A control method and device for optimizing vehicle driving efficiency

Abstract

This application provides a control method and apparatus for optimizing vehicle drive efficiency. The method includes: acquiring the preset temperature of the lubricating oil in the reducer and the preset temperature of the coolant in the motor controller; acquiring the actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller; calculating the required heat of the lubricating oil in the reducer based on real-time vehicle data, the preset temperature of the lubricating oil, and the actual temperature of the lubricating oil; determining whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil; if so, determining whether the actual temperature of the lubricating oil is higher than the actual temperature of the coolant; if so, controlling the cooling circuit switching module to disconnect the heat exchange module, and adjusting the operating speed of the oil pump based on the required heat of the lubricating oil, so that the motor and reducer heat the lubricating oil of the reducer based on heat loss. Therefore, this method and apparatus can accurately control the lubricating oil temperature of the reducer, thereby effectively improving the efficiency of the vehicle drive system.

Description

Technical Field

[0001] This application relates to the field of vehicle electric drive technology, and more specifically, to a control method and apparatus for optimizing vehicle drive efficiency. Background Technology

[0002] Currently, the main method for controlling the lubricating oil temperature of a speed reducer involves placing a switching valve between the motor controller cooling system and the oil cooling system of the motor or speed reducer. When the speed reducer oil temperature is low, the switching valve opens the passage connecting to the speed reducer, allowing the motor controller coolant to flow through the speed reducer and heat the lubricating oil. However, in practice, it has been found that this control method cannot accurately control the oil temperature, resulting in very limited improvement in the efficiency of the vehicle drive system. Summary of the Invention

[0003] The purpose of this application is to provide a control method and device for optimizing vehicle drive efficiency, which can accurately control the lubricating oil temperature of the reducer, thereby effectively improving the efficiency of the vehicle drive system.

[0004] The first aspect of this application provides a control method for optimizing vehicle drive efficiency, including:

[0005] Obtain the preset temperature of the lubricating oil in the reducer and the preset temperature of the coolant in the motor controller;

[0006] The actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller are obtained.

[0007] The required heat of the reducer's lubricating oil is calculated based on real-time vehicle data, the preset temperature of the lubricating oil, and the actual temperature of the lubricating oil.

[0008] Determine whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil;

[0009] If so, determine whether the actual temperature of the lubricating oil is greater than the actual temperature of the coolant;

[0010] If so, the cooling circuit switching module is disconnected from the heat exchange module, and the operating speed of the oil pump is adjusted based on the heat demand of the lubricating oil, so that the motor and the reducer heat the lubricating oil of the reducer based on heat loss.

[0011] Furthermore, the method also includes:

[0012] When the actual temperature of the lubricating oil is not greater than the actual temperature of the coolant, the cooling circuit switching module is connected to the heat exchange module.

[0013] Control the oil pump to run at its initial speed, and control the water pump to run at its initial speed.

[0014] The effective heat exchange area percentage of the heat exchange module, the operating speed of the oil pump, and the operating speed of the water pump are adjusted based on the heat demand of the lubricating oil, so that the motor, the reducer, and the motor controller heat the lubricating oil of the reducer based on heat loss.

[0015] Furthermore, the method also includes:

[0016] When the actual temperature of the lubricating oil is not less than the preset temperature of the lubricating oil, the cooling circuit switching module is connected to the heat exchange module.

[0017] Extract the actual heating power of the motor controller, the actual heating power of the motor, and the actual heating power of the reducer from the real-time vehicle data;

[0018] The system heat dissipation power is calculated based on the actual heating power of the motor controller, the actual heating power of the motor, the actual heating power of the reducer, and the heat demand of the lubricating oil.

[0019] Determine whether the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than a preset difference threshold;

[0020] If not, control the oil pump to run at its initial speed and control the water pump to run at its initial speed.

[0021] The target heat exchange area percentage of the heat exchange module is calculated based on the required heat of the lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the thickness of the medium between the lubricating oil and the coolant, the temperature difference between the actual temperature of the lubricating oil and the actual temperature of the coolant, and the thermal conductivity between the actual temperature of the lubricating oil and the actual temperature of the coolant.

[0022] Adjust the effective heat exchange area percentage of the heat exchange module to the target heat exchange area percentage;

[0023] Control the heat dissipation module to operate according to the system's heat dissipation power.

[0024] Furthermore, the method also includes:

[0025] When the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than the preset difference threshold, the percentage of the effective heat exchange area of ​​the heat exchange module is adjusted to the maximum.

[0026] Control the oil pump to run at the preset oil pump speed, and control the water pump to run at the preset water pump speed;

[0027] The water pump speed adjustment percentage and oil pump speed adjustment percentage are calculated based on the required heat of the lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the medium thickness between the lubricating oil and the coolant, the temperature difference between the actual temperature of the lubricating oil and the actual temperature of the coolant, the thermal conductivity λ between the actual temperature of the lubricating oil and the actual temperature of the coolant, the maximum heat exchange area of ​​the heat exchange module, the minimum operating speed adjustment percentage of the water pump, and the minimum operating speed adjustment percentage of the oil pump.

[0028] The oil pump is adjusted based on the oil pump speed adjustment percentage, and the water pump is adjusted based on the water pump speed adjustment percentage;

[0029] Control the heat dissipation module to operate according to the system's heat dissipation power.

[0030] Furthermore, obtaining the preset temperature of the lubricating oil in the reducer and the preset temperature of the coolant in the motor controller includes:

[0031] Obtain the vehicle's operating mode and the preset coolant temperature of the motor controller;

[0032] The preset temperature of the lubricating oil in the reducer is determined based on the operating mode.

[0033] A second aspect of this application provides a control device for optimizing vehicle driving efficiency, the control device for optimizing vehicle driving efficiency comprising:

[0034] The control device for optimizing vehicle driving efficiency includes:

[0035] The acquisition unit is used to acquire the preset temperature of the lubricating oil of the reducer and the preset temperature of the coolant of the motor controller;

[0036] The acquisition unit is also used to acquire the actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller;

[0037] The first calculation unit is used to calculate the heat demand of the reducer's lubricating oil based on real-time vehicle data, the preset temperature of the lubricating oil, and the actual temperature of the lubricating oil.

