A flow control system and flow control method

Abstract

A flow control system and flow control method, applied in the field of vehicle technology, includes: a first oil pump, a main oil pump, a first device to be cooled, a second device to be cooled, and a controller. The inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first device to be cooled to form a first oil supply branch. The second device to be cooled is connected to the outlet end of the main oil pump to form a second oil supply branch. The controller is used to adjust the rotation speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch, so as to control the oil supply of the main oil pump and the flow rate of the first and second devices to be cooled. Since this application selects to supply oil to the devices to be cooled through oil pumps, when the cooling demand of a certain branch increases, adjusting the rotation speed of the corresponding oil pump and the main oil pump can achieve precise control of the oil supply flow rate of each branch and the total branch, thereby reducing the driving power consumption of coolant and saving energy.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a flow control system and flow control method. Background Technology

[0002] Cars are generally equipped with a cooling system, which can cool components such as the engine and clutch to prevent these components from overheating and causing danger.

[0003] like Figure 1 As shown, Figure 1 This is a structural diagram of the current cooling system. A, B, and C are damping orifices, respectively. The coolant flows through the damping orifices to the device that needs to be cooled, thereby achieving the purpose of cooling the device.

[0004] However, the damping orifice cannot adjust the coolant flow rate. For example, when the cooling demand of the device in the branch where C is located increases, the total flow rate through A needs to be increased to meet the cooling demand of C. This will cause the coolant flow rate in both the main branch where A is located and the branch where B is located to increase, thereby increasing the driving power consumption of the coolant and wasting energy. Summary of the Invention

[0005] This application provides a flow control system for controlling the flow rate of coolant, thereby reducing the power consumption of coolant drive and saving energy. This application also provides a flow control method.

[0006] In a first aspect, this application provides a flow control system, comprising:

[0007] The system comprises a first oil pump, a main oil pump, a first cooling device, a second cooling device, and a controller.

[0008] The inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first cooling device to form a first oil supply branch.

[0009] The second cooling device is connected to the outlet end of the main oil pump to form a second oil supply branch;

[0010] The controller is used to adjust the speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch, so as to control the oil supply of the main oil pump and the flow rate into the first cooling device and the second cooling device.

[0011] Optionally, the system further includes: a second oil pump and a third cooling device;

[0012] The inlet end of the second oil pump is connected to the outlet end of the main oil pump, and the outlet end of the second oil pump is connected to the third cooling device to form a third oil supply branch.

[0013] Optionally, the first device to be cooled is a drive motor, the second device to be cooled is a clutch assembly, and the third device to be cooled is a generator;

[0014] The controller is specifically used for:

[0015] According to the oil supply demand of the drive motor, the speed of the first oil pump and the main oil pump are adjusted to control the oil supply of the main oil pump and the flow rate into the drive motor.

[0016] The speed of the main oil pump is adjusted according to the oil supply demand of the clutch assembly, so as to control the oil supply of the main oil pump and the flow rate into the clutch assembly.

[0017] The rotational speeds of the second oil pump and the main oil pump are adjusted according to the generator's oil supply demand in order to control the oil supply of the main oil pump and the flow rate into the generator.

[0018] Optionally, the controller is also used for:

[0019] When the pressure at the inlet of the first oil pump is greater than the pressure at the outlet of the first oil pump, the first oil pump is controlled to generate electricity, and / or when the pressure at the inlet of the second oil pump is greater than the pressure at the outlet of the second oil pump, the second oil pump is controlled to generate electricity.

[0020] The electrical energy generated by the first oil pump and / or the second oil pump is delivered to the main oil pump to reduce the energy consumption of the main oil pump.

[0021] Optionally, the controller is also used for:

[0022] When the first oil pump and / or the second oil pump generates electricity, the charging current corresponding to the oil pump is controlled within a preset current range to prevent the oil pump speed from being too high.

