Exhaust gas recirculation system for a vehicle and vehicle

Abstract

The application discloses a kind of vehicle exhaust gas recirculation systems and vehicle, it is related to exhaust gas recirculation technical field, vehicle exhaust gas circulation system includes: condenser, supercharger, intercooler, air cleaner and gas-liquid separation device, supercharger is connected between condenser and intercooler, and condenser is used to be connected with the exhaust manifold of the engine of vehicle, air cleaner is connected with supercharger, gas-liquid separation device has device import and device export, device import is connected with intercooler, device export is suitable for being connected with the intake manifold of engine, the setting height of device export is suitable for being lower than the setting height of intake manifold.The exhaust gas recirculation system of vehicle according to the embodiment of the application can avoid mixed gas to precipitate liquid water in engine cylinder, the liquid water precipitated in intake manifold can be backflowed to gas-liquid separation device, and mixed gas can be stably combusted in engine cylinder, which is beneficial to improve the stability and safety of engine operation.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas recirculation technology, and in particular to an exhaust gas recirculation system for a vehicle and a vehicle having the exhaust gas recirculation system. Background Technology

[0002] In existing exhaust gas recirculation systems, the mixture of exhaust gas and fresh air is cooled in the intercooler. The temperature of the mixture is below its freezing point, which can form liquid water. This liquid water can enter the engine cylinder along with the mixture, affecting the engine's combustion stability. Furthermore, the liquid water can accumulate at the bottom of the intake manifold and be drawn into the engine cylinder, potentially causing misfires and affecting the engine's operational safety. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a vehicle exhaust gas recirculation system that can prevent the precipitation of liquid water in the engine cylinders, allowing the liquid water precipitated in the intake manifold to flow back to the gas-liquid separator, and enabling stable combustion of the gas mixture in the engine cylinders, thereby improving the stability and safety of engine operation.

[0004] The present invention further proposes a vehicle using the above-described exhaust gas recirculation system.

[0005] According to a first aspect of the present invention, a vehicle exhaust gas recirculation system includes: a condenser, a turbocharger, an intercooler, an air filter, and a gas-liquid separator. The turbocharger is connected between the condenser and the intercooler, and the condenser is configured to be connected to the exhaust manifold of the vehicle's engine. The air filter is connected to the turbocharger. The gas-liquid separator has a device inlet and a device outlet. The device inlet is connected to the intercooler, and the device outlet is adapted to be connected to the intake manifold of the engine. The device outlet is configured at a height lower than that of the intake manifold.

[0006] According to the exhaust gas recirculation system of this application embodiment, by setting a gas-liquid separator, the humidity of the mixed gas can be reduced, preventing liquid water from precipitating in the engine cylinder. By setting the outlet height of the separator lower than the intake manifold height, the liquid water precipitated in the intake manifold can flow back to the gas-liquid separator, further preventing liquid water from affecting the combustion of the mixed gas in the engine cylinder. The mixed gas can burn stably in the engine cylinder, which is beneficial to improving the stability and safety of engine operation.

[0007] According to some embodiments of the present invention, the gas-liquid separation device includes: a device body and a filtrate structure, the device body defining a gas flow channel, the device body forming a device inlet and a device outlet, the gas flow channel communicating with the device inlet and the device outlet, and the filtrate structure disposed within the gas flow channel.

[0008] According to some embodiments of the present invention, at least a portion of the gas flow channel is configured as a variable diameter section, wherein the cross-sectional area of ​​the variable diameter section gradually decreases from the inlet of the device to the outlet of the device.

[0009] According to some embodiments of the present invention, the filtrate structure is located within the variable diameter section.

[0010] According to some embodiments of the present invention, the gas-liquid separation device further includes: a liquid storage structure defining a liquid storage space, wherein the liquid separated when the gas flows through the filtrate structure is adapted to flow into the liquid storage space.

[0011] According to some embodiments of the present invention, the liquid storage structure is located outside the device body, the device body has a liquid outlet, and the liquid outlet communicates with the liquid storage space and the gas flow channel.

[0012] According to some embodiments of the present invention, the outlet is located below the filtrate structure.

[0013] According to some embodiments of the present invention, the bottom wall of the liquid storage structure is formed with a drain port, and the drain port is provided with an on / off valve for opening or closing the drain port.

