Flow control system and flow control method

Abstract

A flow control system and a flow control method are applied to the technical field of vehicles, the flow control system comprises a first oil pump, a main oil pump, a first to-be-cooled device, a second to-be-cooled device and a controller, the inlet end of the first oil pump is connected with the outlet end of the main oil pump, and the outlet end of the first oil pump is connected with the first to-be-cooled device to form a first oil supply branch; the second to-be-cooled device is connected with the outlet end of the main oil pump to form a second oil supply branch, and the controller is used for adjusting the rotating 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 amount of the main oil pump and control the flow of the first to-be-cooled device and the flow of the second to-be-cooled device. Due to the fact that oil is supplied to the to-be-cooled device through the oil pump, when the cooling requirement corresponding to a certain branch is increased, accurate control over the oil supply flow of each branch and the main branch can be achieved by adjusting the rotating speed of the corresponding oil pump and the rotating speed of the main oil pump, the driving power consumption of cooling liquid is reduced, and energy is saved.

Description

Technical Field

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

[0002] Cars are generally equipped with a cooling system that can be used to cool the engine, clutch and other components to prevent the temperature of these components from being too high, which could cause danger.

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

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

[0005] The present application provides a flow control system to control the flow of coolant, thereby reducing the driving power consumption of the coolant and saving energy. The present application also provides a flow control method.

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

[0007] A first oil pump, a main oil pump, a first device to be cooled, a second device to be cooled, 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 device to be cooled to form a first oil supply branch;

[0009] The second device to be cooled 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 control the flow rate flowing into the first device to be cooled and the second device to be cooled.

[0011] Optionally, the system further comprises: a second oil pump and a third device to be cooled;

[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 rotation speed of the first oil pump and the main oil pump is adjusted to control the oil supply of the main oil pump and the flow rate flowing into the drive motor;

[0016] According to the oil supply demand of the clutch assembly, the speed of the main oil pump is adjusted to control the oil supply of the main oil pump and the flow rate flowing into the clutch assembly;

[0017] According to the oil supply demand of the generator, the rotation speeds of the second oil pump and the main oil pump are adjusted to control the oil supply of the main oil pump and the flow rate flowing into the generator.

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

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

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

[0021] Optionally, the controller is further 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 to be within a preset current range to prevent the rotation speed of the oil pump from being too high.

[0023] In a second aspect, the present application provides a flow control method, which is applied to a flow control system, the flow control system comprising: a first oil pump, a main oil pump, a first device to be cooled, and a second device to be cooled; 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 flow control method comprises:

[0024] 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, and the flow rate flowing into the first device to be cooled and the second device to be cooled 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 device to be cooled; 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 speed of the oil pump in the corresponding oil supply branch is adjusted according to the oil supply demand of each oil supply branch, including:

[0026] According to the oil supply demand of the drive motor, adjusting the rotation speed of the first oil pump and the main oil pump;

[0027] adjusting the speed of the main oil pump according to the oil supply demand of the clutch assembly;

[0028] The rotation speeds of the second oil pump and the main oil pump are adjusted according to the oil supply demand of the generator.

[0029] Optionally, the method further includes:

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

[0031] The electric energy generated by the first oil pump and / or the second oil pump is transmitted 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 to be within a preset current range to prevent the rotation speed of the oil pump from being too high.

[0034] In a third aspect, the present application provides a vehicle, comprising a flow control system as described in the first aspect, and controlled based on the flow control method as described in the second aspect.

[0035] In a fourth aspect, an embodiment of the present application provides a computer storage medium, in which a code is stored. When the code is executed, a device executing the code implements the method described in any one of the first aspects above.

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

[0037] The flow control system in the present 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, wherein 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, and 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 control the flow of the first device to be cooled and the second device to be cooled. Since the present application chooses to supply oil to the device to be cooled through the oil pump, when the cooling demand corresponding to a branch increases, the speed of the corresponding oil pump and the main oil pump is adjusted to 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

[0041] Figure 3 A structural diagram of another flow control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] It should be noted that the flow control system and flow control method provided by the present application are used in the field of vehicle technology. The above is only an example and does not limit the application field of the method and device provided by the present application.

