CN110107387A - DPF system OBD method for diagnosing faults based on machine oil quality sensor - Google Patents
DPF system OBD method for diagnosing faults based on machine oil quality sensor Download PDFInfo
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- CN110107387A CN110107387A CN201910274294.XA CN201910274294A CN110107387A CN 110107387 A CN110107387 A CN 110107387A CN 201910274294 A CN201910274294 A CN 201910274294A CN 110107387 A CN110107387 A CN 110107387A
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- machine oil
- dpf
- oil quality
- soot
- quality sensor
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
The invention discloses the DPF system OBD method for diagnosing faults based on machine oil quality sensor, including machine oil quality sensor, soot signal processing unit, ECU, DPF differential pressure pickup and instrument board, the machine oil quality sensor is sent by electric signal to be connected with soot signal processing unit, and soot content is sent to ECU by the soot signal processing unit, and the DPF pressure sensor is electrically connected by ECU and instrument board.The DPF system OBD method for diagnosing faults based on machine oil quality sensor models DPF filtering accuracy algorithm by soot content in detection machine oil, the interference signal being subject to is few, levels of precision is high, in addition system constitutes simple, reduce false alarm probability, machine oil quality sensor is at low cost simultaneously, and current DPF system OBD fault diagnosis cost can be greatly reduced.
Description
Technical field
The present invention relates to automobile correlative technology fields, are suitable for diesel engine and after-treatment system, are specially based on machine
The DPF system OBD method for diagnosing faults of oil quality sensor.
Background technique
Develop general requirement according to national green, six stage emission regulation of state will be implemented, and DPF technology is to meet discharge
The key technology scheme of regulation, and the emission performance of vehicle is just directly affected after DPF breaks down, thus OBD system for
The diagnosis of DPF failure for vehicle discharge whether can continue it is up to standard play the role of it is vital.
Patent document 1 (CN 104747258) discloses a kind of DPF system OBD method for diagnosing faults, and this method passes through micro-
The data that control unit obtains sensor module, executor module and CAN communication module are analyzed, by comparing vehicle phase
With operating condition engine MAP, the DPF back pressure threshold value under the operating condition is judged, by comparing different times threshold value, determine DPF system
System whether there is failure.This scheme major defect: 1. vehicle majority is transient condition, relatively difficult for capturing identical operating condition,
Capture too short due to stablizing the time in time, precision not can guarantee；2. can not become in view of the performance of engine after aging
Change, precision is caused not can guarantee.
Patent document 2 (KR1020160167356) discloses a kind of fault diagnosis side OBD using NOx sensor
Method, this method major defect are that NOx sensor is at high cost, simultaneously because delivery temperature is high, there are wind for sensor reliability
Danger.
To solve the problems such as at high cost, precision is low present in current detection method, set about from principle, by machine oil
Soot in soot content estimating engine original row accurately judges DPF system failure to be associated with dpf regeneration.
The above problem is needed using automatically controlled targeting technology, by the way that different types of additive is stored in different spaces,
It is integrated on oil pan assembly later, in engine operation process, ECU is disappeared by acquisition oil temperature, engine oil capacity, fuel oil
The signals such as consumption, machine oil quality, by oil life prediction model analysis machine oil condition, according to depletion of additive situation, output
Electric signal, orientation enhancing machine oil performance, extends oil life.
Summary of the invention
The object of the present invention is to provide a kind of DPF system OBD method for diagnosing faults, pass through machine oil quality sensor detection machine
Soot content in oil, by machine oil soot content calculate engine original row in soot content, by comparison dpf regeneration number with
And DPF pressure sensor pressure difference, judge whether DPF system filter efficiency meets the requirements, if reduced value is higher than threshold value, then illustrates
DPF system is working properly, if reduced value is lower than threshold values, then illustrates that DPF system filter efficiency is too low, there are ablations and gas leakage to ask
Topic, triggering OBD alarm, solves DPF system OBD troubleshooting issue.
