Temperature control method, apparatus, and computer-readable storage medium
By acquiring the cooling circuit temperature and adjusting the weight of heat dissipation, the problem of low integration of automotive cooling modules is solved, achieving simultaneous heat dissipation needs of the engine and drive system, and improving the accuracy and robustness of temperature control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG GEELY HLDG GRP CO LTD
- Filing Date
- 2023-11-28
- Publication Date
- 2026-07-24
Smart Images
Figure CN117657102B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle technology, and in particular to a temperature control method, device and computer-readable storage medium. Background Technology
[0002] With the development of automotive technology, the integration of the interior layout of automobiles is becoming increasingly sophisticated. However, due to the different cooling requirements of the engine and drive system, the drive system (such as drive motors, generators, and various controllers) typically requires a lower temperature to ensure its normal operation, while the engine typically needs to maintain a higher temperature to ensure its thermal efficiency.
[0003] Therefore, since it is difficult to simultaneously meet the cooling requirements of both the engine and the drive system, directly integrating the cooling modules for the engine and drive system into one unit may lead to conflicts between engine cooling and drive system cooling. In other words, the integration level of existing automotive cooling modules is relatively low. Summary of the Invention
[0004] The main purpose of this application is to provide a temperature control method that aims to solve the technical problem of low integration level in existing automotive heat dissipation modules.
[0005] To achieve the above objectives, in a first aspect, this application provides a temperature control method applied to an integrated cooling system of a target vehicle, the integrated cooling system including a first cooling circuit of a drive system, a second cooling circuit of an engine, and an integrated cooling device for dissipating heat between the first cooling circuit and the second cooling circuit.
[0006] The temperature control method includes the following steps:
[0007] Obtain the first circuit temperature of the first cooling circuit and the second circuit temperature of the second cooling circuit;
[0008] Based on the temperatures of the first circuit and the second circuit, determine the corresponding first heat dissipation and second heat dissipation.
[0009] Obtain the vehicle operating conditions of the target vehicle;
[0010] Based on the vehicle's operating conditions, the weights of the first heat dissipation and the second heat dissipation are adjusted to determine the corresponding target heat dissipation, which is used to control the operation of the integrated heat dissipation device.
[0011] According to the first aspect, the step of determining the corresponding first heat dissipation and second heat dissipation based on the first circuit temperature and the second circuit temperature includes:
[0012] Based on the temperature of the first circuit, query the first preset mapping table to obtain the first fan output corresponding to the temperature of the first circuit as the first heat dissipation.
[0013] The target operating temperature of the engine is obtained, and based on the second circuit temperature and the target operating temperature, the corresponding second fan output is output as the second heat dissipation based on a preset fuzzy control rule.
[0014] According to the first aspect, or any implementation of the first aspect above, the step of querying a first preset mapping table based on the first circuit temperature to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation includes:
[0015] Obtain the temperature change trend of the first circuit;
[0016] After the temperature change trend is upward, according to the upward temperature range where the first circuit temperature is located, the upward mapping table in the first preset mapping table is queried to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation.
[0017] After the temperature change trend is downward, based on the downward temperature range where the first circuit temperature is located, the downward mapping table in the first preset mapping table is queried to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation.
[0018] According to the first aspect, or any implementation of the first aspect above, the step of adjusting the weights of the first heat dissipation and the second heat dissipation based on the vehicle operating conditions to determine the corresponding target heat dissipation includes:
[0019] Based on the vehicle's operating conditions, determine the weight information of the first cooling circuit and the second cooling circuit;
[0020] The first heat dissipation and the second heat dissipation are weighted according to the weight information to obtain the corresponding target heat dissipation.
[0021] According to the first aspect, or any implementation of the first aspect above, the step of determining the weight information of the first cooling circuit and the second cooling circuit based on the vehicle operating conditions includes:
[0022] After the vehicle is operating in range-extended operating condition, the target temperature range of the first circuit temperature is determined.
[0023] Based on the target temperature range, a second preset mapping table is queried to obtain the first weight of the first cooling circuit and the second weight of the second cooling circuit, and the first weight and the second weight are used as the weight information, wherein the first weight is positively correlated with the temperature of the first circuit.
[0024] According to the first aspect, or any implementation of the first aspect above, the second preset mapping table includes a preset correspondence between target temperature ranges and first and second weights, and each target temperature range includes a hysteresis interval; after the step of querying the second preset mapping table according to the target temperature range to obtain the first weight of the first cooling circuit and the second weight of the second cooling circuit, the method further includes:
[0025] Determine whether the temperature of the first loop is within the hysteresis range;
[0026] If the temperature of the first loop is not within the hysteresis range, then the following step is performed: determine the target temperature range in which the temperature of the first loop is located, so as to update the weight information.
