A method, device and storage medium for identifying and processing high-sulfur fuel

Abstract

The present invention relates to the technical field of engine after-treatment, and discloses a fuel high-sulfur identification and treatment method, device and storage medium. The method includes: monitoring engine operating parameters, including nitrogen oxide conversion efficiency, exhaust temperature, and urea injection amount; comparing the monitored value of the nitrogen oxide conversion efficiency with the standard value of the nitrogen oxide conversion efficiency. If the deviation rate between the monitored value and the standard value reaches a set threshold, troubleshoot the cause of the failure of the nitrogen oxide conversion efficiency exceeding the standard. When the cause of the failure is locked as the fuel sulfur content exceeding the standard, trigger a sulfur regeneration request; conduct a regeneration demand analysis according to the sulfur regeneration request, and judge whether to pass the sulfur regeneration request based on the regeneration demand analysis. If the sulfur regeneration request passes, perform desulfurization treatment in a forced regeneration manner. During the use of the vehicle, the present invention can timely detect whether the fuel sulfur content exceeds the standard, timely process the fuel sulfur content exceeding the standard, avoid the poisoning of the engine after-treatment device caused by the fuel sulfur content exceeding the standard, and reduce losses.

Description

Technical Field

[0001] The present invention relates to the technical field of engine after-treatment, and particularly to a method and device for identifying and treating high-sulfur fuel and a storage medium. Background Art

[0002] At present, most domestic diesel commercial vehicle exhaust gas purification devices adopt an emission technical route of Diesel Oxidation Catalyst (DOC) + Diesel Particle Filter (DPF) + Selective Catalytic Reduction (SCR) + Ammonia Slip Catalyst (ASC) to purify the emission pollutants of diesel engines. However, limited by the existing technical level, copper-based molecular sieve materials are used in both SCR and ASC, and expensive noble metal materials platinum and palladium are also used as catalyst materials in DOC and ASC.

[0003] During use, if the sulfur content in the fuel is too high, the content of sulfides in the exhaust gas after engine combustion is also correspondingly high. Sulfur will react with the copper-based material in SCR to form substances such as ammonium sulfate and copper sulfate, which adhere to the surface of the converter catalyst coating, thus affecting the purification effect of the engine after-treatment device. In addition, sulfur will also interact with the noble metal platinum to form various sulfides such as Pt2S, PtS, and PtS2, thereby causing the catalyst to lose its activity, that is, noble metal poisoning, and making the after-treatment device lose its efficacy and be scrapped. Therefore, it is necessary to control the sulfur content in the fuel.

[0004] However, during vehicle use, due to its large mobility, it is often necessary to refuel in different regions. Some users, for the reason of reducing usage costs, will also refuel with fuel of unknown origin at some individual gas stations. Due to technical level reasons, sulfur content detection sensors cannot be configured on vehicles temporarily, and it is difficult for users to identify whether the sulfur content of the refueled fuel exceeds the standard. It often occurs that only after the engine after-treatment device is poisoned and fails due to the use of inferior fuel is it discovered, but the losses caused are irreparable. Therefore, there is an urgent need for a method to detect, judge, and process in real time whether the sulfur content of the fuel exceeds the standard during vehicle use to reduce losses. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and device for identifying and treating high-sulfur fuel and a storage medium, so as to be able to detect, judge, and process in real time whether the sulfur content of the fuel exceeds the standard during vehicle use.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention is to provide a method for identifying and processing high-sulfur fuel, including:

[0008] Step S1, monitoring the engine operating parameters, where the engine operating parameters include the nitrogen oxide conversion efficiency, the engine exhaust temperature, and the urea injection amount;

[0009] Step S2, comparing the monitored value of the nitrogen oxide conversion efficiency with the standard value of the nitrogen oxide conversion efficiency. If the deviation rate between the monitored value and the standard value reaches the set threshold, then proceed to step S3;

[0010] Step S3, troubleshooting the cause of the failure of the nitrogen oxide conversion efficiency exceeding the standard. When the cause of the failure is locked as the sulfur content in the fuel exceeding the standard, proceed to step S4;

[0011] Step S4, triggering a sulfur regeneration request;

[0012] Step S5, performing a regeneration demand analysis based on the sulfur regeneration request, and judging whether to pass the sulfur regeneration request according to the regeneration demand analysis. If the sulfur regeneration request passes, then proceed to step S6;

[0013] Step S6, performing desulfurization treatment in a forced regeneration manner.

