Exhaust purification device, exhaust system and vehicle

Abstract

The utility model provides an exhaust purification device, an exhaust system and a vehicle. The exhaust purification device comprises a shell, the shell is provided with a gas inlet end and a gas outlet end, a gas mixing cavity and a gas processing cavity which are communicated with each other are formed in the shell, and the gas mixing cavity is located between the gas processing cavity and the gas inlet end; the purification assembly is arranged in the gas treatment cavity; the baffle is arranged in the gas mixing cavity, a first vent hole and a second vent hole are formed in the baffle, and the area of the first vent hole is larger than that of the second vent hole; the baffle is configured to enable a first part of airflow entering the shell to directly flow through the first vent hole and block a second part of airflow entering the shell, so that the second part of airflow flows through the second vent hole after the flow speed of the second part of airflow is reduced. The baffle can improve the flow velocity uniformity of the exhaust gas, so that the exhaust purification device does not need to be provided with a gas inlet end cone, the space required by the exhaust purification device can be reduced, and the problem that the exhaust purification device is difficult to arrange can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an exhaust purification device, an exhaust system and a vehicle. BACKGROUND

[0002] In order to meet emission requirements, an exhaust purification device is provided in the exhaust system of a vehicle to purify exhaust gas discharged by an engine. The flow uniformity of the exhaust gas when entering the exhaust purification device affects the purification effect. Therefore, some vehicles in the related art are provided with an intake end cone at the intake end of the exhaust purification device. The intake end cone is used to guide the exhaust gas discharged by the engine into the exhaust purification device and to regulate the flow of the exhaust gas, so as to improve the flow uniformity of the exhaust gas.

[0003] However, the provision of the intake end cone also increases the space occupied by the exhaust purification device, which makes it difficult to arrange the exhaust purification device for some vehicle models with relatively compact engine compartment space. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide an exhaust purification device, an exhaust system and a vehicle, which can improve the flow uniformity of exhaust gas while reducing the space required by the exhaust purification device, so as to solve the problem of difficult arrangement of the exhaust purification device.

[0005] The specific technical solutions are as follows:

[0006] In a first aspect, the embodiments of the present application provide an exhaust purification device, which comprises: a shell, the shell being provided with an intake end and an exhaust end, the inside of the shell being provided with a gas mixing cavity and a gas processing cavity which are in communication with each other, the gas mixing cavity being located between the gas processing cavity and the intake end; a purification assembly, the purification assembly being arranged in the gas processing cavity; a baffle, the baffle being arranged in the gas mixing cavity, the baffle being provided with a first air passage and a second air passage, the area of the first air passage being greater than the area of the second air passage; wherein the baffle is configured to make a first part of the flow entering the shell flow directly through the first air passage, and to block a second part of the flow entering the shell, so that the flow rate of the second part of the flow is reduced and then the second part of the flow flows through the second air passage.

[0007] The exhaust purification device in the embodiments of the present application has the baffle with the first air holes and the second air holes arranged in the gas mixing cavity of the shell, so that the exhaust gas can have better flow rate uniformity after passing through the baffle, thereby facilitating improvement of the purification effect of the exhaust purification device. In addition, the baffle is arranged in the interior of the shell, and does not occupy the external space of the exhaust purification device. Since the baffle can improve the flow rate uniformity of the exhaust gas, the exhaust purification device does not need to be provided with an air inlet end cone, so that the space required by the exhaust purification device can be reduced, thereby solving the problem that the exhaust purification device is difficult to arrange. For some vehicle models with relatively compact engine compartment space arrangement, the installation difficulty of the exhaust purification device can be reduced.

[0008] In some embodiments of the present application, the area of the first air hole is S1, and the area of the second air hole is S2, wherein 0.1S1≤S2≤0.3S1.

