Equivalent preparation method, apparatus, vehicle and storage medium for ash samples

Abstract

This application relates to an equivalent preparation method, apparatus, vehicle, and storage medium for ash samples. The method includes: acquiring the ash mass, back pressure data, and a first ash distribution state of a target cross-section from a real vehicle sample to formulate an ash sample; when the ash sample meets the equivalence conditions of the real vehicle sample, performing an ash loading cycle on the ash sample to obtain a second ash distribution state of the target cross-section in the ash sample; and if the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. This solves the problems of long preparation time and high cost in related technologies for ash sample preparation, and the lack of assessment of the equivalence of the ash sample, which affects the performance evaluation and experimental reliability of particulate traps. The method for equivalent preparation of real vehicle ash samples based on burners allows for the production of ash samples equivalent to those from real vehicles in a short time and at a lower cost, thereby improving the performance evaluation of particulate traps.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an equivalent preparation method, apparatus, vehicle, and storage medium for ash samples. Background Technology

[0002] With the development of vehicle intelligence, the control of particulate matter emissions from vehicle exhaust is receiving increasing attention from producers and consumers. In order to meet the emission requirements for particulate matter, gasoline vehicle particulate filters are widely used in particulate pollutant emission control. Among them, ash samples are widely used in engine and vehicle calibration tests.

[0003] In most related technologies, ash samples are prepared through real vehicle durability tests in order to evaluate the performance of gasoline vehicle particulate filters based on the ash samples.

[0004] However, the above-mentioned methods for preparing ash samples are time-consuming and expensive, and do not assess the equivalence of the ash samples, thus affecting the evaluation performance and test reliability of gasoline vehicle particulate traps, which urgently needs to be addressed. Summary of the Invention

[0005] This application provides an equivalent preparation method, apparatus, vehicle, and storage medium for ash samples to solve the problems of long preparation time and high cost of related technologies for ash sample preparation, and the failure to judge the equivalence of ash samples, which affects the evaluation performance and test reliability of particle traps.

[0006] The first aspect of this application provides an equivalent preparation method for an ash sample, comprising the following steps:

[0007] Acquire the ash mass, back pressure data, and first ash distribution state of the target cross section of the actual vehicle sample, and formulate an ash sample based on the ash mass, the back pressure data, and the first ash distribution state;

[0008] Determine whether the ash sample meets the equivalent conditions of the actual vehicle sample;

[0009] If the ash sample satisfies the equivalent conditions of the actual vehicle sample, then an ash loading cycle is performed on the ash sample to obtain the second ash distribution state of the target section in the ash sample. If the ash sample satisfies the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained.

[0010] According to one embodiment of this application, obtaining the ash content mass, back pressure data, and first ash distribution state of the target cross-section of the actual vehicle sample includes:

[0011] The first pressure value at the inlet of the first target carrier and the second pressure value at the outlet of the first target carrier in the actual vehicle sample are measured under preset flow conditions and preset temperature conditions. The pressure difference of the first target carrier is obtained based on the first pressure value and the second pressure value, so as to obtain the back pressure data of the actual vehicle sample according to the pressure difference.

[0012] The first target carrier is dissected and dried with the dissected second target carrier at a preset temperature and within a first preset time. The first target carrier and the second target carrier are weighed within a second preset time to obtain the mass difference between the first target carrier and the second target carrier, so as to obtain the ash mass of the actual vehicle sample based on the mass difference.

[0013] The first target carrier is detected using a preset detection method to obtain the ash distribution state of the first target carrier, and the height of the ash column in the target section of the first target carrier is obtained based on the ash distribution state.

[0014] According to one embodiment of this application, determining whether the ash content sample meets the equivalent conditions of a real vehicle sample includes:

[0015] Determine whether the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and whether the height deviation of each ash column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition.

[0016] If the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, and the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and the height deviation of each gray column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition, then it is determined that the ash content sample meets the equivalent condition of the actual vehicle sample.

[0017] According to one embodiment of this application, the step of performing an ash loading cycle on the ash sample to obtain a second ash distribution state of the target cross-section in the ash sample includes:

[0018] The ash sample is pretreated, and the pretreated ash sample is dried at a preset temperature and within a first preset time. The ash sample is initially weighed within a second preset time to obtain the initial ash mass of the ash sample.

