Vehicle and waste gas circulating system of engine of vehicle

Abstract

The invention discloses a vehicle and an exhaust gas circulation system of an engine of the vehicle, and relates to the technical field of engines. The engine comprises a combustion chamber, an intake manifold and an exhaust manifold. A waste gas circulation system of the engine comprises a supercharging device, an intercooling device and a water control device. The supercharging device is used for mixing waste gas exhausted by the exhaust manifold with air in the external environment, compressing the waste gas and then outputting compressed gas. The intercooling device is used for cooling the compressed gas and outputting the cooled compressed gas; the water control device is used for separating out supersaturated water in the cooled compressed gas, discharging the cooled compressed gas from which the supersaturated water is separated to the air inlet manifold through the air nozzle, atomizing the supersaturated water, and releasing the atomized supersaturated water to the air inlet manifold through the spraying nozzle according to a set spraying amount; according to the technical scheme, the problem that liquid water in compressed gas enters the combustion chamber to cause unstable combustion is solved, and the fuel economy is improved on the premise that normal combustion is not affected.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of engine technology, and in particular to an exhaust gas circulation system of a vehicle and its engine. Background Art

[0002] In order to meet the increasingly stringent environmental standards for exhaust emissions, engines generally use high-pressure exhaust gas circulation technology, which reintroduces a portion of the exhaust gas emitted by the engine combustion into the intake manifold, mixes it with fresh air, and then re-enters the engine combustion chamber, thereby effectively lowering the combustion temperature and reducing the generation of nitrogen oxides.

[0003] However, in the prior art exhaust gas circulation system, since the exhaust gas discharged by the engine combustion carries water, when the liquid water in the exhaust gas directly enters the combustion chamber with the gas, it will cause unstable combustion and ignition difficulties, and will also cause corrosion and wear of the engine, seriously affecting the performance and reliability of the engine. Therefore, it is urgent to solve the technical problem of liquid water precipitated from the exhaust gas in the prior art exhaust gas circulation system causing engine combustion. Summary of the invention

[0004] The present invention provides an exhaust gas circulation system for a vehicle and its engine, so as to separate supersaturated water in the exhaust gas entering a combustion chamber, and atomize the supersaturated water and release it to an intake manifold through a spray port in a set spray amount, thereby improving the stability and economy of engine combustion.

[0005] A first aspect of the present invention provides an exhaust gas circulation system of an engine, the engine comprising a combustion chamber and an intake manifold and an exhaust manifold connected to the combustion chamber, the exhaust gas circulation system of the engine in the vehicle comprising: a supercharging device, an intercooling device and a water control device;

[0006] The first air inlet of the supercharging device is communicated with the exhaust manifold, the second air inlet of the supercharging device is communicated with the external environment, and the air outlet of the supercharging device is communicated with the air inlet of the intercooling device; the supercharging device is used to mix the exhaust gas discharged from the exhaust manifold with the air of the external environment and compress the mixed gas, and then output the compressed gas;

[0007] The air outlet of the intercooler is connected to the air inlet of the water control device; the intercooler is used to cool the compressed gas and output the cooled compressed gas;

[0008] The jet port and the spray port of the water control device are both connected to the intake manifold; the water control device is used to separate the supersaturated water in the cooled compressed gas, and discharge the cooled compressed gas with the supersaturated water separated from it to the intake manifold through the jet port, and atomize the supersaturated water and release it to the intake manifold through the spray port in a set spray amount.

[0009] Optionally, the exhaust gas circulation system of the engine further comprises: a circulation control device;

[0010] The circulation control device is disposed between the exhaust manifold and the first air inlet of the supercharging device, and is used to control the amount of exhaust gas discharged from the exhaust manifold that enters the supercharging device.

[0011] Optionally, the circulation control device includes an exhaust gas circulation control valve.

