CN110030072A - Engine exhaust filter carbon distribution quantity monitoring method - Google Patents
Engine exhaust filter carbon distribution quantity monitoring method Download PDFInfo
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- CN110030072A CN110030072A CN201910007566.XA CN201910007566A CN110030072A CN 110030072 A CN110030072 A CN 110030072A CN 201910007566 A CN201910007566 A CN 201910007566A CN 110030072 A CN110030072 A CN 110030072A
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Classifications
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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
-
- 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
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
-
- 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
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0412—Methods of control or diagnosing using pre-calibrated maps, tables or charts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The present invention relates to motor exhaust processing techniques.The invention discloses a kind of engine exhaust filter carbon distribution quantity monitoring methods, to solve the problems, such as filter regeneration opportunity accurate judgement.Key step of the invention includes: using filter exhaust volume flow Q as electric current I；Filter imports and exports resistance R of the flow resistance as equivalent-circuit model caused by local resistances；Resistance R of the flow resistance that filter media and carbon distribution generate as equivalent-circuit modeld；Capacitor C of the gas compression rate as equivalent-circuit model in filter；Establish equivalent-circuit model.According to above-mentioned model, resistance R is drawn by acquisition filter device exhaust parameterdVariation with temperature curve；Further according to filter upstream exhaust temperature T at this time and resistance RdVariation with temperature curve carries out interpolation, obtains corresponding carbon deposition quantity.The present invention can rapidly and accurately calculate the carbon deposition quantity of filter.Equivalent-circuit model of the invention is not influenced by engine exhaust pulse characteristic, it is ensured that the accuracy of monitoring.
Description
Technical field
The present invention relates to motor exhaust processing technology fields, more particularly to engine exhaust filter, and in particular to
A kind of engine exhaust filter carbon distribution quantity monitoring method.
Background technique
In recent years, domestic and international emission regulation is increasingly stringenter, and relies solely on the method for optimization in-cylinder combustion to reduce pollution
Object discharge amount has been unable to satisfy the requirement of emission regulation, and diesel engine, which must install after-treatment device just, can effectively reduce exhaust dirt
Contaminate object.Diesel engine is most important discharge pollutants first is that particulate matter (PM), usually carbon particle.
Diesel engine particle catcher (DPF Diesel Particulate Filter) is called and makees filter, is quilt at present
After-treatment device being widely recognized as, can be effectively reduced diesel particulate emission.Its principle is to utilize the more of filter-carrier
Permeability traps particulate matter, to achieve the purpose that reduce particulate matter in exhaust.
The material that filtering exhaust optimum uses is porous media or fiber filter material, and applying at present at most is wall
Streaming honeycomb ceramic filter body.The course of work of filter includes micro particle catching process and regenerative process.On vehicle, it is
It being mounted in diesel engine exhaust system, the particulate matter in exhaust stream is attracted to the surface of its interior carrier material, here it is
The process of micro particle catching.
With the continuous adsorbent particles of filter, the PM in filter is constantly accumulated, and causes exhaust back pressure (i.e. filter upstream
Pressure) it gradually increases.It can make engine performance deterioration, and with PM when exhaust back pressure is more than 20kPa according to correlative study
Continuous accumulation in the filter will lead to exhaust back pressure increase, decline diesel engine performance.So when filter uses one section
Between after need to clean up the PM wherein accumulated using certain technology, reduce exhaust resistance, this process is known as filter
Regeneration.
Diesel engine works in nominal situation, and delivery temperature is generally at 250~500 DEG C, and the burning point of particle is higher than this
It is more, generally at 550~600 DEG C, so being difficult to realize trap again only by the so high temperature of diesel exhaust gas
It is raw, generally regeneration is realized by way of the burning point or raising delivery temperature that reduce particle.
