Method, device, and storage medium for detecting post-processing component

Abstract

The application relates to a method and device for detecting a post-processing component, a detection equipment, a storage medium and a computer program product. The method comprises the following steps: performing heating treatment on exhaust gas of an engine to obtain heated exhaust gas; determining a post-processing efficiency of the post-processing component based on a nitrogen oxide inlet concentration value of the heated exhaust gas and a nitrogen oxide outlet concentration value of output gas; the output gas is obtained by performing post-processing on the heated exhaust gas in the post-processing component; in the case that a sulfur detection result of the post-processing component is determined to be sulfur poisoning based on the post-processing efficiency, heating air to obtain heated air; performing desulfurization treatment on the post-processing component by using the heated air to obtain a desulfurized post-processing component. The method can be used for sulfur detection and desulfurization treatment of the post-processing component, so that the post-processing component can be effectively operated, and pollution caused by tail gas emission is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle component testing technology, and in particular to a method, apparatus, testing equipment, storage medium, and computer program product for testing after-processing components. Background Technology

[0002] With the development of vehicle technology, pollution caused by vehicle exhaust has attracted much attention; for diesel engines, after-treatment components can reduce pollution caused by nitrogen oxides in exhaust.

[0003] The aftertreatment component is an SCR (Selective Catalytic Reduction) component. The SCR component includes a precious metal coating that can adsorb NH3, a product of urea atomization and hydrolysis. Nitrogen oxides in vehicle exhaust react with the NH3 adsorbed on the SCR component to convert NOx into N2, thereby reducing the nitrogen oxide content in the exhaust.

[0004] When a vehicle uses diesel fuel with a high sulfur content, it is easy for the SCR component to become poisoned by sulfur, which can lead to the failure of the SCR component and make it difficult to meet the exhaust emission requirements. Summary of the Invention

[0005] Therefore, it is necessary to provide a method, apparatus, testing equipment, computer-readable storage medium, and computer program product for detecting post-treatment components, which can detect sulfur and desulfurize post-treatment components, ensuring that post-treatment components can operate effectively and reducing pollution caused by exhaust gas emissions.

[0006] Firstly, this application provides a method for detecting a post-processing component. The method includes:

[0007] The exhaust gas from the engine is heated to obtain heated exhaust gas. The aftertreatment efficiency of the aftertreatment unit is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas. The output gas is obtained by aftertreatment of the heated exhaust gas in the aftertreatment unit. If the sulfur detection result of the aftertreatment unit is determined to be sulfur poisoning based on the aftertreatment efficiency, the air is heated to obtain heated air. The aftertreatment unit is desulfurized using the heated air to obtain a desulfurized aftertreatment unit.

[0008] Secondly, this application also provides a detection device for post-processing components. The device includes:

[0009] The exhaust gas heating module is used to heat the exhaust gas from the engine to obtain heated exhaust gas.

[0010] The post-treatment efficiency determination module is used to determine the post-treatment efficiency of the post-treatment unit based on the inlet concentration value of nitrogen oxides in the heated exhaust gas and the outlet concentration value of nitrogen oxides in the output gas; the output gas is obtained by post-treating the heated exhaust gas in the post-treatment unit.

[0011] An air heating module is used to heat the air when the sulfur detection result of the post-treatment component is determined to be sulfur poisoning based on the post-treatment efficiency, so as to obtain heated air.

[0012] The desulfurization module is used to desulfurize the post-treatment components by heating the air, resulting in desulfurized post-treatment components.

[0013] Thirdly, this application also provides a detection device. The detection device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0014] The exhaust gas from the engine is heated to obtain heated exhaust gas. The aftertreatment efficiency of the aftertreatment unit is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas. The output gas is obtained by aftertreatment of the heated exhaust gas in the aftertreatment unit. If the sulfur detection result of the aftertreatment unit is determined to be sulfur poisoning based on the aftertreatment efficiency, the air is heated to obtain heated air. The aftertreatment unit is desulfurized using the heated air to obtain a desulfurized aftertreatment unit.

[0015] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0016] The exhaust gas from the engine is heated to obtain heated exhaust gas. The aftertreatment efficiency of the aftertreatment unit is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas. The output gas is obtained by aftertreatment of the heated exhaust gas in the aftertreatment unit. If the sulfur detection result of the aftertreatment unit is determined to be sulfur poisoning based on the aftertreatment efficiency, the air is heated to obtain heated air. The aftertreatment unit is desulfurized using the heated air to obtain a desulfurized aftertreatment unit.

[0017] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0018] The exhaust gas from the engine is heated to obtain heated exhaust gas. The aftertreatment efficiency of the aftertreatment unit is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas. The output gas is obtained by aftertreatment of the heated exhaust gas in the aftertreatment unit. If the sulfur detection result of the aftertreatment unit is determined to be sulfur poisoning based on the aftertreatment efficiency, the air is heated to obtain heated air. The aftertreatment unit is desulfurized using the heated air to obtain a desulfurized aftertreatment unit.

