A vehicle and its thermal management control method, device and storage medium

Abstract

The present application provides a vehicle and its thermal management control method, device and storage medium, wherein the vehicle includes an engine and a thermal management system, the thermal management system includes a water pump, the engine and the water pump are connected to form a first cooling cycle, and the thermal management control method includes: when the current temperature of the engine is less than or equal to a preset temperature threshold, and the total engine power is greater than or equal to a preset power threshold, and the current vehicle speed is less than or equal to a preset vehicle speed threshold, controlling the water pump to periodically switch between a start state and a stop state. The thermal management control method provided in the present application, when the engine is in a high-power, low-speed warm-up mode, periodically controls the water pump to switch between a start state and a stop state, thereby avoiding local overheating of the engine and placing the thermal management system in a state of minimum power consumption.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular, relates to a vehicle and a thermal management control method, device, and storage medium thereof. Background Art

[0002] The thermal management control method for vehicle engines in the prior art adjusts the opening of the thermostat, the speed of the electronic water pump, and the speed of the radiator fan in order of priority from high to low, so as to meet the heat dissipation requirements under various working conditions. However, it does not take into account how to ensure that the engine does not overheat locally during the engine warm-up process while keeping the thermal management system at the lowest power consumption. Summary of the invention

[0003] In response to the above technical problems, the first purpose of the present application is to provide a thermal management control method for a vehicle. When the engine is in a high-power, low-speed warm-up mode, the water pump is periodically controlled to switch between a start state and a stop state, thereby avoiding local overheating of the engine and keeping the thermal management system in a state of minimum power consumption.

[0004] A second object of the present application is to provide a computer-readable storage medium.

[0005] A third object of the present application is to provide a thermal management control device for a vehicle.

[0006] A fourth object of the present application is to provide a vehicle.

[0007] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a thermal management control method for a vehicle, wherein the vehicle includes an engine and a thermal management system, the thermal management system includes a water pump, the engine and the water pump are connected to form a first cooling cycle, and the control method includes:

[0008] When the current engine temperature is less than or equal to a preset temperature threshold, the total engine power is greater than or equal to a preset power threshold, and the current vehicle speed is less than or equal to a preset vehicle speed threshold, the water pump is controlled to periodically switch between a start state and a stop state.

[0009] When the current engine temperature is less than or equal to the preset temperature threshold, the total engine power is greater than or equal to the preset power threshold, and the current vehicle speed is less than or equal to the preset speed threshold, the engine can be considered to be in a high-power, low-speed warm-up state. By periodically controlling the water pump to switch between the start state and the stop state, local overheating of the engine is avoided and the thermal management system is kept in the lowest power consumption state.

[0010] To achieve the above objectives, the second aspect of the present application provides a computer-readable storage medium, which stores a computer program. The computer program is suitable for being executed by a processor to implement the thermal management control method according to the first aspect of the present application.

[0011] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes a thermal management control device for a vehicle, including a processor and a memory, which are interconnected; the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions to execute the thermal management control method described in the first aspect embodiment above.

[0012] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes a vehicle, including an engine and a thermal management system, wherein the thermal management system includes a water pump, an air-cooled radiator, a thermostat and the thermal management control device according to the above-mentioned third aspect embodiment.

[0013] The theoretical aspects and advantages of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a vehicle provided in an embodiment of the present application.

[0015] Figure 2 It is a flow chart of the thermal management control method provided in the embodiment of the present application.

[0016] Reference numerals:

[0017] 100. Vehicle; 110. Engine; 120. Thermal management system; 121. Water pump; 122. Air-cooled radiator; 123. Thermostat; 124. Thermal management control device; 124a. Processor; 124b. Memory. DETAILED DESCRIPTION

[0018] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0019] Please refer to the following Figure 1-2 The vehicle 100 and its thermal management control method, thermal management control device and computer-readable storage medium according to the embodiments of the present application are described.

[0020] like Figure 1As shown, the vehicle 100 includes an engine 110 and a thermal management system 120, and the thermal management system 120 includes a water pump 121, an air-cooled radiator 122, a thermostat 123, and a thermal management control device 124. The thermal management control device 124 includes a processor 124a and a memory 124b, the processor 124a and the memory 124b are interconnected, and the memory 124b is used to store a computer program, and the computer program includes program instructions. The processor 124a is configured to call the program instructions and execute the thermal management control method provided in the embodiment itself. In addition, the computer-readable storage medium provided in the embodiment of the present application stores a computer program, and the computer program is executed by the processor to implement the thermal management control method provided in the embodiment of the present application.

