CN115638042A - Carbon loading model correction method and device, storage medium and electronic equipment - Google Patents
Carbon loading model correction method and device, storage medium and electronic equipment Download PDFInfo
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Abstract
The embodiment of the application discloses a carbon load model correction method, a device, a storage medium and electronic equipment, based on executing the carbon load model correction method, according to acquired actual running state data under the current working condition and standard running state data corresponding to the current working condition, a correction coefficient is calculated, the carbon load model for measuring the carbon load is corrected in time based on the correction coefficient, when the running state of an engine is abnormally changed, the acquired actual running state data under the current working condition is different from the standard running state data, the carbon load model can be corrected in time when the running state of the engine is slightly abnormally changed, and the carbon load model of the engine can be corrected in time when the running state of the engine is abnormally changed, and the carbon load sudden-increase condition caused by the abnormal change of the running state of the engine is responded, so that the reliability of the carbon load model is improved, and the overload risk of a diesel particle catcher in the engine is reduced.
Description
Technical Field
The present disclosure relates to the field of engine technologies, and in particular, to a method and an apparatus for correcting a carbon loading model, a storage medium, and an electronic device.
Background
As emissions escalate, diesel Particulate Filters (DPFs) are being used on the six engines as a conventional exhaust treatment device. With the application of DPF, the problem of DPF related failure also comes along, wherein DPF clogging is a failure which is more common and has a larger influence on the use of users. In the prior art, when an engine has air intake leakage or fuel injection deviation, the air-fuel ratio is rapidly deteriorated, and the original smoke emission degree is suddenly increased, however, a carbon loading model for determining the carbon loading capacity cannot timely respond to the sudden change of parameters such as the original smoke emission degree, and cannot timely control a transmitter to start DPF regeneration, so that the DPF reaches an overload limit value, and the aftertreatment fault is increased. Therefore, the carbon loading model in the existing scheme cannot respond to the change of the running state of the engine in time, and the original smoke discharge degree is suddenly increased due to the abnormal change of the running state of the engine, so that when the carbon loading suddenly increases to reach the regeneration limit, a sender cannot be controlled to start DPF regeneration in time, the problem of low reliability of the carbon loading model exists, and the overload risk of a diesel particle catcher in the engine is high.
Disclosure of Invention
The application aims to provide a carbon load model correction method, a carbon load model correction device, a storage medium and electronic equipment.
To achieve the above object:
in a first aspect, the present application provides a method for carbon loading model modification, the method comprising:
acquiring current running state data and standard running state data of an engine, wherein the current running state data comprises the actual oxygen concentration, the actual circulating fuel injection quantity and the current working condition information of the engine; the standard running state data comprises standard oxygen concentration corresponding to the current working condition information and standard circulating fuel oil injection quantity corresponding to the current working condition information;
determining a first correction coefficient according to the actual oxygen concentration and the standard oxygen concentration; the first correction coefficient is generated by calculation in advance based on the original engine smoke degree of an air intake system of the engine in various air leakage states;
determining a second correction coefficient according to the actual circulating fuel oil injection quantity and the standard circulating fuel oil injection quantity; the second correction model is generated by calculation in advance based on the original engine smoke intensity of a fuel system of the engine in various fuel injection deviation states;
and correcting the original carbon load model according to the first correction coefficient and the second correction coefficient to obtain a target carbon load model.
Optionally, the determining a first correction factor according to the actual oxygen concentration and the standard oxygen concentration includes:
determining an oxygen concentration ratio according to the actual oxygen concentration and the standard oxygen concentration;
acquiring a pre-stored first mapping table, and determining the first correction coefficient from the first mapping table according to the actual oxygen concentration and the oxygen concentration ratio; wherein the first mapping table includes a correspondence between the actual oxygen concentration, the oxygen concentration ratio, and the first correction coefficient.
Optionally, the method further comprises:
acquiring a first standard oxygen concentration and a first standard original machine smoke intensity corresponding to a first working condition state; the first working condition state is any one of a plurality of working condition states;
acquiring a first actual oxygen concentration and a first actual original engine smoke degree corresponding to each air leakage state in a plurality of air leakage states included in an air inlet system of the engine under the first working condition state;
determining a first correction coefficient corresponding to each air leakage state in the first working condition state according to the first actual original machine smoke intensity and the first standard original machine smoke intensity;
determining a first oxygen concentration ratio corresponding to each air leakage state according to the first actual oxygen concentration and the first standard oxygen concentration;
and generating and storing a first mapping table according to the first correction coefficient, the first oxygen concentration ratio and the first actual oxygen concentration corresponding to each air leakage state.
Optionally, the determining a second correction factor according to the actual cycle fuel injection quantity and the standard cycle fuel injection quantity includes:
determining the ratio of the fuel injection quantity of the circulating fuel according to the actual fuel injection quantity of the circulating fuel and the standard fuel injection quantity of the circulating fuel;
acquiring a prestored second mapping table, and determining the second correction coefficient from the second mapping table according to the ratio of the actual circulating fuel injection quantity to the circulating fuel injection quantity; and the second mapping table comprises the corresponding relation among the actual circulating fuel injection quantity, the circulating fuel injection quantity ratio and the second correction coefficient.
