Elliptical post-processing structure and engine

Abstract

The utility model discloses an oval post-processing structure, including DPF, DOC, first shell and stand bar, said DOC and said DPF are both oval structure, coaxial installation, and DOC and DPF both are connected and fixed through bolt, the rear end of said DOC is equipped with air inlet, the front end of DOC is equipped with first flange face joint DPF, the rear end of DPF is equipped with second flange face butt joint with DOC first flange face, and the second flange face is equipped with second flange face butt joint with DOC second flange face butt joint. An air outlet is formed in the rear end of the DPF; the air outlet is connected with a pipeline, and the other end of the pipeline is connected with the rear end of the first shell; a mixer and an SCR (Selective Catalytic Reduction) are arranged in the first shell; an exhaust port is further formed in the front end of the first shell; the upper portions of the supporting feet are fixed to the first flange face or the second flange face through bolts. The DOC and DPF connecting device has the advantages of being compact in structure, small in occupied space, stable in DOC and DPF connection and the like.

Description

Technical Field

[0001] This utility model relates to the field of post-processor technology, and in particular to an elliptical post-processor structure and engine. Background Technology

[0002] With increasing public concern about environmental pollution, efforts to protect the environment are also intensifying. Motor vehicle exhaust emissions are a major pollutant in the atmosphere, leading to the adoption of various methods to eliminate harmful substances in exhaust fumes. The main pollutants emitted by motor vehicle exhaust that cause environmental harm are CO, HC, NOx, and PM (particulate matter). Currently, the main methods used include DOC (diesel oxidation catalyst), SCR (selective reduction catalyst), and DPF (diesel particulate filter).

[0003] Currently, DPFs and DOCs commonly adopt a circular structure. This structure occupies a lot of space, and it is quite difficult to install circular DPFs and DOCs when the installation space is relatively limited.

[0004] Existing technologies disclose some installation methods for elliptical DOC and DPF, such as the exhaust aftertreatment module disclosed in US Patent Document US9556781B2, which installs two sets of aftertreatment systems on a mounting bracket on top of the internal combustion engine.

[0005] For example, patent document CN204572135U discloses a light engine exhaust treatment device, which is mainly designed for light vehicles with limited external engine assembly space. It is designed according to the spatial location of this type of vehicle and can meet the assembly requirements.

[0006] For example, patent document CN114320536A discloses a compact automotive engine exhaust aftertreatment assembly, which uses detachable clamps to connect the oxidation catalytic converter (DOC) to the particulate filter (DPF), the particulate filter (DPF) to the mixer, and the mixer to the selective catalytic reduction converter (SCR). The structure disclosed in patent document CN114320536A is relatively long, making it difficult to arrange, and the stability and vibration resistance of the connections between the DOC, DPF, mixer, and SCR are insufficient when fixed.

[0007] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0008] The main purpose of this utility model is to propose an elliptical aftertreatment structure and engine that is compact, occupies little space, and has a stable connection between DOC and DPF.

[0009] Therefore, this utility model proposes an elliptical aftertreatment structure and an engine.

[0010] Preferably, the present invention may also have the following technical features:

[0011] An elliptical aftertreatment structure includes a DPF, a DOC, a first housing, and support legs. Both the DOC and DPF are elliptical structures, coaxially mounted, and fixed together by bolts. The DOC has an air inlet at its rear end and a first flange face at its front end that engages with the DPF. The DPF has a second flange face at its rear end that mates with the first flange face of the DOC, and an air outlet at its rear end. The air outlet is connected to a pipeline, the other end of which is connected to the rear end of the first housing. The first housing contains a mixer and an SCR, and its front end also has an exhaust port. The upper part of the support legs is fixed to either the first or second flange face by bolts.

[0012] Furthermore, the first flange face and the second flange face are respectively provided with a plurality of connection holes that are correspondingly positioned and distributed in a circular pattern.

[0013] Furthermore, the support leg is provided with mounting holes corresponding to the position and connection hole.

[0014] Furthermore, the support leg has an L-shaped or ⊥-shaped structure, with a concave surface on its upper part that matches the DOC, so that the lower part of the DOC or DPF is engaged in the concave surface.

[0015] Furthermore, it also includes an end cap, the front end of which is provided with a third flange face, the rear end of which is provided with a fourth flange face that mates with the third flange face, and the front end is provided with the air outlet.

[0016] An engine comprising the aforementioned elliptical aftertreatment structure.

[0017] Furthermore, a horizontal plate is installed at the rear end of the engine, one side of which is fixed to the rear end of the engine by bolts and is located above the flywheel housing; the lower part of the support leg is connected to the horizontal plate by bolts.

[0018] Furthermore, it also includes a mounting bracket, the lower part of which is fixed to the cylinder head by bolts, and the upper part of which is fitted with the first housing.

[0019] Furthermore, the first housing is fixed to the mounting bracket by a clamp.

[0020] Furthermore, the first housing is arranged laterally, meaning that the two ends of the first body are close to the intake side and exhaust side of the engine, respectively.

[0021] The advantages of this invention compared to existing technologies include: using bolts for fixing both the DOC and DPF simultaneously to fix the support legs improves integration, and the support leg structure further enhances installation stability. Connecting and fixing the DOC and DPF via bolts passing through connecting holes and nuts allows for a detachable connection between the DOC and DPF. The connection method using flange faces with bolts and nuts provides stronger stability and significantly improves vibration resistance compared to clamp connections. Attached Figure Description

[0022] Figure 1 This is a first-view perspective perspective view of the post-processing structure of this utility model.

[0023] Figure 2 This is a perspective view of the post-processing structure of this utility model.

[0024] Figure 3 This is a side view of the present invention.

