Vehicle and thermal management control method, device, storage medium, and computer program

Abstract

A vehicle (100) and a thermal management control method, device (124), and storage medium, the vehicle (100) including an engine (110) and a thermal management system (120), the thermal management system (120) including a water pump (121), the engine (110) and the water pump (121) being connected to form a first cooling cycle. The thermal management control method includes controlling the water pump (121) to periodically switch between a started state and a stopped state when a current temperature of the engine (110) is equal to or less than a predetermined temperature threshold, a total power output of the engine (110) is equal to or greater than a predetermined power threshold, and a current vehicle speed is equal to or less than a predetermined vehicle speed threshold.

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This disclosure claims priority to a Chinese patent application filed on April 27, 2021, bearing application number 202110458538.7 and entitled "Vehicle and Its Thermal Management Control Method, Apparatus and Storage Medium," the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of vehicles, and in particular to a vehicle and its thermal management control method, device, and storage medium. [Background technology]

[0003] The thermal management control method for a vehicle engine in the related art satisfies the heat dissipation needs in each operating condition by adjusting the opening of the thermostat, the rotation speed of the electronic water pump, and the rotation speed of the radiator fan in order of priority, but does not consider the problem of how to ensure that the engine does not overheat locally during the engine warm-up process and how to make the thermal management system consume the minimum power. Summary of the Invention

[0004] In view of the above technical problems, a first object of the present invention is to provide a vehicle thermal management control method that controls a water pump to periodically switch between a started state and a stopped state when the engine is in a warm-up mode with high power and low vehicle speed, thereby avoiding localized overheating of the engine and placing the thermal management system in a state of minimum power consumption.

[0005] A second object of the present disclosure is to provide a computer-readable storage medium.

[0006] A third object of the present disclosure is to provide a vehicle thermal management control system.

[0007] A fourth object of the present disclosure is to provide a vehicle.

[0008] In order to achieve the above object, an embodiment of a first aspect of the present disclosure provides a thermal management control method for a vehicle, wherein the vehicle includes an engine and a thermal management system, the thermal management system including a water pump, and the engine and the water pump are connected to form a first cooling cycle, the thermal management control method comprising: controlling the water pump to periodically switch between a started state and a stopped state when a current temperature of the engine is below a predetermined temperature threshold, a total power output of the engine is above a predetermined power threshold, and a current vehicle speed is below a predetermined vehicle speed threshold.

[0009] If the current engine temperature is below a predetermined temperature threshold, the total engine power is above a predetermined power threshold, and the current vehicle speed is below a predetermined vehicle speed threshold, the engine is considered to be in a high power, low vehicle speed warm-up state, and the water pump is controlled to periodically switch between started and stopped states to avoid localized overheating of the engine and to place the thermal management system in a minimum power consumption state.

[0010] To achieve the above object, an embodiment of a second aspect of the present disclosure provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, realizes a thermal management control method according to the embodiment of the first aspect.

[0011] To achieve the above object, an embodiment of a third aspect of the present disclosure provides a thermal management control device for a vehicle, comprising a processor and a memory connected to each other, the memory storing a computer program including program instructions, and the processor configured to call the program instructions to execute the thermal management control method according to the embodiment of the first aspect.

[0012] To achieve the above object, an embodiment of a fourth aspect of the present disclosure provides a vehicle including an engine and a thermal management system, the thermal management system including a water pump, an air-cooled radiator, a thermostat, and a thermal management control device according to the embodiment of the third aspect.

[0013] The theoretical aspects and advantages of the present disclosure will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the present disclosure. [Brief description of the drawings]

[0014] [Figure 1] 1 is a schematic diagram of a vehicle according to an embodiment of the present disclosure. [Diagram 2] 1 is a flowchart of a thermal management control method according to one embodiment of the present disclosure. [Diagram 3] 4 is a flowchart of a thermal management control method according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, the embodiments of the present disclosure will be described in detail, and examples of the embodiments are shown in the drawings, in which 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 drawings are illustrative and are for interpreting the present disclosure, and should not be understood as limiting the present disclosure.

[0016] Hereinafter, a vehicle 100 according to an embodiment of the present disclosure, a thermal management control method thereof, a thermal management control device, and a computer-readable storage medium will be described with reference to FIGS. 1 and 2. FIG.

