CN112395710B - Correction method and device for carbon loading model - Google Patents
Correction method and device for carbon loading model Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 163
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 163
- 238000012937 correction Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000008929 regeneration Effects 0.000 claims abstract description 100
- 238000011069 regeneration method Methods 0.000 claims abstract description 100
- 239000004071 soot Substances 0.000 claims abstract description 75
- 230000001052 transient effect Effects 0.000 claims abstract description 68
- 238000012545 processing Methods 0.000 claims abstract description 49
- 238000004364 calculation method Methods 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims abstract description 30
- 239000007924 injection Substances 0.000 claims abstract description 30
- 230000008030 elimination Effects 0.000 claims abstract description 23
- 238000003379 elimination reaction Methods 0.000 claims abstract description 23
- 238000009825 accumulation Methods 0.000 claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000000446 fuel Substances 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 6
- 239000013618 particulate matter Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The application provides a method and a device for correcting a DPF carbon load model, which are used for correcting a steady-state soot model, correcting a transient soot model and correcting a passive regeneration model by acquiring a current rotating speed, a current oil injection quantity and a current humidity value to obtain a carbon load model after steady-state correction, a DPF carbon load model after transient correction and a soot elimination quantity after passive regeneration correction under the current humidity; performing product processing on the steady-state corrected DPF carbon loading model and the transient corrected DPF carbon loading model to obtain the accumulated quantity of the corrected carbon smoke model; and subtracting the corrected soot elimination amount by the passive regeneration from the corrected soot model accumulation amount to obtain a corrected total soot accumulation amount. The application solves the problem of inaccurate accuracy of the carbon loading model under the high-humidity environment condition based on the current environment humidity, realizes accurate calculation of the carbon loading, and timely triggers regeneration, thereby avoiding burning out during DPF regeneration and improving user satisfaction.
Description
Technical Field
The application belongs to the technical field of diesel engine temperature control, and particularly relates to a method and a device for correcting a carbon loading model.
Background
The DPF (Diesel Particulate Filter ) is a necessary aftertreatment device for diesel engines to meet emission regulation requirements. The DPF traps PM (Particulate Matter ) in the exhaust gas of the diesel engine by means of physical filtration, and reduces PM emission of the diesel engine. As particulate matter builds up in the DPF channels, the pressure drop across the DPF becomes greater, which increases the exhaust back pressure of the engine, worsens the fuel consumption of the engine, and in severe cases may even directly plug the exhaust pipe, resulting in engine damage. Therefore, during the use of the DPF, it is generally necessary to periodically perform a regeneration operation on the DPF to oxidize and remove soot accumulated in the DPF, so that the flow resistance of the DPF is controlled within a reasonable range, and the normal operation of the engine and the DPF is ensured.
At present, as shown in the schematic diagram of the regeneration structure of the engine DPF in fig. 1, in the process of active regeneration control of the DPF, the influence of humidity on the emission of the diesel engine mainly includes: the heat effect is that the heat capacity of the air inlet component is increased through the introduction of water molecules, the higher heat capacity value can absorb more heat under the condition of certain temperature rise, the combustion temperature can be reduced when the heat release amount of fuel is fixed, and the thermal NO is reduced X Is generated; the dilution effect is mainly that the increase of water in the intake air dilutes the oxygen ratio, so that the mass fraction of oxygen is reduced, and NO is inhibited X But promotes the generation of soot. As shown in FIG. 2, the effect of humidity on diesel emissions, humidity on NO X Emission impact, substantially linear; in the normal humidity range, the boot change is not large, but when the humidity rises to a certain extent, the boot emission increases exponentially. Therefore, under high humidity environment conditions, the carbon loading cannot be accurately calculated, so that the actual carbon loading is higher than the set carbon loading during regeneration, and a large amount of heat is generated during regeneration, so that the DPF is burnt out, and the user satisfaction is reduced.
