Method and device for determining control strategy of vehicle transmission and processor

Abstract

The invention discloses a method and device for determining a control strategy of a vehicle transmission and a processor. The method comprises the following steps: determining an operation mode entered by the hybrid power system of the vehicle; determining, based on the operating mode, a flow path for the cooling oil to flow in a vehicle transmission of the vehicle, the flow path representing a path for the cooling oil to flow in a component of the vehicle transmission; determining a demand flow rate of the vehicle transmission based on the flow path, where the demand flow rate is used to indicate a total excess flow rate of cooling oil needed to flow through components of the vehicle transmission per unit time; and based on the demand flow, a control strategy of the vehicle transmission is determined, and the control strategy is used for indicating a rule for controlling the flow of the cooling oil in the working process of the vehicle transmission. The technical problem that cooling oil cannot be accurately distributed to the vehicle transmission is solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a method, device and processor for determining a control strategy for a vehicle transmission. Background Art

[0002] In hybrid electric vehicles (HEVs), the thermal management system (TMS) is a key component affecting vehicle comfort and safety. Its primary function is to maintain core components such as the engine, motor, and battery within their optimal operating temperature range. For HEVs using dedicated hybrid transmissions, the compact design and small size of these transmissions require the integration of more electronic components within the limited space, further increasing the heat dissipation requirements of the TMS.

[0003] In the related art, hybrid electric vehicle thermal management systems on the market generally adopt a fixed flow distribution method, that is, cooling each subsystem through a fixed flow distribution path. However, this fixed flow distribution method has the following problems: First, because hybrid electric vehicles need to meet different cooling requirements in different operating modes (such as pure electric mode, hybrid mode, and engine drive mode), if a fixed flow distribution method is used, it is difficult to accurately meet the cooling needs of each subsystem; second, the cooling requirements of hybrid electric vehicles in different operating modes also vary greatly. Therefore, if a fixed flow distribution method is used, it is difficult to achieve efficient utilization of the cooling system; finally, the operating state of the cooling system of hybrid electric vehicles in different operating modes will also vary. Therefore, if a fixed flow distribution method is used, it is difficult to achieve effective monitoring and maintenance of the cooling system. Therefore, there is a technical problem that it is impossible to accurately distribute cooling oil to the vehicle transmission.

[0004] With respect to the above-mentioned technical problem of being unable to accurately distribute cooling oil to the vehicle transmission, no effective solution has been proposed so far. Summary of the Invention

[0005] Embodiments of the present invention provide a method, device, and processor for determining a control strategy for a vehicle transmission, so as to at least solve the technical problem of being unable to accurately distribute cooling oil to the vehicle transmission.

[0006] According to one aspect of an embodiment of the present invention, a method for determining a control strategy for a vehicle transmission is provided. The method may include: determining an operating mode entered by a hybrid system of a vehicle; determining a flow path of cooling oil flowing through a vehicle transmission of the vehicle based on the operating mode, wherein the flow path represents the path of the cooling oil flowing within components of the vehicle transmission; determining a required flow rate of the vehicle transmission based on the flow path, wherein the required flow rate indicates the total flow rate of cooling oil required to flow through the components of the vehicle transmission per unit time; and determining a control strategy for the vehicle transmission based on the required flow rate, wherein the control strategy indicates rules for controlling the flow rate of cooling oil during operation of the vehicle transmission.

[0007] Optionally, based on the operating mode, the flow path of the cooling oil flowing in the vehicle transmission is determined, including: in response to the operating mode being the parallel mode, determining the flow path as the first flow path, wherein the first flow path is used to indicate the paths of the cooling oil flowing to the generator and the drive motor in the vehicle transmission respectively; in response to the operating mode being the series mode, obtaining the vehicle speed; in response to the vehicle speed being greater than or equal to a vehicle speed threshold, determining the flow path as the first flow path; in response to the vehicle speed being less than the vehicle speed threshold, determining the flow path of the cooling oil flowing in the vehicle transmission as the second flow path, wherein the second flow path is used to indicate the path of the cooling oil flowing to the generator in the vehicle transmission; in response to the operating mode being a target mode other than the series mode and the parallel mode, determining the flow path of the cooling oil flowing in the vehicle transmission as the third flow path, wherein the third flow path is used to indicate the path of the cooling oil flowing to the drive motor in the vehicle transmission.

[0008] Optionally, based on the flow path, the required flow of the vehicle transmission is determined, including: based on the flow path, determining the sub-required flow of each component in the vehicle transmission, wherein the sub-required flow is used to indicate the flow rate of cooling oil that needs to flow through each component of the vehicle transmission per unit time; determining the maximum sub-required flow from the sub-required flows of multiple components; and determining the maximum sub-required flow as the required flow.

[0009] Optionally, based on the flow path, the sub-demand flow of each component in the vehicle transmission is determined, including: based on the flow path, determining the distribution coefficient of each component in the vehicle transmission, and obtaining the predetermined demand flow of each component, wherein the distribution coefficient is used to indicate the weight of distributing cooling oil to each component, and the predetermined demand flow is used to indicate the preset sub-demand flow of each component; based on the distribution coefficient and the predetermined demand flow, determining the sub-demand flow of each component.

[0010] Optionally, based on the demand flow, a control strategy for the vehicle transmission is determined, including: obtaining the starting status information of the vehicle's engine; in response to the starting status information indicating that the engine is in an abnormal starting state, determining that the control strategy is a first control strategy, wherein the first control strategy is used to indicate a rule for controlling the vehicle's electronic pump to start working and output the demand flow to the electronic pump; in response to the starting status being a normal starting state, obtaining the flow of the vehicle's mechanical pump; in response to the flow of the mechanical pump being greater than or equal to the demand flow, determining that the control strategy is a second control strategy, wherein the second control strategy is used to indicate a rule for controlling the vehicle's electronic pump to stop working; in response to the flow of the mechanical pump being less than the demand flow, determining a differential flow, wherein the differential flow is used to indicate the difference between the flow of the mechanical pump and the demand flow; based on the differential flow, determining that the control strategy is a third control strategy, wherein the third control strategy is used to indicate a rule for controlling the vehicle's electronic pump to start and output the differential flow to the electronic pump.

[0011] Optionally, the method for determining the control strategy of a vehicle transmission further includes: obtaining valve body throttle hole information of the vehicle, wherein the valve body throttle hole information is used to control the size of the opening or hole for controlling the flow of cooling oil; and determining the distribution coefficient of each of the components in the vehicle transmission based on the valve body throttle hole information.

