CN109488417A - Control method and system for DPF passive regeneration process - Google Patents
Control method and system for DPF passive regeneration process Download PDFInfo
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- CN109488417A CN109488417A CN201910039717.XA CN201910039717A CN109488417A CN 109488417 A CN109488417 A CN 109488417A CN 201910039717 A CN201910039717 A CN 201910039717A CN 109488417 A CN109488417 A CN 109488417A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1606—Particle filter loading or soot amount
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Processes For Solid Components From Exhaust (AREA)
Abstract
The present invention relates to diesel engine post-processing system control field, especially a kind of control method and system for DPF passive regeneration process.Control method for DPF passive regeneration process includes: to calculate engine emission to enter real-time soot mass flow inside DPF；It calculates the passive regeneration occurred in real time inside DPF and reacts consumed soot mass flow；Soot passive regeneration rate is calculated according to the soot mass flow into inside DPF and the soot mass flowmenter consumed；Pass through the soot growth rate in the soot accumulated value and statistical time inside integrating meter calculating DPF according to the soot mass flow into inside DPF and soot passive regeneration rate；Judged according to the soot growth rate in the soot accumulated value and statistical time, if Yao Tiwen demand requires engine switching working mode.Control system for DPF passive regeneration process includes signal input module, original machine exhaust computing module, DOC chemical reaction module, DPF computing module and coordinating control module.
Description
Technical field
The present invention relates to diesel engine post-processing system control field, especially a kind of control for DPF passive regeneration process
Method and system processed.
Background technique
DPF(diesel particulate trap) post-processing technology be soot in Reduction for Diesel Engines low exhaust gas technical way,
Basic principle is the soot captured in the exhaust for flowing through DPF by the wall-flow type physical structure of DPF, to play purification diesel engine
The effect of tail gas.The arresting efficiency of DPF is very high, is generally capable of up to 95% or more.As DPF trapping carbon particle is more and more, need
The irregular carbon carrying capacity by DPF is wanted to remove.
In general, DPF system needs to cooperate DOC(diesel oxidation catalyst) it is used together.The effect of DOC: first is that will
Gaseous pollutant (such as HC, CO) is oxidized to harmless gas in exhaust；Second is that the NO in exhaust is oxidized to NO2, facilitate DPF
Passive regeneration react occur；Third is that oxidation sprays into the diesel oil (main component HC) in exhaust pipe, oxidation heat liberation improves exhaust
Temperature.
Currently, in the after-treatment system that diesel engine uses, it, can be in a part of particle object before DOC is placed on DPF
Dissolved organic matter ingredient oxidizes away, and enters the substantially dry carbon cigarette inside DPF in this way.The moment, there is carbon inside DPF
The process of accumulation and consumption.Process, that is, regenerative process of DPF consumption, (about 200 DEG C ~ 450 at a temperature of diesel engine normal exhaust
DEG C), it is main that passive regeneration reaction, the NO that DOC is generated in passive regeneration reaction process occurs2The carbon particle aoxidized in DPF is raw
At CO2, the reaction equation of the passive regeneration reaction are as follows: 2NO2+C→2NO +CO2.When the soot that passive regeneration reacts away is less than
When the soot of DPF trapping, DPF is at the process of accumulation soot.By after a certain period of time, the soot in DPF can reach saturation
State needs to trigger initiative regeneration.The reaction that initiative regeneration occurs are as follows: O2+C→CO2.Its fast reaction temperature needs to reach 550
DEG C or more.But the delivery temperature of diesel engine is extremely difficult to so high temperature, needs to aoxidize on DOC by additional oil spout and put
Heat improves delivery temperature.
Current DPF control method is only controlled and is judged to DPF initiative regeneration process, the passive regeneration process of DPF
It does not control, leads to the effect that can not give full play of passive regeneration and depend on initiative regeneration unduly, so as to cause actively again
Oil generation consumption increases, and the risk that DPF is burnt out increased dramatically.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of control for DPF passive regeneration process
Method and system monitors the passive regeneration efficiency on DPF, by mentioning by monitoring the chemical reaction process on DOC and DPF
High exhaust temperature and NO2The pro-active intervention means of ratio improve the passive regeneration efficiency of DPF, thus greatly reduce actively again
The raw frequency of hair tonic, or initiative regeneration can be cancelled, that is, remove initiative regeneration injection system, reduces system cost.In addition,
The risk that DPF is burnt when can also reduce DPF initiative regeneration improves the reliability of after-treatment system.
The technical solution provided according to the present invention provides a kind of for DPF passive regeneration as the first aspect of the present invention
The control method of process, the control method for DPF passive regeneration process include:
It calculates engine emission and enters the real-time soot mass flow inside DPF；
It calculates the passive regeneration occurred in real time inside DPF and reacts consumed soot mass flow；
Soot passive regeneration is calculated according to the soot mass flow into inside DPF and the soot mass flowmenter consumed
Rate；
It is calculated inside DPF according to the soot mass flow into inside DPF and soot passive regeneration rate by integrating meter
Soot accumulated value and statistical time in soot growth rate；
Judged according to the soot growth rate in the soot accumulated value and statistical time, if to trigger temperature raising demand or want
Seek engine switching working mode.
