CN110714823B - DOC sulfur poisoning detection method and device and engine - Google Patents
DOC sulfur poisoning detection method and device and engine Download PDFInfo
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- CN110714823B CN110714823B CN201910907677.6A CN201910907677A CN110714823B CN 110714823 B CN110714823 B CN 110714823B CN 201910907677 A CN201910907677 A CN 201910907677A CN 110714823 B CN110714823 B CN 110714823B
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
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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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1612—SOx amount trapped in catalyst
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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
- Y02T10/40—Engine management systems
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention belongs toIn the technical field of vehicle aftertreatment, in particular to a DOC sulfur poisoning detection method, a detection device and an engine. The detection method comprises the following steps: judging whether the DOC temperature is in a calibration range; calculating a first detection time T1 when the DOC temperature is in a calibration range; calculating the total detection time T2 of the detection; calculating the ratio i of the first detection time T1 to the total detection time T21(ii) a Calculating the ratio i of the total detection time T2 of the detection to the total detection time T2 of the last detection; judging whether the engine is in a normal working condition or not; calculating the front back pressure of the DPF; and comparing the DPF front back pressure with the DPF front back pressure calculated in the last detection to judge whether the DOC is poisoned. According to the DOC sulfur poisoning detection method, DOC sulfur poisoning can be predicted in advance, vehicle aftertreatment blockage is prevented, and the use safety of a diesel engine is improved.
Description
Technical Field
The invention belongs to the technical field of vehicle aftertreatment, and particularly relates to a DOC sulfur poisoning detection method, a DOC sulfur poisoning detection device and an engine.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
Currently, due to emission legislation, it is desirable to add an aftertreatment system to a diesel engine system to convert diesel engine exhaust gas over a supported catalyst within the aftertreatment system. The oil on the existing market is uneven, the poor-quality oil easily causes DOC (Diesel Oxidation Catalyst) sulfur poisoning, when the DOC has serious sulfur poisoning, the Oxidation of the DOC to HC is weakened, and finally the DPF can not be actively regenerated, if the DOC sulfur poisoning is detected untimely, the aftertreatment blockage is easily caused, and the use safety of the Diesel engine is threatened.
Disclosure of Invention
The invention aims to at least solve the problem of untimely DOC sulfur poisoning detection. The purpose is realized by the following technical scheme:
the invention provides a DOC sulfur poisoning detection method in a first aspect, which comprises the following steps:
judging whether the DOC temperature is in a calibration range;
calculating first detection time T1 when the DOC temperature is in the calibration range according to the judgment result of whether the DOC temperature is in the calibration range;
calculating the total detection time T2 of the detection;
calculating the ratio i of the first detection time T1 to the total detection time T21Comparing the ratio i1And a first limit;
calculating the ratio i of the total detection time T2 of the detection to the total detection time T3 of the last detection2Comparing the ratio i2And a second limit;
according to the comparison ratio i1With a first limit value and comparing the ratio i2Judging whether the engine is in a normal working condition or not according to a comparison result with the second limit value;
calculating the front backpressure of the DPF according to the result of judging whether the engine is in the normal working condition;
and comparing the DPF front back pressure with the DPF front back pressure calculated in the last detection, and judging whether the DOC is poisoned according to the comparison result of the DPF front back pressure and the DPF front back pressure calculated in the last detection.
According to the DOC sulfur poisoning detection method, the DOC sulfur poisoning condition is indirectly judged through the passive regeneration effect of the DPF, and NO is oxidized into NO in a specific temperature interval of the DOC2Is strong in ability of (1), NO2Has strong oxidizing property, and can oxidize carbon particles accumulated in the DPF at a proper temperature as a main oxidizing agent for the passive regeneration of the DPF, thereby reducing the content of the carbon particles. When mild sulfur poisoning of DOC occurs, NO is oxidized to NO2Can become weaker and directly affect the passive regeneration action of the DPF, where the accumulated carbon particulates within the DPF can build up gradually, causing the DPF backpressure to rise. The invention explains that the passive regeneration effect should be better theoretically by judging the temperature occupancy ratio of the DPF in a specific temperature interval, after a period of time, the difference value or the ratio of the current DPF backpressure and the DPF backpressure detected last time is judged, when the difference value is smaller,the passive regeneration effect is considered to be good, the DOC oxidation capability is normal, and the DOC is in a normal working state. When the difference between the DOC and the diesel engine is large, the DOC is judged to have poor oxidation effect, the DOC is in a sulfur poisoning state and reports related faults, so that the sulfur poisoning condition of the DOC is indirectly judged through the passive regeneration effect of the DPF, the effect of predicting the sulfur poisoning of the DOC in advance can be achieved, the vehicle aftertreatment is prevented from being blocked, and the use safety of the diesel engine is improved.
