Control method and device of engine cooling system, vehicle and storage medium

Abstract

The invention relates to a control method and device for an engine cooling system, a vehicle and a storage medium, a pressure detection assembly is arranged at an exhaust pipe of the engine cooling system, and the method comprises the steps that when the current water temperature of the current engine cooling system is smaller than a first preset water temperature, if the current engine rotating speed is smaller than a first preset rotating speed, the pressure detection assembly is started; if the current pressure value detected by the pressure detection assembly is smaller than the first preset pressure value and the difference value between the current pressure value detected by the pressure detection assembly and the pressure value at the last moment is smaller than the first preset pressure value, the current electronic water pump rotating speed of the engine cooling system is controlled to be a second preset rotating speed, otherwise, the current electronic water pump rotating speed of the engine cooling system is controlled to be a third preset rotating speed, the third preset rotating speed is greater than the second preset rotating speed. Therefore, while the power consumption of the electronic water pump is reduced, the problem that the reliability of the cooling system is affected by boiling of the cooling liquid is avoided.

Description

Technical Field

[0001] The present 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 Art

[0002] At present, the cooling system of the engine with an electronic water pump generally adopts a cooling strategy controlled by the ECU (Electronic Control Unit). The ECU controls the speed of the electronic water pump through electrical signals, and the temperature sensor is arranged in the engine cooling channel, which is responsible for detecting the actual water temperature in the engine cooling channel and transmitting the data to the ECU. The ECU stores the preset water temperature-electronic water pump speed control strategy. According to the different input water temperatures, the ECU transmits different electrical signals to the electronic water pump to adjust its speed. Generally, when the water temperature is low, the electronic water pump is controlled to operate intermittently or at a low speed; when the water temperature is high, the electronic water pump is controlled to rotate at a high speed to enhance the cooling effect. Based on this strategy, the electronic water pump can operate in a low-power state to achieve the purpose of reducing fuel consumption.

[0003] However, due to the complex structure of the engine cooling system, it is difficult to arrange the temperature sensor at the position with the highest water temperature, resulting in the water temperature (T) at the temperature sensor position being lower than the maximum water temperature (Tmax) in the cooling system. When the maximum water temperature in the cooling system is too high, the coolant locally boils and turns into gas, causing "cavitation" and affecting the reliability of cooling system components.

[0004] In the related art, in order to avoid the problem of local boiling of coolant and thus affecting the reliability of the cooling system, the following measures are usually adopted: 1) canceling the intermittent operation of the water pump and changing it to constant operation of the water pump; 2) shortening the stop time in the intermittent operation mode; 3) increasing the speed of the water pump.

[0005] However, related technical measures will cause the electronic water pump to be unable to operate in the lowest power consumption state, thus failing to maximize the fuel saving effect, which urgently needs to be solved. Summary of the invention

[0006] The present application provides a control method, device, vehicle and storage medium of an engine cooling system to solve the problem of cooling system reliability affected by coolant boiling and reduce the power consumption of an electronic water pump.

[0007] A first aspect of the present application provides a control method for an engine cooling system, wherein an exhaust pipe of the engine cooling system is provided with a pressure detection component, wherein the method comprises the following steps:

[0008] 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;

[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 electronic water pump speed of the current engine cooling system is controlled to be the second preset speed; otherwise, the electronic water pump speed of the current engine cooling system is controlled to be the third preset speed, wherein the third preset speed is higher than the second preset speed.

[0010] According to one embodiment of the present 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, it also 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, 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;

[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, the electronic water pump speed of the current engine cooling system is controlled to be the third preset speed; otherwise, the electronic water pump speed of the current engine cooling system is controlled to be the 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.

[0013] According to one embodiment of the present 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, it also includes:

[0014] Determining 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 a 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 electronic water pump speed of the current engine cooling system is controlled to be a sixth preset speed.

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

[0017] 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;

[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, the electronic water pump speed of the current engine cooling system is controlled to be 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 the present 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, it also includes:

[0020] Determining 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, the electronic water pump speed of the current engine cooling system is controlled to be a ninth preset speed.

