CN107676158A - The method for diagnosing faults and device of triple mode catalytic converter - Google Patents
The method for diagnosing faults and device of triple mode catalytic converter Download PDFInfo
- Publication number
- CN107676158A CN107676158A CN201710847237.7A CN201710847237A CN107676158A CN 107676158 A CN107676158 A CN 107676158A CN 201710847237 A CN201710847237 A CN 201710847237A CN 107676158 A CN107676158 A CN 107676158A
- Authority
- CN
- China
- Prior art keywords
- simulation
- amplitude
- oxygen sensor
- voltage signal
- catalytic converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0416—Methods of control or diagnosing using the state of a sensor, e.g. of an exhaust gas sensor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention provides a kind of method for diagnosing faults and device of triple mode catalytic converter, wherein, method for diagnosing faults comprises the following steps：1) control signal and charge flow rate caused by lambda sensor before obtaining；2) control signal and charge flow rate are based on, carries out simulation calculating, obtains simulation oxygen sensor voltage signal；3) according to the simulation oxygen sensor voltage signal, calculate and obtain simulation lambda sensor amplitude；4) voltage signal caused by post oxygen sensor is obtained；5) actual measurement post oxygen sensor amplitude is calculated according to the voltage signal of the post oxygen sensor；6) based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude, diagnose whether the triple mode catalytic converter breaks down.
Description
Technical field
The present invention relates to field of automobile, especially, is related to a kind of fault diagnosis side of triple mode catalytic converter
Method and device.
Background technology
Ternary catalyzing unit is mounted in most important outer purifier in automobile exhaust system, and it can be by vehicle exhaust
The pernicious gases such as CO (carbon monoxide), HC (hydrocarbon) and the NOx (nitrogen oxides) of discharge pass through oxidation and reduction
It is changed into harmless carbon dioxide, water and nitrogen, with the purpose for reaching cleaning of off-gas, reducing pollution.
The ternary catalyzing unit of vehicle during normal use can progressively cracking, can not finally carry out three-element catalytic conversion,
So that it cannot it meet the requirement of national Abgasgesetz.In addition, vehicle loses in advance because improper use will also result in catalyst converter
Effect, so as to cause tail gas exceeded.Therefore, control unit of engine is needed with three-element catalytic transition zone monitoring function, with timely
It was found that the failure of triple mode catalytic converter, so as to ensure that triple mode catalytic converter has higher purification efficiency all the time.
The method detected to the catalyzed conversion ability of ternary catalyzing unit has a variety of, and HC emissions directly can be entered
Row monitoring, this method need to use the sensor that can directly monitor HC emissions content, but due to it is with high costs,
The problems such as reliability is not high enough to, what is used at present is few.
The content of the invention
In view of this, it is an object of the invention to provide a kind of event for the triple mode catalytic converter that cost is low, reliability is high
Hinder diagnostic method and device and equipment.
In order to solve the above technical problems, one aspect of the present invention provides a kind of fault diagnosis side of triple mode catalytic converter
Method.
The method for diagnosing faults of triple mode catalytic converter according to embodiments of the present invention, comprises the following steps：
1) control signal and charge flow rate caused by lambda sensor before obtaining；
2) control signal and charge flow rate are based on, carries out simulation calculating, obtains simulation oxygen sensor voltage signal；
3) according to the simulation oxygen sensor voltage signal, calculate and obtain simulation lambda sensor amplitude；
4) voltage signal caused by post oxygen sensor is obtained；
5) actual measurement post oxygen sensor amplitude is calculated according to the voltage signal of the post oxygen sensor；
6) based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude, the three-element catalytic conversion is diagnosed
Whether device breaks down.
According to some embodiments of the present invention, the step 2) can be：The triple mode catalytic converter is replaced with pre-
Fixed cracking catalysis device, calculated in the case of the control signal of the preceding lambda sensor and charge flow rate and pass through the cracking
Deserved voltage signal after catalyst converter conversion, using the voltage signal as simulation oxygen sensor voltage signal.
