Cooling lubrication system, method, terminal device and vehicle

Abstract

The application provides a cooling lubrication system, method, terminal device and vehicle, wherein the cooling lubrication system comprises an electric oil pump, a heat exchanger and a three-way proportional valve; the electric oil pump is communicated with the heat exchanger through a pipeline, and is used for delivering lubricating oil to the heat exchanger; the heat exchanger is used for cooling or heating the lubricating oil; the three-way proportional valve is communicated with the heat exchanger through a pipeline, and is communicated with a lubrication circuit and a cooling circuit; the three-way proportional valve is used for distributing the oil amount of the lubrication circuit and the oil amount in the cooling circuit to form three working modes, and the three working modes comprise a cooling mode, a lubrication mode and a proportional mixing mode, wherein: the cooling mode is that the lubrication circuit is closed and the cooling circuit is opened; the lubrication mode is that the lubrication circuit is opened and the cooling circuit is closed; and the proportional mixing mode is that the lubrication circuit and the cooling circuit are simultaneously opened, and the opening degree proportion of the three-way proportional valve satisfies a preset condition. The application can improve the utilization rate of lubricating oil and energy consumption and reduce energy consumption.

Description

Technical Field

[0001] This application relates to the field of electric drive integration, and more specifically, to a cooling and lubrication system, method, terminal equipment, and vehicle. Background Technology

[0002] There are two main types of cooling and lubrication systems for the electric drive systems of existing new energy pure electric vehicles:

[0003] 1. The motor is water-cooled, the differential reducer is splash-lubricated, and the bearings are grease-lubricated / splash-lubricated. The motor housing is designed with dedicated cooling water channels, and heat exchange is achieved through cooling water circulation. The design of the water channels increases the outer size of the motor, resulting in lower overall vehicle space utilization, which is not conducive to the layout and utilization of the electric drive assembly. The water channels also increase costs.

[0004] 2. Motor oil cooling + differential reducer active lubrication + bearing active lubrication. Cooling and lubrication are powered by an electric oil pump. Compared to Scheme 1, this scheme saves on the design of cooling water channels and the outer envelope size of the motor is smaller. Cooling and lubrication share the same pipeline and are carried out simultaneously. The amount of cooling oil and lubricating oil in the electric drive system cannot be independently and precisely controlled. Summary of the Invention

[0005] The purpose of this application is to provide a cooling and lubrication system, method, terminal equipment, and vehicle to improve the utilization rate of lubricating oil and energy consumption and reduce energy consumption.

[0006] In a first aspect, the present invention provides a cooling and lubrication system, wherein the cooling and lubrication system includes an electric oil pump, a heat exchanger, and a three-way proportional valve;

[0007] The electric oil pump is connected to the heat exchanger through a pipeline. The electric oil pump is used to deliver lubricating oil to the heat exchanger, and the heat exchanger is used to cool or heat the lubricating oil.

[0008] The three-way proportional valve is connected to the heat exchanger via a pipeline, and is also connected to the lubrication circuit and the cooling circuit. The three-way proportional valve is used to distribute the oil quantity in the lubrication circuit and the oil quantity in the cooling circuit to form three operating modes: cooling mode, lubrication mode, and proportional mixing mode.

[0009] The cooling mode is characterized by the lubrication circuit being closed and the cooling circuit being open.

[0010] The lubrication mode is characterized by the lubrication circuit being open and the cooling circuit being closed.

[0011] The proportional mixing mode is characterized by the simultaneous opening of the lubrication circuit and the cooling circuit, and the opening ratio of the three-way proportional valve meeting preset conditions.

[0012] The first aspect of this application utilizes a three-way proportional valve to switch between three operating modes. In cooling mode, the amount of lubricating oil required for cooling can be independently controlled, while in lubrication mode, the amount of lubricating oil required for lubrication can be independently controlled. This decouples the lubricating oil quantities needed for cooling and lubrication, ensuring that the control of the lubricating oil quantity for cooling is unaffected by the lubricating oil quantity, and vice versa. This improves the precision of lubricating oil control, thereby increasing lubricating oil utilization and energy efficiency, and reducing energy consumption. Simultaneously, the proportional mixing mode also accommodates scenarios requiring simultaneous cooling and lubrication. In such scenarios, adjusting the opening ratio of the three-way proportional valve and the electric oil pump allows for precise control of the oil quantity according to demand, further reducing energy consumption. Furthermore, the three-way proportional valve and electric oil pump enhance the adjustment range and flexibility of the oil quantity.

