A method, system, storage medium and vehicle for preventing water pump idling

Abstract

The application provides a method, system, storage medium and vehicle for preventing water pump idling, belonging to the technical field of vehicles. The method for preventing water pump idling comprises the following steps: acquiring the current air content of cooling liquid flowing through the second water pump; acquiring target information under the condition that the current air content indicates that there is air in the cooling liquid, wherein the target information comprises the current rotating speed of the first water pump and / or the current temperature of the target component; and adjusting the rotating speed of the first water pump and / or the second water pump based on the target information, so that the rotating speed difference between the first water pump and the second water pump after the adjustment is greater than the rotating speed difference between the first water pump and the second water pump before the adjustment. The method can increase the cooling liquid flowing between the first water pump and the second water pump per unit time, and the air between the first water pump and the second water pump is squeezed out by the increased cooling liquid, thereby effectively avoiding water pump idling.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular, to a method, system, storage medium, and vehicle for preventing a water pump from idling. Background Art

[0002] A water pump is a device installed in a pipeline to drive the flow of liquid within it. In a vehicle's cooling system, two water pumps can be connected in series to increase the coolant's head. However, when two water pumps are connected in series to drive the coolant flow, the speed difference between the two pumps can cause bubbles to form in the coolant, leading to idling of the water pumps. Summary of the Invention

[0003] Based on this, the present application provides a method, system, storage medium and vehicle for preventing a water pump from idling, so as to solve the problem of how to avoid the water pump from idling.

[0004] In a first aspect of an embodiment of the present application, a method for preventing a water pump from idling is provided. The method is applied to a cooling system of a vehicle, the cooling system being used to cool a target component. The cooling system includes a first water pump and a second water pump connected in series, the first water pump being located upstream of the second water pump. The method includes:

[0005] obtaining a current air content of the coolant flowing through the second water pump;

[0006] When the current air content indicates that air exists in the coolant, obtaining target information based on which the speed adjustment action is performed, the target information including the current speed of the first water pump and / or the current temperature of the target component;

[0007] Based on the target information, the speed of the first water pump and / or the second water pump is adjusted so that the speed difference between the first water pump and the second water pump after the adjustment is greater than the speed difference between the first water pump and the second water pump before the adjustment.

[0008] Optionally, the target information includes a current rotational speed of the first water pump, and adjusting the rotational speed of the first water pump and / or the second water pump based on the target information includes:

[0009] When the current rotation speed is less than the maximum rotation speed of the first water pump, increasing the rotation speed of the first water pump;

[0010] When the current rotational speed is equal to the maximum rotational speed, the rotational speed of the second water pump is reduced.

[0011] The embodiment adjusts the rotating speeds of the first water pump and the second water pump according to the relationship between the current rotating speed of the first water pump and the maximum rotating speed of the first water pump, so that the first water pump is not adjusted to a higher rotating speed when the rotating speed of the first water pump cannot be adjusted any more, thereby ensuring the effectiveness of the control action of the controller and ensuring that the air can be effectively eliminated.

[0012] Optionally, the target information comprises a current temperature of the target component, and the adjusting the rotating speeds of the first water pump and / or the second water pump based on the target information comprises:

[0013] in a case where the current temperature of the target component is greater than a preset temperature, increasing the rotating speed of the first water pump or simultaneously increasing the rotating speeds of the first water pump and the second water pump and the increasing amplitude of the rotating speed of the first water pump is greater than the increasing amplitude of the rotating speed of the second water pump;

[0014] in a case where the current temperature of the target component is less than or equal to the preset temperature, decreasing the rotating speed of the second water pump or simultaneously decreasing the rotating speeds of the first water pump and the second water pump and the decreasing amplitude of the rotating speed of the first water pump is less than the decreasing amplitude of the rotating speed of the second water pump.

[0015] The embodiment increases the rotating speed of the first water pump or simultaneously increases the rotating speeds of the first water pump and the second water pump and the increasing amplitude of the rotating speed of the first water pump is greater than the increasing amplitude of the rotating speed of the second water pump in a case where the current temperature of the target component is greater than a preset temperature, so that the cooling capacity of the cooling system is increased when the cooling demand of the target component is high, thereby meeting the cooling demand of the target component, and the rotating speed of the second water pump is decreased or the rotating speeds of the first water pump and the second water pump are simultaneously decreased and the decreasing amplitude of the rotating speed of the first water pump is less than the decreasing amplitude of the rotating speed of the second water pump in a case where the current temperature of the target component is less than or equal to the preset temperature, so that the energy consumption of the cooling system is reduced when the cooling demand of the target component is low.

[0016] Optionally, the obtaining the target information based on which the rotating speed adjustment action is performed comprises:

[0017] in a case where the current air content indicates that there is air in the cooling liquid, determining whether the current air content is greater than a preset content;

[0018] in a case where the current air content is greater than the preset content, obtaining the target information;

[0019] When the current air content is less than or equal to the preset content, the air content of the coolant flowing through the second water pump is obtained again after the preset time period ends, and when the air content obtained again is greater than or equal to the current air content, the target information is obtained.

[0020] In the case where there is air in the coolant, this embodiment further determines whether to immediately obtain the target information by judging whether the current air content is greater than the preset content, thereby reducing the number of times the speed of the first water pump and the second water pump is adjusted while avoiding idling of the second water pump to avoid frequent adjustment of the speed.