[0012] Optionally, the exhaust gas circulation system of the engine further includes: a first cooling device;

[0013] The first cooling device is arranged between the circulation control device and the exhaust manifold, and the air inlet of the first cooling device is connected to the exhaust manifold, and the air outlet of the first cooling device is connected to the first air inlet of the supercharging device; the first cooling device is used to cool the exhaust gas discharged from the exhaust manifold.

[0014] Optionally, the boosting device comprises a supercharger; the supercharger comprises a supercharger turbine and a supercharger compressor connected to each other;

[0015] The supercharger turbine is arranged between the first cooling device and the exhaust manifold; the supercharger compressor is used for mixing the exhaust gas and the air, and compressing the mixed gas and then outputting the compressed gas.

[0016] Optionally, the water control device includes a water separation mechanism, a water storage mechanism and a water release mechanism;

[0017] The air inlet of the water separation mechanism is communicated with the air outlet of the intercooler, the jet port of the water separation mechanism is communicated with the intake manifold, and the water outlet of the water separation mechanism is communicated with the water inlet of the water storage mechanism; the water separation mechanism is used to separate the supersaturated water in the cooled compressed gas, provide the supersaturated water to the water storage mechanism, and discharge the cooled compressed gas from which the supersaturated water is separated through the jet port to the intake manifold;

[0018] The water storage mechanism is used to store the supersaturated water;

[0019] The water inlet of the water release mechanism is connected to the water storage mechanism, and the spray port of the water release mechanism is connected to the intake manifold; the water release mechanism is used to atomize the supersaturated water stored in the water storage mechanism and release it to the intake manifold in the set atomization amount.

[0020] Optionally, the water separation mechanism includes at least one of a water-gas separation net and a water-gas separation pipeline.

[0021] Optionally, the water release mechanism comprises a vaporizer.

[0022] Optionally, the exhaust gas circulation system of the engine further includes: an exhaust gas treatment device;

[0023] The air inlet of the exhaust gas treatment device is connected to the exhaust manifold, and the air outlet of the exhaust gas treatment device is connected to the external environment; the exhaust gas treatment device is used to treat the exhaust gas that has not entered the supercharging device and discharge it into the external environment.

[0024] A second aspect of the present invention provides a vehicle comprising: an engine and an exhaust gas circulation system of the engine as described above.

[0025] The technical solution provided by the present invention is to set a supercharging device, an intercooling device and a water control device in the exhaust gas circulation system of the engine, so that the supercharging device can mix the exhaust gas discharged from the exhaust manifold with the air of the external environment and compress the mixed gas, and then output the compressed gas to the intercooling device. The intercooling device can cool the compressed gas and output the cooled compressed gas. The cooled compressed gas can separate supersaturated water through the water control device. The water control device discharges the cooled compressed gas separated from the supersaturated water through the jet port to the intake manifold, effectively solving the problem of liquid water in the compressed gas entering the combustion chamber and causing unstable combustion. At the same time, the water control device can also atomize the supersaturated water and release it to the intake manifold through the spray port at a set spray amount, thereby accurately controlling the water entering the combustion chamber for combustion, so as to obtain higher fuel economy without affecting normal combustion.

[0026] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a structural schematic diagram of an exhaust gas circulation system of an engine provided by an embodiment of the present invention;

[0029] Figure 2 It is a schematic structural diagram of another exhaust gas circulation system of an engine provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Figure 1 is a schematic diagram of the structure of an exhaust gas circulation system of an engine provided by an embodiment of the present invention, such as Figure 1As shown, the engine 1 includes a combustion chamber 2 and an intake manifold 3 and an exhaust manifold 4 connected to the combustion chamber 2. The exhaust gas circulation system of the engine in the vehicle includes: a supercharging device 5, an intercooling device 6 and a water control device 7; the first air inlet 501 of the supercharging device 5 is connected to the exhaust manifold 4, the second air inlet 502 of the supercharging device 5 is connected to the external environment, and the air outlet 503 of the supercharging device 5 is connected to the air inlet 601 of the intercooling device 6; the supercharging device 5 is used to mix the exhaust gas discharged from the exhaust manifold 4 with the air of the external environment and compress the mixed gas. Output compressed gas; the air outlet 602 of the intercooler 6 is connected with the air inlet 701 of the water control device 7; the intercooler 6 is used to cool the compressed gas and output the cooled compressed gas; the jet port 702 and the spray port 703 of the water control device 7 are both connected with the intake manifold 3; the water control device 7 is used to separate the supersaturated water in the cooled compressed gas, and discharge the cooled compressed gas separated with the supersaturated water to the intake manifold 3 through the jet port 702, and atomize the supersaturated water and release it to the intake manifold 3 through the spray port 703 with a set spray amount.