Disclosure of Invention
The application provides a correction method and device of a carbon loading model, which are used for solving the problem of inaccurate accuracy of the carbon loading model under the high-humidity environment condition, realizing accurate calculation of the carbon loading, triggering regeneration at proper time, avoiding burning out during DPF regeneration and improving user satisfaction.
In order to achieve the above object, the present application provides the following technical solutions:
a method of modifying a carbon loading model, comprising:
acquiring a current rotating speed, a current oil injection quantity and a current humidity value;
correcting a steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a steady-state corrected carbon load model under the current humidity;
correcting the transient soot model according to the current humidity value to obtain a DPF carbon load model subjected to transient correction under the current humidity;
correcting the passive regeneration model according to the current humidity value to obtain the corrected soot elimination amount after passive regeneration under the current humidity;
performing product processing on the steady-state corrected DPF carbon loading model and the transient corrected DPF carbon loading model to obtain the accumulated quantity of the corrected carbon smoke model;
and subtracting the passive regeneration corrected soot elimination amount from the corrected soot model accumulation amount to obtain a corrected total soot accumulation amount.
Preferably, the correcting of the steady-state soot model is performed according to the current rotation speed, the current fuel injection quantity and the current humidity value, so as to obtain a steady-state corrected carbon load model under the current humidity, which specifically includes:
inquiring a steady-state correction MAP according to the current rotating speed and the current fuel injection quantity, and determining a steady-state correction value under the current humidity;
inquiring a steady-state model correction coefficient table according to the current humidity value, and determining a steady-state model correction coefficient under the current humidity;
performing product calculation on the steady-state correction value and the steady-state model correction coefficient to obtain a corrected steady-state value under the current humidity;
and calling a steady-state carbon load model, and inputting the corrected steady-state value into the steady-state carbon load model to obtain a steady-state corrected carbon load model under the current humidity.
Preferably, the correcting of the transient soot model is performed according to the current humidity value, so as to obtain a DPF carbon load model after transient correction under the current humidity, which specifically includes:
acquiring the current humidity value, and calculating the dryness according to a preset calculation formulaAir partial pressure, O is determined according to the dry air partial pressure 2 The content is as follows; the preset calculation formula is as follows:wherein d is the air moisture content, kg (water vapor)/kg (dry air); p-total air pressure; pa is the partial pressure of dry air; pv is the partial pressure of water vapor; />P＝P v +P a ；
According to the current humidity value and the O 2 Determining a transient carbon loading model under the current humidity;
inquiring a transient model correction coefficient table according to the current humidity value, and determining a transient model correction coefficient under the current humidity;
and performing product calculation on the transient carbon loading model and the steady-state model correction coefficient to obtain the corrected DPF carbon loading model under the current humidity.
Preferably, the correcting of the passive regeneration model is performed according to the current humidity value to obtain the soot elimination amount after the passive regeneration correction under the current humidity, specifically:
inquiring a passive regeneration correction coefficient table according to the current humidity value, and determining a passive regeneration correction coefficient under the current humidity;
and calling a passive regeneration model, and inputting the passive regeneration correction coefficient into the passive regeneration model to obtain the amount of the eliminated carbon smoke after the passive regeneration correction under the current humidity.
A device for modifying a carbon loading model, comprising:
the first processing unit is used for acquiring the current rotating speed, the current oil injection quantity and the current humidity value;
the second processing unit is used for correcting the steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a steady-state corrected carbon load model under the current humidity;
the third processing unit is used for correcting the transient soot model according to the current humidity value to obtain a DPF carbon load model subjected to transient correction under the current humidity;
the fourth processing unit is used for correcting the passive regeneration model according to the current humidity value to obtain the elimination amount of the carbon smoke after the passive regeneration correction under the current humidity;
a fifth processing unit, configured to perform product processing on the steady-state corrected DPF carbon loading model and the transient-state corrected DPF carbon loading model, to obtain an accumulated amount of corrected soot models;
and a sixth processing unit, configured to subtract the passively regenerated modified soot elimination amount from the modified soot model accumulation amount to obtain a modified total soot accumulation amount.