[0021] Optionally, obtaining the current air content of the coolant flowing through the second water pump includes:

[0022] obtaining the current conductivity of the coolant flowing through the second water pump;

[0023] Based on the current electrical conductivity, the current air content is determined.

[0024] This embodiment determines the current air content by the current conductivity of the coolant, which can achieve accurate collection of the air content, thereby improving the accuracy of the cooling system's control over the rotational speeds of the first water pump and the second water pump.

[0025] Optionally, determining the current air content based on the current conductivity includes:

[0026] Obtaining the current temperature of the coolant;

[0027] Determining a target mapping relationship corresponding to the current temperature of the coolant from a plurality of preset mapping relationships, wherein the preset mapping relationships include correspondences between different electrical conductivities and different air contents;

[0028] The air content corresponding to the current electrical conductivity in the target mapping relationship is determined as the current air content.

[0029] In this embodiment, when determining the current air content based on the current conductivity, a target mapping relationship corresponding to the current coolant temperature is first determined based on the current coolant temperature, which can improve the accuracy of the air content determination.

[0030] Optionally, before obtaining the current air content of the coolant flowing through the second water pump, the method further includes:

[0031] Obtaining a required flow rate of coolant in the cooling system;

[0032] estimating a first power consumption of the cooling system corresponding to the required flow rate under a first operating condition, and estimating a second power consumption of the cooling system corresponding to the required flow rate under a second operating condition; wherein the first operating condition includes an operating condition in which the first water pump or the second water pump is turned on, and the second operating condition includes an operating condition in which both the first water pump and the second water pump are turned on;

[0033] When the first power consumption is greater than the second power consumption, controlling the cooling system to be in the second operating state;

[0034] The obtaining of the current air content of the coolant flowing through the second water pump includes:

[0035] When the cooling system is in the second operating condition, a current air content of the coolant flowing through the second water pump is obtained.

[0036] In this embodiment, the current air content of the coolant is obtained only when the cooling system is in the second operating condition, which can effectively shorten the time for monitoring the air content, thereby reducing the energy consumption of the cooling system.

[0037] According to a second aspect of an embodiment of the present application, a system for preventing a water pump from idling is provided. The system is applied to a cooling system of a vehicle, the cooling system being used to cool a target component. The cooling system includes a first water pump and a second water pump connected in series, the first water pump being located upstream of the second water pump. The system includes:

[0038] a first acquisition module, configured to acquire a current air content of the coolant flowing through the second water pump;

[0039] a second acquisition module, configured to acquire target information based on which the speed adjustment action is performed when the current air content indicates that air exists in the coolant, the target information including the current speed of the first water pump and / or the current temperature of the target component;

[0040] an execution module, configured to adjust the rotational speed of the first water pump and / or the second water pump based on the target information, so that the speed difference between the first water pump and the second water pump after the adjustment is greater than the speed difference between the first water pump and the second water pump before the adjustment.

[0041] According to a third aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the steps of the method for preventing the water pump from idling as described in the second aspect of the present application are implemented.

[0042] The fourth aspect of the embodiments of the present application provides a vehicle, comprising the system for preventing the water pump from idling as described in the second aspect of the embodiments of the present application, or comprising a control module, wherein the control module is used to implement the steps of the method for preventing the water pump from idling as described in the first aspect of the embodiments of the application.

[0043] The present application provides a method, system, storage medium and vehicle for preventing a water pump from idling, the method comprising: obtaining a current air content of the coolant flowing through the second water pump; when the current air content indicates the presence of air in the coolant, obtaining target information on which a speed adjustment action is based, the target information comprising the current speed of the first water pump and / or the current temperature of the target component; and adjusting the speed of the first water pump and / or the second water pump based on the target information so that the speed difference between the first water pump and the second water pump after the adjustment is greater than the speed difference between the first water pump and the second water pump before the adjustment.

[0044] In the case of air in the coolant, the present application first acquires target information. The target information includes at least one of the current rotational speed of the first water pump and the current temperature of the target component. Subsequently, based on the target information, the rotational speeds of the first water pump and the second water pump are adjusted to increase the difference between the adjusted rotational speeds of the first water pump and the second water pump, thereby increasing the amount of coolant flowing between the first water pump and the second water pump per unit time. The increased coolant squeezes out the air between the first water pump and the second water pump, thereby effectively preventing the water pumps from idling. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 This is a step diagram of a method for preventing a water pump from idling provided by an embodiment of the present application;

[0047] Figure 2 This is a schematic structural diagram of a cooling system provided in an embodiment of the present application;

[0048] Figure 3 This is a step diagram of a method for obtaining target information provided by an embodiment of the present application;

[0049] Figure 4 This is a step diagram of a method for obtaining air content provided in an embodiment of the present application.

[0050] Figure 5 This is another method step diagram for obtaining air content provided in an embodiment of the present application;

[0051] Figure 6 This is a step diagram of a cooling system operating condition control method provided by an embodiment of the present application;

[0052] Figure 7 This is a flow chart of a method for preventing a water pump from idling provided by an embodiment of the present application;

[0053] Figure 8 This is a structural diagram of a system for preventing a water pump from idling provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0055] A water pump is a device installed in a pipeline to drive the flow of liquid within it. In a vehicle's cooling system, two water pumps can be connected in series to increase the coolant's head. However, when two water pumps are connected in series to drive the coolant flow, the speed difference between the two pumps can cause bubbles to form in the coolant, leading to idling of the water pumps.