Optionally, the method further comprises:
acquiring a first standard circulating fuel oil injection quantity and a first standard original engine smoke intensity corresponding to a first working condition state; the first working condition state is any one of a plurality of working condition states;
acquiring a first actual circulating fuel injection quantity and a first actual original engine smoke degree corresponding to each fuel injection deviation state in a plurality of fuel injection deviation states of a fuel system of the engine under the first working condition state;
determining a second correction coefficient corresponding to each fuel injection deviation state according to the first actual original machine smoke intensity and the first standard original machine smoke intensity;
determining a first cycle fuel injection quantity ratio corresponding to each fuel injection deviation state according to the first actual cycle fuel injection quantity and the first standard cycle fuel injection quantity;
and generating and storing a second mapping table according to the second correction coefficient, the first cycle fuel injection quantity ratio and the first actual cycle fuel injection quantity corresponding to each fuel injection deviation state.
Optionally, the correcting the original carbon load model according to the first correction coefficient and the second correction coefficient to obtain a target carbon load model includes:
if the first correction coefficient is larger than a preset threshold value and the second correction coefficient is smaller than or equal to the preset threshold value, correcting the original carbon load model through the first correction coefficient to obtain a target carbon load model;
if the second correction coefficient is larger than a preset threshold value and the first correction coefficient is smaller than or equal to the preset threshold value, correcting the original carbon load model through the second correction coefficient to obtain a target carbon load model;
and if the first correction coefficient and the second correction coefficient are both larger than a preset threshold value, correcting the original carbon load model through the first correction coefficient to obtain a first corrected carbon load model, and then correcting the first corrected carbon load model through the second correction coefficient to obtain a target carbon load model.
Optionally, the method further comprises:
acquiring a first correction frequency of a preset time period; the first correction times are times that the first correction coefficient and/or the second correction coefficient are larger than the preset threshold; the preset time period is a time period corresponding to the carbon loading measured by the target carbon loading model from an initial value to a regeneration limit value of the particle catcher;
acquiring the total calculation times of the preset time period; the total calculation times are times of calculating the first correction coefficient or the second correction coefficient;
determining a correction proportion value according to the first correction times and the total calculation times;
and if the correction proportion value is larger than a preset ratio, generating alarm information.
In a second aspect, the present application also provides a carbon loading model correction apparatus, the apparatus comprising:
the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring current running state data and standard running state data of an engine, and the current running state data comprises the actual oxygen concentration, the actual circulating fuel oil injection quantity and the current working condition information of the engine; the standard running state data comprises standard oxygen concentration corresponding to the current working condition information and standard circulating fuel oil injection quantity corresponding to the current working condition information;
a first determination unit configured to determine a first correction coefficient based on the actual oxygen concentration and the standard oxygen concentration; the first correction coefficient is generated by calculation in advance based on the original engine smoke degree of an air intake system of the engine in various air leakage states;
the second determining unit is used for determining a second correction coefficient according to the actual circulating fuel oil injection quantity and the standard circulating fuel oil injection quantity; the second correction model is generated by calculation in advance based on the original engine smoke intensity of a fuel system of the engine in various fuel injection deviation states;
and the correcting unit is used for correcting the original carbon load model according to the first correction coefficient and the second correction coefficient to obtain a target carbon load model.
In a third aspect, the present application also provides a computer readable storage medium having computer program instructions stored therein that, when executed, implement the carbon load model modification method of any of the first aspects.
In a fourth aspect, the present application further provides an electronic device, including: a memory and at least one processor;
instructions are stored in the memory;
the at least one processor invokes instructions in the memory to cause the electronic device to implement the carbon load model modification method of any one of the first aspects.
The embodiment of the application provides a carbon load model correction method, a carbon load model correction device, a storage medium and electronic equipment, wherein current running state data and standard running state data of an engine are acquired based on execution of the carbon load model correction method, and the current running state data comprises actual oxygen concentration, actual circulating fuel oil injection quantity and current working condition information of the engine; the standard operation state data comprises standard oxygen concentration corresponding to the current working condition information and standard circulating fuel injection quantity corresponding to the current working condition information; determining a first correction coefficient according to the actual oxygen concentration and the standard oxygen concentration; determining a second correction coefficient according to the actual circulating fuel oil injection quantity and the standard circulating fuel oil injection quantity; and correcting the original carbon load model according to the first correction coefficient and/or the second correction coefficient to obtain a target carbon load model. It can be seen that, according to the carbon loading model correction method in the embodiment of the present application, a correction coefficient is calculated according to the acquired actual running state data under the current working condition and the standard running state data corresponding to the current working condition, and the carbon loading model for determining the carbon loading is corrected in time based on the correction coefficient.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is an overall structural diagram of a carbon loading model correction system according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a method for carbon loading model modification provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a carbon loading model correction device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
First, a description is made of terms mentioned in the embodiments of the present application:
oxidation catalytic converter (DOC): installed in an engine exhaust line to convert carbon monoxide (CO) and Hydrocarbons (HC) in engine exhaust gas into harmless water (H) by oxidation reaction 2 0) And carbon dioxide (CO) 2 ) The apparatus of (1).
