CN114033534A - SCR conversion efficiency recovery method and device and vehicle - Google Patents
SCR conversion efficiency recovery method and device and vehicle Download PDFInfo
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- CN114033534A CN114033534A CN202111400361.1A CN202111400361A CN114033534A CN 114033534 A CN114033534 A CN 114033534A CN 202111400361 A CN202111400361 A CN 202111400361A CN 114033534 A CN114033534 A CN 114033534A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 238
- 238000000034 method Methods 0.000 title claims abstract description 69
- 238000011084 recovery Methods 0.000 title claims description 36
- 230000008929 regeneration Effects 0.000 claims abstract description 118
- 238000011069 regeneration method Methods 0.000 claims abstract description 118
- 238000003745 diagnosis Methods 0.000 claims abstract description 34
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims description 50
- 239000007924 injection Substances 0.000 claims description 50
- 238000004364 calculation method Methods 0.000 claims description 15
- 238000012805 post-processing Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 13
- 239000000446 fuel Substances 0.000 description 11
- 238000002425 crystallisation Methods 0.000 description 10
- 230000008025 crystallization Effects 0.000 description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- 231100000572 poisoning Toxicity 0.000 description 9
- 230000000607 poisoning effect Effects 0.000 description 9
- 229910052717 sulfur Inorganic materials 0.000 description 9
- 239000011593 sulfur Substances 0.000 description 9
- 230000001960 triggered effect Effects 0.000 description 6
- 230000035876 healing Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
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- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
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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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using 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
- Y02T10/12—Improving ICE efficiencies
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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Abstract
The embodiment of the invention discloses a method and a device for recovering SCR conversion efficiency and a vehicle. The method for recovering the SCR conversion efficiency comprises the steps that after a vehicle reports an NOx emission standard exceeding fault and a driving regeneration triggering condition is determined to be met, the first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is met in the driving process of the vehicle is obtained; if the first SCR conversion efficiency is smaller than or equal to a preset SCR conversion efficiency threshold value, triggering high-temperature driving regeneration, and obtaining a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached; determining whether SCR conversion efficiency of the vehicle aftertreatment system is restored according to the second SCR conversion efficiency. According to the technical scheme of the embodiment of the invention, the fault that the NOx emission exceeds 1.2 is timely processed during the running of the vehicle, the SCR conversion efficiency of the post-processing system is effectively recovered, and the labor cost is saved.
Description
Technical Field
The embodiment of the invention relates to the technical field of engine control, in particular to a method and a device for recovering SCR conversion efficiency and a vehicle.
Background
In the national six diesel engine products, the faults of NOx emission exceeding 1.2g/(kw.h) caused by SCR system crystallization, urea nozzle crystallization, sulfur poisoning of an aftertreatment device and the like frequently occur in the current market. When the SCR conversion efficiency is low and the NOx emission standard exceeding fault occurs, namely, after a vehicle standard exceeding fault lamp is turned on, a vehicle owner generally selects to go to a service station for maintenance, and then maintenance service personnel manually perform parking regeneration to eliminate crystallization and sulfur poisoning so as to improve the SCR conversion efficiency, waste manpower cost and increase fault frequency, thereby causing market public praise reduction and economic cost increase.
Disclosure of Invention
The embodiment of the invention provides a method and a device for recovering SCR conversion efficiency and a vehicle, which are used for timely treating the fault that NOx emission exceeds 1.2 during vehicle running, effectively recovering the SCR conversion efficiency of an after-treatment system and saving labor cost.
In a first aspect, an embodiment of the present invention provides an SCR conversion efficiency recovery method, including:
after the vehicle reports the NOx emission standard exceeding fault and the driving regeneration triggering condition is determined to be met, acquiring first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is met in the driving process of the vehicle;
if the first SCR conversion efficiency is smaller than or equal to a preset SCR conversion efficiency threshold value, triggering high-temperature driving regeneration, and obtaining a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached;
determining whether SCR conversion efficiency of the vehicle aftertreatment system is restored according to the second SCR conversion efficiency.
Further, after the vehicle reports the NOx emission exceeding fault, the method further comprises the following steps:
determining the fault timing duration of the reported NOx emission standard exceeding fault through a timer, or determining the calculation times of SCR conversion efficiency through a counter;
the running regeneration triggering condition comprises that the fault timing duration is greater than a preset fault timing duration threshold, or the calculation times are greater than a preset time threshold.
Further, before obtaining the first SCR conversion efficiency after reaching the emission standard exceeding fault diagnosis condition in the vehicle driving process, the method further includes:
and triggering the traveling crane for regeneration, and acquiring the temperature of the first regeneration oil injection stage.