Further, calculating the real-time soot mass flow step that engine emission enters inside DPF includes:
Schemed according to soot flow mass M AP under engine speed and Engine Injection Mass inquiry original machine stable state, obtains corresponding stable state
Soot mass flow；
Air-fuel ratio MAP chart is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ, obtains air-fuel ratio λ change rate
To the correction amount of soot；
Correction amount of the air-fuel ratio λ change rate to soot is multiplied with the soot mass flow of the stable state inquired and is calculated
Soot mass flow in real time is discharged into inside DPF to described.
Further, it calculates the passive regeneration occurred in real time inside DPF and reacts consumed soot mass flow step
It also carries out before:
It calculates engine emission and enters real-time NO mass flow and real-time NO inside DOC2Mass flow；
Calculate the real-time NO mass flow at DOC outlet and real-time NO2Mass flow.
Further, it calculates engine emission and enters real-time NO mass flow and real-time NO inside DOC2Quality stream measurer
Body includes:
Schemed according to NO flow mass M AP under engine speed and Engine Injection Mass inquiry original machine stable state, it is steady to obtain corresponding NO
State mass flow；
Air-fuel ratio MAP chart is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ, obtains air-fuel ratio λ change rate
To the correction amount of soot；
Correction amount of the air-fuel ratio λ change rate to soot is added with the NO steady state mass flow inquired, institute is calculated
State the real-time NO mass flow being discharged into inside DOC；
According to NO under engine speed and Engine Injection Mass inquiry original machine stable state2Flow mass M AP figure, obtains corresponding NO2
Steady state mass flow；
Air-fuel ratio MAP chart is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ, obtains air-fuel ratio λ change rate
To the correction amount of soot；
By the air-fuel ratio λ change rate to the correction amount of soot and the NO inquired2The addition of steady state mass flow is calculated
The real-time NO being discharged into inside DOC2Mass flow.
Further, real-time NO mass flow and the real-time NO at DOC outlet are calculated2Mass flow step specifically includes:
DOC carrier is equally divided into several pieces from the inlet to the outlet and is used to be iterated calculating；
Calculate the temperature of every part of DOC carrier；
Calculate the NO mass flow and NO in each part DOC carrier its respective exit after NO oxidation reaction occurs2Mass flow；
It calculates each part DOC carrier and NO oxidation reaction and NO is occurring2The NO mass flow and NO in its respective exit after back reaction2
Mass flow；
NO oxidation reaction and NO will occur2NO mass flow and NO after back reaction at each part DOC carrier outlet2Mass flow
It is iterated calculating, NO mass flow and NO at final output DOC outlet2Mass flow.
Further, it calculates the passive regeneration occurred in real time inside DPF and reacts consumed soot mass flow step
It specifically includes:
The mean temperature inside DPF is calculated according to DPF inlet temperature and exhaust mass flow；
Calculate the NO inside DPF2Mass flow.
Further, it is specifically wrapped according to the mean temperature step that DPF inlet temperature and exhaust mass flow calculate inside DPF
It includes:
According to temperature-exhaust mass flow-NO oxidation rate MAP chart and temperature-exhaust mass flow-NO2Back reaction rate
MAP chart, find respectively and the mean temperature and the corresponding NO oxidation rate of extraction flow and NO inside the DPF2It is converse
Answer rate；
The NO and NO generated further according to the NO mass flow, the DPF passive regeneration that enter from DPF entrance2Mass flow and NO oxygen
Change rate and NO2Back reaction speedometer calculates the NO inside DPF2Mass flow；
According to temperature-extraction flow-passive regeneration reaction rate MAP chart, find and the mean temperature and exhaust stream inside DPF
Measure corresponding passive regeneration reaction rate；
According to the NO inside the passive regeneration reaction rate and the DPF2It is anti-that mass flowmenter calculates passive regeneration inside DPF
The soot mass flow that should be consumed；Soot passive regeneration rate is calculated according to the soot mass flowmenter consumed.
Further, it is rung according to the engine of the soot growth rate starting response in the soot accumulated value and statistical time
Answer mode specifically includes the following steps:
If average exhaust is less than limit value within a certain period of time, judge between the soot accumulated value and carbon carrying capacity value
Relationship between relationship and soot growth rate and 0；
If carbon accumulation value < carbon carrying capacity value, and soot growth rate < 0, then maintaining engine mode one constant；
If carbon accumulation value < carbon carrying capacity value, but soot growth rate > 0, then proposing that entering engine mode two requests, so as to the greatest extent
It is fast to promote delivery temperature, to improve passive regeneration efficiency, reduce soot growth rate；
If carbon accumulation value >=carbon carrying capacity value, but soot growth rate≤0, then proposing that entering engine mode two requests, so as to the greatest extent
It is fast to promote delivery temperature, to improve passive regeneration efficiency, reduce soot growth rate；
If carbon accumulation value >=carbon carrying capacity value, but soot growth rate > 0, then propose that entering engine mode three requests, the row of raising
The discharge that original machine soot value is reduced while temperature is spent, further speeds up passive regeneration efficiency, to quickly make the soot in DPF
It reduces, maintains equilibrium state.
