CN211819593U - SCR exhaust mixing device - Google Patents
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- CN211819593U CN211819593U CN201921970827.XU CN201921970827U CN211819593U CN 211819593 U CN211819593 U CN 211819593U CN 201921970827 U CN201921970827 U CN 201921970827U CN 211819593 U CN211819593 U CN 211819593U
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Abstract
The utility model provides a SCR exhaust mixing arrangement, include the SCR exhaust mixing arrangement who comprises outer cylinder, inner cylinder, entry baffle, runner baffle, export baffle, guide plate and orifice plate. The engine exhaust and urea spray enter a circumferential flow channel formed by an outer cylinder, an inner cylinder, an inlet partition plate and an outlet partition plate through a mixed gas inlet, and then enter a cylindrical flow channel in the inner cylinder through an inner cylinder communication flow port and a flow guide hole which are arranged on the inner cylinder. The utility model discloses can the effective control mixer axial dimension, improve exhaust mixing uniformity, reduce the crystallization risk in the exhaust pipe, reduce SCR system cost, satisfy six post-treatment system's in the state requirement.
Description
Technical Field
The application belongs to the technical field of engine exhaust aftertreatment, and particularly relates to an SCR exhaust mixing device.
Background
The six standards of the pollutant discharge state of the heavy-duty diesel vehicle are already released. In the 6a stage, the implementation time of urban vehicles is 2020 and 7 months, and the implementation time of all vehicles is7 months in 2021. SCR (Selective Catalytic Reduction) technology is a necessary choice for reducing NOx emission of national heavy-duty diesel vehicles, particularly SCR No under the 'EGR-free' routexThe average conversion efficiency of the method is required to be up to more than 95 percent. Diesel vehicle six aftertreatment systems must include a DOC (Diesel oxidation catalyst), DPF (Diesel Particulate Filter) and SCR system, and due to the space constraints on the vehicle, coupled with the high requirements of the six emissions limits, aftertreatment systems, particularly SCR systems, encounter new challenges. To meet the SCR high efficiency and low ammonia slip requirements, the injected reactant (typically an aqueous liquid urea solution) has a fluid velocity uniformity and NH prior to entering the SCR catalyst3Must be ensured while the system pressure drop loss and size are minimized.
SCR is characterized in that a certain amount of urea aqueous solution is sprayed into an exhaust pipe, and a reducing agent NH is obtained through atomization, evaporation, pyrolysis and hydrolysis processes3，NH3Selective application of pollutant No to catalyst surfacexReduction to N2Thereby reducing No in tail gasxThe content of (a). NH at SCR inlet3Uniformity of distribution to NoxConversion and vector lifetime have important effects. NH (NH)3Non-uniform distribution can lead to localized carrier NH3Excessive crystals are easily formed on the surfaces of metal and carrier at low temperature, and the crystals can block an exhaust pipe in serious conditions, so that the dynamic property of an engine is reduced, and NH can be caused3Leakage occurs. And in NH3The lean region results in a low NOx conversion efficiency. With NH3Improved uniformity, increased SCR conversion efficiency, NH3The leakage is reduced. Long NH time3Non-uniform distribution can result in non-uniform catalyst aging, which affects the overall life of the catalyst and performance of the SCR system. The uneven distribution of urea liquid drops can cause that the local temperature is too low and the urea concentration is too high, the uneven temperature change easily causes the uneven heating of the carrier, so that the uneven expansion finally generates stress to cause the carrier to be broken.
In diesel aftertreatment, the main causes of backpressure increase are DPF and SCR mixers, with increasing DPF drag characteristics as soot particles are continuously trapped in the DPF channels, and engine performance deteriorates when the total backpressure exceeds a certain value. The design of the SCR mixer needs to take into account the influence of various factors, and not only requires small pressure loss and can improve the SCR conversion efficiency, but also has high requirements on the compactness of the size, the convenience of processing, the flexibility of use and installation, the mechanical durability of use, the corrosion resistance of materials and the like.
