Exhaust gas recirculation system of engine, engine and vehicle

Abstract

The invention discloses an exhaust gas recirculation system of an engine, the engine and a vehicle, and relates to the technical field of engines, the exhaust gas recirculation system comprises a supercharger, a first communicating pipe, a liquid collecting device and an atomizing device, the supercharger comprises a turbine and a gas compressor, an inlet of the turbine communicates with an exhaust manifold of the engine, and an outlet of the turbine communicates with an exhaust manifold of the engine; the turbine outlet is communicated with the atmospheric environment, the turbine outlet is communicated with a gas compressor inlet of the gas compressor, the gas compressor inlet is further communicated with the atmospheric environment, the first communicating pipe is communicated with the gas compressor outlet of the gas compressor and an intake manifold of the engine, and the liquid collecting device is arranged on the first communicating pipe and collects liquid flowing into the first communicating pipe. The atomization device is communicated with the liquid collecting device, and liquid in the liquid collecting device is atomized and sprayed into a cylinder body of the engine through the atomization device. Therefore, combustion stability and fuel economy of the engine can be improved, ignition difficulty of the engine is avoided, and the risk that liquid and engine oil form an emulsion can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an exhaust gas recirculation system of an engine, an engine and a vehicle. Background Art

[0002] In the related technology, the engine exhaust gas contains a large amount of water vapor. An excessively high EGR rate (exhaust gas recirculation rate) will cause supersaturation of water vapor in the engine intake system, thereby generating liquid water. The liquid water enters the engine combustion chamber with the intake air, causing unstable combustion, reduced fuel economy, and even ignition difficulties. In addition, the precipitated liquid water also has the risk of forming an emulsion with the engine oil caused by the large tortuous load in the intake air, thereby blocking the intake duct. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an exhaust gas recirculation system for an engine, which can improve the combustion stability and fuel economy of the engine, avoid engine ignition difficulties, and reduce the risk of emulsions between liquid and engine oil.

[0004] The present invention further provides an engine having the exhaust gas recirculation system.

[0005] The present invention further provides a vehicle having the above engine.

[0006] According to an embodiment of the present invention, the exhaust gas recirculation system of the engine includes: a supercharger, the supercharger includes a turbine and a compressor, the turbine inlet of the turbine is suitable for communicating with the exhaust manifold of the engine, the turbine outlet of the turbine is suitable for communicating with the atmospheric environment, the turbine outlet is connected to the compressor inlet of the compressor, and the compressor inlet is also suitable for communicating with the atmospheric environment; a first connecting pipe, the first connecting pipe connects the compressor outlet of the compressor and the intake manifold of the engine; a liquid collecting device, the liquid collecting device is arranged on the first connecting pipe, the liquid collecting device is used to collect liquid flowing into the first connecting pipe; an atomizing device, the atomizing device is connected to the liquid collecting device, and the atomizing device is used to atomize the liquid in the liquid collecting device and spray it into the cylinder body of the engine.

[0007] According to the exhaust gas recirculation system of the engine of the embodiment of the present invention, the liquid flowing into the first connecting pipe is collected by the liquid collecting device, and the liquid in the exhaust gas can be separated. The atomizing device is connected to the liquid collecting device, and the atomizing device is used to atomize the liquid in the liquid collecting device and spray it into the cylinder body of the engine, which can reduce the risk of liquid entering the cylinder body of the engine, thereby improving the combustion stability of the engine, avoiding engine ignition difficulties, improving the fuel economy of the engine, and reducing the risk of liquid and engine oil forming an emulsion.

[0008] According to some embodiments of the present invention, the liquid collection device includes: a liquid storage tank and a liquid collecting piece, the bottom wall of the first connecting tube is formed with a first connecting port, the liquid storage tank has a second connecting port, the liquid storage tank is located below the first connecting tube, the second connecting port and the first connecting port are arranged correspondingly, and the liquid collecting piece is arranged in the first connecting tube and corresponds to the first connecting port.

[0009] According to some embodiments of the present invention, the liquid collecting member is disposed through the first connecting port and the second connecting port to extend into the liquid storage tank.

