CN115247593A - Vehicle and thermal management control method, device and storage medium thereof - Google Patents

Vehicle and thermal management control method, device and storage medium thereof Download PDF

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Publication number
CN115247593A
CN115247593A CN202110458538.7A CN202110458538A CN115247593A CN 115247593 A CN115247593 A CN 115247593A CN 202110458538 A CN202110458538 A CN 202110458538A CN 115247593 A CN115247593 A CN 115247593A
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China
Prior art keywords
engine
water pump
current
thermal management
preset
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CN202110458538.7A
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Chinese (zh)
Inventor
朱福堂
王春生
黄秋萍
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BYD Co Ltd
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BYD Co Ltd
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Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN202110458538.7A priority Critical patent/CN115247593A/en
Priority to MX2023011980A priority patent/MX2023011980A/en
Priority to PCT/CN2022/088512 priority patent/WO2022228310A1/en
Priority to JP2023560372A priority patent/JP2024516088A/en
Priority to BR112023021664A priority patent/BR112023021664A2/en
Priority to EP22794781.9A priority patent/EP4296482A1/en
Priority to AU2022267591A priority patent/AU2022267591A1/en
Publication of CN115247593A publication Critical patent/CN115247593A/en
Priority to US18/373,221 priority patent/US20240018895A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/18—Indicating devices; Other safety devices concerning coolant pressure, coolant flow, or liquid-coolant level
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and out of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/13—Ambient temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/50—Temperature using two or more temperature sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/62—Load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/66—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2037/00—Controlling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2050/00—Applications
    • F01P2050/22—Motor-cars

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The application provides a vehicle and a thermal management control method, equipment and a storage medium thereof, wherein the vehicle comprises an engine and a thermal management system, the thermal management system comprises a water pump, the engine and the water pump are connected to form a first cooling cycle, and the thermal management control method comprises the following steps: and when the current temperature of the engine is less than or equal to a preset temperature threshold value, the total power of the engine is greater than or equal to a preset power threshold value, and the current vehicle speed is less than or equal to a preset vehicle speed threshold value, controlling the water pump to be periodically switched between a starting state and a stopping state. According to the thermal management control method, when the engine is in a warm-up mode with high power and low vehicle speed, the water pump is periodically controlled to be switched between the starting state and the stopping state, so that the engine is prevented from being locally overheated, and the thermal management system is enabled to be in the lowest power consumption state.

Description

Vehicle and thermal management control method, device and storage medium thereof
Technical Field
The application belongs to the technical field of vehicles, and particularly relates to a vehicle and a thermal management control method, equipment and a storage medium thereof.
Background
According to the thermal management control method for the vehicle engine in the prior art, the opening degree of a thermostat, the rotating speed of an electronic water pump and the rotating speed of a radiator fan are adjusted in a priority order from high to low, so that the heat dissipation requirement under each working condition is met, however, the problem that how to ensure that the engine is not locally overheated in the engine warming process and the thermal management system is at the lowest power consumption is not considered.
Disclosure of Invention
In view of the above technical problems, a first object of the present application is to provide a thermal management control method for a vehicle, which, when an engine is in a high-power low-speed warm-up mode, prevents the engine from being locally overheated and enables a thermal management system to be in a lowest power consumption state by periodically controlling a water pump to switch between a start state and a stop state.
A second object of the present application is to propose a computer-readable storage medium.
A third object of the present application is to propose a thermal management control device for a vehicle.
A fourth object of the present application is to propose a vehicle.
In order to achieve the above object, a first aspect of the present application provides a thermal management control method for a vehicle, where the vehicle includes an engine and a thermal management system, the thermal management system includes a water pump, and the engine and the water pump are connected to form a first cooling cycle, and the control method includes:
and when the current temperature of the engine is less than or equal to a preset temperature threshold value, the total power of the engine is greater than or equal to a preset power threshold value, and the current vehicle speed is less than or equal to a preset vehicle speed threshold value, controlling the water pump to be periodically switched between a starting state and a stopping state.
When the current temperature of the engine is smaller than or equal to the preset temperature threshold, the total power of the engine is larger than or equal to the preset power threshold, and the current vehicle speed is smaller than or equal to the preset vehicle speed threshold, the engine can be considered to be in a warm-up state with high power and low vehicle speed, and the water pump is periodically controlled to be switched between a starting state and a stopping state, so that the engine is prevented from being locally overheated, and the thermal management system is enabled to be in a lowest power consumption state.