[0013] In a first aspect of this application, as an optional embodiment, the cooling and lubrication system further includes a filter, wherein the filter is in communication with the electric oil pump, and the filter is used to filter the lubricating oil. In this optional embodiment, filtering the lubricating oil prevents impurities in the lubricating oil from entering the electric drive system.

[0014] In a first aspect of this application, as an optional embodiment, the cooling and lubrication system further includes an oil reservoir, wherein the oil reservoir is in communication with the filter, and the oil reservoir is used to store and recover the lubricating oil.

[0015] This optional implementation can provide and recover lubricating oil through an oil reservoir.

[0016] In a first aspect of this application, as an optional implementation, the cooling and lubrication system further includes a first nozzle, which is connected to the cooling circuit and is used to spray the lubricating oil onto the electric drive and transmission system to cool the electric drive and transmission system.

[0017] In this optional embodiment, the lubricating oil can be sprayed onto the electric drive and transmission system through a first nozzle to cool the electric drive and transmission system.

[0018] In a first aspect of this application, as an optional embodiment, the cooling and lubrication system further includes a second nozzle, which is connected to the lubrication circuit and is used to spray the lubricating oil onto the electric drive and the transmission system to lubricate the electric drive and the transmission system.

[0019] In this optional embodiment, the lubricating oil can be sprayed onto the electric drive and the transmission system through a second nozzle to lubricate the electric drive and the transmission system.

[0020] In a second aspect, the present invention provides a cooling and lubrication method, the method being applied to a cooling and lubrication system as described in any of the foregoing embodiments, the method comprising:

[0021] Acquire the status of the electric drive and the transmission system;

[0022] When the state of the transmission system indicates that the transmission system has stopped operating, and the state of the electric drive indicates that the temperature of the electric drive is greater than or equal to a first preset threshold, the three-way proportional valve is controlled to close the lubrication circuit and open the cooling circuit.

[0023] When the state of the transmission system indicates that the transmission system is operating, and the state of the electric drive indicates that the temperature of the electric drive is less than a second preset threshold, the three-way proportional valve is controlled to open the lubrication circuit and close the cooling circuit.

[0024] When the state of the transmission system indicates that the transmission system is operating, based on the state of the transmission system and the state of the electric drive, the three-way proportional valve is controlled so that the lubrication circuit and the cooling circuit are opened simultaneously, and the opening ratio of the three-way proportional valve meets the preset conditions.

[0025] The method of the second aspect of this application can obtain the state of the electric drive and the state of the transmission system. When the state of the transmission system indicates that the transmission system is stopped, and the state of the electric drive indicates that the temperature of the electric drive is greater than or equal to a first preset threshold, the method can control the three-way proportional valve to close the lubrication circuit and open the cooling circuit. When the state of the transmission system indicates that the transmission system is running, and the state of the electric drive indicates that the temperature of the electric drive is less than a second preset threshold, the method can control the three-way proportional valve to open the lubrication circuit and close the cooling circuit. When the state of the transmission system indicates that the transmission system is running, based on the state of the transmission system and the state of the electric drive, the method can control the three-way proportional valve to simultaneously open the lubrication circuit and the cooling circuit, and the opening ratio of the three-way proportional valve satisfies a preset condition. The three-way proportional valve enables switching between three operating modes. In cooling mode, the amount of lubricating oil required for cooling can be independently controlled, while in lubrication mode, the amount of lubricating oil required for lubrication can be independently controlled. This decouples the lubricating oil amounts required for cooling and lubrication, ensuring that the control of the lubricating oil amount for cooling is unaffected by the lubricating oil amount, and vice versa. This improves the precision of lubricating oil control, thereby increasing lubricating oil utilization and energy efficiency, and reducing energy consumption. Simultaneously, the proportional mixing mode is compatible with scenarios requiring simultaneous cooling and lubrication. In such scenarios, adjusting the opening ratio of the three-way proportional valve and the electric oil pump allows for precise control of the oil amount according to demand, further reducing energy consumption. The three-way proportional valve and electric oil pump also enhance the adjustment range and flexibility of the oil amount. In an optional embodiment, the method further includes:

[0026] When the state of the transmission system indicates that the transmission system has stopped operating, and the state of the electric drive indicates that the temperature of the electric drive is greater than or equal to a first preset threshold, the speed of the electric oil pump is adjusted to adjust the output oil volume of the electric oil pump.

