Engine tail gas aftertreatment device and vehicle

Abstract

The invention discloses an engine tail gas after-treatment device and a vehicle, the engine tail gas after-treatment device comprises a solid ammonia storage unit, a silencer and a gas inlet pipe, a solid ammonia storage tank is installed in the solid ammonia storage unit, the solid ammonia storage unit is provided with a first tail gas inlet and a tail gas outlet, and the silencer is provided with a second tail gas inlet; the gas inlet pipe is communicated with the engine tail gas outlet, the first tail gas inlet and the second tail gas inlet, the flow of tail gas entering the first tail gas inlet is adjustable, and the connecting pipe is communicated with the tail gas outlet and the second tail gas inlet. According to the invention, all the tail gas for heating the solid ammonia storage tank or the tail gas not flowing through the solid ammonia storage tank can enter the silencer in a stable state, and is exhausted into the atmosphere after noise reduction is completed, so that the tail gas emission is more regular, the stability of noise emission is improved, and the noise emission is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of engine exhaust systems, and in particular to an engine exhaust after-treatment device and a vehicle. Background Art

[0002] At present, with the increasing prominence of global environmental pollution and energy crisis, people's awareness of environmental protection and reducing energy consumption is also increasing, and pollutants emitted from automobile exhaust are one of the main causes of environmental pollution.

[0003] In the field of gasoline engines, lean-burn engines are one of the effective ways to reduce energy consumption and improve fuel economy. However, while reducing energy consumption, lean-burn engines will produce too much NOx (nitrogen oxides) harmful substances, making it impossible for existing post-treatment technologies to effectively purify NOx in engine exhaust, resulting in lean-burn engine emissions failing to meet increasingly stringent regulatory requirements. To this end, it is necessary to add additional ammonia to the exhaust gas. Under the action of the SCR (selective catalytic reduction converter), ammonia reacts with NOx in the exhaust gas to convert harmful gas NOx into harmless nitrogen and water. In the existing post-treatment scheme, ammonia is stored on the vehicle in the form of urea solution and solid ammonia storage tanks. When ammonia is needed, the urea solution is sprayed into the post-treatment system, and then hydrolyzes in the high-temperature exhaust gas to release ammonia. However, this form has the risk of urea crystallization, which can cause exhaust pipe blockage in severe cases, resulting in reduced engine power performance. Solid ammonia storage tanks do not have this defect, because after being heated, they directly release ammonia gas, and when needed, they directly inject ammonia gas into the exhaust pipe of the after-treatment system without the risk of crystallization. Therefore, in the after-treatment technology of lean-burn engines, the use of solid ammonia storage tanks is one of the preferred technical solutions at present.

[0004] In the existing technical solution, the solid ammonia storage tank is usually connected in parallel with the exhaust pipe in the post-treatment system, and two exhaust tail pipes are set. One is behind the solid ammonia storage tank, and the other is behind the muffler. Such a setting has the following defects: when the high-temperature exhaust gas heats the solid ammonia storage tank, the exhaust gas is discharged from the solid ammonia storage tank and the muffler at the same time. When the solid ammonia storage tank does not need to be heated by high-temperature exhaust gas, the exhaust gas is all discharged from the muffler; this will cause the post-treatment system to discharge exhaust gas irregularly and intermittently, thereby reducing the stability of the emission noise; in addition, since the exhaust gas passes through the solid ammonia storage tank, it is directly discharged into the atmosphere without noise reduction through the muffler, which worsens the emission noise. Summary of the invention

[0005] The purpose of the present invention is to provide an engine exhaust after-treatment device to improve the stability of emission noise and reduce emission noise.

[0006] In order to solve the above technical problems, the present invention provides an engine exhaust after-treatment device, including a solid ammonia storage unit, a muffler and an intake pipe, wherein a solid ammonia storage tank is installed inside the solid ammonia storage unit, the solid ammonia storage unit has a first exhaust gas inlet and a first exhaust gas outlet, the muffler has a second exhaust gas inlet, the intake pipe connects the engine exhaust outlet, the first exhaust gas inlet and the second exhaust gas inlet, and the exhaust gas flow entering the first exhaust gas inlet is adjustable, and also includes a connecting pipe, the connecting pipe connects the first exhaust gas outlet and the second exhaust gas inlet.

