Oil temperature determination method and device, equipment, storage medium and product

Abstract

The invention belongs to the technical field of automobiles, and discloses an oil temperature determination method and device, equipment, a storage medium and a product. The method comprises the following steps: determining a mapping relation among environment information, oil pump motor rotating speed and oil temperature of a to-be-detected vehicle in a development process, and then obtaining current environment information and current oil pump motor rotating speed of the to-be-detected vehicle at a current moment; and determining the current oil temperature of the to-be-detected vehicle at the current moment based on the current environment information, the current oil pump motor rotating speed and the mapping relation. According to the method, the mapping relation among the environment information, the oil pump motor rotating speed and the oil temperature of the to-be-detected vehicle in the development process is firstly determined, so that the mapping relation among the environment information, the oil pump motor rotating speed and the oil temperature can be effectively determined in the development process of the to-be-detected vehicle; and the current oil temperature corresponding to the to-be-detected vehicle is accurately and effectively obtained based on the current environment information, the current oil pump motor rotating speed and the mapping relation, so that oil temperature acquisition by using an oil temperature sensor can be avoided, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to an oil temperature determination method, device, equipment, storage medium and product. Background Art

[0002] As the proportion of hybrid and pure electric drive powertrains increases, the cooling demand for motors is also increasing. Traditional air cooling and water cooling cannot meet the needs of motors. Instead, oil-cooled motors are used. For hybrid electric drive vehicles, it is usually necessary to obtain the oil temperature signal inside the electric drive, which can be used to formulate the working condition strategy of the cooling and lubrication system, the power limit of the electric drive, etc. When the oil temperature is high, it is necessary to limit the motor power, reduce the heat generation, and avoid damage to the motor and other components. However, oil temperature sensors are usually used to collect the temperature inside the oil circuit and feed the temperature back to the corresponding controller. The controller determines the speed and output power of the cooling and lubricating oil pump based on the oil temperature and other signals, resulting in high costs and the risk of oil leakage in the oil channel. Therefore, how to accurately and effectively determine the vehicle oil temperature without using an oil temperature sensor and reduce costs has become an urgent problem to be solved. Summary of the invention

[0003] The main purpose of this application is to provide an oil temperature determination method, device, equipment, storage medium and product, aiming to solve the technical problem of how to accurately and effectively determine the vehicle oil temperature without using an oil temperature sensor and reduce costs.

[0004] To achieve the above object, the present application provides a method for determining oil temperature, which comprises the following steps:

[0005] Determine the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be tested during the development process;

[0006] Obtaining current environmental information and current oil pump motor speed of the vehicle to be detected at the current moment;

[0007] The current oil temperature of the vehicle to be detected at the current moment is determined based on the current environmental information, the current oil pump motor speed and the mapping relationship.

[0008] Optionally, the step of determining the mapping relationship between the environmental information, the oil pump motor speed, and the oil temperature of the vehicle to be tested during the development process specifically includes:

[0009] Determine the environmental information variables and the oil pump motor speed variables corresponding to the internal heat, heat exchange heat, and radiation heat generated by the vehicle to be tested during the development process;

[0010] Collecting the oil temperature variable of the vehicle to be tested during the development process through an oil temperature sensor;

[0011] A mapping relationship among the environmental information, the oil pump motor speed and the oil temperature is determined according to the environmental information variable, the oil pump motor speed variable and the oil temperature variable.

[0012] Optionally, the step of determining the environmental information variables and the oil pump motor speed variables corresponding to the internal heat, heat exchange heat and radiation heat generated by the vehicle to be tested during the development process specifically includes:

[0013] Determine the internal heat generated by the vehicle to be tested during the development process, the internal heat includes: the heat generated by the motor, the heat dissipated by the power device of the motor controller, and the heat generated by the gear oiling;

[0014] Determining the heat exchange amount generated by the vehicle under test during the development process;

[0015] Determine the radiant heat generated by the vehicle to be tested during the development process, wherein the radiant heat includes: radiant heat of electric drive, heat of heat convection exchange, and radiant heat of the engine;

[0016] Determine the environmental information variables and oil pump motor speed variables corresponding to the motor heat generation, the heat dissipation of the power device of the motor controller, the heat of the gear oiling, the heat exchange heat, the radiation heat of the electric drive, the heat convection exchange heat and the engine radiation heat.