As a second aspect of the invention, a kind of control system for DPF passive regeneration process is provided, it is described to be used for
The control system of DPF passive regeneration process includes:
Signal input module, the signal input module are used to engine and aftertreatment sensors coherent signal inputing to original machine
It is vented computing module, DOC chemical reaction module, DPF computing module and coordinating control module；
Original machine is vented computing module, and original machine exhaust computing module can calculate engine emission and enter soot inside DPF
Mass flow and the NO mass flow being discharged into inside DOC and NO2Mass flow；
DOC chemically reacts module, and NO oxidation reaction and NO occurs in the DOC chemical reaction module2Back reaction, and calculate DOC
The NO mass flow and NO in exit2Mass flow；
Passive regeneration reaction occurs in the DPF computing module for DPF computing module, and can calculate and occur in real time inside DPF
Passive regeneration reacts consumed soot mass flow；
Coordinating control module, the coordinating control module be used for according in DPF soot cumulant and soot change rate judged,
Whether to trigger temperature raising demand or require engine switching working mode.
Further, the DOC chemical reaction module specifically includes:
DOC temperature field model module, the DOC temperature field model module are used for real according to DOC inlet real time temperature and engine
When exhaust mass flow calculate the temperature of every part of DOC carrier, and the temperature information of every part of DOC carrier is sent to NO oxidation reaction
Computing module and NO2Back reaction computing module；
For calculating each part DOC carrier NO oxidation is occurring for NO oxidation reaction computing module, the NO oxidation reaction computing module
The NO mass flow and NO in its respective exit after reaction2Mass flow, and by the NO mass flow and NO2Mass flow letter
Breath is conveyed to NO2Back reaction computing module；
NO2Back reaction computing module, the NO2Back reaction computing module is according to the NO in its respective exit after NO oxidation reaction
Mass flow and NO2Mass flow information computing module transmission for calculate each part DOC carrier occur NO oxidation reaction and
NO2The NO mass flow and NO in its respective exit after back reaction2Mass flow；
Module is iterated to calculate, the iterative calculation module will be for that will occur NO oxidation reaction and NO2Each part DOC is carried after back reaction
The NO mass flow and NO in body exit2Mass flow is iterated calculating, the NO mass flow at final output DOC outlet and
NO2Mass flow.
Taproot logic of the invention is according to engine relevant information, and the chemistry calculated inside DOC and DPF in real time is anti-
Process is answered, judges carbon loading levels and passive regeneration rate inside DPF.Pass through the passive regeneration chemistry in pro-active intervention DPF
Reaction process, so that the passive regeneration efficiency in DPF is maximumlly improved, to realize in the after-treatment system of installation DPF
Initiative regeneration oil spout measure is not needed, it can guarantee the soot in DPF always without departing from carbon carrying capacity limit value.To in Hou Chu
When reason system designs, so that it may remove DPF initiative regeneration injection system, reduce system initial cost.Due to not needing actively again
It is raw, oil consumption can be reduced, the use cost of user is reduced.
It can be seen that the control method and system provided by the present invention for DPF passive regeneration process from the above, with
The prior art, which is compared, has following advantages:
First, the adjusting passive regeneration rate of maximization realizes the Carbon balance inside DPF, greatly reduces initiative regeneration and cause height
The risk of warm scaling loss DPF；
Second, not using initiative regeneration, reclaimed oil consumption can be made to be reduced to 0, reduce customer using cost；
Third, can reduce the risk of oil dilution due to not needing oil spout regeneration, improve the reliability of engine.
Detailed description of the invention
Fig. 1 is the flow chart of first aspect present invention.
Fig. 2 is first aspect present invention S100 specific flow chart.
Fig. 3 is the step of also carrying out before S200 in first aspect present invention.
Fig. 4 is the specific flow chart of S110 in first aspect present invention.
Fig. 5 is the specific flow chart of S120 in first aspect present invention.
Fig. 6 is the specific flow chart of S200 in first aspect present invention.
Fig. 7 is the specific flow chart of S500 in first aspect present invention.
The calculating logic figure of S100 in Fig. 8 first aspect present invention.
Fig. 9 is the calculating logic figure of S110 in first aspect present invention.
Figure 10 is the structural schematic diagram of second aspect of the present invention.
Figure 11 is the structural schematic diagram that DOC chemically reacts module in second aspect of the present invention.
Figure 12 is the structural schematic diagram of DPF computing module in second aspect of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
As the first aspect of the present invention, as shown in Figure 1, providing a kind of control method for DPF passive regeneration process
The following steps are included:
S100: it calculates engine emission and enters the real-time soot mass flow inside DPF；
S200: it calculates the passive regeneration occurred in real time inside DPF and reacts consumed soot mass flow；
S300: soot quilt is calculated according to the soot mass flow into inside DPF and the soot mass flowmenter consumed
Dynamic regeneration rate；
S400: DPF is calculated by integrating meter according to the soot mass flow into inside DPF and soot passive regeneration rate
Soot growth rate in internal soot accumulated value and statistical time；
S500: judged according to the soot growth rate in the soot accumulated value and statistical time, if to trigger temperature raising needs
Seek or require engine switching working mode.
