CN108930578A - The detection and guard method of DOC poisoning - Google Patents
The detection and guard method of DOC poisoning Download PDFInfo
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- CN108930578A CN108930578A CN201810680127.0A CN201810680127A CN108930578A CN 108930578 A CN108930578 A CN 108930578A CN 201810680127 A CN201810680127 A CN 201810680127A CN 108930578 A CN108930578 A CN 108930578A
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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
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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
- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/02—Catalytic activity of catalytic converters
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- 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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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to motor exhaust post-processing technology fields, and in particular to a kind of detection and guard method of DOC poisoning.Present invention seek to address that endangering engine after DOC poisoning uses safe technical problem.For this purpose, including the following steps: S12 the present invention provides the detection and guard method of a kind of DOC poisoning: the diesel oil that predetermined amount is sprayed into DOC makes the diesel oil of predetermined amount burn in DOC；S13: detect predetermined amount diesel oil burn in DOC after the actual heat value that generates；S14: the theoretical calorie value generated after actual heat value is burnt in DOC with the diesel oil of predetermined amount is compared, when actual heat value is less than theoretical calorie value and the difference of theoretical calorie value and actual heat value is greater than preset difference value, determine that DOC is poisoned, otherwise, it determines DOC is normal.The present invention by the diesel oil of predetermined amount burn in DOC generation actual heat value determine predetermined amount diesel oil whether can in DOC completely burned, when the diesel oil of predetermined amount cannot then determine DOC poisoning when the completely burned in DOC.
Description
Technical field
The present invention relates to motor exhaust post-processing technology fields, and in particular to a kind of detection of DOC poisoning and protection side
Method.
Background technique
What this part provided is only background information relevant to the disclosure, is not necessarily the prior art.
In Chinese large- and-medium size cities, motor vehicle exhaust emission has become the main source of atmospheric pollution, in order to reduce vehicle exhaust
The tail gas of influence to environment, engine discharge can successively pass through DOC (Diesel Oxidant Catalyst, oxidative diesel
Catalyst converter), DPF (Diesel Particle Filter, diesel particulate trap) and SCR (Selective Catalytic
Reduction, selective catalytic reduction) it is discharged into atmosphere after catalyst converter again, influence of the vehicle exhaust to environment is reduced with this,
In, DOC be used to be vented before being placed on DPF and SCR catalyst in carbon monoxide (CO) and hydrocarbon (HC) convert
At harmless water (H2And carbon dioxide (CO 0)2), and the nitric oxide (NO) in exhaust gas is oxidized to nitrogen dioxide (NO2),
Accelerate the fuel oil that subsequent SCR is ejected into the conversion rate and efficiency and catalysis oxidation of nitrogen oxides (NOx) before DOC, passes through
Temperature in the combustion rise DOC of fuel oil, so that early-stage preparations are done for DOC regeneration, still, if engine is contained using sulphur for a long time
Higher diesel oil and machine oil are measured, the SO in tail gas can be made2Platinum, palladium in DOC etc. urge lower generation SO3, SO3It reacts and produces with water
H2SO4, H2SO4With NH3(the NH that reaction production is not easily decomposed4)2SO4, (NH4)2SO4Being attached in DOC causes DOC " poisoning " occur
Phenomenon declines the catalytic efficiencies such as platinum, the palladium in DOC, and the decline of the catalytic efficiencies such as platinum, palladium causes diesel oil cannot be in DOC sufficiently
Burning also will cause post-processing clogging after long-time, threaten making for engine so that DOC efficiency of post treatment be caused to decline
With safety, and existing technology is only made whether the detection " be poisoned " to DOC, takes off to the DOC after " poisoning "
Sulphuring treatment and engine is carried out measure is effectively protected, therefore, there is no exclude post-processing caused by DOC " poisoning " to block
Phenomenon and engine are in DOC " poisoning " existing security risk afterwards.
Summary of the invention
The purpose of the present invention is to solve at least one above-mentioned problem, which is by the following technical programs
It realizes.