[0019] Based on preset flow rate and preset temperature conditions, the ash sample is subjected to ash loading cycles within a preset interval time, and the initial back pressure value of the ash sample is recorded after each ash loading cycle. At the same time, after each ash loading cycle, the ash sample is purged, and after the ash purging, the ash sample is weighed in stages to obtain the stage ash mass of the ash sample. The mass difference of the ash sample in the current stage is obtained based on the stage ash mass and the initial ash mass.

[0020] The ash sample is detected using a preset detection method to obtain a second ash distribution state of the ash sample. The second ash distribution state is then compared with the first ash distribution state to obtain a detection feedback result of the ash sample. Based on the detection feedback result, the ash loading cycle speed is adjusted within the next preset interval.

[0021] According to one embodiment of this application, the ash sample satisfies the loading cycle termination condition, including:

[0022] Determine whether the stage ash mass of the ash sample meets the first preset deviation condition, whether the initial back pressure value of the ash sample meets the second preset deviation condition, and whether the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition.

[0023] If the ash content quality of the stage meets the first preset deviation condition, the initial back pressure value meets the second preset deviation condition, and the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition, then the ash sample is determined to meet the loading cycle end condition.

[0024] According to the equivalent preparation method of ash samples in this application, the ash mass, back pressure data, and first ash distribution state of the target cross-section of a real vehicle sample are obtained to formulate an ash sample. When the ash sample meets the equivalence conditions of the real vehicle sample, an ash loading cycle is performed on the ash sample to obtain a second ash distribution state of the target cross-section in the ash sample. If the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. This solves the problems of long preparation time and high cost of related technologies for ash sample preparation, and the lack of assessment of the equivalence of the ash sample, which affects the performance evaluation and experimental reliability of particulate traps. The equivalent preparation method of real vehicle ash samples based on burners can produce ash samples equivalent to those of real vehicles in a short time and at a lower cost, thereby improving the performance evaluation of particulate traps.

[0025] A second aspect of this application provides an equivalent preparation apparatus for ash samples, comprising:

[0026] The first acquisition module is used to acquire the ash content mass, back pressure data and the first ash distribution state of the target section of the actual vehicle sample, and to formulate the ash sample based on the ash content mass, the back pressure data and the first ash distribution state;

[0027] The judgment module is used to determine whether the ash sample meets the equivalent conditions of the actual vehicle sample;

[0028] The second acquisition module is used to perform an ash loading cycle on the ash sample if the ash sample meets the equivalent conditions of the actual vehicle sample, to obtain the second ash distribution state of the target section in the ash sample, and to obtain an equivalent ash sample if the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state.

[0029] According to one embodiment of this application, the first acquisition module includes:

[0030] The first acquisition unit is used to measure the first pressure value at the inlet of the first target carrier and the second pressure value at the outlet of the first target carrier in the actual vehicle sample based on preset flow conditions and preset temperature conditions, and to obtain the pressure difference of the first target carrier based on the first pressure value and the second pressure value, so as to obtain the back pressure data of the actual vehicle sample according to the pressure difference.

[0031] The second acquisition unit is used to dissect the first target carrier and dry it with the dissected second target carrier at a preset temperature and a first preset time, and weigh the first target carrier and the second target carrier within a second preset time to obtain the mass difference between the first target carrier and the second target carrier, so as to obtain the ash mass of the actual vehicle sample based on the mass difference.

[0032] The third acquisition unit is used to detect the first target carrier based on a preset detection method, obtain the ash distribution state of the first target carrier, and obtain the ash column height of the target section in the first target carrier based on the ash distribution state.

[0033] According to one embodiment of this application, the determining module includes:

[0034] The first judgment unit is used to determine whether the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and whether the height deviation of each ash column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition.

[0035] The first determination unit is configured to determine that the ash sample meets the equivalent conditions of the actual vehicle sample if the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and the height deviation of each ash column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition.

[0036] According to one embodiment of this application, the second acquisition module includes:

[0037] The fourth acquisition unit is used to pre-treat the ash sample, dry the pre-treated ash sample at a preset temperature and within a first preset time, and initially weigh the ash sample within a second preset time to obtain the initial ash mass of the ash sample.

[0038] The fifth acquisition unit is used to perform ash loading cycles on the ash sample within a preset interval time based on preset flow conditions and preset temperature conditions, and record the initial back pressure value of the ash sample after each ash loading cycle. At the same time, after each ash loading cycle, the ash sample is purged, and after the ash purging, the ash sample is weighed in stages to obtain the stage ash mass of the ash sample. The mass difference of the ash sample in the current stage is obtained based on the stage ash mass and the initial ash mass.