To achieve the above object, a second aspect of the present application provides a computer-readable storage medium, which stores a computer program, where the computer program is adapted to be executed by a processor to implement the thermal management control method according to the first aspect of the present application.
In order to achieve the above object, a third aspect of the present application provides a thermal management control device for a vehicle, including a processor and a memory, where the processor and the memory are connected to each other; the memory is configured 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 the embodiment of the first aspect.
In order to achieve the above object, a fourth aspect of the present application provides a vehicle, including an engine and a thermal management system, where the thermal management system includes a water pump, an air-cooled radiator, a thermostat, and the thermal management control apparatus according to the third aspect of the present application.
The theoretical aspects and advantages of the present application 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 application.
Drawings
FIG. 1 is a schematic view of a vehicle provided in an embodiment of the present application.
Fig. 2 is a schematic flowchart of a thermal management control method according to an embodiment of the present application.
Reference numerals:
100. a vehicle; 110. an engine; 120. a thermal management system; 121. a water pump; 122. an air-cooled radiator; 123. a thermostat; 124. a thermal management control device; 124a, a processor; 124b, and a memory.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.
A vehicle 100, a thermal management control method thereof, a thermal management control apparatus, and a computer-readable storage medium according to an embodiment of the present application are described below with reference to fig. 1 to 2.
As shown in fig. 1, 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. Thermal management control device 124 includes a processor 124a and a memory 124b, where processor 124a and memory 124b are connected to each other, and memory 124b is used for storing a computer program, where the computer program includes program instructions, and processor 124a is configured to call the program instructions to execute the thermal management control method provided by the embodiment. In addition, the computer-readable storage medium provided by the embodiment of the present application stores a computer program, and the computer program is executed by a processor to implement the thermal management control method provided by the embodiment of the present application.
As shown in fig. 1, the engine 110 and the water pump 121 are connected to form a first cooling cycle, i.e., coolant is pumped by the water pump 121 through the engine 110 and cools the engine 110; the air-cooled radiator 122 is connected with 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 opened, the coolant is pumped by the water pump 121 to pass through the engine 110 and cool the engine 110, and then enters the air-cooled radiator 122 through the thermostat 123 to be cooled. The first cooling cycle is a small cycle of cooling engine 110, and the second cooling cycle is a large cycle of cooling engine 110.
The thermal management control method provided by the embodiment of the application comprises the following steps of S1: and when the current temperature of the engine is less than or equal to a preset temperature threshold value, the total power of the engine is greater than or equal to a preset power threshold value, and the current vehicle speed is less than or equal to a preset vehicle speed threshold value, controlling the water pump to be switched between a starting state and a stopping state periodically.
When the current temperature of the engine is less than or equal to the preset temperature threshold, the engine 110 is considered to be in a warm-up state, and when the total power of the engine 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 and low-vehicle-speed state, at this time, the heat dissipation requirement of the engine 110 is not high, but there is a risk of local overheating, so that the engine 110 is prevented from being locally overheated by controlling the water pump 121 to periodically switch between the start-up state and the stop-running state, and the excessive warm-up time of the engine 110 and the increase of the power consumption of the thermal management system 120 caused by excessive heat dissipation are avoided, that is, the minimum power consumption of the thermal management system 120 is ensured. In the present application, the temperature-related parameter of the engine 110 is a temperature at which the coolant flows out of the engine 110. In some embodiments, the preset temperature threshold can be 60-80 ℃, the preset power threshold can be 5-8 kW, and the preset vehicle speed threshold can be 5-10 km/h; in some cases, the predetermined temperature threshold may be 80 ℃, the predetermined power threshold may be 5kW, and the predetermined vehicle speed threshold may be 5km/h.
In some embodiments, step S1 comprises: when the water pump is in a starting state, the rotating speed of the water pump is the safe rotating speed of the water pump. The safe water pump rotation speed is a rotation speed at a safe flow rate, and the safe flow rate is a flow rate that satisfies a minimum flow rate value for cooling a cylinder block and a cylinder head of an engine under a constant load, that is, a flow rate at which local overheating or boiling does not occur. In some embodiments, the water pump safe rotating speed MAP is inquired according to the current rotating speed of the engine and the current torque of the engine, and the water pump safe rotating speed is determined; the water pump safe rotation speed MAP is calibrated through simulation and experiment in a development and design stage according to specific conditions of the engine 110 under the condition that the minimum cooling flow of the engine 110 without local overheating is set in the thermal management control device 124.