[0010] According to some embodiments of the present invention, the liquid collecting member is a filter screen.

[0011] According to some embodiments of the present invention, the liquid storage tank is fixedly mounted on the first connecting pipe.

[0012] According to some embodiments of the present invention, the exhaust gas recirculation system also includes: a liquid level detection component, which is arranged in a liquid storage tank to detect the liquid level height in the liquid storage tank. The liquid storage tank has a drain port, and the drain port is provided with a drain valve. The drain valve is controlled to be opened or closed according to the detection information of the liquid level detection component.

[0013] According to some embodiments of the present invention, a third connecting port is provided on the bottom wall of the liquid storage tank, and the third connecting port is connected to the atomizing device.

[0014] According to some embodiments of the present invention, the atomizing device includes: an atomizing nozzle and a driving pump, the driving pump is connected between the atomizing nozzle and the liquid collecting device, the driving pump is used to pump the liquid in the liquid collecting device into the atomizing nozzle, and the atomizing nozzle is used to atomize the liquid and spray it into the corresponding cylinder.

[0015] According to some embodiments of the present invention, there are multiple atomizing nozzles, and the multiple atomizing nozzles are arranged in parallel.

[0016] An engine according to an embodiment of the present invention comprises the exhaust gas recirculation system of the engine of the above embodiment.

[0017] A vehicle according to an embodiment of the present invention includes the engine of the above embodiment.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 Schematic diagram of the structure of the exhaust gas recirculation system according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Exhaust gas recirculation system 100;

[0023] Turbine 10; turbine inlet 101; turbine outlet 102;

[0024] Compressor 11; compressor inlet 111; compressor outlet 112;

[0025] A first connecting pipe 20; a first connecting port 21;

[0026] Liquid collecting device 30;

[0027] Liquid storage tank 31; second connection port 311; third connection port 312;

[0028] Liquid collecting part 32; Intercooler 33;

[0029] Atomizing device 40; Atomizing nozzle 41;

[0030] Intake manifold 50; Exhaust manifold 51;

[0031] Cooler 60; flow valve 61; exhaust pipe 62;

[0032] Processor 70. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] Reference below Figure 1 An exhaust gas recirculation system 100 of an engine, an engine, and a vehicle according to an embodiment of the present invention are described.

[0035] The exhaust gas recirculation system 100 of an engine according to an embodiment of the present invention comprises: a supercharger, the supercharger comprises a turbine 10 and a compressor 11, the turbine inlet 101 of the turbine 10 is suitable for communicating with the exhaust manifold 51 of the engine, the turbine outlet 102 of the turbine 10 is suitable for communicating with the atmospheric environment, the turbine outlet 102 is connected to the compressor inlet 111 of the compressor 11, and the compressor inlet 111 is also suitable for communicating with the atmospheric environment; a first connecting pipe 20, the first connecting pipe 20 connects the compressor outlet 112 of the compressor 11 and the intake manifold 50 of the engine; a liquid collecting device 30, the liquid collecting device 30 is arranged on the first connecting pipe 20, and the liquid collecting device 30 is used to collect the liquid flowing into the first connecting pipe 20; an atomizing device 40, the atomizing device 40 is connected to the liquid collecting device 30, and the atomizing device 40 is used to atomize the liquid in the liquid collecting device 30 and spray it into the cylinder body of the engine.

[0036] The supercharger includes a turbine 10 and a compressor 11. The turbine 10 is the power part of the supercharger. The exhaust gas discharged by the engine is used to drive the turbine 10 to rotate. The turbine inlet 101 of the turbine 10 is suitable for communicating with the exhaust manifold 51 of the engine, so that the exhaust gas discharged by the engine can enter the turbine 10 through the exhaust manifold 51 of the engine and drive the turbine 10 to rotate. The turbine outlet 102 of the turbine 10 is suitable for communicating with the atmospheric environment, so that the exhaust gas of the engine can be discharged into the atmospheric environment.

