Air intake and exhaust system of engine and control method of air intake and exhaust system

Abstract

The invention discloses an intake and exhaust system of an engine and a control method thereof, and relates to the technical field of vehicles. The intercooler is provided with a first cavity and a second cavity, the first cavity is connected with the intake manifold, and a first heat exchange medium circulates in the second cavity; the first temperature sensor and the humidity sensor are both arranged on the upstream of the intercooler and used for detecting the air inlet temperature and the air inlet humidity of the intercooler respectively, and the controller is constructed to be used for controlling the first driving pump according to feedback information of the first temperature sensor and the humidity sensor; one end of the first pipeline is connected between the intercooler and the intake manifold, and the drain valve is arranged at the other end of the first pipeline. Therefore, the intercooler can be controlled to reduce the cooling capacity according to the feedback information, the amount of liquid water generated in the intercooler can be reduced, and the liquid water can be discharged through the liquid discharging valve, so that the probability that the engine is on fire can be reduced, the combustion stability of the engine can be improved, oil consumption can be reduced, and the service life of the engine is prolonged. And the output torque stability can be improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an intake and exhaust system of an engine and a control method thereof. Background Art

[0002] In the related technology, under certain working conditions, the intercooler will liquefy a large amount of water vapor to form liquid water. The condensed water will be brought into the engine, causing engine misfire. In addition, liquid water brought into the engine will seriously affect the combustion stability of the engine, causing a sharp increase in fuel consumption and causing unstable engine output torque. 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 purpose of the present invention is to provide an intake and exhaust system of an engine, which can reduce the amount of liquid water generated in the intercooler, and the drain valve can discharge the liquid water, thereby reducing the probability of engine misfire, which is beneficial to improving the combustion stability of the engine, reducing fuel consumption, and improving the output torque stability.

[0004] The present invention also provides a control method for the intake and exhaust system of an engine.

[0005] The present invention also provides a vehicle having the intake and exhaust system of the engine.

[0006] According to an embodiment of the present invention, an intake and exhaust system of an engine comprises: an intercooler, an intake manifold, the intercooler having a first cavity and a second cavity separated from each other, the first cavity being connected to the intake manifold, and a first heat exchange medium flowing through the second cavity; a controller, a first temperature sensor, a humidity sensor, and a first drive pump, the first temperature sensor and the humidity sensor being both disposed upstream of the intercooler and respectively used to detect an intake air temperature and an intake air humidity of the intercooler, the controller being electrically connected to the first temperature sensor, the humidity sensor, and the first drive pump, the first drive pump being connected to the second cavity, and the controller being configured to control the first drive pump according to feedback information of the first temperature sensor and the humidity sensor; a first pipeline, and a drain valve, one end of the first pipeline being connected between the intercooler and the intake manifold, the drain valve being disposed at the other end of the first pipeline; a liquid storage container, the drain valve being connected to the liquid storage container, and when the drain valve is opened, liquid water stored in the first pipeline can flow into the liquid storage container.

[0007] According to the intake and exhaust system of the engine of the embodiment of the present invention, the intercooler can be controlled to reduce the cooling capacity according to feedback information, the amount of liquid water generated in the intercooler can be reduced, and the drain valve can discharge the liquid water, thereby reducing the probability of engine misfire, which is beneficial to improving the combustion stability of the engine, reducing fuel consumption, and improving the output torque stability.

[0008] According to some embodiments of the present invention, the intake and exhaust system of the engine also includes: a multi-way valve and a second temperature sensor, the multi-way valve is electrically connected to the controller and includes a first interface, a second interface and a third interface, the first interface, the second cavity, the first drive pump, and the second interface form a first circulation loop, the first interface, the second cavity, the first drive pump, the third interface and the cooling system of the engine or the first liquid supply tank form a second circulation loop, the second temperature sensor is arranged downstream of the intercooler and is used to detect the outlet temperature of the intercooler, the controller is electrically connected to the second temperature sensor, and the controller is constructed to control the multi-way valve according to feedback information from the second temperature sensor.

[0009] According to some embodiments of the present invention, the drain valve is configured as a mechanical automatic valve; or, the intake and exhaust system further includes: a pressure sensor, the drain valve is configured as an electrically controlled valve, the pressure sensor and the drain valve are both electrically connected to the controller, the pressure sensor is disposed at the other end of the first pipeline, the pressure sensor is used to detect the liquid pressure in the first pipeline, and the controller is configured to control the electrically controlled valve according to feedback information from the pressure sensor.

[0010] According to some embodiments of the present invention, the intake and exhaust system of the engine also includes: an exhaust manifold, an EGR cooler, an EGR valve, a second liquid supply tank, and a second drive pump. The second drive pump and the EGR valve are electrically connected to the controller. The EGR cooler has a third cavity and a fourth cavity separated from each other. The exhaust manifold is connected between the intake manifold and the third cavity. The EGR valve is connected between the third cavity and the upstream of the intercooler. The fourth cavity, the second drive pump and the second liquid supply tank form a third circulation loop.

[0011] According to some embodiments of the present invention, the engine is an in-line engine, and the intake and exhaust system further includes: a plurality of cylinders, the intake manifold having an intake end and a plurality of outlet ends, the intake end being connected to the first cavity, the plurality of outlet ends being connected to the plurality of cylinders in a one-to-one correspondence, and the spacing distance between the two middlemost cylinders among the plurality of cylinders and the intake end is smaller than the spacing distance between the remaining cylinders and the intake end.

[0012] According to some embodiments of the present invention, the engine is an in-line engine, and the intake and exhaust system further includes: a plurality of cylinders and a guide pipe, the intake manifold having an intake end and a plurality of outlet ends, the intake end being connected to the first cavity, and the plurality of outlet ends being connected to the plurality of cylinders in a one-to-one correspondence; the guide pipe is arranged in the intake manifold and has a first sub-pipe and a second sub-pipe, the extension direction of the first sub-pipe is different from the extension direction of the second sub-pipe, the second sub-pipe has a relative first end and a second end, the first end is connected to the first sub-pipe, and the second end extends toward the plurality of cylinders, the spacing distance between the two middlemost cylinders among the plurality of cylinders and the second end is smaller than the spacing distance between the remaining cylinders and the second end; the other end of the second sub-pipe has a cross-sectional area that gradually increases from one end of the second sub-pipe connected to the first sub-pipe to the other end of the second sub-pipe.

