Method, apparatus, device, and computer program product for determining a lubricating oil fill

Abstract

The application provides a method, device, equipment and computer program product for determining the filling amount of lubricating oil. The method is applied to a hybrid special gearbox, which comprises an oil pan for storing lubricating oil, an oil suction port arranged on the oil pan, and a cavity above the oil pan. The method comprises determining the maximum suspended oil amount and the initial oil amount of the oil pan, wherein the maximum suspended oil amount represents the maximum instantaneous oil amount of the lubricating oil entering the cavity from the oil pan in the running state of the hybrid special gearbox, and the liquid level height of the initial oil amount is not lower than the height of the oil suction port; and the target filling amount is determined based on the sum of the maximum suspended oil amount and the initial oil amount. Through the method, the amount of lubricating oil is accurately determined, the lubrication performance is ensured, and the problem of reduced motor output efficiency caused by excessive addition of lubricating oil is improved.

Description

Technical Field

[0001] This application relates to the field of hybrid power transmission technology, and in particular to a method, apparatus, device, and computer program product for determining the amount of lubricating oil to be added. Background Technology

[0002] As a core power component of hybrid electric vehicles, the amount of lubricating oil in the dedicated hybrid transmission (DHT) has a significant impact on its operation. Insufficient lubricating oil can lead to oil pump cavitation after a period of operation, causing the motor temperature within the DHT to rise and reducing safety performance. Conversely, excessive lubricating oil significantly increases oil churning losses and noticeably reduces motor output efficiency. Therefore, a method for accurately determining the lubricating oil level is urgently needed to ensure proper lubrication. Summary of the Invention

[0003] Therefore, it is necessary to provide a method, apparatus, equipment, and computer program product for determining the amount of lubricating oil to be added, in order to address the above-mentioned technical problems.

[0004] In a first aspect, embodiments of this application provide a method for determining the amount of lubricating oil to be added. The method is applied to a hybrid power transmission, which includes: an oil pan for storing lubricating oil, an oil inlet disposed on the oil pan, and a cavity located above the oil pan; the method includes: Determine the maximum suspended oil volume and the initial oil volume in the oil pan; wherein, the maximum suspended oil volume represents the maximum instantaneous amount of lubricating oil entering the cavity from the oil pan when the hybrid power transmission is in operation, and the initial oil volume level is not lower than the height of the oil inlet. The target injection volume is determined based on the sum of the maximum suspended oil volume and the initial oil volume.

[0005] The lubricating oil filling method provided in this application determines the initial oil volume in the oil pan to ensure the liquid level is not lower than the oil suction port, thus reducing the risk of cavitation. Simultaneously, while operating the hybrid-specific transmission, the maximum amount of oil suspended in the cavity after leaving the oil pan is determined. Therefore, by summing the maximum suspended oil volume and the initial oil volume, the target filling amount is determined, effectively reducing the risk of lubricating oil cavitation caused by the lubricating oil in the upper cavity not returning to the oil pan in time, leading to a drop in the oil pan liquid level. This method yields a smaller lubricating oil filling amount as the target filling amount, ensuring lubrication performance while avoiding additional oil churning losses due to excessive lubricating oil filling, thus guaranteeing motor output efficiency.

[0006] In some embodiments, determining the initial oil volume in the oil pan includes: Determine the attitude type of the hybrid power transmission; wherein the attitude type includes at least two of the following: horizontal attitude, left tilt attitude, right tilt attitude, uphill attitude, and downhill attitude; Determine the candidate oil quantity corresponding to the posture type; wherein the height difference between the liquid level height corresponding to the candidate oil quantity and the oil suction port is within a preset range, and the lower limit of the preset range is 0; The largest of the candidate oil quantities is determined as the initial oil quantity.

[0007] In this embodiment, by determining the selectable oil quantity for hybrid power transmissions with different posture types, the initial oil quantity determined accordingly can be at least flush with the oil inlet under different postures, further reducing the risk of air intake and improving lubrication performance.

[0008] In some embodiments, the hybrid-specific transmission includes an oil pump connected to the oil inlet; The determination of the candidate oil quantity corresponding to the attitude type includes: Obtain the attitude parameters of the attitude type; Based on the aforementioned attitude parameters, a return oil simulation was performed to obtain the amount of lubricating oil drawn in by the oil pump through the suction port. In response to the lubricating oil quantity meeting the target threshold, the oil pan oil quantity corresponding to the lubricating oil quantity is determined as the candidate oil quantity.