The present invention provides the detection and guard method of a kind of DOC poisoning, the detection and guard method of DOC poisoning include such as
Lower step: S12: the diesel oil that predetermined amount is sprayed into DOC makes the diesel oil of predetermined amount burn in DOC；S13: predetermined amount is detected
The actual heat value that diesel oil generates after burning in DOC；S14: after the diesel oil of actual heat value and predetermined amount is burnt in DOC
The theoretical calorie value of generation is compared, when actual heat value is less than theoretical calorie value and theoretical calorie value and actual heat value
When difference is greater than preset difference value, determine that DOC is poisoned, otherwise, it determines DOC is normal.
Preferably, before step S12 further include: S11: calibration is to the DOC prefixed time interval detected or default mileage
Interval executes step S12 after prefixed time interval or default mileage interval.
Preferably, after step S14 further include: S15: quoting the low efficiency failure of DOC after determining DOC poisoning and trigger
The low efficiency alarm of DOC.
Preferably, after step S15 further include: S16: carrying out initiative regeneration to DOC after the low efficiency alarm of DOC is triggered
Processing carries out desulfurization process to DOC by initiative regeneration.
Preferably, after step S16 further include: after S17:DOC completes desulfurization process, the efficiency value of DOC is detected, when DOC's
When efficiency value is not up to the first default efficiency value, judgement, which fails to the DOC desulfurization process carried out and triggers desulfurization process, is unsuccessfully warned
Report.
Preferably, SCR is provided with after DOC, after step S16 further include: after S18:DOC completes desulfurization process, detect SCR's
Efficiency value, when the efficiency value of SCR is not up to the second default efficiency value, judgement fails and triggers to the DOC desulfurization process carried out
Desulfurization process failed-event alert.
Preferably, the efficiency value for detecting SCR includes: to be detected in SCR when SCR post-processes motor exhaust in fact
Border participates in the amount of nitrogen oxides of reaction, the amount of nitrogen oxides reacted by actual participation and the nitrogen oxides for theoretically participating in reaction
The ratio of amount determines the efficiency value of SCR.
Preferably, DPF is additionally provided between DOC and SCR, after step S16 further include: after S19:DOC completes desulfurization process,
The upstream temperature value for detecting DPF determines at the desulfurization carried out to DOC when the upstream temperature value of DPF is not up to preset temperature value
Reason failure simultaneously triggers desulfurization process failed-event alert.
Preferably, after step S16 further include: after S20:DOC completes desulfurization process, it is default that the efficiency value of DOC reaches first
When the upstream temperature value that the efficiency value of efficiency value and SCR reach the second default efficiency value and DPF reaches preset temperature value, determine pair
The desulfurization process success that DOC is carried out, otherwise, it is determined that failing to the DOC desulfurization process carried out and triggering desulfurization process failed-event alert.
Preferably, after step S20 further include: S21: after desulfurization process failed-event alert is triggered, after preset time
Limit is carried out to engine and turns round operation, and issues the alarm safeguarded or replaced to DOC.
It will be appreciated to those of skill in the art that in the inventive solutions, by spraying into predetermined amount into DOC
Diesel oil so that the diesel oil of predetermined amount is burnt in DOC, by the diesel oil of predetermined amount burn in DOC generation actual heat value it is true
Determine predetermined amount diesel oil whether can in DOC completely burned, when the diesel oil of predetermined amount cannot then determine when the completely burned in DOC
There is intoxicating phenomenon in DOC.Specifically, the present invention is every prefixed time interval or the triggering of default mileage interval once to the master of DOC
Dynamic detection is burnt by the diesel oil sprayed after engine or the 7th atomizer sprays predetermined amount into DOC in DOC, when default
The diesel oil of amount burn generation after the burning-out of DOC internal combustion by the diesel oil that the temperature sensor in DOC detects predetermined amount in DOC
Actual heat value, the theoretical calorie value theoretically generated that the diesel oil of actual heat value and predetermined amount is burnt in DOC compare
Compared with when actual heat value is less than theoretical calorie value and the difference of theoretical calorie value and actual heat value is greater than preset difference value, then
Determine DOC occur intoxicating phenomenon cause predetermined amount diesel oil cannot in DOC completely burned, at this point, controller determine DOC occur
Intoxicating phenomenon and the low efficiency failure for quoting DOC are issued while controller quotes the low efficiency failure of DOC and are led to DOC
The instruction of dynamic regeneration treatment, by carrying out initiative regeneration realization to the desulfurization process of DOC to DOC, reducing DOC poisoning with this causes
After-treatment technics efficiency declines the harm to engine.