[0044] Cars are generally equipped with a cooling system that can be used to cool the engine, clutch and other components to prevent the temperature of these components from being too high, which could cause danger.

[0045] like Figure 1 As shown, Figure 1 The structure diagram of the current cooling system, A, B and C are damping holes respectively, and the coolant is retained to the device that needs to be cooled through the damping control, 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 to be cooled in the branch where C is located increases, the total flow rate flowing through A needs to be increased to meet the cooling demand of C. The coolant flow rates of the total branch where A is located and the branch where B is located are both increased, resulting in an increase in the driving power consumption of the driving coolant, wasting energy.

[0047] In view of this, the present application provides a flow control system, the flow control system in the present 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, 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 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 control the flow of the first device to be cooled and the second device to be cooled. Since the present application chooses to supply oil to the device to be cooled through the oil pump, when the cooling demand corresponding to a branch increases, the speed of the corresponding oil pump and the main oil pump can be adjusted to 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] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

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

[0050] A first oil pump A, a main oil pump B, a first device to be cooled C, a second device to be cooled D and a 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 device to be cooled C, so as to form a first oil supply branch.

[0052] The second device to be cooled D is connected to the outlet port b2 of the main oil pump B to form a second oil supply branch.

[0053] The controller E may include multiple ports, each port is connected to a corresponding oil pump, for example, 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] The 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, thereby controlling the oil supply of the main oil pump and the flow rate flowing into the first device to be cooled or the second device to be cooled by adjusting the speed of the oil pump in the oil supply branch. The oil supply of the main oil pump can be understood as the oil supply flowing from the main oil pump to each branch.

[0055] The flow control system in the present 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, wherein 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, and 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 control the flow of the first device to be cooled and the second device to be cooled. Since the present application chooses to supply oil to the device to be cooled through the oil pump, when the cooling demand corresponding to a branch increases, the speed of the corresponding oil pump and the main oil pump is adjusted to 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 further include: a second oil pump F and a third device G to be cooled.

[0057] Specifically, 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 device to be cooled to form a 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 C, the second device to be cooled D and the third device to be cooled 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 to control the flow into the drive motor. For example, the oil supply demand Q1 of the first oil supply branch increases by 1L, and 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 requirement of the drive motor, and then the flow of the first oil supply branch can be controlled by controlling the speed of the first oil pump A and the main oil pump B, thereby controlling the oil supply of the main oil pump and controlling the flow 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 into the clutch assembly. For example, when 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 a bearing, etc. Q2 can be determined according to the cooling demand of the clutch assembly, and then the flow 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 into the clutch assembly.

[0061] The controller can also adjust the speed of the second oil pump F and the main oil pump B according to the oil supply demand Q3 of the third oil supply branch to control the flow rate flowing into the generator. For example, when the oil supply demand Q3 of the third oil supply branch increases by 1L, the corresponding speed of the second oil pump F also increases to 300r / min, and the speed of the main oil pump B also increases to 200r / min. In this embodiment, Q3 can be determined according to the cooling demand of the generator, and then the flow rate of the second oil supply branch can be controlled by controlling the speed of the second oil pump F and the main oil pump B, thereby controlling the flow rate flowing into the generator. It should be noted that the purpose of the controller controlling the main oil pump B can also be to control the oil supply Q of the main oil supply circuit, Q = the oil supply demand Q1 of the first branch + the oil supply demand Q2 of the second branch + the oil supply demand Q3 of the third branch, that is, the oil supply of the main oil pump (the oil supply of the main oil supply circuit) is equal to the sum of the oil supply demands of each oil supply branch.

