Lubricating oil surface adjusting device and method of vehicle electric drive system and electronic equipment

Abstract

The invention relates to the technical field of lubricating oil quantity adjustment of electric drive systems, and discloses a lubricating oil surface adjusting device and method of a vehicle electric drive system.The method is applied to the lubricating oil surface adjusting device of the electric drive system.The method comprises the steps that the initial oil surface height of an oil pan is determined according to current working parameters of a drive motor of a vehicle; the current driving posture of the vehicle is obtained, and an oil level correction coefficient is determined according to the current driving posture; wherein a preset corresponding relation exists between the driving posture of the vehicle and the oil level correction coefficient; and correcting the initial oil level height through the oil level correction coefficient to obtain a target oil level height, and adjusting the oil level height of the oil pan to the target oil level height. Therefore, the oil level height of the oil level adjusting device can be adjusted based on the current driving posture so as to adjust the oil level height in the oil pan, and then the requirements for different oil level heights of the oil pan in different scenes are met.

Description

Technical Field

[0001] This application relates to the technical field of lubricating oil quantity regulation for electric drive systems, and particularly to an oil level regulation device, method, and electronic device for a vehicle electric drive system. Background Art

[0002] In electric vehicles, vehicle drive motors use speed reducers to change the output characteristics of the motors. To improve the working environment of the speed reducer, lubricating oil is usually added as a lubricating medium. Especially for oil-cooled motors, the lubricating oil can also act as a cooling medium to reduce the temperatures of the drive motor rotor, stator, and gearbox.

[0003] Under different working conditions and performance requirements of the vehicle, the demand for lubricating oil in the speed reducer may be different. For example, if the ultimate performance of the drive motor is pursued, more lubricating oil needs to be filled. If the churning loss of the gearbox is to be reduced to improve the conversion efficiency of the drive motor, less lubricating oil is needed. Currently, after the lubricating oil filling quantity is determined, the oil quantity generally does not change during subsequent use, and the specific requirements in specific scenarios cannot be met. Summary of the Invention

[0004] In view of the above problems, this application provides an oil level regulation device, method, and electronic device for a vehicle electric drive system, which can adjust the oil level height of the oil level regulation device based on the current driving attitude to achieve the regulation of the oil level height in the oil pan, and further meet the requirements for different oil level heights in the oil pan under different scenarios.

[0005] This application on the one hand provides an oil level regulation method for a vehicle electric drive system. The method is applied to an oil level regulation device of the electric drive system, and the oil level regulation device is used to achieve the regulation of the oil quantity in the oil pan. The method includes: determining the initial oil level height of the oil pan according to the current working parameters of the drive motor of the vehicle; obtaining the current driving attitude of the vehicle, and determining an oil level correction coefficient according to the current driving attitude; wherein, there is a preset corresponding relationship between the driving attitude of the vehicle and the oil level correction coefficient; correcting the initial oil level height through the oil level correction coefficient to obtain the target oil level height, and adjusting the oil level height of the oil level regulation device to the target oil level height.

[0006] In some specific embodiments, the step of obtaining the current driving attitude of the vehicle and determining an oil level correction coefficient according to the current driving attitude includes: obtaining the current pitch angle and the current side slip angle of the vehicle; determining the oil level correction coefficient according to the current pitch angle and the current side slip angle; wherein, there is a preset corresponding relationship between the combination of the pitch angle and the side slip angle and the oil level correction coefficient.

[0007] In some specific embodiments, the step of determining the oil level correction coefficient according to the current pitch angle and the current side slip angle includes: if the current pitch angle is the first pitch angle and the current side slip angle is the first side slip angle, determining that the oil level correction coefficient is the first oil level correction coefficient; if the current pitch angle is the first pitch angle and the current side slip angle is the second side slip angle, determining that the oil level correction coefficient is the second oil level correction coefficient; wherein, the second side slip angle is greater than the first side slip angle, and the degree of correction of the first oil level correction coefficient to the initial oil quantity is less than the degree of correction of the second oil level correction coefficient to the initial oil quantity; if the current pitch angle is the second pitch angle and the current side slip angle is the first side slip angle, determining that the oil level correction coefficient is the third oil level correction coefficient; wherein, the second pitch angle is greater than the first pitch angle, and the degree of correction of the first oil level correction coefficient to the initial oil quantity is less than the degree of correction of the third oil level correction coefficient to the initial oil quantity.

[0008] In some specific embodiments, the step of obtaining the current driving posture of the vehicle and determining the oil level correction coefficient according to the current driving posture includes: detecting that the current driving road of the vehicle is a preset ramp, and determining that the current driving posture of the vehicle is a front-back tilt posture; determining the current slope of the driving road in the front-back tilt posture of the vehicle, and determining the oil level correction coefficient according to the current slope; wherein, there is a preset corresponding relationship between the slope of the driving road and the oil level correction coefficient.

[0009] In some specific embodiments, the step of obtaining the current driving posture of the vehicle and determining the oil level correction coefficient according to the current driving posture includes: detecting that the current driving road of the vehicle is a preset curve, and determining that the current driving posture of the vehicle is a left-right tilt posture; determining the oil level correction coefficient according to the left-right tilt degree of the vehicle in the left-right tilt posture; wherein, there is a preset corresponding relationship between the left-right tilt degree of the vehicle and the oil level correction coefficient.

