Vehicle engine cooling system matching method and device and storage medium

Abstract

The invention provides a vehicle engine cooling system matching method and device and a storage medium. The vehicle engine cooling system matching method comprises the steps that a one-dimensional whole vehicle power model and a one-dimensional engine cooling system model of a vehicle are established; establishing an engine compartment three-dimensional simulation model of the vehicle, and performing heat flow field simulation based on the engine compartment three-dimensional simulation model to obtain an engine compartment heat flow field model; determining thermal load parameters according to the actual working condition of the whole vehicle, inputting the thermal load parameters into the engine compartment heat flow field model, and outputting heat flow field parameters; inputting the heat flow field parameters into a one-dimensional engine cooling system model for coupling simulation, and outputting simulation key performance parameters of the one-dimensional engine cooling system model; the simulation key performance parameters of the one-dimensional engine cooling system module and the target key performance parameters of the one-dimensional engine cooling system module are compared, matching design of the vehicle engine cooling system is carried out, and the difference degree of the simulation key performance parameters and the target key performance parameters is within a preset range.

Description

Technical Field

[0001] The present invention relates to the field of vehicle thermal management technology, and in particular to a vehicle engine cooling system matching method, device and storage medium. Background Art

[0002] With the rapid development of the automobile industry, the load of commercial vehicles is getting bigger and bigger, and the engine power of commercial vehicles is also getting higher and higher. In order to avoid overheating of high-power engines during operation, their cooling systems generally use large-sized radiators, water pumps and fans, which increases the design margin of the engine cooling system and the manufacturing cost of commercial vehicles. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a vehicle engine cooling system matching method, device and storage medium.

[0004] The present invention provides a vehicle engine cooling system matching method, comprising: establishing a one-dimensional vehicle power model and a one-dimensional engine cooling system model of the vehicle; establishing a three-dimensional simulation model of the engine compartment of the vehicle, performing thermal flow field simulation based on the three-dimensional simulation model of the engine compartment, and obtaining a thermal flow field model of the engine compartment; determining a thermal load parameter according to an actual working condition of the whole vehicle, inputting the thermal load parameter into the thermal flow field model of the engine compartment, and outputting a thermal flow field parameter; inputting the thermal flow field parameter into the one-dimensional engine cooling system model for coupled simulation, and outputting simulation key performance parameters of the one-dimensional engine cooling system model; comparing the simulation key performance parameters of the one-dimensional engine cooling system module with the target key performance parameters of the one-dimensional engine cooling system module, and performing matching design of the vehicle engine cooling system, so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

[0005] According to a vehicle engine cooling system matching method provided by the present invention, the one-dimensional engine cooling system model includes a heat exchanger; before the thermal flow field parameters are input into the one-dimensional engine cooling system model for coupling simulation, the method further includes: fitting according to the heat transfer performance calculation method of the heat exchanger to obtain a high and low temperature fluid heat dissipation correlation formula and input it into the one-dimensional engine cooling system model; inputting the thermal flow field parameters into the one-dimensional engine cooling system model for coupling simulation, specifically including: inputting the thermal flow field parameters into the one-dimensional engine cooling system model so that the one-dimensional engine cooling system model performs coupling simulation according to the thermal flow field parameters and the high and low temperature fluid heat dissipation correlation formula.

[0006] According to a vehicle engine cooling system matching method provided by the present invention, the establishment of a one-dimensional vehicle dynamic model and a one-dimensional engine cooling system model of the vehicle includes: building a basic one-dimensional engine cooling system model according to an architecture diagram of the engine cooling system; obtaining performance parameters and geometric parameters of the engine cooling system, adjusting the basic one-dimensional engine cooling system model based on the performance parameters and geometric parameters, and establishing the one-dimensional engine cooling system model.

[0007] According to a vehicle engine cooling system matching method provided by the present invention, after establishing the one-dimensional engine cooling system model, the method also includes: obtaining the resistance parameters of the engine cooling system, fitting according to the resistance parameters, and obtaining a resistance curve to input into the one-dimensional engine cooling system model.

[0008] According to a vehicle engine cooling system matching method provided by the present invention, a three-dimensional simulation model of the engine compartment of the vehicle is established, and a thermal flow field simulation is performed based on the three-dimensional simulation model of the engine compartment to obtain the thermal flow field model of the engine compartment, including: geometrically processing a preset three-dimensional simulation model of the vehicle and generating a surface mesh; encrypting key areas of the surface mesh to establish the three-dimensional simulation model of the engine compartment of the vehicle and generate an external flow field; inputting boundary conditions and resistance parameters of the three-dimensional simulation model of the engine compartment of the vehicle to obtain a basic engine compartment thermal flow field model; judging whether the basic engine compartment thermal flow field model is divergent; if so, monitoring the maximum speed of the external flow field, adjusting the mesh units of the basic engine compartment thermal flow field model until the basic engine compartment thermal flow field model is stable, and obtaining the engine compartment thermal flow field model.

[0009] According to a vehicle engine cooling system matching method provided by the present invention, the actual working condition of the whole vehicle includes the extreme working condition of the whole vehicle, the heat load parameters are determined according to the actual working condition of the whole vehicle, the heat load parameters are input into the thermal flow field model of the engine compartment, and the heat flow field parameters are output, including: determining extreme heat load parameters according to the extreme working condition of the whole vehicle, inputting the extreme heat load parameters into the thermal flow field model of the engine compartment, and outputting extreme heat flow field parameters; inputting the heat flow field parameters into the one-dimensional engine cooling system model for coupled simulation, and outputting the simulation key performance parameters of the one-dimensional engine cooling system model, including: inputting the extreme heat flow field parameters into the one-dimensional engine The cooling system model is coupled simulated to output the extreme simulation key performance parameters of the one-dimensional engine cooling system model; the target key performance parameters include extreme target key performance parameters and cycle target key performance parameters, and the simulation key performance parameters of the one-dimensional engine cooling system module and the target key performance parameters of the one-dimensional engine cooling system module are compared to perform matching design of the vehicle engine cooling system, including: comparing the extreme simulation key performance parameters of the one-dimensional engine cooling system module under the extreme working conditions of the whole vehicle and the extreme target key performance parameters of the one-dimensional engine cooling system module to perform matching design of components of the vehicle engine cooling system.