[0017] 1, a vehicle 100 includes an engine 110 and a thermal management system 120, which includes a water pump 121, an air-cooled radiator 122, a thermostat 123, and a thermal management controller 124. The thermal management controller 124 includes a processor 124a and a memory 124b connected to each other, the memory 124b stores a computer program including program instructions, and the processor 124a is configured to call the program instructions to execute the thermal management control method according to the embodiment. Also, a computer-readable storage medium according to the embodiment of the present disclosure stores a computer program that, when executed by the processor, realizes the thermal management control method according to the embodiment of the present disclosure.

[0018] 1, the engine 110 and the water pump 121 are connected to form a first cooling cycle, i.e., the coolant is pumped by the water pump 121 and flows through the engine 110 to cool the engine 110, and the air-cooled radiator 122 is connected to the engine 110 and the water pump 121 by a thermostat 123 to form a second cooling cycle, i.e., when the thermostat 123 is open, the coolant is pumped by the water pump 121 and flows through the engine 110 to cool the engine 110, and then flows through the thermostat 123 and enters the air-cooled radiator 122 to cool it. Note that the first cooling cycle is a small cycle that cools the engine 110, and the second cooling cycle is a large cycle that cools the engine 110.

[0019] As shown in FIG. 2 , a thermal management control method according to an embodiment of the present disclosure includes a step S1 of controlling the water pump to periodically switch between a started state and a stopped state when a current temperature of the engine is equal to or lower than a predetermined temperature threshold, a total power output of the engine is equal to or higher than a predetermined power threshold, and a current vehicle speed is equal to or lower than a predetermined vehicle speed threshold.

[0020] When the current temperature of the engine is below a predetermined temperature threshold, the engine 110 is considered to be in a warm-up state, but when the total output of the engine is above a predetermined output threshold and the current vehicle speed is below a predetermined vehicle speed threshold, i.e., the engine 110 is in a high output, low vehicle speed state, and the heat dissipation needs of the engine 110 are not high, but there is a risk of local overheating. Therefore, by controlling the water pump 121 to periodically switch between a start state and a stop state, the engine 110 is prevented from locally overheating, and the excessive heat dissipation causes the engine 110 to take too long a warm-up time, which increases the power consumption of the thermal management system 120, i.e., ensures the minimum power consumption of the thermal management system 120. Note that in the present disclosure, the parameter related to the temperature of the engine 110 is the temperature at which the coolant flows out of the engine 110. In some embodiments, the predetermined temperature threshold may be 60°C to 80°C, the predetermined output threshold may be 5kW to 8kW, and the predetermined vehicle speed threshold may be 5km / h to 10km / h. In some embodiments, the predetermined temperature threshold may be 80° C., the predetermined power threshold may be 5 kW, and the predetermined vehicle speed threshold may be 5 km / h.

[0021] In some embodiments, step S1 includes setting the water pump speed to a safe water pump speed when the water pump is in a start state. The safe water pump speed is a speed at a safe flow rate, and the safe flow rate is the minimum flow rate that can cool 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 water pump speed MAP is searched based on the current engine speed and the current engine torque to determine the safe water pump speed. The safe water pump speed MAP is determined by simulation and experiment in the research and development design stage according to the specific situation of the engine 110, under the condition of the minimum cooling flow rate that does not cause local overheating of the engine 110, and is preset in the thermal management control device 124.

[0022] In some embodiments, step S1 includes: controlling the water pump so that the water pump is in a starting state and switches to a stopped state after the starting time has elapsed; and controlling the water pump so that the water pump is in a stopped state and switches to a starting state after the stopping time has elapsed. In some embodiments, the starting time and the stopping time are both predetermined fixed values, and the time that the engine 110 is in a warm-up state with high power and low vehicle speed is not very long, so that the starting time and the stopping time are determined through simulation and experiment in the research and development design stage according to the specific situation of the engine 110, and are preset in the thermal management control device 124, so that the basic requirements can be met and the control program can be simplified. In other embodiments, the starting time is positively correlated with the current vehicle speed, and the stopping time is inversely correlated with the current vehicle speed. Obviously, the higher the current vehicle speed, the higher the heat dissipation needs of the engine 110, so the starting time can be increased and the stopping time can be decreased to more accurately ensure that the thermal management system 120 is in the lowest power consumption state.