According to some embodiments of the present invention, the step 6) includes following sub-step：
The average value of the simulation sample sensor amplitude and the actual measurement downstream oxygen in certain period of time 6-1) are calculated respectively
Sensor amplitude average value；
6-2) average value of the simulation lambda sensor amplitude and the actual measurement post oxygen sensor mean value of amplitude are carried out
Compare, when the actual measurement post oxygen sensor mean value of amplitude is more than the average value of the simulation lambda sensor amplitude, be diagnosed as
The triple mode catalytic converter failure.
According to some embodiments of the present invention, the step 6) also includes following sub-step：
6-3) when being diagnosed as the triple mode catalytic converter failure, then engine failure lamp is lighted.
Further, according to some embodiments of the present invention, in sub-step 6-3) in, circulation diagnostic process is carried out, when predetermined
In circular treatment diagnostic process number, the number for being diagnosed as the triple mode catalytic converter failure exceedes threshold value, then lights and start
Machine trouble light.
According to another aspect of the present invention, a kind of trouble-shooter of triple mode catalytic converter is additionally provided.
The trouble-shooter of triple mode catalytic converter according to embodiments of the present invention, including：
First acquisition module, with control signal and charge flow rate caused by lambda sensor before acquisition；
Simulation calculation module, based on the control signal and charge flow rate, to carry out simulation calculating, obtain simulation oxygen and pass
Sensor voltage signal；
First magnitude determinations module, according to the simulation oxygen sensor voltage signal, to calculate and obtain simulation lambda sensor
Amplitude；
Second acquisition module, to obtain voltage signal caused by post oxygen sensor；
Second magnitude determinations module, shaken with calculating actual measurement post oxygen sensor according to the voltage signal of the post oxygen sensor
Width；
Diagnostic module, based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude, to diagnose the ternary
Whether catalyst breaks down.
According to some embodiments of the present invention, the simulation calculation module is configured as, by the triple mode catalytic converter
Predetermined cracking catalysis device is replaced with, calculates and passes through in the case of the control signal of the preceding lambda sensor and charge flow rate
Deserved voltage signal after the cracking catalysis device conversion, using the voltage signal as simulation oxygen sensor voltage signal.
According to some embodiments of the present invention, the diagnostic module includes：
Computing unit, the computing unit calculate the simulation lambda sensor amplitude in certain period of time and are averaged respectively
Value and the actual measurement catalyst monitoring sensor mean value of amplitude；With
Judging unit, the judging unit pass oxygen after the average value of the simulation lambda sensor amplitude and the actual measurement
Sensor mean value of amplitude is compared, and is shaken when the actual measurement post oxygen sensor mean value of amplitude is more than the simulation lambda sensor
During the average value of width, the triple mode catalytic converter failure is diagnosed as.
Further, the diagnostic module can also include：
Alarm unit, the alarm unit are configured as being diagnosed as the triple mode catalytic converter failure, then put brighten the hair
Motivation trouble light.
Further, the alarm unit can be configured for circulating diagnostic process, when the circulation of pre-determined number
In diagnostic process, the number for being diagnosed as the triple mode catalytic converter failure exceedes threshold value, then lights engine failure lamp.
According to the abovementioned embodiments of the present invention, by simulating the simulation lambda sensor amplitude under cracking catalysis device, with actual measurement
Post oxygen sensor amplitude is compared, if actual measurement post oxygen sensor amplitude exceedes the simulation lambda sensor under cracking catalysis device
Amplitude, then diagnose catalyst converter cracking, thereby, it is possible to using the signal being able to detect that in existing element, in real time, it is quick,
The fault diagnosis of triple mode catalytic converter is reliably carried out, it will not cause the increase of cost, and reliability is high.
Brief description of the drawings
Fig. 1 is the flow chart according to the method for diagnosing faults of the triple mode catalytic converter of the embodiment of the present invention；
Fig. 2 is that simulation is calculated to obtain in the method for diagnosing faults according to the triple mode catalytic converter of the embodiment of the present invention
Simulate the calculating process schematic diagram of oxygen sensor voltage signal；
Fig. 3 is the module map according to the trouble-shooter of the triple mode catalytic converter of the embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright part of the embodiment, rather than whole embodiments.Based on described embodiments of the invention, the common skill in this area
The every other embodiment that art personnel are obtained, belongs to the scope of protection of the invention.
