Oil churning loss correction method, device and target vehicle

Abstract

The present invention discloses a method, device and target vehicle for correcting oil churning loss. The method comprises: simulating the oil churning loss of a target transmission device to obtain an oil churning loss simulation value, wherein the oil churning loss simulation value includes simulation values ​​corresponding to multiple preset speeds; obtaining an oil churning loss true value, wherein the oil churning loss true value includes true values ​​corresponding to multiple preset speeds; determining a correction coefficient based on the oil churning loss simulation value and the oil churning loss true value; and correcting the oil churning loss simulation value based on the correction coefficient to obtain a target correction value of the target transmission device. The present invention solves the technical problem of low accuracy in calculating oil churning loss in the related art.

Description

Technical Field

[0001] The present invention relates to the field of intelligent vehicles, and in particular to an oil churning loss correction method, device and target vehicle. Background Art

[0002] Assembly efficiency is an important indicator for evaluating reducers. The higher the assembly efficiency, the lower the loss, which can make the vehicle have a longer driving range. The assembly efficiency of the reducer can be mainly divided into three parts: one is the gear meshing loss, the second is the bearing friction loss, and the third is the assembly oil stirring loss. There are relatively mature empirical formulas to calculate the gear meshing loss and bearing friction loss. Although there are also empirical formulas for calculating the oil stirring loss, the existing empirical formula can only calculate the oil stirring loss of the rotating body immersed in the lubricating oil, and the rotating body not immersed in the lubricating oil is easily ignored. The reducer generally has three or more rotating bodies. When the rotating body immersed in the lubricating oil of the reducer rotates, it will stir the lubricating oil at the bottom, so that the lubricating oil reaches other rotating bodies. This will cause the rotating body not immersed in the lubricating oil to also produce oil stirring loss. Therefore, using the existing empirical formula to calculate the oil stirring loss of the reducer will have a large error.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a method, a device and a target vehicle for correcting oil churning loss, so as to at least solve the technical problem of low accuracy in calculating oil churning loss in the related art.

[0005] According to one aspect of an embodiment of the present invention, a method for correcting oil churning loss is provided, comprising: simulating the oil churning loss of a target transmission device to obtain an oil churning loss simulation value, the oil churning loss simulation value including simulation values ​​corresponding to multiple preset speeds; obtaining an actual value of the oil churning loss, the actual value of the oil churning loss including actual values ​​corresponding to multiple preset speeds; determining a correction coefficient based on the oil churning loss simulation value and the actual value of the oil churning loss; and correcting the oil churning loss simulation value based on the correction coefficient to obtain a target correction value of the target transmission device.

[0006] Optionally, based on the simulation value of the oil stirring loss and the actual value of the oil stirring loss, determining the correction coefficient includes: fitting the simulation value of the oil stirring loss to obtain a first fitting result; fitting the actual value of the oil stirring loss to obtain a second fitting result; and determining the correction coefficient based on the first fitting result and the second fitting result.

[0007] Optionally, the simulation value of the oil stirring loss is fitted to obtain a first fitting result, including: obtaining the natural logarithm of the oil stirring loss simulation value to obtain a first oil stirring loss logarithm; obtaining the natural logarithm of multiple preset speeds to obtain the speed logarithm; fitting the first oil stirring loss logarithm and the speed logarithm to obtain a first fitting straight line; obtaining a first slope and a first position of the first fitting straight line to obtain a first fitting result, wherein the first position is used to characterize the position of the intersection of the first fitting straight line and the preset coordinate axis.

[0008] Optionally, the true value of the oil stirring loss is fitted to obtain a second fitting result, including: obtaining the natural logarithm of the true value of the oil stirring loss to obtain a second logarithm of the oil stirring loss; obtaining the natural logarithm of multiple preset speeds to obtain the logarithm of the speed; fitting the second logarithm of the oil stirring loss and the logarithm of the speed to obtain a second fitting straight line; obtaining the second slope and second position of the second fitting straight line to obtain a second fitting result, wherein the second position is used to characterize the position of the intersection of the second fitting straight line and the preset coordinate axis.

[0009] Optionally, the correction coefficient includes: a first coefficient and a second coefficient, wherein determining the correction coefficient based on the first fitting result and the second fitting result includes: obtaining the quotient of the first position and the second position to obtain the first coefficient; obtaining the quotient of the first slope and the second slope to obtain the second coefficient.