[0009] In this embodiment, the amount of lubricating oil drawn in by the oil pump is used to select the oil pan oil volume with a sufficiently low risk of pump cavitation under the corresponding attitude type as the candidate oil volume, so as to select a candidate oil volume with higher reliability and improve the accuracy of the initial oil volume.

[0010] In some embodiments, the hybrid-specific transmission includes a reduction gear equipped with gears; After determining the oil volume in the oil pan corresponding to the lubricating oil volume as the candidate oil volume, the method further includes: Based on the attitude parameters, oil return simulation is performed to determine the lubricating oil level and the gear tooth root height. Based on the height difference between the liquid level and the tooth root, the volume of the cavity between the lubricating oil surface and the tooth root is determined; The initial oil quantity is determined based on the sum of the cavity volume and the oil quantity to be selected.

[0011] In this embodiment, the cavity volume is determined by the height difference between the lubricating oil level and the tooth root height. Based on this, the cavity volume and the sum of the selected oil quantity are calculated to further improve the accuracy of the initial oil quantity. This reduces the risk of cavitation while ensuring splash lubrication performance during reducer operation, thereby improving the lubrication performance of the lubricating oil in the hybrid power transmission.

[0012] In some embodiments, the hybrid-specific transmission includes: an electric motor and a reduction gearbox driven by the electric motor; determining the maximum suspension oil quantity includes: The first suspended oil volume is determined when the oil pump is operating at its peak condition; the first suspended oil volume represents the maximum amount of lubricating oil that is sprayed onto the motor by the oil pump connected to the oil suction port and enters the first cavity under the action of centrifugal force. The second suspended oil quantity is determined when the reducer is in peak operating condition; the second suspended oil quantity represents the maximum amount of oil entering the second cavity under the stirring action of the reducer gears; The maximum suspended oil volume is determined based on the sum of the first suspended oil volume and the second suspended oil volume.

[0013] In this embodiment, by decoupling active lubrication, cooling and splash lubrication, the first suspended oil volume entering the first cavity and the second suspended oil volume entering the second cavity are determined respectively, thereby improving the accuracy of the maximum suspended oil volume and promoting the accuracy of the target filling volume.

[0014] In some embodiments, before determining the target injection volume based on the sum of the maximum suspended oil volume and the initial oil volume, the process includes: The amount of oil adhering to the wall is obtained, and the full oil level of the functional component is determined based on the sum of the internal volumes of the functional components; the amount of oil adhering to the wall is the amount of oil attached to the side wall of the hybrid power transmission; the functional component includes a filter component and a cooling component. The determination of the target injection volume based on the sum of the maximum suspended oil volume and the initial oil volume includes: The sum of the oil level on the wall, the full oil level, the maximum suspended oil level, and the initial oil level is determined as the target filling amount.

[0015] In this embodiment, by introducing the amount of oil adhering to the wall and the amount of oil stored in the functional components of the hybrid power transmission under operating conditions, the target filling amount is determined. This reduces the impact of the inevitable errors caused by factors such as oil storage and oil adhering in the internal structure of the hybrid power transmission on the target filling amount, and further improves the accuracy of the target filling amount.

[0016] Secondly, embodiments of this application provide a device for determining the amount of lubricating oil added. The device is installed in a hybrid power transmission, which includes an oil pan for storing lubricating oil, an oil inlet located in the oil pan, and a cavity above the oil pan. The device includes: The oil level unit is used to determine the maximum suspended oil level and the initial oil level in the oil pan; wherein, the maximum suspended oil level represents the maximum instantaneous amount of lubricating oil entering the cavity from the oil pan when the hybrid power transmission is in operation, and the initial oil level is not lower than the height of the oil inlet. The refueling unit is used to determine the target refueling amount based on the sum of the maximum suspended oil volume and the initial oil volume.

[0017] In some embodiments, the oil quantity unit is specifically used to determine the attitude type of the hybrid power transmission; wherein the attitude type includes at least two of the following: horizontal attitude, left tilt attitude, right tilt attitude, uphill attitude, and downhill attitude; determine the candidate oil quantity corresponding to the attitude type; wherein the height difference between the liquid level height corresponding to the candidate oil quantity and the oil inlet is within a preset range, and the lower limit of the preset range is 0; and determine the largest candidate oil quantity as the initial oil quantity.

[0018] In some embodiments, the hybrid-specific transmission includes an oil pump connected to the oil inlet; the oil quantity unit is specifically used to acquire attitude parameters of the attitude type; based on the attitude parameters, perform oil return simulation to obtain the amount of lubricating oil drawn in by the oil pump through the oil inlet; in response to the lubricating oil quantity meeting a target threshold, determine the lubricating oil quantity as the candidate oil quantity.