[0012] According to another aspect of an embodiment of the present invention, a device for determining a control strategy for a vehicle transmission is provided. The device may include: a first determining unit for determining an operating mode entered by a hybrid system of a vehicle; a second determining unit for determining a flow path of cooling oil flowing through a vehicle transmission of the vehicle based on the operating mode, wherein the flow path represents a path of cooling oil flowing through components of the vehicle transmission; a third determining unit for determining a required flow rate of the vehicle transmission based on the flow path, wherein the required flow rate indicates the total flow rate of cooling oil required to flow through the components of the vehicle transmission per unit time; and a fourth determining unit for determining a control strategy for the vehicle transmission based on the required flow rate, wherein the control strategy indicates a rule for controlling the flow rate of cooling oil during operation of the vehicle transmission.

[0013] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided, which includes a stored program, wherein when the program is run by a processor, the device where the storage medium is located is controlled to execute the method for determining the control strategy of the vehicle transmission in an embodiment of the present invention.

[0014] According to another aspect of an embodiment of the present invention, a processor is provided, which is configured to run a program, wherein when the program is run, the method for determining a control strategy for a vehicle transmission according to an embodiment of the present invention is executed.

[0015] According to another aspect of an embodiment of the present invention, a vehicle is provided, which is used to execute the method for determining the control strategy of a vehicle transmission according to an embodiment of the present invention.

[0016] In an embodiment of the present invention, the operating mode of a vehicle's hybrid system is determined; based on the operating mode, a flow path of cooling oil flowing through the vehicle transmission of the vehicle is determined, wherein the flow path represents the path of cooling oil flowing within the components of the vehicle transmission; based on the flow path, a required flow rate of the vehicle transmission is determined, wherein the required flow rate indicates the total flow rate of cooling oil required to flow through the components of the vehicle transmission per unit time; and based on the required flow rate, a control strategy for the vehicle transmission is determined, wherein the control strategy indicates the rules for controlling the flow rate of cooling oil during operation of the vehicle transmission. In other words, in this embodiment of the present invention, the flow path of cooling oil is determined based on the operating mode of the vehicle's hybrid system, and the required flow rate of the vehicle transmission is determined based on the flow path, thereby determining the control strategy of the vehicle transmission. This solves the technical problem of being unable to accurately distribute cooling oil to the vehicle transmission and achieves the technical effect of accurately distributing cooling oil to the vehicle transmission. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 is a flow chart of a method for determining a control strategy of a vehicle transmission according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of a hybrid-specific transmission structure according to an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the hydraulic principle of a hybrid transmission according to an embodiment of the present invention;

[0021] Figure 4 is a flow chart of a method for controlling a position of a flow distribution solenoid valve according to an embodiment of the present invention;

[0022] Figure 5 is a flow chart of a method for calculating total flow demand according to an embodiment of the present invention;

[0023] Figure 6 is a flow chart of a method for calculating a flow execution solution according to an embodiment of the present invention;

[0024] Figure 7 is a schematic diagram of a device for determining a control strategy for a vehicle transmission according to an embodiment of the present invention;

[0025] Figure 8 is a schematic diagram of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, functional component or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, functional components or devices.

[0028] According to an embodiment of the present invention, an embodiment of a method for determining a control strategy for a vehicle transmission is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0029] Figure 1 FIG. 1 is a flow chart of a method for determining a control strategy of a vehicle transmission according to an embodiment of the present invention. Figure 1 As shown, the method may include the following steps:

[0030] Step S101 : determining the operating mode entered by the hybrid system of the vehicle.

[0031] In the technical solution provided in the above step S101 of the present invention, the operating mode may be referred to as a hybrid mode, and the operating mode may include at least a series mode, a parallel mode, and the like.

[0032] In this embodiment, the operating mode entered by the hybrid system of the vehicle is determined, for example, by factors such as the battery status and engine efficiency of the vehicle. This is only an illustrative example and does not limit the specific method of determining the operating mode entered by the hybrid system of the vehicle.

[0033] Alternatively, the vehicle's operating mode determines its power demand and thermal load distribution. Understanding these modes can help precisely control the direction and volume of cooling oil flow, ensuring timely and effective cooling of components with high thermal loads, thereby improving the efficiency of the entire cooling system.

[0034] In step S102 , a flow path of cooling oil flowing in a vehicle transmission of the vehicle is determined based on the operating mode.

[0035] In the technical solution provided in the above step S102 of the present invention, the flow path is used to represent the path of the cooling oil flowing in the components of the vehicle transmission, wherein the components of the vehicle transmission may at least include but are not limited to: a generator, a drive motor and shaft gears.

[0036] In this embodiment, after determining the operating mode entered by the hybrid system of the vehicle in step S101, the position of the vehicle solenoid valve is determined according to different operating modes, thereby determining the flow path of the cooling oil flowing in the vehicle transmission of the vehicle.

[0037] Optionally, when the operating mode is parallel mode, it means that the vehicle's generator and motor can be directly or indirectly connected to the drive wheels through the transmission, which means that the generator and motor can work simultaneously to provide power. Based on this, it can be determined that the position of the vehicle solenoid valve is in the middle, so that the flow path of the cooling oil flowing in the vehicle's vehicle transmission can be determined as: the cooling oil flows to the generator and drive motor in the vehicle transmission respectively.

[0038] Alternatively, when the operating mode is series mode, indicating that the generator does not directly drive the wheels but instead drives the generator, the generated electricity being used to supply the electric motor to drive the wheels or charge the battery, the position of the solenoid valve needs to be further determined based on the vehicle's current speed, thereby determining the flow path of the cooling oil in the vehicle's transmission. Based on this, the vehicle speed is obtained, and the flow path of the cooling oil in the vehicle's transmission is determined based on the vehicle speed.

[0039] Optionally, when the operating mode is neither parallel mode nor series mode, it indicates that the vehicle may be using a variant of a hybrid power system, or a more complex power architecture that requires a drive motor to provide power. Based on this, it can be determined that the position of the vehicle solenoid valve is on the left, thereby determining that the flow path of the cooling oil flowing in the vehicle transmission of the vehicle is: the path of the cooling oil flowing to the drive motor in the vehicle transmission.

[0040] Optionally, the operating mode reflects the vehicle's power requirements under specific operating conditions. This means that heat sources within the transmission (e.g., the electric motor, engine, and gear train) generate different amounts of heat in different modes. Once the operating mode is determined, cooling oil flow can be adjusted accordingly, ensuring that cooling oil flows preferentially to components with higher heat loads, thereby more effectively removing heat and improving cooling efficiency.

[0041] Step S103 : determining the required flow rate of the vehicle transmission based on the flow path.