Preferably, the second processing unit is specifically configured to:
inquiring a steady-state correction MAP according to the current rotating speed and the current fuel injection quantity, and determining a steady-state correction value under the current humidity;
inquiring a steady-state model correction coefficient table according to the current humidity value, and determining a steady-state model correction coefficient under the current humidity;
performing product calculation on the steady-state correction value and the steady-state model correction coefficient to obtain a corrected steady-state value under the current humidity;
and calling a steady-state carbon load model, and inputting the corrected steady-state value into the steady-state carbon load model to obtain a steady-state corrected carbon load model under the current humidity.
Preferably, the third processing unit is specifically configured to:
acquiring the current humidity value, calculating dry air partial pressure according to a preset calculation formula, and determining O according to the dry air partial pressure 2 The content is as follows; the preset calculation formula is as follows:wherein d is the air moisture content, kg (water vapor)/kg (dry air); p-total air pressure; pa is the partial pressure of dry air; pv is the partial pressure of water vapor; />P＝P v +P a ；
According to the current humidity value and the O 2 Determining a transient carbon loading model under the current humidity;
inquiring a transient model correction coefficient table according to the current humidity value, and determining a transient model correction coefficient under the current humidity;
and performing product calculation on the transient carbon loading model and the steady-state model correction coefficient to obtain the corrected DPF carbon loading model under the current humidity.
Preferably, the fourth processing unit is specifically configured to:
inquiring a passive regeneration correction coefficient table according to the current humidity value, and determining a passive regeneration correction coefficient under the current humidity;
and calling a passive regeneration model, and inputting the passive regeneration correction coefficient into the passive regeneration model to obtain the amount of the eliminated carbon smoke after the passive regeneration correction under the current humidity.
A storage medium comprising a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform a method of modifying a carbon loading model as described above.
An electronic device comprising at least one processor, and at least one memory, bus connected to the processor; the processor and the memory complete communication with each other through the bus; the processor is configured to invoke the program instructions in the memory to perform the method of modifying the carbon loading model as described above.
According to the correction method and device of the carbon load model, the current rotating speed, the current oil injection quantity and the current humidity value are obtained; correcting a steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a steady-state corrected carbon load model under the current humidity; correcting the transient soot model according to the current humidity value to obtain a DPF carbon load model subjected to transient correction under the current humidity; correcting the passive regeneration model according to the current humidity value to obtain the corrected soot elimination amount after passive regeneration under the current humidity; performing product processing on the steady-state corrected DPF carbon loading model and the transient corrected DPF carbon loading model to obtain the accumulated quantity of the corrected carbon smoke model; and subtracting the passive regeneration corrected soot elimination amount from the corrected soot model accumulation amount to obtain a corrected total soot accumulation amount. The application realizes the correction of the carbon loading model from three parts of steady-state carbon loading model correction, transient carbon loading model correction and passive regeneration model correction based on the current environmental humidity, solves the problem of inaccurate accuracy of the carbon loading model under the high-humidity environmental condition, realizes accurate calculation of the carbon loading, and timely triggers regeneration, thereby avoiding burning out during DPF regeneration and improving user satisfaction.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art engine DPF regeneration architecture;
FIG. 2 is a schematic diagram of the relationship between intake air humidity and diesel engine emissions in the prior art;
FIG. 3 is a flowchart of a method for modifying a carbon loading model according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a device for correcting a carbon loading model according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The application provides a method and a device for correcting a carbon loading model, wherein a humidity sensor is added behind an air filter for samplingAnd collecting an air inlet humidity signal for correcting the carbon loading model. When the ambient humidity changes, the dry air pressure changes with the change, O 2 The content also changes, and the in-cylinder combustion process changes accordingly, so that the carbon loading model in the standard environment cannot adapt to the environment with high humidity, and the carbon loading model needs to be corrected, and the correction of the carbon loading model is mainly divided into three parts: steady state carbon loading model correction, transient carbon loading model correction and passive regeneration model correction.
