CN107676158B - 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
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- CN107676158B CN107676158B CN201710847237.7A CN201710847237A CN107676158B CN 107676158 B CN107676158 B CN 107676158B CN 201710847237 A CN201710847237 A CN 201710847237A CN 107676158 B CN107676158 B CN 107676158B
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- oxygen sensor
- amplitude
- catalytic converter
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- 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
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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)
- Measuring Oxygen Concentration In Cells (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention provides the method for diagnosing faults and device of a kind of triple mode catalytic converter, wherein method for diagnosing faults includes the following steps: the control signal and charge flow rate that lambda sensor generates before 1) obtaining；2) it is based on the control signal and charge flow rate, carries out simulation calculating, obtains simulation oxygen sensor voltage signal；3) it according to the simulation oxygen sensor voltage signal, calculates and obtains simulation lambda sensor amplitude；4) voltage signal that the post oxygen sensor of triple mode catalytic converter to be diagnosed generates 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, particularly, are related to a kind of fault diagnosis side of triple mode catalytic converter
Method and device.
Background technique
Ternary catalyzing unit is mounted in most important outer purifier in automobile exhaust system, it can arrange vehicle exhaust
The pernicious gases such as CO (carbon monoxide), HC (hydrocarbon) and NOx (nitrogen oxides) out are turned by oxidation and reduction
Become harmless carbon dioxide, water and nitrogen, to achieve the purpose that cleaning of off-gas, reduce pollution.
The ternary catalyzing unit of vehicle in normal use process can gradually cracking, not can be carried out finally three-element catalytic conversion,
So that it cannot meet the requirement of national emission regulation.In addition, vehicle is since improper use will also result in catalyst converter premature failure,
To cause tail gas exceeded.Therefore, control unit of engine is needed with three-element catalytic transition zone monitoring function, to find in time
The failure of triple mode catalytic converter, to guarantee triple mode catalytic converter purification efficiency with higher always.
There are many ways to detecting to the catalyzed conversion ability of ternary catalyzing unit can directly carry out HC emission
Monitoring, this method are needed using the sensor that can directly monitor HC emissions content, but due to high costs, reliable
Property it is not high enough the problems such as, it is currently used few.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of events of at low cost, high reliablity triple mode catalytic converter
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 an embodiment of the present invention, includes the following steps:
1) the control signal and charge flow rate that lambda sensor generates before obtaining；
2) it is based on the control signal and charge flow rate, carries out simulation calculating, obtains simulation oxygen sensor voltage signal；
3) it according to the simulation oxygen sensor voltage signal, calculates and obtains simulation lambda sensor amplitude；
4) voltage signal that the post oxygen sensor of triple mode catalytic converter to be diagnosed generates 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 triple mode catalytic converter is diagnosed
Whether break down.
According to some embodiments of the present invention, the step 2) can be with are as follows: replaces with the triple mode catalytic converter pre-
Fixed cracking catalysis device is calculated in the case where the control signal of the preceding lambda sensor and charge flow rate and is urged by the cracking
Change voltage signal deserved after device is converted, is simulation oxygen sensor voltage signal with the voltage signal.
According to some embodiments of the present invention, the step 6) includes following sub-step:
6-1) calculate separately the average value and actual measurement post oxygen sensor of the simulation sample sensor amplitude in certain period of time
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 carried out
Compare, when the actual measurement post oxygen sensor mean value of amplitude is greater than the average value of the simulation lambda sensor amplitude, is diagnosed as
The triple mode catalytic converter failure.
According to some embodiments of the present invention, the step 6) further 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), 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 is more than 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 an embodiment of the present invention, comprising:
First obtains module, to obtain the control signal and charge flow rate that preceding lambda sensor generates；
Simulation calculation module carries out simulation calculating to be based on the control signal and charge flow rate, obtains simulation oxygen sensing
Device voltage signal；
First magnitude determinations module, to calculate and obtain simulation lambda sensor according to the simulation oxygen sensor voltage signal
Amplitude；
Second obtains module, to obtain the voltage signal that the post oxygen sensor of triple mode catalytic converter to be diagnosed generates；
Second magnitude determinations module, to calculate actual measurement post oxygen sensor vibration according to the voltage signal of the post oxygen sensor
Width；
Diagnostic module, to diagnose the ternary based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude
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
Scheduled cracking catalysis device is replaced with, is calculated in the case where the control signal of the preceding lambda sensor and charge flow rate and passes through institute
Voltage signal deserved after cracking catalysis device is converted is stated, is simulation oxygen sensor voltage signal with the voltage signal.