[0023] In some embodiments, the thermal management control method according to the embodiments of the present disclosure further includes step S2 of controlling the rotation speed of the air-cooled radiator to 0 and controlling the opening of the thermostat to 0 when the current temperature of the engine is equal to or lower than the predetermined temperature threshold. Note that the rotation speed of the air-cooled radiator 122 refers to the rotation speed of the fan in the air-cooled radiator 122.

[0024] When the current temperature of the engine is equal to or lower than the above-mentioned predetermined temperature threshold, it is considered that the engine 110 is in a warm-up state, i.e., the heat dissipation need of the engine 110 is small and the engine 110 can warm up by its own heat generation, so the rotation speed of the air-cooled radiator 122 is controlled to 0 and the opening degree of the thermostat 123 is controlled to 0, thereby preventing the engine 110 from participating in the cooling of the second cooling cycle, thereby ensuring that the thermal management system 120 is in a minimum power consumption state.

[0025] In some embodiments, the thermal management control method according to the embodiments of the present disclosure further includes step S3 of controlling the water pump to stop when the current temperature of the engine is equal to or less than a predetermined temperature threshold and the total power output of the engine is less than a predetermined power threshold.

[0026] When the current temperature of the engine is below the predetermined temperature threshold and the total power of the engine is less than the predetermined power threshold, the engine 110 is considered to be in a low-power warm-up state, and at this time, the heat generation of the engine 110 is smaller, which is sufficient for the warm-up needs of the engine 110, and there is no risk of local overheating, i.e., no cooling is required, so the water pump 121 is controlled to stop, thereby ensuring that the thermal management system 120 is in a minimum power consumption state.

[0027] In some embodiments, the thermal management control method according to the embodiments of the present disclosure further includes step S4 of controlling the water pump speed to a safe water pump speed when the current temperature of the engine is equal to or less than a predetermined temperature threshold, the total engine power is equal to or greater than a predetermined power threshold, and the current vehicle speed is greater than a predetermined vehicle speed threshold.

[0028] When the current temperature of the engine is below a predetermined temperature threshold, the total engine output is above a predetermined output threshold, and the current vehicle speed is greater than a predetermined vehicle speed threshold, the engine 110 is in a high output, high vehicle speed warm-up state, and there is a higher risk of localized overheating of the engine 110 compared to a high output, low vehicle speed state. Therefore, by controlling the speed of the water pump 121 to maintain the safe water pump speed, a safe flow rate is ensured that the engine 110 will not locally overheat, and the thermal management system 120 is in a state of minimum power consumption.

[0029] In another embodiment, step S4 may be replaced by step S4a of controlling the water pump speed to be equal to or higher than a safe water pump speed and positively correlated with the current vehicle speed if the current engine temperature is equal to or lower than a predetermined temperature threshold, the total engine power is equal to or higher than a predetermined power threshold, and the current vehicle speed is greater than a predetermined vehicle speed threshold. By controlling the water pump speed to be higher as the current vehicle speed increases, the risk of localized overheating of engine 110 can be further reduced.

[0030] In some embodiments, the thermal management control method according to the embodiments of the present disclosure further includes the following steps S5 to S7.

[0031] In S5, if the current temperature of the engine is greater than the predetermined temperature threshold and the opening of the thermostat is equal to or greater than the predetermined opening threshold, the minimum fuel consumption MAP of the engine is searched for based on the current engine speed, the current engine torque, and the current ambient temperature to determine the total target heat release amount. In some embodiments, the predetermined opening threshold may be 95% to 100%, and specifically, the predetermined opening threshold may be 100%, that is, the thermostat 123 is fully open.