Further, after triggering the high-temperature driving regeneration, the method further comprises the following steps:
and acquiring a second regeneration oil injection stage temperature, wherein the first regeneration oil injection stage temperature is less than the second regeneration oil injection stage temperature, and the second regeneration oil injection stage temperature is less than a preset regeneration oil injection stage temperature threshold value.
Further, when the vehicle reports the NOx emission exceeding fault, the method further comprises the following steps:
determining that the vehicle does not report an aftertreatment system fault, wherein the aftertreatment system fault comprises an aftertreatment voltage build-up failure, a sensor fault or an actuator line fault.
Further, after obtaining the first SCR conversion efficiency after reaching the emission standard exceeding fault diagnosis condition in the vehicle driving process, the method further includes:
and if the first SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered.
Further, determining whether SCR conversion efficiency of the vehicle aftertreatment system is restored based on the second SCR conversion efficiency includes:
and if the second SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered.
Further, the SCR conversion efficiency recovery method further includes:
controlling a timer and a counter to zero after determining that SCR conversion efficiency of the vehicle aftertreatment system is restored.
In a second aspect, an embodiment of the present invention further provides an SCR conversion efficiency recovery device, including:
the first SCR conversion efficiency acquisition module is used for acquiring first SCR conversion efficiency after the vehicle reports the NOx emission exceeding fault and the condition of emission exceeding fault diagnosis is met in the vehicle driving process after the condition that the vehicle driving regeneration triggering condition is met is determined;
the second SCR conversion efficiency acquisition module is used for triggering high-temperature driving regeneration if the first SCR conversion efficiency is less than or equal to a preset SCR conversion efficiency threshold value, and acquiring second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached;
and the SCR conversion efficiency recovery module is used for determining whether the SCR conversion efficiency of the vehicle aftertreatment system is recovered according to the second SCR conversion efficiency.
In a third aspect, the embodiment of the invention further provides a vehicle, and the vehicle comprises the SCR conversion efficiency recovery device provided by the embodiment of the second aspect of the invention.
According to the technical scheme of the embodiment of the invention, after the vehicle reports the NOx emission standard exceeding fault and the condition of driving regeneration triggering is determined to be met, the first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached in the driving process of the vehicle is obtained; if the first SCR conversion efficiency is smaller than or equal to a preset SCR conversion efficiency threshold value, triggering high-temperature driving regeneration, and obtaining a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached; determining whether SCR conversion efficiency of the vehicle aftertreatment system is restored according to the second SCR conversion efficiency. The problems that after the SCR conversion efficiency is low and the NOx emission exceeds the standard, parking regeneration is carried out manually, crystallization and sulfur poisoning are eliminated, the SCR conversion efficiency is improved, labor cost is wasted, the frequency of faults is increased, market public praise is lowered, and economic cost is increased are solved, the NOx emission exceeds 1.2 during running of a vehicle is timely processed, the SCR conversion efficiency of an after-treatment system is effectively recovered, and the labor cost is saved.
Drawings
FIG. 1 is a flow chart of a method for recovering SCR conversion efficiency according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for recovering SCR conversion efficiency according to a second embodiment of the present invention;
fig. 3 is a structural diagram of an SCR conversion efficiency recovery device according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example one
Fig. 1 is a flowchart of an SCR conversion efficiency recovery method according to an embodiment of the present invention, which is applicable to a case where a NOx emission standard exceeding fault is reported for automatic fault recovery after slight crystallization or sulfur poisoning of vehicle aftertreatment occurs, and the SCR conversion efficiency recovery method may be implemented by an SCR conversion efficiency recovery device, and the SCR conversion efficiency recovery device may be implemented in software and/or hardware.
The SCR conversion efficiency recovery method specifically comprises the following steps:
s110, after the vehicle reports the NOx emission standard exceeding fault and the driving regeneration triggering condition is determined to be met, the first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is achieved in the driving process of the vehicle is obtained.
The vehicle reports the NOx emission standard exceeding fault, namely the emission standard exceeding 1.2 fault, and the fault is usually displayed on a vehicle instrument panel through a fault lamp.
The fault with the emission exceeding 1.2 is that the national six-diesel engine performs a specified test cycle under the test conditions specified by the regulations, and the total amount of NOx pollutants exceeds 1.2g/(kw.h), which indicates that the conversion efficiency of the aftertreatment SCR system is cracked and does not meet the requirements of the regulations.
On the basis, when the vehicle reports the NOx emission standard exceeding fault, the method further comprises the following steps: determining that the vehicle does not report an aftertreatment system fault, wherein the aftertreatment system fault comprises an aftertreatment voltage build-up failure, a sensor fault or an actuator line fault.
Specifically, when the vehicle reports the NOx emission standard exceeding fault, it is determined that the vehicle does not report the post-processing build-up pressure failure, the sensor fault or the actuator line fault, so as to eliminate the fault interference in other aspects, and then the technical scheme of the embodiment is used for automatic fault healing.