In some embodiments, step S1 comprises: after the water pump is in a starting state and the starting time is passed, controlling the water pump to be switched to a stalling state; and after the water pump is in a stalling state and the stalling time is passed, controlling the water pump to be switched to a starting state. In some embodiments, the start time and the stop time are both preset fixed values, and since the time that 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 are preset in the thermal management control device 124, the basic requirements can be met, and the control procedure can be made simple. In other embodiments, the start-up time is positively correlated with the current vehicle speed and the stop-run time is inversely correlated with the current vehicle speed, and obviously, the higher the current vehicle speed is, the higher the heat dissipation requirement of the engine 110 is, thereby increasing the start-up time and reducing the stop-run time, and more accurately ensuring that the thermal management system 120 is in the lowest power consumption state.
In some embodiments, the thermal management control method provided in the embodiment of the present application further includes step S2: and when the current temperature of the engine is less than or equal to the preset temperature threshold, controlling the rotating speed of the air-cooled radiator to be 0 and controlling the opening of the thermostat to be 0. The rotation speed of the air-cooled heat sink 122 refers to the rotation speed of a fan in the air-cooled heat sink 122.
When the current temperature of the engine is less than or equal to the preset temperature threshold, it may be considered that the engine 110 is in a warm-up state, that is, the heat dissipation requirement of the engine 110 is small, and the engine 110 may be warmed up by self-heating, so the rotation speed of the air-cooled radiator 122 is controlled to be 0, and the opening of the thermostat 123 is controlled to be 0, so that the engine 110 does not participate in cooling of the second cooling cycle, thereby ensuring that the thermal management system 120 is in the lowest power consumption state.
In some embodiments, the thermal management control method provided in the embodiments of the present application further includes step S3: and 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, controlling the water pump to stop rotating.
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 engine 110 is considered to be in a low-power warm-up state, at this time, the heat productivity of the engine 110 is relatively low, the engine can be completely used for the warm-up requirement of the engine 110, and no risk of local overheating exists, that is, cooling is not needed, so that the heat management system 120 is ensured to be in a lowest power consumption state by controlling the water pump 121 to stop.
In some embodiments, the thermal management control method provided in the embodiment of the present application further includes step S4: and when the current temperature of the engine is less than or equal to a preset temperature threshold value, the total power of the engine is greater than or equal to a preset power threshold value, and the current speed of the vehicle is greater than a preset vehicle speed threshold value, controlling the rotating speed of the water pump to be the safe rotating 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 engine 110 can be considered to be in a warm-up state of high power and high vehicle speed, and the engine 110 has a higher risk of local overheating compared with the engine 110 in the high-power and low-vehicle speed state, so that the rotating speed of the water pump 121 is controlled to be kept at the safe rotating speed of the water pump, the safe flow rate of the engine 110 without local overheating is ensured, and the thermal management system 120 is ensured to be in the lowest power consumption state.
In other embodiments, step S4 may be replaced with step S4a: and when the current temperature of the engine is less than or equal to a preset temperature threshold value, the total power of the engine is greater than or equal to a preset power threshold value, and the current vehicle speed is greater than a preset vehicle speed threshold value, controlling the rotating speed of the water pump to be greater than or equal to the safe rotating speed of the water pump and to be positively correlated with the current vehicle speed. Controlling the speed of the water pump to increase with increasing current vehicle speed further reduces the risk of local overheating of the engine 110.
In some embodiments, the thermal management control method provided in the embodiments of the present application further includes the following steps S5 to S8.
S5, when the current temperature of the engine is higher than a preset temperature threshold value and the opening of the thermostat is higher than or equal to a preset opening threshold value, inquiring the MAP (maximum oil consumption) of the engine according to the current rotating speed of the engine, the current torque of the engine and the current ambient temperature, and determining the total target heat dissipation capacity; 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 opened.