[0007] In the engine exhaust after-treatment device of the present invention, the intake pipe connects the engine exhaust outlet, the first exhaust inlet and the second exhaust inlet, and the exhaust flow rate entering the first exhaust inlet is adjustable. Specifically, the exhaust flow rate entering the first exhaust inlet can be adjusted according to the ammonia pressure value in the solid ammonia storage tank. For example, when the ammonia pressure in the solid ammonia storage tank is greater than the set value, the solid ammonia storage tank does not need to be heated to release ammonia. At this time, the exhaust flow rate entering the first exhaust inlet is adjusted to zero, and all the exhaust gas does not pass through the solid ammonia storage tank, but directly enters the muffler for noise reduction before being discharged into the atmosphere; and when the ammonia pressure in the solid ammonia storage tank is less than the set value, the exhaust flow rate entering the first exhaust inlet can be increased, so that part or all of the high-temperature exhaust gas enters the first exhaust inlet, the solid ammonia storage tank is heated, and more ammonia is released. The exhaust gas after the solid ammonia storage tank is heated will enter the connecting pipe through the first exhaust outlet, and finally merge with the remaining exhaust that has not passed through the solid ammonia storage tank, flow into the muffler for noise reduction, and then be discharged into the atmosphere.

[0008] It can be seen that in the engine exhaust after-treatment device of the present invention, by actively controlling the exhaust gas flow rate flowing into the solid ammonia storage unit, it is possible to ensure that the internal temperature of the solid ammonia storage unit reaches the ideal temperature required for the solid ammonia storage tank to release ammonia; and the exhaust gas that heats the solid ammonia storage tank, or the exhaust gas that does not flow through the solid ammonia storage tank can all enter the muffler in a stable state, and be discharged into the atmosphere after completing the noise reduction. The exhaust gas emission is more regular, thereby improving the stability of the emission noise and reducing the emission noise.

[0009] Optionally, the air intake pipe is a three-way connecting pipe, and three connecting ends of the three-way connecting pipe are respectively connected to the engine exhaust outlet, the first exhaust inlet, and the second exhaust inlet;

[0010] It also includes a control valve, which is arranged at the intersection of the three-way connecting pipe. The control valve can adjust the exhaust gas flow entering the first exhaust gas inlet according to the ammonia pressure value in the solid ammonia storage tank.

[0011] Optionally, the three-way connecting pipe includes a first pipeline, a free end of the first pipeline is connected to the engine exhaust outlet, a mixer and a selective catalytic reduction converter are arranged on the first pipeline, and the mixer is located at the front side of the selective catalytic reduction converter.

[0012] The solid ammonia storage unit has an ammonia outlet and also includes an ammonia pipe, one end of which is connected to the ammonia outlet, and the other end of which is connected to the first pipeline, and the connection position between the ammonia pipe and the first pipeline is located on the front side of the mixer.

[0013] Optionally, the solid ammonia storage unit comprises a sealed shell, the solid ammonia storage tank is encapsulated inside the sealed shell, and the inside of the sealed shell and the outer periphery of the solid ammonia storage tank form an external heating chamber;

[0014] The solid ammonia storage tank has an internal heating chamber, the internal heating chamber has an air inlet and an air outlet, the air inlet is connected to the first exhaust gas inlet, the air outlet is connected to the external heating chamber, and the first exhaust gas outlet is connected to the external heating chamber.

[0015] Optionally, a first baffle is further provided inside the sealed shell, and the first baffle divides the inside of the sealed shell into a first cavity and a second cavity, the first cavity forms an air intake cavity, the second cavity forms the external heating cavity, the air intake cavity is provided with the first exhaust gas inlet, the solid ammonia storage tank passes through the first baffle and is sealed along the circumferential direction, and the air inlet is connected to the air intake cavity.

[0016] Optionally, a second baffle is further provided inside the sealed shell, the second baffle is arranged opposite to the first baffle, the solid ammonia storage tank passes through the second baffle, and the second baffle is provided with a through hole.

[0017] Optionally, the solid ammonia storage tank can be detachably passed through the first baffle and the second baffle, the ammonia pipe can be detachably connected to the ammonia outlet, and the sealed shell includes a shell body and an end cover, one end of the shell body is open, and the end cover can be detachably installed on the open end of the shell body.

