Method and system for preventing idling of water pump, storage medium and vehicle

Abstract

The invention provides a method and system for preventing a water pump from idling, a storage medium and a vehicle, and belongs to the technical field of vehicles. The method for preventing the water pump from idling comprises the steps that the current air content of cooling liquid flowing through a second water pump is obtained; under the condition that the current air content indicates that air exists in the cooling liquid, target information is obtained, and the target information comprises the current rotating speed of the first water pump and / or the current temperature of the target component; and based on the target information, the rotating speed of the first water pump and / or the second water pump is adjusted, so that the rotating speed difference of the first water pump and the second water pump after adjustment is larger than the rotating speed difference of the first water pump and the second water pump before adjustment. According to the method, the cooling liquid flowing into the space between the first water pump and the second water pump in unit time can be increased, air between the first water pump and the second water pump is squeezed out through the increased cooling liquid, and therefore idling of the water pumps is effectively avoided.

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 in the pipeline. Related technology In the cooling system of a vehicle, the head of the coolant can be increased by connecting two water pumps in series. However, when two water pumps are connected in series to drive the flow of coolant, the speed difference between the two water pumps may cause bubbles to form in the coolant, which in turn causes the water pump to run idle. 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 being 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 in sequence, 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 there is air in the coolant, obtaining target information based on which the speed regulation action is performed, the target information including the current speed of the first water pump and / or the current temperature of the target component; Based on the target information, the rotational speed of the first water pump and / or the second water pump is adjusted so that the rotational speed difference between the first water pump and the second water pump after the adjustment is greater than the rotational speed difference between the first water pump and the second water pump before the adjustment.

[0005] Optionally, 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 rotation speed is equal to the maximum rotation speed, the rotation speed of the second water pump is reduced.

[0006] 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 control action of the controller and ensuring that the air can be effectively eliminated.

[0007] Optionally, the target information includes a current temperature of the target component, 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 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 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 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.

[0008] In this embodiment, 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 is 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 is reduced.

[0009] Optionally, when the current air content indicates that there is air in the coolant, obtaining target information based on which the speed regulation action is performed includes: In a case where 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.

[0010] 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.

[0011] Optionally, obtaining 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.

[0012] In this embodiment, the current air content is determined by the current conductivity of the coolant, so that the air content can be accurately collected, thereby improving the accuracy of the cooling system's control over the rotation speeds of the first water pump and the second water pump.

[0013] Optionally, 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 relationship includes a correspondence relationship between different 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.

[0014] In this embodiment, when determining the current air content based on the current conductivity, the target mapping relationship corresponding to the current temperature of the coolant is first determined according to the current temperature of the coolant, which can improve the accuracy of the air content determination.

[0015] Optionally, 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 of 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 the first water pump and the second water pump are turned on at the same time; 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.

[0016] 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.

[0017] 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 for preventing a water pump from idling is applied to a cooling system of a vehicle. The cooling system is used to cool a target component. The cooling system comprises a first water pump and a second water pump connected in series in sequence. The first water pump is located upstream of the second water pump. The system for preventing a water pump from idling comprises: A first acquisition module, used for acquiring 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 regulation 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, for adjusting the rotational speed of the first water pump and / or the second water pump based on the target information, so that the rotational speed difference between the first water pump and the second water pump after the adjustment is greater than the rotational speed difference between the first water pump and the second water pump before the adjustment.

[0018] 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 a water pump from idling as described in the second aspect of the present application are implemented.

[0019] The fourth aspect of the embodiment of the present application provides a vehicle, including the system for preventing the water pump from idling as described in the second aspect of the embodiment of the present application, or including 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 embodiment of the application.

[0020] 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 that there is air in the coolant, obtaining target information based on which a speed regulation action is performed, the target information comprising a current speed of the first water pump and / or a current temperature of the target component; based on the target information, regulating the speed of the first water pump and / or the second water pump so that a speed difference between the first water pump and the second water pump after the regulation is greater than a speed difference between the first water pump and the second water pump before the regulation.