Diesel Particulate trap (Diesel Particulate Filter, DPF): belonging to a part of low-emission after-treatment and used for filtering particles in engine exhaust.
Selective Catalytic Reduction (SCR) is realized by an SCR reactor, and NO are selectively reduced by a reducing agent NH3 at 290-400 ℃ under the action of a catalyst 2 Reduction to N 2 。
An Electronic Control Unit (ECU), i.e., a central Control Unit of the vehicle.
As shown in fig. 1, the overall structure diagram of the carbon load model correction system adopting the carbon load model correction method is shown in fig. 1, and the overall structure diagram of the carbon load model correction system in fig. 1 includes an air inlet pipeline, an engine main body, an exhaust pipeline and upstream NO x A sensor, a temperature and pressure sensor, an ECU and a supercharger a; wherein, DOC, DPF, SCR (namely SCR reactor) form the engine exhaust pipeline; upstream NO x The oxygen concentration of the tail gas after combustion measured by the sensor is used as the actual oxygen concentration O 2Act And sending the actual oxygen concentration to the ECU; the temperature and pressure sensor is used for measuring the air inlet pressure and the air inlet temperature so as to calculate the air inlet amount, and the air inlet amount is obtained according to the calculationThe actual circulating fuel oil injection quantity can be determined and sent to the ECU; ECU receives the actual oxygen concentration O 2Act And the actual circulating fuel injection quantity to determine a first correction factor (K) 1 ) And a second correction coefficient (K) 2 ) Based on K 1 And K 2 The carbon loading model used to determine carbon loading was modified.
In the embodiment of the application, the carbon loading model correction system is based on a carbon loading model correction method, the ECU can calculate the correction coefficient according to the acquired actual running state data under the current working condition and the standard running state data corresponding to the current working condition, so that the carbon loading model for measuring the carbon loading can be corrected in time based on the correction coefficient, when the running state of the engine is abnormally changed, the acquired actual running state data under the current working condition is different from the standard running state data, the correction coefficient can be determined in time to correct even when the running state of the engine is slightly abnormally changed, so that when the running state of the engine is abnormally changed, the carbon loading model of the DPF is corrected in time, and the carbon loading sudden-increase condition caused by the abnormal change of the running state of the engine is responded, so that the reliability of the carbon loading model is improved, and the overload risk of a Diesel particle trap (DPF) in the engine is reduced.
The carbon load model correction method can be applied to vehicles with diesel engines, particularly but not limited to tractors, large-sized automobiles, diesel locomotives, civil engineering, excavators, loaders, fishing boats, diesel generator sets and agricultural machinery, can be determined according to actual conditions, and is within the protection scope of the method.
In the following, a carbon loading model modification method in the present application is described in detail:
fig. 2 is a flowchart of a carbon loading model correction method according to an embodiment of the present disclosure. As shown in fig. 2, the method for correcting the carbon loading model in the embodiment of the present application includes:
s101: acquiring current operating state data and standard operating state data of an engine, wherein the current operating state data comprises the actual oxygen concentration, the actual circulating fuel oil injection quantity and the current working condition information of the engine; the standard running state data comprises a standard oxygen concentration corresponding to the current working condition information and a standard circulating fuel injection quantity corresponding to the current working condition information;
it should be noted that the standard running state data of the engine is acquired and stored during bench development, when the engine is developed in a standard test bench, the air inlet pipeline is installed in a standard and has NO air leakage, the fuel system is injected normally, the engine burns normally, and the upstream NO in the aftertreatment is converted into the normal NO x The oxygen concentration of the tail gas after combustion synchronously measured by the sensor is taken as the standard oxygen concentration O 2Des . When the engine pedestal is developed, the original engine smoke intensity is tested in a standard normal state aiming at each working condition, and the standard original engine smoke intensity Ses under each working condition is completed Des Standard oxygen concentration O 2Des Standard circulating fuel oil injection quantity q Des And collecting and storing data collected under the standard normal state of each working condition as a standard model in the ECU. The normal state is that the air intake system of the engine has no air intake leakage condition and the fuel system has no fuel injection deviation condition.
The current working condition information of the vehicle engine can be determined according to parameters such as engine torque, rotating speed and the like, and is not limited in detail here and is within the protection scope of the present application.
S102: determining a first correction coefficient according to the actual oxygen concentration and the standard oxygen concentration; the first correction coefficient is generated by calculation in advance based on the original engine smoke degree of an air intake system of the engine in various air leakage states;
specifically, the determining a first correction coefficient according to the actual oxygen concentration and the standard oxygen concentration includes: determining an oxygen concentration ratio according to the actual oxygen concentration and the standard oxygen concentration; acquiring a pre-stored first mapping table, and determining the first correction coefficient from the first mapping table according to the actual oxygen concentration and the oxygen concentration ratio; wherein the first mapping table includes a correspondence between the actual oxygen concentration, the oxygen concentration ratio, and the first correction coefficient.
