Engine cooling system, control method, controller, automobile and storage medium

Abstract

The invention discloses an engine cooling system, a control method, a controller, an automobile and a storage medium. The system comprises a cylinder body, a cylinder cover, a water pump, a warm air branch and a temperature control branch. The cylinder body is matched with the cylinder cover to form a cylinder circulation branch; the warm air branch is arranged between a first outlet of the cylinder cover and an inlet of the water pump and comprises a switch valve and a warm air core body which are arranged in series; the temperature control branch comprises a thermostat, an inlet of the thermostat is connected with a first outlet of the cylinder body, and an outlet of the thermostat is connected with an inlet of the water pump; and the outlet of the water pump is connected with the first inlet of the cylinder body. The series cooling effect is achieved through the air cylinder circulation branch, the split-flow cooling effect is achieved through the temperature control branch and the warm air branch, compatibility of series cooling and parallel cooling can be achieved, and the cooling effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an engine cooling system, a control method, a controller, a vehicle and a storage medium. Background Art

[0002] The engine cooling system currently on the market generally includes the following two designs: The first is a cylinder block and cylinder head series design, which is mainly used in conventional and traditional models. Its main feature is that the flow pumped out by the water pump flows through the cylinder block and the cylinder head, that is, the total flow of the water pump is equal to the flow of the cylinder block and the flow of the cylinder head. The total flow of the water pump is small, and the coolant needs to absorb the heat of the cylinder block and the heat of the cylinder head at the same time, which leads to a large temperature rise and a large system pressure loss. The second is a cylinder block and cylinder head diversion design, which is mainly characterized by that part of the flow pumped out by the water pump enters the cylinder block and part enters the cylinder head. The water pump flow is the sum of the flow of the cylinder block and the flow of the cylinder head. The coolant only absorbs the heat of the cylinder block or the heat of the cylinder head, which leads to a small temperature rise and a small system pressure loss, but the total flow of the water pump is large. The diversion design is mainly to be able to control the cylinder block and the cylinder head at the same time, realize differentiated management, keep the cylinder block warm, increase the oil temperature, and ensure that the cylinder head temperature is low and the combustion chamber does not vibrate. Summary of the invention

[0003] The embodiments of the present invention provide an engine cooling system, a control method, a controller, a vehicle and a storage medium to solve the problem that the existing engine cooling system is incompatible with the cylinder block and cylinder head series design and the split flow design.

[0004] An engine cooling system includes a cylinder block, a cylinder head, a water pump, a warm air branch and a temperature control branch;

[0005] The cylinder body and the cylinder head cooperate to form a cylinder circulation branch;

[0006] The warm air branch is arranged between the first outlet of the cylinder cover and the inlet of the water pump, and comprises a switch valve and a warm air core body arranged in series;

[0007] The temperature control branch includes a thermostat, the inlet of the thermostat is connected to the first outlet of the cylinder, and the outlet of the thermostat is connected to the inlet of the water pump;

[0008] The outlet of the water pump is connected to the first inlet of the cylinder body.

[0009] A controller comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned engine cooling system control method when executing the computer program.

[0010] A car comprises the above engine cooling system, or comprises the above controller.

[0011] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the engine cooling system control method is implemented.

[0012] The above-mentioned engine cooling system, control method, controller, automobile and storage medium form a cylinder circulation branch between the cylinder block and the cylinder head, which can absorb the heat of the cylinder block and the cylinder head at the same time to ensure the series cooling effect of the cylinder block and the cylinder head; the warm air branch is arranged between the first outlet of the cylinder head and the inlet of the water pump, and the opening of the switch valve and the speed of the water pump can be adjusted to ensure the shunt cooling effect of the warm air branch on the cylinder head; the temperature control branch is arranged between the first outlet of the cylinder block and the inlet of the water pump, and the thermostat can adaptively adjust the opening of the thermostat according to the temperature sensed by the temperature sensing component based on the built-in temperature sensing component to ensure the shunt cooling effect of the temperature control branch on the cylinder block; moreover, the warm air branch and the temperature control branch are connected in parallel to the inlet of the water pump, and then flow back to the cylinder block through the water pump, so that the coolant in the warm air branch and the temperature control branch does not affect each other, which helps to ensure their cooling effect. The heater core serves as a cooling element for auxiliary transition and can achieve two-speed cooling performance, creating a difference in the diversion cooling between the cylinder block and the cylinder head. On the premise of ensuring that the cylinder head does not overheat and the combustion chamber does not detonate, it delays the opening time of the thermostat, further increases the temperature of the engine oil and reduces friction.

[0013] When the measured data collected in the current mode meets the preset switching conditions, the switchable mode corresponding to the preset switching conditions is determined as the target mode, and then the target opening and target speed corresponding to the target mode are determined; the switch valve in the warm air branch is controlled to work based on the target opening to meet the need for heat dissipation of the cylinder head through the warm air branch; the thermostat is adaptively adjusted to switch into different states according to the temperature detected by the built-in temperature sensing component to meet the need for heat dissipation of the cylinder body by the temperature control branch; finally, the water pump is controlled to work based on the target speed, so that both the warm air branch and the temperature control branch return to the cylinder body through the water pump to meet the different opening requirements of the water pump under the target mode, so as to ensure the cooling effect of the engine cooling system under the target mode. The thermostat autonomously adjusts the state according to the temperature detected by the temperature sensing component, and the controller can determine the target mode to be switched to based on the measured data, and then control the switch valve and the water pump to work separately according to the target opening and target speed corresponding to each target mode, so that there is no mutual interference between different target modes, and multiple target modes can be compatible with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0015] Figure 1 is a schematic diagram of an engine cooling system in one embodiment of the present invention;

[0016] Figure 2 is a flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0017] Figure 3 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0018] Figure 4 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0019] Figure 5 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0020] Figure 6 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0021] Figure 7 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0022] Figure 8 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0023] Fig. 9 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0024] Fig.10 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0025] Fig.11 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0026] Fig.12 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0027] Fig.13 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0028] Fig.14 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0029] Fig.15 is another flow chart of an engine cooling system control method according to an embodiment of the present invention;

[0030] Fig.16 is another flow chart of an engine cooling system control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] An engine cooling system according to an embodiment of the present invention is as follows: Figure 1 As shown, the engine cooling system includes a cylinder block, a cylinder head, a water pump, a warm air branch and a temperature control branch; the cylinder block and the cylinder head cooperate to form a cylinder circulation branch; the warm air branch is arranged between the first outlet of the cylinder head and the inlet of the water pump, and includes a switch valve and a warm air core arranged in series; the temperature control branch includes a thermostat, the inlet of the thermostat is connected to the first outlet of the cylinder block, and the outlet of the thermostat is connected to the inlet of the water pump; the outlet of the water pump is connected to the first inlet of the cylinder block.

[0033] Among them, the cylinder circulation branch is a branch for realizing the flow of cooling flow between the cylinder block and the cylinder head, that is, the coolant in the cylinder block flows to the cylinder head, and then flows back from the cylinder head to the cylinder block, so that the coolant flows between the cylinder block and the cylinder head, so that the coolant can absorb the heat of the cylinder block and the cylinder head. In this example, when the bypass valve of the warm air branch is closed and the temperature control branch is not working (that is, the thermostat is not started), the coolant only flows in the cylinder circulation branch formed between the cylinder block and the cylinder head, which can absorb the heat of the cylinder block and the cylinder head at the same time, ensuring the series cooling effect of the cylinder block and cylinder head.

[0034] As an example, the warm air branch is arranged between the first outlet of the cylinder head and the inlet of the water pump, including a switch valve and a warm air core arranged in series, and the controller is connected to the switch valve, which can control the switch valve to work based on the target opening, so that the coolant output from the cylinder head can flow back into the cylinder body through the warm air core-water pump, so that the warm air core can achieve a warm air effect. In this example, the warm air branch is independently controlled by the controller, which can avoid the heat flow of the warm air branch affecting the refrigeration pipeline through radiation or convection and affecting the maximum refrigeration effect when high-power cooling of the air conditioner is required.

[0035] As an example, the temperature control branch is a branch for achieving temperature control. The temperature control branch includes a thermostat. The inlet of the thermostat is connected to the first outlet of the cylinder body. The first outlet of the thermostat is directly connected to the inlet of the water pump. The state of the thermostat can be adjusted autonomously according to actual conditions. Among them, the thermostat is a valve that controls the flow path of the coolant. It is an automatic temperature control device, usually containing a temperature sensing component, which opens and closes the flow of air, gas or liquid by thermal expansion or contraction. The thermostat automatically adjusts the amount of water entering the radiator according to the temperature of the cooling water, changes the circulation range of the water, and adjusts the heat dissipation capacity of the cooling system to ensure that the engine operates within a suitable temperature range.

[0036] The water pump is a device that transports liquid or pressurizes liquid, and provides power for the flow of coolant. As an example, the inlet of the water pump is connected to the warm air branch, and can receive the coolant output by the cylinder head and flowing through the warm air branch; it is also connected to the temperature control module, and can receive the coolant output by the cylinder body and flowing through the temperature control branch; the outlet of the water pump is connected to the first inlet of the cylinder body, so that the water pump can output the coolant output by the warm air branch and / or the temperature control branch to the cylinder body, so that the coolant entering the cylinder body can flow in the cylinder circulation branch to ensure the cooling effect.

[0037] In this embodiment, a cylinder circulation branch is formed between the cylinder block and the cylinder head, which can absorb the heat of the cylinder block and the cylinder head at the same time, thereby ensuring the series cooling effect of the cylinder block and the cylinder head; the warm air branch is arranged between the first outlet of the cylinder head and the inlet of the water pump, and the opening of the switch valve and the rotation speed of the water pump can be adjusted to ensure the shunt cooling effect of the warm air branch on the cylinder head; the temperature control branch is arranged between the first outlet of the cylinder block and the inlet of the water pump, and the thermostat can adaptively adjust the opening of the thermostat according to the temperature sensed by the temperature sensing component based on the built-in temperature sensing component, thereby ensuring the shunt cooling effect of the temperature control branch on the cylinder block; moreover, the warm air branch and the temperature control branch are connected in parallel to the inlet of the water pump, and then flow back to the cylinder block through the water pump, so that the coolant in the warm air branch and the temperature control branch do not affect each other, which helps to ensure their cooling effect. The heater core serves as a cooling element for auxiliary transition and can achieve two-speed cooling performance, creating a difference in the diversion cooling between the cylinder block and the cylinder head. On the premise of ensuring that the cylinder head does not overheat and the combustion chamber does not detonate, it delays the opening time of the thermostat, further increases the temperature of the engine oil and reduces friction.

[0038] In one embodiment, the temperature control branch further includes a radiator, one end of the radiator is connected to the outlet of the thermostat, and the other end of the radiator is connected to the inlet of the water pump.

[0039] As an example, the temperature control branch also includes a radiator, one end of the radiator is connected to the outlet of the thermostat, and the other end of the radiator is connected to the water pump, that is, the outlet of the thermostat can be directly connected to the inlet of the water pump, or connected to the inlet of the water pump through the radiator. In this example, when the outlet of the thermostat is directly connected to the inlet of the water pump, the thermostat enters a small circulation state, that is, a circulation state of cylinder-thermostat-water pump-cylinder; when the outlet of the thermostat is connected to the inlet of the water pump through the radiator, the thermostat enters a large circulation state, that is, a circulation state of cylinder-thermostat-radiator-water pump-cylinder. In this example, the thermostat is a wax thermostat. When the coolant temperature is lower than the specified value, the refined paraffin in the thermostat is solid. The thermostat closes the channel between the engine and the radiator under the action of the spring. The coolant returns to the engine through the water pump and enters a small circulation state. When the coolant temperature reaches the specified value, the paraffin begins to melt and gradually becomes liquid. The volume increases and compresses the rubber tube to shrink. When the rubber tube shrinks, it exerts an upward thrust on the push rod. The push rod has a downward reverse thrust on the valve to open the valve. At this time, the coolant flows back to the engine through the radiator and thermostat valve through the water pump and enters a large circulation state. In this example, the thermostat is arranged in the water outlet pipeline of the cylinder body. The advantage of this is that the structure is simple and it is easy to remove bubbles in the cooling system.

[0040] As an example, the thermostat is adaptively adjusted to a small circulation state or a large circulation state, and the controller can control the switch valve to open or close, and there are several corresponding switching modes: the first switching mode is that the thermostat enters a small circulation state, and the switch valve is closed; the second switching mode is that the thermostat enters a small circulation state, and the switch valve is opened; the third switching mode is that the thermostat enters a large circulation state, and the switch valve is closed; the fourth switching mode is that the thermostat enters a large circulation state, and the switch valve is opened. When the thermostat enters a large circulation state, it means that the temperature in the cylinder body is relatively high. At this time, the radiator needs to be used to quickly dissipate heat. At this time, the switch valve is generally not controlled to open to allow the heater core to shunt. Therefore, the fourth switching mode rarely occurs. The second switching mode is a transition between the first switching mode and the third switching mode, that is, the radiator is used as the core heat dissipation element, and the heater core is used as an auxiliary transition heat dissipation element. It can achieve two-speed heat dissipation performance, create a difference in shunt cooling between the cylinder body and the cylinder head, and delay the opening time of the thermostat on the premise of ensuring that the cylinder head is not overheated and the combustion chamber does not detonate, further increase the temperature of the engine oil, and reduce friction. In this example, when the thermostat adaptively switches to the small circulation state or the large circulation state, after the switch valve is opened or closed, the speed of the water pump can be adjusted to make the engine enter different working modes to meet different needs.

[0041] In one embodiment, the engine cooling system further includes a controller, which is connected to the switch valve and the water pump and is used to control the operation of the switch valve and the water pump.

[0042] As an example, the controller is connected to the switch valve arranged between the first outlet of the cylinder head and the inlet of the water pump. According to actual conditions, the target opening corresponding to the switch valve can be determined to control the switch valve to operate based on the target opening, so as to achieve fine control of the coolant flowing out of the cylinder head to the water pump, which helps to ensure the cooling effect of the engine.

[0043] As an example, the controller is also connected to the water pump, and can determine the target speed of the water pump according to actual conditions to control the water pump to operate based on the target speed, so as to return the coolant output by the warm air branch and / or the temperature control branch to the cylinder body, thereby achieving fine control of the coolant input into the cylinder body by the water pump, which helps to ensure the cooling effect of the engine.

