Method, device and medium for manufacturing scr fault part with low efficiency

Abstract

The present disclosure relates to an SCR efficiency low fault piece manufacturing method, device, equipment and medium, the method comprises: obtaining the original emission value of nitride in the engine original machine emission WHTC cycle test, and the test emission value of nitride of reference SCR catalytic converter in the WHTC cycle test of engine;The target emission value of nitride in the WHTC test of engine of the target fault piece to be manufactured is obtained, and the effective area of catalytic conversion coating of reference SCR catalytic converter is obtained;According to the original emission value, the test emission value, the target emission value, the effective area of catalytic conversion coating of SCR catalytic converter and the preset model, the target area of catalytic conversion coating of the target fault piece to be manufactured is calculated, and the catalytic conversion coating of reference SCR catalytic converter with preset thickness and preset area is removed by control execution device, and the SCR efficiency low fault piece is obtained.

Description

Technical Field

[0001] This disclosure relates to the field of diesel engine testing machines, specifically to a method, apparatus, equipment, and medium for manufacturing SCR low-efficiency failure components. Background Technology

[0002] Vehicle exhaust contains various pollutants that have a significant negative impact on human health and the environment. Therefore, monitoring vehicle exhaust emissions is crucial for preventing and controlling exhaust pollution. On-Board Diagnostics (OBD) systems monitor sensors, actuators, and electronic controllers. By monitoring the operating signals of emission-related components, it determines whether vehicle exhaust emissions exceed standards. If any abnormal signals occur, the system identifies whether the relevant components or circuits are malfunctioning, illuminates a fault indicator light, and stores the corresponding fault code in its internal data.

[0003] OBD monitoring function fault simulation involves selecting from various fault types that may be encountered during vehicle operation, as required by regulations. Low SCR (Selective Catalytic Reduction) efficiency faults are a mandatory component. To better simulate these faults, the first step is to create a faulty component demonstrating low SCR efficiency. However, the main methods for creating such components include heat treatment and reducing catalyst coating. Heat treatment is time-consuming and requires repeated testing, while reducing catalyst coating can only be done by after-treatment manufacturers. Both methods are inefficient and costly. Therefore, there is an urgent need for a new, cost-effective, and more efficient method for creating low-efficiency SCR faulty components. Summary of the Invention

[0004] This disclosure provides a method, apparatus, equipment, and medium for manufacturing SCR low-efficiency faulty components, which can improve the accuracy and convenience of manufacturing SCR low-efficiency faulty components, reduce the manufacturing cost of SCR low-efficiency faulty components, and improve the manufacturing efficiency of faulty components.

[0005] According to some embodiments, one aspect of this disclosure provides a method for manufacturing a low-efficiency SCR faulty component, comprising: obtaining the original emission value of nitrogen oxides in the original engine emission WHTC cycle test, and the test emission value of nitrogen oxides of a reference SCR catalytic converter in the engine WHTC cycle test; obtaining the target emission value of nitrogen oxides of the target faulty component to be manufactured in the engine WHTC test, and the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter; calculating the target area of ​​the catalytic conversion coating of the target faulty component to be manufactured by inputting a preset model based on the original emission value of nitrogen oxides in the original engine emission WHTC cycle test, the test emission value of nitrogen oxides of the reference SCR catalytic converter in the engine WHTC cycle test, the target emission value of nitrogen oxides of the target faulty component to be manufactured in the engine WHTC test, and the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter; and controlling an execution device to remove the catalytic conversion coating of the reference SCR catalytic converter of a preset thickness and a preset area, wherein the preset area is associated with the difference between the effective area and the target area.