[0010] Optionally, the oil stirring loss simulation value is corrected based on the correction coefficient to obtain a target correction value of the target transmission device, including: obtaining a target speed, the target speed is used to characterize the rotation speed of a rotating body inside the target transmission device; based on the oil stirring loss simulation value, determining a target oil stirring loss corresponding to the target speed; and correcting the target oil stirring loss using a first coefficient and a second coefficient to obtain a target correction value.

[0011] Optionally, the oil stirring loss of the target transmission device is simulated to obtain the oil stirring loss simulation value, including: obtaining an initial model, wherein the initial model is used to characterize the components included in the target transmission device; setting a target fluid on the initial model to obtain a first model, the target fluid including: a fluid domain and fluid parameters; setting a target component that performs rotational motion in the first model to obtain a second model; and simulating the oil stirring loss of the second model to obtain the oil stirring loss simulation value.

[0012] Optionally, when the target component includes: multiple components, the oil stirring loss of the second model is simulated to obtain the oil stirring loss simulation value, including: simulating the oil stirring loss of each component in the second model to obtain the oil stirring loss of each component; obtaining the sum of the oil stirring losses of multiple components to obtain the oil stirring loss simulation value.

[0013] According to another aspect of an embodiment of the present invention, there is also provided an oil stirring loss correction device, comprising: a simulation module, used to simulate the oil stirring loss of a target transmission device to obtain an oil stirring loss simulation value, the oil stirring loss simulation value includes simulation values ​​corresponding to multiple preset speeds; an acquisition module, used to obtain a true value of the oil stirring loss, the true value of the oil stirring loss includes true values ​​corresponding to multiple preset speeds; a determination module, used to determine a correction coefficient based on the oil stirring loss simulation value and the true value of the oil stirring loss; a correction module, used to correct the oil stirring loss simulation value based on the correction coefficient to obtain a target correction value of the target transmission device.

[0014] According to another aspect of an embodiment of the present invention, a target vehicle is also provided, characterized in that it includes: one or more processors; a storage device for storing one or more programs; when the one or more programs are executed by one or more processors, the one or more processors execute any one of the above-mentioned oil stirring loss correction methods.

[0015] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is provided. The non-volatile storage medium includes a stored program, wherein when the program is executed, a processor of a device is controlled to execute any one of the above-mentioned oil stirring loss correction methods.

[0016] Through the above steps, the churning loss of the target transmission device is simulated to obtain a simulation value of the churning loss, which includes simulation values ​​corresponding to multiple preset speeds; the actual value of the churning loss is obtained, which includes actual values ​​corresponding to multiple preset speeds; the correction coefficient is determined based on the simulation value of the churning loss and the actual value of the churning loss; the simulation value of the churning loss is corrected based on the correction coefficient to obtain a target correction value of the target transmission device. It is easy to notice that the correction coefficient can be determined based on the simulation value of the churning loss and the actual value of the churning loss. Further, after obtaining the correction coefficient, the simulation value of the churning loss can be corrected using the correction coefficient, thereby improving the accuracy of the calculation of the churning loss, thereby solving the technical problem of low accuracy of the calculation of the churning loss in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 is a flow chart of a method for correcting oil churning loss according to an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the relationship between oil stirring loss and rotation speed according to an embodiment of the present invention

[0020] Figure 3 is a schematic diagram of a first fitting straight line according to an embodiment of the present invention;

[0021] Figure 4 is a flow chart of oil churning loss correction according to an embodiment of the present invention;

[0022] Figure 5 is a flow chart of a simulation of oil churning loss according to an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of an oil churning loss correction device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Example 1

[0027] According to an embodiment of the present invention, an embodiment of a method for correcting oil churning loss is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0028] Figure 1 FIG. 1 is a flow chart of a method for correcting oil churning loss according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0029] Step S102, simulating the oil churning loss of the target transmission device to obtain an oil churning loss simulation value, wherein the oil churning loss simulation value includes simulation values ​​corresponding to a plurality of preset rotation speeds.

[0030] The above-mentioned target transmission device may be a transmission device that requires oil stirring loss correction. Optionally, the above-mentioned target transmission device may include but is not limited to transmission products such as reducers, drive axles, hybrid-specific transmissions, etc. The present invention is described using a reducer as an example, wherein the reducer may include one or more rotating bodies.

