole; 22. Second mounting hole; 23. Threaded hole; 24. Air duct; 25. Air inlet;

[0035] 30. Spark plug;

[0036] 40. Injection valve; 41. Injection valve body; 411. First sealing groove; 412. Second sealing groove; 42. Connecting stud; 43. Air inlet;

[0037] 50. Sealing gasket; 60. First sealing member; 70. Second sealing member. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0039] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0042] like Figures 1 to 4As shown, a pre-combustion assembly is provided in this embodiment, which includes a pre-combustion chamber body 10, a bushing 20, a spark plug 30 and an injection valve 40. The pre-combustion chamber body 10 is provided with a pre-combustion cavity 11, and the bushing 20 is sealed and connected to the pre-combustion chamber body 10. The bushing 20 is provided with a first mounting hole 21 and a second mounting hole 22. The first mounting hole 21 and the second mounting hole 22 are both connected to the pre-combustion cavity 11. The spark plug 30 is sealed and arranged in the first mounting hole 21, and the injection valve 40 is sealed and arranged in the second mounting hole 22. Specifically, in this embodiment, the pre-combustion chamber body 10 and the bushing 20 of the pre-combustion assembly are sealed and connected, and the bushing 20 is provided with a first mounting hole 21 and a second mounting hole 22 which are connected to the pre-combustion chamber 11. The axis of the first mounting hole 21 is parallel to the axis of the pre-combustion chamber 11 and is spaced apart, and the axis of the second mounting hole 22 is parallel to the axis of the pre-combustion chamber 11 and is spaced apart. The first mounting hole 21 is used to install the spark plug 30, and the second mounting hole 22 is used to install the injection valve 40. During the operation of the engine, the fuel gas enters the pre-combustion chamber 11 after being injected by the injection valve 40 and mixes with the air to form a mixed gas. The spark plug 30 is used to install the spark plug 30, and the second mounting hole 22 is used to install the injection valve 40. During the operation of the engine, the fuel gas enters the pre-combustion chamber 11 and mixes with the air to form a mixed gas. 0 ignites a fixed amount of gas injected by the injection valve 40 in the pre-combustion chamber 11, realizing equivalent combustion of the gas in the pre-combustion chamber 11 in the best state, and the combustion flame is sprayed into the main combustion chamber through the spray hole at the lower part of the pre-combustion chamber body 10. The gas in the main combustion chamber is an ultra-lean mixture of gas and air entering through the intake valve. The jet flame injected into the main combustion chamber by the pre-combustion chamber 11 ignites the main combustion chamber gas, realizing ultra-lean gas combustion. The axis of the injection valve of this pre-combustion assembly is parallel to the axis of the spark plug, which effectively reduces the circumferential size of the pre-combustion assembly and can reduce the gas path from the gas valve to the pre-combustion chamber 11, thereby improving the corresponding efficiency of gas injection and improving the response efficiency of the engine.

[0043] For further information, please refer to Figure 2 and Figure 3 The bushing 20 is provided with a threaded hole 23, which is coaxially arranged and communicated with the second mounting hole 22. The threaded hole 23 is communicated with the pre-combustion chamber 11 and is used to connect the injection valve 40. Specifically, in this embodiment, the injection valve 40 includes an injection valve body 41 and a connecting stud 42. The bushing 20 is provided with a threaded hole 23. The injection valve 40 is threadedly connected to the bushing 20. This connection method has the advantages of stable connection and easy disassembly, and avoids the provision of additional fixing structures, reducing the number of parts.

[0044] For further information, please refer to Figure 3The pre-combustion assembly further includes a sealing gasket 50. The size of the threaded hole 23 is smaller than that of the second mounting hole 22. There is an abutting surface between the threaded hole 23 and the second mounting hole 22. The sealing gasket 50 is disposed between the injection valve 40 and the abutting surface. Specifically, in this embodiment, the diameter of the injection valve body 41 is larger than the diameter of the connecting stud 42. There is a step surface between the injection valve body 41 and the connecting stud 42. The size of the threaded hole 23 is smaller than that of the second mounting hole 22. The injection valve body 41 is located in the second mounting hole 22. The connecting stud 42 and the threaded hole 23 are threadedly connected. The sealing gasket 50 is a copper washer, and the sealing gasket 50 is located between the abutting surface and the step surface. It can ensure the sealing reliability of the injection valve 40 in a high explosion pressure environment, avoid gas leakage, and improve safety in use.