[0056] Based on this, in order to solve the problem of how to prevent the water pump from idling, the present application provides a method, system, storage medium and vehicle for preventing the water pump from idling. When there is air in the coolant, the target information is first acquired. The target information includes at least one of the current rotational speed of the first water pump and the current temperature of the target component. Subsequently, based on the target information, the rotational speeds of the first water pump and the second water pump are adjusted to increase the difference between the adjusted rotational speed of the first water pump and the adjusted rotational speed of the second water pump, thereby increasing the coolant flowing between the first water pump and the second water pump per unit time, and squeezing out the air between the first water pump and the second water pump by the increased coolant, thereby effectively preventing the water pump from idling. The method for preventing the water pump from idling described in the present application is as follows:

[0057] The first aspect of this application proposes an embodiment, such as Figure 1 A method for preventing a water pump from idling is shown in a step diagram, wherein the method is applied to a cooling system of a vehicle, and more particularly to a controller of the cooling system. The cooling system is used to cool a target component.

[0058] refer to Figure 2A structural schematic diagram of a cooling system is shown, the cooling system comprising a first water pump and a second water pump connected in series, the first water pump being located upstream of the second water pump, and a controller being in communication connection with the first water pump and the second water pump respectively. The target component can be cooled by the coolant in the coolant pipeline between the first water pump and the second water pump, by the coolant in the coolant pipeline upstream of the first water pump, or by the coolant in the coolant pipeline downstream of the second water pump.

[0059] The first water pump and the second water pump are connected in series by a coolant pipeline, and the coolant pipeline contains coolant. The first water pump is located upstream of the second water pump in structure, which is embodied by connecting the outlet of the first water pump with the inlet of the second water pump. This structure makes the coolant flowing out of the first water pump flow into the second water pump again, so that the first water pump is located upstream of the second water pump. In the case that the cooling system has multiple water pumps, the first water pump and the second water pump can be any two of the multiple water pumps.

[0060] In an optional embodiment, the target component can be a drive motor of a front axle, a drive motor of a rear axle, an on-board charger, an on-board DC power converter, a power distribution unit, etc.

[0061] In an optional embodiment, referring to Figure 2 , the cooling system can further comprise a radiator, a fan, and a three-way valve. The connection relationship between the radiator, the fan, and the three-way valve and the first water pump and the second water pump can refer to Figure 2 , and will not be described herein again. It is worth noting that the radiator, the three-way valve, the target component, the first water pump, and the second water pump are all connected by the coolant pipeline.

[0062] The main steps of the method include:

[0063] In step S101, the current air content of the coolant flowing through the second water pump is obtained.

[0064] The air content of the coolant refers to the ratio between the volume of air and the volume of coolant in a unit volume of coolant pipeline, or the ratio between the volume of air and a unit volume. The higher the air content of the coolant, the larger the space occupied by air in the coolant pipeline; the lower the air content of the coolant, the smaller the space occupied by air in the coolant pipeline.

[0065] In an optional embodiment, the current air content of the coolant can be determined based on the current rotational speed of the second water pump. Specifically, a target rotational speed of the second water pump corresponding to the target output power is first determined when the air content of the coolant is zero. Subsequently, during the actual operation of the second water pump, the actual rotational speed of the second water pump at the target output power is obtained, and the air content of the coolant is determined based on the difference between the target rotational speed and the actual rotational speed. The larger the difference between the target rotational speed and the actual rotational speed, the higher the current air content of the coolant; the smaller the ratio between the target rotational speed and the actual rotational speed, the lower the current air content of the coolant.

[0066] Step S102 : When the current air content indicates that there is air in the coolant, target information based on which a speed regulation action is performed is acquired.

[0067] The target information includes the current rotation speed of the first water pump and / or the current temperature of the target component.

[0068] The target information may include the current rotation speed of the first water pump, or the current temperature of the target component, or the current rotation speed of the first water pump and the current temperature of the target component.

[0069] When the water pump is rotating, it is mainly used to drive the coolant flow in the coolant pipe. Therefore, water pump idling refers to the working condition where the kinetic energy generated by the rotation of the water pump is not fully used to drive the flow of coolant.

[0070] If the current air content indicates the presence of air in the coolant, this indicates that part of the kinetic energy generated by the rotation of the second water pump is being used to drive the air flow in the coolant. In other words, if the current air content indicates the presence of air in the coolant, this indicates that the second water pump is idling. Therefore, target information should be acquired to begin eliminating the air in the coolant.

[0071] In an optional embodiment, the current speed of the first water pump can be obtained by a speed sensor provided on the first water pump and connected to the controller, and the current temperature of the target component can be obtained by a temperature sensor provided on the target component and connected to the controller.

[0072] In an optional embodiment, when the current air content is greater than a preset value, such as 0% or 2%, it can be considered that the current air content indicates that air exists in the coolant.

[0073] Step S103: Based on the target information, adjust the speed of the first water pump and / or the second water pump so that the speed difference between the first water pump and the second water pump after the adjustment is greater than the speed difference between the first water pump and the second water pump before the adjustment.

[0074] The speed of the first water pump or the second water pump can be adjusted, or the speeds of the first water pump and the second water pump can be adjusted simultaneously. When the speed of the first water pump or the second water pump is adjusted, the speed of the first water pump can be increased or the speed of the second water pump can be decreased.