[0010] According to a vehicle engine cooling system matching method provided by the present invention, the actual working condition of the whole vehicle also includes a preset whole vehicle standard cycle working condition. After the matching design of the components of the vehicle engine cooling system is performed, the method also includes: determining the cycle heat load parameters according to the preset whole vehicle standard cycle working condition, inputting the cycle heat load parameters into the engine compartment thermal flow field model, and outputting the cycle heat flow field parameters; inputting the cycle heat flow field parameters into the one-dimensional engine cooling system model for coupled simulation, obtaining the time domain curve of the simulation key performance parameters of the one-dimensional engine cooling system module, and outputting the cycle simulation key performance parameters of the one-dimensional engine cooling system model based on the time domain curve; comparing the cycle simulation key performance parameters of the one-dimensional engine cooling system module under the preset whole vehicle standard cycle working condition with the cycle target key performance parameters of the one-dimensional engine cooling system module, and performing matching design of the control strategy of the vehicle engine cooling system.

[0011] The present invention also provides a vehicle engine cooling system matching device, comprising: a one-dimensional model building module, used to establish a one-dimensional vehicle power model and a one-dimensional engine cooling system model of the vehicle; a three-dimensional model building module, used to establish a three-dimensional simulation model of the engine compartment of the vehicle, and perform thermal flow field simulation based on the three-dimensional simulation model of the engine compartment to obtain a thermal flow field model of the engine compartment; a thermal flow field parameter output module, used to determine the thermal load parameters according to the actual working conditions of the whole vehicle, input the thermal load parameters into the thermal flow field model of the engine compartment, and output the thermal flow field parameters; a coupling simulation module, used to input the thermal flow field parameters into the one-dimensional engine cooling system model for coupling simulation, and output the simulation key performance parameters of the one-dimensional engine cooling system model; a matching design module, used to compare the simulation key performance parameters of the one-dimensional engine cooling system module with the target key performance parameters of the one-dimensional engine cooling system module, and perform matching design of the vehicle engine cooling system so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

[0012] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-mentioned vehicle engine cooling system matching methods when executing the program.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the vehicle engine cooling system matching method as described in any one of the above is implemented.

[0014] The vehicle engine cooling system matching method, device and storage medium provided by the embodiments of the present invention establish a one-dimensional engine cooling system model of the vehicle and a three-dimensional engine compartment simulation model, perform thermal flow field simulation based on the three-dimensional engine compartment simulation model to obtain the engine compartment thermal flow field model, input heat load parameters into the engine compartment thermal flow field model, input the thermal flow field parameters output by the engine compartment thermal flow field model into the one-dimensional engine cooling system model, perform coupled simulation of the engine compartment thermal flow field model and the one-dimensional engine cooling system model, and form a closed-loop simulation of the engine cooling system. This can increase the accuracy of the simulation key performance parameters output by the one-dimensional engine cooling system model, thereby reducing the design margin of the engine cooling system and reducing the manufacturing cost of commercial vehicles while ensuring the heat dissipation effect of the engine cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a flow chart of the vehicle engine cooling system matching method provided by the present invention.

[0017] Figure 2 It is one of the schematic diagrams of the three-dimensional simulation model of the wind tunnel and the vehicle involved in the vehicle engine cooling system matching method provided by the present invention.

[0018] Figure 3 This is the second schematic diagram of the three-dimensional simulation model of the wind tunnel and the vehicle involved in the vehicle engine cooling system matching method provided by the present invention.

[0019] Figure 4 It is a schematic diagram of a one-dimensional simulation model of a vehicle involved in the vehicle engine cooling system matching method provided by the present invention.

[0020] Figure 5 It is a structural schematic diagram of a vehicle engine cooling system matching device provided by the present invention.

[0021] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Combine the following Figure 1-Figure 6 The present invention describes a vehicle engine cooling system matching method, device and storage medium.

[0024] With the development of automobile technology and the rapid economic development, the weight of commercial vehicles is getting heavier, which means that the power requirements for commercial vehicle engines are getting higher and higher, which means that the engines have higher heat dissipation requirements, which poses a higher challenge to the matching of engine cooling systems. In order to ensure that the engine does not overheat, generally speaking, the engine cooling system uses larger radiators, water pumps and fans, which makes the system design margin larger, resulting in excessive manufacturing costs and economic costs. In response to this problem, the present invention provides a vehicle engine cooling system matching method. Figure 1 FIG. 1 is one of the flow charts of the vehicle engine cooling system matching method provided by the present invention, such as Figure 1 As shown, the method includes steps 101 to 105.

[0025] Step 101: Establish a one-dimensional vehicle dynamic model and a one-dimensional engine cooling system model.

[0026] Specifically, a one-dimensional vehicle power model is a model that simulates and analyzes the dynamic behavior of a vehicle under different conditions. For example, the one-dimensional vehicle power model may include a driver module, an engine power module, a gearbox module, a final reducer module, an ECU (Electronic Control Unit) module, and a TCU (Transmission Control Unit) module. The control strategy of controllers such as the ECU may be a basic power and economic control strategy. The one-dimensional vehicle power model may be used for output torque calculation, fuel consumption calculation, and heat loss calculation.

[0027] Exemplarily, the one-dimensional vehicle dynamics model can select the user-defined mode. The engine torque file or the brake mean effective pressure file can be input through the universal characteristic data of the engine bench, and the torque or brake mean effective pressure is a function of the engine speed and the throttle opening. At the same time, the fuel consumption file is input, and the fuel consumption is a function of the engine speed and the brake mean effective pressure. In the heat loss calculation, the friction mean effective pressure file can be retained or cancelled; and the combustion heat loss is the key to the data transmission between the vehicle dynamics model and the cooling system model. The combustion heat loss file can be determined according to the engine bench thermal balance test as a function of the engine speed and the brake mean effective pressure to obtain a one-dimensional vehicle dynamics model.

[0028] The gearbox module may include a flywheel unit, a clutch unit, and a main shaft unit, etc., and the number of forward gears or reverse gears is set based on the actual working conditions. Optionally, parameters such as the speed ratio of each gear, the transmission efficiency of each gear, and the efficiency of the power output shaft can be further adjusted. The ECU can receive acceleration instructions from the driver module, obtain basic information of the engine module, and send control instructions to the engine module. The control modes of the ECU may include idle speed adjustment mode, braking mode, creep mode, drive mode, maximum speed adjustment mode, etc., among which the engine speed when the clutch is engaged and disengaged in the creep mode can be set. The TCU module is in manual mode, and the gear engagement time, clutch engagement time, etc. can be set. Optionally, the TCU module can be switched to manual and automatic.

[0029] In addition, the one-dimensional vehicle power model may also include modules such as cab exterior, mask, bumper, cooling module, cooling module bracket, fan cover, expansion tank, fender, wheel cover, fan, engine, gearbox, axle, wheel hub assembly, intake and exhaust system, and set the layout state of at least some modules, such as air conditioner module, return air baffle module, cab front suspension system module, combined bracket module, etc. Engine exhaust can be obtained based on the intake and exhaust system.