The application aims at: the method solves the problem of inaccurate accuracy of the carbon loading model under the high-humidity environment condition, realizes accurate calculation of the carbon loading, timely triggers regeneration, avoids burning out during DPF regeneration, and improves user satisfaction.
The correction method and the correction device for the carbon loading model can be used for full-series six/six-ohm diesel engine products, have significance for improving the carbon loading precision and the DPF service life, can realize accurate calculation of the carbon loading only by combining a humidity sensor with the diesel engine carbon loading model, and are simple to control and easy to realize.
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 3, an embodiment of the present application provides a flowchart of a method for correcting a carbon loading model, where the method is used for preventing a particulate matter trap from being burned out due to an excessive temperature during regeneration, and specifically includes the following steps:
s301: and acquiring the current rotating speed, the current oil injection quantity and the current humidity value.
S302: and correcting the steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a steady-state corrected carbon load model under the current humidity.
Further, the correcting of the steady-state soot model is performed according to the current rotation speed, the current oil injection quantity and the current humidity value, so as to obtain a carbon load model after steady-state correction under the current humidity, which specifically comprises:
inquiring a steady-state correction MAP according to the current rotating speed and the current fuel injection quantity, and determining a steady-state correction value under the current humidity;
inquiring a steady-state model correction coefficient table according to the current humidity value, and determining a steady-state model correction coefficient under the current humidity;
performing product calculation on the steady-state correction value and the steady-state model correction coefficient to obtain a corrected steady-state value under the current humidity;
and calling a steady-state carbon load model, and inputting the corrected steady-state value into the steady-state carbon load model to obtain a steady-state corrected carbon load model under the current humidity.
S303: and correcting the transient soot model according to the current humidity value to obtain a DPF carbon load model subjected to transient correction under the current humidity.
Further, the correcting of the transient soot model is performed according to the current humidity value, so as to obtain a DPF carbon load model after transient correction under the current humidity, which specifically includes:
acquiring the current humidity value, calculating dry air partial pressure according to a preset calculation formula, and determining O according to the dry air partial pressure 2 The content is as follows; the preset calculation formula is as follows:wherein d is the air moisture content, kg (water vapor)/kg (dry air); p-total air pressure; pa is the partial pressure of dry air; pv is the partial pressure of water vapor; />P＝P v +P a ；
According to the current humidity value and the O 2 Determining a transient carbon loading model under the current humidity;
inquiring a transient model correction coefficient table according to the current humidity value, and determining a transient model correction coefficient under the current humidity;
and performing product calculation on the transient carbon loading model and the steady-state model correction coefficient to obtain the corrected DPF carbon loading model under the current humidity.
S304: and correcting the passive regeneration model according to the current humidity value to obtain the corrected soot elimination amount by passive regeneration under the current humidity.
Further, the correcting of the passive regeneration model is performed according to the current humidity value to obtain the amount of soot elimination after the passive regeneration correction under the current humidity, specifically:
inquiring a passive regeneration correction coefficient table according to the current humidity value, and determining a passive regeneration correction coefficient under the current humidity;
and calling a passive regeneration model, and inputting the passive regeneration correction coefficient into the passive regeneration model to obtain the amount of the eliminated carbon smoke after the passive regeneration correction under the current humidity.
S305: performing product processing on the steady-state corrected DPF carbon loading model and the transient corrected DPF carbon loading model to obtain the accumulated quantity of the corrected carbon smoke model;
s306: and subtracting the passive regeneration corrected soot elimination amount from the corrected soot model accumulation amount to obtain a corrected total soot accumulation amount.