[0010] In some specific embodiments, the step of determining the oil level correction coefficient according to the left-right tilt degree of the vehicle in the left-right tilt posture includes: obtaining the curve radian of the preset curve of the vehicle in the left-right tilt posture and the current vehicle speed; determining the preset left-right tilt degree of the vehicle in the left-right tilt posture according to the curve radian and the current vehicle speed; wherein, there is a preset corresponding relationship between the combination of the curve radian and the vehicle speed and the preset left-right tilt degree.

[0011] In some specific embodiments, the step of determining the initial oil level height of the oil pan according to the current working parameters of the driving motor of the vehicle includes: obtaining the current rotation speed and the current torque of the driving motor of the vehicle; determining the initial oil level height of the oil pan according to the current rotation speed and the current torque; wherein, there is a preset corresponding relationship between the combination of the rotation speed and the torque of the driving motor and the initial oil level height.

[0012] In some specific embodiments, the step of determining the initial oil level height of the oil pan according to the current rotational speed and the current torque includes: if the current rotational speed is the first rotational speed and the current torque is the first torque, determining that the initial oil level height of the oil pan is the first initial oil level height; if the current rotational speed is the first rotational speed and the current torque is the second torque, determining that the initial oil level height of the oil pan is the second initial oil level height; wherein, the second torque is greater than the first torque, and the second initial oil level height is greater than the first initial oil level height; if the current rotational speed is the second rotational speed and the current torque is the first torque, determining that the initial oil level height of the oil pan is the third initial oil level height; wherein, the second rotational speed is greater than the first rotational speed, and the third initial oil level height is greater than the first initial oil level height.

[0013] On the other hand, the present application provides a lubricating oil level adjusting device for a vehicle electric drive system, including: an oil storage member communicated with the oil pan of the electric drive system, and lubricating oil is stored in the oil storage member and the oil pan; a piston disposed in the oil storage member, and the piston can move in the oil storage member; a driving member connected to the piston, and the driving member is used to drive the piston to move in the oil storage member to adjust the amount of oil in the oil storage member, so as to adjust the oil level height of the oil pan, and further adjust the amount of oil in the oil pan; a control device, and the control device is used to execute the lubricating oil level adjusting method of the vehicle electric drive system in any one of the above to adjust the oil level height of the oil pan.

[0014] On another aspect, the present application provides an electronic device, including: a processor; a memory for storing a computer program, and when the computer program is executed by the processor, it implements the lubricating oil level adjusting method of the vehicle electric drive system in any one of the above.

[0015] The beneficial technical effects that the present application at least has: Based on the lubricating oil level adjusting device, method and electronic device of the vehicle electric drive system provided by the present application, this method is applied to the lubricating oil level adjusting device of the electric drive system, and the lubricating oil level adjusting device is used to adjust the amount of oil in the oil pan. This method includes: determining the initial oil level height of the oil pan according to the current working parameters of the driving motor of the vehicle; obtaining the current driving posture of the vehicle, and determining an oil level correction coefficient according to the current driving posture; wherein, there is a preset corresponding relationship between the driving posture of the vehicle and the oil level correction coefficient; correcting the initial oil level height by the oil level correction coefficient to obtain a target oil level height, and adjusting the oil level height of the oil pan to the target oil level height. Therefore, it is possible to adjust the oil level height of the oil level adjusting device based on the current driving posture, so as to adjust the oil level height in the oil pan, and further meet the requirements for different oil level heights in the oil pan in different scenarios.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to be able to understand the technical means of the embodiment of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are only used to illustrate the embodiments and are not considered as a limitation to the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the lubricating oil level adjusting device of the vehicle electric drive system provided by the present application;

[0019] Figure 2 is a schematic flowchart of an embodiment of the lubricating oil level adjusting method of the vehicle electric drive system provided by the present application;

[0020] Figure 3 is a schematic flowchart of another embodiment of the lubricating oil level adjusting method of the vehicle electric drive system provided by the present application;

[0021] Figure 4 is a schematic flowchart of still another embodiment of the lubricating oil level adjusting method of the vehicle electric drive system provided by the present application;

[0022] Figure 5 is a schematic flowchart of still another embodiment of the lubricating oil level adjusting method of the vehicle electric drive system provided by the present application;

[0023] Figure 6 is a schematic flowchart of still another embodiment of the lubricating oil level adjusting method of the vehicle electric drive system provided by the present application;

[0024] Figure 7 is a schematic flowchart of still another embodiment of the lubricating oil level adjusting method of the vehicle electric drive system provided by the present application;

[0025] Figure 8 is a schematic flowchart of still another embodiment of the lubricating oil level adjusting method of the vehicle electric drive system provided by the present application;

[0026] Figure 9 is a schematic flowchart of still another embodiment of the lubricating oil level adjusting method of the vehicle electric drive system provided by the present application;

[0027] Figure 10 is a schematic structural framework diagram of an embodiment of the electronic device provided by the present application.

