Cooling system and vehicle

Abstract

The utility model relates to a cooling system and a vehicle, the cooling system comprises a water pump, a radiator, an EGR cooler, a first heating part cooling flow channel and a second heating part cooling flow channel, the first heating part cooling flow channel is connected in series with a liquid channel of the EGR cooler to form a first cooling branch; the first heating component cooling flow channel forms a first cooling branch, the second heating component cooling flow channel forms a second cooling branch, an outlet of the water pump is connected with an inlet of the first cooling branch and an inlet of the second cooling branch, and an outlet of the first cooling branch and an outlet of the second cooling branch are connected to an inlet of the radiator. And an outlet of the radiator is connected with an inlet of the water pump. According to the cooling system, in-cylinder combustion is improved, and the heat efficiency of the engine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle thermal management, and in particular relates to a cooling system and a vehicle. Background Art

[0002] EGR (Exhaust Gas Re-circulation) refers to sending part of the exhaust gas (EGR gas) discharged from the engine back to the intake manifold and re-entering the cylinder together with the fresh mixture.

[0003] In existing technology, the thermal management architecture of vehicles equipped with engine air intercoolers can be divided into the air conditioning refrigeration circuit, the low-temperature cooling system, the air intercooler cooling system, and the engine high-temperature cooling system, based on the cooling medium temperature from low to high. The air intercooler cooling system is a separate cooling circuit, and the EGR cooler is connected in series with the engine high-temperature cooling system.

[0004] However, in the existing technology, since the EGR gas is cooled by the engine's high-temperature cooling system, the temperature of the cooled EGR is relatively high (about 90°C), while the intake temperature of fresh air is usually below 40°C. After the high-temperature EGR and fresh air are mixed, the temperature of the mixture entering the engine cylinder will increase, which is not conducive to improving the compression ratio and knock control, is not conducive to engine combustion, and affects the improvement of the engine's thermal efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a cooling system and a vehicle to improve the thermal efficiency of the engine.

[0006] In order to solve the above problems, on the one hand, an embodiment of the present invention provides a cooling system, including a water pump, a radiator, an EGR cooler, a first heat-generating component cooling flow channel, and a second heat-generating component cooling flow channel, wherein the first heat-generating component cooling flow channel and the liquid channel of the EGR cooler are connected in series to form a first cooling branch, and the second heat-generating component cooling flow channel forms a second cooling branch. The outlet of the water pump is connected to the inlet of the first cooling branch and the inlet of the second cooling branch, respectively. The outlet of the first cooling branch and the outlet of the second cooling branch are connected to the inlet of the radiator, and the outlet of the radiator is connected to the inlet of the water pump.

[0007] The first heat-generating component cooling channel is used to cool a first heat-generating component of the vehicle; the second heat-generating component cooling channel is used to cool a second heat-generating component of the vehicle;

[0008] The radiator is used to cool the coolant flowing through the radiator.

[0009] According to the cooling system of the embodiment of the present invention, the EGR cooler is arranged in the first cooling branch and is connected in series with the first heat-generating component cooling channel. The EGR cooler is not connected in series with the engine's high-temperature cooling system. The coolant temperature in the liquid channel of the EGR cooler is lower than the coolant temperature in the engine's high-temperature cooling system, and the EGR gas can be cooled to a lower temperature. The lower EGR gas temperature can achieve a higher EGR rate, which can reduce the temperature impact of the EGR gas on the mixture (the mixture of EGR gas and fresh air). The lower mixture temperature has better charging efficiency, which is beneficial to improving combustion in the cylinder, improving the thermal efficiency of the engine, reducing the vehicle's fuel consumption, and reducing nitrogen oxide emissions, which is more environmentally friendly.

[0010] Optionally, in the flow direction of the coolant, the EGR cooler is arranged before the cooling flow channel of the first heat-generating component;

[0011] The outlet of the water pump is connected to the inlet of the liquid passage of the EGR cooler, and the outlet of the liquid passage of the EGR cooler is connected to the inlet of the cooling flow channel of the first heat-generating component.

[0012] Optionally, a control valve is further included, wherein the outlet of the first cooling branch and the outlet of the second cooling branch are connected to the radiator through the control valve;

[0013] The control valve is used to adjust the coolant flow on the first cooling branch and the second cooling branch.

