Control methods, devices, vehicles and storage media for engine cooling systems

Abstract

This application relates to a control method, device, vehicle, and storage medium for an engine cooling system. A pressure detection component is installed at the exhaust pipe of the engine cooling system. The method includes: when the current coolant temperature of the engine cooling system is lower than a first preset coolant temperature, if the current engine speed is lower than a first preset speed, and the difference between the current pressure value detected by the pressure detection component and the pressure value at the previous moment is less than a first preset pressure value, then controlling the speed of the electronic water pump in the current engine cooling system to a second preset speed; otherwise, controlling the speed of the electronic water pump in the current engine cooling system to a third preset speed, wherein the third preset speed is greater than the second preset speed. This reduces the power consumption of the electronic water pump while avoiding the problem of coolant boiling affecting the reliability of the cooling system.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a control method, device, vehicle, and storage medium for an engine cooling system. Background Technology

[0002] Currently, engine cooling systems with electric water pumps generally employ a cooling strategy controlled by an ECU (Electronic Control Unit). The ECU controls the speed of the electric water pump via electrical signals, while temperature sensors are located within the engine cooling channels to detect the actual water temperature and transmit the data to the ECU. The ECU stores preset water temperature-electric water pump speed control strategies. Based on different input water temperatures, the ECU transmits different electrical signals to the electric water pump to adjust its speed. Generally, when the water temperature is low, the electric water pump operates intermittently or at a low speed; while when the water temperature is high, the electric water pump operates at a high speed to enhance the cooling effect. Based on this strategy, the electric water pump can operate in a low-power state, thereby reducing fuel consumption.

[0003] However, due to the complex structure of the engine cooling system, it is difficult to place the temperature sensor at the location with the highest water temperature. As a result, the water temperature (T) at the temperature sensor location is lower than the highest water temperature (Tmax) in the cooling system. When the highest water temperature in the cooling system is too high, the coolant locally boils and turns into gas, producing a "cavitation" phenomenon, which affects the reliability of the cooling system components.

[0004] In related technologies, to avoid the problem of local boiling of coolant affecting the reliability of the cooling system, the following measures are usually adopted: 1) cancel the intermittent operation of the water pump and change it to continuous operation; 2) shorten the downtime in the intermittent operation mode; 3) increase the water pump speed.

[0005] However, the related technical measures may prevent the electric water pump from operating at its lowest power consumption, thus failing to maximize fuel-saving effects, which urgently needs to be addressed. Summary of the Invention

[0006] This application provides a control method, device, vehicle, and storage medium for an engine cooling system to solve the problem of coolant boiling affecting the reliability of the cooling system and to reduce the power consumption of the electric water pump.

[0007] The first aspect of this application provides a control method for an engine cooling system, wherein a pressure detection component is provided at the exhaust pipe of the engine cooling system, and the method includes the following steps:

[0008] The current water temperature of the engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment are obtained.

[0009] When the current water temperature is lower than the first preset water temperature, if the current engine speed is lower than the first preset speed and the difference between the current pressure value and the pressure value at the previous moment is lower than the first preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the second preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed, wherein the third preset speed is greater than the second preset speed.

[0010] According to one embodiment of this application, after obtaining the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the method further includes:

[0011] When the current water temperature is greater than or equal to the first preset water temperature and the current water temperature is less than the second preset water temperature, it is determined whether the current engine speed is less than the fourth preset speed, and whether the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value.

[0012] If the current engine speed is less than the fourth preset speed, and the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to the fifth preset speed. The fourth preset speed is greater than the first preset speed, the second preset pressure value is greater than or equal to the first preset pressure value, and the fifth preset speed is greater than the third preset speed.

[0013] According to one embodiment of this application, after obtaining the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the method further includes:

[0014] Determine whether the current water temperature is greater than or equal to the second preset water temperature and whether the current water temperature is less than the third preset water temperature;

[0015] If the current water temperature is greater than or equal to the second preset water temperature and the current water temperature is less than the third preset water temperature, the speed of the electronic water pump of the current engine cooling system is controlled to the sixth preset speed.