The existing SCR technology needs to try to uniformly mix the sprayed reactant with the engine exhaust, and due to the limitation of the structure and the size, the reactant and the engine exhaust cannot achieve an absolutely ideal mixing state. The general optimization method is to design a special mixing device and allow the reactant and the exhaust gas to be mixed for a long enough time before entering the SCR catalytic unit. The method of lengthening the length of the mixing tube, while the simplest and most effective, places greater demands on the overall vehicle layout and also increases the manufacturing cost of the exhaust pipe. How to achieve the full and fast mixing of the reactant and the exhaust gas in the exhaust pipe which is as short as possible, reduce the crystallization risk of the reactant in the exhaust pipe, and reduce the influence of the mixer structure on the exhaust back pressure becomes one of the key problems of successful application of the SCR system.
A novel SCR exhaust mixing device is developed, and aims to effectively control the axial size of a mixer, improve the exhaust mixing uniformity, reduce the crystallization risk in an exhaust pipe, reduce the cost of an SCR system and meet the requirements of a national six-aftertreatment system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above problem, provide a novel SCR exhaust mixing device, can effective control mixer axial dimension, improve exhaust mixing uniformity, reduce the crystallization risk in the exhaust pipe, reduce SCR system cost, satisfy six post processing system's in state requirement.
In order to achieve the above object, the present application provides an SCR exhaust mixing device, which at least comprises an outer cylinder, an inner cylinder, an inlet partition plate, an outlet partition plate, and a flow passage partition plate; the length of the outer cylinder is greater than that of the inner cylinder, and an inner cylinder communicating flow port for exhausting gas to flow into the inner cylinder is formed in the arc surface of the inner cylinder;
the inlet partition plate and the outlet partition plate are arranged inside the outer cylinder and at two ends of the inner cylinder, a mixed gas inlet which is only communicated with the exhaust flow passage space between the inner cylinder and the outer cylinder is arranged close to the outer position on the inlet partition plate, and one end of the mixed gas inlet in the circumferential direction of the cylinder is close to the inner cylinder communication flow port;
the center of the outlet clapboard is provided with a mixed gas outlet which is only communicated with the space of the inner cylinder, and the excircle of the inlet clapboard and the excircle of the outlet clapboard are fixed on the outer cylinder and are connected with the end surface of the inner cylinder;
the flow channel clapboard is equal to the inner cylinder in length, is arranged between the outer cylinder and the inner cylinder as well as between the inlet clapboard and the outlet clapboard, is intersected with the inner cylinder at the edge of the inner cylinder communicating flow port in a tangential way, and is vertically intersected with the inlet clapboard near the edge of the mixed gas inlet, so that a circumferential annular flow channel between the inner cylinder and the outer cylinder from the mixed gas inlet, a radial flow channel from the outer cylinder to the inner cylinder through the inner cylinder communicating flow port and a cylindrical flow channel leading to the inner part of the inner cylinder of the mixed gas outlet are formed.
According to the technical scheme, after the reducing agent is injected into the engine exhaust gas by the reducing agent nozzle, the flow area from the inner space of the outer cylinder at the upstream of the inlet partition plate to the mixed gas inlet is reduced, the exhaust gas flow speed at the mixed gas inlet is high, and the mixing effect of the reducing agent and the engine exhaust gas at the mixed gas inlet is enhanced for the first time. Meanwhile, because the flow speed of exhaust gas at the mixed gas inlet is high, the liquid drops of the reducing agent which are not fully pyrolyzed are difficult to generate crystallization and retention. After entering the mixer, the moving space of the mixed gas is a circumferential annular flow channel, a radial flow channel of the outer cylinder towards the inner cylinder and a cylindrical flow channel inside the inner cylinder, and the moving path of the mixed gas is a broken line which is changed in direction for many times, so that the length of the path is prolonged, the full pyrolysis of the reducing agent before reaching the SCR catalyst is facilitated, and the exhaust gas of the engine is fully and uniformly mixed with the reducing agent.
The annular flow passage in the circumferential direction is provided with a guide plate, and the inner cylinder is provided with a guide hole. The speed direction of the mixed gas is changed after the mixed gas collides with the guide plate, and the flow speed of the exhaust gas is reduced. However, the flow guide plate reduces the flow area of the circumferential annular flow passage, the exhaust flow speed is increased at the flow area, and the flow area of the flow guide hole is small, so that the exhaust flow speed at the flow position is increased. The mixing effect of the reducing agent and the engine exhaust gas is secondly enhanced at the baffle.
