A method and device for early warning of frequent regeneration of a dpf

Abstract

The application relates to a DPF frequent regeneration early warning method and device, and relates to the diesel engine technical field. The early warning method determines whether DPF regeneration of a vehicle occurs according to the aftertreatment temperature condition of the vehicle or according to the carbon load change condition of the vehicle, then calculates the actual DPF regeneration mileage of the vehicle according to the running mileage recorded when the vehicle undergoes DPF regeneration, finally obtains the target DPF regeneration mileage of the current vehicle, and determines whether to perform DPF frequent regeneration early warning in combination with the target DPF regeneration mileage of the vehicle. The early warning method provided by the application diagnoses the DPF regeneration event and then calculates the actual DPF regeneration mileage of the vehicle, and then diagnoses the DPF frequent regeneration problem according to the difference between the actual DPF regeneration mileage and the target DPF regeneration mileage of different application scenes, so that the problem that the DPF frequent regeneration is not accurate in the related art, the vehicle fuel consumption is high, and the vehicle operation cost is high is solved.

Description

Technical Field

[0001] This application relates to the field of diesel engine technology, and in particular to a method and device for early warning of frequent DPF regeneration. Background Technology

[0002] Currently, diesel engine manufacturers are developing China VI diesel engines. In order to reduce carbon particulate emissions in engine exhaust, China VI diesel engines are equipped with DPF systems. After the particles are captured by the DPF system, they remain on the wall of the DPF. When a large amount of carbon load accumulates on the surface of the DPF, it will cause the exhaust back pressure to increase, affecting the overall economy and power. Therefore, when the carbon load is high, it will trigger DPF regeneration to burn off the carbon load inside the DPF, thereby restoring the DPF back pressure to normal.

[0003] In related technologies, DPF regeneration involves injecting fuel into the cylinder after injection or into the exhaust pipe. The combustion of this fuel raises the exhaust temperature, burning off the carbon load inside the DPF. Therefore, frequent DPF regeneration leads to increased fuel consumption and operating costs. Furthermore, the high exhaust temperature during DPF regeneration can cause thermal aging in the aftertreatment system, shortening its lifespan. Generally, the rate of carbon load accumulation within the DPF varies under different operating conditions, resulting in different DPF regeneration mileages. A single regeneration mileage cannot be used to determine if DPF regeneration is normal. Related technologies often set a fixed regeneration mileage to determine if frequent regeneration is occurring. Additionally, the same regeneration mileage is sometimes used for vehicles with different applications, all of which contribute to inaccurate assessments of frequent DPF regeneration. Summary of the Invention

[0004] This application provides a method and apparatus for early warning of frequent DPF regeneration, in order to solve the problem in related technologies where inaccurate judgment of frequent DPF regeneration leads to high vehicle fuel consumption and high vehicle operating costs.

[0005] Firstly, a method for early warning of frequent DPF regeneration is provided, the steps of which include:

[0006] Whether DPF regeneration has occurred can be determined based on the vehicle's aftertreatment temperature or changes in the vehicle's carbon load.

[0007] If it is determined that the vehicle has undergone DPF regeneration, the current mileage of the vehicle is recorded, and the actual DPF regeneration mileage of the vehicle is calculated based on the recorded mileage.

[0008] Obtain the target DPF regeneration mileage for the current vehicle, and determine whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage.

[0009] In conjunction with the first aspect, in one embodiment, the step of determining whether DPF regeneration has occurred in the vehicle based on the vehicle's aftertreatment temperature includes:

[0010] Get the temperature data between the current operating point and the operating point a first preset time before the current operating point, determine whether the temperature data is greater than the preset temperature, and if so, get the total high temperature time within the first preset time period that is greater than the preset temperature.

[0011] Calculate the ratio of the total high-temperature time to the first preset time, and determine whether the ratio is greater than the first preset ratio. If so, the high-temperature counter counts once.

[0012] Determine whether the count of the high temperature counter is greater than the first preset count. If so, determine that the vehicle has undergone DPF regeneration.

[0013] In conjunction with the first aspect, in one embodiment, the temperature data includes the SCR inlet temperature or the DPF inlet temperature.