Further, on the basis of the above embodiment, after the vehicle reports the NOx emission exceeding fault, the method further includes: determining the fault timing duration of the reported NOx emission exceeding fault through a timer, or determining the number of times of calculating the SCR conversion efficiency after the reported NOx emission exceeding fault through a counter; the running regeneration triggering condition comprises that the fault timing duration is greater than a preset fault timing duration threshold, or the calculation times of the SCR conversion efficiency are greater than a preset time threshold.
The method comprises the steps that a timer and a counter are arranged in a vehicle, after the vehicle reports the NOx emission exceeding fault, the timer is started to start timing after the NOx emission exceeding fault is reported, and the fault timing duration of the NOx emission exceeding fault is determined; or after the vehicle reports the NOx emission standard exceeding fault, starting a counter to count after the NOx emission standard exceeding fault is reported, and determining the calculation times of the SCR conversion efficiency after the NOx emission standard exceeding fault is reported.
It is understood that after the vehicle reports the NOx emission exceeding fault, either the timer or the counter may be started, or both the timer and the counter may be started, and the embodiment does not impose any limitation on the driving regeneration triggering condition.
On the basis of saving energy and improving efficiency, the driving regeneration triggering condition in the embodiment can be determined by the fault timing duration of the fault reporting the NOx emission exceeding the standard, and can also be determined by the calculation frequency of the SCR conversion efficiency.
Specifically, after the vehicle reports the NOx emission exceeding fault, whether the vehicle determines that the driving regeneration triggering condition is met is judged, that is, the driving regeneration triggering condition is judged by determining whether the fault timing duration of the NOx emission exceeding fault is greater than a preset fault timing duration threshold or not, or determining whether the calculated frequency of the SCR conversion efficiency after the NOx emission exceeding fault is greater than a preset frequency threshold or not.
And when the fault timing time length of the reported NOx emission exceeding fault is larger than a preset fault timing time length threshold, or the calculated times of the SCR conversion efficiency after the reported NOx emission exceeding fault is larger than a preset time threshold, determining that the vehicle meets the driving regeneration triggering condition, and triggering the driving regeneration.
On the basis of the above embodiment, before obtaining the first SCR conversion efficiency after reaching the emission standard exceeding fault diagnosis condition during the driving of the vehicle, the method further includes: and triggering the traveling crane for regeneration, and acquiring the temperature of the first regeneration oil injection stage.
The diagnosis conditions of the over-standard emission fault include that the engine exhaust temperature is within a certain range, the mass flow of upstream NOx measured by an upstream NOx sensor arranged at the upstream of the SCR system is within a certain range, the current exhaust gas flow obtained by performing integral calculation on the concentration of the upstream and downstream nitrogen oxides is within a certain range, and the like.
The first regeneration fuel injection stage temperature is the DPF temperature of the regeneration fuel injection stage obtained after the vehicle triggers the driving regeneration, and optionally, the first regeneration fuel injection stage temperature may be pre-calibrated to 600 ℃.
Further, on the basis of the above embodiment, after obtaining the first SCR conversion efficiency after reaching the emission standard exceeding fault diagnosis condition during driving of the vehicle, the method further includes: and if the first SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered. On the basis of the above, the control timer and the counter are set to zero after determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered.
And S120, if the first SCR conversion efficiency is smaller than or equal to a preset SCR conversion efficiency threshold, triggering high-temperature driving regeneration, and obtaining a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached.
On the basis of the above embodiment, after the high-temperature driving regeneration is triggered, the method further includes: and acquiring a second regeneration oil injection stage temperature, wherein the first regeneration oil injection stage temperature is less than the second regeneration oil injection stage temperature, and the second regeneration oil injection stage temperature is less than a preset regeneration oil injection stage temperature threshold value.
And the temperature of the second regeneration oil injection stage is the regeneration temperature determined according to the ratio of the second SCR conversion efficiency to the preset SCR conversion efficiency threshold value.
It is understood that the maximum value of the second regeneration injection stage temperature does not exceed the maximum value of the preset regeneration injection stage temperature based on the DPF hardware protection consideration, that is, the preset regeneration injection stage temperature threshold is the maximum value of the preset regeneration injection stage temperature.
S130, determining whether the SCR conversion efficiency of the vehicle aftertreatment system is recovered according to the second SCR conversion efficiency.
On the basis of the above embodiment, determining whether the SCR conversion efficiency of the vehicle aftertreatment system is recovered according to the second SCR conversion efficiency includes: and if the second SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered. On the basis of the above, the control timer and the counter are set to zero after determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered.
