CN115750084A - Fuel oil high-sulfur recognition processing method and device and storage medium - Google Patents
Fuel oil high-sulfur recognition processing method and device and storage medium Download PDFInfo
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- CN115750084A CN115750084A CN202211365505.9A CN202211365505A CN115750084A CN 115750084 A CN115750084 A CN 115750084A CN 202211365505 A CN202211365505 A CN 202211365505A CN 115750084 A CN115750084 A CN 115750084A
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Abstract
The invention relates to the technical field of engine post-processing, and discloses a fuel oil high-sulfur identification processing method, a device and a storage medium, wherein the method comprises the following steps: monitoring engine operating parameters including nitrogen oxide conversion efficiency, exhaust temperature, urea injection amount; comparing the monitoring value of the nitrogen oxide conversion efficiency with the standard value of the nitrogen oxide conversion efficiency, if the deviation rate of the monitoring value and the standard value reaches a set threshold value, checking the fault reason that the nitrogen oxide conversion efficiency exceeds the standard, and triggering a sulfur regeneration request when the fault reason is locked because the sulfur content of the fuel oil exceeds the standard; and analyzing the regeneration requirement according to the sulfur regeneration request, judging whether the sulfur regeneration request passes or not according to the regeneration requirement analysis, and if the sulfur regeneration request passes, performing desulfurization treatment in a forced regeneration mode. When the device is used in a vehicle, whether the sulfur content of the fuel exceeds the standard or not can be found in time, the exceeding of the sulfur content of the fuel is treated in time, the poisoning of an engine postprocessor caused by the exceeding of the sulfur content of the fuel is avoided, and the loss is reduced.
Description
Technical Field
The invention relates to the technical field of engine post-processing, in particular to a fuel oil high-sulfur identification processing method, a fuel oil high-sulfur identification processing device and a storage medium.
Background
At present, most of Diesel commercial vehicle tail gas purification devices in China adopt an emission technical route of an Oxidation Catalyst (DOC), a wall-flow type Particle trap (DPF), a Selective Catalytic Reduction (SCR) and an Ammonia Slip Catalyst (ASC) to purify pollutants discharged from a Diesel engine. However, limited to the state of the art, 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.
During use, if the sulfur content in the fuel is too high, the content of sulfides in the exhaust gas after engine combustion is correspondingly high. And sulfur and SCR copper-based materials can generate ammonium sulfate, copper sulfate and other substances which are attached to the surface of the catalyst coating of the converter, so that the purification effect of the post-processor of the engine is influenced. In addition, sulfur also interacts with noble metal platinum to form Pt 2 S, ptS and PtS 2 And the like, thereby leading the catalyst to lose activity, namely poisoning the noble metal, leading the post-processor to lose efficacy and be scrapped. Therefore, there is a need to control the sulfur content in fuel.
However, in the use process of the vehicle, the mobility is high, the fuel is required to be added in different regions frequently, and some users can add fuel with unknown sources to individual fuel adding points based on the reason of reducing the use cost. Due to the technical level, a sulfur content detection sensor cannot be arranged on the vehicle, and a user cannot identify the filled fuel oil and whether the sulfur content exceeds the standard or not. The use of inferior fuel is often found after the poisoning failure of an engine postprocessor, but the loss caused by the poisoning failure is irreparable. Therefore, a method for detecting and determining whether the sulfur content of fuel exceeds the standard in real time and processing the sulfur content in the fuel in the using process of a vehicle is needed to reduce the loss.
Disclosure of Invention
The invention aims to provide a fuel oil high-sulfur recognition processing method, a fuel oil high-sulfur recognition processing device and a storage medium, which can detect and judge whether the sulfur content of fuel oil exceeds the standard in real time and process the fuel oil in the using process of a vehicle.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first aspect of the invention provides a fuel oil high-sulfur identification processing method, which comprises the following steps:
step S1, monitoring engine operation parameters, wherein the engine operation parameters comprise nitrogen oxide conversion efficiency, engine exhaust temperature and urea injection quantity;
s2, comparing the monitoring value of the nitrogen oxide conversion efficiency with the standard value of the nitrogen oxide conversion efficiency, and if the deviation ratio of the monitoring value and the standard value reaches a set threshold value, performing S3;
s3, troubleshooting the fault reason that the conversion efficiency of the nitrogen oxide exceeds the standard, and when the locking fault reason is that the sulfur content of the fuel oil exceeds the standard, performing the step S4;
s4, triggering a sulfur regeneration request;
step S5, analyzing the regeneration requirement according to the sulfur regeneration request, judging whether the sulfur regeneration request passes through according to the regeneration requirement analysis, and if the sulfur regeneration request passes through, performing step S6;
and step S6, carrying out desulfurization treatment in a forced regeneration mode.