[0031] The above-mentioned oil stirring loss simulation value can be used to represent the simulation of the oil stirring loss of each rotating body inside the target transmission device. Optionally, the oil stirring loss simulation value can be obtained by simulating and calculating each rotating body inside the target transmission device.

[0032] The preset rotation speed may be the rotation speed of a rotating body inside the target transmission device.

[0033] In an optional embodiment, after determining the target transmission device, the rotating body contained in the target transmission device can be 3D modeled, and the built model can be imported into the simulation software for simulation calculation, so as to obtain the simulation value corresponding to each rotating body in the target transmission device. Optionally, the simulation values ​​corresponding to each rotating body in the target transmission device can be added and summed to obtain the simulation value of the oil stirring loss of the target transmission device. The above simulation calculation can be performed using any three-dimensional flow field simulation software, and optionally, particle method three-dimensional flow field simulation software can be used, so that the speed reducer oil stirring loss simulation calculation can be quickly performed, further shortening the simulation cycle.

[0034] Step S104, obtaining the real value of the oil stirring loss, where the real value of the oil stirring loss includes real values ​​corresponding to a plurality of preset rotation speeds.

[0035] The above-mentioned actual value of the oil stirring loss may be the oil stirring loss corresponding to different rotation speeds obtained through testing. Optionally, the actual value of the oil stirring loss may be used to represent the actual oil stirring loss of each rotating body inside the target transmission device.

[0036] In an optional embodiment, each rotating body inside the target transmission device can be tested by any testing method in the relevant scheme to obtain the actual oil stirring loss of each rotating body inside the target transmission device. Optionally, the actual oil stirring loss of each rotating body inside the target transmission device can be added together to obtain the actual value of the oil stirring loss.

[0037] Optionally, after obtaining the above-mentioned true value of the oil churning loss, a linear fitting may be performed on the true value of the oil churning loss, so as to determine the correction coefficient based on the true value of the oil churning loss and the simulated value of the oil churning loss.

[0038] Step S106, determining a correction coefficient based on the simulated value of the oil churning loss and the actual value of the oil churning loss.

[0039] In an optional embodiment, after obtaining the simulated value of the oil stirring loss and the actual value of the oil stirring loss, the obtained simulated value of the oil stirring loss of the rotating body in the target transmission device can be fitted, and the obtained actual value of the oil stirring loss of the rotating body in the target transmission device can be fitted at the same time to obtain two fitting straight lines. Optionally, a correction coefficient can be determined based on the above two fitting straight lines, and the correction coefficient can be used to correct the simulated value of the oil stirring loss.

[0040] In another optional embodiment, after obtaining the simulated value of the oil churning loss and the actual value of the oil churning loss, a correction coefficient can be determined by data comparison, difference calculation, etc. Further, the simulated value of the oil churning loss can be corrected based on the correction coefficient.

[0041] Step S108, correcting the oil stirring loss simulation value based on the correction coefficient to obtain a target correction value of the target transmission device.

[0042] In an optional embodiment, after obtaining the correction coefficient, the correction coefficient can be used to correct the churning loss simulation value of the target transmission device. Optionally, the correction coefficient can be multiplied by the churning loss simulation value of the target transmission device to achieve the correction of the churning loss simulation value. The correction coefficient and the churning loss simulation value can also be summed to achieve the correction of the churning loss simulation value. Further, through the correction, the target transmission device can perform accurate assembly churning loss simulation calculations in the early stage of product design, ensuring that the efficiency of the target transmission device reaches the expected target, and further reducing the increase in design investment cycle and cost caused by unsatisfactory efficiency.

[0043] Through the above steps, the churning loss of the target transmission device is simulated to obtain a simulation value of the churning loss, which includes simulation values ​​corresponding to multiple preset speeds; the actual value of the churning loss is obtained, which includes actual values ​​corresponding to multiple preset speeds; the correction coefficient is determined based on the simulation value of the churning loss and the actual value of the churning loss; the simulation value of the churning loss is corrected based on the correction coefficient to obtain a target correction value of the target transmission device. It is easy to notice that the correction coefficient can be determined based on the simulation value of the churning loss and the actual value of the churning loss. Further, after obtaining the correction coefficient, the simulation value of the churning loss can be corrected using the correction coefficient, thereby improving the accuracy of the calculation of the churning loss, thereby solving the technical problem of low accuracy of the calculation of the churning loss in the related art.

