Intelligent control method for vehicle thermal management

Abstract

The invention relates to the technical field of electric temperature control, in particular to a vehicle thermal management intelligent control method, which comprises the following steps: extracting temperature key points and sorting, marking a heat source response time difference, calculating a temperature rise difference value, analyzing delay offset, judging temperature difference fluctuation and sorting a path, calling a compensation action and judging a condition. And finally generating a vehicle thermal management control instruction. According to the invention, by extracting temperature key points and constructing a path response sorting mechanism, accurate identification of a heat source activation precedence relation is realized, abnormal paths are screened in combination with temperature rise difference values, time migration in a control period is identified by using response delay characteristics of each actuator, and an action triggering priority is determined by superposing a temperature difference rate fluctuation trend. According to the method, the agility of path identification, the coordination of control response and the adaptability under the multi-heat-source working condition are improved, and the accuracy of heat management control in the complex environment and the stability of system execution are effectively enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric temperature control, in particular to a vehicle thermal management intelligent control method. BACKGROUND

[0002] The technical field of electric temperature control involves the technology system of sensing, adjusting and controlling the temperature of the environment or equipment, mainly including temperature detection sensors, actuators, electronic control units, cooling and heating systems, signal transmission lines and other core technical matters. This technical field monitors the temperature state in real time through electronic circuits and control algorithms, and outputs control instructions according to preset logic, and is widely used in industrial automation, household appliances, automotive systems and intelligent devices, and is an important part of realizing system energy efficiency management and stable operation. Among them, the traditional vehicle thermal management intelligent control method refers to a control method that collects data parameters such as cooling liquid temperature, engine load and environmental temperature, and controls the radiator fan, water pump and air conditioner compressor based on a preset thermal management strategy. This kind of method usually uses the temperature regulation logic and finite state machine model embedded in the vehicle controller to make decisions, and realizes distributed management of the thermal state of each component of the power system.

[0003] The prior art mainly relies on the internal rules of the controller to integrate and judge the cooling liquid temperature, load and environmental temperature, and does not refine and disassemble the temperature behavior change of the cooling path under the action of different heat sources, lacks dynamic recognition ability of the path response timing, and in the period of response overlap of multiple actuators, it is easy to cause mismatch of path switching and action triggering, when there is heat load transfer crossing between paths and lack of avoidance judgment, it may cause response order confusion and heat dissipation lag, for example, if the circulation pump action delay and the thermostat lag are not distinguished, it will cause local response delay of the cooling system, temperature control interval fluctuation intensifies, and affects the stability of system thermal balance regulation and control. SUMMARY

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme, a vehicle thermal management intelligent control method, comprising the following steps: S1: Extracting the temperature rising starting point, peak value and falling point in the cooling liquid circuit, sorting by path number, comparing the time interval of the three points under the action of the heat source, marking the time difference between the heat source activation and the temperature change, and generating an activation sequence chart; S2: According to the activation sequence chart, extracting the temperature change point of the path when the heat sources are activated at the same time, calculating the temperature rise starting difference of combination and single activation, judging whether it exceeds the response difference standard, and generating a path avoidance control table; S3: Reading the path avoidance control table, obtaining the circulation pump switching delay, thermostat lag and fan start-up delay, judging whether there is deviation in the same period, and generating a timing compensation control list; S4: Based on the timing compensation control list, analyze the temperature difference trend of the heat exchanger channel, extract the initial speed, determine whether it exceeds the thermal sensitivity range, sort the path number and control sequence, and output the actuator response level table. S5: Based on the actuator response level table, call the corresponding compensation action and path index item, determine whether the start conditions are met at the same time, bind the path and actuator number, set it as the cycle start action, and generate vehicle thermal management intelligent control operation instructions.

[0005] As a further embodiment of the present invention, the activation sequence chart includes the temperature rise start time point, peak occurrence time point, fall stabilization time point, path time sorting record, and heat source response time difference marker; the path avoidance control table includes response difference threshold judgment, path number exceeding the difference limit, and comparison results of combined activation and single activation; the timing compensation control list includes the circulation pump response delay time point, electronic thermostat opening and closing lag time point, cooling fan inverter start delay position, and compensation start command marker; the actuator response level table includes the path temperature difference change rate, rate fluctuation judgment result, control action sequence combination, and start command level number; and the vehicle thermal management intelligent control operation command includes the combined control number, path and actuator binding relationship, and initial trigger action setting.

[0006] As a further aspect of the present invention, the response difference standard refers to the deviation threshold between the combined activation and the single activation path in the temperature rise start time.

[0007] As a further aspect of the present invention, the thermal sensitivity range refers to the allowable variation range of the rate of temperature difference change in the initial section of the heat exchanger channel within a set time. If the range is exceeded, path and control compensation is required.

[0008] As a further aspect of the present invention, the specific steps of S1 are as follows: S101: Obtain the activation time and temperature sequence of the heat source number and path number in the coolant circuit, identify the response start point based on the initial temperature difference exceeding the starting threshold, find the maximum value position as the peak point, and the position where the temperature falls back to the fluctuation range as the stable point, and generate a set of temperature response time feature points. S102: Call the temperature response time feature point set, sort the three time points in each heat source and path number combination, calculate the interval time from the start to the peak and from the peak to the stable point, and generate a temperature response time interval sequence. S103: Call the temperature response time interval sequence and activation time data, calculate the time difference between the response start point and the activation time, sort them, mark the sorting results as sequence numbers, and generate an activation sequence chart.