Preferably, the step S3 includes: and sequentially checking whether each hardware component of the engine postprocessor fails according to a set sequence, wherein if no hardware component of the engine postprocessor fails, the locking failure is caused by the fact that the sulfur content of the fuel oil exceeds the standard.
Preferably, in step S4, the condition for triggering the sulfur regeneration request includes: the time interval from the last passage of the sulfur regeneration request is not less than a first set value, the fuel consumption interval from the last passage of the sulfur regeneration request is not less than a second set value, and the conversion efficiency fluctuation interval from the last passage of the sulfur regeneration request is not less than a third set value.
Preferably, the step S5 of analyzing and judging whether the request for sulfur regeneration is passed according to the regeneration requirement includes:
step S51, acquiring regeneration accumulation time, regeneration accumulation mileage and regeneration accumulation oil quantity through a regeneration counter;
and S52, when the regeneration accumulation time is larger than a fourth set value, or the regeneration accumulation mileage is larger than a fifth set value, or the regeneration accumulation oil amount is larger than a sixth set value, passing a sulfur regeneration request.
Preferably, before step S52, the method further includes: and acquiring the carbon accumulation amount, and when the carbon accumulation amount exceeds a set threshold value, clearing the regeneration counter to enter the next counting period through a sulfur regeneration request.
Preferably, in the step S5, after the step of passing the sulfur regeneration request, the method further includes issuing a fault and torque limit warning through a vehicle instrument.
Preferably, before the step S1, the method further includes: measuring a change curve chart of each operating parameter of the engine under different fuel consumption rates as a standard comparison curve; and obtaining a standard value of the nitrogen oxide conversion efficiency according to the standard comparison curve.
A second aspect of the present invention provides a fuel high-sulfur identification processing device, which includes a processor and a memory communicatively connected to the processor, where the memory stores a program or instructions, and the program or instructions are executed by the processor, so as to enable the processor to execute the steps of the fuel high-sulfur identification processing method.
A third aspect of the present invention is to provide a storage medium, which stores a program or instructions, and the program or instructions, when executed by a processor, implement the steps of the fuel high sulfur identification processing method as described above.
Compared with the prior art, the fuel oil high-sulfur identification processing method, the fuel oil high-sulfur identification processing device and the storage medium have the advantages that:
according to the fuel oil high-sulfur identification processing method provided by the embodiment of the invention, the operation parameters of the engine are monitored in real time in the vehicle operation process, the monitored value is compared with the standard value, when the deviation rate of the monitored value and the standard value reaches the set threshold value, the problem that the nitrogen oxide conversion efficiency is in problem and the problem that the sulfur content of the fuel oil exceeds the standard can be shown, at the moment, the fault reason is checked, whether the sulfur content of the fuel oil exceeds the standard can be locked, and therefore, whether the sulfur content of the fuel oil exceeds the standard can be timely found in the vehicle use process. By triggering the sulfur regeneration request and carrying out desulfurization treatment in a forced regeneration mode, the sulfur content of the fuel can be timely treated, the poisoning of an engine postprocessor caused by the over-standard sulfur content of the fuel is avoided, and the loss is reduced.
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FIG. 1 is a schematic flow chart of a fuel high-sulfur identification processing method according to an embodiment of the invention.
