Equivalent preparation method and device of ash sample piece, vehicle and storage medium

Abstract

The invention relates to an equivalent preparation method and device of an ash content sample piece, a vehicle and a storage medium, and the method comprises the steps: obtaining the ash content mass and back pressure data of a real vehicle sample piece and a first ash content distribution state of a target section so as to formulate the ash content sample piece, and when the ash content sample piece meets the equivalent condition of the real vehicle sample piece, carrying out ash content loading circulation on the ash content sample piece, and obtaining a second ash content distribution state of the target section in the ash content sample, and obtaining an equivalent ash content sample if the ash content sample meets a loading cycle end condition and the second ash content distribution state is matched with the first ash content distribution state. Therefore, the problems of long time, high cost and influence on evaluation performance and test reliability of a particulate filter due to the fact that equivalence of the ash sample piece is not judged in a method for preparing the ash sample piece in the prior art are solved, and the real vehicle ash sample piece equivalent preparation method based on the combustor has the advantages that the method is simple and convenient to operate and high in practicability. And an ash sample equivalent to a real vehicle is manufactured in a short time and at a low cost, so that the performance evaluation of the particulate filter is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an equivalent preparation method, device, vehicle and storage medium for an ash sample. Background Art

[0002] With the development of intelligent vehicles, the emission control of vehicle exhaust particulate matter has received more and more attention from producers and consumers. In order to meet the emission requirements of 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 the related art, most of the ash samples are prepared by real vehicle durability tests, so as to evaluate the performance of the particulate filter of gasoline vehicles based on the ash samples.

[0004] However, the above method of preparing ash samples is time-consuming and costly, and the equivalence of the ash samples is not judged, which affects the evaluation performance and test reliability of gasoline vehicle particulate filters and needs to be solved urgently. Summary of the invention

[0005] The present application provides an equivalent preparation method, device, vehicle and storage medium for an ash sample to solve the problems that the method for preparing ash samples in the related art is time-consuming and costly, and the equivalence of the ash samples is not judged, thereby affecting the evaluation performance of the particle collector and the reliability of the test.

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

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

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

[0009] If the ash sample meets the equivalent conditions of the actual 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 end conditions and when the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained.

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

[0011] Measuring a first pressure value at an inlet of a first target carrier and a second pressure value at an outlet of the first target carrier in the actual vehicle sample under a preset flow condition and a preset temperature condition, obtaining a pressure difference of the first target carrier based on the first pressure value and the second pressure value, so as to obtain back pressure data of the actual vehicle sample according to the pressure difference;

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

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

[0014] According to an embodiment of the present application, the determining whether the ash sample meets the equivalent condition of the actual vehicle sample includes:

[0015] Determine whether the ash mass deviation of the actual vehicle sample satisfies a first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample satisfies a second preset deviation condition, and whether the height deviation of each ash column in the first ash distribution state of the actual vehicle sample satisfies a third preset deviation condition;

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

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

[0018] 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 an initial ash mass of the ash sample;

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

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

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

[0022] Determine 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;

[0023] If the ash mass in the stage 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, it is determined that the ash sample satisfies the loading cycle end condition.

[0024] According to the equivalent preparation method of the ash sample of the embodiment of the present application, the ash mass, back pressure data and the first ash distribution state of the target cross section of the actual vehicle sample are obtained to formulate the ash sample. When the ash sample meets the equivalent conditions of the actual vehicle sample, the ash sample is subjected to an ash loading cycle to obtain the second ash distribution state of the target cross section in the ash sample. If the ash sample meets the end conditions of the loading cycle and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. Thus, the problems of the method for preparing ash samples in the related art, which is time-consuming and expensive, and the equivalence of the ash samples is not judged, thereby affecting the evaluation performance and test reliability of the particle collector, are solved. Based on the equivalent preparation method of the actual vehicle ash sample of the burner, an ash sample equivalent to the actual vehicle is produced in a short time and at a lower cost, thereby improving the performance evaluation of the particle collector.

[0025] The second aspect of the present application provides an equivalent preparation device for an ash sample, comprising:

[0026] A first acquisition module is used to acquire the ash mass, back pressure data and a first ash distribution state of a target cross section of a real vehicle sample, and formulate an ash sample based on the ash mass, the back pressure data and the first ash distribution state;

[0027] A judgment module, used to judge whether the ash sample meets the equivalent conditions of the real 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 a second ash distribution state of the target cross section in the ash sample; if the ash sample meets the loading cycle end conditions and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained.