[0021] like Figure 1 As shown, the engine 110 and the water pump 121 are connected to form a first cooling cycle, that is, the coolant is pumped out by the water pump 121 through the engine 110 and cools the engine 110; the air-cooled radiator 122 is connected to the engine 110 and the water pump 121 through the thermostat 123 to form a second cooling cycle, that is, when the thermostat 123 is turned on, the coolant is pumped out by the water pump 121 through the engine 110 and cools the engine 110, and then enters the air-cooled radiator 122 through the thermostat 123 for cooling. It should be noted that the first cooling cycle is a small cycle for cooling the engine 110, and the second cooling cycle is a large cycle for cooling the engine 110.

[0022] The thermal management control method provided in an embodiment of the present application includes step S1: when the current engine temperature is less than or equal to a preset temperature threshold, the total engine power is greater than or equal to a preset power threshold, and the current vehicle speed is less than or equal to a preset vehicle speed threshold, controlling the water pump to periodically switch between a start state and a stop state.

[0023] When the current temperature of the engine is less than or equal to the preset temperature threshold, the engine 110 can be considered to be in a warm-up state, and when the total engine power is greater than or equal to the preset power threshold and the current vehicle speed is less than or equal to the preset vehicle speed threshold, the engine 110 is in a high-power, low-speed state. At this time, the heat dissipation demand of the engine 110 is not high, but there is a risk of local overheating. Therefore, by controlling the water pump 121 to periodically switch between the start state and the stop state, the engine 110 is prevented from being locally overheated, and the engine 110 warm-up time is too long due to excessive heat dissipation and the power consumption of the thermal management system 120 is increased, that is, the minimum power consumption of the thermal management system 120 is guaranteed. It should be noted that the temperature-related parameter of the engine 110 in this application is the temperature of the coolant when it flows out of the engine 110. In some embodiments, the preset temperature threshold may be 60°C~80°C, the preset power threshold may be 5kW~8kW, and the preset vehicle speed threshold may be 5km / h~10km / h; in some cases, the preset temperature threshold may be 80°C, the preset power threshold may be 5kW, and the preset vehicle speed threshold may be 5km / h.

[0024] In some embodiments, step S1 includes: when the water pump is in the starting state, the speed of the water pump is the safe speed of the water pump. It should be noted that the safe speed of the water pump is the speed under the safe flow rate, and the so-called safe flow rate refers to the minimum flow value that satisfies the cooling of the cylinder block and cylinder head of the engine under a certain load, that is, the flow rate that does not cause local overheating or boiling. In some embodiments, the safe speed MAP of the water pump is queried according to the current engine speed and the current engine torque to determine the safe speed of the water pump; wherein, the safe speed MAP of the water pump is calibrated through simulation and experiment according to the specific situation of the engine 110 during the research and development design stage to prevent the engine 110 from local overheating, and is preset in the thermal management control device 124.

[0025] In some embodiments, step S1 includes: after the water pump is in the start state for a start time, the water pump is controlled to switch to the stop state; after the water pump is in the stop state for a stop time, the water pump is controlled to switch to the start state. In some embodiments, the start time and the stop time are both preset fixed values. Since the time when the engine 110 is in the warm-up state of high power and low vehicle speed is not very long, the start time and the stop time are calibrated by simulation and experiment in the research and development design stage according to the specific situation of the engine 110, and preset in the thermal management control device 124, which can meet the basic requirements and make the control program simple. In other embodiments, the start time is positively correlated with the current vehicle speed and the stop time is negatively correlated with the current vehicle speed. Obviously, the higher the current vehicle speed, the higher the heat dissipation demand of the engine 110, thereby increasing the start time and reducing the stop time, which can more accurately ensure that the thermal management system 120 is in the lowest power consumption state.

[0026] In some embodiments, the thermal management control method provided in the embodiments of the present application further includes step S2: when the current temperature of the engine is less than or equal to the preset temperature threshold, the speed of the air-cooled radiator is controlled to be 0, and the opening of the thermostat is controlled to be 0. It should be noted that the speed of the air-cooled radiator 122 refers to the speed of the fan in the air-cooled radiator 122.