[0019] The aforementioned detection method, apparatus, testing equipment, storage medium, and computer program product for the aftertreatment component refer to the gas before it enters the aftertreatment component after heating, and the output gas is the gas after it has undergone aftertreatment by the aftertreatment component. Based on the inlet concentration values ​​of nitrogen oxides in the heated exhaust gas and the output gas, the catalytic effect of the metal layer of the aftertreatment component on the chemical reactions occurring in the aftertreatment component can be determined, thereby determining the aftertreatment efficiency of the aftertreatment component. When the sulfur detection result indicates sulfur poisoning based on the aftertreatment efficiency, the air can be heated, and the aftertreatment component can be desulfurized based on the heated air to obtain a desulfurized aftertreatment component. Sulfur detection can be performed on the aftertreatment component, and when sulfur poisoning occurs, desulfurization treatment can be performed on the aftertreatment component to ensure that the aftertreatment component can operate effectively and reduce pollution caused by exhaust gas emissions. Attached Figure Description

[0020] Figure 1 This is a flowchart illustrating the detection method of the post-processing component in one embodiment;

[0021] Figure 2 This is a schematic diagram of the detection device in one embodiment;

[0022] Figure 3 This is a schematic diagram of the sulfur detection process in another embodiment;

[0023] Figure 4 This is a schematic diagram of the desulfurization process in another embodiment;

[0024] Figure 5 This is a structural block diagram of the detection device of the post-processing component in one embodiment;

[0025] Figure 6 This is an internal structural diagram of the detection device in one embodiment. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] In some embodiments, such as Figure 1 As shown, a method for detecting a post-processing component, namely an SCR component, is provided. This embodiment illustrates the application of this method to a detection device. In this embodiment, the method includes the following steps:

[0028] Step 102: Heat the exhaust gas from the engine to obtain heated exhaust gas.

[0029] The engine is a diesel engine, which is an engine that burns diesel fuel to release energy, and the exhaust gas is the gas produced by burning diesel fuel.

[0030] In some embodiments, the aftertreatment component is removed from the vehicle and then installed in a testing device, which then tests the aftertreatment component. The testing device acquires the exhaust gases produced by the diesel engine and heats the exhaust gases using a heating element to obtain heated exhaust gases.

[0031] In some embodiments, the heating component may include a heater that releases heat when operating to heat the exhaust gas, resulting in heated exhaust gas. The heating component may also include a burner that generates heat by burning fuel to heat the exhaust gas, resulting in heated exhaust gas.

[0032] Step 104: Determine the post-treatment efficiency of the post-treatment unit based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas; the output gas is obtained by post-treating the heated exhaust gas in the post-treatment unit.

[0033] The post-treatment of the heated exhaust gas in the SCR component refers to the reaction between the heated exhaust gas and urea in the SCR component to obtain the output gas. During the reaction between the heated exhaust gas and urea, the noble metal coated on the SCR component can play a catalytic role. It is understandable that when the SCR component is in a sulfur poisoning state, the catalytic effect will be significantly reduced or even fail.

[0034] In some embodiments, the detection device includes a first nitrogen oxide concentration sensor and a second nitrogen oxide concentration sensor; the first nitrogen oxide concentration sensor is located before the inlet of the post-processing unit and is used to detect the nitrogen oxide inlet concentration value of the heated exhaust gas, and the second nitrogen oxide concentration sensor is located after the outlet of the post-processing unit and is used to detect the nitrogen oxide outlet concentration value of the output gas.

[0035] The detection equipment uses a first nitrogen oxide concentration sensor and a second nitrogen oxide concentration sensor to acquire the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas, respectively. The control unit of the detection equipment determines the post-treatment efficiency of the SCR component based on the nitrogen oxide inlet and outlet concentrations.

[0036] The lower the post-treatment efficiency, the lower the catalytic effect of the SCR component, resulting in a higher concentration of nitrogen oxides in the gas after treatment by the SCR component. The higher the post-treatment efficiency, the higher the catalytic effect of the SCR component, resulting in a lower concentration of nitrogen oxides in the gas after treatment by the SCR component.

[0037] Step 106: If the sulfur detection result of the post-processing component is determined to be sulfur poisoning based on the post-processing efficiency, the air is heated to obtain heated air.

[0038] The sulfur test results include sulfur poisoning or normal values. Heated air reaches a higher temperature, which can be used for desulfurization.

[0039] In some embodiments, the detection device determines the sulfur detection result based on the post-processing efficiency and a preset efficiency range; when the post-processing efficiency is within the preset efficiency range, the sulfur detection result is determined to be normal; when the post-processing efficiency is not within the preset efficiency range, the sulfur detection result is determined to be sulfur poisoning.

[0040] For example, the preset efficiency range can be [70%, 100%]. When the post-processing efficiency does not fall within the preset efficiency range (less than 70%), the detection record of the post-processing component is determined to be sulfur poisoning. For example, the preset efficiency range can also be [50%, 100%].

[0041] In some embodiments, after determining that the sulfur detection result indicates sulfur poisoning, the detection device disconnects from the engine, exposing the air intake of the detection device to the air. The detection device can then obtain the air in the environment, heat the air, and obtain heated air.

[0042] Step 108: Desulfurize the post-treatment component by heating the air to obtain the desulfurized post-treatment component.