[0028] Description of the reference numerals: The lubricating oil level adjusting device 100 of the vehicle electric drive system, the oil storage member 10, the piston 20, the driving member 30, the oil pan 50, the structure 60 to be lubricated and cooled, and the connecting structure 70. Detailed implementation manners

[0029] Hereinafter, the exemplary embodiments of the present application will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0030] If there are descriptions involving "first", "second", etc. in the embodiments of the present application, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. Additionally, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes the solution of A, or the solution of B, or the solution where A and B are satisfied simultaneously. Moreover, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0031] In a first aspect of the present application, a lubricating oil level adjusting device 100 for a vehicle electric drive system is provided. Figure 1 It is a schematic structural diagram of the lubricating oil level adjusting device 100 for the vehicle electric drive system provided by the present application.

[0032] Combined with Figure 1 , the lubricating oil level adjusting device 100 of the vehicle electric drive system includes an oil storage member 10, a piston 20, and a driving member 30. The piston 20 is disposed within the oil storage member 10, the driving member 30 is connected to the piston 20, the oil storage member 10 is in communication with the oil pan 50 of the electric drive system, and lubricating oil is stored within the oil storage member 10 and the oil pan 50.

[0033] Among them, the piston 20 can move within the oil storage member 10, and the driving member 30 is used to drive the piston 20 to move within the oil storage member 10 to adjust the amount of oil within the oil storage member 10. Since the oil storage member 10 communicates with the oil sump 50, when adjusting the amount of oil in the oil storage member 10, it is possible to adjust the amount of oil in the oil sump 50, that is, it is possible to adjust the height of the oil level in the oil sump. It should be understood that due to the different postures of the vehicle during driving, the oil level is not necessarily horizontal, and the oil level height in the oil sump referred to in this application is the average height of the oil level in the oil sump.

[0034] It should be understood that the oil sump 50 can be the bottom part of the transmission of the electric drive system, and this part stores lubricating oil to achieve lubrication and cooling of the structure 60 to be lubricated and cooled, thereby ensuring the normal operation of the electric drive system. Among them, the structure 60 to be lubricated and cooled can be gears, motor rotors, stators, etc.

[0035] Specifically, a connection structure 70 can be provided between the piston 20 and the driving member 30. The driving member 30 and the piston 20 can be connected through the connection structure 70, and the driving member 30 can directly drive the connecting member to indirectly drive the piston 20. Among them, the driving member 30 can be a driving motor, and the connection structure 70 can be a connecting rod. The driving motor drives the connecting rod to move along its length direction, and drives the piston 20 to move along the length direction of the connecting rod, thereby realizing the adjustment of the amount of oil in the oil storage member 10.

[0036] Furthermore, for a more specific setting method of the lubricating oil level adjustment device 100 of the vehicle electric drive system, in some specific embodiments, the height direction of the oil storage member 10 is consistent with the height direction of the vehicle, and the lubricating oil in the oil storage member 10 is located below the piston 20. At this time, the oil storage member 10 and the oil sump 50 can be arranged adjacent to each other in the horizontal direction. The oil storage member 10 can be arranged in a substantially cylindrical shape, so that the lubricating oil is located in the lower part of the cylindrical oil storage member 10 and below the piston 20. And the driving member 30 can be arranged above the connection structure 70 and at the top of the oil storage member 10. At this time, the bottom of the oil storage member 10 can be connected to the bottom of the oil sump 50, thereby realizing good intercommunication of the lubricating oil between the oil storage member 10 and the oil sump 50.

[0037] Combined with Figure 1, at this time, the piston 20 can move along the height direction of the oil storage member 10, and when the piston 20 moves downward, it compresses the oil storage space of the oil storage member 10, so that the lubricating oil in the oil storage member 10 flows into the oil pan 50, reducing the amount of lubricating oil in the oil storage member 10, and at the same time, the oil level height of the lubricating oil in the oil pan 50 rises. On the contrary, when the piston 20 moves upward, it will increase the oil storage space of the oil storage member 10, and the lubricating oil in the oil pan 50 will enter the oil storage member 10 due to the liquid level difference or the suction force caused by the movement of the piston 20, so that the amount of lubricating oil in the oil storage member 10 increases, and the oil level height of the lubricating oil in the oil pan 50 decreases.

[0038] Furthermore, the lubricating oil level adjusting device 100 of the vehicle electric drive system further includes a control device (not shown in the figure), and the control device is used to execute the lubricating oil level adjusting method of the vehicle electric drive system in any of the following embodiments, so as to realize the adjustment of the oil level height of the oil pan.

[0039] The second aspect of the present application provides a lubricating oil level adjusting method for a vehicle electric drive system. This method can be applied to the lubricating oil level adjusting device 100 of the vehicle electric drive system in any of the above embodiments. This method is used to realize the adjustment of the oil level height of the lubricating oil in the oil pan, so as to meet the specific requirements for different oil level heights in different scenarios.

[0040] Figure 2 is a schematic flow chart of an embodiment of the lubricating oil level adjusting method for a vehicle electric drive system provided by the present application. Combining Figure 2 , this method includes the following steps:

[0041] S101: Determine the initial oil level height of the oil pan according to the current working parameters of the drive motor of the vehicle.

[0042] It should be understood that when the drive motor is in different working states, the requirements for lubrication and cooling are generally different, that is, the requirements for the oil level height of the lubricating oil in the oil pan are different. The initial oil level height is the oil level height of the oil pan corresponding to the drive motor in the current working state (which can be the average oil level height), and this corresponding relationship can be set in advance.