[0016] According to one embodiment of this application, after controlling the speed of the electronic water pump of the current engine cooling system to a sixth preset speed, the method further includes:

[0017] Determine whether the current engine speed is greater than or equal to the seventh preset speed, or whether the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the third preset pressure value;

[0018] If the current engine speed is greater than or equal to the seventh preset speed, or the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the third preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the eighth preset speed, wherein the seventh preset speed is greater than the fourth preset speed, the third preset pressure value is greater than the second preset pressure value, and the eighth preset speed is greater than the sixth preset speed.

[0019] According to one embodiment of this application, after obtaining the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the method further includes:

[0020] Determine whether the current water temperature is greater than or equal to the third preset water temperature;

[0021] If the current water temperature is greater than or equal to the third preset water temperature, then the speed of the electronic water pump of the current engine cooling system is controlled to the ninth preset speed.

[0022] According to the control method for an engine cooling system provided in this application embodiment, when the current water temperature of the engine cooling system is lower than a first preset water temperature, if the current engine speed is lower than a first preset speed, and the difference between the current pressure value detected by the pressure detection component and the pressure value at the previous moment is less than a first preset pressure value, then the speed of the electronic water pump in the current engine cooling system is controlled to a second preset speed; otherwise, the speed of the electronic water pump in the current engine cooling system is controlled to a third preset speed. Thus, while reducing the power consumption of the electronic water pump, the problem of coolant boiling affecting the reliability of the cooling system is avoided.

[0023] A second aspect of this application provides a control device for an engine cooling system, wherein a pressure detection component is provided at the exhaust pipe of the engine cooling system, and the device includes:

[0024] The acquisition module is used to acquire the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment.

[0025] The control module is configured to, when the current water temperature is lower than the first preset water temperature, if the current engine speed is lower than the first preset speed and the difference between the current pressure value and the pressure value at the previous moment is less than the first preset pressure value, control the speed of the electronic water pump of the current engine cooling system to a second preset speed; otherwise, control the speed of the electronic water pump of the current engine cooling system to a third preset speed, wherein the third preset speed is greater than the second preset speed.

[0026] According to one embodiment of this application, after acquiring the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the acquisition module is further configured to:

[0027] When the current water temperature is greater than or equal to the first preset water temperature and the current water temperature is less than the second preset water temperature, it is determined whether the current engine speed is less than the fourth preset speed, and whether the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value.

[0028] If the current engine speed is less than the fourth preset speed, and the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to the fifth preset speed. The fourth preset speed is greater than the first preset speed, the second preset pressure value is greater than or equal to the first preset pressure value, and the fifth preset speed is greater than the third preset speed.

[0029] According to one embodiment of this application, after acquiring the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the acquisition module is further configured to:

[0030] Determine whether the current water temperature is greater than or equal to the second preset water temperature and whether the current water temperature is less than the third preset water temperature;

[0031] If the current water temperature is greater than or equal to the second preset water temperature and the current water temperature is less than the third preset water temperature, the speed of the electronic water pump of the current engine cooling system is controlled to the sixth preset speed.

[0032] According to one embodiment of this application, after controlling the speed of the electronic water pump of the current engine cooling system to a sixth preset speed, the control module is further configured to:

[0033] Determine whether the current engine speed is greater than or equal to the seventh preset speed, or whether the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the third preset pressure value;

[0034] If the current engine speed is greater than or equal to the seventh preset speed, or the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the third preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the eighth preset speed, wherein the seventh preset speed is greater than the fourth preset speed, the third preset pressure value is greater than the second preset pressure value, and the eighth preset speed is greater than the sixth preset speed.

[0035] According to one embodiment of this application, after acquiring the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the acquisition module is further configured to:

[0036] Determine whether the current water temperature is greater than or equal to the third preset water temperature;

[0037] If the current water temperature is greater than or equal to the third preset water temperature, then the speed of the electronic water pump of the current engine cooling system is controlled to the ninth preset speed.

