A test method for verifying the hot and cold cycle performance of engine radiator

Abstract

The present invention discloses a test method for verifying the hot and cold cycle performance of an engine radiator, comprising the following steps: cleaning the engine radiator, installing it on a test bench, connecting a fluid circulation system and a monitoring device; setting the temperature circulation range of the coolant to ‑40°C ‑120°C, and using a temperature control device to allow the coolant to circulate within the set range; preheating the engine, and setting the low-temperature speed and high-temperature speed of the engine; sending the coolant into the radiator to start the hot and cold cycle; recording the performance parameters of the radiator at the low-temperature speed and the high-temperature speed, including the coolant inlet temperature, the coolant outlet temperature, the ambient temperature, and the coolant flow rate; and calculating the cooling cycle performance of the radiator based on the performance parameters of the radiator at the low-temperature speed and the high-temperature speed. The test method for verifying the hot and cold cycle performance of an engine radiator can perform standardized test tests on the hot and cold cycle performance of the radiator, and determine the adaptability and stability of the radiator at different temperatures.

Description

Technical Field

[0001] The invention relates to a test method for verifying the cold and hot cycle performance of an engine radiator. Background Art

[0002] The engine radiator, as a key component of the automobile cooling system, has the core function of effectively removing the heat generated by the engine when it is running. It uses the circulation mechanism of the coolant to transfer the heat accumulated inside the engine to the external environment, thereby ensuring that the engine works stably within the appropriate temperature range, preventing overheating, and thus ensuring the efficient operation of the engine and extending its service life.

[0003] The heat cycle performance of a radiator is a key indicator to measure its adaptability and durability under different temperature conditions. This performance is particularly important for radiators because they need to cope with temperature fluctuations from extremely low to extremely high. Having excellent heat cycle performance means that the radiator can still maintain optimal working conditions under extreme temperature conditions, whether it is in the cold winter or the hot summer.

[0004] Heat dissipation performance generally refers to the efficiency of the radiator in transferring heat energy, that is, the ability of the radiator to absorb heat from the engine and effectively dissipate this heat to the surrounding environment. The cooling cycle performance focuses on the radiator's ability to regulate the coolant temperature under continuous operation, and the stability of maintaining this ability under different operating conditions. This covers the radiator's adaptability to different ambient temperatures and its ability to respond to rapid fluctuations in coolant temperature. However, in the current field of radiator performance testing, the main focus is on the heat dissipation performance itself, and a set of standardized procedures specifically for testing the radiator's hot and cold cycle performance has not yet been established. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a test method for verifying the hot and cold cycle performance of an engine radiator by performing standardized test tests on the hot and cold cycle performance of the radiator, determining the adaptability and stability of the radiator at different temperatures.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A test method for verifying the hot and cold cycle performance of an engine radiator comprises the following steps:

[0008] Clean the engine radiator, install it on the test bench, and connect the fluid circulation system and monitoring equipment;

[0009] Set the coolant temperature circulation range to -40℃-120℃, and use temperature control equipment to circulate the coolant within the set range;

[0010] Preheat the engine and set the low temperature and high temperature speeds of the engine;

[0011] Send coolant into the radiator to start the hot and cold cycle;

[0012] Record the performance parameters of the radiator at low and high speeds, including coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate;

[0013] The cooling cycle performance of the radiator is calculated based on the performance parameters of the radiator at low temperature speed and high temperature speed.

[0014] Preferably, the method for preheating the engine and setting the low temperature speed and high temperature speed of the engine is:

[0015] Start the engine and run it at a low temperature speed of 800-1200r / min. After running for 5-10 minutes, the preheating is completed.

[0016] After the engine is preheated, the engine speed is gradually increased to a high temperature speed ranging from 3000 to 4000 r / min, and the test is performed under the condition of high temperature speed.

