CN110259553A - A kind of calculation method, device and the electronic equipment of ternary catalyzing unit oxygen storage capacity - Google Patents
A kind of calculation method, device and the electronic equipment of ternary catalyzing unit oxygen storage capacity Download PDFInfo
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- CN110259553A CN110259553A CN201910580401.1A CN201910580401A CN110259553A CN 110259553 A CN110259553 A CN 110259553A CN 201910580401 A CN201910580401 A CN 201910580401A CN 110259553 A CN110259553 A CN 110259553A
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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
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
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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 present invention provides calculation method, device and the electronic equipments of a kind of ternary catalyzing unit oxygen storage capacity, obtain the real-time oxygen storage capacity in the ternary catalyzing unit storage oxygen process, then it calculates in the first oxygen storage capacity in the first measurement delay time of upstream oxygen sensor and the second oxygen storage capacity in the second measurement delay time of catalyst monitoring sensor, the first oxygen storage capacity and the second oxygen storage capacity has been used when ternary catalyzing unit oxygen storage capacity is calculated.The oxygen storage capacity in upstream oxygen sensor and catalyst monitoring sensor measurement delay time has been estimated through the invention, so that the calculated value for the ternary catalyzing unit oxygen storage capacity being calculated is more acurrate.
Description
Technical field
The present invention relates to oxygen storage capacity fields of measurement, more specifically, being related to a kind of calculating side of ternary catalyzing unit oxygen storage capacity
Method, device and electronic equipment.
Background technique
The oxygen storage capacity of ternary catalyzing unit be judge catalyst converter whether the important indicator of aging.When under ternary catalyzing unit oxygen storage capacity
When drop, show catalyst converter aging, needs to replace ternary catalyzing unit in time to guarantee that engine emission is not exceeded.Therefore, ternary
The accurate calculating of catalyst converter oxygen storage capacity is of great importance to the judgement of its performance.
The oxygen storage capacity of ternary catalyzing unit is measured by lambda sensor, but there are measurement delays for lambda sensor, and then survey
The oxygen storage capacity inaccuracy measured.
Summary of the invention
In view of this, the present invention provides calculation method, device and the electronic equipment of a kind of ternary catalyzing unit oxygen storage capacity, with solution
Certainly there are measurement delays for lambda sensor, and then measure the problem of obtained oxygen storage capacity inaccuracy.
In order to solve the above technical problems, present invention employs following technical solutions:
A kind of calculation method of ternary catalyzing unit oxygen storage capacity, comprising:
Obtain the real-time oxygen storage capacity in ternary catalyzing unit storage oxygen process；
According to the real-time oxygen storage capacity, the first oxygen storage capacity in the first measurement delay time of upstream oxygen sensor is calculated
With the second oxygen storage capacity in the second measurement delay time of catalyst monitoring sensor；The upstream oxygen sensor is located at the ternary
The upstream of catalyst converter；The catalyst monitoring sensor is located at the downstream of the ternary catalyzing unit；
Obtain the third oxygen storage capacity that the catalyst monitoring sensor measurement obtains；
According to first oxygen storage capacity, second oxygen storage capacity and the third oxygen storage capacity, the ternary catalyzing unit is calculated
Oxygen storage capacity.
Preferably, the ternary catalyzing unit oxygen storage capacity=third oxygen storage capacity-second oxygen storage capacity+first storage
Oxygen amount.
Preferably, described according to the real-time oxygen storage capacity, it calculates in the first measurement delay time of upstream oxygen sensor
The first oxygen storage capacity and catalyst monitoring sensor second measurement delay time in the second oxygen storage capacity, comprising:
When the upstream oxygen sensor detects that excess air coefficient is greater than preset value, obtains the ternary catalyzing unit and open
Begin to store the first real-time oxygen storage capacity when oxygen；
According to the described first real-time oxygen storage capacity, the first oxygen storage capacity in the first measurement delay time is calculated；
When the catalyst monitoring sensor detects oxygen, second before the full oxygen of ternary catalyzing unit storage is obtained
Real-time oxygen storage capacity；The real-time oxygen storage capacity includes the described first real-time oxygen storage capacity and the second real-time oxygen storage capacity；
According to the described second real-time oxygen storage capacity, the second oxygen storage capacity in the second measurement delay time is calculated.
Preferably, described according to the described first real-time oxygen storage capacity, calculate first in the first measurement delay time
Oxygen storage capacity, comprising:
Calculate the first difference of two adjacent the first real-time oxygen storage capacities；
Using the average value of first difference as the first oxygen content change rate in the first measurement delay time；
Using the product of the first measurement delay time and the first oxygen content change rate as first oxygen storage capacity.