[0006] In the above-described method for manufacturing a low-efficiency SCR component, the target area of ​​the catalytic converter coating of the target component can be calculated using a preset model based on the original nitrogen oxide emission value from the engine's WHTC cycle test, the test nitrogen oxide emission value of the reference SCR catalytic converter in the engine's WHTC cycle test, the target nitrogen oxide emission value of the target component to be manufactured in the engine's WHTC test, and the effective area of ​​the catalytic converter coating of the reference SCR catalytic converter. By selecting the target nitrogen oxide emission value of the target component to be manufactured in the engine's WHTC test according to manufacturing requirements, and calculating the target area of ​​the catalytic converter coating of the target component to be manufactured corresponding to the target nitrogen oxide emission value of the target component to be manufactured in the engine's WHTC test, the accuracy of manufacturing the low-efficiency SCR component is improved. Furthermore, the preset area of ​​the catalytic converter coating of the reference SCR catalytic converter that needs to be removed is obtained, improving manufacturing efficiency. This avoids obtaining the low-efficiency SCR component through multiple WHTC cycle tests and multiple heat treatments. Moreover, the manufacturing device for the low-efficiency SCR component is changed from a heating furnace to a removal execution device, effectively reducing the manufacturing difficulty and cost.

[0007] In some embodiments, the catalytic conversion efficiency of the reference SCR catalytic converter is calculated based on the test emission value of nitrogen oxides in the WHTC cycle test of the reference SCR catalytic converter in the engine, and the original emission value of nitrogen oxides in the WHTC cycle test of the original engine emission; the catalytic conversion efficiency of the target faulty part to be manufactured is calculated based on the original emission value of nitrogen oxides in the WHTC cycle test of the original engine emission and the target emission value of nitrogen oxides in the WHTC test of the target faulty part to be manufactured; the target area is obtained based on the ratio of the catalytic conversion efficiency of the reference SCR catalytic converter to the catalytic conversion efficiency of the target faulty part to be manufactured, the ratio of the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter to the target area of ​​the catalytic conversion coating of the target faulty part to be manufactured, and the proportional relationship between the above efficiency ratio and the above area ratio.

[0008] In some embodiments, the target area S2 of the catalytic converter coating of the target faulty component to be manufactured is calculated based on the original nitrogen oxide emission value in the WHTC cycle test of the original engine, the tested nitrogen oxide emission value of the reference SCR catalytic converter in the WHTC cycle test of the engine, the target nitrogen oxide emission value of the target faulty component to be manufactured in the WHTC test of the engine, and the effective area of ​​the catalytic converter coating of the reference SCR catalytic converter. This includes:

[0009] S2 = (bc)S1 / (ba);

[0010] In the above formula, a is the test emission value of nitrogen oxides in the engine WHTC cycle test of the reference SCR catalytic converter; b is the original emission value of nitrogen oxides in the engine WHTC cycle test of the original engine; c is the target emission value of nitrogen oxides in the engine WHTC test of the target faulty part to be manufactured; S1 is the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter.

[0011] In some embodiments, the actuator includes at least one of a drilling device, an etching device, and a grinding device. Compared with the conventional method of reducing the catalytic activity of the SCR catalyst by heating a furnace, the use of drilling, etching, and grinding devices significantly reduces the equipment requirements for manufacturing SCR low-efficiency failure parts, and improves the ease of manufacturing and preparation cost.

[0012] In some embodiments, the actuator is a drilling device and the area of ​​a single hole is S0. Controlling the actuator to remove the catalytic conversion coating of a reference SCR catalytic converter with a preset thickness and preset area includes:

[0013] The drilling device is controlled to drill vertically into the catalytic conversion coating of the reference SCR catalytic converter. The drilling depth is equal to the thickness of the catalytic conversion coating, and the number of holes, n, is calculated according to the following formula:

[0014] n = (S1 - S2) / S0.

[0015] Another aspect of this disclosure provides an apparatus for manufacturing a low-efficiency SCR faulty component, including a first measurement module, a second measurement module, and a control module. The first measurement module is used to acquire the original nitrogen oxide emission value in the WHTC cycle test of the original engine emissions, and the test nitrogen oxide emission value of a reference SCR catalytic converter in the WHTC cycle test of the engine. The second measurement module is used to acquire the target nitrogen oxide emission value of the target faulty component to be manufactured in the WHTC test of the engine, and the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter. The control module is configured to: calculate the target area of ​​the catalytic conversion coating of the target faulty component based on the original nitrogen oxide emission value in the WHTC cycle test of the original engine emissions, the test nitrogen oxide emission value of the reference SCR catalytic converter in the WHTC cycle test of the engine, the target nitrogen oxide emission value of the target faulty component to be manufactured in the WHTC test of the engine, the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter, and a preset model; and control an execution device to remove the catalytic conversion coating of the reference SCR catalytic converter of a preset thickness and preset area to obtain the target faulty component.