And if the second SCR conversion efficiency is less than or equal to the preset SCR conversion efficiency threshold, determining that the vehicle needs to be further maintained at a service station, reporting information that the SCR conversion efficiency of the vehicle post-processing system is not recovered, namely, the SCR conversion efficiency of the vehicle post-processing system cannot be automatically recovered, so that the fault cure of the vehicle reporting that the NOx emission exceeds the standard is completed.
According to the technical scheme of the embodiment of the invention, after the vehicle reports the NOx emission standard exceeding fault and the condition of driving regeneration triggering is determined to be met, the first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached in the driving process of the vehicle is obtained; if the first SCR conversion efficiency is smaller than or equal to a preset SCR conversion efficiency threshold value, triggering high-temperature driving regeneration, and obtaining a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached; determining whether SCR conversion efficiency of the vehicle aftertreatment system is restored according to the second SCR conversion efficiency. The problems that after the SCR conversion efficiency is low and the NOx emission exceeds the standard, parking regeneration is carried out manually, crystallization and sulfur poisoning are eliminated, the SCR conversion efficiency is improved, labor cost is wasted, the frequency of faults is increased, market public praise is lowered, and economic cost is increased are solved, the NOx emission exceeds 1.2 during running of a vehicle is timely processed, the SCR conversion efficiency of an after-treatment system is effectively recovered, and the labor cost is saved.
Example two
Fig. 2 is a flowchart of a method for recovering SCR conversion efficiency according to a second embodiment of the present invention, which is optimized based on the second embodiment.
Correspondingly, the method of the embodiment specifically includes:
and S210, reporting the NOx emission standard exceeding fault by the vehicle.
On the basis of the above embodiment, when the vehicle reports the NOx emission exceeding fault, the method further comprises the following steps: determining that the vehicle does not report an aftertreatment system fault, wherein the aftertreatment system fault comprises an aftertreatment voltage build-up failure, a sensor fault or an actuator line fault.
When the vehicle reports the NOx emission overproof fault, if the vehicle is determined to have aftertreatment voltage build-up failure, sensor fault or actuator line fault and the like, automatic fault healing is not performed by the technical scheme of the embodiment, and after other faults of the vehicle are eliminated, automatic fault healing is performed by the technical scheme of the embodiment.
S211, determining the fault timing time length of the reported NOx emission standard exceeding fault through a timer, or determining the calculation times of SCR conversion efficiency through a counter, and determining that the driving regeneration triggering condition is met according to the fault timing time length and the calculation times.
The running regeneration triggering condition comprises that the fault timing duration is greater than a preset fault timing duration threshold, or the calculation times are greater than a preset time threshold.
The preset fault timing duration threshold may be the NCD primary torque limit timing duration, and the engine fault lamp NCD is an abbreviation of NOx Control diagnostics, which is an indicator lamp of a vehicle driver alarm system.
And storing the calculated times of SCR conversion efficiency after the NOx emission exceeding fault is reported in a storage space appointed by the vehicle, and setting the calculated times stored in the storage space appointed by the vehicle to be zero after the NOx emission exceeding fault is reported by the vehicle and cured.
And S212, triggering the traveling crane to regenerate, and acquiring the temperature of the first regeneration oil injection stage.
The running regeneration at the moment is the common running regeneration of the engine, after the running regeneration reaches a running regeneration triggering condition, the action of removing particles by burning the particles in the DPF and oxygen is called active regeneration, and the running regeneration is one of the active regeneration and is the action of performing the active regeneration in the running process of the vehicle.
Specifically, when the fault timing duration of the reported NOx emission exceeding fault is greater than a preset fault timing duration threshold, or the calculated times of the SCR conversion efficiency after the reported NOx emission exceeding fault is greater than a preset times threshold, it is determined that the vehicle meets the driving regeneration triggering condition, and driving regeneration is triggered. In addition, the first regeneration injection stage temperature T1 is obtained, and the temperature of the DPF during normal driving regeneration is about 600 ℃, so the first regeneration injection stage temperature T1 can be calibrated to 600 ℃.
S213, obtaining the first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached in the vehicle driving process.
Specifically, in the driving process of the vehicle, if the emission standard exceeding fault diagnosis condition is met, the SCR conversion efficiency is calculated, and then the first SCR conversion efficiency is obtained. The specific calculation method of the SCR conversion efficiency may be selected and obtained by those skilled in the art according to actual conditions, and the calculation method of the SCR conversion efficiency is not limited in any way in this embodiment.
S214, judging whether the first SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, if so, executing a step S218, and if not, executing a step S215.
The preset SCR conversion efficiency threshold value can be determined according to the current exhaust gas flow and exhaust gas temperature and the MAP table of the SCR conversion efficiency, the current exhaust gas flow and exhaust gas temperature and the MAP table of the SCR conversion efficiency can be stored in a vehicle aftertreatment system in advance, and can be calibrated in advance according to different engines.