In addition, the DOC sulfur poisoning detection method according to the present invention may further have the following additional technical features:
the DOC temperature is calibrated within the range of 300-450 ℃.
In some embodiments of the invention, the determining whether the DOC temperature is within the calibration range is based on determining whether the DOC upstream temperature is within the calibration range.
In some embodiments of the invention, the determining whether the DOC temperature is within the calibration range is based on determining whether the DOC downstream temperature is within the calibration range.
In some embodiments of the invention, the determining whether the DOC temperature is within the calibration range is based on determining whether an average temperature between the DOC upstream temperature and the DOC downstream temperature is within the calibration range.
In some embodiments of the invention, the first limit is 0.5 and the second limit is 1.
In some embodiments of the invention, the determination of whether the engine is in the normal operating condition is made according to the engine speed, the fuel injection amount per cycle and the torque load rate.
In some embodiments of the invention, the calculating DPF front backpressure is calculated from a DPF backpressure sensor.
In another aspect of the present invention, a DOC sulfur poisoning detection device for performing the DOC sulfur poisoning detection method according to any one of the above aspects is further provided, wherein the DOC and the DPF are sequentially disposed in the exhaust pipe, and a DPF backpressure sensor communicating with an internal passage of the exhaust pipe is disposed between the DOC and the DPF.
In another aspect of the present invention, an engine having the DOC sulfur poisoning detection device is further provided.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. Wherein:
FIG. 1 is a flow chart of a method for detecting DOC sulfur poisoning in an embodiment of the present application;
FIG. 2 is NO in DOC2A plot of conversion efficiency as a function of temperature;
fig. 3 is a schematic structural diagram of a detection device for implementing the DOC sulfur poisoning detection method in fig. 1 according to an embodiment of the present disclosure.
The reference numerals in the drawings denote the following:
10: an exhaust pipe;
20：DOC；
30：DPF；
40: DPF backpressure sensor.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Fig. 1 is a flowchart of a DOC sulfur poisoning detection method according to an embodiment of the present application. As shown in fig. 1, a first aspect of the present invention provides a DOC sulfur poisoning detection method, including the following steps:
judging whether the DOC temperature is in a calibration range;
calculating first detection time T1 when the DOC temperature is in the calibration range according to the judgment result of whether the DOC temperature is in the calibration range;
calculating the total detection time T2 of the detection;
calculating the ratio i of the first detection time T1 to the total detection time T21Comparing the ratio i1And a first limit;
calculating the ratio i of the total detection time T2 of the detection to the total detection time T3 of the last detection2Comparing the ratio i2And a second limit;
according to the comparison ratio i1With a first limit value and comparing the ratio i2Judging whether the engine is in a normal working condition or not according to a comparison result with the second limit value;
calculating the front backpressure of the DPF according to the result of judging whether the engine is in the normal working condition;
and comparing the DPF front back pressure with the DPF front back pressure calculated in the last detection, and judging whether the DOC is poisoned according to the comparison result of the DPF front back pressure and the DPF front back pressure calculated in the last detection.
According to the DOC sulfur poisoning detection method, the DOC sulfur poisoning condition is indirectly judged through the passive regeneration effect of the DPF, and NO is oxidized into NO in a specific temperature interval of the DOC2Is strong in ability of (1), NO2Has strong oxidizing property, and can oxidize carbon particles accumulated in the DPF at a proper temperature as a main oxidizing agent for the passive regeneration of the DPF, thereby reducing the content of the carbon particles. When mild sulfur poisoning of DOC occurs, NO is oxidized to NO2Can be weakened, directly affecting the passive regeneration action of the DPF, in which case the carbon particles accumulated in the DPF will gradually build up and increase, and thusCausing the DPF backpressure to rise. The invention explains that the passive regeneration effect should be better theoretically by judging the temperature occupancy ratio of the DPF in a specific temperature interval, and after a period of time, the difference value or the ratio of the current DPF backpressure and the DPF backpressure detected last time is judged, and when the difference value is smaller, the passive regeneration effect is considered to be better, the DOC oxidation capability is normal, and the DOC is in a normal working state. When the difference between the DOC and the diesel engine is large, the DOC is judged to have poor oxidation effect, the DOC is in a sulfur poisoning state and reports related faults, so that the sulfur poisoning condition of the DOC is indirectly judged through the passive regeneration effect of the DPF, the effect of predicting the sulfur poisoning of the DOC in advance can be achieved, the vehicle aftertreatment is prevented from being blocked, and the use safety of the diesel engine is improved.
Additionally, in some embodiments of the invention, the DOC temperature is calibrated to range from 300 ℃ to 450 ℃.
