Lubrication flow processing method and hybrid transmission lubrication flow control method

Abstract

The present application relates to the technical field of transmission, and discloses a lubricating flow processing method and a hybrid power transmission lubricating flow control method, wherein the lubricating flow processing method is characterized by the following steps: obtaining the maximum oil pump lubricating flow of the same electromagnetic valve control current, which can meet the basic demand of the hydraulic system target lubricating flow, guarantee the normal function of the transmission control system, and avoid the risk of heat load deterioration, clutch life reduction and clutch ablation caused by small lubricating flow; traversing multiple electromagnetic valve control currents, selecting the minimum value among the multiple maximum oil pump lubricating flows, and obtaining the minimum oil pump lubricating flow, which can achieve the purpose of optimal system energy consumption by using the minimum oil pump lubricating flow on the basis of guaranteeing the normal function of the transmission control system, avoid the risk of high vehicle energy consumption caused by large lubricating flow, and improve the economic performance of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of transmission technology, and more specifically to a lubrication flow processing method and a lubrication flow control method for hybrid transmissions. Background Technology

[0002] The national strategy of "carbon peaking and carbon neutrality" sets high carbon emission requirements for all sectors of the national economy. my country's automobile industry accounts for a high proportion of carbon emissions. Hybrid vehicles have significantly lower carbon emissions compared to gasoline vehicles, making them an effective way to achieve energy conservation and emission reduction in the automobile industry.

[0003] The wet hybrid dual-clutch automatic transmission is a key component of hybrid vehicles. Because its clutch can be cooled and lubricated by lubricating oil, it has good thermal robustness. At the same time, it has high mechanical efficiency, large torque capacity, can shift without power interruption, is economical and energy-saving, and is compatible with domestic parts manufacturing. It is a transmission product that is more suitable for Chinese hybrid vehicles.

[0004] In the design of the control system for a wet hybrid dual-clutch automatic transmission, in order to achieve low system energy consumption and sufficient lubrication and cooling protection for the clutch, the core key points of the control system design are how to accurately control the lubrication flow and optimize the energy consumption of the electronic pump while ensuring smooth power transmission.

[0005] However, the current cooling and lubrication flow of hybrid automatic transmissions relies entirely on the method of obtaining test data, and does not mention how to balance the oil pump speed and solenoid valve control current to achieve the goal of lower system energy consumption under the same lubrication flow requirements. If the system lubrication flow is too large, it may lead to higher fuel consumption of the vehicle; if the lubrication flow is insufficient, it may lead to severe thermal load, increase the risk of clutch burning, and seriously affect the clutch life. Summary of the Invention

[0006] In view of this, the present invention provides a lubrication flow processing method and a lubrication flow control method for hybrid transmissions to solve the problem of inaccurate cooling and lubrication flow in hybrid automatic transmissions.

[0007] In a first aspect, embodiments of the present invention provide a lubrication flow processing method, comprising the following steps:

[0008] Step 1: Obtain multiple sets of data for the transmission at a reference temperature to obtain a training dataset. Each set of data includes oil pump lubrication flow rate, solenoid valve control current, first oil circuit lubrication flow rate, and second oil circuit lubrication flow rate. Step 2: Based on the training dataset, obtain multiple solenoid valve control currents and corresponding first and second correspondences. The first correspondence reflects the relationship between oil pump lubrication flow rate and first oil circuit lubrication flow rate, while the second correspondence reflects the relationship between oil pump lubrication flow rate and second oil circuit lubrication flow rate. Step 3: For any solenoid valve control current, determine the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate value *m* based on the first correspondence, and determine the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value *n* based on the second correspondence. Step 4: For any given pair of values ​​(m, n), iterate through multiple solenoid valve control currents and obtain multiple maximum oil pump lubrication flows corresponding to the pair of values ​​(m, n) according to Step 3; select the minimum value among the multiple maximum oil pump lubrication flows to obtain the minimum oil pump lubrication flow corresponding to the pair of values ​​(m, n); Step 5: Iterate through multiple pairs of values ​​and obtain the minimum oil pump lubrication flow corresponding to each pair of values ​​according to Step 3 and Step 4; obtain the solenoid valve control current corresponding to each pair of values ​​according to the minimum oil pump lubrication flow corresponding to each pair of values.

[0009] The lubrication flow processing method of this invention acquires multiple sets of data of the transmission at a reference temperature to obtain a training dataset. For any pair of values, the maximum oil pump lubrication flow rate belonging to the same solenoid valve control current is obtained. The maximum oil pump lubrication flow rate can meet the basic requirements of the target lubrication flow rate of the hydraulic system, ensuring the normal function of the transmission control system and avoiding the risks of severe thermal load, reduced clutch life, and clutch burnout caused by insufficient lubrication flow rate. By iterating through multiple solenoid valve control currents at the reference temperature, the minimum value is selected from multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the pair of values. The minimum oil pump lubrication flow rate is the only globally optimal oil pump lubrication flow rate, and the corresponding solenoid valve control current is the globally optimal solenoid valve control current. On the basis of ensuring the normal function of the transmission control system, the minimum oil pump lubrication flow rate is used to achieve the goal of optimal system energy consumption, avoiding the risk of high vehicle energy consumption due to excessive lubrication flow rate and improving the overall vehicle economic performance.

[0010] In an optional embodiment, the lubrication flow processing method further includes the following steps: acquiring multiple training datasets of the transmission at multiple other temperatures besides the reference temperature; obtaining the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at each other temperature according to steps 2 to 5; comparing the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at multiple other temperatures with the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at the reference temperature to obtain the oil pump lubrication flow correction factor and the solenoid valve control current correction factor.

[0011] By obtaining the oil pump lubrication flow correction factor and the solenoid valve control current correction factor, the oil pump lubrication flow can be controlled at multiple other temperatures, thus improving the control accuracy of the hybrid transmission lubrication flow under all operating conditions.

[0012] In one optional implementation, determining the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate value m according to the first correspondence includes: using the first oil circuit lubrication flow rate value m to search in the first correspondence to obtain the first oil pump lubrication flow rate; and / or; determining the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value n according to the second correspondence includes: using the second oil circuit lubrication flow rate value n to search in the second correspondence to obtain the second oil pump lubrication flow rate.

[0013] This allows for convenient and accurate determination of the maximum oil pump lubrication flow rate.

[0014] In one optional implementation, comparing the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at multiple other temperatures with the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at a reference temperature to obtain oil pump lubrication flow rate correction factors and solenoid valve control current correction factors includes: for any other temperature, comparing the minimum oil pump lubrication flow rate corresponding to each value pair at other temperatures with the minimum oil pump lubrication flow rate corresponding to each value pair at the reference temperature to obtain oil pump lubrication flow rate correction factors corresponding to other temperatures; iterating through multiple other temperatures to obtain oil pump lubrication flow rate correction factors corresponding to each other temperature; for any other temperature, comparing the solenoid valve control current corresponding to each value pair at other temperatures with the solenoid valve control current corresponding to each value pair at the reference temperature to obtain solenoid valve control current correction factors corresponding to other temperatures; iterating through multiple other temperatures to obtain solenoid valve control current correction factors corresponding to each other temperature.

[0015] This allows for the convenient and accurate acquisition of the oil pump lubrication flow correction factor and the solenoid valve control current correction factor.

[0016] In one optional implementation, obtaining multiple solenoid valve control currents and a first and a second correspondence corresponding to each solenoid valve control current based on the training dataset includes: obtaining a three-dimensional table based on the training dataset, using first oil circuit lubrication flow data and second oil circuit lubrication flow data, and dividing the three-dimensional table into multiple breakpoints according to the solenoid valve control current, to obtain multiple solenoid valve control currents and a third and a fourth two-dimensional table corresponding to each solenoid valve control current; wherein the third two-dimensional table represents the correspondence between the first oil circuit lubrication flow and the oil pump lubrication flow, and the fourth two-dimensional table represents the correspondence between the second oil circuit lubrication flow and the oil pump lubrication flow; reversing the coordinates of the third two-dimensional table to obtain the first correspondence; and reversing the coordinates of the fourth two-dimensional table to obtain the second correspondence.

[0017] This allows for the convenient and accurate acquisition of the first and second correspondences.

[0018] In one optional implementation, acquiring multiple sets of data of the transmission at a reference temperature to obtain a training dataset includes: acquiring multiple sets of data of the transmission at a reference temperature to obtain a training dataset; wherein the multiple sets of data are the lubrication flow rates of the K1 / K2 clutch, the K0 clutch, and the gear shaft system under different operating conditions; the different operating conditions are due to different lubrication flow rates of the oil pump and / or different control currents of the solenoid valve; for each set of data, fitting the lubrication flow rate data of the K0 clutch and the lubrication flow rate data of the gear shaft system in the set of data to obtain a second oil circuit lubrication flow rate; and using the lubrication flow rate of the K1 / K2 clutch in the set of training data as the first oil circuit lubrication flow rate.

[0019] This allows the training data in the training dataset to be more comprehensive.

[0020] In one optional implementation, fitting the lubrication flow data of the K0 clutch and the lubrication flow data of the gear shaft system to obtain the second oil circuit lubrication flow includes: obtaining the current transmission oil temperature; obtaining a third correspondence between the reference oil temperature and the fitting parameter factor; using the current transmission oil temperature to search in the third correspondence to obtain the current fitting parameter factor; dividing the lubrication flow data of the K0 clutch by the current fitting parameter factor to obtain the first fitting flow; dividing the lubrication flow data of the gear shaft system by 1 and subtracting the difference from the current fitting parameter factor to obtain the second fitting flow; and selecting the larger value between the first fitting flow and the second fitting flow to obtain the second oil circuit lubrication flow.

[0021] This is because, in the hydraulic system of the hybrid transmission, one of the oil outlets of solenoid valve CV1 is connected to the cooling and lubrication oil circuit of the K0 clutch / gear shaft SB (also known as the second oil circuit), and the other oil outlet is connected to the lubrication oil circuit of the K1 / K2 dual clutch (also known as the first oil circuit). Therefore, it is necessary to linearly fit the lubrication flow of the K0 clutch and the lubrication flow of the gear shaft SB to integrate them into the lubrication flow of the second oil circuit.