[0018] Optionally, the solid ammonia storage tank is provided with a handle on the end wall facing the open end of the shell body.

[0019] Optionally, a tail pipe is further included, the muffler has a second exhaust gas outlet, and the tail pipe is connected to the second exhaust gas outlet.

[0020] The present invention also provides a vehicle, comprising the above-mentioned engine exhaust after-treatment device.

[0021] The vehicle of the present invention includes the aforementioned engine exhaust after-treatment device, and therefore has the same technical effects as the aforementioned engine exhaust after-treatment device, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a specific embodiment of the engine exhaust after-treatment device provided by the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the engine exhaust aftertreatment device in the first position;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the engine exhaust aftertreatment device in the second position;

[0025] Figure 4 for Figure 1 A schematic diagram of the structure of the engine exhaust aftertreatment device in the third position;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the solid ammonia storage tank in the engine exhaust after-treatment device when it is disassembled;

[0027] in, Figure 1-Figure 5 The reference numerals in the figures are described as follows:

[0028] 1-solid ammonia storage unit; 11-solid ammonia storage tank; 11a-internal heating chamber; 111-handle; 1a-first exhaust gas inlet; 1b-first exhaust gas outlet; 12-sealed housing; 121-housing body; 122-end cover; 13-first baffle; 14-second baffle;

[0029] 2-muffler; 2a-second exhaust gas inlet;

[0030] 3-intake pipe; 31-first pipeline;

[0031] 4-Connecting pipe;

[0032] 5-Control valve;

[0033] 6-Mixer;

[0034] 7-Selective catalytic reduction converter;

[0035] 8- Ammonia pipe;

[0036] 9-Tail pipe. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The “plurality” mentioned herein generally means more than two; and when “plurality” is used to indicate the number of certain components, it does not indicate the relationship between the quantities of these components.

[0039] Please refer to Figure 1-Figure 3 , Figure 1 A schematic structural diagram of a specific embodiment of the engine exhaust after-treatment device provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the engine exhaust aftertreatment device in the first position; Figure 3 for Figure 1 A schematic diagram of the structure of the engine exhaust aftertreatment device in the second position;

[0040] Figure 4 for Figure 1 Schematic diagram of the structure of the engine exhaust aftertreatment device in the third position.

[0041] The present invention provides an engine exhaust aftertreatment device, comprising a solid ammonia storage unit 1, a muffler 2 and an intake pipe 3, wherein a solid ammonia storage tank 11 is installed inside the solid ammonia storage unit 1, the solid ammonia storage unit 1 has a first exhaust inlet 1a and a first exhaust outlet 1b, the muffler 2 has a second exhaust inlet 2a, the intake pipe 3 connects the engine exhaust outlet, the first exhaust inlet 1a and the second exhaust inlet 2a, and the exhaust flow entering the first exhaust inlet 1a is adjustable, and also includes a connecting pipe 4, which connects the first exhaust outlet 1b and the second exhaust inlet 2a.

[0042] In the engine exhaust after-treatment device of the present invention, the intake pipe 3 is connected to the engine exhaust outlet, the first exhaust inlet 1a and the second exhaust inlet 2a, and the exhaust flow rate entering the first exhaust inlet 1a is adjustable. Specifically, the exhaust flow rate entering the first exhaust inlet 1a can be adjusted according to the ammonia pressure value in the solid ammonia storage tank 11. For example, when the ammonia pressure in the solid ammonia storage tank 11 is greater than the set value, the solid ammonia storage tank 11 does not need to be heated to release ammonia. At this time, the exhaust flow rate entering the first exhaust inlet 1a is adjusted to zero, and all the exhaust does not pass through the solid ammonia storage tank 11, but directly enters the muffler 2 for noise reduction and then is discharged into the atmosphere. Figure 2 When the ammonia pressure in the solid ammonia storage tank 11 is less than the set value, the exhaust gas flow rate entering the first exhaust gas inlet 1a can be increased so that part or all of the high-temperature exhaust gas enters the first exhaust gas inlet 1a, thereby heating the solid ammonia storage tank 10 and accelerating the release of more ammonia. Figure 3 and Figure 4As shown, the exhaust gas after heating the solid ammonia storage tank 10 will enter the connecting pipe 4 through the first exhaust gas outlet 1b, and finally merge with the remaining exhaust gas that has not flowed through the solid ammonia storage tank 10, flow into the muffler 2 for noise reduction, and then be discharged into the atmosphere.