[0017] Preferably, the method for recording the performance parameters of the radiator at low temperature speed and high temperature speed is:

[0018] After the engine is started, when the engine is running at low temperature;

[0019] Record the coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate at this speed, and continue recording until the temperature stabilizes;

[0020] After the engine is started, when the engine is running at high speed;

[0021] Record the coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate at this speed, and continue recording until the temperature stabilizes.

[0022] Preferably, the method for calculating the cooling cycle performance of the radiator based on the performance parameters of the radiator at low-temperature speed and high-temperature speed is:

[0023] Calculate the actual heat dissipation of the radiator;

[0024] Calculate the theoretical heat dissipation required for the engine;

[0025] Compare the actual heat dissipation with the theoretical required heat dissipation to determine the heat dissipation efficiency;

[0026] Repeat the above calculations at low temperature speed and high temperature speed;

[0027] By comparing the heat dissipation efficiency and heat dissipation under different conditions, the cooling cycle performance of the radiator at low temperature speed and high temperature speed is obtained.

[0028] Preferably, the method for calculating the actual heat dissipation of the radiator is:

[0029] Use the following formula to calculate the heat dissipation (Q) of the heat sink:

[0030] Q=\dot{m}\cdotc_p\cdot(T_{out}-T_{in})

[0031] Where: (\dot{m}) is the mass flow rate of the coolant (kg / s), (c_p) is the specific heat capacity of the coolant (J / kg·K), (T_{out}) and (T_{in}) are the outlet and inlet temperatures of the coolant, respectively (K).

[0032] As a preferred method, the method for calculating the theoretical required heat dissipation of the radiator is:

[0033] Use the following formula to calculate the theoretical required heat dissipation (Q_{required}) of the heat sink:

[0034] Q_{required}=P_{input}-P_{output}]

[0035] Where (Q_{required}) is the amount of heat that the heat sink needs to remove, (P_{input}) is the total input power of the device, and (P_{output}) is the actual mechanical output power of the device.

[0036] Preferably, the method for determining the heat dissipation efficiency (\eta) by comparing the actual heat dissipation with the theoretically required heat dissipation is:

[0037] \eta=\left(\frac{Q_{actual}}{Q_{required}}\right)\times 100%

[0038] Among them, (Q_{actual}) is the actual heat dissipation calculated by the above formula, and (Q_{required}) is the heat that needs to be removed when the engine is running.

[0039] Preferably, the method for obtaining the cooling cycle performance of the radiator at low temperature speed and high temperature speed is:

[0040] Determine the ratio of the energy consumed by the radiator to its heat dissipation effect to obtain the energy efficiency ratio;

[0041] Determine the cooling efficiency of the radiator at low speed and high speed to obtain the temperature reduction capacity;

[0042] Set the weights of energy efficiency ratio and temperature reduction capability, and score based on the set weights to obtain the cooling cycle performance scores of the radiator at low and high speeds. The higher the score, the stronger the cooling cycle performance.

[0043] Another technical problem to be solved by the present invention is to provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a test method for verifying the hot and cold cycle performance of an engine radiator as described above is implemented.

[0044] Another technical problem to be solved by the present invention is to provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a test method for verifying the hot and cold cycle performance of an engine radiator as described in any of the above.

[0045] The beneficial effects of the present invention are:

[0046] By setting the temperature cycle range of the coolant from -40℃ to 120℃, this method aims to simulate the performance of the radiator under extreme environmental conditions, covering a wide range of challenges from severe cold to high temperatures. This initiative aims to ensure that the radiator can maintain excellent performance in all potential working environments; by comprehensively monitoring performance parameters under different speed and temperature conditions, such as the inlet and outlet temperature and flow rate of the coolant, the performance of the radiator can be comprehensively evaluated. This comprehensive evaluation helps to identify potential design defects or performance deficiencies, thereby improving the reliability and efficiency of the product; by implementing repeated hot and cold cycle tests, it is possible to detect failures and performance degradation that the radiator may encounter during long-term use. This helps to identify potential problems in advance and optimize them, thereby improving the reliability and user satisfaction of the final product; this test method strictly follows many industry standards and test protocols to help manufacturers ensure that their products meet or exceed industry requirements. This not only helps to enter the market smoothly, but also enhances consumer trust in the product; the systematic collection and analysis of performance data can directly provide valuable feedback for product research and development and improvement. This data-driven approach helps to accelerate product innovation, optimize product design, shorten iteration cycles, and ultimately achieve rapid advancement of product launch. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 The present invention is a flow chart of a test method for verifying the cooling and heating cycle performance of an engine radiator. DETAILED DESCRIPTION

