An engine cooling control method, system, electronic device and storage medium

Abstract

The application provides an engine cooling control method, system, electronic equipment and storage medium, and relates to the technical field of engines.The engine cooling control method comprises the following steps: acquiring multiple engine working conditions, multiple actual engine coolant temperatures corresponding to the multiple engine working conditions respectively, and multiple target engine coolant temperatures; determining a relationship map (MAP) of a large circulating ball valve opening degree, a small circulating ball valve opening degree and an engine working condition according to the multiple engine working conditions and the multiple target engine coolant temperatures; and determining the large circulating ball valve opening degree and the small circulating ball valve opening degree according to a difference between the actual coolant temperature and the target coolant temperature and the relationship map of the large circulating ball valve opening degree, the small circulating ball valve opening degree and the engine working condition. The coolant temperature can be more accurately controlled to reach the target temperature, oil consumption is reduced, the time for test calibration is saved, and product development cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, and specifically relates to an engine cooling control method and system, an electronic device and a storage medium. BACKGROUND

[0002] A large amount of heat is released by combustion in the cylinder of an engine, and the flow and temperature of the coolant play a role in cooling the engine. The control of the electric control ball valve thermostat lacks a system calculation module to provide the opening MAP of the electric control ball valve thermostat, so that the coolant temperature control is inaccurate, and the calibration time is relatively long.

[0003] At present, the control strategy of the electric control ball valve thermostat is calibrated through experiments, which consumes a large amount of time and cost, and the control of the coolant temperature is inaccurate, and it is difficult to perform systematic analysis, and lacks an opening calculation module of the electric control ball valve thermostat. SUMMARY

[0004] The present application provides an engine cooling control method, system, electronic device and storage medium to at least solve one technical problem in the related art.

[0005] According to one aspect of an embodiment of the present application, an engine cooling control method is provided, the engine comprising an electric control ball valve thermostat, the electric control ball valve thermostat comprising an inlet connected to a cooling water jacket and an oil cooler respectively, and further comprising a large circulation ball valve outlet connected to a water pump through a radiator and a small circulation ball valve outlet directly connected to the water pump; the engine cooling control method comprising:

[0006] obtaining a plurality of engine operating conditions, a plurality of actual coolant temperatures of the engine corresponding to the plurality of engine operating conditions respectively, and a plurality of target coolant temperatures of the engine;

[0007] determining a relationship MAP of a large circulation ball valve opening, a small circulation ball valve opening and an engine operating condition according to the plurality of engine operating conditions and the plurality of target coolant temperatures of the engine;

[0008] determining the large circulation ball valve opening and the small circulation ball valve opening according to a difference between the actual coolant temperature and the target coolant temperature and the relationship MAP of the large circulation ball valve opening, the small circulation ball valve opening and the engine operating condition.

[0009] As an optional implementation, the determining the relationship map of the large circulating ball valve opening degree and the small circulating ball valve opening degree with the engine operating condition according to the engine operating condition and the engine target coolant temperature comprises: determining a target flow of the large circulating ball valve outlet and a target flow of the small circulating ball valve outlet; determining a target pressure drop of the large circulating ball valve outlet and a target pressure drop of the small circulating ball valve outlet; and determining the relationship map of the large circulating ball valve opening degree and the small circulating ball valve opening degree with the engine operating condition according to the target flow of the large circulating ball valve outlet, the target flow of the small circulating ball valve outlet, the target pressure drop of the large circulating ball valve outlet and the target pressure drop of the small circulating ball valve outlet.

[0010] As an optional implementation, the method further comprises: determining a water pump target flow, a radiator target flow, a target flow of the large circulating ball valve outlet and a target flow of the small circulating ball valve outlet according to the target coolant temperature; determining a flow pressure drop curve of the cooling water jacket, a flow pressure drop curve of the oil cooler and a flow pressure drop curve of the radiator; and determining the target pressure drop of the large circulating ball valve outlet and the target pressure drop of the small circulating ball valve outlet according to the flow pressure drop curve of the cooling water jacket, the flow pressure drop curve of the oil cooler and the flow pressure drop curve of the radiator.