It should be noted that, since the collection of the smoke intensity of the original machine in the running process of the vehicle requires complex design and development cost, in order to further reduce the cost and improve the correction efficiency of the carbon loading model, the first correction parameter in the embodiment of the present application is pre-calculated during rack development, and a first mapping table is established based on the correspondence between the actual oxygen concentration, the oxygen concentration ratio and the first correction coefficient, and can be directly obtained based on the query of the first mapping table in the actual carbon loading model correction process; in this embodiment of the present application, the method for determining the first correction parameter of different gas leakage states and the method for establishing the first mapping table are specifically as follows:
acquiring a first standard oxygen concentration and a first standard original machine smoke intensity corresponding to a first working condition state; the first working condition state is any one of a plurality of working condition states; acquiring a first actual oxygen concentration and a first actual original engine smoke degree corresponding to each air leakage state in a plurality of air leakage states included in an air inlet system of the engine under the first working condition state; determining a first correction coefficient corresponding to each air leakage state in the first working condition state according to the first actual original machine smoke intensity and the first standard original machine smoke intensity; determining a first oxygen concentration ratio corresponding to each air leakage state according to the first actual oxygen concentration and the first standard oxygen concentration; and generating and storing a first mapping table according to the first correction coefficient, the first oxygen concentration ratio and the first actual oxygen concentration corresponding to each air leakage state.
It should be noted that, in the embodiment of the present application, in an engine development test, an air leakage condition of an air intake pipeline of an engine is simulated, and a possible air leakage state of an air intake system is tested under each working condition of the engine 2Act Can be correspondingly changed based on the collection of the actual original smoke level Ses in different air leakage states Act And the actual oxygen concentration O 2Act Obtaining the smoke intensity correction coefficient (i.e. the first correction coefficient) K under different air leakage states 1 =Ses Act /Ses Des Based on the actual oxygen concentration O 2Act K1 and oxygen concentration ratio (O) 2Act /O 2Des ) A first mapping table is established. The expression form of the first mapping table may be a matrix mapping form.
S103: determining a second correction coefficient according to the actual circulating fuel oil injection quantity and the standard circulating fuel oil injection quantity; the second correction model is generated by calculation in advance based on the original engine smoke intensity of a fuel system of the engine in various fuel injection deviation states;
specifically, the determining a second correction coefficient according to the actual cycle fuel injection quantity and the standard cycle fuel injection quantity includes: determining the ratio of the fuel injection quantity of the circulating fuel according to the actual fuel injection quantity of the circulating fuel and the standard fuel injection quantity of the circulating fuel; acquiring a prestored second mapping table, and determining the second correction coefficient from the second mapping table according to the ratio of the actual circulating fuel injection quantity to the circulating fuel injection quantity; and the second mapping table comprises the corresponding relation among the actual circulating fuel injection quantity, the circulating fuel injection quantity ratio and the second correction coefficient.
The second correction coefficient in the embodiment of the application is pre-calculated during rack development, and a second mapping table is established based on the corresponding relation among the actual cycle fuel injection quantity, the standard cycle fuel injection quantity and the second correction coefficient, and can be directly obtained based on the second mapping table query in the actual carbon load model correction process; in the embodiment of the application, for each working condition, the determination method of the second correction parameter and the establishment method of the second mapping table corresponding to different fuel injection deviation states of the fuel system under different degrees of fuel system deterioration are specifically as follows:
acquiring a first standard circulating fuel oil injection quantity and a first standard original engine smoke intensity corresponding to a first working condition state; the first working condition state is any one of a plurality of working condition states; acquiring a first actual circulating fuel injection quantity and a first actual original engine smoke degree corresponding to each fuel injection deviation state in a plurality of fuel injection deviation states of a fuel system of the engine under the first working condition state; determining a second correction coefficient corresponding to each fuel injection deviation state in the first working condition state according to the first actual original machine smoke intensity and the first standard original machine smoke intensity; determining a first cycle fuel injection quantity ratio corresponding to each fuel injection deviation state according to the first actual cycle fuel injection quantity and the first standard cycle fuel injection quantity; and generating and storing a second mapping table according to the second correction coefficient, the first cycle fuel injection quantity ratio and the first actual cycle fuel injection quantity corresponding to each fuel injection deviation state.