[0043] It can be seen that in the engine exhaust after-treatment device of the present invention, by actively controlling the exhaust gas flow rate flowing into the solid ammonia storage unit 1, it is possible to ensure that the internal temperature of the solid ammonia storage unit 1 reaches the ideal temperature required for the solid ammonia storage tank 11 to release ammonia; and the exhaust gas heated by the solid ammonia storage tank 10 and the exhaust gas that does not flow through the solid ammonia storage tank 10 can all enter the muffler 2 in a stable state, and be discharged into the atmosphere after completing the noise reduction. The exhaust gas emission is more regular, thereby improving the stability of the emission noise and reducing the emission noise.

[0044] In this embodiment, the air intake pipe 3 is a three-way connecting pipe, and the three connecting ends of the three-way connecting pipe are respectively connected to the engine exhaust outlet, the first exhaust inlet 1a, and the second exhaust inlet 2a;

[0045] It also includes a control valve 5, which is arranged at the intersection of the three-way connecting pipe. The control valve 5 can adjust the exhaust gas flow entering the first exhaust gas inlet 1a according to the ammonia pressure value in the solid ammonia storage tank 11.

[0046] It can be understood that in actual applications, a pressure sensor should be provided inside the solid ammonia storage tank 11 to detect the ammonia pressure value in the solid ammonia storage tank 11. The engine exhaust after-treatment device is also provided with a controller, and the controller is electrically connected to the pressure sensor and the control valve 5. The controller can receive the detection result of the pressure sensor and generate a control instruction for the control valve 5 according to the internal control algorithm. For example, when the controller receives that the ammonia pressure in the solid ammonia storage tank 11 is greater than the set value, the controller generates a corresponding control instruction to switch the control valve 5 to the first position, such as Figure 2 As shown, all exhaust gas directly enters the muffler 2 for noise reduction and then is discharged into the atmosphere; when the controller receives that the ammonia pressure in the solid ammonia storage tank 11 is less than the set value, the controller generates a corresponding control instruction to switch the control valve 5 to the second position, such as Figure 3 As shown, the high-temperature tail gas partially enters the solid ammonia storage unit; or, the control valve 5 is switched to the third position, such as Figure 4 As shown, all the high-temperature exhaust gas enters the solid ammonia storage unit 1.

[0047] Among them, the specific structure and control method of the controller are existing technologies well known to those skilled in the art and will not be described in detail here.

[0048] Please continue to refer to Figure 1In the present application, the three-way connecting pipe includes a first pipeline 31, the free end of the first pipeline 31 is connected to the engine exhaust outlet, the first pipeline 31 is provided with a mixer 6 and a selective catalytic reduction converter (SCR) 7, and the mixer 6 is located in front of the selective catalytic reduction converter 7.

[0049] The solid ammonia storage unit 1 has an ammonia outlet and also includes an ammonia pipe 8, one end of the ammonia pipe 8 is connected to the ammonia outlet, the other end of the ammonia pipe 8 is connected to the first pipeline 31, and the connection position between the ammonia pipe 8 and the first pipeline 31 is located on the front side of the mixer 6.

[0050] It should be noted that the free end of the first pipe 31 is connected to the engine exhaust outlet, and therefore, the free end of the first pipe 31 forms the exhaust inlet of the engine exhaust after-treatment device. The front side or the rear side is defined here according to the flow direction of the exhaust gas, the direction close to the exhaust inlet is the front side, and the direction away from the exhaust inlet is the rear side.

[0051] As configured above, the ammonia released from the solid ammonia storage tank 10 will enter the first pipeline 31 and the front side of the mixer 6 through the ammonia pipe 8, and will be fully mixed with the exhaust gas discharged by the engine through the mixer 6, and then enter the selective catalytic reduction converter 7 for reduction reaction, thereby achieving the effect of purifying harmful substances NOx in the exhaust gas.