In this embodiment, a preset SCR conversion efficiency threshold of the current vehicle is determined according to the MAP table of the current exhaust gas flow and exhaust gas temperature and the SCR conversion efficiency, and a relationship between the actual conversion efficiency of the SCR system and the preset SCR conversion efficiency threshold at the current exhaust gas flow and exhaust gas temperature is determined by comparing the preset SCR conversion efficiency threshold with the first SCR conversion efficiency.
And S215, triggering high-temperature driving regeneration, and obtaining the second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached.
Compared with the common traveling regeneration, the high-temperature traveling regeneration has the advantages that the oil injection amount in the regeneration oil injection stage is larger, and the reaction temperature in the DPF is higher than the regeneration temperature of the common traveling regeneration.
On the basis of the above embodiment, after the high-temperature driving regeneration is triggered, the method further includes: and acquiring a second regeneration oil injection stage temperature, wherein the first regeneration oil injection stage temperature is less than the second regeneration oil injection stage temperature, and the second regeneration oil injection stage temperature is less than a preset regeneration oil injection stage temperature threshold value.
Specifically, if the first SCR conversion efficiency is less than or equal to a preset SCR conversion efficiency threshold, high-temperature driving regeneration is triggered to obtain a second regeneration fuel injection stage temperature T2, where the second regeneration fuel injection stage temperature T2 is a regeneration temperature determined according to a ratio of the second SCR conversion efficiency to the preset SCR conversion efficiency threshold, and the smaller the second SCR conversion efficiency is, the higher the second regeneration fuel injection stage temperature T2 is, based on consideration of DPF hardware protection, the maximum value does not exceed the preset regeneration fuel injection stage temperature threshold Tmax, at this time, the first regeneration fuel injection stage temperature T1 is less than the second regeneration fuel injection stage temperature T2, and the second regeneration fuel injection stage temperature T2 is less than the preset regeneration fuel injection stage temperature threshold, that is, T1 is less than T2 is less than Tmax.
S216, judging whether the second SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, if so, executing a step S218, and if not, executing a step S217.
In this embodiment, a preset SCR conversion efficiency threshold of the current vehicle is determined by using a MAP table of the current exhaust gas flow and exhaust gas temperature and the SCR conversion efficiency, and a relationship between an actual conversion efficiency of the SCR system and the preset SCR conversion efficiency threshold at the current exhaust gas flow and exhaust gas temperature is determined by comparing the preset SCR conversion efficiency threshold with a second SCR conversion efficiency.
And S217, reporting information that the SCR conversion efficiency of the vehicle post-processing system is not recovered.
Specifically, if the second SCR conversion efficiency is less than or equal to the preset SCR conversion efficiency threshold, reporting information that the SCR conversion efficiency of the vehicle aftertreatment system is not recovered, that is, the vehicle needs to be serviced at a service station, and the SCR conversion efficiency of the vehicle aftertreatment system cannot be automatically recovered, so as to complete the fault cure when the vehicle reports that the NOx emission exceeds the standard.
S218, determining that the SCR conversion efficiency of the vehicle post-processing system is recovered, and executing step S219.
Specifically, if the second SCR conversion efficiency is greater than a preset SCR conversion efficiency threshold, it is determined that the SCR conversion efficiency of the vehicle aftertreatment system is recovered, that is, the SCR conversion efficiency of the vehicle aftertreatment system is automatically recovered, and the vehicle fault that the NOx emission exceeds the standard is automatically cured.
And S219, after the SCR conversion efficiency of the vehicle aftertreatment system is determined to be recovered, controlling a timer and a counter to be set to zero.
At present, when the SCR emission of vehicles in the market exceeds 1.2, and a fault lamp is on after the exceeding-standard fault is reported, a vehicle owner goes to a service station for maintenance. According to the technical scheme of the embodiment of the invention, when the SCR system conversion efficiency exceeds the standard in the running process of the vehicle, DPF driving regeneration is triggered to carry out high-temperature activation treatment on the post-treatment device, the NOx emission in the market is greatly reduced to exceed 1.2, the probability of automatic fault healing is increased, and particularly, slight crystallization or sulfur poisoning can be cured when the post-treatment of the vehicle occurs.
EXAMPLE III
Fig. 3 is a structural diagram of an SCR conversion efficiency recovery apparatus according to a third embodiment of the present invention, which is applicable to a case where a NOx emission standard exceeding fault is reported for automatic fault recovery after slight crystallization or sulfur poisoning occurs in vehicle aftertreatment.
