CN109707494B - Treatment method and device for post-treatment of sulfur poisoning - Google Patents
Treatment method and device for post-treatment of sulfur poisoning Download PDFInfo
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- CN109707494B CN109707494B CN201811619283.2A CN201811619283A CN109707494B CN 109707494 B CN109707494 B CN 109707494B CN 201811619283 A CN201811619283 A CN 201811619283A CN 109707494 B CN109707494 B CN 109707494B
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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
Abstract
The application provides a treatment method and a device for post-treating sulfur poisoning, wherein the method comprises the steps of firstly obtaining the driving mileage of a vehicle during driving; if the driving mileage is larger than a preset mileage, obtaining the conversion efficiency of a selective catalytic reduction device (SCR) in the aftertreatment system in a preset temperature interval; then determining the difference value of the conversion efficiency and the prestored initial conversion efficiency as deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts; then determining the relation between the degradation efficiency and a preset limit value; and if the deterioration efficiency exceeds the preset limit value, controlling an oxidation catalyst DOC in the aftertreatment system to execute detoxification operation. The embodiment of the application adopts a mode that the conversion efficiency is obtained in the SCR preset temperature interval to detect the post-treatment sulfur poisoning, so that the real-time performance and the accuracy of the detection are greatly improved.
Description
Technical Field
The application relates to the field of diesel engines, in particular to a method and a device for treating sulfur poisoning after aftertreatment.
Background
With the increasing severity of environmental pollution, diesel engines require the use of aftertreatment systems to aftertreatment exhaust gases to meet emission requirements.
In the prior art, an after-treatment system of an Oxidation catalyst doc (diesel Oxidation catalyst), a diesel particulate filter dpf (diesel particulate filter), and a selective catalytic reduction device scr (selective catalytic reduction) is usually adopted, so that if a diesel engine uses inferior fuel, especially fuel with over-standard sulfur content, sulfur poisoning of an after-treatment catalyst can be caused, and vehicle torque limitation can be caused.
Currently, sulfur poisoning is detected based on deterioration of DOC light-off characteristics, and detoxification is through DPF regeneration mode. However, the method cannot find the sulfur poisoning problem of the post-treatment in time, and wastes fuel.
Disclosure of Invention
In view of the above, the present application provides a method and an apparatus for treating post-treatment sulfur poisoning, which aims to improve the accuracy of detecting post-treatment sulfur poisoning and detoxify with higher efficiency.
In order to achieve the above object, the present application provides the following technical solutions:
a method of post-treating sulfur poisoning comprising:
obtaining the driving mileage of the vehicle;
if the driving mileage is larger than a preset mileage, obtaining the conversion efficiency of a selective catalytic reduction device (SCR) in the aftertreatment system in a preset temperature interval;
determining a difference value between the conversion efficiency and a pre-stored initial conversion efficiency as a deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts;
determining the relation between the degradation efficiency and a preset limit value;
and if the deterioration efficiency exceeds the preset limit value, controlling an oxidation catalyst DOC in the aftertreatment system to execute detoxification operation.
Optionally, the obtaining the conversion efficiency of the selective catalytic reduction device SCR in the aftertreatment system at the preset temperature interval includes:
acquiring an inlet temperature value acquired by a temperature sensor at the SCR inlet;
if the inlet temperature value is in a preset inlet temperature interval, obtaining a first NOx numerical value of the SCR inlet and a second NOx numerical value of the SCR outlet;
and calculating the conversion efficiency of the SCR low-temperature region according to the first NOx numerical value and the second NOx numerical value.
Optionally, the performing detoxification operation comprises:
the temperature of the diesel particulate filter DPF is controlled to be within a preset detoxification temperature range, and the time duration is controlled to be within a preset detoxification time duration.
Optionally, the detoxification operation further comprises:
obtaining the conversion efficiency after detoxification operation;
determining a difference between the post-detoxification conversion efficiency and the initial conversion efficiency as a relationship between a post-detoxification deterioration efficiency and the preset limit value;
if the deterioration efficiency after detoxification is greater than the preset limit value, sending out a reminding message of the fault of the post-processing system;
and if the deterioration efficiency after detoxification is not greater than the preset limit value, returning to and executing the step of obtaining the driving mileage of the vehicle.