[0023] Secondly, this application provides a flow control method applied to a flow control system, the flow control system comprising: a first oil pump, a main oil pump, a first cooling device, and a second cooling device; the inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first cooling device to form a first oil supply branch; the second cooling device is connected to the outlet end of the main oil pump to form a second oil supply branch; the flow control method includes:

[0024] Based on the oil supply demand of each oil supply branch, the speed of the oil pump in the corresponding oil supply branch is adjusted, and the flow rate into the first and second cooling devices is controlled by the oil supply of the main oil pump.

[0025] Optionally, the flow control system further includes: a second oil pump and a third cooling device; the inlet end of the second oil pump is connected to the outlet end of the main oil pump, and the outlet end of the second oil pump is connected to the third cooling device to form a third oil supply branch; the first cooling device is a drive motor, the second cooling device is a clutch assembly, and the third cooling device is a generator; adjusting the speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch includes:

[0026] Adjust the speed of the first oil pump and the main oil pump according to the oil supply demand of the drive motor;

[0027] The speed of the main oil pump is adjusted according to the oil supply demand of the clutch assembly.

[0028] Adjust the speed of the second oil pump and the main oil pump according to the oil supply demand of the generator.

[0029] Optionally, the method further includes:

[0030] When the pressure at the inlet of the first oil pump is greater than the pressure at the outlet of the first oil pump, the first oil pump is controlled to generate electricity, and / or when the pressure at the inlet of the second oil pump is greater than the pressure at the outlet of the second oil pump, the second oil pump is controlled to generate electricity.

[0031] The electrical energy generated by the first oil pump and / or the second oil pump is delivered to the main oil pump to reduce the energy consumption of the main oil pump.

[0032] Optionally, the method further includes:

[0033] When the first oil pump and / or the second oil pump generates electricity, the charging current corresponding to the oil pump is controlled within a preset current range to prevent the oil pump speed from being too high.

[0034] Thirdly, this application provides a vehicle including a flow control system as described in the first aspect, and controlled based on a flow control method as described in the second aspect.

[0035] Fourthly, embodiments of this application provide a computer storage medium storing code, wherein when the code is executed, a device running the code implements the method described in any of the first aspects above.

[0036] Compared with the prior art, this application has the following beneficial effects:

[0037] The flow control system in this application includes: a first oil pump, a main oil pump, a first device to be cooled, a second device to be cooled, and a controller. The inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first device to be cooled to form a first oil supply branch. The second device to be cooled is connected to the outlet end of the main oil pump to form a second oil supply branch. The controller is used to adjust the speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch, so as to control the oil supply of the main oil pump and the flow of the first and second devices to be cooled. Since this application chooses to supply oil to the devices to be cooled through oil pumps, when the cooling demand of a certain branch increases, adjusting the speed of the corresponding oil pump and the main oil pump can achieve precise control of the oil supply flow of each branch and the total branch, thereby reducing the driving power consumption of the coolant and saving energy. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings used in the description of the embodiment or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A structural diagram of a prior art flow control system provided in the embodiments of this application;

[0040] Figure 2 A structural diagram of a flow control system provided in an embodiment of this application;

[0041] Figure 3 This is a structural diagram of another flow control system provided in an embodiment of this application. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0043] It should be noted that the flow control system and flow control method provided in this application are applicable to the field of vehicle technology. The above are merely examples and do not limit the application field of the methods and devices provided in this application.

[0044] Cars are generally equipped with a cooling system, which can cool components such as the engine and clutch to prevent these components from overheating and causing danger.

[0045] like Figure 1 As shown, Figure 1 This is a structural diagram of the current cooling system. A, B, and C are damping orifices, respectively. The coolant flows through the damping orifices to the device that needs to be cooled, thereby achieving the purpose of cooling the device.

[0046] However, damping control cannot adjust the coolant flow rate. For example, when the cooling demand of the device in the branch where C is located increases, the total flow rate through A needs to be increased to meet the cooling demand of C. The coolant flow rates in both the main branch where A is located and the branch where B is located increase, which leads to an increase in the driving power consumption of the coolant and wastes energy.