[0042] In the technical solution provided in the above step S103 of the present invention, the required flow rate is used to indicate the total flow rate of cooling oil that needs to flow through the components of the vehicle transmission per unit time, wherein the required flow rate may also be referred to as the total required flow rate.

[0043] In this embodiment, after determining the flow path of the cooling oil flowing in the vehicle transmission of the vehicle in step S102, the distribution coefficients and preset flow requirements of different components of the vehicle transmission are determined according to different flow paths, thereby determining the required flow of the vehicle transmission.

[0044] For example, through different flow paths, by querying the flow distribution table, the distribution coefficients and flow requirements of different components of the vehicle transmission are determined respectively, so as to calculate the distribution coefficients and flow requirements of different components of the vehicle transmission and determine the total required flow of the vehicle transmission.

[0045] Alternatively, different flow paths represent different heat sources and cooling requirements. By calculating the distribution coefficients and presetting the flow requirements for specific components, personalized coolant distribution can be provided for each thermal management target, ensuring that all critical components are within their optimal operating temperature range, which helps prevent overheating and improves system reliability.

[0046] Step S104: determining a control strategy for the vehicle transmission based on the required flow rate.

[0047] In the technical solution provided in the above step S104 of the present invention, the control strategy is used to indicate the rules for controlling the flow rate of the cooling oil during the operation of the vehicle transmission.

[0048] In this embodiment, after determining the required flow rate of the vehicle transmission in step S103, the vehicle's engine startup state is determined, and a control strategy for the vehicle transmission is determined based on the required flow rate and the engine startup state. For example, when the engine is started, the control strategy may prioritize the cooling oil flow provided by the mechanical pump. When the engine is not started or the flow provided by the mechanical pump is insufficient, the control strategy may activate the electronic pump to increase the cooling oil flow. Cooling oil is supplied on demand by coordinating control of the mechanical and electronic pumps and adjusting the position of the flow distribution solenoid valve. This is merely an example and does not limit the specific method for determining the vehicle transmission control strategy.

[0049] Optionally, once the required flow rate is determined, excessive cooling system operation can be avoided, reducing unnecessary energy consumption. Furthermore, intelligent control strategies can optimize cooling system operation, such as reducing the cooling oil pump power under low-load conditions, thereby saving energy and improving the energy efficiency of the entire powertrain.

[0050] It should be noted that the above embodiment can be executed by a device for determining a control strategy of a vehicle transmission.

[0051] In steps S101 through S104 of the present invention, the operating mode of the vehicle's hybrid system is determined; based on the operating mode, a flow path of cooling oil flowing through the vehicle transmission is determined, wherein the flow path represents the path of cooling oil flowing within the components of the vehicle transmission; based on the flow path, a required flow rate of the vehicle transmission is determined, wherein the required flow rate indicates the total flow rate of cooling oil required to flow through the components of the vehicle transmission per unit time; and based on the required flow rate, a control strategy for the vehicle transmission is determined, wherein the control strategy indicates the rules for controlling the flow rate of cooling oil during operation of the vehicle transmission. In other words, in this embodiment of the present invention, the cooling oil flow path is determined based on the vehicle's hybrid system operating mode, and the required flow rate of the vehicle transmission is determined based on the flow path, thereby determining the control strategy for the vehicle transmission. This solves the technical problem of being unable to accurately distribute cooling oil to the vehicle transmission and achieves the technical effect of accurately distributing cooling oil to the vehicle transmission.

[0052] The above method of this embodiment is further introduced below.

[0053] As an optional embodiment, based on the operating mode, the flow path of the cooling oil flowing in the vehicle transmission is determined, including: in response to the operating mode being the parallel mode, determining the flow path as the first flow path, wherein the first flow path is used to indicate the path of the cooling oil flowing to the generator and the drive motor in the vehicle transmission respectively; in response to the operating mode being the series mode, obtaining the vehicle speed; in response to the vehicle speed being greater than or equal to the vehicle speed threshold, determining the flow path as the first flow path; in response to the vehicle speed being less than the vehicle speed threshold, determining the flow path of the cooling oil flowing in the vehicle transmission as the second flow path, wherein the second flow path is used to indicate the path of the cooling oil flowing to the generator in the vehicle transmission; in response to the operating mode being a target mode other than the series mode and the parallel mode, determining the flow path of the cooling oil flowing in the vehicle transmission as the third flow path, wherein the third flow path is used to indicate the path of the cooling oil flowing to the drive motor in the vehicle transmission.

[0054] In this embodiment, when the operating mode is the parallel mode, it means that the vehicle's generator and motor can be directly or indirectly connected to the drive wheels through the transmission, which means that the generator and motor can work simultaneously to provide power. Based on this, the flow path can be determined to be the first flow path.

[0055] Optionally, when the operating mode is series mode, it means that the generator does not directly drive the wheels, but is used to drive the generator, and the generated electric energy is supplied to the electric motor to drive the wheels, or to charge the battery. It is necessary to further determine the flow path based on the speed of the vehicle at this time. Based on this, the vehicle speed is obtained. When the vehicle speed is greater than or equal to the speed threshold, the flow path is determined to be the first flow path; when the vehicle speed is less than the speed threshold, the flow path of the cooling oil flowing in the vehicle transmission is determined to be the second flow path.

[0056] For example, when the vehicle speed is greater than or equal to the speed threshold of 5 kph, it means that the vehicle has a high flow demand here, and the generator and drive motor need to provide power at the same time. Based on this, it can be determined that the flow path of the cooling oil flowing in the vehicle transmission is the first flow path.

[0057] For another example, when the vehicle speed is less than the speed threshold of 5 kph, it indicates that the vehicle flow demand here is not high and only the generator provides power. Based on this, it can be determined that the flow path of the cooling oil flowing in the vehicle transmission is the second flow path.

[0058] Optionally, when the operating mode is a target mode other than the series mode and the parallel mode, the flow path of the cooling oil flowing in the vehicle transmission is determined to be the third flow path, indicating that the vehicle may adopt a variant of the hybrid system, or a more complex power architecture that requires a drive motor to provide power. Based on this, the flow path of the cooling oil flowing in the vehicle transmission can be determined to be the third flow path.

[0059] Optionally, by determining different flow paths according to different hybrid modes, it is ensured that the cooling system can effectively respond to the vehicle's thermal management needs in parallel, series or other modes, maintaining the stability and reliability of the system operation.

[0060] As an optional embodiment, the required flow of a vehicle transmission is determined based on a flow path, including: determining the sub-required flow of each component in the vehicle transmission based on the flow path, wherein the sub-required flow is used to indicate the flow rate of cooling oil that needs to flow through each component of the vehicle transmission per unit time; determining the maximum sub-required flow from the sub-required flows of multiple components; and determining the maximum sub-required flow as the required flow.

