CN114495447B - Alarm method and device for abnormal concentration of urea solution of engine - Google Patents
Alarm method and device for abnormal concentration of urea solution of engine Download PDFInfo
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- CN114495447B CN114495447B CN202210048857.5A CN202210048857A CN114495447B CN 114495447 B CN114495447 B CN 114495447B CN 202210048857 A CN202210048857 A CN 202210048857A CN 114495447 B CN114495447 B CN 114495447B
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 269
- 239000004202 carbamide Substances 0.000 title claims abstract description 269
- 238000000034 method Methods 0.000 title claims abstract description 75
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 17
- 238000012545 processing Methods 0.000 claims description 25
- 238000004590 computer program Methods 0.000 claims description 10
- 239000000243 solution Substances 0.000 description 207
- 230000008569 process Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 13
- 230000005856 abnormality Effects 0.000 description 11
- 238000007689 inspection Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000004422 calculation algorithm Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000003062 neural network model Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
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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
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Abstract
The application discloses an alarm method and device for abnormal concentration of an engine urea solution, which are used for determining whether to alarm or not by combining the running state of a vehicle and the concentration value of the urea solution in a period of time, and solving the problem of false alarm in the prior art. The method comprises the following steps: acquiring a urea solution concentration value in a current period and a vehicle speed at the end time of the current period; when the vehicle speed is greater than zero, determining whether to alarm according to a comparison result of the urea solution concentration value in the current period and a preset alarm limit value; when the vehicle speed is equal to zero, whether to alarm is determined according to whether the vehicle speed is in an alarm state before the vehicle speed is equal to zero and the comparison result.
Description
Technical Field
The application relates to the technical field of engine control, in particular to an alarm method and device for abnormal concentration of urea solution of an engine.
Background
The urea solution in the urea tank is used to treat nitrogen oxides in the emissions, which may lead to emissions that are not up to standard if urea is not used or the urea solution is not sufficiently concentrated, causing the nitrogen oxygen sensor to alarm. Therefore, it is very important to ensure that the concentration of urea solution in the urea tank reaches the standard. At present, an ultrasonic urea quality sensor is adopted to detect the concentration of the urea solution in a urea box, a preset alarm limit value is combined to determine whether the concentration of the urea solution meets the standard, and if the concentration of the urea solution does not meet the standard, abnormal alarm of the concentration of the urea solution is carried out.
In the method, if the sensor probe has bubbles attached or bubbles exist in the urea solution, the concentration of the urea solution measured by the sensor can be reduced and possibly lower than a preset alarm limit value, so that a false alarm condition occurs. In addition, when the number of bubbles is relatively large, the sensor may not detect the urea solution, indication information indicating that the current urea solution concentration cannot be detected may be sent to the engine control unit (Electronic Control Unit, ECU), and when the ECU receives the indication information, a calibration value may be adopted as the current urea solution concentration value, and the calibration value may be greatly different from the current actual urea solution concentration value, thereby causing a problem of large measurement error.
Disclosure of Invention
The embodiment of the application provides an alarm method and device for abnormal concentration of an engine urea solution, which are used for determining whether to alarm or not according to the running state of a vehicle and the concentration value of the urea solution in a period of time, and solving the problem of false alarm in the prior art.
In a first aspect, an embodiment of the present application provides an alarm method for abnormal concentration of an engine urea solution, including:
Acquiring a urea solution concentration value in a current period and a vehicle speed at the end time of the current period;
when the vehicle speed is greater than zero, determining whether to alarm according to a comparison result of the urea solution concentration value in the current period and a preset alarm limit value;
and when the vehicle speed is equal to zero, determining whether to alarm according to whether the vehicle speed is in an alarm state before being equal to zero and the comparison result. Based on the above scheme, two factors are generated in the urea solution, namely, the generation of bubbles is caused by shaking in the running process of the vehicle, and the generation of bubbles is caused by injecting new urea solution when the vehicle is stopped. From the above, it can be seen that, the solution concentration value of urea in the current period is adopted to judge whether to alarm or not, instead of the value obtained by real-time measurement of the ultrasonic urea quality sensor being used as the basis for judging the alarm, according to the two situations, aiming at the situation that the vehicle normally runs, namely, the vehicle speed is greater than zero. For the situation that the vehicle is parked, namely the vehicle speed is equal to zero, whether the alarm is given or not is determined by combining whether the alarm is given or not before the vehicle is parked and the concentration value in a period. The method solves the problem of false alarm caused by adopting a concentration value measured in real time, and also solves the problem that the concentration of urea solution at a certain moment is not measurable due to excessive bubbles.
In some embodiments, the method further comprises:
and acquiring the urea solution concentration value at the ending time of the current period, and determining that the urea solution concentration value at the ending time of the current period is smaller than the alarm limit value.
In some embodiments, the method further comprises:
acquiring a urea solution concentration value at the end time of the current period;
if the concentration value of the urea solution at the ending time of the current period is a set value, determining whether to alarm according to the comparison result;
wherein the set value is used for indicating that the concentration of the urea solution is not measurable.
In the prior art, when the probe of the ultrasonic urea quality sensor is attached with a large amount of bubbles, indication information for indicating the current non-urea environment may be returned to the ECU, and when the ECU receives the indication information, the ECU outputs a pre-calibrated value, which may deviate from the current actual urea solution concentration value. If the CDmin spot check test of the environmental protection department is performed at this time, spot check is failed due to the fact that the output value does not accord with the actual value. Based on the scheme, the ECU can adopt the concentration value of the urea solution in the current period of time as the output value, so that the deviation between the output value and the current actual concentration value of the urea solution is reduced, and the problem of unqualified sampling inspection is avoided.