[0022] Secondly, embodiments of the present invention also provide a method for controlling the lubrication flow of a hybrid transmission, comprising the following steps: obtaining a target value pair and the actual operating temperature of the transmission; wherein, the first number in the target value pair represents a target value for the lubrication flow of a first oil circuit, and the second number represents a target value for the lubrication flow of a second oil circuit; determining the initial oil pump lubrication flow and the initial solenoid valve control current corresponding to the target value pair based on the minimum oil pump lubrication flow and the solenoid valve control current corresponding to each value pair at the reference temperature obtained using the lubrication flow processing method of the first aspect; determining the actual correction factor for the oil pump lubrication flow and the actual correction factor for the solenoid valve control current corresponding to the actual operating temperature based on the oil pump lubrication flow correction factor and the solenoid valve control current correction factor obtained using the lubrication flow processing method of the first aspect; obtaining the target oil pump speed based on the initial oil pump lubrication flow and the actual oil pump lubrication flow correction factor; and obtaining the target solenoid valve control current based on the initial solenoid valve control current and the actual solenoid valve control current correction factor.

[0023] Since the lubrication flow processing method of the first aspect can determine the globally optimal oil pump lubrication flow for each value pair, the lubrication flow control method of the hybrid transmission in this embodiment of the invention can determine the initial oil pump lubrication flow corresponding to the target value pair, i.e., the globally optimal oil pump lubrication flow, and the initial solenoid valve control current, based on the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at the reference temperature obtained in the first aspect. Furthermore, by using the actual correction factor of the oil pump lubrication flow and the actual correction factor of the solenoid valve control current, the target oil pump speed and the target solenoid valve control current can be obtained. That is, on the basis of ensuring the normal function of the transmission control system, the minimum oil pump lubrication flow can be used to achieve the optimal system energy consumption, avoiding the risk of high vehicle energy consumption due to excessive lubrication flow and improving the economic performance of the vehicle.

[0024] In one optional implementation, obtaining the target speed of the oil pump based on the initial oil pump lubrication flow rate and the actual correction factor of the oil pump lubrication flow rate includes: multiplying the initial oil pump lubrication flow rate by the actual correction factor of the oil pump lubrication flow rate to obtain the corrected oil pump lubrication flow rate; and calculating the target speed of the oil pump based on the relationship between the corrected oil pump lubrication flow rate and the design displacement and oil pump efficiency.

[0025] This allows for convenient and accurate determination of the target speed of the oil pump.

[0026] In one optional implementation, obtaining the target control current of the solenoid valve based on the initial solenoid valve control current and the actual correction factor of the solenoid valve control current includes: multiplying the initial solenoid valve control current by the actual correction factor of the solenoid valve control current to obtain the target control current of the solenoid valve.

[0027] This allows for convenient and accurate determination of the target control current of the solenoid valve.

[0028] Thirdly, embodiments of the present invention also provide a lubrication flow processing device, including a first acquisition module, a preprocessing module, a maximum oil pump lubrication flow determination module, a minimum oil pump lubrication flow determination module, and a traversal module; the first acquisition module is used to acquire multiple sets of data of the transmission at a reference temperature to obtain a training dataset, wherein each set of data includes oil pump lubrication flow, solenoid valve control current, first oil circuit lubrication flow, and second oil circuit lubrication flow; the preprocessing module is used to obtain multiple solenoid valve control currents and a first correspondence and a second correspondence corresponding to each solenoid valve control current, wherein the first correspondence reflects the relationship between oil pump lubrication flow and first oil circuit lubrication flow, and the second correspondence reflects the relationship between oil pump lubrication flow and second oil circuit lubrication flow; the maximum oil pump lubrication flow determination module is used to determine the value of the first oil circuit lubrication flow based on the first correspondence for any solenoid valve control current. The first oil pump lubrication flow rate corresponding to m is determined according to the second correspondence relationship, and the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value n is determined. The maximum value between the first oil pump lubrication flow rate and the second oil pump lubrication flow rate is selected to obtain the maximum oil pump lubrication flow rate corresponding to the value pair (m, n), which is used as the oil pump lubrication flow rate that meets the basic working requirements of the transmission under the control current of the solenoid valve. The minimum oil pump lubrication flow rate determination module is used to traverse multiple solenoid valve control currents for any value pair (m, n) and obtain multiple maximum oil pump lubrication flow rates corresponding to the value pair (m, n) using the maximum oil pump lubrication flow rate determination module. The minimum value is selected from the multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the value pair (m, n). The traversal module is used to traverse multiple value pairs and obtain the minimum oil pump lubrication flow rate corresponding to each value pair using the maximum oil pump lubrication flow rate determination module and the minimum oil pump lubrication flow rate determination module.

[0029] Fourthly, embodiments of the present invention also provide a hybrid power transmission lubrication flow processing device, including a second acquisition module, an initial value determination module, a correction factor determination module, and a correction module; wherein the second acquisition module is used to acquire target value pairs and the actual operating temperature of the transmission; wherein the first number in the target value pair represents a first oil circuit lubrication flow target value, and the second number represents a second oil circuit lubrication flow target value; the initial value determination module is used to determine the initial oil pump lubrication flow and the initial solenoid valve control current corresponding to the target value pairs based on the minimum oil pump lubrication flow and the solenoid valve control current corresponding to each value pair at the reference temperature obtained using the lubrication flow processing method of the first aspect; the correction factor determination module is used to determine the actual correction factor of the oil pump lubrication flow and the actual correction factor of the solenoid valve control current corresponding to the actual operating temperature based on the oil pump lubrication flow correction factor and the solenoid valve control current correction factor obtained using the lubrication flow processing method of the first aspect; the correction module is used to obtain the target oil pump speed based on the initial oil pump lubrication flow and the actual oil pump lubrication flow correction factor; and to obtain the target solenoid valve control current based on the initial solenoid valve control current and the actual solenoid valve control current correction factor.

[0030] Fifthly, embodiments of the present invention also provide a computer device, including a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the lubrication flow processing method of the first aspect or any embodiment of the first aspect and / or the lubrication flow control method of the hybrid transmission of the second aspect or any embodiment of the second aspect.

[0031] In a sixth aspect, embodiments of the present invention also provide a transmission system, including the computer equipment of the fifth aspect.

[0032] In a seventh aspect, embodiments of the present invention also provide a computer-readable storage medium storing computer instructions, the computer instructions being configured to cause a computer to perform the lubrication flow processing method of the first aspect or any embodiment of the first aspect and / or the lubrication flow control method of a hybrid transmission of the second aspect or any embodiment of the second aspect. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1This is a schematic diagram of the hydraulic principle of a hybrid transmission hydraulic system;

[0035] Figure 2 This is a flowchart of a lubrication flow processing method according to an embodiment of the present invention;

[0036] Figure 3 This is a flowchart of another lubrication flow processing method according to an embodiment of the present invention;

[0037] Figure 4 This is a flowchart illustrating an example of a lubrication flow processing method according to an embodiment of the present invention;

[0038] Figure 5 This is a flowchart of another lubrication flow processing method according to an embodiment of the present invention;

[0039] Figure 6 These are the lubrication flow curves of the K1 / K2 clutches for 200 hydraulic valve bodies under different system input flow rates (oil temperature 60℃).

[0040] Figure 7 The lubrication flow curves of the K1 / K2 clutches of the 10 transmission assembly under different system input flow rates (oil temperature 60℃);

[0041] Figure 8 This is a flowchart of a hybrid transmission lubrication flow control method according to an embodiment of the present invention;

[0042] Figure 9 This is a flowchart of another hybrid transmission lubrication flow control method according to an embodiment of the present invention;

[0043] Figure 10 This is a structural block diagram of a lubrication flow processing device according to an embodiment of the present invention;

[0044] Figure 11 This is a structural block diagram of a hybrid transmission lubrication flow control device according to an embodiment of the present invention;

[0045] Figure 12 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Figure 1 This is a schematic diagram of the hydraulic principle of a hybrid transmission hydraulic system, such as... Figure 1 As shown, the hydraulic system of the hybrid transmission mainly includes a low-pressure oil pump P, an oil pump motor E, an oil suction filter F1, an oil cooler pressure relief valve BPV, a solenoid valve CV1, an oil cooler Co, a low-pressure filter F2, and a low-pressure filter bypass valve CV.

[0048] Among them, oil pump P is used to provide system flow for hybrid transmission; oil pump motor E is used to drive low-pressure oil pump P, thereby changing the oil supply flow of low-pressure lubrication system; suction filter F1 is used to coarsely filter oil, adsorbing larger impurities in oil and protecting hydraulic oil pump; oil cooler pressure relief valve BPV is used to protect the system and can effectively avoid system overpressure problems caused by blockage of low-pressure filter F2; oil cooler Co is used for system heat dissipation; low-pressure filter F2 is used to finely filter transmission oil, adsorbing smaller impurities in oil and protecting various control valves on branch oil lines; pressure filter bypass valve CV is connected in parallel with F2 in the main oil line. When F2 is severely blocked and the pressure difference between the inlet and outlet of F2 reaches the design pressure difference threshold, valve CV will open, and oil will flow into each branch oil line through valve CV.

[0049] The hydraulic system of the hybrid transmission performs real-time control of various hydraulic valves, such as the low-pressure oil pump P, the oil pump motor E, and the solenoid valve CV1, to respond in real time to the target lubrication flow request of the hybrid transmission and thus meet the lubrication flow requirements of the system.

[0050] According to an embodiment of the present invention, a lubrication flow processing method embodiment is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0051] This embodiment provides a lubrication flow processing method, which can be used in computer equipment. Figure 2 This is a flowchart of a lubrication flow processing method according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0052] Step S201: Obtain multiple sets of data of the transmission at the reference temperature to obtain a training dataset, wherein each set of data includes oil pump lubrication flow, solenoid valve control current, first oil circuit lubrication flow and second oil circuit lubrication flow.

[0053] Step S202: Based on the training dataset, obtain multiple solenoid valve control currents and a first correspondence and a second correspondence corresponding to each solenoid valve control current. The first correspondence reflects the relationship between the oil pump lubrication flow rate and the first oil circuit lubrication flow rate, and the second correspondence reflects the relationship between the oil pump lubrication flow rate and the second oil circuit lubrication flow rate.

[0054] Step S203: For any solenoid valve control current, determine the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate value m according to the first correspondence relationship, and determine the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value n according to the second correspondence relationship. Select the maximum value between the first oil pump lubrication flow rate and the second oil pump lubrication flow rate to obtain the maximum oil pump lubrication flow rate corresponding to the value pair (m, n), which is used as the oil pump lubrication flow rate that meets the basic working requirements of the transmission under the solenoid valve control current.