When the temperature of the engine 110 is greater than or equal to the preset temperature threshold, it may be considered that the engine 110 has been warmed up, at this time, the thermal management system 120 needs to continuously control the temperature of the engine 110, and when the opening degree of the thermostat 123 is greater than or equal to the preset opening degree threshold, it may be considered that the engine 110 has entered an operating state with a high heat dissipation requirement, at this time, both the water pump 121 and the air-cooled radiator 122 need to participate in cooling of the engine 110, and the engine 110 is brought to an operating state with the lowest oil consumption, that is, the highest efficiency. Specifically, the current engine speed, the current engine torque and the current ambient temperature are used as input parameters, the MAP with the lowest oil consumption of the engine is queried, and the total target heat dissipation amount which can enable the engine 110 to reach the working state with the lowest oil consumption, namely the highest efficiency, is finally output. The MAP is calibrated through simulation and experiment under the condition that the fuel consumption of the engine 110 is the lowest in the development and design stage according to the specific conditions of the vehicle 100, and is preset in the thermal management control device 124. Here, the current ambient temperature refers to an air temperature outside the vehicle, that is, an intake air temperature of the engine 110 and an intake air temperature of the air-cooled radiator 122.
And S6, inquiring the lowest power consumption MAP of the heat management system according to the total target heat dissipation capacity, the air inlet speed of the air-cooled radiator and the current environment temperature, and determining the target rotating speed of the water pump and the target rotating speed of the air-cooled radiator.
When the opening degree of the thermostat 123 is greater than or equal to the preset opening degree threshold value, the engine 110 is cooled through a second cooling cycle, wherein a number of rotation speed combinations of the water pump 121 and the air-cooled radiator 122, which enable the engine 110 to reach a working state with the lowest oil consumption, that is, the highest efficiency, are available, and in the embodiment of the present application, the total target heat dissipation amount, the air intake speed of the air-cooled radiator 122 and the current ambient temperature are used as input parameters, the minimum power consumption MAP of the thermal management system is queried, and the 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 works in a state with the lowest power consumption. The MAP is calibrated by simulation and experiment under the condition that the thermal management system 120 consumes the lowest power in the development and 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 speed of the intake air to the air-cooled radiator 122 is determined based on the current vehicle speed and the ambient wind speed.
And S7, controlling the rotating speed of the water pump to be the target rotating speed of the water pump, and controlling the rotating speed of the air-cooled radiator to be the target rotating speed of the air-cooled radiator.
The total target heat dissipation amount required by the engine to reach the state of lowest oil consumption or highest efficiency under the current working condition is determined through the preset minimum oil consumption MAP of the engine, the combination of the rotating speed of the water pump 121 and the rotating speed of the air-cooled radiator 122 of the thermal management system 120 with the lowest power consumption under the current environment, namely the target rotating speed of the water pump and the target rotating speed of the air-cooled radiator, is determined through the preset minimum power consumption MAP of the thermal management system, the water pump 121 and the air-cooled radiator 122 are controlled to operate at the target rotating speed of the water pump and the target rotating speed of the air-cooled radiator respectively, and therefore common optimization of the power consumption of the thermal management system and the oil consumption of the engine is achieved.
In some embodiments, step S5 includes the following steps S501-S503.
S501, inquiring the MAP with the lowest oil consumption of the engine according to the current rotating speed, the current torque and the current environment temperature of the engine, and determining the target temperature of the engine;
s502, determining the heat productivity of the engine according to the current rotating speed and the current torque of the engine;
and S503, determining the total target heat dissipation amount according to the current temperature of the engine, the target temperature of the engine and the heat productivity of the engine.
The current rotation speed of the engine, the current torque of the engine and the current ambient temperature are used as input parameters, the MAP with the lowest oil consumption of the engine is inquired, and the target temperature of the engine, which enables the engine 110 to reach the working state with the lowest oil consumption, namely the highest efficiency, is output. In some embodiments, Δ is based on the difference between the current engine temperature and the target engine temperatureTThe heat quantity required by the engine from the current temperature to the target temperature can be calculated as C.M.DELTA.TWhere C is the coolant specific heat capacity and M is the coolant mass, which is related to the flow. Thus, the engine heating value is related to C.M.DELTA.TAs a difference, a total target heat dissipation for engine cooling may be obtained.
In some embodiments, the thermal management control method provided in the embodiments of the present application further includes the following steps S8 to S11.
S8, when the current temperature of the engine is greater than or equal to a preset temperature threshold value and the opening degree of the thermostat is smaller than a preset opening degree threshold value, controlling the rotating speed of the water pump to be a water pump safe rotating speed and controlling the rotating speed of the air cooling radiator to be 0;
s9, inquiring the MAP with the lowest oil consumption of the engine according to the current rotating speed, the current torque and the current environment temperature of the engine, and determining the target temperature of the engine;
s10, determining the target opening of the thermostat according to the current temperature of the engine and the target temperature of the engine;
and S11, controlling the opening of the thermostat to be the target opening of the thermostat.