[0032] When the temperature of the engine 110 is equal to or higher than the predetermined temperature threshold, the warm-up of the engine 110 is considered to be completed, and the thermal management system 120 needs to continuously control the temperature of the engine 110, and when the opening of the thermostat 123 is equal to or higher than the predetermined opening threshold, the engine 110 is considered to have entered an operating state with high heat dissipation needs, and the water pump 121 and the air-cooled radiator 122 both need to participate in cooling the engine 110, so that the engine 110 reaches an operating state with the lowest fuel consumption, i.e., the highest efficiency. Specifically, the current engine speed, the current engine torque, and the current environmental temperature are used as input parameters to search for the minimum fuel consumption MAP of the engine, and finally output the total target heat dissipation amount that allows the engine 110 to reach an operating state with the lowest fuel consumption, i.e., the highest efficiency. The minimum fuel consumption MAP of the engine is determined through simulation and experiment in the research, development and design stage according to the specific situation of the vehicle 100, under the condition of minimizing the fuel consumption of the engine 110, and is preset in the thermal management control device 124. The current environmental temperature is 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.

[0033] In S6, the minimum power consumption MAP of the thermal management system is searched for based on the total target heat dissipation amount, the air-cooled radiator intake speed, and the current environmental temperature, and the target rotation speed of the water pump and the air-cooled radiator are determined.

[0034] When the opening degree of the thermostat 123 is equal to or greater than a predetermined opening degree threshold, there are an infinite number of combinations of the rotation speed of the water pump 121 and the rotation speed of the air-cooled radiator 122 that allow the engine 110 to cool through the second cooling cycle and reach an operating state with the lowest fuel consumption, i.e., the highest efficiency. In the embodiment of the present disclosure, the total target heat release amount, the intake speed of the air-cooled radiator 122, and the current environmental temperature are used as input parameters to search for the minimum power consumption MAP of the thermal management system, and a combination of the target rotation speed of the water pump and the target rotation speed of the air-cooled radiator is output, so that the thermal management system 120 operates in the minimum power consumption state. The minimum power consumption MAP of the thermal management system is determined through simulation and experimentation under the condition that the power consumption of the thermal management system 120 is minimized during the research and development design stage according to the specific situation of the thermal management system 120, and is preset in the thermal management control device 124. In some embodiments, the intake speed of the air-cooled radiator 122 is determined based on the current vehicle speed and the environmental wind speed.

[0035] In S7, the rotation speed of the water pump is controlled to a target rotation speed of the water pump, and the rotation speed of the air-cooled radiator is controlled to a target rotation speed of the air-cooled radiator.

[0036] Based on the minimum fuel consumption MAP of a specified engine, a total target heat dissipation amount required for the engine to reach a state of minimum fuel consumption or maximum efficiency under the current operating conditions is determined; and based on the minimum power consumption MAP of a specified thermal management system, a combination of the speed of the water pump 121 and the speed of the air-cooled radiator 122 when the power consumption of the thermal management system 120 in the current environment is minimum, i.e., the target speed of the water pump and the target speed of the air-cooled radiator, is determined; and the water pump 121 and the air-cooled radiator 122 are controlled to operate at the target speed of the water pump and the target speed of the air-cooled radiator, respectively, thereby achieving joint optimization of the power consumption of the thermal management system and the fuel consumption of the engine.

[0037] In some embodiments, step S5 includes the following steps S501 to S503.

[0038] In S501, the minimum fuel consumption MAP of the engine is searched for based on the current engine speed, the current engine torque, and the current environmental temperature, and the target temperature of the engine is determined.

[0039] In S502, the amount of heat generated by the engine is determined based on the current engine speed and the current engine torque.

[0040] In S503, a total target heat release amount is determined based on the current temperature of the engine, the target temperature of the engine, and the amount of heat generated by the engine.

[0041] Using the current engine speed, the current engine torque, and the current ambient temperature as input parameters, the minimum fuel consumption MAP of the engine is searched for, and the target temperature of the engine is output, which allows the engine 110 to reach an operating state with the lowest fuel consumption, i.e., the highest efficiency. In some embodiments, based on the difference ΔT between the current engine temperature and the target engine temperature, it can be calculated that the amount of heat required from the current engine temperature to the target temperature is C·M·ΔT, where C is the specific heat capacity of the coolant, M is the mass of the coolant, and the mass of the coolant is related to the flow rate. Therefore, the total target heat dissipation amount for cooling the engine can be obtained by taking the difference between the engine heat generation amount and C·M·ΔT.