In some embodiments, determining whether to alarm according to the comparison result of the urea solution concentration value in the current period and the preset alarm limit value specifically includes:
if the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming is carried out;
and if the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm.
In some embodiments, determining whether to alarm according to whether the vehicle speed is in an alarm state before being equal to zero and the comparison result specifically includes:
if the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming;
if the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm;
and if the vehicle speed is not in an alarm state before being equal to zero, not giving an alarm.
In some embodiments, prior to obtaining the urea solution concentration value for the current period and the vehicle speed at the end of the current period, the method further comprises:
it is determined that the engine is in an operating state.
In a second aspect, an embodiment of the present application provides an alarm device for abnormality in concentration of urea solution in an engine, including:
the acquisition unit is used for acquiring the concentration value of the urea solution in the current period and the vehicle speed at the end time of the current period;
a processing unit configured to perform:
when the vehicle speed is greater than zero, determining whether to alarm according to a comparison result of the urea solution concentration value in the current period and a preset alarm limit value;
and when the vehicle speed is equal to zero, determining whether to alarm according to whether the vehicle speed is in an alarm state before being equal to zero and the comparison result.
In some embodiments, the obtaining unit is further configured to obtain a urea solution concentration value at an end time of the current period;
the processing unit is further used for determining that the urea solution concentration value at the end time of the current period is smaller than the alarm limit value.
In some embodiments, the obtaining unit is further configured to obtain a urea solution concentration value at an end time of the current period;
the processing unit is further used for determining whether to alarm according to the comparison result when the concentration value of the urea solution at the end time of the current period is a set value;
Wherein the set value is used for indicating that the concentration of the urea solution is not measurable.
In some embodiments, the processing unit is specifically configured to:
when the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming;
and when the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm.
In some embodiments, the processing unit is specifically configured to:
alarming when the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is smaller than the alarm limit value;
when the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm;
and when the vehicle speed is not in an alarm state before being equal to zero, not giving an alarm.
In some embodiments, the processing unit is further configured to:
it is determined that the engine is in an operating state.
In a third aspect, embodiments of the present application provide an electronic device that includes a controller and a memory. The memory is used for storing computer-executable instructions, and the controller executes the computer-executable instructions in the memory to perform the operational steps of any one of the possible implementations of the method of the first aspect using hardware resources in the controller.
In a fourth aspect, the present application provides a computer readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the methods of the above aspects.
In addition, the advantages of the second aspect to the fourth aspect may be referred to as the advantages of the first aspect, and will not be described here.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application.
FIG. 1 is a flow chart of an alarm method for engine urea solution concentration abnormality provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a sliding window according to an embodiment of the present application;
FIG. 3 is a flowchart of a method for determining a vehicle running state according to an embodiment of the present disclosure;
FIG. 4 is a flowchart of an alarm method for abnormality of concentration of urea solution in an engine in a normal running state of a vehicle according to an embodiment of the present application;
FIG. 5 is a flowchart of another method for alarming abnormality in concentration of engine urea solution in a normal running state of a vehicle according to an embodiment of the present application;
FIG. 6 is a flow chart of an alarm method for abnormality of concentration of urea solution in an engine when the vehicle is not powered up again and is not running in accordance with the embodiment of the present application;
FIG. 7 is a flow chart of an alarm method for abnormality in concentration of urea solution in an engine in a state where the vehicle is powered up again and not running, according to an embodiment of the present application;
FIG. 8 is a flowchart of another method for warning of abnormal concentration of engine urea solution in a vehicle re-powered and non-driving condition according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of an electronic control unit of an engine according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of an alarm device for abnormal concentration of urea solution in an engine according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions 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 apparent that the described embodiments are some embodiments of the technical solutions of the present application, but not all embodiments. All other embodiments, which can be made by a person of ordinary skill in the art without any inventive effort, based on the embodiments described in the present application are intended to be within the scope of the technical solutions of the present application.
The terms first and second in the description and claims of the present application and in the above-described figures are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the term "include" and any variations thereof is intended to cover non-exclusive protection. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The term "plurality" in the present application may mean at least two, for example, two, three or more, and embodiments of the present application are not limited.
In addition, the term "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. The character "/" herein generally indicates that the associated object is an "or" relationship unless otherwise specified.
In order to facilitate understanding of the alarm method for concentration abnormality of urea solution provided in the embodiment of the present application, first, technical terms related to the present application are described:
(1) Urea solution: the solution is prepared from high-purity urea and pure water in a certain proportion and is used for treating nitrogen oxides in vehicle emissions so as to reduce environmental pollution.
(2) Urea tank: a tank for storing urea solution.
(3) Ultrasonic urea quality sensor: including an acoustic transmitter, an acoustic receiver, and a mirror that reflects the acoustic wave. In practical application, the sound wave emitter, the sound wave receiver and the reflecting mirror are immersed in the urea aqueous solution, sound waves sent by the sound wave emitter are transmitted to the reflecting mirror in the urea aqueous solution, the reflecting mirror reflects the sound waves, the returned sound waves are received by the sound wave receiver after being reversely transmitted in the urea aqueous solution, and the concentration of the urea aqueous solution can be detected due to different transmission speeds of the sound waves in the urea aqueous solution with different concentrations.
