CN114673581A - Method and device for determining whether urea pump is in maintenance waiting state - Google Patents
Method and device for determining whether urea pump is in maintenance waiting state Download PDFInfo
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- CN114673581A CN114673581A CN202210284551.XA CN202210284551A CN114673581A CN 114673581 A CN114673581 A CN 114673581A CN 202210284551 A CN202210284551 A CN 202210284551A CN 114673581 A CN114673581 A CN 114673581A
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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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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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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- 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
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1433—Pumps
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1822—Pump parameters
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a method and a device for determining whether a urea pump is in a state of waiting for maintenance. The invention comprises the following steps: acquiring a plurality of working condition parameters corresponding to the urea pump, and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet the corresponding preset conditions, acquiring a urea pump pressure transient value corresponding to the current time point of the urea pump, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value; determining whether the urea pump is in a state to be maintained or not according to the variance value; and under the condition that the urea pump is determined to be in the state to be maintained, triggering prompt information to remind that the urea pump is in the state to be maintained. The invention solves the problems that the urea pump is overhauled only after the fault is reported in the related technology, and simultaneously the problem that the filter element of the urea system is cleaned within a certain mileage range, the specific operation condition is not considered, and the urea pump is not suitable for all users is solved.
Description
Technical Field
The invention relates to the field of urea pumps, in particular to a method and a device for determining whether a urea pump is in a state to be maintained.
Background
In the related art, a urea pump is a component for sucking urea, pressurizing the urea, and injecting the urea to a post-treatment process through a urea nozzle for reaction, and is easily affected by impurities in a urea solution. In the prior art, the urea pump is usually overhauled after failure reporting, the purpose of preventing the urea pump from being damaged is not achieved, and meanwhile, the filter element of the urea system is cleaned within a certain distance without considering the specific operation condition of the urea pump, so that the urea pump is not suitable for all users.
In view of the above problems in the related art, no effective solution has been proposed so far.
Disclosure of Invention
The invention mainly aims to provide a method and a device for determining whether a urea pump is in a state to be maintained, so as to solve the problems that the urea pump is only overhauled after a fault is reported in the related technology, and simultaneously, a filter element of a urea system is cleaned within a certain mileage, and the method and the device are not suitable for all users without considering specific operation conditions.
To achieve the above object, according to one aspect of the present invention, a method of determining whether a urea pump is in a condition to be serviced is provided. The invention comprises the following steps: acquiring a plurality of working condition parameters corresponding to the urea pump, and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring a urea pump pressure transient value corresponding to the urea pump at the current time point, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the urea pump at the current time point; determining whether the urea pump is in a state to be maintained or not according to the variance value; and under the condition that the urea pump is determined to be in the state to be maintained, triggering prompt information to remind that the urea pump is in the state to be maintained.
Further, a plurality of working condition parameters corresponding to the urea pump are obtained, and the working condition parameters comprise: acquiring the average rotating speed of an engine of a target vehicle in a second preset time period; acquiring the current state of the urea pump, wherein the state is any one of the following states: non-fault state, fault state; acquiring the torque of an engine; acquiring the current air intake flow of the engine; and acquiring the current urea injection quantity corresponding to the urea pump.
Further, respectively judging whether the plurality of working condition parameters satisfy a plurality of preset conditions corresponding to the plurality of working condition parameters, including: judging whether the average rotating speed meets a first preset condition, wherein the first preset condition is that the average rotating speed is less than a preset rotating speed; judging whether the urea pump meets a second preset condition, wherein the second preset condition is that the urea pump is in a non-fault state; judging whether the torque meets a third preset condition, wherein the third preset condition is that the difference value of the torque and the preset torque is in a first numerical range; judging whether the intake air flow meets a fourth preset condition, wherein the fourth preset condition is that the difference value between the intake air flow and the preset intake air flow is in a second numerical range; and judging whether the urea injection quantity meets a fifth preset condition, wherein the fifth preset condition is that the urea injection quantity is larger than the preset urea injection quantity.
Further, determining whether the urea pump is in a state of waiting for maintenance based on the variance value includes: comparing the variance value with a preset value; determining that the urea pump is in a state to be maintained under the condition that the variance value is larger than a preset value; and under the condition that the variance value is smaller than or equal to the preset value, determining that the urea pump is not in a state of waiting for maintenance.