[0038] The first judgment unit is used to determine whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil.

[0039] The second judgment unit is used to determine whether the actual temperature of the lubricating oil is greater than the actual temperature of the coolant when the actual temperature of the lubricating oil is less than the preset temperature of the lubricating oil.

[0040] The control unit is used to control the cooling circuit switching module to disconnect the heat exchange module when the actual temperature of the lubricating oil is greater than the actual temperature of the coolant, and to adjust the operating speed of the oil pump based on the heat demand of the lubricating oil, so that the motor and the reducer heat the lubricating oil of the reducer based on heat loss.

[0041] Furthermore, the control device for optimizing vehicle driving efficiency also includes:

[0042] The control unit is also used to control the cooling circuit switching module to connect to the heat exchange module when the actual temperature of the lubricating oil is not greater than the actual temperature of the coolant.

[0043] The control unit is also used to control the oil pump to run at the initial oil pump speed and to control the water pump to run at the initial water pump speed.

[0044] The regulating unit is used to adjust the percentage of the effective heat exchange area of ​​the heat exchange module, the operating speed of the oil pump, and the operating speed of the water pump based on the heat demand of the lubricating oil, so that the motor, the reducer, and the motor controller heat the lubricating oil of the reducer based on heat loss.

[0045] Furthermore, the control device for optimizing vehicle driving efficiency also includes:

[0046] The control unit is also used to control the cooling circuit switching module to connect to the heat exchange module when the actual temperature of the lubricating oil is not less than the preset temperature of the lubricating oil.

[0047] The extraction unit is used to extract the actual heating power of the motor controller, the actual heating power of the motor, and the actual heating power of the reducer from the real-time vehicle data.

[0048] The second calculation unit is used to calculate the system heat dissipation power based on the actual heating power of the motor controller, the actual heating power of the motor, the actual heating power of the reducer, and the heat demand of the lubricating oil.

[0049] The third judgment unit is used to determine whether the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than a preset difference threshold.

[0050] The control unit is also used to control the oil pump to run at the initial oil pump speed and the water pump to run at the initial water pump speed when the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is not greater than the preset difference threshold.

[0051] The third calculation unit is used to calculate the target heat exchange area percentage of the heat exchange module based on the heat demand of the lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the thickness of the medium between the lubricating oil and the coolant, the temperature difference between the actual temperature of the lubricating oil and the actual temperature of the coolant, and the thermal conductivity between the actual temperature of the lubricating oil and the actual temperature of the coolant.

[0052] The adjustment unit is also used to adjust the effective heat exchange area percentage of the heat exchange module to the target heat exchange area percentage.

[0053] The control unit is also used to control the heat dissipation module to operate according to the system's heat dissipation power.

[0054] Furthermore, the control device for optimizing vehicle driving efficiency also includes:

[0055] The adjustment unit is also used to adjust the percentage of the effective heat exchange area of ​​the heat exchange module to the maximum when the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than a preset difference threshold.

[0056] The control unit is also used to control the oil pump to run at a preset oil pump speed and to control the water pump to run at a preset water pump speed.

[0057] The fourth calculation unit is used to calculate the water pump speed adjustment percentage and oil pump speed adjustment percentage based on the required heat of the lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the medium thickness between the lubricating oil and the coolant, the temperature difference between the actual temperature of the lubricating oil and the actual temperature of the coolant, the thermal conductivity λ between the actual temperature of the lubricating oil and the actual temperature of the coolant, the maximum heat exchange area of ​​the heat exchange module, the minimum operating speed adjustment percentage of the water pump, and the minimum operating speed adjustment percentage of the oil pump.

[0058] The adjustment unit is also used to adjust the oil pump based on the oil pump speed adjustment percentage and to adjust the water pump based on the water pump speed adjustment percentage.

[0059] The control unit is also used to control the heat dissipation module to operate according to the system's heat dissipation power.

[0060] Furthermore, the acquisition unit includes:

[0061] The acquisition subunit is used to acquire the vehicle's operating mode and the preset coolant temperature of the motor controller;

[0062] A determination subunit is used to determine the preset temperature of the lubricating oil in the reducer based on the operating mode.

[0063] A third aspect of this application provides an electronic device including a memory and a processor, the memory storing a computer program, and the processor running the computer program to cause the electronic device to perform the vehicle drive efficiency optimization control method described in any one of the first aspects of this application.

[0064] The fourth aspect of this application provides a computer-readable storage medium storing computer program instructions, which, when read and executed by a processor, perform the vehicle drive efficiency optimization control method described in any one of the first aspects of this application.

[0065] The beneficial effects of this application are: the method and device can accurately control the lubricating oil temperature of the reducer, thereby effectively improving the efficiency of the vehicle drive system. Attached Figure Description

[0066] 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.

[0067] Figure 1 A flowchart illustrating a control method for optimizing vehicle drive efficiency provided in an embodiment of this application;

[0068] Figure 2 A flowchart illustrating another vehicle drive efficiency optimization control method provided in this application embodiment;

[0069] Figure 3 A schematic diagram of a control device for optimizing vehicle drive efficiency provided in an embodiment of this application;

[0070] Figure 4 A schematic diagram of another vehicle drive efficiency optimization control device provided in this application embodiment;

[0071] Figure 5 A schematic diagram of the framework of an electric vehicle drive system using a control method for optimizing vehicle drive efficiency, provided in an embodiment of this application;

[0072] Figure 6 A flowchart illustrating an application example of an electric vehicle drive system provided in this application embodiment;

[0073] Figure 7 This is a diagram illustrating the working architecture of an electric vehicle drive system in situations where coolant heating is not possible, as provided in this application embodiment. Detailed Implementation

[0074] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0075] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0076] Example 1

[0077] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating a control method for optimizing vehicle drive efficiency provided in this embodiment. The control method for optimizing vehicle drive efficiency includes:

[0078] S101. Obtain the preset temperature of the lubricating oil of the reducer and the preset temperature of the coolant of the motor controller.

[0079] In this embodiment, the method can preset the coolant temperature of the motor controller to T. w0 (The preset temperature can be a specific value or a temperature range.)