When the mixed gas reaches the position near the flow channel partition plate through the circumferential annular flow channel, the mixed gas collides with the flow channel partition plate, the diffusion speed is reduced, and meanwhile, the mixed gas radially moves through the inner cylinder communicating flow port and enters the cylindrical flow channel in the inner cylinder. The mixed gas entering the inner cylinder cylindrical flow channel through the flow guide hole collides with the mixed gas entering the inner cylinder cylindrical flow channel through the inner cylinder communicating flow port to generate a rotating flow around the axis of the inner cylinder, and the mixing effect of the reducing agent and the engine exhaust is enhanced for the third time in the inner cylinder cylindrical flow channel.
In the whole circulation process, except for small local corner stagnation points, the mixed gas flows basically smoothly, and the risk of a large amount of crystals generated by the reducing agent is low.
The following technical solutions further define or optimize the present application.
Optionally, the SCR exhaust mixing device further includes an outer cylinder inner space upstream of the inlet partition plate, and an outer cylinder inner space downstream of the outlet partition plate, the SCR reducing agent nozzle injects the reducing agent into the outer cylinder space upstream of the inlet partition plate from a side of the outer cylinder farther from the mixture inlet, and injects the reducing agent toward the mixture inlet, and the mixing space of the reducing agent and the engine exhaust includes the outer cylinder inner space upstream of the inlet partition plate, the circumferential annular flow passage, the cylindrical flow passage inside the inner cylinder, and the outer cylinder inner space downstream of the outlet partition plate.
Optionally, the opening area of the mixed gas inlet is equal to 1/6-1/3 of the cross-sectional area of the outer cylinder, and the area of the internal flow section of the inner cylinder, the opening area of the mixed gas outlet, the cross-sectional area of the circumferential annular flow channel, and the area of the inner cylinder communication flow port are all equal to the opening area of the mixed gas inlet, namely 0.7-1.5 times of the opening area of the mixed gas inlet.
Optionally, the SCR exhaust mixing device further includes a guide plate located inside the circumferential annular flow channel, the length of the guide plate is smaller than the distance between the inlet partition plate and the outlet partition plate, and the guide plate and the axis of the cylinder are fixed on the outer wall of the inner cylinder and the outlet partition plate at an inclined angle, so that the mixed gas flowing inside the circumferential annular flow channel is axially deflected toward the inlet partition plate.
Optionally, a flow guide hole is formed in the middle of the circumferential annular flow channel on the inner cylinder, and the flow guide hole and the inner cylinder communicated flow port are arranged close to the axial symmetry and are located at the upstream of the flow guide plate.
Optionally, the SCR exhaust mixing device includes at least two pairs of baffles and guide holes, and the guide holes are located on the inner cylinder and upstream of the corresponding baffles.
Optionally, the normal of the guide plate forms an inclination angle of 30-60 degrees with the axis of the inner cylinder, and forms an inclination angle of 30-60 degrees with the circumferential tangent of the inner cylinder.
Optionally, the SCR exhaust mixing device further comprises a perforated plate located downstream of and parallel to the outlet baffle plate.
Optionally, a DOC catalyst or/and a DPF is arranged upstream of the SCR exhaust mixing device, and an SCR catalyst is arranged downstream of the SCR exhaust mixing device.
The technical scheme at least comprises the following beneficial effects:
the axial size of the mixer is effectively controlled, the exhaust mixing uniformity is improved, the crystallization risk in the exhaust pipe is reduced, the cost of an SCR system is reduced, and the requirements of a national post-treatment system are met.
Drawings
FIG. 1 is a schematic diagram of an SCR catalytic exhaust system of a diesel engine provided by an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram A of an SCR exhaust mixing device provided by an embodiment of the present application;
FIG. 3 is a schematic structural diagram B of an SCR exhaust mixing device provided by an embodiment of the present application;
FIG. 4 is a schematic structural diagram C of an SCR exhaust mixing device provided by an embodiment of the present application;
FIG. 5 is a schematic structural diagram D of an SCR exhaust mixing device provided by an embodiment of the present application;
FIG. 6 is a schematic structural diagram E of an SCR exhaust mixing device provided by an embodiment of the present application;
FIG. 7 is a schematic structural diagram of another SCR exhaust mixing device provided by an embodiment of the present application;
FIG. 8 is a schematic view of yet another SCR exhaust mixing device provided by an embodiment of the present application
FIG. 9 is a schematic illustration of yet another SCR exhaust mixing device provided by an embodiment of the present application;
fig. 10 is a schematic structural diagram of a perforated plate according to an embodiment of the present disclosure.
