CN113847136B - Control method of engine cooling system, vehicle and computer storage medium - Google Patents
Control method of engine cooling system, vehicle and computer storage medium Download PDFInfo
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- CN113847136B CN113847136B CN202111259265.XA CN202111259265A CN113847136B CN 113847136 B CN113847136 B CN 113847136B CN 202111259265 A CN202111259265 A CN 202111259265A CN 113847136 B CN113847136 B CN 113847136B
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- 238000001816 cooling Methods 0.000 title claims abstract description 175
- 238000000034 method Methods 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 265
- 230000001960 triggered effect Effects 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002826 coolant Substances 0.000 description 9
- 238000004891 communication Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000000737 periodic effect Effects 0.000 description 6
- 239000000110 cooling liquid Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Classifications
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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
- F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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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
- F01P2050/00—Applications
- F01P2050/22—Motor-cars
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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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)
Abstract
The invention discloses a control method of an engine cooling system, a vehicle and a computer storage medium, wherein the method comprises the following steps: when the engine is in a warm-up working condition, controlling a water pump of an engine cooling system to periodically operate; when the water pump operates periodically, acquiring the water temperature of an engine cooling system when the water pump operates; detecting whether the engine exits the warm-up working condition or not according to the water temperature; and when the engine is detected to exit the warm-up working condition, controlling the water pump to operate according to the target rotating speed corresponding to the water temperature. According to the invention, the water pump is periodically operated when the engine is warmed up, so that the water temperature distribution of the cooling system is more uniform, and the detected water temperature is more accurate compared with the water temperature detected when the water pump stops operating, thereby improving the cooling effect of the engine cooling system.
Description
Technical Field
The present invention relates to the field of engine technologies, and in particular, to a method for controlling an engine cooling system, a vehicle, and a computer storage medium.
Background
The engine cooling system has the function of timely dissipating part of heat absorbed by heated parts, and ensures that the engine works in the most suitable temperature state. The cooling system of the engine is forced circulation water cooling, namely the pressure of the cooling liquid is increased by a water pump, and the cooling liquid is forced to flow in the engine in a circulating mode.
In an engine cooling system, the rotation speed of a water pump is generally controlled according to the water temperature. When the water temperature is low, the rotating speed of the water pump is low, and even the operation is stopped. When the water pump stops running, the temperature value acquired by the temperature sensor is influenced by the installation position, so that the water temperature distribution of the whole engine cannot be correctly reflected, and the water temperature detection is inaccurate. If the detected water temperature is smaller, the water flow is smaller, and the engine is easy to generate hot spots to be damaged. If the detected water temperature is larger, the water flow is larger, and the power consumption of the cooling system is additionally increased.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a control method of an engine cooling system, a vehicle and a computer storage medium, and aims to enable water temperature detection to be more accurate by periodically operating a water pump.
To achieve the above object, the present invention provides a control method of an engine cooling system, including the steps of:
when the engine is in a warm-up working condition, controlling a water pump of an engine cooling system to periodically operate;
when the water pump operates periodically, acquiring the water temperature of an engine cooling system when the water pump operates;
detecting whether the engine exits the warm-up working condition or not according to the water temperature;
and when the engine is detected to exit the warm-up working condition, controlling the water pump to operate according to the target rotating speed corresponding to the water temperature.
Optionally, the step of detecting whether the engine is out of the warm-up condition according to the water temperature includes:
when the water temperature is higher than the preset temperature, judging that the engine is out of the warming-up working condition;
and when the water temperature is less than or equal to the preset temperature, judging that the engine does not exit the warm-up working condition.
Optionally, when the water pump is operated periodically, the step of obtaining the water temperature of the engine cooling system when the water pump is operated comprises:
when the water pump runs periodically, acquiring the average water temperature of an engine cooling system in a single running period of the water pump;
the average water temperature is used as the water temperature of the engine cooling system.
