CN102650229A - Method and device for detecting oxygen storage capacity of three-way catalyst - Google Patents
Method and device for detecting oxygen storage capacity of three-way catalyst Download PDFInfo
- Publication number
- CN102650229A CN102650229A CN2011100503238A CN201110050323A CN102650229A CN 102650229 A CN102650229 A CN 102650229A CN 2011100503238 A CN2011100503238 A CN 2011100503238A CN 201110050323 A CN201110050323 A CN 201110050323A CN 102650229 A CN102650229 A CN 102650229A
- Authority
- CN
- China
- Prior art keywords
- oxygen
- moment
- storage capacity
- constantly
- predetermined value
- 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
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention discloses a method for detecting oxygen storage capacity. The method comprises the following steps of: absorbing oxygen in a saturation way by a catalyst when a vehicle runs; after the catalyst absorbs oxygen in a saturation way, obtaining an engine intake flow of a special moment based on a preset sampling period starting from the front oxygen reaction moment; utilizing the obtained engine intake flow to calculate the oxygen storage quantity of the catalyst at each sampling moment; accumulating the oxygen storage capacities starting from the front oxygen reaction moment to the ending of the rear oxygen reaction moment, wherein the front oxygen reaction moment is the moment that the voltage of a front oxygen sensor signal rises up to pass through the first preset value, and the rear oxygen reaction moment is the moment that the voltage of a rear oxygen sensor signal rises up to pass through the second preset value. The device for detecting oxygen storage capacity of the three-way catalyst comprises an intake flow sampling unit, a multiplier and an accumulator. With the adoption of the method and a device provided by the invention, the successful rate of detection is improved, and the measuring accuracy of the oxygen storage capacity of the catalyst is improved, thus, better reliability of the detection result of the catalyst can be ensured.
Description
Technical field
The present invention relates to a kind of oxygen storage capacity detecting method and detection device of ternary catalyzing unit.
Background technique
Along with to the improving constantly of environmental protection requirement, the discharge capacity of motor reduces day by day, efficient increases gradually, simultaneously, for any inefficacy that possibly cause the component that vehicle emission exceeds standard on the vehicle, all requires onboard system (OBD) to Report a Problem effectively.Particularly when as the ternary catalyzing unit inefficiency of vehicle emission catalyticing conversioning equipment, the vehicle mounted failure detection system must be reported fault.
At present, vehicle-mounted detection system comprises the detecting method of ternary catalyzing unit: under idling operation, motor is carried out the rare partially/dense partially control of fuel oil; Before and after measuring the reaction time of lambda sensor poor, the efficient of ternary catalyzing unit is judged the concrete grammar following steps according to this time difference:
(1) the saturated oxygen uptake of catalyst converter.In this stage, engine air-fuel ratio is rare partially, and oxygen is superfluous in the discharging tail gas, and polynary oxygen is made catalyst converter fully absorb oxygen in this stage by catalyst adsorbs, is in the state that can know.
(2) oxygen storage capacity is measured.In this stage, engine air-fuel ratio is dense partially, and oxygen is not enough in the discharging tail gas, and unnecessary burn incompletely thing will consume the oxygen that catalyst converter stores, and calculates the oxygen storage capacity of catalyst converter from ruing out of the required unnecessary fuel oil of oxygen that stores in the catalyst converter.
Said method is based on following principle:
OSC(gramsO
2)T＝MAF(t)×ABS(FR-1)×(MO
2/Mair)×t_OSC0 (1)
Wherein:
OSC (grams O
2) T is the oxygen storage capacity of catalyst converter
MAF (t) is the charge flow rate of motor, this value stabilization under the idling operation;
FR is the true equivalent air fuel ratio (equivalent air fuel ratio=air fuel ratio/14.7) when measuring operating mode, is constant;
MO
2/ Mair is the shared percentage of oxygen in the air, is constant;
T_OSC0 is that the reaction time of front and back oxygen in the measuring phase is poor;
MAF (t) * ABS (FR-1) * (MO
2/ Mair) be the amount of oxygen in the catalyst converter that consumes in the measuring phase.Wherein, ABS () is the function that carries out absolute calculation.
Because the oxygen proportion all is a constant in air inflow, air fuel ratio, the air, so the oxygen storage capacity of catalyst converter just is directly proportional with the reaction time difference t_OSC0 of front and back lambda sensor.