[0075] When adjusting the speeds of the first water pump and the second water pump at the same time, the speed of the first water pump can be increased and the speed of the second water pump can be decreased, or the speeds of the first water pump and the second water pump can be increased at the same time but the increase amplitude of the first water pump is greater than the increase amplitude of the second water pump, or the speeds of the first water pump and the second water pump can be decreased at the same time but the decrease amplitude of the first water pump is smaller than the decrease amplitude of the second water pump.

[0076] In an optional embodiment, when the current speed of the first water pump is less than the maximum speed of the first water pump and the current temperature of the target component is greater than the preset temperature, the speed of the first water pump can be increased; when the current speed of the first water pump is equal to the maximum speed of the first water pump and the current temperature of the target component is less than or equal to the preset temperature, the speed of the second water pump can be decreased; when the current speed of the first water pump is less than the maximum speed of the first water pump and the current temperature of the target component is less than or equal to the preset temperature, it is determined to increase the speed of the first water pump and decrease the speed of the second water pump.

[0077] When the difference between the regulated rotational speeds of the first water pump and the second water pump increases, the flow rate of the coolant flowing into the second water pump per unit time increases, thereby squeezing the air out of the coolant.

[0078] In an optional embodiment, when the speed of the first water pump is increased, the controller may send a speed increase signal to the first water pump, thereby causing the first water pump to increase its speed under the instruction of the speed increase signal. When the speed of the first water pump is decreased, the controller may send a speed decrease signal to the second water pump, thereby causing the second water pump to decrease its speed under the instruction of the speed decrease signal.

[0079] In this embodiment, when air is present in the coolant, target information is first acquired. The target information includes at least one of the current rotational speed of the first water pump and the current temperature of the target component. Subsequently, based on the target information, the rotational speeds of the first and second water pumps are adjusted to increase the difference between the adjusted rotational speeds of the first and second water pumps. This increases the amount of coolant flowing between the first and second water pumps per unit time. This increased coolant displaces the air between the first and second water pumps, effectively preventing the water pumps from idling.

[0080] Optionally, the target information includes a current rotation speed of the first water pump. Adjusting the rotation speed of the first water pump and / or the second water pump based on the target information in step S103 specifically includes the following two situations:

[0081] In case 1, when the current rotation speed is less than the maximum rotation speed of the first water pump, the rotation speed of the first water pump is increased.

[0082] In the second case, when the current rotation speed is equal to the maximum rotation speed, the rotation speed of the second water pump is reduced.

[0083] The maximum speed of the first water pump refers to the maximum speed that the first water pump can reach during operation. The maximum speed can be the maximum speed that can be achieved within the limitations of the first water pump's own structure, or the maximum speed that can be achieved within the limitations set by the system.

[0084] When the current speed of the first water pump is less than the maximum speed of the first water pump, it indicates that there is still room for the speed of the first water pump to be increased, so the speed of the first water pump can be increased; when the current speed of the first water pump is equal to the maximum speed of the first water pump, it indicates that there is no room for the speed of the first water pump to be increased, so the speed of the second water pump should be lowered.

[0085] In an optional embodiment, when the current rotation speed is less than the maximum rotation speed of the first water pump, the rotation speed of the second water pump may be reduced while the rotation speed of the first water pump is increased, thereby increasing the air elimination rate.

[0086] This embodiment adjusts the rotational speeds of the first water pump and the second water pump according to the relationship between the current rotational speed of the first water pump and the maximum rotational speed of the first water pump. This can prevent the cooling system from increasing the rotational speed of the first water pump when the rotational speed of the first water pump cannot be further adjusted, thereby ensuring the effectiveness of the controller's control action and ensuring that air can be effectively eliminated.

[0087] Optionally, the target information includes the current temperature of the target component. Adjusting the speed of the first water pump and / or the second water pump based on the target information in step S103 may specifically include the following two situations:

[0088] Case three: when the current temperature of the target component is greater than the preset temperature, the speed of the first water pump is increased, or the speeds of the first water pump and the second water pump are increased at the same time and the speed increase of the first water pump is greater than the speed increase of the second water pump.

[0089] Case 4: When the current temperature of the target component is less than or equal to the preset temperature, the speed of the second water pump is reduced, or the speeds of the first water pump and the second water pump are reduced at the same time and the speed reduction amplitude of the first water pump is smaller than the speed reduction amplitude of the second water pump.

[0090] The current temperature of the target component actually represents the cooling requirement of the target component. When the current temperature of the target component is greater than the preset temperature, it indicates that the cooling requirement of the target component is large; when the current temperature of the target component is less than the preset temperature, it indicates that the cooling requirement of the target component is small.

[0091] The cooling capacity of the cooling system is also related to the coolant head, which in turn is related to the speed of the first and second water pumps. The higher the speeds of the first and second water pumps, the greater the coolant head and the higher the cooling capacity of the cooling system. The lower the speeds of the first and second water pumps, the lower the coolant head and the lower the cooling capacity of the cooling system.