[0061] In this embodiment, the sub-demand flow of each component in the vehicle transmission is determined through the flow path, and the sub-demand flow of multiple components is compared to determine the maximum sub-demand flow; and then the maximum sub-demand flow is determined as the demand flow.

[0062] For example, assuming that the sub-demand flow rates of each component are 100 Lpm, 50 Lpm, and 3.33 Lpm, the sub-demand flow rates are compared to determine the maximum sub-demand flow rate, which is 100 Lpm, that is, the total demand flow rate is 100 Lpm.

[0063] Alternatively, using the maximum sub-demand flow rate as the required flow rate can simplify the cooling system's flow control logic. This eliminates the need to precisely adjust to the specific needs of each component at all times, ensuring the system can at least meet the highest demand. This is more feasible and easier to implement in practice.

[0064] As an optional embodiment, the sub-demand flow of each component in the vehicle transmission is determined based on the flow path, including: determining the distribution coefficient of each component in the vehicle transmission based on the flow path, and obtaining the predetermined demand flow of each component, wherein the distribution coefficient is used to indicate the weight of distributing cooling oil to each component, and the predetermined demand flow is used to indicate the preset sub-demand flow of each component; based on the distribution coefficient and the predetermined demand flow, the sub-demand flow of each component is determined.

[0065] In this embodiment, the distribution coefficients of the various components in the vehicle transmission are determined based on the flow path by querying the flow distribution table, and the predetermined required flow of each component is obtained through the cooling requirements of each component. For example, the flow requirement of the motor can be determined based on the driving power of the motor, or based on the motor temperature and oil temperature. This is only an illustrative example and does not limit the specific method of determining the predetermined required flow of each component.

[0066] Optionally, after the allocation coefficient and the predetermined required flow are determined, the sub-required flow of each component is determined by calculation.

[0067] For example, assuming that the flow distribution coefficients of each component are 0.1, 0.3, and 0.6 respectively, and the flow requirements of each component are 10Lpm, 15Lpm, and 2Lpm respectively, then the sub-demand flow of each component is calculated as 10 / 0.1=100Lpm, 15 / 0.3=50Lpm, and 2 / 0.6=3.33Lpm.

[0068] Optionally, by adjusting the distribution coefficient under different operating modes or conditions, the cooling oil flow can be dynamically optimized, making thermal management more precise and efficient. For example, under high load conditions, the distribution coefficient can be increased for critical heat sources to ensure they are adequately cooled.

[0069] As an optional embodiment, based on the demand flow, a control strategy of a vehicle transmission is determined, including: obtaining the starting status information of the vehicle's engine; in response to the starting status information indicating that the engine is in an abnormal starting state, determining that the control strategy is a first control strategy, wherein the first control strategy is used to indicate a rule for controlling the vehicle's electronic pump to start working and output the demand flow to the electronic pump; in response to the starting status being a normal starting state, obtaining the flow of the vehicle's mechanical pump; in response to the flow of the mechanical pump being greater than or equal to the demand flow, determining that the control strategy is a second control strategy, wherein the second control strategy is used to indicate a rule for controlling the vehicle's electronic pump to stop working; in response to the flow of the mechanical pump being less than the demand flow, determining a differential flow, wherein the differential flow is used to indicate the difference between the flow of the mechanical pump and the demand flow; based on the differential flow, determining that the control strategy is a third control strategy, wherein the third control strategy is used to indicate a rule for controlling the vehicle's electronic pump to start and output the differential flow to the electronic pump.

[0070] In this embodiment, the starting status information of the vehicle's engine is obtained, wherein the starting status information of the engine can also be referred to as the engine start status. When the starting status information indicates that the engine is in an abnormal starting state, that is, the engine has not started, it means that the cooling oil flow needs to be replenished in time by starting the electronic pump to ensure that the system cooling demand is met, and the control strategy is determined to be the first control strategy.

[0071] Optionally, when the startup state is a normal startup state, that is, the engine is in the start-up state, it means that the mechanical pump, as the main cooling oil supply source, can provide a stable cooling oil flow. Based on this, the flow of the vehicle's mechanical pump is obtained, and the control strategy is further determined according to the flow of the mechanical pump.

[0072] Optionally, when the flow rate of the mechanical pump is greater than or equal to the required flow rate, it indicates that the mechanical pump can provide sufficient cooling oil at this time. Based on this, the control strategy is determined to be the second control strategy.

[0073] For example, assuming that the total required flow rate is 15L and the current flow rate of the mechanical pump is 20L, it means that the mechanical pump can provide sufficient cooling oil at this time. Based on this, the second control strategy is to control the vehicle's electronic pump to stop working.

[0074] Optionally, when the flow of the mechanical pump is less than the required flow, it means that the mechanical pump cannot provide enough cooling oil at this time. Based on this, the differential flow is determined by the flow of the mechanical pump and the required flow, and then the control strategy is determined to be the third control strategy based on the differential flow.

[0075] For example, assuming the total required flow is 15L and the current flow of the mechanical pump is 5L, the difference flow is 10L. That is, the third control strategy is to control the vehicle's electronic pump to start and output 10L to the electronic pump.

[0076] Optionally, the total cooling oil flow rate is adjusted in real time based on the engine's starting status and the mechanical pump's flow rate, ensuring that the cooling oil supply always matches the transmission's cooling needs. This helps quickly respond to changing driving conditions and maintain the transmission's temperature within the optimal range.

[0077] As an optional embodiment, a method for determining a control strategy for a vehicle transmission includes: obtaining valve body throttle hole information of the vehicle, wherein the valve body throttle hole information is used to control the size of an opening or hole for controlling the flow of cooling oil; and determining a distribution coefficient of each of the components in the vehicle transmission based on the valve body throttle hole information.

[0078] In this embodiment, information about the vehicle's valve body orifice is obtained and used to determine the distribution coefficients for each component in the vehicle's transmission. The design of the valve body orifice affects the distribution of cooling oil among different components; its size, shape, and location determine the resistance to coolant flow and the flow distribution. By obtaining and analyzing this orifice information, the distribution coefficients for each component can be determined.

[0079] For example, fluid dynamics simulation software can be used to simulate the effect of different valve body orifice configurations on cooling oil flow. By analyzing this simulation data, it is possible to quantify how much cooling oil should be distributed to each component under specific conditions, thereby determining a preliminary distribution coefficient.

[0080] Alternatively, the size of the orifice directly determines the flow rate and volume of cooling oil. By adjusting the distribution coefficient, the cooling oil can be more precisely directed to components with high thermal loads, such as the generator, drive motor, or specific gear sets, ensuring they remain within a safe temperature range even under high operating intensity.