[0011] As an optional implementation, the determining the target pressure drop of the large circulating ball valve outlet and the target pressure drop of the small circulating ball valve outlet according to the flow pressure drop curve of the cooling water jacket, the flow pressure drop curve of the oil cooler and the flow pressure drop curve of the radiator comprises: determining a cooling water jacket pressure drop according to the flow pressure drop curve of the cooling water jacket; obtaining a radiator target coolant pressure drop according to the flow pressure drop curve of the radiator and the radiator target flow; determining a target pressure rise of the water pump; and determining a target coolant pressure drop of the large circulating ball valve outlet according to the target pressure rise of the water pump, the cooling water jacket pressure drop and the radiator target coolant pressure drop.

[0012] As an optional implementation, the determining the target pressure rise of the water pump comprises: determining a water pump rotating speed according to a rotating speed of the engine and a pulley speed ratio of the water pump; determining a target lift of the water pump according to the water pump rotating speed and the target flow; and determining the target pressure rise of the water pump according to the target lift of the water pump.

[0013] As an optional implementation, the determining the target pressure drop of the large circulating ball valve outlet and the target pressure drop of the small circulating ball valve outlet according to the flow pressure drop curve of the cooling water jacket, the flow pressure drop curve of the oil cooler and the flow pressure drop curve of the radiator comprises: determining a target coolant pressure drop of the small circulating ball valve outlet according to the target pressure rise of the water pump and the target pressure drop of the cooling water jacket.

[0014] As an optional implementation, the method for determining the relationship between the large circulating globe valve opening degree, the small circulating globe valve opening degree and the engine operating condition MAP according to the target flow of the large circulating globe valve outlet, the target flow of the small circulating globe valve outlet, the target pressure drop of the large circulating globe valve outlet and the target pressure drop of the small circulating globe valve outlet comprises: obtaining the actual pressure drop of the large circulating globe valve outlet and the actual pressure drop of the small circulating globe valve outlet; determining the target resistance characteristic coefficient and the actual resistance characteristic coefficient of the large circulating globe valve outlet according to the target pressure drop and the actual pressure drop of the large circulating globe valve outlet and the target flow and the actual flow of the large circulating globe valve outlet; adjusting the opening degree of the large circulating globe valve until the actual resistance characteristic coefficient is equal to the target resistance characteristic coefficient to obtain the opening degree of the large circulating globe valve under the current engine operating condition; determining the target resistance characteristic coefficient and the actual resistance characteristic coefficient of the small circulating globe valve outlet according to the target pressure drop and the actual pressure drop of the small circulating globe valve outlet and the target flow and the actual flow of the small circulating globe valve outlet; adjusting the opening degree of the small circulating globe valve until the actual resistance characteristic coefficient is equal to the target resistance characteristic coefficient to obtain the opening degree of the small circulating globe valve under the current engine operating condition.

[0015] According to another aspect of the embodiments of the present application, an engine cooling control system is provided, the engine comprising an electrically controlled globe valve thermostat, the electrically controlled globe valve thermostat comprising an inlet connected to a cooling water jacket and an oil cooler respectively, a large circulating globe valve outlet connected to a water pump through a radiator and a small circulating globe valve outlet directly connected to the water pump; the engine cooling control system comprising: an obtaining module for obtaining a plurality of engine operating conditions, a plurality of engine actual coolant temperatures corresponding to the plurality of engine operating conditions respectively and a plurality of engine target coolant temperatures; a determining module for determining a relationship between the large circulating globe valve opening degree, the small circulating globe valve opening degree and the engine operating condition MAP according to the plurality of engine operating conditions and the plurality of engine target coolant temperatures; an enabling module for determining the large circulating globe valve opening degree and the small circulating globe valve opening degree according to the difference between the actual coolant temperature and the target coolant temperature and the relationship between the large circulating globe valve opening degree, the small circulating globe valve opening degree and the engine operating condition MAP.

[0016] According to still another aspect of the embodiments of the present application, an electronic device is provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus, the memory is configured to store a computer program, and the processor is configured to execute the engine cooling control method steps by running the computer program stored on the memory.

[0017] According to still another aspect of the embodiments of the present application, a computer readable storage medium is provided, and the storage medium stores a computer program. The computer program is configured to execute the engine cooling control method when running.