[0021] In the case where there is air in the coolant, the present application first acquires the target information. The target information includes at least one of the current rotation speed of the first water pump and the current temperature of the target component. Subsequently, based on the target information, the rotation speeds of the first water pump and the second water pump are adjusted to increase the difference between the adjusted rotation speed of the first water pump and the adjusted rotation 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 through the increased coolant, thereby effectively preventing the water pump from idling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. 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 paying creative labor.

[0023] Figure 1 This is a step diagram of a method for preventing a water pump from idling provided in an embodiment of the present application; Figure 2 is a structural schematic diagram of a cooling system provided in an embodiment of the present application; Figure 3 This is a step diagram of a method for obtaining target information provided by an embodiment of the present application; Figure 4 This is a step diagram of a method for obtaining air content provided in an embodiment of the present application. Figure 5 is another method step diagram for obtaining air content provided in an embodiment of the present application; Figure 6 It is a step diagram of a cooling system operating condition control method provided in an embodiment of the present application; Figure 7 is a flow chart of a method for preventing a water pump from idling provided in an embodiment of the present application; Figure 8 It is a structural schematic diagram of a system for preventing a water pump from idling provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] A water pump is a device installed in a pipeline to drive the flow of liquid in the pipeline. Related technology In the cooling system of a vehicle, the head of the coolant can be increased by connecting two water pumps in series. However, when two water pumps are connected in series to drive the flow of coolant, the speed difference between the two water pumps may cause bubbles to form in the coolant, which in turn causes the water pump to run idle.

[0026] Based on this, in order to solve the problem of how to avoid 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 through the increased coolant, thereby effectively avoiding the water pump from idling. The method for preventing the water pump from idling described in the present application is as follows: The first aspect of the present application proposes an embodiment, such as Figure 1 A method for preventing a water pump from idling is shown in the step diagram, and the method is applied to a cooling system of a vehicle, and is specifically applied to a controller of the cooling system. The cooling system is used to cool a target component.

[0027] refer to Figure 2 A schematic diagram of a cooling system is shown, wherein the cooling system includes 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, and a controller is respectively connected to the first water pump and the second water pump for communication. The target component can be cooled by the coolant in the coolant pipe between the first water pump and the second water pump, or by the coolant in the coolant pipe upstream of the first water pump, or by the coolant in the coolant pipe downstream of the second water pump.

[0028] The first water pump and the second water pump are connected in series through a coolant pipeline, and there is coolant in the coolant pipeline. "The first water pump is located upstream of the second water pump" is specifically embodied in the structure that the outlet of the first water pump is connected to the inlet of the second water pump. This structure allows the coolant flowing out of the first water pump to flow into the second water pump again, so that the first water pump is located upstream of the second water pump. Among them, in the case where 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.

[0029] In an optional implementation, the target component may be a drive motor for a front axle, a drive motor for a rear axle, an on-board charger, an on-board DC power converter, a power distribution unit, and the like.

[0030] In an optional embodiment, reference Figure 2 The cooling system may further include 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 be referred to Figure 2 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 through a coolant pipeline.

[0031] The main steps of the method include: Step S101, obtaining the current air content of the coolant flowing through the second water pump.

[0032] The air content of coolant refers to the ratio between the volume of air and the volume of coolant in a unit volume of coolant pipe, or the ratio between the volume of air and unit volume. The higher the air content of coolant, the larger the space of coolant pipe occupied by air; the lower the air content of coolant, the smaller the space of coolant pipe occupied by air.

[0033] In an optional embodiment, the current air content of the coolant can be determined by the current rotation speed of the second water pump. Specifically, the target rotation speed of the second water pump corresponding to the target output power is first determined when the air content of the coolant of the second water pump is zero. Subsequently, during the actual operation of the second water pump, the actual rotation speed of the second water pump at the target output power is obtained, and the air content of the coolant is determined by the difference between the target rotation speed and the actual rotation speed. The larger the difference between the two, the higher the current air content of the coolant; the smaller the ratio between the two, the lower the current air content of the coolant.