It should be noted that, in the embodiment of the present application, in an engine development test, different degrees of deterioration of an engine fuel system are simulated, different fuel injection deviation states that may exist in the fuel system are tested for each working condition of the engine, and as for different working conditions, the original engine smoke intensity, the intake pressure and the temperature also change correspondingly under different fuel injection deviation states of the fuel system, based on the collection of the actual original engine smoke intensity Ses under different fuel injection deviation states under different engine working conditions of the fuel system Act Obtaining the actual circulating fuel oil injection quantity of the engine through the intake pressure, the intake temperature and the actual oxygen concentration, and calculating the smoke intensity correction coefficient (namely a first correction coefficient) K under different fuel oil injection deviation states 2 =Ses Act /Ses Des Then, based on a second correction coefficient K corresponding to each fuel injection deviation state under each working condition 2 And establishing a second mapping table according to the ratio of the circulating fuel oil injection quantity and the actual circulating fuel oil injection quantity. The expression form of the second mapping table may be a matrix mapping form.
Wherein, the actual circulating fuel oil injection quantity q Act The specific calculation formula is as follows:
wherein n is Rotational speed of engine The actual torque for the engine at the current fuel injection bias condition can be read from the ECU, n Number of cylinders of engine Can be obtained from parameters of the vehicleIs a fixed attribute parameter of the vehicle, m Total air input Calculated by using an ideal gas equation to obtain m Total air input The specific calculation formula is as follows:
wherein, V Volume of intake air Can read from ECU, the intake volume corresponds to working condition; p Pressure of intake air Is the intake pressure and T Temperature of inlet air The air inlet temperature, the air inlet pressure and the air inlet temperature are measured in real time by an air inlet temperature pressure sensor, R is an ideal gas coefficient and generally takes the value of 8.314 J.mol -1 ·K -1 。
S104: and correcting the original carbon load model according to the first correction coefficient and the second correction coefficient to obtain a target carbon load model.
Specifically, the correcting the original carbon load model according to the first correction coefficient and the second correction coefficient to obtain a target carbon load model includes: if the first correction coefficient is larger than a preset threshold value, and the second correction coefficient is smaller than or equal to the preset threshold value, correcting the original carbon load model through the first correction coefficient to obtain a target carbon load model; if the second correction coefficient is larger than a preset threshold value and the first correction coefficient is smaller than or equal to the preset threshold value, correcting the original carbon load model through the second correction coefficient to obtain a target carbon load model; and if the first correction coefficient and the second correction coefficient are both larger than a preset threshold value, correcting the original carbon load model through the first correction coefficient to obtain a first corrected carbon load model, and then correcting the first corrected carbon load model through the second correction coefficient to obtain a target carbon load model.
The preset threshold is 1, that is, if the determined first correction coefficient is not 1, the actual oxygen concentration is different from the standard oxygen concentration in the standard model, air leakage exists in an air inlet system of the engine, and if the determined second correction coefficient is not 1, the actual fuel injection quantity of the circulating fuel is different from the standard fuel injection quantity in the standard model, fuel injection deviation exists in a fuel system of the engine, and the situation that the carbon loading capacity is increased suddenly may exist.
It should be noted that, when the carbon load model is corrected based on the first correction parameter and/or the second correction parameter, the output value of the original carbon load model may be increased by the first correction parameter and/or the second correction parameter to obtain the target carbon load model, and the output value of the target carbon load model is the accumulated value of the carbon load increased by the first correction parameter and/or the second correction parameter, so that the accumulated value of the carbon load conforms to the actual operating smoke intensity condition. Therefore, the change of the running state of the engine is responded in time, and once the final carbon loading model reaches the regeneration limit value, regeneration is triggered in time, so that sudden overload under unknown conditions is avoided.
In this embodiment of the application, K may also be counted in a time period corresponding to the period from the start of accumulating the carbon loading amount to the time when the carbon loading amount determined by the carbon loading amount model reaches the regeneration limit value of the particle trap 1 And/or K 2 A ratio greater than 1, i.e. counting the coefficient K in the interval of one regeneration 1 And/or K 2 A ratio greater than 1, if both ratios greater than 1 are within 40%, the system is considered acceptable; if the coefficient K in a regeneration interval 1 And/or K 2 If the proportion of more than 1 is more than 40%, the user is synchronously reminded of entering the station for maintenance, and the maintenance personnel can use the coefficient K 1 And K 2 The cause of the fault is locked. Specifically, the method further comprises:
acquiring a first correction frequency of a preset time period; the first correction times are times that the first correction coefficient and/or the second correction coefficient are larger than the preset threshold; the preset time period is a time period corresponding to the carbon loading measured by the target carbon loading model from an initial value to a regeneration limit value of the particle catcher; acquiring the total calculation times of the preset time period; the total calculation times are times of calculating the first correction coefficient or the second correction coefficient; determining a correction proportion value according to the first correction times and the total calculation times; and if the correction proportion value is larger than a preset ratio, generating alarm information.
The preset time period is a time period corresponding to a primary regeneration interval, and the preset ratio is 40%.
According to the method for correcting the carbon loading model, a correction coefficient is calculated according to the acquired actual running state data under the current working condition and the standard running state data corresponding to the current working condition, the carbon loading model for measuring the carbon loading is corrected in time based on the correction coefficient, and the acquired actual running state data under the current working condition is different from the standard running state data when the running state of the engine is abnormally changed, so that the carbon loading model can be corrected in time when the running state of the engine is abnormally changed, and the carbon loading sudden increase condition caused by the abnormal change of the running state of the engine is responded in time, so that the reliability of the carbon loading model is improved, and the overload risk of a diesel particle catcher in the engine is reduced.