[0038] According to the control device for the engine cooling system provided in this application embodiment, when the current water temperature of the engine cooling system is lower than a first preset water temperature, if the current engine speed is lower than a first preset speed, and the difference between the current pressure value detected by the pressure detection component and the pressure value at the previous moment is less than a first preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to a second preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to a third preset speed. Thus, while reducing the power consumption of the electronic water pump, the problem of coolant boiling affecting the reliability of the cooling system is avoided.

[0039] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the control method for the engine cooling system as described in the above embodiments.

[0040] A fourth aspect of this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform the control method for the engine cooling system as described in the above embodiments.

[0041] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0042] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0043] Figure 1 This is a schematic diagram of the structure of an engine cooling system according to an embodiment of this application;

[0044] Figure 2 This is a flowchart of a control method for an engine cooling system according to an embodiment of this application;

[0045] Figure 3 This is a block diagram of a control device for an engine cooling system according to an embodiment of this application;

[0046] Figure 4 This is a schematic diagram of the vehicle structure provided in an embodiment of this application. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0048] The following description, with reference to the accompanying drawings, describes a control method, apparatus, vehicle, and storage medium for an engine cooling system according to embodiments of this application.

[0049] Before introducing the control method of the engine cooling system in the embodiments of this application, let me first introduce the engine cooling system involved in the control method of the engine cooling system in this application.

[0050] Those skilled in the art will understand that when coolant boils, the coolant pressure fluctuates significantly. Based on this principle, this application adds a pressure detection component to the existing cooling system and transmits the signal from the pressure detection component to the ECU. By using the pressure detection component to monitor whether the cooling system pressure suddenly fluctuates significantly within a short period of time, it can be determined whether the coolant is boiling. The pressure detection component can be a pressure sensor.

[0051] Optionally, in order to achieve better monitoring results, the pressure detection component can be placed as close as possible to the heat source (engine exhaust manifold). One preferred embodiment is to provide a pressure detection component mounting hole on the exhaust pipe flange surface, through which the pressure detection component extends into the engine water jacket.

[0052] For example, the engine cooling system structure of this application embodiment can be as follows: Figure 1 As shown, it includes a pressure sensor, a temperature sensor, an engine, an electric water pump, a thermostat, a radiator, and an ECU. Furthermore, in this embodiment, to avoid potential measurement lag due to sudden increases in engine heat dissipation rate causing pressure fluctuations, the engine speed signal is incorporated into the water pump control strategy. According to... Figure 1 The engine cooling system shown can control the speed of the electronic pump based on the engine cooling system's water temperature, current water pressure, previous water pressure, and engine speed, thereby reducing fuel consumption and improving the reliability of the engine cooling system.

[0053] The control method for the engine cooling system based on the above-mentioned engine cooling system is described below.

[0054] Specifically, Figure 2 This is a flowchart illustrating a control method for an engine cooling system provided in an embodiment of this application.

[0055] like Figure 2 As shown, the control method for this engine cooling system includes the following steps:

[0056] In step S201, the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment are obtained.

[0057] Optionally, in this embodiment of the application, the current water temperature of the current engine cooling system can be obtained by a temperature sensor installed in the current engine cooling system, the current engine speed can be obtained by a speed sensor, and the current pressure value and the pressure value at the previous moment can be obtained by a pressure detection component. No specific limitations are made here.

[0058] The unit for the previous moment can be seconds, and the sampling frequency of the pressure detection component can be greater than or equal to 10Hz, without specific limitations.

[0059] In step S202, when the current water temperature is lower than the first preset water temperature, if the current engine speed is lower than the first preset speed and the difference between the current pressure value and the pressure value at the previous moment is less than the first preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the second preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed, wherein the third preset speed is greater than the second preset speed.

[0060] Optionally, the first preset water temperature can be in the range of 30℃ to 80℃, the first preset pressure can be in the range of 5kPa to 20kPa, the first preset speed can be in the range of 1000rpm to 3000rpm, the second preset speed can be 2000rpm, and the third preset speed can be 2500rpm, without any specific limitation.