[0017] Optionally, the environmental information variables include: motor power variables, driving mode variables, vehicle speed variables, water inlet temperature variables, water outlet temperature variables, cooling water flow variables, ambient temperature variables and engine temperature variables;

[0018] The step of determining the environmental information variables and the oil pump motor speed variables corresponding to the motor heat generation, the power device heat dissipation of the motor controller, the gear oiling heat, the heat exchange heat, the electric drive radiation heat, the heat convection exchange heat, and the engine radiation heat specifically includes:

[0019] Determine the motor power variable, the driving mode variable, and the vehicle speed variable corresponding to the motor heat generation, the heat dissipation of the power device of the motor controller, and the heat of the gear oiling;

[0020] Determine the water inlet temperature variable, the water outlet temperature variable, the cooling water flow variable, and the oil pump motor speed variable corresponding to the heat exchange heat;

[0021] The ambient temperature variable, the vehicle speed variable, and the engine temperature variable corresponding to the radiant heat of the electric drive, the heat of the heat convection exchange, and the radiant heat of the engine are determined.

[0022] Optionally, the step of determining the motor power variable, the driving mode variable and the vehicle speed variable corresponding to the motor heat generation, the heat dissipation of the power device of the motor controller and the heat of the gear oiling specifically includes:

[0023] Determine the motor power variable corresponding to the heat generated by the motor and the heat dissipated by the power device of the motor controller;

[0024] Determine the driving mode variable and the vehicle speed variable corresponding to the heat of the gear refueling.

[0025] Optionally, the step of determining the ambient temperature variable, the vehicle speed variable, and the engine temperature variable corresponding to the radiant heat of the electric drive, the heat of the heat convection exchange, and the radiant heat of the engine specifically includes:

[0026] Determining the ambient temperature variable corresponding to the radiant heat of the electric drive;

[0027] Determine the ambient temperature variable and the vehicle speed variable corresponding to the heat exchanged by the heat convection;

[0028] The engine temperature variable corresponding to the engine radiant heat is determined.

[0029] In addition, to achieve the above-mentioned purpose, the present application also provides an oil temperature determination device, the oil temperature determination device comprising:

[0030] A mapping relationship determination module is used to determine the mapping relationship between the environmental information of the vehicle to be tested, the oil pump motor speed and the oil temperature during the development process;

[0031] An information determination module, used to obtain the current environmental information and the current oil pump motor speed of the vehicle to be detected at the current moment;

[0032] The oil temperature determination module is used to determine the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, the current oil pump motor speed and the mapping relationship.

[0033] In addition, to achieve the above-mentioned purpose, the present application also proposes an oil temperature determination device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the oil temperature determination method as described above.

[0034] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the oil temperature determination method described above are implemented.

[0035] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the oil temperature determination method as described above are implemented.

[0036] The present application determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process, then obtains the current environmental information and current oil pump motor speed of the vehicle to be detected at the current moment, and then determines the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, current oil pump motor speed and the mapping relationship. The present application first determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process, and can effectively determine the mapping relationship between the environmental information, oil pump motor speed and oil temperature during the development process of the vehicle to be detected, and then obtains the current environmental information and current oil pump motor speed of the vehicle to be detected during the actual operation process, and then accurately and effectively obtains the current oil temperature corresponding to the vehicle to be detected based on the current environmental information, current oil pump motor speed and the mapping relationship. Compared with the existing method of collecting oil temperature through an oil temperature sensor, the above method of the present application can avoid using an oil temperature sensor to collect oil temperature, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0039] Figure 1 This is a flow chart of the first embodiment of the oil temperature determination method of the present application;

[0040] Figure 2 This is a flow chart of a second embodiment of the oil temperature determination method of the present application;

[0041] Figure 3 This is a structural block diagram of the first embodiment of the oil temperature determination device of the present application;

[0042] Figure 4It is a structural diagram of an oil temperature determination device in a hardware operating environment involved in an embodiment of the present application.