[0081] It should be noted that the above embodiment can be executed by a device for determining a control strategy of a vehicle transmission.

[0082] In this embodiment, the operating mode of a vehicle's hybrid system is determined; based on the operating mode, a flow path of cooling oil flowing through the vehicle transmission is determined, where the flow path represents the path of cooling oil flowing within the components of the vehicle transmission; based on the flow path, a required flow rate of the vehicle transmission is determined, where the required flow rate indicates the total flow rate of cooling oil required to flow through the components of the vehicle transmission per unit time; and based on the required flow rate, a control strategy for the vehicle transmission is determined, where the control strategy indicates the rules for controlling the flow rate of cooling oil during operation of the vehicle transmission. In other words, in this embodiment of the present invention, the cooling oil flow path is determined based on the vehicle's hybrid system operating mode, and the required flow rate of the vehicle transmission is determined based on the flow path, thereby determining the control strategy for the vehicle transmission. This solves the technical problem of being unable to accurately distribute cooling oil to the vehicle transmission and achieves the technical effect of accurately distributing cooling oil to the vehicle transmission.

[0083] The technical solutions of the embodiments of the present invention are described below with reference to preferred implementation methods.

[0084] In hybrid electric vehicles (HEVs), the thermal management system (TMS) is a key component affecting vehicle comfort and safety. Its primary function is to maintain core components such as the engine, motor, and battery within their optimal operating temperature range. For HEVs using dedicated hybrid transmissions, the compact design and small size of these transmissions require the integration of more electronic components within the limited space, further increasing the heat dissipation requirements of the TMS.

[0085] In the related art, hybrid electric vehicle thermal management systems on the market generally adopt a fixed flow distribution method, that is, cooling each subsystem through a fixed flow distribution path. However, this fixed flow distribution method has the following problems: First, because hybrid electric vehicles need to meet different cooling requirements in different operating modes (such as pure electric mode, hybrid mode, and engine drive mode), if a fixed flow distribution method is used, it is difficult to accurately meet the cooling needs of each subsystem; second, the cooling requirements of hybrid electric vehicles in different operating modes also vary significantly. Therefore, if a fixed flow distribution method is used, it is difficult to achieve efficient utilization of the cooling system; finally, the operating state of the cooling system of hybrid electric vehicles in different operating modes also varies. Therefore, if a fixed flow distribution method is used, it is difficult to effectively monitor and maintain the cooling system. Therefore, there is a technical problem of being unable to accurately distribute cooling oil to the vehicle transmission. To address the above technical problems of being unable to accurately distribute cooling oil to the vehicle transmission, no effective solution has been proposed.

[0086] However, embodiments of the present invention propose a hybrid transmission thermal management flow control method, which includes a flow distribution solenoid valve that dynamically adjusts the cooling oil flow direction, a flow demand calculation module that calculates the cooling oil flow requirements of each subsystem, and a flow execution plan decision module that determines the optimal cooling oil flow execution plan based on system operating conditions. This method accurately distributes cooling oil to accommodate different operating modes through solenoid valve position control. Furthermore, the cooling oil flow rate is adjusted based on real-time monitoring of the engine startup status and internal system temperature to ensure that the cooling requirements of each subsystem are met. This method solves the technical problem of inability to accurately distribute cooling oil to vehicle transmissions, achieving the technical effect of precisely distributing cooling oil to vehicle transmissions.

[0087] The following is a further introduction to the embodiments of the present invention.

[0088] Figure 2 Schematic diagram of a hybrid transmission structure according to an embodiment of the present invention. Figure 2 As shown, L represents a clutch, C represents a generator, A represents an engine, and M represents a drive motor.

[0089] In this embodiment, the clutch connects and disconnects the engine and drivetrain. Specifically, in hybrid vehicles, it controls power transmission between the engine and electric motor, enabling smooth switching between power sources. In hybrid mode, precise clutch control is key to efficient energy management and power distribution.

[0090] Optionally, the generator plays multiple roles in a hybrid system, including, but not limited to, converting mechanical energy into electrical energy during vehicle deceleration or braking to charge the battery, and, under certain operating conditions, serving as an auxiliary power source for the electric motor, contributing to the vehicle's power output. It can also regulate engine speed, absorbing excess energy through power generation to maintain engine operation within its most efficient range.

[0091] Alternatively, the engine is the vehicle's traditional power source, capable of driving the vehicle independently or in conjunction with the electric motor. In a hybrid-specific transmission, the engine's output not only needs to be transmitted to the wheels via a gear system but also needs to be managed and distributed with the electric motor's power. The engine's operating status and output power directly impact the efficiency and responsiveness of the entire powertrain.

[0092] The electric motor is the electrical power source for hybrid vehicles, either directly driving the vehicle or contributing to the powertrain along with the engine. Efficient operation of the electric motor requires precise cooling management to avoid overheating that could degrade performance or cause damage.

[0093] Figure 3 Schematic diagram of the hydraulic principle of a hybrid transmission according to an embodiment of the present invention. Figure 3 The diagram shows a mechanical pump, an electronic pump, a flow distribution solenoid valve, and three cooling paths (shaft gear, drive motor, and generator). The flow distribution solenoid valve has three positions: left: directs all input flow to the drive motor; center: distributes input flow to the generator and drive motor based on the orifice characteristics; and right: directs all input flow to the generator. The mechanical pump is connected to the engine. When the engine starts, it drives the mechanical pump. The flow rate of the mechanical pump is related to the engine speed, with higher speeds increasing the flow rate. The electronic pump is controlled on demand by a controller. Flow to the shaft gear path is naturally regulated by the orifice.

[0094] Figure 4 FIG. 1 is a flow chart of a method for controlling a position of a flow distribution solenoid valve according to an embodiment of the present invention. Figure 4 As shown, the flow distribution solenoid valve position control method includes the following steps:

[0095] Step S401: Acquire the hybrid mode of the vehicle.

[0096] In this embodiment, the hybrid mode of the vehicle is obtained.

[0097] Step S402: determine whether the hybrid mode is the parallel mode.

[0098] In this embodiment, it is determined whether the hybrid mode is the parallel mode. When the hybrid mode is the parallel mode, step S407 is executed; when the hybrid mode is not the parallel mode, step S403 is executed.

[0099] Step S403: determine whether the hybrid mode is the series mode.

[0100] In this embodiment, it is determined whether the hybrid mode is the series mode. When the hybrid mode is the series mode, step S405 is executed; when the hybrid mode is not the series mode, step S404 is executed.

[0101] Step S404: the solenoid valve is located on the left.