[0029] According to an embodiment of the present application, the first acquisition module includes:

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

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

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

[0033] According to an embodiment of the present application, the judgment module includes:

[0034] a first judgment unit, configured to judge whether the ash mass deviation of the actual vehicle sample satisfies a first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample satisfies a second preset deviation condition, and whether the height deviation of each ash column in the first ash distribution state of the actual vehicle sample satisfies a third preset deviation condition;

[0035] The first judgment unit is used to determine that the ash sample meets the equivalent condition of the actual vehicle sample if the ash mass 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 distribution state of the actual vehicle sample meets the third preset deviation condition.

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

[0037] a fourth acquisition unit, configured 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 an initial ash mass of the ash sample;

[0038] a fifth acquisition unit, for performing an ash loading cycle on the ash sample within a preset interval based on a preset flow condition and a preset temperature condition, and recording an initial back pressure value of the ash sample after each ash loading cycle, and performing an ash purge on the ash sample after each ash loading cycle, and performing a stage weighing on the ash sample after the ash purge to obtain a stage ash mass of the ash sample, and obtaining a mass difference of the ash sample at the current stage according to the stage ash mass and the initial ash mass;

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

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

[0041] a second judgment unit, configured to judge 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;

[0042] The second determination unit is used to determine that the ash sample meets the loading cycle end condition if the ash mass in 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.

[0043] According to the equivalent preparation device of the ash sample of the embodiment of the present application, the ash mass, back pressure data and the first ash distribution state of the target cross section of the actual vehicle sample are obtained to formulate the ash sample. When the ash sample meets the equivalent conditions of the actual vehicle sample, the ash sample is subjected to an ash loading cycle to obtain the second ash distribution state of the target cross section in the ash sample. If the ash sample meets the end conditions of the loading cycle and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. Thus, the problems of the method for preparing ash samples in the related art, which is time-consuming and expensive, and the equivalence of the ash samples is not judged, thereby affecting the evaluation performance and test reliability of the particle collector, are solved. Based on the equivalent preparation method of the actual vehicle ash sample of the burner, an ash sample equivalent to the actual vehicle is produced in a short time and at a lower cost, thereby improving the performance evaluation of the particle collector.

[0044] The third aspect of the present 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 embodiment.

[0045] The fourth aspect of the present application provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the equivalent preparation method of the ash sample as described in the above embodiment.

[0046] The fifth aspect of the present application provides a computer program product, including a computer program, which is executed to implement the equivalent preparation method of the ash sample described in the above embodiment.

[0047] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0049] Figure 1 A flowchart of an equivalent preparation method of an ash sample provided according to an embodiment of the present application;

[0050] Figure 2 A hardware schematic diagram of a test system according to an embodiment of the present application;

[0051] Figure 3 This is a schematic diagram of the end surface partitioning of a carrier according to an embodiment of the present application;

[0052] Figure 4is an exemplary diagram of an equivalent preparation device for ash samples according to an embodiment of the present application;

[0053] Figure 5 It is a schematic diagram of the structure of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

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

[0055] The following describes the equivalent preparation method, device, vehicle and storage medium of the ash sample of the embodiment of the present application with reference to the accompanying drawings. In view of the problem that the method for preparing ash samples in the related art mentioned in the above background technology is time-consuming and expensive, and the equivalence of the ash samples is not judged, thereby affecting the evaluation performance and test reliability of the particle collector, the present application provides an equivalent preparation method for ash samples, in which the ash mass, back pressure data and the first ash distribution state of the target cross section of the actual vehicle sample are obtained to formulate the ash sample, and when the ash sample meets the equivalent conditions of the actual vehicle sample, the ash sample is subjected to an ash loading cycle to obtain the second ash distribution state of the target cross section in the ash sample, and if the ash sample meets the loading cycle end conditions, and when the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. Thereby, the problems of the related art method of preparing ash samples, which is time-consuming and costly, and does not judge the equivalence of the ash samples, thus affecting the evaluation performance of the particulate filter and the reliability of the test, are solved. Based on the equivalent preparation method of the real vehicle ash sample of the burner, ash samples equivalent to the real vehicle are produced in a short time and at a lower cost, thereby improving the performance evaluation of the particulate filter.

