A new EGR exhaust pipe assembly for engine

Abstract

The utility model discloses a novel engine with EGR air outlet pipe assembly, including air inlet pipe, air outlet pipe, bellows and hoop structure, bellows both ends are fixedly connected with air inlet pipe and air outlet pipe respectively, bellows both ends are communicated with air inlet pipe and air outlet pipe respectively, the length of air outlet pipe is greater than the length of air inlet pipe, the hoop structure is including support cover, clamp and buckling plate, the support cover is sleeved in the outer wall of air outlet pipe, the support cover is fixedly connected with air outlet pipe, the clamp overall is arc, the clamp is sleeved in the outer wall of support cover, the clamp is fixedly connected with the connecting plate, and the connecting plate is clamped with buckling plate. The utility model has the beneficial effects that: when the EGR air outlet pipe assembly is assembled to the engine, through bellows contraction, the overall length of the EGR air outlet pipe assembly is shortened, and through adjusting the angle of air inlet pipe and air outlet pipe, the feasibility of assembly process is ensured, and the advantage of convenient assembly is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust pipe assemblies, specifically to a novel EGR exhaust pipe assembly for engines. Background Technology

[0002] The EGR exhaust manifold assembly is a steel pipe fixed to the engine, used to connect the engine's EGR valve and intake system. It returns a portion of the exhaust gases to the intake manifold, where they re-enter the cylinders along with the fresh air-fuel mixture. Because the exhaust gases contain a large amount of polyatomic gases such as CO2, which are non-combustible but absorb a significant amount of heat due to their high specific heat capacity, the maximum combustion temperature of the air-fuel mixture in the cylinder is lowered, thus reducing NOx formation.

[0003] Chinese utility model patent CN220929543U discloses an integrated EGR exhaust pipe assembly, relating to automotive engine components. The assembly includes an exhaust pipe, a coolant pipe, and a bracket assembly integrated onto the exhaust pipe. The coolant pipe is integrated onto the exhaust pipe via the bracket assembly. Integrating the coolant pipe onto the EGR exhaust pipe via the bracket assembly eliminates the need for tooling, saving tooling costs, reducing installation steps, and ensuring high consistency. The bracket assembly secures the coolant pipe, preventing it from colliding with other components during vibration, improving the coolant pipe's durability, optimizing engine NVH, and featuring a compact layout that effectively reduces the height of the EGR exhaust pipe.

[0004] The engine compartment of a car is compact, while the EGR exhaust pipe assembly is relatively long. It is prone to getting stuck during the assembly process, making assembly impossible. Therefore, the existing EGR exhaust pipe assembly presents a problem of inconvenient assembly. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a new type of EGR exhaust pipe assembly for engines, which includes an intake pipe, an exhaust pipe, a corrugated pipe and a clamp structure. This new type of EGR exhaust pipe assembly for engines has the advantage of convenient assembly.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A novel EGR exhaust pipe assembly for an engine includes an intake pipe, an exhaust pipe, a corrugated pipe, and a clamp structure. The corrugated pipe is fixedly connected to the intake pipe and the exhaust pipe at both ends, and the two ends of the corrugated pipe communicate with the intake pipe and the exhaust pipe respectively. The length of the exhaust pipe is greater than the length of the intake pipe. The clamp structure includes a support sleeve, a clamp, and a buckle plate. The support sleeve is fitted onto the outer wall of the exhaust pipe and is fixedly connected to the exhaust pipe. The clamp is generally arc-shaped and fitted onto the outer wall of the support sleeve. A connecting plate is fixedly connected to the clamp, and the connecting plate engages with the buckle plate.

[0008] By configuring the EGR exhaust pipe assembly to be installed on the engine, the overall length of the EGR exhaust pipe assembly is shortened by the contraction of the bellows. By adjusting the angle of the intake and exhaust pipes, collisions between the intake and exhaust pipes and other objects in the engine compartment are prevented, thus ensuring the feasibility of the assembly process and achieving the advantage of convenient assembly.