According to some embodiments of the present invention, the diagnostic module includes:
Computing unit, the computing unit calculate separately the average value of the simulation lambda sensor amplitude in certain period of time
With actual measurement post oxygen sensor mean value of amplitude；With
Judging unit, the judging unit sense oxygen after the average value of the simulation lambda sensor amplitude and the actual measurement
Device mean value of amplitude is compared, when the actual measurement post oxygen sensor mean value of amplitude is greater than the simulation lambda sensor amplitude
When average value, it is diagnosed as the triple mode catalytic converter failure.
Further, the diagnostic module can also include:
Alarm unit, the alarm unit are configured as then putting brighten the hair when being diagnosed as the triple mode catalytic converter failure
Motivation trouble light.
Further, the alarm unit, which can be configured as, carries out circulation diagnostic process, when the circulation of pre-determined number
In diagnostic process, the number for being diagnosed as the triple mode catalytic converter failure is more than threshold value, then lights engine failure lamp.
According to the abovementioned embodiments of the present invention, by the simulation lambda sensor amplitude under simulation cracking catalysis device, with actual measurement
Post oxygen sensor amplitude is compared, if actual measurement post oxygen sensor amplitude is more than the simulation lambda sensor vibration under cracking catalysis device
Width then diagnoses 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, can
The fault diagnosis that triple mode catalytic converter is carried out by ground, not will lead to the increase of cost, and high reliablity.
Detailed description of the invention
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 to be calculated according to simulation in the method for diagnosing faults of the triple mode catalytic converter of the embodiment of the present invention to obtain mould
The calculating process schematic diagram of quasi- 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.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, ordinary skill
Personnel's every other embodiment obtained, shall fall within the protection scope of the present invention.
In the following, Fig. 1 is combined to carry out the method for diagnosing faults of triple mode catalytic converter according to an embodiment of the present invention first
Explanation.
As shown in Figure 1, the method for diagnosing faults of triple mode catalytic converter according to an embodiment of the present invention, including walk as follows
It is rapid:
The control signal and charge flow rate that lambda sensor generates before step 1) obtains.
Wherein, correction factor fr_w of the signal for example including the closed loop fuel fed back according to preceding oxygen sensor voltage is controlled,
Correction factor fr_w is to carry out PI adjustings according to the dense dilute signal of lambda sensor, and the variation range that fr_w is adjusted according to PI is general
It is 1+0.03.
Charge flow rate is air-mass flow ml, the extraction flow being calculated according to charge flow rate ml_w combination air-fuel ratio
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, some examples according to the present invention, replace with scheduled cracking catalysis device for the triple mode catalytic converter,
In the case where the control signal of the preceding lambda sensor and charge flow rate, calculates and answered after cracking catalysis device conversion
The voltage signal obtained is simulation oxygen sensor voltage signal with the 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:
1, its amplitude is calculated according to correction factor fr_w；
2, after the amplitude of fr_w multiplied by extraction flow msabg_w, a series of signal filter is carried out according to air-mass flow
Wave 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 is probably consistent with the actual measurement oxygen sensor voltage variation of cracking catalysis device.
Step 3) calculates according to the simulation oxygen sensor voltage signal and obtains simulation lambda sensor amplitude.
About from voltage signal calculate obtain simulation lambda sensor amplitude method, such as can by the following method into
Row: calculating the average value N of a period of time above-mentioned voltage signal, calculates the deviation between current voltage signal and the average value, meter
The average value M for calculating the inclined absolute value of the difference in a period of time, by the average value M of above-mentioned inclined absolute value of the difference multiplied by a COEFFICIENT K
(COEFFICIENT K is related to engine speed and load), resulting value are simulation lambda sensor amplitude.
Step 4) obtains the voltage signal that the post oxygen sensor of triple mode catalytic converter to be diagnosed generates.
Step 5) calculates actual measurement post oxygen sensor amplitude according to the voltage signal of the post oxygen sensor.