[0014] Preferably, the step S3 includes: sequentially troubleshooting whether each hardware component of the engine after-treatment device is faulty according to the set order. If none of the hardware components of the engine after-treatment device fails, then lock the cause of the failure as the sulfur content in the fuel exceeding the standard.

[0015] Preferably, in the step S4, the conditions for triggering the sulfur regeneration request include: the time interval from the last passing of the sulfur regeneration request is not less than the first set value, the fuel consumption interval from the last passing of the sulfur regeneration request is not less than the second set value, and the conversion efficiency fluctuation interval from the last passing of the sulfur regeneration request is not less than the third set value.

[0016] Preferably, in the step S5, the step of judging whether to pass the sulfur regeneration request according to the regeneration demand analysis includes:

[0017] Step S51, obtaining the regeneration accumulated time, the regeneration accumulated mileage, and the regeneration accumulated fuel amount through a regeneration counter;

[0018] Step S52, passing the sulfur regeneration request when the regeneration accumulated time is greater than the fourth set value, or the regeneration accumulated mileage is greater than the fifth set value, or the regeneration accumulated fuel amount is greater than the sixth set value.

[0019] Preferably, before the step S52, it further includes: obtaining the carbon accumulation amount. When the carbon accumulation amount exceeds the set threshold, passing the sulfur regeneration request, and the regeneration counter is cleared to enter the next counting cycle.

[0020] Preferably, after the step that the sulfur regeneration request passes in step S5, a fault and torque limit warning is further issued through the vehicle instrument.

[0021] Preferably, before step S1, it further includes: measuring the change curve graph of each engine operating parameter at different fuel consumption rates as the standard comparison curve; obtaining the standard value of the nitrogen oxide conversion efficiency according to the standard comparison curve.

[0022] The second aspect of the present invention is to provide a fuel high-sulfur identification and processing device, including a processor and a memory communicatively connected to the processor. The memory stores programs or instructions, and the programs or instructions are executed by the processor so that the processor can execute the steps of the fuel high-sulfur identification and processing method as described above.

[0023] The third aspect of the present invention is to provide a storage medium. The storage medium stores programs or instructions, and when the programs or instructions are executed by a processor, the steps of the fuel high-sulfur identification and processing method as described above are implemented.

[0024] Compared with the prior art, the fuel high-sulfur identification and processing method, device and storage medium in the embodiments of the present invention have the beneficial effects that:

[0025] In the fuel high-sulfur identification and processing method in the embodiments of the present invention, during the vehicle operation, the engine operating parameters are monitored in real time, and the monitored values are compared with the standard values. When the deviation rate between the monitored values and the standard values reaches the set threshold, it indicates that there is a problem with the nitrogen oxide conversion efficiency, and it may be that the sulfur content in the fuel exceeds the standard. At this time, by troubleshooting the cause of the fault, it can be determined whether the cause of the fault is that the sulfur content in the fuel exceeds the standard, so that during the vehicle use, it can also be timely found whether the sulfur content in the fuel exceeds the standard. By triggering the sulfur regeneration request and performing desulfurization treatment in a forced regeneration manner, the problem of excessive sulfur content in the fuel can be timely processed, avoiding the poisoning of the engine post-processor caused by excessive sulfur content in the fuel and reducing losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic flow chart of the fuel high-sulfur identification and processing method in the embodiments of the present invention. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0029] As Figure 1 shown, a method for identifying and processing high-sulfur fuel in an embodiment of the present invention includes the following steps:

[0030] Step S1, monitor the engine operating parameters during vehicle use. The engine operating parameters include nitrogen oxide conversion efficiency (hereinafter referred to as NOx conversion efficiency), engine exhaust temperature, and urea injection amount;

[0031] Step S2, compare the monitored value of the NOx conversion efficiency with the standard value of the NOx conversion efficiency. If the deviation rate between the monitored value and the standard value reaches the set threshold, proceed to Step S3; in this embodiment, the set threshold is 12%; if the deviation rate between the monitored value and the standard value does not reach the set threshold, indicating that the change in the NOx conversion efficiency is within the normal range, return to execute Step S1; when using high-sulfur fuel, it will cause a decrease in the NOx conversion efficiency. Therefore, by monitoring the change in the NOx conversion efficiency, it can be obtained whether high-sulfur fuel is used;