Optionally, the control method of the engine cooling system further comprises:
when the engine is started, acquiring the initial water temperature of an engine cooling system;
and when the initial water temperature is less than or equal to the preset temperature, determining that the engine is in a warm-up working condition.
Optionally, after the step of detecting whether the engine exits the warm-up condition according to the water temperature, the method further includes:
when the engine is detected not to exit the warm-up working condition, water flow corresponding to the water temperature is obtained;
when the water flow is less than or equal to the preset flow, returning to the step of controlling the water pump of the engine cooling system to periodically run;
and when the water flow is larger than the preset flow, controlling the water pump of the engine cooling system to periodically operate according to the target rotating speed corresponding to the water temperature, and returning to execute the step of acquiring the water temperature of the engine cooling system when the water pump periodically operates.
Optionally, the step of controlling the water pump of the engine cooling system to operate periodically when the engine is in the warm-up condition comprises:
when the engine is in a warm-up working condition, detecting whether each module of the vehicle has a heat exchange requirement or not, wherein the module of the vehicle comprises a passenger compartment, the engine and an exhaust gas recirculation system;
all modules of the vehicle do not have heat exchange requirements, and a water pump of an engine cooling system is controlled to run periodically.
Optionally, after the step of detecting whether a heat exchange demand exists in each module of the vehicle when the engine is in a warm-up condition, the method further includes:
when at least one module of the vehicle has a heat exchange requirement, adjusting a three-way valve of a cooling pipeline where the water pump is located to enable the cooling pipeline where the water pump is located to be communicated with the module with the heat exchange requirement to form a cooling loop;
and controlling the water pump to operate according to the target rotating speed corresponding to the water temperature of the engine cooling system.
Optionally, the step of detecting whether heat exchange requirements exist in each module of the vehicle includes at least one of:
detecting whether a heating request of the passenger compartment is triggered or not so as to judge whether the heat exchange requirement exists in the passenger compartment or not;
detecting whether a minimum water flow request of an engine cooling system is triggered or not so as to judge whether the engine has a heat exchange requirement or not;
whether the cooling requirement of the exhaust gas recirculation system is triggered or not is detected so as to judge whether the exhaust gas recirculation system has a heat exchange requirement or not.
Further, to achieve the above object, the present invention also provides a vehicle comprising: a memory, a processor and a control program for an engine cooling system stored on the memory and operable on the processor, the control program for an engine cooling system when executed by the processor implementing the steps of the method for controlling an engine cooling system as set forth in any one of the preceding claims.
Further, to achieve the above object, the present invention also provides a computer storage medium having stored thereon a control program of an engine cooling system, the control program of the engine cooling system, when executed by a processor, implementing the steps of the control method of the engine cooling system as set forth in any one of the above.
According to the control method of the engine cooling system, the vehicle and the computer storage medium provided by the embodiment of the invention, when the engine is in a warm-up working condition, the water pump of the engine cooling system is controlled to periodically operate; when the water pump periodically runs, acquiring the water temperature of an engine cooling system when the water pump runs; detecting whether the engine exits the warm-up working condition or not according to the water temperature; and when the engine is detected to exit the warm-up working condition, controlling the water pump to operate according to the target rotating speed corresponding to the water temperature. According to the invention, the water pump is periodically operated when the engine is warmed up, so that the water temperature distribution of the cooling system is more uniform, and the water temperature detected when the water pump stops operating is more accurate, thereby improving the cooling effect of the engine cooling system.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram illustrating an embodiment of a method of controlling an engine cooling system according to the present invention;
FIG. 3 is a schematic diagram of the periodic control of the water pump according to the present invention;
FIG. 4 is a schematic flow chart diagram illustrating another embodiment of a method for controlling an engine cooling system according to the present invention;
FIG. 5 is a schematic flow chart illustrating a method of controlling an engine cooling system according to yet another embodiment of the present invention;
FIG. 6 is a first schematic illustration of a cooling circuit of the engine cooling system of the present invention;