In the figure: the device comprises an outer cylinder 1, an inner cylinder 2, an inlet clapboard 3, an outlet clapboard 4, a flow channel clapboard 5, an inner cylinder communicated flow port 6, a mixed gas inlet 7, a mixed gas outlet 8, a circumferential annular flow channel 9, a radial flow channel 10, a cylindrical flow channel 11, an SCR reducing agent nozzle 12, a flow guide plate 13, a flow guide hole 14, an inclination angle 15, a sieve plate 16, a DOC carrier 17, a DPF carrier 18 and an SCR carrier 19.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
The embodiment of the application provides a SCR exhaust mixing device, and the SCR exhaust mixing device is suitable for an SCR catalytic exhaust system of a diesel engine.
As shown in fig. 1 and 2, the SCR exhaust gas mixing device includes at least an outer cylinder 1, an inner cylinder 2, an inlet partition plate 3, an outlet partition plate 4, and a flow passage partition plate 5.
The length of the outer cylinder 1 is greater than the length 2 of the inner cylinder, and the inner cylinder 2 is located inside the outer cylinder 1.
As shown in fig. 3, an inner cylinder communicating flow port 6 is formed on the arc surface of the inner cylinder 2, and the inner cylinder communicating flow port 6 is used for allowing exhaust gas to flow into the inner cylinder.
An inlet partition 3 and an outlet partition 4 are provided inside the outer cylinder 1, and the inlet partition 3 and the outlet partition 4 are provided at both ends of the inner cylinder 3.
The inlet partition plate 3 is provided with a mixture gas inlet 7, and the mixture gas inlet 7 is used for allowing the gas flowing out of the DPF carrier 18 to flow into the exhaust gas flow passage space between the outer cylinder 1 and the inner cylinder 2.
As shown in fig. 4, the outlet partition 4 is provided with a mixture outlet 8 at the center thereof.
The outer circles of the inlet partition plate 3 and the outlet partition plate 4 are fixed to the outer cylinder 1. The inlet baffle 3 and the outlet baffle 4 are connected to the inner cylinder. Specifically, the inlet partition 3 is connected to one end face of the inner cylinder 2. The outlet partition plate 4 is connected with the other end face of the inner cylinder 2, or the center of the outlet partition plate 4 is fixed on the arc face of the inner cylinder 2, and the outlet partition plate 4 is close to the other end face of the inner cylinder 2.
Alternatively, the inner diameter of the mixture outlet 8 is equal to the outer diameter of the inner cylinder 2.
The flow channel partition plate 5 is equal to the inner cylinder 2 in length, the flow channel partition plate 5 is arranged between the outer cylinder 1 and the inner cylinder 2 and is positioned between the inlet partition plate 3 and the outlet partition plate 4, and the flow channel partition plate 5 is connected with the arc surface of the inner cylinder 2. As shown in fig. 4, the flow path partition plate 5 partitions the mixed gas inlet 7 and the inner cylinder communicating flow port 6, that is, one side of the flow path partition plate 5 is the mixed gas inlet 7, and the other side of the flow path partition plate 5 is the inner cylinder communicating flow port 6.
Optionally, the flow channel partition 5 is located as far as possible on the tangent plane of the circular arc surface of the inner cylinder 2.
As can be seen from fig. 3, 4, 5, the SCR exhaust gas mixing device includes at least a circumferential annular flow passage 9 between the inner and outer cylinders from the mixture inlet 7, a radial flow passage 10 from the outer cylinder to the inner cylinder through the inner cylinder communication flow port 6, and a cylindrical flow passage 11 leading to the inside of the inner cylinder of the mixture outlet 8.
The SCR exhaust gas mixing device also comprises an outer cylinder inner space at the upstream of the inlet clapboard 3 and an outer cylinder inner space at the downstream of the outlet clapboard 4, and the SCR reducing agent nozzle 12 sprays reducing agent into the outer cylinder inner space at the upstream of the inlet clapboard 3 from one side of the outer cylinder far away from the mixed gas inlet 7 and faces the mixed gas inlet 7; the mixing space of the reducing agent and the engine exhaust gas includes the outer cylinder inner space upstream of the inlet partition plate 3, the circumferential annular flow passage 9, the cylindrical flow passage 11 inside the inner cylinder, and the outer cylinder inner space downstream of the outlet partition plate 4.