[0055] In other words, for any pair of values ​​(m, n), the maximum oil pump lubrication flow rate belonging to the same solenoid valve control current is determined. The maximum oil pump lubrication flow rate can meet the basic requirements of the target lubrication flow rate of the hydraulic system, ensure the normal function of the transmission control system, and avoid the risks of poor thermal load, reduced clutch life and clutch burnout caused by insufficient lubrication flow rate.

[0056] Step S204: For the value pair (m, n), iterate through multiple solenoid valve control currents, and obtain multiple maximum oil pump lubrication flow rates corresponding to the value pair (m, n) according to step S203; select the minimum value among the multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the value pair (m, n).

[0057] In other words, by iterating through multiple solenoid valve control currents at the reference temperature, the minimum value is selected from multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the selected value. The minimum oil pump lubrication flow rate is the only globally optimal oil pump lubrication flow rate. Thus, while ensuring the normal functioning of the transmission control system, the minimum oil pump lubrication flow rate can be used to achieve the goal of optimal system energy consumption, avoiding the risk of high vehicle energy consumption due to excessive lubrication flow rate, and improving the overall vehicle economic performance.

[0058] Step S205: Traverse multiple value pairs, obtain the minimum oil pump lubrication flow rate corresponding to each value pair according to steps S203 and S204, and obtain the solenoid valve control current corresponding to each value pair according to the minimum oil pump lubrication flow rate corresponding to each value pair.

[0059] The lubrication flow processing method provided in this embodiment of the invention can obtain the minimum oil pump lubrication flow corresponding to each value pair at the reference temperature. The solenoid valve control current corresponding to this minimum oil pump lubrication flow is the globally optimal solenoid valve control current. This ensures that the transmission control system functions normally while using the minimum oil pump lubrication flow to achieve the optimal system energy consumption, avoiding the risk of high vehicle energy consumption due to excessive lubrication flow and improving the overall vehicle economic performance.

[0060] This embodiment provides a lubrication flow processing method, which can be used in computer equipment. Figure 3 This is a flowchart of another lubrication flow processing method according to an embodiment of the present invention. Figure 4 This is a flowchart illustrating an example of a lubrication flow processing method according to an embodiment of the present invention. Figure 3 and Figure 4 As shown, the process includes the following steps:

[0061] Step S301: Obtain multiple sets of data of the transmission at the reference temperature to obtain a training dataset, wherein each set of data includes oil pump lubrication flow, solenoid valve control current, first oil circuit lubrication flow and second oil circuit lubrication flow.

[0062] In one optional implementation, obtaining multiple sets of data on the transmission at a reference temperature to obtain a training dataset includes the following steps S3011 and S3012.

[0063] Step S3011: Obtain multiple sets of data of the transmission at the reference temperature to obtain a training dataset; wherein the multiple sets of data are the lubrication flow of K1 / K2 clutch, the lubrication flow of K0 clutch and the lubrication flow of gear shaft system under different operating conditions; the lubrication flow of oil pump and / or the control current of solenoid valve are different under different operating conditions.

[0064] For example, 60℃ can be used as the reference temperature. Obtaining multiple sets of data for the transmission at the reference temperature specifically includes: randomly selecting multiple hydraulic valve bodies and conducting lubrication flow tests at 60℃ (control accuracy ±5℃, measurement accuracy ±0.5℃), and placing flow sensors at the low-pressure oil pump P outlet, the K0 main lubrication circuit, the K1K2 main lubrication circuit, and the gear shaft main lubrication circuit. For example, by requesting the low-pressure oil pump speed (speed control accuracy ±5r / min, measurement accuracy ±0.05%FS) and solenoid valve current (current control accuracy ±5mA, measurement accuracy ±0.5mA) according to a pre-set step size, lubrication flow data for the K1K2 clutch, K0 clutch, and gear shaft under different low-pressure pump speeds and control currents can be obtained.

[0065] Step S3012: For each set of data, fit the lubrication flow data of the K0 clutch and the lubrication flow data of the gear shaft system in the set of data to obtain the second oil circuit lubrication flow; take the lubrication flow of the K1 / K2 clutch in the set of training data as the first oil circuit lubrication flow.

[0066] This is because, such as Figure 1 As shown, in the hydraulic system of the hybrid transmission, one outlet of solenoid valve CV1 is connected to the K0 clutch / Rotor motor / gear shaft SB cooling and lubrication oil circuit (also known as the second oil circuit), and the other outlet is connected to the K1 / K2 dual clutch lubrication oil circuit (also known as the first oil circuit). Therefore, it is necessary to linearly fit the lubrication flow rate of K0Rot (including the lubrication flow rate of K0 clutch and Rotor motor) and the lubrication flow rate of gear shaft SB to integrate them into the K0RotSB lubrication flow rate, which is the lubrication flow rate of the second oil circuit.

[0067] In one optional implementation, fitting the lubrication flow data of the K0 clutch and the lubrication flow data of the gear shaft system to obtain the lubrication flow of the second oil circuit includes the following steps:

[0068] Step a1: Obtain the current transmission oil temperature.

[0069] Step a2: Obtain the third correspondence between the reference oil temperature and the fitting parameter factors.

[0070] For example, Table 1 shows the third correspondence between oil temperature and fitting parameter factors (unit: scale factor), which can be obtained through bench experiments.

[0071] <![CDATA[gain _K0RotSB ]]> 0.72 0.70 0.61 0.58 0.57 0.57

[0072] Table 1

[0073] Step a3: Use the current transmission oil temperature to search in the third correspondence to obtain the current fitting parameter factor.

[0074] Step a4: Divide the lubrication flow rate data of the K0 clutch by the current fitting parameter factor to obtain the first fitted flow rate.

[0075] Example, Flow _1 =pumpFlow _K0Rot ÷gain _K0RotSB , where Flow _1 PpumpFlow represents the first fitted flow rate. _K0Rot Indicates the lubrication flow rate of the K0 clutch, gain _K0RotSB This represents the current fitting parameter factor.

[0076] Step a5: Divide the lubrication flow rate data of the gear shaft system by 1 and subtract the difference of the current fitting parameter factor to obtain the second fitted flow rate.

[0077] Example, Flow _2 =PpumpFlow _SB ÷(1-gain _K0RotSB ), where Flow _2 This represents the second fitted flow rate, pumpFlow. _SB Indicates the lubrication flow rate of the gear shaft system, gain _K0RotSB This represents the current fitting parameter factor.

[0078] Step a6: Select the larger value between the first fitted flow rate and the second fitted flow rate to obtain the second oil circuit lubrication flow rate.

[0079] In other words, calculating Flow _1 and Flow _2 The maximum value is the lubrication flow rate of K0RotSB. _K0RotSB .

[0080] The above steps a1 to a6 are equivalent to Figure 4 The lubrication flow rate of K0Rot and the lubrication flow rate of shaft teeth are integrated into K0RotSB lubrication flow rate.

[0081] Step S302: Based on the training dataset, obtain multiple solenoid valve control currents and a first correspondence and a second correspondence corresponding to each solenoid valve control current, wherein the first correspondence reflects the relationship between the oil pump lubrication flow and the first oil circuit lubrication flow, and the second correspondence reflects the relationship between the oil pump lubrication flow and the second oil circuit lubrication flow.

[0082] In one optional implementation, obtaining multiple solenoid valve control currents and a first correspondence and a second correspondence corresponding to each solenoid valve control current based on the training dataset includes the following steps S3021 to S3023.

[0083] Step S3021: Based on the training dataset, obtain a three-dimensional table of first lubrication flow data and second lubrication flow data based on oil pump lubrication flow and solenoid valve current.

[0084] In other words, a three-dimensional table is obtained based on multiple sets of training data in the training dataset. Each set of training data in the training dataset includes oil pump lubrication flow rate, solenoid valve control current, first lubrication flow rate data, and second lubrication flow rate data.

[0085] Step S3022: Divide the three-dimensional table into Q breakpoints according to the solenoid valve control current to obtain Q solenoid valve control currents, and a third two-dimensional table and a fourth two-dimensional table corresponding to each solenoid valve control current; wherein the third two-dimensional table is the correspondence between the lubrication flow rate of the first oil circuit and the lubrication flow rate of the oil pump, and the fourth two-dimensional table is the correspondence between the lubrication flow rate of the second oil circuit and the lubrication flow rate of the oil pump.

[0086] In other words, by dividing the three-dimensional table into Q breakpoints in the control current dimension, we can obtain a third two-dimensional table showing the change of the lubrication flow rate of the first oil circuit with the lubrication flow rate of the oil pump at Q fixed current points, and a fourth two-dimensional table showing the change of the lubrication flow rate of the second oil circuit with the lubrication flow rate of the oil pump.

[0087] The above steps S3021 and S3022 are equivalent to Figure 4 The valve body test data is set with Q breakpoints based on current. At a fixed current, the corresponding relationship between the lubrication flow rate and the low-pressure pump flow rate is obtained for K0RotSB and K1K2 respectively.

[0088] Step S3023: Reverse the coordinates of the third two-dimensional table to obtain the first two-dimensional table (i.e., the first correspondence), and reverse the coordinates of the fourth two-dimensional table to obtain the second two-dimensional table (i.e., the second correspondence).

[0089] In other words, taking a certain current breakpoint as an example, after reversing the horizontal and vertical coordinates of the third and fourth two-dimensional tables in step S3022, we can obtain two-dimensional tables showing the change of low-pressure pump flow rate with K1K2 lubrication flow rate and two-dimensional tables showing the change of low-pressure pump flow rate with K0RotSB lubrication flow rate.

[0090] The above step S3023 is equivalent to Figure 4 The above correspondence is obtained by reversing the horizontal and vertical axes to obtain a table showing the relationship between the low-pressure pump flow rate and the lubrication flow rate of K0RotSB and K1K2.

[0091] Step S303: For any solenoid valve control current, determine the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate value m according to the first correspondence relationship, and determine the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value n according to the second correspondence relationship. Select the maximum value between the first oil pump lubrication flow rate and the second oil pump lubrication flow rate to obtain the maximum oil pump lubrication flow rate corresponding to the value pair (m, n), which is used as the oil pump lubrication flow rate that meets the basic working requirements of the transmission under the solenoid valve control current.