Below, the method for diagnosing faults of triple mode catalytic converter according to embodiments of the present invention is carried out with reference to Fig. 1 first
Explanation.
As shown in figure 1, the method for diagnosing faults of triple mode catalytic converter according to embodiments of the present invention, including following step
Suddenly：
Control signal and charge flow rate caused by lambda sensor before step 1) obtains.
Wherein, control signal is for example including the correction factor fr_w of the closed loop fuel fed back according to preceding oxygen sensor voltage,
Correction factor fr_w is to carry out PI item regulations according to the dense dilute signal of lambda sensor, and the excursion that fr_w is adjusted according to PI items is big
It is generally 1+0.03.
Charge flow rate is air-mass flow ml, the exhaust stream being calculated according to charge flow rate ml_w combination air-fuel ratios
Measure msabg_w.
Step 2) is based on the control signal and charge flow rate, carries out simulation calculating, obtains simulation oxygen sensor voltage letter
Number.
For example, according to some examples of the present invention, the triple mode catalytic converter is replaced with to predetermined cracking catalysis
Device, in the case of the control signal of the preceding lambda sensor and charge flow rate, calculate and change it by the cracking catalysis device
Deserved voltage signal afterwards, using the voltage signal as simulation oxygen sensor voltage signal.
Fig. 2 is the calculating process schematic diagram that the simulation calculates.
Analog voltage signal, such as can be calculated by the following method：
1st, its amplitude is calculated according to correction factor fr_w；
2nd, after fr_w amplitude being multiplied by extraction flow msabg_w, a series of signal filter is carried out according to air-mass flow
Ripple processing simulates the simulation oxygen sensor voltage under the conditions of cracking catalysis device, and the mechanism of simulation is exactly the lambda sensor simulated
Voltage change and cracking catalysis device actual measurement oxygen sensor voltage change probably it is consistent.
Step 3) calculates according to the simulation oxygen sensor voltage signal and obtains simulation lambda sensor amplitude.
On calculating the method for obtaining simulation lambda sensor amplitude from voltage signal, such as can enter by the following method
OK：The average value N of a period of time above-mentioned voltage signal is calculated, calculates the deviation between current voltage signal and the average value, meter
The average value M of the absolute value of the deviation in a period of time is calculated, the average value M of the absolute value of above-mentioned deviation is multiplied by a COEFFICIENT K
(COEFFICIENT K is related to engine speed and load), the value of gained are to simulate lambda sensor amplitude.
Step 4) obtains voltage signal caused by post oxygen sensor.
Step 5) calculates actual measurement post oxygen sensor amplitude according to the voltage signal of the post oxygen sensor.
The computational methods may be referred to above-mentioned steps 3) in computational methods carry out, will not be repeated here.
Step 6) is based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude, diagnoses the three-element catalytic
Whether converter breaks down.
According to some embodiments of the present invention, step 6) can include following sub-step：
The average value of the simulation sample sensor amplitude and the actual measurement downstream oxygen in certain period of time 6-1) are calculated respectively
Sensor amplitude average value；
6-2) average value of the simulation lambda sensor amplitude and the actual measurement post oxygen sensor mean value of amplitude are carried out
Compare, when the actual measurement post oxygen sensor mean value of amplitude is more than the average value of the simulation lambda sensor amplitude, be diagnosed as
The triple mode catalytic converter failure.
Further, the step 6) can also include following sub-step：
6-3) when being diagnosed as the triple mode catalytic converter failure, then engine failure lamp is lighted.
In some examples of the present invention, in sub-step 6-3) in, carry out circulation diagnostic process (, when predetermined circulation diagnosis
In number of processes (such as taking 100 times), the number for being diagnosed as the triple mode catalytic converter failure exceedes threshold value and (such as takes 80
It is secondary), then light engine failure lamp.
Certainly, above-mentioned predetermined circular treatment diagnostic process number and threshold value can be according to use environment, used three
Concrete condition of first catalyst etc. is suitably changed.
Below, with reference to Fig. 2, the trouble-shooter of triple mode catalytic converter according to embodiments of the present invention is said
It is bright.