[0033] It is understandable that during the operation of the engine 1, the intake manifold 3 delivers gas to the combustion chamber 2 for combustion, and the combustion chamber 2 converts the energy generated by the combustion gas into mechanical energy to provide power for the engine 1, so that the engine 1 can drive the vehicle. The exhaust manifold 4 discharges the exhaust gas after combustion in the combustion chamber 2, and the exhaust gas discharged by the exhaust manifold 4 will enter the exhaust gas circulation system of the engine. After the exhaust gas is pressurized by the supercharging device 5, cooled by the intercooling device 6, and the supersaturated water is separated by the water control device 7, it will re-enter the combustion chamber 2 through the intake manifold 3 for combustion, completing the exhaust gas circulation process of the engine 1.

[0034] Continue to refer Figure 1 As shown, the first air inlet 501 of the supercharger 5 is connected to the exhaust manifold 4, and the exhaust gas discharged from the exhaust manifold 4 is provided to the supercharger 5, so that the exhaust gas can be reused. The second air inlet 502 of the supercharger 5 is connected to the external environment, so that the air from the external environment can be introduced to provide a certain gas environment for the re-combustion of the exhaust gas, so that when the mixed gas of air and exhaust gas is sent to the combustion chamber 2 for combustion, the temperature in the combustion chamber 2 can be reduced to reduce the generation of nitrogen oxides after the gas in the combustion chamber 2 is burned, thereby reducing the content of harmful gases in the exhaust gas discharged during the operation of the engine 1 and improving the environmental performance of the engine 1; the supercharger 5 mixes the exhaust gas discharged from the exhaust manifold 4 with the air in the external environment and compresses it, so that the compressed gas can have a higher pressure and a higher density, thereby improving the combustion efficiency of the engine 1; the compressed gas is transmitted to the air inlet 601 of the intercooler 6 through the air outlet 503 of the supercharger 5, so that it can be cooled by the intercooler 6.

[0035] Continue to refer Figure 1 As shown, the air outlet 602 of the intercooler 6 is connected to the air inlet 701 of the water control device 7. The intercooler 6 can use a cooling medium, such as water or air, to dissipate the heat of the compressed gas with a relatively high temperature output by the supercharging device 5 to reduce its temperature, and output the cooled compressed gas to the air inlet 701 of the water control device 7 through the air outlet 602. Cooling the compressed gas by the intercooler 6 can prevent the overheated compressed gas from damaging the water control device 7; at the same time, the supersaturation of the compressed gas after cooling is reduced, which can effectively reduce the moisture content in the compressed gas, and help to quickly condense the water vapor in the compressed gas into liquid water, so that after the compressed gas cooled by the intercooler 6 is output to the water control device 7, the water control device 7 can more effectively separate the supersaturated water in the compressed gas, so that the cooled compressed gas entering the combustion chamber 2 does not contain supersaturated water, thereby improving the stability and reliability of the exhaust gas circulation system of the engine.