[0092] In one optional implementation, determining the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate value m according to the first correspondence relationship includes: using the first oil circuit lubrication flow rate value m to search in the first correspondence relationship to obtain the first oil pump lubrication flow rate.

[0093] In one optional implementation, determining the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value n according to the second correspondence relationship includes: using the second oil circuit lubrication flow rate value n to search in the second correspondence relationship to obtain the second oil pump lubrication flow rate.

[0094] For example, when the value pair is (m, n), the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate m in (m, n) is obtained in the first two-dimensional table, that is, the m-th point of the first oil circuit lubrication flow rate (K1K2 lubrication flow rate), and its corresponding low-pressure pump flow rate is pumpFlow_m; at the same time, the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate n in (m, n) is obtained in the second two-dimensional table, that is, the n-th point of the second oil circuit lubrication flow rate (K0RotSB lubrication flow rate) is selected, and its corresponding low-pressure pump flow rate is pumpFlow_n. Then, the maximum value of pumpFlow_m and pumpFlow_n is calculated, that is, pumpFlow_mn = max(pumpFlow_m, pumpFlow_n), and pumpFlow_mn is used as the sub-pump lubrication flow rate at the current m-th K1K2 lubrication flow rate point and the n-th K0RotSB lubrication flow rate point. Obviously, this maximum value pumpFlow_mn can simultaneously satisfy the lubrication flow rates of the K1K2 branch and the K0RotSB branch.

[0095] The above step S303 is equivalent to Figure 4 The maximum value of the low-pressure pump flow rate corresponding to the m-th K1K2 lubrication flow rate and the n-th K0RotSB lubrication flow rate is selected as pumpFlow_mn.

[0096] Step S304: For any pair of values ​​(m, n), iterate through multiple solenoid valve control currents, and obtain multiple maximum oil pump lubrication flow rates corresponding to the pair of values ​​(m, n) according to step S303; select the minimum value among the multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the pair of values ​​(m, n).

[0097] For example, dividing the three-dimensional table into Q breakpoints along the control current dimension means that there are Q low-pressure pump lubrication flows at the same K1K2 lubrication flow and K0RotSB lubrication flow points. mn_1 PumpFlow mn_2 …,pumpFlow mn_Q Calculate the minimum value of the flow rate of these Q low-pressure pumps, pumpFlow. mn_optimised =min(pumpFlow) mn_1 ,…,pumpFlow mn_QThe lubrication flow rate of the oil pump at the combination point of the m-th K1K2 lubrication flow rate and the n-th K0RotSB lubrication flow rate is the optimal low-pressure pump lubrication flow rate, and the corresponding current point is the optimal control current.

[0098] The above step S304 is equivalent to Figure 4 For the above lubrication flow rate, the minimum value of pumpFlow_mn corresponding to Q current points is selected as the optimal lubrication flow rate, and the corresponding current point is the optimal current point. This optimal relationship table is stored in the TCU.

[0099] It should be noted that, in order to improve the efficiency of the automatic transmission hydraulic system, the lower the lubrication flow rate of the main oil circuit is set, the better, provided that all branch oil circuits are operating normally. Clearly, this minimum value can simultaneously meet the lubrication flow requirements of the K1K2 and K0RotSB branches, reducing system energy consumption, improving the efficiency of the automatic transmission hydraulic system, and enhancing fuel economy.

[0100] Step S305: Traverse multiple value pairs, obtain the minimum oil pump lubrication flow rate corresponding to each value pair according to steps S303 and S304, and obtain the solenoid valve control current corresponding to each value pair according to the minimum oil pump lubrication flow rate corresponding to each value pair.

[0101] In other words, for each pair of values, the minimum oil pump lubrication flow rate corresponding to each pair of values ​​is obtained according to steps S303 and S304. The solenoid valve control current corresponding to this minimum oil pump lubrication flow rate is the optimal solenoid valve control current.

[0102] For example, Table 2 shows the minimum oil pump lubrication flow rate (in liters per minute) corresponding to each value pair.

[0103]

[0104] Table 2

[0105] In Table 2, K0RotSB represents the lubrication flow rate of the second oil circuit, which is the horizontal axis of Table 2, for example, 0, 0.5...13, 15; K1K2 represents the lubrication flow rate of the first oil circuit, which is the vertical axis of Table 2, for example, 0, 0.5...13, 15. In Table 2, the values ​​filled in the other columns besides the horizontal and vertical axes represent the minimum oil pump lubrication flow rates. For example, when the lubrication flow rate of the first oil circuit is 13 and the lubrication flow rate of the second oil circuit is 0.5, the minimum oil pump lubrication flow rate is 17.28.

[0106] For example, Table 3 shows the solenoid valve control current (in amperes) corresponding to each value pair.

[0107]

[0108] In Table 3, K0RotSB represents the lubrication flow rate of the second oil circuit, which is the horizontal axis of Table 3, for example, 0, 0.5...13, 15; K1K2 represents the lubrication flow rate of the first oil circuit, which is the vertical axis of Table 3, for example, 0, 0.5...13, 15. In Table 3, the other columns besides the horizontal and vertical axes are filled with the solenoid valve control current. For example, when the lubrication flow rate of the first oil circuit is 13 and the lubrication flow rate of the second oil circuit is 0.5, the solenoid valve control current is -2.38.

[0109] The lubrication flow processing method provided in this embodiment of the invention can obtain the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at the reference temperature. This ensures that the transmission control system functions normally while using the minimum oil pump lubrication flow to achieve optimal system energy consumption, avoiding the risk of high vehicle energy consumption due to excessive lubrication flow and improving the overall vehicle economic performance.

[0110] This embodiment provides a lubrication flow processing method, which can be used in computer equipment. Figure 5 This is a flowchart of another lubrication flow processing method according to an embodiment of the present invention, such as... Figure 5 As shown, the process includes the following steps:

[0111] Step S501: Obtain the lubrication flow rate of the K1 / K2 clutch, the lubrication flow rate of the K0 clutch, and the lubrication flow rate of the gear shaft system under different operating conditions of the transmission at -30℃, 0℃, 30℃, 60℃, 90℃, and 120℃, to obtain multiple training datasets; among them, the lubrication flow rate of the oil pump and / or the control current of the solenoid valve are different under different operating conditions.

[0112] Specifically, the training dataset can be obtained through step SA1. Step SA1 includes: randomly selecting 200 hydraulic valve bodies to conduct lubrication flow tests across the entire temperature range, and placing flow sensors at the low-pressure oil pump P outlet, the K0 main lubrication circuit, the K1K2 main lubrication circuit, and the gear shaft main lubrication circuit. First, based on a transmission oil temperature of 30℃ (control accuracy ±5℃, measurement accuracy ±0.5℃), the low-pressure oil pump speed (speed control accuracy ±5r / min, measurement accuracy ±0.05%FS) and the solenoid valve current (current control accuracy ±5mA, measurement accuracy ±0.5mA) are requested according to a pre-set step size. This allows the acquisition of lubrication flow data for different low-pressure pumps and for the K1K2 clutch, K0 clutch, and gear shaft lubrication systems under different control currents. Then, set the transmission oil temperature to -30℃, 0℃, 60℃, 90℃, and 120℃ in sequence, and repeat the above steps to obtain the lubrication flow data of the K1K2 clutch, K0 clutch, and gear shaft system based on the low-pressure pump lubrication flow and control current at different oil temperatures.

[0113] The lubrication flow data of clutches K1K2, K0, and gear shaft system based on low-pressure oil pump lubrication flow and solenoid valve current are analyzed and processed within the full temperature range in step SA1. Figure 6 The K1 / K2 clutch lubrication flow curves for 200 hydraulic valve bodies under different system input flow rates are shown below. Figure 6 As shown, taking 60℃ oil as an example, under different low-pressure oil pump lubrication flow rates, the maximum standard deviation of K1 / K2 at each current point is σ=0.46lpm, corresponding to a current of 850mA. The flow rate distribution is within ±3σ, that is, the maximum deviation within the 99.73% confidence interval is 0.46L<0.5L, indicating good consistency.

[0114] Similarly, under different low-pressure oil pump lubrication flow rates, the maximum standard deviation of K0 at each current point is σ = 0.27lpm, meaning the maximum deviation within the 99.73% confidence interval is 0.27L < 0.5L; the maximum standard deviation of the gear shaft system SB at each current point is σ = 0.2lpm, meaning the maximum deviation within the 99.73% confidence interval is 0.2L < 0.5L. In other words, the training dataset selected in this embodiment of the invention exhibits very high consistency in lubrication flow control for the K1 / K2 clutch, the K0 clutch, and the gear shaft system SB within the range of -30-120℃, thus ensuring that the first and second correspondences obtained from the training data are relatively accurate.

[0115] It should be noted that when assembling the hydraulic valve body into the transmission assembly, manufacturing and assembly processes may affect the lubrication flow of the K1 / K2 clutch, K0 clutch, and gear shaft SB. Therefore, it is necessary to verify whether the lubrication flow distribution relationship of the K1 / K2 clutch, K0 clutch, and gear shaft in the transmission assembly is consistent with the distribution relationship obtained from the hydraulic valve body lubrication flow test. Specifically, 10 hydraulic valve bodies were selected from the 200 samples in step SA1 and assembled into the transmission assembly. Lubrication tests were conducted on these 10 transmission assemblies on a lubrication test bench. Ultrasonic flow meters were used to measure the flow rate of each lubrication circuit, obtaining lubrication flow data for the K1 / K2 clutch, K0 clutch, and gear shaft SB in the transmission assembly under different operating conditions. The test data were then analyzed and processed. Data analysis results show that within the oil temperature range of -30-120℃, the lubrication flow distribution relationship of the K1 / K2 clutch, K0 clutch, and gear shaft in the transmission assembly is highly consistent with the distribution relationship obtained from the hydraulic valve body lubrication flow test. This can be further divided into the following steps:

[0116] SB1: Select 10 hydraulic valve bodies from the 200 samples in step SA1 and assemble them into the transmission assembly. Perform lubrication tests on these 10 transmission assemblies on a lubrication test bench. Use an ultrasonic flow meter to measure the flow rate of each lubrication circuit, obtaining lubrication flow rate test data for the K1 / K2 clutch, K0 clutch, and gear shaft system under different operating conditions. Sequentially set the transmission oil temperature to -30℃, 0℃, 30℃, 60℃, 90℃, and 120℃. Request the low-pressure oil pump speed and solenoid valve control current according to the preset step size. This will obtain the SB lubrication flow rate data for the K1 / K2 clutch, K0 clutch, and gear shaft system at different oil temperatures, based on the low-pressure pump flow rate and control current.