[0039] The adjustment unit is used to detect the ash sample based on a preset detection method, obtain a second ash distribution state of the ash sample, compare the second ash distribution state with the first ash distribution state to obtain the detection feedback result of the ash sample, and adjust the ash loading cycle speed within the next preset interval based on the detection feedback result.

[0040] According to one embodiment of this application, the second acquisition module includes:

[0041] The second judgment unit is used to judge whether the stage ash quality of the ash sample meets the first preset deviation condition, whether the initial back pressure value of the ash sample meets the second preset deviation condition, and whether the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition.

[0042] The second determination unit is used to determine that the ash sample meets the loading cycle end condition if the stage ash quality meets the first preset deviation condition, the initial back pressure value meets the second preset deviation condition, and the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition.

[0043] According to the equivalent preparation apparatus for ash samples in this application, the ash mass, back pressure data, and first ash distribution state of the target cross-section of a real vehicle sample are obtained to formulate an ash sample. When the ash sample meets the equivalence conditions of the real vehicle sample, an ash loading cycle is performed on the ash sample to obtain a second ash distribution state of the target cross-section in the ash sample. If the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. This solves the problems of long preparation time and high cost of related technologies for ash sample preparation, and the lack of assessment of the equivalence of the ash sample, which affects the performance evaluation and experimental reliability of particulate traps. The equivalent preparation method for real vehicle ash samples based on burners can produce ash samples equivalent to those of real vehicles in a short time and at a lower cost, thereby improving the performance evaluation of particulate traps.

[0044] A third aspect of this application provides a vehicle comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement an equivalent preparation method for ash samples as described in the above embodiments.

[0045] A fourth aspect of this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform an equivalent preparation method for an ash sample as described in the above embodiments.

[0046] A fifth aspect of this application provides a computer program product, including a computer program that is executed to implement the equivalent preparation method of ash samples described in the above embodiments.

[0047] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0048] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0049] Figure 1 This is a flowchart illustrating an equivalent preparation method for an ash sample according to an embodiment of this application;

[0050] Figure 2 This is a schematic diagram of the hardware of an experimental system according to an embodiment of this application;

[0051] Figure 3 This is a schematic diagram of the carrier end face partition according to an embodiment of this application;

[0052] Figure 4This is an example diagram of an equivalent preparation apparatus for ash samples according to an embodiment of this application;

[0053] Figure 5 This is a structural schematic diagram of a vehicle according to an embodiment of this application. Detailed Implementation

[0054] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0055] The equivalent preparation method, apparatus, vehicle, and storage medium for ash samples according to embodiments of this application are described below with reference to the accompanying drawings. Addressing the problems mentioned in the background art regarding the time-consuming and costly methods for preparing ash samples, and the lack of assessment of the equivalence of the ash samples, which affects the performance evaluation and reliability of particle traps, this application provides an equivalent preparation method for ash samples. In this method, the ash mass, back pressure data, and first ash distribution state of the target cross-section of a real vehicle sample are obtained to formulate an ash sample. When the ash sample meets the equivalence conditions of the real vehicle sample, an ash loading cycle is performed on the ash sample to obtain a second ash distribution state of the target cross-section in the ash sample. If the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. This solves the problems of long preparation time and high cost of related technologies for ash sample preparation, and the lack of assessment of the equivalence of ash samples, which affects the performance evaluation and test reliability of particulate traps. Based on the equivalent preparation method of ash samples from actual vehicles, ash samples equivalent to those from actual vehicles can be prepared in a short time and at a lower cost, thereby improving the performance evaluation of particulate traps.

[0056] Specifically, Figure 1 This is a schematic flowchart illustrating an equivalent preparation method for an ash sample provided in an embodiment of this application.

[0057] like Figure 1 As shown, the equivalent preparation method of this ash sample includes the following steps:

[0058] In step S101, the ash content, back pressure data and the first ash distribution state of the target section of the actual vehicle sample are obtained, and the ash sample is formulated based on the ash content, back pressure data and the first ash distribution state.

[0059] According to one embodiment of this application, obtaining the ash mass, back pressure data, and first ash distribution state of the target cross section of a real vehicle sample includes: measuring a first pressure value at the inlet of the first target carrier and a second pressure value at the outlet of the first target carrier in the real vehicle sample based on preset flow conditions and preset temperature conditions; obtaining the pressure difference of the first target carrier based on the first pressure value and the second pressure value; obtaining the back pressure data of the real vehicle sample based on the pressure difference; dissecting the first target carrier and drying it together with the dissected second target carrier at a preset temperature and a first preset time; weighing the first target carrier and the second target carrier within a second preset time to obtain the mass difference between the first target carrier and the second target carrier; obtaining the ash mass of the real vehicle sample based on the mass difference; and detecting the first target carrier based on a preset detection method to obtain the ash distribution state of the first target carrier, and obtaining the ash column height of the target cross section in the first target carrier based on the ash distribution state.