For the fuel economy of pursuing, in the process of float amount development, the air inflow MAF under the engine idling condition (t) is more and more littler at motor.Under this operating mode, because air input of engine by air is little, utilize said method that the efficient of ternary catalyzing unit is detected, can produce following negative consequence:
One,,,, under the constant situation of the equivalent air fuel ratio in measuring phase, can cause detection time t_OSC0 elongated, thereby influence detection speed because oxygen storage capacity OSC (grams O2) T is the same for same catalyst converter because air inflow MAF (t) is little.
Two, because air inflow MAF (t) is little, and the measuring accuracy of air inflow is poor, and the air inflow measurement error can reach 10% under the little air inflow situation, cause measurement result OSC (grams O2) T scattered error to become big, make the measurement result deterioration in accuracy.
Three, under little air inflow condition, carry out the rare partially/dense partially control of air fuel ratio, make engine cylinder internal combustion variation, cause the engine stabilization variation, the fluctuation of speed is excessive, makes motor that flame-out risk arranged.
Therefore be necessary to design a kind of novel detection method, to overcome prior art problems.
Summary of the invention
To the defective of existing technology, the purpose of this invention is to provide the detecting method that a kind of detection speed is faster, measuring accuracy is higher.
Oxygen storage capacity detecting method of the present invention comprises: a. makes the saturated oxygen uptake of catalyst converter when vehicle operating; B. after the saturated oxygen uptake of catalyst converter, the oxygen reaction begins constantly in the past, obtains the engine intake airflow of particular moment to be scheduled to the sampling period; C. utilize the engine intake airflow that is obtained,, calculate the catalyst converter oxygen storage capacity of each sampling instant according to following formula:
MAF (t) is an engine intake airflow, and this variable changes in time; FR is the equivalent air fuel ratio, and this value is constant; MO2/Mair is the shared percentage of oxygen in the air, is constant;
is the sampling period; Tx is sampling instant, and ABS is the function that carries out signed magnitude arithmetic(al);
D. to according to calculating among the step c, the catalyst converter oxygen storage capacity that the oxygen reaction begins constantly in the past, the oxygen reaction finishes constantly to the back adds up, and wherein, the voltage that preceding oxygen reaction constantly is preceding oxygen sensor signal rises and passes through the moment of first predetermined value; Back oxygen reaction constantly is the moment that second predetermined value is passed through in the rising of post oxygen sensor voltage of signals.
Preferably, said equivalent air fuel ratio is 14.7.
Preferably, said first predetermined value is 450 millivolts.
Preferably, said second predetermined value is 450 millivolts.
Oxygen storage capacity detection device provided by the invention comprises: air inflow sampling unit, multiplier, accumulator, and wherein, said air inflow sampling unit is used to obtain the charge flow rate at the predetermined instant motor; Said multiplier is used for following physical quantity is multiplied each other: MAF (t
x), ABS (FR-1), MO2/Mair,
Wherein, MAF (t) is an engine intake airflow, and this variable changes in time; FR is the equivalent air fuel ratio, and this value is constant; MO2/Mair is the shared percentage of oxygen in the air, is constant;
Be the sampling period, t
xBe sampling instant, ABS is the function that carries out signed magnitude arithmetic(al).Said accumulator is used for multiplier is calculated, and the catalyst converter oxygen storage capacity that the oxygen reaction begins constantly in the past, the oxygen reaction finishes constantly to the back adds up, and wherein, the voltage that preceding oxygen reaction constantly is preceding oxygen sensor signal rises and passes through the moment of first predetermined value; Back oxygen reaction constantly is the moment that second predetermined value is passed through in the rising of post oxygen sensor voltage of signals.
Preferably, said equivalent air fuel ratio is 14.7.
Preferably, said first predetermined value is 450 millivolts.
Preferably, said second predetermined value is 450 millivolts.
Technological scheme of the present invention has changed the operating conditions when detecting test, and of the prior art changing in the vehicle driving way in the detection under the idling condition detected.In addition, technological scheme of the present invention has changed the object that detects measurement, and detected object becomes concrete catalyst converter oxygen storage capacity from the time, and feasible measurement is more accurate.
With respect to existing technology; The present invention is when detecting motor; Can avoid under the little air inflow condition of idling, carrying out the biasing control test of air fuel ratio, and avoid motor operation control stability is disturbed, eliminate engine speed fluctuation risk.