[0080] As an optional implementation, obtaining the preset temperature of the lubricating oil in the reducer and the preset temperature of the coolant in the motor controller includes:

[0081] Obtain the vehicle's operating mode and the preset coolant temperature of the motor controller;

[0082] The preset temperature of the lubricating oil in the reducer is determined based on the operating mode.

[0083] In this embodiment, the method can obtain the vehicle's operating mode to determine the vehicle's current operating mode (such as the vehicle's sport mode, economy mode, etc.).

[0084] In this embodiment, different operating modes correspond to different preset temperatures of the lubricating oil in the reducer and the coolant in the motor controller.

[0085] For example, when the vehicle is in Sport mode, the preset lubricating oil temperature is set to T0; when the vehicle is in Eco mode (corresponding to non-Sport mode), the preset lubricating oil temperature is set to T1. The preset temperature can be a specific value or a temperature range, and T0 < T1.

[0086] S102. Obtain the actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller.

[0087] In this embodiment, the method can obtain the actual temperature T of the lubricating oil in the reducer and the actual temperature T of the coolant in the motor controller. w .

[0088] As an optional implementation, after step S102, the method further includes:

[0089] Determine the actual temperature T of the coolant in the motor controller. w Is it greater than the preset temperature of the coolant in the motor controller (i.e., T)? w >T w0 If so, then according to (T) w -T w0 Adjust the power of the heat dissipation module and the speed of the cooling water pump by adjusting the value (T). w -T w0 If the value is large, further increase the cooling water pump speed and the power of the heat dissipation module; otherwise (i.e., T... w <T w0 If the coolant temperature is not particularly high, then the subsequent steps can be performed.

[0090] S103. Calculate the required heat of the reducer's lubricating oil based on real-time vehicle data, preset lubricating oil temperature, and actual lubricating oil temperature.

[0091] In this embodiment, the real-time vehicle data includes the vehicle accelerator pedal signal and the vehicle power performance dataset. This method can combine data on vehicle operating mode, drive system energy loss, power performance dataset, motor and reducer system efficiency, oil temperature-related dataset, motor controller coolant temperature, and component temperature rise-related dataset for estimation and judgment in subsequent steps.

[0092] In this embodiment, the method can determine the vehicle's driving condition based on the collected information such as the actual output power, torque, and speed of the drive system. Furthermore, it obtains the heating power P of the motor and reducer system based on a dataset of energy losses in the drive system (which can be obtained through experimental calibration or based on an energy loss estimation model). m Motor controller heating power P c The effective heat exchange area D is obtained through the heat exchange module.

[0093] Specifically, this method can estimate the heat requirement of the reducer lubricating oil based on the actual temperature T of the reducer lubricating oil, the preset temperature T0 of the reducer lubricating oil, the specific heat capacity C of the reducer lubricating oil, the oil volume L (oil capacity) of the reducer lubricating oil, and the density ρ of the reducer lubricating oil.

[0094] Q r = C× T×L×ρ;

[0095] in, T = T - T0.

[0096] S104. Determine whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil. If yes, proceed to step S105; otherwise, end the process.

[0097] In this embodiment, when the actual temperature of the reducer lubricating oil is lower than the preset temperature of the reducer lubricating oil (i.e., T is less than T0), it is determined that the lubricating oil needs to be heated.

[0098] In this embodiment, when it is determined that the lubricating oil needs to be heated, the following steps are required to determine the heat source (motor, reducer, motor controller coolant) that can be used to heat the lubricating oil.

[0099] S105. Determine whether the actual temperature of the lubricating oil is greater than the actual temperature of the coolant. If yes, proceed to step S106; otherwise, proceed to steps S107-S109.

[0100] S106. The control cooling circuit switching module is disconnected from the heat exchange module, and the operating speed of the oil pump is adjusted based on the heat demand of the lubricating oil, so that the motor and reducer heat the lubricating oil of the reducer based on heat loss, and the process ends.

[0101] In this embodiment, when the actual temperature of the lubricating oil in the reducer is greater than the actual temperature of the coolant in the motor controller (the coolant can be water, and this temperature can be the water temperature), i.e., T > T w At this time, the motor controller coolant cannot heat the lubricating oil. Therefore, it is determined that the heat for heating the lubricating oil comes from the heat loss of the motor and reducer.

[0102] In this embodiment, the method can control the disconnection of the cooling circuit switching module and the heat exchange module, and control the operation of the oil pump. The reducer lubricating oil temperature is heated by the heat lost from the motor and reducer.

[0103] Specifically, let Q0 be the threshold for judging the heating heat demand of lubricating oil. When 0 < Q r When Q < Q0, this method can control the oil pump to linearly adjust the lubricating oil flow rate within the range of [initial speed, maximum allowable speed].

[0104] S107, Control the cooling circuit switching module to connect to the heat exchange module.

[0105] In this embodiment, when the actual temperature of the lubricating oil in the reducer is less than the actual temperature of the coolant in the motor controller (i.e., T < T), w When the cooling circuit switching module and the heat exchange module are connected, the method can control the water pump, oil pump, and heat exchange module to operate. At this time, the heat dissipation module is not operated.

[0106] In this embodiment, the power loss of the current motor controller can be estimated. Specifically, this method can be based on the power loss (heating power of the motor controller) P. c Obtain the energy loss power (heating power of the motor and reducer system) P generated by the motor and reducer system. m Obtain the effective heat exchange area percentage D of the heat exchange module. Among these, estimate the heating power P of the motor controller system for the lubricating oil. c ×D, the total heating power of the entire drive system for the reducer oil temperature is: P c ×D+P m .

[0107] S108. Control the oil pump to run at its initial speed and control the water pump to run at its initial speed.

[0108] In this embodiment, the method can control the oil pump to operate at an initial speed (<50% of the maximum speed), and adjust the heating amount Q of the lubricating oil accordingly. r Further adjust the rotation speed.

[0109] In this embodiment, the water pump is controlled to operate at its initial speed (<50% of maximum speed), and the heating amount Q required by the lubricating oil is determined. r Further adjust the rotation speed.

[0110] S109. Adjust the effective heat exchange area percentage of the heat exchange module, the operating speed of the oil pump, and the operating speed of the water pump based on the heat demand of the lubricating oil, so that the motor, reducer, and motor controller heat the lubricating oil of the reducer based on heat loss.