[0043] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0045] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0046] The main solution of the embodiment of the present application is: determine the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be tested during the development process; obtain the current environmental information and current oil pump motor speed of the vehicle to be tested at the current moment; based on the current environmental information, the current oil pump motor speed and the mapping relationship, determine the current oil temperature of the vehicle to be tested at the current moment.

[0047] As the proportion of hybrid and pure electric drive powertrains increases, the cooling demand for motors is also increasing. Traditional air cooling and water cooling cannot meet the needs of motors. Instead, oil-cooled motors are used. For hybrid electric drive vehicles, it is usually necessary to obtain the oil temperature signal inside the electric drive, which can be used to formulate the working condition strategy of the cooling and lubrication system, the power limit of the electric drive, etc. When the oil temperature is high, it is necessary to limit the motor power and reduce the heat generation to avoid damage to the motor and other components. However, oil temperature sensors are usually used to collect the temperature inside the oil circuit and feed the temperature back to the corresponding controller. The controller determines the speed and output power of the cooling lubrication oil pump based on the oil temperature and other signals, resulting in high costs and the risk of oil leakage in the oil channel.

[0048] The present application determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process, then obtains the current environmental information and current oil pump motor speed of the vehicle to be detected at the current moment, and then determines the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, current oil pump motor speed and the mapping relationship. The present application first determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process, and can effectively determine the mapping relationship between the environmental information, oil pump motor speed and oil temperature during the development process of the vehicle to be detected, and then obtains the current environmental information and current oil pump motor speed of the vehicle to be detected during the actual operation process, and then accurately and effectively obtains the current oil temperature corresponding to the vehicle to be detected based on the current environmental information, current oil pump motor speed and the mapping relationship. Compared with the existing method of collecting oil temperature through an oil temperature sensor, the above method of the present application can avoid using an oil temperature sensor to collect oil temperature, thereby reducing costs.

[0049] It should be noted that the executor of the present application may be a vehicle control unit (VCU), a microcontroller unit (MCU), etc.

[0050] Based on this, the present application embodiment provides a method for determining oil temperature, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the oil temperature determination method of the present application.

[0051] In this embodiment, the oil temperature determination method includes the following steps:

[0052] Step S10: Determine the mapping relationship between the environmental information, the oil pump motor speed and the oil temperature of the vehicle to be tested during the development process.

[0053] It can be understood that the vehicle to be tested refers to the vehicle whose oil circuit temperature needs to be determined. The mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be tested during the development process can be determined. The development process refers to the process of the vehicle to be tested during the development stage. The environmental information may include ambient temperature, engine temperature and other information.

[0054] Step S20: obtaining the current environmental information and the current oil pump motor speed of the vehicle to be detected at the current moment.

[0055] It should be understood that the current moment may be the moment when the vehicle to be tested is in the formal operation process, the current environmental information refers to the environmental information at the current moment, the current environmental information should be the same as the information included in the above environmental information, and the current oil pump motor speed refers to the oil pump motor speed at the current moment.

[0056] Step S30: determining the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, the current oil pump motor speed and the mapping relationship.

[0057] In a specific implementation, the current environmental information and the current oil pump motor speed are searched for a mapping relationship to obtain the corresponding current oil temperature.

[0058] This embodiment determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process, then obtains the current environmental information and current oil pump motor speed of the vehicle to be detected at the current moment, and then determines the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, current oil pump motor speed and the mapping relationship. This embodiment first determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process, and can effectively determine the mapping relationship between the environmental information, oil pump motor speed and oil temperature during the development process of the vehicle to be detected, and then obtains the current environmental information and current oil pump motor speed of the vehicle to be detected during actual operation, and then accurately and effectively obtains the current oil temperature corresponding to the vehicle to be detected based on the current environmental information, current oil pump motor speed and the mapping relationship. Compared with the existing method of collecting oil temperature through an oil temperature sensor, the above method of this embodiment can avoid using an oil temperature sensor to collect oil temperature, thereby reducing costs.