[0014] In conjunction with the first aspect, in one embodiment, the step of determining whether a vehicle has undergone DPF regeneration based on changes in the vehicle's carbon load includes:

[0015] Obtain carbon load data between the current operating point and the operating point at a second preset time interval prior to the current operating point, determine whether the carbon load is greater than a first preset carbon load, if so, obtain the total high carbon load time within the second preset time interval that is greater than the first preset carbon load, calculate the ratio of the total high carbon load time to the second preset time interval, and determine whether the ratio is greater than the second preset ratio, if so, assign the high carbon load flag to 1;

[0016] Determine whether the carbon loading is less than the second preset carbon loading. If so, obtain the total low carbon loading time within the second preset time period that is less than the second preset carbon loading, calculate the ratio of the total low carbon loading time to the second preset time, and determine whether the ratio is greater than the third preset ratio. If so, assign the low carbon loading flag to 1.

[0017] If the high carbon load flag is assigned a value of 1 first, followed by the low carbon load flag being assigned a value of 1, and the time interval between the two is less than the preset time interval, then it is determined that the vehicle has undergone DPF regeneration.

[0018] In conjunction with the first aspect, in one embodiment, the step of calculating the vehicle's actual DPF regeneration mileage based on the recorded operating mileage includes:

[0019] Calculate the difference between the currently recorded mileage and the previously recorded mileage to obtain the actual DPF regeneration mileage of the vehicle when two consecutive DPF regenerations occur.

[0020] In conjunction with the first aspect, in one embodiment, the step of obtaining the target DPF regeneration mileage of the vehicle includes:

[0021] Obtain vehicle type, road type, and vehicle driving information;

[0022] Clustering analysis algorithms are used to analyze the vehicle type, road type, and vehicle driving information to determine the vehicle's application scenario, thereby confirming the target DPF regeneration mileage.

[0023] In conjunction with the first aspect, in one implementation, the vehicle driving information includes average vehicle speed, idle speed percentage, engine speed, and output torque percentage.

[0024] In conjunction with the first aspect, in one implementation, the step of determining whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage includes:

[0025] Calculate the ratio of the actual DPF regeneration mileage to the target DPF regeneration mileage, and determine whether the ratio is less than a fourth preset ratio. If so, the DPF regeneration anomaly counter counts once.

[0026] Determine whether the number of counts of the DPF regeneration anomaly counter within a set time period is greater than the second preset count. If so, issue a frequent DPF regeneration warning.

[0027] In conjunction with the first aspect, in one implementation, the value of the fourth preset ratio is no greater than 0.5, and the value of the set time ranges from 30 to 40 days.

[0028] Secondly, a warning device for frequent DPF regeneration is provided, which is used to implement the aforementioned warning method for frequent DPF regeneration, and includes:

[0029] The information acquisition module is used to acquire information on the vehicle's aftertreatment temperature and carbon load changes, as well as the vehicle's operating mileage and target DPF regeneration mileage.

[0030] The information judgment module is used to determine whether the vehicle has undergone DPF regeneration based on the vehicle's after-treatment temperature or based on changes in the vehicle's carbon load.

[0031] The information execution module is used to calculate the actual DPF regeneration mileage of the vehicle based on the recorded operating mileage, and is also used to determine whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage.

[0032] The beneficial effects of the technical solution provided in this application include at least the following:

[0033] This application provides a method for early warning of frequent DPF regeneration. It determines whether DPF regeneration has occurred based on the vehicle's aftertreatment temperature or changes in carbon load. Then, it calculates the vehicle's actual DPF regeneration mileage based on the recorded mileage at the time of DPF regeneration. Finally, it determines whether to issue a frequent DPF regeneration warning based on the vehicle's target DPF regeneration mileage. This method diagnoses DPF regeneration events and calculates the vehicle's actual DPF regeneration mileage. It then diagnoses the frequent DPF regeneration problem by comparing the actual regeneration mileage with the target regeneration mileage for different application scenarios. This solves the problem in related technologies where inaccurate judgment of frequent DPF regeneration leads to high vehicle fuel consumption and high vehicle operating costs. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A flowchart illustrating the early warning method for frequent DPF regeneration provided in this application embodiment;

[0036] Figure 2 This is a schematic diagram of a process for determining whether a vehicle has undergone DPF regeneration based on the vehicle's after-treatment temperature, as provided in an embodiment of this application.