[0027] According to the first aspect, or any implementation of the first aspect above, before the step of determining the target temperature range in which the temperature of the first loop is located, the temperature control method further includes:
[0028] Determine whether the second heat dissipation is greater than the first heat dissipation;
[0029] If the second heat dissipation is greater than the first heat dissipation, then the second heat dissipation is taken as the target heat dissipation.
[0030] If the second heat dissipation is not greater than the first heat dissipation, then proceed to step: determine the target temperature range in which the temperature of the first circuit is located.
[0031] According to the first aspect, or any implementation of the first aspect above, the step of adjusting the weights of the first heat dissipation and the second heat dissipation based on the vehicle operating conditions to determine the corresponding target heat dissipation further includes:
[0032] After the vehicle operates in pure electric mode, the first heat dissipation is taken as the target heat dissipation.
[0033] After the vehicle is in engine operating condition, the second heat dissipation is taken as the target heat dissipation.
[0034] Secondly, this application provides a temperature control device, the temperature control device comprising: a memory and a processor, wherein the memory stores a computer program executable on the processor, the computer program being configured to implement the steps of the temperature control method described above.
[0035] Thirdly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform a temperature control method as described in any one of the first aspects or possible implementations thereof.
[0036] Fourthly, embodiments of this application provide a computer program including instructions for executing the temperature control method in the first aspect and any possible implementation thereof.
[0037] This application proposes a temperature control method, device, and computer-readable storage medium applied to an integrated cooling system of a target vehicle. The integrated cooling system includes a first cooling circuit for a drive system, a second cooling circuit for an engine, and an integrated cooling device for dissipating heat from the first and second cooling circuits. This effectively improves the integration level of the vehicle's cooling module. However, due to the inconsistent cooling requirements of the engine and drive system, the temperature control strategy still needs improvement. This application obtains the first circuit temperature of the first cooling circuit and the second circuit temperature of the second cooling circuit. Then, based on the first and second circuit temperatures, it determines the corresponding first and second heat dissipation amounts to determine the cooling requirements of the drive system and engine. Next, it obtains the vehicle's operating conditions. Since the cooling tendencies of the drive system and engine differ under different vehicle operating conditions, it adjusts the weights of the first and second heat dissipation amounts according to the vehicle operating conditions to determine the corresponding target heat dissipation amount, which is used to control the operation of the integrated cooling device. This allows the target heat dissipation amount to match the vehicle operating conditions, simultaneously meeting the cooling requirements of both the engine and drive system, thereby effectively improving the integration level of the vehicle's cooling module. Attached Figure Description
[0038] Figure 1 This is a flowchart illustrating the first embodiment of the temperature control method of this application;
[0039] Figure 2 This is a schematic diagram of the integrated heat dissipation system involved in the embodiments of this application;
[0040] Figure 3 This is a flowchart illustrating the second embodiment of the temperature control method of this application;
[0041] Figure 4 This is a flowchart illustrating the third embodiment of the temperature control method of this application;
[0042] Figure 5This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application.
[0043] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0045] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.
[0046] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order of objects. For example, "first target object" and "second target object," etc., are used to distinguish different target objects, not to describe a specific order of target objects.
[0047] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0048] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.
[0049] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the temperature control method of this application. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.
[0050] The first embodiment of this application provides a temperature control method applied to an integrated heat dissipation system of a target vehicle. The integrated heat dissipation system includes a first cooling circuit of a drive system, a second cooling circuit of an engine, and an integrated heat dissipation device for dissipating heat between the first cooling circuit and the second cooling circuit.
[0051] The temperature control method includes the following steps:
[0052] Step S100: Obtain the first circuit temperature of the first cooling circuit and the second circuit temperature of the second cooling circuit;
[0053] In this embodiment, it should be noted that the drive system of the target vehicle includes a generator, a drive motor, and a high-voltage auxiliary controller (such as an air pump controller, oil pump controller, DC-DC converter, generator controller, motor controller, etc.) for driving the vehicle. The engine of the target vehicle can be any type of engine, such as a methanol engine, a gasoline engine, or a diesel engine. The integrated heat dissipation device can be an air-cooled device composed of heat sinks and a cooling fan, or it can be a liquid-cooled device or a heat pipe device. The first cooling circuit connects each device in the drive system to the integrated heat dissipation device to cool each device in the drive system through the cooling medium in the first cooling circuit. The second cooling circuit connects the engine to the integrated heat dissipation device to cool the engine through the cooling medium in the second cooling circuit.