[0027] When the current temperature of the engine is less than or equal to the preset temperature threshold, the engine 110 can be considered to be in a warm-up state, that is, the heat dissipation demand of the engine 110 is relatively small, and the engine 110 can be warmed up by its own heat. Therefore, the speed of the air-cooled radiator 122 is controlled to 0, and the opening of the thermostat 123 is controlled to 0, so that the engine 110 does not participate in the cooling of the second cooling cycle, thereby ensuring that the thermal management system 120 is in the lowest power consumption state.

[0028] In some embodiments, the thermal management control method provided in the embodiments of the present application further includes step S3: when the current temperature of the engine is less than or equal to a preset temperature threshold and the total power of the engine is less than a preset power threshold, controlling the water pump to stop.

[0029] When the current engine temperature is less than or equal to the preset temperature threshold and the total engine power is less than the preset power threshold, the engine 110 can be considered to be in a low-power warm-up state. At this time, the heat generated by the engine 110 is relatively small and can be fully used for the warm-up needs of the engine 110, and there is no risk of local overheating, that is, no cooling is required. Therefore, by controlling the water pump 121 to stop, the thermal management system 120 is ensured to be in the lowest power consumption state.

[0030] In some embodiments, the thermal management control method provided in the embodiments of the present application also includes step S4: when the current engine temperature is less than or equal to the preset temperature threshold, and the total engine power is greater than or equal to the preset power threshold, and the current vehicle speed is greater than the preset vehicle speed threshold, the water pump speed is controlled to be a water pump safety speed.

[0031] When the current engine temperature is less than or equal to the preset temperature threshold, the total engine power is greater than or equal to the preset power threshold, and the current vehicle speed is greater than the preset vehicle speed threshold, the engine 110 can be considered to be in a high-power, high-speed warm-up state. Compared with the high-power, low-speed state, the engine 110 has a higher risk of local overheating. Therefore, the speed of the water pump 121 is controlled to be maintained at the safe speed of the water pump, which ensures a safe flow rate without local overheating of the engine 110 and ensures that the thermal management system 120 is in the lowest power consumption state.

[0032] In other embodiments, step S4 may be replaced by step S4a: when the current temperature of the engine is less than or equal to the preset temperature threshold, the total engine power is greater than or equal to the preset power threshold, and the current vehicle speed is greater than the preset vehicle speed threshold, the speed of the water pump is controlled to be greater than or equal to the safe speed of the water pump and is positively correlated with the current vehicle speed. The speed of the water pump is controlled to increase with the increase of the current vehicle speed, which can further reduce the risk of local overheating of the engine 110.

[0033] In some embodiments, the thermal management control method provided in the embodiments of the present application further includes the following steps S5 to S8.

[0034] S5. When the current engine temperature is greater than the preset temperature threshold and the opening of the thermostat is greater than or equal to the preset opening threshold, the engine minimum fuel consumption MAP is queried according to the current engine speed, the current engine torque, and the current ambient temperature to determine the total target heat dissipation; in some embodiments, the preset opening threshold may be 95% to 100%, specifically, the preset opening threshold may be 100%, that is, the thermostat 123 is fully open.

[0035] When the temperature of the engine 110 is greater than or equal to the preset temperature threshold, it can be considered that the engine 110 has completed warming up. At this time, the thermal management system 120 needs to continuously control the temperature of the engine 110, and when the opening of the thermostat 123 is greater than or equal to the preset opening threshold, it can be considered that the engine 110 has entered a working state with a high heat dissipation demand. At this time, the water pump 121 and the air-cooled radiator 122 both need to participate in the cooling of the engine 110 and make the engine 110 reach the lowest fuel consumption, that is, the highest efficiency working state. Specifically, the current engine speed, the current engine torque and the current ambient temperature are used as input parameters to query the engine minimum fuel consumption MAP, and finally output the total target heat dissipation that can make the engine 110 reach the lowest fuel consumption, that is, the highest efficiency working state. Among them, the engine minimum fuel consumption MAP is calibrated by simulation and experiment according to the specific situation of the vehicle 100 in the research and development design stage to make the engine 110 have the lowest fuel consumption, and is preset in the thermal management control device 124. The current ambient temperature refers to the air temperature outside the vehicle, that is, the intake air temperature of the engine 110 and the intake air temperature of the air-cooled radiator 122 .

[0036] S6. According to the total target heat dissipation, the air inlet speed of the air-cooled radiator, and the current ambient temperature, query the minimum power consumption MAP of the thermal management system to determine the target speed of the water pump and the target speed of the air-cooled radiator.