Further, before determining whether the torque satisfies a third preset condition, the method includes: acquiring initial torque corresponding to an engine; and filtering the initial torque to obtain a preset torque.
Further, before determining whether the torque satisfies a third preset condition, the method includes: acquiring initial intake air flow corresponding to the engine; and filtering the initial intake air flow to obtain the preset intake air flow.
Further, before obtaining a plurality of operating condition parameters corresponding to the urea pump, the method further comprises: judging whether the engine is in a preset working condition or not; and under the condition that the engine is in a preset working condition, entering a judging process of judging whether the urea pump is in a state to be maintained, wherein the preset working condition is that the engine is in a constant-speed working state and the engine is in a state of generating pollutants exceeding a preset discharge capacity.
To achieve the above object, according to another aspect of the present invention, there is provided an apparatus for determining whether a urea pump is in a maintenance state. The device includes: the first judgment unit is used for acquiring a plurality of working condition parameters corresponding to the urea pump and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters; the calculation unit is used for acquiring a urea pump pressure transient value corresponding to the current time point of the urea pump under the condition that the working condition parameters respectively meet corresponding preset conditions, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the current time point of the urea pump; the determining unit is used for determining whether the urea pump is in a state to be maintained or not according to the variance value; and the trigger unit is used for triggering prompt information to remind that the urea pump is in the state of waiting for maintenance under the condition that the urea pump is determined to be in the state of waiting for maintenance.
To achieve the above object, according to another aspect of the present application, there is provided a computer readable storage medium including a stored program, wherein the program performs a method of determining whether a urea pump is in a maintenance state according to any one of the above.
To achieve the above object, according to another aspect of the present application, there is provided a processor for running a program, wherein the program performs a method of determining whether a urea pump is in a condition to be serviced in any of the above.
The invention adopts the following steps: acquiring a plurality of working condition parameters corresponding to the urea pump, and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring a urea pump pressure transient value corresponding to the urea pump at the current time point, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the urea pump at the current time point; determining whether the urea pump is in a state to be maintained or not according to the variance value; under the condition that the urea pump is determined to be in the state of waiting to be maintained, prompt information is triggered to remind the urea pump to be in the state of waiting to be maintained, the problem that the urea pump is overhauled only after faults are reported in the related technology is solved, meanwhile, the problem that a filter element of a urea system is cleaned within a certain mileage range, a specific operation working condition is not considered, and the urea pump is not suitable for all users is solved, and the effect of maintaining the urea pump is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
FIG. 1 is a first flowchart of a method for determining whether a urea pump is under maintenance according to an embodiment of the present disclosure;
FIG. 2 is a second flowchart of a method for determining whether a urea pump is pending maintenance according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an apparatus for determining whether a urea pump is in a condition to be serviced according to an embodiment of the present disclosure.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged as appropriate in order to facilitate the embodiments of the invention described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an embodiment of the invention, a method of determining whether a urea pump is pending maintenance is provided.
FIG. 1 is a flow chart of a method of determining whether a urea pump is in a condition for maintenance according to an embodiment of the present disclosure. As shown in fig. 1, the invention comprises the following steps:
step S101, a plurality of working condition parameters corresponding to the urea pump are obtained, and whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters or not is judged respectively.
The urea pump is a component for sucking urea and pressurizing urea and injecting the urea to the post-treatment reaction through the urea nozzle, and is easily affected by impurities in the urea solution. The working condition parameters refer to working parameters under the condition that the urea pump and the action of the urea pump have direct relation, and after the plurality of working condition parameters corresponding to the urea pump are obtained, whether the plurality of working condition parameters meet the plurality of corresponding preset conditions is judged respectively.
And S102, under the condition that the working condition parameters respectively meet the corresponding preset conditions, acquiring a urea pump pressure transient value corresponding to the current time point of the urea pump, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the current time point of the urea pump.
The urea pump pressure transient value is obtained through an engine Electronic Control Unit (ECU), the preset urea pump pressure calibration value can be specifically set according to different scenes, and the variance value between the urea pump pressure transient value and the preset urea pump pressure calibration value is calculated under the condition that a plurality of working condition parameters respectively meet corresponding preset conditions.
And step S103, determining whether the urea pump is in a state to be maintained or not according to the variance value.
The variance is a metric for measuring the difference between the source data and the expected value, and whether the urea pump is in a state to be maintained or not is determined according to the variance value.