[0009] The area S2 of the second air hole is set to 10% to 30% of the area S1 of the first air hole, which can make the baffle have a better blocking effect on high-speed airflow, so as to facilitate a decrease in the flow rate of high-speed airflow, thereby achieving the effect of improving the flow rate uniformity of the exhaust gas, while also ensuring the overall passing efficiency of the exhaust gas, and further ensuring the purification efficiency of the exhaust purification device.

[0010] In some embodiments of the present application, the number of the first air holes is greater than or equal to 1 and less than or equal to 3. In this way, the exhaust gas treatment requirements of most vehicle models and most working conditions can be met.

[0011] In some embodiments of the present application, the sum of the areas of all the first air holes is less than or equal to 40% of the total area of the baffle. The sum of the areas of the first air holes is not more than 40% of the total area of the baffle, so that the area of the first air hole matches the distribution of low-speed airflow.

[0012] In some embodiments of the present application, the baffle is welded to the inner wall of the shell. This arrangement has a relatively simple structure, and is conducive to reducing the manufacturing cost of the exhaust purification device.

[0013] In some embodiments of the present application, the exhaust purification device further comprises a driving mechanism, the driving mechanism is connected with the baffle, and the driving mechanism is used to drive the baffle to rotate relative to the shell.

[0014] The driving mechanism can drive the baffle to rotate, so that the positions of the first air holes and the second air holes in the vehicle are adjustable. In this way, when the vehicle is in different operating conditions, the angle of the baffle can be adjusted, and the distribution of the first air holes and the second air holes can be changed, so that the baffle can better improve the flow rate uniformity of the exhaust gas in various working conditions.

[0015] In some embodiments of the present application, the driving mechanism comprises a motor and a transmission assembly, the motor is fixed to the inner wall of the shell, the transmission assembly comprises a gear and a ring gear, the gear is connected with the rotating shaft of the motor, the ring gear is connected with the baffle, and the gear is engaged with the ring gear.

[0016] When the motor is working, the rotating shaft of the motor drives the gear to rotate, the gear drives the ring gear engaged with the gear to rotate, so that the baffle connected with the ring gear rotates. In this way, the baffle can be driven to rotate by the motor through the gear and the ring gear, and the positions of the first air hole and the second air hole can be adjusted.

[0017] In some embodiments of the present application, the edge of the baffle is provided with a sealing part, and the sealing part is in contact with the inner wall of the shell. In this way, the sealing property between the baffle and the inner wall of the shell can be improved, and the exhaust gas can be prevented from entering the gas treatment cavity through the gap between the baffle and the inner wall of the shell.

[0018] In some embodiments of the present application, the purification assembly comprises a first purification unit and a second purification unit arranged at intervals, and the first purification unit is located on the side of the second purification unit close to the gas mixing cavity. By arranging the first purification unit and the second purification unit in the gas treatment cavity, the exhaust gas of the engine can be better purified.

[0019] In a second aspect, the embodiments of the present application provide an exhaust system, comprising: a turbocharger; and the exhaust purification device in any of the above embodiments, the turbocharger is connected with the gas inlet end of the exhaust purification device.

[0020] The exhaust system provided by the embodiments of the present application is based on the same inventive concept as the purification treatment device in the above embodiments, and therefore, the exhaust system provided by the embodiments of the present application can have the features and corresponding beneficial effects of the purification treatment device in the above embodiments.

[0021] In a third aspect, the embodiments of the present application provide a vehicle, comprising the exhaust system in any of the above embodiments.

[0022] The vehicle provided by the embodiments of the present application is based on the same inventive concept as the exhaust system in the above embodiments, and therefore, the vehicle provided by the embodiments of the present application can have the features and corresponding beneficial effects of the exhaust system in the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structural schematic diagram of the exhaust system provided by an embodiment of the present application is shown in the figure;

[0024] Figure 2Structure schematic diagram of exhaust purification device provided by an embodiment of the present application (with exhaust pipe);

[0025] Figure 3 Structure schematic diagram of exhaust purification device provided by an embodiment of the present application (with exhaust pipe) from another perspective;