Specifically, as shown in Fig. 2, the S100: calculating engine emission and enter the real-time soot mass flow inside DPF
Step includes: S101: being schemed according to soot flow mass M AP under engine speed and Engine Injection Mass inquiry original machine stable state, is obtained
To the soot mass flow of corresponding stable state；S102: it is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ empty
Combustion obtains air-fuel ratio λ change rate to the correction amount of soot than MAP chart；S103: the air-fuel ratio λ change rate repairs soot
Positive quantity, which is multiplied to be calculated with the soot mass flow of the stable state inquired, described is discharged into inside DPF soot quality in real time
Flow；
As shown in figure 3, in the S200: calculating the passive regeneration occurred in real time inside DPF and react consumed soot quality
It is also carried out before flow rate steps:
S110: it calculates engine emission and enters real-time NO mass flow and real-time NO inside DOC2Mass flow；
S120: the real-time NO mass flow at DOC outlet and real-time NO are calculated2Mass flow；
Specifically, as shown in figure 4, the S110: calculating engine emission and enter real-time NO mass flow inside DOC and in real time
NO2The real-time NO mass flow that calculating engine emission in mass flow step enters inside DOC specifically includes: S111: root
Scheme according to NO flow mass M AP under engine speed and Engine Injection Mass inquiry original machine stable state, obtains corresponding NO steady state mass
Flow；S112: air-fuel ratio MAP chart is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ, obtains air-fuel ratio λ
Correction amount of the change rate to soot；S113: by the air-fuel ratio λ change rate to the correction amount of soot and the NO stable state inquired
Mass flow, which is added, is calculated the real-time NO mass flow being discharged into inside DOC；
Specifically, as shown in figure 4, the S110: calculating engine emission and enter real-time NO mass flow inside DOC and in real time
NO2Calculating engine emission in mass flow step enters the real-time NO inside DOC2Mass flow specifically includes: S114: root
According to NO under engine speed and Engine Injection Mass inquiry original machine stable state2Flow mass M AP figure, obtains corresponding NO2Steady state mass
Flow；S115: air-fuel ratio MAP chart is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ, obtains air-fuel ratio λ
Correction amount of the change rate to soot；S116: by the air-fuel ratio λ change rate to the correction amount of soot and the NO inquired2Surely
State mass flow, which is added, is calculated the real-time NO being discharged into inside DOC2Mass flow；
Due to redox reaction can occur in DOC so that between the outlet and entrance of DOC formation temperature change, in order to
So that NO mass flow and NO at DOC outlet2The calculating of mass flow is more accurate, as shown in figure 5, the S120: calculating
NO mass flow and NO at DOC outlet2Mass flow step specifically:
S121: DOC carrier is equally divided into several pieces from the inlet to the outlet and is used to be iterated calculating；
S122: the temperature of every part of DOC carrier is calculated；According to engine real-time ventilation mass flow and corresponding inquiry exhaust-temperature
MAP chart, obtain the corresponding exhaust gas heat of exhaust mass flow；According to the real time temperature and DOC carrier of DOC inlet and outlet
Quality and DOC carrier specific heat capacity, the heat for calculating DOC carrier absorption or shedding；According to the exhaust gas heat, DOC carrier
The temperature of heat and DOC inlet for absorbing or shedding, calculates the temperature of every part of carrier.
S123: the NO mass flow and NO in each part DOC carrier its respective exit after NO oxidation reaction occurs are calculated2Matter
Measure flow；Temperature-exhaust mass flow-NO oxidation rate MAP chart is inquired, is obtained real with the temperature of each part carrier and engine
When the corresponding NO oxidation rate of exhaust mass flow, entered inside DOC according to the NO oxidation rate and engine emission
NO mass flow and NO2Mass flow calculates the NO quality stream after NO oxidation reaction only occurs at each part DOC carrier outlet
Amount and NO2Mass flow；It should be explained that the NO oxidation equation formula are as follows: 2NO+O2→2NO2；
S124: it calculates each part DOC carrier and NO oxidation reaction and NO is occurring2The NO mass flow in its respective exit after back reaction
And NO2Mass flow；Inquire temperature-exhaust mass flow-NO2The MAP chart of back reaction rate obtains the temperature with each part carrier
NO corresponding with engine real-time ventilation mass flow2Back reaction rate, according to NO2Back reaction rate and each part DOC carrier
The NO mass flow and NO in its respective exit after NO oxidation reaction occurs2Mass flow calculates and NO oxidation is occurring instead
Should and NO2NO mass flow and NO after back reaction at each part DOC carrier outlet2Mass flow；It should be explained that the NO2
Back reaction equation are as follows: 2NO2→2NO+O2；
S125: NO oxidation reaction and NO will occur2NO mass flow and NO after back reaction at each part DOC carrier outlet2Matter
Amount flow is iterated calculating, NO mass flow and NO at final output DOC outlet2Mass flow；
It is to be understood that the DOC carrier is equally divided into several pieces from the inlet to the outlet, every part of carrier is calculated separately out
Temperature, and calculate each part DOC carrier and NO oxidation reaction and NO is occurring2The NO mass flow in its respective exit after back reaction
And NO2Mass flow, finally by the NO mass flow and NO at each part DOC carrier outlet2Mass flow is iterated calculating, energy
It enough avoids being merely able to carry out inquiry calculating according to the mean temperature of DOC carrier, so that being looked into because each part DOC bed temperature is different
The NO oxidation rate and NO of inquiry2The problem of back reaction rate and physical presence biggish error, so as to improve at DOC outlet
NO mass flow and NO2The accuracy of mass flow calculation.