[0043] In some embodiments, the desulfurization process of the SCR component can be completed when the temperature of the heated air reaches the desulfurization requirement temperature and the heated air at the desulfurization requirement temperature remains in the SCR component for the required desulfurization time.

[0044] In some embodiments, the detection device can adjust the temperature of the heated air, for example, by controlling the heater and burner, so that the temperature of the heated air meets the desulfurization requirements, and ensures that the temperature of the heated air meets the desulfurization requirements for a continuous desulfurization period, thereby completing the desulfurization treatment of the SCR component and obtaining the desulfurized SCR component.

[0045] In the above-mentioned detection method for the aftertreatment component, the heated exhaust gas is the gas before entering the aftertreatment component, and the output gas is the gas after being after treatment by the aftertreatment component. Based on the inlet concentration values ​​of nitrogen oxides in the heated exhaust gas and the inlet concentration values ​​of nitrogen oxides in the output gas, the catalytic effect of the metal layer of the aftertreatment component on the chemical reaction occurring in the aftertreatment component can be determined, thereby determining the aftertreatment efficiency of the aftertreatment component. When the sulfur detection result is determined to be sulfur poisoning based on the aftertreatment efficiency, the air can be heated, and the aftertreatment component can be desulfurized based on the heated air to obtain a desulfurized aftertreatment component. Sulfur detection can be performed on the aftertreatment component, and when the aftertreatment component is sulfur poisoned, desulfurization treatment can be performed on the aftertreatment component to ensure that the aftertreatment component can operate effectively and reduce pollution caused by exhaust gas emissions.

[0046] In some embodiments, heating the engine exhaust gas to obtain heated exhaust gas includes: when connected to the engine outlet and the engine is idling, sending the engine exhaust gas into a heater via a blower; heating the exhaust gas via the heater to obtain heated exhaust gas with a temperature within a first preset temperature range.

[0047] In some embodiments, the detection device includes a connecting pipe for connecting to the engine outlet. When the connecting pipe of the detection device is connected to the engine outlet, the engine is controlled to idle to generate exhaust gas. The detection device also includes a blower that sends the exhaust gas into a heater for heating.

[0048] In some embodiments, the detection device includes a heater and a temperature sensor. After the exhaust gas from the engine enters the heater, the exhaust gas is heated by the heater. During the heating process, the temperature of the exhaust gas is detected by the temperature sensor. When the temperature of the exhaust gas is less than the minimum value of a first preset temperature range, the heater is controlled to continue working. When the temperature of the exhaust gas is within the first preset temperature range, it is determined that the heated exhaust gas has been obtained. When the temperature of the exhaust gas is greater than the maximum value of the first preset temperature range, the heater is controlled to stop working until the temperature of the exhaust gas drops to the first preset temperature range.

[0049] The first preset temperature range can be set according to actual needs. For example, the first preset temperature range can be the temperature range when the aftertreatment component actually treats the exhaust gas. For example, the first preset temperature range can be (180℃, 200℃).

[0050] In some embodiments, the exhaust gas is heated by a heater to obtain the heated exhaust gas corresponding to the first target temperature; wherein, the first target temperature can be set according to actual needs, for example, the first target temperature can be 190°C.

[0051] In some embodiments, heating the engine exhaust gas to obtain heated exhaust gas includes: heating the engine exhaust gas with a heater to obtain intermediate exhaust gas; burning fuel with a burner to raise the temperature of the intermediate exhaust gas so that the temperature of the intermediate exhaust gas falls within a first preset temperature range; and using the intermediate exhaust gas with the temperature falling within the first preset temperature range as heated exhaust gas.

[0052] In some embodiments, the detection device includes a heater, a burner, and a temperature sensor. Engine exhaust gas enters the heater and is heated to obtain intermediate exhaust gas. This intermediate exhaust gas then enters the burner, where fuel is burned. The heat released from fuel combustion heats the intermediate exhaust gas. The temperature sensor detects the temperature of the intermediate exhaust gas. When the temperature of the intermediate exhaust gas is less than the minimum value of a first preset temperature range, the control unit of the detection device controls the burner to operate until the temperature of the intermediate exhaust gas falls within the first preset temperature range. When the temperature of the intermediate exhaust gas exceeds the maximum value of the first preset temperature range, the control unit of the detection device can control the burner to stop operating, thus ensuring that the temperature of the intermediate exhaust gas falls within the first preset temperature range. Following this process, the temperature of the intermediate exhaust gas is kept within the first preset temperature range, resulting in heated exhaust gas.

[0053] In some embodiments, the fuel may be fuel oil; the burner includes a fuel nozzle and a spark plug, and the fuel is burned by the burner. This can be achieved by controlling the fuel nozzle to release fuel oil and controlling the spark plug to ignite the fuel oil in the burner.

[0054] In some embodiments, heating the engine exhaust gas with a heater to obtain intermediate exhaust gas includes: sending the engine exhaust gas into the heater by a blower while connected to the engine outlet and the engine is idling; and heating the exhaust gas with the heater to obtain intermediate exhaust gas.