[0044] In this embodiment, a cylinder circulation branch is formed between the cylinder block and the cylinder head, which can absorb the heat of the cylinder block and the cylinder head at the same time, ensuring the cooling effect of the cylinder block and the cylinder head in series; the warm air branch is arranged between the first outlet of the cylinder head and the inlet of the water pump, and the opening of the switch valve and the speed of the water pump can be adjusted to ensure the cooling effect of the warm air branch on the cylinder head; the temperature control branch is arranged between the first outlet of the cylinder block and the inlet of the water pump, and the thermostat can adaptively switch to a small circulation state or a large circulation state according to the built-in temperature sensing component, and adjust the speed of the water pump to ensure the cooling effect of the temperature control branch on the cylinder block; moreover, the warm air branch and the temperature control branch are connected in parallel to the inlet of the water pump, and then flow back to the cylinder block through the water pump, so that the coolant in the warm air branch and the temperature control branch does not affect each other, which helps to ensure the cooling effect. The thermostat adaptively adjusts the state according to the sensing result of the built-in temperature sensing component, and the controller can control the switch valve and the water pump to achieve fine control of the opening of the switch valve and the speed of the water pump, which helps to ensure the cooling effect of the engine. In this example, the radiator serves as the core cooling element, while the heater core serves as an auxiliary transition cooling element, which can achieve two-speed cooling performance and create a difference in the diversion cooling of the cylinder block and the cylinder head. On the premise of ensuring that the cylinder head does not overheat and the combustion chamber does not detonate, the opening time of the thermostat is delayed to further increase the temperature of the engine oil and reduce friction.

[0045] In one embodiment, the engine cooling system also includes a first temperature sensor, which is arranged on the first outlet of the cylinder body and is used to collect the outlet water temperature; the controller is connected to the first temperature sensor and is used to control the operation of the switch valve and the water pump according to the outlet water temperature sent by the first temperature sensor.

[0046] As an example, the first temperature sensor is a temperature sensor disposed on the first outlet of the cylinder body. The first temperature sensor is used to collect the outlet water temperature T1 and send the outlet water temperature T1 to the controller, so that the controller determines the target mode that needs to be controlled to enter the engine according to the collected outlet water temperature T1, and then controls the switch valve to work based on the target opening of the target mode, and controls the water pump to work based on the target speed of the target mode.

[0047] In one embodiment, the engine cooling system further comprises a supercharger, wherein an inlet of the supercharger is connected to the second outlet of the cylinder block, and an outlet of the supercharger is connected to an inlet of the cylinder head.

[0048] As an example, the supercharger is disposed between the second outlet of the cylinder block and the inlet of the cylinder head, and coolant can be drawn from the second outlet of the cylinder block and then returned to the cylinder head without the need for an additional overflow pipe, which helps save costs and simplify the structure.

[0049] In one embodiment, an overflow port is provided on the cylinder head; the engine cooling system further comprises an expansion water tank, the inlet of the expansion water tank is connected to the overflow port, and the outlet of the expansion water tank is connected to the inlet of the water pump.

[0050] As an example, an overflow port is designed on the cylinder head, and an expansion water tank is arranged between the overflow port of the cylinder head and the inlet of the water pump. The coolant overflowing from the cylinder head is returned to the cylinder body through the water pump to achieve the purpose of water replenishment.

[0051] In one embodiment, the engine cooling system further comprises an oil cooler, one end of the oil cooler is connected to the third outlet of the cylinder block, and the other end of the oil cooler is connected to the second inlet of the cylinder block.

[0052] In one embodiment, the water pump is an electronic water pump. An electronic water pump is a water pump that uses piezoelectric materials as a power device, completely realizes electronicization from control to drive, and completely controls liquid transmission with an electronic integrated system, thereby achieving adjustability and accuracy of liquid transmission. In this example, the electronic water pump can be connected to a controller, and can be finely controlled according to the control signal of the controller to ensure control accuracy.

[0053] As an example, the engine cooling system also includes an oil cooler, one end of the oil cooler is connected to the third outlet of the cylinder body, and the other end of the oil cooler is connected to the second inlet of the cylinder body, which is used to cool the engine oil in the cylinder body to ensure the cooling effect of the engine oil.

[0054] In one embodiment, the cylinder circulation branch includes a first pipe and a second pipe connected between the cylinder block and the cylinder head.

[0055] As an example, an outlet of the cylinder block is connected to an inlet of the cylinder head through a first pipe, and an outlet of the cylinder head is connected to an inlet of the cylinder block through a second pipe, so that a cylinder circulation branch is formed between the cylinder block and the cylinder head. The coolant flowing into the cylinder block from the water pump first flows into the cylinder block, flows from the cylinder block into the cylinder head through the first pipe, and flows back to the cylinder block from the cylinder head through the second pipe, so that the coolant flows between the cylinder block and the cylinder head, so that the coolant can absorb the heat of the cylinder block and the cylinder head.

[0056] The existing engine cooling system has the problem of incompatibility of different modes when performing mode control. For example, after the engine is shut down, if the cooling system stops flowing, the high temperature of 800-900℃ inside the supercharger will boil the nearby coolant in a short time, so it is generally required to run afterward. However, in the process of cooling the coolant out of the radiator, the coolant in other parts of the engine will also be taken out to the radiator for heat exchange, and the overall heat dissipation is relatively large. However, due to the large number of start-stop conditions of hybrid vehicles, if the temperature drops too fast after each shutdown, the next start needs to be reheated, and the low friction effect cannot be maintained. It is also very unfavorable to avoid oil dilution in cold areas. Therefore, there is a high demand for heat preservation, that is, the two requirements of supercharger post-operation and oil heat preservation are contradictory, and there is no need to achieve both. For another example, during the shutdown of the hybrid vehicle engine, there is still heat inside the body. If there is a need for warm air, the flow can be maintained to a certain extent to utilize the internal waste heat, but the utilization of waste heat from warm air generally conflicts with the need for oil heat preservation and cannot be achieved.

[0057] In one embodiment, if Figure 2 As shown, a method for controlling an engine cooling system is provided, which is applicable to the engine cooling system in the above embodiment and can be applied to a controller. The method includes:

[0058] S201: when the engine is in the current mode, obtaining measured data;

[0059] S202: If the measured data meets the preset switching conditions, the switchable mode corresponding to the preset switching conditions is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, the water pump is controlled to operate based on the target speed corresponding to the target mode, and the thermostat is adaptively adjusted.

[0060] The current mode refers to the working mode that the engine is in at the current moment. The target mode refers to the working mode that the engine needs to switch to, that is, the working mode that the engine needs to enter at the next moment. The target mode refers to one of the multiple switchable modes corresponding to the current mode, and the switchable mode here refers to the working mode that can be switched from the current mode. The preset switching condition is a pre-set condition for switching from the current mode to a certain switchable mode.

[0061] The measured data refers to data collected in real time. As an example, the measured data includes but is not limited to engine speed, flameout interval and engine outlet water temperature T1.

[0062] As an example, in step S201, when the engine is in the current mode, the EMS can determine at least one switchable mode corresponding to the current mode and the preset switching condition corresponding to each switchable mode according to the current mode, and based on the preset switching conditions corresponding to all switchable modes, collect the measured data corresponding to the preset switching conditions. For example, if the preset switching condition between the current mode and a switchable mode is to determine whether the outlet water temperature T1 reaches a certain threshold, it is necessary to collect the measured data of the outlet water temperature T1 of the engine.

[0063] As an example, in step S202, when the engine is in the current mode, the EMS compares the measured data it obtains with the preset switching conditions corresponding to at least one switchable mode. If the measured data meets a preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, that is, the operating mode that the engine needs to be controlled to enter at the next moment is determined.

[0064] In this example, after determining the target mode, the EMS must first determine the target opening corresponding to the switch valve based on the target mode. The target opening here can be a preset opening value, or an opening value determined in real time based on the engine's outlet water temperature T1, ambient temperature, engine operating conditions or other measured data; then, the switch valve is controlled to operate based on the target opening so that the warm air branch between the cylinder head and the water pump works or does not work, thereby meeting the opening requirement of the switch valve in the target mode, specifically meeting the heat dissipation requirement for the cylinder head in the target mode.

[0065] In this example, after determining the target mode, the EMS must first determine the target speed corresponding to the water pump based on the target mode. The target speed here can be a preset speed value, or a speed value determined in real time based on the outlet water temperature T1, ambient temperature, engine operating conditions or other measured data; then, the water pump is controlled based on the target speed to control the flow rate of the coolant injected into the cylinder by the water pump to meet the opening requirement of the water pump under the target mode.

[0066] In this example, when the engine switches from the current mode to the target mode, the EMS thermostat adaptively adjusts its state, that is, it adaptively switches to a small cycle state (cylinder block - thermostat - water pump - cylinder block) or a large cycle state (cylinder block - thermostat - radiator - water pump - cylinder block) according to the temperature detected by its built-in temperature sensing component to meet the heat dissipation requirements of the cylinder block in the target mode.

[0067] In this embodiment, when the measured data collected in the current mode meets the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, and then the target opening and target speed corresponding to the target mode are determined; the switch valve in the warm air branch is controlled to work based on the target opening to meet the need for heat dissipation of the cylinder head through the warm air branch; the thermostat is adaptively adjusted to switch into different states according to the temperature detected by the built-in temperature sensing component to meet the need for heat dissipation of the cylinder body by the temperature control branch; finally, the water pump is controlled to work based on the target speed, so that both the warm air branch and the temperature control branch return to the cylinder body through the water pump to meet the different opening requirements of the water pump under the target mode, so as to ensure the cooling effect of the engine cooling system under the target mode. The thermostat autonomously adjusts the state according to the temperature detected by the temperature sensing component, and the controller can determine the target mode to be switched to based on the measured data, and then control the switch valve and the water pump to work respectively according to the target opening and target speed corresponding to each target mode, so that there is no mutual interference between different target modes, and multiple target modes can be compatible with each other.

[0068] In one embodiment, if Figure 3 As shown, a method for controlling an engine cooling system is provided, which can be applied in a controller (hereinafter referred to as EMS), and the control method includes:

[0069] S301: when the engine is in a starting mode, obtaining an engine speed;

[0070] S302: If the engine speed is not zero, the pre-processing mode is determined as the target mode, the switch valve is controlled to be closed, the water pump is controlled to operate based on the first calibrated speed, and the thermostat enters a small circulation state.

[0071] Wherein, step S301 is a specific implementation of step S201, and step S302 is a specific implementation of step S202.

[0072] The start mode refers to the mode in which the engine is after the vehicle is started. The first calibrated speed refers to the target speed corresponding to the pre-processing mode calibrated in advance. The target speed here is the speed at which the water pump needs to be controlled. As an example, when the engine enters the pre-processing mode, the pre-calibrated first calibrated speed can be set to 70% of the maximum speed. The pre-processing mode refers to the first mode in which the engine cooling system starts to work.

[0073] As an example, in step S301, after the vehicle is started and enters the start mode (ie, the start status bit B_stend is 1), the EMS starts to detect the engine speed EngSpd, and needs to determine whether the engine speed EngSpd is zero to determine whether the preset switching conditions of the pre-processing mode are met.

[0074] As an example, in step S302, when the engine speed EngSpd is not zero, the EMS can be deemed to be activated, and the activation status bit B_start=1. At this time, it is determined that the preset switching conditions of the preprocessing mode are met, and the engine needs to be controlled to enter the preprocessing mode. The mode status bit corresponding to the preprocessing mode is set to 0, that is, Set_model=0.

[0075] As an example, when the engine is in the starting mode and the engine speed EngSpd is not zero, the EMS can determine that the temperature of the coolant inside the engine is low. At this time, the thermostat adaptively enters the small circulation state according to the detected temperature, that is, the coolant output by the cylinder can directly enter the water pump through the thermostat without entering the water pump through the radiator; when the engine is in the starting mode and the engine speed EngSpd is not zero, the EMS determines that the preset switching conditions of the pre-treatment mode are met. At this time, the EMS needs to control the switch valve to close. Specifically, in the pre-treatment mode, the target opening of the switch valve is set to zero, that is, p_target_bpv=inicheck_bpv (typical value is 0%), and the warm air branch is closed, so that the warm air branch does not participate in the coolant circulation. In addition, the EMS needs to obtain the first calibrated speed corresponding to the pre-treatment mode as the target speed, that is, the target speed n_target_ewp=inicheck_ewp (this value is preset by calibration, and the typical value is 70%); then, the water pump is controlled to work based on the target speed. When the engine enters the pre-treatment mode from the start-up mode, the coolant output by the water pump enters the cylinder block; the coolant in the cylinder block is directly transmitted to the cylinder head and then to the cylinder head through the supercharger; the coolant in the cylinder head flows back to the cylinder block and flows into the water pump through the thermostat connected to the cylinder block. The water pump operates based on the first calibrated speed, so that the engine enters the pre-treatment mode Set_model=0. At this time, the engine cooling system is cooled through the small circulation state of the cylinder circulation branch and the temperature control branch. There is no need to cool the cylinder head through the warm air branch, nor is there any need to dissipate heat to the cylinder block through the large circulation branch where the radiator is located, which can meet the cooling requirements under the pre-treatment module.

[0076] In one embodiment, if Figure 4 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0077] S401: When the engine is in a pre-processing mode, obtaining a flameout interval time;

[0078] S402: If the flameout interval is less than the first time threshold, the normal mode is determined as the target mode, the switch valve is controlled to be closed, and the water pump is controlled to enter the third operating mode according to the engine operating condition and the outlet water temperature, and the thermostat enters the small circulation state or the large circulation state;

[0079] S403: If the flameout interval is not less than the first time threshold, the first heat engine mode is determined as the target mode, the switch valve is controlled to be closed, the water pump is controlled to enter the intermittent working mode, and the thermostat enters the small circulation state.

[0080] Among them, step S401 is a specific implementation of step S201, and step S402 and step S403 are specific implementations of step S202.

[0081] The flameout interval time refers to the interval time between the current moment and the most recent flameout moment, and the first time threshold is a pre-set threshold used to evaluate whether the time interval reaches a shorter standard. The first warm-up mode is a mode for quickly heating the coolant in the engine. The normal mode refers to the mode after the engine is fully warmed up.