[0009] Preferably, the vent pipe includes a vent connecting section, a bending section, and a connecting section. The bending section is located between the connecting section and the vent end. The connecting section is located at the end of the vent pipe near the corrugated pipe. The support sleeve is disposed on the bending section.

[0010] This setting allows for adjustment of the connection position of the clamp structure.

[0011] Preferably, a snap fastener is fixedly connected to the side edge of the buckle plate, and the snap fastener and the buckle plate are respectively engaged with the two sides of the connecting plate.

[0012] This setup ensures structural stability between the connecting plate and the buckle plate.

[0013] Preferably, the buckle abuts against the connecting plate.

[0014] This design further enhances the stability of the buckle plate and the connecting plate.

[0015] Preferably, the buckle plate is provided with a slot, the slot extends in a direction perpendicular to the support sleeve, and the connecting plate is fixedly connected with a support block that mates with the slot.

[0016] This design further enhances the stability of the buckle plate and the connecting plate.

[0017] Preferably, multiple snap fasteners are provided, and the multiple snap fasteners are respectively located on the two sides of the buckle plate.

[0018] This design further enhances the structural stability of the buckle plate and connecting plate.

[0019] Preferably, the buckle plate is provided with bolt holes.

[0020] This design facilitates the use of bolts to secure the buckle plate to the frame.

[0021] Preferably, the arc radius of the clamp is 210°.

[0022] This design serves to protect the vent pipe.

[0023] Preferably, the vent connection section is fixedly connected to an vent flange.

[0024] This configuration facilitates the connection of the exhaust pipe to the engine intake manifold.

[0025] Preferably, the intake pipe is fixedly connected to an intake flange.

[0026] This configuration facilitates the connection of the intake pipe to the EGR valve.

[0027] Compared with the prior art, this utility model has achieved beneficial technical effects:

[0028] 1. The bellows has multiple folds on its wall. The bellows elongate by unfolding these folds and contract by folding them. Bending the bellows allows one side of the folds to contract while the other side unfolds. Bellows contraction reduces the overall length of the EGR outlet pipe assembly, and bending the bellows adjusts the relative angle between the intake and exhaust pipes. When assembling the EGR outlet pipe assembly onto the engine, bellows contraction shortens the overall length, and adjusting the angle of the intake and exhaust pipes prevents them from colliding with other objects in the engine compartment, ensuring assembly feasibility and facilitating assembly.

[0029] 2. In the process of connecting both ends of the EGR exhaust pipe assembly to the EGR valve and the engine intake manifold respectively, first, fix the fastener plate to the frame in the engine compartment, then install the connecting plate on the fastener plate, and then move the exhaust pipe so that the support sleeve is snapped into the inside of the clamp. The clamp provides support to the support sleeve, realizing the function of the clamp structure to provide support to the exhaust pipe. First, support the exhaust pipe with the clamp structure, hang the EGR exhaust pipe assembly in the engine compartment, and then connect the intake pipe and exhaust pipe to their corresponding positions, which facilitates the assembly of the EGR exhaust pipe assembly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a novel EGR exhaust pipe assembly for an engine according to an embodiment of this utility model;

[0031] Figure 2This is a schematic diagram of the clamp structure in an embodiment of this utility model.

[0032] The technical features referred to by the various reference numerals in the accompanying drawings are as follows:

[0033] 11. Inlet pipe; 12. Corrugated pipe; 13. Outlet pipe; 14. Outlet connection section; 15. Bend section; 16. Connecting section; 17. Outlet flange; 18. Inlet flange; 21. Support sleeve; 22. Clamp; 23. Connecting plate; 24. Buckle plate; 25. Press-fit; 26. Slot; 27. Support block; 28. Bolt hole. Detailed Implementation

[0034] To make the objectives, technical solutions and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments. However, the scope of protection of this utility model is not limited to the specific embodiments described below.