Preferably, described according to the described second real-time oxygen storage capacity, calculate second in the second measurement delay time
Oxygen storage capacity, comprising:
Calculate the second difference of two adjacent the second real-time oxygen storage capacities；
Using the average value of second difference as the second oxygen content change rate in the second measurement delay time；
Using the product of the second measurement delay time and the second oxygen content change rate as second oxygen storage capacity.
Preferably, the real-time oxygen storage capacityWherein, dmO2For oxygen quality flow value；
Wherein, dmO2For oxygen quality flow value；Dm Air is mass air flow value；C is constant, and λ is excess air
Coefficient.
A kind of computing device of ternary catalyzing unit oxygen storage capacity, comprising:
Oxygen storage capacity obtains module, for obtaining the real-time oxygen storage capacity in ternary catalyzing unit storage oxygen process；
First oxygen storage capacity computing module, for calculating and being surveyed the first of upstream oxygen sensor according to the real-time oxygen storage capacity
Measure the first oxygen storage capacity in delay time and the second oxygen storage capacity in the second measurement delay time of catalyst monitoring sensor；It is described
Upstream oxygen sensor is located at the upstream of the ternary catalyzing unit；The catalyst monitoring sensor is located under the ternary catalyzing unit
Trip；
Oxygen storage capacity obtains module, the third oxygen storage capacity obtained for obtaining the catalyst monitoring sensor measurement；
Second oxygen storage capacity computing module, for being stored up according to first oxygen storage capacity, second oxygen storage capacity and the third
Oxygen amount calculates the ternary catalyzing unit oxygen storage capacity.
Preferably, the ternary catalyzing unit oxygen storage capacity=third oxygen storage capacity-second oxygen storage capacity+first storage
Oxygen amount.
Preferably, the first oxygen storage capacity computing module includes:
First data acquisition submodule, for detecting that excess air coefficient is greater than preset value when the upstream oxygen sensor
When, obtain the first real-time oxygen storage capacity when the ternary catalyzing unit starts to store oxygen；
First data computational submodule, for according to the described first real-time oxygen storage capacity, calculating in the first measurement delay
The first oxygen storage capacity in time；
Second data acquisition submodule, for obtaining the ternary and urging when the catalyst monitoring sensor detects oxygen
Change the second real-time oxygen storage capacity before the full oxygen of device storage；The real-time oxygen storage capacity includes the described first real-time oxygen storage capacity and described
Second real-time oxygen storage capacity；
Second data computational submodule, for according to the described second real-time oxygen storage capacity, calculating in the second measurement delay
The second oxygen storage capacity in time.
Preferably, the first data computational submodule is used for according to the described first real-time oxygen storage capacity, is calculated described the
One measurement delay time in the first oxygen storage capacity when, be specifically used for:
The first difference for calculating two adjacent the first real-time oxygen storage capacities, using the average value of first difference as described in
The first oxygen content change rate in first measurement delay time, the first measurement delay time and first oxygen content are become
The product of rate is as first oxygen storage capacity.
Preferably, the second data computational submodule is used for according to the described second real-time oxygen storage capacity, is calculated described the
Two measurement delay times in the second oxygen storage capacity when, be specifically used for:
The second difference for calculating two adjacent the second real-time oxygen storage capacities, using the average value of second difference as described in
The second oxygen content change rate in second measurement delay time, the second measurement delay time and second oxygen content are become
The product of rate is as second oxygen storage capacity.
Preferably, the real-time oxygen storage capacityWherein, dmO2For oxygen quality flow value；
Wherein, dmO2For oxygen quality flow value；Dm Air is mass air flow value；C is constant, and λ is excess air
Coefficient.
A kind of electronic equipment, comprising: memory and processor；
Wherein, the memory is for storing program；
Processor caller is simultaneously used for:
Obtain the real-time oxygen storage capacity in the ternary catalyzing unit storage oxygen process；
According to the real-time oxygen storage capacity, the first oxygen storage capacity in the first measurement delay time of upstream oxygen sensor is calculated
With the second oxygen storage capacity in the second measurement delay time of catalyst monitoring sensor；The upstream oxygen sensor is located at the ternary
The upstream of catalyst converter；The catalyst monitoring sensor is located at the downstream of the ternary catalyzing unit；
Obtain the third oxygen storage capacity that the catalyst monitoring sensor measurement obtains；
According to first oxygen storage capacity, second oxygen storage capacity and the third oxygen storage capacity, the ternary catalyzing unit is calculated
Oxygen storage capacity.