[0027] This optional implementation allows for adjustment of the rotational speed of the electric oil pump to control the output oil volume, thereby enabling more precise adjustment of the oil supply based on the adjustment of the electric oil pump's rotational speed.

[0028] In an optional implementation, the rotational speed of the electric oil pump is determined based on the temperature of the electric drive.

[0029] This optional implementation can determine the rotational speed of the electric oil pump based on the temperature of the electric drive.

[0030] Thirdly, the present invention provides a terminal device for performing the cooling and lubrication method as described in any of the foregoing embodiments.

[0031] Terminal equipment of the third aspect of this application

[0032] The three-way proportional valve enables switching between three operating modes. In cooling mode, the amount of lubricating oil required for cooling can be independently controlled, while in lubrication mode, the amount of lubricating oil required for lubrication can be independently controlled. This decoupling of the lubricating oil quantities needed for cooling and lubrication means that the control of the lubricating oil quantity for cooling is unaffected by the lubricating oil quantity, and vice versa. This improves the precision of lubricating oil control, thereby increasing lubricating oil utilization and energy efficiency, and reducing energy consumption. Simultaneously, the proportional mixing mode is compatible with scenarios requiring simultaneous cooling and lubrication. In such scenarios, adjusting the opening ratio of the three-way proportional valve and the electric oil pump allows for precise control of the oil quantity according to demand, further reducing energy consumption. The three-way proportional valve and electric oil pump also enhance the adjustment range and flexibility of the oil quantity.

[0033] Fourthly, the present invention provides a vehicle comprising a cooling and lubrication system as described in any of the foregoing embodiments and a terminal device as described in the foregoing embodiments.

[0034] The vehicle in the third aspect of this application

[0035] The three-way proportional valve enables switching between three operating modes. In cooling mode, the amount of lubricating oil required for cooling can be independently controlled, while in lubrication mode, the amount of lubricating oil required for lubrication can be independently controlled. This decoupling of the lubricating oil quantities needed for cooling and lubrication means that the control of the lubricating oil quantity for cooling is unaffected by the lubricating oil quantity, and vice versa. This improves the precision of lubricating oil control, thereby increasing lubricating oil utilization and energy efficiency, and reducing energy consumption. Simultaneously, the proportional mixing mode is compatible with scenarios requiring simultaneous cooling and lubrication. In such scenarios, adjusting the opening ratio of the three-way proportional valve and the electric oil pump allows for precise control of the oil quantity according to demand, further reducing energy consumption. The three-way proportional valve and electric oil pump also enhance the adjustment range and flexibility of the oil quantity. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a cooling and lubrication system provided in the embodiments of this application;

[0038] Figure 2 This is a schematic diagram of a cooling mode disclosed in an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of a lubrication mode disclosed in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of a proportional mixing mode disclosed in an embodiment of this application;

[0041] Figure 5 This is a schematic flowchart of a cooling and lubrication method disclosed in an embodiment of this application;

[0042] Icons: 1-First bearing; 2-Fourth bearing; 3-Intermediate shaft gear; 4-First wheel; 5-First half-shaft; 6-Sixth bearing; 7-Differential reduction gear; 8-Seventh bearing; 9-Second half-shaft; 10-Second wheel; 11-Filter; 12-Electric oil pump; 13-Oil reservoir; 14-Heat exchanger; 15-Fifth bearing; 16-Three-way proportional valve; 17-Third bearing; 18-Input shaft gear; 19-Second bearing; 20-Motor. Detailed Implementation

[0043] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0044] Example 1

[0045] Please see Figure 1 , Figure 1 This application provides a cooling and lubrication system, which includes an electric oil pump 12, a heat exchanger 14, and a three-way proportional valve 16. Further, the electric oil pump 12 is connected to the heat exchanger 14 through a pipeline. The electric oil pump 12 is used to deliver lubricating oil to the heat exchanger 14, and the heat exchanger 14 is used to cool or heat the lubricating oil. Specifically, when it is necessary to heat the electric drive, the heat exchanger 14 is used to heat the lubricating oil, and when it is necessary to cool the electric drive, the heat exchanger 14 is used to cool the lubricating oil.

