CN110410189A - Method for diagnosing faults, device, vehicle and the storage medium of diesel particulate filter - Google Patents
Method for diagnosing faults, device, vehicle and the storage medium of diesel particulate filter Download PDFInfo
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- CN110410189A CN110410189A CN201910589078.4A CN201910589078A CN110410189A CN 110410189 A CN110410189 A CN 110410189A CN 201910589078 A CN201910589078 A CN 201910589078A CN 110410189 A CN110410189 A CN 110410189A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000003860 storage Methods 0.000 title claims abstract description 14
- 239000004071 soot Substances 0.000 claims abstract description 180
- 239000010721 machine oil Substances 0.000 claims abstract description 92
- 238000001514 detection method Methods 0.000 claims abstract description 71
- 239000010705 motor oil Substances 0.000 claims abstract description 33
- 238000003745 diagnosis Methods 0.000 claims abstract description 32
- 230000008929 regeneration Effects 0.000 claims description 28
- 238000011069 regeneration method Methods 0.000 claims description 28
- 230000015654 memory Effects 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 14
- 239000003921 oil Substances 0.000 claims description 8
- 230000009466 transformation Effects 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 230000008450 motivation Effects 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 238000001914 filtration Methods 0.000 description 6
- 238000013136 deep learning model Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013135 deep learning Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- 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)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The embodiment of the invention discloses a kind of method for diagnosing faults of diesel particulate filter, device, vehicle and storage mediums.This method comprises: obtaining the detection parameters information of diesel particulate filter, determine the machine oil soot content of engine inner engine oil, according to the machine oil soot content, determine the practical soot content in the diesel particulate filter, according to the detection parameters information and practical soot content, fault diagnosis is carried out to the diesel particulate filter, obtains diagnostic result.Compared with prior art, the embodiment of the present invention determines the practical soot content in diesel particulate filter according to the machine oil soot content of engine inner engine oil indirectly, and then fault diagnosis is completed according to practical soot content, the prior art is solved using the front and back pressure difference of carbon lambda sensor detection DPF, and then fault diagnosis is carried out according to front and back pressure difference, lead to the problem that diagnostic accuracy is lower.
Description
Technical field
The present embodiments relate to fault diagnosis technology field more particularly to a kind of fault diagnosises of diesel particulate filter
Method, apparatus, vehicle and storage medium.
Background technique
Soot dust granule is one of most important pollutant in exhaust emissions of diesel engine, diesel particulate filter (Diesel
Particulate Filter, DPF) it is to be used to reduce diesel engine soot dust granule at present to discharge relatively effective equipment.With making
With the extension of time, DPF is easy failure, can not filtering smoke particle so that soot dust granule is discharged into atmosphere pollute environment,
And then influence the emission performance of vehicle.
In order to detect DPF with the presence or absence of the failure of failure, the prior art mainly utilizes the front and back of carbon lambda sensor detection DPF
Pressure difference, and be compared with empirical value, judge DPF with the presence or absence of failure.Carbon lambda sensor used in this mode it is at high cost,
Reliability is low, and will test value and empirical value is compared, so that the accuracy of judging result is lower.
Summary of the invention
The embodiment of the present invention provides method for diagnosing faults, device, vehicle and the storage medium of a kind of diesel particulate filter,
To improve diagnostic accuracy.
In a first aspect, the embodiment of the present invention provides a kind of method for diagnosing faults of diesel particulate filter, comprising:
The detection parameters information of diesel particulate filter is obtained, the detection parameters information includes detection regeneration times or inspection
Survey pressure difference；
Determine the machine oil soot content of engine inner engine oil；
According to the machine oil soot content, the practical soot content in the diesel particulate filter is determined；
According to the detection parameters information and practical soot content, fault diagnosis is carried out to the diesel particulate filter,
Obtain diagnostic result.
Second aspect, the embodiment of the present invention also provide a kind of trouble-shooter of diesel particulate filter, the device packet
It includes:
Data obtaining module, for obtaining the detection parameters information of diesel particulate filter, the detection parameters packet
Include detection regeneration times or detection pressure difference；
Machine oil soot content determining module, for determining the machine oil soot content of engine inner engine oil；
Practical soot content determining module, for determining the diesel particulate filter according to the machine oil soot content
Interior practical soot content；
Fault diagnosis module is used for according to the detection parameters information and practical soot content, to the diesel particulate mistake
Filter carries out fault diagnosis, obtains diagnostic result.