(4) Sliding window algorithm: and taking an array with the set window size for data calculation.
The shaking and jolting of the vehicle during running may cause the urea solution in the urea tank to shake to generate bubbles, or may also generate bubbles due to injection of the urea solution when the urea solution is added to the urea tank. When bubbles exist in the urea solution, the concentration value of the urea solution measured by the ultrasonic urea quality sensor is lower than a true value, and possibly lower than a preset alarm limit value, so that the problem of false alarm is caused. In the related art, in order to solve the problem of such false alarm, it is proposed that in the case that the measured concentration value of the urea solution does not reach the standard, the alarm is not performed first, but the standard concentration value obtained last time before that is adopted as the concentration value of the urea solution currently output.
In the above scheme, the concentration value which is obtained before reaching the standard is adopted as the output value, and the output value may deviate from the actual concentration value of the current urea solution. Especially when CDmin spot inspection is performed without environmental protection, the problem of spot inspection disqualification can be caused. In view of this, the embodiment of the application provides an alarm method and device for abnormality of concentration of urea solution in an engine, which combine a running state of a vehicle and a concentration value of urea solution in a period before a current moment to determine whether to alarm or not. On the premise of solving false alarm, the qualification of the spot check is ensured.
Alternatively, the warning scheme presented herein may be executed by an Engine Control Unit (ECU). In order to facilitate understanding of the solution proposed in the present application, referring to fig. 1, a flowchart of an alarm method for abnormal concentration of an engine urea solution provided in an embodiment of the present application specifically includes:
101, acquiring a urea solution concentration value in a current period and a vehicle speed at the end time of the current period.
Alternatively, the current period may be understood as a period of time preceding and including the current time. For example, the current time is 10:00, and the current period may be 9:50-10:00, and the end time of the current period is the current time, that is, 10:00.
Alternatively, a plurality of urea solution concentration values may be collected during the current period, for example, urea solution concentration values may be collected once every set period (e.g., 1 second). The urea solution concentration value for the current period may be an average of a plurality of urea solution concentration values collected during the current period. Alternatively, the square sum root number of the plurality of urea values collected in the current period may be used as the urea solution concentration value in the current period. That is, the urea solution concentration in the current period is used to characterize the urea solution concentration in one period, and the method for calculating the urea solution concentration in the current period according to the plurality of urea solution concentration values collected in the current period is not particularly limited.
102, when the vehicle speed is greater than zero, determining whether to alarm according to the comparison result of the urea solution concentration value in the current period and the preset alarm limit value.
Optionally, when the vehicle speed at the current moment is greater than zero, the urea solution concentration value at the current period can be compared with a preset alarm limit value, and if the urea solution concentration value at the current period is greater than or equal to the alarm limit value, no alarm is given. And if the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming.
103, when the vehicle speed is equal to zero, determining whether to alarm according to whether the vehicle speed is in an alarm state before being equal to zero and the comparison result.
The comparison result is the comparison result of the urea solution concentration value in the current period and the preset alarm limit value, which is introduced in the step 102.
Optionally, when the vehicle speed at the current time is equal to zero, if it is determined that the vehicle speed is not in the alarm state before the vehicle speed is equal to zero (i.e., the last time the vehicle speed is greater than zero from the current time, which can be understood as the last time before stopping), the alarm may not be performed. If it is determined that the vehicle speed is in the alarm state before being equal to zero, the decision logic in step 102 may be employed to determine whether to continue to maintain the alarm state. That is, if the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, the alarm state is kept continuously, and if the concentration value of the urea solution in the current period is less than the alarm limit value, the alarm is not performed any more, namely the alarm is reset.
Optionally, after determining that the vehicle speed is equal to zero, it may also be determined that the current rotational speed of the engine is greater than zero, i.e., the vehicle is not powered down and is in a stopped state.
Based on the above scheme, two factors are generated in the urea solution, namely, the generation of bubbles is caused by shaking in the running process of the vehicle, and the generation of bubbles is caused by injecting new urea solution when the vehicle is stopped. From the above, it can be seen that, the solution concentration value of urea in the current period is adopted to judge whether to alarm or not, instead of the value obtained by real-time measurement of the ultrasonic urea quality sensor being used as the basis for judging the alarm, according to the two situations, aiming at the situation that the vehicle normally runs, namely, the vehicle speed is greater than zero. For the situation that the vehicle is parked, namely the vehicle speed is equal to zero, whether the alarm is given or not is determined by combining whether the alarm is given or not before the vehicle is parked and the concentration value in a period. The method solves the problem of false alarm caused by adopting a concentration value measured in real time, and also solves the problem that the concentration of urea solution at a certain moment is not measurable due to excessive bubbles.
In some embodiments, before determining whether to alarm using the logic of fig. 1, it may also be possible to first obtain the urea concentration value at the end of the current period, and determine that the urea concentration value at the end of the current period is less than the alarm limit. In some embodiments, the urea solution concentration value of the current period may be used only to determine whether to alarm, whether the actual output value of the ECU is a real-time value of the urea solution concentration measured by the ultrasonic urea quality sensor at the end of the current period. Therefore, the output concentration value can be ensured to be accurate, and the problem that the spot inspection is unqualified when CDmin spot inspection is performed is avoided.