[0019] In some embodiments, the hybrid-specific transmission includes a reducer with gears; the oil quantity unit is further configured to perform oil return simulation based on the attitude parameters to determine the lubricating oil level and the gear root height; determine the cavity volume between the lubricating oil surface and the gear root based on the height difference between the lubricating oil level and the gear root; and determine the initial oil quantity based on the sum of the cavity volume and the candidate oil quantity.

[0020] In some embodiments, the oil quantity unit is further used to determine a first suspended oil quantity when the oil pump is in peak operating condition; the first suspended oil quantity represents the maximum amount of lubricating oil that is sprayed onto the motor by the oil pump connected to the oil inlet and enters the first cavity under the action of centrifugal force; determine a second suspended oil quantity when the reducer is in peak operating condition; the second suspended oil quantity represents the maximum amount of oil that enters the second cavity under the stirring action of the reducer gears; and determine the maximum suspended oil quantity based on the sum of the first suspended oil quantity and the second suspended oil quantity.

[0021] In some embodiments, the device further includes an additional unit specifically used to acquire the amount of oil adhering to the wall and determine the full oil level of the functional components based on the sum of the internal volumes of the functional components; the amount of oil adhering to the wall is the amount of oil attached to the side wall of the hybrid power transmission; the functional components include a filter component, a cooling component, and a conveying component. The filling unit is specifically used to determine the target filling amount by the sum of the wall-mounted oil volume, the full oil volume, the maximum suspended oil volume, and the initial oil volume.

[0022] Thirdly, embodiments of this application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and used to run on the processor, wherein the processor executes the computer program to implement the methods described in the first aspect and any of the embodiments therein.

[0023] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the methods described in the first aspect and any of the embodiments therein.

[0024] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect and any of the embodiments therein. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a flowchart illustrating a method for determining the amount of lubricating oil to be added in one embodiment; Figure 2 This is a structural block diagram of a device for determining the lubricating oil filling amount in one embodiment; Figure 3 This is a diagram of the internal structure of an electronic device in one embodiment. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. The use of the same terms in various places throughout the document does not necessarily refer to the same embodiments, nor are they necessarily independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] The illustrations provided in this embodiment are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] As illustrated herein, unless the context clearly indicates otherwise, the words “a,” “an,” “a,” and / or “the” are not specifically singular and may include the plural. The definitions of “included” as used herein, such as the terms “having,” “may have,” “comprising,” or “may include,” indicate the presence of the corresponding function, operation, element, etc., and do not limit the presence of one or more other functions, operations, elements, etc. Furthermore, it should be understood that the terms “comprising” or “having” as used herein indicate the presence of the features, figures, steps, operations, elements, components, or combinations thereof described in the specification, without excluding the presence or addition of one or more other features, figures, steps, operations, elements, components, or combinations thereof.

[0030] The prefixes such as "first" and "second" used in this application embodiment are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this application embodiment does not constitute a limitation on the described objects. For statements regarding the described objects, please refer to the claims or the context of the embodiments. The use of such prefixes should not constitute unnecessary limitations. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0031] To address the lack of a method for determining the amount of lubricating oil in a dedicated hybrid power transmission, this application provides a method for determining the amount of lubricating oil to be added. For ease of understanding, the structure of the dedicated hybrid power transmission is first described below. The dedicated hybrid power transmission includes: an oil pan, an oil inlet located in the oil pan, an oil pump, a motor, a reducer, and a return oil passage. The oil pan is located at the bottom of the dedicated hybrid power transmission and is used to store (i.e., contain) lubricating oil. The oil pump, with its input end connected to the oil inlet, pumps the lubricating oil from the oil pan to the oil supply line, which then delivers the lubricating oil to components requiring lubrication or cooling, such as the oil cooler and lubrication points. The motor has internal oil guide holes so that, when the motor rotor rotates, the lubricating oil enters a first cavity around the rotor (e.g., the motor's internal cavity) under centrifugal force, where the motor windings and core can be cooled. The reducer, located within the transmission, has some gears immersed in the lubricating oil in the oil pan. As the reducer rotates, the gears agitate the lubricating oil, causing it to splash and enter a second cavity (e.g., located inside the reducer). The oil return passage is used for the lubricating oil to flow back to the oil pan under the action of gravity after cooling or lubrication.