[0052] In practical applications, the high-temperature exhaust gas heats the solid ammonia storage tank 11. The solid ammonia storage tank 11 can be heated internally or externally. For example, when the solid ammonia storage tank 11 is heated internally, the solid ammonia storage tank 11 has an internal heating chamber 11a, and the internal heating chamber 11a has an air inlet and an air outlet. The air inlet is connected to the first exhaust gas inlet 1a, and the air outlet is connected to the first exhaust gas outlet 1b. For example, when the solid ammonia storage tank 11 is heated externally, the solid ammonia storage unit 1 includes a sealed shell 12, and the solid ammonia storage tank 11 is encapsulated inside the sealed shell 12. An external heating chamber 12a is formed inside the sealed shell 12 and on the periphery of the solid ammonia storage tank 11. The first exhaust gas inlet 1a and the first exhaust gas outlet 1b are arranged at both ends of the external heating chamber, and the solid ammonia storage tank 11 is located between the first exhaust gas inlet 1a and the first exhaust gas outlet 1b.

[0053] In the present application, the inner and outer layers of the solid ammonia storage tank 11 are heated simultaneously. Figure 1-Figure 4 As shown, the solid ammonia storage unit 1 includes a sealed shell 12, a solid ammonia storage tank 11 is encapsulated inside the sealed shell 12, and an external heating chamber 12a is formed inside the sealed shell 12 and around the solid ammonia storage tank 11;

[0054] The solid ammonia storage tank 11 has an internal heating chamber 11a, which has an air inlet and an air outlet. The air inlet is connected to the first exhaust gas inlet 1a, and the air outlet is connected to the external heating chamber 12a. The first exhaust gas outlet 1b is connected to the external heating chamber 12a.

[0055] In this way, the high-temperature exhaust gas used for heating will first enter the internal heating chamber 11a inside the solid ammonia storage tank 11, thereby heating the inside of the solid ammonia storage tank 11 and releasing ammonia; the high-temperature exhaust gas enters the external heating chamber 12a through the gas outlet, thereby heating the outer wall of the solid ammonia storage tank 11 and accelerating the release of more ammonia.

[0056] It can be seen that the present invention effectively utilizes high-temperature exhaust gas to heat the inner and outer layers of the solid ammonia storage tank 11 at the same time by providing the inner heating chamber 11a and the outer heating chamber 12a, so as to achieve the purpose of quickly releasing ammonia.

[0057] Please continue to refer to Figure 1-Figure 4 In the present application, a first baffle 13 is further provided inside the sealed shell 12. The first baffle 13 divides the inside of the sealed shell 12 into a first cavity and a second cavity. The first cavity forms an air inlet cavity 12b, and the second cavity forms an external heating cavity 12a. The air inlet cavity 12b is provided with a first exhaust gas inlet 1a. The solid ammonia storage tank 11 passes through the first baffle 13 and is sealed along the circumferential direction. The air inlet is connected to the air inlet cavity 12b.

[0058] As described above, an independent air inlet chamber 12b is separated inside the sealed housing 12 by setting the first baffle 13, and the air inlet chamber 12b is provided with a first tail gas inlet 1a, and one end of the solid ammonia storage tank 11 provided with the air inlet is located inside the air inlet chamber 12b, so that the first tail gas inlet 1a and the air inlet can be connected, and the high-temperature tail gas can first enter the air inlet chamber 12b through the first tail gas inlet 1a, and then enter the air inlet from the air inlet chamber 12b. It can be seen that the above setting method has a simple structure and is more convenient for the installation of the solid ammonia storage tank 11.

[0059] The solid ammonia storage tank 11 and the first baffle 13 are sealed along the circumferential direction. Specifically, the first baffle 13 is provided with a mounting hole for the solid ammonia storage tank 11 to pass through. An annular sealing gasket may be provided at a corresponding position of the inner wall of the mounting hole and / or the outer wall of the solid ammonia storage tank 11. The solid ammonia storage tank 11 and the first baffle 13 are in contact through the annular sealing gasket to achieve sealing.

[0060] In order to improve the installation stability of the solid ammonia storage tank 11, a second baffle 14 is further provided inside the sealed shell 12. The second baffle 14 is arranged opposite to the first baffle 13. The solid ammonia storage tank 11 passes through the second baffle 14. The first baffle 13 and the second baffle 14 are distributed along the axial direction of the solid ammonia storage tank 11. The second baffle 14 is provided with a through hole 14a to facilitate the high-temperature exhaust gas to flow through the second baffle 14 and heat the outer wall of the solid ammonia storage tank 11.