In one possible case, the urea solution concentration value at the end of the current cycle, acquired by the ultrasonic urea quality sensor, is a set value, which is used to indicate that the environment is currently non-urea solution, and the urea solution concentration is not measurable. It may be determined whether or not to alarm based on the urea solution concentration value of the current cycle, and in this case, the ECU may take the urea solution concentration value of the current cycle as an actual output value. In the prior art, when the probe of the ultrasonic urea quality sensor is attached with a large amount of bubbles, indication information for indicating the current non-urea environment may be returned to the ECU, and when the ECU receives the indication information, the ECU outputs a pre-calibrated value, which may deviate from the current actual urea solution concentration value. If the CDmin spot check test of the environmental protection department is performed at this time, spot check is failed due to the fact that the output value does not accord with the actual value. Based on the scheme, the ECU can adopt the concentration value of the urea solution in the current period of time as the output value, so that the deviation between the output value and the current actual concentration value of the urea solution is reduced, and the problem of unqualified sampling inspection is avoided.
As an alternative, the embodiments of the present application propose that a sliding window algorithm can be used to calculate the urea solution concentration value for the current period. The process of calculating the urea solution concentration value of the current period using the sliding window algorithm is described below in connection with specific embodiments. Alternatively, the sliding window may be divided into a large computing window and a small window, and the large computing window may include a plurality of small windows. The ECU may use a preset frequency to collect an average value of the urea solution concentration. The small window can calculate the concentration value of the urea solution with the set quantity collected in the time range of the small window, for exampleAn average value of the set number of urea solution concentration values may be calculated, for example. If the concentration of the urea solution is not measurable or the vehicle is powered down, the number of urea solution concentration values acquired in the time range of the small window does not reach the set number, and calculation of the acquired urea solution concentration values can be omitted. The large window may calculate an average of a plurality of urea solution concentration values respectively derived from a plurality of small windows included therein. If the urea solution concentration is not measurable or the vehicle is powered down, resulting in that the number of small windows included in the large window does not reach the set value, the large window may calculate the average value of the urea solution concentration values of the small windows that have been obtained currently. For example, if the large window normally includes r small windows, the large window may calculate an average value of r urea solution concentration values obtained by the r small windows, respectively. If in some cases the large window includes u small windows (u <r), the large window can calculate the average value of the u urea solution concentration values obtained by the u small windows respectively. The urea solution concentration value of the small window can be an average value of a plurality of urea solution concentration values collected according to a set frequency in the time range of the small window. As an example, reference may be made to fig. 2, which is a schematic diagram of a sliding window provided in an embodiment of the present application. Referring to FIG. 2, X is used a To represent measured urea solution concentration values, n urea solution concentration values are calculated for each small window, each large window comprising r small windows.
In some cases, if the ultrasonic urea quality sensor detects that the current urea solution concentration is not measurable, some set invalid value is returned to the ECU. The ECU may filter out invalid values when calculating using a sliding window algorithm and continue sliding the window after normal measurements are received. The ECU may take the urea solution concentration value calculated in the large window including the current time as the urea solution concentration value of the current cycle.
After calculating the urea solution concentration value in the current period, in the alarm method for the abnormality of the urea solution concentration of the engine provided by the embodiment of the application, the running condition of the vehicle is combined to judge whether to alarm or not. Alternatively, the vehicle running condition may be classified into two cases of vehicle running (vehicle speed greater than zero) and vehicle stopping (vehicle speed equal to zero). Further, the vehicle running conditions may be classified in more detail, for example, as follows: the vehicle is in a normal running state, in a vehicle re-electrified and non-running state (i.e. after the vehicle is powered down, the engine is restarted, but the vehicle is not running), and in a vehicle non-electrified and non-running state (i.e. the vehicle is not powered down all the time and is not running, such as the case of waiting for a traffic light). Optionally, the vehicle running state may be further subdivided, which is not described in detail herein, and the vehicle running state includes only three vehicle states, i.e. a normal running state of the vehicle, a re-powered and non-running state of the vehicle, and a non-powered and non-running state of the vehicle. First, a process of determining a vehicle running state will be described, for example, referring to fig. 3, which is a flowchart of a method for determining a vehicle running state according to an embodiment of the present application, optionally, the method for determining a vehicle running state may be executed by an ECU, where the method specifically includes:
301, the current vehicle speed is acquired.
302, it is determined whether the vehicle speed is greater than zero and continues for a first set period of time.
And judging whether the state that the vehicle speed is greater than zero maintains a first set time length, namely whether the vehicle speed is greater than zero in the first set time length before the current moment.
If yes, proceed to step 303.
If not, then step 304 is continued.
303, determining that the vehicle running state is a normal running state.
304, determining whether the vehicle is powered up again after the first time and before the current time.
The first time is the time when the acquired vehicle speed closest to the current time is greater than zero, and can be understood as the last moment before the vehicle stops.
Alternatively, it may be determined whether there is a case where the engine speed is zero after the first time and before the current time.
If yes, proceed to step 305.
If not, then step 306 is continued.
305, determining the vehicle running state as the vehicle re-power-up and non-running state.
306, determining whether the vehicle speed is equal to zero for a second set period of time.
If yes, proceed to step 307.
If not, return to step 303.
307, determining that the vehicle running state is a non-powered-up and non-running state.
The process of determining the running state of the vehicle is described above in connection with the specific embodiment. The following will proceed with determining whether to alarm or not in combination with the vehicle running state and the urea solution concentration value of the current cycle. Alternatively, different alarm mechanisms may be provided for different vehicle operating conditions. The following description is made in connection with specific scenarios.
