Vehicle waste gas treatment mechanism, vehicle post-treatment system and vehicle

Abstract

The invention belongs to the technical field of vehicle noise and waste gas treatment, and relates to a vehicle waste gas treatment mechanism, a vehicle post-treatment system and a vehicle. The vehicle waste gas treatment mechanism comprises a shell, a heater, a catalytic converter and a filter, a channel allowing waste gas exhausted by an engine to pass through is formed in the shell, and the heater, the catalytic converter and the filter are sequentially arranged in the channel in the flowing direction of the waste gas. The heater is used for heating the waste gas in the channel to a preset temperature, the catalyst is used for carrying out oxidation-reduction reaction on the waste gas reaching the preset temperature, and the filter is used for filtering particulate matters in the waste gas. According to the vehicle waste gas treatment mechanism, harmful substances in waste gas can be effectively removed at the initial starting stage of a vehicle, vibration and noise of an engine can be reduced, and the engine can obtain good NVH performance at the initial starting stage.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle noise and exhaust gas treatment, and in particular relates to a vehicle exhaust gas treatment mechanism, a vehicle post-treatment system and a vehicle. Background Art

[0002] The vehicle's exhaust gas treatment mechanism is generally connected to the exhaust pipe of the engine, and is mainly used to remove harmful substances in the exhaust gas discharged from the exhaust pipe. However, the removal of the harmful substances usually needs to be carried out under high temperature conditions (such as 300℃-700℃), and at the initial start-up of the vehicle, due to the low engine temperature, the exhaust gas temperature is also low (generally around 100℃). At this time, the exhaust gas treatment mechanism will find it difficult to effectively remove harmful substances in the exhaust gas. In addition, at the initial start-up, in order to ensure that emissions meet standards, lean combustion, delayed ignition and other technologies are usually used, which will cause poor combustion in the engine cylinder at this stage, and the engine's vibration and noise are both large. The engine's vibration and noise performance are worse than the warm-up state, and do not meet the NVH (Noise, Vibration, Harshness) target requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is that, in view of the technical problems that the existing exhaust gas treatment mechanism is difficult to effectively remove harmful substances in the exhaust gas at the initial stage of vehicle startup, and the engine vibration and noise are large at the initial stage of startup, a vehicle exhaust gas treatment mechanism, a vehicle after-treatment system and a vehicle are provided.

[0004] To solve the above technical problems, on the one hand, an embodiment of the present invention provides a vehicle exhaust treatment mechanism, including a shell, a heater, a catalyst and a filter, the shell is provided with a channel for the exhaust gas discharged by the engine to pass through, the heater, the catalyst and the filter are sequentially arranged in the channel along the flow direction of the exhaust gas, the heater is used to heat the exhaust gas in the channel to a preset temperature, the catalyst is used to provide the exhaust gas that has reached the preset temperature for oxidation-reduction reaction, and the filter is used to filter particulate matter in the exhaust gas.

[0005] According to the vehicle exhaust treatment mechanism of the embodiment of the present invention, when the engine is started, it is no longer necessary to use lean combustion or delayed ignition and other rapid heating technologies to quickly heat up the exhaust gas generated by the engine combustion. Instead, the exhaust gas is discharged and flows into the housing, first heated by the heater, and the exhaust gas is quickly heated by the heater, then passes through the catalyst and the filter, and finally discharged from the exhaust end of the housing. Since the heater can heat the exhaust gas to a preset temperature to ensure that the exhaust gas can undergo an oxidation-reduction reaction with the catalyst at the preset temperature, the vehicle exhaust treatment mechanism can effectively remove harmful substances in the exhaust gas even at the initial start-up of the vehicle. When the vehicle exhaust treatment mechanism is used in a vehicle, since it is no longer necessary to use lean combustion or delayed ignition and other rapid heating technologies, the structure of the engine can be simplified, and the vibration and noise generated by the application of lean combustion or delayed ignition and other rapid heating technologies can be reduced, so that the engine can obtain good NVH performance at the initial start-up. Optionally, the heater includes a heating body and a conductor, the conductor is electrically connected to the heating body, the heating body is used to heat the exhaust gas to the preset temperature, and the conductor is suitable for an external power supply.

[0006] Optionally, the heat generating body is formed by winding a heating sheet, and the winding direction of the heating sheet intersects with the flow direction of the exhaust gas.

[0007] Optionally, when the heating sheet is wound, a spiral gap is formed for the exhaust gas to pass through, and the spiral gap extends along the flow direction of the exhaust gas.