To achieve the above object, the present invention provides the following technical solutions the event of the DPF system OBD based on machine oil quality sensor
Hinder diagnostic method, including machine oil quality sensor, soot signal processing unit, ECU, DPF differential pressure pickup and instrument board, it is described
Machine oil quality sensor is sent by electric signal to be connected with soot signal processing unit, and the soot signal processing unit is by cigarette
Soot content is sent to ECU, and the DPF pressure sensor is electrically connected by ECU and instrument board.
Preferably, the ginseng such as dielectric constant, engine oil level, viscosity of the machine oil quality sensor detection engine inner engine oil
Number.
Preferably, the soot signal processing unit receiver oil quality sensor output signal, and by integrated
Machine oil quality signals are converted to soot cont signal by mathematical model, then signal is exported to ECU, and soot signal processing unit
It is integrated with ECU.
Preferably, the ECU is according to soot content balance DPF pressure sensor detected value and dpf regeneration signal, secondary
Number, judges DPF system filter efficiency.
It compared with prior art, the invention has the following advantages: should the DPF system based on machine oil quality sensor
OBD method for diagnosing faults models DPF filtering accuracy algorithm by soot content in detection machine oil, and the interference signal being subject to is few,
Levels of precision is high, and in addition system is constituted simple, reduces false alarm probability, while machine oil quality sensor is at low cost, can be substantially
Reduce current DPF system OBD fault diagnosis cost.
Detailed description of the invention
Fig. 1 is DPF system OBD fault diagnosis system working principle diagram of the present invention；
Fig. 2 is DPF system OBD fault diagnosis system process of the present invention.
In figure: 1, machine oil quality sensor, 2, soot signal processing unit, 3, ECU, 4, DPF differential pressure pickup, 5, instrument
Disk.
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 present invention provides a kind of technical solution referring to FIG. 1-2: the DPF system OBD failure based on machine oil quality sensor
Diagnostic method, including machine oil quality sensor 1, soot signal processing unit 2, ECU3, DPF differential pressure pickup 4 and instrument board 5,
Machine oil quality sensor 1 is sent by electric signal to be connected with soot signal processing unit 2, and soot signal processing unit 2 is by cigarette
Soot content is sent to ECU3, and DPF pressure sensor 4 is electrically connected by ECU3 and instrument board 5；
Machine oil quality sensor 1 detects the parameters such as dielectric constant, engine oil level, the viscosity of engine inner engine oil, later will
The dielectric constant signal detected is sent to soot signal processing unit 2；2 receiver oil quality of soot signal processing unit sensing
Device output signal, and machine oil quality signals are converted to by soot cont signal by integrated mathematical model, then signal is defeated
Out to ECU3, and soot signal processing unit 2 and ECU3 are integrated；ECU3 is detected according to soot content balance DPF pressure sensor 4
Value and dpf regeneration signal, number, after judging that DPF system filter efficiency, ECU3 receive soot cont signal, by integrated
Peg model perhaps soot signal is converted dpf regeneration number or DPF pressure difference by mathematical model, later with actual measurement
Dpf regeneration number or pressure difference are compared, when comparison result is lower than threshold values, output OBD fault-signal to instrument board 5,
Instrument board 5 reports OBD trouble light, reminds client DPF failure.
DPF system OBD fault diagnosis flow scheme: ECU3 power on and operational process in, detection machine oil quality sensor 1,
Whether 4 working condition of DPF differential pressure pickup is normal, such as abnormal output error code, while prompting OBD failure in instrument board 5；?
In operational process, ECU3 receives soot content value, while calculating dpf regeneration period, DPF system pressure difference by mathematical model, it
It is compared afterwards with dpf regeneration number and 4 return signal of DPF pressure sensor, if reduced value is higher than threshold value, then illustrates DPF
System is working properly, if reduced value is lower than threshold values, then illustrates that DPF system filter efficiency is too low, there are ablation and leakage problem,
Error code is exported, while prompting OBD failure in instrument board 5.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (4)
1. the DPF system OBD method for diagnosing faults based on machine oil quality sensor, including machine oil quality sensor (1), soot letter
Number processing unit (2), ECU (3), DPF differential pressure pickup (4) and instrument board (5), it is characterised in that: the machine oil quality sensing
Device (1) is sent by electric signal to be connected with soot signal processing unit (2), and the soot signal processing unit (2) is by soot
Content is sent to ECU (3), and the DPF pressure sensor (4) is electrically connected by ECU (3) and instrument board (5).