And step S104, under the condition that the urea pump is determined to be in the state to be maintained, triggering prompt information to remind that the urea pump is in the state to be maintained.
According to the method, under the condition that the urea pump is determined to be in the state to be maintained according to the variance value, prompt information is triggered to prompt maintenance.
In an alternative example, a plurality of operating condition parameters corresponding to the urea pump are obtained, including: acquiring the average rotating speed of an engine of a target vehicle in a second preset time period; acquiring the current state of the urea pump, wherein the state is any one of the following states: non-fault state, fault state; acquiring the torque of an engine; acquiring the current air intake flow of the engine; and acquiring the current urea injection quantity corresponding to the urea pump.
Above-mentioned, obtain a plurality of operating mode parameters that the urea pump corresponds through engine electronic control unit, wherein, a plurality of operating mode parameters include: the average rotating speed of the engine in the second preset time period, the current state of the urea pump, the torque of the engine and the current urea injection quantity corresponding to the urea pump.
In an optional example, the respectively determining whether the plurality of operating condition parameters satisfy a plurality of preset conditions corresponding to the plurality of operating condition parameters includes: judging whether the average rotating speed meets a first preset condition, wherein the first preset condition is that the average rotating speed is less than a preset rotating speed; judging whether the urea pump meets a second preset condition, wherein the second preset condition is that the urea pump is in a non-fault state; judging whether the torque meets a third preset condition, wherein the third preset condition is that the difference value of the torque and the preset torque is in a first numerical range; judging whether the intake air flow meets a fourth preset condition, wherein the fourth preset condition is that the difference value between the intake air flow and the preset intake air flow is in a second numerical range; and judging whether the urea injection quantity meets a fifth preset condition, wherein the fifth preset condition is that the urea injection quantity is larger than the preset urea injection quantity.
Judging whether a plurality of preset conditions corresponding to the plurality of working condition parameters are met or not according to the plurality of working condition parameters obtained through the electronic control unit of the engine, wherein the first preset condition is that the average rotating speed is less than the preset rotating speed, and the preset rotating speed can be specifically set according to different scenes; the second preset condition is that the urea pump is in a non-failure state; the third preset condition is that the difference value of the torque and the preset torque is in a first numerical range; the fourth preset condition is that the difference between the intake air flow rate and the preset intake air flow rate is in the second numerical range.
In an alternative example, determining whether the urea pump is pending maintenance based on the variance value includes: comparing the variance value with a preset value; determining that the urea pump is in a state to be maintained under the condition that the variance value is larger than a preset value; and under the condition that the variance value is smaller than or equal to the preset value, determining that the urea pump is not in a state to be maintained.
Above-mentioned, when the exhaust gas pollutant that the engine discharged was more, the urea pump can produce the big condition of urea injection volume, and the urea pump has increased contaminated risk, can lead to the fluctuation of urea pump pressure transient value, through monitoring fluctuation, through the variance value control fluctuation promptly, according to the comparison of variance value and preset numerical value, confirms whether the urea pump is in the state of treating the maintenance.
In an alternative example, before determining whether the torque satisfies the third predetermined condition, the method includes: acquiring initial torque corresponding to an engine; and filtering the initial torque to obtain a preset torque.
As described above, the filtering process is an operation of filtering out a specific band frequency in a signal generated by the engine, and is an important measure for suppressing and preventing interference, and the filtering process is performed on the initial torque corresponding to the engine, so as to obtain the preset torque.
In an alternative example, before determining whether the torque satisfies the third preset condition, the method includes: acquiring initial intake air flow corresponding to the engine; and filtering the initial intake air flow to obtain the preset intake air flow.
In the above, the initial intake flow rate corresponding to the engine is filtered to obtain the preset intake flow rate.
In an alternative example, before obtaining the plurality of operating condition parameters corresponding to the urea pump, the method further comprises: judging whether the engine is in a preset working condition or not; and under the condition that the engine is in a preset working condition, entering a judging process of judging whether the urea pump is in a state to be maintained, wherein the preset working condition is that the engine is in a constant-speed working state and the engine is in a state of generating pollutants exceeding a preset discharge capacity.
In the above way, when the engine is in a constant-speed working state and the engine is in a state of generating pollutants exceeding the preset discharge capacity, the urea pump can generate a large amount of urea to react with the pollutants, and the working condition parameters obtained in the above state have higher reliability.