[0046] Furthermore, the three-way proportional valve 16 is connected to the heat exchanger 14 via a pipeline, and is also connected to the lubrication circuit and the cooling circuit. The three-way proportional valve 16 is used to distribute the oil quantity in the lubrication circuit and the oil quantity in the cooling circuit, wherein, for example... Figure 1 As shown, the three-way proportional valve 16 has AB circuit and AC circuit. AC circuit refers to the cooling circuit, while AB circuit refers to the lubrication circuit. Furthermore, the state combinations of AC circuit and AB circuit form three operating modes: cooling mode, lubrication mode, and proportional mixing mode. In the cooling mode, the lubrication circuit is closed and the cooling circuit is open; in the lubrication mode, the lubrication circuit is open and the cooling circuit is closed; in the proportional mixing mode, both the lubrication circuit and the cooling circuit are open simultaneously, and the opening ratio of the three-way proportional valve 16 meets the preset conditions.

[0047] In this application embodiment, for the cooling mode, please refer to... Figure 2 ,in, Figure 2 This is a schematic diagram of a cooling mode disclosed in an embodiment of this application. For example... Figure 2 As shown, in cooling mode, the lubrication circuit is closed and the cooling circuit is open, thus the lubricating oil flows along... Figure 2 The arrows in the diagram indicate the direction of the flow.

[0048] In this application embodiment, for the lubrication mode, please refer to... Figure 3 ,in, Figure 3 This is a schematic diagram of a lubrication mode disclosed in an embodiment of this application. For example... Figure 3 As shown, in lubrication mode, the lubrication circuit is open and the cooling circuit is closed, thus the lubricating oil flows along... Figure 3 The arrows in the diagram indicate the direction of the flow.

[0049] In this application embodiment, for the proportional mixing mode, please refer to... Figure 4 , Figure 4 This is a schematic diagram of a proportional mixing mode disclosed in an embodiment of this application. For example... Figure 4 As shown, when switching to the proportional mixing mode, the lubricating oil output by the electric oil pump 12 flows along... Figure 4 The arrows in the diagram indicate flow along both the AC and AB circuits, thus simultaneously initiating cooling and lubrication.

[0050] In this embodiment, the three-way proportional valve 16 enables switching between three operating modes. In cooling mode, the amount of lubricating oil required for cooling can be independently controlled, while in lubrication mode, the amount of lubricating oil required for lubrication can be independently controlled. This decouples the lubricating oil amounts required for cooling and lubrication, ensuring that the control of the lubricating oil amount for cooling is unaffected by the lubricating oil amount required for lubrication, and vice versa. This ultimately improves oil control accuracy, thereby reducing energy consumption and increasing oil and energy efficiency. Furthermore, the proportional mixing mode is compatible with scenarios requiring simultaneous cooling and lubrication. In such scenarios, adjusting the opening ratio of the three-way proportional valve 16 and the electric oil pump 12 allows for precise control of the oil amount according to demand, further reducing energy consumption. The three-way proportional valve 16 and the electric oil pump 12 also enhance the adjustment range and flexibility of the oil amount.

[0051] In this embodiment of the application, as an example, the prior art does not distinguish between the cooling circuit and the lubrication circuit. As a result, if the motor 20 needs lubrication but the bearing does not, when lubricating oil is sprayed, the lubricating oil will lubricate both the motor 20 and the bearing at the same time. This results in the lubricating oil not being sprayed entirely onto the motor 20 that actually needs lubrication, thus the utilization rate of the lubricating oil is low. Furthermore, since some lubricating oil is wasted on the bearing that does not need lubrication, in order to ensure that enough lubricating oil is sprayed onto the motor 20, the electric oil pump 12 needs to output more lubricating oil. As a result, the electric oil pump 12 needs more energy to output more lubricating oil. Therefore, the prior art also has the defects of low energy consumption and low utilization rate.

[0052] Compared to existing technologies, the embodiments of this application can switch to a lubrication mode for the motor 20 that requires lubrication and the bearing that does not require lubrication. This allows the lubricating oil to flow only along the lubrication circuit, thus lubricating only the motor 20 and not the bearing along the cooling circuit. Therefore, when lubricating the motor 20, all the lubricating oil output by the electric oil pump 12 can be used to lubricate the motor 20, thereby improving the utilization rate of the lubricating oil. Furthermore, the electric oil pump 12 does not need to use additional electrical energy to ensure that the motor 20 has enough lubricating oil, ultimately reducing energy consumption and improving energy utilization.