The S200: it is specific to calculate the consumed soot mass flow of the passive regeneration reaction occurred in real time inside DPF
The following steps are included: as shown in fig. 6,
S210: the mean temperature inside DPF is calculated according to DPF inlet temperature and exhaust mass flow；
S220: the NO inside DPF is calculated2Mass flow；
Since a certain amount of noble metal catalyst can be coated on general DPF carrier, so following chemistry occurs on DPF catalyst
Reaction: one, 2NO+O2→2NO2；Two, 2NO2→2NO+O2, thus actual NO inside the DPF2Mass flow is greater than from DPF
The NO that entrance enters2Mass flow, in order to enable calculating the NO inside DPF2Mass flow is more accurate, the S220: calculating
NO mass flow and NO inside DPF out2Mass flow；Step specifically includes:
According to temperature-exhaust mass flow-NO oxidation rate MAP chart and temperature-exhaust mass flow-NO2Back reaction rate
MAP chart, find respectively and the mean temperature and the corresponding NO oxidation rate of extraction flow and NO inside the DPF2It is converse
Answer rate；
The NO and NO generated further according to the NO mass flow, the DPF passive regeneration that enter from DPF entrance2Mass flow and NO oxygen
Change rate and NO2Back reaction speedometer calculates the NO inside DPF2Mass flow；
S230: according to temperature-extraction flow-passive regeneration reaction rate MAP chart, find with inside DPF mean temperature and
The corresponding passive regeneration reaction rate of extraction flow；
S240: according to the NO inside the passive regeneration reaction rate and the DPF2Mass flowmenter calculates passive inside DPF
The soot mass flow that regenerative response consumes；Soot passive regeneration speed is calculated according to the soot mass flowmenter consumed
Rate.
As shown in fig. 7, the S500: starting response according to the soot growth rate in the soot accumulated value and statistical time
Engine response mode specifically includes the following steps:
If average exhaust is less than limit value within a certain period of time, judge between the soot accumulated value and carbon carrying capacity value
Relationship between relationship and soot growth rate and 0；
If carbon accumulation value < carbon carrying capacity value, and soot growth rate < 0, then maintaining engine mode one constant；
If carbon accumulation value < carbon carrying capacity value, but soot growth rate > 0, then proposing that entering engine mode two requests, so as to the greatest extent
It is fast to promote delivery temperature, to improve passive regeneration efficiency, reduce soot growth rate；
If carbon accumulation value >=carbon carrying capacity value, but soot growth rate≤0, then proposing that entering engine mode two requests, so as to the greatest extent
It is fast to promote delivery temperature, to improve passive regeneration efficiency, reduce soot growth rate；
If carbon accumulation value >=carbon carrying capacity value, but soot growth rate > 0, then propose that entering engine mode three requests, the row of raising
The discharge that original machine soot value is reduced while temperature is spent, further speeds up passive regeneration efficiency, to quickly make the soot in DPF
It reduces, maintains equilibrium state；
It should be explained that engine response mode is three kinds: being respectively engine mode one, engine mode two, engine mould
Formula three.
Engine mode one is engine work mode, and engine performance and oil consumption are in best under this mode.
Engine mode two is engine temperature raising mode, needs engine to open temperature raising measure in such a mode, such as passes through
The measures such as spray improve engine exhaust temperature after adjusting air throttle, unlatching；
Engine mode three is engine temperature raising and drop original machine soot mode, and engine opens the same of temperature raising measure in such a mode
When properly increase original machine NOxDischarge reduces soot emissions, to be conducive to accelerate passive regeneration reaction.