[0014] Optionally, a temperature sensor is further included, which is arranged on at least one of the outlets of the first cooling branch and the second cooling branch, and is used to detect the coolant temperature at at least one of the outlets of the first cooling branch and the second cooling branch.

[0015] Optionally, the control valve has a first liquid inlet, a second liquid inlet, a first liquid outlet, and a liquid passage, the first liquid inlet is connected to the outlet of the first cooling branch, the second liquid inlet is connected to the outlet of the second cooling branch, and the outlet of the liquid passage is connected to the first liquid outlet;

[0016] By adjusting the communication areas between the first liquid inlet and the second liquid inlet and the inlet of the liquid passage, respectively, the coolant flow rates on the first cooling branch and the second cooling branch can be adjusted.

[0017] Optionally, the control valve is an electric valve, comprising a valve body, a valve core, and a motor, the valve core being installed in the valve body, the liquid channel being formed on the valve core, and the first liquid inlet, the second liquid inlet, and the first liquid outlet being provided on the valve body;

[0018] The motor is used to drive the valve core to rotate so as to adjust the communication areas between the first liquid inlet and the second liquid inlet and the inlet of the liquid passage respectively.

[0019] Optionally, the control valve has a first liquid inlet, a second liquid inlet, a first liquid outlet, a second liquid outlet, and a liquid passage, the first liquid inlet is connected to the outlet of the first cooling branch, the second liquid inlet is connected to the outlet of the second cooling branch, and the second liquid outlet is connected to the inlet of the water pump via a bypass line;

[0020] By adjusting the communication areas between the first liquid inlet and the second liquid inlet and the inlet of the liquid passage, and adjusting the communication areas between the first liquid outlet and the second liquid outlet and the outlet of the liquid passage, the coolant flow rate on the first cooling branch, the coolant flow rate on the second cooling branch, and the coolant flow rate on the bypass line can be adjusted.

[0021] Optionally, the control valve is an electric valve, comprising a valve body, a valve core, and a motor, the valve core being mounted in the valve body, the liquid channel being formed on the valve core, and the first liquid inlet, the second liquid inlet, the first liquid outlet, and the second liquid outlet being provided on the valve body;

[0022] The motor is used to drive the valve core to rotate to adjust the communication area between the first liquid inlet and the second liquid inlet and the inlet of the liquid passage, and to adjust the communication area between the first liquid outlet and the second liquid outlet and the outlet of the liquid passage.

[0023] Optionally, a water tank is further included, wherein a water outlet of the water tank is connected to a pipeline connecting the radiator and the water pump, and the water tank is used to provide coolant to the water pump.

[0024] Optionally, the first heat-generating component cooling channel is selected from one of an electromechanical coupling system cooling channel, an integrated power system cooling channel, and an integrated motor controller cooling channel, and the second heat-generating component cooling channel is selected from the other two of the electromechanical coupling system cooling channel, the integrated power system cooling channel, and the integrated motor controller cooling channel;

[0025] The electromechanical coupling system cooling channel is provided in the electromechanical coupling system of the vehicle and is used to cool the electromechanical coupling system;

[0026] The integrated power system cooling channel is provided in the integrated power system of the vehicle and is used to cool the integrated power system;

[0027] The integrated motor controller cooling channel is provided in the integrated motor controller of the vehicle and is used for cooling the integrated motor controller.

[0028] Optionally, the first heat-generating component cooling channel is selected from two of an electromechanical coupling system cooling channel, an integrated power system cooling channel, and an integrated motor controller cooling channel, and the second heat-generating component cooling channel is selected from another of the electromechanical coupling system cooling channel, the integrated power system cooling channel, and the integrated motor controller cooling channel;

[0029] The electromechanical coupling system cooling channel is provided in the electromechanical coupling system of the vehicle and is used to cool the electromechanical coupling system;

[0030] The integrated power system cooling channel is provided in the integrated power system of the vehicle and is used to cool the integrated power system;

[0031] The integrated motor controller cooling channel is provided in the integrated motor controller of the vehicle and is used for cooling the integrated motor controller.

[0032] Optionally, the electromechanical coupling system cooling channel includes a generator cooling channel, a drive motor cooling channel and a hydraulic module cooling channel;

[0033] The generator cooling channel is provided in the housing and the rotor core shaft of the generator of the electromechanical coupling system for cooling the generator;

[0034] The drive motor cooling channel is provided in the housing and the rotor core shaft of the drive motor of the electromechanical coupling system and is used to cool the drive motor;

[0035] The hydraulic module cooling channel is provided in the hydraulic module of the electromechanical coupling system and is used to cool the hydraulic module.