Detailed Description
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, a fuel high sulfur identification processing method according to an embodiment of the present invention includes the following steps:
step S1, monitoring engine operation parameters in the using process of a vehicle, wherein the engine operation parameters comprise nitrogen oxide conversion efficiency (hereinafter referred to as NOx conversion efficiency), engine exhaust temperature and urea injection quantity;
s2, comparing the monitoring value of the NOx conversion efficiency with a standard value of the NOx conversion efficiency, and if the deviation rate of the monitoring value and the standard value reaches a set threshold value, performing S3; in this embodiment, the threshold is set to 12%; if the deviation rate of the monitoring value and the standard value does not reach the set threshold value, indicating that the change of the NOx conversion efficiency is within the normal range, returning to execute the step S1; when high-sulfur fuel is used, the NOx conversion efficiency is reduced, so that whether the high-sulfur fuel is used or not can be obtained by monitoring the change of the NOx conversion efficiency;
s3, troubleshooting the fault reason that the conversion efficiency of the nitrogen oxide exceeds the standard, and when the locking fault reason is that the sulfur content of the fuel oil exceeds the standard, performing the step S4; when the fault reason is caused by faults of other parts, processing according to the corresponding fault elimination process, and returning to execute the step S1;
s4, triggering a sulfur regeneration request;
step S5, analyzing the regeneration requirement according to the sulfur regeneration request, judging whether the sulfur regeneration request passes through according to the regeneration requirement analysis, and if the sulfur regeneration request passes through, performing step S6; if the sulfur regeneration request does not pass, continuing to analyze the regeneration request until the sulfur regeneration request meets the passing condition;
and S6, carrying out desulfurization treatment in a forced regeneration mode, specifically adopting measures of adjusting fuel injection time, injection duration and the like, increasing exhaust temperature, and burning sulfide at high temperature, so that the function of an engine postprocessor is recovered, and the NOx conversion efficiency is recovered.
In the invention, during the running process of the vehicle, the running parameters of the engine are monitored in real time, the monitored value is compared with the standard value, when the deviation rate of the monitored value and the standard value reaches a set threshold value, the problem of the conversion efficiency of nitrogen oxides is shown, and the problem of the standard exceeding of the sulfur content of the fuel oil possibly occurs, at the moment, whether the fault reason is the standard exceeding of the sulfur content of the fuel oil can be locked by checking the fault reason, so that whether the sulfur content of the fuel oil exceeds the standard can be found in time during the use process of the vehicle. By triggering the sulfur regeneration request and carrying out desulfurization treatment in a forced regeneration mode, the sulfur content of the fuel can be timely treated, the poisoning of an engine postprocessor caused by the excessive sulfur content of the fuel is avoided, and the loss is reduced. In addition, the fuel oil sulfur content sensor in a physical form does not need to be configured, so that the cost is saved, the guarantee can be provided for a user in the process of using the fuel oil with unknown quality, and the use cost of maintaining and replacing the post-processor due to sulfur poisoning damage is reduced.
In this embodiment, before the step S1, the method further includes: under the normal working condition of the engine, measuring the change curve of each operating parameter of the engine under different fuel consumption rates as a standard comparison curve; and obtaining a standard value of the nitrogen oxide conversion efficiency according to the standard comparison curve. The faults are conveniently checked through a change curve graph of each operating parameter of the engine.
In this embodiment, the step S3 includes: sequentially checking whether each hardware component of the engine postprocessor fails according to a set sequence, and detecting and checking various possible reasons for reducing the NOx conversion efficiency item by item; if no hardware component of the engine postprocessor has a fault, the locking fault is caused by the fact that the sulfur content of the fuel oil exceeds the standard. The hardware components of the engine aftertreatment comprise a urea nozzle, a urea pump, a NOx sensor, a urea quality sensor, an exhaust gas recirculation valve, a supercharger and the like. For example, when the deviation rate of the NOx conversion efficiency from the standard value reaches 12%, detecting whether the NOx sensor has a fault, if the NOx sensor has a fault, reporting the NOx fault, and processing according to the NOx troubleshooting flow; if the NOx sensor has no fault, detecting whether the urea quality sensor has a fault, if the urea quality sensor has a fault, reporting the fault of the urea quality sensor, and processing according to a fault removing process of the urea quality sensor; and if the urea quality sensor has no fault, detecting whether the exhaust gas recirculation valve has a fault, and repeating the steps to detect whether each hardware component of the engine after-treatment has a fault, and if each hardware component of the engine after-treatment has no fault, determining the fault caused by using the high-sulfur fuel oil.
Furthermore, after the sulfur content of the fuel exceeds the standard, the locking fault cause also comprises the step of giving an alarm to warn the high-sulfur fault of the fuel.