In an embodiment provided by the present application, as shown in fig. 2, fig. 2 is a second flowchart of a method for determining whether a urea pump is in a state to be maintained according to an embodiment of the present invention, where a plurality of operating conditions of the urea pump are determined, and when all of the plurality of operating conditions are satisfied, that is, an average rotation speed is less than a preset rotation speed, the urea pump is in a non-failure state, a difference between a torque and a preset torque is in a first value range, and a difference between an intake flow and a preset intake flow is in a second value range, the variance between a urea pump pressure transient value corresponding to a current time point and a preset urea pump pressure calibration value is calculated, and it is determined whether the variance is greater than a preset value, and when the variance is greater than the preset value, information that the urea pump is in the state to be maintained is pushed.
According to the method for determining whether the urea pump is in the state to be maintained, whether the plurality of working condition parameters meet a plurality of preset conditions corresponding to the plurality of working condition parameters or not is respectively judged by acquiring the plurality of working condition parameters corresponding to the urea pump; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring a urea pump pressure transient value corresponding to the current time point of the urea pump, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the current time point of the urea pump; determining whether the urea pump is in a state to be maintained or not according to the variance value; under the condition that the urea pump is determined to be in the state of waiting for maintenance, prompt information is triggered to remind the urea pump to be in the state of waiting for maintenance, the problems that in the related technology, the urea pump is only overhauled after fault reporting is carried out, meanwhile, the problem that a filter element of a urea system is cleaned within a certain mileage range, specific operation conditions are not considered, and the urea pump is not suitable for all users is solved, and the effect of maintaining the urea pump is achieved.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than here.
The embodiment of the invention also provides a device for determining whether the urea pump is in a state to be maintained, and it should be noted that the device for determining whether the urea pump is in the state to be maintained of the embodiment of the invention can be used for executing the method for determining whether the urea pump is in the state to be maintained of the embodiment of the invention. An apparatus for determining whether a urea pump is in a maintenance state according to an embodiment of the present invention is described below.
FIG. 3 is a schematic diagram of an apparatus for determining whether a urea pump is pending maintenance, according to an embodiment of the present invention. As shown in fig. 3, the apparatus includes: the first judging unit 301 is configured to obtain a plurality of working condition parameters corresponding to the urea pump, and respectively judge whether the plurality of working condition parameters meet a plurality of preset conditions corresponding to the plurality of working condition parameters; the calculating unit 302 is configured to, when the plurality of operating condition parameters respectively satisfy respective corresponding preset conditions, obtain a urea pump pressure transient value corresponding to the urea pump at the current time point, and calculate a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, where the urea pump pressure transient value is a urea pump pressure value corresponding to the urea pump at the current time point; a determining unit 303, configured to determine whether the urea pump is in a state to be maintained according to the variance value; and the triggering unit 304 is configured to trigger a prompt message to remind the urea pump of being in the state to be maintained under the condition that the urea pump is determined to be in the state to be maintained.
In an optional example, the first determining unit 301 includes: the first judgment subunit is used for acquiring the average rotating speed of the engine of the target vehicle in a second preset time period; the second judgment subunit is used for acquiring the current state of the urea pump, and the state is any one of the following states: non-fault state, fault state; the third judging subunit is used for acquiring the torque of the engine; the fourth judgment subunit is used for acquiring the current intake air flow of the engine; and the fifth judging subunit is used for acquiring the current urea injection amount corresponding to the urea pump.
In an alternative example, the first determining unit 301 includes: a sixth judging subunit, configured to judge whether the average rotation speed meets a first preset condition, where the first preset condition is that the average rotation speed is less than a preset rotation speed; the seventh judging subunit is configured to judge whether the urea pump meets a second preset condition, where the second preset condition is that the urea pump is in a non-failure state; the eighth judging subunit is configured to judge whether the torque meets a third preset condition, where the third preset condition is that a difference between the torque and the preset torque is within a first numerical range; the ninth judgment subunit is configured to judge whether the intake air flow meets a fourth preset condition, where the fourth preset condition is that a difference value between the intake air flow and the preset intake air flow is within a second numerical range; and the tenth judging subunit is used for judging whether the urea injection quantity meets a fifth preset condition, wherein the fifth preset condition is that the urea injection quantity is larger than the preset urea injection quantity.