[0053] In this embodiment of the application, as an optional implementation, the cooling and lubrication system further includes a filter 11, wherein the filter 11 is connected to the electric oil pump 12 and is used to filter lubricating oil.

[0054] In this optional embodiment, the lubricating oil is filtered by filter 11 to prevent impurities in the lubricating oil from entering the electric drive system, thereby preventing impurities in the lubricating oil from damaging the electric drive system.

[0055] In this embodiment, as an optional implementation, the cooling and lubrication system further includes an oil reservoir 13, which is connected to the filter 11 and is used to store and recover lubricating oil. This optional implementation can provide and recover lubricating oil through the oil reservoir 13.

[0056] In an embodiment of this application, as an optional implementation, the cooling and lubrication system further includes a first nozzle, which is connected to a cooling circuit and used to spray lubricating oil onto the electric drive and transmission system to cool them. Further, as... Figure 2 The cooling circuit, i.e., the AC circuit, is connected to three first nozzles, which are arranged horizontally and positioned above the motor 20. Under the action of the electric oil pump 12, lubricating oil flows to the three first nozzles and is sprayed out, thus spraying lubricating oil onto the motor 20 to cool it. Therefore, this optional embodiment can spray lubricating oil onto the electric drive and transmission system through the first nozzles to cool them. Accordingly, the electric drive may include the motor 20 and other auxiliary components, while the transmission system is connected to the electric drive to transmit the power output. For example, the electric drive includes a first bearing 1, a second bearing 19, and the motor 20, and the transmission system may include an input shaft gear 18, a third bearing 13, a fourth bearing 2, an intermediate shaft gear 3, and a fifth bearing 15. Further, the transmission system can be connected to the first wheel 4 and the second wheel 10 via a first half-shaft 5, a sixth bearing 6, a differential gear 7, a seventh bearing 8, and a second half-shaft 9.

[0057] In this embodiment, as an optional implementation, the cooling and lubrication system further includes a second nozzle, which is connected to the lubrication circuit and used to spray lubricating oil onto the electric drive and transmission system to lubricate them. Specifically, as... Figure 3 As shown, the lubrication circuit, i.e., the AB circuit, is connected to five second nozzles. In this way, lubricating oil is sprayed from the five second nozzles to lubricate the electric drive and transmission system. Therefore, this optional embodiment can spray lubricating oil onto the electric drive and transmission system through the second nozzles to lubricate them.

[0058] Example 2

[0059] Please see Figure 5 , Figure 5This is a schematic flowchart of a cooling and lubrication method disclosed in an embodiment of this application, wherein the method is applied to a cooling and lubrication system as described in any of the foregoing embodiments. Figure 5 As shown, the method in this application embodiment includes the following steps:

[0060] 101. Obtain the status of the electric drive and the transmission system;

[0061] 102. When the state indicator of the transmission system is that the transmission system has stopped operating, and the state indicator of the electric drive is that the temperature of the electric drive is greater than or equal to the first preset threshold, control the three-way proportional valve to close the lubrication circuit and open the cooling circuit.

[0062] 103. When the status indicator of the transmission system is that the transmission system is running, and the status indicator of the electric drive is that the temperature of the electric drive is less than the second preset threshold, control the three-way proportional valve to open the lubrication circuit and close the cooling circuit.

[0063] 104. When the state of the transmission system indicates that the transmission system is operating, based on the state of the transmission system and the state of the electric drive, control the three-way proportional valve so that the lubrication circuit and the cooling circuit are opened simultaneously, and the opening ratio of the three-way proportional valve meets the preset conditions.