Optionally, the opening area of the mixed gas inlet 7 is equal to 1/6-1/3 of the cross-sectional area of the outer cylinder 1.
Optionally, the area of the internal circulation section of the inner cylinder, the opening area of the mixed gas outlet 8, the cross sectional area of the circumferential annular flow channel 9, and the area of the inner cylinder communication flow port 6 are all equal to the opening area of the mixed gas inlet 7, that is, the area of the internal circulation section of the inner cylinder, the opening area of the mixed gas outlet 8, the cross sectional area of the circumferential annular flow channel 9, and the area of the inner cylinder communication flow port 6 are all 0.7 to 1.5 times of the opening area of the mixed gas inlet 7.
In an alternative embodiment based on the above embodiment, the SCR exhaust gas mixing device further comprises a deflector 13.
The length of the baffle 13 is less than the distance between the inlet 3 and outlet 3 baffles.
The baffle 13 is located inside the circumferential annular flow channel 9. Specifically, the guide plate 13 is fixed on the outer wall of the inner cylinder 2 in an inclined manner, i.e. the guide plate is fixed on the outer wall of the inner cylinder at an inclined angle with the axis of the inner cylinder; and the baffle 13 is fixed to the outlet baffle 4.
The baffle 13 deflects the mixture flowing in the circumferential annular flow path 9 in the axial direction toward the inlet partition 3.
The middle part of the annular flow channel in the circumferential direction on the inner cylinder 2 is provided with a flow guide hole 14, the flow guide hole 14 and the inner cylinder communicating flow port 6 are arranged close to the axial symmetry, and the flow guide hole 13 is positioned at the upstream of the flow guide plate 14.
Alternatively, the SCR exhaust gas mixing device includes at least two pairs of guide plates 13 and guide holes 14, and the guide holes 14 are located on the inner cylinder 2 and upstream of the corresponding guide plates 14, as shown in fig. 7.
Optionally, the normal to baffle 14 is at an angle of 30 ° to 60 ° to the axis of the inner cylinder and 30 ° to 60 ° to the circumferential tangent of the inner cylinder. As shown in fig. 8, the normal to baffle 14 is at an angle of 40 ° to the inner cylinder axis; as shown in fig. 9, the normal to the baffle 14 is at an angle of 50 ° to the inner cylinder axis.
In an alternative embodiment based on the above embodiment, the SCR exhaust gas mixing device further comprises a perforated plate 16, which is located downstream of and parallel to the outlet baffle plate.
Alternatively, the holes in the perforated plate 16 are evenly distributed, as shown in fig. 10.
Optionally, the diameter of the perforated plate is equal to the diameter of the outlet baffle.
As shown in fig. 1, when the SCR exhaust gas mixing device is installed in an SCR catalytic exhaust system of a diesel engine, a DOC catalyst or/and a DPF is provided upstream of the SCR exhaust gas mixing device, and an SCR catalyst is provided downstream of the SCR exhaust gas mixing device.
It should be noted that, in the embodiments of the present application, the terms "upstream" and "downstream" are determined according to the flowing direction of the gas, and the gas flows from the inflow to the outflow as from the upstream to the downstream; taking fig. 1 as an example, gas enters from the left side, and gas exits from the right side, and from the left to the right, the gas enters from the upstream to the downstream.
Any modification, simplification and other alternative ways without departing from the principles of the present invention are included in the protection scope of the present invention.
The utility model discloses the part that does not relate to is the same with prior art or can adopt prior art to realize.
