Engine EGR system and vehicle

Abstract

The utility model provides an exhaust gas recirculation system which is used for the technical field of exhaust gas treatment, in particular to an engine exhaust gas recirculation (EGR) system which comprises an air module, a turbocharger, a cooling module, an engine module, a catalytic converter module, a particle trap module and an EGR module. An air outlet of the EGR module communicates with the air module; the EGR module is further connected with the cooling module. Waste gas enters the EGR module through the gas inlet, and part of particulate matter in the waste gas is separated by the EGR module, cooled by the cooling module and then enters the air module. According to the engine EGR system, part of particulate matter is separated in advance before waste gas is cooled, carbon deposition is prevented from being generated, and EGR cooling efficiency and long-acting stability are improved. The utility model further provides a vehicle comprising the engine EGR system, the carbon deposition degree of the engine EGR system is reduced, and frequent shutdown, disassembly and maintenance are avoided.

Description

Technical Field

[0001] This application relates to the field of exhaust gas treatment technology, specifically to an engine EGR system and a vehicle. Background Technology

[0002] In EGR (Exhaust Gas Recirculation) systems, coolers reduce nitrogen oxide emissions by lowering the temperature of the recirculated exhaust gas. The exhaust gas contains unburned hydrocarbons and particulate matter, which easily form a carbon deposit on the inner walls of the cooler pipes at high temperatures. This carbon deposit has insulating properties, hindering heat transfer and preventing the cooling medium from effectively absorbing heat from the exhaust gas, significantly reducing cooling efficiency. Furthermore, carbon deposits narrow flow channels, increasing local airflow resistance and further reducing heat exchange efficiency. With increasingly stringent emission regulations, the challenge posed by carbon deposits to system reliability is becoming increasingly prominent. Utility Model Content

[0003] In view of this, this application provides an engine EGR system and vehicle that, by pre-separating particulate matter before cooling exhaust gas, blocks the formation of carbon deposits and improves EGR cooling efficiency and long-term stability.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] An engine EGR system, comprising:

[0006] The modules include: air module, turbocharger, cooling module, engine module, catalytic converter module, particulate filter module, and EGR module, among which:

[0007] The air inlet of the EGR module is located between the catalytic converter module and the particulate filter module, and the air outlet of the EGR module is connected to the air module; the EGR module is also connected to the cooling module.

[0008] Exhaust gas enters the EGR module through the air inlet, where some particulate matter is separated by the EGR module and then cooled by the cooling module before entering the air module.

[0009] The engine EGR system of this application reduces the probability of exhaust gas entering the cooling water channel by pre-separating exhaust gas from solid particulate matter, thereby reducing carbon deposit formation at the source, blocking the deposition path of particulate matter, ensuring continuous unobstructed pipeline, overcoming the defects of traditional technology such as serious carbon deposit problems and maintenance relying on disassembly, reducing the rate of cooling efficiency decline, and significantly improving the long-term stability of the EGR system under harsh operating conditions.

[0010] Optionally, the EGR module includes an inlet flange, an air intake pipe assembly, a cyclone separator chamber, and an outlet pipe assembly connected in sequence. The inlet flange is connected to the outlet flange of the catalytic converter module, the outlet of the outlet pipe assembly is connected to the particulate filter module, and the outlet pipe assembly is connected to the cooling module.

[0011] Exhaust gas can enter the cyclone separation chamber from the outlet flange of the catalytic converter module through the gas inlet pipe assembly, and then be discharged to the particulate filter module through the outlet pipe assembly. Before the particulate filter module collects and treats the particles in the exhaust gas, the particles in the exhaust gas are pre-separated. On the one hand, this can reduce carbon deposits in the EGR module, and on the other hand, it can cooperate with the particulate filter module to reduce particulate matter in the exhaust gas.

[0012] Optionally, the cyclone separation chamber includes a separation chamber body, a dust collection tank, an airflow channel, and a second electromagnetic control valve;

[0013] The air intake pipe assembly is sequentially connected to the separation chamber body, the airflow channel, and the air outlet pipe assembly. The air intake pipe assembly is tangentially arranged to the separation chamber body, and the exhaust gas entering from the air intake pipe assembly can enter the separation chamber body tangentially and form a swirling flow. The dust collection tank is arranged below the separation chamber body, and the bottom of the dust collection tank is provided with the second electromagnetic control valve, which is electrically connected to the vehicle control unit.