In an alternative example, the determining unit 303 includes: the comparison subunit is used for comparing the variance value with a preset value; the first determining subunit is used for determining that the urea pump is in a state to be maintained under the condition that the variance value is greater than a preset value; and the second determining subunit is used for determining that the urea pump is not in a state to be maintained under the condition that the variance value is smaller than or equal to the preset value.
In an alternative example, the apparatus comprises: the first obtaining unit is used for obtaining an initial torque corresponding to the engine before judging whether the torque meets a third preset condition; and the first filtering unit is used for filtering the initial torque to obtain a preset torque.
In an alternative example, the apparatus comprises: the second acquisition unit is used for acquiring the initial intake air flow corresponding to the engine before judging whether the torque meets a third preset condition; and the second filtering unit is used for filtering the initial air inflow so as to obtain the preset air inflow.
In an optional example, the apparatus further comprises: the second judgment unit is used for judging whether the engine is in a preset working condition or not before acquiring a plurality of working condition parameters corresponding to the urea pump; and the judging unit is used for entering a judging process of judging whether the urea pump is in a state to be maintained or not under the condition that the engine is in a preset working condition, wherein the preset working condition is that the engine is in a constant-speed working state and the engine is in a state of generating pollutants exceeding a preset discharge capacity.
The device for determining whether the urea pump is in a state to be maintained is provided by the embodiment of the invention, and the first judging unit 301 is used for acquiring a plurality of working condition parameters corresponding to the urea pump and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters; a calculating unit 302, configured to, when the multiple working condition parameters respectively satisfy respective corresponding preset conditions, obtain a urea pump pressure transient value corresponding to the current time point of the urea pump, and calculate a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, where the urea pump pressure transient value is a urea pump pressure value corresponding to the current time point of the urea pump; a determining unit 303, configured to determine whether the urea pump is in a state to be maintained according to the variance value; the triggering unit 304 is used for triggering prompt information to remind that the urea pump is in the state of waiting for maintenance under the condition that the urea pump is determined to be in the state of waiting for maintenance, so that the problem that the urea pump is overhauled only after a fault is reported in the related art, and the problem that a filter element of a urea system is cleared within a certain mileage range, specific operation conditions are not considered, and the urea pump is not suitable for all users is solved, and the effect of maintaining the urea pump is further achieved.
The device for determining whether the urea pump is in a state to be maintained comprises a processor and a memory, wherein the first judging unit 301 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The number of the kernels can be one or more, the problem that in the related technology, the urea pump is only overhauled after failure reporting is carried out is solved by adjusting kernel parameters, and meanwhile, the problem that a filter element of a urea system is cleaned within a certain mileage range, a specific operation condition is not considered, and the urea pump is not suitable for all users is solved.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), including at least one memory chip.
Embodiments of the present invention provide a computer readable storage medium having a program stored thereon, which when executed by a processor, implements the method of determining whether a urea pump is in a state of servicing.
Embodiments of the present invention provide a processor for running a program, wherein the program when running performs the method of determining whether a urea pump is pending maintenance.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the following steps: acquiring a plurality of working condition parameters corresponding to the urea pump, and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring a urea pump pressure transient value corresponding to the urea pump at the current time point, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the urea pump at the current time point; determining whether the urea pump is in a state to be maintained or not according to the variance value; and under the condition that the urea pump is determined to be in the state to be maintained, triggering prompt information to remind that the urea pump is in the state to be maintained.
Further, a plurality of working condition parameters corresponding to the urea pump are obtained, and the working condition parameters comprise: acquiring the average rotating speed of an engine of a target vehicle in a second preset time period; acquiring the current state of the urea pump, wherein the state is any one of the following states: non-fault state, fault state; acquiring the torque of an engine; acquiring the current air intake flow of the engine; and acquiring the current urea injection quantity corresponding to the urea pump.
Further, respectively judging whether the plurality of working condition parameters satisfy a plurality of preset conditions corresponding to the plurality of working condition parameters, includes: judging whether the average rotating speed meets a first preset condition, wherein the first preset condition is that the average rotating speed is smaller than a preset rotating speed; judging whether the urea pump meets a second preset condition, wherein the second preset condition is that the urea pump is in a non-fault state; judging whether the torque meets a third preset condition, wherein the third preset condition is that the difference value of the torque and the preset torque is in a first numerical range; judging whether the intake air flow meets a fourth preset condition, wherein the fourth preset condition is that the difference value between the intake air flow and the preset intake air flow is in a second numerical range; and judging whether the urea injection quantity meets a fifth preset condition, wherein the fifth preset condition is that the urea injection quantity is larger than the preset urea injection quantity.