FIG. 7 is a second schematic illustration of the cooling circuit of the engine cooling system of the present invention;
FIG. 8 is a third schematic view of the cooling circuit of the engine cooling system of the present invention;
FIG. 9 is a fourth schematic illustration of the cooling circuit of the engine cooling system of the present invention;
FIG. 10 is a fifth schematic illustration of the cooling circuit of the engine cooling system of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a solution, when an engine is warmed up, a water pump is periodically operated, so that the water temperature distribution of a cooling system is more uniform, and compared with the water temperature detected when the water pump stops operating, the water temperature is more accurate, so that the cooling effect of the engine cooling system is improved.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal in the embodiment of the present invention is a Control device in a vehicle, for example, a vehicle Control Unit (ECU) and an Electronic Control Unit (ECU) on the vehicle.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, MCU, DSP, network interface 1004, user interface 1003, memory 1005, communication bus 1002. The communication bus 1002 is used to implement connection communication among these components. The user interface 1003 may comprise a Display screen (Display), an input unit such as keys, and the optional user interface 1003 may also comprise a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is one type of computer storage medium, may include control programs operating the network communication module, the user interface module, and the engine cooling system.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and processor 1001 may be configured to invoke a control program for the engine cooling system stored in memory 1005 and perform the following operations:
when the engine is in a warm-up working condition, controlling a water pump of an engine cooling system to periodically operate;
when the water pump operates periodically, acquiring the water temperature of an engine cooling system when the water pump operates;
detecting whether the engine exits the warm-up working condition or not according to the water temperature;
and when the engine is detected to exit the warm-up working condition, controlling the water pump to operate according to the target rotating speed corresponding to the water temperature.
Further, processor 1001 may invoke a control program of the engine cooling system stored in memory 1005, and also perform the following operations:
when the water temperature is higher than the preset temperature, judging that the engine is out of the warming-up working condition;
and when the water temperature is less than or equal to the preset temperature, judging that the engine does not exit the warm-up working condition.
Further, processor 1001 may invoke a control program of the engine cooling system stored in memory 1005, and also perform the following operations:
when the water pump runs periodically, acquiring the average water temperature of an engine cooling system in a single running period of the water pump;
and taking the average water temperature as the water temperature of the engine cooling system.
Further, the processor 1001 may call a control program of the engine cooling system stored in the memory 1005, and also perform the following operations:
when the engine is started, acquiring the initial water temperature of an engine cooling system;
and when the initial water temperature is less than or equal to the preset temperature, determining that the engine is in a warming working condition.
Further, processor 1001 may invoke a control program of the engine cooling system stored in memory 1005, and also perform the following operations:
when the engine is detected not to exit the warm-up working condition, water flow corresponding to the water temperature is obtained;
when the water flow is less than or equal to the preset flow, returning to the step of controlling the water pump of the engine cooling system to periodically run;
and when the water flow is larger than the preset flow, controlling the water pump of the engine cooling system to periodically operate according to the target rotating speed corresponding to the water temperature, and returning to execute the step of acquiring the water temperature of the engine cooling system when the water pump is operated periodically.
Further, the processor 1001 may call a control program of the engine cooling system stored in the memory 1005, and also perform the following operations:
when the engine is in a warm-up working condition, detecting whether each module of the vehicle has a heat exchange requirement or not, wherein the module of the vehicle comprises a passenger compartment, the engine and an exhaust gas recirculation system;
all modules of the vehicle do not have heat exchange requirements, and a water pump of an engine cooling system is controlled to run periodically.
Further, processor 1001 may invoke a control program of the engine cooling system stored in memory 1005, and also perform the following operations:
when at least one module of the vehicle has a heat exchange requirement, adjusting a three-way valve of a cooling pipeline where the water pump is positioned so as to communicate the cooling pipeline where the water pump is positioned with the module having the heat exchange requirement to form a cooling loop;
and controlling the water pump to operate according to the target rotating speed corresponding to the water temperature of the engine cooling system.