[0022] According to the control method of the engine cooling system provided by the embodiment of the present application, when the current water temperature of the current engine cooling system is less than the first preset water temperature, if the current engine speed is less than the 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 the first preset pressure value, the speed of the electronic water pump of the current engine cooling system is controlled to be the second preset speed, otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to be the third preset speed. Thus, while reducing the power consumption of the electronic water pump, the problem of cooling system reliability affected by coolant boiling is avoided.

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

[0024] An acquisition module, 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] A control module is used to control the electronic water pump speed of the current engine cooling system to a second preset speed when the current water temperature is lower than a 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, otherwise, control the electronic water pump speed 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 the present 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 acquisition module is further used 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, 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;

[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, the electronic water pump speed of the current engine cooling system is controlled to be the third preset speed; otherwise, the electronic water pump speed of the current engine cooling system is controlled to be the 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.

[0029] According to one embodiment of the present 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 acquisition module is further used to:

[0030] Determining 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 a 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 electronic water pump speed of the current engine cooling system is controlled to be a sixth preset speed.

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

[0033] 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;

[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, the electronic water pump speed of the current engine cooling system is controlled to be 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 the present 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 acquisition module is further used to:

[0036] Determining 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, the electronic water pump speed of the current engine cooling system is controlled to be a ninth preset speed.

[0038] According to the control device of the engine cooling system provided by the embodiment of the present application, when the current water temperature of the current engine cooling system is less than the first preset water temperature, if the current engine speed is less than the 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 the first preset pressure value, the speed of the electronic water pump of the current engine cooling system is controlled to be the second preset speed, otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to be the third preset speed. Thus, while reducing the power consumption of the electronic water pump, the problem of cooling system reliability affected by coolant boiling is avoided.

[0039] A third aspect of the present application provides a vehicle, comprising: 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 of the engine cooling system as described in the above embodiment.

[0040] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the control method of the engine cooling system as described in the above embodiment.

[0041] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0044] Figure 2 A flow chart of a control method for an engine cooling system provided according to an embodiment of the present application;

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

[0046] Figure 4 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

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

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

[0049] Before introducing the control method of the engine cooling system of the embodiment of the present application, the engine cooling system involved in the control method of the engine cooling system of the present application is first introduced.

[0050] Those skilled in the art can understand that when the coolant boils, the pressure of the coolant will fluctuate greatly. Based on this principle, the present application arranges a new pressure detection component in the existing cooling system, and transmits the pressure detection component signal to the ECU. The pressure detection component is used to monitor whether the pressure of the cooling system suddenly fluctuates greatly in a short period of time to determine whether the coolant is boiling. The pressure detection component can be a pressure sensor.

[0051] Optionally, in order to achieve better monitoring effects, the pressure detection assembly can be set as close to the heat source (engine exhaust duct) as possible, wherein one of the preferred implementation schemes is to set a pressure detection assembly mounting hole on the exhaust pipe flange surface, and the pressure detection assembly extends into the engine water jacket through the mounting hole.

[0052] For example, the engine cooling system structure of the embodiment of the present application can be as follows: Figure 1 As shown, it includes a pressure sensor, a temperature sensor, an engine, an electronic water pump, a thermostat, a radiator and an ECU. In addition, in order to avoid the possibility of pressure fluctuation measurement hysteresis due to a sudden increase in the engine heat release rate, the embodiment of the application introduces the engine speed signal into the water pump control strategy. Figure 1 The engine cooling system shown can control the speed of the electronic pump based on the water temperature of the engine cooling system, the current water pressure, the water pressure at the last moment and the engine speed, thereby reducing fuel consumption and improving the reliability of the engine cooling system.

[0053] The following describes a control method for an engine cooling system based on the above engine cooling system.

[0054] Specifically, Figure 2 A flow chart of a control method for an engine cooling system provided in an embodiment of the present application.

[0055] like Figure 2 As shown, the control method of the 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 last moment are obtained.

[0057] Optionally, the embodiment of the present application can obtain the current water temperature of the current engine cooling system through a temperature sensor set in the current engine cooling system, can obtain the current engine speed through a speed sensor, and can obtain the current pressure value and the pressure value at the previous moment through a pressure detection component, which is not specifically limited here.

[0058] The unit of the previous moment may be seconds, and the sampling frequency of the pressure detection component for detecting the pressure value may be greater than or equal to 10 Hz, which is not specifically limited here.

