Gasoline engine exhaust aftertreatment structure

Abstract

The utility model belongs to an exhaust aftertreatment structure of a gasoline engine in the technical field of automobile exhaust systems. Comprising an air inlet flange (1), an end cone assembly (2) and a hoop (3), the end cone assembly (2) comprises an end cone body (4) and an end cone sealing part (5), the end cone sealing part (5) is provided with a convex end cone sealing convex part (6), one end of the air inlet flange (1) is provided with a convex flange sealing convex part (7), and the hoop (3) is connected with the end cone sealing convex part (6) of the end cone sealing part (5) and the flange sealing convex part (7) of the air inlet flange (1). The gasoline engine exhaust aftertreatment structure is simple in structure, effectively improves sealing performance and reliability, and is convenient to disassemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile exhaust systems, and more specifically, it relates to an exhaust post-treatment structure for gasoline engines. Background Art

[0002] The post-treatment sealing structure is to ensure reliable sealed connection under various working conditions and ensure the normal operation of the engine, and it is a key component. The sealing structures in the prior art, such as the invention patent document with the application number 201910864134.0, the authorization announcement number CN110439660 A, and the name "A Cylindrical Post-treatment Sealing Structure" disclose a sealing structure: it includes a front cylinder body, a rear cylinder body, and a locking assembly, with a simple and compact structure and fewer components, but there are problems such as high process requirements and poor sealing performance. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is: aiming at the deficiencies of the prior art, to provide an exhaust post-treatment structure for gasoline engines with a simple structure, effectively improving sealing performance and reliability.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the utility model is as follows:

[0005] The utility model is an exhaust post-treatment structure for gasoline engines, including an intake flange, an end cone assembly, and a clamp. The end cone assembly includes an end cone body and an end cone sealing part. The end cone sealing part is provided with an outwardly convex end cone sealing convex part. One end of the intake flange is provided with an outwardly convex flange sealing convex part. The clamp connects the end cone sealing convex part of the end cone sealing part and the flange sealing convex part of the intake flange.

[0006] The described clamp includes a clamp body. One end of the outer side of the clamp body is movably connected with a clamping screw, and a fastening nut is screwed on the clamping screw. The other end of the clamp body is provided with a clamping notch.

[0007] The other end of the intake flange is fixedly connected to the engine exhaust pipe.

[0008] The end cone sealing part is a flared structure, and the end cone sealing part and the end cone body are an integral structure.

[0009] The cross-section of the end cone sealing convex part is a convex arc surface structure, the cross-section of the flange sealing convex part is a convex arc surface structure, and the cross-section of the clamp body is a convex arc surface structure.

[0010] The cross-section of the end cone sealing convex part is a fan-shaped structure, the cross-section of the flange sealing convex part is a fan-shaped structure, and the cross-section of the clamp body is a convex arc surface structure.

[0011] The end cone assembly is connected to the chamber inlet of the transfer chamber. A heat management mechanism is arranged in the transfer chamber, and the transfer chamber also includes a chamber outlet.

[0012] When the clamp connects the end cone sealing convex portion of the end cone sealing part and the flange sealing convex portion of the intake flange, as the clamp is tightened, the end cone sealing convex portion and the flange sealing convex portion are configured to be deformable to form a sealing surface.

[0013] The technical solution of this utility model is adopted, and the working principle and beneficial effects are as follows:

[0014] The gasoline engine exhaust after-treatment structure described in the present invention is separately manufactured with an intake flange, an end cone assembly, and a clamp. When the structure is connected, the intake flange is connected to the engine outlet pipe to ensure that the exhaust gas reliably enters the after-treatment structure. The end cone body and the end cone sealing portion of the cone end assembly are an integrally formed structure. The end cone sealing convex portion is obtained by secondary processing after the end cone body is formed, and no welding is required. When the intake flange and the end cone assembly are connected, they are connected through a clamp. The principle of the formation of the sealing surface: when the flange sealing convex portion of the intake flange and the end cone sealing convex portion of the cone end body are connected together with a clamp, as the clamp is continuously tightened and torque is loaded, the end cone sealing convex portion is deformed due to the force, and a sealing surface is formed between the end cone and the intake flange, thereby achieving a reliable sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following is a brief description of the contents and symbols in the drawings of this specification:

[0016] Figure 1 This is a schematic structural diagram of the gasoline engine exhaust after-treatment structure of the present utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of the gasoline engine exhaust after-treatment structure of the present utility model;