[0008] Optionally, the heating body is formed by winding a resistance wire, and the winding direction of the resistance wire intersects with the flow direction of the exhaust gas.

[0009] Optionally, when the resistance wire is wound, a spiral gap is formed for the exhaust gas to pass through.

[0010] Optionally, the heating body is provided with a plurality of air guide holes extending along the flow direction of the exhaust gas.

[0011] Optionally, a plurality of the air guide holes are provided, and the plurality of the air guide holes are arranged in a honeycomb shape.

[0012] Optionally, the preset temperature is 300°C-700°C.

[0013] Optionally, the shell includes a first shell, a second shell, a third shell, a fourth shell and a fifth shell connected in sequence, the heater is installed in the second shell, and the catalyst and the filter are installed in the fourth shell.

[0014] Optionally, the second shell and the fourth shell are both cylindrical, and the axis of the second shell is perpendicular to the axis of the fourth shell.

[0015] Optionally, the vehicle exhaust treatment mechanism further includes a turbocharger, the air intake end of the housing is connected to the turbocharger, and the turbocharger is suitable for connecting to an exhaust passage of an engine.

[0016] Optionally, the vehicle exhaust treatment mechanism further comprises a connecting clamp connected between the air intake end of the housing and the turbocharger.

[0017] On the other hand, an embodiment of the present invention provides a vehicle after-treatment system, which includes an engine and the above-mentioned vehicle exhaust treatment mechanism, wherein the engine is provided with an exhaust passage, and the air intake end of the shell is connected to the exhaust passage.

[0018] Optionally, the engine comprises an engine cylinder block and an engine cylinder head connected to the engine cylinder block, the engine cylinder block is provided with a first exhaust passage, the engine cylinder head is provided with a second exhaust passage, and the first exhaust passage is connected with the second exhaust passage to form the exhaust passage;

[0019] The air inlet end of the housing is communicated with the second exhaust passage.

[0020] On the other hand, an embodiment of the present invention provides a vehicle, which includes the above-mentioned vehicle exhaust gas treatment mechanism or the above-mentioned vehicle after-treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a vehicle exhaust gas treatment mechanism provided by an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram without the turbocharger;

[0023] Figure 3 yes Figure 2 sectional view of

[0024] Figure 4 yes Figure 3 Schematic diagram of the middle heater;

[0025] Figure 5 Schematic diagram of a vehicle post-processing system provided by an embodiment of the present invention.

[0026] The reference numerals in the specification are as follows:

[0027] 10. Vehicle exhaust treatment mechanism;

[0028] 1. Shell; 11. First shell; 12. Second shell; 13. Third shell; 14. Fourth shell; 15. Fifth shell;

[0029] 2. Heater; 21. Heating body; 211. Resistance wire; 22. Conductor; 221. Positive electrode; 222. Negative electrode;

[0030] 3. Catalyst;

[0031] 4. Filter;

[0032] 5. Turbocharger;

[0033] 6. Connect the clamp;

[0034] 20. engine; 201. engine cylinder block; 202. engine cylinder head;

[0035] 30. The first bracket;

[0036] 40. The second bracket. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] like Figures 1 to 4 As shown, the vehicle exhaust gas treatment mechanism 10 provided by the embodiment of the present invention comprises a housing 1, a heater 2, a catalyst 3 and a filter 4. The housing 1 is provided with a filter for supplying exhaust gas to the engine 20 (see Figure 5 The exhaust gas discharged from the engine 20) shown in the figure passes through the channel, the heater 2, the catalyst 3 and the filter 4 are arranged in the channel in sequence along the flow direction of the exhaust gas, the heater 2 is used to heat the exhaust gas in the channel to a preset temperature, the catalyst 3 is used to provide the exhaust gas reaching the preset temperature for oxidation-reduction reaction, and the filter 4 is used to filter particulate matter in the exhaust gas.