[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 lower than the first preset pressure value, then the electronic water pump speed of the current engine cooling system is controlled to be the second preset speed; otherwise, the electronic water pump speed of the current engine cooling system is controlled to be the third preset speed, wherein the third preset speed is greater than the second preset speed.

[0060] Optionally, the first preset water temperature can range from 30°C to 80°C, the first preset pressure value can range from 5kPa to 20kPa, the first preset speed can range from 1000rpm to 3000rpm, the second preset speed can be 2000rpm, and the third preset speed can be 2500rpm, which are not specifically limited here.

[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, the electronic water pump speed of the current engine cooling system is controlled to be the second preset speed.

[0062] In addition, 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 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, the electronic water pump speed of the current engine cooling system is controlled to be the third preset speed.

[0063] Further, in some embodiments, after obtaining the current water temperature, current engine speed, current pressure value detected by the pressure detection component and pressure value at the previous moment of the current engine cooling system, it also includes: 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, judging 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 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 controlling the electronic water pump speed of the current engine cooling system to be the third preset speed; otherwise, controlling the electronic water pump speed of the current engine cooling system to be the 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 range from 90℃ to 95℃, the fourth preset speed can range from 3000rpm to 3500rpm, the second preset pressure value can range from 20kPa to 23kPa, and the fifth preset speed can be 3000rpm, which is not specifically limited here.

[0065] Specifically, 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, determine 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 electronic water pump speed of the current engine cooling system is controlled to be the third preset speed.

[0066] In addition, 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, 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 electronic water pump speed of the current engine cooling system is controlled to be the fifth preset speed.

[0067] Further, 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, it also includes: determining 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, controlling the electronic water pump speed of the current engine cooling system to be a sixth preset speed.

[0068] The value range of the third preset water temperature may be 105° C. to 115° C., and the value of the sixth preset speed may be the same as the value of the fifth preset speed.

[0069] Specifically, 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 electronic water pump speed of the current engine cooling system is directly controlled to be the sixth preset speed.

[0070] Further, in some embodiments, after controlling the electronic water pump speed of the current engine cooling system to be the sixth preset speed, it also includes: judging 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 controlling the electronic water pump speed of the current engine cooling system to be 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.

[0071] Among them, the value range of the seventh preset speed may be 3500rpm~4000rpm, the value range of the third preset pressure value may be 23kPa~25kPa, and the eighth preset speed may be the maximum speed of the electronic water pump of the current engine cooling system.

[0072] Specifically, after controlling the electronic water pump speed of the current engine cooling system to be the sixth preset speed, it is further judged 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, the electronic water pump speed of the current engine cooling system is controlled to be the eighth preset speed, that is, the maximum speed of the current 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, it also 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 electronic water pump speed of the current engine cooling system to be a ninth preset speed.

[0074] The ninth preset speed is the same as the eighth preset speed, which is the maximum speed of the electronic water pump of 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 in a boiling state. Therefore, the electronic water pump speed of the current engine cooling system is controlled to be the ninth preset speed, that is, the maximum speed of the current electronic water pump.

[0076] In order to help those skilled in the art to more clearly and intuitively understand the control method of the engine cooling system proposed in the present application, a detailed description is given below in conjunction with specific embodiments.

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

[0078] (1) When T<50℃:

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

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

[0081] (2) When 50℃≤T<80℃:

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

[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: if N≥3000rpm or P(t)-P(t-1)≥20kPa, n=nmax.

[0086] (4) When T≥T3, n=nmax.

[0087] According to the control method of the engine cooling system proposed in the embodiment of the present application, when the current water temperature of the current engine cooling system is less than the first preset water temperature, if the current engine speed is less than the 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 the first preset pressure value, the speed of the electronic water pump of the current engine cooling system is controlled to be the second preset speed, otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to be the third preset speed. Thus, while reducing the power consumption of the electronic water pump, the problem of cooling system reliability affected by coolant boiling is avoided.

[0088] Next, a control device for an engine cooling system according to an embodiment of the present application will be described with reference to the accompanying drawings.