Scene one: and the vehicle is in a normal running state.
In one possible case, the ECU may further determine that the urea solution concentration value measured by the current ultrasonic urea quality sensor is less than a preset alarm limit value after determining that the vehicle is running normally, and take the measured urea solution concentration value at the current time as the output value. Further, the ECU can determine whether to alarm according to the comparison result of the urea solution concentration value in the current period and the alarm limit value. The current time is the end time of the current period. In the first scenario, a method for alarming abnormality in concentration of urea solution is described below in combination with a specific embodiment when the concentration value of urea solution at the current time is less than a preset alarm limit value. Optionally, referring to fig. 4, a flowchart of an alarm method for abnormal concentration of urea solution in a normal running state of a vehicle according to an embodiment of the present application specifically includes:
401, determining that the running state of the vehicle at the current moment is the normal running state of the vehicle.
The specific determination process may be referred to the related description in fig. 3, and will not be described herein.
402, determining that the measured urea solution concentration value at the current time is less than the alarm limit.
Alternatively, the ECU may determine whether it is less than the alarm limit based on the urea solution concentration value at the current time measured by the ultrasonic urea quality sensor.
403, after the set time length is reached, determining whether to alarm according to the comparison result of the urea solution concentration value and the alarm limit value in the current period.
Wherein the current time is the end time of the current period.
Specifically, the ECU may determine whether to alarm according to the comparison result when the set period of time is reached after determining that the urea solution concentration value measured at the current time is less than the alarm limit value. The step 102 in fig. 1 may be referred to for determining whether to perform the alarm process according to the comparison result, which is not described herein.
In other possible cases, the ultrasonic urea quality sensor considers the current urea solution concentration to be undetectable due to too many bubbles in the urea solution or too many bubbles attached to the probe of the ultrasonic urea quality sensor. In this case, the present application proposes to use the urea solution concentration value in one period before the urea solution concentration is not measurable as an output value, and to determine whether to alarm according to whether the urea solution concentration is in an alarm state before it is not measurable. Specifically, referring to fig. 5, in a first scenario set forth in the embodiment of the present application, in a case where the concentration of the urea solution is not measurable, a flow chart of an alarm method for abnormality of the concentration of the urea solution specifically includes:
501, determining that the running state of the vehicle at the current moment is the normal running state of the vehicle.
The specific determination process may be referred to the related description in fig. 3, and will not be described herein.
502, it is determined that the current urea solution concentration is not measurable.
Specifically, the ECU may determine that the current urea solution concentration is not measurable based on invalid data returned by the ultrasonic urea quality sensor.
503, determining whether an alarm condition exists before the concentration of urea solution is not measurable.
Alternatively, it may be determined whether the time before the ultrasonic urea quality sensor returns the invalid data is in an alarm state.
If so, then step 504 is continued.
If not, then step 505 is continued.
And 504, determining whether to alarm according to the comparison result of the urea solution concentration value and the alarm limit value in the current period.
Optionally, reference may be made to the determination procedure of step 102 in fig. 1, which is not described herein.
505, continue to remain in the alarm-free state.
Scene II: the vehicle is not powered up again and is not running.
In some possible cases, the ECU may further determine that the urea solution concentration value measured by the current ultrasonic urea quality sensor is less than a preset alarm limit value after determining that the vehicle is in a non-powered-on and non-running state, and take the measured urea solution concentration value at the current time as an output value. Further, the ECU can determine whether an alarm is required together according to whether the vehicle is in an alarm state before being in a state of not being powered on again and not running, and a comparison result of the urea solution concentration value in the current period and the alarm limit. Specifically, referring to fig. 6, a flowchart of an alarm method for abnormal concentration of urea solution in a state that a vehicle is not powered up again and is not running is provided in an embodiment of the present application, and specifically includes:
601, determining that the running state of the vehicle at the current moment is a state that the vehicle is not powered up again and is not running.
The specific determination process may be referred to the related description in fig. 3, and will not be described herein.
602, determining that the measured urea solution concentration value at the current moment is smaller than an alarm limit value.
603, determining whether the vehicle is in an alarm state before the vehicle is not powered up again and is not running.
If yes, proceed to step 604.
If not, step 605 is continued.
And 604, determining whether to alarm according to the comparison result of the urea solution concentration value and the alarm limit value in the current period.
Specifically, when the vehicle is in an alarm state before being in a state of not powering on again and not running, if the concentration value of the urea solution in the current period is smaller than the alarm limit value, continuing to alarm. And stopping alarming until the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, namely resetting the alarm.
605, continue to remain in the alarm-free state.
Specifically, the alarm-free state may be maintained until the vehicle speed is greater than zero, after which the alarm mechanism introduced in scenario one may be employed.
In other possible cases, when the current urea solution concentration is not measurable, the ECU may use the urea solution concentration value in one period before the non-measurement as an output value, and determine whether to alarm according to whether the urea solution concentration is in an alarm state before the non-measurement. The specific process may be detailed in the flowchart shown in fig. 5, and will not be described herein.
Scene III: the vehicle is powered up again and in an unoperated state.