[0042] In some embodiments, the thermal management control method according to the embodiments of the present disclosure further includes the following steps S8 to S11.

[0043] In S8, if the current temperature of the engine is equal to or higher than a predetermined temperature threshold and the opening of the thermostat is smaller than a predetermined opening threshold, the water pump speed is controlled to a safe water pump speed and the air-cooled radiator speed is controlled to 0.

[0044] In S9, the minimum fuel consumption MAP of the engine is searched for based on the current engine speed, the current engine torque, and the current environmental temperature, and the target temperature of the engine is determined.

[0045] In S10, the target opening of the thermostat is determined based on the current temperature of the engine and the target temperature of the engine.

[0046] In S11, the opening degree of the thermostat is controlled to the target opening degree of the thermostat.

[0047] When the temperature of engine 110 is equal to or higher than a predetermined temperature threshold and the opening of thermostat 123 is less than a predetermined opening threshold, it is considered that engine 110 has completed warming up but has not yet entered an operating state in which heat dissipation is highly required. At this time, by controlling the opening of thermostat 123, engine 110 reaches a target temperature and operates with minimum fuel consumption and maximum efficiency, and water pump 121 operates at a minimum RPM and the air-cooled radiator stops operating, so that thermal management system 120 is in a minimum power consumption state.

[0048] As shown in FIG. 3, in some embodiments, the control method for a thermal management system according to an embodiment of the present disclosure includes the following steps S101 to S117.

[0049] In S101, it is determined whether the current temperature of the engine is equal to or lower than a predetermined temperature threshold. If the result is Yes, it is considered that the engine 110 is in the warm-up phase, and step S102 is executed. If the result is No, it is considered that the engine has finished the warm-up phase and entered the running phase, and step S108 is executed.

[0050] In S102, when the engine 110 is in the warm-up stage, the rotation speed of the air-cooled radiator is controlled to 0, and the opening of the thermostat is controlled to 0.

[0051] In S103, it is determined whether the total engine output is equal to or greater than a predetermined output threshold. If the result is Yes, it is considered that the engine 110 is in a high-output warm-up mode, and step S104 is executed. If the result is No, it is considered that the engine 110 is in a low-output warm-up mode, and step S107 is executed.

[0052] In S104, it is determined whether the current vehicle speed is equal to or lower than a predetermined vehicle speed threshold. If the result is Yes, it is considered that the engine 110 is in a high power and low vehicle speed warm-up mode, and step S105 is executed. If the result is No, it is considered that the engine 110 is in a high power and high vehicle speed warm-up mode, and step S106 is executed.

[0053] In S105, when the engine 110 is in a warm-up mode with high power and low vehicle speed, the water pump is controlled to periodically switch between a started state and a stopped state, and when the water pump is in the started state, the water pump speed is a safe water pump speed. In some embodiments, the water pump is controlled to switch to a stopped state when the water pump is in the started state after a start time has elapsed, and the water pump is controlled to switch to the started state when the water pump is in the stopped state after a stop time has elapsed, and the start time and stop time are predetermined fixed values.

[0054] In S106, when engine 110 is in a warm-up mode with high power and high vehicle speed, the water pump is controlled to a started state and the water pump speed is set to a safe water pump speed.

[0055] In S107, when the engine 110 is in a low-output warm-up mode, the water pump is controlled to be stopped.

[0056] In S108, following S101, when engine 110 is in the running phase, it is determined whether or not the thermostat opening is equal to or greater than a predetermined opening threshold. If the result is Yes, the heat dissipation needs of engine 110 are considered to be high, and step S109 is executed. If the result is No, the heat dissipation needs of engine 110 are considered to be relatively low, and step S114 is executed.

[0057] In S109, when the heat dissipation need of the engine 110 is high, the minimum fuel consumption MAP of the engine is searched based on the current engine speed, the current engine torque, and the ambient temperature to determine the target temperature of the engine. When the operating temperature of the engine 110 in the current situation is the target temperature of the engine, the engine 110 is considered to be in the minimum fuel consumption state.

[0058] In S110, the amount of heat generated by the engine is determined based on the current engine speed and the current engine torque.

[0059] In S111, a total target heat release amount is determined based on the current temperature of the engine, the target temperature of the engine, and the amount of heat generated by the engine.