[0061] Specifically, when the current water temperature is lower than the first preset water temperature, it is further determined whether the current engine speed is lower than the first preset speed, and whether the difference between the current pressure value and the pressure value at the previous moment is lower than the first preset pressure value. If the current engine speed is lower than the first preset speed, and the difference between the current pressure value and the pressure value at the previous moment is lower than the first preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the second preset speed.

[0062] Furthermore, when the current water temperature is lower than the first preset water temperature, if the current engine speed is greater than or equal to the first preset speed, or if the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the first preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed.

[0063] Furthermore, in some embodiments, after acquiring the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the method further includes: when the current water temperature is greater than or equal to a first preset water temperature and the current water temperature is less than a second preset water temperature, determining whether the current engine speed is less than a fourth preset speed and whether the difference between the current pressure value and the pressure value at the previous moment is less than a second preset pressure value; if the current engine speed is less than the fourth preset speed and the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value, then controlling the speed of the electronic water pump of the current engine cooling system to a third preset speed; otherwise, controlling the speed of the electronic water pump of the current engine cooling system to a fifth preset speed, wherein the fourth preset speed is greater than the first preset speed, the second preset pressure value is greater than or equal to the first preset pressure value, and the fifth preset speed is greater than the third preset speed.

[0064] Optionally, the second preset water temperature can be in the range of 90℃~95℃, the fourth preset speed can be in the range of 3000rpm~3500rpm, the second preset pressure can be in the range of 20kPa~23kPa, and the fifth preset speed can be 3000rpm, without any specific limitation.

[0065] Specifically, when the current water temperature is greater than or equal to the first preset water temperature and less than the second preset water temperature, it is determined whether the current engine speed is less than the fourth preset speed and whether the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value. If the current engine speed is less than the fourth preset speed and the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed.

[0066] In addition, when the current water temperature is greater than or equal to the first preset water temperature and less than the second preset water temperature, if the current engine speed is greater than or equal to the fourth preset speed, or the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the second preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the fifth preset speed.

[0067] Furthermore, in some embodiments, after obtaining the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the method further includes: determining whether the current water temperature is greater than or equal to a second preset water temperature and whether the current water temperature is less than a third preset water temperature; if the current water temperature is greater than or equal to the second preset water temperature and the current water temperature is less than the third preset water temperature, controlling the speed of the electronic water pump of the current engine cooling system to a sixth preset speed.

[0068] The third preset water temperature can be set between 105℃ and 115℃, and the sixth preset rotation speed can be set to the same value as the fifth preset rotation speed.

[0069] Specifically, if the current water temperature is greater than or equal to the second preset water temperature and less than the third preset water temperature, the speed of the electronic water pump in the current engine cooling system is directly controlled to the sixth preset speed.

[0070] Furthermore, in some embodiments, after controlling the current engine cooling system's electronic water pump speed to a sixth preset speed, the method further includes: determining whether the current engine speed is greater than or equal to a seventh preset speed, or whether the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to a third preset pressure value; if the current engine speed is greater than or equal to the seventh preset speed, or the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the third preset pressure value, then controlling the current engine cooling system's electronic water pump speed to an eighth preset speed, wherein the seventh preset speed is greater than the fourth preset speed, the third preset pressure value is greater than the second preset pressure value, and the eighth preset speed is greater than the sixth preset speed.

[0071] The seventh preset speed can be set between 3500 rpm and 4000 rpm, the third preset pressure can be set between 23 kPa and 25 kPa, and the eighth preset speed can be set between the highest speed of the electric water pump in the current engine cooling system.

[0072] Specifically, after controlling the current engine cooling system's electronic water pump speed to the sixth preset speed, it further determines whether the current engine speed is greater than or equal to the seventh preset speed, or whether the difference between the current pressure value and the previous pressure value is greater than or equal to the third preset pressure value. If the current engine speed is greater than or equal to the seventh preset speed, or the difference between the current pressure value and the previous pressure value is greater than or equal to the third preset pressure value, then the current engine cooling system's electronic water pump speed is controlled to the eighth preset speed, which is the current maximum speed of the electronic water pump.