In running, air input of engine by air MAF (tx) is bigger, under the constant condition of catalyst converter oxygen storage capacity OSC (grams O2) T; Shorten detection time; Improve the success rate that detects, catalyst converter has been detected more easily accomplish, guaranteed test conditions and number of times that catalyst converter detects.
Because air inflow MAF (tx) is big; The measurement error of MAF (tx) diminishes, so actual mixing ratio control is more stable, has reduced to measure the fluctuating error scope of calculating; Improve the measuring accuracy of catalyst converter oxygen storage volume, can guarantee the reliability of catalyst converter testing result better.
Description of drawings
Fig. 1 is the flow chart of the oxygen storage capacity detecting method of the ternary catalyzing unit in one embodiment of the present invention;
Fig. 2 is the structural representation of the oxygen storage capacity detection device of the ternary catalyzing unit in one embodiment of the present invention.
Embodiment
The oxygen storage capacity detecting method that is used for ternary catalyzing unit in a kind of embodiment of the present invention may further comprise the steps:
In step 201, when vehicle operating, make the saturated oxygen uptake of catalyst converter.Catalyst converter fully absorbs oxygen in this stage, is in the state that can know.In the vehicle operating process, air input of engine by air MAF (tx) is big, so the measurement of air inflow is more accurate, makes that the measurement of final oxygen storage capacity is also more accurate, and according to the test in this mode of execution, the measurement error of oxygen storage capacity is less than 5%.
Oxygen storage capacity detecting method of the present invention is based on following principle realization:
Wherein, OSC (grams O2) T is the oxygen storage capacity of catalyst converter; MAF (t) is the charge flow rate of motor, and this amount changes during vehicle driving, is variable; FR is the equivalent air fuel ratio, is constant; MO2/Mair is the shared percentage of oxygen in the air, is constant; T0 is the preceding oxygen reaction moment, that is: preceding oxygen sensor signal rises to HV from low voltage, passes through 450 millivolts the moment; T1 is the back oxygen reaction moment, that is: the post oxygen sensor signal rises to HV from low voltage, passes through 450 millivolts the moment;
The physical meaning of
is the amount of oxygen in the catalyst converter that consumes in the measuring phase; Integration oxygen reaction moment t0 in the past begins, the oxygen reaction t1 end constantly to the back.
Therefore, in step 202, after the saturated oxygen uptake of catalyst converter, the oxygen reaction begins constantly in the past, obtains the engine intake airflow of particular moment to be scheduled to the sampling period.Through computer technology, guarantee quick sampling, thereby realize said integral and calculating air inflow.In one embodiment of the invention, the sampling period is 10ms, and promptly every 10ms sampling once.
In step 203, utilize the engine intake airflow that is obtained, according to following formula, calculate the catalyst converter oxygen storage capacity of each sampling instant:
Wherein: MAF (t) is an engine intake airflow, and tx is sampling instant, and this variable changes in time; FR is the equivalent air fuel ratio, and this value is constant; MO2/Mair is the shared percentage of oxygen in the air, is constant;
is the sampling period, and ABS () is the function that carries out signed magnitude arithmetic(al).
In step 203, the past oxygen reaction t0 constantly begins, and every 10ms carries out the computing of above-mentioned formula (a) then to engine intake airflow MAF (tx) once sampling.When the sampling time surpassed back oxygen reaction moment t1, sampling and calculating stopped.
In step 204, the catalyst converter oxygen storage capacity that the past oxygen reaction begins constantly, the oxygen reaction finishes constantly to the back that calculates according to formula in the step 203 is added up.All
during reacting constantly to back oxygen preceding oxygen reaction constantly add up
Because 10 milliseconds of samplings are once, so (t1-t0) in second 100 * (t1-t0) individual sampled points are arranged, therefore, accumulation result is:
That is:
The result who adds up be exactly before the oxygen reaction time be carved into the catalyst converter oxygen memory space between the oxygen reaction constantly of back.
Wherein, the reaction of preceding oxygen constantly is that the voltage of preceding oxygen sensor signal rises and passes through the moment of first predetermined value; Back oxygen reaction constantly is the moment that second predetermined value is passed through in the rising of post oxygen sensor voltage of signals.
The present invention has done improvement to detecting operating mode and measurement contents, and each element of binding engine electronic controller ECU, front and back lambda sensor and electric injection system through the software design, has been realized a kind of new catalyst converter oxygen storage capacity detecting method.