[0037] The compressor 11 is driven to rotate by the turbine 10, and the turbine 10 drives the compressor 11 to compress the inhaled gas to increase the intake pressure, thereby increasing the intake volume of the engine. The turbine outlet 102 is connected to the compressor inlet 111 of the compressor 11, so that the compressor 11 can receive part of the exhaust gas through the turbine outlet 102, and the compressor inlet 111 is also suitable for connecting with the atmospheric environment, so that the compressor 11 can inhale fresh air through the atmospheric environment.

[0038] The first connecting pipe 20 connects the compressor outlet 112 of the compressor 11 and the intake manifold 50 of the engine, so that the gas (exhaust gas, air) compressed by the compressor 11 enters the engine cylinder for combustion. The exhaust gas generated during the operation of the engine may contain liquid substances, such as incompletely burned fuel, liquid water, water vapor, etc. The liquid re-enters the engine through circulation, which will have an adverse effect on the performance of the engine. By arranging the liquid collecting device 30 in the first connecting pipe 20, the liquid collecting device 30 is used to collect the liquid flowing into the first connecting pipe 20, which can effectively separate the liquid from the exhaust gas, thereby preventing the liquid from entering the engine, thereby ensuring the normal operation of the engine and avoiding engine ignition difficulties, unstable combustion and even flameout. The atomizing device 40 is connected to the liquid collecting device 30 so that the atomizing device 40 can atomize the liquid in the liquid collecting device 30 and spray it into the cylinder of the engine, which can increase the humidity in the engine cylinder, reduce the combustion temperature, and ensure that the liquid is evenly distributed in extremely small particles. The atomized liquid can be fully mixed with the air to form a more stable combustible mixture, thereby improving the combustion stability and fuel economy of the engine. In addition, the liquid is separated from the exhaust gas and atomized by the liquid collecting device 30, which can maintain the purity and stable performance of the fuel, thereby reducing the risk of emulsions between the liquid and the engine oil.

[0039] Therefore, through the combined application of the liquid collection device 30 and the atomization device 40, the risk of liquid entering the engine can be reduced at a higher EGR rate (exhaust gas recirculation rate), the combustion efficiency and stability of the engine can be improved, the service life of the engine can be effectively extended, and the operating cost and maintenance difficulty can be reduced.

[0040] According to the exhaust gas recirculation system 100 of the engine according to the embodiment of the present invention, the liquid flowing into the first connecting pipe 20 is collected by the liquid collecting device 30, so that the liquid in the exhaust gas can be separated. The atomizing device 40 is connected to the liquid collecting device 30, and the atomizing device 40 is used to atomize the liquid in the liquid collecting device 30 and spray it into the cylinder body of the engine, which can reduce the risk of liquid entering the cylinder body of the engine, thereby improving the combustion stability of the engine, avoiding engine ignition difficulties, improving the fuel economy of the engine, and reducing the risk of liquid and engine oil forming an emulsion.

[0041] According to some embodiments of the present invention, Figure 1 As shown, the liquid collection device 30 includes: a liquid storage tank 31 and a liquid collecting piece 32. The bottom wall of the first connecting tube 20 is formed with a first connecting port 21. The liquid storage tank 31 has a second connecting port 311. The liquid storage tank 31 is located below the first connecting tube 20. The second connecting port 311 and the first connecting port 21 are arranged correspondingly. The liquid collecting piece 32 is arranged in the first connecting tube 20 and corresponds to the first connecting port 21.

[0042] The liquid collecting device 30 includes: a liquid storage tank 31 and a liquid collecting member 32. The liquid collecting member 32 is used to collect liquid, and the liquid storage tank 31 is used to store the liquid collected by the liquid collecting member 32. The bottom wall of the first connecting pipe 20 is formed with a first connecting port 21, and the liquid storage tank 31 has a second connecting port 311. The liquid storage tank 31 is located below the first connecting pipe 20, which is conducive to the natural flow of liquid due to gravity, thereby facilitating the liquid in the first connecting pipe 20 to flow smoothly into the liquid storage tank 31. The second connecting port 311 and the first connecting port 21 are correspondingly arranged to ensure that the liquid in the first connecting pipe 20 can flow into the liquid storage tank 31 from the first connecting port 21 and the second connecting port 311. The liquid collecting member 32 is arranged in the first connecting pipe 20 and corresponds to the first connecting port 21, so that the liquid collected by the liquid collecting member 32 flows into the liquid storage tank 31 from the first connecting port 21 and the second connecting port 311.