[0009] As a further aspect of the present invention, the specific steps of S2 are as follows: S201: Call the activation sequence chart to obtain the path temperature sequence of the heat source in the combined activation state, and extract the temperature rise start time point of the path on the time axis. At the same time, obtain the temperature rise start time point of the same heat source in the individual activation state. Align the two sets of start time points according to the path number and perform difference calculation to generate a combined single activation start difference set. S202: Call the combined single activation initial difference set, compare the difference range with the preset response difference identification standard value, and when the absolute value of the difference exceeds the response difference identification standard value, extract the corresponding path number and mark it as the path number to be avoided, and generate a list of path numbers that exceed the difference. S203: Based on the list of out-of-tolerance path numbers, extract the corresponding heat source and path number combination information from the activation sequence chart, establish avoidance index conditions according to the path number, record the response sorting, activation difference and path-related control delay parameters of the corresponding path, including circulation pump switching delay, thermostat hysteresis and fan start delay, and generate a path avoidance control table.

[0010] As a further aspect of the present invention, the specific steps of S3 are as follows: S301: Read the path avoidance control table, collect the coolant circulation pump switching delay time, electronic thermostat opening and closing lag time, and cooling fan start delay time for the corresponding path, aggregate the three types of time points, and generate a path control action delay time point set. S302: Call the path control action delay time point set, calculate the time difference between the three types of time points within the unified control cycle, and determine whether there is an offset exceeding the time overlap threshold, and obtain a list of time point overlap offset path numbers. S303: Based on the list of overlapping offset path numbers at the time points, extract the corresponding path numbers and construct a compensation action instruction index. Combine the compensation items with the delay parameters to generate a timing compensation control list.

[0011] As a further aspect of the present invention, the specific steps of S4 are as follows: S401: Read the timing compensation control list, monitor the temperature difference data sequence of the coolant in the main branch channel of the heat exchanger within the path, extract the temperature difference change interval of the initial activation segment, calculate the derivative sequence of the temperature difference with respect to time within the interval, and generate a set of temperature difference change rate curves. S402: Call the set of temperature difference change rate curves, compare the fluctuation amplitude of each curve in the initial activation stage with the preset thermosensitive judgment range value, determine whether there is a path number that exceeds the range, and generate a thermosensitive fluctuation path number table. S403: Based on the thermal fluctuation path number table and the action instruction index in the timing compensation control list, extract the action execution order corresponding to each path and sort them together. Map the path number and sorting order to hierarchical items to generate an actuator response level table.

[0012] As a further aspect of the present invention, the specific steps of S5 are as follows: S501: Read the first and second digits of the start instruction level in the actuator response level table, call the compensation action content in the timing compensation control list with the corresponding number, extract the activation trigger status label, call the path index item with the number in the path avoidance control table, determine whether both are in the start state, and generate a dual start number set. S502: Call the dual-startup number set, pair each path number with the executor number, establish a two-way binding relationship between the path number and the corresponding executor number, construct a combined structure instruction item, and generate a path executor binding instruction set; S503: Based on the path actuator binding instruction set, select the combination item that is the first trigger condition in the current cycle, mark it as the starting action, assign the combination instruction the trigger priority in the current control cycle, and generate vehicle thermal management intelligent control operation instructions.

[0013] As a further aspect of the present invention, the activation condition refers to the judgment criteria triggered when the path temperature rise trend meets the activation sequence requirements and the controller is in an operable state.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In this invention, by extracting key temperature points and constructing a path response sorting mechanism, the precise identification of the activation sequence of heat sources is achieved. Abnormal paths are screened by combining temperature rise differences, and the time offset within the control cycle is identified by utilizing the response delay characteristics of each actuator. The action triggering priority is determined by superimposing the temperature difference rate fluctuation trend, and finally, the precise matching of the path and control command is completed. This method improves the agility of path identification, the coordination of control response, and the adaptability under multiple heat source conditions, effectively enhancing the accuracy of thermal management control and the stability of system execution in complex environments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the steps of the present invention; Figure 2 This is a detailed schematic diagram of S1 of the present invention; Figure 3 This is a detailed schematic diagram of S2 of the present invention; Figure 4 This is a detailed schematic diagram of S3 of the present invention; Figure 5 This is a detailed schematic diagram of S4 of the present invention; Figure 6 This is a detailed schematic diagram of S5 of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0018] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0019] In the embodiments of this invention, the terms "image" and "picture" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning.

[0020] In this embodiment of the invention, sometimes a subscript such as W1 may be written in a non-subscript form such as W1. When the difference is not emphasized, the meaning they express is the same.