[0064] The method in this application embodiment can obtain the state of the electric drive and the state of the transmission system. When the state of the transmission system indicates that the transmission system is stopped, and the state of the electric drive indicates that the temperature of the electric drive is greater than or equal to a first preset threshold, the three-way proportional valve can be controlled to close the lubrication circuit and open the cooling circuit. When the state of the transmission system indicates that the transmission system is running, and the state of the electric drive indicates that the temperature of the electric drive is less than a second preset threshold, the three-way proportional valve can be controlled to open the lubrication circuit and close the cooling circuit. When the state of the transmission system indicates that the transmission system is running, based on the state of the transmission system and the state of the electric drive, the three-way proportional valve can be controlled to open the lubrication circuit and the cooling circuit simultaneously, and the opening ratio of the three-way proportional valve meets a preset condition. This system utilizes a three-way proportional valve to switch between three operating modes. In cooling mode, the amount of lubricating oil required for cooling can be independently controlled, while in lubrication mode, the amount of lubricating oil required for lubrication can be independently controlled. This decoupling of lubricating oil volume for cooling and lubrication ensures that the control of lubricating oil volume for cooling is unaffected by the lubrication volume, and vice versa. This improves oil control precision, thereby reducing energy consumption and increasing oil and energy efficiency. Furthermore, the proportional mixing mode is compatible with scenarios requiring simultaneous cooling and lubrication. In such scenarios, adjusting the opening ratio of the three-way proportional valve and the electric oil pump allows for precise control of the oil volume according to demand, further reducing energy consumption. The three-way proportional valve and electric oil pump also enhance the adjustment range and flexibility of the oil volume.

[0065] In this embodiment, the three-way proportional valve's opening ratio meeting the preset condition means that the valve's opening ratio meets the requirements of the operating conditions. For example, when the vehicle is climbing a hill, the transmission system rotates slowly, while the motor's torque is high and it is prone to overheating. In this case, the three-way proportional valve's opening ratio can be 4:6, where 60% of the lubricating oil is used to cool the motor, and 40% is used to lubricate the transmission system. As another example, when the vehicle is traveling at high speed, the gears rotate at high speeds, and the need to prevent wear is high. In this case, the three-way proportional valve's opening ratio can be set to 6:4, where 60% of the lubricating oil is used to lubricate the transmission system.

[0066] In an optional implementation of this application, the method further includes the following steps:

[0067] When the state of the transmission system indicates that the transmission system has stopped operating, and the state of the electric drive indicates that the temperature of the electric drive is greater than or equal to a first preset threshold, the speed of the electric oil pump is adjusted to adjust the output oil volume of the electric oil pump.

[0068] This optional implementation allows for adjustment of the electric oil pump's rotational speed to control the output oil volume, thereby enabling more precise adjustment of the oil supply based on the electric oil pump's rotational speed.

[0069] In the above optional embodiments, the first preset threshold can be 60 degrees Celsius. This will not be elaborated further in the embodiments of this application.

[0070] In an optional embodiment, the rotational speed of the electric oil pump is determined based on the temperature of the electric drive, which can be the temperature of the motor. For example, when the motor temperature is 60 degrees Celsius, the rotational speed of the electric oil pump is 2000 revolutions per minute, while when the motor temperature is 70 degrees Celsius, the rotational speed of the electric oil pump can be 3000 revolutions per minute. Thus, this optional embodiment can determine the rotational speed of the electric oil pump based on the temperature of the electric drive.

[0071] It should be noted that the rotational speed of the electric oil pump can be correlated with other variables, allowing it to be set based on these variables. This enables the control of the electric oil pump's rotational speed by taking into account more factors, thereby more precisely controlling the amount of lubricating oil output.

[0072] Example 3

[0073] This application provides a terminal device for performing a cooling and lubrication method as described in any of the foregoing embodiments.

[0074] The terminal device in this embodiment of the application can switch between three operating modes through a three-way proportional valve. In cooling mode, the amount of lubricating oil required for cooling can be controlled independently, while in lubrication mode, the amount of lubricating oil required for lubrication can be controlled independently. This decouples the lubricating oil amounts required for cooling and lubrication, ensuring that the control of the lubricating oil amount for cooling is unaffected by the lubricating oil amount, and vice versa. This ultimately improves oil control accuracy, thereby reducing energy consumption and increasing oil and energy efficiency. Simultaneously, the proportional mixing mode also accommodates scenarios requiring simultaneous cooling and lubrication. In such scenarios, adjusting the opening ratio of the three-way proportional valve and the electric oil pump allows for precise control of the oil amount according to demand, further reducing energy consumption. Furthermore, the three-way proportional valve and electric oil pump enhance the adjustment range and flexibility of the oil amount.

[0075] Example 4

[0076] This application provides a vehicle, which includes a cooling and lubrication system as described in any of the foregoing embodiments and a terminal device as described in the foregoing embodiments.