[0060] The preset flow rate conditions, preset temperature conditions, and preset detection methods can all be selected by those skilled in the art based on actual preparation needs, and are not specifically limited here.

[0061] Specifically, with the implementation of emission regulations for gasoline vehicles, in order to address particulate matter emission requirements, GPF (Gasoline Particle Filter) has been widely used in particulate pollutant emission control. Ash samples have been widely used in engine and vehicle calibration tests. In development tests, the method of preparing ash samples using actual vehicles is time-consuming, costly, and causes serious damage to engine performance due to long-term mixed combustion. Therefore, this application embodiment uses a burner method to prepare ash samples, so as to obtain test pieces that are equivalent to actual vehicle ash samples in a shorter time and at a lower cost.

[0062] Specifically, such as Figure 2As shown in the embodiments of this application, it is necessary to determine the ash content sample based on the initial conditions of the actual vehicle sample, such as obtaining the ash content mass, back pressure data and the first ash content distribution state of the target section of the actual vehicle sample, and to formulate the ash content sample based on the ash content mass, back pressure data and the first ash content distribution state. First, based on preset flow rate conditions (e.g., 200 kg / h flow rate) and preset temperature conditions (e.g., 700°C), the first target carrier in the actual vehicle sample, i.e., the first pressure value at the inlet of the particulate trap and the second pressure value at its outlet, are measured. This is equivalent to measuring the pressure difference PT (Backpressure) before and after the particulate trap under the conditions of 200 kg / h flow rate and 700°C. Second, the first target carrier is dissected, and the dissected second target carrier (e.g., an ashless particulate trap) is dried at a preset temperature (e.g., 250°C) and a first preset time (e.g., 2 hours). The first and second target carriers are then weighed in a windless environment within a second preset time (e.g., 1 minute), i.e., thermogravimetric analysis, to obtain the mass difference between the first and second target carriers, which is the ash mass of the actual vehicle sample, i.e., the ash loading amount MT (Metric Tonne). Third, as... Figure 3 As shown, the first target carrier is scanned using a preset detection method (e.g., CT (Computed Tomography) scanning method) to obtain the ash distribution state inside the first target carrier, i.e., the ash column height of each hole in the three main cross-sections. The first target carrier is then divided into regions, and an initial ultrasonic ash distribution map, i.e., U, is obtained through ultrasonic detection using an ultrasonic detector. T1 -U Tx The first target carrier end face is divided by marking indelible points on the flange of the first target carrier shell. After the first target carrier area is divided, the area position cannot be changed throughout the entire test process.

[0063] In step S102, it is determined whether the ash sample meets the equivalent conditions of the actual vehicle sample.

[0064] According to one embodiment of this application, determining whether an ash sample meets the equivalent conditions of a real vehicle sample includes: determining whether the ash mass deviation of the real vehicle sample meets a first preset deviation condition, whether the back pressure data deviation of the real vehicle sample meets a second preset deviation condition, and whether the height deviation of each gray column in the first ash distribution state of the real vehicle sample meets a third preset deviation condition; if the ash mass deviation of the real vehicle sample meets the first preset deviation condition, the back pressure data deviation of the real vehicle sample meets the second preset deviation condition, and the height deviation of each gray column in the first ash distribution state of the real vehicle sample meets the third preset deviation condition, then the ash sample is determined to meet the equivalent conditions of a real vehicle sample.

[0065] The first, second, and third preset deviation conditions can all be selected by those skilled in the art based on actual preparation needs, and are not specifically limited here.