[0102] In this embodiment, the solenoid valve is located on the left.

[0103] Step S405: Obtain vehicle speed.

[0104] In this embodiment, the vehicle speed is acquired.

[0105] Step S406: determine whether the vehicle speed is less than a vehicle speed threshold.

[0106] In this embodiment, it is determined whether the vehicle speed is less than the vehicle speed threshold. When the vehicle speed is less than the vehicle speed threshold by 5 kph, step S408 is executed. When the vehicle speed is not less than the vehicle speed threshold by 5 kph, step S407 is executed.

[0107] Step S407: the solenoid valve is located in the middle.

[0108] In this embodiment, the position of the solenoid valve is in the middle.

[0109] Step S408: the solenoid valve is located on the right.

[0110] In this embodiment, the solenoid valve is located on the right.

[0111] Figure 5 is a flow chart of a method for calculating total flow demand according to an embodiment of the present invention. Figure 5 As shown, the total flow demand calculation method includes the following steps:

[0112] Step S501, obtaining the position of the solenoid valve.

[0113] In this embodiment, the position of the vehicle's solenoid valve is acquired.

[0114] Step S502: determining the distribution coefficients of the generator, the drive motor, and the shaft gear respectively.

[0115] In this embodiment, the distribution coefficients of the generator, the drive motor, and the shaft gear are determined by looking up a flow distribution table.

[0116] Step S503: obtaining preset flow requirements of the generator, the drive motor, and the shaft gear respectively.

[0117] In this embodiment, the preset flow requirements of the generator, the drive motor, and the shaft gear are determined according to the cooling requirements of the respective components.

[0118] Step S504 , determining the required flow rates of the generator, the drive motor, and the shaft gear respectively.

[0119] In this embodiment, the distribution coefficient is calculated with the preset flow requirement to determine the actual required flow of the generator, the drive motor and the shaft gear.

[0120] Step S505: determining the total required flow of the transmission.

[0121] In this embodiment, the required flows of the generator, the drive motor, and the shaft gear are compared to determine the total required flow of the transmission.

[0122] Figure 6 FIG. 1 is a flow chart of a method for calculating a flow execution solution according to an embodiment of the present invention. Figure 6 As shown, the flow execution scheme calculation method includes the following steps:

[0123] Step S601, obtaining the vehicle engine startup status.

[0124] In this embodiment, the engine startup status of the vehicle is obtained.

[0125] Step S602: Determine whether the engine is started.

[0126] In this embodiment, it is determined whether the engine is started. When the engine is started, step S603 is executed. When the engine is not started, step S606 is executed.

[0127] Step S603: determine whether the mechanical pump meets the flow requirement.

[0128] In this embodiment, it is determined whether the mechanical pump meets the flow requirement. When the mechanical pump meets the flow requirement, step S605 is executed; when the mechanical pump does not meet the flow requirement, step S604 is executed.

[0129] Step S604: Request the electronic pump to start, and distribute the insufficient flow to the electronic pump.

[0130] In this embodiment, the electronic pump is requested to start, and the flow rate that is lacking in the mechanical pump is determined, and the lacking flow rate is allocated to the electronic pump.

[0131] Step S605: Request the electronic pump to stop.

[0132] In this embodiment, the electronic pump is controlled to be stopped.

[0133] Step S606 , requesting the electronic pump to start, and outputting the total flow demand to the electronic pump.

[0134] In this embodiment, the electronic pump is controlled to start, and the total flow demand is output to the electronic pump.

[0135] Optionally, when the engine is started, the mechanical pump serves as the primary source of cooling oil, providing a stable cooling oil flow. If the engine is not started or the mechanical pump's flow is insufficient, the electronic pump activates to promptly replenish the cooling oil flow, ensuring that the system's cooling needs are met. This mechanism coordinates the operation of the mechanical and electronic pumps and dynamically adjusts the position of the flow distribution solenoid valve to achieve on-demand cooling oil supply, effectively resolving the issue of insufficient or excessive cooling oil flow and improving the system's energy efficiency and thermal management. The flexibility of the decision-making mechanism is also reflected in its ability to intelligently select the most appropriate cooling oil supply solution based on real-time system status and external conditions. For example, when driving at low speeds or parked, the system can reduce cooling oil flow to lower energy consumption, while also ensuring the cooling needs of key components through fine-tuning of the solenoid valve.

[0136] This embodiment includes a flow distribution solenoid valve that dynamically adjusts the cooling oil flow direction, a flow demand calculation module that calculates the cooling oil flow requirements of each subsystem, and a flow execution plan decision module that determines the optimal cooling oil flow execution plan based on system operating conditions. By controlling the position of the solenoid valve, the system accurately distributes cooling oil to suit different operating modes. Furthermore, the system adjusts the cooling oil flow rate based on real-time monitoring of the engine startup status and internal system temperature to ensure that the cooling needs of each subsystem are met. This solves the technical problem of accurately distributing cooling oil to vehicle transmissions and achieves the technical effect of accurately distributing cooling oil to vehicle transmissions.

[0137] According to an embodiment of the present invention, a device for determining a control strategy of a vehicle transmission is also provided. It should be noted that the device for determining a control strategy of a vehicle transmission can be used to execute the method for determining a control strategy of a vehicle transmission in the method embodiment.

[0138] Figure 7 FIG. 1 is a schematic diagram of a device for determining a control strategy for a vehicle transmission according to an embodiment of the present invention. Figure 7 As shown, the device 700 for determining the control strategy of the vehicle transmission may include: a first determining unit 701 , a second determining unit 702 , a third determining unit 703 and a fourth determining unit 704 .

[0139] The first determining unit 701 is configured to determine an operating mode entered by a hybrid system of a vehicle.

[0140] The second determining unit 702 is configured to determine a flow path of cooling oil flowing in a vehicle transmission of the vehicle based on the operating mode, wherein the flow path is used to represent a path of cooling oil flowing within a component of the vehicle transmission.

[0141] The third determining unit 703 is configured to determine a required flow rate of the vehicle transmission based on the flow path, wherein the required flow rate is used to indicate a total flow rate of cooling oil that needs to flow through components of the vehicle transmission per unit time.

[0142] The fourth determining unit 704 is configured to determine a control strategy for the vehicle transmission based on the required flow rate, wherein the control strategy is configured to indicate a rule for controlling the flow rate of the cooling oil during operation of the vehicle transmission.