A kind of control system for DPF passive regeneration process is provided as a second aspect of the invention, wherein such as Figure 10
Shown, the control system includes:
Signal input module 100, the signal input module 100 are used to input in engine and aftertreatment sensors coherent signal
To other required modules；
Original machine is vented computing module 200, and the original machine exhaust computing module 200 can calculate engine emission and enter inside DPF
Soot mass flow and the NO mass flow that is discharged into inside DOC and NO2Mass flow；
DOC chemically reacts module 300, and NO oxidation reaction and NO occurs in the DOC chemical reaction module 3002Back reaction, and count
Calculate the NO mass flow and NO at DOC outlet2Mass flow；
Passive regeneration reaction occurs in the DPF computing module 400 for DPF computing module 400, and can calculate inside DPF in real time
The passive regeneration of generation reacts consumed soot mass flow；
Coordinating control module 500, the coordinating control module 500 be used for according in DPF soot cumulant and soot change rate into
Row judgement, if to trigger temperature raising demand or require engine switching working mode；
It is to be understood that the soot mass flow in the tail gas of engine emission is the soot quality stream entered inside DPF
It measures, NO mass flow and NO in the tail gas of engine emission2Mass flow is the NO mass flow being discharged into inside DOC
And NO2Mass flow；
As shown in figure 11, the DOC chemical reaction module 300 specifically includes: DOC temperature field model module 310, NO oxidation reaction
Computing module 320, NO2Back reaction computing module 330 and iterative calculation module 340；
The DOC temperature field model module 310 is used for according to DOC inlet real time temperature and engine real-time ventilation mass flowmenter
The temperature of every part of DOC carrier is calculated, and the temperature information of every part of DOC carrier is sent to NO oxidation reaction computing module 320 and NO2
Back reaction computing module 330；
The NO oxidation reaction computing module 320 for calculate each part DOC carrier after NO oxidation reaction occurs its respectively export
The NO mass flow and NO at place2Mass flow, and by the NO mass flow and NO2Mass flow information is conveyed to NO2Back reaction
Computing module 330；By inquiring temperature-exhaust mass flow-NO oxidation rate MAP chart, the temperature with each part carrier is obtained
NO oxidation rate corresponding with engine real-time ventilation mass flow, according to the NO oxidation rate and engine emission into
Enter NO mass flow and the NO inside DOC2Mass flow calculates after NO oxidation reaction only occurs at each part DOC carrier outlet
NO mass flow and NO2Mass flow；It should be explained that the NO oxidation equation formula are as follows: 2NO+O2→2NO2；
The NO2Back reaction computing module 330 is according to the NO mass flow and NO in its respective exit after NO oxidation reaction2Quality
For calculating each part DOC carrier NO oxidation reaction and NO are occurring for the transmission of flow information computing module2It is respectively after back reaction
The NO mass flow and NO in exit2Mass flow；By inquiring temperature-exhaust mass flow-NO2The MAP of back reaction rate
Figure, obtains NO corresponding with the temperature of each part carrier and engine real-time ventilation mass flow2Back reaction rate, according to NO2It is inverse
The NO mass flow and NO in reaction rate and each part DOC carrier its respective exit after NO oxidation reaction occurs2Quality stream
Amount calculates and NO oxidation reaction and NO is occurring2NO mass flow and NO after back reaction at each part DOC carrier outlet2Quality stream
Amount；It should be explained that the NO2Back reaction equation are as follows: 2NO2→2NO+O2；
The iterative calculation module 340 will be for that will occur NO oxidation reaction and NO2After back reaction at each part DOC carrier outlet
NO mass flow and NO2Mass flow is iterated calculating, NO mass flow and NO at final output DOC outlet2Quality stream
Amount.
As shown in figure 12, the DPF computing module 400 specifically includes: dpf temperature field model module 410, chemical reaction meter
Calculate module 420, passive regeneration Response calculation module 430 and soot computing module 440；
The dpf temperature field model module 410 is used for temperature and engine exhaust mass flow calculation according to the DPF entrance
Mean temperature inside DPF out, and send the mean temperature information inside the DPF to chemical reaction 420 He of computing module
Passive regeneration Response calculation module 430；
The chemical reaction computing module 420 is used to calculate the NO inside DPF2Mass flow, and by the NO2Mass flow
Information sends passive regeneration Response calculation module 430 to；Specifically, the chemical reaction computing module 420 is according to temperature-exhaust
MAP chart and temperature-exhaust mass flow-NO of mass flow-NO oxidation rate2The MAP chart of back reaction rate, finds respectively
With the mean temperature and the corresponding NO oxidation rate of extraction flow and NO inside the DPF2Back reaction rate；Then further according to
The NO and NO that NO mass flow, the DPF passive regeneration entered from DPF entrance generates2Mass flow and NO oxidation rate and NO2
Back reaction speedometer calculates the NO inside DPF2Mass flow；
The passive regeneration Response calculation module 430 is found according to temperature-extraction flow-passive regeneration reaction rate MAP chart
With the mean temperature and the corresponding passive regeneration reaction rate of extraction flow inside DPF；And it is reacted according to the passive regeneration
NO inside rate and the DPF2Mass flowmenter calculates passive regeneration inside DPF and reacts the soot mass flow consumed；
The passive regeneration Response calculation module 430 calculates soot passive regeneration speed according to the soot mass flowmenter consumed
Rate, and the soot passive regeneration rate information is transferred to soot computing module 440；
The soot computing module 440 is used for according to the soot mass flow into inside DPF and soot passive regeneration speed
Rate calculates the soot growth rate in soot accumulated value and statistical time inside DPF by integrating meter.
It should be understood by those ordinary skilled in the art that: the above is only a specific embodiment of the present invention, and
It is not used in the limitation present invention, all any modification, equivalent substitution, improvement and etc. within purport of the invention, done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of control method for DPF passive regeneration process, which is characterized in that described for DPF passive regeneration process
Control method includes:
It calculates engine emission and enters the real-time soot mass flow inside DPF；
It calculates the passive regeneration occurred in real time inside DPF and reacts consumed soot mass flow；
Soot passive regeneration is calculated according to the soot mass flow into inside DPF and the soot mass flowmenter consumed
Rate；
It is calculated inside DPF according to the soot mass flow into inside DPF and soot passive regeneration rate by integrating meter
Soot accumulated value and statistical time in soot growth rate；
Judged according to the soot growth rate in the soot accumulated value and statistical time, if to trigger temperature raising demand or want
Seek engine switching working mode.