[0043] Furthermore, the first connecting pipe 20 connects the compressor outlet 112 of the compressor 11 and the intake manifold 50 of the engine. When the exhaust gas enters the first connecting pipe 20, the liquid collecting part 32 can collect the liquid in the exhaust gas at the first connecting port 21. The first connecting port 21 corresponds to the second connecting port 311 of the liquid storage tank 31 and is tightly connected, so that the collected liquid can flow into the liquid storage tank 31 from the second connecting port 311, thereby effectively separating the liquid in the exhaust gas to prevent the liquid from directly entering the engine, thereby ensuring the normal operation of the engine and avoiding engine ignition difficulties, unstable combustion and even flameout.

[0044] It can be explained that the shape of the liquid collecting piece 32 can be conical, mesh, flat, or the shape of the liquid collecting piece 32 can also be adapted to the shape of the first connecting tube 20, so that the liquid collecting piece 32 can cover a larger area as much as possible to collect more liquid, thereby improving the liquid collection efficiency of the liquid collecting piece 32, and further reducing the risk of liquid directly entering the engine.

[0045] According to some embodiments of the present invention, Figure 1 As shown, the liquid collecting piece 32 is passed through the first connecting port 21 and the second connecting port 311 to extend into the liquid storage tank 31, so that the liquid collected by the liquid collecting piece 32 in the first connecting tube 20 can flow directly into the liquid storage tank 31, so that the liquid does not need to pass through additional pipes or interfaces during the flow process, which not only helps to reduce the risk of leakage of the liquid during the transmission process, but also reduces the transmission resistance of the liquid, helps the liquid to flow into the liquid storage tank 31 more smoothly and quickly, and improves the transmission rate of the liquid. In addition, such a simple structure can make the exhaust gas recirculation system 100 more compact and easy to maintain, and can also reduce the manufacturing cost and complexity of the exhaust gas recirculation system 100.

[0046] According to some embodiments of the present invention, the liquid collecting part 32 can be a filter net, so that the liquid collecting part 32 can effectively separate the liquid in the exhaust gas, and the liquid collecting part 32 can also effectively filter out impurities and particulate matter in the exhaust gas, which can not only prevent the liquid, impurities and particulate matter from entering the engine, further reducing the risk of engine damage or unstable combustion, and further improving the operating stability and service life of the engine, but also improve the purity of the liquid, which is beneficial to the subsequent utilization of the liquid.

[0047] According to some embodiments of the present invention, Figure 1 As shown, the liquid storage tank 31 is fixedly mounted on the first connecting tube 20. For example, the liquid storage tank 31 and the first connecting tube 20 can be integrally formed, or the liquid storage tank 31 and the first connecting tube 20 can be connected by bonding. However, the present invention is not limited to this. The liquid storage tank 31 and the first connecting tube 20 can also be fixedly connected by other means, as long as the liquid storage tank 31 is fixedly mounted on the first connecting tube 20.

[0048] The liquid storage tank 31 is fixedly arranged on the first connecting pipe 20, which can reduce the relative distance between the liquid storage tank 31 and the first connecting pipe 20 and the required connecting pipeline, which can not only reduce the risk of leakage, but also simplify the maintenance and management of the liquid storage tank 31 and the first connecting pipe 20, and can also make the overall layout of the exhaust gas recirculation system 100 more compact, which helps to reduce the space occupancy rate of the exhaust gas recirculation system 100. In addition, the liquid storage tank 31 is fixedly arranged on the first connecting pipe 20, which can make the connection between the liquid storage tank 31 and the first connecting pipe 20 firm, and can reduce the looseness or leakage caused by factors such as vibration, impact or temperature change, so that the exhaust gas recirculation system 100 can maintain stable performance even in harsh working environments.