[0037] Figure 3 This is a schematic diagram illustrating the process of determining whether a vehicle has undergone DPF regeneration based on changes in the vehicle's carbon load, as provided in this embodiment of the application.

[0038] Figure 4 This is a schematic diagram of the process for obtaining the target DPF regeneration mileage of a vehicle, provided in an embodiment of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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.

[0040] This application provides a method for early warning of frequent DPF regeneration, which can solve the problem in related technologies where inaccurate judgment of frequent DPF regeneration leads to high vehicle fuel consumption and high vehicle operating costs.

[0041] See Figure 1 As shown, the early warning method for frequent DPF regeneration mainly includes the following steps: First, it determines whether DPF regeneration has occurred based on the vehicle's aftertreatment temperature or the vehicle's carbon load. If DPF regeneration has occurred, the current vehicle mileage is recorded, and the actual DPF regeneration mileage is calculated based on the recorded mileage. Then, the target DPF regeneration mileage is obtained. Finally, it determines whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage.

[0042] Specifically, determining whether a vehicle has experienced DPF regeneration can be based on the vehicle's aftertreatment temperature or changes in carbon load. Once DPF regeneration is detected, it is recorded as a DPF regeneration event. Simultaneously, the vehicle's mileage at the time of the event is recorded. The actual DPF regeneration mileage is calculated, and then the target DPF regeneration mileage for the corresponding time period is obtained. Finally, based on the actual and target DPF regeneration mileages, a frequent DPF regeneration warning can be issued. This frequent DPF regeneration warning method diagnoses DPF regeneration events to calculate the vehicle's actual DPF regeneration mileage, and then diagnoses the frequent DPF regeneration problem based on the difference between the actual and target mileage for the corresponding application scenario. This avoids the problems of inaccurate DPF regeneration judgments, leading to high fuel consumption and high operating costs, caused by setting fixed actual or target DPF regeneration mileages in related technologies.

[0043] Further, see Figure 2As shown, the steps for determining whether a vehicle has undergone DPF regeneration based on its after-treatment temperature mainly include: firstly, acquiring temperature data between the current operating point and the operating point a first preset time before the current operating point; determining whether the temperature data is greater than a preset temperature; if so, acquiring the total high-temperature time greater than the preset temperature within the first preset time period; then calculating the ratio of the total high-temperature time to the first preset time, and determining whether the ratio is greater than the first preset ratio; if so, the high-temperature counter counts once; finally, determining whether the number of counts by the high-temperature counter is greater than the first preset count; if so, determining that the vehicle has undergone DPF regeneration.

[0044] Specifically, the vehicle's after-treatment temperature refers to identifying DPF regeneration events based on the after-treatment temperature, acquiring temperature data between the current operating point and the operating point a first preset time prior to the current operating point, i.e., acquiring temperature data between the current time and the first preset time prior. For example, selecting the operating point of time period t1 before the current operating point, where t1 is the first preset time, and t1 can be 1 to 100 minutes, calculating the high-temperature percentage of the acquired temperature data during this period, and if the temperature data is greater than the preset temperature, then accumulating the high-temperature time t2, which is the time during time period t1 when the temperature exceeds the preset temperature, calculating the total high-temperature time, and determining whether to start the high-temperature counter based on the ratio β of the total high-temperature time to the first preset time and the first preset ratio. Specifically, in this embodiment, the preset temperature ranges from 550℃ to 600℃, the first preset ratio ranges from 0.3 to 0.8, and the first preset count ranges from 100 to 300. Preferably, the first preset count is generally an integer. When calculating the ratio β of the high-temperature time percentage, β is the ratio of t2 / t1. If β is greater than the first preset ratio, the high-temperature counter is incremented by 1. If the high-temperature counter is greater than the first preset count, it is determined that the vehicle has undergone DPF regeneration.

[0045] Furthermore, the temperature data includes the SCR inlet temperature or the DPF inlet temperature.