[0014] The separation chamber body can form a swirling flow of exhaust gas, thereby achieving gas-solid separation. It can pre-separate particulate matter in exhaust gas, and the pre-separated particulate matter in the dust collection tank can be discharged by opening / closing the second electromagnetic control valve at the bottom of the dust collection tank.

[0015] Optionally, the EGR module further includes a cooling assembly disposed on the outer periphery of the exhaust pipe assembly. The cooling assembly is provided with a coolant inlet pipe and a coolant outlet pipe, with the inlet of the coolant inlet pipe and the outlet of the coolant outlet pipe respectively connected to the cooling module.

[0016] The cooling assembly is used to exchange the high-temperature heat of the exhaust gas passing through the exhaust manifold assembly, so as to reduce the heat of the exhaust gas passing through the EGR module and avoid the risk of knocking caused by high-temperature exhaust gas entering the engine.

[0017] Optionally, the EGR module further includes a backflush pipe assembly, which can backflush the outlet pipe assembly and allow carbon particles detached from the inner wall of the outlet pipe assembly to enter the dust collection tank through the separation chamber body.

[0018] Adding a backflush assembly to the EGR module can further remove carbon deposits inside the exhaust pipe assembly.

[0019] Optionally, the air outlet of the backflush pipe assembly is located in the circumferential direction of the air outlet pipe assembly.

[0020] The air outlet of the backflush pipe is positioned circumferentially on the air outlet assembly, so as not to interfere with the air outlet of the air outlet assembly.

[0021] Optionally, the turbocharger includes a compressor and a turbine, the compressor having a branch outlet connected to the inlet of the backflush assembly.

[0022] By using the high-pressure pulsed airflow generated by the compressor to periodically reverse-flush the inner wall of the outlet pipe assembly, carbon deposits are self-cleaned, avoiding downtime for disassembly and maintenance, and resulting in lower costs.

[0023] Optionally, the air outlet of the air outlet assembly is connected to the air inlet of the air module, and a third electromagnetic control valve is provided on the air outlet of the air outlet assembly, which is electrically connected to the vehicle control unit.

[0024] The air outlet of the air outlet assembly is equipped with an openable / closeable valve to prevent airflow from flowing out through the air outlet of the air outlet assembly during backflushing mode.

[0025] Optionally, the air inlet of the backflush assembly is provided with a fourth electromagnetic control valve, which is electrically connected to the vehicle control unit.

[0026] This prevents the airflow during normal operation from flowing backward through the air inlet of the backflush assembly.

[0027] This application also provides a vehicle including the aforementioned engine EGR system. By incorporating the aforementioned engine EGR system, the vehicle of this application reduces the carbon buildup in the engine EGR system, avoids downtime for disassembly and maintenance, and reduces costs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the engine EGR system of this application;

[0030] Figure 2 This is a schematic diagram of the EGR module structure in this application.

[0031] exist Figures 1-2 middle:

[0032] 10. Air module; 20. Turbocharger; 201. Compressor; 202. Turbine; 30. Cooling module; 40. Engine module; 50. Catalytic converter module; 501. Exit flange; 60. Particulate filter module; 70. Muffler module; 80. EGR module; 801. Intake flange; 802. Blow-out pipe assembly; 8021. First electromagnetic control valve; 803. Swirl separator chamber; 804. Cooling assembly; 8041. Coolant inlet pipe; 8042. Coolant outlet pipe; 805. Exit pipe assembly; 8051. Third electromagnetic control valve; 806. Backflush pipe assembly; 8061. Fourth electromagnetic control valve; 90. Vehicle control unit. Detailed Implementation

[0033] This application provides an engine EGR system and vehicle that, by pre-separating particulate matter before cooling exhaust gas, blocks the formation of carbon deposits and improves EGR cooling efficiency and long-term stability.

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] like Figures 1-2 As shown, the engine EGR system provided in this application includes:

[0036] The system includes an air module 10, a turbocharger 20, a cooling module 30, an engine module 40, a catalytic converter module 50, a particulate filter module 60, a muffler module 70, an EGR module 80, and a vehicle control unit 90. Air enters the turbocharger 20 through the air module 10 and then enters the engine module 40. The exhaust gas from the engine module 40 is treated by the catalytic converter module 50 and the particulate filter module 60, and then discharged into the atmosphere through the muffler module 70.