Compared to the prior art, the invention has the following advantages:
The present invention provides calculation method, device and the electronic equipments of a kind of ternary catalyzing unit oxygen storage capacity, obtain described three
Then real-time oxygen storage capacity in first catalyst converter storage oxygen process calculates in the first measurement delay time of upstream oxygen sensor
The first oxygen storage capacity and catalyst monitoring sensor second measurement delay time in the second oxygen storage capacity, urged ternary is calculated
The first oxygen storage capacity and the second oxygen storage capacity have been used when changing device oxygen storage capacity.Upstream oxygen sensor and downstream have been estimated through the invention
Oxygen storage capacity in the lambda sensor measurement delay time, so that the calculated value for the ternary catalyzing unit oxygen storage capacity being calculated is more acurrate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of ternary catalyzing unit provided in an embodiment of the present invention；
Fig. 2 is a kind of method flow diagram of the calculation method of ternary catalyzing unit oxygen storage capacity provided in an embodiment of the present invention；
Fig. 3 is a kind of calculating schematic diagram of a scenario of oxygen storage capacity provided in an embodiment of the present invention；
Fig. 4 is the method flow diagram of the calculation method of another ternary catalyzing unit oxygen storage capacity provided in an embodiment of the present invention；
Fig. 5 is the method flow diagram of the calculation method of another ternary catalyzing unit oxygen storage capacity provided in an embodiment of the present invention；
Fig. 6 is the method flow diagram of the calculation method of another ternary catalyzing unit oxygen storage capacity provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of the computing device of ternary catalyzing unit oxygen storage capacity provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of calculation method of ternary catalyzing unit oxygen storage capacity, the standards of ternary catalyzing unit oxygen storage capacity
Really calculating has important references value for its Performance Evaluation.
Before the calculation method for introducing ternary catalyzing unit oxygen storage capacity, the structure of ternary catalyzing unit is introduced first.
Referring to Fig.1, exhaust gas flow enters ternary catalyzing unit by exhaust pipe, and oxygen sensing is installed in usual ternary catalyzing unit upstream and downstream respectively
Device, upstream oxygen sensor can be broad domain oxygen sensor, be mainly used for the measurement of air excess factor value, enter three with judgement
The gaseous mixture of first catalyst converter is dense mixer or lean mixture.Under normal circumstances, excess air coefficient is equal to 1, when excessive sky
When gas coefficient is greater than 1, then it is assumed that entrance is lean mixture, when excess air coefficient is less than 1, then it is assumed that entrance is dense mixed
Close gas.Wherein, theoretical air matter needed for air quality/completely burned 1kg fuel that λ=burning 1kg fuel is actually supplied
Amount.
Catalyst monitoring sensor is switching mode lambda sensor, can judge that oxygen storage is full in catalyst converter with the size of its voltage value
Still it empties.
On the basis of the structure of above-mentioned ternary catalyzing unit, the calculation method of ternary catalyzing unit oxygen storage capacity is referred to Fig. 2,
Include:
Real-time oxygen storage capacity in S11, the acquisition ternary catalyzing unit storage oxygen process.
The oxygen inside ternary catalyzing unit is emptied first, then by adjusting excess air coefficient value, so that dilute mixing
Gas enters ternary catalyzing unit, starts to carry out oxygen storage when gaseous mixture is lean mixture when upstream oxygen sensor measures, open at this time
Begin to calculate real-time oxygen storage capacity, until catalyst monitoring sensor detects that the oxygen of storage stops calculating when being filled with.
During ternary catalyzing unit stores oxygen, every set time △ T, such as 1 second, primary real-time oxygen storage capacity is stored
Xi.Multiple real-time oxygen storage capacity Xi of storage are the multiple real-time oxygen storage capacities obtained.
Wherein, the real-time oxygen storage capacityWherein, dmO2For oxygen quality flow value；
Wherein, dmO2For oxygen quality flow value；Dm Air is mass air flow value；C is constant, this
Place can be 0.23, and the mass fraction of oxygen, λ are excess air coefficient as in air.
S12, according to the real-time oxygen storage capacity, calculate the first storage in the first measurement delay time of upstream oxygen sensor
Oxygen amount and the second oxygen storage capacity in the second measurement delay time of catalyst monitoring sensor.
Wherein, the upstream oxygen sensor is located at the upstream of the ternary catalyzing unit；The catalyst monitoring sensor is located at institute
State the downstream of ternary catalyzing unit.