[0117] SB2: Analyze and process the test data of lubrication flow rate of clutches K1K2, K0, and gear shaft system SB based on low-pressure pump flow rate and control current across the entire temperature range in step SB1. Figure 7 The K1 / K2 clutch lubrication flow curves for 10 transmission assemblies under different system input flow rates are shown below. Figure 7 As shown, taking 60℃ oil as an example, under different low-pressure oil pump lubrication flow rates, the maximum standard deviation of K1 / K2 at each current point is σ=0.40lpm, corresponding to a current of 850mA. The flow rate distribution is within ±3σ, that is, the maximum deviation within the 99.73% confidence interval is 0.40L<0.5L, indicating good consistency.

[0118] Similarly, under different low-pressure oil pump lubrication flow rates, the maximum standard deviation of K0 at each current point was σ = 0.24 lpm, meaning the maximum deviation within the 99.73% confidence interval was 0.24L < 0.5L; the maximum standard deviation of the gear shaft system SB at each current point was σ = 0.11 lpm, meaning the maximum deviation within the 99.73% confidence interval was 0.11L < 0.5L. This indicates that within the oil temperature range of -30-120℃, the lubrication flow distribution relationship of the K1 / K2 clutch, K0 clutch, and gear shaft system SB in the transmission assembly is highly consistent with the correlation distribution relationship obtained from the hydraulic valve body lubrication flow test.

[0119] Step S502: Based on the training dataset corresponding to 60℃, obtain multiple solenoid valve control currents, and a first correspondence and a second correspondence relationship corresponding to each solenoid valve control current. The first correspondence relationship reflects the relationship between the oil pump lubrication flow rate and the lubrication flow rate in the first oil circuit, and the second correspondence relationship reflects the relationship between the oil pump lubrication flow rate and the lubrication flow rate in the second oil circuit. For details, please refer to [link to details]. Figure 3 Step S302 of the illustrated embodiment will not be described again here.

[0120] Step S503: For any solenoid valve control current, determine the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate value m according to the first correspondence relationship, and determine the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value n according to the second correspondence relationship. Select the maximum value between the first and second oil pump lubrication flow rates to obtain the maximum oil pump lubrication flow rate corresponding to the value pair (m, n), which is taken as the oil pump lubrication flow rate that meets the basic operating requirements of the transmission under the solenoid valve control current. For details, please refer to [link to details]. Figure 3 Step S303 of the illustrated embodiment will not be described again here.

[0121] Step S504: For any pair of values ​​(m, n), iterate through multiple solenoid valve control currents, and according to step S503, obtain multiple maximum oil pump lubrication flow rates corresponding to the pair of values ​​(m, n); select the minimum value among the multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the pair of values ​​(m, n). For details, please refer to... Figure 3 Step S304 of the illustrated embodiment will not be described again here.

[0122] Step S505: Iterate through multiple value pairs, and obtain the minimum oil pump lubrication flow rate corresponding to each value pair at 60℃ according to steps S503 and S504. Then, obtain the solenoid valve control current corresponding to each value pair based on the minimum oil pump lubrication flow rate. For details, please refer to [link to details]. Figure 3 Step S305 of the illustrated embodiment will not be described again here.

[0123] Step S506: For the training datasets corresponding to -30℃, 0℃, 30℃, 90℃, and 120℃, process them according to the methods in steps S502 to S505 respectively to obtain the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at -30℃, 0℃, 30℃, 90℃, and 120℃.

[0124] Step S507: Compare the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value at -30℃, 0℃, 30℃, 90℃, and 120℃ with the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value at 60℃ to obtain the oil pump lubrication flow rate correction factor and the solenoid valve control current correction factor.

[0125] In one optional implementation, the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at multiple other temperatures are compared with the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at the reference temperature to obtain the oil pump lubrication flow rate correction factor and the solenoid valve control current correction factor, including steps S5071 to S5072.

[0126] Step S5071: For any other temperature, compare the minimum oil pump lubrication flow rate corresponding to each value pair at the other temperature with the minimum oil pump lubrication flow rate corresponding to each value pair at the reference temperature to obtain the oil pump lubrication flow rate correction factor corresponding to other temperatures; iterate through multiple other temperatures to obtain the oil pump lubrication flow rate correction factor corresponding to each other temperature.

[0127] For example, Table 4 shows the oil pump lubrication flow correction factor (unit: proportional factor).

[0128] <![CDATA[gain _LPflow ]]> 1.92 0.98 0.98 1 1.01 1.01

[0129] Table 4

[0130] In Table 4, gain _LPflow This indicates the oil pump lubrication flow correction factor.

[0131] Step S5072: For any other temperature, compare the solenoid valve control current corresponding to each value pair at the other temperature with the solenoid valve control current corresponding to each value pair at the reference temperature to obtain the solenoid valve control current correction factor corresponding to other temperatures; iterate through multiple other temperatures to obtain the solenoid valve control current correction factor corresponding to each other temperature.

[0132] For example, Table 5 shows the solenoid valve control current correction factor (unit: proportional factor).

[0133] <![CDATA[gain _Current ]]> 0.52 0.60 0.89 1 1.02 1.02

[0134] Table 5

[0135] In Table 5, gain _Current This indicates the oil pump lubrication flow correction factor.

[0136] It should be noted that the invention patent application with publication number CN113719603A provides a method for controlling the cooling and lubrication flow of a transmission, including the following steps: obtaining the target cooling and lubrication flow of the transmission, which includes the target cooling flow of the main clutch, the target cooling flow of the dual clutch, and the target lubrication flow of the gear shaft system; determining the target relationship table corresponding to the current transmission oil temperature, which includes the correspondence between the cooling and lubrication flow and the oil pump speed and the flow control solenoid valve current; searching for the oil pump speed and control current corresponding to the target cooling and lubrication flow in the target relationship table; and controlling the operation of the hydraulic module according to the search results and the cooling requirements of the main clutch to control the cooling and lubrication flow of the transmission. The target relationship table is obtained by taking points at integer multiples of 5°C to acquire lubrication data across the entire temperature range, obtaining basic relationship tables for the upper and lower limit components respectively. The basic data of the lower limit component is corrected by using the EOL (End Of Line) data of the hydraulic module and the maximum deviation relationship table, and interpolation is used to obtain the target relationship table for different transmission oil temperatures.

[0137] The above solution has the following problems:

[0138] 1. The cooling and lubrication flow control method of this scheme relies entirely on the method of obtaining experimental data, and does not mention what standard to use to balance the oil pump speed and control current to achieve the goal of minimizing system energy consumption under the same lubrication flow requirements.

[0139] The method disclosed in CN113719603A obtains the basic relationship tables of the upper and lower limit components. It then corrects the basic data of the lower limit component solely using the EOL (End-of-Life) data and the maximum deviation relationship table from the hydraulic module, storing the target relationship table in the TCU. Its cooling and lubrication flow rate relies entirely on the method of obtaining experimental data. Under the same lubrication flow rate requirement, when there are at least two pairs of combinations of pump speed and control current in the target relationship table, the key to reducing system energy consumption lies in determining the optimal pump speed and control current correspondence using appropriate criteria—that is, how to balance this correspondence. This method does not provide a clear solution to this critical issue. Randomly selecting a correspondence could easily lead to increased system energy consumption, resulting in a decrease in the overall vehicle's economic performance.

[0140] 2. The method for setting temperature range segments is not clearly specified. Different methods of setting oil temperature range segments will directly affect the accuracy of clutch lubrication flow calculation.

[0141] (1) If the temperature range is segmented in large increments, the transmission oil temperature outside the temperature range can only be determined by identifying which temperature range it falls within, and then directly selecting the target relationship table corresponding to the smaller temperature breakpoint value as the target relationship table corresponding to the current oil temperature to obtain the lubrication flow rate. Due to the small number of temperature segments, this lubrication flow rate is difficult to reflect the actual lubrication flow rate requirement at that temperature. Simply correcting the basic data of the lower limit component based on the EOL offline data and the maximum deviation relationship table of the hydraulic module, storing it as standard data in the TCU (Transmission Control Unit), and applying it to all mass-produced vehicles will lead to unreasonable lubrication flow control caused by inaccurate transmission lubrication data. If the system lubrication flow rate is too high, it may lead to higher fuel consumption of the entire vehicle; if the lubrication flow rate is insufficient, it may lead to severe thermal load, increase the risk of clutch burnout, and seriously affect the clutch life.

[0142] (2) If the temperature range segments are small, they occupy a large amount of storage space in the TCU controller. The method disclosed in CN113719603A, after taking points at 5°C intervals to conduct lubrication data acquisition tests across the entire temperature range, interpolates the target relationship tables for different transmission oil temperatures based on the EOL offline data of the hydraulic module, the basic hydraulic module relationship table of the lower limit component, and the maximum deviation relationship table between the upper and lower limit components, and stores them in the TCU. Each target relationship table is a three-dimensional table of lubrication flow rate of clutch K0, clutch K1 / K2, and gear shaft system with different oil pump speeds and different control currents. Therefore, many tables will occupy the TCU's memory space, resulting in an increase in software code, a large amount of storage space occupied by the TCU controller, and a high system memory load.

[0143] (3) If the temperature range segments are small, the calibration workload of the calibration engineer will increase significantly. As shown above, storing many three-dimensional tables in the TCU will significantly increase the calibration workload and make the calibration work more difficult, and there is a risk that the calibration will not be suitable.