[0046] Further, see Figure 3As shown, the steps for determining whether a vehicle has undergone DPF regeneration based on changes in vehicle carbon load mainly include: firstly, acquiring carbon load data between the current operating point and an operating point at a second preset time interval prior to the current operating point; determining whether the carbon load is greater than a first preset carbon load; if so, acquiring the total high carbon load time within the second preset time interval that is greater than the first preset carbon load, calculating the ratio of the total high carbon load time to the second preset time interval, and determining whether the ratio is greater than a second preset ratio; if so, assigning a high carbon load flag of 1; simultaneously, determining whether the carbon load is less than the second preset carbon load; if so, acquiring the total low carbon load time within the second preset time interval that is less than the second preset carbon load, calculating the ratio of the total low carbon load time to the second preset time interval, and determining whether the ratio is greater than a third preset ratio; if so, assigning a low carbon load flag of 1; if a high carbon load flag of 1 appears first, followed by a low carbon load flag of 1, and the time interval between the two is less than a preset time interval, then determining that the vehicle has undergone DPF regeneration.

[0047] Specifically, based on the changes in vehicle carbon load, this refers to identifying regeneration events based on changes in carbon load, acquiring carbon load data between the current operating point and the operating point at a second preset time prior to the current operating point, i.e., acquiring carbon load data between the current time and the second preset time prior. For example, selecting the operating point at time t3 before the current operating point, where t3 is the second preset time, and t3 can be 30-60 minutes, calculating the proportion of high carbon load data acquired during this period. If the carbon load data is greater than the first preset carbon load, then the high carbon load time t4 is accumulated. The high carbon load time t4 is the time during time t3 when the carbon load exceeds the first preset carbon load. After calculating the sum of the high carbon load times, based on the ratio γ of the sum of the high carbon load times and the second preset time and the second preset ratio, it is determined whether to assign a value to the high carbon load flag. When determining low carbon load, the proportion of low carbon load data acquired within the second preset time period is calculated. If the carbon load data is less than the second preset carbon load, the low carbon load time t5 is accumulated. The low carbon load time t5 is the time within the time period t3 when the carbon load is less than the second preset carbon load. After calculating the total low carbon load time, the value of the ratio η between the total low carbon load time and the second preset time is used to determine whether to assign a value to the low carbon load flag. Specifically, in this embodiment, the first preset carbon load can be a suitable value such as 1g / L or 2g / L, the second preset carbon load can be a suitable value such as 0.2g / L or 0.5g / L, the second preset ratio and the third preset ratio can both be in the range of 0.5 to 0.7, and the preset time interval can be a suitable value such as 30min or 60min. Similarly, γ is the ratio of t4 / t3, and η is the ratio of t5 / t3. If γ is greater than the second preset ratio, the high carbon load flag is assigned a value of 1. If η is less than the third preset ratio, the low carbon load flag is assigned a value of 1. If the high carbon load flag is 1 first, and then the low carbon load flag is 1, and the time interval between the two is less than the preset time interval, then it is determined that the vehicle has undergone DPF regeneration.

[0048] Furthermore, the step of calculating the vehicle's actual DPF regeneration mileage based on the recorded mileage mainly includes: calculating the difference between the currently recorded mileage and the previously recorded mileage to obtain the vehicle's actual DPF regeneration mileage at the time of two consecutive DPF regeneration events. Specifically, when the first DPF regeneration event occurs, the vehicle mileage at this time is recorded as L1; when the second DPF regeneration event occurs, the vehicle mileage at this time is recorded as L2; ​​when the third DPF regeneration event occurs, the vehicle mileage at this time is recorded as L3. The actual DPF regeneration mileage of the vehicle at different time periods is the difference between two consecutive recorded vehicle mileages. That is, the first actual DPF regeneration mileage ΔL1 is the difference between L2 and L1, the second actual DPF regeneration mileage ΔL2 is the difference between L3 and L2, and so on, to obtain the vehicle's actual DPF regeneration mileage ΔL for the corresponding time period. n .