[0013] According to the control method of the intake and exhaust system of the engine of the present invention, the intake and exhaust system includes: an intercooler, an intake manifold, the intercooler has a first cavity and a second cavity separated, the first cavity is connected to the intake manifold, and a first heat exchange medium flows in the second cavity; a controller, a first temperature sensor, a humidity sensor, and a first drive pump, the first temperature sensor and the humidity sensor are both arranged upstream of the intercooler and are respectively used to detect the intake temperature and intake humidity of the intercooler, the controller is electrically connected to the first temperature sensor, the humidity sensor, and the first drive pump, the first drive pump is connected to the second cavity, and the controller is constructed It is used to control the first drive pump according to the feedback information of the first temperature sensor and the humidity sensor; a first pipeline and a drain valve, one end of the first pipeline is connected between the intercooler and the intake manifold, and the drain valve is arranged at the other end of the first pipeline; a liquid storage container, the drain valve is connected to the liquid storage container, and when the drain valve is opened, the liquid water stored in the first pipeline can flow into the liquid storage container; the control method comprises: obtaining the intake temperature and intake humidity of the intercooler, and obtaining the dew point temperature according to the intake temperature and the intake humidity; if the dew point temperature is greater than a first preset value, controlling the speed of the first drive pump to reduce the preset speed value.

[0014] According to some embodiments of the present invention, the intake and exhaust system also includes: a multi-way valve and a second temperature sensor, the multi-way valve is electrically connected to the controller and includes a first interface, a second interface and a third interface, the first interface, the second cavity, the first drive pump, and the second interface form a first circulation loop, the first interface, the second cavity, the first drive pump, the third interface and the cooling system of the engine or the first liquid supply tank form a second circulation loop, the second temperature sensor is arranged downstream of the intercooler and is used to detect the outlet temperature of the intercooler, the controller is electrically connected to the second temperature sensor, and the controller is constructed to control the multi-way valve according to feedback information from the second temperature sensor; the control method also includes: after controlling the speed of the first drive pump to reduce a preset speed value, obtaining the outlet temperature of the intercooler, if the outlet temperature is less than the dew point temperature, controlling the multi-way valve to make the first circulation loop conductive and the second circulation loop disconnected.

[0015] According to some embodiments of the present invention, the intake and exhaust system also includes: an exhaust manifold, an EGR cooler, an EGR valve, a second liquid supply tank, and a second drive pump, the second drive pump and the EGR valve are both electrically connected to the controller, the EGR cooler has a third cavity and a fourth cavity separated from each other, the exhaust manifold is connected between the intake manifold and the third cavity, and the EGR valve is connected between the third cavity and the upstream of the intercooler; the fourth cavity, the second drive pump and the second liquid supply tank form a third circulation loop; the control method also includes: controlling the multi-way valve to make the first circulation loop conductive and the second circulation loop disconnected, obtaining the outlet temperature of the intercooler, and if the outlet temperature is less than the dew point temperature, controlling the opening of the EGR valve to be below a preset opening value.

[0016] A vehicle according to an embodiment of the present invention includes the above-mentioned intake and exhaust system of the engine.

[0017] 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

[0018] 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:

[0019] Figure 1 is a schematic diagram of the architecture of an intake and exhaust system according to an embodiment of the present invention;

[0020] Figure 2 is a comparison table of dew point temperatures under different temperatures and humidities according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of a flow guide tube according to an embodiment of the present invention;

[0022] Figure 4 is a flow chart of a method for controlling an intake and exhaust system of an engine according to an embodiment of the present invention;

[0023] Figure 5 It is a flowchart of a specific embodiment of a method for controlling an intake and exhaust system of an engine according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] Intercooler 1;

[0026] Intake manifold 2; intake end 21; outlet end 22;

[0027] Humidity sensor 3; drain valve 4; throttle valve 5; compressor 6; exhaust manifold 8; EGR cooler 9; EGR valve 10; three-way catalytic converter 11; mixing valve 12; air filter 13; turbine 14; cylinder 15;

[0028] Flow guide tube 17; first sub-tube 171; second sub-tube 172; first end 1721; second end 1722;

[0029] Intake and exhaust system 100 . DETAILED DESCRIPTION

[0030] 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.

[0031] Reference below Figure 1-Figure 3 An intake and exhaust system 100 of an engine according to an embodiment of the present invention is described.

[0032] like Figure 1As shown, an intake and exhaust system 100 of an engine according to an embodiment of the present invention includes: an intercooler 1, an intake manifold 2, a controller, a first temperature sensor, a humidity sensor 3, a first driving pump, a first pipeline, a drain valve 4 and a liquid storage container. The intercooler 1 has a first cavity and a second cavity separated from each other. The first cavity is connected to the intake manifold 2, and a first heat exchange medium flows in the second cavity. The first temperature sensor and the humidity sensor 3 are both arranged upstream of the intercooler 1 and are respectively used to detect the intake temperature and intake humidity of the intercooler 1. The controller is electrically connected to the first temperature sensor, the humidity sensor 3 and the first driving pump. The first driving pump is connected to the second cavity. The controller is configured to control the first driving pump according to feedback information of the first temperature sensor and the humidity sensor 3. One end of the first pipeline is connected between the intercooler 1 and the intake manifold 2. The drain valve 4 is arranged at the other end of the first pipeline. The drain valve 4 is connected to the liquid storage container. When the drain valve 4 is opened, liquid water stored in the first pipeline can flow into the liquid storage container.

[0033] Among them, Figure 1 As shown, the intake and exhaust system 100 may further include a throttle valve 5 and a compressor 6. The intercooler 1 has a first cavity and a second cavity separated from each other. The compressor 6, the first cavity of the intercooler 1, the throttle valve 5, and the intake manifold 2 are connected in sequence.