As shown in Fig. 2 the trouble-shooter 10 of triple mode catalytic converter according to embodiments of the present invention, including：First
Acquisition module 100, simulation calculation module 200, the first magnitude determinations module 300, the second acquisition module 400, the second magnitude determinations
Module 500 and diagnostic module 600.
Wherein, the first acquisition module 100, for control signal and charge flow rate caused by lambda sensor before obtaining.
Simulation calculation module 200, based on the control signal and charge flow rate, simulation calculating is carried out, obtain simulation oxygen and pass
Sensor voltage signal.
Specifically, simulation calculation module 200 can be configured as, and the triple mode catalytic converter be replaced with predetermined
Cracking catalysis device, calculated in the case of the control signal of the preceding lambda sensor and charge flow rate and pass through the cracking catalysis
Deserved voltage signal after device conversion, using the voltage signal as simulation oxygen sensor voltage signal.
First magnitude determinations module 300, according to the simulation oxygen sensor voltage signal, calculate and obtain simulation oxygen sensing
Device amplitude.
Second acquisition module 400, obtain voltage signal caused by post oxygen sensor.
Second magnitude determinations module 500, actual measurement post oxygen sensor is calculated according to the voltage signal of the post oxygen sensor and shaken
Width.
Diagnostic module 600, based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude, diagnosis described three
Whether first catalyst breaks down.
Specifically, diagnostic module 600 can include：Computing unit (not shown) and judging unit (not shown).
Wherein, the computing unit calculate respectively in certain period of time it is described simulation lambda sensor amplitude average value and
The actual measurement catalyst monitoring sensor mean value of amplitude.
The judging unit puts down the average value of the simulation lambda sensor amplitude and the actual measurement post oxygen sensor amplitude
Average is compared, when the actual measurement post oxygen sensor mean value of amplitude is more than the average value of the simulation lambda sensor amplitude
When, it is diagnosed as the triple mode catalytic converter failure.
Further, diagnostic module 600 can also include alarm unit (not shown).The alarm unit is configured as,
When being diagnosed as the triple mode catalytic converter failure, then engine failure lamp is lighted.Specifically, the alarm unit can be with
It is configured for circulating diagnostic process, is changed when in predetermined circular treatment diagnostic process number, being diagnosed as the three-element catalytic
The number of device failure exceedes threshold value, then lights engine failure lamp.
According to the abovementioned embodiments of the present invention, by simulating the simulation lambda sensor amplitude under cracking catalysis device, with actual measurement
Post oxygen sensor amplitude is compared, if actual measurement post oxygen sensor amplitude exceedes the simulation lambda sensor under cracking catalysis device
Amplitude, then diagnose catalyst converter cracking, thereby, it is possible to using the signal being able to detect that in existing element, in real time, it is quick,
The fault diagnosis of triple mode catalytic converter is reliably carried out, it will not cause the increase of cost, and reliability is high.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of method for diagnosing faults of triple mode catalytic converter, it is characterised in that comprise the following steps：
1) control signal and charge flow rate caused by lambda sensor before obtaining；
2) control signal and charge flow rate are based on, carries out simulation calculating, obtains simulation oxygen sensor voltage signal；
3) according to the simulation oxygen sensor voltage signal, calculate and obtain simulation lambda sensor amplitude；
4) voltage signal caused by post oxygen sensor is obtained；
5) actual measurement post oxygen sensor amplitude is calculated according to the voltage signal of the post oxygen sensor；
6) based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude, whether the triple mode catalytic converter is diagnosed
Break down.
2. method for diagnosing faults as claimed in claim 1, it is characterised in that the step 2) specifically includes：
The triple mode catalytic converter is replaced with to predetermined cracking catalysis device, the preceding lambda sensor control signal and enter
Deserved voltage signal after cracking catalysis device conversion is calculated in the case of throughput, using the voltage signal as simulation
Oxygen sensor voltage signal.
3. method for diagnosing faults as claimed in claim 1, it is characterised in that the step 6) includes following sub-step：
The average value of the simulation lambda sensor amplitude and the actual measurement downstream oxygen sensing in certain period of time 6-1) are calculated respectively
Device mean value of amplitude；
6-2) average value of the simulation lambda sensor amplitude and the actual measurement post oxygen sensor mean value of amplitude are compared,
When the actual measurement post oxygen sensor mean value of amplitude is more than the average value of the simulation lambda sensor amplitude, described three are diagnosed as
First catalyst failure.