When the temperature of the engine 110 is greater than or equal to the preset temperature threshold and the opening degree of the thermostat 123 is smaller than the preset opening degree threshold, it can be considered that the engine 110 is warmed up, but the engine 110 does not enter a working state with a high heat dissipation requirement, at this time, the opening degree of the thermostat 123 can be controlled, so that the engine 110 reaches the target temperature to work in a state of lowest oil consumption and highest efficiency, and meanwhile, the heat management system 120 is in a state of lowest power consumption because the water pump 121 runs at the lowest rotating speed and the air-cooled radiator stops running.
As shown in FIG. 2, in some embodiments, the thermal management system control method provided by the embodiments of the present application includes the following steps S101 to S117.
S101, judging whether the following conditions are met: if the current temperature of the engine is smaller than or equal to the preset temperature threshold, the engine 110 is considered to be in a warming-up stage, and step S102 is executed, and if the current temperature of the engine is not larger than the preset temperature threshold, the engine is considered to be in the warming-up stage and enters a driving stage, and step S108 is executed.
S102, when the engine 110 is in a warming-up stage, the rotating speed of the air-cooled radiator is controlled to be 0, and the opening of the thermostat is controlled to be 0.
S103, judging whether the following conditions are met: if the total power of the engine is greater than or equal to the preset power threshold, the engine 110 is considered to be in the high-power warming-up mode, and step S104 is executed, and if not, the engine 110 is considered to be in the low-power warming-up mode, and step S107 is executed.
S104, judging whether the following conditions are met: if the current vehicle speed is less than or equal to the preset vehicle speed threshold value, the engine 110 is considered to be in the high-power low-vehicle-speed warming mode, step S105 is executed, and if the current vehicle speed is not greater than the preset vehicle speed threshold value, the engine 110 is considered to be in the high-power high-vehicle-speed warming mode, and step S106 is executed.
And S105, when the engine 110 is in a high-power low-vehicle-speed warming-up mode, controlling the water pump to switch between a starting state and a stopping state periodically, wherein when the water pump is in the starting state, the rotating speed of the water pump is the safe rotating speed of the water pump. In some embodiments, after the water pump is in the starting state and the starting time is over, the water pump is controlled to be switched to the stalling state; after the water pump is in a stalling state and the stalling time is elapsed, controlling the water pump to be switched to a starting state; the starting time and the stalling time are preset fixed values.
And S106, when the engine 110 is in a high-power high-vehicle-speed warming mode, controlling the water pump to be in a starting state, wherein the rotating speed of the water pump is the safe rotating speed of the water pump.
And S107, when the engine 110 is in the low-power warm-up mode, controlling the water pump to be in a stop state.
S108, connecting with S101, when the engine 110 is in a driving stage, judging whether the following conditions are met: if the opening degree of the thermostat is greater than or equal to the preset opening degree threshold value, the engine 110 is considered to have a high heat dissipation requirement, and step S109 is executed, and if not, the heat dissipation requirement of the engine 110 is considered to be relatively low, and step S114 is executed.
And S109, when the engine 110 has a high heat dissipation requirement, inquiring the minimum oil consumption MAP of the engine according to the current rotating speed of the engine, the current torque of the engine and the ambient temperature, and determining the target temperature of the engine. 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 minimum fuel consumption state.
And S110, determining the heat productivity of the engine according to the current rotating speed and the current torque of the engine.
S111, determining total target heat dissipation according to the current temperature of the engine, the target temperature of the engine and the heat productivity of the engine
And S112, inquiring the MAP (maximum power consumption) of the thermal management system according to the input total target heat dissipation capacity, the air inlet speed of the air-cooled radiator and the ambient temperature, and determining the target rotating speed of the water pump and the target rotating speed of the air-cooled radiator. It can be considered that, when 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 under the current heat dissipation requirement and the current environment, the thermal management system 120 is in the lowest power consumption state.
And S113, controlling the rotating speed of the water pump to be the target rotating speed of the water pump, and controlling the rotating speed of the air-cooled radiator to be the target rotating speed of the air-cooled radiator.
And S114, connecting S108, and controlling the rotating speed of the water pump to be the safe rotating speed of the water pump and controlling the rotating speed of the air cooling radiator to be 0 when the heat dissipation requirement of the engine 110 is relatively low.