[0059] refer to Figure 2 , Figure 2 This is a flow chart of the second embodiment of the oil temperature determination method of the present application.

[0060] Based on the above first embodiment, in this embodiment, step S10 includes:

[0061] Step S101: determining environmental information variables and oil pump motor speed variables corresponding to internal heat, heat exchange heat, and radiation heat generated by the vehicle to be tested during the development process.

[0062] It is understandable that during the operation of a hybrid electric vehicle or a pure electric vehicle, the heat related to the oil temperature mainly includes internal heat, heat exchange heat, and radiation heat. Therefore, in order to determine the oil temperature, this embodiment can determine the environmental information variables related to the internal heat, heat exchange heat, and radiation heat and the oil pump motor speed variables, that is, under different environmental information and oil pump motor speeds, the internal heat, heat exchange heat, and radiation heat generated are also different.

[0063] Furthermore, in order to effectively determine the environmental information variables and the oil pump motor speed variables, in the present embodiment, the step S101 includes: determining the internal heat generated by the vehicle to be tested during the development process, the internal heat including: the heat generated by the motor, the heat dissipated by the power devices of the motor controller, and the heat generated by the gear refueling; determining the heat exchange heat generated by the vehicle to be tested during the development process; determining the radiant heat generated by the vehicle to be tested during the development process, the radiant heat including: the radiant heat of the electric drive, the heat convection exchange heat, and the radiant heat of the engine; determining the environmental information variables and the oil pump motor speed variables corresponding to the heat generated by the motor, the heat dissipated by the power devices of the motor controller, the heat generated by the gear refueling, the heat exchange heat, the radiant heat of the electric drive, the heat convection exchange heat, and the radiant heat of the engine.

[0064] It should be understood that the internal heat in this embodiment may include the heat generated by the motor, the heat dissipated by the power devices of the motor controller, and the heat of gear oiling. The heat exchange heat refers to the heat exchanged between the radiator of the cooling and lubrication system and the entire vehicle. The radiant heat may include the radiant heat of the electric drive through the outer casing, the heat convection exchange heat, and the radiant heat of the engine.

[0065] Further, in the present embodiment, the step of determining the environmental information variables and the oil pump motor speed variables corresponding to the motor heat generation, the heat dissipation of the power device of the motor controller, the heat of the gear refueling, the heat of the heat exchange, the radiant heat of the electric drive, the heat of the thermal convection exchange, and the radiant heat of the engine specifically includes: determining the motor power variable, the drive mode variable, and the vehicle speed variable corresponding to the motor heat generation, the heat dissipation of the power device of the motor controller, and the heat of the gear refueling; determining the water inlet temperature variable, the water outlet temperature variable, the cooling water flow variable, and the oil pump motor speed variable corresponding to the heat exchange heat; determining the environmental temperature variable, the vehicle speed variable, and the engine temperature variable corresponding to the radiant heat of the electric drive, the thermal convection exchange heat, and the radiant heat of the engine.

[0066] It is understandable that the environmental information variables in this embodiment include: motor power variables, drive mode variables, vehicle speed variables, water inlet temperature variables, water outlet temperature variables, cooling water flow variables, ambient temperature variables and engine temperature variables.

[0067] Furthermore, in order to determine the motor power variable, the drive mode variable and the vehicle speed variable, in the present embodiment, the step of determining the motor power variable, the drive mode variable and the vehicle speed variable corresponding to the motor heat generation, the heat dissipation of the power device of the motor controller and the heat generated by the gear refueling, specifically includes: determining the motor power variable corresponding to the motor heat generation and the heat dissipation of the power device of the motor controller; determining the drive mode variable and the vehicle speed variable corresponding to the heat generated by the gear refueling.