[0032] Step S3, troubleshoot the cause of the failure of the nitrogen oxide conversion efficiency exceeding the standard. When the cause of the failure is locked as the sulfur content in the fuel exceeding the standard, proceed to Step S4; when the cause of the failure is caused by other component failures, handle it according to the corresponding troubleshooting process and return to execute Step S1;

[0033] Step S4, trigger a sulfur regeneration request;

[0034] Step S5, perform a regeneration demand analysis based on the sulfur regeneration request. Determine whether to pass the sulfur regeneration request according to the regeneration demand analysis. If the sulfur regeneration request passes, proceed to Step S6; if the sulfur regeneration request does not pass, continue the regeneration request analysis until the sulfur regeneration request meets the passing conditions;

[0035] Step S6, perform desulfurization treatment in a forced regeneration manner. Specifically, measures such as adjusting the fuel injection time and injection duration can be adopted to increase the exhaust temperature, burn off sulfides through high temperature, thereby restoring the function of the engine aftertreatment device and restoring the NOx conversion efficiency.

[0036] In the present invention, during the operation of the vehicle, the operating parameters of the engine are monitored in real time, and the monitored values are compared with the standard values. When the deviation rate between the monitored value and the standard value reaches the set threshold, it indicates that there is a problem with the nitrogen oxide conversion efficiency, and it is possible that the sulfur content in the fuel exceeds the standard. At this time, by troubleshooting the cause of the failure, it is possible to determine whether the cause of the failure is the excessive sulfur content in the fuel, so that during the use of the vehicle, it is also possible to timely detect whether the sulfur content in the fuel exceeds the standard. By triggering a sulfur regeneration request and performing desulfurization treatment in a forced regeneration manner, the excessive sulfur content in the fuel can be timely treated, avoiding the poisoning of the engine post-processor caused by the excessive sulfur content in the fuel and reducing losses. Moreover, in the present invention, there is no need to configure a physical fuel sulfur content sensor, which saves costs and can provide protection for users during the use of fuels with unknown quality, reducing the use cost of repairing and replacing the post-processor caused by sulfur poisoning damage.

[0037] In this embodiment, before the step S1, it further includes: under the normal operating conditions of the engine, measuring the change curves of the operating parameters of the engine at different fuel consumption rates as the standard comparison curves; and obtaining the standard values of the nitrogen oxide conversion efficiency according to the standard comparison curves. It is convenient to troubleshoot the failure through the change curves of the operating parameters of the engine.

[0038] In this embodiment, the step S3 includes: sequentially checking whether each hardware component of the engine post-processor is faulty in the set order, and detecting and troubleshooting each possible cause of the decrease in NOx conversion efficiency item by item; if none of the hardware components of the engine post-processor fails, then lock the cause of the failure as the excessive sulfur content in the fuel. Among them, the hardware components of the engine post-treatment include urea nozzles, urea pumps, NOx sensors, urea quality sensors, exhaust gas recirculation valves, turbochargers, etc. For example, when the deviation rate between the NOx conversion efficiency and the standard value reaches 12%, check whether the NOx sensor is faulty. If the NOx sensor is faulty, report the NOx fault and process it according to the NOx fault troubleshooting process; if the NOx sensor is not faulty, then check whether the urea quality sensor is faulty. If the urea quality sensor is faulty, report the urea quality sensor fault and process it according to the urea quality sensor fault troubleshooting process; if the urea quality sensor is not faulty, then check whether the exhaust gas recirculation valve is faulty, and so on, sequentially checking whether each hardware component of the engine post-treatment is faulty. If none of the hardware components of the engine post-treatment fails, then determine that the failure is caused by using high-sulfur fuel.

[0039] Further, after locking the cause of the failure as the excessive sulfur content in the fuel, it further includes issuing an alarm to warn of the high-sulfur fuel failure.

[0040] Since sulfur regeneration consumes additional fuel and affects the operation of the vehicle, to avoid frequent regeneration, in step S4, the conditions for triggering a sulfur regeneration request include: the time interval since the last sulfur regeneration request was passed is not less than a first set value, the fuel consumption interval since the last sulfur regeneration request was passed is not less than a second set value, and the conversion efficiency fluctuation interval since the last sulfur regeneration request was passed is not less than a third set value. Among them, the first set value is 12 hours, the second set value is 600 liters, and the third set value is 8%. When all the above conditions are met, a sulfur regeneration request is generated. The settings of the first set value, the second set value, and the third set value are determined by comprehensively evaluating the collected vehicle usage conditions, taking into account the torque limit requirements of emission regulations, and through comprehensive tests considering the reliability life of the post-processor, vehicle fuel consumption, and driver driving experience.