FIG. 2 is NO in DOC2Conversion efficiency plot as a function of temperature, shown in FIG. 2, NO in DOC2The conversion efficiency is highest at 300 ℃ to 450 ℃, so that carbon particles accumulated in the DPF can be oxidized to the maximum extent, the content of the carbon particles is reduced, and the detection precision is improved. And the DOC temperature calibration range can be adjusted up and down according to actual needs.
In some embodiments of the invention, determining whether the DOC temperature is within the calibration range is based on determining whether the DOC upstream temperature is within the calibration range.
In some embodiments of the invention, the determining whether the DOC temperature is within the calibration range is based on determining whether the DOC downstream temperature is within the calibration range.
In some embodiments of the invention, the determining whether the DOC temperature is within the calibration range is based on determining whether an average temperature between the DOC upstream temperature and the DOC downstream temperature is within the calibration range.
Wherein, DOC upstream temperature and DOC downstream temperature all can be measured by temperature sensor.
When the DOC temperature is in the calibration range, calculating a first detection time T1 when the DOC temperature is in the calibration range and the total detection of the detectionMeasuring the time T2, and calculating the ratio i of the first detection time T1 to the total detection time T21And calculating the ratio i of the total detection time T2 of the detection to the total detection time T3 of the last detection2。
In some embodiments of the invention, the first limit is 0.5 and the second limit is 1. When NO is present2The time in the efficient conversion period is more than half of the total detection time, and the total detection time is not less than the last total detection time. Wherein, the starting time of the total detection time is the ending time of the last total detection time, and the ending time of the total detection time is i1Up to 0.5, i2Time point 1 is reached.
In some embodiments of the invention, the determination of whether the engine is in a normal operating condition is made based on the engine speed, the fuel injection amount per cycle and the torque load rate. The engine is judged to be in a normal working condition through the rotating speed of the engine, the fuel injection quantity per cycle and the torque load rate, so that the detection accuracy is ensured.
In some embodiments of the invention, calculating the DPF front backpressure is calculated from a DPF backpressure sensor.
The method comprises the steps of calculating the DPF front backpressure through a DPF backpressure sensor, comparing the DPF front backpressure calculated at the position with the DPF front backpressure calculated in the last detection, judging DOC sulfur poisoning when the DPF front backpressure calculated at the position is larger than the DPF front backpressure calculated in the last detection, and judging that the DOC is in a normal state when the DPF front backpressure calculated at the position is smaller than or not different from the DPF front backpressure calculated in the last detection. When the current working condition is in the normal working condition, recording the DPF front backpressure calculated at this time, and taking the DPF front backpressure calculated at this time as a reference value of the DPF front backpressure in the next detection.
Since the DPF front backpressure depends on the carbon content in the DPF, if the deviation is large (the current DPF front backpressure is larger than the DPF front backpressure stored before), the carbon content in the detection process is proved to be increased, and the NO in the DOC is judged2The DOC is poisoned by sulfur.
Fig. 3 is a schematic structural diagram of a detection device for implementing the DOC sulfur poisoning detection method in fig. 1 according to an embodiment of the present disclosure. As shown in fig. 3, another aspect of the present invention further provides a DOC sulfur poisoning detection device for performing the DOC sulfur poisoning detection method in any one of the above embodiments, the detection device includes an exhaust pipe 10, a DOC20, and a DPF30, the DOC20 and the DPF30 are sequentially disposed in the exhaust pipe 10, and a DPF backpressure sensor 40 communicating with an internal passage of the exhaust pipe 10 is disposed between the DOC20 and the DPF 30.
The DPF backpressure sensor 40 can detect the DPF front backpressure, determine the change of carbon content in the DPF30 according to the change of the DPF front backpressure, and further determine NO in the DOC20 according to the change of the carbon content2The conversion rate of (1) indirectly judges the sulfur poisoning condition of the DOC20 through the passive regeneration effect of the DPF, thereby having the effect of predicting the sulfur poisoning condition of the DOC20 in advance, preventing the vehicle aftertreatment from being blocked and improving the use safety of the diesel engine.
Another aspect of the present invention also proposes an engine having the DOC sulfur poisoning detection device in the above embodiment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A DOC sulfur poisoning detection method is characterized by comprising the following steps:
judging whether the DOC temperature is in a calibration range;
calculating first detection time T1 when the DOC temperature is in the calibration range according to the judgment result of whether the DOC temperature is in the calibration range;
calculating the total detection time T2 of the detection;
calculating the ratio i of the first detection time T1 to the total detection time T21Comparing the ratio i1And a first limit;
calculating the ratio i of the total detection time T2 of the detection to the total detection time T3 of the last detection2Comparing the ratio i2And a second limit;
according to the comparison ratio i1With a first limit value and comparing the ratio i2As a result of comparison with the second limit value when i1Is greater than a first limit value and i2If the engine speed is larger than the second limit value, judging whether the engine is in a normal working condition;
calculating the front backpressure of the DPF according to the result of judging whether the engine is in the normal working condition;
and comparing the DPF front back pressure with the DPF front back pressure calculated in the last detection, and judging whether the DOC is poisoned according to the comparison result of the DPF front back pressure and the DPF front back pressure calculated in the last detection.