[0030] The one-dimensional engine cooling system model is a model that simulates and analyzes the cooling system performance of the engine during operation. Exemplarily, the one-dimensional engine cooling system model may include a water pump module, a cooling line module, a thermostat module, an engine thermal module, a radiator module, an oil cooler module, a fan module, and an expansion tank module. Among them, the radiator module of the one-dimensional engine cooling system model is an advanced physical model, and the other modules of the one-dimensional engine cooling system model are all physical models based on MAP. The advanced physical model is a model that can describe the internal physical processes and geometric features of the components in detail. An exemplary radiator module may include geometric parameters such as fin spacing, fin length, fin thickness, cooling water pipe width, cooling water pipe wall thickness, cooling water pipe spacing, etc. The physical model based on MAP is a simplified model. Among them, MAP can refer to a performance diagram, which displays the performance parameters of the module under different working conditions, such as flow, pressure, temperature, etc.

[0031] The water pump module can be a centrifugal mechanical water pump module. The key input parameter can be the water pump head file, which is a function of speed and flow rate; the input speed of the water pump module can be the product of the engine speed and proportional gain. The water pump efficiency can be set as a constant to simplify the model building process, or it can be set as a data file to better characterize the energy consumption of the thermal management system. The data file can be a function of speed and flow rate. The key input parameters of the fan module include fan diameter, reference speed PQ curve, efficiency curve, etc., which are mainly used to calculate the power consumption of the fan.

[0032] Step 102: Establish a three-dimensional simulation model of the engine compartment of the vehicle, and perform thermal flow field simulation based on the three-dimensional simulation model of the engine compartment to obtain a thermal flow field model of the engine compartment.

[0033] Specifically, the engine compartment 3D simulation model is a model that simulates substantially all relevant 3D geometrical and physical properties in the engine compartment. Exemplarily, the engine compartment 3D simulation model may include spatial arrangements such as components and corresponding arrangements in the engine compartment. The engine compartment thermal flow field model is a model for simulating and analyzing heat transfer and fluid flow in the engine compartment.

[0034] Step 103: determine heat load parameters according to the actual working condition of the whole vehicle, input the heat load parameters into the engine compartment thermal flow field model, and output the thermal flow field parameters.

[0035] Specifically, the heat load parameter represents the total amount of heat to be dissipated by the engine cooling system. The thermal flow field parameter is a physical parameter that describes the characteristics and behavior of the thermal flow field. Exemplarily, the thermal flow field parameter may include the inlet air flow rate and inlet air temperature of a one-dimensional engine cooling system model.

[0036] Step 104: input the thermal flow field parameters into the one-dimensional engine cooling system model for coupled simulation, and output simulation key performance parameters of the one-dimensional engine cooling system model.

[0037] Specifically, the simulation key performance parameters are parameters that directly affect the cooling efficiency, stability and energy consumption of the engine cooling system. Exemplarily, the simulation key performance parameters may include engine inlet and outlet water temperature, water flow rate, water pump power consumption, fan power consumption and heat exchanger working fluid temperature difference.

[0038] The thermal flow field parameters output by the engine compartment thermal flow field model can describe the complex flow and heat transfer of the fluid in the engine compartment space. The simulation key performance parameters output by the one-dimensional engine cooling system model can describe the simple flow and heat transfer of the fluid in the pipeline. In this way, through coupled simulation, the heat dissipation efficiency, energy consumption level and overall performance of the cooling system can be comprehensively evaluated to achieve the best cooling effect and the lowest energy consumption.

[0039] Step 105: Compare the simulation key performance parameters of the one-dimensional engine cooling system module with the target key performance parameters of the one-dimensional engine cooling system module, and perform matching design of the vehicle engine cooling system so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

[0040] Specifically, the target key performance parameter and the preset range can be set based on the performance requirements of the cooling system, and the simulation key performance parameter and the target key performance parameter can correspond one to one. For example, if the simulated engine outlet water temperature is lower than the corresponding target engine outlet water temperature, the difference between the simulated engine outlet water temperature and the target engine outlet water temperature is within the preset range.

[0041] The vehicle engine cooling system matching method provided by the embodiment of the present invention establishes a one-dimensional engine cooling system model of the vehicle and a three-dimensional engine compartment simulation model, performs thermal flow field simulation based on the three-dimensional engine compartment simulation model to obtain the engine compartment thermal flow field model, inputs heat load parameters into the engine compartment thermal flow field model, inputs the thermal flow field parameters output by the engine compartment thermal flow field model into the one-dimensional engine cooling system model, performs coupled simulation of the engine compartment thermal flow field model and the one-dimensional engine cooling system model, and forms a closed-loop simulation of the engine cooling system, which can increase the accuracy of the simulation key performance parameters output by the one-dimensional engine cooling system model, thereby reducing the design margin of the engine cooling system and reducing the manufacturing cost of commercial vehicles while ensuring the heat dissipation effect of the engine cooling system.

[0042] Based on the above embodiment, the one-dimensional engine cooling system model includes a heat exchanger; before the thermal flow field parameters are input into the one-dimensional engine cooling system model for coupled simulation, the method also includes: fitting according to the heat transfer performance calculation method of the heat exchanger to obtain a high and low temperature fluid heat dissipation correlation formula and input it into the one-dimensional engine cooling system model; inputting the thermal flow field parameters into the one-dimensional engine cooling system model for coupled simulation, specifically including: inputting the thermal flow field parameters into the one-dimensional engine cooling system model so that the one-dimensional engine cooling system model performs coupled simulation according to the thermal flow field parameters and the high and low temperature fluid heat dissipation correlation formula.

[0043] Specifically, the heat exchanger may include an intercooler and a radiator, the intercooler may be an air-to-air heat exchanger, and the radiator may be a liquid-to-air heat exchanger. The total amount of heat to be dissipated by the engine cooling system may include the heat to be dissipated by the intercooler and the heat to be dissipated by the radiator. The air intake flow and air intake temperature of the one-dimensional engine cooling system model may include the air intake flow of the intercooler, the air intake temperature of the intercooler, the air intake flow of the radiator, and the air intake temperature of the radiator. It should be further explained that the air intake flow and air intake temperature of the radiator and the intercooler may be the air intake flow and air intake temperature on the wind side, and the air intake flow and air intake temperature on the wind side may be functions of the fan speed and the vehicle speed.