[0034] Step S102 : when the current air content indicates that there is air in the coolant, obtaining target information based on which the speed regulation action is performed.

[0035] The target information includes a current rotation speed of the first water pump and / or a current temperature of the target component.

[0036] 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.

[0037] 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 condition where the kinetic energy generated by the rotation of the water pump is not fully used to drive the coolant flow.

[0038] When the current air content indicates that there is air in the coolant, it means that part of the kinetic energy generated by the rotation of the second water pump is used to drive the air flow in the coolant. In other words, when the current air content indicates that there is air in the coolant, it means that the second water pump is idling. Therefore, at this time, the target information should be acquired to start eliminating the air in the coolant.

[0039] In an optional embodiment, the current rotation speed of the first water pump can be obtained by a rotation 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.

[0040] In an optional implementation, 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 there is air in the coolant.

[0041] Step S103, based on the target information, adjusting the rotational speed of the first water pump and / or the second water pump so that the rotational speed difference between the first water pump and the second water pump after the adjustment is greater than the rotational speed difference between the first water pump and the second water pump before the adjustment.

[0042] The speed of the first water pump or the second water pump can be adjusted only, or the speed 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 only, the speed of the first water pump can be increased or the speed of the second water pump can be decreased.

[0043] When adjusting the rotational speeds of the first water pump and the second water pump at the same time, the rotational speed of the first water pump can be increased and the rotational speed of the second water pump can be decreased, or the rotational 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 rotational 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 less than the decrease amplitude of the second water pump.

[0044] 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 lowered; 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 lower the speed of the second water pump.

[0045] When the difference between the rotational speed adjusted by the first water pump and the rotational speed adjusted by 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.

[0046] In an optional implementation, when the speed of the first water pump is increased, the controller may send a speed increase signal to the first water pump, so that the first water pump increases the 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 reduction signal to the second water pump, so that the second water pump reduces the speed under the instruction of the speed reduction signal.

[0047] In the case where there is air in the coolant, this embodiment first acquires target information. The target information includes at least one of the current rotation speed of the first water pump and the current temperature of the target component. Subsequently, based on the target information, the rotation speeds of the first water pump and the second water pump are adjusted to increase the difference between the adjusted rotation speeds of the first water pump and the adjusted rotation speeds 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 through the increased coolant, thereby effectively preventing the water pumps from idling.

[0048] Optionally, 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 in step S103 specifically includes the following two situations: In case one, 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.

[0049] In case 2, when the current rotation speed is equal to the maximum rotation speed, the rotation speed of the second water pump is lowered.

[0050] 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 reached under the limitation of the first water pump's own structure, or the maximum speed that can be reached under the limitation set by the system.

[0051] 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, and thus 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, and thus the speed of the second water pump should be decreased.

[0052] In an optional implementation, 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 increasing the rotation speed of the first water pump, thereby increasing the air elimination rate.

[0053] 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 control action of the controller and ensuring that the air can be effectively eliminated.

[0054] Optionally, the target information includes the current temperature of the target component. The adjusting the rotation 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: In 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.

[0055] In case four, 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.

[0056] 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.

[0057] At the same time, the cooling capacity of the cooling system is related to the head of the coolant, and the head of the coolant is related to the rotation speed of the first water pump and the second water pump. The greater the rotation speed of the first water pump and the second water pump, the greater the head of the coolant, and the higher the cooling capacity of the cooling system; the smaller the rotation speed of the first water pump and the second water pump, the smaller the head of the coolant, and the lower the cooling capacity of the cooling system.

[0058] 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.

[0059] In an optional implementation, the preset temperature may be 90 degrees Celsius, or may be determined according to different optimal suitable operating temperature ranges of different target components.

[0060] Optionally, refer to Figure 3 A method step diagram for obtaining target information is shown, in which step S102, when the current air content indicates that there is air in the coolant, obtaining the target information based on which the speed adjustment action is performed specifically includes the following steps: Step S1021, when the current air content indicates that there is air in the coolant, determine whether the current air content is greater than a preset content.