[0036] Continue to refer Figure 1 As shown, the jet port 702 and the spray port 703 of the water control device 7 are both connected to the intake manifold 3. The water control device 7 is used to separate the supersaturated water in the compressed gas cooled by the intercooler 6, so that the jet port 702 of the water control device 7 discharges the cooled compressed gas with the supersaturated water separated to the intake manifold 3, so that the cooled compressed gas entering the combustion chamber 2 does not contain supersaturated water, so as to maintain the efficiency and stability of the combustion in the combustion chamber 2; at the same time, the supersaturated water separated from the cooled compressed gas is atomized by the water control device 7, and the spray amount can be set to be released to the intake manifold 3, so that the supersaturated water is integrated into the compressed gas in the form of mist, and enters the combustion chamber 2 through the intake manifold 3 for combustion, which helps to adjust the temperature and humidity of the gas entering the combustion chamber 2 for combustion and optimize the combustion process.

[0037] Among them, the set spray amount of supersaturated water atomized by the water control device 7 and released to the combustion chamber through the intake manifold can be determined according to the rotational speed of the engine 1. At this time, the engine controller can first obtain the current rotational speed of the engine and the mapping relationship between the rotational speed and the spray amount, and correspondingly control the spray amount of the atomized supersaturated water released by the spray port 703 of the water control device 7. This can accurately control the water entering the combustion chamber 2 for combustion, help lower the combustion temperature, reduce the generation of nitrogen oxides, thereby optimizing the combustion process, improving combustion efficiency, enhancing the stability of the operation of the engine 1, and reducing fuel consumption.

[0038] The technical solution provided by the present invention is to set a supercharging device, an intercooling device and a water control device in the exhaust gas circulation system of the engine, so that the supercharging device can mix the exhaust gas discharged from the exhaust manifold with the air of the external environment and compress the mixed gas, and then output the compressed gas to the intercooling device. The intercooling device can cool the compressed gas and output the cooled compressed gas. The cooled compressed gas can separate supersaturated water through the water control device. The water control device discharges the cooled compressed gas separated from the supersaturated water through the jet port to the intake manifold, effectively solving the problem of liquid water in the compressed gas entering the combustion chamber and causing unstable combustion. At the same time, the water control device can also atomize the supersaturated water and release it to the intake manifold through the spray port at a set spray amount, thereby accurately controlling the water entering the combustion chamber for combustion, so as to obtain higher fuel economy without affecting normal combustion.

[0039] Optional, Figure 2 FIG. 1 is a schematic diagram of the structure of another exhaust gas circulation system of an engine provided by an embodiment of the present invention. Figure 2 As shown, the exhaust gas circulation system of the engine also includes a circulation control device 8; the circulation control device 8 is arranged between the exhaust manifold 4 and the first air inlet 501 of the supercharging device 5, and the circulation control device 8 is used to control the amount of exhaust gas discharged from the exhaust manifold 4 entering the supercharging device 5.

[0040] Specifically, the circulation control device 8 is arranged between the exhaust manifold 4 and the first air inlet 501 of the supercharging device 5, and can control the amount of exhaust gas discharged from the exhaust manifold 4 that enters the supercharging device 5 for exhaust gas circulation, thereby realizing the recycling of exhaust gas, and the other part of the exhaust gas can be discharged into the external environment after being treated to maintain the balance and stability of the system. The amount of exhaust gas entering the exhaust gas circulation is precisely controlled by the circulation control device 8, so that the amount of exhaust gas entering the exhaust gas circulation can be adjusted in real time according to the working conditions of the engine 1, thereby improving the flexibility and stability of the exhaust gas circulation system of the engine.

[0041] Optionally, the circulation control device 8 includes an exhaust gas circulation control valve.