[0026] Figure 4 Structure schematic diagram of exhaust purification device provided by an embodiment of the present application (with exhaust pipe) from another perspective;

[0027] Figure 5 Structure schematic diagram of A-A section of the exhaust purification device; Figure 4 Structure schematic diagram of B-B section of the exhaust purification device; Structure schematic diagram of C-C section of the exhaust purification device;

[0028] Structure schematic diagram of D-D section of the exhaust purification device; Figure 6 Gas flow velocity distribution diagram of engine exhaust gas of a certain vehicle model entering the intake end of the exhaust purification device;

[0029] Figure 7 Structure schematic diagram of exhaust purification device provided by an embodiment of the present application;

[0030] Figure 8 Structure schematic diagram of turbocharger provided by an embodiment of the present application.

[0031] Explanation of reference numerals in the drawing is as follows:

[0032] 10, exhaust system;

[0033] 100, exhaust purification device;

[0034] 110, housing; 111, intake end; 112, exhaust end; 113, gas mixing cavity; 114, gas processing cavity; 115, first connecting flange;

[0035] 120, purification assembly; 121, first purification unit; 122, second purification unit;

[0036] 130, baffle; 131, first air hole; 132, second air hole;

[0037] 140, driving mechanism; 141, motor; 142, gear; 143, gear ring;

[0038] 200, turbocharger; 210, second connecting flange;

[0039] 300, clamp;

[0040] 400, exhaust pipe; 410, corrugated section; 420, third connecting flange;

[0041] 500, first oxygen sensor;

[0042] 600. A second oxygen sensor. DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0044] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0045] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as implying or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0046] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0048] In order to meet emission requirements, an exhaust purification device is provided in an exhaust system of a vehicle to purify exhaust gas discharged by an engine. The flow uniformity of the exhaust gas when entering the exhaust purification device affects the purification effect, and therefore some vehicles in the related art are provided with an intake end cone at the intake end of the exhaust purification device. The intake end cone is used to introduce the exhaust gas discharged by the engine into the exhaust purification device and to regulate the flow of the exhaust gas, so as to improve the flow uniformity of the exhaust gas.

[0049] However, the provision of the intake end cone also increases the space occupied by the exhaust purification device, which makes it difficult to arrange the exhaust purification device for some vehicle models with relatively compact engine compartment space.

[0050] Based on the above, the first aspect of the embodiments of the present application provides an exhaust purification device, which aims to improve the flow uniformity of the exhaust gas while reducing the space required by the exhaust purification device, so as to solve the problem of difficult arrangement of the exhaust purification device.

[0051] Figure 1 A structural schematic diagram of an exhaust system according to an embodiment of the present application is provided; Figure 2 A structural schematic diagram of an exhaust purification device according to an embodiment of the present application is provided (with an exhaust pipe); Figure 3 A structural schematic diagram of an exhaust purification device according to an embodiment of the present application is provided (with an exhaust pipe); Figure 4 A structural schematic diagram of an exhaust purification device according to an embodiment of the present application is provided (with an exhaust pipe); Figure 5 A structural schematic diagram of an exhaust purification device according to an embodiment of the present application is provided (with an exhaust pipe); Figure 4 A structural schematic diagram of an exhaust purification device according to an embodiment of the present application is provided (with an exhaust pipe);

[0052] As shown in Figures 1 to 5 The exhaust purification device 100 provided by the embodiments of the present application includes a housing 110, a purification assembly 120, and a baffle 130. Specifically, the housing 110 is provided with an intake end 111 and an exhaust end 112, and the inside of the housing 110 is provided with a gas mixing cavity 113 and a gas processing cavity 114 that are in communication with each other, and the gas mixing cavity 113 is located between the gas processing cavity 114 and the intake end 111. The purification assembly 120 is arranged in the gas processing cavity 114, and the baffle 130 is arranged in the gas mixing cavity 113. The baffle 130 is provided with a first air hole 131 and a second air hole 132, and the area of the first air hole 131 is greater than the area of the second air hole 132. The baffle 130 is configured to make a first part of the gas flow entering the housing 110 flow directly through the first air hole 131, and to block a second part of the gas flow entering the housing 110, so that the second part of the gas flow flows through the second air hole 132 after the flow rate is reduced.