[0016] In the above-described embodiment of the SCR low-efficiency fault component manufacturing apparatus, the first measurement module, the second measurement module, and the control module cooperate with each other. The first measurement module measures the original nitrogen oxide emission value of the engine in the WHTC cycle test and the test nitrogen oxide emission value of the reference SCR catalytic converter in the WHTC cycle test of the engine. The second measurement module measures the target nitrogen oxide emission value of the target fault component to be manufactured in the WHTC test of the engine and the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter. The control module obtains the aforementioned values ​​provided by the measurement module and substitutes these values ​​into a preset model to calculate the target area of ​​the catalytic conversion coating of the target fault component to be manufactured. Based on the difference between the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter and the target area, the area of ​​the catalytic conversion coating of the reference SCR catalytic converter to be removed is determined, for example, a preset area. This allows the control module to accurately and effectively control the execution device to remove the catalytic conversion coating of the reference SCR catalytic converter of preset thickness and preset area, thereby obtaining the target fault component. This improves the accuracy of manufacturing SCR low-efficiency fault components, avoids multiple WHTC tests, improves manufacturing efficiency, and reduces manufacturing costs.

[0017] In some embodiments, the control module includes a calculation unit, configured to: calculate the catalytic conversion efficiency of a reference SCR catalytic converter based on the original nitrogen emission value in the engine's original WHTC cycle test and the test nitrogen emission value of a reference SCR catalytic converter in the engine's WHTC cycle test; calculate the catalytic conversion efficiency of a target faulty component to be manufactured based on the original nitrogen emission value in the engine's original WHTC cycle test and the target nitrogen emission value of the target faulty component to be manufactured in the engine's WHTC test; and derive the target area based on the ratio of the catalytic conversion efficiency of the reference SCR catalytic converter to the catalytic conversion efficiency of the target faulty component to be manufactured, the ratio of the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter to the target area of ​​the catalytic conversion coating of the target faulty component to be manufactured, and the proportional relationship between the above efficiency ratio and the above area ratio.

[0018] In some embodiments, the actuator in the control module includes at least one of a drilling device, an etching device, and a grinding device.

[0019] Another aspect of the present disclosure provides a fault component manufacturing apparatus, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method described in any embodiment of the present disclosure.

[0020] Another aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the methods described in any embodiment of the present disclosure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart of a method for manufacturing a low-efficiency SCR faulty component using a conventional heating method, as provided in one embodiment of the present disclosure.

[0023] Figure 2 This is a flowchart of a method for manufacturing a low-efficiency SCR faulty component according to an embodiment of the present disclosure;

[0024] Figure 3 This is a flowchart of a method for calculating the target area of ​​a catalytic conversion coating for a target faulty component to be manufactured, provided in one embodiment of this disclosure.

[0025] Figure 4This is a diagram of the apparatus for manufacturing low-efficiency SCR components provided in one embodiment of the present disclosure;

[0026] Figure 5 This is a diagram showing the control module composition of an SCR low-efficiency fault component manufacturing apparatus provided in one embodiment of the present disclosure. Detailed Implementation

[0027] To facilitate understanding of this disclosure, a more complete description will now be given with reference to the accompanying drawings, in which preferred embodiments of the present disclosure are shown. However, this disclosure may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the disclosure will be achieved.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0030] The primary function of an SCR system is to treat nitrogen oxides in exhaust gas. The fundamental purpose of manufacturing low-efficiency SCR components is to reduce the catalytic conversion efficiency of the SCR catalytic converter. Current manufacturing methods include heat treatment and reducing the amount of catalyst coating. Heat treatment involves placing the SCR catalytic converter in a high-temperature furnace and introducing a certain concentration of water vapor for a specific time. This reduces the catalytic activity of the SCR catalytic converter, decreasing the efficiency of the chemical reaction between ammonia as a reducing agent and nitrogen oxides, thus lowering the catalytic conversion efficiency of the SCR system. Reducing the amount of catalyst coating involves the aftertreatment manufacturer directly reducing the amount of catalyst coated, thereby lowering the catalytic conversion efficiency of the SCR catalytic converter.