[0054] See Figure 2 , Figure 2 This is a schematic diagram of the integrated heat dissipation system involved in the embodiments of this application. Taking a methanol engine as an example, the high-pressure auxiliary controller includes a motor controller, an air pump controller, an oil pump controller, a DC-DC converter, a generator controller, and a high-pressure control module. The first cooling circuit starts from the first heat sink of the integrated heat dissipation device, flows sequentially through the first water pump, the high-pressure auxiliary controller, the generator, and the drive motor, and then returns to the first heat sink. The first water pump is used to pump the cooling medium in the first cooling circuit. The second cooling circuit starts from the second heat sink of the integrated heat dissipation device, flows sequentially through the second water pump, which is connected to the methanol engine to absorb the heat from the methanol engine, and then returns to the second heat sink. The second water pump is used to pump the cooling medium in the second cooling circuit. The cooling fan of the integrated heat dissipation device can simultaneously force air convection on the first and second heat sinks to accelerate the heat dissipation rate.
[0055] In this embodiment, the temperature of the cooling medium in the first cooling circuit can be detected by a temperature sensor as the first circuit temperature, and the temperature of the cooling medium in the second cooling circuit can be detected as the second circuit temperature. Furthermore, since multiple devices are connected in the first cooling circuit, to more accurately identify the heat dissipation requirements of the first cooling circuit, the temperature of each device in the first cooling circuit can be detected to obtain the sampled temperature of each device. Then, the sampled temperature of the device with the highest temperature among all the sampled temperatures is taken as the first circuit temperature of the first cooling circuit. This avoids the situation where the temperature of the cooling medium in the first cooling circuit is low, but some devices in the first cooling circuit are at high temperatures, causing the first heat dissipation based on the first circuit temperature to not accurately represent the heat dissipation requirements of the first cooling circuit. It is understood that since there may be abnormal values in the sampled temperatures of each device during the temperature sampling process, the sampled temperatures of each device need to be filtered to remove the abnormal values and obtain new sampled temperatures for each device. Then, the sampled temperature of the device with the highest temperature among all the sampled temperatures is taken as the first circuit temperature of the first cooling circuit. The filtering process can employ filtering algorithms such as average value filtering, median filtering, and Kalman filtering.
[0056] Step S200: Determine the corresponding first heat dissipation and second heat dissipation based on the first circuit temperature and the second circuit temperature;
[0057] In this embodiment, it should be noted that the first heat dissipation and the second heat dissipation can be described using parameters characterizing the heat dissipation power of the integrated heat dissipation device. Taking the integrated heat dissipation device as an air-cooled device, including a cooling fan, as an example, the first heat dissipation and the second heat dissipation can be described as the fan output (such as fan speed, duty cycle, etc.) of the cooling fan. Taking the integrated heat dissipation device as a liquid-cooled device, the first heat dissipation and the second heat dissipation can be described as the cooling power of the liquid-cooled device.
[0058] As an example, a first correspondence between the first circuit temperature and the heat dissipation can be pre-defined, and this first correspondence can be described in the form of a formula, a mapping table, etc. Similarly, a second correspondence between the second circuit temperature and the heat dissipation can be pre-defined, and this second correspondence can also be described in the form of a formula, a mapping table, etc. Therefore, in this embodiment, the corresponding first and second heat dissipation can be obtained based on the first and second correspondences, according to the first and second circuit temperatures.
[0059] As another example, since the engine of the target vehicle needs to stabilize the second circuit temperature around the engine's target operating temperature, using lookup tables or relational calculations may lead to large fluctuations in the second circuit temperature, affecting the engine's proper operation. Therefore, the target operating temperature of the engine can be obtained. Then, based on the temperature difference between the second circuit temperature and the target operating temperature, and according to a preset fuzzy control rule, the corresponding second fan output is output as the second heat dissipation. Thus, this embodiment uses a preset fuzzy control rule to ensure that the second circuit temperature is maintained relatively accurately near the target operating temperature, guaranteeing the accuracy, real-time performance, and robustness of temperature control.
[0060] The step S200, which involves determining the corresponding first heat dissipation and second heat dissipation based on the first circuit temperature and the second circuit temperature, includes:
[0061] Step S210: Based on the first circuit temperature, query the first preset mapping table to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation.
[0062] Step S220: Obtain the target operating temperature of the engine, and based on the second circuit temperature and the target operating temperature, output the corresponding second fan output as the second heat dissipation based on a preset fuzzy control rule.
[0063] In this embodiment, it should also be noted that the first preset mapping table includes a first correspondence between the first loop temperature and the fan output. The preset fuzzy control rule is the control rule for a fuzzy control process with the temperature difference between the second loop temperature and the target operating temperature, and the rate of change of the temperature difference, as the first input variable and the second input variable, respectively, and the fan output as the control variable.