[0021] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] Please see Figure 1 This invention provides a vehicle thermal management intelligent control method, comprising the following steps: S1: Obtain the starting point of the temperature response position in the vehicle coolant circuit, the point where the temperature peak occurs, and the point where the temperature falls back to a stable state under the differentiated heat source activation state. Sort the temperature response points of each group according to the path number, compare the time interval of the three points in each path under the heat source number, mark the order according to the time difference between the heat source activation time and the temperature change time, screen out the path thermal response change start position, write the sorting record of the combination of heat source number and path number, and generate an activation sequence chart. S2: Call the path sorting recorded in the activation sequence chart, extract the temperature change time points of the corresponding paths when the heat source is in the active state at the same time, calculate the difference between the temperature rise start point at the same node of the combined activation and single activation paths, compare whether the difference exceeds the response difference identification standard value, screen out the path numbers marked as exceeding the difference, record the number as the path index item to be avoided, and generate the path avoidance control table. S3: Read the path index item in the path avoidance control table, obtain the trigger delay time of the coolant circulation pump switching response in the corresponding path, obtain the start delay time of the electronic thermostat opening and closing action, obtain the response start delay position during the start of the cooling fan frequency converter, determine whether there is time overlap offset of the three time points in the same control cycle, mark the path number that meets the offset condition as the compensation start action instruction, and generate the timing compensation control list. S4: Read the compensation start action command in the timing compensation control list, detect the cooling liquid temperature difference change trend in the main branch channel of the heat exchanger in the path, extract the change rate curve of the temperature difference curve in the initial stage of activation, determine whether the fluctuation of the rate curve exceeds the thermal judgment range value, combine and sort the path number and control action sequence to form the start command level of the action to be executed in the current cycle, and generate the actuator response level table. S5: Read the first digit of the start command level in the actuator response level table, call the compensation action in the timing compensation control list corresponding to the number, call the path index item in the path avoidance control table, determine that the number meets the start conditions in both references, bind the control path number and the actuator number to form an output combination command, set the combination command as the start trigger action in this cycle, and generate the vehicle thermal management intelligent control operation command.

[0023] The activation sequence chart includes the temperature rise start time, peak occurrence time, fall and stabilization time, path time sorting record, and heat source response time difference marker. The path avoidance control table includes response difference threshold judgment, path number exceeding the difference limit, and comparison results between combined activation and single activation. The timing compensation control list includes the circulation pump response delay time, electronic thermostat opening and closing lag time, cooling fan inverter start delay position, and compensation start command marker. The actuator response level table includes the path temperature difference change rate, rate fluctuation judgment result, control action sequence combination, and start command level number. The vehicle thermal management intelligent control operation command includes the combined control number, path and actuator binding relationship, and initial trigger action setting.

[0024] Please see Figure 2 The specific steps of S1 are as follows: S101: Obtain the activation time and temperature sequence of the heat source number and path number in the coolant circuit, identify the response start point based on the initial temperature difference exceeding the starting threshold, find the maximum value position as the peak point, and the position where the temperature falls back to the fluctuation range as the stable point, and generate a set of temperature response time feature points. First, all heat sources are numbered, and the specific time point when each heat source is triggered by the control module is marked as the activation time. Then, temperature sensors deployed at each node of the path are used to record continuous temperature data before and after activation for the corresponding path number at a frequency of once per second, forming a temperature change sequence over time categorized by path number. For each combination of heat source and path number, the corresponding temperature sequence is extracted, and the average temperature over a certain period before activation is determined as the initial temperature value. This value can be calculated by averaging the data from 10 consecutive seconds of sampling. For example, if the temperatures for 10 consecutive seconds before activation are 24.8, 24.9, 25.0, etc., the average is 25.0°C, which is used as the reference initial temperature. Subsequently, the difference between the current temperature and this initial value is calculated from the second-by-second sampling values ​​after activation, and compared with a set initial threshold. The initial threshold is set based on the feedback... The maximum temperature fluctuation and typical temperature rise under normal operating conditions are set at 3°C. If the temperature difference first equals or exceeds this value, the moment is recorded as the response start point. For example, if the initial temperature differences are 0.5, 1.2, 2.5, and 3.1°C, the time point corresponding to 3.1°C is taken as the starting point, and the temperature sequence is analyzed to find the moment when it reaches the maximum value. This maximum value must satisfy that the temperature drop is greater than 1°C for at least 3 consecutive seconds afterward. For example, if the temperature reaches 29.0°C and then drops to 27.8°C, 26.9°C, and 26.2°C, the moment corresponding to 29.0°C is recorded as the peak point. The data is then compared again. When the temperature is within ±0.5°C of the initial temperature value for 30 consecutive seconds without any breakthrough fluctuations, for example, consecutive recorded values ​​of 24.7°C, 24.8°C, and 25.0°C, all within [24.5°C, ... Within the range of 25.5°C, this time point is taken as the stable point. Finally, the three data points of the response start point, peak point and stable point under the combination of heat source and path number are recorded as the constituent elements of the temperature response time feature point set.

[0025] S102: Call the temperature response time feature point set, sort the three time points in each heat source and path number combination, calculate the interval time from the start to the peak and from the peak to the stable point, and generate a temperature response time interval sequence. For each heat source and path number, extract the starting point, peak point, and stable point. First, compare these three points in chronological order, ensuring the starting point comes first, the peak point second, and the stable point third. Then, calculate the time intervals from the starting point to the peak point and from the peak point to the stable point. For example, if the starting point time is 12 minutes and 15 seconds, the peak point time is 12 minutes and 52 seconds, and the stable point time is 13 minutes and 47 seconds, then the interval from the starting point to the peak is 37 seconds, and the interval from the peak to the stable point is 55 seconds, totaling 92 seconds. These two intervals are recorded as time features to prevent misjudgment. For extreme values, a reasonable range for the interval time needs to be set. For example, the time interval from the start to the peak should be set between 10 and 300 seconds, and the time interval from the peak to the stable state should be set between 20 and 600 seconds. If a set of data does not conform to this range, it is necessary to re-search for feature points or check whether there are abnormal points interfering in the temperature sequence. Finally, the time intervals of all heat source path combinations are recorded as a time interval sequence, labeled in the format of "heat source number-path number-start to peak time-peak time-peak to stable time" as a structured data item, forming a unified temperature response time interval sequence for subsequent sorting and response behavior analysis.