The third aspect, the embodiment of the present invention also provide a kind of vehicle, comprising: diesel particulate filter and engine also wrap
It includes:
Thermoacoustic prime engine device；
Differential pressure pickup is sent to the row for detecting the pressure difference of the diesel particulate filter, and by the pressure difference
Vehicle controller；
Machine oil quality sensor is sent out for detecting the dielectric constant of the engine inner engine oil, and by the dielectric constant
Give the thermoacoustic prime engine device；
Instrument board, for alarming when the diesel particulate filter breaks down；
Memory, for storing one or more programs；
When one or more of programs are executed by the thermoacoustic prime engine device, so that the thermoacoustic prime engine device realizes such as the
The method for diagnosing faults of diesel particulate filter described in one side.
Fourth aspect, the embodiment of the present invention also provide a kind of storage medium, are stored thereon with computer program, the program quilt
The method for diagnosing faults of diesel particulate filter as described in relation to the first aspect is realized when thermoacoustic prime engine device executes.
The embodiment of the present invention provides method for diagnosing faults, device, vehicle and the storage medium of a kind of diesel particulate filter,
By obtaining the detection parameters information of diesel particulate filter, the machine oil soot content of engine inner engine oil is determined, according to described
Machine oil soot content determines the practical soot content in the diesel particulate filter, according to the detection parameters information and reality
Border soot content carries out fault diagnosis to the diesel particulate filter, obtains diagnostic result.Compared with prior art, this hair
Bright embodiment determines the practical soot content in diesel particulate filter according to the machine oil soot content of engine inner engine oil indirectly,
And then fault diagnosis is completed according to practical soot content, it solves the prior art and is pressed using the front and back of carbon lambda sensor detection DPF
Difference, and then fault diagnosis is carried out according to front and back pressure difference, lead to the problem that diagnostic accuracy is lower.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the method for diagnosing faults for diesel particulate filter that the embodiment of the present invention one provides；
Fig. 2 is a kind of flow chart of the method for diagnosing faults of diesel particulate filter provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of structure chart of the trouble-shooter for diesel particulate filter that the embodiment of the present invention three provides；
Fig. 4 is a kind of structure chart for vehicle that the embodiment of the present invention four provides.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.In addition, in the absence of conflict, this
The feature in embodiment and embodiment in invention can be combined with each other.
Embodiment one
Fig. 1 is a kind of flow chart of the method for diagnosing faults for diesel particulate filter that the embodiment of the present invention one provides, this
Embodiment is applicable to the fault diagnosis situation of diesel particulate filter, and this method can be examined by the failure of diesel particulate filter
Disconnected device executes, which can be realized by way of software and/or hardware, and it is integrated in the car, specifically, the party
Method includes the following steps:
S110, the detection parameters information for obtaining diesel particulate filter.
Wherein, the detection parameters information includes detection regeneration times or detection pressure difference.Diesel particulate filter, also referred to as
Diesel particulate traps, the ceramic filter being mounted in diesel engine emissions system, for capturing the particle in exhaust,
It prevents it from entering atmosphere, pollutes environment.Diesel particulate filter mainly has time, full and regeneration three phases, wherein the empty stage is
Refer to that the particle in diesel particulate filter is less, inside does not block, and will not influence the initial stage of engine work.It is full
Stage refers to the progress with collection work, and the particle in diesel particulate filter is more and more, and internal pressure is increasing,
Lead to the raising of exhausting waste gas resistance, the intermediate stage that the oil consumption of engine and power are severely impacted.When the oil consumption of engine
When being severely impacted with power, needs to carry out the particle in diesel particulate filter cleaning reduction work, bavin will be collected at
Carbon soot particles in oil particles filter are disposed by high temperature or other modes, restore the filtering energy of diesel particulate filter
Power, this process are known as the regeneration of diesel particulate filter.Specifically, when detecting that the front and back pressure difference of diesel particulate filter reaches
When to setting value, needs to control diesel particulate filter (DPF) regeneration, therefore the number of processes of detection carbon soot particles can be passed through, determine
Regeneration times, as detection regeneration times.Detection pressure difference is the front and back pressure difference of diesel particulate filter, can pass through pressure difference sensing
Device detection, embodiment is to the type and model of differential pressure pickup without limiting.