2. the DPF system OBD method for diagnosing faults according to claim 1 based on machine oil quality sensor, feature exist
In: the parameters such as described dielectric constant, engine oil level, viscosity of machine oil quality sensor (1) detection engine inner engine oil.
3. the DPF system OBD method for diagnosing faults according to claim 1 based on machine oil quality sensor, feature exist
In: soot signal processing unit (2) the receiver oil quality sensor output signal, and will by integrated mathematical model
Machine oil quality signals are converted to soot cont signal, then signal is exported to ECU (3), and soot signal processing unit (2) with
ECU (3) is integrated.
4. the DPF system OBD method for diagnosing faults according to claim 1 based on machine oil quality sensor, feature exist
In: the ECU (3) sentences according to soot content balance DPF pressure sensor (4) detected value and dpf regeneration signal, number
Disconnected DPF system filter efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274294.XA CN110107387A (en) | 2019-04-08 | 2019-04-08 | DPF system OBD method for diagnosing faults based on machine oil quality sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910274294.XA CN110107387A (en) | 2019-04-08 | 2019-04-08 | DPF system OBD method for diagnosing faults based on machine oil quality sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410189A (en) * | 2019-07-02 | 2019-11-05 | 一汽解放汽车有限公司 | Method for diagnosing faults, device, vehicle and the storage medium of diesel particulate filter |
| CN110988311A (en) * | 2019-10-15 | 2020-04-10 | 一汽解放汽车有限公司 | Vehicle engine oil life diagnosis method and device, vehicle and storage medium |
| CN111412050A (en) * | 2020-03-26 | 2020-07-14 | 安徽华菱汽车有限公司 | Automobile and error reporting method and system for simulating low DPF (diesel particulate filter) filtering efficiency of engine of automobile |
| WO2022060329A1 (en) * | 2020-09-17 | 2022-03-24 | Tofas Turk Otomobil Fabrikasi Anonim Sirketi | Device enabling the vehicles that cannot accelerate to high speeds to perform dpf regeneration in steady state |
-
2019
- 2019-04-08 CN CN201910274294.XA patent/CN110107387A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410189A (en) * | 2019-07-02 | 2019-11-05 | 一汽解放汽车有限公司 | Method for diagnosing faults, device, vehicle and the storage medium of diesel particulate filter |
| CN110410189B (en) * | 2019-07-02 | 2020-12-04 | 一汽解放汽车有限公司 | Fault diagnosis method and device for diesel particulate filter, vehicle and storage medium |
| CN110988311A (en) * | 2019-10-15 | 2020-04-10 | 一汽解放汽车有限公司 | Vehicle engine oil life diagnosis method and device, vehicle and storage medium |
| CN110988311B (en) * | 2019-10-15 | 2022-07-26 | 一汽解放汽车有限公司 | Vehicle oil life diagnosis method and device, vehicle and storage medium |
| CN111412050A (en) * | 2020-03-26 | 2020-07-14 | 安徽华菱汽车有限公司 | Automobile and error reporting method and system for simulating low DPF (diesel particulate filter) filtering efficiency of engine of automobile |
| CN111412050B (en) * | 2020-03-26 | 2021-10-22 | 安徽华菱汽车有限公司 | Automobile and error reporting method and system for simulating low DPF (diesel particulate filter) filtering efficiency of engine of automobile |
| WO2022060329A1 (en) * | 2020-09-17 | 2022-03-24 | Tofas Turk Otomobil Fabrikasi Anonim Sirketi | Device enabling the vehicles that cannot accelerate to high speeds to perform dpf regeneration in steady state |
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Application publication date: 20190809 |