[0044] Optionally, based on the simulation value of the oil stirring loss and the actual value of the oil stirring loss, determining the correction coefficient includes: fitting the simulation value of the oil stirring loss to obtain a first fitting result; fitting the actual value of the oil stirring loss to obtain a second fitting result; and determining the correction coefficient based on the first fitting result and the second fitting result.

[0045] In an optional embodiment, since the obtained simulation value of the oil stirring loss corresponding to the rotating body included in the target transmission device may be multiple points, the above multiple points can be fitted to obtain a first fitting result, wherein the above fitting process can be implemented by directly fitting the data, or performing logarithmic, exponential, power function and other operations on the data and then fitting. In the embodiment of the present invention, the method of performing natural logarithmic operations on the data and then fitting is used as an example for explanation. Similarly, the obtained real value of the oil stirring loss corresponding to the rotating body included in the target transmission device can also be fitted to obtain a second fitting result, wherein the above first fitting result and the second fitting result can be fitting curves obtained by fitting, such as a straight line, a parabola, a hyperbola, etc., or can be parameters of the fitting curve obtained by fitting. For example, taking a straight line as an example, the slope of the straight line and the position of the intersection of the straight line and the Y axis can be used as fitting results. Optionally, the above first fitting result and the second fitting result can be used to determine the correction coefficient.

[0046] Optionally, the simulation value of the oil stirring loss is fitted to obtain a first fitting result, including: obtaining the natural logarithm of the oil stirring loss simulation value to obtain a first oil stirring loss logarithm; obtaining the natural logarithm of multiple preset speeds to obtain the speed logarithm; fitting the first oil stirring loss logarithm and the speed logarithm to obtain a first fitting straight line; obtaining a first slope and a first position of the first fitting straight line to obtain a first fitting result, wherein the first position is used to characterize the position of the intersection of the first fitting straight line and the preset coordinate axis.

[0047] Figure 2 FIG. 1 is a schematic diagram showing the relationship between oil stirring loss and rotation speed according to an embodiment of the present invention. Figure 2 As shown in the figure, the oil churning loss P can be used as the Y axis and the speed ω as the X axis to establish a coordinate system. Figure 2 It can be seen that the oil churning loss increases exponentially with the increase of speed.

[0048] In an optional embodiment, since the data points of the natural logarithm of the oil stirring loss and the natural logarithm of the rotation speed are distributed close to a straight line, the natural logarithm of the oil stirring loss simulation value can be taken to obtain the first oil stirring loss logarithm, and the natural logarithm of the rotation speed of the rotating body included in the target transmission device can be taken to obtain the rotation speed logarithm, and then the first oil stirring loss logarithm and the rotation speed logarithm are fitted to obtain a first fitting straight line. Optionally, the first slope of the first fitting straight line and the position where the first straight line intersects with the Y axis, that is, the first position, can be directly used as the first fitting result.

[0049] Figure 3 is a schematic diagram of a first fitting straight line according to an embodiment of the present invention, such as Figure 3 As shown, the logarithm of the rotation speed can be used as the X-axis, and the logarithm of the first oil stirring loss can be used as the Y-axis to establish a coordinate system, wherein the logarithm of the rotation speed can be expressed as lnP, and the logarithm of the first oil stirring loss can be expressed as lnω. Optionally, fitting the points in the coordinate system can obtain an approximate straight line, and the relationship between all points on the straight line can be expressed by y=a 仿 x+b 仿 To represent, where a 仿 is the first slope, b 仿 For the first position.

[0050] Optionally, the true value of the oil stirring loss is fitted to obtain a second fitting result, including: obtaining the natural logarithm of the true value of the oil stirring loss to obtain a second logarithm of the oil stirring loss; obtaining the natural logarithm of multiple preset speeds to obtain the logarithm of the speed; fitting the second logarithm of the oil stirring loss and the logarithm of the speed to obtain a second fitting straight line; obtaining the second slope and second position of the second fitting straight line to obtain a second fitting result, wherein the second position is used to characterize the position of the intersection of the second fitting straight line and the preset coordinate axis.