[0018] Figure 3 This is a schematic structural diagram of the clamp of the gasoline engine exhaust after-treatment structure of the present utility model;

[0019] Figure 4 This is a schematic cross-sectional view of the gasoline engine exhaust after-treatment structure of the present utility model;

[0020] The marks in the accompanying drawings are: 1. Inlet flange; 2. End cone assembly; 3. Clamp; 4. End cone body; 5. End cone sealing part; 6. End cone sealing convex part; 7. Flange sealing convex part; 8. Clamp body; 9. Clamping screw; 10. Fastening nut; 11. Clamping notch; 12. Engine exhaust pipe; 13. Transfer chamber. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present utility model, including the shapes, structures, mutual positions and connection relationships between various parts, the functions and working principles of various parts, etc., with reference to the accompanying drawings and through the description of embodiments:

[0022] As shown in the attached Figure 1 - attached Figure 4 figures, the present utility model is a gasoline engine exhaust aftertreatment structure, which includes an intake flange 1, an end cone assembly 2, and a clamp 3. The end cone assembly 2 includes an end cone body 4 and an end cone sealing portion 5. The end cone sealing portion 5 is provided with an outwardly convex end cone sealing convex portion 6. One end of the intake flange 1 is provided with an outwardly convex flange sealing convex portion 7. The clamp 3 connects the end cone sealing convex portion 6 of the end cone sealing portion 5 and the flange sealing convex portion 7 of the intake flange 1. For the deficiencies in the prior art, the above structure proposes an improved technical solution. When setting up the structure, the intake flange 1, the end cone assembly 2, and the clamp 3 are respectively manufactured. When connecting the structures, the intake flange 1 is connected to the engine outlet pipe to ensure that the exhaust gas can reliably enter the aftertreatment structure. The end cone body 4 and the end cone sealing portion 5 of the end cone assembly are an integrally formed structure. The end cone sealing convex portion 6 is obtained by secondary processing after the end cone body is formed and does not require welding. When connecting the intake flange and the end cone body, they are connected by a clamp. The principle of forming the sealing surface: when the flange sealing convex portion 7 of the intake flange and the end cone sealing convex portion 6 of the end cone assembly are connected together by a clamp, as the clamp is continuously tightened and the torque is continuously loaded, the end cone sealing convex portion 6 will be deformed due to the force and form a sealing surface with the intake flange, thereby achieving a reliable sealing effect. The gasoline engine exhaust aftertreatment structure described in the present utility model has a simple structure, effectively improves the sealing performance and reliability, and is convenient for disassembly.

[0023] The clamp 3 includes a clamp body 8. One end of the clamp body 8 is movably connected to a clamping screw 9 on the outside, and a fastening nut 10 is screwed on the clamping screw 9. The other end of the clamp body 8 is provided with a clamping notch 11. For the above structure, the clamping screw is clamped in the clamping notch, and then the fastening nut is rotated in one direction to tighten the clamp body, and the fastening nut is rotated in the other direction to loosen the clamp body, which is convenient for adjustment and reliable in fastening.

[0024] The other end of the intake flange 1 is fixedly connected to an engine exhaust pipe 12. The end cone assembly 2 is connected to the chamber inlet of a transfer chamber 13. A heat management mechanism is provided in the transfer chamber 13, and the transfer chamber 13 further includes a chamber outlet. For the above structure, the gas discharged from the engine enters the intake flange, enters the transfer chamber, is processed by the heat management mechanism, and then discharged from the transfer chamber.

[0025] The end cone sealing portion 5 is a flared structure, and the end cone sealing portion 5 and the end cone body 4 are an integral structure. For the above structure, the end cone assembly is integrally processed, and the process is simple.

[0026] The cross-section of the end cone sealing protrusion 6 is a convex arc-shaped structure, the cross-section of the flange sealing protrusion 7 is a convex arc-shaped structure, and the cross-section of the clamp body 8 is a convex arc-shaped structure. This structure separately sets the cross-sectional shapes of the end cone sealing protrusion 6, the flange sealing protrusion 7, and the clamp body 8. This ensures that when the clamp applies force, the end cone sealing protrusion 6 is deformed by the force, forming a reliable sealing surface with the flange sealing protrusion 7, effectively ensuring the pipeline seal.