[0049] Further, see Figure 4 As shown, the steps for obtaining the target DPF regeneration mileage for a vehicle mainly include: first, obtaining the vehicle type, road type, and vehicle driving information; then, using a clustering analysis algorithm to analyze the vehicle type, road type, and driving information to obtain the vehicle's application scenario; and finally, obtaining the target DPF regeneration mileage. Specifically, different vehicles have different actual uses and operating conditions, therefore the target DPF regeneration mileage also varies. For example, the target DPF regeneration mileage for long-distance transport vehicles is generally greater than 10,000 km, while the target DPF regeneration mileage for urban driving vehicles is generally around 2,000 km. Therefore, different target DPF regeneration mileages need to be defined based on the vehicle type and road type. Furthermore, the vehicle type and road type affect the vehicle driving information, which in turn affects the target DPF regeneration mileage; therefore, all these factors need to be considered to obtain the most accurate target DPF regeneration mileage possible.

[0050] Furthermore, the vehicle driving information mainly includes average vehicle speed, idle speed percentage, engine speed, and output torque percentage. When determining the target DPF regeneration mileage of a vehicle based on its intended use, the classification can be defined as follows:

[0051] (1) Purpose 1: Tractor / cargo truck type, average vehicle speed greater than the speed setting value (e.g., 50km / h), highway road ratio greater than the road setting value (e.g., 20%), and idle speed ratio less than the idle speed setting value (e.g., 20%), etc.

[0052] (2) Application 2: Tractor / cargo vehicle type, average vehicle speed less than the speed setting value (e.g., 50km / h), highway road ratio less than the road setting value (e.g., 20%), and idle speed ratio greater than the idle speed setting value (e.g., 20%).

[0053] (3) Purpose 3: Engineering vehicle type, average vehicle speed greater than the speed setting value (e.g., 50km / h), highway road ratio greater than the road setting value (e.g., 20%), and idle speed ratio less than the idle speed setting value (e.g., 20%), etc.

[0054] (4) Application 4: Engineering vehicle type, average vehicle speed less than the speed setting value (e.g., 50km / h), highway road ratio less than the road setting value (e.g., 20%), and idle speed ratio greater than the idle speed setting value (e.g., 20%).

[0055] Based on the above definitions, the target DPF regeneration mileage of the vehicle is determined. For example, the target DPF regeneration mileage for purpose 1 is 10,000 km, for purpose 2 it is 3,000 km, for purpose 3 it is 8,000 km, and for purpose 4 it is 2,000 km.

[0056] Furthermore, the steps for determining whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage mainly include: firstly, calculating the ratio of the actual DPF regeneration mileage to the target DPF regeneration mileage, and determining whether the ratio is less than a fourth preset ratio. If so, the DPF regeneration anomaly counter counts once. Then, determining whether the number of counts of the DPF regeneration anomaly counter within a set time is greater than a second preset count. If so, a frequent DPF regeneration warning is issued.

[0057] Furthermore, the fourth preset ratio is no greater than 0.5, the set time ranges from 30 to 40 days, and the second preset count ranges from 2 to 5. Specifically, the vehicle's actual DPF regeneration mileage and target DPF regeneration mileage are compared. If the ratio of the actual DPF regeneration mileage to the target DPF regeneration mileage is less than 0.5, the DPF regeneration anomaly counter is incremented by 1. If the DPF regeneration anomaly counter exceeds the second preset count (e.g., 3, 4, etc.) within the set time (e.g., 30 days, 40 days, etc.), a frequent DPF regeneration warning is issued.

[0058] This application also provides an early warning device for frequent DPF regeneration, which is used to implement the aforementioned early warning method for frequent DPF regeneration, and mainly includes:

[0059] The information acquisition module is used to acquire information on the vehicle's aftertreatment temperature and carbon load changes, as well as the vehicle's operating mileage and target DPF regeneration mileage.

[0060] The information judgment module is used to determine whether the vehicle has undergone DPF regeneration based on the vehicle's after-treatment temperature or based on changes in the vehicle's carbon load.

[0061] The information execution module is used to calculate the actual DPF regeneration mileage of the vehicle based on the recorded operating mileage, and is also used to determine whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage.

[0062] The module settings of the early warning device for frequent DPF regeneration correspond to the steps of the early warning method described above, and will not be elaborated here.