S120, the machine oil soot content for determining engine inner engine oil.
Machine oil soot content is the soot content entered in machine oil after engine generates.In actual application, engine
Soot a part of generation enters machine oil, and a part enters diesel particulate filter, into the soot content and entrance in machine oil
Soot content in diesel particulate filter has certain incidence relation.In view of the prior art is examined using carbon lambda sensor
The front and back pressure difference of diesel particulate filter is surveyed, and the front and back pressure difference that will test is compared with the pressure difference measured in the past, to sentence
Whether disconnected diesel particulate filter fails.Since the reliability of carbon lambda sensor is lower, so that the front and back that carbon lambda sensor measures
Soot content in pressure difference and diesel particulate filter has certain deviation, in addition the pressure difference that previous experiences measure is also by pressing
Gap sensor measures, and further reduced the accuracy of diagnostic result.
For this purpose, embodiment first determine engine inner engine oil machine oil soot content, be combined into machine oil soot content and
Into the incidence relation of the soot content of diesel particulate filter, the soot content for entering diesel particulate filter is determined, in turn
According to the soot content for entering diesel particulate filter, fault diagnosis is carried out to diesel particulate filter, improves diagnostic result
Accuracy.It is understood that will affect the dielectric constant of machine oil into the soot of machine oil, therefore can be detected by sensor
Then the dielectric constant of machine oil determines the soot content for entering machine oil according to dielectric constant, embodiment is to detection dielectric constant
The type and model of sensor optionally, can choose fluid behaviour sensor (Fluid Property without limiting
Sensor, FPS).Illustratively, dielectric constant can be inputted to predetermined soot content model, by soot content model
Export soot content, wherein soot content model can be deep learning model, be also possible to reflect that dielectric constant and soot contain
The mathematical model of magnitude relation, embodiment without limiting, enter soot content model as long as can determine according to dielectric constant
The soot content of machine oil.
S130, according to the machine oil soot content, determine the practical soot content in the diesel particulate filter.
Practical soot content is to actually enter the soot content of diesel particulate filter, since the soot entered in machine oil contains
Amount and the soot content entered in diesel particulate filter have certain incidence relation, therefore, according to the incidence relation and
Machine oil soot content can determine the soot content for actually entering diesel particulate filter, provide foundation for fault diagnosis.
S140, according to the detection parameters information and practical soot content, failure is carried out to the diesel particulate filter
Diagnosis, obtains diagnostic result.
It is related into the soot content of diesel particulate filter and the front and back pressure difference and regeneration times of diesel particulate filter,
Soot content into diesel particulate filter is more, and the front and back pressure difference of diesel particulate filter is bigger, and when front and back, pressure difference reaches
When certain setting value, diesel particulate filter (DPF) regeneration is primary.Therefore, according to practical soot content and front and back pressure difference, or according to reality
Soot content and regeneration times can carry out fault diagnosis to diesel particulate filter.It optionally, can be with for the ease of comparing
Practical soot content is converted into corresponding pressure difference or regeneration times, embodiment to conversion regime without limiting, such as can be with
Practical soot content is converted into corresponding pressure difference or regeneration times by the transformation model of setting.
Specifically, by taking pressure difference as an example, if the front and back pressure difference of the diesel particulate filter of differential pressure pickup detection is less than reality
The pressure difference of calculating shows that diesel particulate filter breaks down, can not particle in effective filtering exhaust, cause it to enter big
Gas pollutes environment, and otherwise, diesel particulate filter is normal.Compared with prior art, the present embodiment is according to machine oil soot content,
It determines the soot content for actually entering diesel particulate filter, and then judges that diesel particulate filter is according to practical soot content
It is no faulty, the problem of experience measures poor accuracy caused by the front and back pressure difference of diesel particulate filter is avoided, is not only event
Barrier diagnosis provides a kind of higher judgment criteria of accuracy, while the soot that can also be understood into diesel particulate filter contains
Amount.