[0048] The principles and features of the present invention are described below, and the examples are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described more specifically by way of example in the following paragraphs. According to the following description and claims, the advantages and features of the present invention will become clearer.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0050] Example

[0051] A test method for verifying the hot and cold cycle performance of an engine radiator comprises the following steps:

[0052] Clean the engine radiator, install it on the test bench, and connect the fluid circulation system and monitoring equipment;

[0053] Set the coolant temperature circulation range to -40℃-120℃, and use temperature control equipment to circulate the coolant within the set range;

[0054] Preheat the engine and set the low temperature and high temperature speeds of the engine;

[0055] Send coolant into the radiator to start the hot and cold cycle;

[0056] Record the performance parameters of the radiator at low and high speeds, including coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate;

[0057] The cooling cycle performance of the radiator is calculated based on the performance parameters of the radiator at low temperature speed and high temperature speed.

[0058] Radiator cleaning and inspection: The first priority is to ensure that the inside and outside of the radiator are clean, free of impurities, damage or corrosion. This is a basic measure to ensure data accuracy and prevent test accidents.

[0059] Test bench construction: The radiator needs to be accurately installed on the test bench and ensure the firmness of all connected parts. Then, connect the necessary fluid circulation system and monitoring equipment, such as temperature sensors, flow meters, etc., to ensure the smooth progress of the test.

[0060] Temperature cycle setting: Use temperature control equipment to accurately adjust the temperature range of the coolant to ensure that it can circulate stably between -40℃ and 120℃.

[0061] Engine preparation: Before starting the test, the engine needs to undergo a sufficient preheating process to achieve a stable working state. In addition, according to the specific requirements of the test, the engine speed is set at low and high temperatures to simulate the actual operating conditions.

[0062] Hot and cold cycle test: Start the fluid circulation system to circulate the coolant inside the radiator while ensuring that the set temperature change is maintained. During the entire test process, the performance parameters of the radiator must be continuously monitored and recorded, including key data such as the coolant inlet and outlet temperatures, ambient temperature, and flow rate.

[0063] Data analysis: Based on the collected data, the cooling efficiency of the radiator at different temperatures and speeds is calculated and evaluated. In-depth analysis of the radiator's performance is performed to determine whether it meets the design standards and expected goals.

[0064] The method for preheating the engine and setting the low temperature speed and high temperature speed of the engine is as follows:

[0065] Start the engine and run it at a low temperature speed of 800-1200r / min. After running for 5-10 minutes, the preheating is completed.

[0066] After the engine is preheated, the engine speed is gradually increased to a high temperature speed ranging from 3000 to 4000 r / min, and the test is performed under the condition of high temperature speed.

[0067] In order to evenly heat all engine components to operating temperature, the engine needs to be run continuously at low speed for 5 to 10 minutes to reduce mechanical wear and thermal stress during cold start and ensure stable operation of the engine.

[0068] By simulating the speed changes of an actual vehicle under different driving conditions, the performance of the radiator can be fully evaluated. This step helps to ensure that the radiator can provide reliable heat dissipation under various operating conditions.

[0069] To avoid mechanical failure or overheating caused by sudden high speed, the speed is gradually increased to high temperature. This method ensures that the engine is tested in a safe and stable environment.