The present invention carries out rare partially/dense partially active to the vehicle motor air fuel ratio and inserts control, change the measurement operating mode that detects test in the vehicle driving process.Equally, owing to be to insert test in the process of moving, the air inflow of motor is no longer stable, and at this moment, the reaction time difference that can not simply measure front and back lambda sensor when detecting test is judged the efficient of catalyst converter.But adopted measurement to the true oxygen storage capacity of catalyst converter as measuring object, detect.
Correspondingly; The present invention also provides a kind of oxygen storage capacity detection device 300 that is used for ternary catalyzing unit; As shown in Figure 2, in one embodiment, said oxygen storage capacity detection device 300 comprises: air inflow sampling unit 301, multiplier 302, accumulator 303.
Said air inflow sampling unit 301 is used to obtain the charge flow rate at the predetermined instant motor.Air inflow sampling unit 301 can be by flow transducer and correspondent computer software module and hardware control unit realization.
Said multiplier 302 is used to carry out multiplying; In the present invention, be used for MAF (tx), ABS (FR-1), MO2/Mair,
are multiplied each other.Wherein, MAF (t) is an engine intake airflow, and this variable changes in time; FR is the equivalent air fuel ratio, and this value is constant; MO2/Mair is the shared percentage of oxygen in the air, is constant;
is the sampling period; Tx is sampling instant, and ABS is the function that carries out signed magnitude arithmetic(al).
Said accumulator 303 is used for multiplier is calculated; The catalyst converter oxygen storage capacity that the oxygen reaction begins constantly in the past, the oxygen reaction finishes constantly to the back adds up; Wherein, the reaction of preceding oxygen constantly is that the voltage of preceding oxygen sensor signal rises and passes through the moment of first predetermined value; Back oxygen reaction constantly is the moment that second predetermined value is passed through in the rising of post oxygen sensor voltage of signals.Preferably, said equivalent air fuel ratio is 14.7; Said first predetermined value is 450 millivolts; Said second predetermined value is 450 millivolts.
It will be understood by those skilled in the art that said multiplier 302, accumulator 303 all can be realized by software module or electronic circuit.
Though the invention discloses the foregoing description; But specific embodiment be not be used for limiting of the present invention; Any those skilled in the art; Do not breaking away from the spirit and scope of the present invention, can make some modifications and retouching, so protection scope of the present invention should be as the criterion with the scope that appending claims defines.
Claims (8)
1. the oxygen storage capacity detecting method of a ternary catalyzing unit is characterized in that, said method comprising the steps of:
A. when vehicle operating, make the saturated oxygen uptake of catalyst converter;
B. after the saturated oxygen uptake of catalyst converter, the oxygen reaction begins constantly in the past, obtains the engine intake airflow of particular moment to be scheduled to the sampling period;
C. utilize the engine intake airflow that is obtained,, calculate the catalyst converter oxygen storage capacity of each sampling instant according to following formula:
MAF (t) is an engine intake airflow, and this variable changes in time; FR is the equivalent air fuel ratio, and this value is constant; MO2/Mair is the shared percentage of oxygen in the air, is constant;
Be the sampling period, t
xBe sampling instant, ABS is the function that carries out signed magnitude arithmetic(al);
D. to according to calculating among the step c, the catalyst converter oxygen storage capacity that the oxygen reaction begins constantly in the past, the oxygen reaction finishes constantly to the back adds up, and wherein, the voltage that preceding oxygen reaction constantly is preceding oxygen sensor signal rises and passes through the moment of first predetermined value; Back oxygen reaction constantly is the moment that second predetermined value is passed through in the rising of post oxygen sensor voltage of signals.
2. method according to claim 1 is characterized in that, said equivalent air fuel ratio is 14.7.
3. method according to claim 1 is characterized in that, said first predetermined value is 450 millivolts.
4. method according to claim 1 is characterized in that, said second predetermined value is 450 millivolts.