[0018] In the embodiments of the present application, an engine cooling control method is provided. The engine includes an electronically controlled ball valve thermostat, which includes an inlet connected to a cooling water jacket and an oil cooler respectively, a large circulation ball valve outlet connected to a water pump through a radiator, and a small circulation ball valve outlet directly connected to the water pump. The engine cooling control method includes: obtaining a plurality of engine operating conditions, a plurality of actual engine coolant temperatures corresponding to the plurality of engine operating conditions respectively, and a plurality of engine target coolant temperatures; determining a relationship map (MAP) of a large circulation ball valve opening degree, a small circulation ball valve opening degree, and an engine operating condition according to the plurality of engine operating conditions and the plurality of engine target coolant temperatures; and determining the large circulation ball valve opening degree and the small circulation ball valve opening degree according to a difference between the actual coolant temperature and the target coolant temperature and the relationship MAP of the large circulation ball valve opening degree, the small circulation ball valve opening degree, and the engine operating condition. A method for determining the large and small circulation opening degrees of the electronically controlled ball valve of the cooling system according to the engine target coolant temperature is established, and the MAP of the large and small circulation opening degrees of the electronically controlled ball valve is determined, which is beneficial to more accurately control the coolant temperature to reach the target temperature. The coolant temperature control is more accurate, and the oil consumption is reduced. The MAP of the large and small circulation opening degrees of the electronically controlled ball valve is determined by the method, the time for test and calibration is saved, and the product development cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0021] Figure 1 is a flowchart of an optional engine cooling control method according to the embodiments of the present application;

[0022] Figure 2 is a structural block diagram of an optional electronic device according to the embodiments of the present application. DETAILED DESCRIPTION

[0023] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] In order to realize the detection and control of the real-time working state of the engine, the rotational speed sensor is mostly used to monitor the rotational speed of the supercharger. However, there is no standard device in the prior art for calibrating the rotational speed sensor of the supercharger of the diesel engine, so that the reliability of the detection data of the rotational speed of the supercharger of the engine cannot be guaranteed on the basis that the rotational speed sensor of the supercharger cannot be calibrated.

[0026] As shown in Figure 1 The present application provides an engine cooling control method, the engine comprising an electronically controlled ball valve thermostat, the electronically controlled ball valve thermostat comprising an inlet connected with a cooling water jacket and an oil cooler respectively, and further comprising a large circulation ball valve outlet connected with a water pump through a radiator and a small circulation ball valve outlet directly connected with the water pump; the engine cooling control method comprising:

[0027] S1 obtaining a plurality of engine working conditions, a plurality of actual cooling liquid temperatures corresponding to the plurality of engine working conditions respectively, and a plurality of engine target cooling liquid temperatures;

[0028] S2 determining a relationship MAP between a large circulation ball valve opening degree, a small circulation ball valve opening degree and an engine working condition according to the plurality of engine working conditions and the plurality of engine target cooling liquid temperatures;

[0029] S3 determines the opening degree of the large circulation ball valve and the opening degree of the small circulation ball valve based on the difference between the actual coolant temperature and the target coolant temperature, as well as the relationship between the opening degree of the large circulation ball valve, the opening degree of the small circulation ball valve and the engine operating conditions (MAP).

[0030] A method was established to determine the large and small circulation openings of the electronically controlled ball valve in the cooling system based on the target engine coolant temperature. Determining the MAP (Maximum Aspect Ratio) of the large and small circulation openings of the electronically controlled ball valve facilitates more accurate control of the coolant temperature to reach the target temperature. This more accurate coolant temperature control contributes to reduced fuel consumption. Furthermore, determining the MAP of the large and small circulation openings of the electronically controlled ball valve using this method saves time on testing and calibration, reducing product development costs.

[0031] The target engine coolant temperature can be obtained according to the following specific embodiments:

[0032] Under thermal equilibrium conditions, the parameters that can be directly obtained include the engine outlet water temperature and the radiator fan speed. The engine outlet water temperature is the actual coolant temperature.