[0032] Both the first and second cavities are located above the oil pan. These cavities can operate independently. Furthermore, the housing of this hybrid-specific transmission is equipped with an oil return port. Before the lubricating oil level rises to submerge the motor air gap, this return port guides the lubricating oil back to the oil pan when it reaches the port's height, preventing the lubricating oil from continuing to rise and submerging the motor air gap.

[0033] Based on the above hybrid-specific transmission, please refer to the following: Figure 1 The embodiments of this application include the following implementation steps: Step 101: Determine the maximum suspended oil volume and the initial oil volume in the oil pan.

[0034] Among them, the maximum suspended oil volume represents the maximum instantaneous amount of lubricating oil that enters the cavity from the oil pan when the hybrid-specific transmission is in operation.

[0035] The initial oil level should not be lower than the height of the oil suction port.

[0036] The initial oil volume mentioned above can be the oil volume in the oil pan before the DHT enters the operating state and is in a horizontal position.

[0037] The aforementioned maximum suspended oil volume can be the maximum instantaneous amount of lubricating oil leaving the oil pan as the oil pump and / or reducer operates. For example, the aforementioned maximum suspended oil volume can be obtained through oil return simulation.

[0038] Step 102: Determine the target injection volume based on the sum of the maximum suspended oil volume and the initial oil volume.

[0039] In one embodiment, the maximum suspended oil volume V can be... s With initial oil quantity V i The sum of these is determined as the target injection volume V. t V t =V s +V i .

[0040] Alternatively, in one embodiment, after obtaining a preset first coefficient f, the first coefficient and the maximum suspended oil volume V can be calculated. s With initial oil quantity V i The product of the sums is used as the target injection amount V. t V t =f×(V s +V i f > 1. For example, the value of the first coefficient can be 1.05 ≤ f ≤ 1.5; or 1.05 ≤ f ≤ 1.15. In this way, by using a first coefficient greater than 1, a safety margin is reserved for accidental factors such as manufacturing tolerances and operating condition fluctuations, so as to further reduce the risk of air intake during the operation of the hybrid power transmission.

[0041] In the method for determining the lubricating oil filling amount in steps 101-102, considering the possibility that lubricating oil may enter the upper cavity along with the motor or reducer in the hybrid power transmission, the maximum suspended oil amount is determined simultaneously with the initial oil amount. The target filling amount determined accordingly ensures that the risk of air suction in the oil pump connected to the lower oil suction port is low when lubricating oil enters the cavity along with the motor or reducer, thereby improving the reliability of the hybrid power transmission. Furthermore, because the target filling amount is low, it also avoids additional oil churning losses caused by excessive lubricating oil filling, ensuring motor output efficiency.

[0042] In a hybrid transmission, the oil suction port is fixed in position on the oil pan. Therefore, with a fixed amount of lubricating oil in the transmission, the relative height between the lubricating oil level and the suction port changes with the transmission's attitude. For example, in a horizontal orientation, the lubricating oil level is at the same height as the suction port. However, as the vehicle's attitude changes, when the transmission switches to a larger tilt angle, the lubricating oil level in the oil pan drops instantaneously, potentially falling below the suction port, resulting in a higher risk of cavitation. Therefore, to prevent the oil pump from cavitating due to tilting during operation, in one embodiment, the transmission's attitude type can be determined first. This attitude type includes at least two of the following: horizontal, left-tilt, right-tilt, uphill, and downhill. Then, a candidate oil quantity corresponding to the attitude type is determined. The height difference between the fluid level corresponding to the candidate oil quantity and the suction port falls within a preset range, with the lower limit of this range being 0. The upper limit of this preset range can be, for example, 0.1 cm, 1 cm, 3 cm, or 5 cm. For example, the height difference between the liquid level corresponding to the oil quantity to be selected and the oil suction port can be 0. Finally, the largest oil quantity to be selected is determined as the initial oil quantity.

[0043] For example, the above posture types can consist of a left-leaning posture and a right-leaning posture. Alternatively, they can consist of a left-leaning posture and an uphill posture. Alternatively, they can consist of a left-leaning posture, a right-leaning posture, and an uphill posture. Alternatively, they can consist of a horizontal posture, a left-leaning posture, a right-leaning posture, an uphill posture, and a downhill posture.