[0039] The vehicle exhaust gas treatment mechanism 10 provided by the embodiment of the present invention, when the engine is started, no longer needs to use lean combustion or delayed ignition and other rapid heating technologies to quickly heat up the exhaust gas generated by the engine combustion, but the exhaust gas is discharged and flows into the housing 1, first heated by the heater 2, and the exhaust gas is quickly heated by the heater, and then passes through the catalyst 3 and the filter 4, and finally discharged from the exhaust end of the housing 1. Since the heater 2 can heat the exhaust gas to a preset temperature to ensure that the exhaust gas can undergo an oxidation-reduction reaction with the catalyst 3 at the preset temperature, the vehicle exhaust gas treatment mechanism 10 can effectively remove harmful substances in the exhaust gas even at the initial start-up of the vehicle. When the vehicle exhaust gas treatment mechanism is used in a vehicle, since it is no longer necessary to use lean combustion or delayed ignition and other rapid heating technologies, the structure of the engine can be simplified, and the vibration and noise generated by the application of lean combustion or delayed ignition and other rapid heating technologies can be reduced, so that the engine can obtain good NVH performance at the initial start-up. The vehicle exhaust gas treatment mechanism 10 has important practical value for the achievement of the future National Seven Emission Standard.

[0040] In one embodiment, if Figure 4 As shown, the heater 2 includes a heating body 21 and a conductor 22, the conductor 22 is electrically connected to the heating body 21, the heating body 21 is used to heat the exhaust gas to the preset temperature, and the conductor 22 is suitable for an external power supply.

[0041] When the conductor 22 is energized, the current will be conducted to the heating body 21, so that the heating body 21 can heat the exhaust gas to a preset temperature, so as to facilitate the subsequent redox reaction.

[0042] In one embodiment, if Figure 4 As shown, the heating body 21 has a positive electrode and a negative electrode, and the conductor 22 includes a positive electrode 221 and a negative electrode 222. The positive electrode 221 is electrically connected to the negative electrode of the heating body 21 and the negative electrode of the external power supply, and the negative electrode 222 is electrically connected to the positive electrode of the heating body 21 and the positive electrode of the external power supply, so as to realize the conductive connection between the heating body 21, the conductor 22 and the external power supply. When the power is turned on, the positive and negative currents pass through the positive electrode 221 and the negative electrode 222 to reach the heating body 21, and then the heating body 21 generates high temperature, thereby heating the exhaust gas passing through.

[0043] In one embodiment, if Figure 4 As shown, the heating body 21 is formed by winding a resistance wire 211, and the winding direction of the resistance wire 211 intersects with the flow direction of the exhaust gas. Preferably, the winding direction of the resistance wire 211 is perpendicular to the flow direction of the exhaust gas.

[0044] When the resistance wire 211 is wound, a spiral gap is formed for the exhaust gas to pass through.

[0045] When the exhaust gas passes through the spiral gap, the heat of the resistance wire 211 will be transferred to the exhaust gas, so that the exhaust gas is quickly heated to the preset temperature, so that the exhaust gas can undergo a more complete redox reaction with the catalyst 3 .

[0046] In one embodiment, the material of the resistance wire 211 is a metal material. In other embodiments, the material of the resistance wire can also be replaced by other materials that can generate heat and withstand high temperatures.

[0047] In other embodiments, the heating body may also be formed by winding a heating sheet, and the winding direction of the heating sheet intersects with the flow direction of the exhaust gas. Preferably, the winding direction of the heating sheet is perpendicular to the flow direction of the exhaust gas.

[0048] When the heating sheet is wound, a spiral gap is formed for the exhaust gas to pass through, and the spiral gap extends along the flow direction of the exhaust gas.

[0049] When the exhaust gas passes through the spiral gap, the heat of the heating plate will be transferred to the exhaust gas, causing the exhaust gas to quickly heat up to the preset temperature, so that the exhaust gas can undergo a more complete redox reaction with the catalyst. In addition, since the gap extends along the flow direction of the exhaust gas, it can avoid blocking the flow of the exhaust gas, ensuring the flow speed of the exhaust gas and the subsequent redox efficiency. The heating plate is made of a material that can generate heat and withstand high temperatures, such as silicon-carbon composite materials, graphite, ceramics, etc.

[0050] In other embodiments, the heating body may also be a columnar structure extending along the flow direction of the exhaust gas. In this case, a plurality of air guide holes extending along the flow direction of the exhaust gas may be provided on the heating body so that the exhaust gas can pass through the heating body.

[0051] When the exhaust gas passes through the air guide hole, the heat of the heating body will be transferred to the exhaust gas, so that the exhaust gas is quickly heated to the preset temperature, so that the exhaust gas can have a more complete redox reaction with the catalyst. The heating body is also made of a material that can generate heat and withstand high temperatures, such as silicon-carbon composite materials, graphite, ceramics, etc.