[0062] In some possible implementations, there may be a situation where the flow rate of Q2 is relatively large, for example, greater than the flow rate threshold. In this case, it is necessary to adjust the outlet pressure Pm of the main oil pump so that Pm increases. And the larger the Q2, the larger the Pm. Assuming that the flow rates of Q1 and Q3 remain unchanged at this time, the outlet pressure P1 of the first oil pump A (the pressure at the outlet end of the first oil pump) and the outlet pressure P2 of the second oil pump F (the pressure at the outlet end of the second oil pump) remain unchanged. Therefore, when the flow rate demand of Q2 is large, Pm will increase, so that Pm is greater than the outlet pressure P1 of the first oil pump A and Pm is greater than the outlet pressure P2 of the second oil pump B. It should be noted that the inlet pressure of the first oil pump (the pressure at the inlet end of the first oil pump) and the inlet pressure of the second oil pump (the pressure at the inlet end of the second oil pump) are equal to the outlet pressure Pm of the main oil pump.

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

[0064] When the first oil pump A and the second oil pump F are in the power generation state, the power generation energy is provided by the main oil pump B, so the power generation is less than the energy consumed by the main oil pump B. At this time, the controller can control the generated electricity along the circuit with the smallest 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 of the battery end and saves energy. The electric energy does not need to be stored and is directly provided 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 generate electricity, the controller can control the charging current corresponding to the oil pump to be within a preset current range to prevent the oil pump from rotating at an excessively high speed. Figure 2 as well as Figure 3 The connection relationship of the controllers is just an example and is not limited here.

[0066] The above are some specific implementations of the flow control system provided by the embodiments of the present application. Based on this, the present application also provides a corresponding flow control method. The flow control method provided by the embodiments of the present application is introduced below, and the method and the flow control system described above can be referred to each other.

[0067] The flow control method provided in the present 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 device to be cooled, and a second device to be cooled, 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 device to be cooled to form a first oil supply branch, and the second device to be cooled 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 each oil supply branch can be adjusted according to the oil supply demand of each oil supply branch to control the oil supply of the main oil pump and the flow rate flowing into the first device to be cooled and the second device to be cooled.

[0070] In other words, the speeds 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, and the speed of the main oil pump can be adjusted according to the oil supply demand of the second oil supply branch, thereby controlling the oil supply of the main oil pump and the oil supply of the corresponding oil supply branch by adjusting the speeds of the oil pumps in the oil supply branches.

[0071] In some possible implementations, the flow control system further includes: a second oil pump and a third device to be cooled, 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 may be a drive motor, the second device to be cooled may be a clutch assembly, and the third device to be cooled may be a generator.

[0072] Specifically, the rotation 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 flowing into the drive motor, wherein the oil supply demand of the first oil supply branch can be determined according to the cooling demand of the drive motor, that is, 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 to control the oil supply of the main oil pump and the flow rate into the clutch assembly, wherein the oil supply demand of the second oil supply branch can be determined according to the cooling demand of the clutch assembly, that is, the oil supply demand of the second oil supply branch is equal to the oil supply demand of the clutch assembly.

[0074] The rotation speeds of the second oil pump and the main oil pump can be adjusted according to the oil supply demand of the third oil supply branch, so as to control the oil supply of the main oil pump and the flow rate into the generator, wherein the oil supply demand of the third oil supply branch can be determined according to the cooling demand of the generator, that is, the oil supply demand of the third oil supply branch is equal to the oil supply demand of the generator.

[0075] The flow control method provided by the present application is applied to a flow control system, the flow control system comprising: a first oil pump, a main oil pump, a first device to be cooled, and a second device to be cooled; 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 device to be cooled, so as to form a first oil supply branch; the second device to be cooled is connected to the outlet end of the main oil pump, so as to form a second oil supply branch flow control method, comprising:

[0076] 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, and the oil supply of the main oil pump is used to control the flow rate into the first device to be cooled and the second device to be cooled. Therefore, when the cooling demand corresponding to a branch increases, the speed of the corresponding oil pump and the main oil pump is adjusted to 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 by the present application may also:

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

[0079] The electric energy generated by the first oil pump and / or the second oil pump is transmitted 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 corresponding to the oil pump is controlled to be within a preset current range to prevent the rotation speed of the oil pump from being too high.