[0014] According to some embodiments of the present invention, the exhaust gas recirculation system further includes: a liquid level sensor disposed on the liquid storage structure to detect the liquid level height in the liquid storage space, and both the liquid level sensor and the on / off valve are adapted to communicate with the vehicle's controller so that the controller controls the operation of the on / off valve.

[0015] A vehicle according to a second aspect of the present invention includes the exhaust gas recirculation system of the vehicle described in the above embodiments.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1This is a schematic diagram of the exhaust gas recirculation system and engine cylinder assembly according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram showing the connection of the gas-liquid separation device, intercooler, intake manifold, and throttle valve according to an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the liquid storage structure according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram showing that the outlet of the gas-liquid separation device according to an embodiment of this application is installed at a height lower than that of the intake manifold.

[0022] Figure label:

[0023] Exhaust gas recirculation system 100,

[0024] Condenser 10, turbocharger 20, intercooler 30, air filter 40

[0025] Gas-liquid separation device 50, device body 51, device inlet 511, device outlet 512, gas flow channel 513, filtrate structure 52, liquid storage structure 53, liquid storage space 531, baffle 5311, first opening 5312, drain port 532, on / off valve 533, liquid level sensor 534.

[0026] Catalyst 60, Exhaust pipe 61,

[0027] Gas intake line 70,

[0028] Engine cylinder 200, exhaust manifold 210, intake manifold 220, throttle valve 230. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The following is for reference. Figures 1-4 A vehicle exhaust gas recirculation system 100 according to an embodiment of the present invention is described.

[0031] According to an embodiment of the first aspect of the present invention, a vehicle exhaust gas recirculation system 100, such as Figure 1As shown, the exhaust gas recirculation system 100 may include: a condenser 10, a turbocharger 20, an intercooler 30, an air filter 40, and a gas-liquid separator 50. The turbocharger 20 is connected between the condenser 10 and the intercooler 30, and the condenser 10 is used to connect to the exhaust manifold 210 of the vehicle's engine. The air filter 40 is connected to the turbocharger 20. The gas-liquid separator 50 has a device inlet 511 and a device outlet 512. The device inlet 511 is connected to the intercooler 30, and the device outlet 512 is adapted to connect to the engine's intake manifold 220. The device outlet 512 is set at a height lower than that of the intake manifold 220.

[0032] It should be noted that in existing exhaust gas recirculation systems, the mixture of exhaust gas and fresh air is cooled in the intercooler. The temperature of the mixture is below its freezing point, which can form liquid water. This liquid water can enter the engine cylinder along with the mixture, affecting the engine's combustion stability. Furthermore, the liquid water can accumulate at the bottom of the intake manifold and be drawn into the engine cylinder, which can easily lead to misfires and affect the engine's operational safety.

[0033] Based on this, this application proposes an exhaust gas recirculation system 100. Fresh air can be burned in the engine cylinder 200, producing exhaust gas, which includes a large amount of carbon dioxide and water vapor. Fresh air can enter the exhaust gas recirculation system 100 through an air filter 40, which filters the fresh air to ensure the cleanliness of the intake air. A condenser 10 can be connected to the exhaust manifold 210 of the vehicle's engine. High-temperature exhaust gas can be discharged from the engine cylinder 200 through the exhaust manifold 210 and enter the condenser 10. The condenser 10 cools the high-temperature exhaust gas. The cooled exhaust gas can be mixed with the fresh air filtered by the air filter 40 to form a mixed gas. The air filter 40 is connected to a turbocharger 20, allowing fresh air to enter the turbocharger 20. The condenser 10 is also connected to the turbocharger 20, allowing the exhaust gas to mix with the fresh air before entering the turbocharger 20 to form a mixed gas. The turbocharger 20 can be turbine-driven or electrically driven. When fresh air or a gas-fuel mixture enters the turbocharger 20, it compresses the intake air, thereby increasing its pressure and density. This improves the airflow into the engine, ensuring its output power. The turbocharger 20 is connected between the condenser 10 and the intercooler 30. The intercooler 30 lowers the temperature of the pressurized, high-temperature fresh air or the pressurized, high-temperature gas-fuel mixture, thus reducing the engine's thermal load, increasing the engine's intake air volume, and ultimately increasing engine power.