[0055] In the above embodiments, when the aftertreatment component performs sulfur detection, the connecting pipe of the detection equipment is connected to the engine outlet, and the exhaust gas is sent into the heater by the blower. The heater heats the exhaust gas to obtain heated exhaust gas with a temperature within the first preset temperature range, so that the aftertreatment component can perform aftertreatment on the heated exhaust gas.

[0056] In some embodiments, the detection method of the post-treatment component further includes: controlling the urea nozzle to output urea; atomizing the urea and inputting the atomized urea gas into the post-treatment component, so that the heated exhaust gas and urea gas are post-treated in the post-treatment component to obtain the output gas.

[0057] The detection equipment includes a mixer connected to a burner. The mixer includes a urea nozzle and an airflow baffle unit. When the urea nozzle is opened, it can output urea in a measured quantity. The airflow baffle unit can atomize the urea to obtain urea gas. The amount of urea output by the urea nozzle can be set according to actual needs; this embodiment does not limit this.

[0058] In some embodiments, the control unit of the control device controls the urea nozzle to output urea in a quantitative manner and controls the airflow baffle unit to operate in order to atomize the urea to obtain urea gas. The mixer and the post-treatment unit are connected so that the urea gas can enter the post-treatment unit. The heated exhaust gas is output from the burner and enters the post-treatment unit via the mixer.

[0059] The reaction between urea gas and the heated exhaust gas in the aftertreatment unit can be the standard reaction shown in formula (1), the fast reaction shown in formula (2), or the slow reaction shown in formula (3).

[0060] 4NH3 surf +4NO+O2→4N2+6H2O (1)

[0061] 4NH3 surf +2NO+2NO2→4N2+6H2O (2)

[0062] 8NH3 surf +6NO2→7N2+12H2O (3)

[0063] Among them, NH 3urf It is NH3 obtained after urea hydrolysis, NO is nitric oxide, O2 is oxygen, N2 is nitrogen, H2O is water, and NO2 is nitrogen dioxide.

[0064] In some embodiments, determining the post-treatment efficiency of the post-treatment component based on the inlet concentration value of nitrogen oxides in the heated exhaust gas and the outlet concentration value of nitrogen oxides in the output gas includes: determining a first cumulative nitrogen oxide value based on the inlet concentration value of nitrogen oxides in the heated exhaust gas; determining a second cumulative nitrogen oxide value based on the outlet concentration value of nitrogen oxides in the output gas; and determining the post-treatment efficiency of the post-treatment component based on the first cumulative nitrogen oxide value and the second cumulative nitrogen oxide value.

[0065] In some embodiments, the detection device includes a first nitrogen oxide concentration sensor located inside the mixer and before the urea nozzle, which can acquire the nitrogen oxide inlet concentration value of the heated exhaust gas; the detection device includes a second nitrogen oxide concentration sensor located after the outlet of the post-treatment component, which can acquire the nitrogen oxide outlet concentration value of the output gas.

[0066] For example, as shown in formulas (4), (5) and (6).

[0067]

[0068] in, It refers to post-processing efficiency, F(NO) x ) Up This is the first cumulative value of nitrogen oxides, F(NO). x ) Down This is the second cumulative value of nitrogen oxides.

[0069]

[0070]

[0071] Where t1 is the initial time of integration, t2 is the final time of integration, and Conc(NO) x ) Up This is the inlet concentration value of nitrogen oxides, Conc(NO). x ) Down This is the nitrogen oxide outlet concentration value. It is the exhaust mass flow rate. It is the molar mass of nitrogen oxides, f(T) Up f(T) is the inlet temperature correction factor. Down) is the outlet temperature correction factor.

[0072] For example, the initial integration time can be 0, the end integration time can be 30 min, the exhaust mass flow rate can be determined according to the blower parameters, the molar mass of nitrogen oxides is 31.6, and the inlet temperature correction coefficient and outlet temperature correction coefficient can be set according to actual needs.

[0073] In the above embodiments, the first cumulative value of nitrogen oxides and the second cumulative value of nitrogen oxides are determined by integration, and the post-processing efficiency is determined based on the first cumulative value of nitrogen oxides and the second cumulative value of nitrogen oxides, which can improve the accuracy of the post-processing efficiency.

[0074] In some embodiments, heating the air to obtain heated air includes: disconnecting the connection with the engine outlet and sending the air into a burner; and burning fuel in the burner to raise the temperature of the air to obtain heated air with a temperature within a second preset temperature range.

[0075] In some embodiments, during sulfur detection, the detection device is connected to the engine outlet. If the detection result of the aftertreatment component indicates sulfur poisoning, the connection between the detection device and the engine outlet is disconnected, exposing the inlet of the detection device to the air. The fuel is then burned by the burner to raise the air temperature, resulting in heated air with a temperature within a second preset temperature range.

[0076] The detection equipment controls the fuel injector to release fuel and controls the spark plug to ignite the fuel, thereby achieving combustion of the fuel in the burner. During the process of burning fuel in the burner to raise the temperature of the air in the aftertreatment unit, the temperature sensor detects the air temperature in the aftertreatment unit. When the air temperature is lower than the minimum value of a second preset temperature range, the control unit of the detection equipment controls the burner to operate until the air temperature falls within the second preset temperature range. When the air temperature is higher than the maximum value of the second preset temperature range, the control unit of the detection equipment can control the burner to stop operating, ensuring the air temperature falls within the second preset temperature range. Following this process, the air temperature is kept within the second preset temperature range, resulting in heated air. For example, the second preset temperature range can be [580℃, 620℃].