Further, after DOC completes initiative regeneration processing, the desulfurization effect of DOC is detected, if DOC and SCR
Efficiency be all satisfied and require and can satisfy preset temperature value carrying out the upstream temperature of DPF in regeneration process to DOC, then
Determine that DOC handles desulfurization success by initiative regeneration, if the efficiency of DOC or SCR is unsatisfactory for requiring or carrying out at regeneration to DOC
The upstream temperature of DPF is unsatisfactory for preset temperature value during reason, it is determined that DOC is failed and triggered by initiative regeneration processing desulfurization
Desulfurization failed-event alert, controller issue limit torsion instruction to engine after preset time and prompt driver to specified service
Stand DOC is further safeguarded or replacement processing.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the detection and guard method flow diagram that the DOC of one embodiment of the invention is poisoned.
Fig. 2 is the detection and guard method flow diagram that the DOC of another embodiment of the present invention is poisoned.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened is fully disclosed to those skilled in the art.It should be noted that the present invention by detection that DOC is poisoned and
Guard method is applied to diesel engine and an only preferred embodiment is described, and is not the detection to DOC of the present invention poisoning
With the limitation of guard method application range, for example, detection and guard method that DOC of the invention is poisoned can also be applied to other
Engine with similar structure, application range of this variation without departing from the DOC of the present invention detection being poisoned and guard method.
Fig. 1 is the detection and guard method flow diagram that the DOC of one embodiment of the invention is poisoned.
As shown in Figure 1, the present invention provides the detection and guard method of a kind of DOC poisoning, the detection and protection of DOC poisoning
Method includes the following steps: S12: the diesel oil that predetermined amount is sprayed into DOC makes the oxygen combustion in the diesel oil and DOC of predetermined amount；
S13: detect predetermined amount diesel oil burn in DOC after the actual heat value that generates；S14: by actual heat value and predetermined amount
The theoretical calorie value that diesel oil generates after burning in DOC is compared, when actual heat value is less than theoretical calorie value and theoretical heat
When the difference of magnitude and actual heat value is greater than preset difference value, determine that DOC is poisoned, otherwise, it determines DOC is normal.Of the invention
In technical solution, the diesel oil by spraying into predetermined amount into DOC makes the diesel oil of predetermined amount burn in DOC, passes through predetermined amount
Diesel oil burn in DOC generation actual heat value determine predetermined amount diesel oil whether can in DOC completely burned, work as predetermined amount
Diesel oil cannot in DOC when completely burned then determine DOC there is intoxicating phenomenon.Specifically, the present invention is every between preset time
Every or the triggering of default mileage interval once to the active detecting of DOC, by being sprayed after engine or the 7th atomizer is sprayed into DOC
The diesel oil for penetrating predetermined amount burns in DOC, when the diesel oil of predetermined amount passes through the temperature sensor in DOC after DOC internal combustion is burnt down
The diesel oil of detection predetermined amount burns the actual heat value of generation in DOC, by the diesel oil of actual heat value and predetermined amount in DOC
The theoretical calorie value generated in Theory of Combustion is compared, when actual heat value is less than theoretical calorie value and theoretical calorie value and reality
When the difference of border calorie value is greater than preset difference value, it is determined that intoxicating phenomenon, which occurs, in DOC causes the diesel oil of predetermined amount cannot be in DOC
Completely burned, at this point, controller determines that DOC is poisoned.
Fig. 2 is the detection and guard method flow diagram that the DOC of another embodiment of the present invention is poisoned.