[0037] The air inlet of the EGR module 80 is located between the catalytic converter module 50 and the particulate filter module 60, and the air outlet of the EGR module 80 is connected to the air module 10; the EGR module 80 is also connected to the cooling module 30.

[0038] Exhaust gas enters the EGR module 80 through the air inlet. Some particulate matter in the exhaust gas is pre-separated by the EGR module 80 and then cooled by the cooling module 30 before entering the air module 10.

[0039] The engine EGR system of this application has an EGR module 80 located between the catalytic converter module 50 and the particulate filter module 60, which diverts exhaust gas to the air module 10, thereby reducing the generation of nitrogen oxides in the engine module 40. The EGR module 80 is connected in series with the cooling module 30, which reduces the heat of the diverted exhaust gas, preventing high-temperature exhaust gas from entering the engine module 40 and causing knocking risk. Before the exhaust gas is cooled, the EGR module 80 pre-separates the exhaust gas from solid particles, reducing the probability of them entering the cooling channel, reducing carbon deposit formation at the source, blocking the path of particulate matter deposition, ensuring continuous unobstructed pipeline, overcoming the defects of traditional technology such as serious carbon deposit problems and maintenance relying on disassembly, reducing the rate of cooling efficiency decay, and significantly improving the long-term stability of the EGR system under harsh operating conditions.

[0040] In a preferred embodiment, such as Figure 2 As shown, the EGR module 80 includes an inlet flange 801, an air intake pipe assembly 802, a cyclone separator 803, and an outlet pipe assembly 805 connected in sequence. The inlet flange 801 is located circumferentially at the end of the air intake port of the air intake pipe assembly 802 and is connected to the outlet flange 501 of the catalytic converter module 50. The outlet port of the outlet pipe assembly 805 is connected to the particulate filter module 60, and the outlet pipe assembly 805 is also connected to the cooling module 30.

[0041] Exhaust gas can enter the cyclone separator chamber 803 from the outlet flange 501 of the catalytic converter module 50 through the gas inlet pipe assembly 802, and then pass through the outlet pipe assembly 805 to the particulate filter module 60. Before the particulate filter module 60 collects and treats the particles in the exhaust gas, the particles in the exhaust gas are pre-separated. On the one hand, this can reduce carbon deposits in the EGR module 80, and on the other hand, it can cooperate with the particulate filter module 60 to reduce particulate matter in the exhaust gas. The outlet pipe assembly 805 is also connected to the cooling module 30, which cools the high-temperature exhaust gas in the outlet pipe assembly 805 through heat exchange.

[0042] In a preferred embodiment, the cyclone separation chamber 803 includes a separation chamber body, a dust collection tank, an airflow channel, and a second electromagnetic control valve;

[0043] The air intake pipe assembly 802 is sequentially connected to the separation chamber body, the airflow channel, and the air outlet pipe assembly 805. The air intake pipe assembly 802 is tangentially arranged to the separation chamber body. Since the exhaust gas entering from the air intake pipe assembly 802 can enter the separation chamber body tangentially, a swirling flow can be formed. A dust collection tank is provided below the separation chamber body. A second electromagnetic control valve is provided at the bottom of the dust collection tank. The second electromagnetic control valve is electrically connected to the vehicle control unit 90.

[0044] The separation chamber body can create a swirling flow of exhaust gas, thereby achieving gas-solid separation between the exhaust gas and the particulate matter within it. The particulate matter falls from the separation chamber body to the dust collection tank below it. This pre-separation of particulate matter in the exhaust gas before the particulate trap module 60 removes some of the particulate matter. The exhaust gas with some particulate matter removed continues to flow into the airflow channel and then to the exhaust pipe assembly 805. Furthermore, the vehicle control unit 90 can send a control signal to the second electromagnetic control valve to control the opening / closing of the second electromagnetic control valve at the bottom of the dust collection tank, thereby discharging the pre-separated particulate matter from the dust collection tank. The second electromagnetic control valve can be opened / closed periodically to discharge the particulate matter from the dust collection tank. Alternatively, a position detection device can be installed inside the dust collection tank to open the second electromagnetic control valve for cleaning only when the tank is full of particulate matter.