Since the sulfur regeneration consumes additional fuel and affects the operation of the vehicle, in order to avoid frequent regeneration, the conditions for triggering the sulfur regeneration request in step S4 include: the time interval from the last passage of the sulfur regeneration request is not less than a first set value, the fuel consumption interval from the last passage of the sulfur regeneration request is not less than a second set value, and the conversion efficiency fluctuation interval from the last passage of the sulfur regeneration request is not less than a third set value. Wherein the first set value is 12 hours, the second set value is 600 liters, and the third set value is 8%, and when all of the above conditions are satisfied, a sulfur regeneration request is generated. The first set value, the second set value and the third set value are set according to the collected vehicle use condition after comprehensive evaluation, and are set by considering the torque limit requirements of emission regulations, and are determined by comprehensive tests in combination with the reliability service life of the post-processor, the vehicle oil consumption and the driver driving feeling.
In this embodiment, the step S5 of analyzing and determining whether the sulfur regeneration request has passed through according to the regeneration requirement includes:
step S51, acquiring regeneration accumulation time, regeneration accumulation mileage and regeneration accumulation oil quantity through a regeneration counter;
and S52, when the regeneration accumulated time is greater than a fourth set value, or the regeneration accumulated mileage is greater than a fifth set value, or the regeneration accumulated oil amount is greater than a sixth set value, the problem that frequent regeneration brings bad trouble to normal use of a user and causes the economic degradation of the whole vehicle is avoided through a sulfur regeneration request. When one of the three requirements is met, the desulfurization mode is triggered by coordinating the sulfur regeneration request through the regeneration mode, and the step S6 is entered for desulfurization treatment. Wherein the fourth setting value is 40 hours, the fifth setting value is 3000 kilometers, and the sixth setting value is 1000 liters. The regeneration accumulation time is determined by the daily running time of the vehicle, and the 3-day accumulation time is about 40 hours when the daily running time of the vehicle is 12-13 hours; the regeneration accumulated mileage is determined by the regeneration accumulated time and the average vehicle speed, and when the regeneration accumulated time is 40 hours and the average vehicle speed is 70-75 km/h, the regeneration accumulated mileage is about 3000 km; the regeneration accumulated oil quantity is determined according to the regeneration accumulated mileage and the average oil consumption, and when the regeneration accumulated mileage is 3000 kilometers and the average oil consumption is 30-32 liters/hundred kilometers, the regeneration accumulated oil quantity is about 1000 liters.
Further, before the step S52, the method further includes: and acquiring the carbon accumulation amount, and when the carbon accumulation amount exceeds a set threshold value, clearing the regeneration counter to enter the next counting period through a sulfur regeneration request. When the carbon accumulation amount is large, the pressure difference is too large, and normal work of the engine is influenced, regeneration needs to be preferentially carried out, after regeneration is carried out, the regeneration counter is cleared, and the step S51 is carried out again to avoid repeated regeneration after the condition of the step S52 is achieved.
In this embodiment, in the step S5, after the step of passing the sulfur regeneration request, the step of sending a fault and torque limit warning through a vehicle instrument further includes reminding a driver of filling qualified fuel.
The fuel oil high sulfur identification processing device comprises a processor and a memory which is in communication connection with the processor, wherein the memory stores programs or instructions, and the programs or instructions are executed by the processor so as to enable the processor to execute the steps of the fuel oil high sulfur identification processing method, and the fuel oil high sulfur identification processing device specifically comprises the following steps:
step S1, monitoring engine operation parameters, wherein the engine operation parameters comprise nitrogen oxide conversion efficiency, engine exhaust temperature and urea injection amount;
s2, comparing the monitoring value of the nitrogen oxide conversion efficiency with the standard value of the nitrogen oxide conversion efficiency, and if the deviation ratio of the monitoring value and the standard value reaches a set threshold value, performing S3;
s3, troubleshooting the fault reason that the conversion efficiency of the nitrogen oxide exceeds the standard, and when the locking fault reason is that the sulfur content of the fuel oil exceeds the standard, performing the step S4;
s4, triggering a sulfur regeneration request;
step S5, analyzing the regeneration requirement according to the sulfur regeneration request, judging whether the sulfur regeneration request passes through according to the regeneration requirement analysis, and if the sulfur regeneration request passes through, performing step S6;
and step S6, carrying out desulfurization treatment in a forced regeneration mode.
Wherein the memory comprises at least one type of readable storage medium, the readable storage medium comprises flash memory, a removable hard disk, a card type memory (e.g., SD or DX memory, etc.), a magnetic disk, an optical disk, etc. The memory may in some embodiments be an internal storage unit of the apparatus. The memory may also be an external storage device in other embodiments, such as a plug-in removable hard drive, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like. Further, the memory may also include both an internal storage unit and an external storage device. The memory may be used not only to store installed application software and various types of data such as codes of a control program of the fuel high-sulfur recognition process, etc., but also to temporarily store data that has been output or is to be output.