[0026] S103: Call the temperature response time interval sequence and activation time data, calculate the time difference between the response start point and the activation time and sort them, mark the sorting results as sequence numbers, and generate an activation sequence chart; Further, the time difference between the response start point and the activation time of each heat source and path number combination is extracted. Specifically, the activation time of the corresponding group is subtracted from the response start point time recorded in each group of data to obtain the activation delay time difference. For example, if the activation time is 12 minutes and 00 seconds and the response start point is 12 minutes and 15 seconds, the delay time is 15 seconds. After performing this process item by item, a delay time difference set is formed. The set is sorted in ascending order of time difference. After sorting, a sequence number is assigned to each group of data. The combination with the sequence number 1 represents the earliest response, and the larger the sequence number, the later the response. For example, three groups of data with delay times of 10 seconds, 15 seconds, and 18 seconds will be numbered 1, 2, and 3, respectively. Finally, the six items of information, heat source number, path number, activation time, response start point time, time difference value, and sequence number, are merged to form a unified response sequence record table. Each combination item occupies one row of data in the table. This table can be used for further response efficiency analysis and is also convenient for horizontal comparison of the response time differences of different paths to heat source activation.

[0027] Please see Figure 3 The specific steps of S2 are as follows: S201: Call the activation sequence chart, obtain the path temperature sequence of the heat source in the combined activation state, and extract the temperature rise start time point of the path on the time axis. At the same time, obtain the temperature rise start time point of the same heat source in the individual activation state. Align the two sets of start time points according to the path number and perform difference calculation to generate a combined single activation start difference set. First, extract the combination information of each heat source number and path number, and read the complete temperature time series of the corresponding path in the combined activation state. Then, perform a point-by-point search on the temperature series to extract the temperature rise start time point, that is, identify the time point when the temperature first steadily rises from the activation reference temperature and exceeds the temperature rise start judgment threshold. This judgment threshold is set to 3°C, based on the temperature fluctuation range in the normal inactive state of the path. For example, if the initial temperature of the path is 25°C, the threshold is set to 28°C. When the temperature rises continuously and reaches 28°C for the first time, the corresponding time point is taken as the temperature rise start time. After extracting the start point of all paths in the combined activation state, extract the path temperature series again for the same heat source in the individually activated state and perform the same start point extraction. The identification process ensures that the temperature sampling frequency is consistent and the fluctuation judgment range is the same. For example, if the starting point of the heat source H1-path P1 combination is 16 seconds when the combination is activated, and 11 seconds when it is activated alone, then the starting time difference of the corresponding path number P1 is 5 seconds. Similarly, the difference between the starting time of the combination state and the starting time of the single state is calculated for all path numbers. The difference is obtained by directly subtracting the starting point of the single activation state from the starting point of the combination activation state. Positive values ​​represent that the combination response is slower than the single response, and negative values ​​represent that the combination response is faster than the single response. All path numbers and their corresponding differences are combined into structured data, denoted as "path number - starting time difference", and finally a set of combination and single activation starting difference values ​​is generated.

[0028] S202: Call the combined single activation initial difference set, compare the difference range with the preset response difference identification standard value, and when the absolute value of the difference exceeds the response difference identification standard value, extract the corresponding path number and mark it as the path number to be avoided, and generate a list of path numbers that exceed the difference. The start time difference for each path number is extracted item by item, and a preset response difference identification standard value is used to compare the absolute value of the difference with it. The standard value is set based on the maximum deviation of the normal fluctuation of the path temperature response and the allowable error range of the response process, and is set to 5 seconds. When the path temperature rise response is significantly consistent in actual testing, the standard value can be set to a lower value, such as 3 seconds. In scenarios with large fluctuations in the response, it can be increased to more than 10 seconds. When performing the difference comparison, the sign of the difference is not judged, only its absolute value is calculated and compared with the standard value item by item. For example, the difference for path P1 is +6. The difference in seconds for path P2 is -2 seconds, and the difference for path P3 is -9 seconds. With the standard value set at 5 seconds, both paths P1 and P3 exceed this standard value and are considered out-of-tolerance responses. Path P2 is not out of tolerance. The filtering method is to extract all path numbers whose absolute values ​​are greater than the standard value and mark them as "path numbers to be avoided". This marking can be recorded by setting a binary identifier field: 1 represents out-of-tolerance and needs to be avoided, and 0 represents normal paths and does not need to be avoided. Finally, all path numbers that exceed the response difference standard are summarized and organized to generate a structured list of out-of-tolerance path numbers for subsequent avoidance control.