4. method for diagnosing faults as claimed in claim 3, it is characterised in that the step 6) also includes following sub-step：
6-3) when being diagnosed as the triple mode catalytic converter failure, then engine failure lamp is lighted.
5. method for diagnosing faults as claimed in claim 4, it is characterised in that in sub-step 6-3) in, circulate at diagnosis
Reason, when the number in the circulation diagnostic process of pre-determined number, being diagnosed as the triple mode catalytic converter failure exceedes threshold value, then point
Brighten the hair motivation trouble light.
A kind of 6. trouble-shooter of triple mode catalytic converter, it is characterised in that including：
First acquisition module, with control signal and charge flow rate caused by lambda sensor before acquisition；
Simulation calculation module, based on the control signal and charge flow rate, to carry out simulation calculating, obtain simulation lambda sensor electricity
Press signal；
First magnitude determinations module, according to the simulation oxygen sensor voltage signal, to calculate and obtain simulation lambda sensor amplitude；
Second acquisition module, to obtain voltage signal caused by post oxygen sensor；
Second magnitude determinations module, to calculate actual measurement post oxygen sensor amplitude according to the voltage signal of the post oxygen sensor；
Diagnostic module, based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude, to diagnose the three-element catalytic
Whether converter breaks down.
7. trouble-shooter as claimed in claim 6, it is characterised in that the simulation calculation module is configured as, by institute
State triple mode catalytic converter and replace with predetermined cracking catalysis device, in the control signal and charge flow rate of the preceding lambda sensor
In the case of calculate the deserved voltage signal after cracking catalysis device conversion, using the voltage signal to simulate lambda sensor
Voltage signal.
8. trouble-shooter as claimed in claim 6, it is characterised in that the diagnostic module includes：
Computing unit, the computing unit calculate the average value of the simulation lambda sensor amplitude and institute in certain period of time respectively
State actual measurement catalyst monitoring sensor mean value of amplitude；With
Judging unit, the judging unit shake the average value of the simulation lambda sensor amplitude and the actual measurement post oxygen sensor
Width average value is compared, when the actual measurement post oxygen sensor mean value of amplitude is more than being averaged for the simulation lambda sensor amplitude
During value, the triple mode catalytic converter failure is diagnosed as.
9. trouble-shooter as claimed in claim 8, it is characterised in that the diagnostic module also includes：
Alarm unit, the alarm unit are configured as being diagnosed as the triple mode catalytic converter failure, then light engine
Trouble light.
10. trouble-shooter as claimed in claim 9, it is characterised in that the alarm unit is configured for circulating
Diagnostic process, when the number in the circulation diagnostic process of pre-determined number, being diagnosed as the triple mode catalytic converter failure exceedes threshold
Value, then light engine failure lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710847237.7A CN107676158B (en) | 2017-09-19 | 2017-09-19 | The method for diagnosing faults and device of triple mode catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710847237.7A CN107676158B (en) | 2017-09-19 | 2017-09-19 | The method for diagnosing faults and device of triple mode catalytic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107676158A true CN107676158A (en) | 2018-02-09 |
| CN107676158B CN107676158B (en) | 2019-11-05 |
Family
ID=61135924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710847237.7A Expired - Fee Related CN107676158B (en) | 2017-09-19 | 2017-09-19 | The method for diagnosing faults and device of triple mode catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107676158B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09256839A (en) * | 1996-03-22 | 1997-09-30 | Toyota Motor Corp | Catalyst deterioration discriminating device |
| US5848527A (en) * | 1996-04-11 | 1998-12-15 | Toyota Jidosha Kabushiki Kaisha | Apparatus for detecting deterioration of a three-way catalytic converter for an engine |