2. being used for the control method of DPF passive regeneration process as described in claim 1, which is characterized in that described: calculating is started
Machine is discharged into the real-time soot mass flow step inside DPF
Schemed according to soot flow mass M AP under engine speed and Engine Injection Mass inquiry original machine stable state, obtains corresponding stable state
Soot mass flow；
Air-fuel ratio MAP chart is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ, obtains air-fuel ratio λ change rate
To the correction amount of soot；
Correction amount of the air-fuel ratio λ change rate to soot is multiplied with the soot mass flow of the stable state inquired and is calculated
Soot mass flow in real time is discharged into inside DPF to described.
3. being used for the control method of DPF passive regeneration process as described in claim 1, which is characterized in that described: calculating
The soot mass flow step that the passive regeneration occurred in real time inside DPF reacts consumed also carries out before:
It calculates engine emission and enters real-time NO mass flow and real-time NO inside DOC2Mass flow；
Calculate the real-time NO mass flow at DOC outlet and real-time NO2Mass flow.
4. being used for the control method of DPF passive regeneration process as claimed in claim 3, which is characterized in that described: calculating hair
Motivation is discharged into real-time NO mass flow and real-time NO inside DOC2Mass flow specifically includes:
Schemed according to NO flow mass M AP under engine speed and Engine Injection Mass inquiry original machine stable state, it is steady to obtain corresponding NO
State mass flow；
Air-fuel ratio MAP chart is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ, obtains air-fuel ratio λ change rate
To the correction amount of soot；
Correction amount of the air-fuel ratio λ change rate to soot is added with the NO steady state mass flow inquired, institute is calculated
State the real-time NO mass flow being discharged into inside DOC；
According to NO under engine speed and Engine Injection Mass inquiry original machine stable state2Flow mass M AP figure, obtains corresponding NO2Surely
State mass flow；
Air-fuel ratio MAP chart is inquired according to the changing value of original machine stable state air-fuel ratio λ and real-time air-fuel ratio λ, obtains air-fuel ratio λ change rate
To the correction amount of soot；
By the air-fuel ratio λ change rate to the correction amount of soot and the NO inquired2Institute is calculated in the addition of steady state mass flow
State the real-time NO being discharged into inside DOC2Mass flow.
5. being used for the control method of DPF passive regeneration process as claimed in claim 3, which is characterized in that described: calculating
Real-time NO mass flow and real-time NO at DOC outlet2Mass flow step specifically includes:
DOC carrier is equally divided into several pieces from the inlet to the outlet and is used to be iterated calculating；
Calculate the temperature of every part of DOC carrier；
Calculate the NO mass flow and NO in each part DOC carrier its respective exit after NO oxidation reaction occurs2Mass flow；
It calculates each part DOC carrier and NO oxidation reaction and NO is occurring2The NO mass flow and NO in its respective exit after back reaction2
Mass flow；
NO oxidation reaction and NO will occur2NO mass flow and NO after back reaction at each part DOC carrier outlet2Mass flow
It is iterated calculating, NO mass flow and NO at final output DOC outlet2Mass flow.
6. being used for the control method of DPF passive regeneration process as described in claim 1, which is characterized in that described: calculating
The soot mass flow step that the passive regeneration occurred in real time inside DPF reacts consumed specifically includes:
The mean temperature inside DPF is calculated according to DPF inlet temperature and exhaust mass flow；
Calculate the NO inside DPF2Mass flow.
7. being used for the control method of DPF passive regeneration process as claimed in claim 6, which is characterized in that described: according to
The mean temperature step that DPF inlet temperature and exhaust mass flow calculate inside DPF specifically includes:
According to temperature-exhaust mass flow-NO oxidation rate MAP chart and temperature-exhaust mass flow-NO2Back reaction rate
MAP chart, find respectively and the mean temperature and the corresponding NO oxidation rate of extraction flow and NO inside the DPF2It is converse
Answer rate；
The NO and NO generated further according to the NO mass flow, the DPF passive regeneration that enter from DPF entrance2Mass flow and NO oxygen
Change rate and NO2Back reaction speedometer calculates the NO inside DPF2Mass flow；
According to temperature-extraction flow-passive regeneration reaction rate MAP chart, find and the mean temperature and exhaust stream inside DPF
Measure corresponding passive regeneration reaction rate；
According to the NO inside the passive regeneration reaction rate and the DPF2It is anti-that mass flowmenter calculates passive regeneration inside DPF
The soot mass flow that should be consumed；Soot passive regeneration rate is calculated according to the soot mass flowmenter consumed.
8. being used for the control method of DPF passive regeneration process as described in claim 1, which is characterized in that described:
It is specifically wrapped according to the engine response mode of the soot growth rate starting response in the soot accumulated value and statistical time
Include following steps:
If average exhaust is less than limit value within a certain period of time, judge between the soot accumulated value and carbon carrying capacity value
Relationship between relationship and soot growth rate and 0；
If carbon accumulation value < carbon carrying capacity value, and soot growth rate < 0, then maintaining engine mode one constant；
If carbon accumulation value < carbon carrying capacity value, but soot growth rate > 0, then proposing that entering engine mode two requests, so as to the greatest extent
It is fast to promote delivery temperature, to improve passive regeneration efficiency, reduce soot growth rate；
If carbon accumulation value >=carbon carrying capacity value, but soot growth rate≤0, then proposing that entering engine mode two requests, so as to the greatest extent
It is fast to promote delivery temperature, to improve passive regeneration efficiency, reduce soot growth rate；
If carbon accumulation value >=carbon carrying capacity value, but soot growth rate > 0, then propose that entering engine mode three requests, the row of raising
The discharge that original machine soot value is reduced while temperature is spent, further speeds up passive regeneration efficiency, to quickly make the soot in DPF
It reduces, maintains equilibrium state.