[0092] Therefore, when the current temperature of the target component is greater than the preset temperature, the speed of the first water pump is increased, or the speeds of the first water pump and the second water pump are increased at the same time and the speed increase amplitude of the first water pump is greater than the speed increase amplitude of the second water pump. When the cooling demand of the target component is high, the cooling capacity of the cooling system can be increased to meet the cooling demand of the target component. When the current temperature of the target component is less than or equal to the preset temperature, the speed of the second water pump is reduced, or the speeds of the first water pump and the second water pump are reduced at the same time and the speed reduction amplitude of the first water pump is less than the speed reduction amplitude of the second water pump. When the cooling demand of the target component is low, the energy consumption of the cooling system can be reduced.

[0093] In an optional embodiment, the preset temperature may be 90 degrees Celsius, or may be determined according to different optimal operating temperature ranges of different target components.

[0094] Optionally, refer to Figure 3 A method for obtaining target information is shown in the step diagram. In step S102, when the current air content indicates that there is air in the coolant, the target information based on which the speed adjustment action is performed is obtained, specifically including the following steps:

[0095] Step S1021 : When the current air content indicates that air exists in the coolant, it is determined whether the current air content is greater than a preset content.

[0096] When the current air content is greater than the preset content, the process proceeds to step S1022 ; when the current air content is less than or equal to the preset content, the process proceeds to step S1023 .

[0097] Step S1022: Acquire the target information.

[0098] Step S1023: After the preset time period ends, the air content of the coolant flowing through the second water pump is obtained again, and when the air content obtained again is greater than or equal to the current air content, the target information is obtained.

[0099] If air is present in the coolant, the degree of idling of the second water pump can be determined by determining whether the current air content is greater than a preset content. If the current air content is greater than the preset content, it indicates that the second water pump is idling to a serious degree. In this case, target information based on which the speed adjustment action is performed should be immediately obtained, and then steps S103 and S104 should be further executed based on the target information to eliminate the air in the coolant.

[0100] If the current air content is less than or equal to the preset content, it indicates that the second water pump is idling slightly. A preset timer may be started. After the preset timer expires, the air content of the coolant flowing through the second water pump is again obtained. The current air content is compared with the obtained air content to determine whether the idling of the second water pump has worsened.

[0101] When the re-acquired air content is less than the current air content, it can be considered that the idling situation of the second water pump is on the decline, so the method described in this application can be terminated without adjusting the rotation speeds of the first water pump and the second water pump.

[0102] When the air content obtained again is greater than or equal to the current air content, it is considered that the idling situation of the second water pump is on the rise, so the target information should be obtained, and then steps S103 and S104 are further executed based on the target information to eliminate the air in the coolant.

[0103] In the case where there is air in the coolant, this embodiment further determines whether to immediately obtain the target information by judging whether the current air content is greater than the preset content, thereby reducing the number of times the speed of the first water pump and the second water pump is adjusted while avoiding idling of the second water pump to avoid frequent adjustment of the speed.

[0104] Optionally, refer to Figure 4The figure shows a method for obtaining air content, wherein step S101 of obtaining the current air content of the coolant flowing through the second water pump specifically includes the following steps:

[0105] Step S1011: Acquire the current conductivity of the coolant flowing through the second water pump.

[0106] Step S1012: determining the current air content based on the current conductivity.

[0107] Since the electrical conductivity of air is much lower than that of coolant, the electrical conductivity of the coolant will be greatly reduced after the air is mixed into the coolant. Therefore, the current air content of the coolant can be determined by the current electrical conductivity of the second water pump.

[0108] In an optional embodiment, a conductivity sensor can be installed at the water inlet of the second water pump to measure the current conductivity of the coolant flowing through the second water pump. A controller is connected to the conductivity sensor and, after receiving the current coolant conductivity transmitted by the conductivity sensor, compares it with a preset baseline coolant conductivity value in the absence of air to determine the current air content of the coolant.

[0109] This embodiment determines the current air content by the current conductivity of the coolant, which can achieve accurate collection of the air content, thereby improving the accuracy of the cooling system's control over the rotational speeds of the first water pump and the second water pump.

[0110] Optionally, refer to Figure 5 Another method for obtaining air content is shown in the step diagram, wherein step S1012 determines the current air content based on the current conductivity, further comprising the following steps:

[0111] Step S11, obtaining the current temperature of the coolant.

[0112] Step S12: determining a target mapping relationship corresponding to the current temperature of the coolant from a plurality of preset mapping relationships.

[0113] The preset mapping relationship includes a correspondence between different electrical conductivities and different air contents.

[0114] Step S13: determining the air content corresponding to the current conductivity in the target mapping relationship as the current air content.

[0115] Coolant conductivity is affected not only by air content but also by coolant temperature. The lower the coolant temperature, the faster the conductivity changes with temperature; the higher the coolant temperature, the slower the conductivity changes with temperature. Therefore, when determining the current air content based on the current conductivity, it's necessary to first determine the target mapping relationship corresponding to the current coolant temperature to accurately determine the air content.

[0116] In an optional embodiment, a plurality of preset mapping relationships may be pre-stored in a storage unit of the controller. The preset mapping relationship may be a mapping relationship table or a mapping relationship formula.

[0117] Optionally, refer to Figure 6 A step diagram of a cooling system operating condition control method is shown. Before obtaining the current air content of the coolant flowing through the second water pump in step S101, the method further includes the following steps:

[0118] Step S105: obtaining the required flow rate of the coolant of the cooling system.

[0119] Step S106 , estimating a first power consumption of the cooling system corresponding to the required flow rate under a first operating condition, and estimating a second power consumption of the cooling system corresponding to the required flow rate under a second operating condition.