[0034] The first heat exchange medium flows through the second cavity, and the first heat exchange medium in the second cavity can be used to cool the gas in the first cavity.

[0035] The first temperature sensor and the humidity sensor 3 are both arranged upstream of the intercooler 1. The first temperature sensor is used to detect the intake air temperature of the intercooler 1. The first temperature sensor can feed back the detected intake air temperature signal of the intercooler 1 to the controller. The humidity sensor 3 is used to detect the intake air humidity of the intercooler 1. The humidity sensor 3 can feed back the detected intake air humidity signal of the intercooler 1 to the controller. The controller can obtain the dew point temperature according to the intake air temperature of the intercooler 1 and the intake air humidity of the intercooler 1.

[0036] As some embodiments of the present application, the controller may be able to adjust the air intake temperature of the intercooler 1 and the air intake humidity of the intercooler 1 according to the intake air temperature of the intercooler 1. Figure 2 Get the dew point temperature from the map shown in the figure. Figure 2 The map shown may be pre-stored in the controller. As some embodiments of the present application, the controller may be able to calculate the dew point temperature according to the intake air temperature of the intercooler 1 and the intake air humidity of the intercooler 1 , and the calculation formula may be pre-stored in the controller.

[0037] And, if the dew point temperature is greater than the first preset value, the speed of the first driving pump is controlled to reduce the preset speed value. Specifically, if the dew point temperature is greater than the first preset value, the controller can reduce the speed of the first driving pump by the preset speed value. Wherein, the preset speed value can be a determined preset value, and the preset speed value can be but not limited to 1000r / min, 1500r / min or 2000r / min, etc. For example, if the speed of the first driving pump is 4000r / min at this time, when the dew point temperature is greater than the first preset value, the controller can control the speed of the first driving pump to reduce by 1000r / min, so that the speed of the first driving pump is reduced to 3000r / min. Alternatively, the preset speed value can be a proportional value, and the preset speed value can be but not limited to 1 / 4, 1 / 3 or 1 / 2, etc. For example, if the speed of the first driving pump is 4000r / min at this time, when the dew point temperature is greater than the first preset value, the controller can control the speed of the first driving pump to reduce by 1 / 4, and the speed of the first driving pump is reduced to 3000r / min. By controlling the rotation speed of the first driving pump to be reduced through the controller, the ability of the first driving pump to pump the first heat exchange medium in the second cavity can be reduced, so that the circulation flow rate of the first heat exchange medium is reduced, and then the ability of the intercooler 1 to cool the gas is reduced, thereby reducing the amount of liquid water (condensed water) generated in the intercooler 1.

[0038] The intercooler 1 and the intake manifold 2 can be connected by a pipeline, one end of the first pipeline is connected to the pipeline between the intercooler 1 and the intake manifold 2, and the drain valve 4 is arranged at the other end of the first pipeline. It can be understood that when the intercooler 1 reduces the temperature of the gas, liquid water (condensed water) may be generated, and the liquid water will flow toward the intake manifold 2 along with the gas. Since one end of the first pipeline is connected to the pipeline between the intercooler 1 and the intake manifold 2, when the liquid water flows to one end of the first pipeline, the liquid water will flow into the first pipeline, thereby reducing the amount of liquid water flowing into the intake manifold 2. The drain valve 4 is connected to the liquid storage container. When the drain valve 4 is opened, the liquid water stored in the first pipeline can flow into the liquid storage container to recycle the liquid water. It should be noted that the setting height of the first pipeline is lower than the setting height of the pipeline between the intercooler 1 and the intake manifold 2, so that the liquid water can flow smoothly into the first pipeline.

[0039] As some embodiments of the present application, the liquid storage container can be configured as a water tank.

[0040] It should be noted that by controlling the rotation speed of the first drive pump to decrease, the ability of the intercooler 1 to cool the gas can be reduced, thereby reducing the amount of liquid water (condensed water) generated in the intercooler 1, and reducing the amount of liquid water entering the intake manifold 2. In addition, the drain valve 4 can discharge the liquid water, thereby further reducing the amount of liquid water entering the intake manifold 2.

[0041] Therefore, the intercooler 1 can be controlled to reduce the cooling capacity according to the feedback information, the amount of liquid water generated in the intercooler 1 can be reduced, and the drain valve 4 can discharge the liquid water, thereby reducing the probability of engine misfire, which is beneficial to improving the combustion stability of the engine, reducing fuel consumption, and improving the output torque stability.

[0042] It can be understood that the intake manifold 2 is connected to the cylinder 15 .

[0043] In some embodiments of the present invention, Figure 1 As shown, the intake and exhaust system 100 of the engine also includes: a multi-way valve and a second temperature sensor, the multi-way valve is electrically connected to the controller and includes a first interface, a second interface and a third interface, the first interface, the second cavity, the first drive pump, and the second interface form a first circulation loop, the first interface, the second cavity, the first drive pump, the third interface and the engine's cooling system or the first liquid supply tank form a second circulation loop, the second temperature sensor is arranged downstream of the intercooler 1 and is used to detect the outlet temperature of the intercooler 1, the controller is electrically connected to the second temperature sensor, and the controller is constructed to control the multi-way valve according to feedback information from the second temperature sensor.

[0044] Among them, the multi-way valve has a first interface, a second interface and a third interface, the multi-way valve is electrically connected to the controller, the controller is electrically connected to the second temperature sensor, the second temperature sensor is arranged downstream of the intercooler 1, and the second temperature sensor can be used to detect the outlet temperature of the intercooler 1. The controller can be used to control the multi-way valve according to the feedback information of the second temperature sensor. The multi-way valve can realize that the first interface is selectively connected with the second interface or the third interface to form different circulation loops. For example, the first interface, the second cavity, the first drive pump, and the second interface can form a first circulation loop, and the first interface, the second cavity, the first drive pump, the third interface and the engine's cooling system or the first liquid supply tank form a second circulation loop. It can be understood that since the first circulation loop does not include the engine's cooling system or the first liquid supply tank compared with the second circulation loop, the cooling capacity of the first circulation loop is lower than that of the second circulation loop.

