Engine exhaust manifold assembly

Abstract

The utility model discloses an engine exhaust manifold assembly, which relates to the field of exhaust manifold technical equipment, and comprises an outlet flange, a catalyst is arranged at one end of the outlet flange, an exhaust manifold header pipe is arranged at one end of the catalyst, a first manifold section is arranged at one end of the exhaust manifold header pipe, and a second manifold section is arranged at one end of the first manifold section. A plurality of first manifold branch pipes are arranged on one side of the first manifold section, a first noise reduction mechanism is arranged at one end of each first manifold branch pipe, a first inlet flange assembly is jointly arranged at one end of each first noise reduction mechanism, a plurality of second manifold branch pipes are arranged on one side of the second manifold section, and a second noise reduction mechanism is arranged at one end of each second manifold branch pipe. And one ends of the second noise reduction mechanisms are jointly provided with a second inlet flange assembly. The exhaust manifold assembly is scientific and novel in structure, efficient noise reduction of the exhaust manifold assembly can be achieved, and noise generated when an engine exhausts is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of exhaust manifold technical equipment, in particular to an engine exhaust manifold component. Background Art

[0002] The engine exhaust manifold assembly is one of the important parts of the engine. It is located at the connection between the engine cylinder and the exhaust port. Its main function is to collect and guide the exhaust gas generated by each cylinder of the engine to the exhaust port for smooth discharge. The exhaust manifold assembly is usually made of metal materials, such as cast iron, stainless steel, etc., which can withstand high temperature and high pressure exhaust gas flow. Its shape and structure are precisely designed to optimize the flow of exhaust gas and improve the performance of the engine to a certain extent. Through reasonable pipe length and component coordination, it can achieve good exhaust gas discharge and dynamic balance of airflow, thereby improving the power output and fuel economy of the engine.

[0003] For example, Chinese patent CN220101375U discloses an exhaust manifold that is easy to replace, including an installation main pipe, a connecting pipe and a connecting block. The connecting pipe is fixedly installed on one side of the installation main pipe, and the connecting block is fixedly installed on one side of the connecting pipe. When the branch pipe is damaged, the branch pipe can be disassembled and replaced through the components provided, thereby avoiding the inconvenience caused by the need to replace the entire pipe and the increase in practical costs. However, the above exhaust manifold has the following deficiencies in its specific application: First, the device lacks a noise reduction mechanism. When the engine is exhausting, the exhaust gas will continue to generate high-frequency noise when passing through the exhaust manifold assembly, and the continuous noise environment may cause fatigue and inattention of the operator, thereby increasing the risk of accidents; at the same time, the noise of the exhaust manifold assembly is too loud, which will cause the overall exhaust noise of the engine to exceed the specified range, resulting in non-compliance with standard requirements and affecting the production quality of the engine. Utility Model Content

[0004] In view of the problems in the related technology, the utility model proposes an engine exhaust manifold assembly to overcome the above technical problems existing in the existing related technology.

[0005] To this end, the specific technical solutions adopted by the utility model are as follows:

[0006] An engine exhaust manifold assembly comprises an outlet flange, a catalyst is arranged at one end of the outlet flange, an exhaust manifold main pipe is arranged at one end of the catalyst, a first manifold section is arranged at one end of the exhaust manifold main pipe, a second manifold section is arranged at one end of the first manifold section, a plurality of first manifold branches are arranged at one side of the first manifold section, a first noise reduction mechanism is arranged at one end of each of the first manifold branches, a first inlet flange assembly is arranged at one end of the first noise reduction mechanism, a plurality of second manifold branches are arranged at one side of the second manifold section, a second noise reduction mechanism is arranged at one end of each of the second manifold branches, a second inlet flange assembly is arranged at one end of the second noise reduction mechanism, the first noise reduction mechanism and the second noise reduction mechanism have the same structure, and the first inlet flange assembly and the second inlet flange assembly have the same structure.

[0007] Furthermore, in order to effectively reduce the propagation of exhaust noise and lower the noise level of the engine during exhaust, the first noise reduction mechanism includes a vacuum outer tube arranged at one end of the first manifold branch pipe, connecting tubes are symmetrically arranged at both ends of the vacuum outer tube, a fixing ring is arranged at one end of the connecting tube, the cross-section of the connecting tube is arranged to be a conical structure, a plurality of fixing holes are opened on the outer side of the fixing ring, a plurality of mounting holes matching the fixing holes are opened at both ends of the vacuum outer tube, a noise reduction inner tube connected to the first manifold branch pipe is arranged on the inner side of the vacuum outer tube, a noise reduction sleeve is sleeved on the outer side of the middle part of the noise reduction inner tube, a plurality of noise reduction holes arranged in a circle are opened on the outer side of the noise reduction sleeve through the noise reduction inner tube, and a noise dispersion component is arranged in the noise reduction hole.