[0033] First, the heat carried away by the coolant is related to engine speed, load rate, target coolant flow rate of the water pump, engine inlet water temperature, and outlet water temperature:

[0034]

[0035] Where: H C Let Q be the heat carried away by the coolant, n be the engine speed, ε be the engine load rate, and Q be the engine load factor. p T represents the target coolant flow rate of the water pump. C-out T is the engine's outlet water temperature. c-in This represents the engine's inlet water temperature. The coefficients C1, k1, k2, k3, and k4 can be determined using experimental data.

[0036] The engine inlet water temperature is related to the heat carried away by the coolant, the target coolant flow rate of the water pump, and the engine outlet water temperature.

[0037]

[0038] In the formula C c1 This refers to the average specific heat capacity of the engine coolant.

[0039] Under thermal equilibrium, the heat carried away by the coolant equals the heat dissipated by the radiator:

[0040] H C =H r (1.3)

[0041] The heat dissipation of the radiator is related to the target coolant flow of the water pump, the air speed flowing through the radiator, and the liquid-gas temperature difference, which is the difference between the engine outlet water temperature and the atmospheric temperature:

[0042] H r = C2·Q p δ1 ·v r δ2 ·(T C-out -T a ) δ3 (1.4)

[0043] In the formula, H r is the heat dissipation of the radiator, v r is the air speed flowing through the radiator, T a is the atmospheric temperature, and the coefficients c2, δ1, δ2, and δ3 are determined through test data.

[0044] The outlet water temperature of the radiator is related to the heat dissipation of the radiator, the target flow of the radiator, and the engine outlet water temperature:

[0045]

[0046] In the formula, T r-out is the outlet water temperature of the radiator, C C2 is the average specific heat capacity of the radiator coolant, and Q r is the target flow of the radiator.

[0047] The sum of the target flow of the radiator and the coolant flow of the small cycle is equal to the target coolant flow of the water pump:

[0048] Q r +Q d =Q p (1.6)

[0049] In the formula, Q d is the target flow of the ball valve small cycle.

[0050] The product of the engine outlet water temperature and the coolant flow and specific heat capacity of the small cycle, the product of the outlet water temperature of the radiator and the target flow and specific heat capacity of the radiator, and the product of the engine inlet water temperature and the target coolant flow and specific heat capacity of the water pump are equal to the sum of the first and second products:

[0051] C C3 ·Q d ·T C-out +C C4 ·Q r ·T r-out = C C5 ·Q p ·T c-in(1.7)

[0052] In the formula C C3 C is the specific heat capacity of the small-circulation coolant. C4 C represents the specific heat capacity of the water outlet from the radiator. C5 This refers to the specific heat capacity of water entering the engine.

[0053] Therefore, at a certain engine speed, load, and target coolant temperature, the target coolant flow rate of the water pump, the target flow rate of the radiator, and the target flow rate of the ball valve small circulation can be obtained.

[0054] As an optional implementation, determining the relationship MAP between the large circulation ball valve opening, the small circulation ball valve opening, and the engine operating conditions based on the engine operating conditions and the target engine coolant temperature includes: determining the target flow rate at the outlet of the large circulation ball valve and the target flow rate at the outlet of the small circulation ball valve; determining the target pressure drop at the outlet of the large circulation ball valve and the target pressure drop at the outlet of the small circulation ball valve; and determining the relationship MAP between the large circulation ball valve opening, the small circulation ball valve opening, and the engine operating conditions based on the target flow rate at the outlet of the large circulation ball valve, the target flow rate at the outlet of the small circulation ball valve, the target pressure drop at the outlet of the large circulation ball valve, and the target pressure drop at the outlet of the small circulation ball valve.