[0061] It is understandable that when the vehicle has traveled a certain mileage, the ammonia in the solid ammonia storage tank 11 is consumed and a new solid ammonia storage tank 11 needs to be replaced. In the prior art, when replacing the solid ammonia storage tank 11, the vehicle needs to be moved to a service station or maintenance station that specializes in replacing the solid ammonia storage tank 11, and the solid ammonia storage tank 11 needs to be replaced by disassembling and installing the post-processing system, which makes the replacement cost of the solid ammonia storage tank 11 high, the replacement time is long, and the convenience is poor.

[0062] Based on this, Figure 5 As shown, in the present application, the solid ammonia storage tank 11 can be detachably passed through the first baffle 13 and the second baffle 14, the ammonia pipe 8 can be detachably connected to the ammonia outlet, and the sealed shell 12 includes a shell body 121 and an end cover 122, one end of the shell body 121 is open, and the end cover 122 can be detachably installed on the open end of the shell body 121.

[0063] As configured above, when the ammonia in the solid ammonia storage tank 11 is consumed and needs to be replaced with a new solid ammonia storage tank 11, the end cover 122 can be detached, the ammonia pipe 8 can be detached, the old solid ammonia storage tank 11 can be pulled out, and the new solid ammonia storage tank 11 can be inserted into the installation position, the ammonia pipe 8 can be reconnected to the ammonia outlet, and the end cover 122 can be installed on the open end of the shell body 121 to complete the replacement of the solid ammonia storage tank 11.

[0064] It can be seen that the present application adopts a flexible method in which the solid ammonia storage tank 22 can be taken out and put in separately, which reduces the difficulty of replacing the solid ammonia storage tank 11 and saves the replacement time cost.

[0065] It should be noted that the aforementioned “one end of the shell body 121 is open” means that after the solid ammonia storage tank 11 is installed in the shell body 121 , the open end of the shell body 121 is located at one axial end of the solid ammonia storage tank 11 .

[0066] Among them, there is no restriction on the connection method between the end cover 122 and the shell body 121, such as threaded connection holes are correspondingly set on the shell body 121, the end cover 122 and the end wall, and also include connecting parts, such as screws, which are threadedly connected to the corresponding threaded connection holes to achieve fixation; or, the end cover 122 and the shell body 121 are fixed by a clamp; or, the end wall of the shell body 121 close to the opening end is provided with an external thread, the end cover 122 is provided with an internal thread, and the shell body 121 and the end cover 122 are threadedly connected.

[0067] Among them, the ammonia pipe 8 is detachably connected to the ammonia outlet. Specifically, an ammonia pipe nut is set at the connecting end of the ammonia pipe 8 and the ammonia outlet, and a matching thread is set on the outer peripheral wall of the pipeline forming the ammonia outlet. The ammonia pipe nut is connected to the pipeline thread to achieve detachable fixation, reliable connection, and easy disassembly and assembly.

[0068] In order to facilitate pulling out the solid ammonia storage tank 11 , a handle 111 is provided on the end wall of the solid ammonia storage tank 11 facing the open end of the shell body 121 , so that the operator can apply force easily.

[0069] Finally, the engine exhaust after-treatment device of the present application further includes a tail pipe 9, the muffler 2 has a second exhaust outlet, and the tail pipe 9 is connected to the second exhaust outlet to discharge the exhaust gas into the atmosphere.

[0070] The present invention also provides a vehicle, comprising the above-mentioned engine exhaust after-treatment device.

[0071] The vehicle of the present invention includes the aforementioned engine exhaust after-treatment device, and therefore has the same technical effects as the aforementioned engine exhaust after-treatment device, which will not be described in detail herein.

[0072] In practical applications, the engine exhaust aftertreatment device can be arranged at the rear of the vehicle or near the sides of the vehicle body.