According to the correction method of the carbon load model, the current rotating speed, the current oil injection quantity and the current humidity value are obtained; correcting a steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a steady-state corrected carbon load model under the current humidity; correcting the transient soot model according to the current humidity value to obtain a DPF carbon load model subjected to transient correction under the current humidity; correcting the passive regeneration model according to the current humidity value to obtain the corrected soot elimination amount after passive regeneration under the current humidity; performing product processing on the steady-state corrected DPF carbon loading model and the transient corrected DPF carbon loading model to obtain the accumulated quantity of the corrected carbon smoke model; and subtracting the passive regeneration corrected soot elimination amount from the corrected soot model accumulation amount to obtain a corrected total soot accumulation amount. The application realizes the correction of the carbon loading model from three parts of steady-state carbon loading model correction, transient carbon loading model correction and passive regeneration model correction based on the current environmental humidity, solves the problem of inaccurate accuracy of the carbon loading model under the high-humidity environmental condition, realizes accurate calculation of the carbon loading, and timely triggers regeneration, thereby avoiding burning out during DPF regeneration and improving user satisfaction.
Referring to fig. 4, based on the method for correcting a carbon loading model disclosed in the above embodiment, the present embodiment correspondingly discloses a device for correcting a carbon loading model, where the device is used for preventing the particulate matter trap from being burnt due to too high temperature during regeneration, and specifically includes: a first processing unit 401, a second processing unit 402, a third processing unit 403, a fourth processing unit 404, a fifth processing unit 405, and a sixth processing unit 406, wherein:
a first processing unit 401, configured to obtain a current rotation speed, a current fuel injection amount, and a current humidity value;
the second processing unit 402 is configured to perform correction of the steady-state soot model according to the current rotation speed, the current fuel injection amount, and the current humidity value, so as to obtain a steady-state corrected carbon load model under the current humidity;
a third processing unit 403, configured to perform modification of the transient soot model according to the current humidity value, so as to obtain a DPF carbon load model after transient modification under the current humidity;
a fourth processing unit 404, configured to perform modification of the passive regeneration model according to the current humidity value, so as to obtain a soot elimination amount after passive regeneration modification under the current humidity;
a fifth processing unit 405, configured to perform product processing on the steady-state corrected DPF carbon loading model and the transient-state corrected DPF carbon loading model, to obtain an accumulated amount of corrected soot models;
and a sixth processing unit 406, configured to subtract the passively regenerated modified soot elimination amount from the modified soot model accumulation amount to obtain a modified total soot accumulation amount.
Further, the second processing unit 402 is specifically configured to:
inquiring a steady-state correction MAP according to the current rotating speed and the current fuel injection quantity, and determining a steady-state correction value under the current humidity;
inquiring a steady-state model correction coefficient table according to the current humidity value, and determining a steady-state model correction coefficient under the current humidity;
performing product calculation on the steady-state correction value and the steady-state model correction coefficient to obtain a corrected steady-state value under the current humidity;
and calling a steady-state carbon load model, and inputting the corrected steady-state value into the steady-state carbon load model to obtain a steady-state corrected carbon load model under the current humidity.
Further, the third processing unit 403 is specifically configured to:
acquiring the current humidity value, calculating dry air partial pressure according to a preset calculation formula, and determining O according to the dry air partial pressure 2 The content is as follows; the preset calculation formula is as follows:wherein d is the air moisture content, kg (water vapor)/kg (dry air); p-total air pressure; pa is the partial pressure of dry air; pv is the partial pressure of water vapor; />P＝P v +P a ；
According to the current humidity value and the O 2 Determining a transient carbon loading model under the current humidity;
inquiring a transient model correction coefficient table according to the current humidity value, and determining a transient model correction coefficient under the current humidity;
and performing product calculation on the transient carbon loading model and the steady-state model correction coefficient to obtain the corrected DPF carbon loading model under the current humidity.