| CN1769856A (en) * | 2005-07-28 | 2006-05-10 | 西华大学 | Fault detection method and system for three-effect catalyzer |
| CN101832172A (en) * | 2010-04-23 | 2010-09-15 | 北京锐意泰克汽车电子有限公司 | Fault diagnosis method for three-way catalytic converter of automobile |
| CN102650229A (en) * | 2011-02-24 | 2012-08-29 | 上海通用汽车有限公司 | Method and device for detecting oxygen storage capacity of three-way catalyst |
| CN105443217A (en) * | 2015-12-17 | 2016-03-30 | 潍柴动力股份有限公司 | Method and device for detecting blocking of three-way catalyst |
-
2017
- 2017-09-19 CN CN201710847237.7A patent/CN107676158B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09256839A (en) * | 1996-03-22 | 1997-09-30 | Toyota Motor Corp | Catalyst deterioration discriminating device |
| US5848527A (en) * | 1996-04-11 | 1998-12-15 | Toyota Jidosha Kabushiki Kaisha | Apparatus for detecting deterioration of a three-way catalytic converter for an engine |
| CN1769856A (en) * | 2005-07-28 | 2006-05-10 | 西华大学 | Fault detection method and system for three-effect catalyzer |
| CN101832172A (en) * | 2010-04-23 | 2010-09-15 | 北京锐意泰克汽车电子有限公司 | Fault diagnosis method for three-way catalytic converter of automobile |
| CN102650229A (en) * | 2011-02-24 | 2012-08-29 | 上海通用汽车有限公司 | Method and device for detecting oxygen storage capacity of three-way catalyst |
| CN105443217A (en) * | 2015-12-17 | 2016-03-30 | 潍柴动力股份有限公司 | Method and device for detecting blocking of three-way catalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107676158B (en) | 2019-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20120023911A1 (en) | Detection of exhaust particulate filter substrate failure | |
| CN105370355B (en) | The desulphurization control mode of SCR system | |
| EP3255257B1 (en) | Internal combustion engine and exhaust-gas-component estimating method | |
| US9038369B2 (en) | Systems and methods for aftertreatment system diagnostics | |
| US9581099B1 (en) | Method for diagnosing SCR catalyst and feed gas quality in a diesel after-treatment system | |
| US8629781B2 (en) | Efficiency determination for a selective-catalytic-reduction catalyst | |
| US9416715B2 (en) | Method for monitoring an exhaust system of an internal combustion engine | |
| US5228335A (en) | Method and apparatus for detection of catalyst failure on-board a motor vehicle using a dual oxygen sensor and an algorithm | |
| CN105649736B (en) | Lambda sensor fault detection method and device | |
| CN113187638B (en) | Method for diagnosing high sulfur content in fuel oil | |
| CN113446098B (en) | Anti-cheating diagnosis method and device for three-way catalyst of engine | |
| CN113586214B (en) | Three-way catalyst monitoring method, vehicle exhaust system and vehicle | |
| CN108035789A (en) | Gasoline car multistage ternary catalyzing unit performance on-line monitoring system and method | |
| CN108825344B (en) | NO (nitric oxide)xMethod and device for judging reasonability of sensor measurement value | |
| KR20180066487A (en) | Leak detection method of dpf by using a nitrogen oxide sensor | |
| Clemmens et al. | Detection of catalyst performance loss using on-board diagnostics | |
| CN112664302B (en) | Method for monitoring catalyst poisoning of diesel engine aftertreatment system | |
| CN111335993B (en) | Automobile and error reporting method and system for simulating low efficiency of SCR system thereof | |
| CN111120055B (en) | Method and device for detecting concentration change of urea in engine and storage medium | |
| CN107676158A (en) | The method for diagnosing faults and device of triple mode catalytic converter | |
| CN111219235A (en) | Vehicle exhaust gas treatment method, device, storage medium and vehicle | |
| CN108368791B (en) | Method for testing a humidity sensor of a diesel engine | |
| CN109057929A (en) | A kind of method and device of detection ternary catalyzing unit blocking | |
| US20200363294A1 (en) | Method of determining the evaluation time for a diagnosis | |
| CN108119214B (en) | Three-way catalyst fault detection method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200423 Address after: 100130 Zhaofeng Town, Shunyi District, Beijing Zhaofeng industrial base Tongxin Road No. 1 Patentee after: BAIC GROUP ORV Co.,Ltd. Address before: 101300, 99, Shuanghe Avenue, Renhe Town, Beijing, Shunyi District Patentee before: BEIJING AUTOMOBILE RESEARCH GENERAL INSTITUTE Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191105 |