[0044] For example, the wind tunnel test of the heat exchanger unit can be used to obtain the intercooler air flow rate, intercooler air flow temperature, radiator air flow rate and radiator air flow temperature under different cold and hot fluid conditions, or the heat exchange amount of the heat exchanger under different cold and hot fluid flow rates / flow rates. Figure 2 and Figure 3 As shown, for example, a 7L×5W×3H wind tunnel and a three-dimensional simulation model of a vehicle can be established, wherein L is the length of the three-dimensional simulation model of the vehicle, W is the width of the three-dimensional simulation model of the vehicle, and H is the height of H. The three-dimensional simulation model of the vehicle includes a three-dimensional simulation model of the engine compartment of the vehicle, which is used to calculate the thermal flow field parameters of the engine compartment under different vehicle speeds, ambient temperatures, engine speeds, and engine load rates, such as the steady-state flow field and temperature field in the engine compartment.

[0045] The radiator is an advanced physical model, which may include macro-geometric parameters, water-side parameters and air-side parameters; the macro-geometric parameters mainly include width, height, thickness, flow direction, number of tube rows, etc., the water-side parameters mainly include water tube height and water tube thickness, and the air-side parameters mainly include the number of external fins, fin height, fin spacing, fin thickness, fin efficiency, etc.

[0046] For example, the heat dissipation performance of the radiator can be modeled using the Ntu method (number of heat transfer units method). Specifically, the heat dissipation correlation equation of the high and low temperature fluids of the radiator can be obtained using the following formula.

[0047]

[0048] Among them, Ntu is the number of heat transfer units, U is the heat transfer coefficient of the heat exchanger, A is the heat transfer area of ​​the heat exchanger, is the heat capacity flow rate on the air side, in W / K; is the air side convective heat transfer coefficient, in W / (m2·K); is the heat exchange area of ​​the air side radiator; is the convective heat transfer coefficient on the coolant side, in W / (m2·K); is the heat exchange area of ​​the radiator on the coolant side; is the thermal conductivity of the solid, unit is W / (m·K); is the thermal conductivity of the fluid, in units of W / (m·K); Nu is the heat dissipation correlation formula for high and low temperature fluids.

[0049] According to the radiator heat exchange performance test data, including heat exchange, air inlet speed, air inlet temperature, water flow, water inlet temperature and other parameters, the Nu of the air side and the water side of the radiator are calibrated to obtain the high and low temperature fluid heat dissipation correlation formula of the radiator. The high and low temperature fluid heat dissipation correlation formula can also be expressed as Nu=f(Re,Pr).

[0050] The intercooler is also an advanced physical model, which can include macroscopic geometric parameters, high temperature air side parameters and low temperature air side parameters; on the high temperature air side, the fin parameters in the high temperature air side channel need to be input, including fin thickness, efficiency, fin spacing and other parameters. The intercooler modeling method is similar to the radiator modeling method. On this basis, the method of obtaining the high and low temperature fluid heat dissipation correlation of the intercooler is also similar to that of the radiator, so I will not repeat it here.

[0051] In one embodiment, a key input file of the radiator is water side resistance data, which is a function of flow rate. In another embodiment, laminar flow and turbulent flow need to be considered when obtaining high and low temperature fluid heat dissipation correlation formulas of the intercooler and the radiator.

[0052] The thermal flow field parameters may include the air inlet flow rate of the intercooler, the air inlet temperature of the intercooler, the air inlet flow rate of the radiator and the air inlet temperature of the radiator. Thus, from the aforementioned process of obtaining the high and low temperature fluid heat dissipation correlation formula, it can be known that the high and low temperature fluid heat dissipation correlation formula can be obtained based on the pre-acquired thermal flow field parameters. Therefore, under the premise that there is a high and low temperature fluid heat dissipation correlation formula in the one-dimensional engine cooling system model, the thermal flow field parameters are input into the one-dimensional engine cooling system model, so that the one-dimensional engine cooling system model can predict and output the simulation key performance parameters of the one-dimensional engine cooling system model, realize the coupled simulation of the engine compartment thermal flow field model and the one-dimensional engine cooling system model, and comprehensively evaluate the heat dissipation efficiency, energy consumption level and overall performance of the cooling system to achieve the best cooling effect and the lowest energy consumption.

[0053] Based on the above embodiments, the one-dimensional vehicle dynamic model and the one-dimensional engine cooling system model are established, including: building a basic one-dimensional engine cooling system model according to the architecture diagram of the engine cooling system; obtaining the performance parameters and geometric parameters of the engine cooling system, adjusting the basic one-dimensional engine cooling system model based on the performance parameters and geometric parameters, and establishing the one-dimensional engine cooling system model. In this way, a more accurate one-dimensional engine cooling system model can be established to evaluate the heat dissipation efficiency, energy consumption level and overall performance accuracy of the cooling system, so as to achieve the best cooling effect and the lowest energy consumption.

[0054] For example, based on the engine cooling system architecture diagram, corresponding component models and pipeline models can be built in AMESim to obtain a basic one-dimensional engine cooling system model. The performance parameters and geometric parameters of key components of the engine cooling system can be obtained, and the basic one-dimensional engine cooling system model can be adjusted to establish a one-dimensional engine cooling system model. Among them, key components may include water pumps, radiators, thermostats, hydraulic retarders, oil coolers, pipelines, and engines.

[0055] Based on the vehicle power system architecture diagram, the corresponding basic vehicle power model can be built in AMESim. The performance parameters and geometric parameters of the modules of the aforementioned vehicle power model can be obtained to adjust the basic vehicle power model and establish the vehicle power model.

[0056] Based on the above embodiments, after the one-dimensional engine cooling system model is established, the method further includes: obtaining the resistance parameters of the engine cooling system, performing fitting according to the resistance parameters, obtaining a resistance curve and inputting it into the one-dimensional engine cooling system model. In this way, the one-dimensional engine cooling system model can be increased in terms of accuracy and convenience in reflecting the resistance performance of each component under actual working conditions.

[0057] For example, the resistance parameters of the engine cooling system, such as flow resistance and flow rate, pressure loss and other parameters, can be obtained based on physical experiments. The obtained resistance parameters are processed using curve fitting technology.

[0058] Fitting a resistance curve: For example, the resistance parameters may be fitted based on polynomial fitting or exponential smoothing, and the resistance curve may be finally obtained after multiple iterations.

[0059] Based on the above embodiments, a three-dimensional simulation model of the engine compartment of the vehicle is established, and a thermal flow field simulation is performed based on the three-dimensional simulation model of the engine compartment to obtain the thermal flow field model of the engine compartment, including: geometrically processing the preset three-dimensional simulation model of the vehicle and generating a surface mesh; encrypting the key areas of the surface mesh to establish the three-dimensional simulation model of the engine compartment of the vehicle, and generating an external flow field; inputting the boundary conditions and resistance parameters of the three-dimensional simulation model of the engine compartment of the vehicle to obtain a basic engine compartment thermal flow field model; judging whether the basic engine compartment thermal flow field model is divergent; if so, monitoring the maximum speed of the external flow field, adjusting the mesh units of the basic engine compartment thermal flow field model, until the basic engine compartment thermal flow field model is stable, to obtain the engine compartment thermal flow field model.