Optionally, the obtaining the driving mileage of the vehicle at this time includes:
and obtaining the driving mileage of the vehicle during parking.
Optionally, the obtaining the driving mileage of the vehicle at this time includes:
when the vehicle runs, the running mileage of the vehicle running at this time is obtained in real time;
and expanding a preset value on the basis of the preset temperature interval to serve as a new preset temperature interval.
In another aspect of the present invention, there is provided a post-treatment sulfur poisoning treatment apparatus comprising:
the mileage acquisition module is used for acquiring the driving mileage of the vehicle;
the conversion efficiency obtaining module is used for obtaining the conversion efficiency of a selective catalytic reduction device SCR in the aftertreatment system in a preset temperature interval if the driving mileage is larger than a preset mileage;
a deterioration efficiency determination module for determining a difference between the conversion efficiency and a pre-stored initial conversion efficiency as a deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts;
the relation judgment module is used for determining the relation between the degradation efficiency and a preset limit value;
and the execution module is used for controlling an oxidation type catalyst DOC in the aftertreatment system to execute detoxification operation if the degradation efficiency exceeds the preset limit value.
Optionally, the conversion efficiency obtaining module includes:
the first obtaining unit is used for obtaining an inlet temperature value collected by a temperature sensor at the SCR inlet;
a second obtaining unit, configured to obtain a first NOx value at the SCR inlet and a second NOx value at the SCR outlet if the inlet temperature value is within a preset inlet temperature interval;
and the calculating unit is used for calculating the conversion efficiency of the SCR low-temperature region according to the first NOx numerical value and the second NOx numerical value.
Optionally, the performing detoxification operation comprises:
the temperature of the diesel particulate filter DPF is controlled to be within a preset detoxification temperature range, and the time duration is controlled to be within a preset detoxification time duration.
Optionally, the method further includes:
a post-detoxification transformation efficiency obtaining module for obtaining a post-detoxification transformation efficiency after a detoxification operation;
a post-detoxification relation determination module configured to determine a difference between the post-detoxification conversion efficiency and the initial conversion efficiency as a relation between a post-detoxification degradation efficiency and the preset limit value;
the reminding module is used for sending out reminding information of the fault of the post-processing system if the conversion efficiency after detoxification is greater than the preset limit value;
and the returning module is used for returning and executing the step of obtaining the driving mileage of the vehicle at the time if the detoxified conversion efficiency is smaller than the preset limit value.
The application provides a treatment method and a device for post-treating sulfur poisoning, wherein the method comprises the steps of firstly obtaining the driving mileage of a vehicle during driving; if the driving mileage is larger than a preset mileage, obtaining the conversion efficiency of a selective catalytic reduction device (SCR) in the aftertreatment system in a preset temperature interval; then determining the difference value of the conversion efficiency and the prestored initial conversion efficiency as deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts; then determining the relation between the degradation efficiency and a preset limit value; and if the deterioration efficiency exceeds the preset limit value, controlling an oxidation catalyst DOC in the aftertreatment system to execute detoxification operation. The embodiment of the application adopts a mode that the conversion efficiency is obtained in the SCR preset temperature interval to detect the post-treatment sulfur poisoning, so that the real-time performance and the accuracy of the detection are greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a process for post-treating sulfur poisoning according to the present disclosure;
FIG. 2 is another schematic flow diagram of a method of post-treating sulfur poisoning in an embodiment of the present disclosure;
FIG. 3 is a schematic view showing the structure of a treating apparatus for post-treating sulfur poisoning in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an efficiency obtaining module in a processing device for post-processing sulfur poisoning according to an embodiment of the present invention.
Detailed Description
The control method of the cooling liquid of the motor cooling system provided by the embodiment of the application can be applied to vehicles, particularly to a controller of an aftertreatment system, and is used for improving the detection accuracy and the real-time performance of sulfur poisoning.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the invention discloses a treatment method for post-treatment of sulfur poisoning.