[0034] Fresh air is filtered by air filter 40 and then pressurized in turbocharger 20. The pressurized, high-temperature fresh air is cooled in intercooler 30. The cooled fresh air enters engine cylinder 200 for combustion, producing exhaust gas. A portion of the exhaust gas is cooled by condenser 10 and mixed with fresh air to form a mixed gas. The mixed gas is compressed in turbocharger 20. The pressurized, high-temperature mixed gas is cooled in intercooler 30, and the temperature of the high-temperature mixed gas decreases. Since the exhaust gas contains a large amount of carbon dioxide and water vapor, the water vapor in the mixed gas after being cooled by intercooler 30 easily condenses into liquid water and is released. Therefore, a gas-liquid separator 50 is connected between intercooler 30 and engine intake manifold 220.

[0035] The gas-liquid separator 50 has an inlet 511 connected to the intercooler 30 and an outlet 512 connected to the engine intake manifold 220. After being cooled in the intercooler 30, the gas-liquid mixture enters the gas-liquid separator 50. Water vapor in the gas-liquid mixture can precipitate within the gas-liquid separator 50, and the precipitated liquid water remains in the gas-liquid separator 50. If liquid water precipitates in the intake manifold 220, the outlet 512 is positioned lower than the intake manifold 220, allowing the liquid water in the intake manifold 220 to flow back to the gas-liquid separator 50 under gravity. This prevents the liquid water from accumulating in the intake manifold 220 and entering the engine cylinder 200 with the gas-liquid mixture, thus avoiding unstable combustion in the engine cylinder 200.

[0036] As an example, the intake manifold 220 can be inclined along the flow direction of the mixed gas, that is, the setting height of the intake manifold 220 inlet is lower than the setting height of the intake manifold 220 outlet, which can further facilitate the flow of liquid water from the intake manifold 220 back into the gas-liquid separator 50.

[0037] In this embodiment, by setting the gas-liquid separator 50, the humidity of the mixed gas can be reduced, preventing liquid water from precipitating in the engine cylinder 200. By setting the outlet 512 of the device to a height lower than that of the intake manifold 220, the liquid water precipitated in the intake manifold 220 can flow back to the gas-liquid separator 50, further preventing liquid water from affecting the combustion of the mixed gas in the engine cylinder 200. The mixed gas can burn stably in the engine cylinder 200, which is beneficial to improving the stability and safety of engine operation.

[0038] In some embodiments of the present invention, such as Figure 1As shown, the exhaust gas recirculation system 100 can also be connected to a catalytic converter 60. The catalytic converter 60 has an exhaust pipe 61 that connects to the atmospheric environment. The high-temperature exhaust gas generated by engine combustion can be catalyzed by the catalytic converter 60 and then discharged into the atmospheric environment through the exhaust pipe 61. The condenser 10 can be directly connected to the exhaust manifold 210 through the intake pipe 70, or the condenser 10 can be connected to the catalytic converter 60 through the intake pipe 70. When the condenser 10 is directly connected to the exhaust manifold 210 through the intake pipe 70, the intake pipe 70 can directly draw high-temperature exhaust gas from the exhaust manifold 210. When the condenser 10 is connected to the catalytic converter 60 through the intake pipe 70, the intake pipe 70 can draw gas from the catalytic converter 60, or the intake pipe 70 can draw gas from the exhaust pipe 61. Part of the exhaust gas generated by engine combustion enters the condenser 10, is cooled, and mixes with fresh air to form a mixed gas. After liquid water is released from the mixed gas, it enters the engine cylinder 200 for combustion.

[0039] In some embodiments of the present invention, such as Figure 2 As shown, the gas-liquid separation device 50 may include: a device body 51 and a filter structure 52. The device body 51 defines a gas flow channel 513. The device body 51 has a device inlet 511 and a device outlet 512. The gas flow channel 513 connects the device inlet 511 and the device outlet 512. The filter structure 52 is disposed in the gas flow channel 513.

[0040] One end of the gas flow channel 513 is connected to the device inlet 511, and the other end is connected to the device outlet 512. The gas flow channel 513 connects the intercooler 30 and the engine intake manifold 220. The mixed gas can be cooled in the intercooler 30 and then enter the gas flow channel 513 through the device inlet 511. The gas flow channel 513 is equipped with a filter structure 52. As the mixed gas passes through the filter structure 52, water vapor in the mixed gas can condense into liquid water and be released, thereby reducing the water vapor content in the mixed gas and preventing liquid water from entering the engine cylinder 200. The mixed gas enters the intake manifold 220 from the gas flow channel 513 through the device outlet 512. When the mixed gas burns in the engine cylinder 200, it can burn stably, which helps improve engine safety.