[0111] In this embodiment, the heating power of the lubricating oil can be adjusted by regulating the effective percentage D of the heat exchange area of ​​the heat exchange system. The value of D is determined based on the required heating amount Q of the lubricating oil in the reducer. r To adjust, Q r The larger the value, the larger the D value.

[0112] Specifically, for D-value adjustment, a threshold Q1 can be set to determine the required heating amount of the lubricating oil. When Q... r When Q = [0, Q1], the control value of D is linearly adjusted in the interval [0, 100%]. r When the value is greater than Q1, adjust the D value to 100%.

[0113] For adjusting the speed of the oil pump and water pump, a threshold Q2 can be set to determine the required heating amount of the lubricating oil. r When Q = [0, Q2], the oil pump speed and water pump speed are linearly adjusted within the range of [initial speed, maximum allowable speed]. rWhen the speed is greater than Q2, adjust the speed to the maximum allowable speed.

[0114] By implementing this method, energy loss generated during the operation of the drive system can be recovered and used to heat the lubricating oil in the drive system, thereby achieving energy saving and environmental protection.

[0115] In this embodiment, the subject executing the method can be a computing device such as a computer or server, and no limitation is made in this embodiment.

[0116] In this embodiment, the subject executing the method can also be a smart device such as a smartphone or tablet, and no limitation is made in this embodiment.

[0117] As can be seen, the vehicle drive efficiency optimization control method described in this embodiment can estimate and predict the vehicle's driving conditions and the power output of the drive system. By combining the data sets related to the energy loss and power output of the drive system, the data sets related to the efficiency of the motor and reducer system and the oil temperature, and the data sets related to the temperature and efficiency of the motor controller coolant, the preset temperatures of the drive system lubricating oil and the motor controller coolant that have a better effect on optimizing the drive system efficiency can be obtained. Then, based on this information, the energy lost by the drive system can be recovered and used to control the temperature of the drive system lubricating oil and the temperature of the motor controller coolant, thereby increasing the temperature of the drive system lubricating oil, reducing its churning resistance, and thus optimizing the efficiency of the drive system.

[0118] Example 2

[0119] Please refer to Figure 2 , Figure 2 This is a flowchart illustrating a control method for optimizing vehicle drive efficiency provided in this embodiment. The control method for optimizing vehicle drive efficiency includes:

[0120] S201. Obtain the preset temperature of the lubricating oil of the reducer and the preset temperature of the coolant of the motor controller.

[0121] As an optional implementation, obtaining the preset temperature of the lubricating oil in the reducer and the preset temperature of the coolant in the motor controller includes:

[0122] Obtain the vehicle's operating mode and the preset coolant temperature of the motor controller;

[0123] The preset temperature of the lubricating oil in the reducer is determined based on the operating mode.

[0124] S202. Obtain the actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller.

[0125] S203. Calculate the required heat of the reducer's lubricating oil based on real-time vehicle data, preset lubricating oil temperature, and actual lubricating oil temperature.

[0126] In this embodiment, heat from the motor and reducer cooling systems is transferred to the motor controller cooling circuit via a heat exchange module, and the cooling circuit is cooled by a heat dissipation module. The required heat reduction of the reducer lubricating oil (i.e., the required heat of the lubricating oil) is Q. r for:

[0127] Q r =C× T×L×ρ;

[0128] The actual temperature of the reducer lubricating oil is T;

[0129] The preset temperature of the reducer lubricating oil is T0;

[0130] T = T - T0;

[0131] The specific heat capacity of the lubricating oil in the speed reducer is C;

[0132] The lubricating oil volume (oil capacity) of the reducer is L;

[0133] The density of the gearbox lubricating oil is ρ.

[0134] S204. Determine whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil. If yes, end this process; otherwise, proceed to steps S205~S208.

[0135] In this embodiment, when the actual temperature of the lubricating oil is not less than the preset temperature of the lubricating oil (i.e., T>T0), it is determined that the lubricating oil of the reducer needs to dissipate heat. Unlike Embodiment 1, Embodiment 2 provides another branch of this method. It should be understood that Embodiment 1 and Embodiment 2 can be implemented in parallel, and they do not conflict with each other.

[0136] For example, this application may add the corresponding steps in Embodiment 1 after the "yes" branch of step S204; or add the corresponding steps in Embodiment 2 after the "no" branch of step S104.

[0137] S205, Control the cooling circuit switching module to connect to the heat exchange module.

[0138] In this embodiment, when the reducer lubricating oil needs to dissipate heat, the channel between the cooling circuit switching module and the heat exchange module is connected.

[0139] S206. Extract the actual heating power of the motor controller, the actual heating power of the motor, and the actual heating power of the reducer from the real-time data of the vehicle.

[0140] In this embodiment, the actual heating power of the motor controller is P. c The actual heating power of the motor and the actual heating power of the reducer are P. m .

[0141] S207. The system heat dissipation power is calculated based on the actual heating power of the motor controller, the actual heating power of the motor, the actual heating power of the reducer, and the heat demand of the lubricating oil.

[0142] In this embodiment, the heat that the drive system needs to dissipate (i.e., the system's heat dissipation power) is:

[0143] P e =P m +Q r +P c .

[0144] S208. Determine whether the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than the preset difference threshold. If yes, proceed to steps S213~S217; otherwise, proceed to steps S209~S212.

[0145] In this embodiment, if the (T-T0) value is small, such as not exceeding the preset difference threshold, it is determined that the reducer lubricating oil is slightly overheated; conversely, if the (T-T0) value is large, such as exceeding the preset difference threshold, it is determined that the reducer lubricating oil is severely overheated.

[0146] S209. Control the oil pump to run at its initial speed and control the water pump to run at its initial speed.

[0147] In this embodiment, the method can control the oil pump to operate at a low speed (<50% of the maximum speed, i.e., the initial speed of the oil pump); and control the water pump to operate at a low speed (<50% of the maximum speed, i.e., the initial speed of the water pump).

[0148] S210. Based on the heat demand of lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the thickness of the medium between lubricating oil and coolant, the temperature difference between the actual temperature of lubricating oil and the actual temperature of coolant, and the thermal conductivity between the actual temperature of lubricating oil and the actual temperature of coolant, the target heat exchange area percentage of the heat exchange module is calculated.