[0070] Confirm that the engine, radiator, monitoring tools and other test equipment are in good condition to ensure the accuracy and safety of the test; before the test, fully check the emergency stop switch, fire equipment and other safety facilities, and ensure that the tester is familiar with the emergency handling procedures; start the engine and set the speed controller to the range of 800 to 1200 rpm. Continuously monitor the engine's temperature and pressure parameters to ensure that they fluctuate within the normal range; during the warm-up period, pay close attention to the engine's temperature, oil pressure, cooling system pressure and other key performance indicators, and promptly detect and handle any abnormalities.

[0071] After preheating is completed, increase the engine speed to 3000 to 4000 rpm in a steady and gradual manner. Avoid sudden load increases during this process to prevent damage to the engine; run the engine at high temperature and speed, and continuously monitor and record the performance data of the radiator, including key indicators such as coolant temperature, flow rate, and ambient temperature.

[0072] The method for recording the performance parameters of the radiator at low temperature speed and high temperature speed is:

[0073] After the engine is started, when the engine is running at low temperature;

[0074] Record the coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate at this speed, and continue recording until the temperature stabilizes;

[0075] After the engine is started, when the engine is running at high speed;

[0076] Record the coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate at this speed, and continue recording until the temperature stabilizes.

[0077] In order to fully understand the performance of the radiator under different load conditions, a method was adopted to record key performance parameters in detail at different speeds. Through continuous data recording, potential problems with heat dissipation efficiency, such as insufficient coolant flow or abnormal temperature, can be accurately identified, providing solid data support for design optimization. By ensuring that the radiator can maintain an efficient working state under all operating conditions, the occurrence of engine overheating is effectively prevented, thereby improving the reliability of the engine and extending its service life.

[0078] The method for calculating the cooling cycle performance of the radiator based on the performance parameters of the radiator at low speed and high speed is:

[0079] Calculate the actual heat dissipation of the radiator;

[0080] Calculate the theoretical heat dissipation required for the engine;

[0081] Compare the actual heat dissipation with the theoretical required heat dissipation to determine the heat dissipation efficiency;

[0082] Repeat the above calculations at low temperature speed and high temperature speed;

[0083] By comparing the heat dissipation efficiency and heat dissipation under different conditions, the cooling cycle performance of the radiator at low temperature speed and high temperature speed is obtained.

[0084] By calculating and comparing the actual heat dissipation with the theoretical heat dissipation requirements, the performance of the radiator can be accurately evaluated. This method not only helps to understand the performance of the radiator under standard operating conditions, but also detects the performance under extreme conditions; at the same time, the size, material or structure of the radiator can be adjusted according to the heat dissipation efficiency data to improve its performance under all operating conditions; by ensuring that the radiator can meet the cooling needs of the engine, the risk of engine overheating can be reduced, thereby extending the service life of the engine and reducing maintenance costs; by evaluating the heat dissipation efficiency at different speeds (low and high temperatures), the adaptability of the radiator under various working conditions can be understood. This is particularly important for designing cooling systems suitable for a variety of environmental conditions.

[0085] The method to calculate the actual heat dissipation of the radiator is:

[0086] Use the following formula to calculate the heat dissipation (Q) of the heat sink:

[0087] Q=\dot{m}\cdotc_p\cdot(T_{out}-T_{in})

[0088] Where: (\dot{m}) is the mass flow rate of the coolant (kg / s), (c_p) is the specific heat capacity of the coolant (J / kg·K), (T_{out}) and (T_{in}) are the outlet and inlet temperatures of the coolant, respectively (K).

[0089] This formula directly calculates the heat dissipation based on the physical properties of the coolant and the temperature difference. It is easy to operate and the results are clear and intuitive. This simplicity greatly facilitates engineers to quickly evaluate the performance of the radiator without relying on complex equipment or cumbersome processes. The formula is based on the principles of thermodynamics, ensuring the scientificity and accuracy of the calculation process. By accurately measuring the inlet temperature (T_{in}), outlet temperature (T_{out}) and flow rate (\dot{m}) of the coolant, reliable heat dissipation data can be obtained, which is extremely important for the optimization of radiator design.