Further, the fourth processing unit 404 is specifically configured to:
inquiring a passive regeneration correction coefficient table according to the current humidity value, and determining a passive regeneration correction coefficient under the current humidity;
and calling a passive regeneration model, and inputting the passive regeneration correction coefficient into the passive regeneration model to obtain the amount of the eliminated carbon smoke after the passive regeneration correction under the current humidity.
The correction device of the carbon loading model comprises a processor and a memory, wherein the first processing unit, the second processing unit, the third processing unit and the like are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The inner core can be provided with one or more than one core to solve the problem of inaccurate accuracy of the carbon loading model under the high-humidity environment condition, realize accurate calculation of the carbon loading, trigger regeneration in good time, avoid burning out during DPF regeneration, and improve user satisfaction.
The embodiment of the application provides a storage medium, wherein a program is stored on the storage medium, and the program is executed by a processor to realize the correction method of the carbon loading model.
The embodiment of the application provides a processor which is used for running a program, wherein the correction method of the carbon loading model is executed when the program runs.
An embodiment of the present application provides an electronic device, as shown in fig. 3, where the electronic device 30 includes at least one processor 301, and at least one memory 302 and a bus 303 connected to the processor; wherein, the processor 301 and the memory 302 complete communication with each other through the bus 303; the processor 301 is configured to call the program instructions in the memory 302 to execute the above-mentioned method for modifying the carbon loading model.
The electronic device herein may be a server, a PC, a PAD, a mobile phone, etc.
The application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with the method steps of:
acquiring a current rotating speed, a current oil injection quantity and a current humidity value;
correcting a steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a steady-state corrected carbon load model under the current humidity;
correcting the transient soot model according to the current humidity value to obtain a DPF carbon load model subjected to transient correction under the current humidity;
correcting the passive regeneration model according to the current humidity value to obtain the corrected soot elimination amount after passive regeneration under the current humidity;
performing product processing on the steady-state corrected DPF carbon loading model and the transient corrected DPF carbon loading model to obtain the accumulated quantity of the corrected carbon smoke model;
and subtracting the passive regeneration corrected soot elimination amount from the corrected soot model accumulation amount to obtain a corrected total soot accumulation amount.
Further, the correcting of the steady-state soot model is performed according to the current rotation speed, the current oil injection quantity and the current humidity value, and a carbon load model after steady-state correction under the current humidity is obtained, specifically:
inquiring a steady-state correction MAP according to the current rotating speed and the current fuel injection quantity, and determining a steady-state correction value under the current humidity;
inquiring a steady-state model correction coefficient table according to the current humidity value, and determining a steady-state model correction coefficient under the current humidity;
performing product calculation on the steady-state correction value and the steady-state model correction coefficient to obtain a corrected steady-state value under the current humidity;
and calling a steady-state carbon load model, and inputting the corrected steady-state value into the steady-state carbon load model to obtain a steady-state corrected carbon load model under the current humidity.
Further, the correcting of the transient soot model is performed according to the current humidity value, and a DPF carbon load model after transient correction under the current humidity is obtained, specifically:
acquiring the current humidity value, calculating dry air partial pressure according to a preset calculation formula, and determining O according to the dry air partial pressure 2 The content is as follows; the preset calculation formula is as follows:wherein d is the air moisture content, kg (water vapor)/kg (dry air); p-total air pressure; pa is the partial pressure of dry air; pv is the partial pressure of water vapor; />P＝P v +P a ；
According to the current humidity value and the O 2 Determining a transient carbon loading model under the current humidity;
inquiring a transient model correction coefficient table according to the current humidity value, and determining a transient model correction coefficient under the current humidity;
and performing product calculation on the transient carbon loading model and the steady-state model correction coefficient to obtain the corrected DPF carbon loading model under the current humidity.