[0149] In this embodiment, the effective heat exchange area of ​​the heat exchange module can be adjusted using the heat conduction formula Q= T0×λ×S / L calculates the effective heat exchange area of ​​the heat exchange module:

[0150] S = (Q) r +P m )×L / ( T0×λ)

[0151] Where L is the thickness of the medium between the oil and the coolant, λ is the thermal conductivity between them, and S is the heat transfer area. T0 is the temperature difference between the oil and the coolant.

[0152] S211. Adjust the effective heat exchange area percentage of the heat exchange module to the target heat exchange area percentage.

[0153] S212. Control the heat dissipation module to operate according to the system's heat dissipation power, and end this process.

[0154] In this embodiment, the initial heat dissipation power of the heat dissipation module is P. s Among them, P s Related to the design parameters of the heat dissipation module itself, the heat dissipation power can be adjusted by adjusting the heat dissipation module.

[0155] In this embodiment, the method can control the operation of the heat dissipation module and adjust its operating power to P. e When P e When the power exceeds the maximum allowable power of the heat dissipation module, control the heat dissipation module to operate at the maximum allowable power.

[0156] S213. Adjust the percentage of effective heat exchange area of ​​the heat exchange module to the maximum.

[0157] In this embodiment, the method can first adjust the effective heat exchange area of ​​the heat exchange module to the maximum.

[0158] S214. Control the oil pump to run at the preset oil pump speed, and control the water pump to run at the preset water pump speed.

[0159] In this embodiment, the oil pump is controlled to operate at a higher initial speed (≥50% of the maximum speed).

[0160] In this embodiment, the water pump is controlled to operate at a higher initial speed (≥50% of the maximum speed).

[0161] S215. Based on the required heat of lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the medium thickness between lubricating oil and coolant, the temperature difference between the actual temperature of lubricating oil and coolant, the thermal conductivity λ between the actual temperature of lubricating oil and coolant, the maximum heat exchange area of ​​the heat exchange module, the minimum operating speed adjustment percentage of the water pump, and the minimum operating speed adjustment percentage of the oil pump, the water pump speed adjustment percentage and the oil pump speed adjustment percentage are calculated.

[0162] In this embodiment, the formula for calculating the percentage adjustment of the oil pump speed is:

[0163] ;

[0164] Where D0 is the minimum operating speed adjustment percentage set by the specifications of the reference oil pump.

[0165] In this embodiment, the formula for calculating the percentage adjustment of the water pump speed is:

[0166]

[0167] Where D0 is the minimum operating speed adjustment percentage set according to the specifications of the reference water pump.

[0168] S216. Adjust the oil pump based on the percentage of oil pump speed adjustment, and adjust the water pump based on the percentage of water pump speed adjustment.

[0169] S217. Control the heat dissipation module to operate according to the system's heat dissipation power.

[0170] In this embodiment, the subject executing the method can be a computing device such as a computer or server, and no limitation is made in this embodiment.

[0171] In this embodiment, the subject executing the method can also be a smart device such as a smartphone or tablet, and no limitation is made in this embodiment.

[0172] As can be seen, the vehicle drive efficiency optimization control method described in this embodiment can estimate and predict the vehicle's driving conditions and the power output of the drive system. By combining the data sets related to the energy loss and power output of the drive system, the data sets related to the efficiency of the motor and reducer system and the oil temperature, and the data sets related to the temperature and efficiency of the motor controller coolant, the preset temperatures of the drive system lubricating oil and the motor controller coolant that have a better effect on optimizing the drive system efficiency can be obtained. Then, based on this information, the energy lost by the drive system can be recovered and used to control the temperature of the drive system lubricating oil and the temperature of the motor controller coolant, thereby increasing the temperature of the drive system lubricating oil, reducing its churning resistance, and thus optimizing the efficiency of the drive system.

[0173] Example 3

[0174] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a control device for optimizing vehicle drive efficiency provided in this embodiment. Figure 3 As shown, the control device for optimizing vehicle drive efficiency includes:

[0175] The acquisition unit 310 is used to acquire the preset temperature of the lubricating oil of the reducer and the preset temperature of the coolant of the motor controller;

[0176] The acquisition unit 320 is also used to acquire the actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller;

[0177] The first calculation unit 330 is used to calculate the heat demand of the reducer's lubricating oil based on real-time vehicle data, preset lubricating oil temperature and actual lubricating oil temperature.

[0178] The first judgment unit 340 is used to determine whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil.

[0179] The second judgment unit 350 is used to determine whether the actual temperature of the lubricating oil is greater than the actual temperature of the coolant when the actual temperature of the lubricating oil is less than the preset temperature of the lubricating oil.

[0180] The control unit 360 is used to control the cooling circuit switching module to disconnect the heat exchange module when the actual temperature of the lubricating oil is greater than the actual temperature of the coolant, and to adjust the operating speed of the oil pump based on the heat demand of the lubricating oil so that the motor and reducer heat the lubricating oil of the reducer based on heat loss.

[0181] As an optional implementation, the control device for optimizing vehicle drive efficiency further includes:

[0182] The control unit 360 is also used to control the cooling circuit switching module to connect to the heat exchange module when the actual temperature of the lubricating oil is not greater than the actual temperature of the coolant.

[0183] The control unit 360 is also used to control the oil pump to run at the initial oil pump speed and to control the water pump to run at the initial water pump speed.

[0184] The regulating unit 370 is used to adjust the percentage of the effective heat exchange area of ​​the heat exchange module, the operating speed of the oil pump and the operating speed of the water pump based on the heat demand of the lubricating oil, so that the motor, reducer and motor controller heat the lubricating oil of the reducer based on heat loss.

[0185] In this embodiment, the explanation of the control device for optimizing vehicle driving efficiency can be referred to the description in Embodiment 1 or Embodiment 2, and will not be repeated here.

