Exhaust catalytic device
By using the concave and convex sections of the conical component in the exhaust catalytic converter, the problem of uneven temperature distribution is solved, achieving uniform exhaust flow and efficient purification, thus improving the purification performance and durability of the exhaust catalytic converter.
Patent Information
- Application Number
- CN202520137080.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In existing exhaust catalytic converters, exhaust gas tends to flow towards the rear of the catalyst, resulting in uneven temperature distribution, which reduces exhaust purification performance and durability.
The design employs a tapered component, including a contraction section and an expansion section. The contraction section rectifies the exhaust gas, while the expansion section guides the exhaust gas evenly to the catalyst box, ensuring uniform catalyst temperature distribution.
This achieves uniform exhaust flow and improves the uniformity of catalyst temperature distribution, thereby enhancing exhaust purification performance and device durability.
Smart Images
Figure CN223647901U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an exhaust catalytic converter, and more particularly to an exhaust catalytic converter suitable for installation on the engine block. Background Technology
[0002] Since then, efforts have continued to mitigate climate change or reduce its impacts, and research and development related to improving emissions are ongoing to achieve these goals. In existing technology, exhaust gas catalytic converters can be installed at the exhaust outlet of engines such as internal combustion engines in vehicles. These converters, connected to the exhaust manifold via a catalytic converter, purify pollutants in the exhaust gases emitted from the engine through the exhaust manifold, and the purified gases are then discharged through an external exhaust pipe. However, exhaust gases from the engine tend to flow towards the rear of the catalytic converter, leading to uneven temperature distribution of the catalyst and reducing the exhaust purification performance and durability of the exhaust gas catalytic converter. Therefore, it is necessary to improve the exhaust gas catalytic converter to overcome these problems. Utility Model Content
[0003] This utility model relates to an exhaust catalytic converter, which has good exhaust purification performance and durability.
[0004] According to an embodiment of the present invention, the exhaust catalytic converter includes: a catalyst box containing a catalyst; and a conical member having a flange at one end and being connected to the engine body via the flange, the other end of the conical member being connected to the catalyst box, the conical member guiding the exhaust flow at a right angle, the conical member having a contraction portion and an expansion portion, the contraction portion being located upstream of the exhaust flow and reducing the volume of the conical member, and the expansion portion being located downstream of the exhaust flow and increasing the volume of the conical member.
[0005] In an embodiment of the present invention, the exhaust catalytic converter further includes an exhaust sensor mounting boss, which is disposed on the conical member and located between the contraction portion and the expansion portion.
[0006] In an embodiment of the present invention, the tapered member comprises two parts joined together, one of which has the flange, and the other of which has the contraction portion and the expansion portion.
[0007] In an embodiment of the present invention, the exhaust catalytic converter further includes an exhaust sensor mounting boss located between the contraction portion and the expansion portion.
[0008] In an embodiment according to the present invention, the expansion portion has a flat surface and protrudes along the flow direction of the exhaust flow.
[0009] Based on the above, in the exhaust catalytic converter of this invention, the conical component rectifies the exhaust gas from the engine block through its contraction section and guides the exhaust gas evenly to the catalyst box through its expansion section. Accordingly, the exhaust gas can flow evenly to the catalyst box, ensuring a uniform temperature distribution of the catalyst, thus efficiently purifying the exhaust gas through the catalyst and preventing localized degradation due to uneven temperature. Therefore, the exhaust catalytic converter of this invention possesses excellent exhaust gas purification performance and durability. Attached Figure Description
[0010] Figure 1 This is a perspective view of an exhaust catalytic converter according to an embodiment of the present invention;
[0011] Figure 2 yes Figure 1 A partial cross-sectional view of the exhaust catalytic converter;
[0012] Figure 3 yes Figure 1 A partial front view of the exhaust catalytic converter;
[0013] Figure 4 yes Figure 1 A partial top view of the exhaust catalytic converter;
[0014] Figure 5 yes Figure 2 A schematic diagram of a conical component guiding the exhaust flow.
[0015] Explanation of icon numbers
[0016] 50: Engine body;
[0017] 50A: Cylinder head;
[0018] 50B: Cylinder block;
[0019] 100: Exhaust catalytic converter;
[0020] 110: Catalytic converter;
[0021] 110a: Inlet end face;
[0022] 110b: Outlet end face;
[0023] 120: Exhaust pipe;
[0024] 130: Supporting component;
[0025] 140: Exhaust manifold;
[0026] 1401: Shrinkage section;
[0027] 1402: Expansion section;
[0028] 142a, 152a: Upstream end;
[0029] 142b, 152b: Downstream end;
[0030] 144: Flange;
[0031] 150: Exhaust connection pipe;
[0032] 160: Gas sensor mounting boss;
[0033] C: Axis;
[0034] D1: Horizontal direction;
[0035] D2: Vertical direction;
[0036] D3: Flow direction;
[0037] F: Exhaust flow;
[0038] P1, P2: Parts;
[0039] S: Flat surface;
[0040] X, Y, Z: Axial axes. Detailed Implementation
[0041] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same component reference numerals are used in the drawings and description to denote the same or similar parts.