[0061] 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 .

[0062] Step S1022, obtaining the target information.

[0063] Step S1023, after the timing of 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.

[0064] In the case where there is air in the coolant, the idling degree of the second water pump can be determined by judging whether the current air content is greater than the preset content. If the current air content is greater than the preset content, it indicates that the idling degree of the second water pump is relatively serious. At this time, the target information based on which the speed adjustment action is performed should be immediately obtained, and then steps S103 and S104 are further performed based on the target information to eliminate the air in the coolant.

[0065] If the current air content is less than or equal to the preset content, it indicates that the idling degree of the second water pump is slight, and the preset time can be counted first. After the preset time is over, the air content of the coolant flowing through the second water pump is obtained again, and the current air content is compared with the air content obtained again, so as to judge whether the idling condition of the second water pump is further aggravated through the relationship between the two.

[0066] When the air content acquired again is less than the current air content, it can be considered that the idling of the second water pump is on the decline, and thus the method described in this application can be terminated without adjusting the rotation speeds of the first water pump and the second water pump.

[0067] When the air content acquired 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 acquired, and then steps S103 and S104 are further executed based on the target information to eliminate the air in the coolant.

[0068] 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.

[0069] Optionally, refer to Figure 4 A method step diagram for obtaining air content is shown, wherein obtaining the current air content of the coolant flowing through the second water pump in step S101 specifically includes the following steps: Step S1011, obtaining the current conductivity of the coolant flowing through the second water pump.

[0070] Step S1012: determining the current air content based on the current conductivity.

[0071] 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.

[0072] In an optional embodiment, a conductivity sensor may be installed at the water inlet of the second water pump, and the current conductivity of the coolant flowing through the second water pump is measured by the conductivity sensor. The controller is connected to the conductivity sensor, and after receiving the current conductivity of the coolant transmitted by the conductivity sensor, it compares it with a preset coolant conductivity reference value in the airless state, so as to determine the current air content of the coolant.

[0073] In this embodiment, the current air content is determined by the current conductivity of the coolant, so that the air content can be accurately collected, thereby improving the accuracy of the cooling system's control over the rotation speeds of the first water pump and the second water pump.

[0074] Optionally, refer to Figure 5 Another method step diagram for obtaining air content is shown, in which the current air content is determined based on the current conductivity in step S1012, and further includes the following steps: Step S11, obtaining the current temperature of the coolant.

[0075] Step S12, determining a target mapping relationship corresponding to the current temperature of the coolant from a plurality of preset mapping relationships.

[0076] The preset mapping relationship includes the corresponding relationship between different electrical conductivities and different air contents.

[0077] Step S13: determining the air content corresponding to the current conductivity in the target mapping relationship as the current air content.

[0078] In addition to being affected by the air content, the conductivity of the coolant is also affected by the temperature of the coolant. 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 is necessary to first determine the target mapping relationship corresponding to the current coolant temperature based on the current coolant temperature, so as to determine the accurate air content.

[0079] In an optional implementation, 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.

[0080] Optionally, refer to Figure 6 A step diagram of a cooling system operating condition control method is shown, and 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: Step S105, obtaining the required flow rate of the coolant of the cooling system.

[0081] 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.

[0082] 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.

[0083] Step S107: When the first power consumption is greater than the second power consumption, control the cooling system to be in the second operating state.

[0084] 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.

[0085] 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.

[0086] 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 any one of the first water pump and the second water pump.

[0087] Taking the first water pump as an example, when estimating the first power consumption, we can first determine the output speed that the first water pump should have to meet the required flow rate based on the required flow rate, and then determine the energy conversion efficiency of the first water pump based on the output speed, and then determine the final first power consumption.

[0088] When estimating the second power consumption, the output speeds that the first water pump and the second water pump should have to meet the demanded flow rate can be determined first, and then the energy conversion efficiencies of the first water pump and the second water pump can be determined respectively based on the output speeds of the first water pump and the second water pump, 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.

[0089] After determining the first power consumption and the second power consumption, 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 operating state; if the first power consumption is greater than the second power consumption, the cooling system is controlled to be in the second operating state.