As shown in Fig. 2, according to an embodiment of the invention, the detection and guard method of DOC poisoning include the following steps: S11:
To the DOC prefixed time interval detected or default mileage interval, prefixed time interval or default mileage interval can be with for calibration
It is demarcated according to the performance parameter of DOC, the performance parameter of engine and referring to previous empirical data, or real by emulation
It tests and obtains prefixed time interval and default mileage interval, details are not described herein for specific data, every prefixed time interval or presets
Step S12 is executed behind mileage interval: the diesel oil that predetermined amount is sprayed into DOC makes the diesel oil of predetermined amount burn in DOC, this step
Initiative regeneration processing step in the prior art can be used, i.e., is sprayed by spray or the 7th atomizer after engine into DOC
The diesel oil for penetrating predetermined amount makes it burn in DOC, when the diesel oil of predetermined amount executes step S13 after DOC internal combustion is burnt down: passing through
The diesel oil of temperature sensor detection predetermined amount in DOC burns the actual heat value of generation in DOC；Controller is according in DOC
Temperature sensor detection predetermined amount diesel oil burn in DOC generation actual heat value after execute step S14, wherein step
Rapid S14 specifically includes step S141: comparing actual heat value and whether is less than the diesel oil of predetermined amount and burns in DOC the theory of generation
Calorie value executes step S143 when actual heat value is more than or equal to theoretical calorie value: determining that DOC is normal and re-execute the steps
S11 executes step S142: the difference of more theoretical calorie value and actual heat value when actual heat value is less than theoretical calorie value
Whether preset difference value is greater than, wherein preset difference value can be obtained according to previous empirical data or by emulation experiment, work as reason
Step S143 is executed when being less than or equal to preset difference value by the difference of calorie value and actual heat value: determining that DOC is normal and holds again
Row step S11；Step S15 is executed when the difference of theoretical calorie value and actual heat value is greater than preset difference value: determining DOC failure
And quote the low efficiency failure of DOC and trigger the low efficiency alarm of DOC, wherein the low efficiency failure of DOC and the efficiency of DOC
Low alarm can be shown by control panel or be played by vehicle audio；It is executed after the low efficiency alarm of DOC is triggered
Step S16: carrying out initiative regeneration processing to DOC after the low efficiency alarm of DOC is triggered, and is carried out by initiative regeneration to DOC
Desulfurization process specifically improves the temperature in DOC by initiative regeneration, makes to be attached to the catalysis such as platinum in DOC, palladium by high temperature
(NH4) 2SO4 decomposition in agent falls off, to improve the catalytic efficiency of the catalyst such as platinum in DOC, palladium, completes the desulfurization to DOC
Processing；After executing step S17:DOC completion desulfurization process after DOC completes initiative regeneration and desulfurization process, the efficiency of DOC is detected
Value, when the efficiency value of DOC is not up to the first default efficiency value, judgement fails to the DOC desulfurization process carried out and triggers desulfurization
Processing failure alarm, wherein the efficiency value for detecting DOC can be by the reality of generation of the diesel oil above by predetermined amount in DOC
Border calorie value determines that the first default efficiency value can be by the theoretical heat of generation of the diesel oil above by predetermined amount in DOC
Value determine, according to actual heat value determine predetermined amount diesel oil can in DOC full combustion, with this detect DOC whether desulfurization
Success；Step is executed while whether desulfurization is successful by step S17 detection DOC or after step S17 detection DOC desulfurization success
After S18:DOC completes desulfurization process, the efficiency value of SCR is detected, when the efficiency value of SCR is not up to the second default efficiency value, is sentenced
It is fixed to fail to the DOC desulfurization process carried out and trigger desulfurization process failed-event alert, wherein DOC be mainly used for being vented in one
Carbonoxide (CO) and hydrocarbon (HC) are converted to harmless water (H2And carbon dioxide (CO 0)2), and by the nitrogen in exhaust gas
Oxide such as nitric oxide (NO) is oxidized to nitrogen dioxide (NO2), therefore, detect the nitrogen oxidation that actual participation is reacted in SCR
The efficiency value of SCR when object amount can post-process motor exhaust with indirect reaction SCR, the nitrogen oxygen reacted according to actual participation
Compound amount determines the efficiency value of SCR, determines the second default efficiency value according to the theoretical amount of nitrogen oxides for participating in reaction, passes through reality
The ratio for participating in the amount of nitrogen oxides of reaction and theoretically participating in the amount of nitrogen oxides of reaction determines the efficiency value of SCR, specifically,
By the way that NOx sensor is arranged in the rear and front end SCR, pass through the nitrogen of the rear and front end SCR by NOx sensor detection
Oxide amount determines the amount of nitrogen oxides that actual participation is reacted in SCR according to the amount of nitrogen oxides by the rear and front end SCR,