[0055] Specifically, the flow rate and pressure drop curves of the cooling water jacket, the oil cooler, and the radiator can be obtained through experimental testing or CFD simulation; according to the cooling water flow rate and pressure drop relationship formula ΔP=kρQ 2 / (2A 2 In the formula, ΔP is the pressure drop of the coolant, k is the drag coefficient, ρ is the density of the coolant, Q is the volumetric flow rate of the coolant, and A is the cross-sectional area. kρ / (2A) 2 ΔP is defined as the drag characteristic coefficient, denoted as C, therefore ΔP = CQ 2 Based on the flow rate and pressure drop curve of the cooling water jacket, the resistance characteristic coefficient C of the cooling water jacket can be calculated. WJ Based on the flow rate and pressure drop curve of the oil cooler, the resistance characteristic coefficient C of the oil cooler can be calculated. OC Because the oil cooler is connected in parallel with the cooling water jacket, the cooling pressure drop of the oil cooler is ΔP. OC Equal to the pressure drop ΔP of the cooling water jacket WJ That is, ΔP OC =ΔP WJ And ΔP OC =C OC Q OC 2 ΔP WJ =C WJ Q WJ 2 Therefore, C OC QOC 2 =C WJ Q WJ 2 Q OC +Q WJ =Q P Target coolant flow rate Q of water pump P The flow rate Q of the cooling water jacket can be calculated using the seven relationships derived in step 1. WJ and the coolant flow rate Q of the oil cooler OC The pressure drop of the cooling water jacket is obtained from the flow rate and pressure drop curve of the cooling water jacket; the target cooling pressure drop of the radiator is obtained from the coolant flow rate and pressure drop curve of the radiator and the target coolant flow rate of the radiator, where the target coolant flow rate of the radiator has been calculated.

[0056] Based on the engine speed and the known pulley speed ratio of the mechanical water pump, the water pump speed is obtained. Using the water pump speed and target coolant flow rate, and through tests of water pump components to measure the speed, flow rate, and head data, the target water pump head is determined. Based on the target water pump head H, the target pressure rise ΔP is calculated. cp , where ΔP cp =ρgH, where ρ is the density of the coolant, and the target pressure rise ΔP of the water pump is... cp Equal to the pressure drop ΔP of the cooling water jacket WJ Adding the target cooling hydraulic pressure drop ΔP in the large circulation of the ball valve BVR The target cooling hydraulic pressure drop ΔP of the radiator R That is, ΔP cp =ΔP WJ +ΔP BVR +ΔP R Therefore, the target coolant pressure drop in the ball valve's main circulation can be calculated. The target coolant flow rate in the ball valve's main circulation is equal to the target coolant flow rate in the radiator, where the target coolant flow rate has already been determined. Thus, the target coolant flow rate and pressure drop data for the ball valve's main circulation are obtained. By collecting the inlet coolant pressure and outlet coolant pressure and flow rate of the ball valve's main circulation, the actual coolant flow rate and pressure drop data for the ball valve's main circulation are obtained. According to the formula ΔP = CQ, the coolant pressure drop and flow rate relationship is calculated. 2 By comparing the target coolant flow rate and pressure drop data with the actual coolant flow rate and pressure drop data of the ball valve's large circulation loop, the target resistance characteristic coefficient and the actual resistance characteristic coefficient of the ball valve's large circulation loop are calculated. The opening of the ball valve's large circulation loop is then adjusted until the actual resistance characteristic coefficient equals the target resistance characteristic coefficient. Thus, the opening of the ball valve's large circulation loop at a certain engine speed and load is obtained. This can be further extended to obtain the MAP of the ball valve's large circulation loop opening at various engine speeds and loads.

[0057] The target pressure rise ΔP of the water pump cpAt the same time equal to the target pressure drop ΔP of the cooling water jacket WJ Plus the target cooling liquid pressure drop ΔP of the ball valve small circulation BVD , ΔP cp = ΔP WJ + ΔP BVD , so the target cooling liquid pressure drop of the ball valve small circulation can be obtained, and thus the target cooling liquid flow data and the pressure drop data of the ball valve small circulation are obtained. By collecting the inlet cooling liquid pressure of the ball valve and the outlet cooling liquid pressure and flow of the ball valve small circulation, the actual cooling liquid flow data and the pressure drop data of the ball valve small circulation are obtained. According to the cooling liquid pressure drop flow relationship formula ΔP = CQ 2 , the target cooling liquid flow data and the pressure drop data of the ball valve small circulation and the actual cooling liquid flow data and the pressure drop data are obtained, the target resistance characteristic coefficient and the actual resistance characteristic coefficient of the ball valve small circulation are obtained, the opening of the ball valve small circulation is adjusted until the actual resistance characteristic coefficient of the ball valve small circulation is equal to the target resistance characteristic coefficient, and thus the opening of the ball valve small circulation under a certain speed and load of the engine is obtained, and the opening MAP of the ball valve small circulation under each speed and load of the engine is further expanded.