[0029] S203: Based on the list of out-of-tolerance path numbers, extract the corresponding heat source and path number combination information from the activation sequence chart, establish avoidance index conditions according to the path number, record the response sorting, activation difference and path-related control delay parameters of the corresponding path, including circulation pump switching delay, thermostatic valve hysteresis and fan start delay, and generate a path avoidance control table. First, extract all heat source and path number combinations marked as out-of-tolerance paths from the activation sequence chart. Perform a one-time filtering operation by path number, and retrieve the fields of each record in the activation sequence chart, including heat source number, path number, response start time, activation time, delay time difference, and response sort number. Obtain the corresponding heat source number through a path number matching mechanism, and read the response sort number and activation difference as response attributes under that path number. Based on this, construct an avoidance index condition table, with the path number as the primary key field and the response sort number as the sorting reference. The activation difference is used as a time response reference. This structure forms the first-level data structure of the avoidance index. For example, if the activation time for path P4 is 135 seconds and the response start time is 142 seconds, then the activation difference is 7 seconds. If its sort number is 3, then it is recorded in the avoidance index as path P4—sort 3—difference 7 seconds. Furthermore, control delay parameters associated with this path are extracted, specifically the circulation pump switching delay, thermostatic valve hysteresis, and fan start delay. The extraction methods for these three are as follows: The circulation pump switching delay is calculated by the difference between the control command issuance time and the pump speed change start time. For example, if the command is issued at 100 seconds... If the pump speed changes at 103 seconds, the delay is 3 seconds. The thermostatic valve lag is determined by the difference between the trigger time of the control signal and the feedback time when the actual opening reaches the target value. For example, if the opening command is issued at 110 seconds and the sensor feedback reaches 90% at 114 seconds, the delay is 4 seconds. The fan start delay is based on the difference between the start command and the stable rise time of the fan current. For example, if the fan command is issued at 120 seconds and the current begins to change at 124 seconds, the delay is 4 seconds. All three delay values ​​are written as control delay parameters in the path avoidance record. To ensure the rationality of the parameter recording, the range of the above delay values ​​needs to be verified. The mechanism sets the normal range for the circulation pump delay to 1 to 5 seconds, the thermostat valve lag to 2 to 6 seconds, and the fan start delay to 3 to 8 seconds. Paths exceeding these ranges must be individually marked as abnormal delay paths. Finally, the heat source number, response sorting number, activation time difference, and three types of control delay parameters corresponding to each out-of-tolerance path number are combined and written into the structured path avoidance control table. An example record item structure is "Path Number: P4, Heat Source Number: H3, Sorting Number: 3, Activation Difference: 7 seconds, Circulation Pump Delay: 3 seconds, Thermostat Valve Lag: 4 seconds, Fan Delay: 4 seconds". All paths in the out-of-tolerance path number list are traversed.

[0030] Please see Figure 4 The specific steps of S3 are as follows: S301: Read the path avoidance control table, collect the coolant circulation pump switching delay time, electronic thermostat opening and closing lag time, and cooling fan start delay time for the corresponding path, aggregate the three types of time points, and generate a path control action delay time point set. For each path number in the table, perform information collection operations, sequentially extracting the switching delay time of the coolant circulation pump, the opening / closing lag time of the electronic thermostat, and the starting delay time of the radiator fan within the corresponding path. The switching delay time of the coolant circulation pump is extracted by the time difference between the pump start command issuance and the actual start time of the speed change. For example, if the command is issued at 120 seconds and the speed increase begins at 124 seconds, the switching delay is 4 seconds. The opening / closing lag time of the electronic thermostat is the response difference between the control command trigger and the actual feedback of the valve position. For example, if the valve opening command is issued at 130 seconds and the valve position sensor feedback is... If the 90% opening begins at 134 seconds, the lag is 4 seconds. The cooling fan start delay is calculated from the time difference between the moment the fan start command is issued and the moment when the wind speed or fan current changes significantly. For example, if the fan start command is issued at 138 seconds and the current reaches a stable increment at 141 seconds, the delay is 3 seconds. After data collection, the three types of time points are aggregated into the same structure record item using the path number as the index, forming a data structure of "path number - circulation pump delay time - thermostatic valve delay time - fan delay time". All path number data items are processed in sequence to finally form a set of path control action delay time points.

[0031] S302: Call the path control action delay time point set, calculate the time difference between the three types of time points within the unified control cycle, and determine whether there is an offset exceeding the time overlap threshold, and obtain a list of time point overlap offset path numbers. For each path number, the time difference calculation is performed on the delay points of the three types of control actions within a unified control cycle. Specifically, the delay points of the circulating pump, thermostat valve, and fan are extracted, and the pairwise time differences between them are calculated. The first step is to subtract the circulating pump delay point from the thermostat valve delay point to obtain the first difference; the second step is to subtract the thermostat valve delay point from the fan delay point to obtain the second difference; and the third step is to subtract the circulating pump delay point from the fan delay point to obtain the third difference. For example, for path P7, the three delay points are 124 seconds for the circulating pump, 134 seconds for the thermostat valve, and 141 seconds for the fan, with differences of 10 seconds, 7 seconds, and 17 seconds respectively. Subsequently, these three... Any item in the time difference will be subject to an offset judgment operation. The absolute value of the time difference will be compared with a preset time overlap threshold. If any item's difference is less than the threshold, it will be judged as an overlap offset. The overlap threshold is set based on the control response linkage time requirement and is set to 8 seconds. When the difference is less than 8 seconds, it means that there is an unreasonable overlap between control actions. For example, in the aforementioned path, the second item's difference is 7 seconds, which is less than 8 seconds. Therefore, path P7 is marked as having an overlap offset. Following this logic, all path numbers will be traversed for the three types of time point difference combinations. Path numbers with at least one time difference less than the overlap threshold will be selected, and finally, a list of time point overlap offset path numbers will be generated.