[0143] Optionally, the second determination unit 702 may include: a first determination module for determining that the flow path is a first flow path in response to the operating mode being a parallel mode, wherein the first flow path is used to indicate the paths through which the cooling oil flows to the generator and the drive motor in the vehicle transmission, respectively; a first acquisition module for acquiring the vehicle speed in response to the operating mode being a series mode; a second determination module for determining that the flow path is the first flow path in response to the vehicle speed being greater than or equal to a vehicle speed threshold; a third determination module for determining that the flow path through which the cooling oil flows in the vehicle transmission is a second flow path in response to the vehicle speed being less than the vehicle speed threshold, wherein the second flow path is used to indicate the path through which the cooling oil flows to the generator in the vehicle transmission; a fourth determination module for determining that the flow path through which the cooling oil flows in the vehicle transmission is a third flow path in response to the operating mode being a target mode other than the series mode and the parallel mode, wherein the third flow path is used to indicate the path through which the cooling oil flows to the drive motor in the vehicle transmission.

[0144] Optionally, the third determination unit 703 may include: a fifth determination module, used to determine the sub-demand flow of each component in the vehicle transmission based on the flow path, wherein the sub-demand flow is used to indicate the flow rate of cooling oil that needs to flow through each component of the vehicle transmission per unit time; a sixth determination module, used to determine the maximum sub-demand flow from the sub-demand flows of multiple components; and a seventh determination module, used to determine the maximum sub-demand flow as the demand flow.

[0145] Optionally, the fifth determination module may include: a first determination submodule, used to determine the distribution coefficient of each component in the vehicle transmission based on the flow path, and obtain the predetermined required flow of each component, wherein the distribution coefficient is used to indicate the weight of distributing cooling oil to each component, and the predetermined required flow is used to indicate the preset sub-required flow of each component; a second determination submodule, used to determine the sub-required flow of each component based on the distribution coefficient and the predetermined required flow.

[0146] Optionally, the fifth determination module may include: a second acquisition module for acquiring the starting status information of the vehicle's engine; in response to the starting status information indicating that the engine is in an abnormal starting state, determining that the control strategy is the first control strategy, wherein the first control strategy is used to indicate the rule for controlling the vehicle's electronic pump to start working and output the required flow to the electronic pump; an eighth determination module for acquiring the flow of the vehicle's mechanical pump in response to the starting status being a normal starting state; a ninth determination module for determining that the control strategy is the second control strategy in response to the flow of the mechanical pump being greater than or equal to the required flow, wherein the second control strategy is used to indicate the rule for controlling the vehicle's electronic pump to stop working; a tenth determination module for determining the differential flow in response to the flow of the mechanical pump being less than the required flow, wherein the differential flow is used to indicate the difference between the flow of the mechanical pump and the required flow; an eleventh determination module for determining that the control strategy is the third control strategy based on the differential flow, wherein the third control strategy is used to indicate the rule for controlling the vehicle's electronic pump to start and output the differential flow to the electronic pump.

[0147] Optionally, the device 700 for determining the control strategy of the vehicle transmission may further include: an acquisition unit for acquiring valve body throttle hole information of the vehicle, wherein the valve body throttle hole information is used to control the size of the opening or hole for the flow of cooling oil; and a fifth determination unit for determining the distribution coefficient of each of the components in the vehicle transmission based on the valve body throttle hole information.

[0148] In this embodiment, the operating mode of a vehicle's hybrid system is determined; based on the operating mode, a flow path of cooling oil flowing through the vehicle transmission is determined, where the flow path represents the path of cooling oil flowing within the components of the vehicle transmission; based on the flow path, a required flow rate of the vehicle transmission is determined, where the required flow rate indicates the total flow rate of cooling oil required to flow through the components of the vehicle transmission per unit time; and based on the required flow rate, a control strategy for the vehicle transmission is determined, where the control strategy indicates the rules for controlling the flow rate of cooling oil during operation of the vehicle transmission. In other words, in this embodiment of the present invention, the cooling oil flow path is determined based on the vehicle's hybrid system operating mode, and the required flow rate of the vehicle transmission is determined based on the flow path, thereby determining the control strategy for the vehicle transmission. This solves the technical problem of being unable to accurately distribute cooling oil to the vehicle transmission and achieves the technical effect of accurately distributing cooling oil to the vehicle transmission.

[0149] According to an embodiment of the present invention, a computer-readable storage medium is further provided. The storage medium includes a stored program, wherein the program executes the method for determining the control strategy of a vehicle transmission in the method embodiment.

[0150] Computer-readable storage media may also be referred to as computer storage media. They may include data signals transmitted in baseband or as part of a carrier wave, carrying readable program code. Such transmitted data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable storage media may transmit, propagate, or transfer programs for use by or in conjunction with an instruction execution system, apparatus, or device.

[0151] The program code contained in the computer-readable storage medium can be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, radio frequency, etc., or any suitable combination of the foregoing.

[0152] According to an embodiment of the present invention, a processor is further provided. The processor is configured to run a program, wherein when the program is run, the method for determining a control strategy of a vehicle transmission in the method embodiment is executed.

[0153] An embodiment of the present application also provides a vehicle. Figure 8 is a schematic diagram of a vehicle according to an embodiment of the present invention, such as Figure 8 As shown, vehicle 800 may include a memory 810 and a processor 820. The memory 810 is used to store computer programs, and the processor 820 is used to execute the programs stored in the memory 810 to implement the method for determining a vehicle transmission control strategy of the present application. The serial numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0154] In this application, a plurality refers to two or more.

[0155] In this application, unless otherwise expressly defined, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of these terms in this application.

[0156] The terms "first," "second," "third," "fourth," etc. (if any) in this application are used to distinguish similar objects and are not necessarily used to describe a particular sequential order.

[0157] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0158] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly. For example, the method for determining the control strategy of a vehicle transmission of the present application may include step S101 and step S102, which means that the method for determining the control strategy of a vehicle transmission of the present application may include steps S101 and S102 performed sequentially, or may include steps S102 and S101 performed sequentially.

[0159] For example, the method for determining the control strategy of the vehicle transmission of the present application may further include step S103, indicating that step S103 may be added to the method in any order. For example, the method for determining the control strategy of the vehicle transmission of the present application may include step S101, step S102 and step S103, or may include step S101, step S103 and step S102, or may include step S103, step S101 and step S102, etc. This is merely an example and is not specifically limited.

[0160] For example, the method for determining the control strategy of the vehicle transmission of the present application may further include step S104, indicating that step S104 may be added to the method in any order. For example, the method for determining the control strategy of the vehicle transmission of the present application may include step S101, step S102, step S103 and step S104, or may include step S101, step S104, step S103 and step S102, or may include step S104, step S103, step S101 and step S102, etc. This is merely an example and is not specifically limited.

[0161] According to an embodiment of the present invention, a computer program product is further provided. The computer program product includes a computer program. When the computer program is executed by a processor, the method for determining the control strategy of the vehicle transmission in the embodiment is implemented.