Referring to fig. 3, based on the carbon loading model correction method in the foregoing embodiment, the carbon loading model correction method is implemented by a carbon loading model correction device in the present embodiment, where the carbon loading model correction device in the present embodiment includes:
the system comprises a first acquisition unit 10, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring current running state data and standard running state data of an engine, and the current running state data comprises the actual oxygen concentration, the actual circulating fuel injection quantity and the current working condition information of the engine; the standard running state data comprises a standard oxygen concentration corresponding to the current working condition information and a standard circulating fuel injection quantity corresponding to the current working condition information;
a first determination unit 20 for determining a first correction coefficient based on the actual oxygen concentration and the standard oxygen concentration; the first correction coefficient is generated by calculation in advance based on the original engine smoke degrees of the air intake system of the engine in various air leakage states;
the second determining unit 30 is configured to determine a second correction coefficient according to the actual cycle fuel injection quantity and the standard cycle fuel injection quantity; the second correction model is generated by calculation in advance based on the original engine smoke intensity of a fuel system of the engine in various fuel injection deviation states;
and the correcting unit 40 is configured to correct the original carbon load model according to the first correction coefficient and the second correction coefficient to obtain a target carbon load model.
The first determining unit 20 is specifically configured to:
determining an oxygen concentration ratio according to the actual oxygen concentration and the standard oxygen concentration; acquiring a pre-stored first mapping table, and determining the first correction coefficient from the first mapping table according to the actual oxygen concentration and the oxygen concentration ratio; wherein the first mapping table includes a correspondence between the actual oxygen concentration, the oxygen concentration ratio, and the first correction coefficient.
The carbon loading model correction device further comprises:
the second acquisition unit is used for acquiring a first standard oxygen concentration and a first standard original machine smoke intensity corresponding to the first working condition state; the first working condition state is any one of a plurality of working condition states;
the first acquisition unit is used for acquiring a first actual oxygen concentration and a first actual original engine smoke degree corresponding to each air leakage state in a plurality of air leakage states of an air inlet system of the engine in the first working condition state;
the first calculation unit is used for determining a first correction coefficient corresponding to each air leakage state in the first working condition state according to the first actual original machine smoke intensity and the first standard original machine smoke intensity; determining a first oxygen concentration ratio corresponding to each air leakage state according to the first actual oxygen concentration and the first standard oxygen concentration;
and the first generating unit is used for generating and storing a first mapping table according to the first correction coefficient, the first oxygen concentration ratio and the first actual oxygen concentration corresponding to each air leakage state.
The second determining unit 30 is specifically configured to:
determining the ratio of the fuel injection quantity of the circulating fuel according to the actual fuel injection quantity of the circulating fuel and the standard fuel injection quantity of the circulating fuel; acquiring a prestored second mapping table, and determining the second correction coefficient from the second mapping table according to the ratio of the actual circulating fuel injection quantity to the circulating fuel injection quantity; and the second mapping table comprises the corresponding relation among the actual circulating fuel injection quantity, the circulating fuel injection quantity ratio and the second correction coefficient.
The carbon loading model correction device further comprises:
the third acquisition unit is used for acquiring the first standard circulating fuel oil injection quantity and the first standard original engine smoke intensity corresponding to the first working condition state; the first working condition state is any one of a plurality of working condition states;
the second acquisition unit is used for acquiring a first actual circulating fuel injection quantity and a first actual original engine smoke degree corresponding to each fuel injection deviation state in a plurality of fuel injection deviation states of the fuel system of the engine under the first working condition state;
the second calculation unit is used for determining a second correction coefficient corresponding to each fuel injection deviation state in the first working condition state according to the first actual original engine smoke intensity and the first standard original engine smoke intensity; determining a first cycle fuel injection quantity ratio corresponding to each fuel injection deviation state according to the first actual cycle fuel injection quantity and the first standard cycle fuel injection quantity;
and the second generating unit is used for generating and storing a second mapping table according to the second correction coefficient, the first circulating fuel injection quantity ratio and the first actual circulating fuel injection quantity corresponding to each fuel injection deviation state.
The correction unit 40 is specifically configured to:
if the first correction coefficient is larger than a preset threshold value and the second correction coefficient is smaller than or equal to the preset threshold value, correcting the original carbon load model through the first correction coefficient to obtain a target carbon load model;
if the second correction coefficient is larger than a preset threshold value and the first correction coefficient is smaller than or equal to the preset threshold value, correcting the original carbon load model through the second correction coefficient to obtain a target carbon load model;
and if the first correction coefficient and the second correction coefficient are both larger than a preset threshold value, correcting the original carbon load model through the first correction coefficient to obtain a first corrected carbon load model, and then correcting the first corrected carbon load model through the second correction coefficient to obtain a target carbon load model.