[0047] In view of this, this application provides a flow control system, which includes: a first oil pump, a main oil pump, a first device to be cooled, a second device to be cooled, and a controller. The inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first device to be cooled to form a first oil supply branch. The second device to be cooled is connected to the outlet end of the main oil pump to form a second oil supply branch. The controller is used to adjust the speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch, so as to control the oil supply of the main oil pump and the flow of the first and second devices to be cooled. Since this application chooses to supply oil to the devices to be cooled through oil pumps, when the cooling demand of a certain branch increases, adjusting the speed of the corresponding oil pump and the main oil pump can achieve precise control of the oil supply flow of each branch and the total branch, thereby reducing the driving power consumption of the coolant and saving energy.

[0048] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Figure 2 This is a structural diagram of a flow control system provided in an embodiment of this application. Figure 2 As shown, the system may include:

[0050] First oil pump A, main oil pump B, first cooling device C, second cooling device D, and controller E;

[0051] The inlet end a1 of the first oil pump A is connected to the outlet end b2 of the main oil pump B, and the outlet end a2 of the first oil pump A is connected to the first cooling device C to form the first oil supply branch.

[0052] The second cooling device D is connected to the outlet end b2 of the main oil pump B to form the second oil supply branch.

[0053] The controller E may include multiple ports, each of which is connected to a corresponding oil pump. For example, it may include a first port and a second port. The first port may be connected to the first oil pump A, and the second port B may be connected to the second oil pump.

[0054] Controller D can adjust the speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch. This adjustment controls the oil supply of the main oil pump and the flow rate into the first or second cooling device. The oil supply of the main oil pump can be understood as the amount of oil supplied from the main oil pump to each branch.

[0055] The flow control system in this application includes: a first oil pump, a main oil pump, a first device to be cooled, a second device to be cooled, and a controller. The inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first device to be cooled to form a first oil supply branch. The second device to be cooled is connected to the outlet end of the main oil pump to form a second oil supply branch. The controller is used to adjust the speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch, so as to control the oil supply of the main oil pump and the flow of the first and second devices to be cooled. Since this application chooses to supply oil to the devices to be cooled through oil pumps, when the cooling demand of a certain branch increases, adjusting the speed of the corresponding oil pump and the main oil pump can achieve precise control of the oil supply flow of each branch and the total branch, thereby reducing the driving power consumption of the coolant and saving energy.

[0056] In some possible implementations, the system may also include: a second oil pump F and a third cooling device G.

[0057] Specifically, such as Figure 3 As shown, the inlet end f1 of the second oil pump F is connected to the outlet end b2 of the main oil pump B, and the outlet end f2 of the second oil pump F is connected to the third cooling device to form the third oil supply branch.

[0058] In some possible implementations, the first device to be cooled, C, can be a drive motor; the second device to be cooled, D, can be a clutch assembly; and the third device to be cooled, G, can be a generator. Of course, those skilled in the art can also set the first device to be cooled, D, and G, as other components according to actual needs.

[0059] The controller can adjust the speed of the first oil pump A and the main oil pump B according to the oil supply demand Q1 of the first oil supply branch, so as to control the flow rate into the drive motor. For example, if the oil supply demand Q1 of the first oil supply branch increases by 1L, the speed of the first oil pump A increases to 300r / min and the speed of the main oil pump B increases to 200r / min. In this embodiment, Q1 can be determined according to the cooling demand of the drive motor. Then, by controlling the speed of the first oil pump A and the main oil pump B, the flow rate of the first oil supply branch can be controlled, thereby controlling the oil supply of the main oil pump and the flow rate into the drive motor.

[0060] The controller can also adjust the speed of the main oil pump B according to the oil supply demand Q2 of the second oil supply branch to control the flow rate into the clutch assembly. For example, if the oil supply demand Q2 of the second oil supply branch increases by 1L, the speed of the main oil pump B increases to 200r / min. In this embodiment, the clutch assembly may include a clutch, a gear shaft, and bearings. Q2 can be determined according to the cooling requirements of the clutch assembly, and thus the flow rate of the second oil supply branch can be controlled by controlling the speed of the main oil pump B, thereby controlling the oil supply of the main oil pump and the flow rate into the clutch assembly.