[0031] Figure 1 This is a flowchart of a method for manufacturing a low-efficiency SCR component using a conventional heating method, as provided in one embodiment of the present disclosure, including:

[0032] Step S10: Obtain an SCR catalytic converter with normal efficiency;

[0033] Step S20: Pass water vapor through and heat the water for a certain period of time;

[0034] Step S30: Conduct a WHTC test on the faulty SCR component to verify the emission results and whether they meet the requirements;

[0035] Step S40: Obtain the SCR low efficiency faulty component.

[0036] In step S20, since the heating process requires the introduction of water vapor at a high temperature, it is highly dependent on the equipment. Therefore, the heating method is not only constrained by the equipment, but also takes a long time and has low production efficiency.

[0037] In step S30, due to the differences between different original engines and different SCR catalytic converters, it is impossible to map variables such as water vapor temperature, water vapor concentration, and treatment time to the catalytic conversion efficiency of the final SCR low-efficiency faulty component. Therefore, it is impossible to accurately obtain the required SCR low-efficiency faulty component through a single heating process. It is only possible to control variables such as water vapor temperature, water vapor concentration, and treatment time through estimation methods. Then, the SCR low-efficiency faulty component is subjected to a WHTC test to verify whether the emission results meet the requirements. If they do not meet the requirements, S20 is continued until the requirements are met. The repeated verification method increases the time required to produce the SCR low-efficiency faulty component, resulting in a certain degree of waste of human and material resources. Furthermore, because the nitrogen oxide emissions from low-efficiency SCR components after WHTC cycling must not exceed 1.2 times the limit (1200 mg / kWh), typically falling between 1200 mg / kWh and 1440 mg / kWh, the time required to obtain this value varies. Since the damage to the catalytic activity of the SCR catalytic converter caused by heating is irreversible, if the heating time is too long and the nitrogen oxide emissions exceed the upper limit, the SCR catalytic converter cannot be used for further production. It must be replaced with another SCR catalytic converter with normal efficiency. Therefore, the traditional method of heating to produce low-efficiency SCR components lacks precise control, resulting in high production costs and low efficiency. Reducing the amount of catalytic conversion coating on the reference SCR catalytic converter requires controlling the catalyst coating amount during production, which cannot be done on the finished product. Therefore, it must be implemented by the after-processor manufacturer, essentially making it a dedicated supply for the faulty component, resulting in low production efficiency.

[0038] In the above embodiment, WHTC is a globally recognized automotive emissions testing standard. The test includes simulating the vehicle's driving state under real road conditions at a certain speed and acceleration in a laboratory setting, thereby conducting vehicle emissions tests.

[0039] Figure 2 The flowchart of a method for manufacturing a low-efficiency SCR faulty component provided in one embodiment of this disclosure includes:

[0040] Step S100: Obtain the original nitrogen emission value of the engine in the WHTC cycle test, the nitrogen emission value of the reference SCR catalytic converter in the WHTC cycle test of the engine, the target nitrogen emission value of the target faulty part to be manufactured in the WHTC test of the engine, and the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter.

[0041] Step S200: Calculate the target area of ​​the catalytic conversion coating of the target faulty component to be manufactured based on the aforementioned original emission value, the aforementioned test emission value, the aforementioned target emission value, the effective area of ​​the catalytic conversion coating of the aforementioned SCR catalytic converter, and the preset model.

[0042] Step S300: Control the actuator to remove the catalytic conversion coating of the reference SCR catalytic converter with a preset thickness and preset area, and obtain the SCR low efficiency faulty part.

[0043] In step S100, as an example, the nitrogen oxide emission value of the SCR catalytic converter in the WHTC test of the engine is less than 1200 mg / kWh. The target nitrogen oxide emission value of the target faulty component to be manufactured in the WHTC test of the engine cannot exceed 1.2 times the limit (1200 mg / kWh), and should be between 1200 mg / kWh and 1440 mg / kWh. In order to avoid irreversible damage to the SCR catalytic converter due to manufacturing or measurement errors exceeding the upper limit, the target emission value should be selected at the lower limit of 1200 mg / kWh-1440 mg / kWh.