[0064] In this embodiment, the integrated heat dissipation device is an air-cooled device, including a cooling fan. This embodiment can query a first preset mapping table based on the first loop temperature to obtain the first fan output corresponding to the first loop temperature as the first heat dissipation. Furthermore, the target operating temperature of the engine can be obtained, where the target operating temperature is the second loop temperature under good engine operating conditions, such as 90°C. It is understood that the target operating temperature may differ for different types of engines. Then, based on the second loop temperature and the target operating temperature, the temperature difference between the first loop temperature and the target operating temperature and the rate of change of the temperature difference are calculated. The temperature difference and the rate of change are then input into the preset fuzzy control rule to output the corresponding second fan output as the second heat dissipation. Thus, this embodiment, through the preset fuzzy control rule, ensures that the second loop temperature is maintained relatively accurately near the target operating temperature, guaranteeing the accuracy, real-time performance, and robustness of temperature control.
[0065] Step S300: Obtain the vehicle operating conditions of the target vehicle;
[0066] In this embodiment, it should be noted that the vehicle operating conditions include pure electric operation, engine operation, and range-extended operation. In the pure electric operation condition, the engine is not running, and the target vehicle operates by relying on the power battery to power the drive system. In this case, the first cooling circuit has a heat dissipation requirement, but the second cooling circuit does not. In the engine operation condition, the target vehicle is stationary, and only the engine is running to replenish power. In this case, the first cooling circuit does not generate heat, only the second cooling circuit generates heat; that is, the first cooling circuit has no heat dissipation requirement, but the second cooling circuit does. In the range-extended operation condition, both the engine and the drive system are running. In this case, both the first and second cooling circuits generate heat, and both have a heat dissipation requirement.
[0067] Step S400: Based on the vehicle operating conditions, adjust the weights of the first heat dissipation and the second heat dissipation to determine the corresponding target heat dissipation, which is used to control the operation of the integrated heat dissipation device.
[0068] As an example, when the vehicle is operating in pure electric mode or engine mode, since only the first cooling circuit or the second cooling circuit has a heat dissipation requirement, the weight of the maximum value of the first heat dissipation and the second heat dissipation can be adjusted to 1, that is, the maximum value of the first heat dissipation and the second heat dissipation can be used as the target heat dissipation to control the operation of the integrated heat dissipation device.
[0069] As another example, when the vehicle is operating in range-extended mode, both the first and second cooling circuits have heat dissipation requirements. However, the drive system needs to maintain a low temperature, while the engine needs to maintain a relatively high temperature. Therefore, the weights of the first and second heat dissipation amounts can be adjusted based on the temperature of the first cooling circuit; the higher the temperature of the first circuit, the greater the weight of the first heat dissipation amount. Thus, when the temperature of the first circuit is low, the second heat dissipation amount takes precedence to prevent the engine from cooling down and affecting its normal operation. When the temperature of the first circuit is high, the first heat dissipation amount takes precedence to prevent overheating of the components in the drive system and affecting their normal operation. This ensures that the target heat dissipation amount meets the heat dissipation requirements of maintaining a high engine temperature while matching the heat dissipation requirements of the drive system to maintain a low temperature.
[0070] The step S400, which involves adjusting the weights of the first and second heat dissipation quantities based on the vehicle's operating conditions to determine the corresponding target heat dissipation quantity, includes:
[0071] Step S410: Determine the weight information of the first cooling circuit and the second cooling circuit based on the vehicle operating conditions;
[0072] Step S420: The first heat dissipation and the second heat dissipation are weighted and calculated according to the weight information to obtain the corresponding target heat dissipation.
[0073] In this embodiment, the weight information includes a first weight of the first heat dissipation and a second weight of the second heat dissipation.
[0074] As an example, when the vehicle is operating in either pure electric mode or engine mode, since only the first or second cooling circuit has a heat dissipation requirement, the weight of the maximum value between the first and second heat dissipation amounts can be configured as 1, while the weight of the minimum value can be configured as 0. Then, the first and second heat dissipation amounts are weighted and calculated according to the weight information to obtain the corresponding target heat dissipation amount. That is, when the vehicle is operating in either pure electric mode or engine mode, the maximum value between the first and second heat dissipation amounts is taken as the target heat dissipation amount.
[0075] As another example, when the vehicle is operating in range-extended mode, both the first and second cooling circuits have heat dissipation requirements. However, the drive system needs to maintain a low temperature, while the engine needs to maintain a relatively high temperature. Therefore, the weights of the first and second heat dissipation amounts can be adjusted based on the first circuit temperature of the first cooling circuit. The higher the first circuit temperature, the greater the first weight of the first heat dissipation amount, and the smaller the second weight. Thus, when the first circuit temperature is low, the second heat dissipation amount takes precedence to prevent the engine from cooling down and affecting its normal operation. When the first circuit temperature is high, the first heat dissipation amount takes precedence to prevent overheating of the various components in the drive system and affecting their normal operation. Furthermore, the first and second heat dissipation amounts are weighted and calculated according to the first and second weights to obtain the corresponding target heat dissipation amount. This ensures that the target heat dissipation amount meets the heat dissipation requirements of maintaining a high engine temperature while matching the heat dissipation requirements of the drive system to maintain a low temperature.