[0082] As an example, in step S401, when the engine is in the pre-processing mode Set_model=0, the EMS needs to determine the flameout interval corresponding to the pre-processing mode Set_model=0 based on the current moment and the most recent flameout moment; then, the flameout interval can be compared with the preset first time threshold, so as to determine the engine state based on the comparison result. The engine state refers to the state of the engine at the current moment, which can be either a hot state or a cold state. The hot state and cold state here are determined by the temperature of the coolant inside the engine. For example, when the coolant inside the engine is water, the hot state here refers to the state where the engine is hot water, and conversely, the cold state refers to the state where the engine is cold water.

[0083] As an example, in step S402, when the flameout interval is less than the first time threshold, the EMS determines that the interval between the current moment and the flameout moment at the end of the last driving cycle is short. At this time, the coolant temperature inside the engine is high, and the engine state can be determined to be hot, and no warm-up operation is required. It can be determined that it meets the preset switching conditions corresponding to the normal mode, and the normal mode is determined as the target mode. At this time, the thermostat self-adapts to adjust the state, that is, the thermostat adjusts itself based on its physical characteristics under the change of water temperature, and adjusts the opening ratio of the large cycle and the small cycle, so that the coolant output by the cylinder can directly flow back to the water pump through the small cycle and enter the small cycle state, or flow back to the water pump through the radiator and enter the large cycle state. In this example, when the EMS determines the normal mode as the target mode, it needs to control the switch valve to close so that the warm air branch does not participate in the coolant circulation, ensure that the warm air core does not divert, and ensure that the radiator has enough coolant under high temperature conditions; the EMS also controls the water pump to enter the third operating mode according to the engine operating conditions and the outlet water temperature, so as to adjust its target speed according to the outlet water temperature T1 and the engine operating conditions, so as to achieve adaptive adjustment. Among them, the third operating mode refers to the mode of adaptive adjustment of the water pump according to the engine operating conditions (including but not limited to engine speed and engine load conditions) and the outlet water temperature T1. In this example, the normal mode of the engine refers to the mode in which the thermostat adaptively adjusts the opening ratio, the switch valve is closed, and the water pump enters the mode corresponding to the third operating mode.

[0084] As an example, in step S403, when the flameout interval is not less than the first time threshold, the EMS determines that the interval between the current moment and the flameout moment at the end of the last driving cycle is long. At this time, the coolant temperature inside the engine is low, and it can be determined that the engine state is cold and needs to be quickly heated up. It can be determined that the preset switching conditions corresponding to the first heat engine mode are met, and the first heat engine mode is determined as the target mode. At this time, due to the low temperature of the coolant inside the engine, the thermostat needs to enter the small circulation state, that is, the coolant output by the cylinder can directly enter the water pump through the thermostat without entering the water pump through the radiator. Accordingly, when the EMS determines the first heat engine mode as the target mode, it needs to control the switch valve to close, specifically, the target opening of the switch valve can be set to zero, the warm air branch is closed, so that the warm air branch does not participate in the coolant circulation, avoids the warm air branch diversion, and ensures the purpose of rapid heat engine; and the EMS needs to control the water pump to enter the intermittent working mode so that the engine enters the first heat engine mode. The intermittent working mode here refers to a working mode in which the water pump is controlled to work for a period of time based on the target speed and then stop working, and then continue to work after stopping for a period of time, in a reciprocating manner. Each time the water pump stops working, the coolant in the engine cooling system stops flowing, and its heat will quickly focus inside the cylinder block and cylinder head, while causing the oil temperature to rise rapidly, so as to achieve the purpose of rapid warm-up. In this example, the first warm-up mode refers to the mode corresponding to the thermostat entering the small circulation state, the switch valve is closed, and the water pump enters the intermittent working mode.

[0085] In this example, when the engine enters the first heat engine mode from the pre-treatment mode, the coolant output by the water pump enters the cylinder body; the coolant in the cylinder body can be directly transmitted to the cylinder head and transmitted to the cylinder head through the supercharger; the coolant in the cylinder head flows back to the cylinder body, flows into the water pump through the thermostat connected to the cylinder body, and controls the water pump to enter the intermittent working mode, so that the engine enters the first heat engine mode Set_model=1. When the water pump is controlled to enter the intermittent working mode, each time the water pump stops working, the coolant in the engine cooling system stops flowing, and its heat will quickly focus inside the cylinder body and the cylinder head, and at the same time, the oil temperature will rise rapidly, so as to achieve the purpose of rapid heat engine; each time the water pump works based on the target speed, the coolant in the engine cooling system flows and can flow out of the cylinder body, so that the temperature sensor set at the engine outlet can make further judgments based on the real-time detected engine outlet water temperature T1.

[0086] In one embodiment, if Figure 5 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0087] S501: when the engine is in a pre-treatment mode, obtaining an outlet water temperature of the engine;

[0088] S502: If at least one outlet water temperature obtained within the preset time is greater than the first temperature threshold, the normal mode is determined as the target mode, the switch valve is controlled to be closed, and the water pump is controlled to enter the third operating mode according to the engine operating condition and the outlet water temperature, and the thermostat enters the small circulation state or the large circulation state;

[0089] S503: If all outlet water temperatures obtained within the preset time are not greater than the first temperature threshold, the first heat engine mode is determined as the target mode, the switch valve is controlled to be closed, the water pump is controlled to enter the intermittent working mode, and the thermostat enters the small circulation state.

[0090] Among them, step S501 is a specific implementation of step S201, and step S502 and step S503 are specific implementations of step S202.

[0091] The outlet water temperature of the engine refers to the water temperature at the outlet of the engine, specifically the temperature collected in real time by the temperature sensor installed at the outlet of the engine, which can be represented by T1. The first temperature threshold refers to the pre-set temperature threshold used to evaluate and determine the engine status, which can be represented by Tth1. The first heat engine mode is a mode for quickly heating the coolant in the engine. The normal mode refers to the mode after the engine is completely warmed up.

[0092] As an example, in step S501, when the engine is in the pre-processing mode Set_model=0, the EMS can obtain the engine outlet water temperature T1 collected in real time by the temperature sensor set at the engine outlet, and compare the engine outlet water temperature T1 with the first temperature threshold, so as to determine the engine state according to the comparison result.

[0093] As an example, in step S502, when the outlet water temperature T1 of at least one engine obtained by the EMS within a preset time period is greater than the first temperature threshold, it is determined that the coolant temperature at the engine outlet is high, and the engine state can be determined to be hot, and there is no need to perform a rapid warm-up operation. It can be determined that it meets the preset switching conditions corresponding to the normal mode, and the normal mode is determined as the target mode. At this time, the thermostat adaptively adjusts the state, switches to the small cycle state or the large cycle state, controls the switch valve to close, and controls the water pump to enter the third operating mode according to the engine operating condition and the outlet water temperature, so that the engine enters the normal mode. The processing process is similar to step S402, and to avoid repetition, it is not repeated here.

[0094] As an example, in step S503, when the outlet water temperature T1 of all engines obtained by the EMS within the preset time period is not greater than the first temperature threshold value Tth1, it is determined that the coolant temperature at the engine outlet is low, and the engine state can be determined to be cold, and a rapid heat-up operation is required. It can be determined that the preset switching conditions corresponding to the first heat-up mode are met, and the first heat-up mode is determined as the target mode. The switch valve can be controlled to close, so that the thermostat enters a small circulation state, and the water pump is controlled to enter an intermittent working mode, so that the engine enters the first heat-up mode. The processing process is similar to step S403, and to avoid repetition, it is not described here one by one. In this example, because the coolant inside the engine cooling system does not flow in the first heat-up mode, it is impossible to grasp the exit timing of the first heat-up mode. Therefore, it is necessary to control the water pump to enter an intermittent working mode in order to intermittently judge and subsequently control the engine state.

[0095] In this example, when the engine enters the first heat engine mode from the pre-treatment mode, the coolant output by the water pump enters the cylinder body; the coolant in the cylinder body can be directly transmitted to the cylinder head and transmitted to the cylinder head through the supercharger; the coolant in the cylinder head flows back to the cylinder body, flows into the water pump through the thermostat connected to the cylinder body, and controls the water pump to enter the intermittent working mode, so that the engine enters the first heat engine mode Set_model=1. When the water pump is controlled to enter the intermittent working mode, each time the water pump stops working, the coolant in the engine cooling system stops flowing, and its heat will quickly focus inside the cylinder body and the cylinder head, and at the same time, the oil temperature will rise rapidly, so as to achieve the purpose of rapid heat engine; each time the water pump works based on the target speed, the coolant in the engine cooling system flows and can flow out of the cylinder body, so that the temperature sensor set at the engine outlet can make further judgments based on the real-time detected engine outlet water temperature T1.

[0096] In one embodiment, in step S403 or step S503, controlling the water pump to enter the intermittent working mode includes:

[0097] (1) querying a first temperature speed table, a first temperature operation time table, and a first temperature stop time table based on the outlet water temperature of the engine to obtain a target speed, a target operation time, and a target stop time, respectively;

[0098] (2) Control the water pump to operate based on the target speed and monitor the running time of the water pump;

[0099] (3) When the water pump operation time reaches the target operation time, the water pump is controlled to stop working and the current stop time is monitored;

[0100] (4) When the current rest time reaches the target rest time, the water pump is repeatedly controlled to operate based on the target speed and the running time of the water pump is monitored.

[0101] As an example, the EMS can query the pre-set first temperature and speed table based on the outlet water temperature T1 of the engine, and obtain the target speed corresponding to the outlet water temperature T1 from the first temperature and speed table. The first temperature and speed table is a pre-configured two-dimensional mapping table for reflecting the corresponding relationship between the outlet water temperature T1 and the water pump speed, specifically a two-dimensional mapping table corresponding to the first thermal engine mode, which can be represented by Map_int_n_rapid_M1, and accordingly, the target speed obtained by the table query can be represented by int_n_rapid_M1.

[0102] As an example, the EMS can query the preset first temperature operation schedule based on the outlet water temperature T1 of the engine, and obtain the target operation time corresponding to the outlet water temperature T1 from the first temperature operation schedule. The first temperature operation schedule is a preset two-dimensional mapping table for reflecting the corresponding relationship between the outlet water temperature T1 and the target operation time, specifically a two-dimensional mapping table corresponding to the first thermal engine mode, which can be represented by Map_int_onti_rapid_M1_ewp, and accordingly, the target operation time obtained by the table query can be represented by int_ti_rapid_M1_ewp.

[0103] As an example, the EMS can query the preset first temperature stop time table based on the outlet water temperature T1 of the engine, and obtain the target stop time corresponding to the outlet water temperature T1 from the first temperature stop time table. The first temperature stop time table is a preset two-dimensional mapping table for reflecting the corresponding relationship between the outlet water temperature T1 and the target stop time, specifically a two-dimensional mapping table corresponding to the first heat engine mode, which can be represented by Map_int_offti_rapid_M1_ewp, and accordingly, the target stop time obtained by the table query can be represented by Map_int_offti_rapid_M1_ewp.

[0104] The running time of the water pump refers to the time difference between the current time and the start time of the water pump working based on the target speed. The current rest time refers to the time difference between the current time and the stop time of the water pump stopping working.

[0105] As an example, after obtaining the target speed, target operating time and target stop time corresponding to the engine's outlet water temperature T1, the EMS first controls the water pump to operate based on the target speed, and when the real-time monitored water pump operating time reaches the target operating time, the water pump is controlled to stop working; after the water pump stops working, after the current stop time monitored in real time reaches the target stop time, the EMS repeats the control of the water pump to operate based on the target speed, and when the real-time monitored water pump operating time reaches the target operating time, the water pump is controlled to stop working, and the cycle is repeated until the first heat engine mode is exited.

[0106] In this example, when the water pump is controlled to enter the intermittent working mode, each time the water pump stops working, the coolant in the engine cooling system stops flowing, and its heat will quickly focus inside the cylinder block and cylinder head, while causing the oil temperature to rise rapidly, so as to achieve the purpose of rapid warm-up; each time the water pump works based on the target speed, the coolant in the engine cooling system flows and can flow out of the cylinder body, so that the temperature sensor set at the engine outlet can make further judgments based on the real-time detected engine outlet water temperature T1.

[0107] In one embodiment, if Figure 6 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0108] S601: When the engine is in the first heating mode, obtaining the outlet water temperature of the engine;

[0109] S602: If the outlet water temperature is greater than the second temperature threshold, the second heat engine mode is determined as the target mode, the switch valve is controlled to be closed, and based on the outlet water temperature of the engine, the water pump is controlled to enter a low flow working mode, and the thermostat enters a small circulation state.

[0110] Wherein, step S601 is a specific implementation of step S201, and step S602 is a specific implementation of step S202.

[0111] The second temperature threshold is a preset temperature threshold used to evaluate whether a preset switching condition of the second heat engine mode is met, and can be represented by Tth2. Generally speaking, the second temperature threshold Tth2 is greater than the first temperature threshold Tth1.

[0112] As an example, in step S601, when the engine enters the first heat engine mode, that is, the EMS controls the switch valve to close, the thermostat to enter the small circulation state, and the water pump to enter the intermittent working mode, it is necessary to obtain the engine outlet water temperature T1 collected in real time by the temperature sensor set at the engine outlet, and then compare the outlet water temperature T1 with the second temperature threshold Tth2 to evaluate whether it is necessary to switch from the first heat engine mode to the second heat engine mode.

[0113] As an example, in step S602, when the outlet water temperature corresponding to the first heat engine mode is greater than the second temperature threshold, that is, T1>Tth2, the EMS can determine that the outlet water temperature T1 of the engine is high at this time, and the wall temperature of the cylinder block and the cylinder head has reached a certain level. During the water pump stop period, there are obvious temperature differences in various areas of the engine. At this time, the coolant needs to flow continuously through various areas of the engine to make the temperature field more uniform, but not too much, that is, the radiator is not required to take the extra heat out of the engine cooling system. Therefore, it is determined that the preset switching conditions corresponding to the second heat engine mode are met, and the second heat engine mode is determined as the target mode. At this time, the thermostat adaptively enters the small circulation state, and the switch valve can be controlled to close. Based on the outlet water temperature of the engine, the water pump is controlled to enter the low flow working mode to make the engine enter the second heat engine mode. The low flow working mode here refers to the working mode in which the water pump is controlled to work based on a lower speed so that the coolant flow is small. In this example, the second heat engine mode refers to the mode corresponding to the thermostat entering the small circulation state, the switch valve is closed, and the water pump enters the low flow working mode.