Since there are measurement delays for lambda sensor, and then obtained oxygen storage capacity inaccuracy is measured, i.e., is sensed in upstream oxygen
In first measurement delay time of device and in the second measurement delay time of catalyst monitoring sensor, there are oxygen storage capacity, this implementation
Example stores the real-time oxygen storage capacity in oxygen process by ternary catalyzing unit to be calculated in the two measurement delay times
Oxygen storage capacity.
S13, the third oxygen storage capacity that the catalyst monitoring sensor measurement obtains is obtained.
Specifically, obtaining an oxygen storage capacity measurement when catalyst monitoring sensor detects that the oxygen in ternary catalyzing unit is filled with
Value, as third oxygen storage capacity, the third oxygen storage capacity are that catalyst monitoring sensor measurement obtains.
S14, according to first oxygen storage capacity, second oxygen storage capacity and the third oxygen storage capacity, calculate the ternary and urge
Change device oxygen storage capacity.
When calculating ternary catalyzing unit oxygen storage capacity, it is contemplated that the in the first measurement delay time of upstream oxygen sensor
One oxygen storage capacity and the second oxygen storage capacity in the second measurement delay time of catalyst monitoring sensor, that is, consider lambda sensor measurement
Oxygen storage capacity in lag time, so that the ternary catalyzing unit oxygen storage capacity being finally calculated is more acurrate.
In the present embodiment, the real-time oxygen storage capacity in the ternary catalyzing unit storage oxygen process is obtained, is then calculated upper
It swims the first oxygen storage capacity in the first measurement delay time of lambda sensor and measures delay time the second of catalyst monitoring sensor
The second interior oxygen storage capacity, the first oxygen storage capacity and the second oxygen storage capacity have been used when ternary catalyzing unit oxygen storage capacity is calculated.It is i.e. logical
The oxygen storage capacity of the invention estimated in upstream oxygen sensor and catalyst monitoring sensor measurement delay time is crossed, so that be calculated
The calculated value of ternary catalyzing unit oxygen storage capacity is more acurrate.
Optionally, in a kind of specific embodiment of the embodiment of the present invention, referring to Fig. 3, S1 is to start in the practical storage oxygen stage
At the time of, since there are hysteresis qualitys for upstream oxygen sensor, at the beginning of S2 point is upstream oxygen sensor measuring phases, E1 is real
At the time of border storage oxygen phase measuring terminates, E2 is the finish time based on catalyst monitoring sensor measuring phases.
It is lagged since upstream oxygen sensor exists, when upstream oxygen sensor monitors that exhaust gas for lean mixture, that is, exists
When the S2 moment, a certain amount of oxygen (OSC3) has been stored in practical ternary catalyzing unit.Likewise, when the oxygen in ternary catalyzing unit
Chu Man (changes to determine whether storing up full) at the E2 moment according to the voltage value of catalyst monitoring sensor, since downstream oxygen senses
The device property delayed causes a part of oxygen (OSC4) to be not stored in ternary catalyzing unit.Therefore the storage in practical ternary catalyzing unit
Oxygen amount=OSC1 (the third oxygen storage capacity obtained based on catalyst monitoring sensor measurement)-OSC4 (the second oxygen storage capacity)+OSC3 (the first storage
Oxygen amount).
In practical applications, referring to Fig. 4, the specific implementation process of step S12 may include:
S21, when the upstream oxygen sensor detect excess air coefficient be greater than preset value when, obtain the three-element catalytic
Device starts to store the first real-time oxygen storage capacity when oxygen.
Wherein, preset value can be 1.Specifically, after the oxygen inside ternary catalyzing unit is emptied, it is excessive by adjusting
Air coefficient value is greater than 1, so that lean mixture enters ternary catalyzing unit, it is dilute mixing when upstream oxygen sensor measures gaseous mixture
When gas, a first real-time oxygen storage capacity Xi is stored every △ T time, first 5 (can be demarcated, such as be can be set into greater than 2 and small
In 10 arbitrary value) current value storage into array.
S22, according to the described first real-time oxygen storage capacity, calculate the first oxygen storage capacity in the first measurement delay time.
In a kind of specific embodiment of the invention, it can be realized by following steps referring to Fig. 5, step S22:
S31, the first difference for calculating two adjacent the first real-time oxygen storage capacities.
S32, change the average value of first difference as the first oxygen content in the first measurement delay time
Rate.
S33, the product of the first measurement delay time and the first oxygen content change rate is stored up as described first
Oxygen amount.