[0076] The step S400, which involves adjusting the weights of the first and second heat dissipation quantities based on the vehicle's operating conditions to determine the corresponding target heat dissipation quantity, further includes:
[0077] Step A10: After the vehicle is in pure electric operation mode, the first heat dissipation is taken as the target heat dissipation.
[0078] Step A20: After the vehicle is in engine operating condition, the second heat dissipation is taken as the target heat dissipation.
[0079] Since the pure electric operating condition involves the engine not starting and the target vehicle relying on the power battery to power its drive system, the first cooling circuit has a heat dissipation requirement, but the second cooling circuit does not. Therefore, the target heat dissipation amount and the temperature of the second cooling circuit are decoupled. Thus, in this embodiment, the system determines whether the vehicle is operating in a pure electric condition. If it is, the first heat dissipation amount is used as the target heat dissipation amount. If it is not, the first heat dissipation amount is not used as the target heat dissipation amount.
[0080] Since the engine operating condition is that the target vehicle is stationary and only the engine is running to replenish electricity, the first cooling circuit does not generate heat, while only the second cooling circuit generates heat. That is, the first cooling circuit has no heat dissipation requirement, but the second cooling circuit does. Therefore, the target heat dissipation is decoupled from the temperature of the first circuit of the first cooling circuit. This embodiment can determine whether the vehicle is operating under engine conditions; if it is, the second heat dissipation is used as the target heat dissipation. If it is not, the second heat dissipation is not used. This allows for rapid determination of the corresponding target heat dissipation when the vehicle is operating under pure electric or engine conditions.
[0081] In the first embodiment of this application, an integrated cooling system applied to a target vehicle is used. This integrated cooling system includes a first cooling circuit for the drive system, a second cooling circuit for the engine, and an integrated cooling device for dissipating heat from both the first and second cooling circuits. This effectively improves the integration level of the vehicle's cooling module. However, due to the inconsistent cooling requirements of the engine and drive system, the temperature control strategy still needs improvement. This embodiment obtains the first circuit temperature of the first cooling circuit and the second circuit temperature of the second cooling circuit. Then, based on these temperatures, a first heat dissipation amount and a second heat dissipation amount are determined to determine the cooling requirements of the drive system and the engine. Next, the vehicle's operating conditions are obtained. Since the cooling tendencies of the drive system and engine differ under different operating conditions, the weights of the first and second heat dissipation amounts are adjusted according to the vehicle's operating conditions to determine a corresponding target heat dissipation amount, which is used to control the operation of the integrated cooling device. This allows the target heat dissipation amount to match the vehicle's operating conditions, simultaneously meeting the cooling requirements of both the engine and the drive system, thereby effectively improving the integration level of the vehicle's cooling module.
[0082] Reference Figure 3 , Figure 3 This is a flowchart illustrating the second embodiment of the temperature control method of this application.
[0083] In another embodiment of this application, content that is the same as or similar to the above embodiment can be referred to the above description, and will not be repeated hereafter. A second embodiment of this application provides a temperature control method. Step S210, which involves querying a first preset mapping table based on the first loop temperature to obtain the first fan output corresponding to the first loop temperature as the first heat dissipation, includes:
[0084] Step S211: Obtain the temperature change trend of the first circuit temperature;
[0085] Step S212: After the temperature change trend is upward, according to the upward temperature range where the first circuit temperature is located, query the upward mapping table in the first preset mapping table to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation.
[0086] Step S213: After the temperature change trend is a downward trend, according to the downward temperature range in which the first circuit temperature is located, query the downward mapping table in the first preset mapping table to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation.
[0087] In this embodiment, it should be noted that the first preset mapping table includes an uplink mapping table and a downlink mapping table. The uplink mapping table includes the correspondence between uplink temperature ranges and fan output; the downlink mapping table includes the correspondence between downlink temperature ranges and fan output.