[0032] S303: Based on the list of overlapping offset path numbers at time points, extract the corresponding path numbers and construct a compensation action instruction index. Combine the compensation items with the delay parameters to generate a timing compensation control list. Each path number is extracted item by item, and the corresponding delay time point information is located in the path control action delay point set. The delay values ​​of the circulation pump, thermostat valve, and fan are read together as parameter references for compensation adjustment. Then, the path number, delay type, and compensation direction are combined to construct a compensation action instruction index. For example, if the offset between the timing of the thermostat valve and the fan in path P7 is less than the threshold, a pre-start compensation time needs to be added to the fan action. This compensation time can be set as the difference between the original time difference and the overlap threshold. For example, if the actual time difference is 7 seconds and the threshold is 8 seconds, then the compensation item is set to start 1 second in advance. The compensation time for each type of control action is calculated according to this rule, and the instructions are filled in according to the actual configuration rules of the delay parameters. For example, the circulation pump is allowed to adjust by ±3 seconds, the thermostat valve is allowed to adjust by ±2 seconds, and the fan is allowed to start 1 second in advance. The upper and lower limits of compensation are determined according to the physical capacity range of the equipment. A structured entry of "path number - compensation control item type - adjustment time - control offset direction" is constructed under each path item. Finally, all compensation instruction items are collected into a unified control list and output as a timing compensation control list.

[0033] Please see Figure 5 The specific steps of S4 are as follows: S401: Read the timing compensation control list, monitor the temperature difference data sequence of the coolant in the main branch channel of the heat exchanger within the path, extract the temperature difference change range of the initial activation segment, calculate the derivative sequence of the temperature difference with respect to time within the range, and generate a set of temperature difference change rate curves. The corresponding compensation action path item is located item by item according to the path number. The temperature difference monitoring data of the main and branch channels of the heat exchanger is called up, and the temperature difference of the coolant in the main channel and branch channel in each path is sampled. The sampling frequency is set to once per second, and the sampling period is the first 30 seconds after the compensation action is triggered. This period is defined as the initial activation period. The temperature difference value sequence per second in this period is extracted as the basis for analysis. Then, based on the continuity of time, the change difference between adjacent data items in the temperature difference sequence is calculated, that is, the increment of the temperature difference between any two adjacent seconds is counted. Combined with the constancy of adjacent time intervals, the temperature difference change rate sequence is obtained. This change rate is essentially the rate of change of temperature difference with respect to time. Although it is not necessary to explicitly import the mathematical formula, in actual operation, it is still necessary to traverse the initial activation period data of each path and compare the temperature difference change second by second. For example, if the temperature difference of path A in the initial activation phase is continuously recorded as 2.0°C, 2.6°C, 3.0°C, and 3.5°C, then its temperature difference change rate is 0.6°C, 0.4°C, and 0.5°C respectively. Throughout the process, the change rate corresponding to each second needs to be continuously recorded to ensure that the length of the rate sequence is equal to the number of temperature difference points minus one. At the same time, path record items with abnormal temperature difference data breakpoints are removed. When there is no data for two consecutive seconds or abnormal fluctuations exceed the normal change limit (such as a sudden change exceeding 3°C), the sequence is deemed invalid and will not participate in the subsequent rate curve generation. All path numbers that pass the test and their corresponding temperature difference change rate sequences will be uniformly stored and included as structured data entries in the form of "path number-rate sequence", thus completing the generation of the temperature difference change rate curve set.

[0034] S402: Call the set of temperature difference change rate curves, compare the fluctuation amplitude of each curve in the initial stage of activation with the preset thermal judgment range value, determine whether there is a path number that exceeds the range, and generate a thermal fluctuation path number table. Each path number corresponding to a rate curve is retrieved item by item, with a focus on analyzing the rate fluctuation amplitude within the initial activation range. The analysis involves extracting the maximum and minimum rate of change values ​​from the rate sequence and calculating the difference between them. This difference represents the intensity of temperature change in the initial response phase of the path. For example, if the maximum rate of change in the rate sequence of path B is 1.8°C / s and the minimum rate of change is −0.2°C / s, then the fluctuation amplitude is 2.0°C / s. This value is directly compared with the preset thermosensitive judgment range value. The thermosensitive judgment range value needs to be determined based on a comprehensive evaluation of parameters such as the heat transfer stability of the path pipe material, the coolant circulation rate, and the heating power of the heat source. The standard setting is 1. The threshold of 0.5°C / s indicates that the temperature difference rate exceeds the system's allowable range. When the fluctuation amplitude of a path exceeds this threshold, it is determined to be an abnormal thermal fluctuation path. The judgment process uses an absolute value comparison method, regardless of the positive or negative direction of the rate. For example, if the fluctuation amplitude of path C is 2.3°C / s, it is directly compared with the threshold of 1.5°C / s and the result is abnormal. If the fluctuation amplitude of path D is 1.2°C / s, it is considered normal. Finally, the path numbers of all paths with fluctuation amplitudes exceeding the threshold are extracted, and their judgment results and fluctuation amplitudes are recorded together to generate a thermal fluctuation path number table. Each item in the table contains a path number, actual fluctuation amplitude value, and judgment label field. The judgment label uses 1 to mark abnormal and 0 to mark normal.