Whether desulfurization process is successful for the efficiency value and DOC for determining SCR with this；By step S17, step S18 detect DOC whether desulfurization
After executing step S19:DOC completion desulfurization process while success or after step S17 and step S18 detection DOC desulfurization success,
The upstream temperature value for detecting DPF determines at the desulfurization carried out to DOC when the upstream temperature value of DPF is not up to preset temperature value
Reason failure simultaneously triggers desulfurization process failed-event alert, and since DOC is set to the upstream of DPF, the heat that DOC initiative regeneration generates is used for
The initiative regeneration of DPF, the high temperature that DPF is generated by initiative regeneration burn up the carbon particle in DPF, therefore, pass through the upstream DPF temperature
The temperature value of the degree sensor detection upstream DPF can determine the calorie value of DOC release, when the heat of DOC release is unsatisfactory for DPF again
When raw heat, illustrate heat needed for DOC is unsatisfactory for dpf regeneration as the heat of the unsuccessful release of desulfurization, at this point, determining
DOC desulfurization is unsuccessful；Step is executed after step S17, step S18 and step S19 complete to the detection of DOC desulfurization success or not
S20, step S20 include step S201: when DOC complete desulfurization process after, the efficiency value of DOC reach the first default efficiency value and
When the upstream temperature value that the efficiency value of SCR reaches the second default efficiency value and DPF reaches preset temperature value, determine to carry out DOC
Desulfurization process success, and return to step S11 again, otherwise, execute step S202: determining at the desulfurization carried out to DOC
Reason failure simultaneously triggers desulfurization process failed-event alert；Step S21 is executed after the desulfurization process failed-event alert triggering carried out to DOC:
After desulfurization process failed-event alert is triggered, limit is carried out to engine after preset time and turns round operation, and issues and DOC is carried out
The alarm prompt driver that test is perhaps replaced further is safeguarded to specified service station to DOC or replacement processing.
It should be noted that step S17, step S18 and step in the detection and guard method of DOC poisoning of the present invention
After S19 can be listed in step S16, i.e., after DOC completes the desulfurization process of step S16, step S17, step S18 and step
S19 simultaneously detects the desulfurization effect of DOC, when at least one detection DOC is de- in step S17, step S18 and step S19
Then determine that DOC desulfurization fails after sulphur failure, then determines after step S17, step S18 and step S19 detect DOC desulfurization success
DOC desulfurization success, further, step S17, step S18 and step S19 can also be arranged successively to step S16, that is, be worked as
It after DOC completes the desulfurization process of step S16, is detected first by desulfurization effect of the step S17 to DOC, when step S17 is examined
Then determine that DOC desulfurization fails after surveying DOC desulfurization failure, then continue to execute step S18 after step S17 detection DOC desulfurization success,
Then determine that DOC desulfurization fails after step S18 detection DOC desulfurization failure, then continues after step S18 detection DOC desulfurization success
Step S19 is executed, then determines that DOC desulfurization fails after step S19 detection DOC desulfurization failure, when step S19 detects DOC desulfurization
DOC desulfurization success is then determined after success, is then returned to and is executed step S11: every between prefixed time interval or default mileage
Whether it is poisoned every rear detection DOC.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (10)
1. the detection and guard method of a kind of DOC poisoning, which is characterized in that the detection and guard method of the DOC poisoning include
Following steps:
S12: the diesel oil that predetermined amount is sprayed into the DOC makes the diesel oil of the predetermined amount burn in the DOC；
S13: detect the predetermined amount diesel oil burn in the DOC after the actual heat value that generates；
S14: the theoretical calorie value generated after the diesel oil of the actual heat value and the predetermined amount is burnt in the DOC into
Row compares, when the actual heat value is less than the difference of the theoretical calorie value and the theoretical calorie value and the actual heat value
When value is greater than preset difference value, the DOC poisoning is determined, otherwise, it determines the DOC is normal.
2. the detection and guard method of DOC poisoning according to claim 1, which is characterized in that before step S12 further include:
S11: calibration is to the DOC prefixed time interval detected or default mileage interval, every between the preset time
Every or the default mileage interval after execute step S12.
3. the detection and guard method of DOC poisoning according to claim 1, which is characterized in that after step S14 further include:
S15: quoting the low efficiency failure of the DOC after determining that the DOC is poisoned and triggers the low efficiency alarm of the DOC.
4. the detection and guard method of DOC poisoning according to claim 3, which is characterized in that after step S15 further include:
S16: carrying out initiative regeneration processing to the DOC after low efficiency alarm of the DOC is triggered, by actively again
It is raw that desulfurization process is carried out to the DOC.