[0036] On the other hand, an embodiment of the present invention provides a vehicle, comprising the above-mentioned cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a block diagram of a cooling system provided by a first embodiment of the present invention;

[0038] Figure 2 is a block diagram of a cooling system provided by a second embodiment of the present invention;

[0039] Figure 3 is a block diagram of a cooling system provided by a third embodiment of the present invention;

[0040] Figure 4 is a block diagram of a cooling system provided by a fourth embodiment of the present invention;

[0041] Figure 5 is a block diagram of a cooling system provided by a fifth embodiment of the present invention;

[0042] Figure 6 is a block diagram of a cooling system provided by a sixth embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 10. First cooling branch; 20. Second cooling branch;

[0045] 1. Water pump; 2. Radiator; 3. EGR cooler; 4. First heat-generating component cooling channel; 41a. Electromechanical coupling system cooling channel; 41b. Integrated motor controller cooling channel; 5. Second heat-generating component cooling channel; 51. Integrated power system cooling channel; 52. Integrated motor controller cooling channel; 53. Electromechanical coupling system cooling channel; 6. Control valve; 61. First liquid inlet; 62. Second liquid inlet; 63. First liquid outlet; 64. Second liquid outlet; 7. Bypass line; 8. Water tank. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] First embodiment

[0048] like Figure 1 As shown, the first embodiment of the present invention provides a cooling system, including a water pump 1, a radiator 2, an EGR cooler 3, a first heat-generating component cooling channel 4 and a second heat-generating component cooling channel 5, the first heat-generating component cooling channel 4 and the liquid channel of the EGR cooler 3 are connected in series to form a first cooling branch 10, the second heat-generating component cooling channel 5 forms a second cooling branch 20, the outlet of the water pump 1 is respectively connected to the inlet of the first cooling branch 10 and the inlet of the second cooling branch 20, the outlet of the first cooling branch 10 and the outlet of the second cooling branch 20 are connected to the inlet of the radiator 2, and the outlet of the radiator 2 is connected to the inlet of the water pump 1; the first heat-generating component cooling channel 4 is used to cool the first heat-generating component of the vehicle; the second heat-generating component cooling channel 5 is used to cool the second heat-generating component of the vehicle; the radiator 2 is used to cool the coolant flowing through the radiator 2.

[0049] According to the cooling system of the first embodiment of the present invention, the EGR cooler 3 is arranged in the first cooling branch 10 and is connected in series with the first heat-generating component cooling channel 4. The EGR cooler 3 is not connected in series with the engine high-temperature cooling system. The coolant temperature in the liquid channel of the EGR cooler 3 is lower than the coolant temperature in the engine high-temperature cooling system, and the EGR gas can be cooled to a lower temperature. The lower EGR gas temperature can achieve a higher EGR rate, which can reduce the temperature impact of the EGR gas on the mixture (the mixture of EGR gas and fresh air). The lower mixture temperature has better charging efficiency, which is beneficial to improving combustion in the cylinder, improving the thermal efficiency of the engine, reducing the fuel consumption of the vehicle, and reducing nitrogen oxide emissions, which is more environmentally friendly.

[0050] In this embodiment, the first heat-generating component is the vehicle's electromechanical coupling system (GMC), and the second heat-generating component includes an integrated power system (IPS) and an integrated motor controller system (IPU). The first heat-generating component cooling channel 4 is the GMC cooling channel, while the second heat-generating component cooling channel 5 includes an IPS cooling channel 51 and an IPU cooling channel 52.

[0051] The electromechanical coupling system cooling channel is arranged in the electromechanical coupling system of the vehicle and is used to cool the electromechanical coupling system; the integrated power system cooling channel is arranged in the integrated power system of the vehicle and is used to cool the integrated power system; the integrated motor controller cooling channel is arranged in the integrated motor controller of the vehicle and is used to cool the integrated motor controller.