Further, determining whether the urea pump is in a state to be maintained according to the variance value comprises: comparing the variance value with a preset value; determining that the urea pump is in a state to be maintained under the condition that the variance value is larger than a preset value; and under the condition that the variance value is smaller than or equal to the preset value, determining that the urea pump is not in a state to be maintained.
Further, before determining whether the torque satisfies a third preset condition, the method includes: acquiring initial torque corresponding to an engine; and filtering the initial torque to obtain a preset torque.
Further, before determining whether the torque satisfies a third preset condition, the method includes: acquiring initial intake air flow corresponding to the engine; and filtering the initial air inflow to obtain the preset air inflow.
Further, before obtaining a plurality of operating condition parameters corresponding to the urea pump, the method further comprises: judging whether the engine is in a preset working condition or not; and under the condition that the engine is in a preset working condition, entering a judging process of judging whether the urea pump is in a state to be maintained, wherein the preset working condition is that the engine is in a constant-speed working state and the engine is in a state of generating pollutants exceeding a preset discharge capacity.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The invention also provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: acquiring a plurality of working condition parameters corresponding to the urea pump, and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring a urea pump pressure transient value corresponding to the urea pump at the current time point, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the urea pump at the current time point; determining whether the urea pump is in a state to be maintained or not according to the variance value; and under the condition that the urea pump is determined to be in the state to be maintained, triggering prompt information to remind that the urea pump is in the state to be maintained.
Further, a plurality of working condition parameters corresponding to the urea pump are obtained, and the working condition parameters comprise: acquiring the average rotating speed of an engine of a target vehicle in a second preset time period; acquiring the current state of the urea pump, wherein the state is any one of the following states: non-fault state, fault state; acquiring the torque of an engine; acquiring the current air intake flow of the engine; and acquiring the current urea injection quantity corresponding to the urea pump.
Further, respectively judging whether the plurality of working condition parameters satisfy a plurality of preset conditions corresponding to the plurality of working condition parameters, including: judging whether the average rotating speed meets a first preset condition, wherein the first preset condition is that the average rotating speed is less than a preset rotating speed; judging whether the urea pump meets a second preset condition, wherein the second preset condition is that the urea pump is in a non-fault state; judging whether the torque meets a third preset condition, wherein the third preset condition is that the difference value of the torque and the preset torque is in a first numerical range; judging whether the intake air flow meets a fourth preset condition, wherein the fourth preset condition is that the difference value between the intake air flow and the preset intake air flow is in a second numerical range; and judging whether the urea injection quantity meets a fifth preset condition, wherein the fifth preset condition is that the urea injection quantity is larger than the preset urea injection quantity.
Further, determining whether the urea pump is in a state to be maintained according to the variance value comprises: comparing the variance value with a preset value; determining that the urea pump is in a state to be maintained under the condition that the variance value is larger than a preset value; and under the condition that the variance value is smaller than or equal to the preset value, determining that the urea pump is not in a state to be maintained.
Further, before determining whether the torque satisfies a third preset condition, the method includes: acquiring initial torque corresponding to an engine; and filtering the initial torque to obtain a preset torque.
Further, before determining whether the torque satisfies a third preset condition, the method includes: acquiring initial intake air flow corresponding to the engine; and filtering the initial intake air flow to obtain the preset intake air flow.
Further, before obtaining a plurality of operating condition parameters corresponding to the urea pump, the method further comprises: judging whether the engine is in a preset working condition or not; and under the condition that the engine is in a preset working condition, entering a judging process of judging whether the urea pump is in a state to be maintained, wherein the preset working condition is that the engine is in a constant-speed working state and the engine is in a state of generating pollutants exceeding a preset discharge capacity.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor 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 processor 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.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both permanent and non-permanent, removable and non-removable media, may implement the information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that 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 the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 above description is only an example of the present invention and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A method of determining whether a urea pump is in a condition for maintenance, comprising:
acquiring a plurality of working condition parameters corresponding to a urea pump, and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters;
under the condition that the working condition parameters respectively meet the preset conditions corresponding to the working condition parameters, acquiring a urea pump pressure transient value corresponding to the urea pump at the current time point, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the urea pump at the current time point;
Determining whether the urea pump is in a state to be maintained or not according to the variance value;
and under the condition that the urea pump is determined to be in the state to be maintained, triggering prompt information to remind that the urea pump is in the state to be maintained.