Filter regeneration mode is divided into initiative regeneration and passive regeneration, and studying more regeneration at present has: oil spout or
The combustion-supporting regeneration of jet, electric heating regeneration, infrared heating regeneration, microwave heating regeneration etc..Initiative regeneration is to engine operating condition and combustion
Sulfur content requires lower in oil, is easier to realize than passive regeneration.But its filtering body be easy to produce cause thermal damage, system complex, at
This height.
In filter regeneration, filtering body can be because regeneration opportunity early causes very much to regenerate incomplete or regeneration opportunity too
Local scorification and rupture are caused late.Therefore, accurate judgement filter regeneration opportunity, i.e., high-precision carbon deposition quantity estimation, to guarantee
The safety of filter regeneration and completeness are of great significance.
Chinese patent notification number CN104061051A disclose one kind can accurately hold diesel particulate trap regeneration when
The method of machine, this method are to obtain filter carbon carrying capacity estimated value, while root with the corresponding table of carbon carrying capacity by consulting pressure difference
It is modified according to mileage travelled and running time.This method requires the pressure difference of calibration with the corresponding meter accuracy of carbon carrying capacity
It is very high, and the error of pressure difference measured in the transient condition of actual travel is not handled.Therefore this method difficulty
Height, estimated accuracy are inadequate.
Chinese patent notification number CN103620169A discloses a kind of diesel particulate filter state monitoring apparatus, the dress
It sets pressure value measured by the pressure monitoring unit by filter upstream and downstream and carries out Fourier transform respectively, then by upstream and downstream pressure
Force value transformation gained spectrum intensity and/or phase are compared, and finally determine to filter by state determination unit based on comparative result
The state of device.However the state monitoring apparatus lacks detailed description for the determination method of state determination unit, simultaneously for estimating
Meter precision does not illustrate.
Chinese patent notification number CN103511043A is proposed to be corrected using delivery temperature before and after filter and extraction flow
Filter differential pressure and air speed afterwards inquires the method for obtaining carbon accumulation amount, but there is still a need under a large amount of different operating conditions for this method
The carbon accumulation amount inquiry table demarcated, experimental work amount are big, very high to inquiry table required precision.
Summary of the invention
The main purpose of the present invention is to provide engine exhaust filter carbon distribution quantity monitoring methods, to solve filter again
Raw opportunity accurate judgement problem.
To achieve the goals above, the one aspect of specific embodiment according to the present invention, provides a kind of engines tail
Air filter carbon distribution quantity monitoring method, which comprises the steps of:
Equivalent-circuit model is established, the equivalent-circuit model is by resistance Rs, resistance RdIt is constituted with capacitor C, resistance RsWith electricity
Hinder RdSeries connection, capacitor C are connected in parallel on resistance RdBoth ends, the equivalent-circuit model both end voltage are U, electric current I；
Pressure difference △ P is as voltage U for filter upstream and downstream；
Filter exhaust volume flow Q is as electric current I；
Filter imports and exports resistance R of the flow resistance as equivalent-circuit model caused by local resistances；
Resistance R of the flow resistance that filter media and carbon distribution generate as equivalent-circuit modeld；
Capacitor C of the gas compression rate as equivalent-circuit model in filter；
According to above-mentioned model, pass through acquisition filter device upstream and downstream pressure difference △ P, filter exhaust volume flow Q and filtering
Device upstream exhaust temperature T, determines resistance Rs, resistance RdWith the value of capacitor C；
Draw resistance RdVariation with temperature curve；
Filter upstream and downstream pressure difference △ P, the exhaust volumetric flow Q of acquisition and filter upstream exhaust temperature T's is real-time
Resistance R is obtained by calculation in data in equivalent-circuit modeldResistance value, produced using this resistance value as filter media and carbon distribution
Raw flow resistance, further according to filter upstream exhaust temperature T at this time and resistance RdVariation with temperature curve carries out interpolation, obtains
Corresponding carbon deposition quantity.
Further, it further comprises the steps of:
The carbon deposition quantity is compared with given threshold, when the carbon deposition quantity >=given threshold, starts filter
Regenerate process.