[0042] Specifically, the exhaust gas circulation control valve can be understood as a device in the circulation control device 8 for accurately controlling the amount of exhaust gas entering the supercharging device 5. The exhaust gas circulation control valve can include an electromagnet and a piston. The exhaust gas circulation control valve can be based on the engine operating conditions and the instructions of the engine's electronic control unit. When it is necessary to reduce the nitrogen oxide content generated by combustion in the combustion chamber 2 of the engine 1, the electromagnet is activated and generates a magnetic field to move the piston, thereby changing the opening degree of the solenoid valve, allowing a certain amount of exhaust gas to enter the exhaust gas circulation. By controlling the power-on state of the electromagnet, the amount of exhaust gas entering the supercharging device 5 in the exhaust gas discharged from the exhaust manifold 4 can be accurately adjusted. For example, when the engine needs to increase the power output, the solenoid valve is closed, and the exhaust gas recirculation will be stopped at this time. The exhaust gas circulation control valve can accurately control the amount of exhaust gas entering the supercharging device 5 in the exhaust gas discharged from the exhaust manifold 4, so as to achieve real-time adjustment of the amount of exhaust gas entering the exhaust gas circulation according to the operating conditions of the engine 1, thereby optimizing the combustion process, improving the combustion efficiency, and improving the flexibility and stability of the exhaust gas circulation system of the engine.

[0043] Optional, continue to refer to Figure 2 As shown, the exhaust gas circulation system of the engine also includes: a first cooling device 9; the first cooling device 9 is arranged between the circulation control device 8 and the exhaust manifold 4, and the air inlet 901 of the first cooling device 9 is connected to the exhaust manifold 4, and the air outlet 902 of the first cooling device 9 is connected to the first air inlet 501 of the supercharging device 5; the first cooling device 9 is used to cool the exhaust gas discharged from the exhaust manifold 4.

[0044] Specifically, the first cooling device 9 is arranged between the exhaust manifold 4 and the circulation control device 8, and the exhaust gas discharged from the combustion chamber 2 after combustion from the exhaust manifold 4 is output to the air inlet 901 of the first cooling device 9. The first cooling device 9 can use a cooling medium, such as water or air, to dissipate heat for the exhaust gas discharged from the combustion chamber 2 after combustion from the exhaust manifold 4 through heat transfer and heat exchange to reduce its temperature, and output the cooled exhaust gas to the first air inlet 501 of the supercharging device 5 through the air outlet 902 of the first cooling device to prevent overheated exhaust gas from damaging the supercharging device 5, so that the exhaust gas circulation system of the engine can operate more efficiently, thereby improving the stability and reliability of the exhaust gas circulation system.

[0045] Optional, continue to refer to Figure 2 As shown, the supercharging device 5 includes a supercharger 504; the supercharger includes a supercharger turbine 505 and a supercharger compressor 506 connected to each other; the supercharger turbine 505 is arranged between the first cooling device 9 and the exhaust manifold 4; the supercharger compressor 506 is used to mix the exhaust gas and air, and compress the mixed gas and then output the compressed gas.

[0046] Among them, the supercharger turbine 505 can be specifically understood as a rotating mechanical device driven by the kinetic energy of exhaust gas, which can include components such as turbine blades, bearings and housings. Specifically, when the exhaust gas discharged from the combustion chamber 2 after combustion from the exhaust manifold 4 is output to the supercharger turbine 505, the kinetic energy generated when the exhaust gas flows through the turbine blades is converted into mechanical energy, causing the turbine to rotate. The supercharger turbine 505 and the supercharger compressor 506 can be connected through bearings or intermediates. The rotation of the turbine can transfer the kinetic energy to the supercharger compressor 506. The supercharger compressor 506 converts the kinetic energy transferred by the turbine into a compression force on the mixed gas, realizes the mixing and compression of the exhaust gas and air, and outputs the compressed gas. The coordinated work of the supercharger turbine 505 and the supercharger compressor 506 effectively utilizes the kinetic energy of the exhaust gas, converts the kinetic energy of the exhaust gas into a compression force on the mixed gas, and improves the performance and efficiency of the engine's exhaust gas circulation system. The supercharger compressor 506 compresses the mixed gas to increase the density of the mixed gas, thereby optimizing the combustion process and improving the combustion efficiency.