[0008] Furthermore, in order to reduce the turbulent movement of exhaust gas flow, promote the absorption and scattering of noise, disperse and reduce the propagation of noise, and improve the noise reduction effect of the first noise reduction mechanism, the noise dispersion component includes a circular partition plate arranged on the inner side of the noise reduction hole, a cylindrical diffusion shell is arranged at the top end of the circular partition plate, a plurality of diffusion holes are opened on the outer side of the cylindrical diffusion shell, a circular mounting plate is arranged at the top end of the cylindrical diffusion shell, a plurality of dispersion pipes are penetrated through the top end of the circular mounting plate, and a plurality of dispersion holes matching with the dispersion pipes are opened at the top end of the circular partition plate.

[0009] Furthermore, in order to ensure the smooth flow of exhaust gas discharged from the engine and ensure the tight connection of the exhaust manifold, the first inlet flange assembly includes an inlet flange arranged at one end of the first noise reduction mechanism, and one end of the inlet flange is provided with a plurality of exhaust holes that cooperate with the first noise reduction mechanism, and a plurality of connecting holes are provided on the outside of the exhaust holes, and a buffer gasket is provided at the bottom end of the inlet flange.

[0010] The beneficial effects of the utility model are:

[0011] 1. The utility model has a scientific and novel structure. Through the synergistic effect of the first noise reduction mechanism and the second noise reduction mechanism, the efficient noise reduction of the exhaust manifold assembly is successfully achieved. The noise dispersion assembly effectively reduces the noise generated by the engine exhaust through fluid dynamics adjustment, noise dispersion and absorption, and improves the comfort of the engine working environment. In addition, the design of the first inlet flange assembly and the second inlet flange assembly not only guides the exhaust gas to flow into the noise reduction system, but also ensures the firmness of the connection, prevents engine exhaust leakage, enhances the stability of the entire exhaust manifold assembly, and meets the engine's requirements for exhaust noise level and exhaust system stability.

[0012] 2. By setting up the first noise reduction mechanism, a cavity is formed by utilizing the vacuum outer tube and the connecting tube of the conical structure, thereby reducing the vibration of the airflow during the exhaust of the engine, and the filled glass fiber can eliminate the sound generated during the exhaust, thereby reducing the noise; at the same time, the noise dispersion component cooperates with the diffusion hole on the outside of the cylindrical diffusion shell through the circular partition to disperse and absorb the noise energy when the exhaust gas flows through. The dispersion hole and the dispersion tube further enhance the dispersion effect, making the exhaust gas flow more uniform, reducing turbulence and pressure pulsation, and effectively reducing the noise level of the exhaust manifold component.

[0013] 3. By setting up the first inlet flange assembly, the exhaust hole of the inlet flange is utilized to guide the exhaust gas from the engine cylinder into the first noise reduction mechanism. The connecting hole ensures the tight connection between the assembly and the engine cylinder to prevent engine exhaust leakage, and the buffer gasket provides a buffering and shock-absorbing effect when the exhaust manifold assembly is connected to the engine cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of an engine exhaust manifold assembly according to an embodiment of the utility model;

[0016] Figure 2 is a structural schematic diagram of an engine exhaust manifold assembly from another angle according to an embodiment of the utility model;

[0017] Figure 3 It is a partial structural schematic diagram of a first noise reduction mechanism in an engine exhaust manifold assembly according to an embodiment of the utility model;

[0018] Figure 4It is a partial structural schematic diagram of another angle of a first noise reduction mechanism in an engine exhaust manifold assembly according to an embodiment of the utility model;

[0019] Figure 5 It is a partial structural schematic diagram of a noise dispersion assembly in an engine exhaust manifold assembly from another angle according to an embodiment of the utility model;

[0020] Figure 6 yes Figure 2 A partial enlarged view of point A in the middle.