[0144] The lubrication flow processing method of this invention obtains the minimum oil pump lubrication flow rate corresponding to each value pair at the reference temperature (Table 2), the solenoid valve control current corresponding to each value pair at the reference temperature (Table 3), the oil pump lubrication flow rate correction factor corresponding to each other temperature (Table 4), and the solenoid valve control current correction factor corresponding to each other temperature (Table 5). Table 2 is the only globally optimal oil pump lubrication flow rate, and the corresponding solenoid valve control current is the globally optimal solenoid valve control current, i.e., Table 3. While ensuring the normal functioning of the transmission control system, the method achieves optimal system energy consumption with the minimum oil pump lubrication flow rate. Simultaneously, Tables 4 and 5, the two oil temperature compensation tables, compensate for data differences under different transmission oil temperatures, improving the calculation accuracy of low-pressure lubrication flow rate of the hybrid transmission under all operating conditions. Furthermore, it avoids the problems of large controller storage space occupation and high system memory load during mass production caused by directly using experimental data for lubrication flow control. Furthermore, Tables 2 and 4 pertain to oil pump lubrication flow rate, while Tables 3 and 5 pertain to solenoid valve control current. Therefore, based on these four tables, the oil pump lubrication flow rate and solenoid valve control current can be clearly determined. In summary, the lubrication flow processing method provided by the embodiments of the present invention can effectively avoid the risks of severe thermal load, reduced clutch life and clutch burning caused by insufficient lubrication flow, while also avoiding the risk of increased vehicle energy consumption caused by excessive lubrication flow, thus improving the economic performance of the vehicle.

[0145] The lubrication flow processing method of this invention addresses the issue of obtaining the maximum oil pump lubrication flow rate belonging to the same solenoid valve control current for any given pair of values ​​at a reference transmission oil temperature. This maximum value satisfies the basic requirements of the hydraulic system's target lubrication flow rate, ensuring the normal functioning of the transmission control system. By iterating through multiple solenoid valve control currents at the reference temperature and selecting the minimum value among these maximum values, the oil pump lubrication flow rate corresponding to the given pair is obtained. This minimum value is the only globally optimal oil pump lubrication flow rate. While ensuring the normal functioning of the transmission control system, the method achieves optimal system energy consumption with the minimum oil pump lubrication flow rate. This effectively avoids the risks of severe thermal load, reduced clutch life, and clutch burnout caused by insufficient lubrication flow rate, while also avoiding the risk of increased vehicle fuel consumption due to excessive lubrication flow rate.

[0146] Furthermore, in this embodiment of the invention, the lubrication flow test data is preprocessed offline to obtain Tables 2, 3, 4 and 5; only the above four tables are stored in the TCU, instead of using a multi-breakpoint relation table across the entire temperature range as in CN113719603A, which reduces the amount of code to a certain extent, saves controller memory space, and reduces system load.

[0147] Furthermore, calibration engineers only need to calibrate the above four tables during the calibration process, which greatly reduces the workload and difficulty of calibration, and further mitigates the risk of decreased system lubrication flow control accuracy due to excessive calibration data or unsuitable calibration.

[0148] According to an embodiment of the present invention, a method for controlling lubrication flow in a hybrid transmission is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0149] This embodiment provides a method for controlling the lubrication flow of a hybrid transmission, which can be used in computer equipment. Figure 8 This is a flowchart of a hybrid transmission lubrication flow control method according to an embodiment of the present invention, such as... Figure 8 As shown, the process includes the following steps:

[0150] Step S801: Obtain the target value pair and the actual operating temperature of the transmission; wherein, the first number in the target value pair represents the target value of the lubrication flow rate of the first oil circuit, and the second number represents the target value of the lubrication flow rate of the second oil circuit.

[0151] like Figure 1 As shown, in the hydraulic system of the hybrid transmission, one of the oil outlets of the solenoid valve CV1 is connected to the cooling and lubrication oil circuit of the K0 clutch / Rotor motor / gear shaft (also known as the second oil circuit), and the other oil outlet is connected to the lubrication oil circuit of the K1 / K2 dual clutch (also known as the first oil circuit).

[0152] Specifically, the target values ​​for the first and second oil circuit lubrication flow rates can be determined based on thermal model calculations and empirical values, according to the current driving conditions of the vehicle.

[0153] The target value of the first oil circuit lubrication flow rate is the target cooling flow rate of the K1 / K2 dual clutch. The K1 / K2 clutch is connected between the motor and the output shaft of the power system to ensure torque transmission, smoothness and comfort during gear shifting.

[0154] The target lubrication flow rate for the second oil circuit is the target cooling and lubrication flow rate of K0RotSB. The target cooling and lubrication flow rate of K0Rot is the required cooling and lubrication flow rate for the K0 clutch and motor. The K0 clutch connects the engine and motor and is used to start the engine. The target cooling and lubrication flow rate of SB is the target cooling and lubrication flow rate for the gear shaft system.

[0155] Step S802: Determine the initial oil pump lubrication flow rate and initial solenoid valve control current corresponding to the target value pair based on the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at the reference temperature.

[0156] For example, when the target value of the first oil circuit lubrication flow rate is on the vertical axis of Table 2 and the target value of the second oil circuit lubrication flow rate is on the horizontal axis of Table 2, the initial oil pump lubrication flow rate can be obtained by looking it up in Table 2. When the target value of the first oil circuit lubrication flow rate is not on the vertical axis of Table 2 and / or the target value of the second oil circuit lubrication flow rate is not on the horizontal axis of Table 2, the initial oil pump lubrication flow rate can be obtained by calculating the difference.

[0157] For example, when the target value of the lubrication flow rate of the first oil circuit is in the vertical axis of Table 3 and the target value of the lubrication flow rate of the second oil circuit is in the horizontal axis of Table 3, the initial solenoid valve control current can be obtained by looking up in Table 3. When the target value of the lubrication flow rate of the first oil circuit is not in the vertical axis of Table 3 and / or the target value of the lubrication flow rate of the second oil circuit is not in the horizontal axis of Table 3, the initial solenoid valve control current can be obtained by calculating the difference.

[0158] Step S803: Determine the actual correction factor for the oil pump lubrication flow rate and the actual correction factor for the solenoid valve control current corresponding to the actual operating temperature, based on the oil pump lubrication flow rate correction factor and the solenoid valve control current correction factor, respectively.

[0159] It should be noted that Table 4 only lists the lubrication flow rate and temperature compensation parameter factors corresponding to a portion of the transmission fluid temperatures. When the current transmission fluid temperature is not listed in Table 4, two temperatures corresponding to the current transmission fluid temperature can be obtained from Table 4. The current lubrication flow rate and temperature compensation parameter factor corresponding to the current transmission fluid temperature can then be determined based on the lubrication flow rate and temperature compensation parameter factors corresponding to these two temperatures. Interpolation can be used to determine the current lubrication flow rate and temperature compensation parameter factor corresponding to the current transmission fluid temperature.

[0160] Table 5 lists only the solenoid valve control current oil temperature compensation parameter factors corresponding to some transmission fluid temperatures. When the current transmission fluid temperature is not listed in Table 5, two temperatures corresponding to the current transmission fluid temperature can be obtained from Table 5. The current solenoid valve control current oil temperature compensation parameter factor corresponding to the current transmission fluid temperature can then be determined based on the solenoid valve control current oil temperature compensation parameter factors corresponding to these two temperatures. Specifically, the determination of the current solenoid valve control current oil temperature compensation parameter factor corresponding to the current transmission fluid temperature can be achieved using interpolation.

[0161] Step S804: Obtain the target speed of the oil pump based on the initial oil pump lubrication flow rate and the actual correction factor of the oil pump lubrication flow rate; obtain the target control current of the solenoid valve based on the initial solenoid valve control current and the actual correction factor of the solenoid valve control current.

[0162] Since the lubrication flow processing method of the first aspect can determine the globally optimal oil pump lubrication flow for each value pair, the lubrication flow control method of the hybrid transmission in this embodiment of the invention can determine the initial oil pump lubrication flow corresponding to the target value pair, i.e., the globally optimal oil pump lubrication flow, and the initial solenoid valve control current, based on the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at the reference temperature obtained in the first aspect. Furthermore, by using the actual correction factor of the oil pump lubrication flow and the actual correction factor of the solenoid valve control current, the target oil pump speed and the target solenoid valve control current can be obtained. That is, on the basis of ensuring the normal function of the transmission control system, the minimum oil pump lubrication flow can be used to achieve the optimal system energy consumption, avoiding the risk of high vehicle energy consumption due to excessive lubrication flow and improving the economic performance of the vehicle.

[0163] This embodiment provides a method for controlling the lubrication flow of a hybrid transmission, which can be used in computer equipment. Figure 9 This is a flowchart of another hybrid transmission lubrication flow control method according to an embodiment of the present invention, such as... Figure 9 As shown, the process includes the following steps:

[0164] Step S901: Obtain the target value pair and the actual operating temperature of the transmission; wherein, the first number in the target value pair represents the target value of the lubrication flow rate of the first oil circuit, and the second number represents the target value of the lubrication flow rate of the second oil circuit.

[0165] Step S902: Determine the initial oil pump lubrication flow rate and initial solenoid valve control current corresponding to the target value pair based on the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at the reference temperature obtained by the lubrication flow rate processing method of claim 2.

[0166] Step S903: Determine the actual correction factor for the oil pump lubrication flow and the actual correction factor for the solenoid valve control current corresponding to the actual operating temperature based on the oil pump lubrication flow correction factor and the solenoid valve control current correction factor obtained by the lubrication flow processing method of claim 2.

[0167] Step S904: Obtain the target speed of the oil pump based on the initial oil pump lubrication flow rate and the actual correction factor of the oil pump lubrication flow rate; obtain the target control current of the solenoid valve based on the initial solenoid valve control current and the actual correction factor of the solenoid valve control current.

[0168] In one optional implementation, obtaining the target oil pump speed based on the initial oil pump lubrication flow rate and the actual correction factor of the oil pump lubrication flow rate includes steps S9041 to S9042.

[0169] Step S9041: Multiply the initial oil pump lubrication flow rate by the actual oil pump lubrication flow rate correction factor to obtain the corrected oil pump lubrication flow rate.

[0170] For example, you can use LPpumpFlow=pumpFlow optimised *gain _LPflow The corrected lubrication flow rate is calculated. Here, LPpumpFlow represents the corrected lubrication flow rate, and pumpFlow... optimised Indicates the initial lubrication flow rate, gain _LPflow This indicates the current lubrication flow rate and oil temperature compensation parameter factor.

[0171] Step S9042: Calculate the target speed of the oil pump based on the relationship between the lubrication flow rate of the corrected oil pump and the design displacement and oil pump efficiency.

[0172] For example, the low-pressure pump lubrication flow rate (LPpumpFlow), design displacement (Qp), and pump efficiency can be used as a basis. _Pump The target required pump speed is calculated using the following formula: PumpSpd = LPpumpFlow ÷ Qp ÷ Efficency _Pump .