Further, the modification of the passive regeneration model is performed according to the current humidity value, so as to obtain the soot elimination amount after the passive regeneration modification under the current humidity, which is specifically as follows:
inquiring a passive regeneration correction coefficient table according to the current humidity value, and determining a passive regeneration correction coefficient under the current humidity;
and calling a passive regeneration model, and inputting the passive regeneration correction coefficient into the passive regeneration model to obtain the amount of the eliminated carbon smoke after the passive regeneration correction under the current humidity.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a 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.
In one typical configuration, the device includes one or more processors (CPUs), memory, and a bus. The device may also include input/output interfaces, network interfaces, and the like.
The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip. Memory is an example of a computer-readable medium.
Computer readable media, 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 storage media for a computer 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, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
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 one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (8)
1. A method for modifying a carbon loading model, comprising:
acquiring a current rotating speed, a current oil injection quantity and a current humidity value;
correcting a steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a DPF carbon load model after steady-state correction under the current humidity;
correcting the transient soot model according to the current humidity value to obtain a DPF carbon load model subjected to transient correction under the current humidity;
correcting the passive regeneration model according to the current humidity value to obtain the corrected soot elimination amount after passive regeneration under the current humidity;
performing product processing on the steady-state corrected DPF carbon loading model and the transient corrected DPF carbon loading model to obtain the accumulated quantity of the corrected carbon smoke model;
subtracting the passive regeneration corrected soot elimination amount from the corrected soot model accumulation amount to obtain a corrected total soot accumulation amount;
and correcting the steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a DPF carbon load model subjected to steady-state correction under the current humidity, wherein the DPF carbon load model specifically comprises the following components:
inquiring a steady-state correction MAP according to the current rotating speed and the current fuel injection quantity, and determining a steady-state correction value under the current humidity;
inquiring a steady-state model correction coefficient table according to the current humidity value, and determining a steady-state model correction coefficient under the current humidity;
performing product calculation on the steady-state correction value and the steady-state model correction coefficient to obtain a corrected steady-state value under the current humidity;
and calling a steady-state carbon loading model, and inputting the corrected steady-state value into the steady-state carbon loading model to obtain a DPF carbon loading model subjected to steady-state correction under the current humidity.
2. The method according to claim 1, wherein the correcting of the transient soot model according to the current humidity value obtains a DPF carbon loading model after transient correction under the current humidity, specifically:
acquiring the current humidity value, calculating dry air partial pressure according to a preset calculation formula, and determining O according to the dry air partial pressure 2 The content is as follows; the preset calculation formula is as follows:wherein d is the air moisture content, which is obtained by dividing the mass of water vapor by the mass of dry air, wherein the units of water vapor and dry air are kilograms; p-total air pressure; pa is the partial pressure of dry air; pv is the partial pressure of water vapor；/>P＝P v +P a ；
According to the current humidity value and the O 2 Determining a transient carbon loading model under the current humidity;
inquiring a transient model correction coefficient table according to the current humidity value, and determining a transient model correction coefficient under the current humidity;
and performing product calculation on the transient carbon loading model and the transient model correction coefficient to obtain the corrected DPF carbon loading model under the current humidity.
3. The method according to claim 1, wherein the modifying of the passive regeneration model according to the current humidity value obtains a passive regeneration modified soot abatement amount at the current humidity, specifically:
inquiring a passive regeneration correction coefficient table according to the current humidity value, and determining a passive regeneration correction coefficient under the current humidity;
and calling a passive regeneration model, and inputting the passive regeneration correction coefficient into the passive regeneration model to obtain the amount of the eliminated carbon smoke after the passive regeneration correction under the current humidity.