[0077] In some embodiments, the temperature sensor of the detection device includes a first temperature sensor and a second temperature sensor. The first temperature sensor is located before the inlet of the post-processing unit, and the second temperature sensor is located after the outlet of the post-processing unit. The temperature of the heated air at the inlet of the post-processing unit is detected by the first temperature sensor, and the temperature of the heated air at the outlet of the post-processing unit is detected by the second temperature sensor. An average temperature is determined based on the temperature of the heated air at the inlet and the temperature of the heated air at the outlet, thereby obtaining the temperature of the heated air.

[0078] In some embodiments, fuel is burned by a burner to raise the temperature of the air, so that the temperature of the heated air is a second target temperature; the second target temperature can be set according to actual needs, for example, the second target temperature can be 600°C.

[0079] In the above embodiments, during the desulfurization process of the post-treatment components, the air is heated by the burner to obtain heated air with a temperature within the second preset temperature range, so that the heated air can be used for subsequent desulfurization treatment.

[0080] In some embodiments, the desulfurization of the post-treatment component is performed by heating the air to obtain the desulfurized post-treatment component, including: when the temperature of the heated air in the post-treatment component is within a second preset temperature range and the duration reaches a preset duration, the desulfurization treatment of the post-treatment component is completed to obtain the desulfurized post-treatment component.

[0081] In some embodiments, the temperature of the heated air is controlled in a closed loop using a temperature sensor and a burner, ensuring that the temperature of the heated air remains within a second preset temperature range for a preset duration, thereby completing the desulfurization treatment for the post-treatment components. The preset duration can be set according to actual needs; for example, it could be 30 minutes.

[0082] In some embodiments, after the desulfurization treatment of the aftertreatment component is completed, steps 102 to 104 above can be repeated to determine the aftertreatment efficiency of the aftertreatment component after the desulfurization treatment. If the sulfur detection result is normal based on the aftertreatment efficiency, the desulfurization treatment is determined to be successful. If the sulfur detection result is sulfur poisoning based on the aftertreatment efficiency, it indicates that the desulfurization treatment of the aftertreatment component has failed, and the aftertreatment component of the vehicle can be replaced.

[0083] In some embodiments, the detection device further includes a differential pressure sensor, one end of which is connected to the inlet of the post-processing unit and the other end of which is connected to the outlet of the post-processing unit, for obtaining the pressure difference between the inlet and outlet of the post-processing unit. When the pressure difference does not belong to a preset pressure difference range, the detection device stops working.

[0084] In the above embodiments, the air is heated to obtain heated air with a temperature within the second preset temperature range, and this heated air is heated for a preset duration to complete the desulfurization treatment of the post-treatment components, ensuring that the post-treatment components can operate effectively and reducing pollution caused by exhaust emissions.

[0085] In some embodiments, the detection device, such as Figure 2 As shown, the device includes a connecting pipe 1, a blower 2, a heater 3, a burner 4, a fuel nozzle 5, a spark plug 6, a mixer 7, a first nitrogen oxide concentration sensor 8, a urea nozzle 9, a first temperature sensor 10, a differential pressure sensor 11, a second temperature sensor 12, a second nitrogen oxide concentration sensor 13, and an adjustable support frame 14. The detection device also includes a first interface and a second interface (not shown in the figure). When the detection device performs sulfur detection or desulfurization treatment on the post-treatment component 15, it is connected to the inlet of the post-treatment component 15 through the first interface and to the outlet of the post-treatment component 15 through the second interface. The adjustable support frame 14 allows the detection device to be adapted to post-treatment components of different sizes.

[0086] The detection equipment also includes a control unit (not shown in the figure). The control unit can acquire data collected by the first nitrogen oxide concentration sensor 8, the first temperature sensor 10, the differential pressure sensor 11, the second temperature sensor 12, and the second nitrogen oxide concentration sensor 13, and control the blower 2, heater 3, burner 4, fuel nozzle 5, spark plug 6, and urea nozzle 9 to realize sulfur detection and desulfurization treatment of the aftertreatment component 15.

[0087] In some embodiments, such as Figure 3 As shown, sulfur detection of the aftertreatment components includes: starting the detection equipment, performing a self-test, determining whether the self-test result is normal, starting the engine to idle if normal, otherwise stopping the detection; connecting the detection equipment to the engine outlet, heating the engine exhaust gas through a heater, determining whether the exhaust gas temperature reaches 190℃, if not reaching 190℃, continuing to heat the exhaust gas through the heater, if reaching 190℃, controlling the urea nozzle to output urea, the detection equipment determines the aftertreatment efficiency based on the nitrogen oxide inlet concentration and nitrogen oxide outlet concentration, and determining the sulfur detection result based on the aftertreatment efficiency; if the aftertreatment efficiency is not within the preset efficiency range, the sulfur detection result is determined to be sulfur poisoning, if the aftertreatment efficiency is within the preset efficiency range, the sulfur detection result is determined to be normal.