In some embodiments, after determining that the vehicle is in a re-powered and non-driving state, the ECU may further determine that the urea solution concentration value measured by the current ultrasonic urea quality sensor is less than a preset alarm limit value, and take the measured urea solution concentration value at the current time as an output value. Further, the ECU can jointly determine whether the current moment needs to be warned according to the fact that whether the moment, which is closest to the current moment and is higher than zero, of the last vehicle speed is in a warning state or not and the comparison result of the urea solution concentration value in the current period and the warning limit value. Specifically, referring to fig. 7, a flowchart of an alarm method for abnormal concentration of urea solution in a third scenario provided in the embodiment of the present application specifically includes:
701, determining that the running state of the vehicle at the current moment is a state that the vehicle is not powered up again and is not running.
The specific determination process may be referred to the related description in fig. 3, and will not be described herein.
And 702, determining that the concentration value of the urea solution measured at the current moment is smaller than an alarm limit value.
703, judging whether the last time the vehicle speed is greater than zero is in an alarm state.
If yes, step 704 is continued.
If not, then step 705 is continued.
And 704, determining whether to alarm according to the comparison result of the urea solution concentration value and the alarm limit value in the current period.
Specifically, when the vehicle is in an alarm state before being in a state of not powering on again and not running, if the concentration value of the urea solution in the current period is smaller than the alarm limit value, continuing to alarm. And stopping alarming until the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, namely resetting the alarm.
705, continue to remain in the alarm-free state.
Specifically, the alarm state may be maintained until the vehicle speed is greater than zero, and after the vehicle speed is greater than zero, the alarm mechanism described in scenario one may be employed to determine whether to alarm.
In other embodiments, the ECU may take as output the value the urea solution concentration value during the period immediately preceding the non-measureable time when the current urea solution concentration is not measureable, or may take as output the urea solution concentration value stored during the period when the last vehicle speed is greater than zero.
Alternatively, the ECU may store the urea solution concentration value acquired one cycle before the time of power-down of the vehicle before the vehicle stops. After the vehicle is powered on, the ECU may determine whether a measured value of the urea solution concentration has been obtained after the vehicle is powered on, before the urea solution concentration is not measurable. If not, the stored urea solution concentration value in one period acquired before the vehicle power-down time is adopted as the output value. And whether the current moment needs to be warned or not is determined by combining whether the last moment that the vehicle speed is greater than zero is in a warning state or not. If so, the urea solution concentration value in one period before the urea solution concentration is not measurable is taken as an output value. And determining whether an alarm is required by combining the result of comparing the concentration value of the urea solution in the current period with the alarm limit value with the result of judging whether the concentration of the urea solution is in an alarm state before being undetectable.
Specifically, referring to fig. 8, a flowchart of another alarm method for abnormal concentration of urea solution in scenario three provided in the embodiment of the present application specifically includes:
801, it is determined that the vehicle running state at the current time is a state in which the vehicle is not powered up again and is not running.
The specific determination process may be referred to the related description in fig. 3, and will not be described herein.
802, it is determined that the current urea solution concentration is not measurable.
Specifically, the ECU may determine that the current urea solution concentration is not measurable based on invalid data returned by the ultrasonic urea quality sensor.
803, judging whether to acquire a urea solution concentration value after the current vehicle is electrified.
If yes, proceed to step 804.
If not, step 806 is continued.
804, determining whether the urea solution concentration is in an alarm state before the urea solution concentration is not measurable.
If so, step 805 is continued.
If not, the alarm state is kept continuously.
805, determining whether to alarm according to the urea solution concentration value in the current period.
See step 102 of fig. 1, and will not be described in detail herein.
806, judging whether the last time the vehicle speed is greater than zero is in an alarm state.
If yes, go back to step 805.
If not, the alarm state is kept continuously.
The alarm mechanism under different vehicle running states is introduced by combining three scenes. In some embodiments, the ECU may be further divided into a plurality of functional modules according to the different steps described above that the ECU performs. For example, referring to fig. 9, a schematic structural diagram of an ECU provided in an embodiment of the present application specifically includes:
the data acquisition module is used for acquiring the speed of the vehicle, the liquid level percentage of the urea box, the concentration of urea solution and the like.
The data storage module can be used for storing the data acquired by the data acquisition module. It can also be used to store the urea solution concentration value in the last period before the vehicle is powered down, as described in scenario three above.
The data calculation module is configured to calculate the urea solution concentration value in the current period, for example, the sliding window algorithm described in the foregoing embodiment may be used to calculate the urea solution concentration value in the current period.
The vehicle running state judging module is used for: the method can be used for judging the running state of the vehicle according to the vehicle speed and the power-on and power-off conditions of the vehicle. For example, the vehicle operating condition determination module may be used to perform the various steps described above in fig. 3, and are not repeated here.
And an alarm module: may be used to determine the urea solution concentration output and to determine if an alarm is required. In particular, the alarm module may employ the logic described in the various embodiments above to determine the output value and to determine whether an alarm is required, and is not repeated here.
Based on the same conception as the method, referring to fig. 10, an alarm device 1000 for abnormal concentration of urea solution in an engine is provided in an embodiment of the present application. The apparatus 1000 is configured to perform the steps in the above method, and in order to avoid repetition, a detailed description is omitted here. The apparatus 1000 comprises: an acquisition unit 1001 and a processing unit 1002.
An obtaining unit 1001, configured to obtain a urea solution concentration value in a current period and a vehicle speed at an end time of the current period;
a processing unit 1002 configured to perform:
when the vehicle speed is greater than zero, determining whether to alarm according to a comparison result of the urea solution concentration value in the current period and a preset alarm limit value;
and when the vehicle speed is equal to zero, determining whether to alarm according to whether the vehicle speed is in an alarm state before being equal to zero and the comparison result.