Further, processor 1001 may invoke a control program of the engine cooling system stored in memory 1005, and also perform the following operations:
detecting whether a heating request of a passenger compartment is triggered or not so as to judge whether a heat exchange requirement exists in the passenger compartment or not;
detecting whether a minimum water flow request of an engine cooling system is triggered or not so as to judge whether the engine has a heat exchange requirement or not;
whether the cooling requirement of the exhaust gas recirculation system is triggered or not is detected so as to judge whether the exhaust gas recirculation system has a heat exchange requirement or not.
Referring to fig. 2, in one embodiment, a method of controlling an engine cooling system includes the steps of:
step S10, when the engine is in a warm-up working condition, controlling a water pump of an engine cooling system to periodically operate;
in the present embodiment, the engine cooling system is mainly composed of a water pump, a radiator, a cooling fan, a compensating water tank, a thermostat, an EGR cooler, a passenger compartment radiator, a cooling water jacket in an engine block and a cylinder head, and accessories. On a high-voltage plug-in hybrid electric vehicle, a high-voltage PTC heater is added in an engine cooling loop, and the high-voltage PTC heater is used for heating coolant to heat a passenger compartment at a low temperature.
The water pump of the engine cooling system is controlled to run periodically, namely the water pump is controlled to be opened and closed periodically, for example, the water pump is controlled to run for a second preset time period at intervals of a first preset time period. Through the periodic operation of water pump for the inside coolant liquid periodic flow of engine cooling system gets up, and coolant liquid is through mixing in the water jacket, can make water temperature sensor gather more accurate temperature numerical value, avoids engine cylinder body to produce the hot spot under the warm-up operating mode simultaneously, still can reduce the requirement to water temperature sensor mounted position. For example, as shown in FIG. 3, by calibrating T off And T on Time period at T on Starting the water pump in time period T off And the water pump is turned off in a time period, so that accurate water temperature is obtained.
Alternatively, the warm-up condition is an operating state in which the temperature of the engine water is lower than a preset temperature, wherein the preset temperature may be 80 ℃. When the engine is started, the initial water temperature of the engine cooling system is obtained, when the initial water temperature is smaller than or equal to the preset temperature, the engine is judged to enter a warming working condition, and step S10 is executed.
Step S20, when the water pump operates periodically, acquiring the water temperature of an engine cooling system when the water pump operates;
in this embodiment, the water pump operation stage is T in fig. 3 on Time period, obtaining T on The temperature of the water in the engine cooling system during the time period is more accurate as the coolant inside the engine cooling system is flowing at this time.
Alternatively, when the water pump is operated periodically, the average water temperature of the engine cooling system in a single operation period of the water pump is obtained, and the average water temperature is taken as the water temperature of the engine cooling system, namely T is obtained on All water temperature values detected in the time period are averaged to be used as the water temperature of the engine cooling system, so that the detection is carried outThe water temperature is more accurate. Wherein the average water temperature is at a single T on And in the time period, performing mobile calculation on the water temperature value read by the water temperature sensor in the time sequence to obtain the average water temperature.
Step S30, detecting whether the engine exits the warm-up working condition or not according to the water temperature;
in the embodiment, after the more accurate water temperature is obtained, whether the engine exits the warm-up working condition or not can be detected more accurately according to the water temperature. Specifically, when the water temperature is higher than the preset temperature, the engine is judged to exit the warming working condition, and when the water temperature is lower than or equal to the preset temperature, the engine is judged not to exit the warming working condition, namely, the engine is still in the warming working condition.
Alternatively, step S10 may be performed back while the engine is still in the warmed-up condition.
And S40, when the engine is detected to exit the warm-up working condition, controlling the water pump to operate according to the target rotating speed corresponding to the water temperature.