[0025] Figure 4 This is a first-person perspective perspective view of the engine of this utility model.

[0026] Figure 5 This is a second-view perspective perspective view of the engine of this utility model.

[0027] Figure 6 This is a third-view perspective view of the engine of this utility model. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0029] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0030] like Figures 1-3The diagram shows an elliptical aftertreatment structure, including a DPF4, a DOC2, a first housing 7, and support legs 8. Both the DOC2 and DPF4 are elliptical structures, coaxially mounted, and fixed together by bolts. The DOC2 has an air inlet 12 at its rear end and a first flange 3 at its front end that engages with the DPF4. The DPF4 has a second flange at its rear end that aligns with the first flange 3 of the DOC2, and an air outlet 11 at its rear end. The air outlet 11 is connected to a pipe 13, the other end of which is connected to the rear end of the first housing 7. The first housing 7 houses a mixer and an SCR, and its front end also has an exhaust port 14. The upper part of the support legs 8 is fixed to either the first flange 3 or the second flange 3 by bolts.

[0031] Preferably, the first flange face 3 and the second flange face each have a plurality of corresponding and circumferentially distributed connecting holes. DOC2 and DPF4 are connected and fixed by bolts passing through the connecting holes and engaging nuts, achieving a detachable connection between DOC2 and DPF4. The connection method using flange faces with bolts and nuts provides stronger stability and significantly improves vibration resistance compared to clamp connections. Furthermore, the support leg 8 has mounting holes corresponding to the connecting holes, meaning that the bolts used to fix DOC2 and DPF4 can also be used to fix the support leg 8, improving integration. Preferably, the support leg 8 has an L-shaped or ⊥-shaped structure, with a concave surface on its upper part that matches DOC2, allowing the lower part of DOC2 or DPF4 to be engaged in the concave surface. This improves the connection strength between the support leg 8 and DOC2.

[0032] To further improve the installation stability of DOC2 and DPF4, the front end of DPF4 is provided with a third flange face 5, and an end cap 10 is also provided. The rear end of the end cap 10 is provided with a fourth flange face that mates with the third flange face 5, and the front end is provided with the air outlet. Thus, a support leg 8 is installed on the third flange face 5, and the front and rear ends of the first part of the after-processor composed of DOC2 and DPF4 are supported by the two support legs 8, resulting in a stable and reliable installation. The first housing 7 serves as the second part of the after-processor.

[0033] Combined Figures 4-6An engine with an elliptical aftertreatment structure is shown. A horizontal plate 15 is mounted at the rear end of the engine 1. One side of the horizontal plate 15 is bolted to the rear end of the engine 1 and is located above the flywheel housing 16. The lower part of the support leg 8 is bolted to the horizontal plate 15, so that the first aftertreatment unit is fixed directly above the flywheel housing 16. A mounting bracket 8 is also included, the lower part of which is bolted to the cylinder head. Specifically, the mounting bracket 8 has an n-shaped structure, its lower part is threaded to the cylinder head, and the upper part is fitted with the first housing 7. When installing the first housing 7, a clamp 71 is used to fix the first housing 7 to the mounting bracket 8.

[0034] Specifically, the first component of the after-processor is arranged laterally, with its two ends close to the intake and exhaust sides of the engine 1, respectively. In a preferred arrangement, the first and second components are arranged parallel to each other, or tend to be parallel.

[0035] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0036] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. An elliptical post-processing structure, comprising a DPF, a DOC, a first housing, and legs, wherein both the DOC and the DPF are elliptical structures, coaxially mounted, and the DOC and DPF are fixed together by bolts, characterized in that, The DOC has an air inlet at its rear end and a first flange face that engages with the DPF at its front end. The DPF has a second flange face that engages with the first flange face of the DOC at its rear end and an air outlet at its rear end. The air outlet is connected to a pipeline, and the other end of the pipeline is connected to the rear end of the first housing. The first housing contains a mixer and an SCR, and the front end of the first housing also has an exhaust port. The upper part of the support leg is fixed to the first flange face or the second flange face by bolts.

2. The elliptical post-processing structure as described in claim 1, characterized in that, The first flange face and the second flange face each have a number of connection holes that are correspondingly positioned and distributed in a circular pattern.

3. The elliptical post-processing structure as described in claim 1, characterized in that, The support leg has assembly holes corresponding to the position and connection hole.

4. The elliptical post-processing structure as described in claim 1, characterized in that, The support leg has an L-shaped or ⊥-shaped structure, and its upper part has a concave surface that matches the DOC, so that the lower part of the DOC or DPF is locked in the concave surface.

5. The elliptical post-processing structure as described in claim 1, characterized in that, It also includes an end cap, the front end of the DPF is provided with a third flange face, the rear end of the end cap is provided with a fourth flange face that mates with the third flange face, and the front end is provided with the air outlet.

6. An engine, characterized in that, Includes the elliptical post-processing structure as described in claim 1.

7. The engine as claimed in claim 6, characterized in that, A horizontal plate is installed at the rear end of the engine. One side of the horizontal plate is fixed to the rear end of the engine by bolts and is located above the flywheel housing. The lower part of the support leg is connected to the horizontal plate by bolts.

8. The engine as claimed in claim 6, characterized in that, It also includes a mounting bracket, the lower part of which is fixed to the cylinder head by bolts, and the upper part of which is fitted with the first housing.

9. The engine as claimed in claim 8, characterized in that, The first housing is fixed to the mounting bracket by a clamp.

10. The engine as claimed in claim 6, characterized in that, The first housing is arranged laterally, meaning that the two ends of the first object are close to the intake side and exhaust side of the engine, respectively.

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