[0186] As can be seen, the control device for optimizing vehicle drive efficiency described in this embodiment can estimate and predict the vehicle's driving conditions and the power output of the drive system. By combining the data sets related to the energy loss and power output of the drive system, the data sets related to the efficiency of the motor and reducer system and the oil temperature, and the data sets related to the temperature and efficiency of the motor controller coolant, it can obtain the preset temperatures of the drive system lubricating oil and the motor controller coolant that are more effective in optimizing the drive system efficiency. Then, based on this information, it can recover the energy lost by the drive system and use it to control the temperature of the drive system lubricating oil and the motor controller coolant, thereby increasing the temperature of the drive system lubricating oil, reducing its churning resistance, and thus optimizing the efficiency of the drive system.

[0187] Example 4

[0188] Please refer to Figure 4 , Figure 4 This is a schematic diagram of a control device for optimizing vehicle drive efficiency provided in this embodiment. Figure 4 As shown, the control device for optimizing vehicle drive efficiency includes:

[0189] The acquisition unit 310 is used to acquire the preset temperature of the lubricating oil of the reducer and the preset temperature of the coolant of the motor controller;

[0190] The acquisition unit 320 is also used to acquire the actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller;

[0191] The first calculation unit 330 is used to calculate the heat demand of the reducer's lubricating oil based on real-time vehicle data, preset lubricating oil temperature and actual lubricating oil temperature.

[0192] The first judgment unit 340 is used to determine whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil.

[0193] The second judgment unit 350 is used to determine whether the actual temperature of the lubricating oil is greater than the actual temperature of the coolant when the actual temperature of the lubricating oil is less than the preset temperature of the lubricating oil.

[0194] The control unit 360 is used to control the cooling circuit switching module to disconnect the heat exchange module when the actual temperature of the lubricating oil is greater than the actual temperature of the coolant, and to adjust the operating speed of the oil pump based on the heat demand of the lubricating oil so that the motor and reducer heat the lubricating oil of the reducer based on heat loss.

[0195] As an optional implementation, the control device for optimizing vehicle drive efficiency further includes:

[0196] The control unit 360 is also used to control the cooling circuit switching module to connect to the heat exchange module when the actual temperature of the lubricating oil is not greater than the actual temperature of the coolant.

[0197] The control unit 360 is also used to control the oil pump to run at the initial oil pump speed and to control the water pump to run at the initial water pump speed.

[0198] The regulating unit 370 is used to adjust the percentage of the effective heat exchange area of ​​the heat exchange module, the operating speed of the oil pump and the operating speed of the water pump based on the heat demand of the lubricating oil, so that the motor, reducer and motor controller heat the lubricating oil of the reducer based on heat loss.

[0199] As an optional implementation, the control device for optimizing vehicle drive efficiency further includes:

[0200] The control unit 360 is also used to control the cooling circuit switching module to connect to the heat exchange module when the actual temperature of the lubricating oil is not less than the preset temperature of the lubricating oil.

[0201] Extraction unit 380 is used to extract the actual heating power of the motor controller, the actual heating power of the motor, and the actual heating power of the reducer from the real-time data of the vehicle.

[0202] The second calculation unit 390 is used to calculate the system heat dissipation power based on the actual heating power of the motor controller, the actual heating power of the motor, the actual heating power of the reducer and the heat demand of the lubricating oil.

[0203] The third judgment unit 400 is used to determine whether the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than the preset difference threshold.

[0204] The control unit 360 is also used to control the oil pump to run at the initial speed of the oil pump and the water pump to run at the initial speed of the water pump when the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is not greater than the preset difference threshold.

[0205] The third calculation unit 410 is used to calculate the target heat exchange area percentage of the heat exchange module based on the heat demand of the lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the thickness of the medium between the lubricating oil and the coolant, the temperature difference between the actual temperature of the lubricating oil and the actual temperature of the coolant, and the thermal conductivity between the actual temperature of the lubricating oil and the actual temperature of the coolant.

[0206] The adjustment unit 370 is also used to adjust the effective heat exchange area percentage of the heat exchange module to the target heat exchange area percentage;

[0207] The control unit 360 is also used to control the heat dissipation module to operate according to the system's heat dissipation power.

[0208] As an optional implementation, the control device for optimizing vehicle drive efficiency further includes:

[0209] The adjustment unit 370 is also used to adjust the percentage of the effective heat exchange area of ​​the heat exchange module to the maximum when the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than the preset difference threshold.

[0210] The control unit 360 is also used to control the oil pump to run at the preset oil pump speed and to control the water pump to run at the preset water pump speed.

[0211] The fourth calculation unit 420 is used to calculate the water pump speed adjustment percentage and oil pump speed adjustment percentage based on the lubricating oil heat demand, the actual heating power of the motor, the actual heating power of the reducer, the medium thickness between the lubricating oil and the coolant, the temperature difference between the actual temperature of the lubricating oil and the actual temperature of the coolant, the thermal conductivity λ between the actual temperature of the lubricating oil and the actual temperature of the coolant, the maximum heat exchange area of ​​the heat exchange module, the minimum operating speed adjustment percentage of the water pump and the minimum operating speed adjustment percentage of the oil pump.

[0212] The regulating unit 370 is also used to regulate the oil pump based on the oil pump speed regulation percentage and to regulate the water pump based on the water pump speed regulation percentage.

[0213] The control unit 360 is also used to control the heat dissipation module to operate according to the system's heat dissipation power.

[0214] As an optional implementation, the acquisition unit 310 includes:

[0215] Acquisition subunit 311 is used to acquire the vehicle's operating mode and the preset coolant temperature of the motor controller;

[0216] Subunit 312 is used to determine the preset temperature of the lubricating oil in the reducer based on the operating mode.

[0217] In this embodiment, the explanation of the control device for optimizing vehicle driving efficiency can be referred to the description in Embodiment 1 or Embodiment 2, and will not be repeated here.

[0218] As can be seen, the control device for optimizing vehicle drive efficiency described in this embodiment can estimate and predict the vehicle's driving conditions and the power output of the drive system. By combining the data sets related to the energy loss and power output of the drive system, the data sets related to the efficiency of the motor and reducer system and the oil temperature, and the data sets related to the temperature and efficiency of the motor controller coolant, it can obtain the preset temperatures of the drive system lubricating oil and the motor controller coolant that are more effective in optimizing the drive system efficiency. Then, based on this information, it can recover the energy lost by the drive system and use it to control the temperature of the drive system lubricating oil and the motor controller coolant, thereby increasing the temperature of the drive system lubricating oil, reducing its churning resistance, and thus optimizing the efficiency of the drive system.