[0162] According to an embodiment of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium is used to store a computer program, and when the computer program is executed by a processor, the method for determining the control strategy of the vehicle transmission in the embodiment is implemented.

[0163] According to an embodiment of the present invention, a computer program is further provided. When the computer program is executed by a processor, the method for determining the control strategy of the vehicle transmission in the embodiment is implemented.

[0164] Optionally, the computer program implements the following program code when executed by the processor: determining the operating mode entered by the hybrid system of the vehicle; based on the operating mode, determining the flow path of the cooling oil flowing in the vehicle transmission of the vehicle, wherein the flow path is used to represent the path of the cooling oil flowing in the components of the vehicle transmission; based on the flow path, determining the required flow of the vehicle transmission, wherein the required flow is used to indicate the total flow rate of cooling oil that needs to flow through the components of the vehicle transmission per unit time; based on the required flow, determining the control strategy of the vehicle transmission, wherein the control strategy is used to indicate the rules for controlling the flow of cooling oil during the operation of the vehicle transmission.

[0165] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0166] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, and can be electrical or other forms.

[0167] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected to achieve the purpose of the present embodiment according to actual needs.

[0168] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0169] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent functional component, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software functional component, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0170] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining a control strategy for a vehicle transmission, characterized in that: include: Determine the operating mode entered by the vehicle's hybrid system; determining a flow path for cooling oil to flow in a vehicle transmission of the vehicle based on the operating mode, wherein the flow path is used to represent a path for the cooling oil to flow within a component of the vehicle transmission; determining a required flow rate of the vehicle transmission based on the flow path, wherein the required flow rate is used to indicate a total flow rate of the cooling oil that needs to flow through components of the vehicle transmission per unit time; Based on the required flow rate, a control strategy of the vehicle transmission is determined, wherein the control strategy is used to indicate a rule for controlling the flow rate of the cooling oil during operation of the vehicle transmission.

2. The method according to claim 1, characterized in that Determining a flow path for cooling oil to flow in a vehicle transmission based on the operating mode includes: In response to the operating mode being the parallel mode, determining the flow path to be a first flow path, wherein the first flow path is used to indicate a path for the cooling oil to flow to a generator and a drive motor in the vehicle transmission, respectively; In response to the operating mode being the series mode, obtaining a vehicle speed of the vehicle; In response to the vehicle speed being greater than or equal to a vehicle speed threshold, determining the flow path to be the first flow path; In response to the vehicle speed being less than a vehicle speed threshold, determining that the flow path of the cooling oil flowing in the vehicle transmission is a second flow path, wherein the second flow path is used to indicate a path of the cooling oil flowing to a generator in the vehicle transmission; In response to the operating mode being a target mode other than the series mode and the parallel mode, the flow path of the cooling oil flowing in the vehicle transmission is determined to be a third flow path, wherein the third flow path is used to indicate a path of the cooling oil flowing to a drive motor in the vehicle transmission.

3. The method according to claim 1, characterized in that Determining a required flow rate of the vehicle transmission based on the flow path includes: determining a sub-required flow rate of each component in the vehicle transmission based on the flow path, wherein the sub-required flow rate is used to indicate an amount of flow of the cooling oil that needs to flow through each component of the vehicle transmission per unit time; determining a maximum sub-demand flow rate from among the sub-demand flows of the plurality of components; The maximum sub-demand flow is determined as the demand flow.

4. The method according to claim 3, characterized in that Determining sub-required flow rates of various components in the vehicle transmission based on the flow paths includes: Based on the flow path, determining a distribution coefficient for each of the components in the vehicle transmission, and obtaining a predetermined required flow rate for each of the components, wherein the distribution coefficient is used to indicate a weight for distributing the cooling oil to each of the components, and the predetermined required flow rate is used to indicate a preset sub-required flow rate for each of the components; The sub-required flows of the respective components are determined based on the allocation coefficients and the predetermined required flows.

5. The method according to claim 1, wherein Determining a control strategy for the vehicle transmission based on the required flow rate includes: Acquiring startup status information of the engine of the vehicle; In response to the startup state information indicating that the engine is in an abnormal startup state, determining that the control strategy is a first control strategy, wherein the first control strategy is used to represent a rule for controlling an electronic pump of the vehicle to start operating and output the required flow rate to the electronic pump; In response to the startup state being a normal startup state, obtaining a flow rate of a mechanical pump of the vehicle; In response to the flow rate of the mechanical pump being greater than or equal to the required flow rate, determining that the control strategy is a second control strategy, wherein the second control strategy is used to represent a rule for controlling the electronic pump of the vehicle to stop working; In response to the flow rate of the mechanical pump being less than the required flow rate, determining a differential flow rate, wherein the differential flow rate is used to indicate a difference between the flow rate of the mechanical pump and the required flow rate; Based on the differential flow rate, the control strategy is determined to be a third control strategy, wherein the third control strategy is used to represent a rule for controlling the start of an electronic pump of the vehicle and outputting the differential flow rate to the electronic pump.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: Acquiring valve body throttle hole information of the vehicle, wherein the valve body throttle hole information is used to control the size of the opening or hole for the flow of the cooling oil; Based on the valve body orifice information, a distribution coefficient for each of the components in the vehicle transmission is determined.

7. A device for determining a control strategy for a vehicle transmission, characterized in that: include: a first determining unit, configured to determine an operating mode entered by a hybrid system of the vehicle; a second determining unit configured to determine a flow path of cooling oil flowing in a vehicle transmission of the vehicle based on the operating mode, wherein the flow path is used to represent a path of the cooling oil flowing within a component of the vehicle transmission; a third determining unit, configured to determine a required flow rate of the vehicle transmission based on the flow path, wherein the required flow rate is used to indicate a total flow rate of the cooling oil that needs to flow through components of the vehicle transmission per unit time; A fourth determining unit is configured to determine a control strategy for the vehicle transmission based on the required flow rate, wherein the control strategy is configured to indicate a rule for controlling the flow rate of the cooling oil during operation of the vehicle transmission.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein when the program is executed by a processor, the device where the storage medium is located is controlled to execute the method for determining the control strategy of a vehicle transmission according to any one of claims 1 to 6.

9. A processor, characterized in that: The processor is used to run a program, wherein when the program is run, the method for determining the control strategy of a vehicle transmission according to any one of claims 1 to 6 is executed.

10. A vehicle, characterized in that: include: a memory storing an executable program; A processor is used to run the program, wherein when the program is run, the method for determining the control strategy of the vehicle transmission according to any one of claims 1 to 6 is executed.

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