[0043] Since the current working parameters of the drive motor can reflect the current working state of the drive motor, the initial oil level height of the oil level adjusting device can be directly determined according to the current working parameters. Among them, a preset corresponding relationship between the working parameters of the drive motor and the initial oil level height can be set, so that after obtaining the current working parameters, the initial oil level height can be directly determined according to the preset corresponding relationship.

[0044] S102: Obtain the current driving attitude of the vehicle, and determine the oil level correction coefficient according to the current driving attitude; wherein, there is a preset corresponding relationship between the driving attitude of the vehicle and the oil level correction coefficient.

[0045] It should be understood that the current driving attitude of the vehicle will require different oil level heights in the oil pan. For example, when the amount of oil in the oil pan remains unchanged, the driving attitude of the vehicle may cause the oil level to tilt, which may cause some components that need to be cooled and lubricated in the electric drive system to not be cooled and lubricated, affecting the working state of the electric drive system. At this time, generally a higher oil level height in the oil pan is required to ensure that all components can be cooled and lubricated well.

[0046] Therefore, this embodiment will further consider the influence of the vehicle driving attitude on the oil quantity requirement. This step will obtain the current driving attitude of the vehicle. Among them, the vehicle can obtain the current driving attitude through a sensing device, a camera device, etc., and no specific limitation is made here.

[0047] Specifically, the degree of oil level tilt brought about by different current driving attitudes is generally different, and the greater the degree of oil level tilt, the higher the required oil level height generally is to ensure that all components can be cooled and lubricated well. Therefore, this embodiment determines the corresponding oil level correction coefficient according to the current driving attitude, so that the oil level correction coefficient is adapted to the current driving attitude, and then an adapted correction effect can be achieved on the initial oil quantity in the subsequent steps.

[0048] In addition, the execution order of obtaining this step is not affected by the step sorting. For example, this step can be executed together with step S101, and no specific limitation is made.

[0049] S103: Correct the initial oil level height through the oil level correction coefficient to obtain the target oil level height, and adjust the oil level height of the oil pan to the target oil level height.

[0050] The oil level correction coefficient obtained in the above steps is adapted to the current driving attitude of the vehicle. This step corrects the initial oil level height through the oil level correction coefficient, fully and appropriately considering the influence of the current driving attitude. At this time, the obtained target oil level height fully considers the current working state of the drive motor and the influence of the current driving attitude of the vehicle, so that when the oil level height of the oil pan is at the target oil level height, the specific lubrication and cooling requirements in the current state can be met.

[0051] It should be understood that in the specific adjustment process, the current oil level height of the oil pan will be compared with the target oil level height. If the two are the same, no adjustment is required. If the two are different, the oil level height of the oil pan needs to be adjusted to the target oil level height.

[0052] Among them, for the oil level correction coefficient, it can be an oil quantity parameter. In this case, the target oil level height can be obtained based on the initial oil level height and this oil quantity parameter. The oil quantity correction parameter can also be just a coefficient. In this case, the target oil quantity can be obtained based on the initial oil quantity and this coefficient. For example, when the oil level correction coefficient is an oil quantity parameter, the oil level height of the oil pan is used as the oil level correction coefficient, and the initial oil level height is 0.8 m. The oil level correction coefficient can be 0.1 m. In this case, the sum of the initial oil level height and the oil level correction coefficient, which is 0.9 m, can be used as the target oil level height. When the oil level correction coefficient is a coefficient, the oil level correction coefficient can be 1.1, and the initial oil level height is 0.8 m. In this case, the product of the initial oil level height and the oil level correction coefficient, which is 0.88 m, can be used as the target oil level height.

[0053] Figure 3 It is a schematic flowchart of another embodiment of the lubricating oil level adjustment method for the vehicle electric drive system provided by this application.

[0054] Combined with Figure 3 , in some specific embodiments, the step of obtaining the current driving attitude of the vehicle and determining the oil level correction coefficient according to the current driving attitude, that is, the above step S102, includes:

[0055] S201: Obtain the current pitch angle and the current roll angle of the vehicle.

[0056] It should be understood that the pitch angle of the vehicle is the inclination angle of the vehicle in its front-rear direction, including the front inclination angle and the rear inclination angle. The roll angle of the vehicle is the inclination angle of the vehicle in its left-right direction, including the left inclination angle and the right inclination angle. The current pitch angle and the current roll angle of the vehicle actually reflect the current driving attitude of the vehicle. That is, obtaining the current pitch angle and the current roll angle of the vehicle is actually obtaining the current driving attitude of the vehicle.

[0057] In some specific application scenarios, the current pitch angle and the current roll angle of the vehicle can be obtained through relevant sensors set on the vehicle, but it is not limited thereto.

[0058] S202: Determine the oil level correction coefficient according to the current pitch angle and the current roll angle; among them, there is a preset corresponding relationship between the combination of the pitch angle and the roll angle and the oil level correction coefficient.

[0059] Determining the oil level correction coefficient according to the current pitch angle and the current roll angle is actually determining the oil level correction coefficient according to the current driving attitude of the vehicle.

[0060] Among them, the combination of the pitch angle and the roll angle and the oil level correction coefficient are pre-calibrated through tests, etc., so that the oil level correction coefficient under a specific combination of the pitch angle and the roll angle can meet the correction requirements for the initial oil level height under the specific combination of the pitch angle and the roll angle.

[0061] Therefore, in this embodiment, the oil level correction coefficient is determined based on the pitch angle and the sideslip angle, which can quantify and accurately determine the oil level correction coefficient according to the specific attitude of the vehicle, making the oil level of the oil pan more in line with the current requirements.

[0062] Figure 4 It is a schematic flowchart of another embodiment of the lubricating oil level adjustment method for a vehicle electric drive system provided by the present application.

[0063] Combined with Figure 4 , in some specific embodiments, the step of determining the oil level correction coefficient according to the current pitch angle and the current sideslip angle, that is, the above step S202, includes:

[0064] S301: If the current pitch angle is the first pitch angle and the current sideslip angle is the first sideslip angle, then determine that the oil level correction coefficient is the first oil level correction coefficient.

[0065] At this time, there is a preset corresponding relationship between the combination of the first pitch angle and the first sideslip angle and the first oil level correction coefficient.

[0066] S302: If the current pitch angle is the first pitch angle and the current sideslip angle is the second sideslip angle, then determine that the oil level correction coefficient is the second oil level correction coefficient; wherein, the second sideslip angle is greater than the first sideslip angle, and the correction degree of the first oil level correction coefficient for the initial oil quantity is less than the correction degree of the second oil level correction coefficient for the initial oil quantity.

[0067] At this time, there is a preset corresponding relationship between the combination of the first pitch angle and the second sideslip angle and the second oil level correction coefficient.

[0068] The combinations corresponding to the first oil level correction coefficient and the second oil level correction coefficient only differ in the sideslip angle, and when the second sideslip angle is greater than the first sideslip angle, the second oil level correction coefficient will be greater than the first oil level correction coefficient. Therefore, in the corresponding relationship between the combination of the pitch angle and the sideslip angle and the oil level correction coefficient, if the pitch angle is constant, when the sideslip angle increases, the correction degree of the corresponding oil level correction coefficient for the initial oil level height will increase, and the oil quantity of the oil storage part corresponding to the final target oil level will decrease, resulting in an increase in the oil quantity in the oil pan.

[0069] S303: If the current pitch angle is the second pitch angle and the current sideslip angle is the first sideslip angle, then determine that the oil level correction coefficient is the third oil level correction coefficient; wherein, the second pitch angle is greater than the first pitch angle, and the correction degree of the first oil level correction coefficient for the initial oil level height is less than the correction degree of the third oil level correction coefficient for the initial oil level height.

[0070] At this time, there is a preset corresponding relationship between the combination of the second pitch angle and the first sideslip angle and the third oil level correction coefficient.

[0071] The combination corresponding to the first oil level correction coefficient and the third oil level correction coefficient only has a difference in pitch angle. When the second pitch angle is greater than the first pitch angle, the third oil level correction coefficient will be greater than the first oil level correction coefficient. Therefore, in the correspondence between the combination of pitch angle and sideslip angle and the oil level correction coefficient, if the sideslip angle is constant and the pitch angle increases, the degree of correction of the corresponding oil level correction coefficient to the initial oil level height will increase.

[0072] Figure 5 It is a schematic flowchart of another embodiment of the lubricating oil level adjustment method for the vehicle electric drive system provided by the present application.

[0073] Combined with Figure 5 , in some specific embodiments, the step of obtaining the current driving posture of the vehicle and determining the oil level correction coefficient according to the current driving posture, that is, the above-mentioned step S104, includes:

[0074] S401: If it is detected that the current driving road of the vehicle is a preset ramp, it is determined that the current driving posture of the vehicle is a front-back tilt posture.

[0075] The parameters of the preset ramp can be set in advance. When the slope and length of the ramp both meet certain values, the ramp can be used as the preset ramp. When the vehicle is driving on the preset ramp, the driving posture of the vehicle will change compared with driving on a flat road, and the specific change is a front-back tilt posture. Therefore, when the vehicle is driving on the preset ramp, it is determined that the current driving posture of the vehicle is a front-back tilt posture.

[0076] S402: Determine the current slope of the driving road of the vehicle in the front-back tilt posture, and determine the oil level correction coefficient according to the current slope; wherein, there is a preset correspondence between the slope of the driving road and the oil level correction coefficient.

[0077] When the vehicle is in a front-back tilt state, it will cause the oil level in the oil pan to tilt, which will affect the requirement for the oil level height. Moreover, when the slope of the driving road is different, the degree of oil level tilt will be different, and the influence on the requirement for the oil level height will also be different.

[0078] Therefore, in this embodiment, the oil level correction coefficient will be determined through the current slope of the driving road, so that the degree of correction of the oil level correction coefficient to the initial oil volume can meet the specific tilt degree of the driving road, so as to achieve precise adjustment of the initial oil level height.

[0079] Among them, when the slope of the driving road is larger, the degree of correction of the corresponding oil level correction coefficient to the initial oil level height is larger, specifically manifested as the oil level height of the oil pan corresponding to the corrected target oil level height is higher.

[0080] Figure 6It is a schematic flowchart of another embodiment of the lubricating oil level adjustment method for a vehicle electric drive system provided by this application.

[0081] Combined with Figure 6 , in some specific embodiments, the step of obtaining the current driving posture of the vehicle and determining the oil level correction coefficient according to the current driving posture, that is, the above step S102, includes:

[0082] S501: If it is detected that the current driving road of the vehicle is a preset curve, it is determined that the current driving posture of the vehicle is a left-right tilt posture.