[0114] As an example, when the EMS needs to control the engine to enter the second heat engine mode from the first heat engine mode, the thermostat needs to enter the small circulation state due to the low temperature of the coolant inside the engine, that is, the coolant output from the cylinder can directly enter the water pump through the thermostat without entering the water pump through the radiator. At this time, the EMS needs to control the switch valve to close, specifically, the target opening of the switch valve can be set to zero, the warm air branch is closed, so that the warm air branch does not participate in the coolant circulation; and the EMS needs to determine the target speed corresponding to the outlet water temperature based on the engine outlet water temperature, using a preset strategy, and control the water pump to enter the low flow working mode, so as to achieve the purpose of uniform temperature field between the cylinder block and cylinder head of the engine.

[0115] In this example, when the engine enters the second heat engine mode from the first heat engine mode, the coolant output by the water pump enters the cylinder block; the coolant in the cylinder block can be directly transmitted to the cylinder head and transmitted to the cylinder head through the supercharger; the coolant in the cylinder head flows back to the cylinder block and flows into the water pump through the thermostat connected to the cylinder block. Based on the outlet water temperature of the engine, the water pump is controlled to enter the low-flow working mode, so that the engine enters the second heat engine mode Set_model = 2. When the water pump is controlled to enter the low-flow working mode based on the outlet water temperature of the engine, the water pump is controlled to work based on a lower speed so that the coolant with a lower flow rate continues to flow through the cylinder block and the cylinder head, so that the temperature field between the cylinder block and the cylinder head is more uniform.

[0116] In one embodiment, in step S602, based on the outlet water temperature of the engine, controlling the water pump to enter a low flow working mode includes:

[0117] The second temperature-speed table is queried based on the outlet water temperature of the engine to obtain the target speed, and the water pump is controlled to operate based on the target speed.

[0118] Among them, the second temperature and speed table is a pre-set two-dimensional mapping table for reflecting the corresponding relationship between the outlet water temperature T1 and the water pump speed, specifically a two-dimensional mapping table corresponding to the second thermal engine mode, which can be represented by Map_int_n_rapid_M2. Accordingly, the target speed obtained by looking up the table can be represented by int_n_rapid_M2.

[0119] As an example, the EMS can query the preset second temperature and speed table Map_int_n_rapid_M2 based on the outlet water temperature T1 of the engine, obtain the target speed corresponding to the outlet water temperature T1 from the second temperature and speed table Map_int_n_rapid_M2, and then control the water pump to work based on the target speed. Generally speaking, the target speed matched with the outlet water temperature T1 determined from the second temperature and speed table is lower than the target speed corresponding to the outlet water temperature T1 determined from the first temperature and speed table, so that when the engine enters the second heat engine mode, the coolant flow entering the engine is small, which can meet the purpose of uniform temperature increase.

[0120] In one embodiment, if Figure 7 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0121] S701: When the engine is in the second heating mode, obtaining an outlet water temperature and an air conditioning demand of the engine;

[0122] S702: If the outlet water temperature is greater than the third temperature threshold and the air conditioning demand is for heating, the first heating mode is determined as the target mode, the switch valve is controlled to open, the water pump is controlled to operate based on the second calibrated speed, and the thermostat enters a small circulation state.

[0123] Wherein, step S701 is a specific implementation of step S201, and step S702 is a specific implementation of step S202.

[0124] The air conditioning demand refers to the demand sent by the air conditioning system (Heating Ventilation Air Conditioning, hereinafter referred to as HVAC), and the air conditioning demand may include heating demand and no heating demand. For example, Bit_heater=1 can be used to indicate heating demand, and Bit_heater=0 can be used to indicate no heating demand.

[0125] The third temperature threshold is a preset temperature threshold for evaluating whether it is necessary to switch to the first heating mode, which can be represented by Tth3. Generally speaking, the third temperature threshold Tth3 is greater than the second temperature threshold Tth2.

[0126] The second calibrated speed refers to the pre-calibrated target speed for controlling the operation of the water pump, which can be set to 50% of the maximum speed, and can provide a flow rate that supports the heating demand. The first heating mode is a mode for controlling the operation of the heating core to meet the heating demand, which is a mode between the second heat engine mode and the diversion mode, and can be represented by Set_model=2.5.

[0127] As an example, in step S701, when the engine is in the second heating mode Set_model=2, the EMS can obtain the engine outlet water temperature T1 collected in the second heating mode and the air conditioning demand sent by the air-conditioning system HVAC, so as to evaluate whether it is necessary to enter the first heating mode based on the outlet water temperature T1 and the air conditioning demand.

[0128] As an example, in step S702, when the outlet water temperature is greater than the third temperature threshold (i.e., T1>Tth3) and the air conditioning demand is a heating demand (Bit_heater=1), the EMS determines that the outlet water temperature of the engine is high, the engine is basically completely heated, and can provide sufficient warm air by itself, and the EMS analyzes and judges the air conditioning demand of the HVAC transmission process of the air conditioning system. When it is determined that the air conditioning demand is a heating demand, it can be determined that the preset switching conditions corresponding to the first heating mode are met, and the first heating mode is determined as the target mode, that is, the engine needs to be controlled to enter the first heating mode, and its mode state bit is set to Set_model=2.5. Accordingly, when the outlet water temperature is not greater than the third temperature threshold, the EMS determines that the engine is not completely heated, cannot provide sufficient warm air, and will not switch to the first heating mode; or, when the air conditioning demand analyzed by the EMS is no heating demand (Bit_heater=0), there is no need to consider the warm air demand additionally, and the first heating mode will not be entered.

[0129] As an example, when the EMS needs to control the engine from the second heat engine mode Set_model=2 to the first heating mode Set_model=2.5, the thermostat automatically enters the small circulation state, that is, the coolant output by the cylinder can directly enter the water pump through the thermostat without passing through the radiator to enter the water pump. At this time, the coolant in the warm air branch and the coolant output by the thermostat through the small circulation are both input into the water pump; at this time, the EMS needs to control the switch valve to open (that is, p_target_bpv=on), open the warm air branch, and allow the warm air branch to participate in the coolant circulation; and, the EMS needs to obtain the second calibrated speed corresponding to the warm air demand as the target speed, and control the water pump to work based on the target speed.

[0130] In this example, when the engine enters the first heating mode from the second heat engine mode, the coolant output by the water pump enters the cylinder body; the coolant in the cylinder body can be directly transmitted to the cylinder head, and then transmitted to the cylinder head through the supercharger; the coolant in the cylinder head can flow back to the water pump through the cylinder body and the thermostat, and then flow back to the water pump through the warm air branch formed by the switch valve and the warm air core. The water pump works based on the second calibrated speed, so that the engine enters the first heating mode Set_model=2.5. Since the temperature of the coolant in the engine is relatively high when the engine enters the first heating mode, it can meet the warm air demand after passing through the warm air core. Furthermore, the EMS can also send a blower permission signal to the air conditioning system HVAC so that the air conditioning system can control the blower to work. Specifically, the status bit Bit_HtqForb can be set to 0 and sent to the air conditioning system HVAC so that the air conditioning system HVAC starts the blower to work and ensure the warm air effect.

[0131] In one embodiment, if Figure 8 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0132] S801: When the engine is in the second heating mode or the first heating mode, obtaining the outlet water temperature of the engine;

[0133] S802: If the outlet water temperature is greater than the fourth temperature threshold, the diversion mode is determined as the target mode, the switch valve is controlled to open, and according to the engine operating condition and the outlet water temperature, the water pump is controlled to enter the first operating mode and the thermostat enters the small circulation state.

[0134] Wherein, step S801 is a specific implementation of step S201, and step S802 is a specific implementation of step S202.

[0135] The fourth temperature threshold is a preset temperature threshold for evaluating whether to switch to the split mode, which can be represented by Tth4. Generally speaking, the fourth temperature threshold Tth4 is greater than the third temperature threshold Tth3. The split mode is a mode of splitting the cylinder block and the cylinder head, which can be represented by Set_model=3.

[0136] As an example, in step S801, when the engine is in the second heating mode Set_model=2 or the first heating mode Set_model=2.5, the EMS can obtain the outlet water temperature T1 of the engine, and compare the outlet water temperature T1 with the preset fourth temperature threshold Tth4, so as to determine whether the preset switching conditions corresponding to the diversion mode are met based on the comparison result.

[0137] As an example, in step S802, when the outlet water temperature is greater than the fourth temperature threshold, that is, T1>Tth4, the EMS determines that the outlet water temperature of the engine is high, the cylinder has accumulated a certain amount of heat, and the oil temperature meets the thermal engine requirements. At this time, it is necessary to give priority to the uniformity of the temperature inside the cylinder, so a certain circulation flow is required. At this time, it can be determined that the preset switching conditions corresponding to the shunt mode are met, and the shunt mode is determined as the target mode. In this example, when the EMS controls the engine to enter the shunt mode, the thermostat adaptively enters the small circulation state, and the EMS controls the switch valve to open. According to the engine operating conditions and the outlet water temperature, the water pump is controlled to enter the first operating mode to make the engine enter the shunt mode. The first operating mode refers to a mode of adaptive adjustment of the water pump according to the engine operating conditions (including but not limited to engine speed and engine load conditions) and the outlet water temperature T1, specifically a working condition adjustment mode corresponding to the shunt mode.

[0138] As an example, when the EMS needs to control the engine from the second heat engine mode Set_model=2 or the first heating mode Set_model=2.5 to the diversion mode Set_model=3, the thermostat enters the small circulation state, that is, the coolant output by the cylinder can directly enter the water pump through the thermostat without passing through the radiator to enter the water pump. At this time, the hot water in the cylinder flows back to the water pump to maintain a higher temperature, which is effective in maintaining the engine oil temperature; at this time, the EMS controls the switch valve to open (that is, p_target_bpv=on), opens the warm air branch, and allows the warm air branch to participate in the coolant circulation. At this time, the hot water in the cylinder head can flow through the warm air core to provide minimum heat dissipation for the cylinder head; and, the EMS needs to control the water pump to enter the first operating mode according to the engine operating conditions and the outlet water temperature, so as to adaptively adjust the speed of the water pump according to the engine operating conditions. The first operating mode here refers to the process of determining and controlling the target speed of the electronic water source based on the engine operating conditions and the outlet water temperature in the diversion mode. For example, a speed can be determined by querying the operating speed table corresponding to the diversion mode based on the engine operating conditions, and another speed can be determined by querying the temperature speed table corresponding to the diversion mode based on the outlet water temperature. Then, the target speed is determined based on the comparison of the two speeds, so as to control the operation of the water pump based on the target speed. In this example, the reasons for increasing the initial opening temperature of the thermostat (determined by the physical properties of paraffin) are as follows: First, when it is not necessary, the internal temperature of the engine body is increased as much as possible, and the viscosity of the engine oil is reduced after the oil temperature is increased, so as to achieve low friction; second, under this system architecture, the warm air core can be used as a radiator to achieve low heat flux heat exchange, and when the outlet water temperature is at a low level, external heat exchange is achieved without opening the radiator (equivalent to a radiator with two gears, the warm air is a low-speed heat exchange, and the heat exchange is too strong when the radiator is directly opened), so as to achieve the purpose of ensuring temperature uniformity.

[0139] In this example, when the engine enters the diversion mode from the second heat engine mode or the first heating mode, the coolant output by the water pump enters the cylinder block; the coolant in the cylinder block can be directly transmitted to the cylinder head, and then transmitted to the cylinder head through the supercharger; the coolant in the cylinder head can flow back to the water pump through the cylinder block and the thermostat, and flow back to the water pump through the switch valve and the heater core. According to the engine operating conditions and the outlet water temperature, the water pump is controlled to enter the first operating mode to adaptively adjust the speed of the water pump according to the engine operating conditions, so that the engine enters the diversion mode Set_model=3, so as to achieve the purpose of diversion between the cylinder block and the cylinder head, and ensure the uniformity of the internal temperature of the cylinder block and the cylinder head.

[0140] In one embodiment, the engine operating conditions include engine speed and engine load;

[0141] Step S802, i.e., controlling the water pump to enter the first operating mode according to the engine operating condition and the outlet water temperature, includes:

[0142] (1) querying a first operating condition speed table based on the engine speed and the engine load to obtain a first speed;

[0143] (2) querying a third temperature-speed table based on the outlet water temperature of the engine to obtain a second speed;

[0144] (3) The larger value between the first speed and the second speed is determined as the target speed, and the water pump is controlled to operate based on the target speed.

[0145] As an example, the EMS can obtain the engine speed and the engine load, and query the pre-set first operating condition speed table based on the engine operating conditions such as the engine speed and the engine load, and obtain the first speed corresponding to the engine speed and the engine load from the first operating condition speed table. Among them, the first operating condition speed table refers to a three-dimensional mapping table pre-set in the split mode to reflect the corresponding relationship between the engine speed, the engine load and the water pump speed, which can be represented by n_target_eng_ewp_M3. Accordingly, the first speed is the water pump speed that matches the engine speed and the engine load determined by the table lookup.

[0146] As an example, the EMS can obtain the outlet water temperature T1 of the engine, query the pre-set third temperature and speed table based on the outlet water temperature T1, and obtain the second speed corresponding to the outlet water temperature T1 from the third temperature and speed table. The third temperature and speed table is a two-dimensional mapping table used to reflect the corresponding relationship between the outlet water temperature T1 and the water pump speed in the diversion mode, which can be represented by Map_n_target_T1_ewp_M3. Accordingly, the second speed is the water pump speed corresponding to the outlet water temperature T1 determined by the table lookup.

[0147] As an example, after the EMS obtains the first speed and the second speed from the table, it can compare the two, determine the larger value of the first speed and the second speed as the target speed, and then control the water pump to work based on the target speed. Understandably, when the engine enters the diversion mode, the switch valve is opened, so that the warm air branch participates in the coolant circulation, and the hot water in the cylinder head can flow through the warm air core to provide the cylinder head with minimum heat dissipation; the thermostat enters the small cycle, and the hot water in the cylinder body flows back to the water pump to maintain a higher temperature, which has a better effect on maintaining the oil temperature. At this time, the water pump is controlled to work based on the larger value of the first speed and the second speed, so that it matches the engine operating condition and meets the heat demand corresponding to the engine operating condition.