[0049] According to some embodiments of the present invention, the exhaust gas recirculation system 100 may further include: a liquid level detection component, which is arranged in the liquid storage tank 31 to detect the liquid level height in the liquid storage tank 31, and the liquid storage tank 31 has a drain port, and the drain port is provided with a drain valve, and the drain valve is controlled to be opened or closed according to the detection information of the liquid level detection component.

[0050] The liquid level detection member may be a structure such as a liquid level sensor or a float, and the liquid level detection member is disposed in the liquid storage tank 31. For example, the liquid level detection member and the liquid storage tank 31 may be fixedly connected by bonding, or the liquid level detection member and the liquid storage tank 31 may be fixedly connected by snapping, but the present invention is not limited thereto. The liquid level detection member and the liquid storage tank 31 may also be fixedly connected by other means, as long as the liquid level detection member is disposed in the liquid storage tank 31. The liquid level detection member may be used to detect the liquid level height in the liquid storage tank 31 in real time, and can ensure the normal operation of the exhaust gas recirculation system 100 and prevent the liquid in the liquid storage tank 31 from overflowing or drying up.

[0051] The liquid storage tank 31 may have a liquid discharge port, and the liquid discharge port is provided with a liquid discharge valve. The exhaust gas recirculation system 100 may have a controller, and the controller is in communication with the liquid level detection element. The controller can control the liquid discharge valve to open or close according to the detection information of the liquid level detection element. For example, when the liquid level in the liquid storage tank 31 is higher than the first preset height value, the controller can control the liquid discharge valve to open according to the detection information of the liquid level detection element, and discharge the liquid in the liquid storage tank 31. When the liquid level in the liquid storage tank 31 is lower than the second preset height value, the controller can control the liquid discharge valve to close according to the detection information of the liquid level detection element, wherein the first preset height value is greater than the second preset height value, and the first preset height value can be 70% of the capacity of the liquid storage tank 31, and the second preset height value can be 40% of the capacity of the liquid storage tank 31. Such a setting can make the capacity of the liquid in the liquid storage tank 31 always at an appropriate capacity, thereby avoiding the liquid in the liquid storage tank 31 from overflowing or drying up and causing adverse effects on the exhaust gas recirculation system 100, thereby improving the safety and reliability of the exhaust gas recirculation system 100.

[0052] It can be explained that the first preset height value and the second preset height value can be reasonably set according to actual conditions.

[0053] According to some embodiments of the present invention, Figure 1 As shown, the bottom wall of the liquid storage tank 31 may be provided with a third connection port 312, and the third connection port 312 is connected to the atomizing device 40, so that the liquid in the liquid storage tank 31 can flow into the atomizing device 40 through the third connection port 312, and then the atomizing device 40 can convert the liquid into fine droplets and spray them into the corresponding cylinder body to participate in combustion. And the third connection port 312 is provided on the bottom wall of the liquid storage tank 31, which is conducive to the gravity to promote the natural flow of the liquid, so that the liquid flows into the atomizing device 40 more smoothly.

[0054] According to some embodiments of the present invention, Figure 1 As shown, the atomizing device 40 includes: an atomizing nozzle 41 and a driving pump. The driving pump is connected between the atomizing nozzle 41 and the liquid collecting device 30. The driving pump is used to pump the liquid in the liquid collecting device 30 into the atomizing nozzle 41. The atomizing nozzle 41 is used to atomize the liquid and spray it into the corresponding cylinder.

[0055] Among them, the atomizing nozzle 41 can be a pressure type, ultrasonic type, rotary type, etc., and can be reasonably selected according to the atomization requirements of the liquid. It is not specifically limited here. The atomizing nozzle 41 can convert the liquid into fine droplets and spray them into the corresponding cylinder. The driving pump can be an electric pump, a pneumatic pump, a hydraulic pump, etc. The driving pump is connected between the atomizing nozzle 41 and the liquid collecting device 30. The driving pump is used to pump the liquid in the liquid collecting device 30 into the atomizing nozzle 41, so that the atomizing nozzle 41 can obtain enough liquid for atomization.