[0041] As an example, the filtrate structure 52 can be configured as a cooler capable of further reducing the temperature of the mixed gas. As the temperature of the mixed gas decreases, water vapor in the mixed gas condenses into liquid water when the temperature is below the freezing point. As another example, the filtrate structure 52 can be configured as a multi-layer water filter screen. The water filter screen can accelerate the condensation and precipitation of water vapor. When the mixed gas passes through the multi-layer water filter screen, the water vapor can condense into liquid water and be released.

[0042] In some embodiments of the present invention, such as Figure 2As shown, at least part of the gas flow channel 513 is constructed as a variable diameter section, and the cross-sectional area of ​​the variable diameter section gradually decreases from the device inlet 511 to the device outlet 512.

[0043] A portion of the gas flow channel 513 can be constructed as a variable diameter section, or the entire gas flow channel 513 can be constructed as a variable diameter pipeline. This application uses a portion of the gas flow channel 513 constructed as a variable diameter section as an example for explanation. From the device inlet 511 to the device outlet 512 (i.e., the flow direction of the mixed gas), the cross-sectional area of ​​the variable diameter section gradually decreases. As the cross-sectional area of ​​the variable diameter section gradually decreases, the flow velocity of the mixed gas within the variable diameter section gradually increases, which can accelerate the precipitation of water vapor in the mixed gas. By setting a variable diameter section within the gas flow channel 513, the precipitation efficiency of water vapor in the mixed gas can be improved, which is beneficial to increasing the precipitation rate of water vapor in the mixed gas within the gas flow channel 513, reducing the humidity of the mixed gas entering the engine cylinder 200, thereby ensuring the safe combustion of the mixed gas within the engine cylinder 200.

[0044] In some embodiments of the present invention, such as Figure 2 As shown, the filtrate structure 52 is located within the variable diameter section.

[0045] Water vapor in the mixed gas can be accelerated to precipitate in the variable diameter section. The filtrate structure 52 is set in the variable diameter section to further accelerate the condensation and precipitation of water vapor in the mixed gas, thereby effectively improving the precipitation efficiency and precipitation rate of water vapor in the mixed gas.

[0046] In some embodiments of the present invention, such as Figure 2 As shown, the gas-liquid separation device 50 may further include: a liquid storage structure 53, which defines a liquid storage space 531, wherein the liquid separated when the gas flows through the filtrate structure 52 is suitable for flowing into the liquid storage space 531.

[0047] The liquid storage structure 53 defines a liquid storage space 531, where liquid water precipitated from the gas mixture can be stored. When the gas mixture flows through the liquid storage structure 53, the liquid water separated from the gas mixture can flow into the liquid storage space 531. By setting up the liquid storage space 531, the precipitated liquid water is stored within the liquid storage space 531, preventing liquid water from accumulating in the gas flow channel 513 and reducing the risk of liquid water flowing into the engine's intake manifold 220 when the vehicle experiences bumps, inclines, or other complex operating conditions.

[0048] In some embodiments of the present invention, such as Figure 2 As shown, the liquid storage structure 53 is located outside the device body 51, and the device body 51 has a liquid outlet that connects the liquid storage space 531 and the gas flow channel 513.

[0049] The liquid storage structure 53 is located outside the device body 51. The liquid storage structure 53 can be fixedly connected to the device body 51 by means of snap-fit, bolt connection, etc. The upper end of the liquid storage structure 53 is open to form a liquid inlet. The device body 51 has a liquid outlet, which is positioned opposite to the liquid inlet. The liquid outlet connects the liquid storage space 531 and the gas flow channel 513. Liquid water precipitated from the mixed gas in the gas flow channel 513 can flow into the liquid storage space 531 through the liquid outlet, thereby achieving the effect of collecting liquid water. As an example, the liquid outlet can be formed at the bottom of the device body 51, with the liquid storage structure 53 located below the device body 51. This allows liquid water to flow into the liquid storage space 531 under gravity, which improves the efficiency of liquid water flowing into the liquid storage space 531 and reduces the probability of liquid water accumulating in the gas flow channel 513 or flowing around.