[0060] The preset vehicle 3D simulation model may be a vehicle 3D simulation model created in advance using computer-aided design software, or may be a vehicle 3D simulation model obtained by using 3D scanning technology to obtain the geometric shapes of various vehicle components and then using reverse engineering technology.

[0061] The preset vehicle 3D simulation model can be meshed to generate a surface mesh. The key area can be the area in the surface mesh corresponding to the engine compartment 3D simulation model. The mesh density of the area corresponding to the engine compartment 3D simulation model can be increased through encryption processing, thereby providing a finer-grained numerical representation and improving the accuracy of the simulation results. The external flow field is the flow area outside the engine compartment. Furthermore, the heat exchanger domain and the fan rotation domain can also be generated to better understand the actual working conditions of the engine compartment.

[0062] For example, the preset vehicle 3D simulation model can be geometrically processed in Hypermesh or ANSA to generate a surface mesh, which can be imported into Star CCM+ for processing to obtain a 3D simulation model of the engine compartment, external flow field, heat exchanger domain, and fan rotation domain.

[0063] By inputting the boundary conditions and resistance parameters of the three-dimensional simulation model of the engine compartment of the vehicle, the heat flow and pressure distribution in the actual working conditions, the velocity, flow direction of the fluid and the resistance of the working fluid when passing through the engine compartment can be simulated, thereby simulating the air flow and heat transfer process, and obtaining the basic engine compartment thermal flow field model reflecting the actual working conditions. Exemplarily, the resistance parameter is the wind side resistance data of the cooling module, which may include the viscous resistance coefficient and the inertial resistance coefficient. The cooling module may also be referred to as the front-end cooling module, which may include a condenser unit, an intercooler unit and a radiator unit. A porous medium model may be used to characterize the flow resistance on the air side, and the inertial resistance coefficient and the viscous resistance coefficient of the porous medium are fitted by polynomials. Among them, the condenser unit, the intercooler unit and the radiator unit respectively establish their own reference coordinate systems. The condenser unit may use a single fluid heat exchanger model to characterize the heat exchange capacity, and the intercooler unit and the radiator unit may use a single fluid heat exchanger model to characterize the heat exchange capacity. A dual fluid heat exchanger model may also be used, and the corresponding UAG table needs to be fitted according to the monomer performance test data. The fan module can use the MRF method to characterize the cooling airflow generated by the fan rotation, establish the fan rotation coordinate system and set the corresponding fan speed.

[0064] By monitoring the maximum velocity of the external flow field, it is possible to identify abnormally high velocity areas in the external flow field, thereby identifying invalid grid cells. By removing invalid grid cells and optimizing the grid quality, numerical errors can be reduced, the accuracy and stability of the basic engine compartment thermal flow field model can be improved, and the engine compartment thermal flow field model can be obtained.

[0065] Based on the above embodiments, the actual working condition of the whole vehicle includes the extreme working condition of the whole vehicle, and the heat load parameters are determined according to the actual working condition of the whole vehicle, and the heat load parameters are input into the thermal flow field model of the engine compartment, and the heat flow field parameters are output, including: determining the extreme heat load parameters according to the extreme working condition of the whole vehicle, and inputting the extreme heat load parameters into the thermal flow field model of the engine compartment, and outputting the extreme heat flow field parameters; inputting the heat flow field parameters into the one-dimensional engine cooling system model for coupled simulation, and outputting the simulation key performance parameters of the one-dimensional engine cooling system model, including: inputting the extreme heat flow field parameters into the one-dimensional engine cooling system model for coupled simulation Coupled simulation is performed to output extreme simulation key performance parameters of the one-dimensional engine cooling system model; the target key performance parameters include extreme target key performance parameters and cycle target key performance parameters, and the simulation key performance parameters of the one-dimensional engine cooling system module are compared with the target key performance parameters of the one-dimensional engine cooling system module to perform matching design of the vehicle engine cooling system, including: comparing the extreme simulation key performance parameters of the one-dimensional engine cooling system module under the extreme working conditions of the whole vehicle with the extreme target key performance parameters of the one-dimensional engine cooling system module to perform matching design of components of the vehicle engine cooling system.

[0066] For example, see Figure 4 As shown, in the one-dimensional simulation model of the vehicle, the driver module can be used to simulate the high-temperature, full-load, low-speed climbing condition, adjust the gearbox module gear, output the maximum throttle opening, determine that the engine module is at the maximum torque and maximum power point, simulate the extreme working conditions of the whole vehicle to determine the extreme heat load parameters, input the one-dimensional engine cooling system module, and predict the thermal balance performance of the whole vehicle to ensure that the engine can maintain a suitable temperature range during operation to prevent overheating or insufficient cooling. Among them, the thermal balance performance of the whole vehicle can be the low-speed climbing condition, and the liquid temperature difference and gas temperature difference when the engine module is at the maximum torque and maximum power point. Among them, the average temperature rise of the condenser inlet air can be used as an evaluation index for whether the thermal balance of the whole vehicle is achieved. For example, if the average temperature rise of the inlet air is ≥5℃, the thermal balance of the whole vehicle is not achieved. The front mask module, the engine compartment space layout and the fan cover module are optimized to reduce heat reflux; if the average temperature rise of the inlet air is <5℃, it is optimized based on the reflux parameters in the engine compartment to achieve thermal balance of the whole vehicle. The extreme heat load parameters are basically the same as the heat load parameter categories, which will not be repeated here.

[0067] After the vehicle thermal balance performance prediction is completed, the extreme simulation key performance parameters can be output accordingly. The extreme simulation key performance parameters can be intercooler air inlet flow, simulated engine inlet and outlet water temperature, simulated water flow, simulated water pump power consumption, simulated fan power consumption, simulated intercooler air temperature difference and simulated radiator liquid temperature difference. A Design Manager Project can be established based on the current simulation file, and the input is engine speed, vehicle speed, fan speed, intercooler heat exchange and radiator heat exchange to perform DOE calculation and output extreme simulation key performance parameters. Among them, the intercooler heat exchange and radiator heat exchange can be obtained by looking up the engine speed and torque MAP table. The fan speed can also be determined by the engine speed and torque. The extreme simulation key performance parameters may include the temperature after the intercooler.