[0056] Furthermore, when the exhaust gas recirculation system 100 is running, the driving pump will start and pump the liquid in the liquid collection device 30 into the atomizing nozzle 41. After receiving the liquid, the atomizing nozzle 41 will use its own atomization mechanism to convert the liquid into fine droplets, and spray them into the corresponding cylinder through the nozzle, which can increase the humidity in the engine cylinder and reduce the combustion temperature. It can also ensure that the liquid is evenly distributed in the form of extremely small particles, and the atomized liquid can be fully mixed with the air to form a more stable combustible mixture, thereby improving the combustion stability and fuel economy of the engine.

[0057] According to some embodiments of the present invention, Figure 1 As shown, there may be a plurality of atomizing nozzles 41, and the plurality of atomizing nozzles 41 are arranged in parallel.

[0058] Among them, the atomizing nozzle 41 can be multiple, for example: there can be two, three, four, etc., or other numbers of atomizing nozzles 41, but the present invention is not limited thereto, and there can also be other numbers of atomizing nozzles 41, as long as there are multiple atomizing nozzles 41. As an example of the present application, there can be four atomizing nozzles 41, and the four atomizing nozzles 41 are arranged in parallel so that the four atomizing nozzles 41 can work at the same time, which can increase the atomization area to achieve a more uniform atomization effect, avoid local over-wetting or over-drying, and thus significantly improve the atomization efficiency. Moreover, the four atomizing nozzles 41 are arranged in parallel, and even if one of the atomizing nozzles 41 fails, the other atomizing nozzles 41 can still work normally, thereby improving the reliability and stability of the exhaust gas recirculation system 100.

[0059] According to some embodiments of the present invention, Figure 1 As shown, the exhaust gas recirculation system 100 may also include: an intercooler 33, which can cool the exhaust gas. The intercooler 33 is connected in series between the compressor outlet 112 and the first connecting pipe 20, so that the intercooler 33 connects the compressor outlet 112 and the first connecting pipe 20. The exhaust gas flows through the compressor 11 and is pressurized in the compressor 11, and then flows into the intercooler 33 from the compressor outlet 112. The intercooler 33 can cool the gas, so that the temperature of the gas drops significantly, and the liquid vapor saturation in the gas rises rapidly, and then the liquid collecting device 30 can collect the liquid flowing into the first connecting pipe 20, so that the cooled and filtered gas enters the engine, which can reduce the combustion temperature in the engine cylinder, contribute to the stable combustion of the engine, and can also reduce the temperature of the exhaust gas recirculation system 100, reduce the heat load of the engine, and help improve the engine performance.

[0060] According to some embodiments of the present invention, Figure 1As shown, the exhaust gas recirculation system 100 may also include: a cooler 60, which is connected between the turbine 10 and the compressor 11, so that the cooler 60 can cool the exhaust gas discharged by the turbine 10, reduce the exhaust gas temperature, and help reduce nitrogen oxides in the exhaust gas. After the exhaust gas is mixed with air and re-enters the engine, it can also increase the amount of oxygen in the engine cylinder, help improve the combustion efficiency of the engine, help improve the fuel economy of the vehicle, and also help improve the reliability of the exhaust gas recirculation system 100.

[0061] According to some embodiments of the present invention, Figure 1 As shown, the exhaust gas recirculation system 100 may also include: a flow valve 61, which is connected in series between the cooler 60 and the compressor 11. The flow valve 61 can accurately control the amount of exhaust gas recirculated to the compressor 11. The inlet of the flow valve 61 is connected to the outlet of the cooler 60. The cooled exhaust gas flows through the flow valve 61 into the compressor 11. The density of the cooled exhaust gas increases and the flow performance is improved, which helps the flow valve 61 to more accurately control the amount of exhaust gas entering the compressor 11. The flow valve 61 can control the amount of exhaust gas entering the compressor 11 according to different operating conditions of the engine to achieve better emission control and performance of the engine.