[0035] refer to Figure 1-2 A novel EGR exhaust manifold assembly for an engine includes an intake manifold 11, an exhaust manifold 13, a bellows 12, and a clamping structure. The bellows 12 is fixedly connected at both ends to the intake manifold 11 and the exhaust manifold 13, respectively, and its ends communicate with both ends. The length of the exhaust manifold 13 is greater than the length of the intake manifold 11. The exhaust manifold 13 includes an exhaust connection section 14, a bend section 15, and a connecting section 16. The bend section 15 is located between the connecting section 16 and the exhaust end, and the connecting section 16 is located at the end of the exhaust manifold 13 closest to the bellows 12. The bend section 15 allows adjustment of the clamping structure's connection position, facilitating its connection to both the exhaust manifold 13 and the vehicle frame within the engine compartment. An exhaust flange 17 is fixedly connected to the exhaust connection section 14. The exhaust flange 17 is fixedly installed onto the engine intake manifold, facilitating the connection of the exhaust manifold 13 to the engine intake manifold. The intake pipe 11 is fixedly connected to the intake flange 18. The intake flange is fixedly installed on the EGR valve to facilitate the connection of the intake pipe 11 to the EGR valve.

[0036] The clamp structure includes a support sleeve 21, a clamp 22, and a fastening plate 24. The support sleeve 21 is fitted onto the outer wall of the exhaust pipe 13 and is fixedly connected to the exhaust pipe 13. The support sleeve 21 is positioned on the bent section 15. The clamp 22 is arc-shaped and fitted onto the outer wall of the support sleeve 21. A connecting plate 23 is fixedly connected to the clamp 22, and the connecting plate 23 engages with the fastening plate 24. The fastening plate 24 is fixedly mounted on the frame in the engine compartment. A snap fastener 25 is fixedly connected to the side edge of the fastening plate 24, and the snap fastener 25 and the fastening plate 24 engage with the two sides of the connecting plate 23, respectively. The snap fastener 25 presses down on the connecting plate 23, maintaining structural stability between the connecting plate 23 and the fastening plate 24. The snap fastener 25 abuts against the connecting plate 23. The snap fastener 25 abuts against the connecting plate 23, making the connecting plate 23 and the buckle plate 24 fit tightly. The friction between the connecting plate 23, the snap fastener 25, and the buckle plate 24 prevents slippage on the buckle plate 24, further improving the stability of the buckle plate 24 and the connecting plate 23. The buckle plate 24 has a slot 26 extending perpendicular to the support sleeve 21. The connecting plate 23 is fixedly connected to a support block 27 that mates with the slot 26. The support block 27 engages with the slot 26, allowing the buckle plate 24 to provide support to the connecting plate 23, further improving the stability of the buckle plate 24 and the connecting plate 23. Multiple snap fasteners 25 are provided, located on both sides of the buckle plate 24. The multiple snap fasteners 25 simultaneously press against the connecting plate 23, further improving the structural stability of the buckle plate 24 and the connecting plate 23. The buckle plate 24 has bolt holes 28, facilitating the use of bolts to fix the buckle plate 24 to the frame. The arc radius of clamp 22 is 210°. This ensures that during the insertion of support sleeve 21 into clamp 22, support sleeve 21 can push clamp 22 to undergo elastic deformation and be squeezed into clamp 22. Furthermore, because the arc radius is greater than 180°, clamp 22 can hold support sleeve 21 after it is inserted, preventing support sleeve 21 from accidentally slipping out. By providing support sleeve 21 on the vent pipe 13, it prevents the vent pipe 13 from being squeezed and deformed when inserted into clamp 22, thus protecting the vent pipe 13.

[0037] The intake pipe 11 is connected to the EGR valve, and the exhaust connection section 14 is connected to the engine intake manifold. This allows some of the exhaust gas discharged from the engine to be returned to the intake manifold through the EGR valve, thereby reducing the maximum combustion temperature of the air-fuel mixture in the cylinder and reducing the amount of NOx generated.