[0045] For further information, please refer to Figure 2 The bushing 20 is further provided with an air passage 24. The axis of the air passage 24 is set at an angle to the axis of the second mounting hole 22. The ends of the air passage 24 are respectively connected to the threaded hole 23 and the pre-combustion assembly. Specifically, in this embodiment, the diameter of the air passage 24 is smaller than the diameter of the threaded hole 23, which can increase the injection speed of the gas and ensure the injection effect of the gas. The axis of the air passage 24 is set at an angle to the axis of the second mounting hole 22. Specifically, the air passage 24 is offset in a direction closer to the pre-combustion chamber 11, ensuring connectivity between the pre-combustion chamber 11 and the injection valve 40, and ensuring normal injection of the gas.

[0046] For further information, please refer to Figure 4 The pre-combustion assembly further includes a first seal 60, which is disposed between the outer periphery of the injection valve 40 and the inner wall of the second mounting hole 22. Specifically, in this embodiment, the pre-combustion assembly further includes the first seal 60. A first sealing groove 411 is disposed on the outer periphery of the injection valve body 41. The first seal 60 is accommodated in the first sealing groove 411 and abuts against the side wall of the second mounting hole 22, thereby ensuring that the gas ejected from the injection valve 40 does not leak from the second mounting hole 22, thereby ensuring safe use.

[0047] Furthermore, the pre-combustion assembly further includes a second seal 70, which is disposed between the outer periphery of the injection valve 40 and the inner wall of the second mounting hole 22, and the second seal 70 and the first seal 60 are spaced apart. Specifically, in this embodiment, the pre-combustion assembly further includes a second seal 70, and a second sealing groove 412 is disposed on the outer periphery of the injection valve body 41. The second sealing groove 412 and the first sealing groove 411 are spaced apart. The second seal 70 is accommodated in the second sealing groove 412 and abuts against the side wall of the second mounting hole 22, thereby making the second seal 70 spaced apart from the first seal 60. The first seal 60 and the second seal 70 form a double seal, further ensuring that the gas ejected from the injection valve 40 will not leak from the second mounting hole 22, thereby ensuring safe use.

[0048] Specifically, in this embodiment, the first sealing member 60 and the second sealing member 70 are both sealing rubber rings, and the second sealing member 70 is disposed on a side of the first sealing member 60 away from the pre-combustion chamber body 10 .

[0049] Furthermore, the pre-combustion assembly also includes a gas sensor, which is disposed on the periphery of the injection valve 40 and located between the first seal 60 and the second seal 70. Specifically, in this embodiment, the gas sensor is disposed between the first seal 60 and the second seal 70, and the gas sensor is electrically connected to the alarm. If the first seal 60 leaks, the gas sensor can sense the leaked gas and transmit a signal to the alarm, causing the alarm to sound an alarm, alerting personnel to the gas leak and promptly inspecting and replacing the first seal 60 and the second seal 70 to avoid gas leaks and improve user safety.

[0050] Specifically, in this embodiment, by providing a first seal 60, a second seal 70 and a gas sensor, this pre-combustion component can meet the double sealing and detection requirements of the classification society, comply with ship regulations, be suitable for ship engines, and improve the versatility of the pre-combustion component.

[0051] Furthermore, the bushing 20 is provided with an air inlet 25, which is communicated with the air inlet 43 of the injection valve 40. Specifically, in this embodiment, the bushing 20 is provided with an air inlet 25, which is communicated with the air inlet 43 of the injection valve 40, for providing fuel gas to the injection valve 40.