[0045] It should be noted that, by providing the first liquid supply tank, the circulation loop of the first heat exchange medium can be supplied independently from the cooling system of the engine, thereby increasing the cooling capacity of the intercooler 1 .

[0046] It can be understood that when the multi-way valve controls the first circulation loop to be connected and the second circulation loop to be disconnected, the cooling capacity of the intercooler 1 is low, and when the multi-way valve controls the second circulation loop to be connected and the first circulation loop to be disconnected, the cooling capacity of the intercooler 1 is high.

[0047] The second temperature sensor is used to detect the outlet temperature of the intercooler 1. The second temperature sensor can feed back the outlet temperature of the intercooler 1 to the controller. After the controller controls the speed of the first driving pump to reduce the preset speed value, if the outlet temperature of the intercooler 1 is lower than the dew point temperature, the multi-way valve is controlled to connect the first circulation loop and disconnect the second circulation loop, so as to reduce the cooling capacity of the intercooler 1, thereby further reducing the amount of liquid water generated.

[0048] In some embodiments of the present invention, Figure 1 As shown, the drain valve 4 is constructed as a mechanical automatic valve, or the intake and exhaust system 100 also includes: a pressure sensor, the drain valve 4 is constructed as an electrically controlled valve, the pressure sensor and the drain valve 4 are both electrically connected to the controller, the pressure sensor is arranged at the other end of the first pipeline, the pressure sensor is used to detect the liquid pressure in the first pipeline, and the controller is constructed to control the electrically controlled valve according to the feedback information of the pressure sensor.

[0049] As some embodiments of the present application, the drain valve 4 can be constructed as a mechanical automatic valve, which can be opened or closed according to the gravity of the liquid water. Specifically, when the gravity of the liquid water is greater than the preset weight of the mechanical automatic valve, the mechanical automatic valve opens, and the liquid water stored in the first pipeline flows into the liquid storage container.

[0050] As some embodiments of the present application, a pressure sensor may be provided at the other end of the first pipeline, the pressure sensor may be used to detect the liquid pressure in the first pipeline, the pressure sensor may be electrically connected to the controller, the pressure sensor may transmit the detected pressure signal to the controller, the controller may receive and analyze the pressure signal of the pressure sensor, the controller may compare the liquid pressure in the first pipeline with the preset pressure, the controller may be electrically connected to the drain valve 4, the drain valve 4 may be constructed as an electrically controlled valve, and the controller may be used to control the electrically controlled valve according to the feedback information of the pressure sensor. Specifically, when the liquid pressure in the first pipeline is greater than the preset pressure, the controller may control the drain valve 4 to open so that the liquid water stored in the first pipeline flows into the liquid storage container.

[0051] Such an arrangement can reliably discharge the liquid water stored in the first pipeline into the liquid storage container.

[0052] As some embodiments of the present invention, the liquid storage container may be a water tank of a vehicle, and the liquid water stored in the first pipeline may flow into the water tank of the vehicle for reuse.

[0053] In some embodiments of the present invention, Figure 1As shown, the intake and exhaust system 100 of the engine also includes: an exhaust manifold 8, an EGR cooler 9, an EGR valve 10, a second liquid supply tank, and a second drive pump. The second drive pump and the EGR valve 10 are electrically connected to the controller. The EGR cooler 9 has a third cavity and a fourth cavity separated from each other. The exhaust manifold 8 is connected between the intake manifold 2 and the third cavity. The EGR valve 10 is connected between the third cavity and the upstream of the intercooler 1. The fourth cavity, the second drive pump and the second liquid supply tank form a third circulation loop.

[0054] Among them, the exhaust gas after combustion of the cylinder 15 is discharged into the exhaust manifold 8, the exhaust manifold 8 is connected between the intake manifold 2 and the third cavity of the EGR cooler 9, the EGR valve 10 is connected between the third cavity and the upstream of the intercooler 1, the fourth cavity of the EGR cooler 9, the second drive pump and the second liquid supply tank form a third circulation loop, and the second heat exchange medium flows in the third circulation loop. The second drive pump and the EGR valve 10 are electrically connected to the controller. The EGR valve 10 has a certain opening degree. The larger the opening degree, the greater the flow rate of the exhaust gas passing through the EGR valve 10.

[0055] It is understandable that the EGR cooler 9 will also produce liquid water (condensed water) during use. After controlling the multi-way valve to make the first circulation loop conductive and the second circulation loop disconnected, the outlet temperature of the intercooler 1 can be obtained. If the outlet temperature of the intercooler 1 is still lower than the dew point temperature, the opening of the EGR valve 10 can be controlled to be below the preset opening value to reduce the amount of gas passing through the EGR cooler 9, so as to reduce the amount of liquid water (condensed water) generated in the EGR cooler 9, thereby reducing the amount of liquid water flowing into the intake manifold 2, which is beneficial to improving the combustion stability of the engine, reducing fuel consumption, and improving the output torque stability.

[0056] As some embodiments of the present invention, the intake and exhaust system 100 also includes a three-way catalytic converter 11. A particulate trap may be provided in the three-way catalytic converter 11. The third cavity of the EGR cooler 9 may take air from the middle section of the three-way catalytic converter 11. Such a configuration may reduce the content of harmful substances in the gas introduced into the EGR cooler 9, thereby reducing the emission of harmful substances from the engine.

[0057] As some embodiments of the present invention, the intake and exhaust system 100 also includes an EGR pressure difference sensor and a mixing valve 12. The EGR pressure difference sensor is used to measure the pressure difference before and after the EGR valve 10. If the pressure difference is too small and the actual EGR rate does not reach the target EGR rate, the pressure difference is adjusted by opening the mixing valve 12 to achieve the target EGR rate. The mixing valve 12 can be set upstream of the compressor 6.

[0058] It can be understood that by providing a second liquid supply tank, the second liquid supply tank can provide a second heat exchange medium for the EGR cooler 9, thereby improving the cooling capacity of the EGR cooler 9.

[0059] As some embodiments of the present invention, the air intake and exhaust system 100 further includes an air filter 13 , and the air filter 13 can provide filtered fresh air to the compressor 6 .