[0073] The above is a detailed introduction to an engine exhaust aftertreatment device and a vehicle provided by the present invention. The principles and implementation methods of the present invention are described in detail using specific examples herein. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An engine exhaust aftertreatment device, characterized in that: The invention comprises a solid ammonia storage unit (1), a muffler (2) and an intake pipe (3), wherein a solid ammonia storage tank (11) is installed inside the solid ammonia storage unit (1), the solid ammonia storage unit (1) has a first exhaust gas inlet (1a) and a first exhaust gas outlet (1b), the muffler (2) has a second exhaust gas inlet (2a), the intake pipe (3) is connected to the engine exhaust gas outlet, the first exhaust gas inlet (1a) and the second exhaust gas inlet (2a), and the exhaust gas flow rate entering the first exhaust gas inlet (1a) is adjustable, and the invention also comprises a connecting pipe (4), wherein the connecting pipe (4) is connected to the first exhaust gas outlet (1b) and the second exhaust gas inlet (2a).

2. The engine exhaust aftertreatment device according to claim 1, characterized in that: The air intake pipe (3) is a three-way connecting pipe, and the three connecting ends of the three-way connecting pipe are respectively connected to the engine exhaust outlet, the first exhaust inlet (1a), and the second exhaust inlet (2a); It also comprises a control valve (5), which is arranged at the intersection of the three-way connecting pipe, and the control valve (5) can adjust the exhaust gas flow entering the first exhaust gas inlet (1a) according to the ammonia pressure value in the solid ammonia storage tank (11).

3. The engine exhaust aftertreatment device according to claim 2, characterized in that: The three-way connecting pipe comprises a first pipeline (31), the free end of the first pipeline (31) is connected to the engine exhaust outlet, a mixer (6) and a selective catalytic reduction converter (7) are arranged on the first pipeline (31), and the mixer (6) is located in front of the selective catalytic reduction converter (7). The solid ammonia storage unit (1) has an ammonia outlet and also includes an ammonia pipe (8), one end of the ammonia pipe (8) is connected to the ammonia outlet, the other end of the ammonia pipe (8) is connected to the first pipeline (31), and the connection position between the ammonia pipe (8) and the first pipeline (31) is located on the front side of the mixer (6).

4. The engine exhaust aftertreatment device according to claim 1, characterized in that: The solid ammonia storage unit (1) comprises a sealed shell (12), the solid ammonia storage tank (11) is encapsulated inside the sealed shell (12), and an external heating chamber (12a) is formed inside the sealed shell (12) and on the periphery of the solid ammonia storage tank (11); The solid ammonia storage tank (11) has an internal heating chamber (11a) therein, the internal heating chamber (11a) having an air inlet and an air outlet, the air inlet being connected to the first tail gas inlet (1a), the air outlet being connected to the external heating chamber (12a), and the first tail gas outlet (1b) being connected to the external heating chamber (12a).

5. The engine exhaust aftertreatment device according to claim 4, characterized in that: A first baffle (13) is also provided inside the sealed shell (12), and the first baffle (13) divides the inside of the sealed shell (12) into a first cavity and a second cavity, the first cavity forming an air intake cavity (12b), and the second cavity forming the external heating cavity (12a), and the end wall of the air intake cavity (12b) is provided with the first tail gas inlet (1a), the solid ammonia storage tank (11) passes through the first baffle (13) and is sealed along the circumferential direction, and the air intake is connected to the air intake cavity (12b).

6. The engine exhaust aftertreatment device according to claim 5, characterized in that: A second baffle (14) is also provided inside the sealed shell (12); the second baffle (14) is arranged opposite to the first baffle (13); the solid ammonia storage tank (11) passes through the second baffle (14); and the second baffle (14) is provided with a through hole.

7. The engine exhaust aftertreatment device according to claim 6, characterized in that: The solid ammonia storage tank (11) is detachably passed through the first baffle (13) and the second baffle (14); the ammonia pipe (8) is detachably connected to the ammonia outlet; the sealed shell (12) comprises a shell body (121) and an end cover (122); one end of the shell body (121) is open; and the end cover (122) is detachably mounted on the open end of the shell body (121).

8. The engine exhaust aftertreatment device according to claim 7, characterized in that: The solid ammonia storage tank (11) is provided with a handle (111) on the end wall facing the opening end of the shell body (121).

9. The engine exhaust after-treatment device according to any one of claims 1 to 8, characterized in that: It also comprises a tail pipe (9), the muffler (2) having a second exhaust gas outlet, and the tail pipe (9) is in communication with the second exhaust gas outlet.

10. A vehicle, characterized in that: It comprises the engine exhaust after-treatment device as described in any one of claims 1-9.

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