[0068] By comparing the simulated engine inlet and outlet water temperatures (also known as the engine coolant outlet temperature) with the target engine inlet and outlet water temperatures, if the simulated engine inlet and outlet water temperatures are higher than the target engine inlet and outlet water temperatures, the thermal flow field of the engine compartment and the size of the radiator are optimized until the simulated engine inlet and outlet water temperatures are lower than the target engine inlet and outlet water temperatures. After the simulated engine inlet and outlet water temperatures are lower than the target engine inlet and outlet water temperatures, the simulated water pump power consumption is compared with the target water pump power consumption. If the simulated water pump power consumption is higher than the target water pump power consumption, the component selection is optimized until the simulated water pump power consumption is lower than the target water pump power consumption; the simulated fan power consumption is compared with the target fan power consumption. If the simulated fan power consumption is higher than the target fan power consumption, the component selection is optimized until the simulated fan power consumption is lower than the target fan power consumption. Optimizing the component selection can be to select other components from the preset different models of components and establish corresponding component modules, replace the component modules in the current model, so as to match the components of the vehicle engine cooling system.

[0069] Based on the above embodiments, the actual working condition of the whole vehicle also includes a preset whole vehicle standard cycle working condition. After the matching design of the components of the vehicle engine cooling system is performed, the method also includes: determining the cycle heat load parameters according to the preset whole vehicle standard cycle working condition, inputting the cycle heat load parameters into the engine compartment thermal flow field model, and outputting the cycle heat flow field parameters; inputting the cycle heat flow field parameters into the one-dimensional engine cooling system model for coupled simulation, obtaining the time domain curve of the simulation key performance parameters of the one-dimensional engine cooling system module, and outputting the cycle simulation key performance parameters of the one-dimensional engine cooling system model based on the time domain curve; comparing the cycle simulation key performance parameters of the one-dimensional engine cooling system module under the preset whole vehicle standard cycle working condition and the cycle target key performance parameters of the one-dimensional engine cooling system module, and performing matching design of the control strategy of the vehicle engine cooling system.

[0070] The working principle and technical effect of the output cycle thermal flow field parameters are basically the same as the working principle and technical effect of the output extreme thermal flow field parameters, which will not be repeated here.

[0071] The preset vehicle standard cycle condition may be CHTC (China Heavy-duty Test Cycle, heavy-duty commercial vehicle test condition) or CLTC (China Light-duty Vehicle Test Cycle, China light-duty vehicle driving condition), etc. For example, the corresponding vehicle standard cycle condition can be preset by the driver module according to the simulated commercial vehicle type. The commercial vehicle type may include passenger cars, tractors, trucks and engineering vehicles, etc. When the vehicle standard cycle condition is CHTC, it may include CHTC-B, CHTC-TT, CHTC-LT, CHTC-D. The driver module can determine the response time within the target range so that the actual vehicle speed (also referred to as the cycle speed) can better follow the target speed. The target range can be determined according to the actual working conditions. The transmission control in the driver module can choose to control the time domain file of the gear through the driver control or directly input the gear position, and then control the engine control unit and the transmission control unit to control the actual vehicle speed.

[0072] The time domain curve may include time domain curves of simulated engine inlet and outlet water temperature, simulated water flow, simulated water pump power consumption, simulated fan power consumption, simulated intercooler outlet air temperature, simulated intercooler air temperature difference, and simulated radiator liquid temperature difference, etc. Exemplarily, the simulated water pump power consumption time domain curve may be integrated to obtain the simulated water pump power consumption, and the simulated fan power consumption time domain curve may be integrated to obtain the simulated fan power consumption.

[0073] By comparing the simulated engine water outlet temperature and the target engine water outlet temperature in the time domain space, if the simulated engine water outlet temperature is higher than the target engine water outlet temperature, the electronically controlled silicone oil fan control strategy is adjusted until the simulated engine water outlet temperature is lower than the target engine water outlet temperature. Further, the simulated intercooler outlet air temperature and the target intercooler outlet air temperature can be compared in the time domain space. If the simulated intercooler outlet air temperature is higher than the target intercooler outlet air temperature, the electronically controlled silicone oil fan control strategy is adjusted until the simulated intercooler outlet air temperature is lower than the target intercooler outlet air temperature. After the simulated engine water outlet temperature is lower than the target engine water outlet temperature, and the simulated intercooler outlet air temperature is lower than the target intercooler outlet air temperature, the simulated fan power consumption and the target fan power consumption can be compared in the time domain space. If the simulated fan power consumption is higher than the target fan power consumption, and the stability of the water temperature and air temperature is poor, the fan control strategy is optimized to reduce the fan power consumption, and the matching design of the control strategy of the vehicle engine cooling system is performed.

[0074] The vehicle engine cooling system matching method provided in this embodiment can obtain the real-time status of the vehicle, increase the coordination between the engine cooling system components, and improve the cooling performance of the engine cooling system by performing matching design of the vehicle engine cooling system components and matching design of the vehicle engine cooling system control strategy.

[0075] The vehicle engine cooling system matching device provided by the present invention is described below. The vehicle engine cooling system matching device described below and the vehicle engine cooling system matching method described above can be referred to each other.

[0076] Figure 5 FIG. 1 is a schematic diagram of the structure of the vehicle engine cooling system matching device provided by the present invention. Figure 5 As shown, the device includes a one-dimensional model building module 201, a three-dimensional model building module 202, a thermal flow field parameter output module 203, a coupling simulation module 204 and a matching design module 205.

[0077] The one-dimensional model building module 201 is used to build a one-dimensional vehicle power model and a one-dimensional engine cooling system model of the vehicle.

[0078] The three-dimensional model building module 202 is used to build a three-dimensional simulation model of the engine compartment of the vehicle, and perform thermal flow field simulation based on the three-dimensional simulation model of the engine compartment to obtain a thermal flow field model of the engine compartment.

[0079] The thermal flow field parameter output module 203 is used to determine the thermal load parameters according to the actual working conditions of the whole vehicle, input the thermal load parameters into the thermal flow field model of the engine compartment, and output the thermal flow field parameters.

[0080] The coupling simulation module 204 is used to input the thermal flow field parameters into the one-dimensional engine cooling system model for coupling simulation, and output simulation key performance parameters of the one-dimensional engine cooling system model.

[0081] The matching design module 205 is used to compare the simulation key performance parameters of the one-dimensional engine cooling system module with the target key performance parameters of the one-dimensional engine cooling system module, and perform matching design of the vehicle engine cooling system so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

[0082] Based on the above embodiments, the one-dimensional engine cooling system model includes a heat exchanger; the vehicle engine cooling system matching device also includes a high and low temperature fluid heat dissipation correlation acquisition module, which is used to fit according to the heat transfer performance calculation method of the heat exchanger to obtain the high and low temperature fluid heat dissipation correlation formula and input it into the one-dimensional engine cooling system model.