In this embodiment, when it is detected that the engine exits the warm-up condition, it indicates that the engine enters the normal operating state, and at this time, the water pump may be controlled to operate according to the target rotation speed corresponding to the water temperature, so as to cool and dissipate heat of the engine.
Optionally, when the target rotation speed corresponding to the water temperature is calculated, the cooling power of the engine may be calculated, the water flow rate required by the engine may be calculated according to the water temperature, the preset target water temperature of the engine, and the cooling power, and then the coolant flow rate may be converted into the corresponding water pump rotation speed value, that is, the target rotation speed. For example, in a previous test, the thermal power transmitted to the cooling liquid by the engine under different rotational speed loads is actually measured, so that the corresponding relation between the rotational speed of the engine and the thermal power is obtained, and the thermal power corresponding to the current rotational speed of the engine is the cooling power of the engine. The heat dissipation power when the water temperature is reduced to a preset target water temperature of the engine when the water flow is specified can be calculated according to a thermodynamic formula, so that the water flow when the heat dissipation power is matched with the cooling power of the engine, namely the water flow required by the engine, can be determined.
In the technical scheme disclosed in this embodiment, through when the engine warmup, the water pump of periodic operation to make cooling system's water temperature distribution more even, compare the water temperature that detects when the water pump shut down more accurate, thereby improve engine cooling system's cooling effect.
In another embodiment, as shown in fig. 3, on the basis of the embodiment shown in fig. 2, after step S30, the method further includes:
s50, when the engine is detected not to exit the warm-up working condition, water flow corresponding to the water temperature is obtained;
in this embodiment, when it is detected that the engine does not exit the warm-up condition, the rotation speed of the water pump can be periodically controlled according to the detected more accurate water temperature, so that more accurate flow regulation is realized. Specifically, the cooling power of the engine can be calculated, the water flow required by the engine can be calculated according to the water temperature, the preset target water temperature of the engine and the cooling power, and how to periodically control the rotating speed of the water pump can be judged according to the water flow.
Step S60, when the water flow is less than or equal to the preset flow, returning to the step of controlling the water pump of the engine cooling system to periodically operate;
in this embodiment, when the water flow is less than or equal to the preset flow, it indicates that the water flow is small, and the water pump may have an excessively low rotation speed or stop operating, so that the step of controlling the water pump of the engine cooling system to periodically operate may be performed to continue to periodically control the water pump. Alternatively, the preset flow rate may be zero, i.e. when there is no flow demand, returning to the step of performing the periodic operation of the water pump controlling the engine cooling system.
And S70, when the water flow is larger than the preset flow, controlling the water pump of the engine cooling system to periodically operate according to the target rotating speed corresponding to the water temperature, and returning to execute the step of acquiring the water temperature of the engine cooling system when the water pump is periodically operated.
In this embodiment, when the water flow is greater than the preset flow, the water pump of the engine cooling system may be controlled to periodically operate according to the target rotation speed corresponding to the water temperature, so as to prevent the engine cylinder from being damaged due to hot spots in the warm-up stage. Alternatively, the preset flow rate may be zero, i.e. when there is a flow demand, i.e. the water pump of the engine cooling system is controlled to run periodically at a target speed corresponding to the water temperature.
In the technical scheme disclosed in this embodiment, when detecting that the engine does not exit the warm-up working condition, the rotating speed of the water pump during periodic operation is correspondingly controlled according to the water flow corresponding to the water temperature so as to meet the heat dissipation requirement of the engine in the warm-up stage.
In another embodiment, as shown in fig. 4, on the basis of the embodiment shown in any one of fig. 2 to 3, the step S10 includes:
s11, when the engine is in a warming working condition, detecting whether heat exchange requirements exist in all modules of the vehicle or not, wherein the modules of the vehicle comprise a passenger compartment, the engine and an exhaust gas recirculation system;
and S12, each module of the vehicle does not have a heat exchange requirement, and a water pump of an engine cooling system is controlled to periodically operate.