The embodiment of the present invention one provides a kind of method for diagnosing faults of diesel particulate filter, by obtaining diesel particulate mistake
The detection parameters information of filter determines that the machine oil soot content of engine inner engine oil determines institute according to the machine oil soot content
The practical soot content in diesel particulate filter is stated, according to the detection parameters information and practical soot content, to the bavin
Oil particles filter carries out fault diagnosis, obtains diagnostic result.Compared with prior art, the embodiment of the present invention is according in engine
The machine oil soot content of machine oil determines the practical soot content in diesel particulate filter indirectly, and then according to practical soot content
Complete fault diagnosis, solve the prior art using carbon lambda sensor detection DPF front and back pressure difference, and then according to front and back pressure difference into
Row fault diagnosis leads to the problem that diagnostic accuracy is lower.
Embodiment two
Fig. 2 is a kind of flow chart of the method for diagnosing faults of diesel particulate filter provided by Embodiment 2 of the present invention, this
Embodiment is to be embodied on the basis of the above embodiments, and this method comprises the following steps:
S210, the detection parameters information for obtaining diesel particulate filter.
S220, the dielectric constant for obtaining the engine inner engine oil that machine oil quality sensor detects.
Specifically, the present embodiment is passed using the dielectric constant of machine oil quality sensor detection engine inner engine oil with carbon oxygen
Sensor is compared, and machine oil quality sensor can reduce cost.
S230, according to the dielectric constant, determine the machine oil soot content of the engine inner engine oil.
Dielectric constant and machine oil soot content have certain incidence relation, which can first pass through a large amount of realities in advance
Acquisition is tested, embodiment is to the form of incidence relation without limiting.It can determine and start according to the incidence relation and dielectric constant
The machine oil soot content of machine inner engine oil.Specifically, machine oil soot content can be determined as follows:
The dielectric constant is inputted into preset soot content model, soot content is exported by the soot content model,
Machine oil soot content as the engine inner engine oil.
Soot content model is predetermined, and for determining the model of machine oil soot content, can be mathematic(al) representation,
It is also possible to deep learning model, embodiment is to this without limiting.Specifically, if soot content model is mathematic(al) representation,
Dielectric constant, which is substituted into the mathematic(al) representation, can be obtained corresponding machine oil soot content, if soot content model is deep learning
Dielectric constant is inputted trained deep learning model in advance, is exported by deep learning model as a result, as oil smoke by model
Soot content.Optionally, the soot content model in embodiment is the mathematic(al) representation shaped like y=ax+b, and a and b is constant in formula,
X is dielectric constant, and y is machine oil soot content.
S240, the incidence relation for obtaining soot content in the machine oil soot content and the diesel particulate filter.
Soot a part that engine generates enters machine oil, and a part enters diesel particulate filter, into machine oil and into
It is related with the model of engine and the course of work to enter the ratio of diesel particulate filter, it is assumed that account for engine into the part of machine oil
Former scheduled production it is raw 1%, account for raw 99% of engine original scheduled production into the part of diesel particulate filter, then machine oil soot content with
The incidence relation of soot content is 1:9 in diesel particulate filter.
S250, according to the incidence relation and the machine oil soot content, determine the reality in the diesel particulate filter
Border soot content.
It can determine that the practical soot in diesel particulate filter contains according to incidence relation and the machine oil soot content determined
Amount.Illustratively, machine oil soot content is 2g, and the association of the soot content in machine oil soot content and diesel particulate filter is closed
System is 1:9, then can determine that the practical soot content in diesel particulate filter is 18g.
S260, according to preset soot content transformation model, the practical soot content is converted into the diesel particulate
The actual pressure differential or actual reproduction number of filter.
Soot content transformation model be used for by the practical soot content in diesel particulate filter be converted to actual pressure differential or
Actual reproduction number, so as to actual measurement pressure difference or regeneration times be compared, determine diagnostic result.Embodiment is to soot
Content transformation model is without limiting, and optionally, soot content transformation model is shaped like y=mx2The mathematic(al) representation of+nx+p,
Wherein, m, n and p are constant, and x is practical soot content, and y is actual pressure differential.Actual reproduction number can be true according to actual pressure differential
Fixed, when actual pressure differential is greater than the set value, otherwise regeneration times 1 are 0.