[0073] Furthermore, in some embodiments, after obtaining the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the method further includes: determining whether the current water temperature is greater than or equal to a third preset water temperature; if the current water temperature is greater than or equal to the third preset water temperature, then controlling the speed of the electronic water pump of the current engine cooling system to a ninth preset speed.

[0074] The ninth preset speed is the same as the eighth preset speed, which is the highest speed of the electronic water pump in the current engine cooling system.

[0075] Specifically, if the current water temperature is greater than or equal to the third preset water temperature, it means that the engine coolant is boiling. Therefore, the speed of the electronic water pump in the current engine cooling system is controlled to the ninth preset speed, which is the maximum speed of the current electronic water pump.

[0076] To enable those skilled in the art to understand the control method of the engine cooling system proposed in this application more clearly and intuitively, a detailed description is provided below with reference to specific embodiments.

[0077] Assuming the first preset water temperature T1 is 50℃, the second preset water temperature T2 is 80℃, the third preset water temperature T3 is 110℃, the first preset speed N1, the fourth preset speed N2, and the seventh preset speed N3 are all 3000 rpm, the first preset pressure P1, the second preset pressure P2, and the third preset pressure P3 are all 20 kPa, the second preset speed n1 is 2000 rpm, the third preset speed n2 is 2500 rpm, the fifth preset speed n3 and the sixth preset speed n4 are 3000 rpm, and the eighth and ninth preset speeds are both the maximum water pump speed nmax, then the electronic water pump speed n can be controlled based on the following strategy, using the current water temperature T, the current water pressure P(t), the previous water pressure P(t-1), and the current engine speed N. Here, P(t) and (t-1) are the pressures measured at times t and (t-1), respectively, in seconds, with a sampling frequency ≥10Hz. The specific control strategy is as follows:

[0078] (1) When T < 50℃:

[0079] If N < 3000 rpm and P(t) - P(t-1) < 20 kPa, then n = 2000 rpm;

[0080] If N≥3000rpm or P(t)-P(t-1)≥20kPa, then n=2500rpm.

[0081] (2) When 50℃≤T<80℃:

[0082] If N < 3000 rpm and P(t) - P(t-1) < 20 kPa, then n = 2500 rpm;

[0083] If N≥3000rpm or P(t)-P(t-1)≥20kPa, then n=3000rpm.

[0084] (3) When 80≤T<110, then n=3000rpm;

[0085] Further judgment is made if N≥3000rpm or P(t)-P(t-1)≥20kPa, then n=nmax.

[0086] (4) When T≥T3, n=nmax.

[0087] According to the engine cooling system control method proposed in this application, when the current water temperature of the engine cooling system is lower than a first preset water temperature, if the current engine speed is lower than a first preset speed, and the difference between the current pressure value detected by the pressure detection component and the pressure value at the previous moment is less than a first preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to a second preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to a third preset speed. Thus, while reducing the power consumption of the electronic water pump, the problem of coolant boiling affecting the reliability of the cooling system is avoided.

[0088] Next, the control device for the engine cooling system proposed according to the embodiments of this application is described with reference to the accompanying drawings.

[0089] In this embodiment, a pressure detection component is installed at the exhaust pipe of the engine cooling system.

[0090] Figure 3 This is a block diagram of the control device of the engine cooling system according to an embodiment of this application.

[0091] like Figure 3 As shown, the control device 10 of the engine cooling system includes: an acquisition module 100 and a control module 200.

[0092] The acquisition module 100 is used to acquire the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment. The control module 200 is used to control the speed of the electronic water pump of the current engine cooling system to a second preset speed when the current water temperature is lower than a first preset water temperature, the current engine speed is lower than a first preset speed, and the difference between the current pressure value and the pressure value at the previous moment is less than a first preset pressure value; otherwise, it controls the speed of the electronic water pump of the current engine cooling system to a third preset speed, wherein the third preset speed is greater than the second preset speed.