In the present embodiment, as shown in fig. 6, the general schematic diagram of the cooling circuit when the Engine cooling system can communicate with the heat exchange pipeline of each module of the vehicle realizes the thermal management of the vehicle, in the figure, coolant Sensor represents a Coolant temperature Sensor, TANK represents a cooling water TANK, TC represents a turbocharger (Turbo Charge), EOC represents an Engine oil cooler (Engine oil cooler), cylinder Head represents a Cylinder Head, cylinder Block represents a Cylinder Block, EGR represents an exhaust gas recirculation system, FSV represents a throttle valve, HT Rad represents a high temperature Radiator (HT Radiator), and HVCH represents a high pressure heater. Therefore, when the engine is in a warm-up working condition, whether heat exchange requirements exist in all modules of the vehicle can be detected. If the water temperature detection device does not exist, the fact that the vehicle does not have the coolant flow requirement is shown, the water pump can stop running to cause inaccurate water temperature detection, and therefore the water pump of the engine cooling system can be controlled to run periodically, and water temperature detection is more accurate. The sources of the coolant flow demand include an Engine block, an Engine head, engine oil, low pressure exhaust gas recirculation (LP-EGR), a Cabin Heater, a high temperature Radiator (HT Radiator), and a Turbo charger. The three-way valve (HTV) has two states of 1 inlet and 3 outlet (1 in3 out) and 2 inlet and 3 outlet (2 in3 out), and the pressure valve (Bypass) has two states of opening (on) and closing (off), so that the three-way valve and the pressure valve are matched in 4 states in the warming-up process: (1) HTV 1in3out AND Bypass off; (2) HTV 1in3out AND Bypass on; (3) HTV 2in3out AND Bypass off; AND (4) the HTV 2in3out AND Bypass on.
Optionally, when at least one module of the vehicle has a heat exchange demand, the three-way valve of the cooling pipeline where the water pump is located can be adjusted so that the cooling pipeline where the water pump is located is communicated with the module where the heat exchange demand exists, a cooling loop is formed, and the water pump is controlled to operate according to a target rotating speed corresponding to the water temperature of the engine cooling system so as to meet the heat exchange demand of the module where the heat exchange demand exists. It should be noted that the cooling pipeline where the water pump is located is communicated with the module with the heat exchange requirement and is not communicated with the module without the heat exchange requirement, so that the heat exchange effect of the cooling system is better, and unnecessary energy consumption can be reduced. For example, fig. 7 shows a circuit with HVCH heating only, with the three-way valve and the pressure valve in the states: when the HTV 1in3out AND Bypass is off, the flow of the loop is less than 18L/min, the pressure valve is ensured not to be flushed, AND when only the passenger compartment has a heat exchange requirement, the water pump is communicated with a passenger compartment Heater (Cabin Heater) through a three-way valve to form a cooling loop. For another example, fig. 8 shows a circuit in which HVCH is heated and any of the following conditions is satisfied: (1) the flow requested by the passenger compartment heater is more than 18L/min; (2) The engine requests a minimum flow, at which time the states of the three-way valve and the pressure valve are: the HTV 1in3out AND Bypass on, the flow of the loop should be greater than 18L/min at the moment, the pressure valve can be guaranteed to be flushed, AND when a passenger compartment AND an engine have heat exchange requirements, the water pump is communicated with a passenger compartment Heater (Cabin Heater) AND Cylinder heads AND Cylinder blocks (Cylinder Head AND Cylinder Block) through a three-way valve to form a cooling loop. For another example, in fig. 9, the states of the three-way valve and the pressure valve are: HTV 2in3out AND Bypass off, AND the demanded flow is less than 18L/min, in FIG. 10, the states of the three-way valve AND the pressure valve are: the HTV 2in3out AND Bypass on has a required flow rate larger than 18L/min, when an Exhaust Gas Recirculation system (EGR) has a heat exchange requirement, if the flow rate required by the Exhaust Gas Recirculation system is smaller than a flow threshold value (for example, 18L/min), a Bypass pressure valve is not flushed, a water pump is communicated with the Exhaust Gas Recirculation system (EGR) through a three-way valve to form a cooling loop (if the flow rate required by the Exhaust Gas Recirculation system is larger than the flow threshold value (for example, 18L/min), the Bypass pressure valve is flushed, AND the water pump is communicated with the Exhaust Gas Recirculation system (EGR) through the three-way valve to form the cooling loop).