[0037] When the opening of the thermostat 123 is greater than or equal to the preset opening threshold, the engine 110 is cooled through the second cooling cycle, wherein there are countless combinations of the rotation speeds of the water pump 121 and the air-cooled radiator 122 that can enable the engine 110 to achieve the lowest fuel consumption, i.e., the highest efficiency, and the embodiment of the present application uses the total target heat dissipation, the air inlet wind speed of the air-cooled radiator 122 and the current ambient temperature as input parameters, queries the minimum power consumption MAP of the thermal management system, and outputs the combination of the target speed of the water pump and the target speed of the air-cooled radiator, so that the thermal management system 120 works under the state of minimum power consumption. Among them, the minimum power consumption MAP of the thermal management system is calibrated by simulation and experiment according to the specific situation of the thermal management system 120 during the research and development design stage to minimize the power consumption of the thermal management system 120, and is preset in the thermal management control device 124. In some embodiments, the air inlet wind speed of the air-cooled radiator 122 is determined according to the current vehicle speed and the ambient wind speed.

[0038] S7, controlling the rotation speed of the water pump to be the water pump target rotation speed, and controlling the rotation speed of the air-cooled radiator to be the air-cooled radiator target rotation speed.

[0039] The total target heat dissipation required for the engine to achieve the lowest fuel consumption or the highest efficiency under the current working condition is determined through the preset engine minimum fuel consumption MAP, and then the combination of the water pump 121 speed and the air-cooled radiator 122 speed with the lowest power consumption of the thermal management system 120 under the current environment is determined through the preset thermal management system minimum power consumption MAP, that is, the water pump target speed and the air-cooled radiator target speed, and the water pump 121 and the air-cooled radiator 122 are controlled to operate at the water pump target speed and the air-cooled radiator target speed respectively, thereby achieving the joint optimization of the thermal management system power consumption and the engine fuel consumption.

[0040] In some embodiments, step S5 includes the following steps S501 to S503.

[0041] S501, querying the engine minimum fuel consumption MAP according to the current engine speed, the current engine torque, and the current ambient temperature, and determining the engine target temperature;

[0042] S502, determining the engine heat according to the current engine speed and the current engine torque;

[0043] S503: Determine a total target heat dissipation amount according to the current engine temperature, the target engine temperature and the engine heat output.

[0044] The current engine speed, the current engine torque and the current ambient temperature are used as input parameters to query the engine minimum fuel consumption MAP, and output the engine target temperature that can make the engine 110 reach the lowest fuel consumption, that is, the highest efficiency working state. In some embodiments, according to the difference between the current engine temperature and the target engine temperature △ T, it can be calculated that the heat required for the engine to increase from the current temperature to the target temperature is C·M·△ T , where C is the specific heat capacity of the coolant and M is the mass of the coolant. The mass of the coolant is related to the flow rate. Therefore, the engine heat generation is related to C·M·△ T By subtracting the values, the total target heat dissipation for engine cooling can be obtained.

[0045] In some embodiments, the thermal management control method provided in the embodiments of the present application further includes the following steps S8 to S11.

[0046] S8, when the current temperature of the engine is greater than or equal to the preset temperature threshold, and the opening of the thermostat is less than the preset opening threshold, the speed of the water pump is controlled to be the safe speed of the water pump, and the speed of the air-cooled radiator is controlled to be 0;

[0047] S9, querying the engine minimum fuel consumption MAP according to the current engine speed, the current engine torque, and the current ambient temperature, and determining the engine target temperature;

[0048] S10, determining a target thermostat opening according to a current engine temperature and a target engine temperature;

[0049] S11. Control the opening of the thermostat to be the target opening of the thermostat.

[0050] When the temperature of the engine 110 is greater than or equal to the preset temperature threshold and the opening of the thermostat 123 is less than the preset opening threshold, it can be considered that the engine 110 has completed warming up, but the engine 110 has not entered a working state with a high heat dissipation requirement. At this time, the opening of the thermostat 123 can be controlled so that the engine 110 reaches the target temperature and operates under the state of minimum fuel consumption and maximum efficiency. At the same time, since the water pump 121 runs at the lowest speed and the air-cooled radiator stops running, the thermal management system 120 is also in the lowest power consumption state.

[0051] like Figure 2 As shown, in some embodiments, the thermal management system control method provided in the embodiments of the present application includes the following steps S101~S117.