5. the detection and guard method of DOC poisoning according to claim 4, which is characterized in that after step S16 further include:
S17: after the DOC completes desulfurization process, the efficiency value of the DOC is detected, when the efficiency value of the DOC is not up to first
When default efficiency value, judgement fails to the DOC desulfurization process carried out and triggers desulfurization process failed-event alert.
6. the detection and guard method of DOC poisoning according to claim 5, which is characterized in that be provided with after the DOC
After SCR, step S16 further include:
S18: after the DOC completes desulfurization process, the efficiency value of the SCR is detected, when the efficiency value of the SCR is not up to second
When default efficiency value, judgement fails to the DOC desulfurization process carried out and triggers the desulfurization process failed-event alert.
7. the detection and guard method of DOC poisoning according to claim 6, which is characterized in that detect the efficiency of the SCR
Value includes:
The detection amount of nitrogen oxides that actual participation is reacted in the SCR when the SCR post-processes motor exhaust,
The amount of nitrogen oxides reacted by actual participation and the ratio for theoretically participating in the amount of nitrogen oxides reacted determine the effect of the SCR
Rate value.
8. the detection and guard method of DOC poisoning according to claim 7, which is characterized in that the DOC and SCR
Between be additionally provided with DPF, after step S16 further include:
S19: after the DOC completes desulfurization process, the upstream temperature value of the DPF is detected, when the upstream temperature of the DPF
When value is not up to preset temperature value, judgement, which fails to the DOC desulfurization process carried out and triggers the desulfurization process, is unsuccessfully warned
Report.
9. the detection and guard method of DOC poisoning according to claim 8, which is characterized in that after step S16 further include:
S20: after the DOC completes desulfurization process, the efficiency value of the DOC reaches the described first default efficiency value and the SCR
Efficiency value when reaching the upstream temperature value of the described second default efficiency value and the DPF and reaching the preset temperature value,
The desulfurization process carried out to the DOC success is determined, otherwise, it is determined that failing to the DOC desulfurization process carried out and triggering institute
State desulfurization process failed-event alert.
10. the detection and guard method of DOC poisoning according to claim 9, which is characterized in that after step S20 further include:
S21: after the desulfurization process failed-event alert is triggered, limit is carried out to the engine after preset time and turns round behaviour
Make, and issues the alarm that the DOC is safeguarded or replaced.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961950A (en) * | 2022-05-10 | 2022-08-30 | 潍柴动力股份有限公司 | Active monitoring method, device and system for DOC sulfur poisoning |
| CN115045741A (en) * | 2021-03-09 | 2022-09-13 | 北京福田康明斯发动机有限公司 | DOC sulfur poisoning diagnosis method, electronic device, vehicle, and storage medium |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149011A (en) * | 2006-09-20 | 2008-03-26 | 通用汽车环球科技运作公司 | Apparatus and method to inject a reductant into an exhaust gas feedstream |
| CN101149010A (en) * | 2006-09-20 | 2008-03-26 | 通用汽车环球科技运作公司 | Method and apparatus to control injection of a reductant into an exhaust gas feedstream |
| CN103221649A (en) * | 2010-10-04 | 2013-07-24 | 万国引擎知识产权有限责任公司 | Diagnostics for hydrocarbon injection for filter regeneration |
| CN103261609A (en) * | 2010-12-16 | 2013-08-21 | 五十铃自动车株式会社 | Device for diagnosing causes of decreases in NOx conversion efficiency |
| CN103502595A (en) * | 2011-03-02 | 2014-01-08 | 标致·雪铁龙汽车公司 | Method for running diagnostics on an oxidation catalytic converter by measuring the level of nitrogen oxides downstream of a selective catalytic reduction member |