[0083] The coupling simulation module 204 is specifically used to: input the thermal flow field parameters into the one-dimensional engine cooling system model, so that the one-dimensional engine cooling system model performs coupling simulation according to the thermal flow field parameters and the high and low temperature fluid heat dissipation correlation formula.

[0084] Based on the above embodiments, the one-dimensional model building module 201 is specifically used to: build a basic one-dimensional engine cooling system model according to the architecture diagram of the engine cooling system; obtain the performance parameters and geometric parameters of the engine cooling system, adjust the basic one-dimensional engine cooling system model based on the performance parameters and geometric parameters, and establish the one-dimensional engine cooling system model.

[0085] Based on the above embodiments, the vehicle engine cooling system matching device also includes a resistance curve acquisition module, which is used to obtain the resistance parameters of the engine cooling system, perform fitting according to the resistance parameters, and obtain a resistance curve to input into the one-dimensional engine cooling system model.

[0086] Based on the above embodiments, the three-dimensional model establishment module 202 is specifically used to: perform geometric processing on a preset vehicle three-dimensional simulation model and generate a surface mesh; perform encryption processing on key areas of the surface mesh to establish a three-dimensional simulation model of the vehicle's engine compartment, and generate an external flow field; input boundary conditions and resistance parameters of the vehicle's engine compartment three-dimensional simulation model to obtain a basic engine compartment thermal flow field model; determine whether the basic engine compartment thermal flow field model is divergent; if so, monitor the maximum speed of the external flow field, adjust the grid units of the basic engine compartment thermal flow field model until the basic engine compartment thermal flow field model is stable, and obtain the engine compartment thermal flow field model.

[0087] Based on the above embodiments, the actual working conditions of the whole vehicle include extreme working conditions of the whole vehicle. The thermal flow field parameter output module 203 is specifically used to: determine extreme thermal load parameters according to the extreme working conditions of the whole vehicle, input the extreme thermal load parameters into the thermal flow field model of the engine compartment, and output extreme thermal flow field parameters.

[0088] The coupling simulation module 204 is specifically used to: input the extreme thermal flow field parameters into the one-dimensional engine cooling system model for coupling simulation, and output the extreme simulation key performance parameters of the one-dimensional engine cooling system model.

[0089] The matching design module 205 is specifically used to compare the extreme simulation key performance parameters of the one-dimensional engine cooling system module under the extreme working conditions of the whole vehicle with the extreme target key performance parameters of the one-dimensional engine cooling system module to perform matching design of components of the vehicle engine cooling system.

[0090] Based on the above embodiments, the actual working condition of the whole vehicle also includes a preset standard cycle working condition of the whole vehicle; the thermal flow field parameter output module 203 is specifically used for: after the matching design of the components of the vehicle engine cooling system, determining the cycle heat load parameters according to the preset standard cycle working condition of the whole vehicle, inputting the cycle heat load parameters into the thermal flow field model of the engine compartment, and outputting the cycle heat flow field parameters.

[0091] The coupling simulation module 204 is further specifically used to: input the cycle thermal flow field parameters into the one-dimensional engine cooling system model for coupling simulation, obtain the time domain curve of the simulation key performance parameters of the one-dimensional engine cooling system module, and output the cycle simulation key performance parameters of the one-dimensional engine cooling system model based on the time domain curve; The matching design module 205 is also specifically used to compare the cycle simulation key performance parameters of the one-dimensional engine cooling system module under the preset vehicle standard cycle conditions with the cycle target key performance parameters of the one-dimensional engine cooling system module to perform matching design of the control strategy of the vehicle engine cooling system.

[0092] Figure 6 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6 As shown, the electronic device may include: a processor 310 , a communications interface 320 , a memory 330 and a communication bus 340 , wherein the processor 310 , the communications interface 320 , and the memory 330 communicate with each other via the communication bus 340 . The processor 310 can call the logic instructions in the memory 330 to execute the vehicle engine cooling system matching method, which includes: establishing a one-dimensional vehicle power model and a one-dimensional engine cooling system model of the vehicle; establishing a three-dimensional simulation model of the engine compartment of the vehicle, performing thermal flow field simulation based on the three-dimensional simulation model of the engine compartment, and obtaining the engine compartment thermal flow field model; determining the heat load parameters according to the actual working conditions of the whole vehicle, inputting the heat load parameters into the engine compartment thermal flow field model, and outputting the heat flow field parameters; inputting the heat flow field parameters into the one-dimensional engine cooling system model for coupled simulation, and outputting the simulation key performance parameters of the one-dimensional engine cooling system model; comparing the simulation key performance parameters of the one-dimensional engine cooling system module with the target key performance parameters of the one-dimensional engine cooling system module, and performing matching design of the vehicle engine cooling system, so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

[0093] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0094] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the vehicle engine cooling system matching method provided by the above-mentioned methods, which includes: establishing a one-dimensional vehicle power model and a one-dimensional engine cooling system model of the vehicle; establishing a three-dimensional simulation model of the engine compartment of the vehicle, and performing thermal flow field simulation based on the three-dimensional simulation model of the engine compartment to obtain an engine compartment thermal flow field model; determining heat load parameters according to the actual working conditions of the whole vehicle, inputting the heat load parameters into the engine compartment thermal flow field model, and outputting heat flow field parameters; inputting the heat flow field parameters into the one-dimensional engine cooling system model for coupled simulation, and outputting simulation key performance parameters of the one-dimensional engine cooling system model; comparing the simulation key performance parameters of the one-dimensional engine cooling system module with the target key performance parameters of the one-dimensional engine cooling system module, and performing matching design of the vehicle engine cooling system, so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

[0095] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the vehicle engine cooling system matching method provided by the above-mentioned methods, the method comprising: establishing a one-dimensional vehicle power model and a one-dimensional engine cooling system model of the vehicle; establishing a three-dimensional simulation model of the engine compartment of the vehicle, performing a thermal flow field simulation based on the three-dimensional simulation model of the engine compartment, and obtaining a thermal flow field model of the engine compartment; determining a thermal load parameter according to the actual working condition of the whole vehicle, inputting the thermal load parameter into the thermal flow field model of the engine compartment, and outputting a thermal flow field parameter; inputting the thermal flow field parameter into the one-dimensional engine cooling system model for coupled simulation, and outputting simulation key performance parameters of the one-dimensional engine cooling system model; comparing the simulation key performance parameters of the one-dimensional engine cooling system module with the target key performance parameters of the one-dimensional engine cooling system module, and performing a matching design of the vehicle engine cooling system, so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