Optionally, when detecting whether heat exchange needs exist in each module of the vehicle, at least one step of: detecting whether a heating request of the passenger compartment is triggered or not so as to judge whether the heat exchange requirement exists in the passenger compartment or not; detecting whether a minimum water flow request of an engine cooling system is triggered or not so as to judge whether the engine has a heat exchange requirement or not; whether the cooling requirement of the exhaust gas recirculation system is triggered or not is detected so as to judge whether the exhaust gas recirculation system has a heat exchange requirement or not.
In the technical scheme disclosed in the embodiment, the combination of the cooling loops of the engine cooling system is optimized, so that the energy consumption is reduced, and the thermal management efficiency of the vehicle is improved.
In addition, an embodiment of the present invention also provides a vehicle, including: the control method comprises the steps of the control method of the engine cooling system according to each embodiment, wherein the steps are realized when the control program of the engine cooling system is executed by the processor.
Furthermore, an embodiment of the present invention also provides a computer storage medium having a control program of an engine cooling system stored thereon, where the control program of the engine cooling system, when executed by a processor, implements the steps of the control method of the engine cooling system according to the above embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (10)
1. A control method of an engine cooling system, characterized by comprising the steps of:
when the engine is in a warm-up working condition, controlling a water pump of an engine cooling system to periodically operate;
when the water pump operates periodically, acquiring the water temperature of an engine cooling system when the water pump operates;
detecting whether the engine exits the warm-up working condition or not according to the water temperature;
when the engine is detected to exit the warm-up working condition, controlling the water pump to operate according to the target rotating speed corresponding to the water temperature;
when detecting that the engine exits the warm-up working condition, the method controls the water pump to operate according to the target rotating speed corresponding to the water temperature, and comprises the following steps:
when the condition that the engine exits the warm-up working condition is detected, determining cooling power according to the current rotating speed of the engine;
determining the required water flow of the engine according to the water temperature, the cooling power and the target water temperature of the engine, and determining the target rotating speed according to the required water flow;
controlling the water pump to operate according to the target rotating speed;
when the water pump is operated periodically, the water temperature of the engine cooling system when the water pump is operated is obtained, and the method comprises the following steps:
when the water pump periodically operates, the average water temperature of the engine cooling system when the water pump operates is obtained, and the average water temperature is used as the water temperature of the engine cooling system.
2. The method of controlling an engine cooling system according to claim 1, wherein the step of detecting whether the engine exits the warm-up condition based on the water temperature includes:
when the water temperature is higher than the preset temperature, judging that the engine is out of the warming-up working condition;
and when the water temperature is less than or equal to the preset temperature, judging that the engine does not exit the warm-up working condition.
3. The control method of the engine cooling system according to claim 1, wherein the step of acquiring the water temperature of the engine cooling system while the water pump is operating periodically comprises:
when the water pump runs periodically, acquiring the average water temperature of an engine cooling system in a single running period of the water pump;
the average water temperature is used as the water temperature of the engine cooling system.
4. The control method of an engine cooling system according to claim 1, characterized in that the control method of an engine cooling system further comprises:
when the engine is started, acquiring the initial water temperature of an engine cooling system;
and when the initial water temperature is less than or equal to the preset temperature, determining that the engine is in a warming working condition.