5. the oxygen storage capacity detection device of a ternary catalyzing unit is characterized in that, said device comprises: air inflow sampling unit, multiplier, accumulator, wherein,
Said air inflow sampling unit is used to obtain the charge flow rate at the predetermined instant motor;
Said multiplier is used for following physical quantity is multiplied each other: MAF (t
x), ABS (FR-1), MO2/Mair,
Wherein, MAF (t) is an engine intake airflow, and this variable changes in time; FR is the equivalent air fuel ratio, and this value is constant; MO2/Mair is the shared percentage of oxygen in the air, is constant;
Be the sampling period, t
xBe sampling instant, ABS is the function that carries out signed magnitude arithmetic(al);
Said accumulator is used for multiplier is calculated, and the catalyst converter oxygen storage capacity that the oxygen reaction begins constantly in the past, the oxygen reaction finishes constantly to the back adds up, and wherein, the voltage that preceding oxygen reaction constantly is preceding oxygen sensor signal rises and passes through the moment of first predetermined value; Back oxygen reaction constantly is the moment that second predetermined value is passed through in the rising of post oxygen sensor voltage of signals.
6. device according to claim 5 is characterized in that, said equivalent air fuel ratio is 14.7.
7. device according to claim 5 is characterized in that, said first predetermined value is 450 millivolts.
8. device according to claim 5 is characterized in that, said second predetermined value is 450 millivolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100503238A CN102650229B (en) | 2011-02-24 | 2011-02-24 | Method and device for detecting oxygen storage capacity of three-way catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100503238A CN102650229B (en) | 2011-02-24 | 2011-02-24 | Method and device for detecting oxygen storage capacity of three-way catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102650229A true CN102650229A (en) | 2012-08-29 |
| CN102650229B CN102650229B (en) | 2013-10-30 |
Family
ID=46692340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100503238A Expired - Fee Related CN102650229B (en) | 2011-02-24 | 2011-02-24 | Method and device for detecting oxygen storage capacity of three-way catalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102650229B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832305A (en) * | 2014-12-16 | 2015-08-12 | 北汽福田汽车股份有限公司 | Oxygen storage capacity detection method and system for automobile catalyst converter and vehicle |
| CN105673169A (en) * | 2016-01-27 | 2016-06-15 | 潍柴动力股份有限公司 | Method and device used for monitoring three-way catalyst in engine exhaust system |
| CN107208565A (en) * | 2015-01-28 | 2017-09-26 | 罗伯特·博世有限公司 | Method for the limiting value of the characteristic skews of voltage λ that determine lambda seeker |
| CN107676158A (en) * | 2017-09-19 | 2018-02-09 | 北京汽车研究总院有限公司 | The method for diagnosing faults and device of triple mode catalytic converter |
| CN110259553A (en) * | 2019-06-28 | 2019-09-20 | 潍柴动力股份有限公司 | A kind of calculation method, device and the electronic equipment of ternary catalyzing unit oxygen storage capacity |
| CN110284947A (en) * | 2019-06-28 | 2019-09-27 | 潍柴动力股份有限公司 | A kind of three-way catalytic converter aging detection method and device |
| CN111379637A (en) * | 2018-12-27 | 2020-07-07 | 罗伯特·博世有限公司 | Method for determining the maximum storage capacity of an exhaust gas component accumulator of a catalytic converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0546318A1 (en) * | 1991-12-10 | 1993-06-16 | Robert Bosch Gmbh | Method and device for the determination of the conversion efficiency of a catalyst |
| CN1363013A (en) * | 2000-02-16 | 2002-08-07 | 日产自动车株式会社 | Engine exhaust purifying device |
| KR100906881B1 (en) * | 2008-05-02 | 2009-07-08 | 현대자동차주식회사 | Front and rear oxygen sensor controlling and catalyzer monitoring method |
| CN101636568A (en) * | 2007-03-30 | 2010-01-27 | 丰田自动车株式会社 | Catalyst degradation determination device for internal combustion engine |
-
2011
- 2011-02-24 CN CN2011100503238A patent/CN102650229B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0546318A1 (en) * | 1991-12-10 | 1993-06-16 | Robert Bosch Gmbh | Method and device for the determination of the conversion efficiency of a catalyst |
| CN1363013A (en) * | 2000-02-16 | 2002-08-07 | 日产自动车株式会社 | Engine exhaust purifying device |