[0120] The first operating condition includes a condition where the first water pump or the second water pump is turned on, and the second operating condition includes a condition where the first water pump and the second water pump are turned on at the same time.

[0121] Step S107 : When the first power consumption is greater than the second power consumption, controlling the cooling system to be in the second operating state.

[0122] Step S101 specifically includes: when the cooling system is in the second operating condition, obtaining the current air content of the coolant flowing through the second water pump.

[0123] Since the temperature of the target component determines the cooling requirement of the target component and the flow rate of the coolant determines the cooling capacity of the cooling system, the required flow rate of the coolant can be determined according to the temperature of the target component.

[0124] Since the first water pump and the second water pump are usually water pumps with the same rated power, when estimating the first power consumption of the cooling system corresponding to the required flow rate under the first working condition, the calculation can be based on either the first water pump or the second water pump.

[0125] Taking the first water pump as an example, when the first power consumption is estimated, the output rotating speed that the first water pump should have to meet the demand flow can be determined according to the demand flow, and then the energy conversion efficiency of the first water pump can be determined according to the output rotating speed, and finally the first power consumption can be determined.

[0126] When the second power consumption is estimated, the output rotating speed that the first water pump and the second water pump should have to meet the demand flow can be determined according to the demand flow, and then the energy conversion efficiency of the first water pump and the second water pump can be determined according to the output rotating speed of the first water pump and the second water pump, respectively, and then the power consumption of the first water pump and the second water pump can be determined, respectively, and the sum of the power consumption of the first water pump and the second water pump is determined as the second power consumption.

[0127] After the first power consumption and the second power consumption are determined, the first power consumption and the second power consumption are compared. If the first power consumption is less than or equal to the second power consumption, the cooling system is controlled to be in the first working condition; if the first power consumption is greater than the second power consumption, the cooling system is controlled to be in the second working condition.

[0128] The embodiment obtains the current air content of the cooling liquid only when the cooling system is in the second working condition, which can effectively shorten the time length of air content monitoring, thereby reducing the energy consumption of the cooling system.

[0129] Based on the above embodiment, reference Figure 7 A flowchart of a method for preventing water pump idling is shown, and the method for preventing water pump idling described in the present application will be exemplarily described below:

[0130] The method for preventing water pump idling described in the present application is applied to a cooling system of a vehicle, and is particularly applied to a controller of the cooling system. The cooling system is used to cool target components. The cooling system includes a first water pump and a second water pump connected in series, the first water pump is located upstream of the second water pump, and the controller is in communication connection with the first water pump and the second water pump, respectively. The method specifically includes the following steps:

[0131] At the beginning of the method, the demand flow of the cooling liquid of the cooling system is obtained, and the first power consumption corresponding to the demand flow in the first working condition of the cooling system is estimated, and the second power consumption corresponding to the demand flow in the second working condition of the cooling system is estimated. The first working condition includes the working condition of starting the first water pump or the second water pump, and the second working condition includes the working condition of starting the first water pump and the second water pump at the same time.

[0132] In the case that the first power consumption is less than or equal to the second power consumption, the cooling system is controlled to be in the first working condition, and the method described in the present application is ended.

[0133] In a case where the first power consumption is greater than the second power consumption, the cooling system is controlled to be in the second working condition, and then the current electrical conductivity of the cooling liquid flowing through the second water pump and the current temperature of the cooling liquid are obtained.

[0134] Subsequently, a target mapping relationship corresponding to the current temperature of the cooling liquid is determined from a plurality of preset mapping relationships, and an air content corresponding to the current electrical conductivity in the target mapping relationship is determined as the current air content. The preset mapping relationships include a corresponding relationship between different electrical conductivities and different air contents.

[0135] After obtaining the current air content of the cooling liquid, it is determined whether the current air content indicates that there is air in the cooling liquid. In a case where the current air content indicates that there is no air in the cooling liquid, the method described in the present application is ended.

[0136] In a case where the current air content indicates that there is air in the cooling liquid, it is determined whether the current air content is greater than a preset content. In a case where the current air content is greater than the preset content, target information is obtained. In a case where the current air content is less than or equal to the preset content, the air content of the cooling liquid flowing through the second water pump is obtained again after the preset time length is counted.

[0137] In a case where the air content obtained again is less than the current air content, the method described in the present application is ended. In a case where the air content obtained again is greater than or equal to the current air content, target information is obtained. The target information can include the current speed of the first water pump, or the current temperature of a target component, or the current speed of the first water pump and the current temperature of the target component.

[0138] Subsequently, the speeds of the first water pump and the second water pump are adjusted based on the target information. Specifically, taking the case where the target information includes the current speed of the first water pump as an example, in a case where the current speed is less than the maximum speed of the first water pump, the speed of the first water pump is increased; in a case where the current speed is equal to the maximum speed, the speed of the second water pump is decreased. Or, taking the case where the target information includes the current temperature of the target component as an example, in a case where the current temperature of the target component is greater than a preset temperature, the speed of the first water pump is increased, or the speeds of the first water pump and the second water pump are both increased and the increase amplitude of the speed of the first water pump is greater than the increase amplitude of the speed of the second water pump; in a case where the current temperature of the target component is less than or equal to the preset temperature, the speed of the second water pump is decreased, or the speeds of the first water pump and the second water pump are both decreased and the decrease amplitude of the speed of the first water pump is less than the decrease amplitude of the speed of the second water pump.