5. The method for controlling an engine cooling system according to claim 1, wherein the step of detecting whether the engine exits the warm-up condition based on the water temperature is followed by the step of:
when the engine is detected not to exit the warm-up working condition, water flow corresponding to the water temperature is obtained;
when the water flow is less than or equal to the preset flow, returning to the step of controlling the water pump of the engine cooling system to periodically run;
and when the water flow is larger than the preset flow, controlling the water pump of the engine cooling system to periodically operate according to the target rotating speed corresponding to the water temperature, and returning to execute the step of acquiring the water temperature of the engine cooling system when the water pump is operated periodically.
6. The method of controlling an engine cooling system according to claim 1, wherein the step of controlling a water pump of the engine cooling system to operate periodically while the engine is in a warm-up condition comprises:
when the engine is in a warm-up working condition, detecting whether each module of the vehicle has a heat exchange requirement or not, wherein the module of the vehicle comprises a passenger compartment, the engine and an exhaust gas recirculation system;
all modules of the vehicle do not have heat exchange requirements, and a water pump of an engine cooling system is controlled to run periodically.
7. The method for controlling the cooling system of the engine as claimed in claim 6, wherein after the step of detecting whether the heat exchange requirement exists among the modules of the vehicle when the engine is in the warm-up condition, the method further comprises the following steps:
when at least one module of the vehicle has a heat exchange requirement, adjusting a three-way valve of a cooling pipeline where the water pump is located to enable the cooling pipeline where the water pump is located to be communicated with the module with the heat exchange requirement to form a cooling loop;
and controlling the water pump to operate according to the target rotating speed corresponding to the water temperature of the engine cooling system.
8. The method of controlling an engine cooling system according to claim 6, wherein the step of detecting whether a heat exchange demand exists in each module of the vehicle includes at least one of:
detecting whether a heating request of a passenger compartment is triggered or not so as to judge whether a heat exchange requirement exists in the passenger compartment or not;
detecting whether a minimum water flow request of an engine cooling system is triggered or not so as to judge whether the engine has a heat exchange requirement or not;
whether the cooling requirement of the exhaust gas recirculation system is triggered or not is detected so as to judge whether the exhaust gas recirculation system has a heat exchange requirement or not.
9. A vehicle, characterized in that the vehicle comprises: memory, a processor and a control program of an engine cooling system stored on the memory and executable on the processor, the control program of the engine cooling system, when executed by the processor, implementing the steps of the control method of the engine cooling system according to any one of claims 1 to 8.
10. A computer storage medium, characterized in that a control program of an engine cooling system is stored thereon, which when executed by a processor implements the steps of the control method of the engine cooling system according to any one of claims 1 to 8.
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| CN114876624B (en) * | 2022-05-16 | 2023-07-18 | 浙江吉利控股集团有限公司 | Range extender cooling control method, system, equipment and storage medium |
| CN117349952A (en) * | 2022-06-23 | 2024-01-05 | 北京罗克维尔斯科技有限公司 | Thermal management system modeling method, device, equipment, medium and vehicle |
| CN115750064A (en) * | 2022-11-23 | 2023-03-07 | 长城汽车股份有限公司 | Water pump control method and device, terminal equipment and storage medium |
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| CN109386369A (en) * | 2017-08-08 | 2019-02-26 | 丰田自动车株式会社 | The cooling device of vehicle and the control method of vehicle |
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| CN102180256A (en) * | 2010-12-30 | 2011-09-14 | 上海佳豪船舶工程设计股份有限公司 | Automatic temperature-control variable flow type central cooling system for ship |
| CN112378043B (en) * | 2020-11-12 | 2022-09-27 | 平安科技（深圳）有限公司 | Cooling water system control method, equipment, device and storage medium |
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| CN106979061A (en) * | 2017-03-30 | 2017-07-25 | 广州汽车集团股份有限公司 | A kind of electronic water pump for engine control method and system |
| CN109386369A (en) * | 2017-08-08 | 2019-02-26 | 丰田自动车株式会社 | The cooling device of vehicle and the control method of vehicle |
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