[0027] The end cone sealing protrusion 6 has a fan-shaped cross-section, the flange sealing protrusion 7 has a fan-shaped cross-section, and the clamp body 8 has a convex arc-shaped cross-section. This structure, with the cross-sectional shapes of the end cone sealing protrusion 6, flange sealing protrusion 7, and clamp body 8 individually configured, ensures that when force is applied to the clamp, the end cone sealing protrusion 6 deforms under force, forming a reliable sealing surface with the flange sealing protrusion 7, effectively ensuring pipeline sealing and preventing gas leakage.

[0028] When the clamp 3 connects the end cone sealing protrusion 6 of the end cone sealing portion 5 and the flange sealing protrusion 7 of the intake flange 1, as the clamp 3 is tightened, the end cone sealing protrusion 6 and the flange sealing protrusion 7 are configured to deform to form a sealing surface. This structure ensures that when force is applied by the clamp, the end cone sealing protrusion 6 is deformed, forming a reliable sealing surface with the flange sealing protrusion 7, effectively ensuring the pipeline seal and preventing gas leakage.

[0029] The gasoline engine exhaust after-treatment structure described in the present invention is configured such that an intake flange 1, an end cone assembly 2, and a clamp 3 are separately manufactured during structural setting. When the structure is connected, the intake flange 1 is connected to the engine outlet pipe to ensure that the exhaust gas reliably enters the after-treatment structure. The end cone body 4 and the end cone sealing portion 5 of the cone end assembly are integrally formed structures. The end cone sealing convex portion 6 is obtained by secondary processing after the end cone body is formed, and no welding is required. When the intake flange 1 and the end cone connection assembly 2 are connected, they are connected via the clamp 3. The principle of the formation of the sealing surface after connection: when the flange sealing convex portion 7 of the intake flange 1 and the end cone sealing convex portion 6 of the cone end body are connected together with a clamp, as the clamp 7 is continuously tightened and the torque is continuously loaded, the end cone sealing convex portion 6 will be deformed due to the force, forming a sealing surface between the end cone sealing convex portion 6 and the intake flange 1, thereby achieving a reliable sealing effect.

[0030] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. An exhaust after-treatment structure for a gasoline engine, characterized in that: It includes an intake flange (1), a end cone assembly (2), and a clamp (3). The end cone assembly (2) includes an end cone body (4) and an end cone sealing portion (5). The end cone sealing portion (5) is provided with an outwardly convex end cone sealing convex portion (6). One end of the intake flange (1) is provided with an outwardly convex flange sealing convex portion (7). The clamp (3) connects the end cone sealing convex portion (6) of the end cone sealing portion (5) and the flange sealing convex portion (7) of the intake flange (1). The clamp (3) includes a clamp body (8). One end outside of the clamp body (8) is movably connected with a clamping screw (9), and a fastening nut (10) is screwed on the clamping screw (9). The other end of the clamp body (8) is provided with a clamping notch (11). The cross-section of the end cone sealing convex portion (6) is a convex arc surface structure, the cross-section of the flange sealing convex portion (7) is a convex arc surface structure, and the cross-section of the clamp body (8) is a convex arc surface structure. When the clamp (3) connects the end cone sealing convex portion (6) of the end cone sealing portion (5) and the flange sealing convex portion (7) of the intake flange (1), as the clamp (3) is tightened, the end cone sealing convex portion (6) and the flange sealing convex portion (7) are configured to be able to deform to form a sealing surface structure.

2. The gasoline engine exhaust aftertreatment structure according to claim 1, characterized in that: The other end of the intake flange (1) is fixedly connected to the engine exhaust pipe (12).

3. The gasoline engine exhaust aftertreatment structure according to claim 1 or 2, characterized in that: The end cone sealing portion (5) is a flared structure, and the end cone sealing portion (5) and the end cone body (4) are an integral structure.

4. The gasoline engine exhaust after-treatment structure according to claim 1 or 2, characterized in that: Alternatively, the cross-section of the end cone sealing convex portion (6) is a fan-shaped structure, and the cross-section of the flange sealing convex portion (7) is a fan-shaped structure.

5. The gasoline engine exhaust aftertreatment structure according to claim 1 or 2, characterized in that: The end cone assembly (2) is connected to the chamber inlet of the transfer chamber (13). A thermal management mechanism is provided in the transfer chamber (13), and the transfer chamber (13) further includes a chamber outlet.

Images