[0081] In some possible implementations, the method provided by the present application may also:

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

[0083] The embodiments of the present application also provide a vehicle and a computer storage medium for implementing the solutions provided in the embodiments of the present application.

[0084] Among them, the vehicle provided by the present application may include a 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 codes, and when the codes are executed, a device executing the codes implements the method described in any embodiment of the present application.

[0086] The "first" and "second" in the names such as "first" and "second" (if any) mentioned in the embodiments of the present application are only used as name identifiers and do not represent the first or second in order.

[0087] As can be seen from the description of the above embodiments, those skilled in the art can clearly understand that all or part of the steps in the above method embodiments can be implemented by means of software plus a general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, and the computer software product can be stored in a storage medium, such as read-only memory (ROM) / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing 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 the present application.

[0088] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the relevant parts, reference can be made to the partial description of the method embodiment. One can select some or all of the modules according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0089] The above is only an exemplary embodiment of the present application and is not used to limit the protection scope of the present application.

Claims

1. A flow control system, It is characterized in that include: 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 control the flow rate flowing into the first device to be cooled and the second device to be cooled.

2. The system according to claim 1, It is characterized in that The system further comprises: a second oil pump and a third device to be cooled; 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.

3. The system according to claim 2, It is characterized in that The first device to be cooled is a driving 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 rotation speed of the first oil pump and the main oil pump is adjusted to control the oil supply of the main oil pump and the flow rate flowing into the drive motor; According to the oil supply demand of the clutch assembly, the speed of the main oil pump is adjusted to control the oil supply of the main oil pump and the flow rate flowing into the clutch assembly; According to the oil supply demand of the generator, the rotation speeds of the second oil pump and the main oil pump are adjusted to control the oil supply of the main oil pump and the flow rate flowing into the generator.

4. The system according to claim 3, It is characterized in that The controller is also used for: When the pressure at the inlet end of the first oil pump is greater than the pressure at the outlet end of the first oil pump, the first oil pump is controlled to generate electricity, and / or, when the pressure at the inlet end of the second oil pump is greater than the pressure at the outlet end, the second oil pump is controlled to generate electricity; The electric energy generated by the first oil pump and / or the second oil pump is transmitted to the main oil pump to reduce the energy consumption of the main oil pump.

5. The system according to claim 1, It is 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 to be within a preset current range to prevent the rotation speed of the oil pump from being too high.

6. A flow control method, It is characterized in that Applied to a flow control system, the flow control system comprises: a first oil pump, a main oil pump, a first device to be cooled and a second device to be cooled; 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 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 flow control method comprises: 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 flowing into the first device to be cooled and the second device to be cooled.

7. The method according to claim 6, It is characterized in that The flow control system further includes: a second oil pump and a third device to be cooled; 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 speed of the oil pump in the corresponding oil supply branch is adjusted according to the oil supply demand of each oil supply branch, including: According to the oil supply demand of the drive motor, adjusting the rotation speed of the first oil pump and the main oil pump; adjusting the speed of the main oil pump according to the oil supply demand of the clutch assembly; The rotation speeds of the second oil pump and the main oil pump are adjusted according to the oil supply demand of the generator.

8. The method according to claim 7, It is characterized in that The method further comprises: When the pressure at the inlet end of the first oil pump is greater than the pressure at the outlet end of the first oil pump, the first oil pump is controlled to generate electricity, and / or, when the pressure at the inlet end of the second oil pump is greater than the pressure at the outlet end, the second oil pump is controlled to generate electricity; The electric energy generated by the first oil pump and / or the second oil pump is transmitted to the main oil pump to reduce the energy consumption of the main oil pump.

9. The method according to claim 8, It is characterized in that The method further comprises: When the first oil pump and / or the second oil pump generates electricity, the charging current corresponding to the oil pump is controlled to be within a preset current range to prevent the rotation speed of the oil pump from being too high.

10. A vehicle, It is characterized in that It comprises the flow control system as described in claims 1-5, and is controlled based on the flow control method as described in claims 6-9.

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