[0052] In the flow direction of the coolant, the EGR cooler 3 is arranged before the first heat-generating component cooling channel 4, the outlet of the water pump 1 is connected to the inlet of the liquid channel of the EGR cooler 3, and the outlet of the liquid channel of the EGR cooler 3 is connected to the inlet of the first heat-generating component cooling channel 4. After the coolant is cooled by the radiator 2, the coolant flowing out of the water pump 1 first passes through the EGR cooler 3, and the degree of cooling of the EGR gas is further deepened, which effectively improves the EGR rate and enhances the thermal efficiency of the engine. In addition, when the engine is cold-started, after the EGR valve is opened, the coolant in the first cooling branch is heated by the engine's EGR gas, thereby heating the electromechanical coupling system and improving the working efficiency of the electromechanical coupling system.

[0053] However, in other embodiments, according to different arrangements of the integrated power system and the integrated motor controller, the integrated power system cooling channel 51 may also be arranged behind the integrated motor controller cooling channel 52 in the flow direction of the coolant.

[0054] The radiator 2 further includes a control valve 6, through which the outlets of the first cooling branch 10 and the second cooling branch 20 are connected to the radiator 2. The control valve 6 is used to adjust the coolant flow in the first cooling branch 10 and the second cooling branch 20. The coolant flow in the first cooling branch 10 and the second cooling branch 20 is distributed according to the cooling requirements of the first cooling branch 10 and the second cooling branch 20.

[0055] It also includes a temperature sensor, which is arranged on at least one of the outlets of the first cooling branch 10 and the second cooling branch 20, and is used to detect the coolant temperature at at least one of the outlets of the first cooling branch 10 and the second cooling branch 20.

[0056] The control valve 6 has a first liquid inlet 61, a second liquid inlet 62, a first liquid outlet 63, a second liquid outlet 64 and a liquid passage. The first liquid inlet 61 is connected to the outlet of the first cooling branch 10, the second liquid inlet 62 is connected to the outlet of the second cooling branch 20, and the second liquid outlet 64 is connected to the inlet of the water pump 1 through a bypass line 7.

[0057] By adjusting the connection areas between the first liquid inlet 61 and the second liquid inlet 62 and the inlet of the liquid passage, and adjusting the connection areas between the first liquid outlet 63 and the second liquid outlet 64 and the outlet of the liquid passage, the coolant flow rate on the first cooling branch 10, the coolant flow rate on the second cooling branch 20 and the coolant flow rate on the bypass line 7 can be adjusted.

[0058] The larger the communication area (overlapping area) between the first liquid inlet 61 and the inlet of the liquid passage, the greater the coolant flow rate in the first cooling branch 10. When the communication area between the first liquid inlet 61 and the inlet of the liquid passage is zero, the coolant flow rate in the first cooling branch 10 is zero. When the communication area between the first liquid inlet 61 and the inlet of the liquid passage is maximum, the coolant flow rate in the first cooling branch 10 is maximum.

[0059] The larger the communication area (overlapping area) between the second liquid inlet 62 and the inlet of the liquid passage, the greater the coolant flow rate in the second cooling branch 20. When the communication area between the second liquid inlet 62 and the inlet of the liquid passage is zero, the coolant flow rate in the first cooling branch 10 is zero. When the communication area between the second liquid inlet 62 and the inlet of the liquid passage is maximum, the coolant flow rate in the second cooling branch 20 is maximum.

[0060] The larger the communication area (overlapping area) between the first liquid outlet 63 and the outlet of the liquid passage, the greater the coolant flow rate of the radiator 2. When the communication area between the first liquid outlet 63 and the outlet of the liquid passage is zero, the coolant flow rate of the radiator 2 is zero. When the communication area between the first liquid outlet 63 and the outlet of the liquid passage is maximum, the coolant flow rate of the radiator 2 is maximum.

[0061] The larger the communication area (overlapping area) between the second liquid outlet 64 and the outlet of the liquid passage, the greater the coolant flow rate of the bypass line 7. When the communication area between the second liquid outlet 64 and the outlet of the liquid passage is zero, the coolant flow rate of the bypass line 7 is zero. When the communication area between the second liquid outlet 64 and the outlet of the liquid passage is maximum, the coolant flow rate of the bypass line 7 is maximum.

[0062] When the coolant flow of the radiator 2 is at its maximum, the coolant flow of the bypass line 7 is 0. At this time, the cooling requirement is high, the radiator 2 dissipates heat for all the coolant, and the cooling system performs a large circulation.