9. a kind of control system for DPF passive regeneration process, which is characterized in that described for DPF passive regeneration process
Control system includes:
Signal input module, the signal input module are used to engine and aftertreatment sensors coherent signal inputing to original machine
It is vented computing module, DOC chemical reaction module, DPF computing module and coordinating control module；
Original machine is vented computing module, and original machine exhaust computing module can calculate engine emission and enter soot inside DPF
Mass flow and the NO mass flow being discharged into inside DOC and NO2Mass flow；
DOC chemically reacts module, and NO oxidation reaction and NO occurs in the DOC chemical reaction module2Back reaction, and calculate DOC and go out
NO mass flow and NO at mouthful2Mass flow；
Passive regeneration reaction occurs in the DPF computing module for DPF computing module, and can calculate and occur in real time inside DPF
Passive regeneration reacts consumed soot mass flow；
Coordinating control module, the coordinating control module be used for according in DPF soot cumulant and soot change rate judged,
Whether to trigger temperature raising demand or require engine switching working mode.
10. being used for the control system of DPF passive regeneration process as claimed in claim 9, which is characterized in that the DOC chemistry
Reaction module specifically includes:
DOC temperature field model module, the DOC temperature field model module are used for real according to DOC inlet real time temperature and engine
When exhaust mass flow calculate the temperature of every part of DOC carrier, and the temperature information of every part of DOC carrier is sent to NO oxidation reaction
Computing module and NO2Back reaction computing module；
For calculating each part DOC carrier NO oxidation is occurring for NO oxidation reaction computing module, the NO oxidation reaction computing module
The NO mass flow and NO in its respective exit after reaction2Mass flow, and by the NO mass flow and NO2Mass flow letter
Breath is conveyed to NO2Back reaction computing module；
NO2Back reaction computing module, the NO2Back reaction computing module is according to the NO matter in its respective exit after NO oxidation reaction
Measure flow and NO2For calculating each part DOC carrier NO oxidation reaction and NO are occurring for the transmission of mass flow information computing module2
The NO mass flow and NO in its respective exit after back reaction2Mass flow；
Module is iterated to calculate, the iterative calculation module will be for that will occur NO oxidation reaction and NO2Each part DOC is carried after back reaction
The NO mass flow and NO in body exit2Mass flow is iterated calculating, the NO mass flow at final output DOC outlet and
NO2Mass flow.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797536A (en) * | 2011-05-25 | 2012-11-28 | 通用汽车环球科技运作有限责任公司 | Method for determining load of particulate filter |
| CN103032142A (en) * | 2011-09-30 | 2013-04-10 | 沃尔沃汽车公司 | Soot emission estimation method and arrangement |
| CN106481419A (en) * | 2016-11-08 | 2017-03-08 | 清华大学苏州汽车研究院（吴江） | A kind of carbon deposition quantity computational methods of diesel engine particle catcher |
| CN108087071A (en) * | 2017-12-05 | 2018-05-29 | 南京依柯卡特排放技术股份有限公司 | To the determination methods of DPF carbon carrying capacity |
-
2019
- 2019-01-16 CN CN201910039717.XA patent/CN109488417B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797536A (en) * | 2011-05-25 | 2012-11-28 | 通用汽车环球科技运作有限责任公司 | Method for determining load of particulate filter |
| CN103032142A (en) * | 2011-09-30 | 2013-04-10 | 沃尔沃汽车公司 | Soot emission estimation method and arrangement |
| CN106481419A (en) * | 2016-11-08 | 2017-03-08 | 清华大学苏州汽车研究院（吴江） | A kind of carbon deposition quantity computational methods of diesel engine particle catcher |
| CN108087071A (en) * | 2017-12-05 | 2018-05-29 | 南京依柯卡特排放技术股份有限公司 | To the determination methods of DPF carbon carrying capacity |
Cited By (19)
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|---|---|---|---|---|
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| CN112507541A (en) * | 2020-11-30 | 2021-03-16 | 潍柴动力股份有限公司 | Differential pressure carbon loading capacity calculation method and related equipment |
| CN112395710A (en) * | 2020-12-02 | 2021-02-23 | 潍柴动力股份有限公司 | Carbon loading model correction method and device |
| CN112395710B (en) * | 2020-12-02 | 2023-11-17 | 潍柴动力股份有限公司 | Correction method and device for carbon loading model |
| CN112727569A (en) * | 2021-01-08 | 2021-04-30 | 东风商用车有限公司 | DPF self-adaptive active regeneration control method, device and system |
| CN114183222A (en) * | 2021-10-29 | 2022-03-15 | 东风商用车有限公司 | Engine control method and system for strengthening passive regeneration capability of DPF |
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| CN115306523B (en) * | 2022-07-14 | 2024-05-17 | 潍柴动力股份有限公司 | Engine DPF control method and device |
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