[0068] It should be understood that the heat generated by the motor = K1×motor power, the heat generated by the power device of the motor controller = K2×motor power, K1 and K2 are preset coefficients. It can be seen that the heat generated by the motor and the heat generated by the power device of the motor controller are related to the motor power.

[0069] Understandably, T 1 is the torque of the pinion, n 1 is the speed of the pinion, β is the helix angle, and M is the mechanical advantage of meshing. v is the kinematic viscosity of the lubricating oil, V is the tangential pitch velocity, and K is the load intensity, which can be the transmission force or contact area, and is mainly related to the drive mode (the number of gears involved in the transmission) and the vehicle speed.

[0070] In the specific implementation, the heat exchange heat refers to the heat exchange heat between the electric drive cooling and lubrication system and the whole vehicle through the radiator, (oil pump motor speed × displacement × volumetric efficiency × specific heat capacity of oil × (outlet oil temperature - inlet oil temperature) = (cooling water outlet temperature - water inlet temperature) × cooling water specific heat capacity × cooling water flow rate). Therefore, the heat exchange heat is related to the cooling water inlet, outlet temperature, cooling water flow rate, radiator efficiency, oil side flow rate, that is, the oil pump motor speed.

[0071] Further, in order to determine the ambient temperature variable, the vehicle speed variable and the engine temperature variable, in the present embodiment, the step of determining the ambient temperature variable, the vehicle speed variable and the engine temperature variable corresponding to the radiant heat of the electric drive, the heat convection exchange heat and the engine radiant heat specifically includes: determining the ambient temperature variable corresponding to the radiant heat of the electric drive; determining the ambient temperature variable and the vehicle speed variable corresponding to the heat convection exchange heat; determining the engine temperature variable corresponding to the engine radiant heat.

[0072] It should be understood that the radiant heat of the electric drive refers to the radiant heat dissipated by the electric drive through the housing, Q1 = εσA (T 4 -T0 4), Q1 is the radiation heat dissipation per unit time, ε is the emissivity, σ is the Stefan-Boltzmann constant, which is approximately 5.67×10^-8W / (m^2·K^4)A is the surface area of ​​the radiator, T is the temperature of the radiator, and T0 is the ambient temperature. Therefore, the radiation heat of the electric drive is related to the ambient temperature.

[0073] It can be understood that for heat convection exchange, Q2=hAΔT, Q2 is the heat convection exchange heat, h is the heat convection exchange coefficient, A is the heat transfer area, and ΔT is the temperature difference. Therefore, the heat convection exchange heat is related to the ambient temperature and the vehicle speed.

[0074] In a specific implementation, the calculation method of the engine radiation heat is the same as the electric drive radiation heat, which is related to the engine temperature and the electric drive housing temperature.

[0075] Step S102: collecting the oil temperature variable of the vehicle to be tested during the development process through an oil temperature sensor.

[0076] It is understandable that the oil temperature variable of the vehicle to be tested during the development process can be collected through the oil temperature sensor.

[0077] Step S103: determining a mapping relationship between environmental information, oil pump motor speed and oil temperature according to the environmental information variable, the oil pump motor speed variable and the oil temperature variable.

[0078] It should be understood that the motor power, drive mode, vehicle speed, water inlet temperature, water outlet temperature, cooling water flow, oil pump motor speed, ambient temperature, and engine temperature, among which, except for the oil pump motor speed which is actively controlled, the remaining variables are all passive inputs. During the development process, an oil temperature sensor is set, and the above-mentioned relevant environmental information variables are collected at the same time, and the mapping relationship between oil temperature and oil pump motor speed is calibrated to establish.

[0079] In the specific implementation, based on this mapping relationship, during the mass production stage of the vehicle model, the oil temperature sensor can be eliminated, the current external environmental variables can be retrieved through the relationship library, and the current actual oil temperature can be estimated based on the oil pump motor speed and provided to the control system for motor power limitation or other purposes.