[0053] Specifically, the exhaust gas discharged by the engine can enter the inside of the casing 110 through the intake end 111, pass through the gas mixing chamber 113 and the gas treatment chamber 114 in sequence, and in the process of passing through the gas treatment chamber 114, the purification assembly 120 performs purification treatment on the exhaust gas to remove pollutants in the exhaust gas. Among them, the purification assembly 120 can remove pollutants in the exhaust gas by chemical reaction and / or physical adsorption. The exhaust gas after purification treatment finally leaves the casing 110 through the exhaust end 112.

[0054] Generally, the exhaust gas contains multiple gas streams with different flow rates, which means that the flow rate uniformity of the exhaust gas entering the exhaust gas purification device 100 is poor. The flow rate uniformity will affect the purification effect of the exhaust gas, that is, improving the flow rate uniformity of the exhaust gas can improve the purification effect of the exhaust gas.

[0055] In this embodiment, the role of the baffle 130 located in the gas mixing chamber 113 is to improve the flow rate uniformity of the exhaust gas. Specifically, the baffle 130 is provided with a first air hole 131 and a second air hole 132, the area of the first air hole 131 is larger than the area of the second air hole 132, wherein the first air hole 131 is used for the gas stream with small speed to pass directly, and the area of the baffle 130 other than the first air hole 131 is mainly used for blocking the gas stream with large speed, that is, the gas stream with large speed is blocked and the flow rate is reduced, and then enters the gas treatment chamber 114 through the second air hole 132. In this way, the exhaust gas has good flow rate uniformity after passing through the baffle 130.

[0056] It can be understood that for a certain vehicle model, the flow rate distribution of the exhaust gas of the engine entering the intake end 111 of the exhaust gas purification device 100 can be obtained by test and simulation means. For example, Figure 6 The figure is the gas flow rate distribution of the exhaust gas of the engine of a certain vehicle model entering the intake end 111 of the exhaust gas purification device 100, which is obtained by simulation of a certain vehicle model. After obtaining the flow rate distribution, the high-speed gas stream and the low-speed gas stream can be defined with reference to the preset speed value, for example, the flow rate greater than the preset speed value is defined as the high-speed gas stream, and the flow rate less than the preset speed value is defined as the low-speed gas stream. In this way, the distribution of the high-speed gas stream and the low-speed gas stream can be obtained. According to the distribution of the high-speed gas stream and the low-speed gas stream, the first air hole 131 and the second air hole 132 can be designed on the baffle 130. Specifically, the first air hole 131 with a larger area is arranged at the position where the low-speed gas stream is distributed, so that the low-speed gas stream can pass through the first air hole 131 directly, and the second air hole 132 with a smaller area is arranged at the position where the high-speed gas stream is distributed, so that the high-speed gas stream is blocked by the baffle 130 and the flow rate is reduced, and then passes through the second air hole 132.

[0057] The exhaust purification device 100 in the embodiments of the present application has the baffle 130 with the first air hole 131 and the second air hole 132 arranged in the gas mixing cavity 113 of the shell 110, so that the exhaust gas has better flow rate uniformity after passing through the baffle 130, thereby facilitating improvement of the purification effect of the exhaust purification device 100. In addition, the baffle 130 is arranged inside the shell 110, and does not occupy the external space of the exhaust purification device 100. Since the baffle 130 can improve the flow rate uniformity of the exhaust gas, the exhaust purification device 100 does not need to be installed with the air inlet end 111 cone, so that the space required by the exhaust purification device 100 can be reduced, thereby solving the problem that the exhaust purification device 100 is difficult to arrange. For some vehicle models with relatively compact engine compartment space arrangement, the installation difficulty of the exhaust purification device 100 can be reduced.