[0051] In an optional embodiment, the natural logarithm of the true value of the oil stirring loss can be taken to obtain the second oil stirring loss logarithm, and the natural logarithm of the rotation speed of the rotating body included in the target transmission device can be taken to obtain the rotation speed logarithm, and then the second oil stirring loss logarithm and the rotation speed logarithm are fitted to obtain a second fitting straight line. Optionally, the second slope of the second fitting straight line and the position where the second straight line intersects with the Y axis, that is, the second position, can be directly used as the second fitting result, wherein a can be used 测 represents the second slope, b 测 Indicates the second position.

[0052] Optionally, the correction coefficient includes: a first coefficient and a second coefficient, wherein determining the correction coefficient based on the first fitting result and the second fitting result includes: obtaining the quotient of the first position and the second position to obtain the first coefficient; obtaining the quotient of the first slope and the second slope to obtain the second coefficient.

[0053] In an optional embodiment, after the first slope, the second slope, the first position and the second position are obtained, since different parameters represent different meanings, in order to improve the accuracy of the oil stirring loss correction, different coefficients can be determined based on parameters with different meanings, that is, the formula can be used. To calculate the first coefficient ɑ, use the formula a 测 / a 仿 To calculate the second coefficient β, thus obtaining the final correction coefficient.

[0054] Optionally, the oil stirring loss simulation value is corrected based on the correction coefficient to obtain a target correction value of the target transmission device, including: obtaining a target speed, the target speed is used to characterize the rotation speed of a rotating body inside the target transmission device; based on the oil stirring loss simulation value, determining a target oil stirring loss corresponding to the target speed; and correcting the target oil stirring loss using a first coefficient and a second coefficient to obtain a target correction value.

[0055] The target rotation speed may be a rotation speed of a rotating body inside the target transmission device. Optionally, the target rotation speed may be represented by ω.

[0056] In an optional embodiment, after obtaining the target speed, the first coefficient ɑ, and the second coefficient β, the formula To calculate the target correction value, where P 仿 is the simulation value of oil churning loss, P 修 Optionally, the target speed ω may be corrected based on the second coefficient β first, and then the final calculation result may be corrected based on the first coefficient ɑ, so as to obtain the target correction value.

[0057] Figure 4 is a flow chart of oil stirring loss correction according to an embodiment of the present invention, such as Figure 4 As shown, the method comprises the following steps:

[0058] Step S402, natural logarithm transformation of data;

[0059] Step S404, data linear fitting;

[0060] Step S406, calculation of correction coefficient;

[0061] Step S408, oil stirring loss correction calculation.

[0062] Optionally, simulating the oil stirring loss of the target transmission device to obtain the oil stirring loss simulation value includes: obtaining an initial model, wherein the initial model is used to characterize the components included in the target transmission device; setting a target fluid on the initial model to obtain a first model, and the target fluid includes: a fluid domain and fluid parameters; setting a target component that performs rotational motion in the first model to obtain a second model; simulating the oil stirring loss of the second model to obtain the oil stirring loss simulation value.

[0063] The initial model may be a system 3D model, wherein the model may be used to represent the components included in the target transmission device.

[0064] The target component may be a rotating body in a target transmission device.

[0065] The first model can be obtained by setting a target fluid on the initial model, wherein the target fluid may include a fluid domain and fluid parameters.

[0066] The second model can be obtained by setting the rotating body in the first model.

[0067] In an optional embodiment, the initial model can be first imported into the pre-processing software for pre-processing.

[0068] Figure 5 is a flow chart of a simulation of oil churning loss according to an embodiment of the present invention. Figure 5 As shown, the method comprises the following steps:

[0069] Step S502: model pre-processing.

[0070] Among them, pre-processing can include model integrity check, model grouping simplification, assembly correctness check, closed system model, component export, etc.