[0021] In the figure:

[0022] 1. Outlet flange; 2. Catalyst; 3. Exhaust manifold main pipe; 4. First manifold section; 5. Second manifold section; 6. First manifold branch pipe; 7. First noise reduction mechanism; 701. Vacuum outer pipe; 702. Connecting pipe; 703. Fixing ring; 704. Fixing hole; 705. Mounting hole; 706. Noise reduction inner pipe; 707. Noise reduction sleeve; 708. Noise reduction hole; 709. Noise dispersion assembly; 7091. Circular partition; 7092. Cylindrical diffusion shell; 7093. Diffusion hole; 7094. Circular mounting plate; 7095. Dispersion pipe; 7096. Dispersion hole; 8. First inlet flange assembly; 801. Inlet flange; 802. Exhaust hole; 803. Connecting hole; 804. Buffer gasket; 9. Second manifold branch pipe; 10. Second noise reduction mechanism; 11. Second inlet flange assembly. DETAILED DESCRIPTION

[0023] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] According to an embodiment of the utility model, an engine exhaust manifold assembly is provided.

[0025] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-Figure 6As shown, according to an embodiment of the utility model, the engine exhaust manifold assembly includes an outlet flange 1, a catalyst 2 is arranged at one end of the outlet flange 1, an exhaust manifold main pipe 3 is arranged at one end of the catalyst 2, a first manifold section 4 is arranged at one end of the exhaust manifold main pipe 3, a second manifold section 5 is arranged at one end of the first manifold section 4, a plurality of first manifold branches 6 are arranged at one side of the first manifold section 4, a first noise reduction mechanism 7 is arranged at one end of the first manifold branches 6, a first inlet flange assembly 8 is commonly arranged at one end of the first noise reduction mechanism 7, a plurality of second manifold branches 9 are arranged at one side of the second manifold section 5, a second noise reduction mechanism 10 is arranged at one end of the second manifold branches 9, a second inlet flange assembly 11 is commonly arranged at one end of the second noise reduction mechanism 10, and the first noise reduction mechanism 7 has the same structure as the second noise reduction mechanism 10, and the first inlet flange assembly 8 has the same structure as the second inlet flange assembly 11.

[0026] In addition, it should be noted that the catalyst 2 in this embodiment adopts a three-way catalyst, which is a device used to reduce the emission of harmful gases in the engine exhaust. x ), carbon monoxide (CO) and hydrocarbons (HC) are converted into relatively harmless nitrogen (N2), carbon dioxide (CO2) and water vapor (H2O), thereby causing an oxidation-reduction reaction through the catalysis of the catalyst, effectively reducing harmful substances emitted during engine exhaust. This is a prior art and will not be elaborated here.

[0027] With the aid of the above-mentioned technical scheme of the utility model, the structure of the utility model is scientific and novel. Through the synergistic effect of the first noise reduction mechanism 7 and the second noise reduction mechanism 10, the efficient noise reduction of the exhaust manifold assembly is successfully achieved. The noise dispersion component 709 effectively reduces the noise generated during engine exhaust through fluid dynamics regulation, noise dispersion and absorption, thereby improving the comfort of the engine working environment.

[0028] In one embodiment, for the above-mentioned first noise reduction mechanism 7, the first noise reduction mechanism 7 includes a vacuum outer tube 701 arranged at one end of the first manifold branch pipe 6 (in addition, in specific applications, the two ends of the vacuum outer tube 701 are connected to the fixing ring 703 by bolts), the two ends of the vacuum outer tube 701 are symmetrically provided with connecting tubes 702, one end of the connecting tube 702 is provided with a fixing ring 703, the cross section of the connecting tube 702 is set to a conical structure, the outer side of the fixing ring 703 is provided with a plurality of fixing holes 704, and the two ends of the vacuum outer tube 701 are provided with a plurality of mounting holes 705 matched with the fixing holes 704, the inner side of the vacuum outer tube 701 is provided with a noise reduction inner tube 706 connected to the first manifold branch pipe 6, and the middle outer side of the noise reduction inner tube 706 is sleeved with a noise reduction sleeve 707 The outer side of the noise reduction sleeve 707 penetrates the noise reduction inner tube 706 and is provided with a plurality of noise reduction holes 708 arranged in a circle. A noise dispersion component 709 is arranged in the noise reduction hole 708. The noise dispersion component 709 includes a circular partition 7091 arranged on the inner side of the noise reduction hole 708. A cylindrical diffusion shell 7092 is arranged at the top end of the circular partition 7091. A plurality of diffusion holes 7093 are opened on the outer side of the cylindrical diffusion shell 7092. A circular mounting plate 7094 is arranged at the top end of the cylindrical diffusion shell 7092. A plurality of dispersion pipes 7095 are penetrated at the top end of the circular mounting plate 7094. A plurality of dispersion holes 7096 cooperating with the dispersion pipes 7095 are opened at the top end of the circular partition 7091, thereby reducing the turbulent movement of the exhaust gas flow and dispersing and reducing the propagation of noise.