Further: the given threshold is determined according to filter upstream pressure.
Further: the filter upstream pressure is 20kPa.
It is further: the math equation of the equivalent-circuit model are as follows:
U=Us+Ud=IRs+Ud
Wherein, UdFor resistance RdThe voltage at both ends；UsFor resistance RsThe voltage at both ends；T is the time.
Further: the algorithm is Kalman filtering algorithm.
It is further:
Resistance RsIt indicates are as follows: Rs=a0+a1T+a2T2；
Resistance RdIt indicates are as follows: Rd=b0+b1T+b2T2；
Capacitor C is indicated are as follows: C=c0+c1T+c2T2；
Wherein, a0、a1、a2、b0、b1、b2、c0、c1、c2For coefficient；T is filter upstream exhaust temperature.
It is further: resistance RsIt is acquisition filter device upstream difference exhaust temperature under conditions of carbon deposition quantity is zero with capacitor C
Pressure difference △ P, the exhaust volumetric flow Q for spending lower filter upstream and downstream, substitute into the value that equivalent-circuit model is calculated.
It is further: with above-mentioned resistance RsBased on, pressure difference △ P, the exhaust volume that will be measured under the conditions of different carbon deposition quantities
Flow Q data substitute into equivalent-circuit model and are calculated, and obtain the resistance R in the case of each carbon deposition quantitydValue.
It is further: to draw resistance RdVariation with temperature curve method particularly includes:
The experiment of device carbon accumulation is filtered under certain operating condition, monitoring and recording filter upstream and downstream pressure difference in experimentation,
Exhaust volumetric flow and filter upstream exhaust temperature, carbon accumulation experiment after a certain period of time, weigh to carbon deposition quantity
And it records；
Since white carrier, carbon accumulation experiment is repeatedly carried out, it is each within the scope of from 0g to the given threshold to obtain carbon deposition quantity
Under different carbon deposition quantities, filter upstream and downstream pressure difference, exhaust volumetric flow and filter upstream exhaust temperature these experimental datas；
Using measured experimental data and equivalent-circuit model, when carbon deposition quantity is zero, parameter identification is carried out, is
Number a0, a1, a2And c0, c1, c2Value；
When carbon deposition quantity is not zero, a0, a1, a2And c0, c1, c2Value to be fixed as aforementioned value constant, utilize different carbon deposition quantities
Experimental data, carry out parameter identification, obtain coefficient b under the conditions of different carbon deposition quantities0, b1, b2Value；
According to coefficient b under the conditions of different carbon deposition quantities0, b1, b2Value, utilize formula Rd=b0+b1T+b2T2Obtain different carbon distributions
Measure lower RdThe curve varied with temperature.
The invention has the advantages that providing a kind of new engine filters carbon deposition quantity based on equivalent-circuit model
Estimation method can rapidly and accurately calculate the carbon deposition quantity of filter；Equivalent-circuit model of the invention is not arranged by engine
The influence of gaseous pulse dynamic characteristic, it is ensured that the accuracy of monitoring；The present invention only need to draw R under different carbon carrying capacity by experimentdWith temperature
The curve for spending variation substantially reduces conventional method and needs to carry out the workload that many experiments draw arteries and veins spectrogram；The present invention has
The characteristics of real-time high-efficiency.
The present invention is described further with reference to the accompanying drawings and detailed description.The additional aspect of the present invention and excellent
Point will be set forth in part in the description, and partially will become apparent from the description below, or practice through the invention
It solves.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, specific implementation of the invention
Mode, illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is equivalent-circuit model schematic diagram；
Fig. 2 is R under different carbon carrying capacitydThe curve varied with temperature.