[0088] In some embodiments, such as Figure 4As shown, the desulfurization process for the aftertreatment components includes: disconnecting the connection between the detection equipment and the engine outlet; heating the air through the burner; acquiring the air temperature during the heating process; controlling the burner's operating state based on the air temperature to ensure that the heated air falls within a second preset temperature range; determining whether the duration for which the heated air falls within the second preset temperature range reaches a preset duration; if not, continuing to execute the step of controlling the burner's operating state based on the air temperature to ensure that the heated air falls within the second preset temperature range; if so, the desulfurization process for the aftertreatment components is completed.

[0089] In the above-mentioned detection method for the aftertreatment component, the heated exhaust gas is the gas before entering the aftertreatment component, and the output gas is the gas after being after treatment by the aftertreatment component. Based on the inlet concentration values ​​of nitrogen oxides in the heated exhaust gas and the inlet concentration values ​​of nitrogen oxides in the output gas, the catalytic effect of the metal layer of the aftertreatment component on the chemical reaction occurring in the aftertreatment component can be determined, thereby determining the aftertreatment efficiency of the aftertreatment component. When the sulfur detection result is determined to be sulfur poisoning based on the aftertreatment efficiency, the air can be heated, and the aftertreatment component can be desulfurized based on the heated air to obtain a desulfurized aftertreatment component. Sulfur detection can be performed on the aftertreatment component, and when the aftertreatment component is sulfur poisoned, desulfurization treatment can be performed on the aftertreatment component to ensure that the aftertreatment component can operate effectively and reduce pollution caused by exhaust gas emissions.

[0090] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0091] Based on the same inventive concept, this application also provides a detection device for post-processing components to implement the detection method for post-processing components described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations of one or more embodiments of the detection device for post-processing components provided below can be found in the limitations of the detection method for post-processing components described above, and will not be repeated here.

[0092] In one embodiment, such as Figure 5As shown, a detection device for an aftertreatment component is provided, comprising: an exhaust gas heating module 501, an aftertreatment efficiency determination module 502, an air heating module 503, and a desulfurization treatment module 504; wherein,

[0093] The exhaust gas heating module 501 is used to heat the exhaust gas of the engine to obtain heated exhaust gas;

[0094] The post-treatment efficiency determination module 502 is used to determine the post-treatment efficiency of the post-treatment unit based on the inlet concentration value of nitrogen oxides in the heated exhaust gas and the outlet concentration value of nitrogen oxides in the output gas; the output gas is obtained by post-treating the heated exhaust gas in the post-treatment unit.

[0095] Air heating module 503 is used to heat the air when the sulfur detection result of the post-treatment component is determined to be sulfur poisoning based on the post-treatment efficiency, so as to obtain heated air;

[0096] The desulfurization module 504 is used to desulfurize the post-treatment components by heating the air to obtain the desulfurized post-treatment components.

[0097] In some embodiments, the exhaust gas heating module 501 is further configured to, when connected to the outlet of the engine and the engine is idling, send the exhaust gas of the engine into the heater via a blower; and heat the exhaust gas by the heater to obtain heated exhaust gas with a temperature within a first preset temperature range.

[0098] In some embodiments, the air heating module 503 is further configured to disconnect from the engine outlet and send air into the burner; the burner burns fuel to raise the temperature of the air, resulting in heated air with a temperature within a second preset temperature range.

[0099] In some embodiments, the post-processing efficiency determination module 502 is further configured to determine a first cumulative nitrogen oxide value based on the nitrogen oxide inlet concentration value of the heated exhaust gas; determine a second cumulative nitrogen oxide value based on the nitrogen oxide outlet concentration value of the output gas; and determine the post-processing efficiency of the post-processing component based on the first cumulative nitrogen oxide value and the second cumulative nitrogen oxide value.

[0100] In some embodiments, the desulfurization module 504 is further configured to complete the desulfurization process for the post-treatment component when the temperature of the heated air in the post-treatment component falls within a second preset temperature range and the duration reaches a preset duration, thereby obtaining the desulfurized post-treatment component.

[0101] In some embodiments, the detection device of the post-processing component further includes:

[0102] The urea output module controls the urea nozzle to output urea; it atomizes the urea and inputs the atomized urea gas into the post-processing unit, so that the heated exhaust gas and urea gas are post-processed in the post-processing unit to obtain the output gas.

[0103] Each module in the aforementioned post-processing component's detection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the detection device in hardware form or independent of it, or stored in the memory of the detection device in software form, so that the processor can call and execute the corresponding operations of each module.

[0104] In one embodiment, a detection device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 6 As shown, the testing device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a testing method for a post-processing component. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the testing equipment can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the housing of the testing equipment, or external keyboards, touchpads, or mice, etc.

[0105] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the testing equipment to which the present application is applied. Specific testing equipment may include more or fewer components than those shown in the figure, or may combine certain components, or may have different component arrangements.