[0173] In one optional implementation, obtaining the target control current of the solenoid valve based on the initial solenoid valve control current and the actual correction factor of the solenoid valve control current includes step S9043.

[0174] Step S9043: Obtain the target control current of the solenoid valve by multiplying the initial solenoid valve control current by the actual correction factor of the solenoid valve control current.

[0175] For example, you can use TgtCurrent = LV1Current * gain _Current Calculate the target control current. Where TgtCurrent represents the target control current, LV1Current represents the initial control current, and gain... _Current This indicates the current control current oil temperature compensation parameter factor.

[0176] The lubrication flow control method for hybrid transmissions provided in this invention can effectively improve the accuracy of low-pressure lubrication flow control in hybrid transmissions under all operating conditions, reduce system energy consumption, and improve fuel economy.

[0177] This embodiment also provides a lubrication flow processing device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0178] This invention also provides a lubrication flow processing device, such as... Figure 10 As shown, it includes:

[0179] The first acquisition module 1001 is used to acquire multiple sets of data of the transmission at the reference temperature to obtain a training dataset, wherein each set of data includes oil pump lubrication flow, solenoid valve control current, first oil circuit lubrication flow and second oil circuit lubrication flow.

[0180] The preprocessing module 1002 is used to obtain multiple solenoid valve control currents and a first correspondence and a second correspondence corresponding to each solenoid valve control current based on the training dataset. The first correspondence reflects the relationship between the oil pump lubrication flow and the first oil circuit lubrication flow, and the second correspondence reflects the relationship between the oil pump lubrication flow and the second oil circuit lubrication flow.

[0181] The maximum oil pump lubrication flow determination module 1003 is used to determine the first oil pump lubrication flow corresponding to the first oil circuit lubrication flow value m according to the first correspondence relationship for any solenoid valve control current, and to determine the second oil pump lubrication flow corresponding to the second oil circuit lubrication flow value n according to the second correspondence relationship. The maximum value between the first oil pump lubrication flow and the second oil pump lubrication flow is selected to obtain the maximum oil pump lubrication flow corresponding to the value pair (m, n), which is used as the oil pump lubrication flow that meets the basic working requirements of the transmission under the solenoid valve control current.

[0182] The minimum oil pump lubrication flow determination module 1004 is used to traverse multiple solenoid valve control currents for any pair of values ​​(m, n), and obtain multiple maximum oil pump lubrication flow rates corresponding to the pair of values ​​(m, n) using the maximum oil pump lubrication flow determination module; and select the minimum value among the multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the pair of values ​​(m, n).

[0183] Traversal module 1005 is used to traverse multiple value pairs and obtain the minimum oil pump lubrication flow rate corresponding to each value pair using the maximum oil pump lubrication flow rate determination module and the minimum oil pump lubrication flow rate determination module.

[0184] In an optional embodiment, the lubrication flow processing device further includes a correction factor determination module. The first acquisition module 1001 is further configured to acquire multiple training datasets of the transmission at multiple other temperatures besides the reference temperature; the preprocessing module 1002, the maximum oil pump lubrication flow determination module 1003, the minimum oil pump lubrication flow determination module 1004, and the traversal module 1005 are further configured to obtain the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at each other temperature; the correction factor determination module is configured to: compare the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at multiple other temperatures with the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at the reference temperature, to obtain an oil pump lubrication flow correction factor and a solenoid valve control current correction factor.

[0185] In one optional embodiment, the maximum oil pump lubrication flow rate determination module 1003 includes a value pair determination unit, a first oil pump lubrication flow rate determination unit, a second oil pump lubrication flow rate determination unit, and a maximum oil pump lubrication flow rate determination unit. The first oil pump lubrication flow rate determination unit is used to: search for the first oil circuit lubrication flow rate m in a first correspondence relationship to obtain the first oil pump lubrication flow rate. The second oil pump lubrication flow rate determination unit is used to: search for the second oil circuit lubrication flow rate n in a second correspondence relationship to obtain the second oil pump lubrication flow rate.

[0186] In one optional implementation, the correction factor determination module is specifically used for: for any other temperature, comparing the minimum oil pump lubrication flow rate corresponding to each value pair at the other temperature with the minimum oil pump lubrication flow rate corresponding to each value pair at the reference temperature to obtain an oil pump lubrication flow rate correction factor corresponding to other temperatures; iterating through multiple other temperatures to obtain an oil pump lubrication flow rate correction factor corresponding to each other temperature; for any other temperature, comparing the solenoid valve control current corresponding to each value pair at the other temperature with the solenoid valve control current corresponding to each value pair at the reference temperature to obtain a solenoid valve control current correction factor corresponding to other temperatures; iterating through multiple other temperatures to obtain a solenoid valve control current correction factor corresponding to each other temperature.

[0187] In one optional implementation, the preprocessing module 1002 is specifically used to: obtain a three-dimensional table based on the training dataset, consisting of first oil circuit lubrication flow data and second oil circuit lubrication flow data, based on the oil pump lubrication flow and solenoid valve control current; divide the three-dimensional table into Q breakpoints based on the solenoid valve control current, obtaining Q solenoid valve control currents, and a third two-dimensional table and a fourth two-dimensional table corresponding to each solenoid valve control current; wherein the third two-dimensional table represents the correspondence between the first oil circuit lubrication flow and the oil pump lubrication flow, and the fourth two-dimensional table represents the correspondence between the second oil circuit lubrication flow and the oil pump lubrication flow; invert the coordinates of the third two-dimensional table to obtain a first correspondence; and invert the coordinates of the fourth two-dimensional table to obtain a second correspondence.

[0188] In one optional embodiment, the first acquisition module 1001 includes an acquisition unit and a fitting unit. The acquisition unit is used to acquire multiple sets of data from the transmission at a reference temperature to obtain a training dataset; wherein the multiple sets of data are the lubrication flow rates of the K1 / K2 clutch, the K0 clutch, and the gear shaft system under different operating conditions; the different operating conditions are due to different lubrication flow rates of the oil pump and / or different control currents of the solenoid valves; the fitting unit is used to fit the lubrication flow rate data of the K0 clutch and the lubrication flow rate data of the gear shaft system in each set of data to obtain a second oil circuit lubrication flow rate; the lubrication flow rate of the K1 / K2 clutch in the training dataset is used as the first oil circuit lubrication flow rate.

[0189] In one optional implementation, the fitting unit is specifically used for: obtaining the current transmission oil temperature; obtaining a third correspondence between the reference oil temperature and the fitting parameter factor; using the current transmission oil temperature to search in the third correspondence to obtain the current fitting parameter factor; dividing the lubrication flow data of the K0 clutch by the current fitting parameter factor to obtain the first fitting flow rate; dividing the lubrication flow data of the gear shaft system by 1 and subtracting the difference from the current fitting parameter factor to obtain the second fitting flow rate; and selecting the larger value between the first fitting flow rate and the second fitting flow rate to obtain the second oil circuit lubrication flow rate.

[0190] This invention also provides a lubrication flow control device for a hybrid power transmission, such as... Figure 11 As shown, it includes:

[0191] The second acquisition module 1101 is used to acquire the target value pair and the actual operating temperature of the transmission; wherein, the first number in the target value pair represents the target value of the first oil circuit lubrication flow rate, and the second number represents the target value of the second oil circuit lubrication flow rate.

[0192] The initial value determination module 1102 is used to determine the initial oil pump lubrication flow and the initial solenoid valve control current corresponding to the target value pair based on the minimum oil pump lubrication flow and solenoid valve control current corresponding to each value pair at the reference temperature obtained by the lubrication flow processing method.

[0193] The correction factor determination module 1103 is used to determine the actual correction factor of the oil pump lubrication flow and the actual correction factor of the solenoid valve control current corresponding to the actual working temperature, based on the correction factor of the oil pump lubrication flow and the correction factor of the solenoid valve control current obtained by the lubrication flow processing method.

[0194] The correction module 1104 is used to obtain the target speed of the oil pump based on the initial oil pump lubrication flow rate and the actual correction factor of the oil pump lubrication flow rate; and to obtain the target control current of the solenoid valve based on the initial solenoid valve control current and the actual correction factor of the solenoid valve control current.

[0195] In one optional implementation, the correction module 1104 includes a first correction unit and a second correction unit.

[0196] The first correction unit is specifically used to obtain the corrected oil pump lubrication flow rate by multiplying the initial oil pump lubrication flow rate by the actual correction factor of the oil pump lubrication flow rate; and to calculate the target speed of the oil pump based on the relationship between the corrected oil pump lubrication flow rate and the design displacement and oil pump efficiency.

[0197] The second correction unit is specifically used to: obtain the target control current of the solenoid valve by multiplying the initial solenoid valve control current by the actual correction factor of the solenoid valve control current.

[0198] This invention also provides a computer device having the above-described features. Figure 10 The lubrication flow processing device and / or shown Figure 11 The lubrication flow control device for the hybrid transmission shown is an example of this.

[0199] Please see Figure 12 , Figure 12 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 12As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 12 Take a processor 10 as an example.

[0200] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0201] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0202] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0203] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0204] The computer device also includes an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 40 can be connected via a bus or other means. Figure 12 Taking the example of a connection between China and Israel via a bus.

[0205] Input device 30 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 40 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0206] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0207] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for processing lubrication flow, characterized in that, include: Step 1: Obtain multiple sets of data for the transmission at the reference temperature to obtain a training dataset, where each set of data includes oil pump lubrication flow, solenoid valve control current, first oil circuit lubrication flow, and second oil circuit lubrication flow. Step 2: Based on the training dataset, obtain multiple solenoid valve control currents, and a first correspondence and a second correspondence corresponding to each solenoid valve control current, wherein the first correspondence reflects the relationship between the oil pump lubrication flow rate and the first oil circuit lubrication flow rate, and the second correspondence reflects the relationship between the oil pump lubrication flow rate and the second oil circuit lubrication flow rate. Step 3: For any solenoid valve control current, determine the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate value m according to the first correspondence relationship, and determine the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value n according to the second correspondence relationship. Select the maximum value between the first oil pump lubrication flow rate and the second oil pump lubrication flow rate to obtain the maximum oil pump lubrication flow rate corresponding to the value pair (m, n), which is used as the oil pump lubrication flow rate that meets the basic working requirements of the transmission under the solenoid valve control current. Step 4: For the given value pair (m, n), iterate through the multiple solenoid valve control currents, and obtain multiple maximum oil pump lubrication flow rates corresponding to the given value pair (m, n) according to Step 3; select the minimum value among the multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the given value pair (m, n); Step 5: Traverse the multiple value pairs, obtain the minimum oil pump lubrication flow rate corresponding to each value pair according to Step 3 and Step 4, and obtain the solenoid valve control current corresponding to each value pair according to the minimum oil pump lubrication flow rate corresponding to each value pair.