[0052] S101. Determine whether the following conditions are met: the current temperature of the engine is less than or equal to a preset temperature threshold. If so, it is considered that the engine 110 is in the warm-up phase, and step S102 is executed. If not, it is considered that the engine has ended the warm-up phase and entered the driving phase, and step S108 is executed.

[0053] S102: When the engine 110 is in the warm-up stage, the rotation speed of the air-cooled radiator is controlled to be 0, and the opening of the thermostat is controlled to be 0.

[0054] S103, determine whether the following conditions are met: the total engine power is greater than or equal to a preset power threshold; if so, it is considered that the engine 110 is in a high-power warm-up mode, and step S104 is executed; if not, it is considered that the engine 110 is in a low-power warm-up mode, and step S107 is executed.

[0055] S104, determine whether the following conditions are met: the current vehicle speed is less than or equal to a preset vehicle speed threshold; if so, it is considered that the engine 110 is in a high-power, low-speed warm-up mode, and step S105 is executed; if not, it is considered that the engine 110 is in a high-power, high-speed warm-up mode, and step S106 is executed.

[0056] S105: When the engine 110 is in the high-power, low-speed warm-up mode, the water pump is controlled to periodically switch between the start state and the stop state, and when the water pump is in the start state, the speed of the water pump is the safe speed of the water pump. In some embodiments, after the water pump is in the start state for a start time, the water pump is controlled to switch to the stop state; after the water pump is in the stop state for a stop time, the water pump is controlled to switch to the start state; the start time and the stop time are preset fixed values.

[0057] S106: When the engine 110 is in the high-power and high-speed warm-up mode, the water pump is controlled to be in a start-up state, and the rotation speed of the water pump is a safe rotation speed of the water pump.

[0058] S107: When the engine 110 is in the low-power warm-up mode, the water pump is controlled to be in a stopped state.

[0059] S108, connected to S101, when the engine 110 is in the driving stage, determine whether the following conditions are met: the opening of the thermostat is greater than or equal to a preset opening threshold. If so, it is considered that the engine 110 has a high heat dissipation demand, and step S109 is executed. If not, it is considered that the heat dissipation demand of the engine 110 is relatively low, and step S114 is executed.

[0060] S109: When the engine 110 has a high heat dissipation demand, the engine minimum fuel consumption MAP is queried according to the current engine speed, the current engine torque and the ambient temperature to determine the engine target temperature. It can be considered that when the operating temperature of the engine 110 in the current state is the engine target temperature, the engine 110 is in the state of minimum fuel consumption.

[0061] S110: Determine the engine heat according to the current engine speed and the current engine torque.

[0062] S111 determines the total target heat dissipation based on the current engine temperature, the target engine temperature and the engine heat output.

[0063] S112, according to the input total target heat dissipation, the air inlet speed of the air-cooled radiator and the ambient temperature, query the minimum power consumption MAP of the thermal management system, and determine the target speed of the water pump and the target speed of the air-cooled radiator. It can be considered that under the current heat dissipation demand and the current environment, when the speed of the water pump 121 is the target speed of the water pump and the speed of the air-cooled radiator 122 is the target speed of the air-cooled radiator, the thermal management system 120 is in the lowest power consumption state.

[0064] S113, controlling the rotation speed of the water pump to be a target rotation speed of the water pump, and controlling the rotation speed of the air-cooled radiator to be a target rotation speed of the air-cooled radiator.

[0065] S114, connected to S108, when the heat dissipation demand of the engine 110 is relatively low, the rotation speed of the water pump is controlled to be a safe rotation speed of the water pump, and the rotation speed of the air-cooled radiator is controlled to be 0.

[0066] S115 : According to the current engine speed, the current engine torque and the ambient temperature, query the engine minimum fuel consumption MAP and determine the engine target temperature.

[0067] S116: Determine a target thermostat opening according to the current engine temperature and the engine target temperature.

[0068] S117. Control the opening of the thermostat to be the target opening of the thermostat.