In some embodiments, the obtaining unit 1001 is further configured to obtain a urea solution concentration value at the end of the current period;
The processing unit 1002 is further configured to determine that the urea solution concentration value at the end of the current period is less than the alarm limit value.
In some embodiments, the obtaining unit 1001 is further configured to obtain a urea solution concentration value at the end of the current period;
the processing unit 1002 is further configured to determine whether to alarm according to the comparison result when the urea solution concentration value at the end time of the current period is a set value;
wherein the set value is used for indicating that the concentration of the urea solution is not measurable.
In some embodiments, the processing unit 1002 is specifically configured to:
when the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming;
and when the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm.
In some embodiments, the processing unit 1002 is specifically configured to:
alarming when the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is smaller than the alarm limit value;
when the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm;
And when the vehicle speed is not in an alarm state before being equal to zero, not giving an alarm.
In some embodiments, the processing unit 1002 is further configured to:
it is determined that the engine is in an operating state.
Fig. 11 shows a schematic structural diagram of an electronic device 1100 according to an embodiment of the present application. The electronic device 1100 in the embodiment of the present application may further include a communication interface 1103, where the communication interface 1103 is, for example, a network port, and the electronic device may transmit data through the communication interface 1103.
In the embodiment of the present application, the memory 1102 stores instructions executable by the at least one controller 1101, and the at least one controller 1101 may be configured to perform each step in the above method by executing the instructions stored in the memory 1102, for example, the controller 1101 may implement the functions of the acquiring unit 1001 and the processing unit 1002 in fig. 10.
The controller 1101 is a control center of the electronic device, and may connect various parts of the entire electronic device using various interfaces and lines, by executing or executing instructions stored in the memory 1102, and invoking data stored in the memory 1102. Alternatively, the controller 1101 may include one or more processing units, and the controller 1101 may integrate an application controller and a modem controller, wherein the application controller primarily handles an operating system, application programs, and the like, and the modem controller primarily handles wireless communications. It will be appreciated that the modem controller described above may not be integrated into the controller 1101. In some embodiments, the controller 1101 and the memory 1102 may be implemented on the same chip, and in some embodiments they may be implemented separately on separate chips.
The controller 1101 may be a general purpose controller such as a Central Processing Unit (CPU), digital signal controller, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, and may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present application. The general purpose controller may be a microcontroller or any conventional controller or the like. The steps performed by the data statistics platform disclosed in connection with the embodiments of the present application may be performed directly by a hardware controller, or performed by a combination of hardware and software modules in the controller.
Memory 1102 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The Memory 1102 may include at least one type of storage medium, and may include, for example, flash Memory, hard disk, multimedia card, card Memory, random access Memory (Random Access Memory, RAM), static random access Memory (Static Random Access Memory, SRAM), programmable Read-Only Memory (Programmable Read Only Memory, PROM), read-Only Memory (ROM), charged erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory), magnetic Memory, magnetic disk, optical disk, and the like. Memory 1102 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 1102 in the present embodiment may also be circuitry or any other device capable of implementing a memory function for storing program instructions and/or data.
By programming the controller 1101, for example, codes corresponding to the neural network model training method described in the foregoing embodiment may be cured into the chip, so that the chip can execute the steps of the neural network model training method when running, and how to program the controller 1101 is a technology known to those skilled in the art will not be repeated here.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a controller of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the controller of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (12)
1. An alarm method for abnormal concentration of urea solution of an engine is characterized by comprising the following steps:
acquiring a urea solution concentration value in a current period and a vehicle speed at the end time of the current period;
when the vehicle speed is greater than zero, determining whether to alarm according to a comparison result of the urea solution concentration value in the current period and a preset alarm limit value;
when the vehicle speed is equal to zero, whether to alarm is determined by the following method:
if the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming;
if the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm;
and if the vehicle speed is not in an alarm state before being equal to zero, not giving an alarm.
2. The method of claim 1, wherein the method further comprises:
and acquiring the urea solution concentration value at the ending time of the current period, and determining that the urea solution concentration value at the ending time of the current period is smaller than the alarm limit value.
3. The method of claim 1, wherein the method further comprises:
acquiring a urea solution concentration value at the end time of the current period;
if the concentration value of the urea solution at the ending time of the current period is a set value, determining whether to alarm according to the comparison result;
wherein the set value is used for indicating that the concentration of the urea solution is not measurable.
4. A method according to any one of claims 1-3, characterized in that it determines whether or not to alarm based on the comparison of the urea solution concentration value of the current cycle with a preset alarm limit, in particular comprising:
if the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming is carried out;
and if the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm.
5. A method according to any one of claims 1-3, characterized in that before the urea solution concentration value of the current period and the vehicle speed at the end of the current period are obtained, the method further comprises:
It is determined that the engine is in an operating state.
6. An alarm device for abnormal concentration of urea solution in an engine, comprising:
the acquisition unit is used for acquiring the concentration value of the urea solution in the current period and the vehicle speed at the end time of the current period;
a processing unit configured to perform:
when the vehicle speed is greater than zero, determining whether to alarm according to a comparison result of the urea solution concentration value in the current period and a preset alarm limit value;
when the vehicle speed is equal to zero, whether to alarm is determined by the following method:
if the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming;
if the vehicle speed is in an alarm state before being equal to zero and the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm;
and if the vehicle speed is not in an alarm state before being equal to zero, not giving an alarm.
7. The apparatus of claim 6, wherein the obtaining unit is further configured to obtain a urea solution concentration value at an end of the current period;
the processing unit is further used for determining that the urea solution concentration value at the end time of the current period is smaller than the alarm limit value.
8. The apparatus of claim 6, wherein the obtaining unit is further configured to obtain a urea solution concentration value at an end of the current period;
the processing unit is further used for determining whether to alarm according to the comparison result when the concentration value of the urea solution at the end time of the current period is a set value;
wherein the set value is used for indicating that the concentration of the urea solution is not measurable.
9. The apparatus according to any of the claims 6-8, wherein the processing unit is specifically configured to:
when the concentration value of the urea solution in the current period is smaller than the alarm limit value, alarming;
and when the concentration value of the urea solution in the current period is greater than or equal to the alarm limit value, not giving an alarm.
10. The apparatus of any of claims 6-8, wherein the processing unit is further to:
it is determined that the engine is in an operating state.
11. An electronic device comprising a processor and a memory,
the memory is used for storing a computer program or instructions;
the processor being configured to execute a computer program or instructions in a memory, such that the method of any of claims 1-5 is performed.
12. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the method of any of claims 1-5.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012036840A (en) * | 2010-08-06 | 2012-02-23 | Mitsubishi Fuso Truck & Bus Corp | Device for diagnosing abnormality in quality of urea water |
| JP2015055199A (en) * | 2013-09-12 | 2015-03-23 | いすゞ自動車株式会社 | Urea water concentration erroneous diagnosis prevention system |
| CN108678842A (en) * | 2018-05-16 | 2018-10-19 | 潍柴动力股份有限公司 | A kind of urea concentration detection method, detection device and automobile |
| JP2019073976A (en) * | 2017-10-12 | 2019-05-16 | ボッシュ株式会社 | Diagnosis device and diagnosis method |
| CN110966072A (en) * | 2019-12-24 | 2020-04-07 | 潍柴动力股份有限公司 | Urea concentration fault detection method and device, control equipment and storage medium |
| CN111997722A (en) * | 2020-08-27 | 2020-11-27 | 广西玉柴机器股份有限公司 | Ultrasonic quality sensor strategy for vehicles |
| CN112922700A (en) * | 2021-01-25 | 2021-06-08 | 凯龙高科技股份有限公司 | Device and method for detecting poor urea of SCR (Selective catalytic reduction) system |
| CN113030399A (en) * | 2021-03-29 | 2021-06-25 | 潍柴动力股份有限公司 | Method and device for determining urea concentration |
| CN113611090A (en) * | 2021-08-23 | 2021-11-05 | 潍柴动力股份有限公司 | Urea tank monitoring method and device, electronic equipment and storage medium |
| JP2021181757A (en) * | 2020-05-18 | 2021-11-25 | 株式会社豊田自動織機 | Liquid storage system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3686669B1 (en) * | 2004-10-29 | 2005-08-24 | 日産ディーゼル工業株式会社 | Liquid reducing agent discrimination device |
| JP3686672B1 (en) * | 2004-12-24 | 2005-08-24 | 日産ディーゼル工業株式会社 | Engine exhaust purification system |
-
2022
- 2022-01-17 CN CN202210048857.5A patent/CN114495447B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012036840A (en) * | 2010-08-06 | 2012-02-23 | Mitsubishi Fuso Truck & Bus Corp | Device for diagnosing abnormality in quality of urea water |
| JP2015055199A (en) * | 2013-09-12 | 2015-03-23 | いすゞ自動車株式会社 | Urea water concentration erroneous diagnosis prevention system |
| JP2019073976A (en) * | 2017-10-12 | 2019-05-16 | ボッシュ株式会社 | Diagnosis device and diagnosis method |
| CN108678842A (en) * | 2018-05-16 | 2018-10-19 | 潍柴动力股份有限公司 | A kind of urea concentration detection method, detection device and automobile |
| CN110966072A (en) * | 2019-12-24 | 2020-04-07 | 潍柴动力股份有限公司 | Urea concentration fault detection method and device, control equipment and storage medium |
| JP2021181757A (en) * | 2020-05-18 | 2021-11-25 | 株式会社豊田自動織機 | Liquid storage system |
| CN111997722A (en) * | 2020-08-27 | 2020-11-27 | 广西玉柴机器股份有限公司 | Ultrasonic quality sensor strategy for vehicles |
| CN112922700A (en) * | 2021-01-25 | 2021-06-08 | 凯龙高科技股份有限公司 | Device and method for detecting poor urea of SCR (Selective catalytic reduction) system |
| CN113030399A (en) * | 2021-03-29 | 2021-06-25 | 潍柴动力股份有限公司 | Method and device for determining urea concentration |
| CN113611090A (en) * | 2021-08-23 | 2021-11-05 | 潍柴动力股份有限公司 | Urea tank monitoring method and device, electronic equipment and storage medium |
Non-Patent Citations (2)
| Title |
|---|
| 《2016 12th World Congress on Intelligent Control and Automation (WCICA)》;Bingjing Jiang;A state observer design based on EKF for diesel engine Urea-SCR system;20160929;全文 * |
| 基于离线测试的空气辅助尿素喷射系统控制策略研究;张建华;《中国优秀硕士学位论文全文数据库》;20190115;全文 * |
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