[0139] Based on the same inventive concept, the application also provides a system for preventing water pump idling, which is applied to a cooling system of a vehicle, the cooling system being used for cooling a target component, the cooling system comprising a first water pump and a second water pump connected in series, the first water pump being located upstream of the second water pump;

[0140] As Figure 8 A system for preventing water pump idling is shown in a structural schematic diagram, which comprises:

[0141] A first obtaining module is configured to obtain a current air content of cooling liquid flowing through the second water pump;

[0142] A second obtaining module is configured to, in a case where the current air content indicates that there is air in the cooling liquid, obtain target information based on which a rotation speed adjustment action is performed, the target information comprising a current rotation speed of the first water pump and / or a current temperature of the target component;

[0143] An executing module is configured to, based on the target information, adjust the rotation speed of the first water pump and / or the second water pump, so that the rotation speed difference between the first water pump and the second water pump after the adjustment is greater than the rotation speed difference between the first water pump and the second water pump before the adjustment.

[0144] Optionally, the target information comprises the current rotation speed of the first water pump, and the executing module is specifically configured to, in a case where the current rotation speed is less than a maximum rotation speed of the first water pump, increase the rotation speed of the first water pump; and in a case where the current rotation speed is equal to the maximum rotation speed, decrease the rotation speed of the second water pump.

[0145] Optionally, the target information comprises the current temperature of the target component, and the executing module is specifically configured to, in a case where the current temperature of the target component is greater than a preset temperature, increase the rotation speed of the first water pump, or simultaneously increase the rotation speed of the first water pump and the second water pump and the increase amplitude of the rotation speed of the first water pump is greater than the increase amplitude of the rotation speed of the second water pump; and in a case where the current temperature of the target component is less than or equal to the preset temperature, decrease the rotation speed of the second water pump, or simultaneously decrease the rotation speed of the first water pump and the second water pump and the decrease amplitude of the rotation speed of the first water pump is less than the decrease amplitude of the rotation speed of the second water pump.

[0146] Optionally, the second acquisition module is specifically used to determine whether the current air content is greater than a preset content when the current air content indicates that there is air in the coolant; to acquire the target information when the current air content is greater than the preset content; to acquire the air content of the coolant flowing through the second water pump again after the preset time period ends when the current air content is less than or equal to the preset content; and to acquire the target information when the air content acquired again is greater than or equal to the current air content.

[0147] Optionally, the first acquisition module is specifically configured to acquire a current conductivity of the coolant flowing through the second water pump; and determine the current air content based on the current conductivity.

[0148] Optionally, the first acquisition module is specifically used to obtain the current temperature of the coolant; determine a target mapping relationship corresponding to the current temperature of the coolant from multiple preset mapping relationships, the preset mapping relationship including the correspondence between different electrical conductivities and different air contents; and determine the air content corresponding to the current electrical conductivity in the target mapping relationship as the current air content.

[0149] Optionally, the system further includes a working condition control module, configured to obtain a required flow rate of coolant of the cooling system; estimate a first power consumption of the cooling system corresponding to the required flow rate under a first working condition, and estimate a second power consumption of the cooling system corresponding to the required flow rate under a second working condition; wherein the first working condition includes a working condition in which the first water pump or the second water pump is turned on, and the second working condition includes a working condition in which the first water pump and the second water pump are turned on simultaneously; and when the first power consumption is greater than the second power consumption, controlling the cooling system to be in the second working condition;

[0150] The first acquisition module is specifically configured to acquire a current air content of the coolant flowing through the second water pump when the cooling system is in the second operating condition.

[0151] An embodiment of the present application further provides a computer-readable storage medium having a computer program / instruction stored thereon. When the computer program / instruction is executed by a processor, a method for preventing a water pump from idling as disclosed in an embodiment of the present application is implemented.

[0152] An embodiment of the present application further provides a vehicle, comprising a system for preventing a water pump from idling provided in the present application, or comprising a control module, wherein the control module is used to implement the steps of the method for preventing a water pump from idling described in the embodiment of the present application.

[0153] The present application provides a method, system, storage medium and vehicle for preventing a water pump from idling, the method comprising: obtaining a current air content of the coolant flowing through the second water pump; when the current air content indicates the presence of air in the coolant, obtaining target information on which a speed adjustment action is based, the target information comprising the current speed of the first water pump and / or the current temperature of the target component; and adjusting the speed of the first water pump and / or the second water pump based on the target information so that the speed difference between the first water pump and the second water pump after the adjustment is greater than the speed difference between the first water pump and the second water pump before the adjustment.

[0154] In the case of air in the coolant, the present application first acquires target information. The target information includes at least one of the current rotational speed of the first water pump and the current temperature of the target component. Subsequently, based on the target information, the rotational speeds of the first water pump and the second water pump are adjusted to increase the difference between the adjusted rotational speeds of the first water pump and the second water pump, thereby increasing the amount of coolant flowing between the first water pump and the second water pump per unit time. The increased coolant squeezes out the air between the first water pump and the second water pump, thereby effectively preventing the water pumps from idling.