Referring to fig. 1, fig. 1 is a schematic flow chart of a treatment method for post-treating sulfur poisoning according to the present disclosure.
The invention provides a treatment method for post-treatment of sulfur poisoning, which comprises the following steps:
s101, acquiring the driving mileage of the vehicle during the driving;
in the embodiment of the invention, the driving mileage of the driving is obtained when the post-treatment sulfur poisoning is treated. The driving mileage of the vehicle refers to the mileage of the vehicle from the start to the current driving.
In the embodiment of the application, two ways of obtaining the driving mileage are provided, wherein one way is under a parking condition, and the other way is in the driving process. Wherein the result under parking conditions is more accurate. The difference is that in the driving process, the preset temperature interval needs to be expanded, and the expanded preset temperature interval is used as a judgment basis for the subsequent steps.
S102, if the driving mileage is larger than a preset mileage, obtaining the conversion efficiency of a selective catalytic reduction device (SCR) in the aftertreatment system in a preset temperature interval;
in the embodiment of the present invention, the preset mileage may be every 100km, and the process of obtaining the conversion efficiency is performed every 100km of the vehicle.
Wherein, the preset temperature interval refers to a low-temperature degradation zone of the SCR, and can be 200-250 ℃. And acquiring the SCR conversion efficiency in the preset temperature interval.
Specifically, the obtaining of the conversion efficiency of the selective catalytic reduction device SCR in the aftertreatment system in the preset temperature interval includes:
acquiring an inlet temperature value acquired by a temperature sensor at the SCR inlet;
if the inlet temperature value is in a preset inlet temperature interval, obtaining a first NOx numerical value of the SCR inlet and a second NOx numerical value of the SCR outlet;
and calculating the conversion efficiency of the SCR low-temperature region according to the first NOx numerical value and the second NOx numerical value.
In the embodiment of the invention, an inlet temperature value acquired by a temperature sensor arranged at an SCR inlet is obtained, and if the inlet temperature value is within a preset inlet temperature interval, for example, 240 ℃ to 260 ℃, a process of calculating conversion efficiency is executed.
Wherein a first NOx value obtained at the SCR inlet, i.e. a first NOx sensor upstream, and a second NOx value obtained at the SCR outlet, i.e. a second NOx sensor downstream, are obtained. According to the formula:
conversion efficiency (first NOx value-second NOx value)/first NOx value
And calculating to obtain the conversion efficiency.
S103, determining a difference value between the conversion efficiency and a pre-stored initial conversion efficiency as a deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts;
in the examples of the present invention, the conversion efficiency was obtained, and then the difference from the initial conversion efficiency was determined as the deterioration efficiency. Wherein the initial conversion efficiency is a conversion efficiency obtained when the vehicle is just started, and the obtaining mode can refer to the calculation process. The deterioration efficiency is a value obtained by subtracting the current conversion efficiency from the initial conversion efficiency.
S104, determining the relation between the degradation efficiency and a preset limit value;
the relationship with the preset limit value is then determined. The preset limit value is the basis for triggering whether to execute the detoxification operation. If it is exceeded, the detoxification operation should be performed, and if not, it need not be performed.
And S105, if the deterioration efficiency exceeds the preset limit value, controlling an oxidation type catalyst DOC in the aftertreatment system to execute detoxification operation.
And if the exceeding value is determined to exceed the preset limit value, which indicates that the detoxification operation needs to be executed, controlling the oxidation catalyst DOC to execute the detoxification operation.
Wherein the performing detoxification operations comprises:
and controlling the DOC to spray fuel oil, so that the front temperature of the DPF is in a preset detoxification temperature interval, and the duration is in a preset detoxification duration.
In the embodiment of the invention, the detoxification temperature interval can be 600 ℃ to 650 ℃. The time period is 10 to 30 minutes. In the temperature interval and time, the detoxification efficiency and effect are better, sufficient detoxification can be ensured, fuel oil is saved, and the effect is poor at other temperatures and time.