4. A correction device for a carbon loading model, comprising:
the first processing unit is used for acquiring the current rotating speed, the current oil injection quantity and the current humidity value;
the second processing unit is used for correcting the steady-state soot model according to the current rotating speed, the current oil injection quantity and the current humidity value to obtain a DPF carbon load model after steady-state correction under the current humidity;
the third processing unit is used for correcting the transient soot model according to the current humidity value to obtain a DPF carbon load model subjected to transient correction under the current humidity;
the fourth processing unit is used for correcting the passive regeneration model according to the current humidity value to obtain the elimination amount of the carbon smoke after the passive regeneration correction under the current humidity;
a fifth processing unit, configured to perform product processing on the steady-state corrected DPF carbon loading model and the transient-state corrected DPF carbon loading model, to obtain an accumulated amount of corrected soot models;
a sixth processing unit, configured to subtract the passively regenerated modified soot elimination amount from the modified soot model accumulation amount to obtain a modified total soot accumulation amount;
wherein the second processing unit is specifically configured to:
inquiring a steady-state correction MAP according to the current rotating speed and the current fuel injection quantity, and determining a steady-state correction value under the current humidity;
inquiring a steady-state model correction coefficient table according to the current humidity value, and determining a steady-state model correction coefficient under the current humidity;
performing product calculation on the steady-state correction value and the steady-state model correction coefficient to obtain a corrected steady-state value under the current humidity;
and calling a steady-state carbon loading model, and inputting the corrected steady-state value into the steady-state carbon loading model to obtain a DPF carbon loading model subjected to steady-state correction under the current humidity.
5. The apparatus of claim 4, wherein the third processing unit is specifically configured to:
acquiring the current humidity value, calculating dry air partial pressure according to a preset calculation formula, and determining O according to the dry air partial pressure 2 The content is as follows; the preset calculation formula is as follows:wherein d is the air moisture content, which is obtained by dividing the mass of water vapor by the mass of dry air, wherein the units of water vapor and dry air are kilograms; p-total air pressure; pa is the partial pressure of dry air; pv is the partial pressure of water vapor; />P＝P v +P a ；
According to the current humidity value and the O 2 Determining a transient carbon loading model under the current humidity;
inquiring a transient model correction coefficient table according to the current humidity value, and determining a transient model correction coefficient under the current humidity;
and performing product calculation on the transient carbon loading model and the transient model correction coefficient to obtain the corrected DPF carbon loading model under the current humidity.
6. The apparatus according to claim 4, wherein the fourth processing unit is specifically configured to:
inquiring a passive regeneration correction coefficient table according to the current humidity value, and determining a passive regeneration correction coefficient under the current humidity;
and calling a passive regeneration model, and inputting the passive regeneration correction coefficient into the passive regeneration model to obtain the amount of the eliminated carbon smoke after the passive regeneration correction under the current humidity.
7. A storage medium comprising a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform the method of modifying a carbon loading model according to any one of claims 1 to 3.
8. An electronic device comprising at least one processor, and at least one memory, bus coupled to the processor; the processor and the memory complete communication with each other through the bus; the processor is configured to invoke program instructions in the memory to perform the method of modifying a carbon loading model according to any one of claims 1 to 3.
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| CN113074035B (en) * | 2021-05-07 | 2022-07-19 | 潍柴动力股份有限公司 | DPF carbon loading capacity estimation method, device and system |
| CN113806953B (en) * | 2021-09-24 | 2023-11-21 | 一汽解放汽车有限公司 | Construction method of DPF carbon loading model |
| CN113669140B (en) * | 2021-09-30 | 2022-08-23 | 潍柴动力股份有限公司 | DPF active regeneration control method and device, storage medium and vehicle |
| CN114896766B (en) * | 2022-04-20 | 2023-03-24 | 苏州清研博浩汽车科技有限公司 | DPF filtering efficiency calibration method and device and electronic equipment |
| CN115405402B (en) * | 2022-08-29 | 2024-03-19 | 潍柴动力股份有限公司 | Determination method and device of carbon loading model, electronic equipment and storage medium |
| CN115638042B (en) * | 2022-12-23 | 2023-04-18 | 潍柴动力股份有限公司 | Carbon loading model correction method and device, storage medium and electronic equipment |
| CN116122944B (en) * | 2023-04-19 | 2023-07-18 | 潍柴动力股份有限公司 | Engine aftertreatment method and system |
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