[0042] Figure 1 This is a perspective view of an exhaust catalytic converter according to an embodiment of the present invention, showing the axes X, Y, and Z. Please refer to... Figure 1 The exhaust catalytic converter 100 of this embodiment includes a catalytic converter 110, an exhaust pipe 120, and a support member 130. The catalytic converter 110 is vertically arranged in the vertical direction (axial Z) and connected to the engine body 50. The exhaust pipe 120 is integrally disposed on the downstream side of the catalytic converter 110. The support member 130 connects the engine body 50 and the exhaust pipe 120 for support.
[0043] Specifically, in this embodiment, as Figure 1As shown, the engine body 50 refers, for example, to the cylinder of an internal combustion engine used in a vehicle and includes a cylinder head 50A and a cylinder block 50B. An exhaust catalytic converter 100 can be installed at the exhaust section of the engine body 50. This catalytic converter 110 is connected to an exhaust manifold (not shown) to purify pollutants in the exhaust gas discharged from the engine body 50 through the exhaust manifold, and the purified gas is discharged through an external exhaust pipe 120. Therefore, the catalytic converter 110 is, for example, installed in the cylinder head 50A (connecting to the exhaust manifold inside the cylinder head 50A) and vertically positioned directly below the engine body 50 in the vertical direction (axial Z). The exhaust pipe 120 is, for example, mounted on the cylinder block 50B via a support member 130.
[0044] In this embodiment, as Figure 1 As shown, the exhaust manifold of the engine body 50 connects multiple combustion chambers and aggregates them into a single exhaust port. Thus, the exhaust catalytic converter 100 also includes a tapered member 140, which serves as an exhaust manifold. One end (upstream end 142a) of the tapered member 140 has a flange 144 and is connected and fixed to the cylinder head 50A of the engine body 50 via the flange 144, and connects to the exhaust port of the exhaust manifold. The flange 144 is, for example, formed by a mounting piece installed at the upstream end 142a. Furthermore, the other end (downstream end 142b) of the tapered member 140 is connected to the catalytic converter 110 to facilitate the delivery of exhaust gas from the engine body 50 to the catalytic converter 110. Therefore, the tapered member 140 not only serves to deliver exhaust gas from the engine body 50 to the catalytic converter 110, but also serves to mount / fix the catalytic converter 110 to the engine body 50 (cylinder head 50A).
[0045] Similarly, in this embodiment, as Figure 1 As shown, the exhaust catalytic converter 100 also includes an exhaust connection pipe 150. The upstream end 152a of the exhaust connection pipe 150 is connected to the catalytic converter 110, and the downstream end 152b of the exhaust connection pipe 150 is connected to the exhaust pipe 120. That is, the upstream side of the catalytic converter 110 is connected to the exhaust manifold of the engine block 50 (cylinder head 50A) via a tapered member 140, and the downstream side of the catalytic converter 110 is connected to the exhaust pipe 120 via the exhaust connection pipe 150. Furthermore, the exhaust pipe 120 is connected (fixed) to the engine block 50 (cylinder block 50B) via a support member 120. The specific structure of the engine block 50 (combustion chamber, cylinder, exhaust manifold, etc.) can be found in existing technology and will not be elaborated upon here. This utility model does not limit the connection method between the various components of the engine body 50 and the exhaust catalytic converter 100 (it does not limit whether the exhaust connection pipe 150 is set), nor does it limit the specific structure and type of the engine body 50 (not limited to an internal combustion engine), which can be adjusted according to needs.
[0046] Furthermore, in this embodiment, as Figure 1 As shown, the catalytic converter 110 is configured as a cylindrical catalyst box with a central axis C, which houses the catalyst and connects to the other end (downstream end 142b) of the conical member. Specifically, the catalyst box includes a carrier having a honeycomb structure with a large number of units formed therein, and a catalyst material such as platinum or rhodium loaded on the carrier. The catalytic converter 110 has an inlet end face 110a and an outlet end face 110b. Exhaust gas from the engine body 50 flows into the catalytic converter 110 from the inlet end face 110a through the conical member 140, and the exhaust gas purified by the catalytic converter 110 flows from the outlet end face 110b to the exhaust pipe 120 through the exhaust connection pipe 150. Specific structures of the catalytic converter 110 can be found in the prior art and will not be described in detail here. This invention does not limit the specific structure of the catalytic converter 110, which can be adjusted according to requirements.