[0041] In this embodiment, in step S5, the steps of analyzing and judging whether to pass the sulfur regeneration request according to the regeneration demand include:

[0042] Step S51, obtaining the cumulative regeneration time, cumulative regeneration mileage, and cumulative regeneration fuel consumption through a regeneration counter;

[0043] Step S52, when the cumulative regeneration time is greater than a fourth set value, or the cumulative regeneration mileage is greater than a fifth set value, or the cumulative regeneration fuel consumption is greater than a sixth set value, pass the sulfur regeneration request to avoid the adverse troubles brought by frequent regeneration to the normal use of users and the deterioration of the overall vehicle economy. When one of the above three conditions is met, coordinate to pass the sulfur regeneration request through the regeneration mode, trigger the desulfurization mode, and enter step S6 for desulfurization treatment. Among them, the fourth set value is 40 hours, the fifth set value is 3000 km, and the sixth set value is 1000 liters. The cumulative regeneration time is determined by the daily operation time of the vehicle. If the daily operation time of the vehicle is 12 - 13 hours, the cumulative time for 3 days is about 40 hours; the cumulative regeneration mileage is determined by the cumulative regeneration time and the average vehicle speed. When the cumulative regeneration time is 40 hours and the average vehicle speed is 70 - 75 km / h, the cumulative regeneration mileage is about 3000 km; the cumulative regeneration fuel consumption is determined according to the cumulative regeneration mileage and the average fuel consumption. When the cumulative regeneration mileage is 3000 km and the average fuel consumption is 30 - 32 liters per 100 km, the cumulative regeneration fuel consumption is about 1000 liters.

[0044] Further, before step S52, it also includes: obtaining the carbon accumulation amount. When the carbon accumulation amount exceeds the set threshold, pass the sulfur regeneration request, and the regeneration counter is cleared to enter the next counting cycle. When the carbon accumulation amount is large, resulting in too large a pressure difference and affecting the normal operation of the engine, it is necessary to give priority to entering regeneration. After entering regeneration, the regeneration counter is cleared, and step S51 is restarted to avoid repeated regeneration after reaching the conditions of step S52.

[0045] In this embodiment, after the step where the sulfur regeneration request passes in step S5, it further includes issuing a fault and torque limit warning through the vehicle instrument to remind the driver to fill up with qualified fuel.

[0046] The fuel high-sulfur identification and processing device of the present invention includes a processor and a memory communicatively connected to the processor. The memory stores programs or instructions, and the programs or instructions are executed by the processor so that the processor can execute the steps of the fuel high-sulfur identification and processing method as described above, specifically including:

[0047] Step S1, monitoring the engine operating parameters, where the engine operating parameters include nitrogen oxide conversion efficiency, engine exhaust temperature, and urea injection amount;

[0048] Step S2, comparing the monitored value of the nitrogen oxide conversion efficiency with the standard value of the nitrogen oxide conversion efficiency. If the deviation rate between the monitored value and the standard value reaches the set threshold, then proceed to step S3;

[0049] Step S3, troubleshooting the cause of the fault where the nitrogen oxide conversion efficiency exceeds the standard. When the fault cause is locked as the sulfur content in the fuel exceeding the standard, proceed to step S4;

[0050] Step S4, triggering a sulfur regeneration request;

[0051] Step S5, performing a regeneration demand analysis based on the sulfur regeneration request, and judging whether the sulfur regeneration request passes according to the regeneration demand analysis. If the sulfur regeneration request passes, then proceed to step S6;

[0052] Step S6, performing desulfurization treatment in a forced regeneration manner.

[0053] Wherein, the memory includes at least one type of readable storage medium, and the readable storage medium includes flash memory, mobile hard disks, card-type memories (such as SD or DX memories, etc.), magnetic disks, optical disks, etc. The memory can be the internal storage unit of the device in some embodiments. The memory can also be an external storage device in other embodiments, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory can also include both an internal storage unit and an external storage device. The memory can be used not only to store installed application software and various types of data, such as the code of the control program for fuel high-sulfur identification and processing, but also to temporarily store data that has been output or will be output.