[0077] The vehicle in this embodiment of the application can switch between three operating modes via a three-way proportional valve. In cooling mode, the amount of lubricating oil required for cooling can be controlled independently, while in lubrication mode, the amount of lubricating oil required for lubrication can be controlled independently. This decouples the lubricating oil required for cooling from the lubricating oil required for lubrication, thus the control of the lubricating oil required for cooling is unaffected by the lubricating oil required, and vice versa. This ultimately improves the accuracy of oil control, thereby reducing energy consumption and increasing oil and energy efficiency. Simultaneously, the proportional mixing mode also accommodates scenarios requiring simultaneous cooling and lubrication. In such scenarios, by adjusting the opening ratio of the three-way proportional valve and the electric oil pump, the oil quantity can be precisely controlled according to demand, further reducing energy consumption. Furthermore, the three-way proportional valve and electric oil pump enhance the adjustment range and flexibility of the oil quantity.

[0078] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0079] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0081] It should be noted that if the function is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0082] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0083] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A cooling and lubrication system, wherein, The cooling and lubrication system includes an electric oil pump, a heat exchanger, and a three-way proportional valve; The electric oil pump is connected to the heat exchanger through a pipeline. The electric oil pump is used to deliver lubricating oil to the heat exchanger, and the heat exchanger is used to cool or heat the lubricating oil. The three-way proportional valve is connected to the heat exchanger via a pipeline, and is also connected to the lubrication circuit and the cooling circuit. The three-way proportional valve is used to distribute the oil quantity in the lubrication circuit and the oil quantity in the cooling circuit to form three operating modes: cooling mode, lubrication mode, and proportional mixing mode. The cooling mode is characterized by the lubrication circuit being closed and the cooling circuit being open. The lubrication mode is characterized by the lubrication circuit being open and the cooling circuit being closed. The proportional mixing mode is that the lubrication circuit and the cooling circuit are opened simultaneously, and the opening ratio of the three-way proportional valve meets the preset conditions. Furthermore, the cooling and lubrication system further includes a first nozzle, which is connected to the cooling circuit and is used to spray the lubricating oil onto the electric drive and transmission system to cool the electric drive and transmission system. Furthermore, the cooling and lubrication system further includes a second nozzle, which is connected to the lubrication circuit and is used to spray the lubricating oil onto the electric drive and the transmission system to lubricate them.

2. The cooling and lubrication system as described in claim 1, characterized in that, The cooling and lubrication system also includes a filter, which is connected to the electric oil pump and is used to filter the lubricating oil.

3. The cooling and lubrication system as described in claim 2, characterized in that, The cooling and lubrication system further includes an oil storage chamber, which is connected to the filter and is used to store and recover the lubricating oil.

4. A cooling and lubrication method, characterized in that, The method is applied to the cooling and lubrication system as described in any one of claims 1-3, the method comprising: Acquire the status of the electric drive and the transmission system; When the state of the transmission system indicates that the transmission system has stopped operating, and the state of the electric drive indicates that the temperature of the electric drive is greater than or equal to a first preset threshold, the three-way proportional valve is controlled to close the lubrication circuit and open the cooling circuit. When the state of the transmission system indicates that the transmission system is operating, and the state of the electric drive indicates that the temperature of the electric drive is less than a second preset threshold, the three-way proportional valve is controlled to open the lubrication circuit and close the cooling circuit. When the state of the transmission system indicates that the transmission system is operating, based on the state of the transmission system and the state of the electric drive, the three-way proportional valve is controlled so that the lubrication circuit and the cooling circuit are opened simultaneously, and the opening ratio of the three-way proportional valve meets the preset conditions.

5. The method as described in claim 4, characterized in that, The method further includes: When the state of the transmission system indicates that the transmission system has stopped operating, and the state of the electric drive indicates that the temperature of the electric drive is greater than or equal to a first preset threshold, the speed of the electric oil pump is adjusted to adjust the output oil volume of the electric oil pump.

6. The method as described in claim 5, characterized in that, The rotational speed of the electric oil pump is determined based on the temperature of the electric drive.

7. A terminal device, characterized in that, The terminal device is used to perform the cooling and lubrication method as described in any one of claims 4-6.

8. A vehicle, characterized in that, The vehicle includes the cooling and lubrication system as described in any one of claims 1-3 and the terminal equipment as described in claim 7.

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