[0044] The aforementioned posture types correspond to the vehicle body posture angles of the vehicle equipped with the hybrid-specific transmission. For example, when the posture types include left-tilt, left-tilt, right-tilt, uphill, and downhill postures, each non-horizontal posture type is a single-axis tilt posture. For instance, in the uphill or downhill posture, the tilt is along the Y-axis, with both the roll and yaw angles being 0, while the pitch angle is not 0. Alternatively, in the left-tilt or right-tilt posture, the tilt is along the X-axis, with both the pitch and yaw angles being 0, while the roll angle is not 0. Or, the non-horizontal posture types can be combined tilts. For example, uphill left-tilt, uphill right-tilt, downhill left-tilt, and downhill right-tilt.

[0045] During operation, when the oil pump of a hybrid transmission draws in cavitation, the amount of lubricating oil drawn from the suction port decreases. Therefore, the risk of cavitation in the oil pump can be judged by the flow rate of the oil pump.

[0046] Thus, in one embodiment, determining the candidate oil quantity corresponding to the attitude type may include: acquiring the attitude parameters of the attitude type, such as the tilt angle. Then, based on the attitude parameters, a return oil simulation is performed to obtain the amount of lubricating oil drawn in by the oil pump through the suction port. This lubricating oil quantity is the amount of oil drawn in when the oil pump reaches a steady state after running for a period of time. For example, it could be the amount of oil drawn in at the end of the simulation. Finally, in response to the lubricating oil quantity meeting a target threshold, it can be determined that this lubricating oil quantity can effectively reduce the risk of oil pump cavitation under the corresponding attitude type, so the oil sump quantity corresponding to the lubricating oil quantity can be determined as the candidate oil quantity. This oil sump quantity is the oil sump quantity before the hybrid-specific transmission enters the operating state. For example, the target threshold can be a preset percentage of the maximum flow rate of the oil pump, such as 60%, 70%, or 80%. When the aforementioned candidate oil quantity and initial oil quantity are determined through oil return simulation, in order to reduce the influence of other components in the hybrid power transmission on the aforementioned candidate oil quantity and initial oil quantity, the oil cooler, reducer, etc. can be controlled not to participate in the simulation to obtain the candidate oil quantity, thereby increasing the candidate oil quantity corresponding to the low risk of oil pump cavitation.

[0047] Because hybrid-specific transmissions also include a reducer with gears, when the reducer is running, the lubricating oil stored in the oil pan splashes due to the churning action of the gears, creating splash lubrication. Therefore, while the risk of cavitation is low during hybrid-specific transmission operation, situations may arise where the reducer gears cannot adequately churn the oil due to a low oil level in the oil pan. This can lead to decreased reducer efficiency and reduced lubrication performance.

[0048] Therefore, in one embodiment, the attitude type of the hybrid-specific transmission and the corresponding attitude parameters can be obtained. Then, based on these attitude parameters, oil return simulation can be performed to determine the lubricating oil level and the gear root height. Next, based on the height difference between the lubricating oil level and the gear root height, the cavity volume between the lubricating oil surface and the gear root can be determined. Finally, based on the sum of this cavity volume and the selected oil quantity, a more accurate initial oil quantity can be determined.

[0049] In a preferred embodiment, the above-mentioned lubricating oil level height can be the lubricating oil level height under a stable state during oil return simulation.

[0050] At this point, the lubricating oil level is essentially consistent. The tooth root height can be the height of a plane tangent to the lubricating oil level in the oil pan and aligned with the tooth root circle, using the same reference datum as the lubricating oil surface. The height difference can be the vertical distance between a plane parallel to the lubricating oil level in the oil pan and tangent to the tooth root circle, and the lubricating oil level. The cavity volume can be the maximum cavity volume determined for each attitude parameter, further reducing the risk that the lubricating oil level in the oil pan will fall below the reducer tooth root due to attitude changes, thus preventing the reducer gears from adequately churning the oil.

[0051] The initial oil quantity determined based on the above embodiments can further improve the accuracy of the initial oil quantity, thereby reducing the risk that the reducer gears will not be able to fully churn the oil due to the reduction of lubricating oil in the oil pan when the hybrid dedicated transmission is running, resulting in insufficient splash lubrication performance.

[0052] In one embodiment, determining the maximum suspended oil volume includes: determining a first suspended oil volume when the oil pump is operating at its peak. This first suspended oil volume represents the maximum amount of lubricating oil that is sprayed onto the motor by the oil pump connected to the oil inlet and enters the first cavity under centrifugal force. This first suspended oil volume can also be the amount of lubricating oil that is radially ejected through the oil guide holes of the motor rotor under centrifugal force as the motor rotor rotates. Therefore, the first suspended oil volume is the amount of oil that remains in the air and does not return to the oil pan during motor oil spraying and ejection.