| CN101636568A (en) * | 2007-03-30 | 2010-01-27 | 丰田自动车株式会社 | Catalyst degradation determination device for internal combustion engine |
| KR100906881B1 (en) * | 2008-05-02 | 2009-07-08 | 현대자동차주식회사 | Front and rear oxygen sensor controlling and catalyzer monitoring method |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832305A (en) * | 2014-12-16 | 2015-08-12 | 北汽福田汽车股份有限公司 | Oxygen storage capacity detection method and system for automobile catalyst converter and vehicle |
| CN104832305B (en) * | 2014-12-16 | 2018-03-27 | 北汽福田汽车股份有限公司 | Oxygen storage capacity detection method, system and the vehicle of automobile catalytic device |
| CN107208565A (en) * | 2015-01-28 | 2017-09-26 | 罗伯特·博世有限公司 | Method for the limiting value of the characteristic skews of voltage λ that determine lambda seeker |
| CN105673169A (en) * | 2016-01-27 | 2016-06-15 | 潍柴动力股份有限公司 | Method and device used for monitoring three-way catalyst in engine exhaust system |
| CN105673169B (en) * | 2016-01-27 | 2018-05-04 | 潍柴动力股份有限公司 | A kind of method and device for being used to monitor ternary catalyzing unit in engine exhaust system |
| CN107676158A (en) * | 2017-09-19 | 2018-02-09 | 北京汽车研究总院有限公司 | The method for diagnosing faults and device of triple mode catalytic converter |
| CN111379637A (en) * | 2018-12-27 | 2020-07-07 | 罗伯特·博世有限公司 | Method for determining the maximum storage capacity of an exhaust gas component accumulator of a catalytic converter |
| CN111379637B (en) * | 2018-12-27 | 2024-03-19 | 罗伯特·博世有限公司 | Method for determining a maximum storage capacity of an exhaust gas component storage of a catalytic converter |
| CN110259553A (en) * | 2019-06-28 | 2019-09-20 | 潍柴动力股份有限公司 | A kind of calculation method, device and the electronic equipment of ternary catalyzing unit oxygen storage capacity |
| CN110284947A (en) * | 2019-06-28 | 2019-09-27 | 潍柴动力股份有限公司 | A kind of three-way catalytic converter aging detection method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102650229B (en) | 2013-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102650229B (en) | Method and device for detecting oxygen storage capacity of three-way catalyst | |
| JP6422343B2 (en) | Method and apparatus for monitoring the dynamic characteristics of a gas sensor in an internal combustion engine | |
| CN102192036B (en) | Internal combustion engine exhaust gas control apparatus and abnormality determining method thereof | |
| US8806928B2 (en) | Catalyst deterioration detection apparatus and catalyst deterioration detection method for internal combustion engine | |
| RU152376U1 (en) | EMISSION REDUCTION CONTROL SYSTEM | |
| US8756915B2 (en) | Integrated fuel catalyst monitor | |
| US9309799B2 (en) | Method and device for determining the oxygen storage capacity of an emission control system | |
| US20160123258A1 (en) | Upstream nox estimation | |
| US8146345B2 (en) | Normalizing oxygen storage capacity(OSC) for catalyst monitoring | |
| US20120125090A1 (en) | Method and system to diagnose exhaust gas sensor deterioration | |
| KR20180089301A (en) | Method for detecting an error in an scr system by means of an ammonia slip | |
| KR102406226B1 (en) | Method for detecting an error in an scr system by means of an ammonia slip | |
| KR101553087B1 (en) | Method and controller for checking an exhaust gas aftertreatment system of an internal combustion engine | |
| JP5924546B2 (en) | Filter failure detection device | |
| KR20180002058A (en) | Error detection in a scr-system by means of efficiency | |
| EP3401522B1 (en) | Exhaust gas control system for internal combustion engine and method of controlling exhaust gas control system for internal combustion engine | |
| CN105229284A (en) | Motor NOx model | |
| KR100774718B1 (en) | Oxygen control method of catalytic converter for vehicle | |
| CN102322324B (en) | Vehicle-mounted monitoring system and method for three-way catalytic converter for vehicle | |
| CN101620035B (en) | Method for testing oxygen storage capacity of automobile exhaust catalyzer | |
| CN113323747B (en) | Abnormality diagnosis of catalytic converter and electronic equipment | |
| US11274592B2 (en) | Catalyst deterioration diagnosis device and catalyst deterioration diagnosis method | |
| EP3663568A1 (en) | Exhaust gas purification apparatus for internal combustion engine | |
| CN202170825U (en) | On-vehicle monitoring system of vehicular three-way catalytic converter | |
| CN113803174B (en) | Engine control method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |