CN112302771B - Method, device and equipment for detecting urea consumption abnormity and storage medium - Google Patents
Method, device and equipment for detecting urea consumption abnormity and storage medium Download PDFInfo
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- CN112302771B CN112302771B CN202011229738.7A CN202011229738A CN112302771B CN 112302771 B CN112302771 B CN 112302771B CN 202011229738 A CN202011229738 A CN 202011229738A CN 112302771 B CN112302771 B CN 112302771B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The application discloses a method, a device, equipment and a storage medium for detecting urea consumption abnormity. The method comprises the following steps: counting fuel consumption cumulant of the vehicle in a state of meeting urea injection conditions; when urea filling operation is detected, resetting the fuel consumption cumulant; when the fuel consumption cumulative amount reaches the first threshold value, if the urea filling operation is not detected, it is determined that the urea consumption abnormality occurs. According to the technical scheme, whether the urea consumption is abnormal in the aftertreatment system is determined based on the fuel consumption cumulant and the urea filling operation of the vehicle in the state of meeting the urea injection condition without depending on the urea consumption of the urea nozzle, so that the detection result has higher accuracy.
Description
Technical Field
The application belongs to the technical field of aftertreatment systems of engines, and particularly relates to a method, a device, equipment and a storage medium for detecting urea consumption abnormity.
Background
An aftertreatment system for an engine is used to treat engine exhaust of a vehicle. The aftertreatment system mainly includes a DOC (oxidation catalyst), a DPF (particulate trap), and an SCR (selective catalytic reduction catalyst).
The DOC has the functions of: HC (hydrocarbons), CO (carbon monoxide) and NO (nitrogen monoxide) in the engine exhaust are oxidized. The DPF functions as follows: particulate matter in engine exhaust is trapped with a filter material. The SCR functions as follows: under the action of catalyst, the ammonia gas and nitrogen oxide compound in the engine exhaust gas are subjected to reduction reaction to generate harmless nitrogen and water. The urea solution stored in the urea storage device is sprayed into an exhaust pipe of the engine through a urea nozzle, and the urea solution is subjected to a pyrolysis reaction to generate ammonia.
The urea consumption of the after-treatment system should be adapted to the nitrogen oxide emissions in the engine exhaust. If the consumption of urea is abnormal, the exhaust of the engine passing through the after-treatment system can not meet the tail gas emission requirement regulated by law. Therefore, it is necessary to detect whether an abnormality occurs in the urea consumption amount of the after-treatment system.
At present, the following scheme is adopted for detecting the urea consumption abnormity of the after-treatment system: and determining whether the urea consumption of the after-treatment system is abnormal or not based on the urea consumption accumulated amount of the urea nozzle and the fuel consumption accumulated amount of the vehicle. However, the urea nozzles may have state differences (e.g., crystallization and blockage of the urea nozzles), which may cause a deviation in statistics of urea consumption cumulative amounts of the urea nozzles, and ultimately cause an error in a urea consumption abnormality detection result.
Disclosure of Invention
In view of the above, the present application aims to provide a method, a device and a storage medium for detecting urea consumption abnormality so as to accurately determine whether the urea consumption of an after-treatment system is abnormal.
In order to achieve the above purpose, the present application provides the following technical solutions:
the application provides a method for detecting urea consumption abnormity, which is applied to a vehicle provided with an after-treatment system, and the method comprises the following steps:
counting fuel consumption accumulation of the vehicle under the condition of meeting urea injection conditions;
when urea filling operation is detected, clearing the fuel consumption cumulant;
when the fuel consumption cumulative amount reaches a first threshold, it is determined that an abnormality in urea consumption occurs if no urea filling operation is detected.
Optionally, on the basis of the method, when a urea filling operation is detected, before clearing the accumulated fuel consumption amount, the method further includes:
comparing the accumulated amount of fuel consumption with a second threshold;
and determining that an abnormality in the amount of urea consumption occurs if the cumulative amount of fuel consumption is less than the second threshold.
Optionally, in the method, the counting fuel consumption accumulation amounts of the vehicle in a state where the urea injection condition is satisfied includes:
judging whether a preset enabling condition is met;
when it is determined that the preset enabling condition is satisfied, integrating the fuel consumption rate of the vehicle to obtain the fuel consumption cumulative amount of the vehicle.
Optionally, in the method, the preset enabling condition includes:
the exhaust temperature of an engine of the vehicle is above a preset temperature threshold, the SCR in the aftertreatment system does not need to be thawed or thawed to completion, the engine is in an operating state, and there is no degradation trigger prohibiting urea consumption detection.
The present application also provides a device for detecting urea consumption abnormality, applied to a vehicle provided with an aftertreatment system, the device including:
the statistical unit is used for counting the fuel consumption accumulated amount of the vehicle in a state of meeting the urea injection condition;
a first processing unit configured to zero the fuel consumption accumulation amount when a urea filling operation is detected;
a second processing unit configured to determine that an abnormality in urea consumption occurs if no urea filling operation is detected when the fuel consumption accumulation amount reaches a first threshold.
Optionally, on the basis of the apparatus, the first processing unit is further configured to: when urea filling operation is detected, before the fuel consumption accumulated amount is cleared, the fuel consumption accumulated amount is compared with a second threshold value, and if the fuel consumption accumulated amount is smaller than the second threshold value, the occurrence of urea consumption abnormity is determined.
Optionally, in the apparatus, the statistical unit includes:
the judging subunit is used for judging whether a preset enabling condition is met;
and the integrating unit is used for integrating the fuel consumption rate of the vehicle when the preset enabling condition is determined to be met so as to obtain the fuel consumption accumulated amount of the vehicle.
Optionally, the preset enabling condition includes:
the exhaust temperature of an engine of the vehicle is above a preset temperature threshold, the SCR in the aftertreatment system does not need to be thawed or thawed to completion, the engine is in an operating state, and there is no degradation trigger prohibiting urea consumption detection.
The application also provides equipment for detecting the urea consumption abnormity, which is applied to a vehicle provided with an after-treatment system and comprises a processor and a memory;
the processor is used for executing the program stored in the memory;
the memory is to store a program to at least:
counting fuel consumption accumulation of the vehicle under the condition of meeting urea injection conditions;
when urea filling operation is detected, clearing the fuel consumption cumulant;
when the fuel consumption cumulative amount reaches a first threshold, it is determined that an abnormality in urea consumption occurs if no urea filling operation is detected.
Optionally, the present application further provides a storage medium executable by an electronic device, where the storage medium stores a program, and when the program is loaded and executed by a processor of the electronic device, the electronic device is enabled to implement any one of the above methods for detecting an abnormal urea consumption.
Therefore, the beneficial effects of the application are as follows:
according to the method for detecting the urea consumption abnormity, the fuel consumption cumulant of a vehicle in a state of meeting the urea injection condition is counted, and the counted fuel consumption cumulant is cleared when the urea filling operation is detected every time; in addition, if the counted accumulated amount of fuel consumption reaches the first threshold value but no urea filling operation is detected, it is determined that an abnormality occurs in the urea consumption amount of the aftertreatment system. The method for detecting the urea consumption abnormity does not depend on the urea consumption of the urea nozzle, and determines whether the urea consumption abnormity occurs in the aftertreatment system or not based on the fuel consumption accumulation amount and the urea filling operation of the vehicle in the state of meeting the urea injection condition, so that the detection result has higher accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method of detecting an abnormal urea consumption disclosed herein;
FIG. 2 is a flow chart of another method disclosed herein for detecting an abnormal urea consumption;
FIG. 3 is a schematic diagram of an apparatus for detecting an abnormal urea consumption according to the present disclosure;
fig. 4 is a schematic structural diagram of an apparatus for detecting an abnormal urea consumption disclosed in the present application.
Detailed Description
The application provides a method, a device, equipment and a storage medium for detecting urea consumption abnormity, so as to accurately determine whether the urea consumption of an after-treatment system is abnormal.
In this application, the aftertreatment system of engine includes SCR and urea storage device at least, is provided with the urea nozzle at the pipeline of SCR upper reaches, and the urea nozzle sprays into the pipeline at SCR upper reaches with the urea solution of storage in the urea storage device, and the urea solution takes place the pyrolytic reaction and generates the ammonia, and under the effect of catalyst, the ammonia carries out reduction reaction with the oxynitride in the engine exhaust, generates harmless nitrogen and water. Of course, the aftertreatment system may also include a DOC and DPF disposed upstream of the SCR.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a flow chart of a method for detecting an abnormal urea consumption disclosed in the present application. The main body of the method may be a device for detecting an abnormality in the amount of urea consumption, or may be an in-vehicle device incorporating a device for detecting an abnormality in the amount of urea consumption, and the in-vehicle device may be, for example, an Electronic Control Unit (ECU).
The method comprises the following steps:
s101: and (4) counting the fuel consumption accumulation amount of the vehicle in a state of meeting the urea injection condition.
S102: and when the urea filling operation is detected, clearing the fuel consumption accumulation amount.
S103: when the fuel consumption cumulative amount reaches the first threshold value, if the urea filling operation is not detected, it is determined that the urea consumption abnormality occurs.
The urea filling operation is as follows: urea solution is injected into the urea storage device. In an implementation, the urea solution is injected into the urea storage device when the volume of urea solution in the urea storage device is less than a specified volume threshold (which may be determined by detecting a liquid level within the urea storage device).
The urea consumption of the after-treatment system should be adapted to the nitrogen oxide emission in the engine exhaust, in particular positively correlated. In addition, the amount of nitrogen oxide discharged in the engine exhaust gas is correlated with, and in particular positively correlated with, the fuel consumption of the vehicle. Under normal circumstances, the urea consumption of the aftertreatment system should be positively correlated with the fuel consumption of the vehicle in a state in which the urea injection conditions are satisfied, that is, the urea consumption of the aftertreatment system increases with an increase in the aforementioned fuel consumption and decreases with a decrease in the aforementioned fuel consumption.
Under normal conditions, when the fuel consumption accumulation amount of the vehicle in a state where the urea injection condition is satisfied reaches the first threshold value, the volume of the urea solution in the urea storage device should drop to a specified volume threshold value, and the urea solution is to be injected into the urea storage device (i.e., the urea filling operation is performed). If the urea solution is not injected into the urea storage device (i.e., the urea filling operation is not performed) when the cumulative amount of fuel consumption of the vehicle in the state where the urea injection condition is satisfied reaches the first threshold value, it indicates that: when the engine runs for a long time but the urea solution is not filled into the urea storage device, the urea consumption of the after-treatment system is abnormal, specifically, the urea consumption is excessively low. And calibrating the value of the first threshold value through multiple tests.
Note that, in the present application, the accumulated amount of fuel consumption of the vehicle in the state where the urea injection condition is satisfied is counted, instead of counting the accumulated amount of fuel consumption of the vehicle during the operation of the engine. Here, the explanation is made: the urea nozzle may inject the urea solution into the pipeline only when a certain condition is satisfied after the engine is started, instead of immediately injecting the urea solution into the pipeline after the engine is started. Therefore, the fuel consumption accumulated amount and the urea filling operation of the vehicle in the state where the urea injection condition is satisfied are taken as the basis for judging whether the urea consumption abnormality occurs in the aftertreatment system.
In addition, when the vehicle is powered off (the entire vehicle key is powered off), the fuel consumption accumulated amount of the vehicle in the state where the urea injection condition is satisfied is not cleared, but the fuel consumption accumulated amount of the vehicle in the state where the urea injection condition is satisfied is stored in the nonvolatile memory of the vehicle. And after the vehicle is powered on again, acquiring the fuel consumption accumulated amount from the nonvolatile memory, and when the urea injection condition is met, continuing accumulation on the basis of the fuel consumption accumulated amount.
It should be noted that the fuel consumption of the vehicle is an important index of the vehicle, and it is ensured that the counted fuel consumption is accurate based on various mechanisms, and accordingly, the fuel consumption accumulation amount of the vehicle in the state of meeting the urea injection condition can be accurately counted in the present application. Therefore, the accuracy of the detection result can be improved as compared with the prior art in which it is determined whether the urea consumption amount of the aftertreatment system is abnormal based on the urea consumption accumulated amount of the urea nozzle and the fuel consumption accumulated amount of the vehicle.
According to the method for detecting the urea consumption abnormity, the fuel consumption cumulant of a vehicle in a state of meeting the urea injection condition is counted, and the counted fuel consumption cumulant is cleared when the urea filling operation is detected every time; in addition, if the counted accumulated amount of fuel consumption reaches the first threshold value but no urea filling operation is detected, it is determined that an abnormality occurs in the urea consumption amount of the aftertreatment system. The method for detecting the urea consumption abnormity does not depend on the urea consumption of the urea nozzle, and determines whether the urea consumption abnormity occurs in the aftertreatment system or not based on the fuel consumption accumulation amount and the urea filling operation of the vehicle in the state of meeting the urea injection condition, so that the detection result has higher accuracy.
Referring to fig. 2, fig. 2 is a flow chart of another method of detecting an abnormal urea consumption disclosed herein. The execution subject of the method may be a device that detects an abnormality in urea consumption, or may be an on-vehicle apparatus that integrates a device that detects an abnormality in urea consumption, and the on-vehicle apparatus may be, for example, an electronic control unit.
The method comprises the following steps:
s201: and (4) counting the fuel consumption accumulation amount of the vehicle in a state of meeting the urea injection condition.
S202: when the urea filling operation is detected, the fuel consumption accumulated amount is compared with a second threshold value, and S203 or S204 is executed according to the comparison result. Specifically, if the accumulated amount of fuel consumption is smaller than the second threshold value, S203 is executed, and if the amount of fuel consumption is greater than or equal to the second threshold value, S204 is executed.
S203: it is determined that the urea consumption abnormality occurs, S204 is executed.
S204: and clearing the fuel consumption accumulation amount.
S205: when the fuel consumption cumulative amount reaches the first threshold value, if the urea filling operation is not detected, it is determined that the urea consumption abnormality occurs.
In the foregoing, it has been explained that: under normal circumstances, the urea consumption of the aftertreatment system should be positively correlated with the fuel consumption of the vehicle in a state in which the urea injection conditions are satisfied, that is, the urea consumption of the aftertreatment system increases with an increase in the aforementioned fuel consumption and decreases with a decrease in the aforementioned fuel consumption.
Under normal conditions, when the fuel consumption accumulation amount of the vehicle in a state where the urea injection condition is satisfied reaches the first threshold value, the volume of the urea solution in the urea storage device should drop to a specified volume threshold value, and the urea solution is to be injected into the urea storage device (i.e., the urea filling operation is performed). If the urea solution is not injected into the urea storage device (i.e., the urea filling operation is not performed) when the cumulative amount of fuel consumption of the vehicle in the state where the urea injection condition is satisfied reaches the first threshold value, it indicates that: when the engine runs for a long time but the urea solution is not filled into the urea storage device, the urea consumption of the after-treatment system is abnormal, specifically, the urea consumption is excessively low.
Under normal circumstances, when the urea filling operation is detected, the cumulative amount of fuel consumption at the present time should be greater than or equal to the second threshold value. If the urea filling operation is detected, but the fuel consumption accumulated amount at the current moment is smaller than the second threshold value, the urea consumption of the after-treatment system is abnormal, specifically the urea consumption is over-high.
Optionally, the second threshold is smaller than the first threshold. Of course, the first threshold value and the second threshold value may be set to be equal.
According to the method for detecting the urea consumption abnormity, the fuel consumption accumulation of the vehicle in a state of meeting the urea injection condition is counted, and when the urea filling operation is detected each time, if the fuel consumption accumulation at the current moment is smaller than a second threshold value, the urea consumption of the aftertreatment system is determined to be abnormal (the urea consumption is over-high abnormal), and the counted fuel consumption accumulation is cleared; in addition, if the counted accumulated amount of fuel consumption reaches the first threshold value but no urea filling operation is detected, it is determined that an abnormality occurs in the urea consumption amount of the aftertreatment system (a urea consumption amount excessively low abnormality). The method for detecting the urea consumption abnormity does not depend on the urea consumption of the urea nozzle, and determines whether the urea consumption abnormity is excessively low or excessively high in the aftertreatment system based on the fuel consumption accumulation amount and the urea filling operation of the vehicle in the state of meeting the urea injection condition, so that the detection result has higher accuracy.
In another embodiment of the present application, a description will be given of a scheme for counting the accumulated fuel consumption amount of a vehicle in a state where the urea injection condition is satisfied.
The method for counting the fuel consumption accumulation amount of the vehicle in the state of meeting the urea injection condition comprises the following steps:
a1: and judging whether a preset enabling condition is met.
Wherein the preset enabling conditions at least include urea injection conditions. Of course, the preset enabling conditions may also include other conditions besides urea injection conditions.
A2: when it is determined that the preset enabling condition is satisfied, the fuel consumption rate of the vehicle is integrated to obtain the fuel consumption cumulative amount of the vehicle.
In practice, the fuel consumption rate of the vehicle may be determined based on the total amount of fuel injected, the engine speed, the number of cylinders of the engine, and the fuel density.
In one possible implementation, the preset enabling condition includes: the exhaust temperature of the engine of the vehicle is above a preset temperature threshold and the engine is in an operating state.
The engine is in a running state, namely the rotating speed of the engine reaches a preset rotating speed threshold value. That is, after the engine is started, when the rotation speed reaches a preset rotation speed threshold, the engine is considered to be in the running state.
The above-described case where the exhaust temperature of the engine of the vehicle is higher than the preset temperature threshold value and the engine is in the running state is one of the solutions of the urea injection condition.
In another possible implementation manner, the preset enabling condition includes: the exhaust temperature of the engine of the vehicle is above a preset temperature threshold, the engine is in operation, and the SCR in the aftertreatment system is finished without thawing or thawing.
In low temperature environments, components in the aftertreatment system may freeze, causing the SCR to fail to function properly. For example, in a low-temperature environment, the urea solution in the urea storage device may freeze, and the pipeline connecting the urea storage device, the urea pump and the urea nozzle may freeze, in which case the SCR needs to be defrosted by electric heating or water heating. Therefore, if in a low temperature environment, the urea injection conditions may also include: the SCR in the aftertreatment system does not need to be thawed or otherwise finished.
The above-described exhaust temperature of the vehicle's engine being above a preset temperature threshold, the engine being in operation, and the SCR in the aftertreatment system being finished without thawing or thawing are another option for the urea injection condition.
In another possible implementation manner, the preset enabling condition includes: the exhaust temperature of the engine of the vehicle is above a preset temperature threshold, the engine is in an operating state, the SCR in the aftertreatment system does not need to be thawed or thawed to completion, and there is no degradation trigger prohibiting the detection of urea consumption.
That is, the preset enable condition may include a degradation trigger without prohibiting detection of the amount of urea consumption, in addition to the urea injection condition.
The purpose of setting the degradation trigger prohibiting the detection of the urea consumption is: to prevent erroneous diagnosis of abnormal detection of urea consumption. For example, whether to fill the urea storage device with urea is determined based on a liquid level in the urea storage device, which is detected by a liquid level sensor. If the level sensor fails, the determination of whether to perform a urea filling operation on the urea storage device is inaccurate. The method is used for determining whether the urea consumption is abnormal or not in the aftertreatment system based on the fuel consumption accumulation amount and the urea filling operation of the vehicle in the state that the urea injection condition is met. Therefore, if degradation triggering for forbidding urea consumption detection occurs due to faults of the liquid level sensor or other reasons, the fuel consumption accumulation amount of the vehicle in a state of meeting the urea injection condition is stopped to be counted, so that the detection of urea consumption abnormity of the aftertreatment system is stopped, and an error detection result is avoided.
The application discloses a method for detecting urea consumption abnormity, and correspondingly, the application also discloses a device for detecting urea consumption abnormity. The descriptions of the two in the specification can be mutually referred.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an apparatus for detecting an abnormal urea consumption disclosed in the present application. The device includes:
the statistical unit 301 is used for counting the fuel consumption accumulation amount of the vehicle in the state of satisfying the urea injection condition.
A first processing unit 302 for clearing the accumulated amount of fuel consumption when a urea filling operation is detected.
A second processing unit 303 configured to determine that a urea consumption amount abnormality occurs if a urea filling operation is not detected when the fuel consumption accumulation amount reaches a first threshold.
According to the device for detecting the urea consumption abnormity, the fuel consumption cumulant of a vehicle in a state of meeting the urea injection condition is counted, and the counted fuel consumption cumulant is cleared when the urea filling operation is detected every time; in addition, if the counted accumulated amount of fuel consumption reaches the first threshold value but no urea filling operation is detected, it is determined that an abnormality occurs in the urea consumption amount of the aftertreatment system. The device for detecting the urea consumption abnormity does not depend on the urea consumption of the urea nozzle, and determines whether the urea consumption abnormity occurs in the aftertreatment system or not based on the fuel consumption accumulation amount and the urea filling operation of the vehicle in the state of meeting the urea injection condition, so that the detection result has higher accuracy.
Optionally, the first processing unit 302 is further configured to: when the urea filling operation is detected, before the fuel consumption cumulative amount is cleared, the fuel consumption cumulative amount is compared with a second threshold value, and if the fuel consumption cumulative amount is smaller than the second threshold value, it is determined that the urea consumption amount is abnormal.
The device for detecting the urea consumption abnormality disclosed by the application does not depend on the urea consumption of the urea nozzle, and determines whether the after-treatment system has the urea consumption too-low abnormality and the urea consumption too-high abnormality based on the fuel consumption accumulation amount and the urea filling operation of the vehicle in the state of meeting the urea injection condition, so that the detection result has higher accuracy.
Optionally, the statistical unit 301 includes:
the judging subunit is used for judging whether a preset enabling condition is met;
and the integrating unit is used for integrating the fuel consumption rate of the vehicle when the preset enabling condition is determined to be met so as to obtain the fuel consumption accumulated amount of the vehicle.
In one possible implementation, the preset enabling condition includes: the exhaust temperature of the engine of the vehicle is above a preset temperature threshold and the engine is in an operating state.
In another possible implementation manner, the preset enabling condition includes: the exhaust temperature of the engine of the vehicle is above a preset temperature threshold, the engine is in operation, and the SCR in the aftertreatment system is finished without thawing or thawing.
In another possible implementation manner, the preset enabling condition includes: the exhaust temperature of the engine of the vehicle is above a preset temperature threshold, the engine is in an operating state, the SCR in the aftertreatment system does not need to be thawed or thawed to completion, and there is no degradation trigger prohibiting the detection of urea consumption.
Another embodiment of the present application provides an apparatus for detecting an abnormality in urea consumption to implement the method for detecting an abnormality in urea consumption provided above in the present application.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an apparatus for detecting an abnormal urea consumption disclosed in the present application. The device may include a processor 401 and a memory 402.
Optionally, the server may further include: a communication interface 403 and a communication bus 404. The processor 401, the memory 402 and the communication interface 403 all communicate with each other through the communication bus 404.
In the embodiment of the present application, the processor 401 may be a Central Processing Unit (CPU), an application specific integrated circuit, a digital signal processor, an off-the-shelf programmable gate array or other programmable logic device, etc.
The processor 401 may call a program stored in the memory 402.
The memory 402 is used to store one or more programs, which may include program code including computer operating instructions. In the embodiment of the present application, a program for implementing any one of the above-described methods for detecting an abnormality in urea consumption is stored in the memory.
In one possible implementation, the memory 402 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, the above-mentioned programs, and the like; the storage data area may store data created according to the use of the device, and the like.
Further, the memory 402 may include high speed random access memory and may also include non-volatile memory.
The communication interface 403 may be an interface of a communication module.
Of course, the structure of the device shown in fig. 4 is not limited to the device in the embodiments of the present application, and in practical applications, the device may include more or less components than those shown in fig. 4, or some components may be combined.
Another embodiment of the present application provides a storage medium executable by an electronic device, where the storage medium stores a program, and when the program is loaded and executed by a processor of the electronic device, the program causes the electronic device to implement any one of the methods disclosed above in the present application.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device, the equipment and the storage medium disclosed by the embodiment correspond to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of detecting an abnormality in urea consumption, applied to a vehicle provided with an aftertreatment system, characterized by comprising:
counting fuel consumption accumulation of the vehicle under the condition of meeting urea injection conditions;
when urea filling operation is detected, clearing the fuel consumption cumulant;
when the fuel consumption accumulation amount reaches a first threshold value, if urea filling operation is not detected, determining that urea consumption abnormality occurs; the first threshold is fuel consumption accumulation corresponding to the situation that the volume of the urea solution in the urea storage device is reduced to a specified volume threshold and urea filling operation needs to be executed.
2. The method according to claim 1, wherein when a urea filling operation is detected, before clearing the cumulative amount of fuel consumption, further comprising:
comparing the accumulated amount of fuel consumption with a second threshold;
determining that an abnormality in urea consumption occurs if the accumulated amount of fuel consumption is smaller than the second threshold; the second threshold is the volume of the urea solution in the urea storage device is reduced to a designated volume threshold, and the corresponding fuel consumption accumulation amount is detected when the urea filling operation is detected, and the second threshold is smaller than or equal to the first threshold.
3. The method according to claim 1 or 2, wherein the counting the fuel consumption accumulation amount of the vehicle in the state where the urea injection condition is satisfied includes:
judging whether a preset enabling condition is met;
when it is determined that the preset enabling condition is satisfied, integrating the fuel consumption rate of the vehicle to obtain the fuel consumption cumulative amount of the vehicle.