[0029] In addition, it should be noted that in actual application, cotton-like glass fiber material is filled between the vacuum outer tube 701 and the noise reduction inner tube 706. The glass fiber material has the property of being resistant to high temperatures. By filling it into the internal gap between the vacuum outer tube 701 and the noise reduction inner tube 706, the sound can be eliminated when the exhaust passes through and the exhaust vibration can be reduced. This is a prior art and will not be elaborated here.

[0030] The working principle of the first noise reduction mechanism 7 is as follows: first, the engine cylinder is connected to the first noise reduction mechanism 7 through the first inlet flange assembly 8. When the engine is running and exhausting, the exhausted exhaust gas first passes into the noise reduction inner tube 706 through the inlet flange 801, and then enters the vacuum outer tube 701 from the noise dispersion assembly 709 on the inner side of the noise reduction inner tube 706 and the outer side of the noise reduction sleeve 707. The vacuum outer tube 701 and the connecting tubes 702 at both ends form a cavity structure under the fixation of the fixing ring 703. The cavity is filled with cotton-like glass fiber, which can eliminate the sound when the exhaust passes through and reduce the exhaust vibration. Then the connecting tube 702 at one end of the vacuum outer tube 701 is connected to the first manifold branch pipe 6. After the exhaust gas passes through the vacuum outer tube 701, it is then passed into the first manifold branch pipe 6 after completing the noise reduction, and is mixed with the exhaust gas that has completed the noise reduction of the second manifold branch pipe 9 and then passed into the exhaust manifold main pipe 3.

[0031] When the exhaust gas passes through the noise dispersion component 709 on the outside of the noise reduction sleeve 707, it is first dispersed into the dispersion pipe 7095 through the dispersion hole 7096 on the top of the circular partition 7091, and is dispersed and discharged from the top of the circular mounting plate 7094. The flow of the exhaust gas is guided and dispersed by multiple dispersion pipes 7095, which can make the exhaust gas flow more uniform, reduce the turbulence and pressure pulsation of the air flow, and thus reduce the generation of noise; at the same time, the diffusion holes 7093 opened on the outside of the cylindrical diffusion shell 7092 can effectively disperse and absorb the noise sound waves in the exhaust gas. When the exhaust gas from the noise dispersion component 709 into the vacuum outer tube 701 passes through these diffusion holes 7093, it will be dispersed again by the multiple dispersion pipes 7095, which disturbs the exhaust gas flow. At the same time, the noise energy is dispersed into the surrounding environment, which reduces the propagation of noise in the exhaust manifold assembly, thereby reducing the noise level in the engine exhaust system.

[0032] In one embodiment, for the above-mentioned first inlet flange assembly 8, the first inlet flange assembly 8 includes an inlet flange 801 arranged at one end of the first noise reduction mechanism 7, a plurality of exhaust holes 802 cooperating with the first noise reduction mechanism 7 are opened at one end of the inlet flange 801, a plurality of connecting holes 803 are opened on the outside of the exhaust holes 802, and a buffer gasket 804 is arranged at the bottom end of the inlet flange 801 (in addition, in specific applications, the buffer gasket 804 is connected to the inlet flange 801 by bolts), thereby ensuring the smooth flow of exhaust gas discharged from the engine and ensuring the tight connection of the exhaust manifold assembly.

[0033] The working principle of the first inlet flange assembly 8 is as follows: first, the inlet flange 801 can effectively guide the exhaust gas from the cylinder of the engine into the first noise reduction mechanism 7 through the design of the exhaust hole 802, ensuring that the exhaust gas in the exhaust system flows smoothly through the exhaust manifold to the catalyst. The setting of the connecting hole 803 enables the first inlet flange assembly 8 to be tightly connected to the cylinder of the engine to prevent exhaust gas leakage. The design of the buffer gasket 804 at the bottom end of the inlet flange 801 can provide a certain buffering and shock absorbing effect during connection, which helps to reduce the impact of vibration and impact on the exhaust manifold assembly and extend the service life of the engine.