[0148] In one embodiment, if Fig. 9 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0149] S901: when the engine is in the diversion mode, obtaining the outlet water temperature and air conditioning demand of the engine;

[0150] S902: If the outlet water temperature is greater than the fifth temperature threshold and the air conditioning demand is for heating, the second heating mode is determined as the target mode, the switch valve is controlled to open, and according to the engine operating condition and the outlet water temperature, the water pump is controlled to enter the second operating mode and the thermostat enters the small circulation state.

[0151] Wherein, step S901 is a specific implementation of step S201, and step S902 is a specific implementation of step S202.

[0152] The fifth temperature threshold is a preset temperature threshold for evaluating whether it is necessary to switch to the second heating mode, which can be represented by Tth5. Generally speaking, the fifth temperature threshold Tth5 is greater than the fourth temperature threshold Tth4. The second heating mode is a mode for controlling the operation of the heater core to meet the heating demand. It is a mode between the diversion mode and the normal mode, which can be represented by Set_model=3.5.

[0153] As an example, in step S901, when the engine is in the diversion mode Set_model=3, the EMS can obtain the engine outlet water temperature T1 collected in the diversion mode and the air conditioning demand sent by the air-conditioning system HVAC, so as to evaluate whether it is necessary to enter the second heating mode based on the outlet water temperature T1 and the air conditioning demand.

[0154] As an example, in step S902, when the outlet water temperature is greater than the fifth temperature threshold (i.e., T2>Tth5) and the air conditioning demand is a heating demand (Bit_heater=1), the EMS determines that the outlet water temperature of the engine is high, the engine is basically completely heated, and can provide sufficient warm air by itself, and the EMS analyzes and judges the air conditioning demand of the air conditioning system HVAC transmission process. When it is determined that the air conditioning demand is a heating demand, it can be determined that the preset switching conditions corresponding to the second heating mode are met, and the engine needs to be controlled to enter the second heating mode, and its mode state bit is set to Set_model=3.5. Accordingly, when the outlet water temperature is not greater than the fifth temperature threshold, the EMS determines that the engine is not completely heated, cannot provide sufficient warm air, and will not switch to the second heating mode; or, when the air conditioning demand analyzed by the EMS is no heating demand (Bit_heater=0), there is no need to consider the warm air demand additionally, and the second heating mode will not be entered.

[0155] As an example, when the EMS needs to control the engine from the bypass mode Set_model=3 to the second heating mode Set_model=3.5, the thermostat enters the small circulation state, that is, the coolant output by the cylinder can directly enter the water pump through the thermostat without entering the water pump through the radiator. At this time, the coolant in the warm air branch and the coolant output by the thermostat through the small circulation are both input into the water pump; at this time, the EMS needs to control the switch valve to open (that is, p_target_bpv=on), open the warm air branch, so that the warm air branch participates in the coolant circulation; and the EMS needs to control the water pump to enter the second operating mode according to the engine operating conditions and the outlet water temperature, so that the engine enters the second heating mode. The second operating mode refers to the mode of adaptive adjustment of the water pump according to the engine operating conditions (including but not limited to engine speed and engine load conditions) and the outlet water temperature T1, specifically the operating condition adjustment mode corresponding to the second heating mode. The second operating mode here refers to the process of determining and controlling the target speed of the electronic water source based on the engine operating condition and the outlet water temperature in the second heating mode. For example, one speed can be determined based on the engine operating condition by querying the operating speed table corresponding to the second heating mode, and another speed can be determined based on the outlet water temperature by querying the temperature speed table corresponding to the second heating mode. The two speeds are then compared to determine the target speed so that the water pump can be controlled based on the target speed.

[0156] In this example, when the engine enters the second heating mode from the diversion mode, the coolant output by the water pump enters the cylinder body; the coolant in the cylinder body can be directly transmitted to the cylinder head, and then transmitted to the cylinder head through the supercharger; the coolant in the cylinder head can flow back to the water pump through the cylinder body and the thermostat, and then flow back to the water pump through the switch valve and the heater core. According to the engine operating conditions and the outlet water temperature, the water pump is controlled to enter the second operating mode, so that the engine enters the second heating mode Set_model=3.5. Since the temperature of the coolant in the engine is relatively high when the engine enters the second heating mode, it can meet the heating demand after passing through the heater core. Furthermore, the EMS can also send a blower permission signal to the air conditioning system HVAC so that the air conditioning system can control the blower to work. Specifically, the status bit Bit_HtqForb can be set to 0 and sent to the air conditioning system HVAC so that the air conditioning system HVAC starts the blower to work and ensure the heating effect.

[0157] In one embodiment, the engine operating conditions include engine speed and engine load;

[0158] Step S902, i.e., controlling the water pump to enter the second operating mode according to the engine operating condition and the outlet water temperature, includes:

[0159] (1) querying a second operating condition speed table based on the engine speed and the engine load to obtain a third speed;

[0160] (2) querying a fourth temperature-speed table based on the outlet water temperature of the engine to obtain a fourth speed;

[0161] (3) The larger value among the third speed, the fourth speed and the second calibrated speed is determined as the target speed, and the water pump is controlled to operate based on the target speed.

[0162] As an example, the EMS can obtain the engine speed and the engine load, query the preset second operating speed table based on the engine speed and the engine load, and obtain the third speed corresponding to the engine speed and the engine load from the second operating speed table. Among them, the first operating speed table is a three-dimensional mapping table used to reflect the corresponding relationship between the engine speed, the engine load and the water pump speed in the second heating mode, which can be represented by n_target_eng_ewp_M3. Accordingly, the third speed is the water pump speed determined by the table lookup to match the engine speed and the engine load.

[0163] As an example, the EMS can obtain the outlet water temperature T1 of the engine, query the pre-set fourth temperature and speed table based on the outlet water temperature T1, and obtain the fourth speed corresponding to the outlet water temperature T1 from the fourth temperature and speed table. The fourth temperature and speed table is a two-dimensional mapping table used to reflect the corresponding relationship between the outlet water temperature T1 and the water pump speed in the second heating mode, which can be represented by Map_n_target_T1_ewp_M3. Accordingly, the fourth speed is the water pump speed corresponding to the outlet water temperature T1 determined by the table lookup.

[0164] Among them, the second calibrated speed refers to the calibrated speed corresponding to the pre-calibrated first heating mode. The calibrated speed here is the speed required to control the rotation of the water pump. For example, the pre-calibrated second calibrated speed can be set to 50% of the maximum speed, which can provide a flow rate that supports warm air requirements.

[0165] As an example, after obtaining the third speed and the fourth speed from the table, the EMS can compare the third speed, the fourth speed and the second calibrated speed, and determine the larger value among the third speed, the fourth speed and the second calibrated speed as the target speed to ensure that the determined target speed can meet all requirements at the same time, and then control the water pump to work based on the target speed so that the engine enters the second heating mode. It can be understood that when the engine enters the second heating mode, the switch valve is opened, so that the warm air branch participates in the coolant circulation, and the hot water in the cylinder head can flow through the warm air core to provide the cylinder head with minimum heat dissipation; the thermostat enters the small cycle, and the hot water in the cylinder body flows back to the water pump to maintain a higher temperature, which has a better effect on maintaining the oil temperature. At this time, the water pump is controlled to work based on the larger value among the third speed, the fourth speed and the second calibrated speed, so that it matches the engine operating condition and the warm air demand, and meets the heat demand corresponding to the engine operating condition and the warm air demand.

[0166] In one embodiment, if Fig.10 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0167] S1001: When the engine is in the split mode or the second heating mode, obtaining the outlet water temperature of the engine;

[0168] S1002: If the outlet water temperature is greater than the sixth temperature threshold, the normal mode is determined as the target mode, the switch valve is controlled to be closed, and the water pump is controlled to enter the third operating mode according to the engine operating condition and the outlet water temperature, and the thermostat enters the small circulation state or the large circulation state.

[0169] Wherein, step S1001 is a specific implementation of step S201, and step S1002 is a specific implementation of step S202.

[0170] The sixth temperature threshold is a preset temperature threshold for evaluating whether to switch to the normal mode, which can be represented by Tth6. Generally speaking, the sixth temperature threshold Tth6 is greater than the fifth temperature threshold Tth5. The normal mode refers to the working mode in which the cylinder block and the cylinder head reach the normal working temperature and the temperature distribution is relatively uniform, which can be represented by Set_model=4.

[0171] As an example, in step S1001, when the engine is in the diversion mode Set_model=3 or the second heating mode Set_model=3.5, the EMS can obtain the outlet water temperature T1 of the engine, and compare the outlet water temperature T1 with the preset sixth temperature threshold, so as to determine whether the preset switching conditions corresponding to the normal mode are met based on the comparison result.

[0172] As an example, in step S1002, when the outlet water temperature is greater than the sixth temperature threshold (i.e., T1>Tth6), the EMS determines that the engine has completed the heat-up process as a whole, the cylinder block and the cylinder head have reached the normal operating temperature, and the temperature distribution is uniform. It can be determined that the preset switching conditions corresponding to the normal mode are met, and the normal mode is determined as the target mode. At this time, the thermostat adaptively adjusts the state, controls the switch valve to close, and controls the water pump to enter the third operating mode according to the engine operating conditions and the outlet water temperature, so that the engine enters the normal mode. The second operating mode refers to the mode of adaptive adjustment of the water pump according to the engine operating conditions (including but not limited to engine speed and engine load conditions) and the outlet water temperature T1, specifically the operating condition adjustment mode corresponding to the normal mode. The normal mode here refers to the working mode of closed-loop control according to the water temperature.

[0173] As an example, when the EMS needs to control the engine from the bypass mode Set_model=3 or the second heating mode Set_model=2.5 to the normal mode Set_model=4, the thermostat adaptively adjusts the opening ratio, that is, the thermostat adjusts itself based on its physical characteristics under the change of water temperature, and adjusts the opening ratio of the large cycle and the small cycle, so that the coolant output by the cylinder can be directly returned to the water pump through the small cycle, and can also be returned to the water pump through the radiator. At this time, the EMS controls the switch valve to close (that is, p_target_bpv=off), closes the warm air branch, so that the warm air branch does not participate in the coolant circulation, ensures that the warm air core does not bypass, so as to ensure that the radiator has enough coolant under high temperature conditions; and, the EMS needs to control the water pump to enter the third operating mode according to the engine operating conditions and the outlet water temperature, so as to adjust its target speed according to the outlet water temperature T1 and the engine operating conditions, so as to achieve adaptive adjustment. The third operating mode here refers to the process of determining and controlling the target speed of the electronic water source based on the engine operating condition and the outlet water temperature in the normal mode. For example, a speed can be determined by querying the operating speed table corresponding to the normal mode based on the engine operating condition, and the corresponding speed correction value can be determined by looking up the table based on the outlet water temperature. The speed correction value is then used to correct the above speed to determine the target speed so that the water pump can be controlled based on the target speed.

[0174] In this example, when the engine enters the normal mode from the bypass mode or the second heating mode, the coolant output by the water pump enters the cylinder body; the coolant in the cylinder body can be directly transmitted to the cylinder head and transmitted to the cylinder head through the supercharger; the coolant in the cylinder head flows back to the cylinder body, and then flows back to the water pump after the thermostat adaptively adjusts the opening ratio, entering the first operating mode, so that the engine enters the normal mode Set_model=4, so as to achieve the purpose of closed-loop control of the water temperature.

[0175] In one embodiment, the engine operating conditions include engine speed and engine load;

[0176] In steps S402, S502 and S1002, the water pump is controlled to enter the third operating mode according to the engine operating condition and the outlet water temperature, including:

[0177] (1) querying a first operating temperature table based on the engine speed and the engine load to obtain a first temperature;

[0178] (2) querying a third operating condition speed table based on the engine speed and the engine load to obtain a fifth speed;

[0179] (3) obtaining a target temperature difference based on the outlet water temperature of the engine and the first temperature;

[0180] (4) querying a fifth temperature-speed table based on the difference between the outlet water temperature of the engine and the target temperature to obtain a speed correction value;

[0181] (5) A target speed is determined based on the fifth speed and the speed correction value, and the water pump is controlled to operate based on the target speed.

[0182] As an example, the EMS can obtain the engine speed EngSpd and the engine load EngTorq, query the pre-set first operating temperature table based on the engine speed EngSpd and the engine load EngTorq, and obtain the first temperature corresponding to the engine speed EngSpd and the engine load EngTorq from the first operating temperature table. Among them, the first operating temperature table is a three-dimensional mapping table used to reflect the corresponding relationship between the engine speed, the engine load and the target water inlet temperature in the normal mode, which can be represented by Map_TempTarget_eng_M4. Correspondingly, the first temperature is the target water inlet temperature that matches the engine speed and the engine load determined by the table lookup, which can be represented by Target_temp_M4. The target water inlet temperature here is the water inlet temperature of the coolant in the engine that needs to be controlled under the engine operating conditions corresponding to the engine speed and the engine load.

[0183] As an example, the EMS can obtain the engine speed EngSpd and the engine load EngTorq, query the preset third operating speed table based on the engine speed EngSpd and the engine load EngTorq, and obtain the fifth speed corresponding to the engine speed EngSpd and the engine load EngTorq from the third operating speed table. The third operating speed table is a three-dimensional mapping table for reflecting the corresponding relationship between the engine speed, the engine load and the water pump speed in the normal mode, which can be represented by Map_pre_nTarget_ewp_M4. Accordingly, the fifth speed is the water pump speed matched with the engine speed and the engine load determined by the table lookup, which can be represented by Target_pre_nEWP_M4.

[0184] As an example, the EMS may obtain the outlet water temperature T1 of the engine, calculate the temperature difference between the outlet water temperature T1 and the first temperature Target_temp_M4, that is, determine the difference between the outlet water temperature T1 and the first temperature Target_temp_M4 as the target temperature difference, which may be expressed as Tdiff_M4, ie, Tdiff_M4 = T1 - Target_temp_M4.

[0185] As an example, the EMS can query the fifth temperature and speed table based on the outlet water temperature T1 and the target temperature difference Tdiff_M4 of the engine, and obtain the speed correction value corresponding to the outlet water temperature T1 and the target temperature difference Tdiff_M4 from the fifth temperature and speed table. Among them, the fifth temperature and speed table is a three-dimensional mapping table reflecting the corresponding relationship between the outlet water temperature T1, the target temperature difference and the speed correction value in the normal mode, which can be represented by ap_Pset_EWP_M4. Correspondingly, the speed correction value is the speed correction value matched with the outlet water temperature T1 and the target temperature difference Tdiff_M4 determined by the table lookup, which can be represented by P_mod_ewp_M4.