[0066] Specifically, the ash mass deviation, back pressure data deviation, and height deviation of each gray column in the first ash distribution state of the actual vehicle sample are obtained. If the ash mass deviation of the actual vehicle sample is (PT±3) kPa, it is determined that the ash mass deviation of the actual vehicle sample meets the first preset deviation condition. If the back pressure data deviation, i.e., the ash mass deviation, of the actual vehicle sample is (MT±1.0) g, it is determined that the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition. After CT scanning, the ash distribution of the three main cross sections is similar. If the first ash distribution state of the actual vehicle sample is similar... If the height deviation of each gray column in the first ash distribution state is within 5 mm, then the height deviation of each gray column in the first ash distribution state of the actual vehicle sample is determined to meet the third preset deviation condition. If the ash mass deviation of the actual vehicle sample is (PT±3) kPa and the ash mass deviation is (MT±1.0) g, and the height deviation of each gray column in the first ash distribution state of the actual vehicle sample is within 5 mm, then the ultrasonic detection feedback value of each region of the first target carrier is used as the reference value for the ash loading test, that is, the ash sample is determined to meet the equivalent condition of the actual vehicle sample, so as to adjust the ash loading speed in the process.

[0067] In step S103, if the ash sample meets the equivalent conditions of the actual vehicle sample, then the ash sample is subjected to an ash loading cycle to obtain the second ash distribution state of the target section in the ash sample. If the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained.

[0068] According to one embodiment of this application, an ash loading cycle is performed on an ash sample to obtain a second ash distribution state of a target cross-section in the ash sample. This includes: pre-treating the ash sample, drying the pre-treated ash sample at a preset temperature and within a first preset time, and initially weighing the ash sample within a second preset time to obtain the initial ash mass of the ash sample; performing ash loading cycles on the ash sample at preset intervals based on preset flow rate and preset temperature conditions, and recording the initial back pressure value of the ash sample after each ash loading cycle. After the loading cycle is completed, the ash sample is purged, and then weighed in stages to obtain the stage ash mass. The mass difference of the ash sample in the current stage is obtained based on the stage ash mass and the initial ash mass. The ash sample is then probed based on a preset detection method to obtain the second ash distribution state of the ash sample. The second ash distribution state is compared with the first ash distribution state to obtain the detection feedback result of the ash sample. Based on the detection feedback result, the ash loading cycle speed is adjusted in the next preset interval.

[0069] According to one embodiment of this application, the ash sample satisfies the loading cycle termination condition, including: determining whether the stage ash mass of the ash sample satisfies a first preset deviation condition, whether the initial back pressure value of the ash sample satisfies a second preset deviation condition, and whether the height deviation of each ash column in the second ash distribution state of the ash sample satisfies a third preset deviation condition; if the stage ash mass satisfies the first preset deviation condition, the initial back pressure value satisfies the second preset deviation condition, and the height deviation of each ash column in the second ash distribution state of the ash sample satisfies the third preset deviation condition, then it is determined that the ash sample satisfies the loading cycle termination condition.

[0070] The preset interval time can be selected by those skilled in the art based on actual preparation needs, and is not specifically limited here.

[0071] Specifically, if the ash sample meets the equivalent conditions of the actual vehicle sample, the ash sample is subjected to ash loading cycle, including pretreatment, initial weighing, ash loading, ash purging, stage weighing, ultrasonic detection and other steps. The test sample selected for the loading test is consistent with the pipeline state of the vehicle sample. The inlet of the first target carrier needs to be made detachable so as to carry out ultrasonic detection.

[0072] Specifically, firstly, the ash samples are pretreated under an airflow of 200 kg / h and 800°C for 4 hours to remove unstable factors from components such as the metal casing and gaskets, ensuring that the ash samples are free from other factors affecting their quality in subsequent tests, besides the influence of ash content. Secondly, the pretreated ash samples are dried in an oven at 250°C for 2 hours, and then initially weighed within 1 minute in a windless environment, i.e., the thermogravimetric analysis is performed to obtain the initial ash mass. Thirdly, the ash is loaded into a circulating diesel burner, using a blend of engine oil and diesel fuel, based on preset temperature conditions (the first target carrier inlet temperature of 700°C) and preset flow conditions (exhaust flow rate of 20... At a speed of 0 kg / h, the oil injection rate is 50-80 ml per hour. Ash loading cycles are performed within a preset interval (e.g., 20 h), and the initial back pressure value Pn of each loading stage is recorded. Finally, after every 20 hours of loading, the ash sample is purged for 1 hour. The ash purging conditions are: inlet temperature of the first target carrier 700℃, exhaust flow rate 500 kg / h, no oil is injected during the purging process, and the ash sample is weighed in stages after ash purging. The weighing conditions are the same as the initial weighing conditions, that is, the ash sample is dried in an oven at 250℃ for 2 h, and the thermogravimetric analysis is recorded as Mn in a windless environment within 1 minute to obtain the stage ash mass of the ash sample. The mass difference of the ash sample at the current stage is obtained based on the stage ash mass and the initial ash mass.