[0080] This embodiment determines the environmental information variables and oil pump motor speed variables corresponding to the internal heat, heat exchange heat and radiation heat generated by the vehicle to be tested during the development process, and then collects the oil temperature variables of the vehicle to be tested during the development process through the oil temperature sensor, and then determines the mapping relationship between environmental information, oil pump motor speed and oil temperature based on the environmental information variables, oil pump motor speed variables and oil temperature variables. This embodiment determines the environmental information variables and oil pump motor speed variables corresponding to the internal heat, heat exchange heat and radiation heat generated by the vehicle to be tested during the development process, and can accurately obtain the relevant variables that affect the oil temperature, and then determines the mapping relationship between environmental information, oil pump motor speed and oil temperature based on the environmental information variables, oil pump motor speed variables and oil temperature variables, thereby accurately obtaining the mapping relationship between environmental information, oil pump motor speed and oil temperature.

[0081] Reference Figure 3 , Figure 3 This is a structural block diagram of the first embodiment of the oil temperature determination device of the present application.

[0082] like Figure 3 As shown, the oil temperature determination device proposed in the embodiment of the present application includes:

[0083] A mapping relationship determination module 10 is used to determine a mapping relationship between environmental information, oil pump motor speed and oil temperature of a vehicle to be tested during development;

[0084] An information determination module 20 is used to obtain the current environmental information and the current oil pump motor speed of the vehicle to be detected at the current moment;

[0085] The oil temperature determination module 30 is used to determine the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, the current oil pump motor speed and the mapping relationship.

[0086] This embodiment determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process, then obtains the current environmental information and current oil pump motor speed of the vehicle to be detected at the current moment, and then determines the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, current oil pump motor speed and the mapping relationship. This embodiment first determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process, and can effectively determine the mapping relationship between the environmental information, oil pump motor speed and oil temperature during the development process of the vehicle to be detected, and then obtains the current environmental information and current oil pump motor speed of the vehicle to be detected during actual operation, and then accurately and effectively obtains the current oil temperature corresponding to the vehicle to be detected based on the current environmental information, current oil pump motor speed and the mapping relationship. Compared with the existing method of collecting oil temperature through an oil temperature sensor, the above method of this embodiment can avoid using an oil temperature sensor to collect oil temperature, thereby reducing costs.

[0087] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present application. In practical applications, technicians in this field can select part or all of it according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0088] In addition, for technical details not fully described in this embodiment, please refer to the oil temperature determination method provided in any embodiment of the present application, and will not be repeated here.

[0089] Based on the above-mentioned first embodiment of the oil temperature determination device of the present application, a second embodiment of the oil temperature determination device of the present application is proposed.

[0090] In this embodiment, the mapping relationship determination module 10 is also used to determine the environmental information variables and oil pump motor speed variables corresponding to the internal heat, heat exchange heat and radiation heat generated by the vehicle to be tested during the development process; collect the oil temperature variables of the vehicle to be tested during the development process through the oil temperature sensor; determine the mapping relationship between environmental information, oil pump motor speed and oil temperature according to the environmental information variables, the oil pump motor speed variables and the oil temperature variables.

[0091] Furthermore, the mapping relationship determination module 10 is also used to determine the internal heat generated by the vehicle to be tested during the development process, and the internal heat includes: the heat generated by the motor, the heat dissipated by the power devices of the motor controller, and the heat of gear refueling; determine the heat exchange heat generated by the vehicle to be tested during the development process; determine the radiation heat generated by the vehicle to be tested during the development process, and the radiation heat includes: the radiation heat of the electric drive, the heat convection exchange heat, and the radiation heat of the engine; determine the environmental information variables and the oil pump motor speed variables corresponding to the heat generated by the motor, the heat dissipated by the power devices of the motor controller, the heat of gear refueling, the heat exchange heat, the radiation heat of the electric drive, the heat convection exchange heat, and the radiation heat of the engine.