The application provides a treatment method and a device for post-treating sulfur poisoning, wherein the method comprises the steps of firstly obtaining the driving mileage of a vehicle during driving; if the driving mileage is larger than a preset mileage, obtaining the conversion efficiency of a selective catalytic reduction device (SCR) in the aftertreatment system in a preset temperature interval; then determining the difference value of the conversion efficiency and the prestored initial conversion efficiency as deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts; then determining the relation between the degradation efficiency and a preset limit value; and if the deterioration efficiency exceeds the preset limit value, controlling an oxidation catalyst DOC in the aftertreatment system to execute detoxification operation. The embodiment of the application adopts a mode that the conversion efficiency is obtained in the SCR preset temperature interval to detect the post-treatment sulfur poisoning, so that the real-time performance and the accuracy of the detection are greatly improved.
FIG. 2 is another schematic flow diagram of a post-sulfur poisoning treatment process disclosed herein.
On the basis of the above embodiment, the detoxification operation further comprises:
s201, obtaining the conversion efficiency after detoxification operation;
s202, determining a difference value between the detoxified conversion efficiency and the initial conversion efficiency as a relation between the detoxified deterioration efficiency and the preset limit value;
s203, if the deterioration efficiency after detoxification is greater than the preset limit value, sending out a reminding message of the fault of the post-processing system;
and S204, if the deterioration efficiency after detoxification is not greater than the preset limit value, returning to and executing the step of obtaining the driving mileage of the vehicle.
In the embodiment of the invention, after the detoxification operation is performed, the conversion efficiency after detoxification is continuously detected.
Obtaining the conversion efficiency after detoxification operation; the detoxified deterioration efficiency obtained by subtracting the detoxified conversion efficiency from the initial conversion efficiency is then compared with a preset limit value.
If the deterioration efficiency after detoxification is greater than the preset limit value, it is proved that the reduction of the SCR efficiency may not be caused by sulfur poisoning, and therefore, a user needs to be reminded to check whether the aftertreatment system has other faults or not and send out a reminding message.
If detoxification is successful, the efficiency of deterioration after detoxification is less than or equal to the preset limit value, and the process returns to step S101 to execute the next process.
Therefore, in the embodiment of the invention, the reliability of post-treatment sulfur poisoning is ensured, and machine failure caused by poor diesel is avoided. The economic loss of the user is avoided, and the vehicle attendance rate is ensured.
Corresponding to the method embodiment, the embodiment of the invention also discloses a treatment device for post-treating sulfur poisoning.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a processing device for post-processing sulfur poisoning according to an embodiment of the present invention.
The invention discloses a treatment device for post-treating sulfur poisoning, which comprises:
the mileage acquisition module 1 is used for acquiring the driving mileage of the vehicle;
in the embodiment of the invention, the driving mileage of the driving is obtained when the post-treatment sulfur poisoning is treated. The driving mileage of the vehicle refers to the mileage of the vehicle from the start to the current driving.
In the embodiment of the application, two ways of obtaining the driving mileage are provided, wherein one way is under a parking condition, and the other way is in the driving process. Wherein the result under parking conditions is more accurate. The difference is that in the driving process, the preset temperature interval needs to be expanded, and the expanded preset temperature interval is used as a judgment basis for the subsequent steps.
The conversion efficiency obtaining module 2 is used for obtaining the conversion efficiency of a selective catalytic reduction device SCR in the aftertreatment system in a preset temperature interval if the driving mileage is greater than a preset mileage;
in the embodiment of the present invention, the preset mileage may be every 100km, and the process of obtaining the conversion efficiency is performed every 100km of the vehicle.
Wherein, the preset temperature interval refers to a low-temperature degradation zone of the SCR, and can be 200-250 ℃. And acquiring the SCR conversion efficiency in the preset temperature interval.