[0061] The controller can also adjust the speeds of the second oil pump F and the main oil pump B based on the oil demand Q3 of the third oil supply branch to control the flow rate into the generator. For example, if the oil demand Q3 of the third oil supply branch increases by 1L, the speed of the second oil pump F will increase to 300r / min, and the speed of the main oil pump B will increase to 200r / min. In this embodiment, Q3 can be determined based on the generator's cooling requirements. Therefore, by controlling the speeds of the second oil pump F and the main oil pump B, the flow rate of the second oil supply branch can be controlled, thereby controlling the flow rate into the generator. It should be noted that the controller can also control the main oil pump B to control the oil supply quantity Q of the main oil supply line. Q = oil demand Q1 of the first branch + oil demand Q2 of the second branch + oil demand Q3 of the third branch. In other words, the oil supply quantity of the main oil pump (the oil supply quantity of the main oil supply line) is equal to the sum of the oil demands of each oil supply branch.

[0062] In some possible implementations, there might be situations where the required flow rate of Q2 is large, such as exceeding the flow rate threshold. In this case, it is necessary to adjust the main oil pump outlet pressure Pm to increase Pm. Furthermore, the larger Q2 is, the larger Pm becomes. Assuming that the flow rates of Q1 and Q3 remain constant, and the outlet pressures P1 (pressure at the outlet of the first oil pump) and P2 (pressure at the outlet of the second oil pump) remain constant, then when the required flow rate of Q2 is large, Pm will increase, making Pm greater than the outlet pressure P1 of the first oil pump A and greater than the outlet pressure P2 of the second oil pump B. It should be noted that the inlet pressures of the first and second oil pumps are equal to the outlet pressure Pm of the main oil pump.

[0063] When Pm > P1 and P2, the inlet pressure of the first oil pump and the second oil pump are greater than the outlet pressure. At this time, the controller can control the motor in the first oil pump A and the motor in the second oil pump F to operate. The motor generates resistance torque to stop its operation and generates electricity.

[0064] When the first oil pump A and the second oil pump F are in generator mode, the energy for generation is provided by the main oil pump B. Therefore, the amount of electricity generated is less than the energy consumed by the main oil pump B. At this time, the controller can direct the generated electricity along the circuit of least impedance (i.e., the internal circuit of the controller) to replenish the energy consumption of the main oil pump. The electronic pump controller reduces the energy consumption at the battery terminal, saving energy. Electrical energy does not need to be stored and is directly supplied to the main oil pump for pumping oil, thereby reducing the energy consumption of the main oil pump.

[0065] When the first oil pump A and / or the second oil pump F generates electricity, the controller can control the charging current of the corresponding oil pump to be within a preset current range to prevent the oil pump speed from being too high. It should be noted that... Figure 2 as well as Figure 3 The connection relationship of the controller is just an example and is not limited here.

[0066] The above describes some specific implementations of the flow control system provided in the embodiments of this application. Based on this, this application also provides a corresponding flow control method. The flow control method provided in the embodiments of this application is described below, and this method can be referred to in correspondence with the flow control system described above.

[0067] The flow control method provided in this application can be applied to a flow control system, wherein the flow control system may include: a first oil pump, a main oil pump, a first cooling device and a second cooling device, wherein the inlet end of the first oil pump is connected to the outlet end of the main oil pump, the outlet end of the first oil pump is connected to the first cooling device to form a first oil supply branch, and the second cooling device is connected to the outlet end of the main oil pump to form a second oil supply branch.

[0068] The flow control method includes:

[0069] The speed of the oil pump in the corresponding oil supply branch can be adjusted according to the oil supply demand of each oil supply branch, so as to control the oil supply of the main oil pump and the flow rate into the first and second cooling devices.

[0070] In other words, the speed of the first oil pump and the main oil pump can be adjusted according to the oil demand of the first oil supply branch, and the speed of the main oil pump can be adjusted according to the oil demand of the second oil supply branch. Thus, the oil supply of the main oil pump and the oil supply of the corresponding oil supply branch can be controlled by adjusting the speed of the oil pump in the oil supply branch.