2. The method of claim 1, wherein obtaining a plurality of operating condition parameters corresponding to the urea pump comprises:
acquiring the average rotating speed of an engine of a target vehicle in a second preset time period;
acquiring the current state of the urea pump, wherein the state is any one of the following states: non-fault state, fault state;
acquiring the torque of the engine;
acquiring a current intake air flow rate of the engine;
and acquiring the current urea injection quantity corresponding to the urea pump.
3. The method of claim 2, wherein separately determining whether the plurality of operating condition parameters satisfy a plurality of preset conditions corresponding to the plurality of operating condition parameters comprises:
judging whether the average rotating speed meets a first preset condition, wherein the first preset condition is that the average rotating speed is less than a preset rotating speed;
judging whether the urea pump meets a second preset condition, wherein the second preset condition is that the urea pump is in the non-fault state;
Judging whether the torque meets a third preset condition, wherein the third preset condition is that the difference value of the torque and a preset torque is in a first numerical range;
judging whether the intake air flow meets a fourth preset condition, wherein the fourth preset condition is that the difference value between the intake air flow and a preset intake air flow is in a second numerical range;
and judging whether the urea injection quantity meets a fifth preset condition, wherein the fifth preset condition is that the urea injection quantity is larger than a preset urea injection quantity.
4. The method of claim 1, wherein determining whether the urea pump is in a condition to be serviced based on the variance value comprises:
comparing the variance value with a preset value;
determining that the urea pump is in a state to be maintained under the condition that the variance value is larger than the preset value;
and determining that the urea pump is not in a state to be maintained under the condition that the variance value is smaller than or equal to the preset value.
5. The method of claim 3, wherein prior to determining whether the torque satisfies a third preset condition, the method comprises:
acquiring initial torque corresponding to the engine;
And carrying out filtering processing on the initial torque to obtain the preset torque.
6. The method of claim 3, wherein prior to determining whether the torque satisfies a third preset condition, the method comprises:
acquiring initial intake air flow corresponding to the engine;
and filtering the initial air inflow to obtain the preset air inflow.
7. The method of claim 2, wherein prior to obtaining the plurality of operating condition parameters for the urea pump, the method further comprises:
judging whether the engine is in a preset working condition or not;
and under the condition that the engine is in the preset working condition, entering a judging process of judging whether the urea pump is in a state to be maintained, wherein the preset working condition is that the engine is in a constant-speed working state and the engine is in a state of generating pollutants exceeding a preset discharge capacity.
8. An apparatus for determining whether a urea pump is in a condition for maintenance, comprising:
the first judgment unit is used for acquiring a plurality of working condition parameters corresponding to the urea pump and respectively judging whether the working condition parameters meet a plurality of preset conditions corresponding to the working condition parameters;
The calculation unit is used for acquiring a urea pump pressure transient value corresponding to the urea pump at the current time point under the condition that the working condition parameters respectively meet the preset conditions corresponding to the working condition parameters, and calculating a variance value between the urea pump pressure transient value and a preset urea pump pressure calibration value, wherein the urea pump pressure transient value is a urea pump pressure value corresponding to the urea pump at the current time point;
the determining unit is used for determining whether the urea pump is in a state to be maintained or not according to the variance value;
and the triggering unit is used for triggering prompt information to remind that the urea pump is in the state to be maintained under the condition that the urea pump is determined to be in the state to be maintained.
9. A computer-readable storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform a method of determining whether a urea pump is in a condition to be serviced as recited in any one of claims 1 to 7.
10. A processor, characterized in that the processor is configured to run a program, wherein the program when executed performs a method of determining whether a urea pump is under maintenance as claimed in any one of claims 1 to 7.
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| CN110284953A (en) * | 2019-06-28 | 2019-09-27 | 潍柴动力股份有限公司 | Urea pump degree of aging appraisal procedure and device |
| CN111677577A (en) * | 2020-04-22 | 2020-09-18 | 东风商用车有限公司 | Predictive maintenance system and method for SCR urea injection system |
| CN111794842A (en) * | 2020-07-21 | 2020-10-20 | 潍柴动力股份有限公司 | Urea pump early warning method and device |
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