[0083] When the curvature and length of the curve meet certain requirements, this curve can be used as a preset curve. When the vehicle is driving on a preset curve, the vehicle will have a certain tilt in its left-right direction. At this time, the current driving posture of the vehicle is used as the left-right tilt posture.

[0084] S502: Determine the oil level correction coefficient according to the left-right tilt degree of the vehicle in the left-right tilt posture; wherein, there is a preset corresponding relationship between the left-right tilt degree of the vehicle and the oil level correction coefficient.

[0085] It should be understood that when the vehicle is in the left-right tilt posture, the oil level in the oil pan will be tilted, which will affect the requirement for the oil level height in the oil pan. Moreover, when the tilt degree of the vehicle in the left-right tilt posture is different, the influence on the oil level height requirement of the oil pan is different.

[0086] Because, in this embodiment, in order to make the oil level correction coefficient more in line with the actual requirements, the oil level correction coefficient will be specifically determined according to the left-right tilt degree, so that the finally obtained target oil quantity is more in line with the specific tilt degree of the vehicle.

[0087] Among them, the specific relationship between the left-right tilt degree of the vehicle and the oil level correction coefficient can be: when the left-right tilt degree of the vehicle increases, the correction degree of the oil level correction coefficient for the initial oil level height increases, and finally the oil level height in the oil pan corresponding to the determined target oil level height increases.

[0088] Figure 7 It is a schematic flowchart of another embodiment of the lubricating oil level adjustment method for a vehicle electric drive system provided by this application.

[0089] Combined with Figure 7 , in some specific embodiments, the step of determining the oil level correction coefficient according to the left-right tilt degree of the vehicle in the left-right tilt posture, that is, the above step S502, includes:

[0090] S601: Obtain the curve curvature of the preset curve of the vehicle in the left-right tilt posture and the current vehicle speed.

[0091] It should be understood that when the vehicle is in a left - right tilting posture while driving on a preset curve, the degree of left - right tilting of the vehicle is actually related to the curve radian of the curve and the current vehicle speed. Therefore, in this embodiment, the curve radian and the current vehicle speed in the left - right tilting posture are obtained to determine the degree of left - right tilting of the vehicle.

[0092] S602: Determine the preset left - right tilting degree of the vehicle in the left - right tilting posture according to the curve radian and the current vehicle speed; wherein, there is a preset corresponding relationship between the combination of the curve radian and the vehicle speed and the preset left - right tilting degree.

[0093] Among them, the relationship between the combination of the curve radian and the vehicle speed and the preset left - right tilting degree can be obtained in advance through experiments and the historical driving data of the vehicle. When the vehicle is in a left - right tilting posture while driving on a preset curve, the preset left - right tilting degree can be determined through the curve radian, the current vehicle speed, and the preset corresponding relationship.

[0094] It should be understood that the preset tilting degree can correspond to a range of left - right tilting angles of a vehicle. When the curve radian is the same, when the current vehicle speed of the vehicle increases, the corresponding preset left - right tilting degree generally increases or remains unchanged.

[0095] Combining the above content, the above - mentioned embodiment provides a method for determining the oil - level correction coefficient through the pitch angle and the tilt angle of the vehicle. This method is relatively direct and can quantitatively and accurately determine the oil - level correction coefficient. The above - mentioned embodiment also provides a method for determining the oil - level correction coefficient according to the slope of the vehicle driving road, which can determine the oil - level correction coefficient by measuring the road slope and meets the specific requirements in some scenarios. The above - mentioned embodiment also provides a method for determining the oil - level correction coefficient through the left - right tilting degree of the vehicle, and further quantitatively determines the oil - level correction coefficient according to the vehicle speed and the curve radian, which can meet the requirements in some specific scenarios. It should be understood that the methods for determining the oil - level correction coefficient provided in the above - mentioned embodiments can be applied alone or jointly. When applied jointly, the determined oil - level correction coefficients can be jointly referred to determine the final oil - level correction coefficient.

[0096] Figure 8 It is a schematic flowchart of another embodiment of the lubricating oil - level adjustment method for the vehicle electric drive system provided by the present application.

[0097] Combined with Figure 8 , the step of determining the initial oil - level height of the oil pan according to the current working parameters of the drive motor of the vehicle includes:

[0098] S701: Obtain the current rotational speed and the current torque of the drive motor of the vehicle.

[0099] This embodiment further defines the steps for determining the initial oil level height, that is, taking the current rotational speed and current torque of the drive motor as the current operating parameters. At this time, the current rotational speed and current torque can well reflect the current operating state of the drive motor.

[0100] S702: Determine the initial oil level height of the oil pan according to the current rotational speed and the current torque; wherein, there is a preset corresponding relationship between the combination of the rotational speed and torque of the drive motor and the initial oil level height.

[0101] After obtaining the current rotational speed and the current torque of the drive motor of the vehicle, further determine the initial oil level height of the oil pan according to the current rotational speed, the current torque, and the preset corresponding relationship. Among them, the preset corresponding relationship between the combination of the rotational speed and torque of the drive motor and the initial oil level height can be obtained through calibration in advance according to actual needs.

[0102] Figure 9 It is a schematic flowchart of another embodiment of the lubricating oil level adjustment method for the vehicle electric drive system provided by this application.