[0092] Furthermore, the environmental information variables include: motor power variables, drive mode variables, vehicle speed variables, water inlet temperature variables, water outlet temperature variables, cooling water flow variables, ambient temperature variables and engine temperature variables; the mapping relationship determination module 10 is also used to determine the motor power variable, the drive mode variable and the vehicle speed variable corresponding to the heat generated by the motor, the heat dissipated by the power device of the motor controller and the heat of the gear refueling; determine the water inlet temperature variable, the water outlet temperature variable, the cooling water flow variable and the oil pump motor speed variable corresponding to the heat exchange heat; determine the ambient temperature variable, the vehicle speed variable and the engine temperature variable corresponding to the radiant heat of the electric drive, the heat convection exchange heat and the radiant heat of the engine.

[0093] Furthermore, the mapping relationship determination module 10 is also used to determine the motor power variable corresponding to the heat generated by the motor and the heat dissipation of the power device of the motor controller; and determine the driving mode variable and vehicle speed variable corresponding to the heat generated by the gear refueling.

[0094] Furthermore, the mapping relationship determination module 10 is also used to determine the ambient temperature variable corresponding to the radiant heat of the electric drive; determine the ambient temperature variable and the vehicle speed variable corresponding to the heat exchange by thermal convection; and determine the engine temperature variable corresponding to the radiant heat of the engine.

[0095] Other embodiments or specific implementations of the oil temperature determination device of the present application can refer to the above-mentioned method embodiments and will not be repeated here.

[0096] The present application provides an oil temperature determination device, which includes: at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the oil temperature determination method in the above-mentioned embodiment one.

[0097] Reference below Figure 4 , which shows a schematic diagram of the structure of the oil temperature determination device suitable for implementing the embodiment of the present application. The oil temperature determination device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The oil temperature determination device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0098] like Figure 4 As shown, the oil temperature determination device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the oil temperature determination device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the oil temperature determination device to communicate wirelessly or wired with other devices to exchange data. Although the oil temperature determination device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0099] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0100] The oil temperature determination device provided by the present application adopts the oil temperature determination method in the above embodiment, which can solve the technical problem of how to accurately and effectively determine the vehicle oil temperature without using an oil temperature sensor and reduce costs. Compared with the prior art, the beneficial effects of the oil temperature determination device provided by the present application are the same as the beneficial effects of the oil temperature determination method provided by the above embodiment, and other technical features in the oil temperature determination device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0101] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0102] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0103] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the oil temperature determination method in the above-mentioned embodiment.

[0104] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0105] The computer-readable storage medium may be included in the oil temperature determination device; or may exist independently without being assembled into the oil temperature determination device.

[0106] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the oil temperature determination device, the oil temperature determination device: determines the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be detected during the development process; obtains the current environmental information and current oil pump motor speed of the vehicle to be detected at the current moment; and determines the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, the current oil pump motor speed and the mapping relationship.

[0107] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0108] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0109] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0110] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned oil temperature determination method, and can solve the technical problem of how to accurately and effectively determine the vehicle oil temperature without using an oil temperature sensor and reduce costs. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the oil temperature determination method provided by the above-mentioned embodiment, and will not be repeated here.

[0111] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the oil temperature determination method as described above are implemented.

[0112] The computer program product provided by the present application can solve the technical problem of how to accurately and effectively determine the vehicle oil temperature without using an oil temperature sensor and reduce costs. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the oil temperature determination method provided by the above embodiment, and will not be repeated here.

[0113] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for determining oil temperature, characterized in that: The oil temperature determination method comprises the following steps: Determine the mapping relationship between the environmental information, oil pump motor speed and oil temperature of the vehicle to be tested during the development process; Obtaining current environmental information and current oil pump motor speed of the vehicle to be detected at the current moment; The current oil temperature of the vehicle to be detected at the current moment is determined based on the current environmental information, the current oil pump motor speed and the mapping relationship.