Detection pressure difference and the actual pressure differential or the detection regeneration times described in S270, comparison and the reality are again
Raw number.
Compare detection pressure difference and actual pressure differential, or compare detection regeneration times and actual reproduction number, is tied according to comparing
Fruit can determine whether diesel particulate filter is faulty.Specifically, if detection pressure difference is less than actual pressure differential, or detection is again
Raw number is less than actual reproduction number, then it represents that diesel particulate filter is faulty, otherwise, is indicating diesel particulate filter just
Often.
Whether S280, the detection pressure difference are less than the actual pressure differential or whether the detection regeneration times are less than institute
Actual reproduction number is stated, if so, executing S290, otherwise, executes S2100.
S290, determining the diesel particulate filter, there are failures, and alarm.
If detecting, pressure difference is less than actual pressure differential or detection regeneration times are less than actual reproduction number, indicates diesel particulate filtering
There are failures for device, optionally, fault-signal can be sent to instrument board, be alarmed by instrument board, to prompt user's diesel oil
Grain filter breaks down.
S2100, determine that the diesel particulate filter does not have failure.
If detecting, pressure difference is greater than or equal to actual pressure differential or detection regeneration times are greater than or equal to actual reproduction number, indicates
Diesel particulate filter is normal.
Second embodiment of the present invention provides a kind of method for diagnosing faults of diesel particulate filter, on the basis of above-described embodiment
On, machine oil soot content is determined according to the dielectric constant of engine inner engine oil, according to machine oil soot content and enters diesel particulate
The incidence relation of the soot content of filter determines the soot content for actually entering diesel particulate filter, and then according to reality
The pressure difference or regeneration times of soot content combination actual measurement carry out fault diagnosis to diesel particulate filter, both reduce into
This, and improve diagnostic accuracy.
Embodiment three
Fig. 3 is a kind of structure chart of the trouble-shooter for diesel particulate filter that the embodiment of the present invention three provides, should
Device can execute the method for diagnosing faults of diesel particulate filter described in above-described embodiment, specifically, the device includes:
Data obtaining module 310, for obtaining the detection parameters information of diesel particulate filter, the detection parameters information
Including detection regeneration times or detection pressure difference；
Machine oil soot content determining module 320, for determining the machine oil soot content of engine inner engine oil；
Practical soot content determining module 330, for determining the diesel particulate filtering according to the machine oil soot content
Practical soot content in device；
Fault diagnosis module 340 is used for according to the detection parameters information and practical soot content, to the diesel particulate
Filter carries out fault diagnosis, obtains diagnostic result.
The embodiment of the present invention three provides a kind of trouble-shooter of diesel particulate filter, by obtaining diesel particulate mistake
The detection parameters information of filter determines that the machine oil soot content of engine inner engine oil determines institute according to the machine oil soot content
The practical soot content in diesel particulate filter is stated, according to the detection parameters information and practical soot content, to the bavin
Oil particles filter carries out fault diagnosis, obtains diagnostic result.Compared with prior art, the embodiment of the present invention is according in engine
The machine oil soot content of machine oil determines the practical soot content in diesel particulate filter indirectly, and then according to practical soot content
Complete fault diagnosis, solve the prior art using carbon lambda sensor detection DPF front and back pressure difference, and then according to front and back pressure difference into
Row fault diagnosis leads to the problem that diagnostic accuracy is lower.
On the basis of the above embodiments, machine oil soot content determining module 320, comprising:
Dielectric constant acquiring unit, it is normal for obtaining the dielectric of the engine inner engine oil of machine oil quality sensor detection
Number；
Machine oil soot content determination unit, for determining the machine oil of the engine inner engine oil according to the dielectric constant
Soot content.
On the basis of the above embodiments, machine oil soot content determination unit, specifically for inputting the dielectric constant
Preset soot content model exports soot content by the soot content model, the machine oil as the engine inner engine oil
Soot content.
On the basis of the above embodiments, practical soot content determining module 330, comprising:
Incidence relation acquiring unit contains for obtaining soot in the machine oil soot content and the diesel particulate filter
The incidence relation of amount；
Practical soot content determination unit, described in determining according to the incidence relation and the machine oil soot content
Practical soot content in diesel particulate filter.