[0060] As some embodiments of the present invention, the intake and exhaust system 100 also includes a turbine 14, which is connected between the exhaust manifold 8 and the three-way catalytic converter 11. The exhaust gas discharged from the exhaust manifold 8 can enter the turbine 14. The turbine 14 rotates driven by the exhaust gas, and then can drive the coaxial compressor 6 to rotate.

[0061] In some embodiments of the present invention, Figure 1 As shown, the engine is an in-line engine, and the intake and exhaust system 100 also includes: multiple cylinders 15, the intake manifold 2 has an intake end 21 and multiple outlet ends 22, the intake end 21 is connected to the first cavity, the multiple outlet ends 22 are connected to the multiple cylinders 15 one by one, and the spacing distance between the two middle cylinders 15 and the intake end 21 among the multiple cylinders 15 is smaller than the spacing distance between the remaining cylinders 15 and the intake end 21.

[0062] Among them, the engine can be an in-line engine, the intake end 21 of the intake manifold 2 is connected to the first cavity, and the multiple outlet ends 22 of the intake manifold 2 are connected to the multiple cylinders 15 one by one. The gas cooled by the intercooler 1 can enter the multiple cylinders 15 through the multiple outlet ends 22. The spacing distance between the two middle cylinders 15 among the multiple cylinders 15 and the intake end 21 is smaller than the spacing distance between the remaining cylinders 15 and the intake end 21, so that the position of the intake end 21 is closer to the two middle cylinders 15 among the multiple cylinders 15, so that the flow rate of gas entering each cylinder 15 is more uniform, thereby reducing the risk of a large amount of liquid water entering the same cylinder 15, which is beneficial to reducing the risk of fire.

[0063] In other embodiments of the present invention, Figure 1 and Figure 3As shown, the engine is an in-line engine, and the intake and exhaust system 100 further includes: a plurality of cylinders 15 and a guide pipe 17, the intake manifold 2 has an intake end 21 and a plurality of outlet ends 22, the intake end 21 is connected to the first cavity, and the plurality of outlet ends 22 are connected to the plurality of cylinders 15 in a one-to-one correspondence, the guide pipe 17 is arranged on the intake manifold 2 and has a first sub-pipe 171 and a second sub-pipe 172, the extension direction of the first sub-pipe 171 is different from the extension direction of the second sub-pipe 172, and the second sub-pipe 172 has an opposite first end 1721 and a second end 1722, the first end 1721 is connected to the first sub-tube 171, the second end 1722 extends toward the multiple cylinders 15, the spacing distance between the two middlemost cylinders 15 among the multiple cylinders 15 and the second end 1722 is smaller than the spacing distance between the remaining cylinders 15 and the second end 1722, and the other end of the second sub-tube 172 has a cross-sectional area that gradually increases from one end of the second sub-tube 172 connected to the first sub-tube 171 to the other end of the second sub-tube 172.

[0064] Among them, the engine can be an in-line engine, the intake end 21 of the intake manifold 2 is connected to the first cavity, and the multiple outlet ends 22 of the intake manifold 2 are connected to the multiple cylinders 15 one by one. The gas cooled by the intercooler 1 can enter the multiple cylinders 15 through the multiple outlet ends 22.

[0065] The guide pipe 17 can be arranged in the intake manifold 2, and the guide pipe 17 can have a first sub-pipe 171 and a second sub-pipe 172. The extension direction of the first sub-pipe 171 is different from the extension direction of the second sub-pipe 172. The second sub-pipe 172 can have a first end 1721 and a second end 1722 relative to each other. The first end 1721 of the second sub-pipe 172 can be connected to the first sub-pipe 171, and the second end 1722 of the second sub-pipe 172 can extend toward multiple cylinders 15. The gas can flow into the engine through the first sub-pipe 171 and the second sub-pipe 172 in sequence.

[0066] As some embodiments of the present invention, the flow guide tube 17 may be made of a high temperature and corrosion resistant material (such as but not limited to stainless steel, aluminum oxide, silicon carbide, etc.) to increase the service life of the flow guide tube 17 .

[0067] The spacing distance between the two middlemost cylinders 15 among the multiple cylinders 15 and the second end 1722 can be set to be smaller than the spacing distance between the remaining cylinders 15 and the second end 1722, so that the second end 1722 is positioned closer to the two middlemost cylinders 15 among the multiple cylinders 15, so that the flow rate of gas entering each cylinder 15 is more uniform, thereby reducing the risk of a large amount of liquid water entering the same cylinder 15, which is beneficial to reducing the risk of fire.

[0068] At the same time, the cross-sectional area of ​​the second sub-tube 172 can be gradually increased from one end of the second sub-tube 172 connected to the first sub-tube 171 to the other end of the second sub-tube 172. This arrangement can allow the gas to diffuse in the second sub-tube 172, so that the gas flowing out of the second sub-tube 172 can flow into multiple cylinders 15 more evenly, thereby further reducing the risk of a large amount of liquid water entering the same cylinder 15, which is conducive to further reducing the risk of fire.

[0069] According to the following Figure 4 Describe the control method of the engine's intake and exhaust system.

[0070] The intake and exhaust system of the engine includes: an intercooler, an intake manifold, a controller, a first temperature sensor, a humidity sensor, a first drive pump, a first pipeline, a drain valve and a liquid storage container. The intercooler has a first cavity and a second cavity separated from each other. The first cavity is connected to the intake manifold, and a first heat exchange medium flows in the second cavity. The first temperature sensor and the humidity sensor are both arranged upstream of the intercooler and are respectively used to detect the intake temperature and intake humidity of the intercooler. The controller is electrically connected to the first temperature sensor, the humidity sensor and the first drive pump. The first drive pump is connected to the second cavity. The controller is constructed to control the first drive pump according to feedback information from the first temperature sensor and the humidity sensor. One end of the first pipeline is connected between the intercooler and the intake manifold. The drain valve is arranged at the other end of the first pipeline. The drain valve is connected to the liquid storage container. When the drain valve is opened, liquid water stored in the first pipeline can flow into the liquid storage container.