[0090] In practical applications, sensors continuously monitor the coolant inlet and outlet temperatures (T_{in} and T_{out}), and flow meters accurately measure the flow rate (\dot{m}), thereby enabling real-time monitoring of radiator performance. This monitoring method helps ensure that the engine or equipment operates stably at the optimal operating temperature, effectively preventing overheating or reduced efficiency. At the same time, by comparing the theoretical calculated values ​​with the actual measured values, possible problems in the system can be discovered and diagnosed in a timely manner.

[0091] The method to calculate the theoretical heat dissipation required by the radiator is:

[0092] Use the following formula to calculate the theoretical required heat dissipation of the heat sink (Q_{required}):

[0093] Q_{required}=P_{input}-P_{output}]

[0094] Where (Q_{required}) is the amount of heat that the heat sink needs to remove, (P_{input}) is the total input power of the device, and (P_{output}) is the actual mechanical output power of the device.

[0095] This formula accurately calculates the energy that is not converted into useful work during the operation of the device, that is, energy loss. This loss is mostly in the form of heat energy, which needs to be effectively removed by the heat sink to ensure that the device operates in the best safety and efficiency state. By accurately calculating the difference between input power and output power, the design process of the cooling system can be greatly simplified.

[0096] The method for comparing the actual heat dissipation with the theoretical required heat dissipation to determine the heat dissipation efficiency (\eta) is:

[0097] \eta=\left(\frac{Q_{actual}}{Q_{required}}\right)\times 100%

[0098] Among them, (Q_{actual}) is the actual heat dissipation calculated by the above formula, and (Q_{required}) is the heat that needs to be removed when the engine is running.

[0099] By accurately comparing the actual heat dissipation with the theoretical heat dissipation required, the heat dissipation efficiency can be calculated and directly mapped to the performance of the system in the actual operating environment. As one of the key indicators for evaluating the performance of a thermal management system, the calculation result of heat dissipation efficiency can clearly indicate whether the system efficiently removes the heat generated during engine operation and whether there is potential for energy efficiency loss or design optimization. Presenting the heat dissipation efficiency in percentage form allows for intuitive comparison of the heat dissipation performance of different systems or the same system under different working conditions. This quantitative evaluation method greatly improves the objectivity and specificity of system performance analysis.

[0100] The method for obtaining the cooling cycle performance of the radiator at low temperature speed and high temperature speed is:

[0101] Determine the ratio of the energy consumed by the radiator to its heat dissipation effect to obtain the energy efficiency ratio;

[0102] Determine the cooling efficiency of the radiator at low speed and high speed to obtain the temperature reduction capacity;

[0103] Set the weights of energy efficiency ratio and temperature reduction capability, and score based on the set weights to obtain the cooling cycle performance scores of the radiator at low and high speeds. The higher the score, the stronger the cooling cycle performance.

[0104] This method uses energy efficiency ratio and temperature reduction capability as key evaluation indicators, and comprehensively and deeply considers the performance of the radiator at low and high speeds. The energy efficiency ratio, as a quantitative indicator of the energy consumption efficiency of the radiator, directly reflects its energy utilization efficiency; while the temperature reduction capability accurately measures the contribution of the radiator to the cooling effect.

[0105] The corresponding weights are set according to the energy efficiency ratio and temperature reduction capability to achieve an accurate evaluation of the cooling cycle performance of the radiator under different conditions. This quantitative analysis process not only provides engineers and designers with an objective and fair scoring mechanism, but also helps them understand and compare the actual performance of various radiators more intuitively and comprehensively.

[0106] This embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the interaction method of the active interactive hotel AI robot as described above are implemented.

[0107] This embodiment also provides a computer storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the interaction method of the active interactive hotel AI robot as described above are implemented.

[0108] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0109] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above.

[0110] The above embodiments of the present invention are not intended to limit the protection scope of the present invention, and the implementation modes of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structures of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, should fall within the protection scope of the present invention.