[0045] In a preferred embodiment, such as Figure 2 As shown, the EGR module 80 also includes a cooling assembly 804, which is disposed on the outer periphery of the exhaust pipe assembly 805. The cooling assembly 804 is provided with a coolant inlet pipe 8041 and a coolant outlet pipe 8042. The inlet of the coolant inlet pipe 8041 and the outlet of the coolant outlet pipe 8042 are respectively connected to the cooling module 30.

[0046] The cooling assembly 804 is used to exchange the high-temperature heat of the exhaust gas passing through the exhaust pipe assembly 805, so as to reduce the heat of the exhaust gas passing through the EGR module and avoid the risk of knocking caused by the high-temperature exhaust gas entering the engine module 40. Specifically, the cooling assembly 804 is arranged in the middle section of the exhaust pipe assembly 805 along its length, or the cooling assembly 804 extends from one end of the exhaust pipe assembly 805 along its length to the other end. A coolant storage chamber is formed between the inner wall of the cooling assembly 804 and the outer wall of the exhaust pipe assembly 805. The coolant inlet pipe 8041 and the coolant outlet pipe 8042 are both connected to the coolant storage chamber. The coolant can enter the inlet of the coolant inlet pipe 8041 from the cooling module 30, then enter the coolant storage chamber, and then flow back to the cooling module 30 from the outlet of the coolant outlet pipe 8042, forming a cycle. The coolant carries away the heat of the high-temperature exhaust gas in the exhaust pipe assembly 805.

[0047] In a preferred embodiment, such as Figure 2 As shown, the EGR module 80 also includes a backflush pipe assembly 806, which can backflush the exhaust pipe assembly 805 and allow carbon particles peeled off from the inner wall of the exhaust pipe assembly 805 to enter the dust collection tank through the separation chamber body. The backflush air can be discharged from the second electromagnetic control valve at the bottom of the dust collection tank.

[0048] This application reduces carbon buildup at the source by pre-separating particulate matter before cooling exhaust gas to block carbon deposit formation. Furthermore, a backflush pipe assembly 806 is added to the EGR module 80 to further remove carbon deposits from the inner wall of the exhaust pipe assembly 805. The backflush allows the carbon deposits to enter the separation chamber of the cyclone separation chamber 803 and then be discharged into the dust collection tank, thus enhancing the anti-clogging capability of the EGR module 80, especially the exhaust pipe assembly 805.

[0049] In a preferred embodiment, such as Figure 2 As shown, the air outlet of the backflush pipe assembly 806 is located in the circumferential direction of the air outlet pipe assembly 805.

[0050] The air outlet of the backflush pipe assembly 806 is positioned in the circumferential direction of the air outlet pipe assembly 805, so as not to interfere with the air outlet of the air outlet pipe assembly 805. Specifically, the air outlet pipe assembly 805 has an opening in the circumferential direction, and the air outlet of the backflush pipe assembly 806 is connected to the inner cavity of the air outlet pipe assembly 805 through the opening.

[0051] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the turbocharger 20 includes a compressor 201 and a turbine 202. The compressor 201 is provided with a branch outlet, which is connected to the air inlet of the backflush assembly 806.

[0052] In this way, the high-pressure pulse airflow generated by the compressor 201 can be used to periodically reverse flush the inner wall of the outlet pipe assembly 805, achieving self-cleaning of carbon deposits, avoiding downtime for disassembly and maintenance, and reducing costs.

[0053] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the air outlet of the air outlet assembly 805 is connected to the air inlet of the air module 10. A third electromagnetic control valve 8051 is provided on the air outlet of the air outlet assembly 805, and the third electromagnetic control valve 8051 is electrically connected to the vehicle control unit 90.

[0054] The vehicle control unit 90 can control the opening / closing of the third electromagnetic control valve 8051. When the engine EGR system is in working mode, the third electromagnetic control valve 8051 can be opened, allowing exhaust gas to flow normally through the outlet of the exhaust pipe assembly 805 to the particulate filter module 60. When the engine EGR system is in backflush mode, the third electromagnetic control valve 8051 can be closed to prevent the gas blown in by the backflush pipe assembly 806 from flowing to the particulate filter module 60 through the third electromagnetic control valve 8051.