[0071] The intake and exhaust system may further include a throttle valve and a compressor, the intercooler has a first cavity and a second cavity separated from each other, and the compressor, the first cavity of the intercooler, the throttle valve, and the intake manifold are connected in sequence.

[0072] The first heat exchange medium flows through the second cavity, and the first heat exchange medium in the second cavity can be used to cool the gas in the first cavity.

[0073] The first temperature sensor and the humidity sensor are both arranged upstream of the intercooler. The first temperature sensor is used to detect the intake air temperature of the intercooler. The first temperature sensor can feed back the detected intake air temperature signal of the intercooler to the controller. The humidity sensor is used to detect the intake air humidity of the intercooler. The humidity sensor can feed back the detected intake air humidity signal of the intercooler to the controller.

[0074] like Figure 4 As shown, the control method of the intake and exhaust system of the engine includes the following steps:

[0075] S1, obtaining the intake air temperature and intake air humidity of the intercooler, and obtaining the dew point temperature according to the intake air temperature and intake air humidity. The first temperature sensor is used to detect the intake air temperature of the intercooler, and the first temperature sensor can feed back the detected intake air temperature signal of the intercooler to the controller, and the humidity sensor is used to detect the intake air humidity of the intercooler, and the humidity sensor can feed back the detected intake air humidity signal of the intercooler to the controller, and the controller can obtain the dew point temperature according to the intake air temperature and the intake air humidity of the intercooler.

[0076] As some embodiments of the present application, the controller may be able to adjust the air intake temperature of the intercooler and the air intake humidity of the intercooler according to the air intake temperature of the intercooler and the air intake humidity of the intercooler. Figure 2 Get the dew point temperature from the map shown in the figure. Figure 2 The map shown may be pre-stored in the controller. As some embodiments of the present application, the controller may be able to calculate the dew point temperature according to the intake air temperature of the intercooler and the intake air humidity of the intercooler, and the calculation formula may be pre-stored in the controller.

[0077] S2, if the dew point temperature is greater than the first preset value, the speed of the first driving pump is controlled to be reduced by the preset speed value. Wherein, if the dew point temperature is greater than the first preset value, the controller can reduce the speed of the first driving pump by the preset speed value. Wherein, the preset speed value can be a determined preset value, and the preset speed value can be but not limited to 1000r / min, 1500r / min or 2000r / min, etc. For example, if the speed of the first driving pump is 4000r / min at this time, when the dew point temperature is greater than the first preset value, the controller can control the speed of the first driving pump to be reduced by 1000r / min, so that the speed of the first driving pump is reduced to 3000r / min. Alternatively, the preset speed value can be a proportional value, and the preset speed value can be but not limited to 1 / 4, 1 / 3 or 1 / 2, etc. For example, if the speed of the first driving pump is 4000r / min at this time, when the dew point temperature is greater than the first preset value, the controller can control the speed of the first driving pump to be reduced by 1 / 4, and the speed of the first driving pump is reduced to 3000r / min. By controlling the rotation speed of the first driving pump to be reduced through the controller, the ability of the first driving pump to pump the first heat exchange medium in the second cavity can be reduced, so that the circulation flow rate of the first heat exchange medium is reduced, and then the ability of the intercooler 1 to cool the gas is reduced, thereby reducing the amount of liquid water (condensed water) generated in the intercooler.

[0078] It should be noted that by controlling the rotation speed of the first drive pump to decrease, the ability of the intercooler to cool the gas can be reduced, thereby reducing the amount of liquid water (condensed water) generated in the intercooler and the amount of liquid water entering the intake manifold.

[0079] Therefore, the intercooler can be controlled to reduce the cooling capacity according to the feedback information, which can reduce the amount of liquid water generated in the intercooler, thereby reducing the probability of engine misfire, which is beneficial to improving the combustion stability of the engine, reducing fuel consumption, and improving the output torque stability.

[0080] In some embodiments of the present invention, the intake and exhaust system also includes: a multi-way valve and a second temperature sensor, the multi-way valve is electrically connected to the controller and includes a first interface, a second interface and a third interface, the first interface, the second cavity, the first drive pump, and the second interface form a first circulation loop, the first interface, the second cavity, the first drive pump, the third interface and the engine's cooling system or the first liquid supply tank form a second circulation loop, the second temperature sensor is arranged downstream of the intercooler and is used to detect the outlet temperature of the intercooler, the controller is electrically connected to the second temperature sensor, and the controller is constructed to control the multi-way valve according to feedback information from the second temperature sensor, and the control method also includes: after controlling the speed of the first drive pump to reduce the preset speed value, obtaining the outlet temperature of the intercooler, if the outlet temperature is less than the dew point temperature, controlling the multi-way valve to make the first circulation loop conductive and the second circulation loop disconnected.

[0081] Among them, the multi-way valve has a first interface, a second interface and a third interface, the multi-way valve is electrically connected to the controller, the controller is electrically connected to the second temperature sensor, the second temperature sensor is arranged downstream of the intercooler, the second temperature sensor can be used to detect the outlet temperature of the intercooler, the controller can be used to control the multi-way valve according to the feedback information of the second temperature sensor, the multi-way valve can realize the first interface selectively connected with the second interface or the third interface to form different circulation loops, for example, the first interface, the second cavity, the first drive pump, the second interface can form a first circulation loop, the first interface, the second cavity, the first drive pump, the third interface and the engine's cooling system or the first liquid supply tank form a second circulation loop, it can be understood that since the first circulation loop does not include the engine's cooling system or the first liquid supply tank compared with the second circulation loop, the cooling capacity of the first circulation loop is lower than that of the second circulation loop.

[0082] It should be noted that, by providing the first liquid supply tank, the circulation loop of the first heat exchange medium can be supplied independently from the cooling system of the engine, thereby increasing the cooling capacity of the intercooler.

[0083] It can be understood that when the multi-way valve controls the first circulation loop to be connected and the second circulation loop to be disconnected, the cooling capacity of the intercooler is low, and when the multi-way valve controls the second circulation loop to be connected and the first circulation loop to be disconnected, the cooling capacity of the intercooler is high.