[0106] In one embodiment, a detection device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0107] The exhaust gas from the engine is heated to obtain heated exhaust gas. The aftertreatment efficiency of the aftertreatment unit is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas. The output gas is obtained by aftertreatment of the heated exhaust gas in the aftertreatment unit. If the sulfur detection result of the aftertreatment unit is determined to be sulfur poisoning based on the aftertreatment efficiency, the air is heated to obtain heated air. The aftertreatment unit is desulfurized using the heated air to obtain a desulfurized aftertreatment unit.

[0108] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0109] When connected to the engine outlet and the engine is idling, the exhaust gas from the engine is sent to the heater by a blower; the exhaust gas is heated by the heater to obtain heated exhaust gas with a temperature within the first preset temperature range.

[0110] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0111] Disconnect the connection to the engine outlet and send air into the burner; the burner burns the fuel to raise the temperature of the air, resulting in heated air with a temperature within the second preset temperature range.

[0112] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0113] A first cumulative nitrogen oxide value is determined based on the inlet concentration of nitrogen oxides in the exhaust gas after heating; a second cumulative nitrogen oxide value is determined based on the outlet concentration of nitrogen oxides in the output gas; and the post-treatment efficiency of the post-treatment unit is determined based on the first and second cumulative nitrogen oxide values.

[0114] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0115] When the temperature of the heated air in the post-treatment unit falls within the second preset temperature range and the duration reaches the preset duration, the desulfurization treatment of the post-treatment unit is completed, and the desulfurized post-treatment unit is obtained.

[0116] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0117] Control the urea nozzle to output urea; atomize the urea and input the atomized urea gas into the post-treatment unit so that the heated exhaust gas and urea gas are post-treated in the post-treatment unit to obtain the output gas.

[0118] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0119] The exhaust gas from the engine is heated to obtain heated exhaust gas. The aftertreatment efficiency of the aftertreatment unit is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas. The output gas is obtained by aftertreatment of the heated exhaust gas in the aftertreatment unit. If the sulfur detection result of the aftertreatment unit is determined to be sulfur poisoning based on the aftertreatment efficiency, the air is heated to obtain heated air. The aftertreatment unit is desulfurized using the heated air to obtain a desulfurized aftertreatment unit.

[0120] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0121] When connected to the engine outlet and the engine is idling, the exhaust gas from the engine is sent to the heater by a blower; the exhaust gas is heated by the heater to obtain heated exhaust gas with a temperature within the first preset temperature range.

[0122] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0123] Disconnect the connection to the engine outlet and send air into the burner; the burner burns the fuel to raise the temperature of the air, resulting in heated air with a temperature within the second preset temperature range.

[0124] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0125] A first cumulative nitrogen oxide value is determined based on the inlet concentration of nitrogen oxides in the exhaust gas after heating; a second cumulative nitrogen oxide value is determined based on the outlet concentration of nitrogen oxides in the output gas; and the post-treatment efficiency of the post-treatment unit is determined based on the first and second cumulative nitrogen oxide values.

[0126] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0127] When the temperature of the heated air in the post-treatment unit falls within the second preset temperature range and the duration reaches the preset duration, the desulfurization treatment of the post-treatment unit is completed, and the desulfurized post-treatment unit is obtained.

[0128] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0129] Control the urea nozzle to output urea; atomize the urea and input the atomized urea gas into the post-treatment unit so that the heated exhaust gas and urea gas are post-treated in the post-treatment unit to obtain the output gas.

[0130] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0131] The exhaust gas from the engine is heated to obtain heated exhaust gas. The aftertreatment efficiency of the aftertreatment unit is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas. The output gas is obtained by aftertreatment of the heated exhaust gas in the aftertreatment unit. If the sulfur detection result of the aftertreatment unit is determined to be sulfur poisoning based on the aftertreatment efficiency, the air is heated to obtain heated air. The aftertreatment unit is desulfurized using the heated air to obtain a desulfurized aftertreatment unit.

[0132] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0133] When connected to the engine outlet and the engine is idling, the exhaust gas from the engine is sent to the heater by a blower; the exhaust gas is heated by the heater to obtain heated exhaust gas with a temperature within the first preset temperature range.

[0134] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0135] Disconnect the connection to the engine outlet and send air into the burner; the burner burns the fuel to raise the temperature of the air, resulting in heated air with a temperature within the second preset temperature range.

[0136] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0137] A first cumulative nitrogen oxide value is determined based on the inlet concentration of nitrogen oxides in the exhaust gas after heating; a second cumulative nitrogen oxide value is determined based on the outlet concentration of nitrogen oxides in the output gas; and the post-treatment efficiency of the post-treatment unit is determined based on the first and second cumulative nitrogen oxide values.

[0138] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0139] When the temperature of the heated air in the post-treatment unit falls within the second preset temperature range and the duration reaches the preset duration, the desulfurization treatment of the post-treatment unit is completed, and the desulfurized post-treatment unit is obtained.

[0140] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0141] Control the urea nozzle to output urea; atomize the urea and input the atomized urea gas into the post-treatment unit so that the heated exhaust gas and urea gas are post-treated in the post-treatment unit to obtain the output gas.