[0044] In step S200, as an example, the preset model establishes a correspondence between the target nitrogen emission value of the target faulty component to be manufactured in the WHTC test of the engine and the target area of ​​the catalytic conversion coating of the target faulty component to be manufactured. The target nitrogen emission value of the target faulty component to be manufactured in the WHTC test of the engine is input into the preset model to calculate the target area of ​​the corresponding catalytic conversion coating of the target faulty component to be manufactured. This avoids the nitrogen emission value of the low SCR efficiency faulty component in the WHTC test of the engine exceeding the required range, thereby improving the accuracy of the manufacturing of the low SCR efficiency faulty component.

[0045] In step S300, as an example, the preset area is associated with the area ratio between the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter and the target area of ​​the catalytic conversion coating of the target faulty component to be manufactured, and the preset thickness is the thickness of the catalytic conversion coating of the reference SCR catalytic converter.

[0046] In the above-described method for manufacturing a low-efficiency SCR component, the target area of ​​the catalytic converter coating for the target component is calculated using a preset model based on the original nitrogen oxide emission values ​​from the engine's original WHTC cycle test, the tested nitrogen oxide emission values ​​from the reference SCR catalytic converter during the engine's WHTC cycle test, the target nitrogen oxide emission values ​​from the target component to be manufactured during the engine's WHTC test, and the effective area of ​​the catalytic converter coating of the reference SCR catalytic converter. Compared to the traditional method of manufacturing low-efficiency SCR components by estimating the SCR catalytic converter's performance and repeatedly conducting WHTC tests to verify compliance, this method uses a preset model to correlate the input and output values, precisely controlling the nitrogen oxide emission values ​​of the component within the required range. This avoids multiple WHTC tests on the low-efficiency SCR component without measurement or manufacturing errors, improving the accuracy of SCR component manufacturing. Furthermore, it determines the preset area of ​​the catalytic converter coating of the reference SCR catalytic converter to be removed, thus obtaining the target component. This method places no special limitations on equipment and reduces manufacturing costs and difficulty.

[0047] For example, please refer to Figure 3 In step S210, the catalytic conversion efficiency of the reference SCR catalytic converter is calculated based on the test emission value of nitrogen oxides in the WHTC cycle test of the reference SCR catalytic converter and the original emission value of nitrogen oxides in the WHTC cycle test of the original engine. In step S220, the catalytic conversion efficiency of the target faulty part to be manufactured is calculated based on the original emission value of nitrogen oxides in the WHTC cycle test of the original engine and the target emission value of nitrogen oxides in the WHTC test of the target faulty part to be manufactured. In step S230, the ratio between the catalytic conversion efficiency of the reference SCR catalytic converter and the catalytic conversion efficiency of the target faulty part to be manufactured has a proportional relationship with the area ratio, and the target area can be obtained through the proportional relationship.

[0048] In the above embodiments, the area ratio is the ratio between the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter and the target area of ​​the catalytic conversion coating of the target faulty component to be manufactured; the value of the ratio is, for example, 0.5, 0.8, 1, 1.2, 1.5 or 2, etc.

[0049] As an example, in step S200, the target area S2 of the catalytic converter coating for the target faulty component to be manufactured is calculated based on the original nitrogen oxide emission value in the WHTC cycle test of the original engine, the tested nitrogen oxide emission value of the reference SCR catalytic converter in the WHTC cycle test of the engine, the target nitrogen oxide emission value of the target faulty component to be manufactured in the WHTC test of the engine, and the effective area S1 of the catalytic converter coating of the reference SCR catalytic converter. This includes:

[0050] S2 = (bc)S1 / (ba);

[0051] In the above formula, a is the test emission value of nitrogen oxides in the engine WHTC cycle test of the reference SCR catalytic converter; b is the original emission value of nitrogen oxides in the WHTC cycle test based on the original engine emission; c is the target emission value of nitrogen oxides in the engine WHTC test of the target faulty part to be manufactured; S1 is the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter.