[0071] Optionally, the model integrity check can be to check whether there are any missing parts in the system 3D model, if there are any missing parts, they need to be added to make up, check whether there is any surface damage in the system 3D model, if there are any surface defects, they need to be repaired or repaired. Optionally, group simplification can be to group the internal parts of the target transmission device to simplify subsequent operations, wherein the rotating body can be grouped separately, and the 3D model can be appropriately simplified, such as parts that do not affect the simulation process and results can be deleted, and multiple parts with the same speed on the rotating shaft can be merged into one. Optionally, the assembly correctness check can be to check the correctness of the assembly of the system 3D model to ensure that the assembly positions of the matching parts of the system are accurate and there are no interference problems, wherein it can be checked whether there is interference in the gear meshing, and if there is interference, the gear needs to be rotated to eliminate the interference. Optionally, the closed system model can be to isolate the contact between the internal and external air of the system 3D model, and those skilled in the art can manually add closed surfaces to create a closed environment for the system flow field simulation. Optionally, component export can be to export each component of the pre-processed 3D model by group, wherein the component can be in a standard file format (Standard Template Library, also known as stl model file).

[0072] Step S504: Model import.

[0073] The model import may be to import various components of the target transmission device, namely, the stl model file, into the flow field simulation software to perform system flow field simulation.

[0074] Step S506, fluid definition.

[0075] Among them, fluid definition can be divided into fluid domain addition and fluid parameter setting. Optionally, fluid domain addition can be for particle scattering of the system fluid filling area. Through fluid domain addition, the fluid liquid level position or volume can be defined, and an outlet consistent with the sum of all nozzle flow rates can also be defined. Among them, the outlet can be defined at the system oil drain port, so as to ensure the consistency of the system oil volume. Optionally, fluid parameter setting can be for setting the fluid's density, viscosity, surface tension and other property parameters. Different fluid temperatures correspond to different fluid parameters. The fluid parameters corresponding to the oil temperature after the system runs stably can be taken to set the fluid domain parameters.

[0076] Step S508, system motion definition.

[0077] The system motion definition may be to define a rotating body within the system, and may optionally include defining the rotation center coordinates, rotation axis, rotation direction, rotation speed, and the like.

[0078] Step S510, system flow field simulation.

[0079] Among them, the system flow field simulation can be used to set the solution parameters of the system flow field simulation, including optional parameters such as particle radius, gravity direction, solution algorithm type, Courant number, simulation time step, simulation time and data writing time interval. After the solution parameters are set, the system flow field simulation can be run.

[0080] Step S512: simulation result processing.

[0081] The simulation result processing may include processing the flow field simulation results, that is, displaying the oil stirring loss of each rotating body, reading the value of the oil stirring loss of each rotating body after stabilization, and adding up the oil stirring losses of all rotating bodies to obtain the oil stirring loss of the target transmission device.

[0082] Optionally, when the target component includes: multiple components, the oil stirring loss of the second model is simulated to obtain the oil stirring loss simulation value, including: simulating the oil stirring loss of each component in the second model to obtain the oil stirring loss of each component; obtaining the sum of the oil stirring losses of multiple components to obtain the oil stirring loss simulation value.

[0083] In an optional embodiment, when the target transmission device includes multiple rotating bodies, the oil stirring loss of each rotating body can be simulated, the stabilized value of the oil stirring loss of each rotating body is determined as the oil stirring loss of the rotating body, and the oil stirring losses of all rotating bodies are added together to obtain the oil stirring loss of the target transmission device.

[0084] Example 2

[0085] According to an embodiment of the present invention, there is also provided an oil stirring loss correction device, which can execute the vehicle simulation processing method in the above embodiment. Figure 6 Schematic diagram of an oil churning loss correction device according to an embodiment of the present invention. Figure 6 As shown, the device includes the following components:

[0086] A simulation module 602 is used to simulate the oil churning loss of the target transmission device to obtain an oil churning loss simulation value, wherein the oil churning loss simulation value includes simulation values ​​corresponding to a plurality of preset speeds;

[0087] An acquisition module 604 is used to acquire a real value of the oil churning loss, where the real value of the oil churning loss includes real values ​​corresponding to a plurality of preset rotation speeds;

[0088] A determination module 606, configured to determine a correction coefficient based on the simulated value of the churning loss and the actual value of the churning loss;

[0089] The correction module 608 is used to correct the oil stirring loss simulation value based on the correction coefficient to obtain a target correction value of the target transmission device.

[0090] Optionally, the correction module 608 includes: a first fitting unit, used to fit the simulation value of the oil stirring loss to obtain a first fitting result; a second fitting unit, used to fit the actual value of the oil stirring loss to obtain a second fitting result; and a first determination unit, used to determine the correction coefficient based on the first fitting result and the second fitting result.

