CN110608082A - Instrument and method for detecting and cleaning ash blockage of diesel engine particle filter pore channel - Google Patents
Instrument and method for detecting and cleaning ash blockage of diesel engine particle filter pore channel Download PDFInfo
- Publication number
- CN110608082A CN110608082A CN201911016283.8A CN201911016283A CN110608082A CN 110608082 A CN110608082 A CN 110608082A CN 201911016283 A CN201911016283 A CN 201911016283A CN 110608082 A CN110608082 A CN 110608082A
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- China
- Prior art keywords
- probe
- particulate filter
- dpf
- pore
- guide sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011148 porous material Substances 0.000 title claims abstract description 71
- 238000004140 cleaning Methods 0.000 title claims abstract description 27
- 239000002245 particle Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 21
- 239000000523 sample Substances 0.000 claims abstract description 147
- 238000001514 detection method Methods 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
- F02B2077/045—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines by flushing or rinsing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention discloses a diesel engine particle filter pore ash blockage detecting and cleaning instrument which comprises a support, a probe guide sleeve and a probe, wherein a probe through hole is formed in the support, the probe guide sleeve is fixed on the support, the probe through hole is aligned with the probe guide sleeve, the probe is sleeved in the probe guide sleeve and can slide up and down in the probe guide sleeve, the front end of the probe penetrates through the probe through hole, the outer side wall of the probe is matched with a DPF pore of an engine particle filter, an air passage is formed in the probe, an air outlet hole communicated with the air passage is formed in the needle head end of the probe, an air inlet communicated with the air passage is formed in the needle tail of the probe, and the air inlet is used for being communicated with an air source. The invention can accurately determine the position of the plug relative to the pore channel and remove the plug.
Description
Technical Field
The invention relates to the field of automobile detection instruments, in particular to an instrument and a method for detecting and cleaning ash blockage of a diesel engine particle filter pore channel.
Background
A Diesel engine exhaust Particulate Filter (DPF) is the most effective device for trapping and purifying exhaust Particulate matters in an exhaust aftertreatment system of a Diesel vehicle at present and is also a necessary device for meeting new emission regulations of the Diesel vehicle.
However, as the service time increases, the actual regeneration effect is not ideal, and ash which cannot be removed by regeneration is accumulated continuously, so that the pore channel of the DPF is blocked, the effective volume of the DPF is reduced, the exhaust performance is deteriorated, the power of an engine is insufficient, and even the engine and an aftertreatment system are damaged. Aftermarket services therefore require detection and corresponding cleaning of a clogged DPF.
The DPF blockage detection method in the market at present is measured by a pressure drop value of the airflow backpressure of an inlet and an outlet of the DPF, and the method has the defects that: the backpressure data cannot accurately position which pore channel is blocked, and the position depth of the pore channel where the blockage is located cannot be determined; limited by low detection precision of the instrument: even if the pressure drop data for the backpressure is acceptable, there may be several DPF orifice plugging events.
The method for cleaning the DPF blockage in the aftermarket at present comprises the following steps: if the channel blockage is found, the specific channel blockage cannot be accurately positioned, the cleaning means is to perform blowing cleaning on the whole channels, and the method has the following defects: the compressed air airflow of blowing cleaning can cause certain damage to the inner walls of all pore channels, and the service life of the DPF is shortened.
Disclosure of Invention
The invention aims to provide a diesel engine particle filter pore ash blockage detecting and cleaning instrument and a method.
In order to achieve the purpose, the invention designs a diesel engine particle filter pore ash blockage detecting and cleaning instrument, which is characterized in that: the probe comprises a support, a probe guide sleeve and a probe, wherein a probe through hole is formed in the support, the probe guide sleeve is fixed on the support, the probe through hole is aligned with the probe guide sleeve, the probe is sleeved in the probe guide sleeve and can slide up and down in the probe guide sleeve, the front end of the probe penetrates through the probe through hole, the outer side wall of the probe is matched with a DPF pore passage of an engine particle filter, an air passage is formed in the probe, an air outlet hole communicated with the air passage is formed in the needle head end of the probe, an air inlet hole communicated with the air passage is formed in the needle tail of the probe, and the air inlet hole is used.
A method for detecting and cleaning ash blockage of a diesel engine particle filter pore channel by using the instrument comprises the following steps:
step 1: inserting a probe into a pore channel of a DPF of an engine particulate filter to be detected:
step 2: manually pushing the probe to enable the probe to extend into a DPF pore passage of the engine particulate filter to be detected, and if the probe does not feel blocking in the process of extending, indicating that the DPF pore passage of the engine particulate filter to be detected is not blocked;
if the probe is blocked in the process of extending into the DPF, indicating that the DPF pore path of the engine particulate filter to be detected is blocked, recording the reading of the scale of the probe at the moment, and determining the specific blocking position in the DPF pore path of the engine particulate filter to be detected;
and step 3: and after the blockage of the DPF pore channel of the engine particle filter to be detected is determined, opening an air source, and blowing away the blockage through the air outlet of the probe.
The invention has the advantages that:
the method can quickly judge whether the DPF pore passage of the engine particle filter is blocked and accurately determine the position where the blockage occurs, in addition, the method only cleans the DPF pore passage of the engine particle filter with the blockage through compressed air, compared with the mode of cleaning all the DPF pore passages of the engine particle filter by the traditional method, the method uses the compressed air sprayed by the probe to clean the pore passages in situ immediately after positioning the blocked pore passages, and has no any action on the unblocked pore passages, so that the damage to the DPF pore passages is reduced, and the service life of the DPF pore passages is prolonged.