The calculation method can refer to above-mentioned steps 3) in calculation method carry out, details are not described herein.
Step 6) is based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude, diagnoses the three-element catalytic and turns
Whether parallel operation breaks down.
According to some embodiments of the present invention, step 6) may include following sub-step:
6-1) calculate separately the average value and actual measurement post oxygen sensor of the simulation sample sensor amplitude in certain period of time
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 carried out
Compare, when the actual measurement post oxygen sensor mean value of amplitude is greater than the average value of the simulation lambda sensor amplitude, is 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 invention, in sub-step 6-3), circulation diagnostic process is carried out, at predetermined circulation diagnosis
It manages in number (such as taking 100 times), the number for being diagnosed as the triple mode catalytic converter failure is more than threshold value (such as taking 80 times),
Then light engine failure lamp.
Certainly, above-mentioned predetermined circulation diagnostic process number and threshold value can be urged according to use environment, used ternary
The concrete condition etc. for changing converter is suitably changed.
In the following, being said in conjunction with Fig. 2 to the trouble-shooter of triple mode catalytic converter according to an embodiment of the present invention
It is bright.
As shown in Fig. 2, the trouble-shooter 10 of triple mode catalytic converter according to an embodiment of the present invention, comprising: first
It obtains module 100, simulation calculation module 200, the first magnitude determinations module 300, second and obtains module 400, the second magnitude determinations
Module 500 and diagnostic module 600.
Wherein, first module 100 is obtained, the control signal and charge flow rate generated for lambda sensor before obtaining.
Simulation calculation module 200 is based on the control signal and charge flow rate, carries out simulation calculating, obtains simulation oxygen and passes
Sensor voltage signal.
Specifically, simulation calculation module 200 can be configured as, and the triple mode catalytic converter is replaced with scheduled split
Change catalyst converter, calculates in the case where the control signal of the preceding lambda sensor and charge flow rate and turn by the cracking catalysis device
Deserved voltage signal after alternatively is simulation oxygen sensor voltage signal with the voltage signal.
First magnitude determinations module 300 calculates according to the simulation oxygen sensor voltage signal and obtains simulation lambda sensor
Amplitude.
Second obtains module 400, obtains the voltage signal that the post oxygen sensor of triple mode catalytic converter to be diagnosed generates.
Second magnitude determinations module 500 calculates actual measurement post oxygen sensor vibration according to the voltage signal of the post oxygen sensor
Width.
Diagnostic module 600 diagnoses the ternary based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude
Whether catalyst breaks down.
Specifically, diagnostic module 600 may include: computing unit (not shown) and judging unit (not shown).
Wherein, the computing unit calculates separately the average value and reality of the simulation lambda sensor amplitude in certain period of time
Survey post oxygen 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
Mean value is compared, when the actual measurement post oxygen sensor mean value of amplitude is greater 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 also quilt
It is configured to carry out circulation diagnostic process, in predetermined circulation diagnostic process number, is diagnosed as the triple mode catalytic converter failure
Number be more than threshold value, then light engine failure lamp.
According to the abovementioned embodiments of the present invention, by the simulation lambda sensor amplitude under simulation cracking catalysis device, with actual measurement
Post oxygen sensor amplitude is compared, if actual measurement post oxygen sensor amplitude is more than the simulation lambda sensor vibration under cracking catalysis device
Width then diagnoses 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, can
The fault diagnosis that triple mode catalytic converter is carried out by ground, not will lead to the increase of cost, and high reliablity.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of method for diagnosing faults of triple mode catalytic converter, which comprises the steps of:
1) the control signal and charge flow rate that lambda sensor generates before obtaining；
2) it is based on the control signal and charge flow rate, carries out simulation calculating, obtains simulation oxygen sensor voltage signal；
3) it according to the simulation oxygen sensor voltage signal, calculates and obtains simulation lambda sensor amplitude；
4) voltage signal that the post oxygen sensor of triple mode catalytic converter to be diagnosed generates 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
It breaks down；
The step 2) specifically includes:
The triple mode catalytic converter is replaced with into scheduled cracking catalysis device, the preceding lambda sensor control signal and into
Deserved voltage signal after cracking catalysis device conversion is calculated in the case where throughput, is simulation with the voltage signal
Oxygen sensor voltage signal.