[0091] Optionally, the first fitting unit includes: a first acquisition subunit, used to acquire the natural logarithm of the oil stirring loss simulation value to obtain a first oil stirring loss logarithm; a second acquisition subunit, used to acquire the natural logarithm of multiple preset speeds to obtain the speed logarithm; a first fitting subunit, used to fit the first oil stirring loss logarithm and the speed logarithm to obtain a first fitting straight line; a third acquisition subunit, used to acquire a first slope and a first position of the first fitting straight line to obtain a first fitting result, wherein the first position is used to characterize the position of the intersection of the first fitting straight line and the preset coordinate axis.

[0092] Optionally, the second fitting unit includes: a fourth acquisition subunit, used to obtain the natural logarithm of the true value of the oil stirring loss to obtain the second oil stirring loss logarithm; a fifth acquisition subunit, used to obtain the natural logarithm of multiple preset speeds to obtain the speed logarithm; a second fitting subunit, used to fit the second oil stirring loss logarithm and the speed logarithm to obtain a second fitting straight line; a sixth acquisition subunit, used to obtain the second slope and second position of the second fitting straight line to obtain a second fitting result, wherein the second position is used to characterize the position of the intersection of the second fitting straight line and the preset coordinate axis.

[0093] Optionally, the determination module 606 includes: a first acquisition unit, used to acquire a quotient of a first position and a second position to obtain a first coefficient; and a second acquisition unit, used to acquire a quotient of a first slope and a second slope to obtain a second coefficient.

[0094] Optionally, the correction module 608 includes: a third acquisition unit, used to obtain a target speed, the target speed is used to characterize the rotation speed of a rotating body inside a target transmission device; a second determination unit, used to determine a target oil stirring loss corresponding to the target speed based on an oil stirring loss simulation value; and a correction unit, used to correct the target oil stirring loss using a first coefficient and a second coefficient to obtain a target correction value.

[0095] Optionally, the simulation module 602 includes: a fourth acquisition unit, used to acquire an initial model, wherein the initial model is used to characterize components included in the target transmission device; a first setting unit, used to set a target fluid on the initial model to obtain a first model, wherein the target fluid includes: a fluid domain and fluid parameters; a second setting unit, used to set a target component performing rotational motion in the first model to obtain a second model; and a simulation unit, used to simulate the oil stirring loss of the second model to obtain an oil stirring loss simulation value.

[0096] Optionally, the simulation unit includes: a simulation subunit, used to simulate the oil stirring loss of each component in the second model to obtain the oil stirring loss of each component; and a seventh acquisition subunit, used to obtain the sum of the oil stirring losses of multiple components to obtain a simulation value of the oil stirring loss.

[0097] Example 3

[0098] According to another aspect of an embodiment of the present invention, a target vehicle is also provided, characterized in that it includes: one or more processors; a storage device for storing one or more programs; when the one or more programs are executed by one or more processors, the one or more processors execute any one of the above-mentioned oil stirring loss correction methods.

[0099] Example 4

[0100] According to an embodiment of the present invention, a non-volatile storage medium is also provided, which includes a stored program, wherein when the program is running, the processor of the device is controlled to execute any one of the above-mentioned vehicle simulation scenario processing methods.

[0101] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0102] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0103] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0104] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0105] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0106] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0107] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for correcting oil churning loss, characterized in that: include: Simulating the oil churning loss of the target transmission device to obtain an oil churning loss simulation value, wherein the oil churning loss simulation value includes simulation values ​​corresponding to a plurality of preset speeds; Acquire a true value of oil churning loss, wherein the true value of oil churning loss includes true values ​​corresponding to the plurality of preset rotational speeds; Determining a correction coefficient based on the simulated value of the oil churning loss and the actual value of the oil churning loss; Correcting the oil churning loss simulation value based on the correction coefficient to obtain a target correction value of the target transmission device; Wherein, determining the correction coefficient based on the simulated value of the oil stirring loss and the real value of the oil stirring loss includes: obtaining the natural logarithm of the simulated value of the oil stirring loss to obtain a first logarithm of the oil stirring loss; obtaining the natural logarithm of the plurality of preset speeds to obtain the logarithm of the speed; fitting the first logarithm of the oil stirring loss and the logarithm of the speed to obtain a first fitting straight line; obtaining a first slope and a first position of the first fitting straight line to obtain a first fitting result, wherein the first position is used to characterize the position of the intersection of the first fitting straight line and the preset coordinate axis; obtaining the natural logarithm of the real value of the oil stirring loss to obtain a second logarithm of the oil stirring loss; obtaining the natural logarithm of the plurality of preset speeds to obtain the logarithm of the speed; fitting the second logarithm of the oil stirring loss and the logarithm of the speed to obtain a second fitting straight line; obtaining a second slope and a second position of the second fitting straight line to obtain a second fitting result, wherein the second position is used to characterize the position of the intersection of the second fitting straight line and the preset coordinate axis; determining the correction coefficient based on the first fitting result and the second fitting result; The correction coefficient includes: a first coefficient and a second coefficient, wherein determining the correction coefficient based on the first fitting result and the second fitting result includes: obtaining a quotient of a first position and a second position to obtain the first coefficient; obtaining a quotient of a first slope and a second slope to obtain the second coefficient.