[0103] Combined with Figure 9 , in some specific embodiments, the step of determining the initial oil level height of the oil pan according to the current rotational speed and the current torque includes:

[0104] S801: If the current rotational speed is the first rotational speed and the current torque is the first torque, then determine that the initial oil level height of the oil pan is the first initial oil level height.

[0105] At this time, in the preset corresponding relationship between the combination of the rotational speed and torque and the initial oil level height, the initial oil level height corresponding to the first rotational speed and the first torque is the first initial oil level height.

[0106] S802: If the current rotational speed is the first rotational speed and the current torque is the second torque, then determine that the initial oil level height of the oil pan is the second initial oil level height; wherein, the second torque is greater than the first torque, and the second initial oil level height is greater than the first initial oil level height.

[0107] At this time, in the preset corresponding relationship between the combination of the rotational speed and torque and the initial oil level height, the initial oil level height corresponding to the first rotational speed and the second torque is the second initial oil level height.

[0108] The combination of the rotational speed and torque corresponding to the first initial oil level height and the second initial oil level height only has differences in torque, and when the second torque is greater than the first torque, the second initial oil level height is greater than the first initial oil level height. At this time, in the preset corresponding relationship between the combination of the rotational speed and torque and the initial oil storage amount, if the rotational speed remains unchanged and the torque increases, the oil level height in the oil pan rises.

[0109] S803: If the current rotational speed is the second rotational speed and the current torque is the first torque, determine that the initial oil level height of the oil pan is the third initial oil level height; wherein, the second rotational speed is greater than the first rotational speed, and the third initial oil level height is greater than the first initial oil level height.

[0110] At this time, in the preset correspondence between the combination of rotational speed and torque and the initial oil level height, the initial oil level height corresponding to the second rotational speed and the first torque is the third initial oil level height.

[0111] Among them, the combinations of rotational speed and torque corresponding to the first initial oil level height and the third initial oil level height only differ in rotational speed, and when the second rotational speed is greater than the first torque, the third initial oil level height is less than the first initial oil level height. At this time, in the preset correspondence between the combination of rotational speed and torque and the initial oil storage amount, if the torque remains unchanged and the rotational speed increases, the oil level height in the oil pan rises.

[0112] The third aspect of the present application provides an electronic device, including: a processor; a memory for storing a computer program, and when the computer program is executed by the processor, it implements the lubricating oil level adjustment method of the vehicle electric drive system in any of the above embodiments.

[0113] Figure 10 It is a schematic structural framework diagram of an embodiment of the electronic device 500 provided by the present application.

[0114] In some specific embodiments, the electronic device 500 includes a central processing unit (CPU) 501 and a read-only memory (ROM) 502. The central processing unit 501 is the processor, and the read-only memory (ROM) 502 is the memory. The central processing unit 501 can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage section 508 into the random access memory (RAM) 503, such as executing the method in the above embodiments. In the RAM 503, various programs and data required for system operation are also stored. The CPU 501, ROM 502, and RAM 503 are connected to each other through a bus 504. The input / output (I / O) interface 505 is also connected to the bus 504.

[0115] The following components are connected to the I / O interface 505: an input part 506 including a keyboard, a mouse, etc.; an output part 507 including, for example, a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage part 508 including a hard disk, etc.; and a communication part 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication part 509 performs communication processing via a network such as the Internet. The drive 510 is also connected to the I / O interface 505 as required. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as required so that a computer program read from it can be installed into the storage part 508 as required.

[0116] Specifically, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 509, and / or installed from the removable medium 511. When the computer program is executed by the central processing unit (CPU) 501, various functions defined in the system of the present application are executed.

[0117] In summary, based on the lubricating oil level adjusting device, method and electronic device for a vehicle electric drive system provided by the present application, this method is applied to the lubricating oil level adjusting device of the electric drive system, and the lubricating oil level adjusting device is used to adjust the oil quantity in the oil pan. The method includes: determining the initial oil level height of the oil pan according to the current working parameters of the drive motor of the vehicle; obtaining the current driving attitude of the vehicle, and determining an oil level correction coefficient according to the current driving attitude; wherein, there is a preset corresponding relationship between the driving attitude of the vehicle and the oil level correction coefficient; correcting the initial oil level height by the oil level correction coefficient to obtain a target oil level height, and adjusting the oil level height of the oil pan to the target oil level height. Therefore, it is possible to adjust the oil level height of the oil pan based on the current driving attitude, so as to adjust the oil level height in the oil pan, and further meet the requirements for different oil level heights of the oil pan in different scenarios.

[0118] The above content is only a preferred exemplary embodiment of the present application and is not used to limit the implementation of the present application. Those of ordinary skill in the art can easily make corresponding changes or modifications according to the main idea and spirit of the present application. Therefore, the protection scope of the present application should be subject to the protection scope required by the claims.

Claims

1. A method for adjusting the lubricating oil level of a vehicle electric drive system, characterized in that: The method is applied to a lubricating oil level regulating device of an electric drive system, wherein the lubricating oil level regulating device is used to adjust the oil level in the oil pan, and the method comprises: Determining an initial oil level of the oil pan according to current operating parameters of the drive motor of the vehicle; Acquire the current driving posture of the vehicle, and determine the oil level correction coefficient according to the current driving posture; wherein there is a preset corresponding relationship between the driving posture of the vehicle and the oil level correction coefficient; The initial oil level is corrected by the oil level correction coefficient to obtain a target oil level, and the oil level of the oil pan is adjusted to the target oil level.