[0071] In some possible implementations, the flow control system further includes a second oil pump and a third cooling device. The inlet of the second oil pump is connected to the outlet of the main oil pump, and the outlet of the second oil pump is connected to the third cooling device to form a third oil supply branch. The first cooling device can be a drive motor, the second cooling device can be a clutch assembly, and the third cooling device can be a generator.

[0072] Specifically, the speed of the first oil pump and the main oil pump can be adjusted according to the oil supply demand of the first oil supply branch, so as to control the oil supply of the main oil pump and the flow rate into the drive motor. The oil supply demand of the first oil supply branch can be determined according to the cooling demand of the drive motor. In other words, the oil supply demand of the first oil supply branch is equal to the oil supply demand of the drive motor.

[0073] The speed of the main oil pump can be adjusted according to the oil supply demand of the second oil supply branch, so as to control the oil supply of the main oil pump and the flow rate into the clutch assembly. The oil supply demand of the second oil supply branch can be determined according to the cooling demand of the clutch assembly. In other words, the oil supply demand of the second oil supply branch is equal to the oil supply demand of the clutch assembly.

[0074] The speeds of the second and main oil pumps can be adjusted according to the oil demand of the third oil supply branch, thereby controlling the oil supply volume of the main oil pump and the flow rate into the generator. The oil demand of the third oil supply branch can be determined based on the cooling requirements of the generator; that is, the oil demand of the third oil supply branch is equal to the oil demand of the generator.

[0075] The flow control method provided in this application is applied to a flow control system, which includes: a first oil pump, a main oil pump, a first cooling device, and a second cooling device; the inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first cooling device to form a first oil supply branch; the second cooling device is connected to the outlet end of the main oil pump to form a second oil supply branch. The flow control method includes:

[0076] Based on the oil supply demand of each oil supply branch, the speed of the oil pump in the corresponding oil supply branch is adjusted. The flow rate into the first and second cooling devices is controlled by the oil supply of the main oil pump. Therefore, when the cooling demand of a certain branch increases, adjusting the speed of the corresponding oil pump and the main oil pump can achieve precise control of the oil supply flow rate of each branch and the total branch, thereby reducing the driving power consumption of the coolant and saving energy.

[0077] In some possible implementations, the method provided in this application can also:

[0078] When the pressure at the first inlet of the first oil pump is greater than the pressure at the first outlet, the first oil pump is controlled to generate electricity, and / or, when the pressure at the second inlet of the second oil pump is greater than the pressure at the second outlet, the second oil pump is controlled to generate electricity.

[0079] The electrical energy generated by the generators of the first oil pump and / or the second oil pump is delivered to the main oil pump to reduce the energy consumption of the main oil pump.

[0080] When the first oil pump and / or the second oil pump generates electricity, the charging current of the corresponding oil pump is controlled within a preset current range to prevent the oil pump speed from being too high.

[0081] In some possible implementations, the method provided in this application can also:

[0082] When the first oil pump and / or the second oil pump generates electricity, the charging current of the corresponding oil pump is controlled to be within a preset current range to prevent the oil pump speed from being too high. The current range can be set according to actual needs.

[0083] This application also provides a vehicle and a computer storage medium for implementing the solution provided in this application.

[0084] The vehicle provided in this application may include the flow control system as described in the first aspect, and be controlled based on the flow control method as described in the second aspect.

[0085] The computer storage medium stores code, and when the code is run, the device running the code implements the method described in any embodiment of this application.

[0086] In the embodiments of this application, the terms "first" and "second" (if they exist) are used only as name identifiers and do not represent the order of first and second.

[0087] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the methods of the above embodiments can be implemented by means of software plus a general-purpose hardware platform. Based on this understanding, the technical solution of this application can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as a read-only memory (ROM) / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network communication device such as a router) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0088] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on its differences from other embodiments. In particular, the apparatus embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0089] The above description is merely an exemplary implementation of this application and is not intended to limit the scope of protection of this application.