[0219] Example 5

[0220] Please refer to Figure 5 , Figure 5 This is a schematic diagram of the framework of an electric vehicle drive system that applies a control method for optimizing vehicle drive efficiency, as provided in this embodiment. Figure 5 As shown, the electric vehicle drive system includes:

[0221] Motor controller 110, control unit 120, oil pump 130, drive motor 140, reducer 150, drive system oil temperature acquisition module 160, heat exchange module 170, heat dissipation module 180, cooling water pump 190, cooling circuit switching module 200, throttle acquisition module 210, vehicle information acquisition module 220, drive system oil temperature acquisition module 230, motor controller cooling medium temperature acquisition module 240, drive system operation estimation module 250.

[0222] Among them, the motor controller 110 is used to realize the drive control of the synchronous motor;

[0223] The control unit 120 is used to control the oil pump 130, the cooling water pump 190, and the solenoid valve.

[0224] Oil pump 130 is used to control the oil flow rate in the oil cooling circuit of motor 140 and reducer 150; wherein, the method can adjust the operating speed of oil pump 130 to control the flow rate of lubricating oil in reducer, thereby realizing the control of heat transfer of lubricating oil by drive system.

[0225] The drive motor 140 is typically a permanent magnet synchronous motor, which provides power input.

[0226] The reducer 150 is used to transmit power and increase torque.

[0227] The oil temperature monitoring module 160 is used to monitor the oil temperature of the drive system.

[0228] The heat exchange module 170 is used to realize the heat exchange between the motor and reducer cooling system and the motor controller cooling system. The heat exchange module is an adjustable module, and the amount of heat exchange between the reducer lubricating oil and the motor controller coolant can be adjusted by adjusting the contact area between the internal heat dissipation mechanism and the cooling medium.

[0229] The heat dissipation module 180 is used to cool the heat of the drive system; wherein, the adjustable heat dissipation module can dissipate and cool the system heat when the temperature of the reducer lubricating oil is too high or the temperature of the drive system components is too high.

[0230] Cooling water pump 190 is used to control the flow rate of the cooling system consisting of motor controller 110, oil cooler, radiator, and solenoid valve; wherein, the method can adjust the operating speed of the water pump to control the flow rate of the coolant in the motor controller, thereby controlling the heat transfer of the lubricating oil by the drive system.

[0231] The cooling circuit switching module 200 is used to realize the connection status between the motor controller cooling circuit and the heat exchange module. This module can control the opening of the connection circuit and also control the on / off state of the connection circuit. Specifically, this module can realize the connection and disconnection of the water cooling circuit and the oil cooling circuit of the drive system, thereby realizing the switching of the heat source for heating the lubricating oil of the reducer.

[0232] Throttle acquisition module 210 is used to acquire vehicle operating information;

[0233] The vehicle information acquisition module 220 is used to acquire information about the vehicle's operating mode. The method can set a preset value for the reducer lubricating oil temperature according to the vehicle's operating mode to prevent overheating of drive system components when the vehicle has a high demand for power.

[0234] The drive system oil temperature acquisition module 230 is used to obtain the temperature of the oil in the motor and reducer oil cooling system (this application takes an oil cooling solution as an example, which can be extended to related solutions).

[0235] The motor controller cooling medium temperature acquisition module 240 is used to acquire the temperature of the motor controller cooling medium.

[0236] The drive system operation estimation module 250 is used to determine the operating status and energy loss of the drive system based on the power, torque, current, voltage and other information of the current drive system obtained by the vehicle information acquisition module.

[0237] Please refer to Figure 6 , Figure 6 A flowchart illustrating an application example of an electric vehicle drive system is shown.

[0238] Please refer to Figure 7 , Figure 7 A diagram illustrating the working architecture of an electric vehicle drive system in situations where coolant heating is not available is shown.

[0239] This implementation method allows for the estimation and prediction of vehicle driving conditions and drive system power output. By combining datasets related to drive system energy loss and power output, motor and reducer system efficiency and oil temperature, and motor controller coolant temperature and efficiency, preset temperatures for the drive system lubricating oil and motor controller coolant that optimize drive system efficiency can be obtained. Using these preset temperatures as the control target, and by monitoring relevant information in real time, adjustments are made to heat exchange modules, cooling circuit switching modules, and heat dissipation modules to quickly respond to temperature regulation needs.

[0240] In this embodiment, the system can take into account the inverse relationship between the temperature and viscosity of the lubricating oil in the drive system (the lower the temperature of the lubricating oil, the higher the viscosity of the oil, the greater the resistance experienced by the drive system, and the greater the energy loss of the drive system), and optimize the efficiency of the drive system by increasing the temperature of the lubricating oil in the drive system; on the other hand, the system can also recover the energy lost during the operation of the drive system for heating the lubricating oil in the drive system.

[0241] As can be seen, implementing the electric vehicle drive system described in this embodiment allows for the determination of preset temperatures for the drive system lubricating oil and motor controller coolant that are optimal for driving system efficiency, based on data related to the vehicle's driving conditions and the drive system's power output, as well as datasets related to the energy loss and power output of the drive system, the efficiency of the motor and reducer system, and the coolant temperature of the motor controller, through which preset temperatures for the drive system lubricating oil and motor controller coolant can be obtained, thus improving the efficiency of the drive system. Then, based on the information obtained above, the energy lost by the drive system is recovered and used to control the temperature of the reducer lubricating oil and the motor controller coolant, thereby increasing the lubricating oil temperature of the drive system, reducing its churning resistance, and ultimately optimizing the efficiency of the drive system.

[0242] This application provides an electronic device, including a memory and a processor. The memory stores a computer program, and the processor runs the computer program to enable the electronic device to perform the vehicle drive efficiency optimization control method in embodiment 1 or embodiment 2 of this application.

[0243] This application provides a computer-readable storage medium storing computer program instructions. When these computer program instructions are read and executed by a processor, they perform the vehicle drive efficiency optimization control method described in embodiment 1 or embodiment 2 of this application.

[0244] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0245] In addition, 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.

[0246] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they 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 a portion 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, server, or 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.