Wherein:
I is the volume flow of exhaust；
RsFlow resistance caused by local resistance is imported and exported for filter；
C is the compressibility of gas in filter；
RdFor flow resistance caused by on-way resistance；
U is the pressure difference of filter upstream and downstream；
UsFor resistance RsThe voltage at both ends represents the pressure drop that filter inlet and outlet local resistance generates；
UdFor resistance RdThe voltage at both ends represents the pressure drop of on-way resistance generation.
Specific embodiment
It should be noted that in the absence of conflict, specific embodiment, embodiment in the application and therein
Feature can be combined with each other.It lets us now refer to the figures and combines the following contents the present invention will be described in detail.
In order to make those skilled in the art better understand the present invention program, below in conjunction with specific embodiment party of the present invention
Attached drawing in formula, embodiment, to the technical solution in the specific embodiment of the invention, embodiment carry out it is clear, completely retouch
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In specific embodiment, embodiment, those of ordinary skill in the art are obtained without making creative work
Every other embodiment, embodiment, should fall within the scope of the present invention.
The technical scheme is that
The pressure difference of engine exhaust filter upstream and downstream is measured using pressure sensor；
Using the extraction flow and delivery temperature of flow sensor and temperature sensor real-time monitoring engine.
During calculating carbon deposition quantity, equivalent-circuit model is introduced, by filter upstream and downstream pressure difference, engine exhaust flow
And delivery temperature obtains the flow resistance of on-way resistance generation, then inquires under different carbon accumulation amounts, the flow resistance and temperature that on-way resistance generates
The relational graph of degree obtains corresponding carbon deposition quantity.
The establishment process of equivalent-circuit model of the invention specifically:
In a fluid,(Q-flow, △ P-pressure difference, R-flow resistance), therefore
The volume flow Q of exhaust is equivalent to the electric current I of circuit；
Flow resistance caused by filter inlet and outlet local resistance is equivalent to the resistance R of circuits；
The flow resistance that on-way resistance generates is equivalent to the resistance R of circuitd；
The pressure difference △ P of filter upstream and downstream is equivalent to the voltage U at circuit both ends；
Equivalent-circuit model is by resistance RsWith resistance RdIn series, equivalent-circuit model both end voltage is U, electric current I.
Since gas has compressibility, and at a certain temperature, gas compressibility is only related with the variation of gas V, P
(gas compressibility factor can indicate are as follows:β is gas compressibility factor, and V is gas volume, and P is gas pressure
By force).In filter body, the variation of gas V, P are only related in the intracorporal compression of filter and temperature with exhaust, therefore
The compressibility of gas is equivalent to the capacitor C, C=c of circuit in filter body0+c1T+c2T2(c0, c1, c2For ginseng
Number) and capacitor C be connected in parallel on resistance RdBoth ends.As shown in Figure 1.
Capacitor C can filter out the pulse characteristic of engine exhaust air-flow, make flow resistance R produced by the carbon distribution being calculatedd
It is more acurrate.
Thus the math equation of equivalent-circuit model is obtained are as follows:
U=Us+Ud=IRs+Ud
In the present invention, under different carbon deposition quantities, the method for drafting of the relational graph of flow resistance and temperature that on-way resistance generates is such as
Under:
The experiment of engine filters carbon deposition quantity, monitoring and recording filter upstream and downstream in experimentation are carried out under certain operating condition
Pressure difference, exhaust volumetric flow and filter upstream exhaust temperature, experiment after a certain period of time, weigh to carbon deposition quantity；
From Bai Zaiti (Rd=0) start, repeatedly carry out above-mentioned carbon distribution experiment, obtain carbon carrying capacity since 0g to needs and regenerate
Cumulant within the scope of under variant carbon carrying capacity, filter upstream and downstream pressure difference, exhaust volumetric flow and filter upstream row temperature
Spend these experimental datas；
Outside the influence for removing filtration device structure itself, it is contemplated that the influence of temperature convection resistance, by RsWrite as Rs=a0+a1T+
a2T2(wherein a0, a1, a2For parameter)；
In addition to the influence of carbon elimination carrying capacity, it is contemplated that the flow resistance R that temperature generates on-way resistancedInfluence, by RdWrite as Rd
=b0+b1T+b2T2(wherein b0, b1, b2For parameter)；
Using measured carbon distribution experimental data and equivalent-circuit model, in Bai Zaiti, i.e. RdParameter is carried out when=0 to distinguish
Know, obtains parameter a0, a1, a2And c0, c1, c2Value, while having carbon distribution, i.e. RdWhen ≠ 0, a0, a1, a2And c0, c1, c2Value
It is constant to be fixed as aforementioned value；
Using different carbon distributions (removing white carrier) experimental data, parameter identification is carried out, parameter b under every group of carbon distribution is obtained0, b1,
b2Value；
The each group b obtained using identification0, b1, b2Value, obtain R under different carbon carrying capacitydThe curve varied with temperature.Such as figure
Shown in 2.