[0052] Furthermore, the air guide holes may be provided in plurality, and the plurality of air guide holes may be arranged in a honeycomb shape. By arranging the plurality of air guide holes in a honeycomb shape, the structure of the heating body may be more compact, the volume may be smaller, the space utilization rate may be higher, the heat preservation effect may be better, and the degree of integration may be higher.

[0053] Alternatively, in other embodiments, the plurality of air guide holes may be arranged in a grid shape. By arranging the plurality of air guide holes in a grid shape, the structure of the heating body can be made more compact, the volume can be smaller, the space utilization rate can be higher, the heat preservation effect can be better, and the degree of integration can be higher.

[0054] In one embodiment, the preset temperature is 300° C.-700° C. Within this range, the oxidation-reduction reaction of the exhaust gas is more complete, and harmful substances in the exhaust gas can be removed to the greatest extent.

[0055] In one embodiment, if Figure 2 and Figure 3 As shown, the shell 1 includes a first shell 11, a second shell 12, a third shell 13, a fourth shell 14 and a fifth shell 15 connected in sequence, the heater 2 is installed in the second shell 12, and the catalyst 3 and the filter 4 are installed in the fourth shell 14.

[0056] By configuring the housing 1 as a segmented structure, it is easier to install the heater 2 , the catalyst 3 , and the filter 4 .

[0057] In one embodiment, if Figure 2 and Figure 3 As shown, the outer wall of the first end of the second shell 12 can be connected to the inner wall of the first shell 11, the outer wall of the second end of the second shell 12 can be connected to the inner wall of the first end of the third shell 11, the outer wall of the first end of the fourth shell 14 can be connected to the inner wall of the second end of the third shell 11, and the outer wall of the second end of the fourth shell 14 can be connected to the inner wall of the fifth shell 11, so as to form the shell 1.

[0058] In one embodiment, if Figure 2 and Figure 3 As shown, the second shell 12 and the fourth shell 14 are both cylindrical, and the axis of the second shell 12 is perpendicular to the axis of the fourth shell 14, forming the shell 1 in a roughly "L"-shaped structure.

[0059] In one embodiment, if Figure 2 and Figure 3 As shown, the inner wall of the third shell 13 may form an inclined surface, which may provide guidance for the flow of the exhaust gas and reduce the noise generated when the exhaust gas in the shell 1 turns to flow.

[0060] In one embodiment, the catalyst 3 is a three-way catalyst, which can catalyze carbon monoxide (CO) and nitrogen oxides (NO x ) and hydrocarbons (C x H y) undergoes redox reactions, and through redox reactions, carbon monoxide, nitrogen oxides, and hydrocarbons are converted into non-toxic or low-toxic substances. Specifically, carbon monoxide can react with oxygen under the action of a three-way catalytic converter to generate carbon dioxide (CO2), nitrogen oxides can react with carbon monoxide under the action of a three-way catalytic converter to be converted into non-toxic nitrogen (N2) and carbon dioxide, and hydrocarbons can be converted into water and carbon dioxide under the action of a three-way catalytic converter. This reaction not only reduces harmful substances in exhaust gas, helps reduce the pollution of the environment by exhaust gas, but also reflects the important role of redox reactions in environmental protection.

[0061] In one embodiment, the filter 4 is a particulate matter trap (PMT for short), which is a ceramic filter that can capture, collect and store particulate matter in the engine exhaust, such as carbon particles or sulfides. Specifically, the particulate trap is mainly aimed at particulate matter generated by incompletely burned fuel, oil combustion and cooling system, etc. By capturing these particulate matter, air pollution is effectively reduced and air quality is improved. Its working principle is similar to the filter of an air purifier, using a special porous material. When exhaust gas containing particulate matter flows through these materials, the particulate matter will be captured and adhere to the surface. Over time, these particulate matter will accumulate and be burned or converted into harmless substances under certain conditions, thereby restoring the filtering effect.

[0062] The use of a particulate filter reduces the amount of particulate matter in exhaust emissions, reducing air pollution. In addition, it also meets stricter emission standards such as the Euro 6 standard in Europe and the ultra-low emission vehicle standard in California, USA. By installing a particulate filter, the safety of the car is also improved, because better combustion efficiency and lower particulate matter emissions can reduce the risk of fire.

[0063] In one embodiment, the size of the housing 1 and the length and diameter of the heater 2, catalyst 3 and filter 4 therein can be changed to adapt to different vehicle model requirements.