Specifically, since second value, calculating separately the difference of each value Yu previous value when completing the 5th storage
Value (i.e. X2-X1, X3-X2 ... X5-X4), calculate average value Ku=[(X2-X1)+(X3-X2)+(X4-X3) of these differences
+ (X5-X4)]/(4 △ T), as (the i.e. first measurement delay time) oxygen content variation during upstream oxygen sensor measurement delay
Slope value (i.e. the first oxygen content change rate), then the oxygen storage capacity OSC3=of the first measurement delay time of upstream oxygen sensor
Ku*Tu, Tu are the first measurement delay time, are certain value, can obtain in advance.
S23, when the catalyst monitoring sensor detects oxygen, obtain before the ternary catalyzing unit stores full oxygen
Second real-time oxygen storage capacity.
The real-time oxygen storage capacity includes the described first real-time oxygen storage capacity and the second real-time oxygen storage capacity.
In a particular application, since the 6th value, (value before covering), the 7th number are placed it at the position X1 of array
Value is placed at the position X2 (value before covering) ... and so on.5 numerical value of every update calculate go on business according to the method described above
The average value Kd (value is also constantly updated) of value expires until catalyst monitoring sensor detects that oxygen stores, can store according to oxygen full
5 Xi values before, i.e., the second real-time oxygen storage capacity measure the second storage oxygen in delay time described second to be calculated
Amount.
S24, according to the described second real-time oxygen storage capacity, calculate the second oxygen storage capacity in the second measurement delay time.
Specifically, referring to Fig. 6, step S24 may include:
S31, the second difference for calculating two adjacent the second real-time oxygen storage capacities；
S32, change the average value of second difference as the second oxygen content in the second measurement delay time
Rate；
S33, the product of the second measurement delay time and the second oxygen content change rate is stored up as described second
Oxygen amount.
Specifically, oxygen storage capacity OSC4=Kd*Td, Kd and the Ku class in the second measurement delay time of catalyst monitoring sensor
It seemingly, is the slope value (i.e. second of (the i.e. second measurement delay time) oxygen content variation during upstream oxygen sensor measurement delay
Oxygen content change rate), Td is the second measurement delay time, is certain value, can obtain in advance.
It should be noted that the detailed process of step S31-S33 is similar with step S21-S23, step S21-S23 is please referred to
Explanation.
In the present embodiment, fully take into account the hysteresis characteristic of lambda sensor, using upstream and downstream lambda sensor delay parameter and
The oxygen storage capacity changed during carrying out predictive sensor delay for storing up the real-time oxygen storage capacity of oxygen in the beginning and end stage of oxygen process, has
Effect promotes the accuracy that ternary catalyzing unit oxygen storage capacity calculates.And it does not need to carry out any adjusting to engine, not need outer yet
Other devices are connect, there is preferable market application prospect.
Optionally, on the basis of the embodiment of the calculation method of above-mentioned ternary catalyzing unit oxygen storage capacity, of the invention is another
Embodiment provides a kind of computing device of ternary catalyzing unit oxygen storage capacity, referring to Fig. 7, may include:
Mass flow obtains module 101, for obtaining the real-time oxygen storage capacity in the ternary catalyzing unit storage oxygen process；
First oxygen storage capacity computing module 102, for calculating the first of upstream oxygen sensor according to the real-time oxygen storage capacity
Measure the first oxygen storage capacity in delay time and the second oxygen storage capacity in the second measurement delay time of catalyst monitoring sensor；Institute
State the upstream that upstream oxygen sensor is located at the ternary catalyzing unit；The catalyst monitoring sensor is located under the ternary catalyzing unit
Trip；
Oxygen storage capacity obtains module 103, the third oxygen storage capacity obtained for obtaining the catalyst monitoring sensor measurement；
Second oxygen storage capacity computing module 104, for according to first oxygen storage capacity, second oxygen storage capacity and the third
Oxygen storage capacity calculates the ternary catalyzing unit oxygen storage capacity.
Wherein, the real-time oxygen storage capacityWherein, dmO2For oxygen quality flow value；
Wherein, dmO2For oxygen quality flow value；Dm Air is mass air flow value；C is constant, and λ is excess air
Coefficient.
In the present embodiment, the real-time oxygen storage capacity in the ternary catalyzing unit storage oxygen process is obtained, is then calculated upper
It swims the first oxygen storage capacity in the first measurement delay time of lambda sensor and measures delay time the second of catalyst monitoring sensor
The second interior oxygen storage capacity, the first oxygen storage capacity and the second oxygen storage capacity have been used when ternary catalyzing unit oxygen storage capacity is calculated.It is i.e. logical
The oxygen storage capacity of the invention estimated in upstream oxygen sensor and catalyst monitoring sensor measurement delay time is crossed, so that be calculated
The calculated value of ternary catalyzing unit oxygen storage capacity is more acurrate.