[0069] In the thermal management control method provided in the embodiment of the present application, when the current temperature of the engine is less than or equal to the preset temperature threshold, the engine 110 can be considered to be in a warm-up state, and when the total engine power is greater than or equal to the preset power threshold and the current vehicle speed is less than or equal to the preset vehicle speed threshold, that is, the engine 110 is in a high-power, low-speed state. At this time, the heat dissipation demand of the engine 110 is not high, but there is a risk of local overheating. Therefore, by controlling the water pump 121 to periodically switch between the start state and the stop state, local overheating of the engine 110 is avoided, and the engine 110 warm-up time caused by excessive heat dissipation is avoided. The increased power consumption of the thermal management system 120 is avoided, that is, the minimum power consumption of the thermal management system 120 is guaranteed.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0073] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable storage medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable storage media include the following: an electrical connection portion with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0074] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0075] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0076] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0077] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A thermal management control method for a vehicle, the vehicle comprising an engine and a thermal management system, the thermal management system comprising a water pump, the engine and the water pump are connected to form a first cooling cycle, the thermal management system further comprising an air-cooled radiator and a thermostat, the air-cooled radiator is connected to the engine and the water pump through the thermostat to form a second cooling cycle, characterized in that: The thermal management control method comprises: When the current temperature of the engine is less than or equal to the preset temperature threshold, the total engine power is greater than or equal to the preset power threshold, and the current vehicle speed is less than or equal to the preset vehicle speed threshold, the water pump is controlled to periodically switch between the start state and the stop state when the engine is in a warm-up state of high power and low vehicle speed, wherein when the water pump is in the start state, the speed of the water pump is the safe speed of the water pump; When the current temperature of the engine is less than or equal to the preset temperature threshold, the total power of the engine is greater than or equal to the preset power threshold, and the current vehicle speed is greater than the preset vehicle speed threshold, the speed of the water pump is controlled to be maintained at the water pump safety speed when the engine is in a warm-up state with high power and high vehicle speed, or the speed of the water pump is controlled to be greater than the water pump safety speed and to be positively correlated with the current vehicle speed; When the current temperature of the engine is greater than the preset temperature threshold and the opening of the thermostat is greater than or equal to the preset opening threshold, querying the engine minimum fuel consumption MAP according to the current engine speed, the current engine torque and the current ambient temperature to determine the total target heat dissipation; According to the total target heat dissipation, the air inlet speed of the air-cooled radiator, and the current ambient temperature, query the minimum power consumption MAP of the thermal management system to determine the target speed of the water pump and the target speed of the air-cooled radiator; The rotation speed of the water pump is controlled to be the water pump target rotation speed, and the rotation speed of the air-cooled radiator is controlled to be the air-cooled radiator target rotation speed.

2. The thermal management control method according to claim 1, characterized in that: The thermal management control method further includes: when the current temperature of the engine is less than or equal to the preset temperature threshold, controlling the rotation speed of the air-cooled radiator to be 0, and controlling the opening of the thermostat to be 0.

3. The thermal management control method according to claim 1, characterized in that: When the current temperature of the engine is less than or equal to the preset temperature threshold, and the total power of the engine is less than the preset power threshold, the water pump is controlled to stop.

4. The thermal management control method according to claim 1, characterized in that: When the current temperature of the engine is greater than or equal to a preset temperature threshold, and the opening of the thermostat is greater than or equal to a preset opening threshold, querying the engine minimum fuel consumption MAP according to the current engine speed, the current engine torque, and the current ambient temperature to determine the total target heat dissipation of the engine, including: According to the current engine speed, the current engine torque, and the current ambient temperature, the engine minimum fuel consumption MAP is searched to determine the engine target temperature; Determining the engine heat according to the current engine speed and the current engine torque; The total target heat dissipation is determined according to the current engine temperature, the target engine temperature and the engine heat output.

5. The thermal management control method according to claim 1, characterized in that: The thermal management control method further comprises: When the current temperature of the engine is greater than or equal to the preset temperature threshold, and the opening of the thermostat is less than the preset opening threshold, the speed of the water pump is controlled to be a safe speed of the water pump, and the speed of the air-cooled radiator is controlled to be 0; Query the engine minimum fuel consumption MAP according to the current engine speed, current engine torque and current ambient temperature, and determine the engine target temperature; determining a target thermostat opening according to the current engine temperature and the target engine temperature; The opening of the thermostat is controlled to be the target opening of the thermostat.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is suitable for being executed by a processor to implement the thermal management control method according to any one of claims 1 to 5.

7. A thermal management control device for a vehicle, characterized in that: comprising a processor and a memory, wherein the processor and the memory are connected to each other; The memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the thermal management control method according to any one of claims 1 to 5.

8. A vehicle, characterized in that: The vehicle comprises an engine and a thermal management system, the thermal management system comprising a water pump, an air-cooled radiator, a thermostat and a thermal management control device according to claim 7; The engine and the water pump are connected to form a first cooling cycle, and the air-cooled radiator is connected to the engine and the water pump through the thermostat to form a second cooling cycle.

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