As shown in fig. 3, the SCR conversion efficiency recovery apparatus includes: a first SCR conversion efficiency acquisition module 310, a second SCR conversion efficiency acquisition module 320, and an SCR conversion efficiency recovery module 330, wherein:
the first SCR conversion efficiency obtaining module 310 is configured to obtain a first SCR conversion efficiency after the vehicle reaches an emission standard exceeding fault diagnosis condition in a driving process of the vehicle after the vehicle reports an NOx emission standard exceeding fault and it is determined that a driving regeneration trigger condition is met;
a second SCR conversion efficiency obtaining module 320, configured to trigger high-temperature driving regeneration if the first SCR conversion efficiency is less than or equal to a preset SCR conversion efficiency threshold, and obtain a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached;
an SCR conversion efficiency recovery module 330 to determine whether SCR conversion efficiency of the vehicle aftertreatment system is recovered based on the second SCR conversion efficiency.
According to the SCR conversion efficiency recovery device, after the vehicle reports the NOx emission standard exceeding fault and the driving regeneration triggering condition is determined to be met, the first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is met in the driving process of the vehicle is obtained; if the first SCR conversion efficiency is smaller than or equal to a preset SCR conversion efficiency threshold value, triggering high-temperature driving regeneration, and obtaining a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached; determining whether SCR conversion efficiency of the vehicle aftertreatment system is restored according to the second SCR conversion efficiency. The problems that after the SCR conversion efficiency is low and the NOx emission exceeds the standard, parking regeneration is carried out manually, crystallization and sulfur poisoning are eliminated, the SCR conversion efficiency is improved, labor cost is wasted, the frequency of faults is increased, market public praise is lowered, and economic cost is increased are solved, the NOx emission exceeds 1.2 during running of a vehicle is timely processed, the SCR conversion efficiency of an after-treatment system is effectively recovered, and the labor cost is saved.
On the basis of the above embodiments, after the vehicle reports the NOx emission exceeding fault, the method further comprises the following steps:
determining the fault timing duration of the reported NOx emission standard exceeding fault through a timer, or determining the calculation times of SCR conversion efficiency through a counter;
the running regeneration triggering condition comprises that the fault timing duration is greater than a preset fault timing duration threshold, or the calculation times are greater than a preset time threshold.
On the basis of the above embodiments, before obtaining the first SCR conversion efficiency after reaching the emission standard exceeding fault diagnosis condition in the driving process of the vehicle, the method further includes:
and triggering the traveling crane for regeneration, and acquiring the temperature of the first regeneration oil injection stage.
On the basis of the above embodiments, after the high-temperature driving regeneration is triggered, the method further includes:
and acquiring a second regeneration oil injection stage temperature, wherein the first regeneration oil injection stage temperature is less than the second regeneration oil injection stage temperature, and the second regeneration oil injection stage temperature is less than a preset regeneration oil injection stage temperature threshold value.
On the basis of the above embodiments, when the vehicle reports the NOx emission exceeding fault, the method further includes:
determining that the vehicle does not report an aftertreatment system fault, wherein the aftertreatment system fault comprises an aftertreatment voltage build-up failure, a sensor fault or an actuator line fault.
On the basis of the above embodiments, after obtaining the first SCR conversion efficiency after reaching the emission standard exceeding fault diagnosis condition in the driving process of the vehicle, the method further includes:
and if the first SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered.
On the basis of the above embodiments, determining whether the SCR conversion efficiency of the vehicle aftertreatment system is recovered according to the second SCR conversion efficiency includes:
and if the second SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered.
On the basis of the foregoing embodiments, the SCR conversion efficiency recovery device further includes:
controlling a timer and a counter to zero after determining that SCR conversion efficiency of the vehicle aftertreatment system is restored.
The SCR conversion efficiency recovery device provided in each of the above embodiments may execute the SCR conversion efficiency recovery method provided in any of the embodiments of the present invention, and has functional modules and advantageous effects corresponding to the execution of the SCR conversion efficiency recovery method.
Example four
The vehicle provided by the fourth embodiment of the invention comprises the SCR conversion efficiency recovery device provided by the fourth embodiment of the invention.