2. The lubricating oil level adjustment method according to claim 1, characterized in that: The step of obtaining the current driving posture of the vehicle and determining the oil level correction coefficient according to the current driving posture comprises: Obtaining a current pitch angle and a current sideslip angle of the vehicle; An oil level correction coefficient is determined according to the current pitch angle and the current sideslip angle; wherein a preset corresponding relationship exists between a combination of the pitch angle and the sideslip angle and the oil level correction coefficient.

3. The lubricating oil level adjustment method according to claim 2, characterized in that: The step of determining an oil level correction coefficient according to the current pitch angle and the current sideslip angle comprises: If the current pitch angle is the first pitch angle and the current sideslip angle is the first sideslip angle, determining the oil level correction coefficient to be the first oil level correction coefficient; If the current pitch angle is the first pitch angle and the current sideslip angle is the second sideslip angle, determining the oil level correction coefficient to be the second oil level correction coefficient; wherein the second sideslip angle is greater than the first sideslip angle, and the correction degree of the first oil level correction coefficient to the initial oil level height is less than the correction degree of the second oil level correction coefficient to the initial oil level height; If the current pitch angle is the second pitch angle and the current sideslip angle is the first sideslip angle, the oil level correction coefficient is determined to be the third oil level correction coefficient; wherein, the second pitch angle is greater than the first pitch angle, and the correction degree of the first oil level correction coefficient for the initial oil level height is less than the correction degree of the third oil level correction coefficient for the initial oil level height.

4. The lubricating oil level adjustment method according to claim 1, characterized in that: The step of obtaining the current driving posture of the vehicle and determining the oil level correction coefficient according to the current driving posture comprises: Detecting that the current driving road of the vehicle is a preset slope, determining that the current driving posture of the vehicle is a front-to-back tilt posture; The current slope of the road on which the vehicle is traveling in the front-rear tilted posture is determined, and an oil level correction coefficient is determined according to the current slope; wherein there is a preset corresponding relationship between the slope of the road on which the vehicle is traveling and the oil level correction coefficient.

5. The lubricating oil level adjustment method according to claim 1, characterized in that: The step of obtaining the current driving posture of the vehicle and determining the oil level correction coefficient according to the current driving posture comprises: When it is detected that the current driving road of the vehicle is a preset curve, it is determined that the current driving posture of the vehicle is a left-right tilt posture; The oil level correction coefficient is determined according to the left-right tilt degree of the vehicle in the left-right tilt posture; wherein the left-right tilt degree of the vehicle and the oil level correction coefficient have a preset corresponding relationship.

6. The lubricating oil level adjustment method according to claim 5, characterized in that: The step of determining the oil level correction coefficient according to the left-right tilt degree of the vehicle in the left-right tilt posture comprises: Acquire the curvature of the preset curve and the current speed of the vehicle when the vehicle is in the left-right tilted posture; The preset left and right tilt degree of the vehicle in the left and right tilt posture is determined according to the curve curvature and the current vehicle speed; wherein there is a preset corresponding relationship between the combination of the curve curvature and the vehicle speed and the preset left and right tilt degree.

7. The lubricating oil level adjustment method according to claim 1, characterized in that: The step of determining the initial oil level of the oil pan according to the current operating parameters of the driving motor of the vehicle comprises: Acquire the current speed and current torque of the driving motor of the vehicle; The initial oil level of the oil pan is determined according to the current rotational speed and the current torque; wherein a preset corresponding relationship exists between a combination of the rotational speed and the torque of the driving motor and the initial oil level.

8. The lubricating oil level adjustment method according to claim 7, characterized in that: The step of determining the initial oil level of the oil pan according to the current rotation speed and the current torque comprises: If the current speed is the first speed and the current torque is the first torque, determining that the initial oil level of the oil pan is the first initial oil level; If the current speed is the first speed and the current torque is the second torque, determining that the initial oil level of the oil pan is the second initial oil level; wherein the second torque is greater than the first torque, and the second initial oil level is greater than the first initial oil level; If the current speed is the second speed and the current torque is the first torque, the initial oil level of the oil pan is determined to be a third initial oil level; wherein the second speed is greater than the first speed, and the third initial oil level is greater than the first initial oil level.

9. A lubricating oil level regulating device for a vehicle electric drive system, characterized in that: include: An oil storage member, which is in communication with the oil pan of the electric drive system, wherein lubricating oil is stored in the oil storage member and the oil pan; A piston is disposed in the oil storage member, and the piston is movable in the oil storage member; a driving member connected to the piston, the driving member being used to drive the piston to move in the oil storage member to adjust the amount of oil in the oil storage member, so as to adjust the oil level in the oil pan; A control device, wherein the control device is used to execute the lubricating oil level adjustment method of the vehicle electric drive system according to any one of claims 1 to 8, so as to adjust the oil level height of the oil pan.

10. An electronic device, characterized in that: include: processor; A memory for storing a computer program, wherein when the computer program is executed by the processor, the method for adjusting the lubricating oil level of the vehicle electric drive system according to any one of claims 1 to 8 is implemented.

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