[0054] In some embodiments, the processor may be composed of an integrated circuit. For example, it may be composed of a single packaged integrated circuit, or may be composed of multiple packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, etc. The processor executes the programs stored in the memory and calls the data stored in the memory to perform various functions and process data.

[0055] It should be noted that the other specific embodiments of the fuel high-sulfur identification processing device of the present invention are the same as the specific embodiments of the above-mentioned fuel high-sulfur identification processing method, and will not be elaborated here one by one.

[0056] The present invention also provides a storage medium storing programs or instructions, which, when executed by a processor, implement the steps of the fuel high-sulfur identification processing method as described above.

[0057] It should be noted that the other specific embodiments of the storage medium of the present invention are the same as the specific embodiments of the above-mentioned fuel high-sulfur identification processing device and method, and will not be elaborated here one by one.

[0058] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A method for identifying and treating high sulfur in fuel, characterized in that, Including: Step S1, monitor the engine operating parameters, where the engine operating parameters include nitrogen oxide conversion efficiency, engine exhaust temperature, and urea injection amount; Step S2, compare the monitored value of the nitrogen oxide conversion efficiency with the standard value of the nitrogen oxide conversion efficiency. If the deviation rate between the monitored value and the standard value reaches the set threshold, proceed to Step S3; Step S3, troubleshoot the cause of the failure of the nitrogen oxide conversion efficiency exceeding the standard. When the cause of the failure is locked as the sulfur content in the fuel exceeding the standard, proceed to Step S4; Step S4, trigger a sulfur regeneration request; Step S5, conduct a regeneration demand analysis based on the sulfur regeneration request, and determine whether to pass the sulfur regeneration request according to the regeneration demand analysis. If the sulfur regeneration request passes, proceed to Step S6; Step S6, perform desulfurization treatment in a forced regeneration manner; In the said Step S4, the conditions for triggering the sulfur regeneration request include: the time interval since the last sulfur regeneration request passed is not less than the first set value, the fuel consumption interval since the last sulfur regeneration request passed is not less than the second set value, and the conversion efficiency fluctuation interval since the last sulfur regeneration request passed is not less than the third set value; the first set value is 12 hours, the second set value is 600 liters, and the third set value is 8%.

2. The fuel high-sulfur identification and processing method according to claim 1, wherein The said Step S3 includes: sequentially check whether each hardware component of the engine after - processor is faulty according to the set order. If none of the hardware components of the engine after - processor are faulty, lock the cause of the failure as the sulfur content in the fuel exceeding the standard.

3. The fuel high-sulfur identification and processing method according to claim 1, characterized in that In the said Step S5, the step of determining whether to pass the sulfur regeneration request according to the regeneration demand analysis includes: Step S51, obtain the regeneration accumulated time, regeneration accumulated mileage, and regeneration accumulated fuel amount through a regeneration counter; Step S52, when the regeneration accumulated time is greater than the fourth set value, or the regeneration accumulated mileage is greater than the fifth set value, or the regeneration accumulated fuel amount is greater than the sixth set value, pass the sulfur regeneration request.

4. The fuel high-sulfur identification and processing method according to claim 3, wherein Before the said Step S52, it also includes: obtain the carbon accumulation amount. When the carbon accumulation amount exceeds the set threshold, pass the sulfur regeneration request, and the regeneration counter is cleared to enter the next counting cycle.

5. The fuel high-sulfur identification and processing method according to claim 1, wherein After the step of passing the sulfur regeneration request in the said Step S5, it also includes issuing a fault and torque limit warning through the vehicle instrument.

6. The fuel high-sulfur identification and processing method according to claim 1, characterized in that Before the said Step S1, it also includes: measure the change curve graph of each engine operating parameter at different fuel consumption rates as the standard comparison curve; obtain the standard value of the nitrogen oxide conversion efficiency according to the standard comparison curve.

7. A fuel high-sulfur identification and treatment device, characterized in that, Including a processor and a memory communicatively connected to the processor, where the memory stores programs or instructions, and the programs or instructions are executed by the processor so that the processor can execute the steps of the fuel high - sulfur identification processing method according to any one of claims 1 - 6.

8. A storage medium, characterized in that, The storage medium stores programs or instructions, and when the programs or instructions are executed by a processor, the steps of the fuel high - sulfur identification processing method according to any one of claims 1 - 6 are implemented.

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