[0090] 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.

[0091] Based on the above embodiments, reference Figure 7 A flow chart of a method for preventing a water pump from idling is shown, and the method for preventing a water pump from idling described in the present application will be exemplarily described below: The method for preventing a water pump from idling described in the present application is applicable to a cooling system of a vehicle, and is specifically applied to a controller of the cooling system, wherein the cooling system is used to cool a target component. The cooling system includes 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, and the controller is respectively connected to the first water pump and the second water pump for communication. The method specifically includes the following steps: At the beginning of the method, the required flow rate of the coolant of the cooling system is first obtained, and a first power consumption of the cooling system corresponding to the required flow rate under a first working condition is estimated, and a second power consumption of the cooling system corresponding to the required flow rate under a second working condition is estimated. 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 at the same time.

[0092] When the first power consumption is less than or equal to the second power consumption, the cooling system is controlled to be in the first operating condition, and the method described in the present application is terminated.

[0093] When the first power consumption is greater than the second power consumption, the cooling system is controlled to be in the second operating state, and then the current conductivity of the coolant flowing through the second water pump and the current temperature of the coolant are obtained.

[0094] Then, a target mapping relationship corresponding to the current temperature of the coolant is determined from a plurality of preset mapping relationships, and the air content corresponding to the current conductivity in the target mapping relationship is determined as the current air content. The preset mapping relationship includes the correspondence between different conductivities and different air contents.

[0095] After obtaining the current air content of the coolant, it is determined whether the current air content indicates whether there is air in the coolant. If the current air content indicates that there is no air in the coolant, the method described in this application is terminated.

[0096] When the current air content indicates that there is air in the coolant, it is determined whether the current air content is greater than a preset content. When the current air content is greater than the preset content, target information is acquired. 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 acquired again after the preset time period ends.

[0097] When the air content acquired again is less than the current air content, the method described in the present application is terminated. When the air content acquired again is greater than or equal to the current air content, target information is acquired. 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.

[0098] Afterwards, based on the target information, the rotation speeds of the first water pump and the second water pump are adjusted. Specifically, taking the case where the target information includes the current rotation speed of the first water pump as an example, 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; when the current rotation speed is equal to the maximum rotation speed, the rotation speed of the second water pump is decreased. Alternatively, taking the case where the target information includes the current temperature of the target component as an example, when the current temperature of the target component is greater than the preset temperature, the rotation speed of the first water pump is increased, or the rotation speeds of the first water pump and the second water pump are increased at the same time and the increase in the rotation speed of the first water pump is greater than the increase in the rotation speed of the second water pump; when the current temperature of the target component is less than or equal to the preset temperature, the rotation speed of the second water pump is decreased, or the rotation speeds of the first water pump and the second water pump are decreased at the same time and the decrease in the rotation speed of the first water pump is less than the decrease in the rotation speed of the second water pump.

[0099] Based on the same inventive concept, the present application also provides a system for preventing a water pump from idling, the system for preventing a water pump from idling is applied to a cooling system of a vehicle, the cooling system is used to cool a target component, the cooling system comprises a first water pump and a second water pump connected in series in sequence, the first water pump is located upstream of the second water pump; like Figure 8 As shown in the structural schematic diagram of a system for preventing a water pump from idling, the system for preventing a water pump from idling comprises: A first acquisition module, used for acquiring 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 regulation 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, for adjusting the rotational speed of the first water pump and / or the second water pump based on the target information, so that the rotational speed difference between the first water pump and the second water pump after the adjustment is greater than the rotational speed difference between the first water pump and the second water pump before the adjustment.

[0100] Optionally, the target information includes a current speed of the first water pump, and the execution module is specifically used to increase the speed of the first water pump when the current speed is less than the maximum speed of the first water pump; and to reduce the speed of the second water pump when the current speed is equal to the maximum speed.