[0053] Then, determine the second suspended oil quantity when the reducer is operating at its peak. The second suspended oil quantity represents the maximum amount of lubricating oil in the oil pan that enters the second cavity under the agitation action of the reducer gears. The aforementioned second suspended oil quantity can be the amount of oil splashed into the air by the shearing force generated by the agitation of the reducer gears that has not yet flowed back to the oil pan.

[0054] Finally, the maximum suspended oil volume can be determined based on the sum of the first and second suspended oil volumes. Optionally, the maximum suspended oil volume can be the product of a preset suspension coefficient greater than or equal to 1 and the sum of the first and second suspended oil volumes. When the preset suspension coefficient is greater than 1, the portion exceeding 1 is a reserved safety factor. Therefore, examples of values ​​for the preset suspension coefficient are as follows: 1, 1.1, 1.2, 1.3, 1.4, or a range derived from any two of the above. The first cavity and the second cavity can be connected. Alternatively, the first cavity and the second cavity can be disconnected.

[0055] In this way, the changes in lubricating oil when the reducer is running and when the motor is running are decoupled, and the amount of oil sent to the first cavity by the motor rotor and the amount of oil sent to the second cavity when the reducer is running are calculated separately, so as to accurately obtain the aforementioned maximum suspended oil volume, thereby improving the accuracy of the target filling amount.

[0056] To reduce the impact of the state or operating parameters of functional components such as the oil cooler, suction filter, and return oil pipeline on the accuracy of the initial oil quantity, when performing return oil simulation analysis to determine the initial oil quantity in the oil pan, only the oil pump drawing lubricating oil from the suction port and the changes in the lubricating oil level in the oil pan can be simulated. Thus, to further improve the accuracy and reliability of the target filling quantity, the sum of the full oil quantities of the aforementioned functional components can be determined before or after obtaining the initial oil quantity. Furthermore, when injecting lubricating oil into a hybrid power transmission, the injected quantity is always greater than the initial oil quantity in the oil pan due to lubricating oil adhering to the transmission walls. Therefore, the amount of oil adhering to the walls can also be obtained to reduce the deviation in the target filling quantity caused by factors such as lubricating oil adhering to the walls. This amount of oil adhering to the walls can be a predetermined empirical value.

[0057] Thus, in one embodiment, the amount of oil adhering to the wall can be obtained, and the full oil volume of the functional component can be determined based on the sum of the internal volumes of the functional components. The functional components include a filtration component and a cooling component. The filtration component may include, for example, a suction filter or a filter press. The cooling component may include, for example, an oil cooler. The aforementioned functional components may also include a return line. Then, the sum of the amount of oil adhering to the wall, the aforementioned full oil volume, the maximum suspended oil volume, and the initial oil volume is determined as the target filling volume.

[0058] In one embodiment, the target filling amount can be determined by the sum of the following items: maximum suspended oil volume (i.e., the sum of the first and second suspended oil volumes), initial oil volume, wall-mounted oil volume, and full oil volume of functional components.

[0059] It should be understood that, although Figure 1 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0060] Based on the same inventive concept, such as Figure 2 As shown, this application embodiment provides a lubricating oil filling device 200, which is installed in a hybrid power transmission. The hybrid power transmission includes an oil pan for storing lubricating oil, an oil inlet located in the oil pan, and a cavity located above the oil pan. The lubricating oil filling device 200 includes an oil level unit 201 and a filling unit 202, wherein: Oil quantity unit 201 is used to determine the maximum suspended oil quantity and the initial oil quantity in the oil pan; wherein, the maximum suspended oil quantity represents the maximum instantaneous amount of lubricating oil entering the cavity from the oil pan when the hybrid dedicated transmission is in operation, and the initial oil level height is not lower than the height of the oil suction port. The refueling unit 202 is used to determine the target refueling amount based on the sum of the maximum suspended oil volume and the initial oil volume.

[0061] In one embodiment, the oil quantity unit 201 is specifically used to determine the attitude type of the hybrid power transmission; wherein the attitude type includes at least two of the following: horizontal attitude, left tilt attitude, right tilt attitude, uphill attitude, and downhill attitude; determine the candidate oil quantity corresponding to the attitude type; wherein the height difference between the liquid level height corresponding to the candidate oil quantity and the oil suction port is located in a preset range, and the lower limit of the preset range is 0; and determine the largest candidate oil quantity as the initial oil quantity.