And S115, inquiring the MAP (maximum oil consumption) of the engine according to the current rotating speed of the engine, the current torque of the engine and the ambient temperature, and determining the target temperature of the engine.
And S116, determining the target opening of the thermostat according to the current temperature of the engine and the target temperature of the engine.
And S117, controlling the opening of the thermostat to be the target opening of the thermostat.
In the thermal management control method provided by the embodiment of the application, when the current temperature of the engine is less than or equal to the preset temperature threshold, the engine 110 may be considered to be in a warm-up state, and when the total power of the engine 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 and low-vehicle-speed state, at this time, the heat dissipation requirement of the engine 110 is not high, but there is a risk of local overheating, therefore, the water pump 121 is controlled to periodically switch between the start-up state and the stop-running state, thereby avoiding the local overheating of the engine 110, avoiding the overlong warm-up time of the engine 110 and the increase of the power consumption of the thermal management system 120 due to excessive heat dissipation, and ensuring the lowest power consumption of the thermal management system 120.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable storage medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable storage medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable storage medium may even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: 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 combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (12)

1. A thermal management control method for a vehicle including an engine and a thermal management system including a water pump, the engine and the water pump being connected to form a first cooling cycle, the thermal management control method comprising:
and when the current temperature of the engine is less than or equal to a preset temperature threshold value, the total power of the engine is greater than or equal to a preset power threshold value, and the current vehicle speed is less than or equal to a preset vehicle speed threshold value, controlling the water pump to be periodically switched between a starting state and a stopping state.
2. The thermal management control method according to claim 1, wherein the controlling the water pump to periodically switch between a start state and a stop state when the current temperature of the engine is less than or equal to a preset temperature threshold, the total power of the engine 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 comprises:
when the water pump is in a starting state, the rotating speed of the water pump is the safe rotating speed of the water pump.
3. The thermal management control method according to claim 1, wherein the controlling the water pump to periodically switch between a start state and a stop state when the current temperature of the engine is less than or equal to a preset temperature threshold, the total power of the engine 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 comprises:
after the water pump is in a starting state and starting time passes, controlling the water pump to be switched to a stalling state; after the water pump is in a stalling state and the stalling time passes, controlling the water pump to be switched to a starting state;
the starting time and the stalling time are preset fixed values, or the starting time is in positive correlation with the current vehicle speed, and the stalling time is in inverse correlation with the current vehicle speed.
4. The thermal management control method according to claim 1, wherein the thermal management system further comprises an air-cooled radiator and a thermostat, and the air-cooled radiator is connected with the engine and the water pump through the thermostat to form a second cooling cycle;
the thermal management control method further comprises the following steps: and when the current temperature of the engine is less than or equal to the preset temperature threshold value, controlling the rotating speed of the air-cooled radiator to be 0 and controlling the opening of the thermostat to be 0.
5. The thermal management control method according to claim 1,
and 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, controlling the water pump to stop rotating.
6. The thermal management control method according to claim 1,
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 speed of the engine is greater than the preset speed threshold, controlling the rotating speed of the water pump to be the safe rotating speed of the water pump; or
When the current temperature of the engine is less than or equal to the preset temperature threshold value, the total power of the engine is greater than or equal to the preset power threshold value, and the current speed of the vehicle is greater than the preset speed threshold value, the rotating speed of the water pump is controlled to be greater than the safe rotating speed of the water pump and to be positively correlated with the current speed of the vehicle.
7. The thermal management control method according to claim 1, wherein the thermal management system further comprises an air-cooled radiator and a thermostat, and the air-cooled radiator is connected with the engine and the water pump through the thermostat to form a second cooling cycle;
the thermal management control method further comprises the following steps:
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, inquiring the MAP (maximum oil consumption) of the engine according to the current rotating speed of the engine, the current torque of the engine and the current ambient temperature, and determining the total target heat dissipation amount;
inquiring the minimum power consumption MAP of a thermal management system according to the total target heat dissipation capacity, the air inlet speed of the air-cooled radiator and the current environment temperature, and determining the target rotating speed of a water pump and the target rotating speed of the air-cooled radiator;
and controlling the rotating speed of the water pump to be the target rotating speed of the water pump, and controlling the rotating speed of the air-cooled radiator to be the target rotating speed of the air-cooled radiator.