| CN103628956A (en) * | 2012-08-22 | 2014-03-12 | 现代自动车株式会社 | Method of determining doc regeneration cycle |
| CN104454085A (en) * | 2014-10-29 | 2015-03-25 | 凯龙高科技股份有限公司 | Oil injection combustion-supporting regeneration temperature control method for DPF diesel engine particle filter system |
| CN104508263A (en) * | 2012-06-21 | 2015-04-08 | 马克卡车公司 | Method for detecting abnormally frequent diesel particulate filter regeneration, engine and exhaust after treatment system, and warning system and method |
| CN105736101A (en) * | 2014-12-30 | 2016-07-06 | 卡明斯公司 | Nox Sensor Diagnostic For An Exhaust Aftertreatment System |
| CN105745408A (en) * | 2015-11-25 | 2016-07-06 | 株式会社小松制作所 | Exhaust gas purification device |
| US20160237873A1 (en) * | 2013-10-04 | 2016-08-18 | Isuzu Motors Limited | Diagnostic device |
| CN105937429A (en) * | 2015-03-06 | 2016-09-14 | 丰田自动车株式会社 | Catalyst degradation diagnosing device |
| CN107044325A (en) * | 2017-06-15 | 2017-08-15 | 无锡威孚力达催化净化器有限责任公司 | The monitoring method of DOC temperature rise models, monitoring device and system in diesel engine after treatment |
| CN104603410B (en) * | 2012-06-13 | 2017-10-13 | 马克卡车公司 | Exhaust after treatment system, the method for monitoring part therein and its controller |
-
2018
- 2018-06-27 CN CN201810680127.0A patent/CN108930578B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149010A (en) * | 2006-09-20 | 2008-03-26 | 通用汽车环球科技运作公司 | Method and apparatus to control injection of a reductant into an exhaust gas feedstream |
| CN101149011A (en) * | 2006-09-20 | 2008-03-26 | 通用汽车环球科技运作公司 | Apparatus and method to inject a reductant into an exhaust gas feedstream |
| CN103221649A (en) * | 2010-10-04 | 2013-07-24 | 万国引擎知识产权有限责任公司 | Diagnostics for hydrocarbon injection for filter regeneration |
| CN103261609A (en) * | 2010-12-16 | 2013-08-21 | 五十铃自动车株式会社 | Device for diagnosing causes of decreases in NOx conversion efficiency |
| CN103502595A (en) * | 2011-03-02 | 2014-01-08 | 标致·雪铁龙汽车公司 | Method for running diagnostics on an oxidation catalytic converter by measuring the level of nitrogen oxides downstream of a selective catalytic reduction member |
| CN104603410B (en) * | 2012-06-13 | 2017-10-13 | 马克卡车公司 | Exhaust after treatment system, the method for monitoring part therein and its controller |
| CN104508263A (en) * | 2012-06-21 | 2015-04-08 | 马克卡车公司 | Method for detecting abnormally frequent diesel particulate filter regeneration, engine and exhaust after treatment system, and warning system and method |
| CN103628956A (en) * | 2012-08-22 | 2014-03-12 | 现代自动车株式会社 | Method of determining doc regeneration cycle |
| US20160237873A1 (en) * | 2013-10-04 | 2016-08-18 | Isuzu Motors Limited | Diagnostic device |
| CN104454085A (en) * | 2014-10-29 | 2015-03-25 | 凯龙高科技股份有限公司 | Oil injection combustion-supporting regeneration temperature control method for DPF diesel engine particle filter system |
| CN105736101A (en) * | 2014-12-30 | 2016-07-06 | 卡明斯公司 | Nox Sensor Diagnostic For An Exhaust Aftertreatment System |
| CN105937429A (en) * | 2015-03-06 | 2016-09-14 | 丰田自动车株式会社 | Catalyst degradation diagnosing device |
| CN105745408A (en) * | 2015-11-25 | 2016-07-06 | 株式会社小松制作所 | Exhaust gas purification device |
| CN107044325A (en) * | 2017-06-15 | 2017-08-15 | 无锡威孚力达催化净化器有限责任公司 | The monitoring method of DOC temperature rise models, monitoring device and system in diesel engine after treatment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045741A (en) * | 2021-03-09 | 2022-09-13 | 北京福田康明斯发动机有限公司 | DOC sulfur poisoning diagnosis method, electronic device, vehicle, and storage medium |
| CN115045741B (en) * | 2021-03-09 | 2023-07-25 | 北京福田康明斯发动机有限公司 | DOC sulfur poisoning diagnosis method, electronic device, vehicle, and storage medium |
| CN114961950A (en) * | 2022-05-10 | 2022-08-30 | 潍柴动力股份有限公司 | Active monitoring method, device and system for DOC sulfur poisoning |
| CN114961950B (en) * | 2022-05-10 | 2023-12-15 | 潍柴动力股份有限公司 | Active monitoring method, device and system for DOC sulfur poisoning |
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