[0050] In some embodiments of this application, such as Figure 3 As shown, a funnel-shaped baffle 5311 can be installed in the liquid storage space 531. The baffle 5311 is annular and can be arranged around the liquid inlet of the liquid storage structure 53. The baffle 5311 can be fixed to the liquid storage structure 53 by welding, snap-fitting, or other methods. A first opening 5312 is formed at the lower end of the baffle 5311. Liquid water in the gas flow channel 513 can enter the liquid storage space 531 through the liquid outlet, the liquid inlet of the liquid storage structure 53, and the first opening 5312. The liquid water is stored below the baffle 5311 in the liquid storage space 531. The funnel-shaped baffle 5311 can prevent the liquid water in the liquid storage space 531 from flowing back into the gas flow channel 513 under complex working conditions such as vehicle bumps, uphill and downhill driving, without affecting the entry of liquid water into the liquid storage space 531, which helps to improve the reliability of the liquid storage structure 53.

[0051] In some embodiments of the present invention, such as Figure 2 As shown, the liquid outlet is located below the filtrate structure 52.

[0052] The mixed gas passes through the filtrate structure 52, where water vapor condenses into liquid water and is released. The liquid water flows into the storage space 531 from the gas channel 513 through the outlet. The outlet is located below the filtrate structure 52. When water vapor condenses into liquid water at the filtrate structure 52, the liquid water is discharged from the outlet under gravity, reducing the need for additional pumping and shortening the flow path from the liquid water's release into the gas channel 513, thus reducing liquid water loss during flow and improving the effective discharge rate of liquid water.

[0053] In some embodiments of the present invention, the bottom wall of the liquid storage structure 53 is provided with a drain port 532, and the drain port 532 is provided with an on / off valve 533, which is used to open or close the drain port 532.

[0054] When a certain amount of liquid water is stored in the liquid storage space 531, the liquid water needs to be drained to ensure that there is sufficient space in the liquid storage space 531 to store the continuously entering liquid water. This prevents excessive water accumulation in the liquid storage space 531 and overflow into the gas flow channel 513, thus enabling the liquid storage structure 53 to continuously store liquid water. A drain port 532 is formed on the bottom wall of the liquid storage structure 53, through which the liquid water in the liquid storage space 531 can be drained directly onto the ground. The drain port 532 is equipped with an on / off valve 533. By adjusting the opening and closing of the on / off valve 533, the drain port 532 can be opened or closed. When the on / off valve 533 is open, the drain port 532 is open, and liquid water can be discharged from the storage space 531 through the drain port 532. When the on / off valve 533 is closed, the drain port 532 is closed, and the liquid water is stored in the storage space 531.

[0055] In some embodiments of the present invention, the exhaust gas recirculation system 100 may further include: a liquid level sensor 534, which is disposed on the liquid storage structure 53 to detect the liquid level height in the liquid storage space 531. The liquid level sensor 534 and the on / off valve 533 are both adapted to communicate with the vehicle's controller so that the controller controls the on / off valve 533 to operate.

[0056] The liquid level sensor 534 can be a pressure water level sensor, optical liquid level sensor, or other sensor capable of determining the liquid level height. The liquid level sensor 534 can be fixedly connected to the liquid storage structure 53 by means of snap-fit, bolt connection, etc. The liquid level sensor 534 is located inside the liquid storage space 531 and can detect the liquid level height within the liquid storage space 531. The liquid level sensor 534 can communicate with the vehicle's controller, and the on / off valve 533 can also communicate with the vehicle's controller. The controller can obtain the detection information from the liquid level sensor 534 in real time. When the controller obtains detection information that the liquid water level detected by the liquid level sensor 534 exceeds a preset level, the controller controls the on / off valve 533 to open, draining the liquid water accumulated in the liquid storage space 531. When the controller obtains detection information that the liquid water has been drained, the controller controls the on / off valve 533 to close. Under other circumstances, the controller keeps the on / off valve 533 closed.

[0057] In some embodiments of the present invention, a throttle valve 230 may be provided between the intake manifold 220 and the gas-liquid separator 50. The throttle valve 230 can adjust the intake air volume entering the intake manifold 220, thereby adjusting the intake air volume entering the engine. The opening degree of the throttle valve 230 directly affects the engine's power output. The larger the opening degree of the throttle valve 230, the more intake air, the more fuel the engine burns, and the greater the power generated. Figure 4As shown, the throttle body 230 can be set at a height lower than that of the intake manifold 220 to prevent the throttle body 230 from affecting the return of liquid water in the exhaust manifold 210 to the gas-liquid separator 50.