[0060] In S112, the minimum power consumption MAP of the thermal management system is searched based on the input total target heat dissipation amount, the air intake speed of the air-cooled radiator, and the environmental temperature, and the target rotation speed of the water pump and the target rotation speed of the air-cooled radiator are determined. Under the current heat dissipation needs and the current environment, if the rotation speed of the water pump 121 is the target rotation speed of the water pump and the rotation speed of the air-cooled radiator 122 is the target rotation speed of the air-cooled radiator, it is considered that the thermal management system 120 is in the minimum power consumption state.

[0061] In S113, the rotation speed of the water pump is controlled to a target rotation speed of the water pump, and the rotation speed of the air-cooled radiator is controlled to a target rotation speed of the air-cooled radiator.

[0062] In S114, following S108, if the heat dissipation needs of engine 110 are relatively low, the water pump speed is controlled to a safe water pump speed, and the air-cooled radiator speed is controlled to zero.

[0063] In S115, the minimum fuel consumption MAP of the engine is searched for based on the current engine speed, the current engine torque, and the current environmental temperature, and the target temperature of the engine is determined.

[0064] In S116, the target opening of the thermostat is determined based on the current temperature of the engine and the target temperature of the engine.

[0065] In S117, the opening degree of the thermostat is controlled to the target opening degree of the thermostat.

[0066] In the thermal management control method according to the embodiment of the present disclosure, when the current temperature of the engine is below a predetermined temperature threshold, it is considered that the engine 110 is in a warm-up state. However, when the total output of the engine is above a predetermined output threshold and the current vehicle speed is below a predetermined vehicle speed threshold, i.e., the engine 110 is in a high output, low vehicle speed state, at this time, the heat dissipation need of the engine 110 is not high, but there is a risk of localized overheating. Therefore, by controlling the water pump 121 to periodically switch between a started state and a stopped state, it is possible to avoid localized overheating of the engine 110 and to avoid an increase in the power consumption of the thermal management system 120 due to excessive heat dissipation resulting in a long warm-up time of the engine 110, i.e., to ensure the minimum power consumption of the thermal management system 120.

[0067] In the description of this specification, a description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the exemplary expressions of the above terms are not necessarily limited to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be appropriately combined in any one or more embodiments or examples. In addition, if not mutually inconsistent, a person skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples.

[0068] Additionally, the terms "first" and "second" are merely descriptive and should not be understood as indicating or suggesting a relative importance or implying a number of the technical features depicted. Thus, a feature qualified with "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of this disclosure, "plurality" means at least two, e.g., two, three, etc., unless otherwise clearly and specifically limited.

[0069] Descriptions of any process or method described in a flowchart or otherwise in the present disclosure may be understood to represent modules, segments, or portions of code that include one or more executable instructions for implementing specific logical functions or process steps, and the scope of the preferred embodiments of the present disclosure may include alternative implementations, in which functions are performed substantially simultaneously or in reverse order depending on such functions rather than in the order shown or described, as should be understood by those skilled in the art to which the embodiments of the present disclosure pertain.

[0070] The logic and / or steps shown in the flow charts or otherwise described in this disclosure may be considered, for example, as an ordered list of executable instructions for implementing logical functions, and may be tangibly embodied in any computer-readable storage medium for use by or in combination with an instruction execution system, device, or apparatus (e.g., a computer-based system, a system including a processor, or other system capable of reading instructions from and executing instructions from an instruction execution system, device, or apparatus). As used herein, a "computer-readable storage medium" may be any device capable of storing, storing, communicating, propagating, or transmitting a program for use by or in combination with an instruction execution system, device, or apparatus. More specific examples (non-exhaustive list) of computer-readable storage media include an electrical connection having 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 programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable read-only memory (CD-ROM). The computer-readable storage medium may also be paper or other suitable medium on which the program may be printed, such that the program may be obtained electronically and thereafter stored in computer memory, for example by optically scanning the paper or other medium and then editing, interpreting, or processing in any other suitable manner as required.