It should be noted that the course of work of the modules in the present embodiment, please refers to corresponding in above-described embodiment
Illustrate, details are not described herein.
Optionally, on the basis of the embodiment of the computing device of above-mentioned ternary catalyzing unit oxygen storage capacity, the three-element catalytic
Device oxygen storage capacity=third oxygen storage capacity-second oxygen storage capacity+first oxygen storage capacity.
Further, the first oxygen storage capacity computing module includes:
First data acquisition submodule, for detecting that excess air coefficient is greater than preset value when the upstream oxygen sensor
When, obtain the first real-time oxygen storage capacity when the ternary catalyzing unit starts to store oxygen；
First data computational submodule, for according to the described first real-time oxygen storage capacity, calculating in the first measurement delay
The first oxygen storage capacity in time；
Second data acquisition submodule, for obtaining the ternary and urging when the catalyst monitoring sensor detects oxygen
Change the second real-time oxygen storage capacity before the full oxygen of device storage；The real-time oxygen storage capacity includes the described first real-time oxygen storage capacity and described
Second real-time oxygen storage capacity；
Second data computational submodule, for according to the described second real-time oxygen storage capacity, calculating in the second measurement delay
The second oxygen storage capacity in time.
Further, the first data computational submodule is used for according to the described first real-time oxygen storage capacity, is calculated described the
One measurement delay time in the first oxygen storage capacity when, be specifically used for:
The first difference for calculating two adjacent the first real-time oxygen storage capacities, using the average value of first difference as described in
The first oxygen content change rate in first measurement delay time, the first measurement delay time and first oxygen content are become
The product of rate is as first oxygen storage capacity.
Further, the second data computational submodule is used for according to the described second real-time oxygen storage capacity, is calculated described the
Two measurement delay times in the second oxygen storage capacity when, be specifically used for:
The second difference for calculating two adjacent the second real-time oxygen storage capacities, using the average value of second difference as described in
The second oxygen content change rate in second measurement delay time, the second measurement delay time and second oxygen content are become
The product of rate is as second oxygen storage capacity.
In the present embodiment, fully take into account the hysteresis characteristic of lambda sensor, using upstream and downstream lambda sensor delay parameter and
The oxygen storage capacity changed during carrying out predictive sensor delay for storing up the real-time oxygen storage capacity of oxygen in the beginning and end stage of oxygen process, has
Effect promotes the accuracy that ternary catalyzing unit oxygen storage capacity calculates.And it does not need to carry out any adjusting to engine, not need outer yet
Other devices are connect, there is preferable market application prospect.
It should be noted that the course of work of modules and submodule in the present embodiment, please refers to above-described embodiment
In respective description, details are not described herein.
Optionally, on the basis of the calculation method of above-mentioned ternary catalyzing unit oxygen storage capacity and the embodiment of device, the present invention
Another embodiment provide a kind of electronic equipment, comprising: memory and processor；
Wherein, the memory is for storing program；
Processor caller is simultaneously used for:
Obtain the real-time oxygen storage capacity in the ternary catalyzing unit storage oxygen process；
According to the real-time oxygen storage capacity, the first oxygen storage capacity in the first measurement delay time of upstream oxygen sensor is calculated
With the second oxygen storage capacity in the second measurement delay time of catalyst monitoring sensor；The upstream oxygen sensor is located at the ternary
The upstream of catalyst converter；The catalyst monitoring sensor is located at the downstream of the ternary catalyzing unit；
Obtain the third oxygen storage capacity that the catalyst monitoring sensor measurement obtains；
According to first oxygen storage capacity, second oxygen storage capacity and the third oxygen storage capacity, the ternary catalyzing unit is calculated
Oxygen storage capacity.
Further, the ternary catalyzing unit oxygen storage capacity=third oxygen storage capacity-second oxygen storage capacity+first storage
Oxygen amount.
Further, described according to the real-time oxygen storage capacity, it calculates in the first measurement delay time of upstream oxygen sensor
The first oxygen storage capacity and catalyst monitoring sensor second measurement delay time in the second oxygen storage capacity, comprising:
When the upstream oxygen sensor detects that excess air coefficient is greater than preset value, obtains the ternary catalyzing unit and open
Begin to store the first real-time oxygen storage capacity when oxygen；
According to the described first real-time oxygen storage capacity, the first oxygen storage capacity in the first measurement delay time is calculated；
When the catalyst monitoring sensor detects oxygen, second before the full oxygen of ternary catalyzing unit storage is obtained
Real-time oxygen storage capacity；The real-time oxygen storage capacity includes the described first real-time oxygen storage capacity and the second real-time oxygen storage capacity；
According to the described second real-time oxygen storage capacity, the second oxygen storage capacity in the second measurement delay time is calculated.