[0052] As an example, the device for removing a catalytic conversion coating of a predetermined thickness and area includes at least one of a drilling device, an etching device, and a grinding device.

[0053] As an example, the removal device is a drilling device with a single hole area of ​​S0. The execution device removes the catalytic conversion coating of a reference SCR catalytic converter with a preset thickness and preset area, including:

[0054] The drilling device is controlled to drill vertically into the catalytic conversion coating of the reference SCR catalytic converter. The number of holes, n, is calculated according to the following formula:

[0055] n = (S1 - S2) / S0.

[0056] In the above embodiments, the preset thickness is the thickness of the SCR catalytic conversion coating. The main factor affecting the SCR catalytic conversion efficiency is the noble metal content in the SCR catalytic conversion coating. The catalyst is uniformly coated on the carrier of the SCR catalytic converter, and the coating structure is uniformly distributed at every point in the volume. Controlling the drilling depth to be equal to the coating thickness can establish a proportional relationship between the ratio of the catalytic conversion efficiency of the reference SCR catalytic converter and the catalytic conversion efficiency of the target faulty component to be manufactured, and the ratio of the effective volume of the reference SCR catalytic converter to the target volume of the target faulty component to be manufactured. Furthermore, it can establish a proportional relationship with the ratio of the effective area of ​​the reference SCR catalytic converter to the target area of ​​the target faulty component to be manufactured.

[0057] As an example, the raw material selected in this implementation scheme is an SCR catalytic converter with normal catalytic conversion efficiency. A WHTC cycle test was conducted, and the verification result for nitrogen oxides was a = 300 mg / kWh. A WHTC cycle test was also conducted on the original engine emissions, and the verification result was b = 8000 mg / kWh. The catalytic conversion efficiency η1 of the reference SCR catalytic converter was calculated using the following formula:

[0058]

[0059] Based on the formula above, and referring to the catalytic conversion efficiency η1 of the SCR catalytic converter being 96.25%, the WHTC test is conducted on the SCR conversion efficiency failure component. The final nitrogen oxide emission result cannot exceed 20% of the limit. That is, the target nitrogen oxide emission value c of the target failure component in the WHTC test of the engine is generally set between 1200 mg / kWh and 1440 mg / kWh. This implementation plan selects 1250 mg / kWh. The catalytic conversion efficiency η2 of the target failure component to be manufactured is calculated according to the following formula:

[0060]

[0061] According to the formula above, the catalytic conversion efficiency η2 of the target faulty component to be manufactured is 84.38%. The ratio between the catalytic conversion efficiency of the SCR catalytic converter and the catalytic conversion efficiency of the target faulty component to be manufactured has a proportional relationship with the area ratio. This implementation scheme selects a proportional relationship of 1 as an example. According to the following formula, the ratio k between the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter and the target area of ​​the catalytic conversion coating of the target faulty component to be manufactured can be obtained:

[0062]

[0063] According to the formula above, the ratio k is 1.14. Based on this ratio, the target area S2 of the catalytic conversion coating of the target faulty component to be manufactured can be obtained. The catalytic conversion coating of the reference SCR catalytic converter with a preset thickness and area is removed. The efficiency of the SCR low efficiency faulty component is verified on the engine bench. In this implementation case, the manufactured SCR low efficiency faulty component is used for WHTC cycle verification. The test result of nitrogen oxides is 1210mg / kWh, which meets the target requirements.

[0064] Although Figure 2 and Figure 3 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the exact order indicated by the arrows. Unless otherwise specified in this document, there is no strict order in which these steps are executed, and they can be executed in other sequences. Moreover, although Figure 2 and Figure 3 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution of these sub-steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0065] 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. When executed, the computer program can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this disclosure can include non-volatile and / or volatile memory.

[0066] Based on the same inventive concept, this application also provides an SCR low-efficiency component manufacturing apparatus for implementing the above-described method for manufacturing low-efficiency SCR components. The solution provided by this apparatus is similar to the solution described in the above method. Therefore, the specific limitations of one or more SCR low-efficiency component manufacturing apparatus embodiments provided below can be found in the limitations of the SCR low-efficiency component manufacturing method described above, and will not be repeated here.