[0056] Specifically, Figure 1 A schematic diagram of a process for an equivalent preparation method of an ash sample provided in an embodiment of the present application.

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

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

[0059] According to one embodiment of the present application, the ash mass, back pressure data and first ash distribution state of the target cross section of the actual vehicle sample are obtained, including: 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 actual vehicle sample under preset flow conditions and preset temperature conditions, and obtaining a 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; dissecting the first target carrier, and drying it with the dissected second target carrier at a preset temperature and within a first preset time, and weighing the first target carrier and the second target carrier within a second preset time to obtain a mass difference between the first target carrier and the second target carrier, so as to obtain the ash mass of the actual vehicle sample according to the mass difference; 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] Among them, the preset flow conditions, preset temperature conditions and preset detection methods can all be selected by technical personnel in this field according to actual preparation requirements and are not specifically limited here.

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

[0062] Specifically, if Figure 2As shown, in an embodiment of the present application, it is necessary to base the initial condition of the ash sample on the actual vehicle sample, for example, obtain the ash mass, back pressure data and the first ash distribution state of the target cross-section of the actual vehicle sample, and formulate an ash sample based on the ash mass, back pressure data and the first ash distribution state. First, based on the preset flow condition (e.g., 200kg / h flow) and the preset temperature condition (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 collector and the second pressure value at its outlet are measured, i.e., the pressure difference PT (Backpressure) before and after the particulate collector is measured under the conditions of 200kg / h flow and 700°C temperature; secondly, the first target carrier is dissected, and it is dried together with the dissected second target carrier (e.g., ash-free particulate collector) at a preset temperature (e.g., 250°C) and a first preset time (e.g., 2h), and the first target carrier and the second target carrier are weighed in a windless environment within a second preset time (e.g., 1min), i.e., thermogravimetry, so as to obtain the mass difference between the first target carrier and the second target carrier, i.e., the ash mass of the actual vehicle sample, i.e., the ash loading MT (Metric Tonne); thirdly, as Figure 3 As shown, based on a preset detection method (such as a CT (Computed Tomography) scanning method), the first target carrier is detected and scanned to obtain the ash distribution state inside the first target carrier, that is, the ash column height of each hole in the three main cross-sections, and the first target carrier is divided into regions, and an ultrasonic detector is used to perform ultrasonic detection to obtain an initial ultrasonic ash distribution map, that is, U T1 -U Tx The end face of the first target carrier is divided by marking indelible points on the first target carrier housing flange. After the first target carrier area is divided, the area position cannot be changed during 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 the present application, determining whether an ash sample satisfies the equivalent conditions of an actual vehicle sample includes: determining whether the ash mass deviation of the actual vehicle sample satisfies a first preset deviation condition, and whether the back pressure data deviation of the actual vehicle sample satisfies a second preset deviation condition, and whether the height deviations of each ash column in the first ash distribution state of the actual vehicle sample satisfies a third preset deviation condition; if the ash mass deviation of the actual vehicle sample satisfies the first preset deviation condition, and the back pressure data deviation of the actual vehicle sample satisfies the second preset deviation condition, and the height deviations of each ash column in the first ash distribution state of the actual vehicle sample satisfies the third preset deviation condition, then it is determined that the ash sample satisfies the equivalent conditions of the actual vehicle sample.

[0065] Among them, the first preset deviation condition, the second preset deviation condition and the third preset deviation condition can all be selected by technical personnel in this field according to actual preparation requirements, and are not specifically limited here.

[0066] Specifically, the ash mass deviation of the actual vehicle sample, the back pressure data deviation of the actual vehicle sample, and the height deviation of each ash 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 of the actual vehicle sample, that is, the ash mass deviation, 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. The ash distributions of the three main cross sections after CT scanning are similar. If the first ash distribution state of the actual vehicle sample is If the height deviation of each ash column in the state is within 5mm, then it is judged that the height deviation of each ash column in the first ash distribution state of the actual vehicle sample meets 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 ash column in the first ash distribution state of the actual vehicle sample is within 5mm, then the ultrasonic detection feedback value of each area of ​​the first target carrier is used as the reference value of the ash loading test, that is, it is judged that the ash sample meets the equivalent conditions of the actual vehicle sample, so as to adjust the process ash loading speed.