[0088] For example, the first preset mapping table is shown in Table 1 below:
[0089] Table 1 First Preset Mapping Table
[0090] T1＜55℃ 0％ T1＜50℃ 0％ T1∈[55,60] 50％ T1∈[50,55] 50％ T1∈(60,65] 65％ T1∈(55,60] 65％ T1＞65℃ 85％ T1＞60℃ 85％
[0091] This embodiment determines whether the first circuit temperature is currently rising or falling by acquiring the temperature change trend of the first circuit temperature. When the temperature change trend is rising, the first fan output corresponding to the first circuit temperature is obtained by querying the upward mapping table in the first preset mapping table, based on the upward temperature range of the first circuit temperature. This first fan output is used as the first heat dissipation. As shown in Table 1 above, when the temperature change trend is rising, if the first circuit temperature T1 is less than 55°C, the fan output of the integrated heat dissipation device is controlled to run at 0%; if the first circuit temperature T1 is between 55°C and 60°C, the fan output is controlled to run at 50%; if the first circuit temperature T1 is between 60°C and 65°C, the fan output is controlled to run at 65%; and if the first circuit temperature T1 is greater than 65°C, the fan output is controlled to run at 85%. When the temperature change trend is falling, the first fan output corresponding to the first circuit temperature is obtained by querying the downward mapping table in the first preset mapping table, based on the downward temperature range of the first circuit temperature. This first fan output is used as the first heat dissipation. As shown in Table 1 above, after the temperature change trend becomes a downward trend, when the first loop temperature T1 is less than 50°C, the fan output of the integrated heat dissipation device is controlled to operate at 0%; when the first loop temperature T1 is between 50°C and 55°C, the fan output of the integrated heat dissipation device is controlled to operate at 50%; when the first loop temperature T1 is between 55°C and 60°C, the fan output of the integrated heat dissipation device is controlled to operate at 65%; and when the first loop temperature T1 is greater than 60°C, the fan output of the integrated heat dissipation device is controlled to operate at 85%.
[0092] In the second embodiment of this application, the first preset mapping table includes an upward mapping table and a downward mapping table. By acquiring the temperature change trend of the first circuit temperature; when the temperature change trend is upward, based on the upward temperature range of the first circuit temperature, the upward mapping table in the first preset mapping table is consulted to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation; when the temperature change trend is downward, based on the downward temperature range of the first circuit temperature, the downward mapping table in the first preset mapping table is consulted to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation. This allows the first heat dissipation to match the temperature change trend of the first circuit temperature, thus making the representation of the heat dissipation demand of the first cooling circuit more accurate.
[0093] Reference Figure 4 , Figure 4 This is a flowchart illustrating the third embodiment of the temperature control method of this application.
[0094] In another embodiment of this application, content that is the same as or similar to the above embodiments can be referred to the above description, and will not be repeated hereafter. A third embodiment of this application provides a temperature control method, wherein step S410, which involves determining the weight information of the first cooling circuit and the second cooling circuit based on the vehicle's operating conditions, includes:
[0095] Step S411: After the vehicle is in range-extended operation mode, determine the target temperature range of the first circuit temperature.
[0096] Step S412: Based on the target temperature range, query the second preset mapping table to obtain the first weight of the first cooling circuit and the second weight of the second cooling circuit, and use the first weight and the second weight as the weight information, wherein the first weight is positively correlated with the temperature of the first circuit.
[0097] In this embodiment, it should be noted that the second preset mapping table includes the correspondence between the target temperature range and the first weight and the second weight. The first weight is positively correlated with the temperature of the first loop, and the second weight is negatively correlated with the temperature of the first loop.
[0098] For example, the second preset mapping table is shown in Table 2 below:
[0099] Table 2 Second Preset Mapping Table
[0100] T1＜55℃ 0 1 T1∈[55,60] 1 / 2 1 / 2 T1∈(60,65] 2 / 3 1 / 3 T1＞65℃ 1 0
[0101] To avoid excessive heat dissipation from the first cooling circuit, which could cause the engine in the second cooling circuit to cool down, this embodiment determines the target temperature range of the first cooling circuit after the vehicle is operating in range-extended mode. Then, based on the target temperature range, a second preset mapping table is consulted to obtain the first weight of the first cooling circuit and the second weight of the second cooling circuit, and these weights are used as the weight information. Therefore, the first and second heat dissipation amounts are weighted and calculated based on the first and second weights to obtain the corresponding target heat dissipation amount. Thus, when the first circuit temperature is low, the second heat dissipation amount is prioritized to prevent the engine from cooling down and affecting its normal operation. When the first circuit temperature is high, the first heat dissipation amount is prioritized to prevent overheating of the various components in the drive system and affecting their normal operation. This embodiment adjusts the first and second weights according to the positive correlation between the first weight and the first circuit temperature, so that the target heat dissipation amount obtained by weighted calculation meets the heat dissipation requirements of maintaining a high engine temperature while matching the heat dissipation requirements of the drive system, which requires its own temperature to be as low as possible.
[0102] The second preset mapping table includes a preset correspondence between target temperature ranges and first and second weights, and each target temperature range includes a hysteresis interval.