[0073] Furthermore, after each test weighing, ultrasonic testing was performed on each region of the inlet at the end face of the first target carrier to obtain ultrasonic feedback values ​​Un1-Unx, which were then compared with U T1 -U Tx By comparing the changes in ultrasonic feedback values ​​and the changes in back pressure, the ash loading cycle speed for the next stage is adjusted. This is mainly achieved by adjusting the oil injection speed, thereby controlling the rate of ash column formation.

[0074] Furthermore, in this embodiment of the application, it is necessary to determine whether the stage ash mass of the ash sample meets the first preset deviation condition, whether the initial back pressure value of the ash sample meets the second preset deviation condition, and whether the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition. If the stage ash mass Mn of the ash sample reaches (MT±1.0)g, and the initial back pressure value Pn of the ash sample, i.e., the ash mass deviation, is within the range of (PT±3)kPa, and the height deviation of each ash column in the second ash distribution state of the ash sample is within 5mm, then it is determined that the ash sample meets the loading cycle termination condition, the test is stopped, and an equivalent ash sample is obtained.

[0075] Therefore, based on the specific discussion of the above embodiments, the following beneficial effects can be obtained:

[0076] (1) The method for preparing equivalent ash samples of gasoline vehicle particulate traps based on burners in this application embodiment can produce ash samples equivalent to those of real vehicles in a short time and at a low cost;

[0077] (2) Based on the fact that this method is faster and saves a lot of test costs, it is of great significance to the research and development and product selection of particulate matter emissions of vehicles. At the same time, it can also serve as an effective supplement to the existing gap in the preparation method of equivalent real vehicle parts of GPF.

[0078] According to the equivalent preparation method of ash samples in this application, the ash mass, back pressure data, and first ash distribution state of the target cross-section of a real vehicle sample are obtained to formulate an ash sample. When the ash sample meets the equivalence conditions of the real vehicle sample, an ash loading cycle is performed on the ash sample to obtain a second ash distribution state of the target cross-section in the ash sample. If the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. This solves the problems of long preparation time and high cost of related technologies for ash sample preparation, and the lack of assessment of the equivalence of the ash sample, which affects the performance evaluation and experimental reliability of particulate traps. The equivalent preparation method of real vehicle ash samples based on burners can produce ash samples equivalent to those of real vehicles in a short time and at a lower cost, thereby improving the performance evaluation of particulate traps.

[0079] Next, with reference to the accompanying drawings, an equivalent preparation apparatus for ash samples according to an embodiment of this application is described.

[0080] Figure 4 This is a block diagram of an equivalent preparation apparatus for ash samples according to an embodiment of this application.

[0081] like Figure 4 As shown, the equivalent preparation device 10 for the ash sample includes: a first acquisition module 100, a judgment module 200, and a second acquisition module 300.

[0082] The first acquisition module 100 is used to acquire the ash content, back pressure data and the first ash distribution state of the target section of the actual vehicle sample, and to formulate the ash sample based on the ash content, back pressure data and the first ash distribution state.

[0083] The judgment module 200 is used to determine whether the ash content sample meets the equivalent conditions of the actual vehicle sample;

[0084] The second acquisition module 300 is used to perform an ash loading cycle on the ash sample if the ash sample meets the equivalent conditions of the actual vehicle sample, to obtain the second ash distribution state of the target section in the ash sample, and to obtain an equivalent ash sample if the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state.

[0085] According to one embodiment of this application, the first acquisition module 100 includes:

[0086] The first acquisition unit is used to measure the first pressure value at the inlet of the first target carrier and the second pressure value at the outlet of the first target carrier in the actual vehicle sample based on preset flow conditions and preset temperature conditions, and to obtain the pressure difference of the first target carrier based on the first pressure value and the second pressure value, so as to obtain the back pressure data of the actual vehicle sample according to the pressure difference.

[0087] The second acquisition unit is used to dissect the first target carrier and dry it with the dissected second target carrier at a preset temperature and a first preset time, and weigh the first target carrier and the second target carrier within a second preset time to obtain the mass difference between the first target carrier and the second target carrier, so as to obtain the ash mass of the actual vehicle sample based on the mass difference.

[0088] The third acquisition unit is used to detect the first target carrier based on a preset detection method, obtain the ash distribution state of the first target carrier, and obtain the ash column height of the target section in the first target carrier based on the ash distribution state.

[0089] According to one embodiment of this application, the determination module 200 includes:

[0090] The first judgment unit is used to judge whether the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and whether the height deviation of each ash column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition.