Claims

1. A test method for verifying the hot and cold cycle performance of an engine radiator, characterized in that: The following steps are involved: Clean the engine radiator, install it on the test bench, and connect the fluid circulation system and monitoring equipment; Set the coolant temperature circulation range to -40℃-120℃, and use temperature control equipment to circulate the coolant within the set range; Preheat the engine and set the low temperature and high temperature speeds of the engine; Send coolant into the radiator to start the hot and cold cycle; Record the performance parameters of the radiator at low and high speeds, including coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate; Calculate the cooling cycle performance of the radiator based on the performance parameters of the radiator at low speed and high speed; The method for calculating the cooling cycle performance of the radiator based on the performance parameters of the radiator at low speed and high speed is: Calculate the actual heat dissipation of the radiator; Calculate the theoretical heat dissipation required for the engine; Compare the actual heat dissipation with the theoretical required heat dissipation to determine the heat dissipation efficiency; Repeat the above calculations at low temperature speed and high temperature speed; By comparing the heat dissipation efficiency and heat dissipation under different conditions, the cooling cycle performance of the radiator at low speed and high speed is obtained; The method to calculate the actual heat dissipation of the radiator is: Use the following formula to calculate the heat dissipation Q of the heat sink: Q=\dot{m}\cdotc_p\cdot(T_{out}-T_{in}) Where: \dot{m} is the mass flow rate of the coolant kg / s, c_p is the specific heat capacity of the coolant J / kg·K, T_{out} and T_{in} are the outlet and inlet temperatures of the coolant K respectively; The method to calculate the theoretical heat dissipation required by the radiator is: Use the following formula to calculate the theoretical required heat dissipation Q_{required} of the heat sink: Q_{required}=P_{input}-P_{output} Where Q_{required} is the amount of heat that needs to be removed by the heat sink, P_{input} is the total input power of the device, and P_{output} is the actual mechanical output power of the device; The method to determine the heat dissipation efficiency \eta by comparing the actual heat dissipation with the theoretically required heat dissipation is: \eta=\left(\frac{Q_{actual}}{Q_{required}}\right)\times 100% Where Q_{actual} is the actual heat dissipation calculated by the above formula, Q_{required} is the heat required to be removed when the engine is running; The method for obtaining the cooling cycle performance of the radiator at low temperature speed and high temperature speed is: Determine the ratio of the energy consumed by the radiator to its heat dissipation effect to obtain the energy efficiency ratio; Determine the cooling efficiency of the radiator at low speed and high speed to obtain the temperature reduction capacity; Set the weights of energy efficiency ratio and temperature reduction capability, and score based on the set weights to obtain the cooling cycle performance scores of the radiator at low and high speeds. The higher the score, the stronger the cooling cycle performance.

2. The test method for verifying the cooling and heating cycle performance of an engine radiator according to claim 1, characterized in that: The method for preheating the engine and setting the low temperature speed and high temperature speed of the engine is as follows: Start the engine and run it at a low temperature speed of 800-1200r / min. After running for 5-10 minutes, the preheating is completed. After the engine is preheated, the engine speed is gradually increased to a high temperature speed ranging from 3000 to 4000 r / min, and the test is performed under the condition of high temperature speed.

3. The test method for verifying the cooling and heating cycle performance of an engine radiator according to claim 2, characterized in that: The method for recording the performance parameters of the radiator at low temperature speed and high temperature speed is: After the engine is started, when the engine is running at low temperature; Record the coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate at this speed, and continue recording until the temperature stabilizes; After the engine is started, when the engine is running at high speed; Record the coolant inlet temperature, coolant outlet temperature, ambient temperature and coolant flow rate at this speed, and continue recording until the temperature stabilizes.

4. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, the test method for verifying the hot and cold cycle performance of the engine radiator as claimed in any one of claims 1 to 3 is implemented.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the test method for verifying the cooling and heating cycle performance of an engine radiator as described in any one of claims 1 to 3 is implemented.

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