On the basis of the above embodiments, fault diagnosis module 340, comprising:
Conversion module, for the practical soot content being converted to described according to preset soot content transformation model
The actual pressure differential or actual reproduction number of diesel particulate filter；
Comparison module, for the detection pressure difference and the actual pressure differential or the detection regeneration times and institute
State actual reproduction number；
Judgment module, if small less than the actual pressure differential or the detection regeneration times for the detection pressure difference
In the actual reproduction number, determine that there are failures for the diesel particulate filter, and alarm.
The trouble-shooter for the diesel particulate filter that the embodiment of the present invention three provides can be used for executing above-mentioned implementation
The method for diagnosing faults for the diesel particulate filter that example provides, has corresponding function and beneficial effect.
Example IV
Fig. 4 is a kind of structure chart for vehicle that the embodiment of the present invention four provides, specifically, with reference to Fig. 4, which includes:
Thermoacoustic prime engine device 410, memory 420, differential pressure pickup 430, machine oil quality sensor 440, diesel particulate filter 450, hair
Motivation 460 and instrument board 470, vehicle middle rolling car controller 410, memory 420, differential pressure pickup 430, machine oil quality sensor
440, diesel particulate filter 450, engine 460 and instrument board 470 can be connected by bus or other modes, in Fig. 4 with
For being connected by bus.Wherein, differential pressure pickup 430, for detecting the pressure difference of diesel particulate filter 450, and by pressure difference
It is sent to thermoacoustic prime engine device 410.Machine oil quality sensor 440, for detecting the dielectric constant of 460 inner engine oil of engine, and will
Dielectric constant is sent to thermoacoustic prime engine device 410.Instrument board 470, for carrying out when diesel particulate filter 450 breaks down
Alarm.Diesel particulate filter 450, for particles such as soots in filtering exhaust.
Memory 420 is used as a kind of computer readable storage medium, can be used for storing software program, journey can be performed in computer
Sequence and module, such as the corresponding program instruction/module of the method for diagnosing faults of the diesel particulate filter in the embodiment of the present invention.
Software program, instruction and the module that thermoacoustic prime engine device 410 is stored in memory 420 by operation, thereby executing vehicle
Various function application and data processing, the i.e. method for diagnosing faults of the diesel particulate filter of realization above-described embodiment.
Memory 420 mainly includes storing program area and storage data area, wherein storing program area can store operation system
Application program needed for system, at least one function；Storage data area, which can be stored, uses created data etc. according to terminal.This
Outside, memory 420 may include high-speed random access memory, can also include nonvolatile memory, for example, at least one
Disk memory, flush memory device or other non-volatile solid state memory parts.In some instances, memory 420 can be into one
Step includes the memory remotely located relative to thermoacoustic prime engine device 410, these remote memories can pass through network connection to vehicle
.The example of above-mentioned network includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
The fault diagnosis side of vehicle and diesel particulate filter provided by the above embodiment that the embodiment of the present invention four provides
It is owned by France in same inventive concept, the technical detail of detailed description not can be found in above-described embodiment, and this reality in the present embodiment
It applies example and has the identical beneficial effect of method for diagnosing faults for executing diesel particulate filter.
Embodiment five
The embodiment of the present invention five also provides a kind of storage medium, is stored thereon with computer program, which is controlled by driving
Device processed realizes the method for diagnosing faults of diesel particulate filter as described in the above embodiment the present invention when executing.
Certainly, a kind of storage medium comprising computer executable instructions, computer provided by the embodiment of the present invention
Operation in the method for diagnosing faults for the diesel particulate filter that executable instruction is not limited to the described above, can also be performed this hair
Relevant operation in the method for diagnosing faults of diesel particulate filter provided by bright embodiment, and have corresponding function and have
Beneficial effect.