[0063] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0064] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for early warning of frequent DPF regeneration, characterized in that, The steps include: Whether DPF regeneration has occurred can be determined based on the vehicle's aftertreatment temperature or changes in the vehicle's carbon load. If it is determined that the vehicle has undergone DPF regeneration, the current mileage of the vehicle is recorded, and the actual DPF regeneration mileage of the vehicle is calculated based on the recorded mileage. Obtain the target DPF regeneration mileage for the current vehicle, and determine whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage. The steps for determining whether DPF regeneration has occurred in the vehicle based on the vehicle's after-treatment temperature include: Get the temperature data between the current operating point and the operating point a first preset time before the current operating point, determine whether the temperature data is greater than the preset temperature, and if so, get the total high temperature time within the first preset time period that is greater than the preset temperature. Calculate the ratio of the total high-temperature time to the first preset time, and determine whether the ratio is greater than the first preset ratio. If so, the high-temperature counter counts once. Determine whether the count of the high temperature counter is greater than the first preset count; if so, determine that the vehicle has undergone DPF regeneration. The steps for determining whether a vehicle has undergone DPF regeneration based on changes in the vehicle's carbon load include: Obtain carbon load data between the current operating point and the operating point at a second preset time interval prior to the current operating point, determine whether the carbon load is greater than a first preset carbon load, if so, obtain the total high carbon load time within the second preset time interval that is greater than the first preset carbon load, calculate the ratio of the total high carbon load time to the second preset time interval, and determine whether the ratio is greater than the second preset ratio, if so, assign the high carbon load flag to 1; Determine whether the carbon loading is less than the second preset carbon loading. If so, obtain the total low carbon loading time within the second preset time period that is less than the second preset carbon loading, calculate the ratio of the total low carbon loading time to the second preset time, and determine whether the ratio is greater than the third preset ratio. If so, assign the low carbon loading flag to 1. If the high carbon load flag is assigned a value of 1 first, followed by the low carbon load flag being assigned a value of 1, and the time interval between the two is less than the preset time interval, then it is determined that the vehicle has undergone DPF regeneration.

2. The early warning method for frequent DPF regeneration as described in claim 1, characterized in that: The temperature data includes the SCR inlet temperature or the DPF inlet temperature.

3. The early warning method for frequent DPF regeneration as described in claim 1, characterized in that, The steps for calculating the vehicle's actual DPF regeneration mileage based on the recorded operating mileage include: Calculate the difference between the currently recorded mileage and the previously recorded mileage to obtain the actual DPF regeneration mileage of the vehicle when two consecutive DPF regenerations occur.

4. The early warning method for frequent DPF regeneration as described in claim 1, characterized in that, The steps for obtaining the target DPF regeneration mileage of the vehicle include: Obtain vehicle type, road type, and vehicle driving information; Clustering analysis algorithms are used to analyze the vehicle type, road type, and vehicle driving information to obtain the vehicle's application scenario, thereby confirming the target DPF regeneration mileage.

5. The early warning method for frequent DPF regeneration as described in claim 4, characterized in that: The vehicle driving information includes average vehicle speed, idle speed percentage, engine speed, and output torque percentage.

6. The early warning method for frequent DPF regeneration as described in claim 1, characterized in that, The steps for determining whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage include: Calculate the ratio of the actual DPF regeneration mileage to the target DPF regeneration mileage, and determine whether the ratio is less than a fourth preset ratio. If so, the DPF regeneration anomaly counter counts once. Determine whether the number of counts of the DPF regeneration anomaly counter within a set time period is greater than the second preset count. If so, issue a frequent DPF regeneration warning.

7. The early warning method for frequent DPF regeneration as described in claim 6, characterized in that: The value of the fourth preset ratio is no greater than 0.5, and the value of the set time ranges from 30 to 40 days.

8. A warning device for frequent DPF regeneration, used in implementing the warning method for frequent DPF regeneration as described in claim 1, characterized in that, It includes: The information acquisition module is used to acquire information on the vehicle's aftertreatment temperature and carbon load changes, as well as the vehicle's operating mileage and target DPF regeneration mileage. The information judgment module is used to determine whether the vehicle has undergone DPF regeneration based on the vehicle's after-treatment temperature or based on changes in the vehicle's carbon load. The information execution module is used to calculate the actual DPF regeneration mileage of the vehicle based on the recorded operating mileage, and is also used to determine whether to issue a frequent DPF regeneration warning based on the actual DPF regeneration mileage and the target DPF regeneration mileage.

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