[0142] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0143] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0144] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for detecting a post-processing component, characterized in that, The method includes: The exhaust gases from the engine are heated to obtain heated exhaust gases; The post-treatment efficiency of the post-treatment unit is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas; the output gas is obtained by post-treating the heated exhaust gas in the post-treatment unit. If the sulfur detection result of the post-processing component is determined to be sulfur poisoning based on the post-processing efficiency, the air is heated to obtain heated air. The post-treatment component is desulfurized by the heated air to obtain a desulfurized post-treatment component. The determination of the post-treatment efficiency of the post-treatment unit based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas includes: A first cumulative nitrogen oxide value is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas; a second cumulative nitrogen oxide value is determined based on the outlet concentration of nitrogen oxides in the output gas. Based on the first cumulative nitrogen oxide value and the second cumulative nitrogen oxide value, the post-processing efficiency of the post-processing unit is determined; the calculation formula is as follows: in, It's about post-processing efficiency. This is the first cumulative value of nitrogen oxides. This is the second cumulative value of nitrogen oxides; in, It is the initial moment of integration. It is the moment when the integration ends. This is the inlet concentration value of nitrogen oxides. This is the nitrogen oxide outlet concentration value. It is the exhaust mass flow rate. It is the molar mass of nitrogen oxides. It is the inlet temperature correction factor. It is the outlet temperature correction factor; The heating treatment of engine exhaust gases to obtain heated exhaust gases includes: When the connecting pipe of the detection equipment is connected to the outlet of the engine, the engine is controlled to idle to generate exhaust gas; the exhaust gas of the engine is sent to the heater by the blower; the exhaust gas of the engine is heated by the heater to obtain intermediate exhaust gas; the fuel is burned by the burner to increase the temperature of the intermediate exhaust gas so that the temperature of the intermediate exhaust gas is within the first preset temperature range; the intermediate exhaust gas with the temperature within the first preset temperature range is used as the heated exhaust gas. The heating of air to obtain heated air includes: Disconnect the connection with the engine outlet and send air into the burner; burn the fuel in the burner to raise the temperature of the air and obtain heated air with a temperature within the second preset temperature range.

2. The method according to claim 1, characterized in that, The process of desulfurizing the post-treatment component using heated air to obtain a desulfurized post-treatment component includes: When the temperature of the heated air in the post-treatment component falls within the second preset temperature range and the duration reaches the preset duration, the desulfurization treatment of the post-treatment component is completed, and the desulfurized post-treatment component is obtained.

3. The method according to any one of claims 1 to 2, characterized in that, The method further includes: Control the urea nozzle to output urea; The urea is atomized, and the urea gas obtained from the atomization is input into the post-processing unit so that the heated exhaust gas and the urea gas are post-processed in the post-processing unit to obtain the output gas.

4. A detection device for a post-processing component, characterized in that, The device includes: The exhaust gas heating module is used to heat the exhaust gas from the engine to obtain heated exhaust gas. The post-treatment efficiency determination module is used to determine the post-treatment efficiency of the post-treatment unit based on the inlet concentration value of nitrogen oxides in the heated exhaust gas and the outlet concentration value of nitrogen oxides in the output gas; the output gas is obtained by post-treating the heated exhaust gas in the post-treatment unit. An air heating module is used to heat the air to obtain heated air when the sulfur detection result of the post-processing component is determined to be sulfur poisoning based on the post-processing efficiency. A desulfurization module is used to desulfurize the post-treatment component using heated air to obtain a desulfurized post-treatment component. The determination of the post-treatment efficiency of the post-treatment unit based on the inlet concentration of nitrogen oxides in the heated exhaust gas and the outlet concentration of nitrogen oxides in the output gas includes: A first cumulative nitrogen oxide value is determined based on the inlet concentration of nitrogen oxides in the heated exhaust gas; a second cumulative nitrogen oxide value is determined based on the outlet concentration of nitrogen oxides in the output gas. Based on the first cumulative nitrogen oxide value and the second cumulative nitrogen oxide value, the post-processing efficiency of the post-processing unit is determined; the calculation formula is as follows: in, It's about post-processing efficiency. This is the first cumulative value of nitrogen oxides. This is the second cumulative value of nitrogen oxides; in, It is the initial moment of integration. It is the moment when the integration ends. This is the inlet concentration value of nitrogen oxides. This is the nitrogen oxide outlet concentration value. It is the exhaust mass flow rate. It is the molar mass of nitrogen oxides. It is the inlet temperature correction factor. It is the outlet temperature correction factor; The heating treatment of engine exhaust gases to obtain heated exhaust gases includes: When the connecting pipe of the detection equipment is connected to the outlet of the engine, the engine is controlled to idle to generate exhaust gas; the exhaust gas of the engine is sent to the heater by the blower; the exhaust gas of the engine is heated by the heater to obtain intermediate exhaust gas; the fuel is burned by the burner to increase the temperature of the intermediate exhaust gas so that the temperature of the intermediate exhaust gas is within the first preset temperature range; the intermediate exhaust gas with the temperature within the first preset temperature range is used as the heated exhaust gas. The heating of air to obtain heated air includes: Disconnect the connection with the engine outlet and send air into the burner; burn the fuel in the burner to raise the temperature of the air and obtain heated air with a temperature within the second preset temperature range.

5. A detection device, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 3.

7. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 3.

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