A certain moment filter upstream exhaust temperature is subjected to a that parameter identification obtains with by white vehicle experiments data0, a1,
a2And c0, c1, c2Value substitute into equivalent-circuit model, this moment R is calculatedsWith the value of C；
According to measured this moment filter upstream and downstream pressure difference, exhaust volumetric flow and above-mentioned RsWith the value of C, benefit
With equivalent-circuit model, the flow resistance value R of on-way resistance generation is calculatedd；
According to above-mentioned RdValue and this moment filter upstream exhaust temperature, inquire R under different carbon carrying capacitydBecome with temperature
The curve graph of change obtains corresponding carbon deposition quantity after interpolation.
When carbon deposition quantity >=given threshold, starts filter regeneration process, filter is regenerated.
Above-mentioned given threshold determines that usual filter upstream pressure reaches 20kPa according to filter upstream pressure, means that pair
The carbon deposition quantity answered has reached given threshold, can star filter regeneration process.
Claims (10)
1. engine exhaust filter carbon distribution quantity monitoring method, which comprises the steps of:
Equivalent-circuit model is established, the equivalent-circuit model is by resistance Rs, resistance RdIt is constituted with capacitor C, resistance RsWith resistance Rd
Series connection, capacitor C are connected in parallel on resistance RdBoth ends, the equivalent-circuit model both end voltage are U, electric current I；
Pressure difference △ P is as voltage U for filter upstream and downstream；
Filter exhaust volume flow Q is as electric current I；
Filter imports and exports resistance R of the flow resistance as equivalent-circuit model caused by local resistances；
Resistance R of the flow resistance that filter media and carbon distribution generate as equivalent-circuit modeld；
Capacitor C of the gas compression rate as equivalent-circuit model in filter；
According to above-mentioned model, by acquisition filter device upstream and downstream pressure difference △ P, filter exhaust volume flow Q and filter
Delivery temperature T is swum, determines resistance Rs, resistance RdWith the value of capacitor C；
Draw resistance RdVariation with temperature curve；
Filter upstream and downstream pressure difference △ P, the exhaust volumetric flow Q of acquisition and the real time data of filter upstream exhaust temperature T,
Resistance R is obtained by calculation in equivalent-circuit modeldResistance value, the stream generated using this resistance value as filter media and carbon distribution
Resistance, further according to filter upstream exhaust temperature T at this time and resistance RdVariation with temperature curve carries out interpolation, obtains corresponding
Carbon deposition quantity.
2. engine exhaust filter carbon distribution quantity monitoring method according to claim 1, which is characterized in that further include step
It is rapid:
The carbon deposition quantity is compared with given threshold, when the carbon deposition quantity >=given threshold, starts filter regeneration
Process.
3. engine exhaust filter carbon distribution quantity monitoring method according to claim 2, it is characterised in that: the setting threshold
Value is determined according to filter upstream pressure.
4. engine exhaust filter carbon distribution quantity monitoring method according to claim 3, it is characterised in that: on the filter
Trip pressure is 20kPa.