By the description above with respect to embodiment, it is apparent to those skilled in the art that, the present invention
It can be realized by software and required common hardware, naturally it is also possible to which by hardware realization, but in many cases, the former is more
Good embodiment.Based on this understanding, technical solution of the present invention substantially in other words contributes to the prior art
Part can be embodied in the form of software products, which can store in computer readable storage medium
In, floppy disk, read-only memory (Read-Only Memory, ROM), random access memory (Random such as computer
Access Memory, RAM), flash memory (FLASH), hard disk or CD etc., including some instructions are with so that a computer is set
Standby (can be robot, personal computer, server or the network equipment etc.) executes bavin described in each embodiment of the present invention
The method for diagnosing faults of oil particles filter.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of method for diagnosing faults of diesel particulate filter characterized by comprising
The detection parameters information of diesel particulate filter is obtained, the detection parameters information includes detection regeneration times or detection pressure
Difference；
Determine the machine oil soot content of engine inner engine oil；
According to the machine oil soot content, the practical soot content in the diesel particulate filter is determined；
According to the detection parameters information and practical soot content, fault diagnosis is carried out to the diesel particulate filter, is obtained
Diagnostic result.
2. the method according to claim 1, wherein the machine oil soot content of the determining engine inner engine oil,
Include:
Obtain the dielectric constant of the engine inner engine oil of machine oil quality sensor detection；
According to the dielectric constant, the machine oil soot content of the engine inner engine oil is determined.
3. according to the method described in claim 2, determining the engine it is characterized in that, described according to the dielectric constant
The machine oil soot content of inner engine oil, comprising:
The dielectric constant is inputted into preset soot content model, soot content is exported by the soot content model, as
The machine oil soot content of the engine inner engine oil.
4. determining the bavin the method according to claim 1, wherein described according to the machine oil soot content
Practical soot content in oil particles filter, comprising:
Obtain the incidence relation of soot content in the machine oil soot content and the diesel particulate filter；
According to the incidence relation and the machine oil soot content, determine that the practical soot in the diesel particulate filter contains
Amount.
5. the method according to claim 1, wherein described contain according to the detection parameters information and practical soot
Amount carries out fault diagnosis to the diesel particulate filter, obtains diagnostic result, comprising:
According to preset soot content transformation model, the practical soot content is converted to the reality of the diesel particulate filter
Border pressure difference or actual reproduction number；
Compare the detection pressure difference and the actual pressure differential or the detection regeneration times and the actual reproduction number；
If the detection pressure difference is less than the actual pressure differential or the detection regeneration times are less than the actual reproduction time
Number, determines that there are failures for the diesel particulate filter, and alarm.
6. a kind of trouble-shooter of diesel particulate filter characterized by comprising
Data obtaining module, for obtaining the detection parameters information of diesel particulate filter, the detection parameters information includes inspection
Survey regeneration times or detection pressure difference；
Machine oil soot content determining module, for determining the machine oil soot content of engine inner engine oil；
Practical soot content determining module, for determining in the diesel particulate filter according to the machine oil soot content
Practical soot content；
Fault diagnosis module is used for according to the detection parameters information and practical soot content, to the diesel particulate filter
Fault diagnosis is carried out, diagnostic result is obtained.
7. device according to claim 6, which is characterized in that the machine oil soot content determining module, comprising:
Dielectric constant acquiring unit, the dielectric constant of the engine inner engine oil for obtaining the detection of machine oil quality sensor；
Machine oil soot content determination unit, for determining the machine oil soot of the engine inner engine oil according to the dielectric constant
Content.
8. device according to claim 7, which is characterized in that the machine oil soot content determination unit, being specifically used for will
The dielectric constant inputs preset soot content model, soot content is exported by the soot content model, as the hair
The machine oil soot content of motivation inner engine oil.
9. a kind of vehicle, comprising: diesel particulate filter and engine, which is characterized in that further include:
Thermoacoustic prime engine device；
The pressure difference for detecting the pressure difference of the diesel particulate filter, and is sent to the driving and controlled by differential pressure pickup
Device processed；
Machine oil quality sensor is sent to for detecting the dielectric constant of the engine inner engine oil, and by the dielectric constant
The thermoacoustic prime engine device；
Instrument board, for alarming when the diesel particulate filter breaks down；
Memory, for storing one or more programs；
When one or more of programs are executed by the thermoacoustic prime engine device, so that the thermoacoustic prime engine device is realized as right is wanted
Seek the method for diagnosing faults of diesel particulate filter described in any one of 1-5.
10. a kind of storage medium, is stored thereon with computer program, which is characterized in that when the program is executed by thermoacoustic prime engine device
Realize the method for diagnosing faults of diesel particulate filter according to any one of claims 1 to 5.
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