[0103] After step S412, which involves querying a second preset mapping table based on the target temperature range to obtain the first weight of the first cooling circuit and the second weight of the second cooling circuit, the method further includes:
[0104] Step S430: Determine whether the temperature of the first loop is within the hysteresis range;
[0105] Step S431: If the temperature of the first loop is not within the hysteresis range, then perform the step: determine the target temperature range in which the temperature of the first loop is located, so as to update the weight information.
[0106] In this embodiment, it should be noted that the second preset mapping table includes a preset correspondence between target temperature ranges and a first weight and a second weight, and each target temperature range includes a hysteresis interval. The hysteresis interval is a temperature range that includes the endpoint values between adjacent target temperature ranges. For example, the target temperature ranges on both sides of the hysteresis interval are [55, 60) and [60, 65), and the hysteresis interval can be [58, 62], and the hysteresis interval includes the endpoint value 60.
[0107] After obtaining the first weight of the first cooling circuit and the second weight of the second cooling circuit in this embodiment, the temperature of the first circuit can be monitored in real time to determine whether the temperature of the first circuit is within the hysteresis interval. If the temperature of the first circuit is not within the hysteresis interval, it indicates that the temperature of the first circuit is fluctuating significantly, and the step of determining the target temperature range of the first circuit temperature can be executed to update the weight information. If the temperature of the first circuit is within the hysteresis interval, it indicates that the temperature of the first circuit is fluctuating slightly, and the weight information does not need to be updated. This avoids frequent updates of the weight information when the temperature of the first circuit fluctuates near the endpoints of adjacent target temperature ranges, which could affect the normal operation of the integrated heat dissipation device.
[0108] Prior to the step of determining the target temperature range of the first loop temperature in step S411, the temperature control method further includes:
[0109] Step B10: Determine whether the second heat dissipation is greater than the first heat dissipation;
[0110] Step B20: If the second heat dissipation is greater than the first heat dissipation, then the second heat dissipation is taken as the target heat dissipation.
[0111] Step B30: If the second heat dissipation is not greater than the first heat dissipation, then proceed to step: determine the target temperature range of the first circuit temperature.
[0112] When the vehicle is operating in range-extended mode, both the first and second cooling circuits have heat dissipation requirements. However, the drive system needs to maintain a lower temperature, while the engine needs to maintain a higher temperature. Therefore, it can be determined whether the second heat dissipation is greater than the first heat dissipation to determine whether the first or second cooling circuit has a higher heat dissipation requirement. If the second heat dissipation is greater than the first, it indicates that the second cooling circuit has a higher heat dissipation requirement. Since the drive system requires a higher heat dissipation, the second heat dissipation can be used as the target heat dissipation to adequately meet the heat dissipation requirements of the second cooling circuit and exceed the heat dissipation requirements of the first cooling circuit. If the second heat dissipation is not greater than the first, since the engine needs to maintain a higher temperature, it is obviously necessary to avoid excessively exceeding the heat dissipation requirements of the second cooling circuit. Therefore, the step is to determine the target temperature range of the first circuit. Thus, when the temperature of the first circuit is low, the second heat dissipation takes precedence to prevent the engine from cooling down and affecting its normal operation. When the temperature of the first circuit is high, the first heat dissipation is the primary factor to avoid overheating of the devices in the drive system and affecting their normal operation.
[0113] In the third embodiment of this application, after the vehicle operates in range-extended mode, a target temperature range for the first circuit temperature is determined. Based on the target temperature range, a second preset mapping table is consulted to obtain a first weight for the first cooling circuit and a second weight for the second cooling circuit. The first weight and the second weight are then used as the weight information, wherein the first weight is positively correlated with the first circuit temperature. This embodiment adjusts the first weight and the second weight according to the positive correlation between the first weight and the first circuit temperature, thereby ensuring that the weighted target heat dissipation meets the engine's need to maintain a high temperature while simultaneously matching the drive system's need for lower temperatures.
[0114] like Figure 5 As shown, Figure 5 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application.
[0115] Specifically, the temperature control device may be a VCU (vehicle control unit), PC (personal computer), tablet computer, portable computer, or server, etc.
[0116] like Figure 5 As shown, the temperature control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.
[0117] Those skilled in the art will understand that Figure 5The device structure shown does not constitute a limitation on the temperature control device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.
[0118] like Figure 5 As shown, the memory 1005, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a temperature control application.
[0119] exist Figure 5 In the device shown, the network interface 1004 is mainly used to connect to the backend server and communicate data with the backend server; the user interface 1003 is mainly used to connect to the client and communicate data with the client; and the processor 1001 can be used to call the temperature control program stored in the memory 1005 to implement the operation in the temperature control method provided in the above embodiment.