2. method for diagnosing faults as described in claim 1, which is characterized in that the step 6) includes following sub-step:
6-1) calculate separately the average value and actual measurement post oxygen sensor amplitude of the simulation lambda sensor amplitude in certain period of time
Average value；
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 greater than the average value of the simulation lambda sensor amplitude, it is diagnosed as described three
First catalyst failure.
3. method for diagnosing faults as claimed in claim 2, which is characterized in that the step 6) further includes following sub-step:
6-3) when being diagnosed as the triple mode catalytic converter failure, then engine failure lamp is lighted.
4. method for diagnosing faults as claimed in claim 3, which is characterized in that in sub-step 6-3), carry out at circulation diagnosis
Reason, in the circulation diagnostic process of pre-determined number, the number for being diagnosed as the triple mode catalytic converter failure is more than threshold value, then point
Brighten the hair motivation trouble light.
5. a kind of trouble-shooter of triple mode catalytic converter characterized by comprising
First obtains module, to obtain the control signal and charge flow rate that preceding lambda sensor generates；
Simulation calculation module carries out simulation calculating to be based on the control signal and charge flow rate, obtains simulation lambda sensor electricity
Press signal；
First magnitude determinations module, to calculate and obtain simulation lambda sensor amplitude according to the simulation oxygen sensor voltage signal；
Second obtains module, to obtain the voltage signal that the post oxygen sensor of triple mode catalytic converter to be diagnosed generates；
Second magnitude determinations module, to calculate actual measurement post oxygen sensor amplitude according to the voltage signal of the post oxygen sensor；
Diagnostic module, to diagnose the three-element catalytic based on the simulation lambda sensor amplitude and actual measurement post oxygen sensor amplitude
Whether converter breaks down；
The simulation calculation module is configured as, and the triple mode catalytic converter is replaced with scheduled cracking catalysis device, in institute
It is calculated in the case where the control signal and charge flow rate of lambda sensor before stating deserved after cracking catalysis device conversion
Voltage signal is simulation oxygen sensor voltage signal with the voltage signal.
6. trouble-shooter as claimed in claim 5, which is characterized in that the diagnostic module includes:
Computing unit, the computing unit calculate separately the average value and reality of the simulation lambda sensor amplitude in certain period of time
Survey post oxygen 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 greater than being averaged for the simulation lambda sensor amplitude
When value, it is diagnosed as the triple mode catalytic converter failure.
7. trouble-shooter as claimed in claim 6, which is characterized in that the diagnostic module further include:
Alarm unit, the alarm unit are configured as then lighting engine when being diagnosed as the triple mode catalytic converter failure
Trouble light.
8. trouble-shooter as claimed in claim 7, which is characterized in that the alarm unit is configured for circulation and examines
Disconnected processing, in the circulation diagnostic process of pre-determined number, the number for being diagnosed as the triple mode catalytic converter failure is more than threshold value,
Then light engine failure lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710847237.7A CN107676158B (en) | 2017-09-19 | 2017-09-19 | The method for diagnosing faults and device of triple mode catalytic converter |
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| 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 |
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| Publication Number | Publication Date |
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| CN107676158A CN107676158A (en) | 2018-02-09 |
| CN107676158B true CN107676158B (en) | 2019-11-05 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09256839A (en) * | 1996-03-22 | 1997-09-30 | Toyota Motor Corp | Catalyst deterioration discriminating device |
| JP3336854B2 (en) * | 1996-04-11 | 2002-10-21 | トヨタ自動車株式会社 | Catalyst deterioration determination device for internal combustion engine |
| CN1769856A (en) * | 2005-07-28 | 2006-05-10 | 西华大学 | Fault detection method and system for three-effect catalyzer |
| CN101832172B (en) * | 2010-04-23 | 2012-01-04 | 北京锐意泰克汽车电子有限公司 | Fault diagnosis method for three-way catalytic converter of automobile |
| CN102650229B (en) * | 2011-02-24 | 2013-10-30 | 上海通用汽车有限公司 | Method and device for detecting oxygen storage capacity of three-way catalyst |
| CN105443217B (en) * | 2015-12-17 | 2018-04-03 | 潍柴动力股份有限公司 | A kind of method and device for detecting ternary catalyzing unit and blocking |
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2017
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