[0058] As shown in Figure 2 , Figure 3 In some embodiments, the area of the first air hole 131 is S1, and the area of the second air hole 132 is S2, where 0.1S1≤S2≤0.3S1.

[0059] If the area S2 of the second air hole 132 is too large, the high-speed airflow will directly pass through the second air hole 132, so that the baffle 130 has poor blocking effect on the high-speed airflow, which makes it difficult to improve the flow rate uniformity of the exhaust gas. Conversely, if the area S2 of the second air hole 132 is too small, the passing efficiency of the exhaust gas is low, thereby affecting the purification efficiency of the exhaust purification device 100.

[0060] Through a large number of tests and simulation verifications, the area S2 of the second air hole 132 is set to 10% to 30% of the area S1 of the first air hole 131, which can make the baffle 130 have a good blocking effect on the high-speed airflow, so as to reduce the flow rate of the high-speed airflow, thereby improving the flow rate uniformity of the exhaust gas, and at the same time, the overall passing efficiency of the exhaust gas can be ensured, thereby ensuring the purification efficiency of the exhaust purification device 100.

[0061] In some embodiments, the number of first air holes 131 is greater than or equal to 1 and less than or equal to 3. The applicant has carried out a large number of research work for different vehicle models and different working conditions of the same vehicle model, and found that low-speed airflow is usually distributed in 1 to 3 regions. Therefore, the number of first air holes 131 can be set to 1 to 3, which can meet the exhaust gas treatment requirements of most vehicle models and most working conditions.

[0062] In some embodiments, the sum of the areas of all first vents 131 is less than or equal to 40% of the total area of ​​the baffle 130. Applicants have found that the distribution area of ​​low-speed airflow in the exhaust gas entering the exhaust purification device 100 does not exceed 40%. Therefore, the sum of the areas of the first vents 131 is preferably not more than 40% of the total area of ​​the baffle 130, so that the area of ​​the first vents 131 matches the distribution of the low-speed airflow.

[0063] like Figure 3 、 Figure 5 As shown, in one embodiment, baffle 130 is welded to the inner wall of housing 110. In this embodiment, baffle 130 is fixed relative to housing 110, meaning that the positions of first vent 131 and second vent 132 remain fixed within the vehicle. This arrangement simplifies the structure and helps reduce the manufacturing cost of exhaust purification device 100.

[0064] It is understandable that the flow velocity distribution of the exhaust gas may be different under different operating conditions of the vehicle. The first air vent 131 and the second air vent 132 on the baffle 130 can be designed based on the main operating condition of the vehicle (such as constant speed driving condition) and the flow velocity distribution of the exhaust gas under this condition.

[0065] like Figure 7 As shown, in another embodiment, the exhaust purification device 100 further includes a driving mechanism 140, which is connected to the baffle 130 and is used to drive the baffle 130 to rotate relative to the housing 110. In this embodiment, the driving mechanism 140 is capable of driving the baffle 130 to rotate, which makes the positions of the first vent 131 and the second vent 132 in the vehicle adjustable. In this way, when the vehicle is in different operating conditions, the angle of the baffle 130 can be adjusted to change the distribution of the first vent 131 and the second vent 132, so that the baffle 130 can better play the role of improving the uniformity of the flow rate of the exhaust gas under various operating conditions.

[0066] For example, the flow velocity distribution of the exhaust gas when entering the exhaust purification device 100 under different working conditions can be obtained in advance. In this way, when the vehicle is driving, the angle of the baffle 130 is adjusted according to the current working condition of the vehicle, so that the positions of the first air vent 131 and the second air vent 132 are matched as much as possible with the flow velocity distribution of the exhaust gas under the current working condition.