2. The method for detecting DOC sulfur poisoning of claim 1, wherein the DOC temperature is calibrated to range from 300 ℃ to 450 ℃.
3. The method for detecting sulfur poisoning of a DOC according to claim 1, wherein the determining whether the DOC temperature is within a calibration range is based on determining whether a DOC upstream temperature is within a calibration range.
4. The method for detecting sulfur poisoning of a DOC according to claim 1, wherein the determining whether the DOC temperature is within a calibration range is based on determining whether a temperature downstream of the DOC is within a calibration range.
5. The method for detecting sulfur poisoning of a DOC according to claim 1, wherein the determining whether the DOC temperature is within a calibration range is based on determining whether an average temperature between a DOC upstream temperature and a DOC downstream temperature is within a calibration range.
6. The method of claim 1, wherein the first limit is 0.5 and the second limit is 1.
7. The DOC sulfur poisoning detection method according to claim 1, wherein the judgment of whether the engine is in the normal working condition is carried out according to the engine speed, the fuel injection amount per cycle and the torque load rate.
8. The method for detecting DOC sulfur poisoning according to claim 1, wherein the calculating the DPF front backpressure is calculated based on a DPF backpressure sensor.
9. A DOC sulfur poisoning detection apparatus for performing the DOC sulfur poisoning detection method according to any one of claims 1 to 8, wherein the detection apparatus includes an exhaust pipe, a DOC and a DPF, the DOC and the DPF are sequentially provided in the exhaust pipe, and a DPF back pressure sensor communicating with an internal passage of the exhaust pipe is provided between the DOC and the DPF.
10. An engine characterized by having the DOC sulfur poisoning detection device according to claim 9.
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| CN113803141B (en) * | 2020-06-11 | 2022-09-09 | 北京福田康明斯发动机有限公司 | DOC sulfur poisoning detection method, storage medium and system |
| CN112539114B (en) * | 2020-12-01 | 2022-11-29 | 潍柴动力股份有限公司 | Method and device for treating sulfur poisoning of catalyst, electronic device and storage medium |
| CN115045741B (en) * | 2021-03-09 | 2023-07-25 | 北京福田康明斯发动机有限公司 | DOC sulfur poisoning diagnosis method, electronic device, vehicle, and storage medium |
| CN113803143B (en) * | 2021-09-02 | 2022-09-23 | 潍柴动力股份有限公司 | DOC sulfur poisoning judgment method and control device with same |
| CN114645761B (en) * | 2022-03-31 | 2023-03-21 | 潍柴动力股份有限公司 | DOC sulfur poisoning judgment method and vehicle |
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| JP2005240682A (en) * | 2004-02-26 | 2005-09-08 | Toyota Motor Corp | Exhaust emission control device for internal combustion engine |
| SE538378C2 (en) * | 2012-05-03 | 2016-06-07 | Scania Cv Ab | Method for detecting sulfur poisoning in an exhaust after-treatment system |
| CN104481655B (en) * | 2014-11-17 | 2017-06-27 | 潍柴动力股份有限公司 | The acquisition methods of carbon consumption, controller and engine in particulate matter trap |
| JP6183401B2 (en) * | 2015-04-02 | 2017-08-23 | トヨタ自動車株式会社 | Catalyst regeneration treatment equipment |
| JP6602557B2 (en) * | 2015-05-29 | 2019-11-06 | 三菱重工エンジン＆ターボチャージャ株式会社 | Exhaust gas treatment device regeneration control device |
| JP6500886B2 (en) * | 2016-12-22 | 2019-04-17 | トヨタ自動車株式会社 | Exhaust purification system for internal combustion engine |
| JP6660334B2 (en) * | 2017-03-22 | 2020-03-11 | 日立オートモティブシステムズ株式会社 | Control device and control method for internal combustion engine |
| CN109252928B (en) * | 2018-09-27 | 2020-03-06 | 潍柴动力股份有限公司 | Diesel engine exhaust pipeline fault detection method and device |
| CN109578123B (en) * | 2018-11-27 | 2020-06-26 | 潍柴动力股份有限公司 | Failure judgment method and device for diesel oxidation catalyst |
| CN109707494B (en) * | 2018-12-28 | 2020-04-24 | 潍柴动力股份有限公司 | Treatment method and device for post-treatment of sulfur poisoning |
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