2. The oil temperature determination method according to claim 1, characterized in that: The step of determining the mapping relationship between the environmental information of the vehicle to be tested during the development process, the oil pump motor speed, and the oil temperature specifically includes: Determine the environmental information variables and the oil pump motor speed variables corresponding to the internal heat, heat exchange heat, and radiation heat generated by the vehicle to be tested during the development process; Collecting the oil temperature variable of the vehicle to be tested during the development process through an oil temperature sensor; A mapping relationship among the environmental information, the oil pump motor speed and the oil temperature is determined according to the environmental information variable, the oil pump motor speed variable and the oil temperature variable.

3. The oil temperature determination method according to claim 2, characterized in that: The step of determining the environmental information variables and the oil pump motor speed variables corresponding to the internal heat, heat exchange heat, and radiation heat generated by the vehicle to be tested during the development process specifically includes: Determine the internal heat generated by the vehicle to be tested during the development process, the internal heat includes: the heat generated by the motor, the heat dissipated by the power device of the motor controller, and the heat generated by the gear oiling; Determining the heat exchange amount generated by the vehicle under test during the development process; Determine the radiant heat generated by the vehicle to be tested during the development process, wherein the radiant heat includes: radiant heat of electric drive, heat of heat convection exchange, and radiant heat of the engine; Determine the environmental information variables and oil pump motor speed variables corresponding to the motor heat generation, the heat dissipation of the power device of the motor controller, the heat of the gear oiling, the heat exchange heat, the radiation heat of the electric drive, the heat convection exchange heat and the engine radiation heat.

4. The oil temperature determination method according to claim 3, characterized in that: The environmental information variables include: motor power variables, driving mode variables, vehicle speed variables, water inlet temperature variables, water outlet temperature variables, cooling water flow variables, ambient temperature variables and engine temperature variables; The step of determining the environmental information variables and the oil pump motor speed variables corresponding to the motor heat generation, the power device heat dissipation of the motor controller, the gear oiling heat, the heat exchange heat, the electric drive radiation heat, the heat convection exchange heat, and the engine radiation heat specifically includes: Determine the motor power variable, the driving mode variable, and the vehicle speed variable corresponding to the motor heat generation, the heat dissipation of the power device of the motor controller, and the heat of the gear oiling; Determine the water inlet temperature variable, the water outlet temperature variable, the cooling water flow variable, and the oil pump motor speed variable corresponding to the heat exchange heat; The ambient temperature variable, the vehicle speed variable, and the engine temperature variable corresponding to the radiant heat of the electric drive, the heat of the heat convection exchange, and the radiant heat of the engine are determined.

5. The oil temperature determination method according to claim 4, characterized in that: The step of determining the motor power variable, the driving mode variable, and the vehicle speed variable corresponding to the motor heat generation, the power device heat dissipation of the motor controller, and the gear oiling heat specifically includes: Determine the motor power variable corresponding to the heat generated by the motor and the heat dissipated by the power device of the motor controller; Determine the driving mode variable and the vehicle speed variable corresponding to the heat of the gear refueling.

6. The oil temperature determination method according to claim 4, characterized in that: The step of determining the ambient temperature variable, the vehicle speed variable, and the engine temperature variable corresponding to the radiant heat of the electric drive, the heat of the heat convection exchange, and the radiant heat of the engine specifically includes: Determining the ambient temperature variable corresponding to the radiant heat of the electric drive; Determine the ambient temperature variable and the vehicle speed variable corresponding to the heat exchanged by the heat convection; The engine temperature variable corresponding to the engine radiant heat is determined.

7. An oil temperature determination device, characterized in that: The oil temperature determining device comprises: A mapping relationship determination module is used to determine the mapping relationship between the environmental information of the vehicle to be tested, the oil pump motor speed and the oil temperature during the development process; An information determination module, used to obtain the current environmental information and the current oil pump motor speed of the vehicle to be detected at the current moment; The oil temperature determination module is used to determine the current oil temperature of the vehicle to be detected at the current moment based on the current environmental information, the current oil pump motor speed and the mapping relationship.

8. An oil temperature determination device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the oil temperature determination method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the oil temperature determination method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the oil temperature determination method according to any one of claims 1 to 6 are implemented.

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