[0096] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0097] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle engine cooling system matching method, characterized in that: include: Establish a one-dimensional vehicle dynamics model and a one-dimensional engine cooling system model; Establishing a three-dimensional simulation model of the engine compartment of the vehicle, and performing thermal flow field simulation based on the three-dimensional simulation model of the engine compartment to obtain a thermal flow field model of the engine compartment; Determine heat load parameters according to the actual working condition of the vehicle, input the heat load parameters into the engine compartment thermal flow field model, and output the thermal flow field parameters; Inputting the thermal flow field parameters into the one-dimensional engine cooling system model for coupled simulation, and outputting simulation key performance parameters of the one-dimensional engine cooling system model; The simulation key performance parameters of the one-dimensional engine cooling system module are compared with the target key performance parameters of the one-dimensional engine cooling system module, and a matching design of the vehicle engine cooling system is performed so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

2. The vehicle engine cooling system matching method according to claim 1, characterized in that: The one-dimensional engine cooling system model includes a heat exchanger; before inputting the thermal flow field parameters into the one-dimensional engine cooling system model for coupled simulation, the method further includes: Fitting is performed according to the heat transfer performance calculation method of the heat exchanger to obtain a high and low temperature fluid heat dissipation correlation formula which is input into the one-dimensional engine cooling system model; Inputting the thermal flow field parameters into the one-dimensional engine cooling system model for coupled simulation specifically includes: The thermal flow field parameters are input into the one-dimensional engine cooling system model, so that the one-dimensional engine cooling system model performs coupled simulation according to the thermal flow field parameters and the high and low temperature fluid heat dissipation correlation formula.

3. The vehicle engine cooling system matching method according to claim 1, characterized in that: The one-dimensional vehicle dynamic model and the one-dimensional engine cooling system model are established, including: Build a basic one-dimensional engine cooling system model according to the engine cooling system architecture diagram; The performance parameters and geometric parameters of the engine cooling system are obtained, the basic one-dimensional engine cooling system model is adjusted based on the performance parameters and geometric parameters, and the one-dimensional engine cooling system model is established.

4. The vehicle engine cooling system matching method according to claim 3, characterized in that: After establishing the one-dimensional engine cooling system model, the method further includes: The resistance parameters of the engine cooling system are obtained, and fitting is performed according to the resistance parameters to obtain a resistance curve which is input into the one-dimensional engine cooling system model.

5. The vehicle engine cooling system matching method according to claim 1, characterized in that: Establishing a three-dimensional simulation model of the engine compartment of the vehicle, and performing thermal flow field simulation based on the three-dimensional simulation model of the engine compartment to obtain a thermal flow field model of the engine compartment, including: Performing geometric processing on a preset three-dimensional vehicle simulation model and generating a surface mesh; performing encryption processing on a key area of ​​the surface mesh to establish a three-dimensional simulation model of the engine compartment of the vehicle, and generating an external flow field; Inputting boundary conditions and resistance parameters of a three-dimensional simulation model of the engine compartment of the vehicle to obtain a basic engine compartment thermal flow field model; Determining whether the basic engine compartment thermal flow field model is divergent; If so, the maximum velocity of the external flow field is monitored, and the grid units of the basic engine compartment thermal flow field model are adjusted until the basic engine compartment thermal flow field model is stable, thereby obtaining the engine compartment thermal flow field model.

6. The vehicle engine cooling system matching method according to claim 1, characterized in that: The actual working condition of the whole vehicle includes the extreme working condition of the whole vehicle. The heat load parameter is determined according to the actual working condition of the whole vehicle, and the heat load parameter is input into the thermal flow field model of the engine compartment to output the thermal flow field parameter, including: Determine extreme heat load parameters according to the extreme working conditions of the whole vehicle, input the extreme heat load parameters into the engine compartment thermal flow field model, and output extreme heat flow field parameters; The thermal flow field parameters are input into the one-dimensional engine cooling system model for coupled simulation, and the simulation key performance parameters of the one-dimensional engine cooling system model are output, including: Inputting the extreme thermal flow field parameters into the one-dimensional engine cooling system model for coupled simulation, and outputting extreme simulation key performance parameters of the one-dimensional engine cooling system model; The target key performance parameters include extreme target key performance parameters and cycle target key performance parameters, and the simulation key performance parameters of the one-dimensional engine cooling system module are compared with the target key performance parameters of the one-dimensional engine cooling system module to perform matching design of the vehicle engine cooling system, including: By comparing the extreme simulation key performance parameters of the one-dimensional engine cooling system module under the extreme working conditions of the whole vehicle with the extreme target key performance parameters of the one-dimensional engine cooling system module, matching design of components of the vehicle engine cooling system is carried out.

7. The vehicle engine cooling system matching method according to claim 6, characterized in that: The actual working condition of the whole vehicle also includes a preset standard cycle working condition of the whole vehicle. After the matching design of the components of the vehicle engine cooling system is performed, the method further includes: Determine the cycle heat load parameters according to the preset vehicle standard cycle conditions, input the cycle heat load parameters into the engine compartment thermal flow field model, and output the cycle heat flow field parameters; Inputting the cyclic thermal flow field parameters into the one-dimensional engine cooling system model for coupled simulation, obtaining a time domain curve of the simulation key performance parameters of the one-dimensional engine cooling system module, and outputting the cyclic simulation key performance parameters of the one-dimensional engine cooling system model based on the time domain curve; By comparing the cycle simulation key performance parameters of the one-dimensional engine cooling system module under the preset vehicle standard cycle conditions with the cycle target key performance parameters of the one-dimensional engine cooling system module, a matching design of the control strategy of the vehicle engine cooling system is performed.

8. A vehicle engine cooling system matching device, characterized in that: include: One-dimensional model building module, used to build a one-dimensional vehicle power model and a one-dimensional engine cooling system model; A three-dimensional model building module, used to build a three-dimensional simulation model of the engine compartment of the vehicle, and perform thermal flow field simulation based on the three-dimensional simulation model of the engine compartment to obtain a thermal flow field model of the engine compartment; A thermal flow field parameter output module, used to determine a thermal load parameter according to the actual working condition of the vehicle, input the thermal load parameter into the thermal flow field model of the engine compartment, and output the thermal flow field parameter; A coupling simulation module, used for inputting the thermal flow field parameters into the one-dimensional engine cooling system model for coupling simulation, and outputting simulation key performance parameters of the one-dimensional engine cooling system model; A matching design module is used to compare the simulation key performance parameters of the one-dimensional engine cooling system module with the target key performance parameters of the one-dimensional engine cooling system module, and perform matching design of the vehicle engine cooling system so that the difference between the simulation key performance parameters and the target key performance parameters is within a preset range.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the vehicle engine cooling system matching method according to any one of claims 1 to 7 is implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the vehicle engine cooling system matching method according to any one of claims 1 to 7 is implemented.

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