[0047] Optional, continue to refer to Figure 2 As shown, the water control device 7 includes a water separation mechanism 704, a water storage mechanism 705 and a water release mechanism 706; the air inlet 707 of the water separation mechanism 704 is connected to the air outlet 602 of the intercooler 6, the jet port 708 of the water separation mechanism 704 is connected to the intake manifold 3, and the water outlet 709 of the water separation mechanism 704 is connected to the water inlet 710 of the water storage mechanism 705; the water separation mechanism 704 is used to separate the supersaturated water in the cooled compressed gas and extract the supersaturated water. The water storage mechanism 705 is supplied to the water storage mechanism 705, and the cooled compressed gas from which the supersaturated water is separated is sprayed and discharged into the intake manifold 3 through the jet port 708; the water storage mechanism 705 is used to store the supersaturated water; the water inlet 711 of the water release mechanism 706 is connected to the water storage mechanism 705, and the spray port 712 of the water release mechanism 706 is connected to the intake manifold 3; the water release mechanism 706 is used to atomize the supersaturated water stored in the water storage mechanism 705 and release it to the intake manifold 3 in a set atomization amount.

[0048] It can be understood that the separation mechanism 704 in the water control device 7 receives the cooled compressed gas output from the outlet 602 of the intercooler 6 through the air inlet 707, and separates the supersaturated water therein. The separated supersaturated water enters the water storage mechanism 705 through the water outlet 709, so that the cooled compressed gas entering the combustion chamber 2 does not contain supersaturated water, so as to maintain the efficiency and stability of the combustion in the combustion chamber 2; at the same time, the inside of the jet port 708 of the separation mechanism 704 can be kept clean and dry to avoid corrosion caused by moisture. The cooled compressed gas separated from the supersaturated water is sprayed into the intake manifold 3 through the jet port 708, and enters the combustion chamber 2 through the intake manifold for combustion.

[0049] The water storage mechanism 705 receives the supersaturated water discharged from the water outlet 709 of the water separation mechanism 704 through the water inlet 710 and stores it. The supersaturated water stored in the water storage mechanism 705 will be released into the intake manifold 3 again when needed according to the speed requirement of the engine 1. By storing the supersaturated water, the exhaust gas circulation system can provide additional water supply when needed, which helps to optimize the combustion process of the engine and improve the combustion efficiency. In an exemplary embodiment, the water storage mechanism 705 may include a water storage tank, etc.

[0050] The water inlet 711 of the water release mechanism 706 is connected to the water storage mechanism 705. The water release mechanism 706 atomizes the supersaturated water stored in the water storage mechanism 705, and releases the water to the intake manifold 3 through the spray port 712 of the water release mechanism 706 with the determined spray amount according to the spray amount required for combustion determined by the speed of the engine 1, and enters the combustion chamber 2 through the intake manifold 3, so that the supersaturated water is integrated into the compressed gas with the set spray amount, and enters the combustion chamber 2 through the intake manifold 3 for combustion, so that the water entering the combustion chamber 2 for combustion can be accurately controlled, which helps to reduce the combustion temperature and reduce the generation of nitrogen oxides, thereby optimizing the combustion process, improving the combustion efficiency, enhancing the stability of the operation of the engine 1, and reducing fuel consumption.

[0051] Optionally, the water separation mechanism 704 includes at least one of a water-gas separation net and a water-gas separation pipeline.

[0052] The water-gas separation net can be specifically understood as a mesh structure, which is used to capture water droplets when the cooled compressed gas output from the outlet 602 of the intercooler 6 flows through. When the cooled compressed gas passes through the water-gas separation net, the water droplets will condense or adsorb on the mesh structure, thereby separating supersaturated water from the gas. The water-gas separation pipeline can be specifically understood as inside the pipeline, through a series of designs and layouts, water droplets will condense or deposit on the wall of the pipeline, thereby achieving water-gas separation. Specifically, by making the water separation mechanism 704 include a water-gas separation net or a water-gas separation pipeline, supersaturated water in the cooled compressed gas is separated, so that the cooled compressed gas entering the combustion chamber 2 does not contain supersaturated water, so as to maintain the efficiency and stability of the combustion in the combustion chamber 2, and at the same time, the inside of the jet port 708 of the separation mechanism 704 can be kept clean and dry, avoiding corrosion caused by moisture, and ensuring the stable operation of the exhaust gas circulation system of the engine.