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

[0090] Figure 3 It is a block diagram of a control device for an engine cooling system according to an embodiment of the present 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] Among them, the acquisition module 100 is used to obtain the current water temperature, the current engine speed, the current pressure value detected by the pressure detection component and the pressure value at the previous moment of the current engine cooling system; the control module 200 is used to control the electronic water pump speed of the current engine cooling system to the second preset speed 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; otherwise, control the electronic water pump speed of the current engine cooling system to the third preset speed, wherein the third preset speed is greater than the second preset speed.

[0093] Further, in some embodiments, after obtaining the current water temperature, current engine speed, current pressure value detected by the pressure detection component and pressure value at the previous moment of the current engine cooling system, the acquisition module 100 is also used 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, 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 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 control the electronic water pump speed of the current engine cooling system to be the third preset speed; otherwise, control the electronic water pump speed of the current engine cooling system to be the 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] Further, 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 acquisition module 100 is also used 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 electronic water pump speed of the current engine cooling system to be a sixth preset speed.

[0095] Further, in some embodiments, after controlling the electronic water pump speed of the current engine cooling system to be the sixth preset speed, the control module 200 is also used to: 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 control the electronic water pump speed of the current engine cooling system to be 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.

[0096] 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 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 electronic water pump speed of the current engine cooling system to be a ninth preset speed.

[0097] It should be noted that the above explanation of the embodiment of the control method of the engine cooling system is also applicable to the control device of the engine cooling system of this embodiment, which will not be repeated here.

[0098] According to the control device of the engine cooling system proposed in the embodiment of the present application, when the current water temperature of the current engine cooling system is less than the first preset water temperature, if the current engine speed is less than the 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 the first preset pressure value, the speed of the electronic water pump of the current engine cooling system is controlled to be the second preset speed, otherwise, the speed of the electronic water pump of the current engine cooling system is controlled to be the third preset speed. Thus, while reducing the power consumption of the electronic water pump, the problem of cooling system reliability affected by coolant boiling is avoided.

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

[0100] Memory 401 , processor 402 , and a computer program stored in the memory 401 and executable on the processor 402 .

[0101] When the processor 402 executes the program, the control method of the engine cooling system provided in the above embodiment is implemented.

[0102] Furthermore, the vehicle also includes:

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

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

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

[0106] If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

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

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

[0109] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned control method for the engine cooling system.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

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

[0112] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0113] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0114] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0115] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0116] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0117] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A control method for an engine cooling system, characterized in that: The exhaust pipe of the engine cooling system is provided with a pressure detection component, wherein the method comprises the following steps: 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; 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 electronic water pump speed of the current engine cooling system is controlled to be the second preset speed; otherwise, the electronic water pump speed of the current engine cooling system is controlled to be the third preset speed, wherein the third preset speed is higher than the second preset speed.

2. The method according to claim 1, characterized in that 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 last moment, the method further includes: 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, 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, the electronic water pump speed of the current engine cooling system is controlled to be the third preset speed; otherwise, the electronic water pump speed of the current engine cooling system is controlled to be the 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.

3. The method according to claim 1, characterized in that 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 last moment, the method further includes: Determining 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 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, the electronic water pump speed of the current engine cooling system is controlled to be a sixth preset speed.

4. The method according to claim 3, characterized in that After controlling the speed of the electronic water pump of the current engine cooling system to be 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, the electronic water pump speed of the current engine cooling system is controlled to be 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 1, characterized in that 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 last moment, the method further includes: Determining 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, the electronic water pump speed of the current engine cooling system is controlled to be a ninth preset speed.

6. A control device for an engine cooling system, characterized in that: The exhaust pipe of the engine cooling system is provided with a pressure detection assembly, wherein the device comprises: An acquisition module, 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; A control module is used to control the electronic water pump speed of the current engine cooling system to a second preset speed when the current water temperature is lower than a 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, otherwise, control the electronic water pump speed 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 device according to claim 6, characterized in that 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 acquisition module is further used 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, 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, the electronic water pump speed of the current engine cooling system is controlled to be the third preset speed; otherwise, the electronic water pump speed of the current engine cooling system is controlled to be the 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.

8. The device according to claim 6, characterized in that 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 acquisition module is further used to: Determining 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 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, the electronic water pump speed of the current engine cooling system is controlled to be a 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, wherein the processor executes the program to implement the control method of the engine cooling system according to any one of claims 1 to 5.

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

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