[0091] The first determination unit is used to determine that the ash sample meets the equivalent conditions of the actual vehicle sample if the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and the height deviation of each ash column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition.

[0092] According to one embodiment of this application, the second acquisition module 300 includes:

[0093] The fourth acquisition unit is used to pre-treat the ash sample, dry the pre-treated ash sample at a preset temperature and within a first preset time, and initially weigh the ash sample within a second preset time to obtain the initial ash mass of the ash sample.

[0094] The fifth acquisition unit is used to perform ash loading cycles on the ash sample within a preset interval based on preset flow conditions and preset temperature conditions, and to record the initial back pressure value of the ash sample after each ash loading cycle. At the same time, after each ash loading cycle, the ash sample is purged, and after the ash purging, the ash sample is weighed in stages to obtain the stage ash mass of the ash sample. The mass difference of the ash sample in the current stage is obtained based on the stage ash mass and the initial ash mass.

[0095] The adjustment unit is used to detect the ash sample based on a preset detection method, obtain the second ash distribution state of the ash sample, compare the second ash distribution state with the first ash distribution state to obtain the detection feedback result of the ash sample, and adjust the ash loading cycle speed in the next preset interval based on the detection feedback result.

[0096] According to one embodiment of this application, the second acquisition module 300 includes:

[0097] The second judgment unit is used to judge whether the stage ash quality of the ash sample meets the first preset deviation condition, whether the initial back pressure value of the ash sample meets the second preset deviation condition, and whether the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition.

[0098] The second determination unit is used to determine that the ash sample meets the loading cycle termination condition if the stage ash quality meets the first preset deviation condition, the initial back pressure value meets the second preset deviation condition, and the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition.

[0099] According to the equivalent preparation apparatus for ash samples in this application, the ash mass, back pressure data, and first ash distribution state of the target cross-section of a real vehicle sample are obtained to formulate an ash sample. When the ash sample meets the equivalence conditions of the real vehicle sample, an ash loading cycle is performed on the ash sample to obtain a second ash distribution state of the target cross-section in the ash sample. If the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. This solves the problems of long preparation time and high cost of related technologies for ash sample preparation, and the lack of assessment of the equivalence of the ash sample, which affects the performance evaluation and experimental reliability of particulate traps. The equivalent preparation method for real vehicle ash samples based on burners can produce ash samples equivalent to those of real vehicles in a short time and at a lower cost, thereby improving the performance evaluation of particulate traps.

[0100] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include:

[0101] The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0102] When the processor 502 executes the program, it implements the equivalent preparation method of the ash sample provided in the above embodiments.

[0103] Furthermore, the vehicle also includes:

[0104] Communication interface 503 is used for communication between memory 501 and processor 502.

[0105] The memory 501 is used to store computer programs that can run on the processor 502.

[0106] The memory 501 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0107] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0108] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0109] Processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0110] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the equivalent preparation method of the ash sample as described above.

[0111] This embodiment also provides a computer program product, including a computer program, which is executed to implement the equivalent preparation method of the ash sample in the above embodiment.

[0112] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0113] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0114] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0115] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0116] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0117] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

[0118] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0119] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. An equivalent preparation method for ash samples, characterized in that, Includes the following steps: Acquire the ash mass, back pressure data, and first ash distribution state of the target cross section of the actual vehicle sample, and formulate an ash sample based on the ash mass, the back pressure data, and the first ash distribution state; Determine whether the ash sample meets the equivalent conditions of the actual vehicle sample; If the ash sample satisfies the equivalent conditions of the actual vehicle sample, then an ash loading cycle is performed on the ash sample to obtain the second ash distribution state of the target section in the ash sample. If the ash sample satisfies the loading cycle termination condition and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained.

2. The method according to claim 1, characterized in that, The acquisition of ash mass, back pressure data, and the first ash distribution state of the target cross section of the actual vehicle sample includes: The first pressure value at the inlet of the first target carrier and the second pressure value at the outlet of the first target carrier in the actual vehicle sample are measured under preset flow conditions and preset temperature conditions. The pressure difference of the first target carrier is obtained based on the first pressure value and the second pressure value, so as to obtain the back pressure data of the actual vehicle sample according to the pressure difference. The first target carrier is dissected and dried with the dissected second target carrier at a preset temperature and within a first preset time. The first target carrier and the second target carrier are weighed within a second preset time to obtain the mass difference between the first target carrier and the second target carrier, so as to obtain the ash mass of the actual vehicle sample based on the mass difference. The first target carrier is detected using a preset detection method to obtain the ash distribution state of the first target carrier, and the height of the ash column in the target section of the first target carrier is obtained based on the ash distribution state.