[0067] Furthermore, the driving mechanism 140 may include a motor 141 and a transmission assembly, the motor 141 is fixed to the inner wall of the shell 110, the transmission assembly includes a gear 142 and a ring gear 143, the gear 142 is connected to the rotating shaft of the motor 141, the ring gear 143 is connected to the baffle 130, and the gear 142 and the ring gear 143 are meshed.

[0068] When the motor 141 is in operation, the rotating shaft of the motor 141 drives the gear 142 to rotate, and the gear 142 drives the gear ring 143 to rotate, so that the baffle 130 connected with the gear ring 143 rotates. In this way, the baffle 130 can be driven to rotate by the motor 141 through the gear 142 and the gear ring 143, and the positions of the first air hole 131 and the second air hole 132 can be adjusted.

[0069] In one embodiment, the edge of the baffle 130 is provided with a sealing part (not shown in the figure), which is in contact with the inner wall of the shell 110. For example, a sealing strip can be arranged around the edge of the baffle 130. In this way, the sealing between the baffle 130 and the inner wall of the shell 110 can be improved, and the exhaust gas can be prevented from entering the gas treatment cavity 114 through the gap between the baffle 130 and the inner wall of the shell 110.

[0070] As shown in Figure 5 In some embodiments, the purification assembly 120 includes a first purification unit 121 and a second purification unit 122 arranged at intervals, and the first purification unit 121 is located on the side of the second purification unit 122 close to the gas mixing cavity 113.

[0071] The first purification unit 121 and the second purification unit 122 can be purification units with different structures and / or different functions. For example, the first purification unit 121 can be a catalytic conversion unit, which is mainly used to convert harmful gases such as carbon monoxide, hydrocarbons and nitrogen oxides into harmless carbon dioxide, water and nitrogen through oxidation-reduction. The second purification unit 122 can be a particulate matter trapping unit for trapping particulate matter in organic exhaust gas.

[0072] By arranging the first purification unit 121 and the second purification unit 122 in the gas treatment cavity 114, the exhaust gas of the engine can be better purified.

[0073] As shown in Figure 1 The embodiment of the second aspect of the application provides an exhaust system 10, which includes a turbocharger 200 and the exhaust purification device 100 of any of the above embodiments, and the turbocharger 200 is connected with the air inlet end 111 of the exhaust purification device 100. That is, the turbocharger is directly connected with the air inlet end 111 of the exhaust purification device 100, rather than being connected with the exhaust purification device 100 through the air inlet end 111 cone.

[0074] The exhaust gas discharged by the engine can be supplied to the turbocharger 200 through the exhaust manifold, and the exhaust gas discharged by the turbocharger 200 is further supplied to the exhaust purification device 100 for purification treatment in the exhaust purification device 100.

[0075] The exhaust system 10 provided by the embodiments of the present application has the same inventive concept as the purification treatment device in the above embodiments, and therefore, the exhaust system 10 provided by the embodiments of the present application can have the features and corresponding beneficial effects of the purification treatment device in the above embodiments.

[0076] As shown in Figure 1 , in some embodiments, the turbocharger 200 is connected with the air inlet end 111 of the shell 110 through the clamp 300, so that the two are conveniently connected and can ensure good connection stability after connection.

[0077] As shown in Figure 1 , Figure 2 and Figure 8 , further, the air inlet end 111 of the shell 110 can be provided with a first connecting flange 115, and correspondingly, the exhaust port of the turbocharger 200 is provided with a second connecting flange 210, so that in the case of abutting of the first connecting flange 115 and the second connecting flange 210, the first connecting flange 115 and the second connecting flange 210 are fastened together through the clamp 300, so as to facilitate ensuring the sealing property of the connection position.

[0078] As shown in Figure 1 , in some embodiments, the exhaust system 10 further comprises an exhaust pipe 400, which is connected with the exhaust end 112 of the shell 110. The exhaust pipe 400 can comprise a corrugated section 410, so that by adjusting the length of the corrugated section 410, the tail end position of the exhaust pipe 400 can be adjusted.