[0038] This embodiment has the following advantages:

[0039] The bellows 12 has multiple pleats on its wall. The bellows 12 elongates by unfolding these pleats and contracts by folding them. Bending the bellows 12 allows it to bend by contracting one side of the pleats and unfolding the other. Contracting the bellows 12 reduces the overall length of the EGR outlet pipe assembly, and bending it adjusts the relative angle between the intake pipe 11 and the outlet pipe 13. When assembling the EGR outlet pipe assembly onto the engine, the contraction of the bellows 12 shortens the overall length of the assembly, and adjusting the angle between the intake pipe 11 and the outlet pipe 13 prevents them from colliding with other objects in the engine compartment, thus ensuring the feasibility of the assembly process and achieving the advantage of convenient assembly.

[0040] In the process of connecting the two ends of the EGR exhaust pipe assembly to the EGR valve and the engine intake manifold respectively, the buckle plate 24 is first fixedly installed on the frame in the engine compartment. Then, the connecting plate 23 is installed on the buckle plate 24. Next, the exhaust pipe 13 is moved so that the support sleeve 21 is snapped into the inside of the clamp 22. The clamp 22 provides support to the support sleeve 21, realizing the function of the clamp structure to provide support to the exhaust pipe 13. The exhaust pipe 13 is first supported by the clamp structure, and the EGR exhaust pipe assembly is hung in the engine compartment. Then, the intake pipe 11 and the exhaust pipe 13 are connected to their corresponding positions, which facilitates the assembly of the EGR exhaust pipe assembly.

[0041] The length of the exhaust pipe 13 is greater than the length of the intake pipe 11, which enables the clamp structure to effectively support the heavier exhaust pipe 13, thereby facilitating the connection of the lighter intake pipe 11 to the EGR valve and making assembly easier.

[0042] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the utility model.

Claims

1. A novel EGR exhaust manifold assembly for an engine, characterized in that: The device includes an intake pipe (11), an exhaust pipe (13), a corrugated pipe (12), and a clamp structure. The two ends of the corrugated pipe (12) are fixedly connected to the intake pipe (11) and the exhaust pipe (13), respectively. The two ends of the corrugated pipe (12) are connected to the intake pipe (11) and the exhaust pipe (13), respectively. The length of the exhaust pipe (13) is greater than the length of the intake pipe (11). The clamp structure includes a support sleeve (21), a clamp (22), and a buckle plate (24). The support sleeve (21) is fitted on the outer wall of the exhaust pipe (13) and is fixedly connected to the exhaust pipe (13). The clamp (22) is arc-shaped and is fitted on the outer wall of the support sleeve (21). The clamp (22) is fixedly connected to a connecting plate (23), and the connecting plate (23) is engaged with the buckle plate (24). A snap fastener (25) is fixedly connected to the side edge of the buckle plate (24), and the snap fastener (25) and the buckle plate (24) are respectively snapped into the two sides of the connecting plate (23); The snap fastener (25) abuts against the connecting plate (23); The buckle plate (24) is provided with a slot (26), the slot (26) extends in a direction perpendicular to the support sleeve (21), and the connecting plate (23) is fixedly connected with a support block (27) that cooperates with the slot (26).

2. The novel EGR exhaust manifold assembly for an engine according to claim 1, characterized in that: The vent pipe (13) includes a vent connecting section (14), a bend section (15) and a connecting section (16). The bend section (15) is located between the connecting section (16) and the vent end. The connecting section (16) is located at one end of the vent pipe (13) near the corrugated pipe (12). The support sleeve (21) is disposed on the bend section (15).

3. The novel EGR exhaust manifold assembly for an engine according to claim 1, characterized in that: Multiple snap fasteners (25) are provided, and the multiple snap fasteners (25) are located on the two sides of the buckle plate (24).

4. The novel EGR exhaust manifold assembly for an engine according to claim 1, characterized in that: The buckle plate (24) is provided with bolt holes (28).

5. The novel EGR exhaust manifold assembly for an engine according to claim 1, characterized in that: The arc radius of the clamp (22) is 210°.

6. The novel EGR exhaust manifold assembly for an engine according to claim 2, characterized in that: The vent connection section (14) is fixedly connected to the vent flange (17).

7. The novel EGR exhaust manifold assembly for an engine according to claim 1, characterized in that: The intake pipe (11) is fixedly connected to the intake flange (18).

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