[0093] Furthermore, in some embodiments, after acquiring the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the acquisition module 100 is further configured to: when the current water temperature is greater than or equal to a first preset water temperature and the current water temperature is less than a second preset water temperature, determine whether the current engine speed is less than a fourth preset speed and whether the difference between the current pressure value and the pressure value at the previous moment is less than a second preset pressure value; if the current engine speed is less than the fourth preset speed and the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value, then control the speed of the electronic water pump of the current engine cooling system to a third preset speed; otherwise, control the speed of the electronic water pump of the current engine cooling system to a fifth preset speed, wherein the fourth preset speed is greater than the first preset speed, the second preset pressure value is greater than or equal to the first preset pressure value, and the fifth preset speed is greater than the third preset speed.

[0094] Furthermore, in some embodiments, after acquiring the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the acquisition module 100 is further configured to: determine whether the current water temperature is greater than or equal to the second preset water temperature and whether the current water temperature is less than the third preset water temperature; if the current water temperature is greater than or equal to the second preset water temperature and the current water temperature is less than the third preset water temperature, control the speed of the electronic water pump of the current engine cooling system to the sixth preset speed.

[0095] Furthermore, in some embodiments, after controlling the current engine cooling system's electronic water pump speed to a sixth preset speed, the control module 200 is further configured to: determine whether the current engine speed is greater than or equal to a seventh preset speed, or whether the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to a third preset pressure value; if the current engine speed is greater than or equal to the seventh preset speed, or the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the third preset pressure value, then control the current engine cooling system's electronic water pump speed to an eighth preset speed, wherein the seventh preset speed is greater than the fourth preset speed, the third preset pressure value is greater than the second preset pressure value, and the eighth preset speed is greater than the sixth preset speed.

[0096] Furthermore, in some embodiments, after acquiring the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the acquisition module 100 is also used to: determine whether the current water temperature is greater than or equal to a third preset water temperature; if the current water temperature is greater than or equal to the third preset water temperature, then control the speed of the electronic water pump of the current engine cooling system to a ninth preset speed.

[0097] It should be noted that the foregoing explanation of the control method embodiment for the engine cooling system also applies to the control device of the engine cooling system in this embodiment, and will not be repeated here.

[0098] According to the control device for the engine cooling system proposed in this application embodiment, when the current water temperature of the engine cooling system is lower than a first preset water temperature, if the current engine speed is lower than a first preset speed, and the difference between the current pressure value detected by the pressure detection component and the pressure value at the previous moment is less than a first preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to a second preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to a third preset speed. Thus, while reducing the power consumption of the electronic water pump, the problem of coolant boiling affecting the reliability of the cooling system is avoided.

[0099] Figure 4 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include:

[0100] The memory 401, the processor 402, and the computer program stored on the memory 401 and capable of running on the processor 402.

[0101] When the processor 402 executes the program, it implements the control method of the engine cooling system provided in the above embodiments.

[0102] Furthermore, the vehicle also includes:

[0103] Communication interface 403 is used for communication between memory 401 and processor 402.

[0104] The memory 401 is used to store computer programs that can run on the processor 402.

[0105] The memory 401 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0106] If the memory 401, processor 402, and communication interface 403 are implemented independently, then the communication interface 403, memory 401, and processor 402 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized into address buses, data buses, control buses, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0107] Optionally, in a specific implementation, if the memory 401, processor 402, and communication interface 403 are integrated on a single chip, then the memory 401, processor 402, and communication interface 403 can communicate with each other through an internal interface.

[0108] Processor 402 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0109] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described control method for the engine cooling system.

[0110] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0111] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0112] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0113] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0114] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0115] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0116] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0117] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A control method for an engine cooling system, characterized in that, A pressure detection component is installed at the exhaust pipe of the engine cooling system, wherein the method includes the following steps: The current water temperature of the engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment are obtained. When the current water temperature is lower than the first preset water temperature, if the current engine speed is lower than the first preset speed and the difference between the current pressure value and the pressure value at the previous moment is lower than the first preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the second preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed, wherein the third preset speed is greater than the second preset speed.