[0084] The control method of the engine's intake and exhaust system also includes: after controlling the speed of the first drive pump to reduce the preset speed value, obtaining the outlet temperature of the intercooler, if the outlet temperature is less than the dew point temperature, controlling the multi-way valve to connect the first circulation loop and disconnect the second circulation loop.

[0085] Specifically, the second temperature sensor is used to detect the outlet temperature of the intercooler. The second temperature sensor can feed back the outlet temperature of the intercooler to the controller. After the controller controls the speed of the first drive pump to reduce the preset speed value, if the outlet temperature of the intercooler is lower than the dew point temperature, the multi-way valve is controlled to connect the first circulation loop and disconnect the second circulation loop to reduce the cooling capacity of the intercooler, thereby further reducing the amount of liquid water generated.

[0086] In some embodiments of the present invention, the intake and exhaust system also includes: an exhaust manifold, an EGR cooler, an EGR valve, a second liquid supply tank, and a second drive pump. The second drive pump and the EGR valve are electrically connected to the controller. The EGR cooler has a third cavity and a fourth cavity separated from each other. The exhaust manifold is connected between the intake manifold and the third cavity. The EGR valve is connected between the third cavity and the upstream of the intercooler. The fourth cavity, the second drive pump and the second liquid supply tank form a third circulation loop.

[0087] Among them, the exhaust gas after cylinder combustion is discharged into the exhaust manifold, the exhaust manifold is connected between the intake manifold and the third cavity of the EGR cooler, the EGR valve is connected between the third cavity and the upstream of the intercooler, the fourth cavity of the EGR cooler, the second drive pump and the second liquid supply tank form a third circulation loop, the second heat exchange medium flows in the third circulation loop, the second drive pump and the EGR valve are electrically connected to the controller, the EGR valve has a certain opening, the larger the opening, the greater the flow of exhaust gas through the EGR valve.

[0088] The control method also includes: controlling the multi-way valve to connect the first circulation loop and disconnect the second circulation loop, obtaining the outlet temperature of the intercooler, and if the outlet temperature is less than the dew point temperature, controlling the EGR valve opening to be below a preset opening value.

[0089] It is understandable that the EGR cooler will also produce liquid water (condensed water) during use. After controlling the multi-way valve to make the first circulation loop conductive and the second circulation loop disconnected, the outlet temperature of the intercooler can be obtained. If the outlet temperature of the intercooler is still lower than the dew point temperature, the opening of the EGR valve can be controlled to be below the preset opening value to reduce the amount of gas passing through the EGR cooler, so as to reduce the amount of liquid water (condensed water) generated in the EGR cooler, thereby reducing the amount of liquid water flowing into the intake manifold, which is beneficial to improving the combustion stability of the engine, reducing fuel consumption, and improving the output torque stability.

[0090] Refer to the following Figure 5A specific embodiment of a method for controlling an intake and exhaust system of an engine according to the present invention is introduced.

[0091] S01, obtaining an intake air temperature and an intake air humidity of an intercooler, and obtaining a dew point temperature according to the intake air temperature and the intake air humidity.

[0092] S02: If the dew point temperature is greater than a first preset value, the rotation speed of the first driving pump is controlled to be reduced by a preset rotation speed value.

[0093] S03, after controlling the speed of the first driving pump to decrease to a preset speed value, obtaining the outlet temperature of the intercooler, if the outlet temperature is lower than the dew point temperature, controlling the multi-way valve to connect the first circulation loop and disconnect the second circulation loop.

[0094] S04, after controlling the multi-way valve to connect the first circulation loop and disconnect the second circulation loop, obtain the outlet temperature of the intercooler. If the outlet temperature is less than the dew point temperature, control the opening of the EGR valve to be less than a preset opening value.

[0095] The vehicle according to the embodiment of the present invention includes the intake and exhaust system 100 of the engine of the above embodiment. The intake and exhaust system 100 can control the intercooler 1 to reduce the cooling capacity according to the feedback information, and can reduce the amount of liquid water generated in the intercooler 1, and the drain valve 4 can discharge the liquid water, thereby reducing the probability of engine misfire, which is beneficial to improving the combustion stability of the engine, reducing fuel consumption, and improving the output torque stability.

[0096] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0097] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0098] In the description of the present invention, "plurality" means two or more.

[0099] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0100] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0101] 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.

[0102] 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 intake and exhaust system (100) of an engine, characterized in that: include: An intercooler (1) and an intake manifold (2), wherein the intercooler (1) comprises a first cavity and a second cavity which are separated from each other, the first cavity is connected to the intake manifold (2), and a first heat exchange medium flows through the second cavity; A controller, a first temperature sensor, a humidity sensor (3), and a first driving pump, wherein the first temperature sensor and the humidity sensor (3) are both arranged upstream of the intercooler (1) and are respectively used to detect the intake air temperature and intake air humidity of the intercooler (1), the controller is electrically connected to the first temperature sensor, the humidity sensor (3), and the first driving pump, the first driving pump is connected to the second cavity, and the controller is configured to control the first driving pump according to feedback information of the first temperature sensor and the humidity sensor (3); A first pipeline and a drain valve (4), wherein one end of the first pipeline is connected between the intercooler (1) and the intake manifold (2), and the drain valve (4) is arranged at the other end of the first pipeline; The liquid storage container is connected to the liquid discharge valve (4), and when the liquid discharge valve (4) is opened, the liquid water stored in the first pipeline can flow into the liquid storage container.

2. The engine intake and exhaust system (100) according to claim 1, characterized in that: Also includes: a multi-way valve and a second temperature sensor, wherein the multi-way valve is electrically connected to the controller and comprises a first interface, a second interface and a third interface, wherein the first interface, the second cavity, the first drive pump and the second interface form a first circulation loop, and the first interface, the second cavity, the first drive pump, the third interface and the cooling system of the engine or the first liquid supply tank form a second circulation loop; The second temperature sensor is arranged downstream of the intercooler (1) and is used to detect the outlet temperature of the intercooler (1). The controller is electrically connected to the second temperature sensor. The controller is configured to control the multi-way valve according to feedback information of the second temperature sensor.