[0053] Optionally, water release mechanism 706 includes a vaporizer.

[0054] The carburetor may be specifically understood as a device that atomizes saturated water into a mist form and releases the mist in an appropriate amount into the intake manifold 3 . For example, the carburetor can utilize the throat effect to set up one or more gas channels with smaller cross-sections. A low-pressure area will be generated in the area with smaller cross-sections. The low-pressure area is connected to the water outlet of the water storage mechanism 705. When the water release mechanism 706 determines the amount of gas required for combustion according to the speed of the engine 1 and needs to release the supersaturated water in the form of mist to the intake manifold 3, the gas will be passed into the gas channel in the carburetor, and the supersaturated water stored in the water storage mechanism 705 will flow through the water outlet to the low-pressure area. At this time, the supersaturated water will be automatically sucked into the gas in the low-pressure area, and thus mixed into the gas in the form of mist. At the same time, the gas flow rate in the gas channel with a smaller cross-section is faster, which helps to disperse the water vapor and fully mix it with the compressed gas, and enter the combustion chamber 2 through the intake manifold 3 for combustion, so that the water entering the combustion chamber 2 for combustion can be accurately controlled, which helps to reduce the combustion temperature and reduce the generation of nitrogen oxides, thereby optimizing the combustion process, improving combustion efficiency, enhancing the stability of the engine 1 operation, and reducing fuel consumption.

[0055] Optional, continue to refer to Figure 2 As shown, the exhaust gas circulation system of the engine also includes an exhaust gas treatment device 10, the air inlet 1001 of the exhaust gas treatment device 10 is connected to the exhaust manifold 4, and the air outlet 1002 of the exhaust gas treatment device is connected to the external environment; the exhaust gas treatment device 10 is used to treat the exhaust gas that has not entered the supercharging device 5 and discharge it into the external environment.

[0056] Specifically, the circulation control device 8 is arranged between the exhaust manifold 4 and the first air inlet 501 of the supercharging device 5, and can control the amount of exhaust gas discharged from the exhaust manifold 4 that enters the supercharging device 5 for exhaust gas circulation, so that a part of the exhaust gas enters the supercharging device 5 through the circulation control device 8 for exhaust gas circulation, and the other part of the exhaust gas needs to be treated by the exhaust gas treatment device 10 and then discharged into the external environment. The exhaust gas treatment device 10 is connected to the exhaust manifold 4 through the air inlet 1001, and is used to treat the exhaust gas that has not entered the supercharging device 5, such as filtering, purification and cooling. These steps can use technologies including filters, catalysts and coolers to ensure that the exhaust gas discharged to the external environment through the air outlet 1002 meets environmental protection standards. Effectively treating the exhaust gas through the exhaust gas treatment device 10 not only protects the environment and human health, but also helps to improve the efficiency and performance of the exhaust gas circulation system of the engine, and achieves cleaner and more efficient emissions.

[0057] Among them, when the supercharging device 5 includes a supercharger turbine 505 and a supercharger compressor 506, in order to ensure that the exhaust gas discharged from the exhaust manifold 4 has a larger driving force, the supercharger turbine 505 can be arranged between the exhaust gas treatment device 10 and the exhaust manifold 4, so that the exhaust gas drives the supercharger turbine 505 and is then treated by the exhaust gas treatment device 10 and discharged into the external environment.

[0058] Based on the same inventive concept, an embodiment of the present invention further provides a vehicle, the vehicle comprising an engine and the exhaust gas circulation system of the engine of the above embodiment.

[0059] Therefore, the vehicle provided in this embodiment has the structure and operation of the exhaust gas circulation system of the engine of the above embodiment, and can achieve the effect of the exhaust gas circulation system of the engine of the above embodiment. The similarities can be referred to the above description and will not be repeated here.

[0060] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present invention can be achieved, and this document does not limit this.