Further, described according to the described first real-time oxygen storage capacity, calculate first in the first measurement delay time
Oxygen storage capacity, comprising:
Calculate the first difference of two adjacent the first real-time oxygen storage capacities；
Using the average value of first difference as the first oxygen content change rate in the first measurement delay time；
Using the product of the first measurement delay time and the first oxygen content change rate as first oxygen storage capacity.
Further, described according to the described second real-time oxygen storage capacity, calculate second in the second measurement delay time
Oxygen storage capacity, comprising:
Calculate the second difference of two adjacent the second real-time oxygen storage capacities；
Using the average value of second difference as the second oxygen content change rate in the second measurement delay time；
Using the product of the second measurement delay time and the second oxygen content change rate as second oxygen storage capacity.
Further, the real-time oxygen storage capacityWherein, dmO2For oxygen quality flow value；
Wherein, dmO2For oxygen quality flow value；Dm Air is mass air flow value；C is constant, and λ is excess air
Coefficient.
In the present embodiment, the real-time oxygen storage capacity in the ternary catalyzing unit storage oxygen process is obtained, is then calculated upper
It swims the first oxygen storage capacity in the first measurement delay time of lambda sensor and measures delay time the second of catalyst monitoring sensor
The second interior oxygen storage capacity, the first oxygen storage capacity and the second oxygen storage capacity have been used when ternary catalyzing unit oxygen storage capacity is calculated.It is i.e. logical
The oxygen storage capacity of the invention estimated in upstream oxygen sensor and catalyst monitoring sensor measurement delay time is crossed, so that be calculated
The calculated value of ternary catalyzing unit oxygen storage capacity is more acurrate.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (13)
1. a kind of calculation method of ternary catalyzing unit oxygen storage capacity characterized by comprising
Obtain the real-time oxygen storage capacity in ternary catalyzing unit storage oxygen process；
According to the real-time oxygen storage capacity, calculate the first oxygen storage capacity in the first measurement delay time of upstream oxygen sensor and
The second oxygen storage capacity in second measurement delay time of catalyst monitoring sensor；The upstream oxygen sensor is located at the three-element catalytic
The upstream of device；The catalyst monitoring sensor is located at the downstream of the ternary catalyzing unit；
Obtain the third oxygen storage capacity that the catalyst monitoring sensor measurement obtains；
According to first oxygen storage capacity, second oxygen storage capacity and the third oxygen storage capacity, the ternary catalyzing unit storage oxygen is calculated
Amount.
2. calculation method according to claim 1, which is characterized in that the ternary catalyzing unit oxygen storage capacity=third storage
Oxygen amount-second oxygen storage capacity+first oxygen storage capacity.
3. calculation method according to claim 2, which is characterized in that it is described according to the real-time oxygen storage capacity, it calculates upper
It swims the first oxygen storage capacity in the first measurement delay time of lambda sensor and measures delay time the second of catalyst monitoring sensor
The second interior oxygen storage capacity, comprising:
When the upstream oxygen sensor detects that excess air coefficient is greater than preset value, obtains the ternary catalyzing unit and start to deposit
Store up the first real-time oxygen storage capacity when oxygen；
According to the described first real-time oxygen storage capacity, the first oxygen storage capacity in the first measurement delay time is calculated；
When the downstream oxygen sensor detects oxygen, obtains second before the ternary catalyzing unit stores full oxygen and store up in real time
Oxygen amount；The real-time oxygen storage capacity includes the described first real-time oxygen storage capacity and the second real-time oxygen storage capacity；
According to the described second real-time oxygen storage capacity, the second oxygen storage capacity in the second measurement delay time is calculated.
4. calculation method according to claim 3, which is characterized in that it is described according to the described first real-time oxygen storage capacity, it calculates
The first oxygen storage capacity in the first measurement delay time, comprising:
Calculate the first difference of two adjacent the first real-time oxygen storage capacities；
Using the average value of first difference as the first oxygen content change rate in the first measurement delay time；
Using the product of the first measurement delay time and the first oxygen content change rate as first oxygen storage capacity.