The processor may in some embodiments be formed by an integrated circuit, for example, a single packaged integrated circuit, or may be formed by a plurality of integrated circuits packaged with the same or different functions, including one or more Central Processing Units (CPUs), microprocessors, and the like. The processor performs various functions and processes data by executing programs stored in the memory and calling data stored in the memory.
It should be noted that other embodiments of the fuel high-sulfur identification processing device of the present invention are the same as the above-mentioned embodiments of the fuel high-sulfur identification processing method, and are not described herein again.
The invention also provides a storage medium, which stores a program or instructions, and the program or instructions are executed by a processor to realize the steps of the fuel oil high-sulfur identification processing method.
It should be noted that other embodiments of the storage medium of the present invention are the same as the embodiments of the above-mentioned fuel high-sulfur identification processing apparatus and method, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A fuel oil high sulfur identification processing method is characterized by comprising the following steps:
step S1, monitoring engine operation parameters, wherein the engine operation parameters comprise nitrogen oxide conversion efficiency, engine exhaust temperature and urea injection amount;
s2, comparing the monitoring value of the nitrogen oxide conversion efficiency with the standard value of the nitrogen oxide conversion efficiency, and if the deviation ratio of the monitoring value and the standard value reaches a set threshold value, performing S3; is that
S3, troubleshooting the fault reason that the conversion efficiency of the nitrogen oxide exceeds the standard, and when the locking fault reason is that the sulfur content of the fuel oil exceeds the standard, performing the step S4;
s4, triggering a sulfur regeneration request;
step S5, analyzing the regeneration requirement according to the sulfur regeneration request, judging whether the sulfur regeneration request passes through according to the regeneration requirement analysis, and if the sulfur regeneration request passes through, performing step S6;
and step S6, carrying out desulfurization treatment in a forced regeneration mode.
2. The fuel oil high sulfur identification processing method according to claim 1, wherein the step S3 includes: and sequentially checking whether each hardware component of the engine postprocessor fails according to a set sequence, wherein if no hardware component of the engine postprocessor fails, the locking failure is caused by the fact that the sulfur content of the fuel oil exceeds the standard.
3. The fuel high sulfur identification processing method according to claim 1, wherein in step S4, the condition for triggering the sulfur regeneration request includes: the time interval from the last passage of the sulfur regeneration request is not less than a first set value, the fuel consumption interval from the last passage of the sulfur regeneration request is not less than a second set value, and the conversion efficiency fluctuation interval from the last passage of the sulfur regeneration request is not less than a third set value.
4. The fuel oil high sulfur identification processing method according to claim 1, wherein the step of analyzing and judging whether the sulfur regeneration request is passed according to the regeneration requirement in step S5 comprises:
step S51, acquiring regeneration accumulation time, regeneration accumulation mileage and regeneration accumulation oil quantity through a regeneration counter;
and S52, when the regeneration accumulation time is larger than a fourth set value, or the regeneration accumulation mileage is larger than a fifth set value, or the regeneration accumulation oil amount is larger than a sixth set value, passing a sulfur regeneration request.
5. The fuel oil high sulfur identification processing method according to claim 4, characterized by further comprising, before step S52: and acquiring the carbon accumulation amount, and when the carbon accumulation amount exceeds a set threshold value, clearing the regeneration counter to enter the next counting period through a sulfur regeneration request.
6. The fuel high sulfur identification processing method according to claim 1, wherein in step S5, after the step of passing the sulfur regeneration request, the method further comprises the step of issuing a fault and torque limit warning through a vehicle instrument.
7. The fuel oil high sulfur identification processing method according to claim 1, characterized by further comprising, before step S1: measuring a change curve chart of each operating parameter of the engine under different fuel consumption rates as a standard comparison curve; and obtaining a standard value of the nitrogen oxide conversion efficiency according to the standard comparison curve.
8. A fuel high-sulfur recognition processing device, comprising a processor and a memory communicatively connected to the processor, wherein the memory stores a program or instructions, and the program or instructions are executed by the processor to enable the processor to execute the steps of the fuel high-sulfur recognition processing method according to any one of claims 1 to 7.
9. A storage medium storing a program or instructions which, when executed by a processor, implement the steps of the fuel high sulfur identification processing method according to any one of claims 1 to 7.
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