[0064] In one embodiment, if Figure 1 and Figure 5 As shown, the shell 1 has an air inlet end and an air outlet end along the flow direction of the exhaust gas, the heater 2 is arranged close to the air inlet end of the shell 1, and the filter 4 is arranged close to the air outlet end of the shell 1.

[0065] In one embodiment, if Figure 1 and Figure 5As shown, the vehicle exhaust treatment mechanism 10 also includes a turbocharger 5, and the air intake end of the housing 1 is connected to the turbocharger 5. The turbocharger 5 is suitable for connecting to the exhaust passage of the engine, so that the housing 1 can be connected to the exhaust passage of the engine through the turbocharger 5, so that the exhaust gas discharged from the exhaust passage of the engine can enter the housing 1.

[0066] The turbocharger 5 is an air compressor that increases the air intake of the housing 1 by compressing the exhaust gas.

[0067] In one embodiment, if Figure 1 and Figure 5 As shown, the vehicle exhaust treatment mechanism 10 also includes a connecting clamp 6, which is connected between the air intake end of the housing 1 and the turbocharger 5 to ensure a sealed connection between the air intake end of the housing 1 and the turbocharger 5, thereby preventing air leakage from occurring at the connection between the air intake end of the housing 1 and the turbocharger 5.

[0068] The vehicle exhaust treatment mechanism 10 provided in the embodiment of the present invention is that at the initial start-up of the vehicle, the engine temperature is low, and the exhaust gas discharged is first heated by the heater 2, and then the high-temperature exhaust gas heated to a preset temperature flows to the catalyst 3 for selective oxidation-reduction reaction, reducing harmful substances that can be oxidized and reduced in the exhaust gas, and finally filtered by the filter 4 to reduce the emission of particulate matter in the exhaust gas. After the engine has been running for a period of time, the exhaust gas discharged from the exhaust channel of the engine will be directly within the rising preset range. At this time, the heater 2 can be turned off, so that the exhaust gas flows directly to the catalyst 3 for oxidation-reduction reaction without heating, and then filtered by the filter 4.

[0069] In addition, if Figure 5 As shown, an embodiment of the present invention further provides a vehicle after-treatment system, which includes an engine 20 and a vehicle exhaust treatment mechanism 10 provided in the above embodiment, wherein the engine 20 is provided with an exhaust passage, and the air intake end of the shell 1 is connected to the exhaust passage, so that the exhaust gas discharged from the exhaust passage of the engine 20 can enter the shell 1.

[0070] When the engine is started, the vehicle after-treatment system no longer needs to use lean burn or delayed ignition and other rapid heating technologies to quickly heat up the exhaust gas generated by the engine combustion. Instead, the exhaust gas is discharged and flows into the housing 1 of the vehicle exhaust treatment mechanism 10, and is first heated by the heater 2, and the exhaust gas is quickly heated by the heater, and then passes through the catalyst 3 and the filter 4, and finally discharged from the exhaust end of the housing 1. Since the heater 2 can heat the exhaust gas to a preset temperature to ensure that the exhaust gas can undergo an oxidation-reduction reaction with the catalyst 3 at the preset temperature, the vehicle exhaust treatment mechanism 10 can effectively remove harmful substances in the exhaust gas even at the initial start-up of the vehicle. In addition, since it is no longer necessary to use lean burn or delayed ignition and other rapid heating technologies, the structure of the engine can be simplified, and the vibration and noise generated by the application of lean burn or delayed ignition and other rapid heating technologies can be reduced, so that the engine can obtain good NVH performance at the initial start-up.

[0071] In one embodiment, if Figure 5 As shown, the engine 20 includes an engine block 201 and an engine cylinder head 202 connected to the engine block 201, the engine block 201 is provided with a first exhaust passage, the engine cylinder head 202 is provided with a second exhaust passage, and the first exhaust passage is connected to the second exhaust passage to form the exhaust channel.

[0072] The air intake end of the housing 1 is communicated with the second exhaust passage through the worm turbocharger 5 .

[0073] The air intake end of the shell 1 is connected to the second exhaust channel, so that the exhaust gas flows out from the first exhaust channel of the engine cylinder block 201 and the second exhaust channel of the engine cylinder head 202 in sequence, flows into the shell 1 from the air intake end of the shell 1 after passing through the worm supercharger 5, and then flows through the heater 2, the catalyst 3 and the filter 4 in sequence, and finally is discharged from the air outlet end of the shell 1 to the outside of the vehicle exhaust treatment mechanism 10.