Claims

1. A flow control system, characterized in that, include: The system comprises a first oil pump, a main oil pump, a first cooling device, a second cooling device, and a controller. The inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first cooling device to form a first oil supply branch. The second cooling device is connected to the outlet end of the main oil pump to form a second oil supply branch; The controller is used to adjust the speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch, so as to control the oil supply of the main oil pump and the flow rate into the first cooling device and the second cooling device. The system also includes: a second oil pump and a third cooling device; The inlet end of the second oil pump is connected to the outlet end of the main oil pump, and the outlet end of the second oil pump is connected to the third cooling device to form a third oil supply branch. The first device to be cooled is a drive motor, the second device to be cooled is a clutch assembly, and the third device to be cooled is a generator; The controller is specifically used for: According to the oil supply demand of the drive motor, the speed of the first oil pump and the main oil pump are adjusted to control the oil supply of the main oil pump and the flow rate into the drive motor. The speed of the main oil pump is adjusted according to the oil supply demand of the clutch assembly, so as to control the oil supply of the main oil pump and the flow rate into the clutch assembly. The rotational speeds of the second oil pump and the main oil pump are adjusted according to the generator's oil supply demand in order to control the oil supply of the main oil pump and the flow rate into the generator.

2. The system according to claim 1, characterized in that, The controller is also used for: When the pressure at the inlet of the first oil pump is greater than the pressure at the outlet of the first oil pump, the first oil pump is controlled to generate electricity, and / or when the pressure at the inlet of the second oil pump is greater than the pressure at the outlet of the second oil pump, the second oil pump is controlled to generate electricity. The electrical energy generated by the first oil pump and / or the second oil pump is delivered to the main oil pump to reduce the energy consumption of the main oil pump.

3. The system according to claim 1, characterized in that, The controller is also used for: When the first oil pump and / or the second oil pump generates electricity, the charging current corresponding to the oil pump is controlled within a preset current range to prevent the oil pump speed from being too high.

4. A flow control method, characterized in that, The flow control system includes: a first oil pump, a main oil pump, a first cooling device, and a second cooling device; the inlet end of the first oil pump is connected to the outlet end of the main oil pump, and the outlet end of the first oil pump is connected to the first cooling device to form a first oil supply branch; the second cooling device is connected to the outlet end of the main oil pump to form a second oil supply branch. The flow control method includes: According to the oil supply demand of each oil supply branch, the speed of the oil pump in the corresponding oil supply branch is adjusted to control the oil supply of the main oil pump and the flow rate into the first cooling device and the second cooling device. The flow control system further includes: a second oil pump and a third cooling device; the inlet end of the second oil pump is connected to the outlet end of the main oil pump, and the outlet end of the second oil pump is connected to the third cooling device to form a third oil supply branch; the first cooling device is a drive motor, the second cooling device is a clutch assembly, and the third cooling device is a generator; adjusting the speed of the oil pump in the corresponding oil supply branch according to the oil supply demand of each oil supply branch includes: Adjust the speed of the first oil pump and the main oil pump according to the oil supply demand of the drive motor; The speed of the main oil pump is adjusted according to the oil supply demand of the clutch assembly; Adjust the speed of the second oil pump and the main oil pump according to the oil supply demand of the generator; The method further includes: When the pressure at the inlet of the first oil pump is greater than the pressure at the outlet of the first oil pump, the first oil pump is controlled to generate electricity, and / or when the pressure at the inlet of the second oil pump is greater than the pressure at the outlet of the second oil pump, the second oil pump is controlled to generate electricity. The electrical energy generated by the first oil pump and / or the second oil pump is delivered to the main oil pump to reduce the energy consumption of the main oil pump.

5. The method according to claim 4, characterized in that, The method further includes: When the first oil pump and / or the second oil pump generates electricity, the charging current corresponding to the oil pump is controlled within a preset current range to prevent the oil pump speed from being too high.

6. A vehicle, characterized in that, It includes the flow control system as described in any one of claims 1-3, and is controlled based on the flow control method as described in claim 4 or 5.

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