[0055] In a preferred embodiment, such as Figure 2As shown, a fourth electromagnetic control valve 8061 is provided on the air inlet of the backflush assembly 806, and the fourth electromagnetic control valve 8061 is electrically connected to the vehicle control unit 90.

[0056] The vehicle control unit 90 can control the opening / closing of the fourth electromagnetic control valve 8061. When the engine EGR system is in working mode, the fourth electromagnetic control valve 8061 can be closed, which can prevent the airflow in normal working mode from flowing out in reverse through the air inlet of the backflush pipe assembly 806. When the engine EGR system is in backflush mode, the fourth electromagnetic control valve 8061 can be opened, so that the airflow from the branch outlet of the compressor 201 enters the backflush pipe assembly 806 through the fourth electromagnetic control valve 8061, and then enters the outlet pipe assembly 805 for backflush.

[0057] The engine EGR system of this application includes an air module 10, a turbocharger 20, a cooling module 30, an engine module 40, a catalytic converter module 50, a particulate filter module 60, a muffler module 70, an EGR module 80, and a vehicle control unit 90.

[0058] The EGR module 80 is located between the catalytic converter module 50 and the particulate filter module 60. It can divert exhaust gas to the air module 10 to reduce the generation of nitrogen oxides in the engine module 40. The EGR module 80 is connected in series with the cooling module 30. The cooling module 30 can reduce the heat of the diverted exhaust gas and prevent high-temperature exhaust gas from entering the engine and causing knocking risk.

[0059] The turbocharger 20 includes a compressor 201 and a turbine 202. The compressor 201 has a branch line at its outlet, which can backflush the cooling passage of the EGR module 80 to remove carbon deposits in the cooling pipes.

[0060] The catalytic converter module 50 is provided with an outlet flange 501, which can be connected to the EGR module 80 to divert exhaust gas to the EGR module 80; the EGR module 80 includes an inlet flange 801, an intake pipe assembly 802, a swirl separator 803, a cooling assembly 804, an outlet pipe assembly 805, and a backflush pipe assembly 806.

[0061] The exhaust pipe assembly 802 is equipped with a first electromagnetic control valve 8021, the opening and closing of which is controlled by the vehicle control unit 90. The cyclone separation chamber 803 is mainly used to achieve gas-solid separation and can pre-separate particulate matter in the exhaust gas. Its structure includes a separation chamber, a dust collection tank, an airflow channel, and a second electromagnetic control valve. The dust collection tank is equipped with a second electromagnetic control valve at the bottom, the opening and closing of which is controlled by the vehicle control unit 90 to discharge the pre-separated particulate matter. The exhaust gas enters the cyclone separation chamber 803 tangentially, the pre-separated particulate matter enters the dust collection tank, and the remaining gas enters the exhaust pipe assembly 805 through the airflow channel.

[0062] The cooling assembly 804 is located on the outer periphery of the exhaust pipe assembly 805 and is used to exchange heat with the high-temperature heat of the exhaust gas to achieve EGR-split exhaust gas cooling. It is equipped with a coolant inlet pipe 8041 and a coolant outlet pipe 8042, and is connected to the cooling module 30. The exhaust port of the exhaust pipe assembly 805 is connected to the air inlet of the air module 10, and is equipped with a third electromagnetic control valve 8051, the opening / closing of which is controlled by the vehicle control unit 90. The air inlet of the backflush pipe assembly 806 is connected to the split branch of the compressor 201 of the turbocharger 20, and is equipped with a fourth electromagnetic control valve 8061, the opening / closing of which is controlled by the vehicle control unit 90.

[0063] The working mode of the engine EGR system of this application is as follows: When the EGR module 80 is in the working mode, the first electromagnetic control valve 8021 and the third electromagnetic control valve 8051 are in the open state, and the second electromagnetic control valve and the fourth electromagnetic control valve 8061 are in the closed state. At this time, the exhaust gas enters the swirl separation chamber 803 through the exhaust flange 501 and the air intake pipe assembly 802. The exhaust gas with pre-separated particulate matter then enters the exhaust pipe assembly 805, and after being cooled by the cooling assembly 804, it enters the air module 10 to participate in the combustion of the engine module 40.