3. The method according to claim 1, characterized in that, The determination of whether the ash sample meets the equivalence conditions of the actual vehicle sample includes: Determine whether the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and whether the height deviation of each ash column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition. If the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, and the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and the height deviation of each gray column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition, then it is determined that the ash content sample meets the equivalent condition of the actual vehicle sample.

4. The method according to claim 1, characterized in that, The step of performing an ash loading cycle on the ash sample to obtain the second ash distribution state of the target cross-section in the ash sample includes: The ash sample is pretreated, and the pretreated ash sample is dried at a preset temperature and within a first preset time. The ash sample is initially weighed within a second preset time to obtain the initial ash mass of the ash sample. Based on preset flow rate and preset temperature conditions, the ash sample is subjected to ash loading cycles within a preset interval time, and the initial back pressure value of the ash sample is recorded after each ash loading cycle. At the same time, after each ash loading cycle, the ash sample is purged, and after the ash purging, the ash sample is weighed in stages to obtain the stage ash mass of the ash sample. The mass difference of the ash sample in the current stage is obtained based on the stage ash mass and the initial ash mass. The ash sample is detected using a preset detection method to obtain a second ash distribution state of the ash sample. The second ash distribution state is then compared with the first ash distribution state to obtain a detection feedback result of the ash sample. Based on the detection feedback result, the ash loading cycle speed is adjusted within the next preset interval.

5. The method according to claim 1, characterized in that, The ash sample satisfies the loading cycle termination condition, including: Determine whether the stage ash mass of the ash sample meets the first preset deviation condition, whether the initial back pressure value of the ash sample meets the second preset deviation condition, and whether the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition. If the ash content quality of the stage meets the first preset deviation condition, the initial back pressure value meets the second preset deviation condition, and the height deviation of each ash column in the second ash distribution state of the ash sample meets the third preset deviation condition, then the ash sample is determined to meet the loading cycle end condition.

6. An equivalent preparation apparatus for ash samples, characterized in that, include: The first acquisition module is used to acquire the ash content mass, back pressure data and the first ash distribution state of the target section of the actual vehicle sample, and to formulate the ash sample based on the ash content mass, the back pressure data and the first ash distribution state; The judgment module is used to determine whether the ash sample meets the equivalent conditions of the actual vehicle sample; The second acquisition module is used to perform an ash loading cycle on the ash sample if the ash sample meets the equivalent conditions of the actual vehicle sample, to obtain the second ash distribution state of the target section in the ash sample, and to obtain an equivalent ash sample if the ash sample meets the loading cycle termination condition and the second ash distribution state matches the first ash distribution state.

7. The apparatus according to claim 6, characterized in that, The first acquisition module includes: The first acquisition unit is used to measure the first pressure value at the inlet of the first target carrier and the second pressure value at the outlet of the first target carrier in the actual vehicle sample based on preset flow conditions and preset temperature conditions, and to obtain the pressure difference of the first target carrier based on the first pressure value and the second pressure value, so as to obtain the back pressure data of the actual vehicle sample according to the pressure difference. The second acquisition unit is used to dissect the first target carrier and dry it with the dissected second target carrier at a preset temperature and a first preset time, and weigh the first target carrier and the second target carrier within a second preset time to obtain the mass difference between the first target carrier and the second target carrier, so as to obtain the ash mass of the actual vehicle sample based on the mass difference. The third acquisition unit is used to detect the first target carrier based on a preset detection method, obtain the ash distribution state of the first target carrier, and obtain the ash column height of the target section in the first target carrier based on the ash distribution state.

8. The apparatus according to claim 6, characterized in that, The judgment module includes: The first judgment unit is used to determine whether the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and whether the height deviation of each ash column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition. The first determination unit is configured to determine that the ash sample meets the equivalent conditions of the actual vehicle sample if the ash content quality deviation of the actual vehicle sample meets the first preset deviation condition, the back pressure data deviation of the actual vehicle sample meets the second preset deviation condition, and the height deviation of each ash column in the first ash content distribution state of the actual vehicle sample meets the third preset deviation condition.

9. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement an equivalent preparation method for an ash sample as described in any one of claims 1-5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the equivalent preparation method of the ash sample as described in any one of claims 1-5.

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