[0186] As an example, the EMS may use the speed correction value P_mod_ewp_M4 to correct the fifth speed arget_pre_nEWP_M4, specifically determine the sum of the speed correction value P_mod_ewp_M4 and the fifth speed arget_pre_nEWP_M4 as the target speed, and control the water pump to operate based on the target speed.

[0187] In this example, when the engine enters normal mode, the target speed needs to be dynamically adjusted based on the engine speed EngSpd, the engine load EngTorq and the engine outlet water temperature T1, and the water pump is controlled to operate based on the target speed, so that the water pump rotation is related to the engine operating conditions and the outlet water temperature T1, so as to achieve the purpose of water temperature closed-loop control.

[0188] In one embodiment, if Fig.11 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0189] S1101: When the engine is in a normal mode, obtaining an outlet water temperature and an air conditioning demand corresponding to the normal mode;

[0190] S1102: If the outlet water temperature is greater than the seventh temperature threshold and the air conditioning demand is for heating, the third heating mode is determined as the target mode, the switch valve is controlled to be closed, and the water pump is controlled to enter the speed adjustment condition according to the current speed of the water pump, and the thermostat enters the small circulation state or the large circulation state.

[0191] Among them, step S1101 is a specific implementation of step S201, and step S1102 is a specific implementation of step S202.

[0192] The seventh temperature threshold is a preset temperature threshold for evaluating whether it is necessary to switch to the third heating mode, which can be represented by Tth7. Generally speaking, the seventh temperature threshold Tth7 is greater than the sixth temperature threshold Tth6. The third heating mode is a mode for controlling the operation of the heater core to meet the heating demand. It is an operating mode after the normal mode and can be represented by Set_model=4.5.

[0193] As an example, in step S1101, when the engine is in normal mode Set_model=4, the EMS can obtain the engine outlet water temperature T1 collected in normal mode and the air conditioning demand sent by the air conditioning system HVAC, so as to evaluate whether it is necessary to enter the third heating mode based on the outlet water temperature T1 and the air conditioning demand.

[0194] As an example, in step S1102, when the outlet water temperature is greater than the seventh temperature threshold (i.e., T1>Tth7) and the air conditioning demand is a heating demand (Bit_heater=1), the EMS determines that the engine has completed the warm-up process as a whole, the cylinder block and the cylinder head have reached the normal operating temperature, and the distribution is uniform, and sufficient warm air can be provided by itself. In addition, the EMS analyzes and judges the air conditioning demand of the air conditioning system HVAC transmission process. When it is determined that the air conditioning demand is a heating demand, it can be determined that the preset switching conditions corresponding to the third heating mode are met, and the third heating mode is determined as the target mode. The engine needs to be controlled to enter the third heating mode, and its mode state bit is set to Set_model=4.5. Accordingly, when the outlet water temperature is not greater than the seventh temperature threshold, the EMS determines that the engine has not completed the warm-up process, cannot provide sufficient warm air, and will not switch to the third heating mode; or, when the air conditioning demand analyzed by the EMS is no heating demand (Bit_heater=0), there is no need to consider the warm air demand additionally, and the third heating mode will not be entered.

[0195] As an example, when the EMS needs to control the engine from the normal mode Set_model=4 to the third heating mode Set_model=4.5, the thermostat will adjust the state adaptively, that is, the thermostat will adjust itself based on its physical characteristics under the change of water temperature, and adjust the opening ratio of the large cycle and the small cycle, so that the coolant output by the cylinder can be directly returned to the water pump through the small cycle, that is, enter the small cycle state, and can also be returned to the water pump through the radiator, that is, enter the large cycle state. At this time, the EMS needs to control the switch valve to close (that is, p_target_bpv=off), close the warm air branch, so that the warm air branch does not participate in the coolant circulation, and ensure that the warm air core does not shunt, so as to ensure that the radiator has enough coolant under high temperature conditions. In addition, the EMS needs to perform adaptive speed adjustment according to the current speed of the water pump. For example, according to the actual situation, it is adjusted up or down based on the current speed to meet the cooling needs in the third heating mode.

[0196] In this example, when the engine enters the third heating mode from the normal mode, the coolant output by the water pump enters the cylinder body; the coolant in the cylinder body can be directly transmitted to the cylinder head and then transmitted to the cylinder head through the supercharger; the coolant in the cylinder head flows back to the cylinder body, and then flows back to the water pump after the thermostat adaptively adjusts the opening ratio. According to the current speed of the water pump, the water pump is controlled to enter the speed regulation condition, so that the engine enters the third heating mode Set_model=4.5. Since the temperature of the coolant in the engine is relatively high when the engine enters the third heating mode, it can meet the heating demand after passing through the heater core. Furthermore, the EMS can also send a blower permission signal to the air conditioning system HVAC so that the air conditioning system can control the blower to work. Specifically, the status bit Bit_HtqForb can be set to 0 and sent to the air conditioning system HVAC so that the air conditioning system HVAC starts the blower to work and ensure the heating effect.

[0197] In one embodiment, step S1102, controlling the water pump to enter a speed regulation state, includes:

[0198] The current speed of the water pump is obtained, the larger value of the current speed and the second calibrated speed is determined as the target speed, and the water pump is controlled to operate based on the target speed.

[0199] The current speed refers to the speed at which the water pump is currently running. The second calibrated speed refers to the speed that needs to be reached in the third heating mode that is preset.

[0200] As an example, when the EMS needs to control the engine to enter the third heating mode, it first obtains the current speed of the water pump, then compares the current speed with the second calibrated speed, determines the larger value of the current speed and the second calibrated speed as the target speed, and controls the water pump to work based on the target speed to meet the heating demand. In this example, the larger value of the current speed and the second calibrated speed is determined as the target speed to ensure that the coolant flow output by the water pump at the target speed can meet all demands at the same time.

[0201] In one embodiment, if Fig.12 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0202] S1201: When the engine is in the normal mode or the third heating mode, obtaining the outlet water temperature of the engine;

[0203] S1202: If the outlet water temperature is greater than the eighth temperature threshold, the overheating mode is determined as the target mode, the switch valve is controlled to be closed, the water pump is controlled to operate based on the third calibrated speed, and the thermostat enters the large circulation state.

[0204] Among them, step S1201 is a specific implementation of step S201, and step S1202 is a specific implementation of step S202.

[0205] Among them, the eighth temperature threshold is a pre-set temperature threshold for evaluating whether it is necessary to switch to the overheating mode, which is represented by Tth8. Generally speaking, the eighth temperature threshold Tth8 is greater than the seventh temperature threshold Tth7. The third calibrated speed refers to the pre-calibrated target speed for controlling the operation of the water pump. The third calibrated speed can be 100% of the maximum speed, that is, n_target_ewp = 100%, or other speeds close to the maximum speed. The overheating mode refers to a working mode in which the cylinder block and cylinder head are relatively high and there is a risk of overheating, which can be represented by Set_model = 5.

[0206] As an example, in step S1201, when the engine is in the normal mode Set_model=4 or the third heating mode Set_model=4.5, the EMS can obtain the outlet water temperature T1 of the engine, and compare the outlet water temperature T1 with the preset eighth temperature threshold, so as to determine whether the preset switching conditions corresponding to the normal mode are met based on the comparison result.

[0207] As an example, in step S1202, when the outlet water temperature T1 is greater than the eighth temperature threshold, the EMS determines that the engine as a whole has an overheating risk, and all the flow needs to be poured into the radiator to ensure sufficient cooling performance. At this time, it is determined that the preset switching conditions of the overheating mode are met, and the overheating mode can be determined as the target mode. At this time, the thermostat enters a large circulation state, that is, all the coolant output by the cylinder flows through the radiator and then flows back to the water pump. At this time, the EMS needs to control the switch valve to close (that is, p_target_bpv=off), close the warm air branch, so that the warm air branch does not participate in the coolant circulation, and ensure that the warm air core does not shunt, so as to ensure that the radiator has enough coolant under high temperature conditions; and the EMS needs to control the water pump to work based on the third calibrated speed, that is, n_target_ewp=100%, so that all the coolant output by the cylinder enters the water pump through the radiator, and the water pump works at the maximum speed to achieve a rapid heat dissipation and cooling effect.

[0208] In this example, when the engine enters the overheating mode from the normal mode or the third heating mode, the coolant output by the water pump enters the cylinder body; the coolant in the cylinder body can be directly transmitted to the cylinder head and transmitted to the cylinder head through the supercharger; the coolant in the cylinder head is completely poured into the radiator through the thermostat and then flows back to the water pump, so that the water pump works based on the third calibrated speed, and the engine enters the overheating mode Set_model=5, so as to achieve rapid heat dissipation and quickly reduce the temperature in the engine.

[0209] In one embodiment, if Fig.13 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0210] S1301: When the engine is in the current mode, obtain the engine speed and the vehicle status;

[0211] S1302: If the engine speed is zero and the vehicle is in the powered-on state, the heat preservation and waste heat utilization mode is determined as the target mode, and the outlet water temperature of the engine and the air conditioning demand are obtained;

[0212] S1303: If the outlet water temperature is greater than or equal to the warm air permissible threshold, the outlet water temperature is less than the first over-temperature threshold, and the air conditioning demand is a heating demand, the switch valve is controlled to open, the water pump is controlled to stop working, so that the engine enters the residual heat utilization state in the heat preservation and residual heat utilization mode, and the thermostat enters the small circulation state;

[0213] S1304: If the outlet water temperature is lower than the warm air allowable threshold, or the air conditioning demand is no heating demand, the switch valve is controlled to close, and the water pump is controlled to stop working, so that the engine enters the insulation state in the insulation and waste heat utilization mode, and the thermostat enters the small circulation state.

[0214] Among them, step S1301 is a specific implementation manner of step S201, and steps S1302 - S1304 are a specific implementation manner of step S202.

[0215] Among them, the allowable warm air threshold is a temperature threshold preset for evaluating whether there is sufficient waste heat for utilization, which can be represented by Tth9. The first over-temperature threshold is a threshold preset for evaluating whether there is an overheat risk, which can be represented by To1. The fourth calibrated speed is the speed at which the water pump needs to operate when controlling the engine to enter the waste heat utilization state. As an example, the fourth calibrated speed can be set to 0. The heat preservation and waste heat utilization mode is a mode for realizing the functions of waste heat utilization or heat preservation, which can be represented by Set_model = 6.

[0216] As an example, when the engine is in the current mode, that is, in other modes except the heat preservation and waste heat utilization mode, the EMS obtains the engine speed and the vehicle state, so as to evaluate whether the preset switching conditions of the heat preservation and waste heat utilization mode are met according to the engine speed and the vehicle state.

[0217] As an example, when the engine speed is zero and the vehicle state is the powered-on state (such as B_start = 1), the EMS can determine that the vehicle is in the start-stop during the hybrid process, the vehicle power demand is low or the battery level is high, and there is no need to control the engine to start. It is determined that it meets the preset switching conditions corresponding to the heat preservation and waste heat utilization mode Set_model = 6, and the heat preservation and waste heat utilization mode is determined as the target mode. It is necessary to obtain the outlet water temperature T1 of the engine and the air-conditioning demand in real time, so as to control the on-off valve and the water pump according to the outlet water temperature T1 and the air-conditioning demand.

[0218] As an example, when the EMS determines that the preset switching conditions corresponding to the heat preservation and waste heat utilization mode are met, it can compare the obtained outlet water temperature T1 with the allowable warm air threshold and the first over-temperature threshold. If the outlet water temperature is greater than or equal to the allowable warm air threshold and the outlet water temperature is less than the first over-temperature threshold, that is, Tth9 ≤ T1 < To1, it is determined that there is sufficient waste heat inside the engine for utilization and there is no overheat risk. At this time, the waste heat utilization scenario can be considered. At this time, if the air-conditioning demand sent by the air-conditioning system is for heating demand, the on-off valve can be controlled to open (that is, the target opening degree p_target_bpv of the on-off valve is set to on), so that the thermostat enters the small cycle state, and the coolant output from the cylinder block is directly returned to the water pump through the thermostat. At this time, the EMS needs to control the water pump to stop working, so that the engine enters the waste heat utilization state in the heat preservation and waste heat utilization mode, and the hot water inside the engine can be taken out through the heater core for heating to achieve the purpose of waste heat utilization.

[0219] As an example, when the EMS determines that the preset switching condition corresponding to the heat preservation and waste heat utilization mode is met, it can compare the obtained outlet water temperature T1 with the warm air allowable threshold and the first over-temperature threshold. If the outlet water temperature is less than the warm air allowable threshold (i.e., T1 < Tth9), it is determined that there is not enough waste heat inside the engine for utilization. At this time, the waste heat utilization scenario cannot be considered. Or, when the EMS receives that the air-conditioning demand sent by the air-conditioning system is no heating demand, the waste heat utilization scenario does not need to be considered either. That is to say, when the outlet water temperature is less than the warm air allowable threshold or the air-conditioning demand is no heating demand, the EMS determines that there is no waste heat utilization scenario. At this time, the thermostat enters the small cycle state, the switch valve can be controlled to close, and the water pump is controlled to stop working, so that the entire engine cooling system stops heat exchange, and the engine enters the heat preservation state in the heat preservation and waste heat utilization mode.

[0220] In one embodiment, as Fig.14 shown, a control method for an engine cooling system is provided, which can be applied in a controller. The control method includes:

[0221] S1401: When the engine is in the current mode, obtain the engine speed, vehicle state, and outlet water temperature of the engine corresponding to the current mode;

[0222] S1402: If the engine speed is zero, the vehicle state is the powered-on state, and the outlet water temperature is greater than or equal to the first over-temperature threshold, determine the post-start and stop operation mode as the target mode, and control the switch valve and the water pump to enter the first post-operation mode according to the outlet water temperature.

[0223] Among them, step S1401 is a specific implementation manner of step S201, and step S1402 is a specific implementation manner of step S202.

[0224] As an example, when the engine is in the current mode, that is, in other modes other than the post-start and stop operation mode, the EMS obtains the engine speed, vehicle state, and outlet water temperature of the engine, so as to evaluate whether the preset switching condition of the post-start and stop operation mode is met according to the engine speed, vehicle state, and outlet water temperature. The post-start and stop operation mode refers to the operation mode after the engine starts and stops, and can be represented by Set_model = 7.