[0047] Figure 2 yes Figure 1 A partial cross-sectional view of the exhaust catalytic converter. Figure 3 yes Figure 1 A partial front view of the exhaust catalytic converter. Figure 4 yes Figure 1 A partial top view of the exhaust catalytic converter. Please refer to... Figures 2 to 4 In this embodiment, the tapered member 140 guides the exhaust flow at a right angle. That is, the exhaust flow originates from the engine body 50 (shown in...). Figure 1 The exhaust gas enters the conical member 140 in the horizontal direction D1 and, after being guided by the conical member 140, flows towards the catalytic converter 110 in the vertical direction D2. The angle between the horizontal direction D1 and the vertical direction D2 is a right angle. The conical member 140 has a constriction section 1401 and an expansion section 1402. The constriction section 1401 is located on the upstream side of the exhaust flow and reduces the volume of the conical member 140, while the expansion section 1402 is located on the downstream side of the exhaust flow and increases the volume of the conical member 140. Specifically, the cross-sectional area of the constriction section 1401 of the conical member 140 is smaller than the cross-sectional area of the other end (downstream end 142b) of the conical member 140, and the cross-sectional area of the expansion section 1402 of the conical member 140 is larger than the cross-sectional area of the other end (downstream end 142b) of the conical member 140, thus giving the conical member 140 a smaller volume in the constriction section 1401 and a larger volume in the expansion section 1402.
[0048] As described above, in the exhaust catalytic converter 100 of this embodiment, the conical member 140 rectifies the exhaust gas from the engine body 50 through the constriction portion 1401 and guides the exhaust gas uniformly to the catalyst box of the catalytic converter 110 through the expansion portion 1402. Accordingly, the exhaust gas can flow uniformly to the catalyst box to ensure a uniform temperature distribution of the catalyst, thereby efficiently purifying the exhaust gas through the catalyst and avoiding localized degradation due to uneven temperature. Therefore, the exhaust catalytic converter 100 of this embodiment has excellent exhaust gas purification performance and durability.
[0049] Please refer to Figure 2 In this embodiment, the exhaust catalytic converter 100 (labeled as...) Figure 1 It also includes an exhaust sensor mounting boss 160. The exhaust sensor mounting boss 160 is disposed on the tapered member 140 and located between the contraction portion 1401 and the expansion portion 1402. Accordingly, the exhaust concentration sensor (not shown) mounted on the exhaust sensor mounting boss 160 senses the exhaust flow after it has been rectified by the contraction portion 1401, thereby improving the sensing accuracy.
[0050] like Figure 2 As shown, the tapered member 140 of this embodiment includes two interconnected parts P1 and P2. Part P1 has a flange 144, and part P2 has a contraction portion 1401 and an expansion portion 1402. Dividing the tapered member 140 into part P1 with the flange 144 and part P2 with the contraction portion 1401 and the expansion portion 1402 as described above, makes it easy to integrally form the contraction portion 1401 and the expansion portion 1402 when manufacturing part P2 by a stamping process.
[0051] Figure 5 yes Figure 2 A schematic diagram showing how the conical component guides the exhaust flow. Please refer to... Figure 2 and Figure 5 In this embodiment, the expansion portion 1402 of the tapered member 140 has a flat surface S and extends along the exhaust flow F (indicated by...). Figure 5 The flow direction D3 (indicated in) Figure 5 Therefore, when the exhaust flow F reaches the expansion section 1402 along the flow direction D3, the expansion section 1402 provides sufficient buffer space to avoid a sudden change in the flow direction of the exhaust flow F, so that the exhaust flow F can be smoothly guided to the catalytic converter 110.
[0052] In summary, in the exhaust catalytic converter of this invention, the conical component rectifies the exhaust gas from the engine block through its contraction section and guides the exhaust gas evenly to the catalyst box through its expansion section. Accordingly, the exhaust gas can flow evenly to the catalyst box, ensuring a uniform temperature distribution of the catalyst, thus efficiently purifying the exhaust gas through the catalyst and preventing localized degradation due to uneven temperature. Therefore, the exhaust catalytic converter of this invention possesses excellent exhaust gas purification performance and durability.
[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. An exhaust gas catalytic converter, characterized in that, include: A catalytic converter, including a catalyst box containing a catalyst; as well as A tapered component, one end of which has a flange and is connected to the engine body via the flange, and the other end of which is connected to the catalyst box. The tapered component guides the exhaust flow at a right angle. The tapered member has a contracting portion and an expanding portion. The contraction section is located upstream of the exhaust flow and reduces the volume of the tapered member. The expansion section is located downstream of the exhaust flow and increases the volume of the tapered member.
2. The exhaust gas catalytic converter according to claim 1, characterized in that, It also includes an exhaust sensor mounting boss. The exhaust sensor mounting boss is disposed on the conical member and located between the contraction portion and the expansion portion.
3. The exhaust gas catalytic converter according to claim 1, characterized in that, The tapered component comprises two interlocking parts. One of the two parts has the flange. One of the two parts has the contraction portion and the expansion portion.
4. The exhaust gas catalytic converter according to claim 3, characterized in that, It also includes an exhaust sensor mounting boss. The exhaust sensor mounting boss is located between the contraction portion and the expansion portion.
5. The exhaust gas catalytic converter according to claim 1 or 3, characterized in that, The expansion portion has a flat surface and protrudes along the flow direction of the exhaust flow.