Specifically, the obtaining of the conversion efficiency of the selective catalytic reduction device SCR in the aftertreatment system in the preset temperature interval includes:
acquiring an inlet temperature value acquired by a temperature sensor at the SCR inlet;
if the inlet temperature value is in a preset inlet temperature interval, obtaining a first NOx numerical value of the SCR inlet and a second NOx numerical value of the SCR outlet;
and calculating the conversion efficiency of the SCR low-temperature region according to the first NOx numerical value and the second NOx numerical value.
In the embodiment of the invention, an inlet temperature value acquired by a temperature sensor arranged at an SCR inlet is obtained, and if the inlet temperature value is within a preset inlet temperature interval, for example, 240 ℃ to 260 ℃, a process of calculating conversion efficiency is executed.
Wherein a first NOx value obtained at the SCR inlet, i.e. a first NOx sensor upstream, and a second NOx value obtained at the SCR outlet, i.e. a second NOx sensor downstream, are obtained. According to the formula:
conversion efficiency (first NOx value-second NOx value)/first NOx value
And calculating to obtain the conversion efficiency.
A deterioration efficiency determination module 3 for determining a difference between the conversion efficiency and a pre-stored initial conversion efficiency as a deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts;
in the examples of the present invention, the conversion efficiency was obtained, and then the difference from the initial conversion efficiency was determined as the deterioration efficiency. Wherein the initial conversion efficiency is a conversion efficiency obtained when the vehicle is just started, and the obtaining mode can refer to the calculation process. The deterioration efficiency is a value obtained by subtracting the current conversion efficiency from the initial conversion efficiency.
A relation judgment module 4, configured to determine a relation between the degradation efficiency and a preset limit value;
the relationship with the preset limit value is then determined. The preset limit value is the basis for triggering whether to execute the detoxification operation. If it is exceeded, the detoxification operation should be performed, and if not, it need not be performed.
And the execution module 5 is used for controlling an oxidation type catalyst DOC in the aftertreatment system to execute detoxification operation if the degradation efficiency exceeds the preset limit value.
And if the exceeding value is determined to exceed the preset limit value, which indicates that the detoxification operation needs to be executed, controlling the DOC detoxification operation of the oxidation type catalyst.
Wherein the performing detoxification operations comprises:
and controlling the DOC to spray fuel oil, so that the front temperature of the DPF is in a preset detoxification temperature interval, and the duration is in a preset detoxification duration.
In the embodiment of the invention, the detoxification temperature interval can be 600 ℃ to 650 ℃. The time period is 10 to 30 minutes. In the temperature interval and time, the detoxification efficiency and effect are better, sufficient detoxification can be ensured, fuel oil is saved, and the effect is poor at other temperatures and time.
Optionally, the conversion efficiency obtaining module includes:
a first obtaining unit 11, configured to obtain an inlet temperature value acquired by a temperature sensor at the SCR inlet;
a second obtaining unit 22, configured to obtain a first NOx value at the SCR inlet and a second NOx value at the SCR outlet if the inlet temperature value is within a preset inlet temperature interval;
a calculating unit 33, configured to calculate a conversion efficiency of the SCR low temperature region according to the first NOx value and the second NOx value.
Optionally, the performing detoxification operation comprises:
the temperature before DPF is controlled to be within a preset detoxification temperature range, and the time duration is controlled to be within a preset detoxification time duration.
Optionally, the method further includes:
a post-detoxification transformation efficiency obtaining module for obtaining a post-detoxification transformation efficiency after a detoxification operation;
a post-detoxification relation determination module configured to determine a difference between the post-detoxification conversion efficiency and the initial conversion efficiency as a relation between a post-detoxification degradation efficiency and the preset limit value;
the reminding module is used for sending out reminding information of the fault of the post-processing system if the conversion efficiency after detoxification is greater than the preset limit value;
and the returning module is used for returning and executing the step of obtaining the driving mileage of the vehicle at the time if the detoxified conversion efficiency is smaller than the preset limit value.
It can be understood that each module in the processing apparatus for post-treating sulfur poisoning disclosed in the present invention may implement each step of the processing method for post-treating sulfur poisoning in the above method embodiments, and details are not described herein.