According to the vehicle provided by the technical scheme of the embodiment of the invention, after the vehicle reports the NOx emission standard exceeding fault and the driving regeneration triggering condition is determined to be met, the first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is met in the driving process of the vehicle is obtained; if the first SCR conversion efficiency is smaller than or equal to a preset SCR conversion efficiency threshold value, triggering high-temperature driving regeneration, and obtaining a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached; determining whether SCR conversion efficiency of the vehicle aftertreatment system is restored according to the second SCR conversion efficiency. The problems that after the SCR conversion efficiency is low and the NOx emission exceeds the standard, parking regeneration is carried out manually, crystallization and sulfur poisoning are eliminated, the SCR conversion efficiency is improved, labor cost is wasted, the frequency of faults is increased, market public praise is lowered, and economic cost is increased are solved, the NOx emission exceeds 1.2 during running of a vehicle is timely processed, the SCR conversion efficiency of an after-treatment system is effectively recovered, and the labor cost is saved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An SCR conversion efficiency recovery method, comprising:
after the vehicle reports the NOx emission standard exceeding fault and the driving regeneration triggering condition is determined to be met, acquiring first SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is met in the driving process of the vehicle;
if the first SCR conversion efficiency is smaller than or equal to a preset SCR conversion efficiency threshold value, triggering high-temperature driving regeneration, and obtaining a second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached;
determining whether SCR conversion efficiency of the vehicle aftertreatment system is restored according to the second SCR conversion efficiency.
2. The SCR conversion efficiency recovery method according to claim 1, further comprising, after the vehicle reports an NOx emissions overproof fault:
determining the fault timing duration of the reported NOx emission standard exceeding fault through a timer, or determining the calculation times of SCR conversion efficiency through a counter;
the running regeneration triggering condition comprises that the fault timing duration is greater than a preset fault timing duration threshold, or the calculation times are greater than a preset time threshold.
3. The SCR conversion efficiency recovery method according to claim 1, further comprising, before obtaining the first SCR conversion efficiency after reaching the emission standard-exceeding fault diagnosis condition during driving of the vehicle:
and triggering the traveling crane for regeneration, and acquiring the temperature of the first regeneration oil injection stage.
4. The SCR conversion efficiency recovery method of claim 3, further comprising, after triggering high temperature drive regeneration:
and acquiring a second regeneration oil injection stage temperature, wherein the first regeneration oil injection stage temperature is less than the second regeneration oil injection stage temperature, and the second regeneration oil injection stage temperature is less than a preset regeneration oil injection stage temperature threshold value.
5. The SCR conversion efficiency recovery method according to claim 1, further comprising, at a time when a vehicle reports an NOx emissions overproof fault:
determining that the vehicle does not report an aftertreatment system fault, wherein the aftertreatment system fault comprises an aftertreatment voltage build-up failure, a sensor fault or an actuator line fault.
6. The SCR conversion efficiency recovery method according to claim 1, further comprising, after obtaining the first SCR conversion efficiency after reaching the emission standard exceeding fault diagnosis condition during driving of the vehicle:
and if the first SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered.
7. The SCR conversion efficiency recovery method of claim 1, wherein determining whether SCR conversion efficiency of the vehicle aftertreatment system is recovered based on the second SCR conversion efficiency comprises:
and if the second SCR conversion efficiency is larger than a preset SCR conversion efficiency threshold value, determining that the SCR conversion efficiency of the vehicle aftertreatment system is recovered.
8. The SCR conversion efficiency recovery method according to any one of claims 6 or 7, further comprising:
controlling a timer and a counter to zero after determining that SCR conversion efficiency of the vehicle aftertreatment system is restored.
9. An SCR conversion efficiency recovery device, comprising:
the first SCR conversion efficiency acquisition module is used for acquiring first SCR conversion efficiency after the vehicle reports the NOx emission exceeding fault and the condition of emission exceeding fault diagnosis is met in the vehicle driving process after the condition that the vehicle driving regeneration triggering condition is met is determined;
the second SCR conversion efficiency acquisition module is used for triggering high-temperature driving regeneration if the first SCR conversion efficiency is less than or equal to a preset SCR conversion efficiency threshold value, and acquiring second SCR conversion efficiency after the emission standard exceeding fault diagnosis condition is reached;
and the SCR conversion efficiency recovery module is used for determining whether the SCR conversion efficiency of the vehicle aftertreatment system is recovered according to the second SCR conversion efficiency.