[0067] In step S103, if the ash sample meets the equivalent conditions of the actual 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 end conditions and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained.

[0068] According to one embodiment of the present 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, including: 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 an initial ash mass of the ash sample; performing an ash loading cycle on the ash sample within a preset interval time based on preset flow conditions and preset temperature conditions, and recording an initial back pressure value of the ash sample after each ash loading cycle, 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 for ash, and after the ash purging, the ash sample is weighed in stages to obtain the stage ash mass of the ash sample, and the mass difference of the ash sample in the current stage is obtained according to the stage ash mass and the initial ash mass; the ash sample is detected based on a preset detection method to obtain a second ash distribution state of the ash sample, and the second ash distribution state is compared with the first ash distribution state to obtain a detection feedback result of the ash sample, and the ash loading cycle speed within the next preset interval time is adjusted based on the detection feedback result.

[0069] According to one embodiment of the present application, the ash sample satisfies the loading cycle end condition, including: judging whether the stage ash mass of the ash sample satisfies the first preset deviation condition, and whether the initial back pressure value of the ash sample satisfies the second preset deviation condition, and whether the height deviation of each ash column in the second ash distribution state of the ash sample satisfies the third preset deviation condition; if the stage ash mass satisfies the first preset deviation condition, and 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 end condition.

[0070] The preset interval time can be selected by those skilled in the art according to actual preparation requirements and is not specifically limited here.

[0071] Specifically, if the ash sample meets the equivalent conditions of the actual vehicle sample, an ash loading cycle is performed on the ash sample, 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 status of the whole vehicle sample, and the inlet of the first target carrier needs to be made detachable to facilitate ultrasonic detection.

[0072] Specifically, first, the ash samples were pretreated, that is, the ash samples were pretreated under air flow conditions of 200 kg / h flow rate and 800°C temperature for 4 hours to remove unstable factors in metal shells, gaskets and other components, so that the ash samples had no other factors affecting the quality change except the ash effect in subsequent tests; secondly, the pretreated ash samples were dried in an oven at 250°C for 2 hours, and the ash samples were initially weighed in a windless environment within 1 minute, that is, the ash samples were weighed thermally to obtain the initial ash mass of the ash samples; thirdly, the ash loading cycle used a diesel burner in the form of blending engine oil and diesel, based on the preset temperature conditions, that is, the first target carrier inlet temperature of 700°C, and the preset flow conditions, that is, the exhaust flow rate of 20 0kg / h, the oil injection amount per hour is (50-80) ml, and the ash loading cycle is performed within the preset interval time (for example, 20h), and the initial back pressure value Pn of each loading section is recorded; finally, after every 20 hours of loading, the ash sample is purged for 1 hour, and the ash purging conditions are: the inlet temperature of the first target carrier is 700℃, the exhaust flow rate is 500kg / h, and no oil is injected during the purging process. After the ash sample is purged, the ash sample is weighed in stages, and the weighing conditions are the same as the initial weighing conditions, that is, the ash sample is dried in an oven at 250℃ for 2h, and the thermogravimetric weighing within 1min in a windless environment is recorded as Mn, and the stage ash mass of the ash sample is obtained, so as to obtain the mass difference of the ash sample at the current stage according to the stage ash mass and the initial ash mass.

[0073] Furthermore, after each test weighing is completed, ultrasonic detection is performed on each area of ​​the first target carrier end surface entrance to obtain ultrasonic feedback values ​​Un1-Unx and compare them with U T1 -U Tx For comparison, according to the changing trend of the ultrasonic feedback value and the change of the back pressure, the ash loading cycle speed of the next stage is adjusted, mainly by adjusting the injection speed of the engine oil, so as to control the speed of ash column formation.