8. The thermal management control method according to claim 7, wherein when the current temperature of the engine is greater than or equal to a preset temperature threshold and the opening degree of the thermostat is greater than or equal to a preset opening degree threshold, querying a MAP of minimum oil consumption of the engine according to the current rotating speed of the engine, the current torque of the engine and the current ambient temperature, and determining the total target heat dissipation capacity of the engine comprises:
inquiring the MAP for the lowest oil consumption of the engine according to the current rotating speed of the engine, the current torque of the engine and the current environment temperature, and determining the target temperature of the engine;
determining the heat productivity of the engine according to the current rotating speed and the current torque of the engine;
and determining the total target heat dissipation amount according to the current temperature of the engine, the target temperature of the engine and the heat productivity of the engine.
9. The thermal management control method according to claim 1, wherein the thermal management system further comprises an air-cooled radiator and a thermostat, and the air-cooled radiator is connected with the engine and the water pump through the thermostat to form a second cooling cycle;
the thermal management control method further comprises the following steps:
when the current temperature of the engine is greater than or equal to the preset temperature threshold and the opening of the thermostat is smaller than a preset opening threshold, controlling the rotating speed of the water pump to be a water pump safe rotating speed and controlling the rotating speed of the air-cooled radiator to be 0;
inquiring MAP (maximum oil consumption) of the engine according to the current rotating speed, the current torque and the current environment temperature of the engine, and determining the target temperature of the engine;
determining the target opening degree of the thermostat according to the current temperature of the engine and the target temperature of the engine;
and controlling the opening degree of the thermostat to be the target opening degree of the thermostat.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program adapted to be executed by a processor to implement the thermal management control method of any of claims 1~9.
11. A thermal management control apparatus for a vehicle, characterized by comprising a processor and a memory, the processor and the memory being connected to each other;
the memory is for storing a computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the thermal management control method of any of claims 1~9.
12. A vehicle comprising an engine and a thermal management system comprising a water pump, an air-cooled radiator, a thermostat and the thermal management control apparatus of claim 11;
the engine and the water pump are connected to form a first cooling circulation, and the air cooling radiator is connected with the engine and the water pump through the thermostat to form a second cooling circulation.
CN202110458538.7A 2021-04-27 2021-04-27 Vehicle and thermal management control method, device and storage medium thereof Pending CN115247593A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CN202110458538.7A CN115247593A (en) 2021-04-27 2021-04-27 Vehicle and thermal management control method, device and storage medium thereof
MX2023011980A MX2023011980A (en) 2021-04-27 2022-04-22 Vehicle and thermal management control method and device therefor, and storage medium.
PCT/CN2022/088512 WO2022228310A1 (en) 2021-04-27 2022-04-22 Vehicle and thermal management control method and device therefor, and storage medium
JP2023560372A JP2024516088A (en) 2021-04-27 2022-04-22 Vehicle and thermal management control method, device, and storage medium
BR112023021664A BR112023021664A2 (en) 2021-04-27 2022-04-22 THERMAL MANAGEMENT CONTROL METHOD FOR A VEHICLE, COMPUTER READABLE STORAGE MEDIA, THERMAL MANAGEMENT CONTROL DEVICE FOR A VEHICLE, AND, VEHICLE
EP22794781.9A EP4296482A1 (en) 2021-04-27 2022-04-22 Vehicle and thermal management control method and device therefor, and storage medium
AU2022267591A AU2022267591A1 (en) 2021-04-27 2022-04-22 Vehicle and thermal management control method and device therefor, and storage medium
US18/373,221 US20240018895A1 (en) 2021-04-27 2023-09-26 Vehicle and thermal management control method and device therefor, and storage medium

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CN112060902B (en) * 2020-08-11 2022-06-17 长城汽车股份有限公司 Thermal management control method and device and automobile
CN115450745B (en) * 2022-06-01 2024-04-23 北京罗克维尔斯科技有限公司 Vehicle and control method, device, control equipment and medium for water temperature of engine of vehicle

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CN106246328B (en) * 2016-08-26 2018-12-07 广州汽车集团股份有限公司 A kind of control method and device of automobile engine water-cooling system electronic water pump
CN106870100B (en) * 2017-02-17 2019-07-23 广州汽车集团股份有限公司 A kind of control method and device of engine clutch type water pump
CN106979061B (en) * 2017-03-30 2019-11-05 广州汽车集团股份有限公司 A kind of electronic water pump for engine control method and system
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