[0034] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0035] In actual application, one group of cylinders of the engine is connected to the first noise reduction mechanism 7 through the first inlet flange assembly 8 (the working principle of the first inlet flange assembly 8 is as described above), and the other group of cylinders is connected to the second noise reduction mechanism 10 through the second inlet flange assembly 11 (the second inlet flange assembly 11 has the same structure and working principle as the first inlet flange assembly 8). When the engine is running and exhausting, the exhausted exhaust gas first passes through the first inlet flange assembly 8 into the noise reduction inner pipe 706, and then passes through the noise reduction inner pipe 706 and the noise separation. The bulk component 709 enters the vacuum outer tube 701, and the exhaust gas passing through the first noise reduction mechanism 7 is then passed into the first manifold branch pipe 6 after completing the noise reduction (the working principle of the first noise reduction mechanism 7 is as described above). At the same time, the exhaust gas that has completed the noise reduction in the second noise reduction mechanism 10 is passed into the second manifold branch pipe 9 (the second noise reduction mechanism 10 has the same structure and working principle as the first noise reduction mechanism 7), and is mixed with the exhaust gas that has completed the noise reduction in the first manifold branch pipe 6 and then passed into the exhaust manifold main pipe 3, and finally discharged from the outlet flange 1 through the catalyst 2.

[0036] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An engine exhaust manifold assembly, comprising an outlet flange (1), characterized in that: A catalyst (2) is arranged at one end of the outlet flange (1), an exhaust manifold main pipe (3) is arranged at one end of the catalyst (2), a first manifold section (4) is arranged at one end of the exhaust manifold main pipe (3), a second manifold section (5) is arranged at one end of the first manifold section (4), a plurality of first manifold branches (6) are arranged at one side of the first manifold section (4), a first noise reduction mechanism (7) is arranged at one end of each of the first manifold branches (6), and a first inlet flange assembly (8) is commonly arranged at one end of the first noise reduction mechanism (7).

2. An engine exhaust manifold assembly according to claim 1, characterized in that: A plurality of second manifold branches (9) are arranged on one side of the second manifold section (5); a second noise reduction mechanism (10) is arranged at one end of each of the second manifold branches (9); a second inlet flange assembly (11) is arranged at one end of each of the second noise reduction mechanisms (10); the first noise reduction mechanism (7) and the second noise reduction mechanism (10) have the same structure; and the first inlet flange assembly (8) and the second inlet flange assembly (11) have the same structure.

3. An engine exhaust manifold assembly according to claim 2, characterized in that: The first noise reduction mechanism (7) comprises a vacuum outer tube (701) arranged at one end of the first manifold branch tube (6), connecting tubes (702) are symmetrically arranged at both ends of the vacuum outer tube (701), and a fixing ring (703) is arranged at one end of the connecting tube (702).

4. An engine exhaust manifold assembly according to claim 3, characterized in that: The cross section of the connecting tube (702) is configured as a conical structure, a plurality of fixing holes (704) are provided on the outer side of the fixing ring (703), and a plurality of mounting holes (705) matching the fixing holes (704) are provided at both ends of the vacuum outer tube (701).

5. An engine exhaust manifold assembly according to claim 4, characterized in that: A noise reduction inner tube (706) connected to the first manifold branch tube (6) is arranged on the inner side of the vacuum outer tube (701); a noise reduction sleeve (707) is sleeved on the outer side of the middle portion of the noise reduction inner tube (706); a plurality of noise reduction holes (708) arranged in a circumferential pattern are formed on the outer side of the noise reduction sleeve (707) and penetrate through the noise reduction inner tube (706); a noise dispersion component (709) is arranged in the noise reduction hole (708).

6. An engine exhaust manifold assembly according to claim 5, characterized in that: The noise dispersion component (709) includes a circular partition (7091) arranged on the inner side of the noise reduction hole (708), a cylindrical diffusion shell (7092) is arranged on the top of the circular partition (7091), and a plurality of diffusion holes (7093) are opened on the outer side of the cylindrical diffusion shell (7092).

7. An engine exhaust manifold assembly according to claim 6, characterized in that: A circular mounting plate (7094) is disposed at the top of the cylindrical diffusion shell (7092), a plurality of dispersion tubes (7095) are penetrated through the top of the circular mounting plate (7094), and a plurality of dispersion holes (7096) matching with the dispersion tubes (7095) are opened at the top of the circular partition (7091).

8. An engine exhaust manifold assembly according to claim 2, characterized in that: The first inlet flange assembly (8) comprises an inlet flange (801) arranged at one end of the first noise reduction mechanism (7); a plurality of exhaust holes (802) cooperating with the first noise reduction mechanism (7) are provided at one end of the inlet flange (801); a plurality of connecting holes (803) are provided on the outer sides of the exhaust holes (802); and a buffer gasket (804) is provided at the bottom end of the inlet flange (801).

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