[0061] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An exhaust gas circulation system of an engine, characterized in that: The engine comprises a combustion chamber and an intake manifold and an exhaust manifold connected to the combustion chamber, and the exhaust gas circulation system of the engine in the vehicle comprises: a supercharging device, an intercooling device and a water control device; The first air inlet of the supercharging device is communicated with the exhaust manifold, the second air inlet of the supercharging device is communicated with the external environment, and the air outlet of the supercharging device is communicated with the air inlet of the intercooling device; the supercharging device is used to mix the exhaust gas discharged from the exhaust manifold with the air of the external environment and compress the mixed gas, and then output the compressed gas; The air outlet of the intercooler is connected to the air inlet of the water control device; the intercooler is used to cool the compressed gas and output the cooled compressed gas; The jet port and the spray port of the water control device are both connected to the intake manifold; the water control device is used to separate the supersaturated water in the cooled compressed gas, and discharge the cooled compressed gas with the supersaturated water separated from it to the intake manifold through the jet port, and atomize the supersaturated water and release it to the intake manifold through the spray port in a set spray amount.

2. The exhaust gas circulation system of the engine according to claim 1, characterized in that: Also includes: Circulation control device; The circulation control device is disposed between the exhaust manifold and the first air inlet of the supercharging device, and is used to control the amount of exhaust gas discharged from the exhaust manifold that enters the supercharging device.

3. The exhaust gas circulation system of the engine according to claim 2, characterized in that: The circulation control device includes an exhaust gas circulation control valve.

4. The exhaust gas circulation system of the engine according to claim 2, characterized in that: Also includes: a first cooling device; The first cooling device is arranged between the circulation control device and the exhaust manifold, and the air inlet of the first cooling device is connected to the exhaust manifold, and the air outlet of the first cooling device is connected to the first air inlet of the supercharging device; the first cooling device is used to cool the exhaust gas discharged from the exhaust manifold.

5. The exhaust gas circulation system of the engine according to claim 4, characterized in that: The supercharging device comprises a supercharger; the supercharger comprises a supercharger turbine and a supercharger compressor connected to each other; The supercharger turbine is arranged between the first cooling device and the exhaust manifold; the supercharger compressor is used for mixing the exhaust gas and the air, and compressing the mixed gas and then outputting the compressed gas.

6. The exhaust gas circulation system of the engine according to claim 1, characterized in that: The water control device includes a water separation mechanism, a water storage mechanism and a water release mechanism; The air inlet of the water separation mechanism is communicated with the air outlet of the intercooler, the jet port of the water separation mechanism is communicated with the intake manifold, and the water outlet of the water separation mechanism is communicated with the water inlet of the water storage mechanism; the water separation mechanism is used to separate the supersaturated water in the cooled compressed gas, provide the supersaturated water to the water storage mechanism, and discharge the cooled compressed gas from which the supersaturated water is separated through the jet port to the intake manifold; The water storage mechanism is used to store the supersaturated water; The water inlet of the water release mechanism is connected to the water storage mechanism, and the spray port of the water release mechanism is connected to the intake manifold; the water release mechanism is used to atomize the supersaturated water stored in the water storage mechanism and release it to the intake manifold in the set atomization amount.

7. The exhaust gas circulation system of the engine according to claim 6, characterized in that: The water separation mechanism includes at least one of a water-gas separation network and a water-gas separation pipeline.

8. The exhaust gas circulation system of the engine according to claim 6, characterized in that: The water release mechanism includes a vaporizer.

9. The exhaust gas circulation system of an engine according to claim 1, characterized in that: Also includes: Exhaust gas treatment equipment; The air inlet of the exhaust gas treatment device is connected to the exhaust manifold, and the air outlet of the exhaust gas treatment device is connected to the external environment; the exhaust gas treatment device is used to treat the exhaust gas that has not entered the supercharging device and discharge it into the external environment.

10. A vehicle, characterized in that: include: An engine and an exhaust gas circulation system of the engine as claimed in any one of claims 1 to 9.

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