[0071] It should be understood that each part of the present disclosure can be realized by hardware, software, firmware, or a combination thereof. In the above embodiment, a plurality of steps or methods can be realized by software or firmware stored in a memory and executed by an appropriate instruction execution system. For example, when realized by hardware, as in another embodiment, it can be realized by any one or combination of known techniques in the art, such as a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combination logic gate circuit, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0072] As can be understood by those skilled in the art, all or some of the steps included in the methods of the above embodiments can be completed by issuing instructions to relevant hardware by a program, and the above program can be stored in a computer-readable storage medium, and when the program is executed, it includes one or a combination of the steps of the method embodiments.

[0073] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing module, may exist physically separately, or two or more units may be integrated into one module. The integrated module may be realized in the form of hardware or in the form of a software functional module. When the integrated module is realized in the form of a software functional module and sold or used as an independent product, it may be stored in a computer-readable storage medium.

[0074] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, the above embodiments are illustrative and should not be understood as limiting the present disclosure, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. [Explanation of symbols]

[0075] 100 vehicles 110 Engine 120 Thermal Management System 121 Water Pump 122 Air-cooled radiator 123 Thermostat 124 Thermal Management Control Device 124a processor 124b memory

Claims

1. 1. A thermal management control method for a vehicle, the vehicle including an engine and a thermal management system, the thermal management system including a water pump, the engine and the water pump connected to form a first cooling cycle, comprising: controlling the water pump to periodically switch between a started state and a stopped state when a current temperature of the engine is equal to or less than a predetermined temperature threshold, a total engine power is equal to or greater than a predetermined power threshold, and a current vehicle speed is equal to or less than a predetermined vehicle speed threshold; the thermal management system further includes an air-cooled radiator and a thermostat, the air-cooled radiator being connected to the engine and the water pump via the thermostat to form a second cooling cycle; The thermal management control method includes: When the current temperature of the engine is greater than the predetermined temperature threshold and the opening of the thermostat is equal to or greater than the predetermined opening threshold, searching for a minimum fuel consumption map of the engine based on the current engine speed, the current engine torque, and the current environmental temperature to determine a total target heat release amount; retrieving a minimum power consumption map of a thermal management system based on the total target heat dissipation amount, the air intake speed of the air-cooled radiator, and the current environmental temperature to determine a target rotation speed of a water pump and a target rotation speed of an air-cooled radiator; controlling a rotation speed of the water pump to a target rotation speed of the water pump, and controlling a rotation speed of the air-cooled radiator to a target rotation speed of the air-cooled radiator.

2. When the current temperature of the engine is equal to or higher than the predetermined temperature threshold and the opening of the thermostat is equal to or higher than the predetermined opening threshold, a minimum fuel consumption map of the engine is searched for based on a current engine speed, a current engine torque, and a current environmental temperature to determine a total target heat release amount of the engine, determining a target temperature of the engine by searching for a minimum fuel consumption map of the engine based on a current rotation speed of the engine, a current torque of the engine, and a current environmental temperature; determining a heat generation amount of the engine based on a current speed of the engine and a current torque of the engine; and determining said total target heat release based on a current temperature of said engine, a target temperature of said engine, and a heat release rate of said engine.

3. A thermal management control method for a vehicle, the vehicle including an engine and a thermal management system, the thermal management system including a water pump, the engine and the water pump being connected to form a first cooling cycle, controlling the water pump to periodically switch between a started state and a stopped state when a current temperature of the engine is equal to or less than a predetermined temperature threshold, a total engine power is equal to or greater than a predetermined power threshold, and a current vehicle speed is equal to or less than a predetermined vehicle speed threshold; the thermal management system further includes an air-cooled radiator and a thermostat, the air-cooled radiator being connected to the engine and the water pump via the thermostat to form a second cooling cycle; The thermal management control method includes: When the current temperature of the engine is equal to or higher than the predetermined temperature threshold and the opening of the thermostat is smaller than a predetermined opening threshold, controlling the rotation speed of the water pump to a safe rotation speed, which is a rotation speed at a minimum flow rate that can cool the engine under a certain load, and controlling the rotation speed of the air-cooled radiator to 0; determining a target temperature of the engine by searching for a minimum fuel consumption map of the engine based on a current engine speed, a current engine torque, and a current environmental temperature; determining a target thermostat opening based on a current temperature of the engine and a target temperature of the engine; and controlling the opening of the thermostat to a target opening of the thermostat.