[0067] Please refer to Figure 4 In one embodiment of this disclosure, an apparatus 900 for manufacturing a low-efficiency SCR faulty component is provided. The apparatus includes a first measurement module 910, a second measurement module 920, and a control module 930. The first measurement module acquires the original nitrogen oxide emission values ​​from a WHTC cycle test of the engine's original emissions, and the test nitrogen oxide emission values ​​from a WHTC cycle test of the engine with a reference SCR catalytic converter. The second measurement module acquires the target nitrogen oxide emission values ​​from a target faulty component to be manufactured in a WHTC test of the engine, and the effective surface area of ​​the catalytic converter coating with a reference SCR catalytic converter. The control module is used to calculate the target area of ​​the catalytic converter coating of the target faulty component to be manufactured based on the original emission value of nitrogen oxides in the WHTC cycle test of the original engine, the test emission value of nitrogen oxides in the WHTC cycle test of the engine with reference SCR catalytic converter, the target emission value of nitrogen oxides in the WHTC test of the target faulty component to be manufactured, the effective area of ​​the catalytic converter coating of the reference SCR catalytic converter, and the preset model, and control the actuator 800 to remove the catalytic converter coating of the reference SCR catalytic converter with preset thickness and preset area to obtain the SCR low efficiency faulty component.

[0068] Please refer to Figure 5 As an example, the control module 930 includes a calculation unit 931, which is used to calculate the catalytic conversion efficiency of the reference SCR catalytic converter based on the test emission value of nitrogen oxides in the WHTC cycle test of the engine using the reference SCR catalytic converter and the original emission value of nitrogen oxides in the WHTC cycle test of the original engine emission; calculate the catalytic conversion efficiency of the target faulty part to be manufactured based on the original emission value of nitrogen oxides in the WHTC cycle test of the original engine emission and the target emission value of nitrogen oxides in the WHTC test of the target faulty part to be manufactured; and calculate the target area of ​​the catalytic conversion coating of the target faulty part to be manufactured based on the ratio of the catalytic conversion efficiency of the reference SCR catalytic converter to the catalytic conversion efficiency of the target faulty part to be manufactured and the ratio of the area.

[0069] Each module in the aforementioned SCR low-efficiency failure component manufacturing device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0070] As an example, the execution device 800 includes at least one of a drilling device, an etching device, and a grinding device. The drilling device can be a vertical drilling device with a fixed area S0, and the etching device can be a laser etching device.

[0071] In the SCR low-efficiency faulty component manufacturing device described in the above embodiments, the first measurement module, the second measurement module, and the control module cooperate with each other. By measuring the original nitrogen oxide emission value in the WHTC cycle test of the original engine, the nitrogen oxide test emission value of the engine in the WHTC cycle test with the reference SCR catalytic converter, the target nitrogen oxide emission value of the target faulty component to be manufactured in the WHTC test of the engine, and the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter, the calculation unit in the control module calculates the target area of ​​the catalytic conversion coating of the target faulty component to be manufactured. The execution device removes the catalytic conversion coating of the SCR catalytic converter with a preset thickness and a preset area to obtain the SCR low-efficiency faulty component. This accurately controls the nitrogen oxide emission value of the SCR faulty component within the required range. Without measurement errors, it avoids multiple WHTC test verifications of the SCR low-efficiency faulty component, improves manufacturing efficiency, and allows for the selection of various execution devices without special equipment restrictions, reducing the cost and difficulty of manufacturing faulty components.

[0072] In one embodiment of this disclosure, an apparatus for manufacturing low-efficiency SCR components is provided, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor executes the program, it implements the steps of the method described in any embodiment of this disclosure.

[0073] In one embodiment of this disclosure, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any embodiment of this disclosure.

[0074] Please note that the above embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0075] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0076] 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.