[0074] Furthermore, the embodiment of the present application needs to determine whether the stage ash mass of the ash sample satisfies the first preset deviation condition, and whether the initial back pressure value of the ash sample satisfies the second preset deviation condition, and whether the height deviation of each ash column in the second ash distribution state of the ash sample satisfies 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, that is, 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 5 mm, then it is determined that the ash sample meets the loading cycle end 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 equivalent preparation method of the actual vehicle ash sample of the gasoline vehicle particulate filter based on the burner in the embodiment of the present application can produce an ash sample equivalent to the actual vehicle in a short time and at a low cost;

[0077] (2) This method is faster and saves a lot of test costs, which is of great significance to the research and development of vehicle particulate matter emissions and product selection. At the same time, it can also serve as an effective supplement to the existing GPF equivalent vehicle sample preparation method.

[0078] According to the equivalent preparation method of the ash sample of the embodiment of the present application, the ash mass, back pressure data and the first ash distribution state of the target cross section of the actual vehicle sample are obtained to formulate the ash sample. When the ash sample meets the equivalent conditions of the actual vehicle sample, the ash sample is subjected to an ash loading cycle to obtain the second ash distribution state of the target cross section in the ash sample. If the ash sample meets the end conditions of the loading cycle and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. Thus, the problems of the method for preparing ash samples in the related art, which is time-consuming and expensive, and the equivalence of the ash samples is not judged, thereby affecting the evaluation performance and test reliability of the particle collector, are solved. Based on the equivalent preparation method of the actual vehicle ash sample of the burner, an ash sample equivalent to the actual vehicle is produced in a short time and at a lower cost, thereby improving the performance evaluation of the particle collector.

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

[0080] Figure 4 It is a block diagram of an equivalent preparation device for ash samples according to an embodiment of the present 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 mass, back pressure data and the first ash distribution state of the target cross section of the actual vehicle sample, and formulate the ash sample based on the ash mass, back pressure data and the first ash distribution state;

[0083] A judgment module 200 is used to judge whether the ash sample meets the equivalent conditions of the real 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, and obtain a second ash distribution state of the target cross section in the ash sample. If the ash sample meets the loading cycle end conditions and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained.

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

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

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

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

[0089] According to an embodiment of the present application, the determination module 200 includes:

[0090] A first judgment unit is used to judge whether the ash mass 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 distribution state of the actual vehicle sample meets the third preset deviation condition;

[0091] The first judgment unit is used to judge that the ash mass deviation of the actual vehicle sample meets the equivalent condition of the actual vehicle sample if the ash mass 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 distribution state of the actual vehicle sample meets the third preset deviation condition.

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

[0093] a fourth acquisition unit, configured 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 an initial ash mass of the ash sample;

[0094] A fifth acquisition unit is used to perform an ash loading cycle on the ash sample within a preset interval based on a preset flow condition and a preset temperature condition, and record the initial back pressure value of the ash sample after each ash loading cycle, and at the same time, perform ash purge on the ash sample after each ash loading cycle, and perform stage weighing on the ash sample after the ash purge to obtain the stage ash mass of the ash sample, and obtain the mass difference of the ash sample at the current stage according to the stage ash mass and the initial ash mass;

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

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

[0097] The second judgment unit is used to judge 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;

[0098] The second judgment unit is used to judge that the ash sample meets the loading cycle end condition if the stage ash mass 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 device of the ash sample of the embodiment of the present application, the ash mass, back pressure data and the first ash distribution state of the target cross section of the actual vehicle sample are obtained to formulate the ash sample. When the ash sample meets the equivalent conditions of the actual vehicle sample, the ash sample is subjected to an ash loading cycle to obtain the second ash distribution state of the target cross section in the ash sample. If the ash sample meets the end conditions of the loading cycle and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained. Thus, the problems of the method for preparing ash samples in the related art, which is time-consuming and expensive, and the equivalence of the ash samples is not judged, thereby affecting the evaluation performance and test reliability of the particle collector, are solved. Based on the equivalent preparation method of the actual vehicle ash sample of the burner, an ash sample equivalent to the actual vehicle is produced in a short time and at a lower cost, thereby improving the performance evaluation of the particle collector.

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

[0101] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0102] When the processor 502 executes the program, the equivalent preparation method of the ash sample provided in the above embodiment is implemented.

[0103] Furthermore, the vehicle also includes:

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

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

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

[0107] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

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

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

[0110] This embodiment also provides a computer-readable storage medium having a computer program stored thereon, which, 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 of the above embodiment.