[0155] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0156] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, systems, electronic devices, and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0157] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0158] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0159] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0160] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0161] The above is a detailed introduction to the method, system, storage medium and vehicle for preventing water pump idling provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for preventing a water pump from idling, characterized in that: The method is applied to a cooling system of a vehicle, the cooling system being used to cool a target component, the cooling system comprising a first water pump and a second water pump connected in series, the first water pump being located upstream of the second water pump; the method comprising: obtaining a current air content of the coolant flowing through the second water pump; When the current air content indicates that air exists in the coolant, obtaining target information based on which the speed adjustment action is performed, the target information including the current speed of the first water pump and / or the current temperature of the target component; adjusting the speed of the first water pump and / or the second water pump based on the target information so that a speed difference between the first water pump and the second water pump after the adjustment is greater than a speed difference between the first water pump and the second water pump before the adjustment; The target information includes a current temperature of the target component, and adjusting the speed of the first water pump and / or the second water pump based on the target information includes: When the current temperature of the target component is greater than a preset temperature, increasing the speed of the first water pump, or increasing the speeds of the first water pump and the second water pump at the same time with the speed increase of the first water pump being greater than the speed increase of the second water pump; When the current temperature of the target component is less than or equal to the preset temperature, the speed of the second water pump is reduced, or the speeds of the first water pump and the second water pump are reduced at the same time and the speed reduction amplitude of the first water pump is smaller than the speed reduction amplitude of the second water pump.

2. The method for preventing a water pump from idling according to claim 1, wherein: The target information includes a current rotation speed of the first water pump, and adjusting the rotation speed of the first water pump and / or the second water pump based on the target information includes: When the current rotation speed is less than the maximum rotation speed of the first water pump, increasing the rotation speed of the first water pump; When the current rotational speed is equal to the maximum rotational speed, the rotational speed of the second water pump is reduced.

3. The method for preventing a water pump from idling according to claim 1, wherein: When the current air content indicates that air exists in the coolant, obtaining target information based on which the speed adjustment action is performed includes: When the current air content indicates that air exists in the coolant, determining whether the current air content is greater than a preset content; When the current air content is greater than the preset content, acquiring the target information; When the current air content is less than or equal to the preset content, the air content of the coolant flowing through the second water pump is obtained again after the preset time period ends, and when the air content obtained again is greater than or equal to the current air content, the target information is obtained.

4. The method for preventing a water pump from idling according to claim 1, wherein: The obtaining of the current air content of the coolant flowing through the second water pump includes: obtaining the current conductivity of the coolant flowing through the second water pump; Based on the current electrical conductivity, the current air content is determined.

5. The method for preventing a water pump from idling according to claim 4, characterized in that: The determining the current air content based on the current conductivity includes: Obtaining the current temperature of the coolant; Determining a target mapping relationship corresponding to the current temperature of the coolant from a plurality of preset mapping relationships, wherein the preset mapping relationships include correspondences between different electrical conductivities and different air contents; The air content corresponding to the current electrical conductivity in the target mapping relationship is determined as the current air content.

6. The method for preventing a water pump from idling according to claim 1, wherein: Before obtaining the current air content of the coolant flowing through the second water pump, the method further includes: Obtaining a required flow rate of coolant in the cooling system; estimating a first power consumption of the cooling system corresponding to the required flow rate under a first operating condition, and estimating a second power consumption of the cooling system corresponding to the required flow rate under a second operating condition; wherein the first operating condition includes an operating condition in which the first water pump or the second water pump is turned on, and the second operating condition includes an operating condition in which both the first water pump and the second water pump are turned on; When the first power consumption is greater than the second power consumption, controlling the cooling system to be in the second operating state; The obtaining of the current air content of the coolant flowing through the second water pump includes: When the cooling system is in the second operating condition, a current air content of the coolant flowing through the second water pump is obtained.

7. A system for preventing a water pump from idling, characterized in that: The system for preventing water pump idling is applied to a cooling system of a vehicle, wherein the cooling system is used to cool a target component, and the cooling system comprises a first water pump and a second water pump connected in series, wherein the first water pump is located upstream of the second water pump; The system for preventing the water pump from idling comprises: a first acquisition module, configured to acquire a current air content of the coolant flowing through the second water pump; a second acquisition module, configured to acquire target information based on which the speed adjustment action is performed when the current air content indicates that air exists in the coolant, the target information including the current speed of the first water pump and / or the current temperature of the target component; an execution module, configured to adjust a rotational speed of the first water pump and / or the second water pump based on the target information, so that a speed difference between the first water pump and the second water pump after the adjustment is greater than a speed difference between the first water pump and the second water pump before the adjustment; Wherein, the target information includes the current temperature of the target component; The execution module is also used to increase the speed of the first water pump when the current temperature of the target component is greater than a preset temperature, or to increase the speeds of the first water pump and the second water pump at the same time and the speed increase of the first water pump is greater than the speed increase of the second water pump; and to reduce the speed of the second water pump when the current temperature of the target component is less than or equal to the preset temperature, or to reduce the speeds of the first water pump and the second water pump at the same time and the speed reduction of the first water pump is less than the speed reduction of the second water pump.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method for preventing a water pump from idling according to any one of claims 1 to 6 are implemented.

9. A vehicle, characterized in that: The invention comprises the system for preventing the water pump from idling as claimed in claim 7, or comprises a control module, wherein the control module is used to implement the steps of the method for preventing the water pump from idling as claimed in any one of claims 1 to 6.

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