[0077] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for manufacturing a faulty component for SCR conversion efficiency, characterized in that, include: Obtain the original nitrogen oxide emission values ​​in the WHTC cycle test of the original engine emissions, and refer to the test nitrogen oxide emission values ​​of the SCR catalytic converter in the WHTC cycle test of the engine; Obtain the target nitrogen emission value of the target faulty component to be manufactured in the WHTC test of the engine, and the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter; Based on the original emission value, the test emission value, the target emission value, the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter, and the preset model, the target area of ​​the catalytic conversion coating of the target faulty component is calculated, and the actuator is controlled to remove the catalytic conversion coating of the reference SCR catalytic converter of preset thickness and preset area to obtain the target faulty component; The preset thickness is the thickness of the catalytic conversion coating of the reference SCR catalytic converter, and the preset area is related to the difference between the effective area and the target area; The pre-defined model establishes the correspondence between the target nitrogen emission value of the engine during the WHTC test for the target faulty component to be manufactured and the target area of ​​the catalytic conversion coating of the target faulty component.

2. The method according to claim 1, characterized in that, The calculation of the target area of ​​the catalytic conversion coating of the target faulty component includes: The catalytic conversion efficiency of the reference SCR catalytic converter is calculated based on the test emission values ​​and the raw emission values. The catalytic conversion efficiency of the target faulty component is calculated based on the target emission value and the original emission value. The target area is calculated based on the ratio of the catalytic conversion efficiency of the reference SCR catalytic converter to the catalytic conversion efficiency of the target faulty component, and the ratio of their areas; the area ratio is the ratio of the effective area to the target area.

3. The method according to claim 1, characterized in that, The target area S2 of the catalytic conversion coating of the target faulty component is calculated according to the following formula: S2 = (bc)S1 / (ba); In the above formula, a is the test emission value; b is the original emission value; c is the target emission value; and S1 is the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter.

4. The method according to any one of claims 1-3, characterized in that, The actuator includes at least one of a drilling device, an etching device, and a grinding device.

5. The method according to claim 3, characterized in that, The actuator is a drilling device and the area of ​​a single hole is S0; The control execution device removes the catalytic conversion coating of the reference SCR catalytic converter of a preset thickness and preset area, including: The drilling device is controlled to vertically drill holes in the catalytic conversion coating of the reference SCR catalytic converter. The drilling depth is equal to the thickness of the catalytic conversion coating, and the number of holes, n, is calculated according to the following formula: n = (S1 - S2) / S0.

6. An apparatus for manufacturing SCR conversion efficiency faulty components, characterized in that, include: The first measurement module is used to obtain the original emission value of nitrogen oxides in the original engine emission WHTC cycle test, and the test emission value of nitrogen oxides in the engine WHTC cycle test with reference to the SCR catalytic converter; The second measurement module is used to obtain the target nitrogen emission value of the target faulty component to be manufactured in the WHTC test of the engine, as well as the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter. The control module is used to calculate the target area of ​​the catalytic conversion coating of the target faulty component based on the original emission value, the test emission value, the target emission value, the effective area of ​​the catalytic conversion coating of the reference SCR catalytic converter, and a preset model, and to control the execution device to remove the catalytic conversion coating of the reference SCR catalytic converter of preset thickness and preset area to obtain the target faulty component; The preset thickness is the thickness of the catalytic conversion coating of the reference SCR catalytic converter, and the preset area is related to the difference between the effective area and the target area; The pre-defined model establishes the correspondence between the target nitrogen emission value of the engine during the WHTC test for the target faulty component to be manufactured and the target area of ​​the catalytic conversion coating of the target faulty component.

7. The apparatus according to claim 6, characterized in that, The control module includes: The calculation unit is used to calculate the catalytic conversion efficiency of the reference SCR catalytic converter based on the test emission value and the original emission value, calculate the catalytic conversion efficiency of the target faulty component based on the target emission value and the original emission value, and calculate the target area based on the ratio of the catalytic conversion efficiency of the reference SCR catalytic converter to the catalytic conversion efficiency of the target faulty component, and the ratio of the area ratio; the area ratio is the ratio of the effective area to the target area.

8. The apparatus according to claim 6 or 7, characterized in that, The actuator includes at least one of a drilling device, an etching device, and a grinding device.

9. A faulty component manufacturing apparatus, 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 5.

10. 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 5.

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