[0062] In one embodiment, the hybrid-specific transmission includes an oil pump connected to the oil inlet; the oil quantity unit 201 is specifically used to acquire attitude parameters of the attitude type; based on the attitude parameters, perform oil return simulation to obtain the amount of lubricating oil drawn in by the oil pump through the oil inlet; in response to the lubricating oil quantity meeting the target threshold, determine the lubricating oil quantity as the candidate oil quantity.

[0063] In one embodiment, the hybrid power transmission includes a reducer with gears. The oil quantity unit 201 is further configured to perform oil return simulation based on attitude parameters to determine the lubricating oil level and the gear root height; based on the height difference between the lubricating oil level and the gear root height, determine the cavity volume between the lubricating oil surface and the gear root; and based on the sum of the cavity volume and the candidate oil quantity, determine the initial oil quantity. In one embodiment, the oil quantity unit 201 is further configured to determine a first suspended oil quantity when the oil pump is operating at its peak condition; the first suspended oil quantity represents the maximum amount of lubricating oil that is sprayed onto the motor by the oil pump connected to the suction port and enters the first cavity under centrifugal force; determine a second suspended oil quantity when the reducer is operating at its peak condition; the second suspended oil quantity represents the maximum amount of oil that enters the second cavity under the stirring action of the reducer gears; and based on the sum of the first and second suspended oil quantities, determine the maximum suspended oil quantity.

[0064] In one embodiment, the device further includes an additional unit, which is specifically used to obtain the amount of oil adhering to the wall and determine the full oil level of the functional components based on the sum of the internal cavities of the functional components; the amount of oil adhering to the wall is the amount of oil attached to the side wall of the hybrid power transmission; the functional components include a filter component, a cooling component, and a conveying component. The filling unit 202 is specifically used to determine the target filling amount by the sum of the wall-mounted oil volume, the full oil volume, the maximum suspended oil volume, and the initial oil volume.

[0065] Specific limitations regarding the device for determining the lubricating oil filling volume can be found in the limitations of the method for determining the lubricating oil filling volume above, and will not be repeated here. Each module in the aforementioned device for determining the lubricating oil filling volume can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the electronic device in hardware form or independently of it, or stored in the memory of the electronic device in software form, so that the processor can call and execute the corresponding operations of each module.

[0066] Based on the same inventive concept, please refer to Figure 3 This application also provides an electronic device. In one embodiment, the electronic device, as shown in the figure, may include a memory 301, a communication module 303, and one or more processors 302.

[0067] The memory 301 is used to store computer programs executed by the processor 302. The memory 301 may mainly include a program storage area and a data storage area, wherein the program storage area may store the operating system; and the data storage area may store various operation instruction sets, etc.

[0068] Memory 301 may be volatile memory, such as random-access memory (RAM); memory 301 may also be non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); or memory 301 may be any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. Memory 301 may be a combination of the above-mentioned memories.

[0069] Processor 302 may include one or more central processing units (CPUs) or digital processing units, etc. Processor 302 is used to implement the above-described method for determining the amount of lubricating oil added when it calls the computer program stored in memory 301.

[0070] The communication module 303 is used to communicate with terminal equipment, site equipment or other network equipment.

[0071] This application embodiment does not limit the specific connection medium between the memory 301, communication module 303, and processor 302 described above. This application embodiment... Figure 3The memory 301 and the processor 302 are connected via a bus 304, and the bus 304 is in Figure 3 The diagram uses thick lines to describe the connections between other components; these are for illustrative purposes only and should not be considered limiting. Bus 304 can be divided into address bus, data bus, control bus, etc. For ease of description, Figure 3 It is described using only a thick line, but does not indicate that there is only one bus or one type of bus.

[0072] The memory 301 stores a computer storage medium, which stores computer-executable instructions for implementing the method for determining the amount of lubricating oil to be added according to the embodiments of this application. The processor 302 is used to execute the method for determining the amount of lubricating oil to be added according to the embodiments of the above-described computer-executable instructions.

[0073] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0074] Based on the same inventive concept, embodiments of this application provide a computer-readable storage medium storing a computer program thereon, wherein the computer program, when executed by a processor, performs the following steps: Determine the maximum suspended oil volume and the initial oil volume in the oil pan; wherein, the maximum suspended oil volume represents the maximum instantaneous amount of lubricating oil entering the cavity from the oil pan when the hybrid-specific transmission is in operation, and the initial oil volume level is not lower than the height of the oil inlet; based on the sum of the maximum suspended oil volume and the initial oil volume, determine the target filling amount.

[0075] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchlink, DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0076] Based on the same inventive concept, embodiments of this application also provide a computer program product, including a computer program, which, when executed by a processor, implements the method for determining the amount of lubricating oil to be added as described above.