The carbon loading model correction device further comprises:
the fourth acquisition unit is used for acquiring the first correction times of the preset time period; the first correction times are times that the first correction coefficient and/or the second correction coefficient are larger than the preset threshold; the preset time period is a time period corresponding to the carbon loading measured by the target carbon loading model from an initial value to a regeneration limit value of the particle catcher; acquiring the total calculation times of the preset time period; the total calculation times are times of calculating the first correction coefficient or the second correction coefficient;
a third calculating unit, configured to determine a correction ratio value according to the first correction frequency and the total calculation frequency;
and the alarm unit is used for generating alarm information if the correction proportion value is greater than a preset ratio.
The carbon loading model correcting device in the embodiment of the application calculates the correction coefficient according to the acquired actual running state data under the current working condition and the standard running state data corresponding to the current working condition, corrects the carbon loading model for measuring the carbon loading on the basis of the correction coefficient, and when the running state of the engine abnormally changes, the acquired actual running state data under the current working condition is different from the standard running state data, so that the carbon loading model can be corrected in time even if the running state of the engine abnormally changes to a small extent, and the carbon loading model can be corrected in time when the running state of the engine abnormally changes, and the carbon loading suddenly-increasing condition caused by the abnormal change of the running state of the engine is responded in time, thereby improving the reliability of the carbon loading model and reducing the overload risk of a diesel particle catcher in the engine.
The present application also provides a computer readable storage medium having computer program instructions stored therein, which when executed, implement the carbon load model correction method as described in any one of the above.
Computer-readable storage media of the present embodiments, including both non-transitory and non-transitory, removable and non-removable media, may implement 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.
Another aspect of the present application further provides an electronic device, including: a memory and at least one processor; instructions are stored in the memory; the at least one processor invokes instructions in the memory to cause the electronic device to implement the carbon load model revision method as described above.
Specifically, the apparatus may include: a processor, a memory, an input/output interface, a communication interface, and a bus. Wherein the processor, the memory, the input/output interface and the communication interface are communicatively connected to each other within the device by a bus.
The processor may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute a relevant program to implement the technical solution provided in the embodiments of the present Application.
The Memory may be implemented in the form of a ROM (Read Only Memory), a RAM (Random access Memory), a static storage device, a dynamic storage device, or the like. The memory can store an operating system and other application programs, and when the technical solution provided by the embodiments of the present application is implemented by software or firmware, the relevant program codes are stored in the memory and called by the processor to be executed.
The input/output interface is used for connecting the input/output module to realize information input and output. The input/output module may be configured as a component within the device (not shown) or may be external to the device to provide corresponding functionality. The input devices may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output devices may include a display, a speaker, a vibrator, an indicator light, etc.
The communication interface is used for connecting a communication module (not shown in the figure) to realize the communication interaction of the equipment and other equipment. The communication module can realize communication in a wired mode (such as USB, network cable and the like) and also can realize communication in a wireless mode (such as mobile network, WIFI, bluetooth and the like).
A bus includes a path that transfers information between the various components of the device, such as the processor, memory, input/output interfaces, and communication interfaces.
It should be noted that although the above-described device shows only a processor, a memory, an input/output interface, a communication interface and a bus, in a specific implementation, the device may also include other components necessary for normal operation. In addition, those skilled in the art will appreciate that the above-described apparatus may also include only the components necessary to implement the embodiments of the present application, and need not include all of the components shown in the figures.
The electronic device of the foregoing embodiment is used to implement the corresponding carbon loading model correction method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which are not described herein again.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of carbon loading model modification, the method comprising:
acquiring current operating state data and standard operating state data of an engine, wherein the current operating state data comprises the actual oxygen concentration, the actual circulating fuel oil injection quantity and the current working condition information of the engine; the standard running state data comprises a standard oxygen concentration corresponding to the current working condition information and a standard circulating fuel injection quantity corresponding to the current working condition information;
determining a first correction coefficient according to the actual oxygen concentration and the standard oxygen concentration; the first correction coefficient is generated by calculation in advance based on the original engine smoke degree of an air intake system of the engine in various air leakage states;
determining a second correction coefficient according to the actual circulating fuel oil injection quantity and the standard circulating fuel oil injection quantity; the second correction model is generated by calculation in advance based on the original engine smoke intensity of a fuel system of the engine in various fuel injection deviation states;
and correcting the original carbon load model according to the first correction coefficient and the second correction coefficient to obtain a target carbon load model.
2. The method of claim 1, wherein determining a first correction factor based on the actual oxygen concentration and the standard oxygen concentration comprises:
determining an oxygen concentration ratio according to the actual oxygen concentration and the standard oxygen concentration;
acquiring a pre-stored first mapping table, and determining the first correction coefficient from the first mapping table according to the actual oxygen concentration and the oxygen concentration ratio; wherein the first mapping table includes a correspondence between the actual oxygen concentration, the oxygen concentration ratio, and the first correction coefficient.