[0120] Furthermore, this application also proposes a computer storage medium storing a computer program. When the computer program is executed by a processor, it implements the operations in the temperature control method provided in the above embodiments. The specific steps will not be described in detail here.
[0121] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity / operation / object from another, and do not necessarily require or imply any such actual relationship or order between these entities / operations / objects; the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.
[0122] For the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and relevant details can be found in the description of the method embodiments. The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate. Some or all of the modules can be selected according to actual needs to achieve the purpose of this application. Those skilled in the art can understand and implement this without creative effort.
[0123] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0124] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.
[0125] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A temperature control method, characterized in that, An integrated cooling system for a target vehicle, the integrated cooling system comprising a first cooling circuit of a drive system, a second cooling circuit of an engine, and an integrated cooling device for dissipating heat between the first cooling circuit and the second cooling circuit; The temperature control method includes the following steps: Obtain the first circuit temperature of the first cooling circuit and the second circuit temperature of the second cooling circuit; Obtain the temperature change trend of the first circuit; After the temperature change trend is upward, according to the upward temperature range where the first circuit temperature is located, the upward mapping table in the first preset mapping table is queried to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation. After the temperature change trend is downward, according to the downward temperature range where the first circuit temperature is located, the downward mapping table in the first preset mapping table is queried to obtain the first fan output corresponding to the first circuit temperature as the first heat dissipation. Determine the corresponding second heat dissipation amount based on the temperature of the second circuit; Obtain the vehicle operating conditions of the target vehicle; Based on the vehicle's operating conditions, the weights of the first heat dissipation and the second heat dissipation are adjusted to determine the corresponding target heat dissipation, which is used to control the operation of the integrated heat dissipation device.
2. The temperature control method as described in claim 1, characterized in that, The step of determining the corresponding second heat dissipation amount based on the second circuit temperature includes: The target operating temperature of the engine is obtained, and based on the second circuit temperature and the target operating temperature, the corresponding second fan output is output as the second heat dissipation based on a preset fuzzy control rule.
3. The temperature control method as described in claim 1, characterized in that, The step of adjusting the weights of the first heat dissipation and the second heat dissipation based on the vehicle's operating conditions to determine the corresponding target heat dissipation includes: Based on the vehicle's operating conditions, determine the weight information of the first cooling circuit and the second cooling circuit; The first heat dissipation and the second heat dissipation are weighted according to the weight information to obtain the corresponding target heat dissipation.
4. The temperature control method as described in claim 3, characterized in that, The step of determining the weight information of the first cooling circuit and the second cooling circuit based on the vehicle operating conditions includes: After the vehicle is operating in range-extended operating condition, the target temperature range of the first circuit temperature is determined. Based on the target temperature range, a second preset mapping table is queried to obtain the first weight of the first cooling circuit and the second weight of the second cooling circuit, and the first weight and the second weight are used as the weight information, wherein the first weight is positively correlated with the temperature of the first circuit.
5. The temperature control method as described in claim 4, characterized in that, The second preset mapping table includes a preset correspondence between target temperature ranges and first and second weights, and each target temperature range includes a hysteresis interval. After the step of querying a second preset mapping table based on the target temperature range to obtain the first weight of the first cooling circuit and the second weight of the second cooling circuit, the method further includes: Determine whether the temperature of the first loop is within the hysteresis range; If the temperature of the first loop is not within the hysteresis range, then the following step is performed: determine the target temperature range in which the temperature of the first loop is located, so as to update the weight information.
6. The temperature control method as described in claim 4, characterized in that, Before the step of determining the target temperature range of the first loop temperature, the temperature control method further includes: Determine whether the second heat dissipation is greater than the first heat dissipation; If the second heat dissipation is greater than the first heat dissipation, then the second heat dissipation is taken as the target heat dissipation. If the second heat dissipation is not greater than the first heat dissipation, then proceed to step: determine the target temperature range in which the temperature of the first circuit is located.
7. The temperature control method according to any one of claims 1 to 6, characterized in that, The step of adjusting the weights of the first heat dissipation and the second heat dissipation according to the vehicle operating conditions to determine the corresponding target heat dissipation further includes: After the vehicle operates in pure electric mode, the first heat dissipation is taken as the target heat dissipation. After the vehicle is in engine operating condition, the second heat dissipation is taken as the target heat dissipation.
8. A temperature control device, characterized in that, The temperature control device includes: a memory and a processor, wherein the memory stores a computer program that can run on the processor, and the computer program, when executed by the processor, implements the steps of the temperature control method as described in any one of claims 1 to 7.
9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a temperature control program, which, when executed by a processor, implements the steps of the temperature control method as described in any one of claims 1 to 7.