[0063] The coolant flow of the radiator 2 is 0, and the coolant flow of the bypass line 7 is the largest. At this time, the cooling demand is small, the radiator 2 does not work, and the cooling system performs a small cycle.

[0064] Preferably, the control valve 6 is an electric valve, which includes a valve body, a valve core and a motor. The valve core is installed in the valve body, the liquid channel is formed on the valve core, and the first liquid inlet 61, the second liquid inlet 62, the first liquid outlet 63 and the second liquid outlet 64 are arranged on the valve body.

[0065] The motor is used to drive the valve core to rotate to adjust the communication area between the first liquid inlet 61 and the second liquid inlet 62 and the inlet of the liquid passage, and to adjust the communication area between the first liquid outlet 63 and the second liquid outlet 64 and the outlet of the liquid passage.

[0066] The electric valve can be a ball valve, that is, the valve core is a sphere. The water pump 1 can be an electronic water pump.

[0067] According to the temperature of the cooling system, the operating point of the water pump 1 and the valve core position of the control valve 6 are adjusted, thereby adjusting the coolant flow on the first cooling branch 10, the coolant flow on the second cooling branch 20 and the coolant flow on the bypass line 7, thereby stabilizing the temperature of the entire cooling system, and then stabilizing the temperature of the EGR gas, stabilizing the engine's intake temperature, and optimizing engine combustion.

[0068] Through the water pump 1 and the control valve 6, the cooling system can perform closed-loop control of the entire cooling system according to the real-time temperature, thereby improving the temperature management of the cooling system.

[0069] Of course, in other embodiments, the control valve 6 may also be a pneumatic valve, that is, a pneumatic actuator is used instead of a motor.

[0070] EGR cooler 3 has a liquid channel and a gas channel. Coolant flows through the liquid channel, exchanging heat with the high-temperature EGR gas in the gas channel. The high-temperature EGR gas then exchanges heat with the low-temperature coolant, cooling the high-temperature EGR gas and heating the coolant. The heated coolant is then cooled by radiator 2 and flows back to water pump 1.

[0071] The system also includes a water tank 8, the outlet of which is connected to the pipeline connecting the radiator 2 and the water pump 1. The water tank 8 is used to supply coolant to the water pump 1. The water tank 8 replenishes the water pump 1 during operation to prevent cavitation and improve the reliability of the water pump 1. In addition, the water tank 8 also provides an overflow port for the entire cooling system.

[0072] The radiator 2 can be air-cooled or liquid-cooled.

[0073] In other embodiments, the control valve 6 may also be an electromagnetic proportional control valve. The electromagnetic proportional control valve can adjust the coolant flow rate in the first cooling branch 10, the coolant flow rate in the second cooling branch 20, and the coolant flow rate in the bypass line 7. In other words, the coolant flow rate in the first cooling branch 10, the second cooling branch 20, and the bypass line 7 is distributed by the electromagnetic proportional valve.

[0074] Second embodiment

[0075] Figure 2 The second embodiment of the cooling system of the present invention is shown. The difference between the second embodiment and the first embodiment is that the bypass line 7 is removed. The specific differences are:

[0076] The control valve 6 has a first liquid inlet 61, a second liquid inlet 62, a first liquid outlet 63 and a liquid passage. The first liquid inlet 61 is connected to the outlet of the first cooling branch 10, the second liquid inlet 62 is connected to the outlet of the second cooling branch 20, and the outlet of the liquid passage is connected to the first liquid outlet 63; by adjusting the connection area between the first liquid inlet 61 and the second liquid inlet 62 and the inlet of the liquid passage respectively, the coolant flow on the first cooling branch 10 and the second cooling branch 20 can be adjusted.

[0077] The control valve is an electric valve, which includes a valve body, a valve core and a motor. The valve core is installed in the valve body, the liquid channel is formed on the valve core, and the first liquid inlet 61, the second liquid inlet 62 and the first liquid outlet 63 are arranged on the valve body; the motor is used to drive the valve core to rotate to adjust the connection area between the first liquid inlet 61 and the second liquid inlet 62 and the entrance of the liquid passage respectively.

[0078] That is, in the second embodiment, since the bypass line 7 is not provided, the second liquid outlet 64 does not need to be provided.

[0079] In this embodiment, the coolant in the first cooling branch 10 and the second cooling branch 20 must be cooled by the radiator 2 at any time. Compared with the first embodiment, the energy consumption may increase, but the structure is simpler.