[0112] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

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

[0114] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0115] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0116] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0117] A person skilled in the art may understand that all or part of the steps in the above-mentioned embodiment method may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0118] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0119] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An equivalent preparation method for ash samples, characterized in that: The following steps are involved: Acquire the ash mass, back pressure data and a first ash distribution state of a target cross section of a real vehicle sample, and formulate an ash sample based on the ash mass, the back pressure data and the first ash distribution state; Determining whether the ash sample meets the equivalent conditions of the actual vehicle sample; If the ash sample meets the equivalent conditions of the actual 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 end conditions and when 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 step of obtaining the ash mass, back pressure data and the first ash distribution state of the target cross section of the actual vehicle sample includes: Measuring a first pressure value at an inlet of a first target carrier and a second pressure value at an outlet of the first target carrier in the actual vehicle sample under a preset flow condition and a preset temperature condition, obtaining a pressure difference of the first target carrier based on the first pressure value and the second pressure value, so as to obtain back pressure data of the actual vehicle sample according to the pressure difference; The first target carrier is dissected, and dried together with the dissected second target carrier at a preset temperature and within a first preset time, and the first target carrier and the second target carrier are weighed within a second preset time to obtain a mass difference between the first target carrier and the second target carrier, so as to obtain the ash mass of the actual vehicle sample according to the mass difference; The first target carrier is detected based on a preset detection method to obtain an ash distribution state of the first target carrier, and an ash column height of a target cross section in the first target carrier is obtained based on the ash distribution state.

3. The method according to claim 1, characterized in that The determining whether the ash sample meets the equivalent conditions of the actual vehicle sample includes: Determine whether the ash mass deviation of the actual vehicle sample satisfies a first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample satisfies a second preset deviation condition, and whether the height deviation of each ash column in the first ash distribution state of the actual vehicle sample satisfies a third preset deviation condition; If the ash mass deviation of the actual vehicle sample satisfies the first preset deviation condition, and the back pressure data deviation of the actual vehicle sample satisfies the second preset deviation condition, and the height deviation of each ash column in the first ash distribution state of the actual vehicle sample satisfies the third preset deviation condition, then it is determined that the ash 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 a second ash distribution state of a target cross section in the ash sample 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 an initial ash mass of the ash sample; Based on preset flow conditions and preset temperature conditions, the ash sample is subjected to an ash loading cycle within a preset interval, and the initial back pressure value of the ash sample after each ash loading cycle is recorded, and at the same time, the ash sample is purged after each ash loading cycle, and the ash sample is weighed in stages after the ash purging to obtain the stage ash mass of the ash sample, and the mass difference of the ash sample at the current stage is obtained according to the stage ash mass and the initial ash mass; The ash sample is detected based on a preset detection method to obtain a second ash distribution state of the ash sample, and the second ash distribution state is compared with the first ash distribution state to obtain a detection feedback result of the ash sample, and the ash loading cycle speed within the next preset interval time is adjusted based on the detection feedback result.

5. The method according to claim 1, characterized in that The ash sample meets the loading cycle end condition, including: Determine 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 ash mass in the stage 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, it is determined that the ash sample satisfies the loading cycle end condition.

6. An equivalent preparation device for ash samples, characterized in that: include: A first acquisition module is used to acquire the ash mass, back pressure data and a first ash distribution state of a target cross section of a real vehicle sample, and formulate an ash sample based on the ash mass, the back pressure data and the first ash distribution state; A judgment module, used to judge whether the ash sample meets the equivalent conditions of the real 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 a second ash distribution state of the target cross section in the ash sample; if the ash sample meets the loading cycle end conditions and the second ash distribution state matches the first ash distribution state, an equivalent ash sample is obtained.

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

8. The device according to claim 6, characterized in that The judging module comprises: a first judgment unit, configured to judge whether the ash mass deviation of the actual vehicle sample satisfies a first preset deviation condition, whether the back pressure data deviation of the actual vehicle sample satisfies a second preset deviation condition, and whether the height deviation of each ash column in the first ash distribution state of the actual vehicle sample satisfies a third preset deviation condition; The first judgment unit is used to determine that the ash sample meets the equivalent condition of the actual vehicle sample if the ash mass 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 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, wherein the processor executes the program to implement an equivalent preparation method for an ash sample as described in any one of claims 1 to 5.

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

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