[0062] According to some embodiments of the present invention, Figure 1 As shown, the exhaust gas recirculation system 100 may also include: an exhaust pipe 62, the exhaust pipe 62 is connected to the turbine outlet 102, the exhaust pipe 62 connects the turbine outlet 102 and the atmospheric environment, and the exhaust pipe 62 is provided with a processor 70, the processor 70 is used to process the exhaust gas, a part of the exhaust gas generated by the engine enters the exhaust pipe 62 via the turbine 10, the exhaust pipe 62 is provided with a processor 70, the processor 70 can process the exhaust gas, reduce harmful pollutants in the exhaust gas, improve the cleanliness of vehicle emissions, and protect the environment.

[0063] The engine according to the embodiment of the present invention, including the exhaust gas recirculation system 100 of the engine of the above-mentioned embodiment, can achieve higher fuel economy without affecting the normal combustion in the cylinder of the engine, and can also reduce the risk of liquid entering the crankcase and forming an emulsion with the engine oil to block the intake duct.

[0064] The vehicle according to the embodiment of the present invention, including the engine of the above embodiment, can achieve higher fuel economy without affecting the normal combustion in the cylinder of the engine, and can also reduce the risk of liquid entering the crankcase and forming an emulsion with the engine oil to block the intake duct.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An exhaust gas recirculation system for an engine, characterized in that: include: A supercharger, the supercharger comprising a turbine and a compressor, the turbine inlet of the turbine being adapted to communicate with the exhaust manifold of the engine, the turbine outlet of the turbine being adapted to communicate with the atmosphere, the turbine outlet being adapted to communicate with the compressor inlet of the compressor, and the compressor inlet being adapted to communicate with the atmosphere; A first connecting pipe, wherein the first connecting pipe connects a compressor outlet of the compressor and an intake manifold of the engine; a liquid collecting device, the liquid collecting device being arranged in the first communicating tube and being used for collecting the liquid flowing into the first communicating tube; An atomizing device is connected to the liquid collecting device and is used to atomize the liquid in the liquid collecting device and spray it into the cylinder body of the engine.

2. The exhaust gas recirculation system of the engine according to claim 1, characterized in that: The liquid collection device includes: a liquid storage tank and a liquid collecting piece, the bottom wall of the first connecting tube is formed with a first connecting port, the liquid storage tank has a second connecting port, the liquid storage tank is located below the first connecting tube, the second connecting port and the first connecting port are arranged correspondingly, and the liquid collecting piece is arranged in the first connecting tube and corresponds to the first connecting port.

3. The exhaust gas recirculation system of the engine according to claim 2, characterized in that: The liquid collecting member is arranged through the first connecting port and the second connecting port to extend into the liquid storage tank.

4. The exhaust gas recirculation system of the engine according to claim 2, characterized in that: The liquid collecting part is a filter screen.

5. The exhaust gas recirculation system of the engine according to claim 2, characterized in that: The liquid storage tank is fixedly arranged on the first connecting pipe.

6. The exhaust gas recirculation system of the engine according to claim 2, characterized in that: Also includes: A liquid level detection component is arranged in the liquid storage tank to detect the liquid level height in the liquid storage tank. The liquid storage tank has a liquid discharge port, and the liquid discharge port is provided with a liquid discharge valve. The liquid discharge valve is controlled to be opened or closed according to the detection information of the liquid level detection component.

7. The exhaust gas recirculation system of the engine according to claim 2, characterized in that: The bottom wall of the liquid storage tank is provided with a third connecting port, and the third connecting port is communicated with the atomizing device.

8. The exhaust gas recirculation system of an engine according to any one of claims 1 to 7, characterized in that: The atomizing device comprises: an atomizing nozzle and a driving pump, wherein the driving pump is connected between the atomizing nozzle and the liquid collecting device, and the driving pump is used to pump the liquid in the liquid collecting device into the atomizing nozzle, and the atomizing nozzle is used to atomize the liquid and spray it into the corresponding cylinder body.

9. The exhaust gas recirculation system of the engine according to claim 6, characterized in that: There are multiple atomizing nozzles, and the multiple atomizing nozzles are arranged in parallel.

10. An engine, characterized in that: An exhaust gas recirculation system comprising an engine according to any one of claims 1-9.

11. A vehicle, characterized in that: Comprising an engine according to claim 10.

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