[0064] The backflush mode of the engine EGR system in this application is as follows: When the EGR module 80 is in backflush mode, the first electromagnetic control valve 8021 and the third electromagnetic control valve 8051 are closed, and the second electromagnetic control valve and the fourth electromagnetic control valve 8061 are open. At this time, the air diverted by the compressor 201 of the turbocharger 20 enters the exhaust pipe assembly 805 through the backflush pipe assembly 806. The carbon particles stripped from the exhaust pipe assembly 805 enter the dust collection tank through the cyclone separation chamber 803 and are discharged by the second electromagnetic control valve.

[0065] This application also provides a vehicle including the aforementioned engine EGR system. By incorporating the aforementioned engine EGR system, the vehicle of this application reduces the carbon buildup in the engine EGR system, avoids frequent shutdowns for disassembly and maintenance, and reduces costs.

[0066] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0067] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the word “or” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0068] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled or recombined. These disassemblies or recombinations should be considered as equivalent solutions of this application.

[0069] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0070] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0071] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. An engine EGR system, characterized in that, include: The system comprises an air module (10), a turbocharger (20), a cooling module (30), an engine module (40), a catalytic converter module (50), a particulate filter module (60), and an EGR module (80), wherein: The air inlet of the EGR module (80) is located between the catalytic converter module (50) and the particulate filter module (60), and the air outlet of the EGR module (80) is connected to the air module (10); the EGR module (80) is also connected to the cooling module (30). The exhaust gas enters the EGR module (80) through the air inlet. Some of the particulate matter in the exhaust gas is separated by the EGR module (80), and then cooled by the cooling module (30) before entering the air module (10).

2. The engine EGR system according to claim 1, characterized in that, The EGR module (80) includes an inlet flange (801), an air intake pipe assembly (802), a cyclone separator (803), and an outlet pipe assembly (805) connected in sequence. The inlet flange (801) is connected to the outlet flange (501) of the catalytic converter module (50). The outlet of the outlet pipe assembly (805) is connected to the particulate filter module (60), and the outlet pipe assembly (805) is connected to the cooling module (30).

3. The engine EGR system according to claim 2, characterized in that, The cyclone separation chamber (803) includes a separation chamber body, a dust collection tank, an airflow channel, and a second electromagnetic control valve; The air intake pipe assembly (802) is sequentially connected to the separation chamber body, the airflow channel, and the air outlet pipe assembly (805). The air intake pipe assembly (802) is tangentially arranged to the separation chamber body. The exhaust gas entering from the air intake pipe assembly (802) can enter the separation chamber body tangentially and form a swirling flow. The dust collection tank is provided below the separation chamber body. The bottom of the dust collection tank is provided with the second electromagnetic control valve. The second electromagnetic control valve is electrically connected to the vehicle control unit (90).

4. The engine EGR system according to claim 3, characterized in that, The EGR module (80) further includes a cooling assembly (804), which is disposed on the outer periphery of the exhaust pipe assembly (805). The cooling assembly (804) is provided with a coolant inlet pipe (8041) and a coolant outlet pipe (8042). The inlet of the coolant inlet pipe (8041) and the outlet of the coolant outlet pipe (8042) are respectively connected to the cooling module (30).

5. The engine EGR system according to claim 3 or 4, characterized in that, The EGR module (80) also includes a backflush pipe assembly (806) which can backflush the exhaust pipe assembly (805) and allow carbon particles detached from the inner wall of the exhaust pipe assembly (805) to enter the dust collection tank through the separation chamber body.

6. The engine EGR system according to claim 5, characterized in that, The air outlet of the backflush pipe assembly (806) is located in the circumferential direction of the air outlet pipe assembly (805).

7. The engine EGR system according to claim 5, characterized in that, The turbocharger includes a compressor (201) and a turbine (202), the compressor (201) being provided with a branch outlet connected to the inlet of the backflush assembly (806).

8. The engine EGR system according to claim 5, characterized in that, The air outlet of the air outlet assembly (805) is connected to the air inlet of the air module (10). A third electromagnetic control valve (8051) is provided on the air outlet of the air outlet assembly (805), and the third electromagnetic control valve (8051) is electrically connected to the vehicle control unit (90).

9. The engine EGR system according to claim 5, characterized in that, The air inlet of the backflush assembly (806) is provided with a fourth electromagnetic control valve (8061), which is electrically connected to the vehicle control unit (90).

10. A vehicle, characterized in that, Includes the engine EGR system as described in any one of claims 1-9.

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