The application provides a processing device for post-processing sulfur poisoning, which firstly obtains the driving mileage of the vehicle; if the driving mileage is larger than a preset mileage, obtaining the conversion efficiency of a selective catalytic reduction device (SCR) in the aftertreatment system in a preset temperature interval; then determining the difference value of the conversion efficiency and the prestored initial conversion efficiency as deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts; then determining the relation between the degradation efficiency and a preset limit value; and if the deterioration efficiency exceeds the preset limit value, controlling an oxidation catalyst DOC in the aftertreatment system to execute detoxification operation. The embodiment of the application adopts a mode that the conversion efficiency is obtained in the SCR preset temperature interval to detect the post-treatment sulfur poisoning, so that the real-time performance and the accuracy of the detection are greatly improved.
The functions described in the method of the embodiment of the present application, if implemented in the form of software functional units and sold or used as independent products, may be stored in a storage medium readable by a computing device. Based on such understanding, part of the contribution to the prior art of the embodiments of the present application or part of the technical solution may be embodied in the form of a software product stored in a storage medium and including several instructions for causing a computing device (which may be a personal computer, a server, a mobile computing device or a network device) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of post-treating sulfur poisoning, comprising:
obtaining the driving mileage of the vehicle;
if the driving mileage is larger than a preset mileage, obtaining the conversion efficiency of a selective catalytic reduction device (SCR) in the aftertreatment system in a preset temperature interval;
determining a difference value between the conversion efficiency and a pre-stored initial conversion efficiency as a deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts;
determining the relation between the degradation efficiency and a preset limit value;
and if the deterioration efficiency exceeds the preset limit value, controlling an oxidation catalyst DOC in the aftertreatment system to execute detoxification operation.
2. The process of claim 1, wherein said obtaining a conversion efficiency of a selective catalytic reduction device (SCR) in an aftertreatment system at a predetermined temperature interval comprises:
acquiring an inlet temperature value acquired by a temperature sensor at the SCR inlet;
if the inlet temperature value is in a preset inlet temperature interval, obtaining a first NOx numerical value of the SCR inlet and a second NOx numerical value of the SCR outlet;
and calculating the conversion efficiency of the SCR in a preset temperature interval according to the first NOx numerical value and the second NOx numerical value.
3. The process of claim 1, wherein said performing a detoxification operation comprises:
the temperature of the diesel particulate filter DPF is controlled to be within a preset detoxification temperature range, and the time duration is controlled to be within a preset detoxification time duration.
4. The process of claim 3, further comprising, after performing the detoxification operation:
obtaining the conversion efficiency after detoxification operation;
determining a difference between the post-detoxification conversion efficiency and the initial conversion efficiency as a relationship between a post-detoxification deterioration efficiency and the preset limit value;
if the deterioration efficiency after detoxification is greater than the preset limit value, sending out a reminding message of the fault of the post-processing system;
and if the deterioration efficiency after detoxification is not greater than the preset limit value, returning to and executing the step of obtaining the driving mileage of the vehicle.
5. The processing method according to any one of claims 1 to 4, wherein the obtaining of the mileage of the vehicle at the time includes:
and obtaining the driving mileage of the vehicle during parking.
6. The processing method according to any one of claims 1 to 4, wherein the obtaining of the mileage of the vehicle at the time includes:
when the vehicle runs, the running mileage of the vehicle running at this time is obtained in real time;
and expanding a preset value on the basis of the preset temperature interval to serve as a new preset temperature interval.
7. A process device for post-treating sulfur poisoning, comprising:
the mileage acquisition module is used for acquiring the driving mileage of the vehicle;
the conversion efficiency obtaining module is used for obtaining the conversion efficiency of a selective catalytic reduction device SCR in the aftertreatment system in a preset temperature interval if the driving mileage is larger than a preset mileage;
a deterioration efficiency determination module for determining a difference between the conversion efficiency and a pre-stored initial conversion efficiency as a deterioration efficiency; wherein the initial conversion efficiency is the conversion efficiency of the SCR in a preset temperature interval obtained when a vehicle starts;
the relation judgment module is used for determining the relation between the degradation efficiency and a preset limit value;
and the execution module is used for controlling an oxidation type catalyst DOC in the aftertreatment system to execute detoxification operation if the degradation efficiency exceeds the preset limit value.