5. calculation method according to claim 3, which is characterized in that it is described according to the described second real-time oxygen storage capacity, it calculates
The second oxygen storage capacity in the second measurement delay time, comprising:
Calculate the second difference of two adjacent the second real-time oxygen storage capacities；
Using the average value of second difference as the second oxygen content change rate in the second measurement delay time；
Using the product of the second measurement delay time and the second oxygen content change rate as second oxygen storage capacity.
6. calculation method according to claim 4 or 5, which is characterized in that the real-time oxygen storage capacity
Wherein, dmO2For oxygen quality flow value；
Wherein, dmO2For oxygen quality flow value；DmAir is mass air flow value；C is constant, and λ is excess air coefficient.
7. a kind of computing device of ternary catalyzing unit oxygen storage capacity characterized by comprising
Oxygen storage capacity obtains module, for obtaining the real-time oxygen storage capacity in ternary catalyzing unit storage oxygen process；
First oxygen storage capacity computing module prolongs for according to the real-time oxygen storage capacity, calculating to measure the first of upstream oxygen sensor
When the time in the first oxygen storage capacity and catalyst monitoring sensor second measurement delay time in the second oxygen storage capacity；The upstream
Lambda sensor is located at the upstream of the ternary catalyzing unit；The catalyst monitoring sensor is located at the downstream of the ternary catalyzing unit；
Oxygen storage capacity obtains module, the third oxygen storage capacity obtained for obtaining the catalyst monitoring sensor measurement；
Second oxygen storage capacity computing module is used for according to first oxygen storage capacity, second oxygen storage capacity and the third oxygen storage capacity,
Calculate the ternary catalyzing unit oxygen storage capacity.
8. computing device according to claim 7, which is characterized in that the ternary catalyzing unit oxygen storage capacity=third storage
Oxygen amount-second oxygen storage capacity+first oxygen storage capacity.
9. computing device according to claim 8, which is characterized in that the first oxygen storage capacity computing module includes:
First data acquisition submodule, for when the upstream oxygen sensor detect excess air coefficient be greater than preset value when,
Obtain the first real-time oxygen storage capacity when the ternary catalyzing unit starts to store oxygen；
First data computational submodule, for according to the described first real-time oxygen storage capacity, calculating in the first measurement delay time
The first interior oxygen storage capacity；
Second data acquisition submodule, for obtaining the ternary catalyzing unit when the catalyst monitoring sensor detects oxygen
Store the second real-time oxygen storage capacity before full oxygen；The real-time oxygen storage capacity includes the described first real-time oxygen storage capacity and described second
Real-time oxygen storage capacity；
Second data computational submodule, for according to the described second real-time oxygen storage capacity, calculating in the second measurement delay time
The second interior oxygen storage capacity.
10. computing device according to claim 9, which is characterized in that the first data computational submodule is used for basis
The first real-time oxygen storage capacity is specifically used for when calculating the first oxygen storage capacity in the first measurement delay time:
The first difference for calculating two adjacent the first real-time oxygen storage capacities, using the average value of first difference as described first
The first oxygen content change rate in delay time is measured, by the first measurement delay time and the first oxygen content change rate
Product as first oxygen storage capacity.
11. computing device according to claim 9, which is characterized in that the second data computational submodule is used for basis
The second real-time oxygen storage capacity is specifically used for when calculating the second oxygen storage capacity in the second measurement delay time:
The second difference for calculating two adjacent the second real-time oxygen storage capacities, using the average value of second difference as described second
The second oxygen content change rate in delay time is measured, by the second measurement delay time and the second oxygen content change rate
Product as second oxygen storage capacity.
12. computing device described in 0 or 11 according to claim 1, which is characterized in that the real-time oxygen storage capacityWherein, dmO2For oxygen quality flow value；
Wherein, dmO2For oxygen quality flow value；DmAir is mass air flow value；C is constant, and λ is excess air coefficient.
13. a kind of electronic equipment characterized by comprising memory and processor；
Wherein, the memory is for storing program；
Processor caller is simultaneously used for:
Obtain the real-time oxygen storage capacity in the ternary catalyzing unit storage oxygen process；
According to the real-time oxygen storage capacity, calculate the first oxygen storage capacity in the first measurement delay time of upstream oxygen sensor and
The second oxygen storage capacity in second measurement delay time of catalyst monitoring sensor；The upstream oxygen sensor is located at the three-element catalytic
The upstream of device；The catalyst monitoring sensor is located at the downstream of the ternary catalyzing unit；
Obtain the third oxygen storage capacity that the catalyst monitoring sensor measurement obtains；
According to first oxygen storage capacity, second oxygen storage capacity and the third oxygen storage capacity, the ternary catalyzing unit storage oxygen is calculated
Amount.
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