[0074] In one embodiment, if Figure 5 As shown, the vehicle aftertreatment system also includes a first bracket 30 and a second bracket 40. The first bracket 30 and the second bracket 40 are both used to connect the housing 1 and the engine block 201, so as to fix the housing 1 on the engine block 201 from multiple connection points, and at the same time reduce the vibration and noise generated when the exhaust gas flows.

[0075] In addition, an embodiment of the present invention further provides a vehicle, which includes the vehicle exhaust gas treatment mechanism 10 provided in the above embodiment or includes the vehicle post-treatment system provided in the above embodiment.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle exhaust gas treatment mechanism, characterized in that: The invention comprises a shell, a heater, a catalyst and a filter. The shell is provided with a channel for the exhaust gas discharged by the engine to pass through. The heater, the catalyst and the filter are sequentially arranged in the channel along the flow direction of the exhaust gas. The heater is used to heat the exhaust gas in the channel to a preset temperature. The catalyst is used to perform an oxidation-reduction reaction on the exhaust gas that has reached the preset temperature. The filter is used to filter particulate matter in the exhaust gas.

2. The vehicle exhaust gas treatment mechanism according to claim 1, characterized in that: The heater includes a heating body and a conductor, the conductor is electrically connected to the heating body, the heating body is used to heat the exhaust gas to the preset temperature, and the conductor is suitable for an external power supply.

3. The vehicle exhaust gas treatment mechanism according to claim 2, characterized in that: The heating body is formed by winding a heating sheet, and the winding direction of the heating sheet intersects with the flow direction of the exhaust gas.

4. The vehicle exhaust gas treatment mechanism according to claim 3, characterized in that: When the heating sheet is wound, a spiral gap is formed for the exhaust gas to pass through, and the spiral gap extends along the flow direction of the exhaust gas.

5. The vehicle exhaust gas treatment mechanism according to claim 2, characterized in that: The heating body is formed by winding a resistance wire, and the winding direction of the resistance wire intersects with the flow direction of the exhaust gas.

6. The vehicle exhaust gas treatment mechanism according to claim 5, characterized in that: When the resistance wire is wound, a spiral gap is formed for the exhaust gas to pass through.

7. The vehicle exhaust gas treatment mechanism according to claim 2, characterized in that: The heating body is provided with a plurality of air guide holes extending along the flow direction of the exhaust gas.

8. The vehicle exhaust gas treatment mechanism according to claim 7, characterized in that: A plurality of air guide holes are provided, and the plurality of air guide holes are arranged in a honeycomb shape.

9. The vehicle exhaust gas treatment mechanism according to claim 1, characterized in that: The preset temperature is 300°C-700°C.

10. The vehicle exhaust gas treatment mechanism according to claim 1, characterized in that: The housing includes a first housing, a second housing, a third housing, a fourth housing and a fifth housing which are connected in sequence. The heater is installed in the second housing, and the catalyst and the filter are installed in the fourth housing.

11. The vehicle exhaust gas treatment mechanism according to claim 10, characterized in that: The second shell and the fourth shell are both cylindrical, and the axis of the second shell is perpendicular to the axis of the fourth shell.

12. The vehicle exhaust gas treatment mechanism according to claim 1, characterized in that: The vehicle exhaust gas treatment mechanism further comprises a turbocharger, the air intake end of the housing is connected to the turbocharger, and the turbocharger is suitable for connecting to an exhaust passage of an engine.

13. The vehicle exhaust gas treatment mechanism according to claim 12, characterized in that: The vehicle exhaust gas treatment mechanism also includes a connecting clamp connected between the air intake end of the housing and the turbocharger.

14. A vehicle post-processing system, characterized in that: It comprises an engine and a vehicle exhaust treatment mechanism as claimed in any one of claims 1 to 13, wherein the engine is provided with an exhaust passage, and the air intake end of the shell is connected to the exhaust passage.

15. The vehicle aftertreatment system according to claim 14, characterized in that: The engine comprises an engine cylinder block and an engine cylinder head connected to the engine cylinder block, the engine cylinder block is provided with a first exhaust passage, the engine cylinder head is provided with a second exhaust passage, the first exhaust passage is connected with the second exhaust passage to form the exhaust passage; The air inlet end of the housing is communicated with the second exhaust passage.

16. A vehicle, characterized in that: It includes the vehicle exhaust gas treatment mechanism according to any one of claims 1 to 13 or the vehicle after-treatment system according to claim 14 or 15.

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