[0052] This embodiment also provides a cylinder head, which includes a cylinder head body 2 and the above-mentioned pre-combustion assembly, with the pre-combustion chamber body 10 and the liner 20 both being sealed and disposed in the cylinder head body 2. Specifically, in this embodiment, a mounting groove is provided on the cylinder head, the pre-combustion chamber body 10 is mounted at the bottom of the mounting groove, and the outlet of the pre-combustion assembly extends out of the cylinder head body 2. The liner 20 is locked to the cylinder head body 2 by a locking member, and the liner 20 and the pre-combustion assembly are sealed and connected. An intake passage 201 is provided on the cylinder head body 2, and the intake passage 201 is communicated with the intake hole 25 of the liner 20 for providing fuel gas to the injection valve 40.

[0053] In this embodiment, since the cylinder head body 2 is provided with an intake passage 201 and a water cavity for accommodating coolant, a vent pipe is required in the intake passage 201 when the trajectory of the intake passage 201 passes through the water cavity. The vent pipe is sealed in the water cavity to prevent gas leakage into the water cavity. Before installation, the vent pipe needs to be soaked in liquid nitrogen (-196°C) and then installed at a low temperature. Thermal expansion creates an interference seal to prevent gas leakage.

[0054] This embodiment also provides an engine, which includes the above-mentioned cylinder head. By integrating the injection valve 40, the flow path of the fuel gas is effectively shortened, the injection response efficiency of the fuel gas is improved, and the engine performance is improved.

[0055] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Pre-combustion assembly, characterized in that, The pre-combustion assembly comprises: A pre-combustion chamber body (10), wherein the pre-combustion chamber body (10) is provided with a pre-combustion cavity (11); a bushing (20), the bushing (20) being sealedly connected to the pre-combustion chamber body (10), the bushing (20) being provided with a first mounting hole (21) and a second mounting hole (22), the first mounting hole (21) and the second mounting hole (22) both being in communication with the pre-combustion chamber (11); a spark plug (30), the spark plug (30) being sealed and disposed in the first mounting hole (21); An injection valve (40) is sealed and disposed in the second mounting hole (22).

2. The pre-combustion assembly according to claim 1, characterized in that The bushing (20) is provided with a threaded hole (23), the threaded hole (23) is coaxially arranged and communicated with the second mounting hole (22), the threaded hole (23) is communicated with the pre-combustion chamber (11), and the threaded hole (23) is used to connect the injection valve (40).

3. The pre-combustion assembly according to claim 2, characterized in that The pre-combustion assembly further includes a sealing gasket (50), the size of the threaded hole (23) is smaller than the size of the second mounting hole (22), an abutting surface is provided between the threaded hole (23) and the second mounting hole (22), and the sealing gasket (50) is arranged between the injection valve (40) and the abutting surface.

4. The pre-combustion assembly according to claim 3, characterized in that The bushing (20) is further provided with an air passage (24), the axis of the air passage (24) being arranged at an angle to the axis of the second mounting hole (22), and the two ends of the air passage (24) being respectively connected to the threaded hole (23) and the pre-combustion chamber (11).

5. The pre-combustion assembly according to claim 1, characterized in that The pre-combustion assembly further includes a first sealing member (60), which is disposed between the outer periphery of the injection valve (40) and the inner wall of the second mounting hole (22).

6. The pre-combustion assembly according to claim 5, characterized in that The pre-combustion assembly further includes a second sealing member (70), which is arranged between the outer periphery of the injection valve (40) and the inner wall of the second mounting hole (22), and the second sealing member (70) and the first sealing member (60) are arranged at intervals.

7. The pre-combustion assembly according to claim 6, characterized in that The pre-combustion assembly further comprises a gas sensor, which is arranged between the first sealing member (60) and the second sealing member (70).

8. The pre-combustion assembly according to any one of claims 1 to 7, characterized in that: An air inlet hole (25) is provided on the bushing (20), and the air inlet hole (25) is communicated with the air inlet (43) of the injection valve (40).

9. A cylinder head, comprising a cylinder head body (2), characterized in that: The cylinder head further comprises a pre-combustion assembly according to any one of claims 1 to 8, wherein the pre-combustion chamber body (10) and the liner (20) are both sealed and arranged on the cylinder head body (2).

10. An engine, characterized in that The engine includes the cylinder head according to claim 9.

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