3. The engine intake and exhaust system (100) according to claim 1, characterized in that: The liquid discharge valve (4) is constructed as a mechanical automatic valve; Alternatively, the intake and exhaust system (100) further comprises: a pressure sensor, the drain valve (4) being constructed as an electrically controlled valve, the pressure sensor and the drain valve (4) being electrically connected to the controller, the pressure sensor being arranged at the other end of the first pipeline, the pressure sensor being used to detect the liquid pressure in the first pipeline, and the controller being constructed to control the electrically controlled valve according to feedback information from the pressure sensor.

4. The engine intake and exhaust system (100) according to claim 1, characterized in that: Also includes: An exhaust manifold (8), an EGR cooler (9), an EGR valve (10), a second liquid supply tank, and a second drive pump, wherein the second drive pump and the EGR valve (10) are electrically connected to the controller, the EGR cooler (9) has a third cavity and a fourth cavity separated from each other, the exhaust manifold (8) is connected between the intake manifold (2) and the third cavity, and the EGR valve (10) is connected between the third cavity and the upstream of the intercooler (1); The fourth cavity, the second driving pump and the second liquid supply tank form a third circulation loop.

5. The engine intake and exhaust system (100) according to claim 1, characterized in that: The engine is an in-line engine, and the intake and exhaust system (100) further comprises: a plurality of cylinders (15), the intake manifold (2) having an intake end (21) and a plurality of outlet ends (22), the intake end (21) being connected to the first cavity, and the plurality of outlet ends (22) being connected to the plurality of cylinders (15) in a one-to-one correspondence; The spacing distance between the two middle cylinders (15) among the plurality of cylinders (15) and the air intake end (21) is smaller than the spacing distance between the remaining cylinders (15) and the air intake end (21).

6. The engine intake and exhaust system (100) according to claim 1, characterized in that: The engine is an in-line engine, and the intake and exhaust system (100) further comprises: a plurality of cylinders (15) and a guide pipe (17), the intake manifold (2) having an intake end (21) and a plurality of outlet ends (22), the intake end (21) being connected to the first cavity, and the plurality of outlet ends (22) being connected to the plurality of cylinders (15) in a one-to-one correspondence; The guide pipe (17) is arranged on the intake manifold (2) and comprises a first sub-pipe (171) and a second sub-pipe (172); the extension direction of the first sub-pipe (171) is different from the extension direction of the second sub-pipe (172); the second sub-pipe (172) comprises a first end (1721) and a second end (1722) opposite to each other; the first end (1721) is connected to the first sub-pipe (171); the second end (1722) extends toward the plurality of cylinders (15); the spacing distance between the middle two cylinders (15) among the plurality of cylinders (15) and the second end (1722) is smaller than the spacing distance between the remaining cylinders (15) and the second end (1722); The cross-sectional area of ​​the second sub-tube (172) gradually increases from one end of the second sub-tube (172) where the second sub-tube (172) is connected to the first sub-tube (171) to the other end of the second sub-tube (172).

7. A method for controlling an intake and exhaust system of an engine, characterized in that: The intake and exhaust system comprises: an intercooler and an intake manifold, wherein the intercooler has a first cavity and a second cavity separated from each other, the first cavity is connected to the intake manifold, and a first heat exchange medium flows through the second cavity; A controller, a first temperature sensor, a humidity sensor, and a first driving pump, wherein the first temperature sensor and the humidity sensor are both disposed upstream of the intercooler and are used to detect the intake air temperature and intake air humidity of the intercooler, respectively; the controller is electrically connected to the first temperature sensor, the humidity sensor, and the first driving pump; the first driving pump is connected to the second cavity; and the controller is configured to control the first driving pump according to feedback information from the first temperature sensor and the humidity sensor; A first pipeline and a drain valve, wherein one end of the first pipeline is connected between the intercooler and the intake manifold, and the drain valve is arranged at the other end of the first pipeline; A liquid storage container, the drain valve is connected to the liquid storage container, and when the drain valve is opened, the liquid water stored in the first pipeline can flow into the liquid storage container; The control method comprises: Acquiring an intake air temperature and an intake air humidity of the intercooler, and acquiring a dew point temperature according to the intake air temperature and the intake air humidity; If the dew point temperature is greater than a first preset value, the rotation speed of the first driving pump is controlled to decrease by a preset rotation speed value.

8. The control method of the engine intake and exhaust system according to claim 7, characterized in that: The intake and exhaust system further includes: a multi-way valve and a second temperature sensor, the multi-way valve is electrically connected to the controller and includes a first interface, a second interface and a third interface, the first interface, the second cavity, the first drive pump, and the second interface form a first circulation loop, the first interface, the second cavity, the first drive pump, the third interface and the cooling system of the engine or the first liquid supply tank form a second circulation loop, The second temperature sensor is disposed downstream of the intercooler and is used to detect the outlet temperature of the intercooler. The controller is electrically connected to the second temperature sensor. The controller is configured to control the multi-way valve according to feedback information from the second temperature sensor. The control method further includes: after controlling the speed of the first driving pump to reduce a preset speed value, obtaining the outlet temperature of the intercooler, and if the outlet temperature is less than the dew point temperature, controlling the multi-way valve to connect the first circulation loop and disconnect the second circulation loop.

9. The control method of the engine intake and exhaust system according to claim 8, characterized in that: The intake and exhaust system further includes: an exhaust manifold, an EGR cooler, an EGR valve, a second liquid supply tank, and a second driving pump, wherein the second driving pump and the EGR valve are electrically connected to the controller, the EGR cooler has a third cavity and a fourth cavity separated from each other, the exhaust manifold is connected between the intake manifold and the third cavity, and the EGR valve is connected between the third cavity and the upstream of the intercooler; The fourth cavity, the second driving pump and the second liquid supply tank form a third circulation loop; The control method further includes: after controlling the multi-way valve to connect the first circulation loop and disconnect the second circulation loop, obtaining the outlet temperature of the intercooler, and if the outlet temperature is less than the dew point temperature, controlling the EGR valve opening to be below a preset opening value.

10. A vehicle, characterized in that: An intake and exhaust system (100) comprising an engine according to any one of claims 1-6.

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