[0247] 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. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0248] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0249] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A control method of vehicle drive efficiency optimization, characterized by, include: Obtain the preset temperature of the lubricating oil in the reducer and the preset temperature of the coolant in the motor controller; The actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller are obtained. The required heat of the reducer's lubricating oil is calculated based on real-time vehicle data, the preset temperature of the lubricating oil, and the actual temperature of the lubricating oil. Determine whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil; If so, determine whether the actual temperature of the lubricating oil is greater than the actual temperature of the coolant; If so, the cooling circuit switching module is disconnected from the heat exchange module, and the operating speed of the oil pump is adjusted based on the heat demand of the lubricating oil, so that the motor and the reducer heat the lubricating oil of the reducer based on heat loss; The method further includes: When the actual temperature of the lubricating oil is not greater than the actual temperature of the coolant, the cooling circuit switching module is connected to the heat exchange module. Control the oil pump to run at its initial speed, and control the water pump to run at its initial speed. The effective heat exchange area percentage of the heat exchange module, the operating speed of the oil pump, and the operating speed of the water pump are adjusted based on the heat demand of the lubricating oil, so that the motor, the reducer, and the motor controller heat the lubricating oil of the reducer based on heat loss.

2. The control method of vehicle drive efficiency optimization according to claim 1, characterized by, The method further includes: When the actual temperature of the lubricating oil is not less than the preset temperature of the lubricating oil, the cooling circuit switching module is connected to the heat exchange module. Extract the actual heating power of the motor controller, the actual heating power of the motor, and the actual heating power of the reducer from the real-time vehicle data; The system heat dissipation power is calculated based on the actual heating power of the motor controller, the actual heating power of the motor, the actual heating power of the reducer, and the heat demand of the lubricating oil. Determine whether the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than a preset difference threshold; If not, control the oil pump to run at its initial speed and control the water pump to run at its initial speed. The target heat exchange area percentage of the heat exchange module is calculated based on the required heat of the lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the thickness of the medium between the lubricating oil and the coolant, the temperature difference between the actual temperature of the lubricating oil and the actual temperature of the coolant, and the thermal conductivity between the actual temperature of the lubricating oil and the actual temperature of the coolant. Adjust the effective heat exchange area percentage of the heat exchange module to the target heat exchange area percentage; Control the heat dissipation module to operate according to the system's heat dissipation power.

3. The control method of vehicle drive efficiency optimization according to claim 2, characterized by, The method further includes: When the difference between the actual temperature of the lubricating oil and the preset temperature of the lubricating oil is greater than the preset difference threshold, the percentage of the effective heat exchange area of ​​the heat exchange module is adjusted to the maximum. Control the oil pump to run at the preset oil pump speed, and control the water pump to run at the preset water pump speed; The water pump speed adjustment percentage and oil pump speed adjustment percentage are calculated based on the required heat of the lubricating oil, the actual heating power of the motor, the actual heating power of the reducer, the medium thickness between the lubricating oil and the coolant, the temperature difference between the actual temperature of the lubricating oil and the actual temperature of the coolant, the thermal conductivity λ between the actual temperature of the lubricating oil and the actual temperature of the coolant, the maximum heat exchange area of ​​the heat exchange module, the minimum operating speed adjustment percentage of the water pump, and the minimum operating speed adjustment percentage of the oil pump. The oil pump is adjusted based on the oil pump speed adjustment percentage, and the water pump is adjusted based on the water pump speed adjustment percentage; Control the heat dissipation module to operate according to the system's heat dissipation power.

4. The control method of vehicle drive efficiency optimization according to claim 1, characterized by, The process of obtaining the preset temperature of the lubricating oil in the reducer and the preset temperature of the coolant in the motor controller includes: Obtain the vehicle's operating mode and the preset coolant temperature of the motor controller; The preset temperature of the lubricating oil in the reducer is determined based on the operating mode.

5. A control device for vehicle drive efficiency optimization, characterized by, The control device for optimizing vehicle driving efficiency includes: The acquisition unit is used to acquire the preset temperature of the lubricating oil of the reducer and the preset temperature of the coolant of the motor controller; The acquisition unit is also used to acquire the actual temperature of the lubricating oil in the reducer and the actual temperature of the coolant in the motor controller; The first calculation unit is used to calculate the heat demand of the reducer's lubricating oil based on real-time vehicle data, the preset temperature of the lubricating oil, and the actual temperature of the lubricating oil. The first judgment unit is used to determine whether the actual temperature of the lubricating oil is lower than the preset temperature of the lubricating oil. The second judgment unit is used to determine whether the actual temperature of the lubricating oil is greater than the actual temperature of the coolant when the actual temperature of the lubricating oil is less than the preset temperature of the lubricating oil. The control unit is used to control the cooling circuit switching module to disconnect the heat exchange module when the actual temperature of the lubricating oil is greater than the actual temperature of the coolant, and to adjust the operating speed of the oil pump based on the heat demand of the lubricating oil, so that the motor and the reducer heat the lubricating oil of the reducer based on heat loss; The vehicle drive efficiency optimization control device further includes: The control unit is also used to control the cooling circuit switching module to connect to the heat exchange module when the actual temperature of the lubricating oil is not greater than the actual temperature of the coolant. The control unit is also used to control the oil pump to run at the initial oil pump speed and to control the water pump to run at the initial water pump speed. The regulating unit is used to adjust the percentage of the effective heat exchange area of ​​the heat exchange module, the operating speed of the oil pump, and the operating speed of the water pump based on the heat demand of the lubricating oil, so that the motor, the reducer, and the motor controller heat the lubricating oil of the reducer based on heat loss.

6. The control device for vehicle drive efficiency optimization according to claim 5, characterized by, The acquisition unit includes: The acquisition subunit is used to acquire the vehicle's operating mode and the preset coolant temperature of the motor controller; A determination subunit is used to determine the preset temperature of the lubricating oil in the reducer based on the operating mode.

7. An electronic device, comprising: The electronic device includes a memory and a processor, the memory storing a computer program, and the processor running the computer program to enable the electronic device to perform the vehicle drive efficiency optimization control method according to any one of claims 1 to 4.

8. A readable storage medium, characterized by, The readable storage medium stores computer program instructions, which, when read and executed by a processor, perform the vehicle drive efficiency optimization control method according to any one of claims 1 to 4.

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