[0079] As shown in Figure 1 , Figure 2 , further, one end of the exhaust pipe 400 away from the shell 110 is provided with a third connecting flange 420, which is used for fixing the tail end of the exhaust pipe 400, i.e., the tail end of the exhaust pipe 400 can be fixed to other structures of the vehicle through the third connecting flange 420, so as to improve the stability of the exhaust pipe 400.

[0080] As shown in Figure 1 , in some embodiments, the exhaust system 10 further comprises a first oxygen sensor 500 and a second oxygen sensor 600, the first oxygen sensor 500 is arranged at the exhaust port position of the turbocharger 200, and the second oxygen sensor 600 is arranged at the shell 110, for example, after the second purification unit 122 or between the first purification unit 121 and the second purification unit 122. The first oxygen sensor 500 and the second oxygen sensor 600 can be used to monitor the oxygen concentration in the exhaust gas before and after purification treatment, so as to evaluate the purification effect.

[0081] The embodiments of the second aspect of the present application provide a vehicle, the vehicle comprising the exhaust system 10 in any of the above embodiments.

[0082] The vehicle provided by the embodiments of the present application is based on the same inventive concept as the exhaust system 10 in the above embodiments, and therefore, the vehicle provided by the embodiments of the present application can have the features and corresponding beneficial effects of the exhaust system 10 in the above embodiments.

[0083] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An exhaust gas purification apparatus characterized by comprising: The exhaust gas purification device comprises: a shell, which is provided with an air inlet end and an air outlet end, and an internal space of the shell is provided with a gas mixing chamber and a gas treatment chamber which are in communication with each other, and the gas mixing chamber is located between the gas treatment chamber and the air inlet end; a purification assembly, which is arranged in the gas treatment chamber; a baffle, which is arranged in the gas mixing chamber, and the baffle is provided with a first air passage hole and a second air passage hole, and an area of the first air passage hole is greater than an area of the second air passage hole; wherein the baffle is configured to make a first part of the gas flow entering the shell directly flow through the first air passage hole, and to block a second part of the gas flow entering the shell, so that the second part of the gas flow flows through the second air passage hole after the flow rate thereof is reduced.

2. The exhaust purification apparatus according to claim 1, characterized by The area of the first air passage hole is S1, and the area of the second air passage hole is S2, wherein 0.1S1≤S2≤0.3S1.

3. The exhaust purification apparatus according to claim 1, characterized by The number of the first air passage holes is greater than or equal to 1 and less than or equal to 3. And / or, the sum of the areas of all the first air passage holes is less than or equal to 40% of the total area of the baffle.

4. The exhaust purification apparatus according to claim 1, characterized by The baffle is welded to the inner wall of the shell.

5. The exhaust purification apparatus according to claim 1, characterized by The exhaust gas purification device further comprises a driving mechanism, which is connected with the baffle and is used to drive the baffle to rotate relative to the shell.

6. The exhaust purification apparatus according to claim 5, characterized by The driving mechanism comprises a motor and a transmission assembly, the motor is fixed to the inner wall of the shell, the transmission assembly comprises a gear and a ring gear, the gear is connected with a rotating shaft of the motor, the ring gear is connected with the baffle, and the gear is engaged with the ring gear.

7. The exhaust purification apparatus according to claim 5, characterized by An edge of the baffle is provided with a sealing part, which is in contact with the inner wall of the shell.

8. The exhaust purification apparatus according to claim 1, characterized by The purification assembly comprises a first purification unit and a second purification unit which are arranged at intervals, and the first purification unit is located on a side of the second purification unit which is close to the gas mixing chamber.

9. An exhaust system characterized by, The exhaust gas purification device comprises: a turbocharger; and The exhaust gas purification device according to any one of claims 1 to 8, and the turbocharger is connected with the air inlet end of the exhaust gas purification device. The exhaust system comprising the exhaust gas purification device according to claim 9.

10. A vehicle characterized by comprising: The exhaust system comprising the exhaust gas purification device according to claim 9.

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