[0080] Third embodiment

[0081] Figure 3 The third embodiment of the cooling system is shown. It differs from the first embodiment in that the first heat-generating component is an integrated power system (IPS), and the second heat-generating component includes a electromechanical coupling system (GMC) and an integrated motor controller system (IPU). The first heat-generating component cooling channel 4 is the IPU cooling channel, while the second heat-generating component cooling channel 5 includes an GMC cooling channel 53 and an IPU cooling channel 52.

[0082] Fourth embodiment

[0083] Figure 4 The fourth embodiment of the cooling system of the present invention is shown. It differs from the first embodiment in that the first heat-generating component is an integrated motor controller (IPU), and the second heat-generating component includes a electromechanical coupling system (GMC) and an integrated power supply system (IPS). The first heat-generating component cooling channel 4 is the IPU cooling channel, while the second heat-generating component cooling channel 5 includes an GMC cooling channel 53 and an IPS cooling channel 51.

[0084] Fifth embodiment

[0085] Figure 5 The fifth embodiment of the cooling system of the present invention is shown. It differs from the first embodiment in that the first heat-generating component includes a electromechanical coupling system (GMC) and an integrated motor controller system (IPU), while the second heat-generating component is an integrated power supply system (IPS). The first heat-generating component cooling channels 4 include electromechanical coupling system cooling channels 41a and integrated motor controller cooling channels 41b, while the second heat-generating component cooling channels 5 are integrated power supply system cooling channels 51.

[0086] The integrated motor controller cooling channel 41 b is connected between the electromechanical coupling system cooling channel 41 a and the EGR cooler 3 .

[0087] Sixth embodiment

[0088] Figure 6 The sixth embodiment of the cooling system of the present invention is shown. It differs from the first embodiment in that the first heat-generating component includes a electromechanical coupling system (GMC) and an integrated power system (IPS), while the second heat-generating component is an integrated motor controller system (IPU). The first heat-generating component cooling channels 4 include electromechanical coupling system cooling channels 41a and integrated power system cooling channels 41c, while the second heat-generating component cooling channels 5 are integrated motor controller cooling channels 52.

[0089] The integrated power system cooling channel 41 c is connected between the electromechanical coupling system cooling channel 41 a and the EGR cooler 3 .

[0090] In addition, an embodiment of the present invention provides a vehicle, comprising the cooling system of the above embodiment.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cooling system, characterized in that: The system comprises a water pump, a radiator, an EGR cooler, a first heat-generating component cooling channel, and a second heat-generating component cooling channel. The first heat-generating component cooling channel and the liquid channel of the EGR cooler are connected in series to form a first cooling branch. The second heat-generating component cooling channel forms a second cooling branch. The outlet of the water pump is connected to the inlet of the first cooling branch and the inlet of the second cooling branch, respectively. The outlet of the first cooling branch and the outlet of the second cooling branch are connected to the inlet of the radiator. The outlet of the radiator is connected to the inlet of the water pump. The first heat-generating component cooling channel is used to cool a first heat-generating component of the vehicle; the second heat-generating component cooling channel is used to cool a second heat-generating component of the vehicle; The radiator is used to cool the coolant flowing through the radiator.

2. The cooling system according to claim 1, characterized in that In the flow direction of the coolant, the EGR cooler is arranged before the cooling flow channel of the first heat-generating component; The outlet of the water pump is connected to the inlet of the liquid passage of the EGR cooler, and the outlet of the liquid passage of the EGR cooler is connected to the inlet of the cooling flow channel of the first heat-generating component.

3. The cooling system according to claim 1, characterized in that Also comprising a control valve, wherein the outlet of the first cooling branch and the outlet of the second cooling branch are connected to the radiator through the control valve; The control valve is used to adjust the coolant flow on the first cooling branch and the second cooling branch.

4. The cooling system according to claim 3, characterized in that It also includes a temperature sensor, which is arranged on at least one of the outlets of the first cooling branch and the second cooling branch, and is used to detect the coolant temperature at at least one of the outlets of the first cooling branch and the second cooling branch.