[0058] In this embodiment, fresh air enters the intake manifold 220 after passing through the air filter 40, turbocharger 20, intercooler 30, and gas-liquid separator 50. The fresh air is burned in the engine cylinder 200. Part of the high-temperature exhaust gas produced by combustion enters the condenser 10 through the intake pipe 70, while the other part is catalyzed by the catalytic converter 60 and discharged into the atmosphere. The high-temperature exhaust gas is cooled in the condenser 10, and the cooled exhaust gas mixes with the fresh air to form a mixed gas. The mixed gas then passes through the turbocharger 20. The gas mixture is pressurized and heated, and then cooled in the intercooler 30. Water vapor in the cooled mixture is easily released. The mixture passes through a filter structure 52 located in the variable-diameter section of the gas-liquid separator 50. Water vapor in the mixture is cooled and released at the filter structure 52. The released liquid water flows into the storage space 531 through the outlet on the device body 51. The reduced humidity gas continues to flow towards the engine intake manifold 220, where it is burned in the engine cylinder 200. If water vapor in the mixture is further cooled and released in the intake manifold 220, the released liquid water flows back to the gas flow channel 513 in the gas-liquid separator 50 under gravity. The liquid water then flows into the storage space 531 through the outlet. When the liquid water in the storage space 531 reaches the preset level of the level sensor 534, the controller opens the on / off valve 533, discharging the accumulated liquid water from the storage space 531.

[0059] A vehicle according to a second aspect of the present invention includes the exhaust gas recirculation system 100 of the vehicle described in the above embodiments.

[0060] According to the embodiments of this application, the use of the exhaust gas recirculation system 100 in the above embodiments can ensure the combustion stability of the engine and improve the safety of the vehicle.

[0061] Other configurations and operations of the exhaust gas recirculation system 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vehicle exhaust gas recirculation system, characterized in that, include: A condenser (10), a turbocharger (20), an intercooler (30), and an air filter (40) are provided, wherein the turbocharger (20) is connected between the condenser (10) and the intercooler (30), and the condenser (10) is used to connect to the exhaust manifold (210) of the engine of the vehicle, and the air filter (40) is connected to the turbocharger (20). A gas-liquid separator (50) having a device inlet (511) and a device outlet (512), the device inlet (511) being connected to the intercooler (30), the device outlet (512) being adapted to be connected to the intake manifold (220) of the engine, and the device outlet (512) being adapted to be lower than the installation height of the intake manifold (220); The intake manifold (220) is inclined along the flow direction of the mixed gas, and the inlet of the intake manifold (220) is lower than the outlet of the intake manifold (220). The gas-liquid separation device (50) includes: a device body (51) and a filtrate structure (52). The device body (51) defines a gas flow channel (513). The device body (51) has a device inlet (511) and a device outlet (512). The gas flow channel (513) connects the device inlet (511) and the device outlet (512). The filtrate structure (52) is disposed within the gas flow channel (513). At least a portion of the gas flow channel (513) is constructed as a variable diameter section, and the cross-sectional area of ​​the variable diameter section gradually decreases from the device inlet (511) to the device outlet (512). The filtrate structure (52) is located within the variable diameter section, and the filtrate structure (52) is constructed as a multi-layer water filter screen; The gas-liquid separation device (50) further includes: a liquid storage structure (53) defining a liquid storage space (531), wherein the liquid separated when the gas flows through the filtrate structure (52) is suitable to flow into the liquid storage space (531), and a funnel-shaped baffle (5311) is provided in the liquid storage space (531), the baffle (5311) being arranged around the liquid inlet of the liquid storage structure (53).

2. The vehicle exhaust gas recirculation system according to claim 1, characterized in that, The liquid storage structure (53) is located outside the device body (51), and the device body (51) has a liquid outlet that connects the liquid storage space (531) and the gas flow channel (513).

3. The vehicle exhaust gas recirculation system according to claim 2, characterized in that, The outlet is located below the filtrate structure (52).

4. The vehicle exhaust gas recirculation system according to claim 1, characterized in that, The bottom wall of the liquid storage structure (53) is provided with a drain port (532), and the drain port (532) is provided with an on / off valve (533), which is used to open or close the drain port (532).

5. The vehicle exhaust gas recirculation system according to claim 4, characterized in that, Also includes: A liquid level sensor (534) is disposed on the liquid storage structure (53) to detect the liquid level height in the liquid storage space (531). The liquid level sensor (534) and the on / off valve (533) are both adapted to communicate with the vehicle controller so that the controller controls the operation of the on / off valve (533).

6. A vehicle, characterized in that, The vehicle includes an exhaust gas recirculation system (100) according to any one of claims 1-5.

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