2. The method according to claim 1, characterized in that, After acquiring the current coolant temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the following steps are also included: When the current water temperature is greater than or equal to the first preset water temperature and the current water temperature is less than the second preset water temperature, it is determined whether the current engine speed is less than the fourth preset speed, and whether the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value. If the current engine speed is less than the fourth preset speed, and the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to the fifth preset speed. The fourth preset speed is greater than the first preset speed, the second preset pressure value is greater than or equal to the first preset pressure value, and the fifth preset speed is greater than the third preset speed.

3. The method according to claim 2, characterized in that, After acquiring the current coolant temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the following steps are also included: Determine whether the current water temperature is greater than or equal to the second preset water temperature and whether the current water temperature is less than the third preset water temperature; If the current water temperature is greater than or equal to the second preset water temperature and the current water temperature is less than the third preset water temperature, the speed of the electronic water pump of the current engine cooling system is controlled to the sixth preset speed.

4. The method according to claim 3, characterized in that, After controlling the speed of the electric water pump in the current engine cooling system to the sixth preset speed, the method further includes: Determine whether the current engine speed is greater than or equal to the seventh preset speed, or whether the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the third preset pressure value; If the current engine speed is greater than or equal to the seventh preset speed, or the difference between the current pressure value and the pressure value at the previous moment is greater than or equal to the third preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the eighth preset speed, wherein the seventh preset speed is greater than the fourth preset speed, the third preset pressure value is greater than the second preset pressure value, and the eighth preset speed is greater than the sixth preset speed.

5. The method according to claim 3, characterized in that, After acquiring the current coolant temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the following steps are also included: Determine whether the current water temperature is greater than or equal to the third preset water temperature; If the current water temperature is greater than or equal to the third preset water temperature, then the speed of the electronic water pump of the current engine cooling system is controlled to the ninth preset speed.

6. A control device for an engine cooling system, characterized in that, A pressure detection component is installed at the exhaust pipe of the engine cooling system, wherein the device includes: The acquisition module is used to acquire the current water temperature of the current engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment. The control module is configured to, when the current water temperature is lower than the first preset water temperature, if the current engine speed is lower than the first preset speed and the difference between the current pressure value and the pressure value at the previous moment is less than the first preset pressure value, control the speed of the electronic water pump of the current engine cooling system to a second preset speed; otherwise, control the speed of the electronic water pump of the current engine cooling system to a third preset speed, wherein the third preset speed is greater than the second preset speed.

7. The apparatus according to claim 6, characterized in that, After acquiring the current coolant temperature of the engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the acquisition module is further configured to: When the current water temperature is greater than or equal to the first preset water temperature and the current water temperature is less than the second preset water temperature, it is determined whether the current engine speed is less than the fourth preset speed, and whether the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value. If the current engine speed is less than the fourth preset speed, and the difference between the current pressure value and the pressure value at the previous moment is less than the second preset pressure value, then the speed of the electronic water pump of the current engine cooling system is controlled to the third preset speed; otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to the fifth preset speed. The fourth preset speed is greater than the first preset speed, the second preset pressure value is greater than or equal to the first preset pressure value, and the fifth preset speed is greater than the third preset speed.

8. The apparatus according to claim 7, characterized in that, After acquiring the current coolant temperature of the engine cooling system, the current engine speed, the current pressure value detected by the pressure detection component, and the pressure value at the previous moment, the acquisition module is further configured to: Determine whether the current water temperature is greater than or equal to the second preset water temperature and whether the current water temperature is less than the third preset water temperature; If the current water temperature is greater than or equal to the second preset water temperature and the current water temperature is less than the third preset water temperature, the speed of the electronic water pump of the current engine cooling system is controlled to the sixth preset speed.

9. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement a control method for an engine cooling system as described in any one of claims 1-5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the control method for the engine cooling system as described in any one of claims 1-5.

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