10. A vehicle characterized by comprising the SCR conversion efficiency recovery device according to claim 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592955A (en) * | 2022-03-17 | 2022-06-07 | 潍柴动力股份有限公司 | Method, device, system and storage medium for determining sulfur poisoning of SCR carrier |
| CN114592950A (en) * | 2022-02-24 | 2022-06-07 | 上海和夏骏智科技有限公司 | SCR (Selective catalytic reduction) failure active treatment method based on DPF active regeneration and SCR failure control device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150033943A1 (en) * | 2012-03-13 | 2015-02-05 | Jaguar Land Rover Limited | Regeneration of diesel particle filter |
| US20150143799A1 (en) * | 2013-11-22 | 2015-05-28 | Hyundai Motor Company | SYSTEM AND METHOD OF DEFULFURIZING LEAN NOx TRAP |
| CN104727915A (en) * | 2013-12-20 | 2015-06-24 | 福特环球技术公司 | Method to diagnose SCR catalyst |
| CN110566318A (en) * | 2019-09-30 | 2019-12-13 | 潍柴动力股份有限公司 | Engine tail gas treatment system and treatment method |
| CN110700926A (en) * | 2019-11-25 | 2020-01-17 | 东风商用车有限公司 | Control method for realizing SCR desulfurization regeneration |
| CN112177714A (en) * | 2020-09-27 | 2021-01-05 | 潍柴动力股份有限公司 | SCR system conversion rate monitoring method, device, equipment and storage medium |
| CN112213449A (en) * | 2020-10-10 | 2021-01-12 | 潍柴动力股份有限公司 | Method for judging deterioration of nitrogen-oxygen sensor |
| CN112412597A (en) * | 2019-08-21 | 2021-02-26 | 日本碍子株式会社 | Catalyst deterioration diagnosis system and catalyst deterioration diagnosis method |
| CN112648055A (en) * | 2020-12-10 | 2021-04-13 | 潍柴动力股份有限公司 | Method, device, equipment and medium for detecting reliability of nitrogen oxide sensor |
| CN112664302A (en) * | 2020-12-24 | 2021-04-16 | 潍柴动力股份有限公司 | Method for monitoring catalyst poisoning of diesel engine aftertreatment system |
| CN112696251A (en) * | 2020-12-29 | 2021-04-23 | 潍柴动力股份有限公司 | SCR conversion efficiency recovery method and device and vehicle |
| CN113482749A (en) * | 2021-08-02 | 2021-10-08 | 无锡伟博汽车科技有限公司 | Method for improving SCR conversion efficiency |
| CN113669143A (en) * | 2021-09-24 | 2021-11-19 | 一汽解放汽车有限公司 | Performance detection method, detection device and medium for tail gas aftertreatment system |
-
2021
- 2021-11-24 CN CN202111400361.1A patent/CN114033534A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150033943A1 (en) * | 2012-03-13 | 2015-02-05 | Jaguar Land Rover Limited | Regeneration of diesel particle filter |
| US20150143799A1 (en) * | 2013-11-22 | 2015-05-28 | Hyundai Motor Company | SYSTEM AND METHOD OF DEFULFURIZING LEAN NOx TRAP |
| CN104727915A (en) * | 2013-12-20 | 2015-06-24 | 福特环球技术公司 | Method to diagnose SCR catalyst |
| CN112412597A (en) * | 2019-08-21 | 2021-02-26 | 日本碍子株式会社 | Catalyst deterioration diagnosis system and catalyst deterioration diagnosis method |
| CN110566318A (en) * | 2019-09-30 | 2019-12-13 | 潍柴动力股份有限公司 | Engine tail gas treatment system and treatment method |
| CN110700926A (en) * | 2019-11-25 | 2020-01-17 | 东风商用车有限公司 | Control method for realizing SCR desulfurization regeneration |
| CN112177714A (en) * | 2020-09-27 | 2021-01-05 | 潍柴动力股份有限公司 | SCR system conversion rate monitoring method, device, equipment and storage medium |
| CN112213449A (en) * | 2020-10-10 | 2021-01-12 | 潍柴动力股份有限公司 | Method for judging deterioration of nitrogen-oxygen sensor |
| CN112648055A (en) * | 2020-12-10 | 2021-04-13 | 潍柴动力股份有限公司 | Method, device, equipment and medium for detecting reliability of nitrogen oxide sensor |
| CN112664302A (en) * | 2020-12-24 | 2021-04-16 | 潍柴动力股份有限公司 | Method for monitoring catalyst poisoning of diesel engine aftertreatment system |
| CN112696251A (en) * | 2020-12-29 | 2021-04-23 | 潍柴动力股份有限公司 | SCR conversion efficiency recovery method and device and vehicle |
| CN113482749A (en) * | 2021-08-02 | 2021-10-08 | 无锡伟博汽车科技有限公司 | Method for improving SCR conversion efficiency |
| CN113669143A (en) * | 2021-09-24 | 2021-11-19 | 一汽解放汽车有限公司 | Performance detection method, detection device and medium for tail gas aftertreatment system |
Non-Patent Citations (1)
| Title |
|---|
| 梁国安等 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592950A (en) * | 2022-02-24 | 2022-06-07 | 上海和夏骏智科技有限公司 | SCR (Selective catalytic reduction) failure active treatment method based on DPF active regeneration and SCR failure control device |
| CN114592955A (en) * | 2022-03-17 | 2022-06-07 | 潍柴动力股份有限公司 | Method, device, system and storage medium for determining sulfur poisoning of SCR carrier |
| CN114592955B (en) * | 2022-03-17 | 2023-12-15 | 潍柴动力股份有限公司 | Method, device, system and storage medium for determining SCR carrier sulfur poisoning |
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