3. The method of claim 1, further comprising:
acquiring a first standard oxygen concentration and a first standard original machine smoke intensity corresponding to a first working condition state; the first working condition state is any one of a plurality of working condition states;
acquiring a first actual oxygen concentration and a first actual original engine smoke degree corresponding to each air leakage state in a plurality of air leakage states included in an air inlet system of the engine under the first working condition state;
determining a first correction coefficient corresponding to each air leakage state in the first working condition state according to the first actual original machine smoke intensity and the first standard original machine smoke intensity;
determining a first oxygen concentration ratio corresponding to each air leakage state according to the first actual oxygen concentration and the first standard oxygen concentration;
and generating and storing a first mapping table according to the first correction coefficient, the first oxygen concentration ratio and the first actual oxygen concentration corresponding to each air leakage state.
4. The method of claim 1, wherein said determining a second correction factor based on said actual cycle fuel injection quantity and said standard cycle fuel injection quantity comprises:
determining the ratio of the fuel injection quantity of the circulating fuel according to the actual fuel injection quantity of the circulating fuel and the standard fuel injection quantity of the circulating fuel;
acquiring a prestored second mapping table, and determining the second correction coefficient from the second mapping table according to the actual cycle fuel injection quantity and the cycle fuel injection quantity ratio; and the second mapping table comprises the corresponding relation among the actual circulating fuel injection quantity, the circulating fuel injection quantity ratio and the second correction coefficient.
5. The method of claim 1, further comprising:
acquiring a first standard circulating fuel oil injection quantity and a first standard original engine smoke intensity corresponding to a first working condition state; the first working condition state is any one of a plurality of working condition states;
acquiring a first actual circulating fuel injection quantity and a first actual original engine smoke degree corresponding to each fuel injection deviation state in a plurality of fuel injection deviation states of a fuel system of the engine under the first working condition state;
determining a second correction coefficient corresponding to each fuel injection deviation state according to the first actual original engine smoke degree and the first standard original engine smoke degree;
determining a first cycle fuel injection quantity ratio corresponding to each fuel injection deviation state according to the first actual cycle fuel injection quantity and the first standard cycle fuel injection quantity;
and generating and storing a second mapping table according to the second correction coefficient, the first cycle fuel injection quantity ratio and the first actual cycle fuel injection quantity corresponding to each fuel injection deviation state.
6. The method of claim 1, wherein the modifying the original carbon load model based on the first correction factor and the second correction factor to obtain a target carbon load model comprises:
if the first correction coefficient is larger than a preset threshold value and the second correction coefficient is smaller than or equal to the preset threshold value, correcting the original carbon load model through the first correction coefficient to obtain a target carbon load model;
if the second correction coefficient is larger than a preset threshold value and the first correction coefficient is smaller than or equal to the preset threshold value, correcting the original carbon loading model through the second correction coefficient to obtain a target carbon loading model;
and if the first correction coefficient and the second correction coefficient are both larger than a preset threshold value, correcting the original carbon load model through the first correction coefficient to obtain a first corrected carbon load model, and then correcting the first corrected carbon load model through the second correction coefficient to obtain a target carbon load model.
7. The method of claim 1, further comprising:
acquiring a first correction frequency of a preset time period; the first correction times are times that the first correction coefficient and/or the second correction coefficient are larger than a preset threshold; the preset time period is a time period corresponding to the carbon loading measured by the target carbon loading model from an initial value to a regeneration limit value of the particle catcher;
acquiring the total calculation times of the preset time period; the total calculation times are times of calculating the first correction coefficient or the second correction coefficient;
determining a correction proportion value according to the first correction times and the total calculation times;
and if the correction proportion value is larger than a preset ratio, generating alarm information.
8. A carbon loading model modification apparatus, the apparatus comprising:
the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring current running state data and standard running state data of an engine, and the current running state data comprises the actual oxygen concentration, the actual circulating fuel oil injection quantity and the current working condition information of the engine; the standard running state data comprises standard oxygen concentration corresponding to the current working condition information and standard circulating fuel oil injection quantity corresponding to the current working condition information;
a first determination unit configured to determine a first correction coefficient based on the actual oxygen concentration and the standard oxygen concentration; the first correction coefficient is generated by calculation in advance based on the original engine smoke degree of an air intake system of the engine in various air leakage states;
the second determining unit is used for determining a second correction coefficient according to the actual circulating fuel oil injection quantity and the standard circulating fuel oil injection quantity; the second correction model is generated by calculation in advance based on the original engine smoke intensity of a fuel system of the engine in various fuel injection deviation states;
and the correcting unit is used for correcting the original carbon load model according to the first correction coefficient and the second correction coefficient to obtain a target carbon load model.
9. A computer readable storage medium having computer program instructions stored therein which, when executed, implement the carbon load model modification method of any one of claims 1-7.
10. An electronic device, characterized in that the electronic device comprises: a memory and at least one processor;
the memory having instructions stored therein;
the at least one processor invokes instructions in the memory to cause the electronic device to implement the carbon load model amendment method of any one of claims 1-7.
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