4. controlling the water pump to periodically switch between a started state and a stopped state when a current temperature of the engine is equal to or less than the predetermined temperature threshold, a total engine power is equal to or greater than the predetermined power threshold, and a current vehicle speed is equal to or less than the predetermined vehicle speed threshold; 3. The thermal management control method according to claim 1, further comprising the step of setting the speed of the water pump to a safe speed when the water pump is in a starting state, the safe speed being the speed at which the water pump can cool the engine under a certain load with a minimum flow rate.

5. The step of controlling the water pump to periodically switch between a started state and a stopped state when a current temperature of the engine is equal to or less than the predetermined temperature threshold, a total power output of the engine is equal to or greater than the predetermined power threshold, and a current vehicle speed is equal to or less than the predetermined vehicle speed threshold, comprises:

4. The thermal management control method of claim 3, further comprising the step of: causing the water pump to rotate at the safe speed if the water pump is in a started state.

6. controlling the water pump to periodically switch between a started state and a stopped state when a current temperature of the engine is equal to or less than the predetermined temperature threshold, a total engine power is equal to or greater than the predetermined power threshold, and a current vehicle speed is equal to or less than the predetermined vehicle speed threshold; controlling the water pump to switch to a stopped state after the water pump is in a started state and a start time has elapsed; and controlling the water pump to switch to a started state after the water pump is in a stopped state and a stop time has elapsed, A thermal management control method according to any one of claims 1 to 3, characterized in that the start time and the stop time are both predetermined fixed values, or the start time and the current vehicle speed are positively correlated, and the stop time and the current vehicle speed are inversely correlated.

7. 4. The thermal management control method according to claim 1, further comprising controlling the water pump to stop when a current temperature of the engine is equal to or lower than the predetermined temperature threshold and a total power output of the engine is less than the predetermined power threshold.

8. If the current temperature of the engine is equal to or less than the predetermined temperature threshold, the total power of the engine is equal to or greater than the predetermined power threshold, and the current vehicle speed is greater than the predetermined vehicle speed threshold, control the water pump speed to a safe speed, which is the minimum flow rate that can cool the engine under a certain load; or 3. The thermal management control method according to claim 1, further comprising: controlling the rotational speed of the water pump so that the rotational speed is greater than the safe rotational speed and positively correlated with the current vehicle speed when the current temperature of the engine is equal to or lower than the predetermined temperature threshold, the total output of the engine is equal to or higher than the predetermined output threshold, and the current vehicle speed is greater than the predetermined vehicle speed threshold.

9. When the current temperature of the engine is equal to or lower than the predetermined temperature threshold, the total power of the engine is equal to or higher than the predetermined power threshold, and the current vehicle speed is greater than the predetermined vehicle speed threshold, controlling the water pump speed to the safe speed, or 4. The thermal management control method of claim 3, further comprising: controlling a rotational speed of the water pump to be greater than the safe rotational speed and positively correlated with the current vehicle speed when the current temperature of the engine is equal to or less than the predetermined temperature threshold, the total power of the engine is equal to or greater than the predetermined power threshold, and the current vehicle speed is greater than the predetermined vehicle speed threshold.

10. the thermal management system further includes an air-cooled radiator and a thermostat, the air-cooled radiator connected to the engine and the water pump by the thermostat to form a second cooling cycle; The thermal management control method according to any one of claims 1 to 3, further comprising the steps of controlling the rotation speed of the air-cooled radiator to 0 and controlling the opening of the thermostat to 0 when the current temperature of the engine is equal to or lower than the predetermined temperature threshold.

11. A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the thermal management control method according to any one of claims 1 to 3.

12. A computer program, which, when executed by a processor, realizes the thermal management control method described in any one of claims 1 to 3.

13. A processor and a memory connected to each other, A vehicle thermal management control device, characterized in that the memory stores a computer program including program instructions, and the processor is configured to call the program instructions to execute the thermal management control method described in any one of claims 1 to 3.

14. an engine and a thermal management system, the thermal management system including a water pump, an air-cooled radiator, a thermostat, and the thermal management control device of claim 13; 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 via the thermostat to form a second cooling cycle.

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