5. engine exhaust filter carbon distribution quantity monitoring method according to claim 1, it is characterised in that: the equivalent electricity
The math equation of road model are as follows:
U=Us+Ud=IRs+Ud
Wherein, UdFor resistance RdThe voltage at both ends；UsFor resistance RsThe voltage at both ends；T is the time.
6. engine exhaust filter carbon distribution quantity monitoring method according to claim 1, it is characterised in that: the algorithm is
Kalman filtering algorithm.
7. engine exhaust filter carbon distribution quantity monitoring method, feature described in any one exist according to claim 1~6
In:
Resistance RsIt indicates are as follows: Rs=a0+a1T+a2T2；
Resistance RdIt indicates are as follows: Rd=b0+b1T+b2T2；
Capacitor C is indicated are as follows: C=c0+c1T+c2T2；
Wherein, a0、a1、a2、b0、b1、b2、c0、c1、c2For coefficient；T is filter upstream exhaust temperature.
8. engine exhaust filter carbon distribution quantity monitoring method according to claim 7, it is characterised in that: resistance RsAnd electricity
Hold C be under conditions of carbon deposition quantity is zero, pressure difference △ P of filter upstream and downstream under the difference delivery temperature of acquisition filter device upstream,
Exhaust volumetric flow Q substitutes into the value that equivalent-circuit model is calculated.
9. engine exhaust filter carbon distribution quantity monitoring method according to claim 8, it is characterised in that: with above-mentioned resistance
RsBased on, by pressure difference △ P measured under the conditions of different carbon deposition quantities, exhaust volumetric flow Q data substitute into equivalent-circuit model into
Row calculates, and obtains the resistance R in the case of each carbon deposition quantitydValue.
10. engine exhaust filter carbon distribution quantity monitoring method according to claim 7, it is characterised in that: draw resistance Rd
Variation with temperature curve method particularly includes:
The experiment of device carbon accumulation is filtered under certain operating condition, monitoring and recording filter upstream and downstream pressure difference, exhaust in experimentation
Volume flow and filter upstream exhaust temperature, carbon accumulation experiment after a certain period of time, weighed and remembered to carbon deposition quantity
Record；
Since white carrier, carbon accumulation experiment is repeatedly carried out, it is variant within the scope of from 0g to the given threshold to obtain carbon deposition quantity
Under carbon deposition quantity, filter upstream and downstream pressure difference, exhaust volumetric flow and filter upstream exhaust temperature these experimental datas；
Using measured experimental data and equivalent-circuit model, when carbon deposition quantity is zero, parameter identification is carried out, coefficient a is obtained0,
a1, a2And c0, c1, c2Value；
When carbon deposition quantity is not zero, a0, a1, a2And c0, c1, c2Value be fixed as that aforementioned value is constant, utilize the reality of different carbon deposition quantities
Data are tested, parameter identification is carried out, obtains coefficient b under the conditions of different carbon deposition quantities0, b1, b2Value；
According to coefficient b under the conditions of different carbon deposition quantities0, b1, b2Value, utilize formula Rd=b0+b1T+b2T2It obtains under different carbon deposition quantities
RdThe curve varied with temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405402A (en) * | 2022-08-29 | 2022-11-29 | 潍柴动力股份有限公司 | Method and device for determining carbon loading model, electronic equipment and storage medium |
| CN117846757A (en) * | 2024-03-08 | 2024-04-09 | 潍柴动力股份有限公司 | Carbon loading estimation method, device, equipment and storage medium |
-
2019
- 2019-01-04 CN CN201910007566.XA patent/CN110030072A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405402A (en) * | 2022-08-29 | 2022-11-29 | 潍柴动力股份有限公司 | Method and device for determining carbon loading model, electronic equipment and storage medium |
| 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 |
| CN117846757A (en) * | 2024-03-08 | 2024-04-09 | 潍柴动力股份有限公司 | Carbon loading estimation method, device, equipment and storage medium |
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Application publication date: 20190719 |