Claims (9)
1. An SCR exhaust mixing device is characterized by at least comprising an outer cylinder, an inner cylinder, an inlet clapboard, an outlet clapboard and a flow channel clapboard;
the length of the outer cylinder is greater than that of the inner cylinder, and an inner cylinder communicating flow port through which exhaust gas flows into the inner cylinder is formed in the arc surface of the inner cylinder;
the inlet partition plate and the outlet partition plate are arranged in the outer cylinder and are arranged at two ends of the inner cylinder;
a mixed gas inlet is arranged on the inlet clapboard and is used for enabling gas to flow into the exhaust runner space between the inner cylinder and the outer cylinder;
the center of the outlet clapboard is provided with a mixed gas outlet communicated with the space of the inner cylinder, and the excircles of the inlet clapboard and the outlet clapboard are fixed on the outer cylinder and connected with the inner cylinder;
the flow channel clapboard is equal to the inner cylinder in length and is arranged between the outer cylinder and the inner cylinder as well as between the inlet clapboard and the outlet clapboard, and the mixed gas inlet and the inner cylinder communicating flow port are separated by the flow channel clapboard;
the SCR exhaust mixing device at least comprises a circumferential annular flow channel between an inner cylinder and an outer cylinder from the mixed gas inlet, a radial flow channel from the outer cylinder to the inner cylinder through an inner cylinder communication flow port, and a cylindrical flow channel leading to the inner part of the inner cylinder of the mixed gas outlet.
2. The SCR exhaust gas mixing device according to claim 1, further comprising an outer cylinder inner space upstream of the inlet partition, and an outer cylinder inner space downstream of the outlet partition, wherein the SCR reductant nozzle injects the reductant into the outer cylinder space upstream of the inlet partition from a side of the outer cylinder farther from the mixture inlet and against the mixture inlet, and wherein the mixing space of the reductant with the engine exhaust gas includes the outer cylinder inner space upstream of the inlet partition, the circumferential annular flow passage, the cylindrical flow passage inside the inner cylinder, and the outer cylinder inner space downstream of the outlet partition.
3. The SCR exhaust mixing device of claim 2, wherein an opening area of the mixture inlet is equal to 1/6-1/3 of the cross-sectional area of the outer cylinder; the area of the internal circulation section of the inner cylinder, the opening area of the mixed gas outlet, the area of the cross section of the circumferential annular flow channel and the area of the inner cylinder communication flow port are 0.7-1.5 times of the opening area of the mixed gas inlet.
4. The SCR exhaust mixing device of claim 3, further comprising a deflector positioned within the circumferential annular flow channel, the deflector having a length less than the distance between the inlet baffle and the outlet baffle, the deflector being fixed to the outer wall of the inner cylinder and to the outlet baffle at an angle oblique to the cylinder axis to redirect the mixture flowing within the circumferential annular flow channel axially toward the inlet baffle.
5. The SCR exhaust gas mixing device as recited in claim 4, wherein a guide hole is provided in the inner cylinder at a middle portion of the circumferential annular flow passage, the guide hole being axisymmetrically arranged with respect to the inner cylinder communication flow port, the guide hole being located upstream of the guide plate.
6. The SCR exhaust mixing device of claim 4, comprising at least two pairs of deflectors and deflector holes located on the inner cylinder upstream of the respective deflectors.
7. The SCR exhaust gas mixing device of any one of claims 4 to 6, wherein the normal to the deflector is inclined at an angle of 30 ° to 60 ° to the axis of the inner cylinder and at an angle of 30 ° to 60 ° to the circumferential tangent of the inner cylinder.
8. An SCR exhaust mixing device as defined in any one of claims 1 to 3, further comprising a mesh panel downstream of and parallel to the outlet baffle.
9. The SCR exhaust gas mixing device of any one of claims 1 to 6, wherein a DOC catalyst or/and a DPF is provided upstream of the SCR exhaust gas mixing device, and an SCR catalyst is provided downstream of the SCR exhaust gas mixing device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921970827.XU CN211819593U (en) | 2019-11-14 | 2019-11-14 | SCR exhaust mixing device |
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| CN201921970827.XU CN211819593U (en) | 2019-11-14 | 2019-11-14 | SCR exhaust mixing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542247A (en) * | 2022-01-18 | 2022-05-27 | 潍柴动力股份有限公司 | SCR system and engine |
| CN114738084A (en) * | 2021-01-07 | 2022-07-12 | 长城汽车股份有限公司 | Automobile aftertreatment system and automobile |
-
2019
- 2019-11-14 CN CN201921970827.XU patent/CN211819593U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114738084A (en) * | 2021-01-07 | 2022-07-12 | 长城汽车股份有限公司 | Automobile aftertreatment system and automobile |
| CN114542247A (en) * | 2022-01-18 | 2022-05-27 | 潍柴动力股份有限公司 | SCR system and engine |
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