[0058] As an optional implementation, it further comprises: determining the target flow of the water pump, the target flow of the radiator, the target flow of the large circulation ball valve outlet and the target flow of the small circulation ball valve outlet according to the target cooling liquid temperature; determining the flow pressure drop curve of the cooling water jacket, the flow pressure drop curve of the oil cooler and the flow pressure drop curve of the radiator; determining the target pressure drop of the large circulation ball valve outlet and the target pressure drop of the small circulation ball valve outlet according to the flow pressure drop curve of the cooling water jacket, the flow pressure drop curve of the oil cooler and the flow pressure drop curve of the radiator.

[0059] As an optional implementation, the determination of the target pressure drop of the large circulation ball valve outlet and the target pressure drop of the small circulation ball valve outlet according to the flow pressure drop curve of the cooling water jacket, the flow pressure drop curve of the oil cooler and the flow pressure drop curve of the radiator comprises: determining the cooling water jacket pressure drop according to the flow pressure drop curve of the cooling water jacket; obtaining the target cooling liquid pressure drop of the radiator according to the flow pressure drop curve of the radiator and the target flow of the radiator; determining the target pressure rise of the water pump; determining the target cooling liquid pressure drop of the large circulation ball valve outlet according to the target pressure rise of the water pump, the cooling water jacket pressure drop and the target cooling liquid pressure drop of the radiator.

[0060] As an optional implementation, the determination of the target pressure rise of the water pump comprises: determining the water pump speed according to the speed of the engine and the pulley speed ratio of the water pump; determining the target lift of the water pump according to the water pump speed and the target flow; determining the target pressure rise of the water pump according to the target lift of the water pump.

[0061] As an optional implementation, the determining the target pressure drop of the large circulation ball valve outlet and the target pressure drop of the small circulation ball valve outlet according to the flow pressure drop curve of the cooling jacket, the flow pressure drop curve of the oil cooler and the flow pressure drop curve of the radiator comprises: determining the target coolant pressure drop of the small circulation ball valve outlet according to the target pressure rise of the water pump and the target pressure drop of the cooling jacket.

[0062] As an optional implementation, the determining the relationship MAP of the large circulation ball valve opening, the small circulation ball valve opening and the engine operating condition according to the target flow of the large circulation ball valve outlet, the target flow of the small circulation ball valve outlet, the target pressure drop of the large circulation ball valve outlet and the target pressure drop of the small circulation ball valve outlet comprises: obtaining the actual pressure drop of the outlet of the large circulation ball valve and the actual pressure drop of the outlet of the small circulation ball valve; determining the target resistance characteristic coefficient and the actual resistance characteristic coefficient of the outlet of the large circulation ball valve according to the target pressure drop and the actual pressure drop of the outlet of the large circulation ball valve, the target flow and the actual flow of the outlet of the large circulation ball valve; adjusting the opening of the large circulation ball valve until the actual resistance characteristic coefficient is equal to the target resistance characteristic coefficient, obtaining the opening of the large circulation ball valve under the current engine operating condition; determining the target resistance characteristic coefficient and the actual resistance characteristic coefficient of the outlet of the small circulation ball valve according to the target pressure drop and the actual pressure drop of the outlet of the small circulation ball valve, the target flow and the actual flow of the outlet of the small circulation ball valve; adjusting the opening of the small circulation ball valve until the actual resistance characteristic coefficient is equal to the target resistance characteristic coefficient, obtaining the opening of the small circulation ball valve under the current engine operating condition.

[0063] According to another aspect of the embodiments of the present application, an engine cooling control system is provided, the engine comprising an electronically controlled ball valve thermostat, the electronically controlled ball valve thermostat comprising an inlet connected to a cooling jacket and an oil cooler respectively, and a large circulation ball valve outlet connected to a water pump through a radiator and a small circulation ball valve outlet directly connected to the water pump; the engine cooling control system comprising: an obtaining module for obtaining a plurality of engine operating conditions, a plurality of engine actual coolant temperatures corresponding to the plurality of engine operating conditions respectively and a plurality of engine target coolant temperatures; a determining module for determining a relationship MAP of the large circulation ball valve opening, the small circulation ball valve opening and the engine operating condition according to the plurality of engine operating conditions and the plurality of engine target coolant temperatures; an enabling module for determining the large circulation ball valve opening and the small circulation ball valve opening according to the difference between the actual coolant temperature and the target coolant temperature and the relationship MAP of the large circulation ball valve opening, the small circulation ball valve opening and the engine operating condition.