[0225] As an example, when the engine speed is zero, the vehicle is in the power-on state, and the outlet water temperature is greater than or equal to the first over-temperature threshold, the EMS can determine that the vehicle is in the start-stop period of the hybrid process, the vehicle power demand is low or the power is high, and it is determined that it meets the preset switching conditions corresponding to the post-start-stop operation mode Set_model=7, and the post-start-stop operation mode is determined as the target mode. The outlet water temperature T1 of the engine needs to be obtained in real time to determine the target operation state after start-stop, so as to control the opening or closing of the switch valve, the thermostat to adjust the state adaptively, and control the water pump to make the engine enter the target operation state of the post-start-stop operation mode. In this example, when it is determined that the evaluation conditions corresponding to the post-start-stop operation mode are met, the corresponding target operation state can be evaluated according to the outlet water temperature T1, and then the switch valve, thermostat and water pump can be controlled to make corresponding adjustments so that the engine enters the target operation state of the post-start-stop operation mode.

[0226] In one embodiment, in step S1402, according to the outlet water temperature, controlling the switch valve and the water pump to enter the first post-operation mode includes:

[0227] (1) if the outlet water temperature is greater than or equal to the first over-temperature threshold and the outlet water temperature is less than the second over-temperature threshold, the switch valve is controlled to be closed, a sixth temperature-speed table is queried based on the outlet water temperature and the ambient temperature to obtain a target speed, the water pump is controlled to operate based on the target speed, and the thermostat is not started, so that the engine enters the first operating state of the post-start-stop operating mode;

[0228] (2) if the outlet water temperature is greater than or equal to the second over-temperature threshold and the outlet water temperature is less than the third over-temperature threshold, the switch valve is controlled to open, the seventh temperature speed table is queried based on the outlet water temperature and the ambient temperature to obtain the target speed, the water pump is controlled to operate based on the target speed, and the thermostat is not started, so that the engine enters the second operating state of the post-start-stop operating mode;

[0229] (3) If the outlet water temperature is greater than or equal to the third over-temperature threshold, the switch valve is controlled to open, and the eighth temperature and speed table is queried based on the outlet water temperature and the ambient temperature to obtain the target speed. The water pump is controlled to operate based on the target speed, and the thermostat enters the large circulation state, so that the engine enters the third operating state of the start-stop post-operation mode.

[0230] The first over-temperature threshold, the second over-temperature threshold and the third over-temperature threshold are pre-set thresholds for evaluating overheating risks, which can be represented by To1, To2 and To3 respectively, wherein the first over-temperature threshold is less than the second over-temperature threshold, and the second over-temperature threshold is less than the third over-temperature threshold, that is, To1 <To2<To3。

[0231] As an example, after the engine speed, vehicle state, and outlet water temperature meet the preset switching conditions corresponding to the operating mode after start-stop, the EMS determines the operating mode after start-stop as the target mode. The outlet water temperature can be compared with the first over-temperature threshold, the second over-temperature threshold, and the third over-temperature threshold, so as to determine the target operating state that the engine needs to be controlled to enter according to the comparison result.

[0232] As an example, when the outlet water temperature is greater than or equal to the first over-temperature threshold and less than the second over-temperature threshold, that is, when To1 ≤ T1 < To2, the EMS determines that the coolant inside the engine needs to circulate, that is, the coolant demand circulates inside the cylinder block, cylinder head, and supercharger. However, the overall risk is low and does not reach the opening condition for the thermostat to work. At this time, the target operating state is determined as the first operating state. At this time, the thermostat does not start, the control switch valve is closed, the sixth temperature tachometer is queried based on the outlet water temperature and the ambient temperature to obtain the target speed, and the water pump is controlled to work based on the target speed, so that the engine enters the first operating state of the operating mode after start-stop, that is, the operating state of the internal circulation of the cylinder block, cylinder head, and supercharger. Among them, the sixth temperature tachometer refers to a three-dimensional mapping table based on the relationship between the outlet water temperature T1, the ambient temperature T_amb, and the water pump speed in the first operating state of the operating mode after start-stop. The first operating state refers to the operating state in which the coolant circulates inside the engine.

[0233] As an example, when the outlet water temperature is greater than or equal to the second over-temperature threshold and less than the third over-temperature threshold, that is, when To2 ≤ T1 < To3, the EMS determines that the coolant inside the engine needs to circulate, that is, the coolant demand circulates inside the cylinder block, cylinder head, and supercharger. However, the overall risk is medium and does not reach the opening condition for the thermostat to work. At this time, the target operating state is determined as the second operating state, the control switch valve is opened, the thermostat does not start, the seventh temperature tachometer is queried based on the outlet water temperature and the ambient temperature to obtain the target speed, and the water pump is controlled to work based on the target speed, so that the engine enters the second operating state of the operating mode after start-stop to achieve the heat exchange requirement by low-grade heat exchange through the heater core. Among them, the seventh temperature tachometer refers to a three-dimensional mapping table based on the relationship between the outlet water temperature T1, the ambient temperature T_amb, and the water pump speed in the second operating state of the operating mode after start-stop. The second operating state refers to the operating state in which the coolant circulates inside the engine and exchanges heat through the heater core.

[0234] As an example, when the outlet water temperature is greater than or equal to the third over-temperature threshold, that is, T1≥To3, the EMS determines that the coolant inside the engine needs to circulate, and the overall risk is high, reaching the start-up conditions for the thermostat. At this time, the target operating state is determined to be the third operating state, the switch valve is controlled to open, the thermostat enters the large circulation state, and the eighth temperature tachometer is queried based on the outlet water temperature and the ambient temperature to obtain the target speed. The water pump is controlled to work based on the target speed so that the engine enters the third operating state of the post-start-stop operating mode, so that all coolant in the post-start-stop operating mode is dissipated through the radiator, which helps to reduce the risk of overheating. Among them, the eighth temperature tachometer refers to a three-dimensional mapping table based on the relationship between the outlet water temperature T1, the ambient temperature Tamb and the water pump speed in the third operating state of the post-start-stop operating mode. The third operating state refers to the operating state in which the coolant circulates inside the engine and exchanges heat through the heater core.

[0235] In one embodiment, if Fig.15 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0236] S1501: When the engine is in the current mode, obtaining the engine speed, vehicle status, and engine outlet water temperature corresponding to the current mode;

[0237] S1502: If the engine speed is zero, the vehicle is in a power-off state, and the outlet water temperature is greater than or equal to the first overtemperature threshold, the hybrid overheating post-operation mode is determined as the target mode, and the water pump and the switch valve are controlled to enter the second post-operation mode according to the outlet water temperature.

[0238] Among them, step S1501 is a specific implementation of step S201, and step S1502 is a specific implementation of step S202.

[0239] As an example, when the engine is in the current mode, the EMS obtains the engine speed, the vehicle status and the outlet water temperature of the engine, so as to evaluate whether the preset switching conditions of the hybrid overheating operation mode are met according to the engine speed, the vehicle status and the outlet water temperature. The hybrid overheating operation mode refers to the operation mode after the engine is hybridized, which can be represented by Set_model=8.

[0240] As an example, when the engine speed is zero, the vehicle is in the power-off state, and the outlet water temperature is greater than or equal to the first over-temperature threshold, the EMS can determine that the vehicle has been shut down and is ready to be powered off. The EMS still has the final post-operation processing time, which has a maximum limit and generally does not exceed 300s. When the vehicle is in the power-off state, there is no power source for charging. If the post-operation processing time is long, it is easy to cause power loss, so the post-operation time needs to be constrained.

[0241] It can be determined that during the start-stop period of the vehicle in the hybrid process, the vehicle power demand is low or the power is high, and it is determined that it meets the preset switching conditions corresponding to the hybrid overheat post-operation mode Set_model=8. The outlet water temperature T1 of the engine needs to be obtained in real time, so that according to the outlet water temperature T1, the switch valve and the water pump are controlled to enter the second post-operation mode to make the engine enter the hybrid overheat post-operation mode. In this example, when it is determined that the evaluation state corresponding to the start-stop post-operation mode is met, the switch valve and the water pump can be controlled to make corresponding adjustments according to the outlet water temperature T1, so that the engine enters the hybrid overheat post-operation mode, so as to limit the post-operation processing time and avoid power loss.

[0242] In one embodiment, in step S1502, according to the outlet water temperature, controlling the water pump and the switch valve to enter the second post-operation mode includes:

[0243] (1) querying a ninth temperature speed table and a second temperature operation time table based on the outlet water temperature of the engine to obtain a target speed and a first operation duration;

[0244] (2) querying the first temperature opening table and the third temperature operation time table based on the outlet water temperature of the engine to obtain the target opening and the second operation time;

[0245] (3) controlling the water pump to operate based on the target speed, and when it is detected that the operating time of the water pump reaches a first operating time, controlling the water pump to stop operating;

[0246] (4) The on-off valve is controlled to open to a target opening, and when it is detected that the valve opening time reaches a second operating time, the on-off valve is controlled to reset.

[0247] As an example, the EMS may query the ninth temperature speed table pre-set based on the outlet water temperature T1 of the engine, and obtain the target speed corresponding to the outlet water temperature T1 from the ninth temperature speed table. The ninth temperature speed table refers to a two-dimensional mapping table pre-configured to reflect the corresponding relationship between the outlet water temperature T1 and the water pump speed in the hybrid overheating post-operation mode, which can be represented by Map_aftrun_nEWP_M8, and accordingly, the target speed obtained by the table query can be represented by n_target_ewp. In addition, the EMS may query the second temperature operation schedule pre-set based on the outlet water temperature T1 of the engine, and obtain the running time corresponding to the outlet water temperature T1 from the second temperature operation schedule, and determine it as the first running time. The second temperature operation schedule refers to a two-dimensional mapping table pre-set to reflect the corresponding relationship between the outlet water temperature T1 and the running time in the hybrid overheating post-operation mode, which can be represented by Map_aftrun_tEWP_M8, and accordingly, the first running time obtained by the table query can be represented by t_target_ewp.

[0248] As an example, the EMS may query the preset first temperature opening table based on the outlet water temperature T1 of the engine, and obtain the target opening corresponding to the outlet water temperature T1 from the first temperature opening table. The first temperature opening table refers to a two-dimensional mapping table pre-configured to reflect the corresponding relationship between the outlet water temperature T1 and the valve opening of the switch valve in the hybrid overheating post-operation mode, which can be represented by Map_aftrun_pBPV_M8. In addition, the EMS may query the preset third temperature operation schedule based on the outlet water temperature T1 of the engine, and obtain the operating time corresponding to the outlet water temperature T1 from the third temperature operation schedule, and determine it as the second operating time. The third temperature operation schedule refers to a two-dimensional mapping table pre-set to reflect the corresponding relationship between the outlet water temperature T1 and the operating time in the hybrid overheating post-operation mode, which can be represented by Map_aftrun_pBPV_M8, and accordingly, the second operating time obtained by the table query can be represented by t_target_bpv.

[0249] As an example, the EMS can control the water pump to operate based on the target speed, monitor the water pump running time in real time, and control the water pump to stop working when the water pump running time reaches the first running time; during the temperature change process, the target opening of the switch valve changes with the water temperature, and the switch valve can be controlled to open to the target opening, and the valve opening time is monitored in real time. When the valve opening time reaches the second running time, the switch valve can be controlled to reset, and the entire vehicle completes the power-off action.

[0250] In one embodiment, if Fig.16 As shown, a control method for an engine cooling system is provided, which can be applied in a controller, and the control method includes:

[0251] S1601: When the engine is in the current mode, obtaining an air conditioning demand and a target demand corresponding to the switch valve;

[0252] S1602: If the air conditioning demand is cooling demand, the switch valve is controlled to be closed;

[0253] S1603: If the air conditioning demand is no cooling demand, a target opening is determined based on the current demand and target demand of the switch valve, and the switch valve is controlled to open to the target opening.

[0254] Among them, step S1501 is a specific implementation of step S201, and step S1502 is a specific implementation of step S202.

[0255] As an example, when the engine is in the current mode, which can be any mode, the EMS can obtain the air-conditioning demand sent by the air-conditioning system HAVC and the target demand for the switch valve sent by other systems. The target demand here can be understood as the demand for controlling the opening degree of the switch valve.

[0256] As an example, when EMS receives air conditioning demand and analyzes the air conditioning demand to determine that it is a cooling demand, it must first close the switch valve to prevent heat from flowing through the warm air core and affecting the pipes through heat radiation and convection, thereby affecting the cooling effect. In this example, the switch valve can be used to actively cut off the warm air branch to prevent the warm air flow from affecting the cooling effect under air conditioning cooling conditions.

[0257] As an example, when the EMS does not receive an air-conditioning demand, or receives an air-conditioning demand but the air-conditioning demand is for no cooling, it can receive a target demand sent by other systems, merge the target demand with the current demand of the switch valve, take the maximum value, determine the target opening corresponding to the maximum value, and then control the switch valve to open to the target opening.

[0258] The engine cooling system provided in this example has built a thermal management architecture that is compatible with multiple modes and solves market pain points. In addition to the conventional operating mode, its main innovative modes are: 1. When the thermostat is in a self-adjusting state, the outlet water temperature is collected through the temperature sensor to achieve different controls on the switch valve and water pump, thereby achieving control and switching in multiple functional modes at a low cost. 2. This solution cleverly uses the warm air core as a radiator for low-grade heat dissipation, as a transition between the small cycle and large cycle modes of the thermostat, so that the design of the thermostat delaying the initial opening of the radiator becomes possible. By increasing the initial opening temperature of the thermostat, the wall temperature and oil temperature in the cylinder can be increased, which has an improvement effect on reducing the viscosity of the oil and achieving low friction; in this mode, it is equivalent to achieving a certain degree of diversion effect between the cylinder block and the cylinder head through the switch valve. 3. The supercharger takes water from the cylinder block, and then flows all the way up to the cylinder head, eliminating the overflow pipe. 4. During shutdown and hot soak, the heater core and radiator can be operated in the second gear based on different water temperature conditions, for example, the operation mode after start-stop and the operation mode after hybrid overheating can be switched. 5. The system can actively cut off the warm air branch through the switch valve. Under the condition of air conditioning and cooling, the warm air flow is prevented from affecting the cooling effect. No additional valve is required, which helps save costs.

[0259] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0260] In one embodiment, a controller is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the engine cooling system control method in the above embodiment is implemented, for example Figure 2 Steps S201 to S202 are shown and will not be described again here to avoid repetition.