5. The cooling system according to claim 4, characterized in that The control valve has a first liquid inlet, a second liquid inlet, a first liquid outlet, and a liquid passage, wherein the first liquid inlet is connected to the outlet of the first cooling branch, the second liquid inlet is connected to the outlet of the second cooling branch, and the outlet of the liquid passage is connected to the first liquid outlet; By adjusting the communication areas between the first liquid inlet and the second liquid inlet and the inlet of the liquid passage, respectively, the coolant flow rates on the first cooling branch and the second cooling branch can be adjusted.

6. The cooling system according to claim 5, characterized in that The control valve is an electric valve, which includes a valve body, a valve core and a motor. The valve core is installed in the valve body, the liquid channel is formed on the valve core, and the first liquid inlet, the second liquid inlet and the first liquid outlet are provided on the valve body; The motor is used to drive the valve core to rotate so as to adjust the communication areas between the first liquid inlet and the second liquid inlet and the inlet of the liquid passage respectively.

7. The cooling system according to claim 4, characterized in that The control valve has a first liquid inlet, a second liquid inlet, a first liquid outlet, a second liquid outlet, and a liquid passage, wherein the first liquid inlet is connected to the outlet of the first cooling branch, the second liquid inlet is connected to the outlet of the second cooling branch, and the second liquid outlet is connected to the inlet of the water pump via a bypass line; By adjusting the communication areas between the first liquid inlet and the second liquid inlet and the inlet of the liquid passage, and adjusting the communication areas between the first liquid outlet and the second liquid outlet and the outlet of the liquid passage, the coolant flow rate on the first cooling branch, the coolant flow rate on the second cooling branch, and the coolant flow rate on the bypass line can be adjusted.

8. The cooling system according to claim 7, characterized in that The control valve is an electric valve, which includes a valve body, a valve core and a motor. The valve core is installed in the valve body, the liquid channel is formed on the valve core, and the first liquid inlet, the second liquid inlet, the first liquid outlet and the second liquid outlet are provided on the valve body; The motor is used to drive the valve core to rotate to adjust the communication area between the first liquid inlet and the second liquid inlet and the inlet of the liquid passage, and to adjust the communication area between the first liquid outlet and the second liquid outlet and the outlet of the liquid passage.

9. The cooling system according to claim 1, wherein: It also includes a water tank, a water outlet of which is connected to a pipeline connecting the radiator and the water pump, and the water tank is used to provide coolant to the water pump.

10. The cooling system according to claim 1, wherein: The first heat-generating component cooling channel is selected from one of an electromechanical coupling system cooling channel, an integrated power system cooling channel, and an integrated motor controller cooling channel; the second heat-generating component cooling channel is selected from the other two of the electromechanical coupling system cooling channel, the integrated power system cooling channel, and the integrated motor controller cooling channel; The electromechanical coupling system cooling channel is provided in the electromechanical coupling system of the vehicle and is used to cool the electromechanical coupling system; The integrated power system cooling channel is provided in the integrated power system of the vehicle and is used to cool the integrated power system; The integrated motor controller cooling channel is provided in the integrated motor controller of the vehicle and is used for cooling the integrated motor controller.

11. The cooling system according to claim 1, wherein: The first heat-generating component cooling channel is selected from two of the electromechanical coupling system cooling channel, the integrated power system cooling channel, and the integrated motor controller cooling channel; the second heat-generating component cooling channel is selected from the other of the electromechanical coupling system cooling channel, the integrated power system cooling channel, and the integrated motor controller cooling channel; The electromechanical coupling system cooling channel is provided in the electromechanical coupling system of the vehicle and is used to cool the electromechanical coupling system; The integrated power system cooling channel is provided in the integrated power system of the vehicle and is used to cool the integrated power system; The integrated motor controller cooling channel is provided in the integrated motor controller of the vehicle and is used for cooling the integrated motor controller.

12. The cooling system according to claim 10 or 11, characterized in that: The electromechanical coupling system cooling channels include generator cooling channels, drive motor cooling channels and hydraulic module cooling channels; The generator cooling channel is provided in the housing and the rotor core shaft of the generator of the electromechanical coupling system for cooling the generator; The drive motor cooling channel is provided in the housing and the rotor core shaft of the drive motor of the electromechanical coupling system and is used to cool the drive motor; The hydraulic module cooling channel is provided in the hydraulic module of the electromechanical coupling system and is used to cool the hydraulic module.

13. A vehicle, characterized in that: A cooling system comprising the cooling system according to any one of claims 1 to 12.

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