[0101] Optionally, the target information includes a current temperature of the target component, and the execution module is specifically 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 amplitude of the first water pump is greater than the speed increase amplitude of the second water pump; when the current temperature of the target component is less than or equal to the preset temperature, reduce the speed of the second water pump, or to reduce the speeds of the first water pump and the second water pump 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.

[0102] 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 a preset time period has expired 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.

[0103] Optionally, the first acquisition module is specifically used to acquire the current conductivity of the coolant flowing through the second water pump; and determine the current air content based on the current conductivity.

[0104] 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 a 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.

[0105] Optionally, the system further includes a working condition control module, which is used 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 at the same time; when the first power consumption is greater than the second power consumption, the cooling system is controlled to be in the second working condition; 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.

[0106] The embodiment of the present application also provides a computer-readable storage medium on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, a method for preventing a water pump from idling as disclosed in the embodiment of the present application is implemented.

[0107] An embodiment of the present application also provides a vehicle, including a system for preventing a water pump from idling provided by the present application, or including 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.

[0108] 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 that there is air in the coolant, obtaining target information based on which a speed regulation action is performed, the target information comprising a current speed of the first water pump and / or a current temperature of the target component; based on the target information, regulating the speed of the first water pump and / or the second water pump so that a speed difference between the first water pump and the second water pump after the regulation is greater than a speed difference between the first water pump and the second water pump before the regulation.

[0109] In the case where there is air in the coolant, the present application first acquires the target information. The target information includes at least one of the current rotation speed of the first water pump and the current temperature of the target component. Subsequently, based on the target information, the rotation speeds of the first water pump and the second water pump are adjusted to increase the difference between the adjusted rotation speed of the first water pump and the adjusted rotation 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 through the increased coolant, thereby effectively preventing the water pump from idling.

[0110] 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.

[0111] 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 generate 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.

[0112] These computer program instructions may also be stored in a computer readable memory capable of directing 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 A function specified in one or more boxes.

[0113] 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 The steps for the functions specified in one or more boxes.

[0114] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. 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 application.

[0115] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0116] The above is a detailed introduction to a method, system, storage medium and vehicle for preventing a water pump from idling provided by the present application. Specific examples are used herein 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 a person skilled in the art, according to the idea 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 is used to cool a target component, the cooling system comprises a first water pump and a second water pump connected in series, the first water pump is located upstream of the second water pump; the method comprises: obtaining a current air content of the coolant flowing through the second water pump; When the current air content indicates that there is air in the coolant, obtaining target information based on which the speed regulation action is performed, the target information including the current speed of the first water pump and / or the current temperature of the target component; Based on the target information, the rotational speed of the first water pump and / or the second water pump is adjusted so that the rotational speed difference between the first water pump and the second water pump after the adjustment is greater than the rotational speed difference between the first water pump and the second water pump before the adjustment.

2. The method for preventing a water pump from idling according to claim 1, characterized in that: 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 rotation speed is equal to the maximum rotation speed, the rotation speed of the second water pump is reduced.

3. The method for preventing a water pump from idling according to claim 1, characterized in that: The target information includes a current temperature of the target component, 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 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 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 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.

4. The method for preventing a water pump from idling according to claim 1, characterized in that: When the current air content indicates that there is air in the coolant, obtaining target information based on which the speed regulation action is performed includes: In a case where 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.

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

6. The method for preventing a water pump from idling according to claim 5, 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 relationship includes a correspondence relationship between different 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.

7. The method for preventing a water pump from idling according to claim 1, characterized in that: 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 of 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 the first water pump and the second water pump are turned on at the same time; 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.

8. 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, the cooling system is used to cool a target component, the cooling system comprises a first water pump and a second water pump connected in series, 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, used for acquiring 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 regulation 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, for adjusting the rotational speed of the first water pump and / or the second water pump based on the target information, so that the rotational speed difference between the first water pump and the second water pump after the adjustment is greater than the rotational speed difference between the first water pump and the second water pump before the adjustment.

9. 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 7 are implemented.

10. A vehicle, characterized in that: The invention comprises the system for preventing the water pump from idling as claimed in claim 8, 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 1-7.

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