4. The method of claim 3, wherein the preset enabling conditions comprise:
the exhaust temperature of an engine of the vehicle is above a preset temperature threshold, the SCR in the aftertreatment system does not need to be thawed or thawed to completion, the engine is in an operating state, and there is no degradation trigger prohibiting urea consumption detection.
5. An apparatus for detecting an abnormality in urea consumption, applied to a vehicle provided with an aftertreatment system, characterized by comprising:
the statistical unit is used for counting the fuel consumption accumulated amount of the vehicle in a state of meeting the urea injection condition;
a first processing unit configured to zero the fuel consumption accumulation amount when a urea filling operation is detected;
a second processing unit configured to determine that an abnormality in urea consumption occurs if no urea filling operation is detected when the fuel consumption accumulation amount reaches a first threshold; the first threshold is fuel consumption accumulation corresponding to the situation that the volume of the urea solution in the urea storage device is reduced to a specified volume threshold and urea filling operation needs to be executed.
6. The apparatus of claim 5, wherein the first processing unit is further configured to: when urea filling operation is detected, before the fuel consumption accumulated amount is cleared, the fuel consumption accumulated amount is compared with a second threshold value, and if the fuel consumption accumulated amount is smaller than the second threshold value, the urea consumption amount is determined to be abnormal; the second threshold is the volume of the urea solution in the urea storage device is reduced to a designated volume threshold, and the corresponding fuel consumption accumulation amount is detected when the urea filling operation is detected, and the second threshold is smaller than or equal to the first threshold.
7. The apparatus according to claim 5 or 6, wherein the statistical unit comprises:
the judging subunit is used for judging whether a preset enabling condition is met;
and the integrating unit is used for integrating the fuel consumption rate of the vehicle when the preset enabling condition is determined to be met so as to obtain the fuel consumption accumulated amount of the vehicle.
8. The apparatus of claim 7, wherein the preset enabling conditions comprise:
the exhaust temperature of an engine of the vehicle is above a preset temperature threshold, the SCR in the aftertreatment system does not need to be thawed or thawed to completion, the engine is in an operating state, and there is no degradation trigger prohibiting urea consumption detection.
9. An apparatus for detecting an abnormality in urea consumption, applied to a vehicle provided with an aftertreatment system, characterized in that the apparatus comprises a processor and a memory;
the processor is used for executing the program stored in the memory;
the memory is to store a program to at least:
counting fuel consumption accumulation of the vehicle under the condition of meeting urea injection conditions;
when urea filling operation is detected, clearing the fuel consumption cumulant;
when the fuel consumption accumulation amount reaches a first threshold value, if urea filling operation is not detected, determining that urea consumption abnormality occurs; the first threshold is fuel consumption accumulation corresponding to the situation that the volume of the urea solution in the urea storage device is reduced to a specified volume threshold and urea filling operation needs to be executed.
10. A storage medium executable by an electronic device, wherein the storage medium stores a program which, when loaded and executed by a processor of the electronic device, causes the electronic device to carry out the method of any one of claims 1 to 4.
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| CN116816482B (en) * | 2023-08-31 | 2023-12-15 | 潍柴动力股份有限公司 | Correction method and device for urea injection quantity, electronic equipment and storage medium |
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| JP4687709B2 (en) * | 2007-04-25 | 2011-05-25 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| JP4710868B2 (en) * | 2007-04-25 | 2011-06-29 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| JP4840703B2 (en) * | 2007-11-16 | 2011-12-21 | トヨタ自動車株式会社 | Abnormality diagnosis device for exhaust purification system |
| JP4458182B2 (en) * | 2008-04-25 | 2010-04-28 | トヨタ自動車株式会社 | Diagnostic device for reducing agent supply device |
| CN103748325B (en) * | 2011-04-05 | 2017-03-15 | 卡明斯散发控制技术公司 | For the system of after-treatment system monitoring, method and apparatus |
| DE102012209240A1 (en) * | 2012-05-31 | 2013-12-05 | Robert Bosch Gmbh | Method for checking the plausibility of a measuring device for determining a quality of a urea water solution in a container of an SCR catalyst system |
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| JP6127510B2 (en) * | 2012-12-28 | 2017-05-17 | いすゞ自動車株式会社 | Urea water consumption diagnostic device for urea SCR |
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