[0261] In one embodiment, a vehicle is provided, comprising the engine cooling system in the above embodiment, or comprising the above controller, the controller can implement the engine cooling system control method in the above embodiment, for example Figure 2 Steps S201 to S202 are shown and will not be described again here to avoid repetition.

[0262] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the engine cooling system control method in the above embodiment is implemented, for example Figure 2 Steps S201 to S202 are shown and will not be described again here to avoid repetition.

[0263] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0264] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0265] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An engine cooling system, characterized in that: Including cylinder block, cylinder head, water pump, heating branch and temperature control branch; The cylinder body and the cylinder head cooperate to form a cylinder circulation branch; The warm air branch is arranged between the first outlet of the cylinder cover and the inlet of the water pump, and comprises a switch valve and a warm air core body arranged in series; The temperature control branch includes a thermostat, the inlet of the thermostat is connected to the first outlet of the cylinder, and the outlet of the thermostat is connected to the inlet of the water pump; The outlet of the water pump is connected to the first inlet of the cylinder body.

2. The engine cooling system according to claim 1, characterized in that: The temperature control branch further comprises a radiator, one end of the radiator is connected to the outlet of the thermostat, and the other end of the radiator is connected to the inlet of the water pump.

3. The engine cooling system according to claim 1, characterized in that: The engine cooling system further comprises a controller, which is connected to the switch valve and the water pump and is used for controlling the operation of the switch valve and the water pump.

4. The engine cooling system according to claim 1, characterized in that: The engine cooling system further comprises a first temperature sensor, which is arranged at the first outlet of the cylinder body and is used to collect the outlet water temperature; The controller is connected to the first temperature sensor, and is used to control the operation of the switch valve and the water pump according to the outlet water temperature sent by the first temperature sensor.

5. The engine cooling system according to claim 1, characterized in that: The engine cooling system further includes a supercharger, wherein an inlet of the supercharger is connected to the second outlet of the cylinder block, and an outlet of the supercharger is connected to an inlet of the cylinder head.

6. The engine cooling system according to claim 1, characterized in that: The cylinder cover is provided with an overflow port; The engine cooling system further comprises an expansion water tank, an inlet of the expansion water tank is connected to the overflow port, and an outlet of the expansion water tank is connected to an inlet of the water pump.

7. The engine cooling system according to claim 1, characterized in that: The engine cooling system further comprises an oil cooler, one end of the oil cooler is connected to the third outlet of the cylinder block, and the other end of the oil cooler is connected to the second inlet of the cylinder block.

8. The engine cooling system according to claim 1, characterized in that: The water pump is an electronic water pump.

9. The engine cooling system according to claim 1, characterized in that: The cylinder circulation branch includes a first pipe and a second pipe connected between the cylinder block and the cylinder head.

10. A method for controlling an engine cooling system, characterized in that: Applicable to the engine cooling system according to any one of claims 1 to 9, comprising: When the engine is in the current mode, the measured data is obtained; If the measured data meets the preset switching conditions, the switchable mode corresponding to the preset switching conditions is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, the water pump is controlled to operate based on the target speed corresponding to the target mode, and the thermostat is adaptively adjusted.

11. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in start mode, obtain the engine speed; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the engine speed is not zero, the pre-processing mode is determined as the target mode, the switch valve is controlled to be closed, the water pump is controlled to operate based on the first calibrated speed, and the thermostat enters a small circulation state.

12. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in pre-treatment mode, obtain the flameout interval time; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the flameout interval is less than the first time threshold, the normal mode is determined as the target mode, the switch valve is controlled to be closed, and the water pump is controlled to enter the third operating mode according to the engine operating condition and the outlet water temperature, and the thermostat enters the small circulation state or the large circulation state; If the flameout interval is not less than the first time threshold, the first heat engine mode is determined as the target mode, the switch valve is controlled to be closed, the water pump is controlled to enter the intermittent working mode, and the thermostat enters the small circulation state.

13. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the pretreatment mode, obtaining the outlet water temperature of the engine; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If at least one of the outlet water temperatures obtained within the preset time is greater than the first temperature threshold, the normal mode is determined as the target mode, the switch valve is controlled to be closed, and the water pump is controlled to enter the third operating mode according to the engine operating condition and the outlet water temperature, and the thermostat enters the small circulation state or the large circulation state; If all the outlet water temperatures obtained within the preset time are not greater than the first temperature threshold, the first heat engine mode is determined as the target mode, the switch valve is controlled to be closed, the water pump is controlled to enter the intermittent working mode, and the thermostat enters the small circulation state.

14. The engine cooling system control method according to claim 12 or 13, characterized in that: The controlling the water pump to enter the intermittent working mode comprises: Based on the outlet water temperature of the engine, the first temperature speed table, the first temperature operation time table and the first temperature stop time table are queried to obtain the target speed, the target operation time and the target stop time respectively; Controlling the water pump to operate based on the target speed and monitoring the running time of the water pump; When the running time of the water pump reaches the target running time, controlling the water pump to stop working and monitoring the current stop time; When the current stop time reaches the target stop time, the water pump is repeatedly controlled to operate based on the target speed and the running time of the water pump is monitored.

15. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the first heating mode, obtaining the outlet water temperature of the engine; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the outlet water temperature is greater than the second temperature threshold, the second heat engine mode is determined as the target mode, the switch valve is controlled to be closed, and based on the outlet water temperature of the engine, the water pump is controlled to enter a low flow working mode and the thermostat enters a small circulation state.

16. The engine cooling system control method according to claim 15, characterized in that: The step of controlling the water pump to enter a low flow working mode based on the outlet water temperature of the engine comprises: The second temperature-speed table is queried based on the outlet water temperature of the engine to obtain the target speed, and the water pump is controlled to operate based on the target speed.

17. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the second heating mode, obtaining the outlet water temperature and air conditioning demand of the engine; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the outlet water temperature is greater than the third temperature threshold and the air conditioning demand is for heating, the first heating mode is determined as the target mode, the switch valve is controlled to open, the water pump is controlled to operate based on the second calibrated speed, and the thermostat enters a small circulation state.

18. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the second heating mode or the first heating mode, obtaining the outlet water temperature of the engine; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the outlet water temperature is greater than the fourth temperature threshold, the diversion mode is determined as the target mode, the switch valve is controlled to open, and according to the engine operating condition and the outlet water temperature, the water pump is controlled to enter the first operating mode and the thermostat enters the small circulation state.

19. The engine cooling system control method according to claim 18, characterized in that: The engine operating conditions include engine speed and engine load; The step of controlling the water pump to enter the first operating mode according to the engine operating condition and the outlet water temperature includes: Based on the engine speed and the engine load, query a first operating condition speed table to obtain a first speed; querying a third temperature-speed table based on the outlet water temperature of the engine to obtain a second speed; A larger value between the first speed and the second speed is determined as a target speed, and the water pump is controlled to operate based on the target speed.

20. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the split mode, obtain the outlet water temperature and air conditioning demand of the engine; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the outlet water temperature is greater than the fifth temperature threshold and the air conditioning demand is for heating, the second heating mode is determined as the target mode, the switch valve is controlled to open, and according to the engine operating condition and the outlet water temperature, the water pump is controlled to enter the second operating mode and the thermostat enters the small circulation state.

21. The engine cooling system control method according to claim 20, characterized in that: The engine operating conditions include engine speed and engine load; The step of controlling the water pump to enter the second operating mode according to the engine operating condition and the outlet water temperature includes: Based on the engine speed and the engine load, query a second operating condition speed table to obtain a third speed; querying a fourth temperature-speed table based on the outlet water temperature of the engine to obtain a fourth speed; A larger value among the third speed, the fourth speed and the second calibrated speed is determined as a target speed, and the water pump is controlled to operate based on the target speed.

22. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the split mode or the second heating mode, obtaining the outlet water temperature of the engine; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the outlet water temperature is greater than the sixth temperature threshold, the normal mode is determined as the target mode, the switch valve is controlled to be closed, and the water pump is controlled to enter the third operating mode and the thermostat enters the small circulation state or the large circulation state according to the engine operating condition and the outlet water temperature.

23. The engine cooling system control method according to claim 12, 13 or 22, characterized in that: The engine operating conditions include engine speed and engine load; The step of controlling the water pump to enter the third operating mode according to the engine operating condition and the outlet water temperature includes: Based on the engine speed and the engine load, query a first operating temperature table to obtain a first temperature; querying a third operating condition speed table based on the engine speed and the engine load to obtain a fifth speed; Based on the outlet water temperature of the engine and the first temperature, obtaining a target temperature difference; Based on the outlet water temperature of the engine and the target temperature difference, a fifth temperature-speed table is searched to obtain a speed correction value; A target speed is determined according to the fifth speed and the speed correction value, and the water pump is controlled to operate based on the target speed.

24. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in normal mode, the outlet water temperature and air conditioning demand corresponding to the normal mode are obtained; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the outlet water temperature is greater than the seventh temperature threshold and the air-conditioning demand is for heating, the third heating mode is determined as the target mode, the switch valve is controlled to be closed, and the water pump is controlled to enter the speed regulation condition according to the current speed of the water pump, and the thermostat enters the small circulation state or the large circulation state.

25. The engine cooling system control method according to claim 24, characterized in that: According to the current speed of the water pump, controlling the water pump to enter the speed regulation state includes: The current rotation speed of the water pump is obtained, the larger value of the current rotation speed and the second calibrated rotation speed is determined as the target rotation speed, and the water pump is controlled to operate based on the target rotation speed.

26. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the normal mode or the third heating mode, obtaining the outlet water temperature of the engine; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the outlet water temperature is greater than the eighth temperature threshold, the overheating mode is determined as the target mode, the switch valve is controlled to be closed, the water pump is controlled to operate based on the third calibrated speed, and the thermostat enters a large circulation state.

27. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the current mode, obtain the engine speed and vehicle status; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the engine speed is zero and the vehicle is in a powered-on state, the heat preservation and waste heat utilization mode is determined as the target mode, and the outlet water temperature of the engine and the air conditioning demand are obtained; If the outlet water temperature is greater than or equal to the warm air permissible threshold, the outlet water temperature is less than the first over-temperature threshold, and the air conditioning demand is a heating demand, the switch valve is controlled to open, the water pump is controlled to stop working, so that the engine enters the waste heat utilization state in the heat preservation and waste heat utilization mode, and the thermostat enters the small circulation state; If the outlet water temperature is lower than the warm air allowable threshold, or the air conditioning demand is no heating demand, the switch valve is controlled to close and the water pump is controlled to stop working, so that the engine enters the insulation state in the insulation and waste heat utilization mode, and the thermostat enters the small circulation state.

28. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the current mode, the engine speed, vehicle status and engine outlet water temperature corresponding to the current mode are obtained; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the engine speed is zero, the vehicle state is in the power-on state, and the outlet water temperature is greater than or equal to the first over-temperature threshold, the post-start-stop operation mode is determined as the target mode, the thermostat is not started or enters the large circulation state, and the switch valve and the water pump are controlled to enter the first post-operation mode according to the outlet water temperature.

29. The engine cooling system control method according to claim 28, characterized in that: According to the outlet water temperature, the switch valve, the thermostat and the water pump are controlled to enter the first post-operation mode, including: If the outlet water temperature is greater than or equal to the first over-temperature threshold, and the outlet water temperature is less than the second over-temperature threshold, the switch valve is controlled to be closed, a sixth temperature-speed table is queried based on the outlet water temperature and the ambient temperature to obtain a target speed, the water pump is controlled to operate based on the target speed, and the thermostat is not started, so that the engine enters the first operating state of the post-start-stop operating mode; If the outlet water temperature is greater than or equal to the second over-temperature threshold, and the outlet water temperature is less than the third over-temperature threshold, the switch valve is controlled to open, a seventh temperature-speed table is queried based on the outlet water temperature and the ambient temperature to obtain a target speed, the water pump is controlled to operate based on the target speed, and the thermostat is not started, so that the engine enters the second operating state of the post-start-stop operating mode; If the outlet water temperature is greater than or equal to the third over-temperature threshold, the switch valve is controlled to open, and the eighth temperature and speed table is queried based on the outlet water temperature and the ambient temperature to obtain the target speed. The water pump is controlled to operate based on the target speed, so that the engine enters the third operating state of the start-stop post-operating mode, and the thermostat enters the large circulation state.

30. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the current mode, the engine speed, vehicle status and engine outlet water temperature corresponding to the current mode are obtained; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the engine speed is zero, the vehicle state is in the power-off state, and the outlet water temperature is greater than or equal to the first overtemperature threshold, the hybrid overheating post-operation mode is determined as the target mode, and the water pump and the switch valve are controlled to enter the second post-operation mode according to the outlet water temperature.

31. The engine cooling system control method according to claim 30, characterized in that: According to the outlet water temperature, controlling the water pump and the switch valve to enter the second post-operation mode includes: Based on the outlet water temperature of the engine, a ninth temperature speed table and a second temperature operation time table are queried to obtain a target speed and a first operation duration; Based on the outlet water temperature of the engine, query the first temperature opening table and the third temperature operation time table to obtain the target opening and the second operation time; Controlling the water pump to operate based on the target speed, and when it is monitored that the operating time of the water pump reaches the first operating time, controlling the water pump to stop operating; The switch valve is controlled to open to the target opening, and when it is monitored that the valve opening time reaches the second operating time, the switch valve is controlled to reset.

32. The engine cooling system control method according to claim 10, characterized in that: When the engine is in the current mode, obtaining the measured data includes: When the engine is in the current mode, the air conditioning demand and the target demand corresponding to the switch valve are obtained; If the measured data satisfies the preset switching condition, the switchable mode corresponding to the preset switching condition is determined as the target mode, the switch valve is controlled to operate based on the target opening corresponding to the target mode, and the water pump is controlled to operate based on the target speed corresponding to the target mode, including: If the air conditioning demand is a cooling demand, the switch valve is controlled to be closed; If the air-conditioning demand is no cooling demand, a target opening is determined based on the current demand of the switch valve and the target demand, and the switch valve is controlled to open to the target opening.

33. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the engine cooling system control method according to any one of claims 10 to 32 is implemented.

34. A car, characterized in that: Includes the engine cooling system as described in any one of claims 1-9, or includes the controller as described in claim 33.

35. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the engine cooling system control method according to any one of claims 10 to 32 is implemented.

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