2. The method according to claim 1, characterized in that, Also includes: Obtain multiple training datasets of the transmission at multiple other temperatures besides the reference temperature, and obtain the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at each of the other temperatures according to steps 2 to 5. The minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each of the other temperatures are compared with the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each of the other temperatures at the reference temperature to obtain the oil pump lubrication flow rate correction factor and the solenoid valve control current correction factor.

3. The method according to claim 1 or 2, characterized in that, The step of determining the first oil pump lubrication flow rate corresponding to the first oil circuit lubrication flow rate value m according to the first correspondence relationship includes: using the first oil circuit lubrication flow rate value m to search in the first correspondence relationship to obtain the first oil pump lubrication flow rate; and / or; The step of determining the second oil pump lubrication flow rate corresponding to the second oil circuit lubrication flow rate value n according to the second correspondence relationship includes: using the second oil circuit lubrication flow rate value n to search in the second correspondence relationship to obtain the second oil pump lubrication flow rate.

4. The method according to claim 2, characterized in that, The step of comparing the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each of the other temperatures with the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each of the reference temperatures to obtain the oil pump lubrication flow rate correction factor and solenoid valve control current correction factor includes: For any other temperature, the minimum oil pump lubrication flow rate corresponding to each of the values ​​at the other temperature is compared with the minimum oil pump lubrication flow rate corresponding to each of the values ​​at the reference temperature to obtain an oil pump lubrication flow rate correction factor corresponding to the other temperature; the process is repeated for multiple other temperatures to obtain an oil pump lubrication flow rate correction factor corresponding to each other temperature. For any other temperature, the solenoid valve control current corresponding to each of the other temperatures is compared with the solenoid valve control current corresponding to each of the other temperatures at the reference temperature to obtain a solenoid valve control current correction factor corresponding to the other temperature; this process is repeated for multiple other temperatures to obtain a solenoid valve control current correction factor corresponding to each other temperature.

5. The method according to claim 1, characterized in that, The step of obtaining multiple solenoid valve control currents based on the training dataset, and the first and second correspondences corresponding to each solenoid valve control current, includes: Based on the training dataset, a three-dimensional table is obtained of the first oil circuit lubrication flow data and the second oil circuit lubrication flow data based on the oil pump lubrication flow and the solenoid valve control current. The three-dimensional table is divided into multiple breakpoints according to the solenoid valve control current to obtain multiple solenoid valve control currents, and a third two-dimensional table and a fourth two-dimensional table corresponding to each solenoid valve control current; wherein the third two-dimensional table is the correspondence between the lubrication flow rate of the first oil circuit and the lubrication flow rate of the oil pump, and the fourth two-dimensional table is the correspondence between the lubrication flow rate of the second oil circuit and the lubrication flow rate of the oil pump. The first correspondence is obtained by reversing the coordinates of the third two-dimensional table; the second correspondence is obtained by reversing the coordinates of the fourth two-dimensional table.

6. The method according to claim 1, characterized in that, The acquisition of multiple sets of data on the transmission at a reference temperature to obtain the training dataset includes: Multiple sets of data for the transmission at the reference temperature are obtained to form a training dataset; wherein the multiple sets of data are the lubrication flow rates of the K1 / K2 clutch, the K0 clutch, and the gear shaft system under different operating conditions; the different operating conditions are the different lubrication flow rates of the oil pump and / or the different control currents of the solenoid valves. For each set of data, the lubrication flow rate data of the K0 clutch and the lubrication flow rate data of the gear shaft system in the set of data are fitted to obtain the second oil circuit lubrication flow rate; the lubrication flow rate of the K1 / K2 clutch in the set of training data is used as the first oil circuit lubrication flow rate.

7. The method according to claim 6, characterized in that, The step of fitting the lubrication flow data of the K0 clutch and the lubrication flow data of the gear shaft system to obtain the second oil circuit lubrication flow includes: Get the current transmission oil temperature; Obtain the third correspondence between the reference oil temperature and the fitting parameter factors; The current fitting parameter factor is obtained by searching the third correspondence using the current transmission oil temperature. The first fitted flow rate is obtained by dividing the lubrication flow rate data of the K0 clutch by the current fitting parameter factor; The second fitted flow rate is obtained by dividing the lubrication flow rate data of the gear shaft system by 1 and subtracting the difference of the current fitting parameter factor. The larger value between the first fitted flow rate and the second fitted flow rate is selected to obtain the second oil circuit lubrication flow rate.

8. A method for controlling lubrication flow in a hybrid transmission, characterized in that, include: Obtain the target value pair and the actual operating temperature of the transmission; wherein, the first number in the target value pair represents the target value of the lubrication flow rate of the first oil circuit, and the second number represents the target value of the lubrication flow rate of the second oil circuit; Based on the minimum oil pump lubrication flow rate and solenoid valve control current corresponding to each value pair at the reference temperature obtained by the lubrication flow rate processing method of claim 2, the initial oil pump lubrication flow rate and initial solenoid valve control current corresponding to the target value pair are determined respectively. Based on the oil pump lubrication flow correction factor and the solenoid valve control current correction factor obtained by the lubrication flow processing method of claim 2, the actual correction factor of the oil pump lubrication flow and the actual correction factor of the solenoid valve control current corresponding to the actual operating temperature are determined respectively. The target speed of the oil pump is obtained based on the initial oil pump lubrication flow rate and the actual correction factor of the oil pump lubrication flow rate; the target control current of the solenoid valve is obtained based on the initial solenoid valve control current and the actual correction factor of the solenoid valve control current.

9. The method according to claim 8, characterized in that, The step of obtaining the target oil pump speed based on the initial oil pump lubrication flow rate and the actual oil pump lubrication flow rate correction factor includes: The corrected oil pump lubrication flow rate is obtained by multiplying the initial oil pump lubrication flow rate by the actual oil pump lubrication flow rate correction factor. The target speed of the oil pump is calculated based on the relationship between the lubrication flow rate of the modified oil pump, the design displacement, and the oil pump efficiency.

10. The method according to claim 8, characterized in that, The step of obtaining the target control current of the solenoid valve based on the initial solenoid valve control current and the actual correction factor of the solenoid valve control current includes: The target control current of the solenoid valve is obtained by multiplying the initial solenoid valve control current by the actual correction factor of the solenoid valve control current.

11. A lubrication flow processing device, characterized in that, include: The first acquisition module is used to acquire multiple sets of data of the transmission at the reference temperature to obtain a training dataset, wherein each set of data includes oil pump lubrication flow, solenoid valve control current, first oil circuit lubrication flow and second oil circuit lubrication flow. The preprocessing module is used to obtain multiple solenoid valve control currents and a first correspondence and a second correspondence corresponding to each solenoid valve control current based on the training dataset. The first correspondence reflects the relationship between the oil pump lubrication flow and the first oil circuit lubrication flow, and the second correspondence reflects the relationship between the oil pump lubrication flow and the second oil circuit lubrication flow. The maximum oil pump lubrication flow determination module is used to determine, for any solenoid valve control current, the first oil pump lubrication flow corresponding to the first oil circuit lubrication flow value m according to the first correspondence relationship, and the second oil pump lubrication flow corresponding to the second oil circuit lubrication flow value n according to the second correspondence relationship. The maximum value between the first oil pump lubrication flow and the second oil pump lubrication flow is selected to obtain the maximum oil pump lubrication flow corresponding to the value pair (m, n), which is used as the oil pump lubrication flow that meets the basic working requirements of the transmission under the solenoid valve control current. The minimum oil pump lubrication flow rate determination module is used to iterate through the multiple solenoid valve control currents for any pair of values ​​(m, n), and obtain multiple maximum oil pump lubrication flow rates corresponding to the pair of values ​​(m, n) using the maximum oil pump lubrication flow rate determination module; and select the minimum value among the multiple maximum oil pump lubrication flow rates to obtain the minimum oil pump lubrication flow rate corresponding to the pair of values ​​(m, n). The traversal module is used to traverse the multiple value pairs and obtain the minimum oil pump lubrication flow rate corresponding to each value pair using the maximum oil pump lubrication flow rate determination module and the minimum oil pump lubrication flow rate determination module.

12. A lubrication flow treatment device for a hybrid power transmission, characterized in that, include: The second acquisition module is used to acquire target value pairs and the actual operating temperature of the transmission; wherein, the first number in the target value pair represents the target value of the first oil circuit lubrication flow rate, and the second number represents the target value of the second oil circuit lubrication flow rate; The initial value determination module is used to determine the initial oil pump lubrication flow rate and the initial solenoid valve control current corresponding to the target value pair based on the minimum oil pump lubrication flow rate and the solenoid valve control current corresponding to each value pair at the reference temperature obtained by the lubrication flow rate processing method of claim 2. The correction factor determination module is used to determine the actual correction factor of the oil pump lubrication flow and the actual correction factor of the solenoid valve control current corresponding to the actual operating temperature, based on the oil pump lubrication flow correction factor and the solenoid valve control current correction factor obtained by the lubrication flow processing method of claim 2. The correction module is used to obtain the target speed of the oil pump based on the initial oil pump lubrication flow rate and the actual correction factor of the oil pump lubrication flow rate; and to obtain the target control current of the solenoid valve based on the initial solenoid valve control current and the actual correction factor of the solenoid valve control current.

13. A computer device, characterized in that, include: A memory and a processor are communicatively connected, the memory stores computer instructions, and the processor executes the computer instructions to perform the lubrication flow processing method of any one of claims 1 to 7 and / or the lubrication flow control method of any one of claims 8 to 10 for a hybrid transmission.

14. A transmission system, characterized in that, Includes the computer device as described in claim 13.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the lubrication flow processing method of any one of claims 1 to 7 and / or the hybrid transmission lubrication flow control method of any one of claims 8 to 10.

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