8. The processing apparatus according to claim 7, wherein the conversion efficiency obtaining module includes:
the first obtaining unit is used for obtaining an inlet temperature value collected by a temperature sensor at the SCR inlet;
a second obtaining unit, configured to obtain a first NOx value at the SCR inlet and a second NOx value at the SCR outlet if the inlet temperature value is within a preset inlet temperature interval;
and the calculating unit is used for calculating the conversion efficiency of the SCR in a preset temperature interval according to the first NOx numerical value and the second NOx numerical value.
9. The processing device as recited in claim 7, wherein the performing a detoxification operation comprises:
the temperature of the diesel particulate filter DPF is controlled to be within a preset detoxification temperature range, and the time duration is controlled to be within a preset detoxification time duration.
10. The processing apparatus as in claim 9, further comprising:
a post-detoxification transformation efficiency obtaining module for obtaining a post-detoxification transformation efficiency after a detoxification operation;
a post-detoxification relation determination module configured to determine a difference between the post-detoxification conversion efficiency and the initial conversion efficiency as a relation between a post-detoxification degradation efficiency and the preset limit value;
the reminding module is used for sending out reminding information of the fault of the post-processing system if the conversion efficiency after detoxification is greater than the preset limit value;
and the returning module is used for returning and executing the step of obtaining the driving mileage of the vehicle at the time if the detoxified conversion efficiency is smaller than the preset limit value.
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| BR112021024671A2 (en) * | 2019-06-10 | 2022-02-08 | Cummins Emission Solutions Inc | Fuel analysis systems and methods |
| CN110714823B (en) * | 2019-09-24 | 2020-11-20 | 潍柴动力股份有限公司 | DOC sulfur poisoning detection method and device and engine |
| CN110761882B (en) * | 2019-12-26 | 2020-04-07 | 潍柴动力股份有限公司 | Method and system for judging SCR sulfur poisoning |
| CN111502805B (en) * | 2020-03-26 | 2021-05-18 | 潍柴动力股份有限公司 | Control method and control device for active regeneration of DPF of vehicle |
| CN112523848A (en) * | 2020-10-29 | 2021-03-19 | 广西玉柴机器股份有限公司 | Method for treating sulfur content in fuel oil and related device |
| CN112664302B (en) * | 2020-12-24 | 2022-04-05 | 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 |
| CN112832889B (en) * | 2021-01-08 | 2022-05-13 | 广西玉柴机器股份有限公司 | Method for diagnosing high-sulfur diesel used by engine and related device |
| CN113047924B (en) * | 2021-03-04 | 2022-07-15 | 广西玉柴机器股份有限公司 | Treatment method and system for diesel engine catalyst |
| 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 |
| CN113669143B (en) * | 2021-09-24 | 2022-12-06 | 一汽解放汽车有限公司 | Performance detection method, detection device and medium for tail gas aftertreatment system |
| CN113719338B (en) * | 2021-09-27 | 2023-01-24 | 潍柴动力股份有限公司 | SCR sulfur poisoning degree determining method and device, diesel vehicle and medium |
| CN113864048B (en) * | 2021-09-28 | 2024-04-02 | 昆山三一动力有限公司 | High sulfur oil identification processing method, device, vehicle and computer readable storage medium |
| 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 |
| CN115653735B (en) * | 2022-12-27 | 2023-04-07 | 卓品智能科技无锡股份有限公司 | Method and system for recovering diesel engine SCR sulfur poisoning |
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| SE538378C2 (en) * | 2012-05-03 | 2016-06-07 | Scania Cv Ab | Method for detecting sulfur poisoning in an exhaust after-treatment system |
| JP2013245606A (en) * | 2012-05-25 | 2013-12-09 | Isuzu Motors Ltd | Exhaust gas purification system |
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