2. The method according to claim 1, characterized in that The oil stirring loss simulation value is corrected based on the correction coefficient to obtain a target correction value of the target transmission device, including: Obtaining a target rotation speed, wherein the target rotation speed is used to represent the rotation speed of a rotating body inside the target transmission device; determining a target oil stirring loss corresponding to the target speed based on the oil stirring loss simulation value; The target oil stirring loss is corrected by using the first coefficient and the second coefficient to obtain the target correction value.

3. The method according to claim 1, characterized in that The oil churning loss of the target transmission device is simulated to obtain the oil churning loss simulation value, including: Acquire an initial model, wherein the initial model is used to characterize components included in the target transmission device; Setting a target fluid on the initial model to obtain a first model, wherein the target fluid includes: a fluid domain and fluid parameters; Setting a target component that performs rotational motion in the first model to obtain a second model; The oil churning loss of the second model is simulated to obtain the oil churning loss simulation value.

4. The method according to claim 3, characterized in that In the case where the target component includes: a plurality of components, simulating the oil stirring loss of the second model to obtain the oil stirring loss simulation value includes: Simulating the oil churning loss of each component in the second model to obtain the oil churning loss of each component; The sum of the oil stirring losses of the plurality of components is obtained to obtain the oil stirring loss simulation value.

5. An oil churning loss correction device, characterized in that: include: A simulation module, used for simulating the oil churning loss of the target transmission device to obtain an oil churning loss simulation value, wherein the oil churning loss simulation value includes simulation values ​​corresponding to a plurality of preset speeds; An acquisition module, used for acquiring a real value of the oil churning loss, wherein the real value of the oil churning loss includes real values ​​corresponding to the plurality of preset rotational speeds; A determination module, configured to determine a correction coefficient based on the simulated value of the oil churning loss and the actual value of the oil churning loss; a correction module, configured to correct the oil stirring loss simulation value based on the correction coefficient to obtain a target correction value of the target transmission device; wherein the determination module is further used to obtain the natural logarithm of the oil stirring loss simulation value to obtain a first oil stirring loss logarithm; obtain the natural logarithm of the multiple preset speeds to obtain the speed logarithm; fit the first oil stirring loss logarithm and the speed logarithm to obtain a first fitting straight line; obtain a first slope and a first position of the first fitting straight line to obtain a first fitting result, wherein the first position is used to characterize the position of the intersection of the first fitting straight line and the preset coordinate axis; obtain the natural logarithm of the real value of the oil stirring loss to obtain a second oil stirring loss logarithm; obtain the natural logarithm of the multiple preset speeds to obtain the speed logarithm; fit the second oil stirring loss logarithm and the speed logarithm to obtain a second fitting straight line; obtain a second slope and a second position of the second fitting straight line to obtain a second fitting result, wherein the second position is used to characterize the position of the intersection of the second fitting straight line and the preset coordinate axis; determine the correction coefficient based on the first fitting result and the second fitting result; The correction coefficient includes: a first coefficient and a second coefficient, wherein the determination module is further used to obtain a quotient of a first position and a second position to obtain the first coefficient; and to obtain a quotient of a first slope and a second slope to obtain the second coefficient.

6. A target vehicle, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors execute the oil stirring loss correction method according to any one of claims 1 to 4.

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