[0064] Figure 2 is a structural block diagram of an optional electronic device according to the embodiments of the present application, as Figure 2As shown, the electronic device includes a processor 202, a communication interface 204, a memory 206 and a communication bus 208, wherein the processor 202, the communication interface 204 and the memory 206 communicate with each other through the communication bus 208, and

[0065] The memory 206 is configured to store a computer program.

[0066] The processor 202 is configured to execute the computer program stored in the memory 206 to implement the steps of the engine cooling control method.

[0067] According to another aspect of the embodiments of the present application, an electronic device for implementing the engine cooling control method is also provided. The electronic device can be a server, a terminal or a combination thereof.

[0068] The communication interface is configured to communicate between the electronic device and other devices.

[0069] The memory can include a RAM and a non-volatile memory, for example, at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor.

[0070] Other module units in the engine cooling control system can also be included, but are not limited to the above, and will not be described herein.

[0071] According to another aspect of the embodiments of the present application, a storage medium is also provided. Optionally, in the present embodiment, the storage medium can be used to store program codes for implementing the engine cooling control method.

[0072] Optionally, in the present embodiment, the storage medium can be located on at least one of the network devices in the network shown in the aforementioned embodiments.

[0073] Optionally, in the present embodiment, the storage medium is configured to store program codes for implementing the steps of the engine cooling control method.

[0074] The specific examples in the present embodiment can refer to the examples described in the aforementioned embodiments, and will not be described herein.

[0075] Optionally, in the present embodiment, the storage medium can include, but is not limited to, a U disk, a ROM, a RAM, a mobile hard disk, a magnetic disk or an optical disk and various media that can store program codes.

[0076] The serial numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0077] The integrated units in the above embodiments, if implemented in the form of software function units and sold or used as independent products, can be stored in the above computer-readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing one or more electronic devices (which can be personal computers, servers or network devices, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0078] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0079] In the several embodiments provided by the present application, it should be understood that the disclosed client can be implemented in other ways. Of course, the above device embodiment is only illustrative, and the division of the units is only a logical function division. In actual implementation, another division mode can be adopted, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection through some interfaces, units or modules, and can be electrical or other forms.

[0080] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., they can be located in one place or distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the scheme provided in the embodiments.

[0081] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0082] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0083] The above description is only the preferred embodiments of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be regarded as the protection scope of the present application.