[0035] S403: Based on the thermal fluctuation path number table and the action instruction index in the timing compensation control list, extract the action execution order corresponding to each path and sort them together. Map the path number and sorting order to hierarchical items to generate an actuator response level table. The corresponding action instruction index item in the timing compensation control list is retrieved item by item. All compensation control actions configured for each path are extracted. Action types may include coolant pump early start, thermostat valve delayed control, fan pre-start, etc. Each action is accompanied by its control trigger point in the compensation list. This trigger point is the main basis for establishing the execution order. First, the trigger points of all actions under this path are extracted. Then, these trigger points are sorted from earliest to latest time. After sorting, the sorting position number is assigned to the corresponding action. For example, the three actions under path E are at 10 seconds, 14 seconds, etc. The action is executed at the 18th second, corresponding to the sequence numbers 1, 2, and 3. The execution order of sequence number 3 is mapped to path number E, indicating that the action under path E is executed in the 3rd order within this cycle. All hot-sensitive paths are organized and recorded in a unified manner according to this logic, and finally a mapping set of path numbers and action execution order is established to form an actuator response level table. Each record in this table contains a path number, action sequence number, and hot-sensitive flag field. The hot-sensitive flag field is retained from the judgment result of the previous stage and is only used in the subsequent control flow to filter hot-sensitive paths and adjust their priorities.

[0036] Please see Figure 6 The specific steps of S5 are as follows: S501: Read the first and second digits of the start instruction level in the actuator response level table, call the compensation action content of the corresponding number in the timing compensation control list, extract the activation trigger status label, call the path index item of the number in the path avoidance control table, determine whether both are in the start state, and generate a dual start number set. The path number item with the highest start command level is selected. Based on the standard that the sort number equals 1, the actuator number associated with that path number is extracted. Then, the timing compensation control list is retrieved based on this number to obtain the corresponding compensation action item. The specific compensation control content field is read from the action item, such as fan pre-triggering, coolant pump pre-start, or thermostat valve delayed opening. The activation trigger status label bound to the action is extracted. The status label is a Boolean field indicating whether the action is set as a start flag; typically, a value of "1" represents start and "0" represents non-start. The same path number is then used to query the path avoidance control table and call its corresponding path. The path index entry locates whether the current path is in an active state because it has been marked as a path to be avoided. The state is also stored in Boolean form. If both the executor action state and the path state are "1", then the path and the corresponding executor combination is considered a double-start path entry. For example, if executor E1 is bound to path P1, it is at the top of the response level table, the activation label is 1 in the compensation list, and the P1 state is marked as 1 in the path avoidance table, then this combination constitutes a valid double start. Repeat the above operation logic to judge and compare all path numbers with the response level at the top, and extract the combination numbers that meet the double start conditions. Finally, summarize and generate a double start number set.

[0037] S502: Call the dual-startup number set, pair each path number with the executor number, establish a two-way binding relationship between the path number and the corresponding executor number, construct a combined structure instruction item, and generate a path executor binding instruction set; A one-to-one mapping between path numbers and actuator numbers is established to construct a two-way binding relationship. First, the path number in each record is used as the primary key field to find its bound actuator number, thus establishing the first mapping direction. Based on this, a reverse index is built, using the actuator number as the primary key to find the path number again, forming the second mapping direction. This ensures that either party can access its pairing relationship. Subsequently, these two types of mapping relationships are integrated to construct a combined structure instruction item. The structure should simultaneously contain five basic fields: path number, actuator number, compensation action type, trigger time, and execution order. This supports subsequent sorting and matching by path or by device in the scheduling and control process. For example, if the path number in the combined item is P2, the actuator number is E2, the compensation type is coolant pump advance, the trigger time is the 10th second, and the execution order number is 1, then this structure completely describes the control intent and timing relationship of the P2-E2 combination. The entire set of dual-start numbers is traversed according to this format to generate corresponding structure instruction items. All combined items are uniformly encapsulated to form a path actuator binding instruction set. All records in the set have a unique combination identifier, which is used for direct reading during the system triggering and execution phases.

[0038] S503: Based on the path executor binding instruction set, select the combination item that is the first trigger condition in the current cycle, mark it as the start action, assign the combination instruction to the trigger priority in the current control cycle, and generate vehicle thermal management intelligent control operation instructions. The trigger time field of all combined structure instruction items is scanned, and the trigger time of each combined item is sorted according to the starting reference point of the current control cycle. The combined item that meets the starting condition earliest is extracted as the starting action of the current cycle. The filtering method is to sort all trigger time points in ascending order of value, locate the one with the smallest value, and mark it as the starting identifier item of this cycle after bidirectional confirmation with its path number and actuator number. Then, a priority label is assigned to this item, and the priority field value is set as the relative level within the control cycle, starting from 1 and numbered sequentially. Other subsequent starting items are numbered sequentially according to the trigger time interval to ensure that the starting action has the highest response authority in the entire control cycle. Finally, the path number, actuator number, compensation type, trigger time, and priority field are combined and written into a unified control instruction record. This record constitutes the vehicle thermal management intelligent control operation instruction for the current cycle. All fields are summarized in a unified format and appended to the operation instruction list, marked as the instruction entry item for the current cycle.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A vehicle thermal management intelligent control method, characterized in that, Includes the following steps: S1: Extract the starting point, peak point, and fall point of temperature rise in the coolant circuit, sort them by path number, compare the time interval of the three points under the heat source, mark them in combination with the time difference between heat source activation and temperature change, and generate an activation sequence chart. S2: Based on the activation sequence chart, extract the temperature change points of the path when the heat source is activated simultaneously, calculate the temperature rise difference between the combination and the single activation, determine whether it exceeds the response difference standard, and generate a path avoidance control table. S3: Read the path avoidance control table, obtain the circulation pump switching delay, thermostat lag, and fan start delay, determine whether the three are offset within the same cycle, and generate a timing compensation control list. S4: Based on the timing compensation control list, analyze the temperature difference trend of the heat exchanger channel, extract the initial speed, determine whether it exceeds the thermal sensitivity range, sort the path number and control sequence, and output the actuator response level table. S5: Based on the actuator response level table, call the corresponding compensation action and path index item, determine whether the start conditions are met at the same time, bind the path and actuator number, set it as the cycle start action, and generate vehicle thermal management intelligent control operation instructions.

2. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The activation sequence chart includes the temperature rise start time, peak occurrence time, fall and stabilization time, path time sorting record, and heat source response time difference marker. The path avoidance control table includes response difference threshold judgment, path number exceeding the difference limit, and comparison results of combined activation and single activation. The timing compensation control list includes the circulation pump response delay time, electronic thermostat opening and closing lag time, cooling fan inverter start delay position, and compensation start command marker. The actuator response level table includes the path temperature difference change rate, rate fluctuation judgment result, control action sequence combination, and start command level number. The vehicle thermal management intelligent control operation command includes the combined control number, path and actuator binding relationship, and initial trigger action setting.

3. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The response difference standard refers to the deviation threshold between combined activation and single activation paths in terms of temperature rise onset time.

4. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The thermal sensitivity range refers to the allowable variation range of the rate of temperature difference change in the initial section of the heat exchanger channel within a set time. If it exceeds this range, path and control compensation is required.

5. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The specific steps of S1 are as follows: S101: Obtain the activation time and temperature sequence of the heat source number and path number in the coolant circuit, identify the response start point based on the initial temperature difference exceeding the starting threshold, find the maximum value position as the peak point, and the position where the temperature falls back to the fluctuation range as the stable point, and generate a set of temperature response time feature points. S102: Call the temperature response time feature point set, sort the three time points in each heat source and path number combination, calculate the interval time from the start to the peak and from the peak to the stable point, and generate a temperature response time interval sequence. S103: Call the temperature response time interval sequence and activation time data, calculate the time difference between the response start point and the activation time, sort them, mark the sorting results as sequence numbers, and generate an activation sequence chart.

6. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The specific steps of S2 are as follows: S201: Call the activation sequence chart to obtain the path temperature sequence of the heat source in the combined activation state, and extract the temperature rise start time point of the path on the time axis. At the same time, obtain the temperature rise start time point of the same heat source in the individual activation state. Align the two sets of start time points according to the path number and perform difference calculation to generate a combined single activation start difference set. S202: Call the combined single activation initial difference set, compare the difference range with the preset response difference identification standard value, and when the absolute value of the difference exceeds the response difference identification standard value, extract the corresponding path number and mark it as the path number to be avoided, and generate a list of path numbers that exceed the difference. S203: Based on the list of out-of-tolerance path numbers, extract the corresponding heat source and path number combination information from the activation sequence chart, establish avoidance index conditions according to the path number, record the response sorting, activation difference and path-related control delay parameters of the corresponding path, including circulation pump switching delay, thermostat hysteresis and fan start delay, and generate a path avoidance control table.

7. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The specific steps for S3 are as follows: S301: Read the path avoidance control table, collect the coolant circulation pump switching delay time, electronic thermostat opening and closing lag time, and cooling fan start delay time for the corresponding path, aggregate the three types of time points, and generate a path control action delay time point set. S302: Call the path control action delay time point set, calculate the time difference between the three types of time points within the unified control cycle, and determine whether there is an offset exceeding the time overlap threshold, and obtain a list of time point overlap offset path numbers. S303: Based on the list of overlapping offset path numbers at the time points, extract the corresponding path numbers and construct a compensation action instruction index. Combine the compensation items with the delay parameters to generate a timing compensation control list.

8. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The specific steps of S4 are as follows: S401: Read the timing compensation control list, monitor the temperature difference data sequence of the coolant in the main branch channel of the heat exchanger within the path, extract the temperature difference change interval of the initial activation segment, calculate the derivative sequence of the temperature difference with respect to time within the interval, and generate a set of temperature difference change rate curves. S402: Call the set of temperature difference change rate curves, compare the fluctuation amplitude of each curve in the initial activation stage with the preset thermosensitive judgment range value, determine whether there is a path number that exceeds the range, and generate a thermosensitive fluctuation path number table. S403: Based on the thermal fluctuation path number table and the action instruction index in the timing compensation control list, extract the action execution order corresponding to each path and sort them together. Map the path number and sorting order to hierarchical items to generate an actuator response level table.

9. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The specific steps of S5 are as follows: S501: Read the first and second digits of the start instruction level in the actuator response level table, call the compensation action content in the timing compensation control list with the corresponding number, extract the activation trigger status label, call the path index item with the number in the path avoidance control table, determine whether both are in the start state, and generate a dual start number set. S502: Call the dual-startup number set, pair each path number with the executor number, establish a two-way binding relationship between the path number and the corresponding executor number, construct a combined structure instruction item, and generate a path executor binding instruction set; S503: Based on the path actuator binding instruction set, select the combination item that is the first trigger condition in the current cycle, mark it as the starting action, assign the combination instruction the trigger priority in the current control cycle, and generate vehicle thermal management intelligent control operation instructions.

10. The intelligent control method for vehicle thermal management according to claim 1, characterized in that, The activation condition refers to the judgment criteria triggered when the path temperature rise trend meets the activation sequence requirements and the controller is in an operable state.

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