[0077] The program code for executing the computer program product of this application can be written in any combination of one or more programming languages. The program code can be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on a remote device.

[0078] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0079] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0080] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0081] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of user-operated steps to be executed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0082] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for determining the amount of lubricating oil to be added, characterized in that, The method is applied to a hybrid power transmission, which includes: an oil pan for storing lubricating oil, an oil inlet provided in the oil pan, and a cavity located above the oil pan. The method includes: Determine the maximum suspended oil volume and the initial oil volume in the oil pan; wherein, the maximum suspended oil volume represents the maximum instantaneous amount of lubricating oil entering the cavity from the oil pan when the hybrid power transmission is in operation, and the initial oil volume level is not lower than the height of the oil inlet. The target injection volume is determined based on the sum of the maximum suspended oil volume and the initial oil volume.

2. The method according to claim 1, characterized in that, Determining the initial oil volume in the oil pan includes: Determine the attitude type of the hybrid power transmission; wherein the attitude type includes at least two of the following: horizontal attitude, left tilt attitude, right tilt attitude, uphill attitude, and downhill attitude; Determine the candidate oil quantity corresponding to the posture type; wherein the height difference between the liquid level height corresponding to the candidate oil quantity and the oil suction port is within a preset range, and the lower limit of the preset range is 0; The largest of the candidate oil quantities is determined as the initial oil quantity.

3. The method according to claim 2, characterized in that, The hybrid-specific transmission includes an oil pump connected to the oil inlet; The determination of the candidate oil quantity corresponding to the attitude type includes: Obtain the attitude parameters of the attitude type; Based on the attitude parameters, a return oil simulation is performed to obtain the amount of lubricating oil drawn in by the oil pump through the oil inlet; In response to the lubricating oil quantity meeting the target threshold, the oil pan oil quantity corresponding to the lubricating oil quantity is determined as the candidate oil quantity.

4. The method according to claim 3, characterized in that, The hybrid-specific transmission includes a reducer, and the reducer is provided with gears; After determining the oil volume in the oil pan corresponding to the lubricating oil volume as the candidate oil volume, the method further includes: Based on the attitude parameters, oil return simulation is performed to determine the lubricating oil level and the gear tooth root height. Based on the height difference between the liquid level and the tooth root, the volume of the cavity between the lubricating oil surface and the tooth root is determined; The initial oil quantity is determined based on the sum of the cavity volume and the oil quantity to be selected.

5. The method according to claim 1, characterized in that, The hybrid power transmission includes: an electric motor, a reducer connected to the electric motor, and an oil pump connected to the oil inlet; Determining the maximum suspended oil volume includes: The first suspended oil volume is determined when the oil pump is operating at its peak; the first suspended oil volume represents the maximum amount of lubricating oil that is sprayed from the oil pump to the motor and enters the first cavity under centrifugal force. The second suspended oil quantity is determined when the reducer is in peak operating condition; the second suspended oil quantity represents the maximum amount of oil entering the second cavity under the agitation of the gears in the reducer; The maximum suspended oil volume is determined based on the sum of the first suspended oil volume and the second suspended oil volume.

6. The method according to any one of claims 1 to 5, characterized in that, Before determining the target injection volume based on the sum of the maximum suspended oil volume and the initial oil volume, the method further includes: The amount of oil adhering to the wall is obtained, and the full oil level of the functional component is determined based on the sum of the internal volumes of the functional components; the amount of oil adhering to the wall is the amount of oil attached to the side wall of the hybrid power transmission; the functional component includes a filter component and a cooling component. The determination of the target injection volume based on the sum of the maximum suspended oil volume and the initial oil volume includes: The sum of the oil level on the wall, the full oil level, the maximum suspended oil level, and the initial oil level is determined as the target filling amount.

7. A device for determining the amount of lubricating oil added, characterized in that, The device is installed in a hybrid power transmission, which includes an oil pan for storing lubricating oil, an oil inlet located in the oil pan, and a cavity located above the oil pan. The device includes: The oil level unit is used to determine the maximum suspended oil level and the initial oil level in the oil pan; wherein, the maximum suspended oil level represents the maximum instantaneous amount of lubricating oil entering the cavity from the oil pan when the hybrid power transmission is in operation, and the initial oil level is not lower than the height of the oil inlet. The refueling unit is used to determine the target refueling amount based on the sum of the maximum suspended oil volume and the initial oil volume.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and for running on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 6.

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