Claims

1. An engine cooling control method characterized by, The engine comprises an electronically controlled ball valve thermostat, which comprises an inlet connected with a cooling water jacket and an oil cooler respectively, and a large circulation ball valve outlet connected with a water pump through a radiator and a small circulation ball valve outlet directly connected with the water pump; The engine cooling control method comprises: obtaining a plurality of engine operating conditions, a plurality of actual engine coolant temperatures corresponding to the plurality of engine operating conditions respectively, and a plurality of engine target coolant temperatures; determining a relationship map of the large circulation ball valve opening degree, the small circulation ball valve opening degree and the engine operating condition according to the plurality of engine operating conditions and the plurality of engine target coolant temperatures, including determining a target flow of the large circulation ball valve outlet and a target flow of the small circulation ball valve outlet, determining a target pressure drop of the large circulation ball valve outlet and a target pressure drop of the small circulation ball valve outlet, and determining the relationship map of the large circulation ball valve opening degree, the small circulation ball valve opening degree and the engine operating condition according to the target flow of the large circulation ball valve outlet, the target flow of the small circulation ball valve outlet, the target pressure drop of the large circulation ball valve outlet and the target pressure drop of the small circulation ball valve outlet; determining the large circulation ball valve opening degree and the small circulation ball valve opening degree according to the difference between the actual coolant temperature and the target coolant temperature and the relationship map of the large circulation ball valve opening degree, the small circulation ball valve opening degree and the engine operating condition; The method further comprises: determining a water pump target flow, a radiator target flow, a target flow of the large circulation ball valve outlet and a target flow of the small circulation ball valve outlet according to the target coolant temperature; determining a flow pressure drop curve of the cooling water jacket, a flow pressure drop curve of the oil cooler and a flow pressure drop curve of the radiator; determining the target pressure drop of the large circulation ball valve outlet and the target pressure drop of the small circulation ball valve outlet according to the flow pressure drop curve of the cooling water jacket, the flow pressure drop curve of the oil cooler and the flow pressure drop curve of the radiator, including determining a cooling water jacket pressure drop according to the flow pressure drop curve of the cooling water jacket; obtaining a radiator target coolant pressure drop according to the flow pressure drop curve of the radiator and the radiator target flow; determining a target pressure rise of the water pump; determining a target coolant pressure drop of the large circulation ball valve outlet according to the target pressure rise of the water pump, the cooling water jacket pressure drop and the radiator target coolant pressure drop, and determining a target coolant pressure drop of the small circulation ball valve outlet according to the target pressure rise of the water pump and the target pressure drop of the cooling water jacket; The determination of the target pressure rise of the water pump comprises: determining a water pump rotating speed according to an engine rotating speed and a pulley speed ratio of the water pump; determining a target lift of the water pump according to the water pump rotating speed and the target flow; determining the target pressure rise of the water pump according to the target lift of the water pump.

2. The engine cooling control method according to claim 1, characterized by, The determination of the relationship map of the large circulation ball valve opening degree, the small circulation ball valve opening degree and the engine operating condition according to the target flow of the large circulation ball valve outlet, the target flow of the small circulation ball valve outlet, the target pressure drop of the large circulation ball valve outlet and the target pressure drop of the small circulation ball valve outlet comprises: obtaining an actual pressure drop of the outlet of the large circulation ball valve and an actual pressure drop of the outlet of the small circulation ball valve; According to the target pressure drop and the actual pressure drop of the large circulating ball valve outlet, the target flow and the actual flow of the large circulating ball valve outlet, the target resistance characteristic coefficient and the actual resistance characteristic coefficient of the large circulating ball valve outlet are determined; The opening of the large circulating ball valve is adjusted until the actual resistance characteristic coefficient is equal to the target resistance characteristic coefficient, and the opening of the large circulating ball valve under the current engine working condition is obtained; According to the target pressure drop and the actual pressure drop of the small circulating ball valve outlet, the target flow and the actual flow of the small circulating ball valve outlet, the target resistance characteristic coefficient and the actual resistance characteristic coefficient of the small circulating ball valve outlet are determined; The opening of the small circulating ball valve is adjusted until the actual resistance characteristic coefficient is equal to the target resistance characteristic coefficient, and the opening of the small circulating ball valve under the current engine working condition is obtained.

3. An engine cooling control system for performing the method of claim 1 or 2, characterized by The engine includes an electronically controlled ball valve thermostat, which includes an inlet connected with a cooling water jacket and an oil cooler respectively, and a large circulating ball valve outlet connected with a water pump through a radiator and a small circulating ball valve outlet directly connected with the water pump; The engine cooling control system comprises: An acquisition module is configured to acquire a plurality of engine working conditions, a plurality of actual engine coolant temperatures corresponding to the plurality of engine working conditions respectively, and a plurality of target engine coolant temperatures; A determination module is configured to determine a relationship map (MAP) of large circulating ball valve opening, small circulating ball valve opening and engine working condition according to the plurality of engine working conditions and the plurality of target engine coolant temperatures; An enabling module is configured to determine the large circulating ball valve opening and the small circulating ball valve opening according to a difference between the actual coolant temperature and the target coolant temperature and the relationship map (MAP) of large circulating ball valve opening, small circulating ball valve opening and engine working condition.

4. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein, The processor, the communication interface and the memory complete communication with each other through the communication bus, characterized in that, The memory is configured to store a computer program; The processor is configured to execute the engine cooling control method steps of claim 1 or 2 by running the computer program stored on the memory.

5. A computer readable storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the engine cooling control method steps of claim 1 or 2 when running.

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