Drawings
FIG. 1 is a schematic view of a plan view of a diesel particulate filter cell;
FIG. 2 is a schematic structural view of cells of a diesel particulate filter;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is a schematic bottom view of the present invention;
FIG. 6 is a schematic cross-sectional view of the present invention;
FIG. 7 is a schematic diagram of a plurality of probes according to the present invention.
Wherein, 1-support, 1.1-probe through-hole, 2-probe guide sleeve, 3-probe, 3.1-air flue, 3.2-venthole, 3.3-inlet port, 4-engine particle filter DPF pore, 5-scale, 6-spacing protruding.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the diesel particulate filter pore ash blockage detection and cleaning instrument comprises a support 1, a probe guide sleeve 2 and a probe 3, wherein a probe through hole 1.1 is formed in the support 1, the probe guide sleeve 2 is fixed on the support 1, the probe through hole 1.1 is aligned with the probe guide sleeve 2, the probe 3 is sleeved in the probe guide sleeve 2 and can slide up and down in the probe guide sleeve 2, the front end of the probe 3 penetrates through the probe through hole 1.1, the outer side wall of the probe 3 is matched with a DPF pore 4 of an engine particulate filter, an air passage 3.1 is formed in the probe 3, an air outlet 3.2 communicated with the air passage 3.1 is formed in the needle head end of the probe 3, an air inlet 3.3 communicated with the air passage 3.1 is formed in the needle tail of the probe 3, and the air inlet 3.3 is used for communicating with an air source.
Among the above-mentioned technical scheme, be equipped with scale 5 on the probe 3, the pointed end of probe 3 sets up to the full scale position of scale 5, and the side of the afterbody of probe 3 sets up to the zero scale position of scale 5, is equipped with spacing protrudingly 6 on the zero scale position of probe 3, and spacing protrudingly 6 can be when probe 3 falls to zero scale position, withstands the top of probe guide sleeve 2, prevents the whole roll-off of probe 3.
In the above technical solution, the cross section of the probe 3 is square matched with the pore channel 4 of the DPF of the engine particulate filter.
In the technical scheme, the needle end of the probe 3 is a tetrahedral cone, each surface of the tetrahedral cone is provided with an air inlet 3.3, and the needle tip of the needle end of the probe 3 is also provided with the air inlet 3.3. Therefore, 5 air inlets are distributed in the axial direction of 1 and the radial direction of 4, and can effectively clean the blockage in the center of the pore channel and the pore wall of the DPF.
In the technical scheme, the outer side wall of the probe 3 is in clearance fit with the inner side wall of a DPF pore passage 4 of the engine particulate filter.
In the technical scheme, the gap between the outer side wall of the probe 3 and the inner side wall of the DPF pore passage 4 of the engine particulate filter is 0.3-0.5 mm. The probe is ensured to slide with low resistance and high sliding verticality.
In the technical scheme, a plurality of probe through holes 1.1 are formed in the support 1, a plurality of probe guide sleeves 2 are fixed on the support 1, each probe through hole 1.1 is aligned with the corresponding probe guide sleeve 2, a plurality of probes 3 are sleeved into the corresponding probe guide sleeves 2 respectively, each probe 3 can slide up and down in the corresponding probe guide sleeve 2, the front end of each probe 3 penetrates through the corresponding probe through hole 1.1, the outer side wall of each probe 3 is matched with a DPF pore passage 4 of the engine particle filter, an air passage 3.1 is arranged in each probe 3, an air outlet 3.2 communicated with the air passage 3.1 is arranged at the needle head end of each probe 3, an air inlet 3.3 communicated with the air passage 3.1 is arranged at the needle tail of each probe 3, and the air inlet 3.3 is used for communicating with an air source. This design significantly improves the efficiency of plugging detection and cleaning of the DPF channels 4 of the engine particulate filter.
In the above technical scheme, the distance between two adjacent probe through holes 1.1 is equal.
In the technical scheme, the distance between two adjacent probe through holes 1.1 is equal to the distance between two adjacent air inlets of the DPF pore passage 4 of the engine particulate filter.
In the above technical solution, the number of the probes 3 is equal to the maximum number of holes of the DPF of the engine particulate filter along the diameter direction of the cross section, so that the best blockage detection and cleaning efficiency can be ensured. The length of the probe 3 is equal to the depth of the DPF pore channel, so that blockage can be thoroughly cleaned.
A method for detecting and cleaning ash blockage of a diesel engine particle filter pore channel by using the instrument is characterized by comprising the following steps:
step 1: inserting a probe 3 into a pore channel 4 of a particulate filter DPF of an engine to be detected:
step 2: manually pushing the probe 3 to enable the probe 3 to extend into the DPF pore passage 4 of the engine particulate filter to be detected, and if the probe 3 does not feel blocking in the process of extending, indicating that the DPF pore passage 4 of the engine particulate filter to be detected is not blocked;
if the probe 3 is blocked in the extending process, indicating that the DPF pore passage 4 of the engine particulate filter to be detected is blocked, recording the reading of the scale 5 of the probe 3 at the moment, and determining the specific blocking position in the DPF pore passage 4 of the engine particulate filter to be detected;
and step 3: and after the blockage of the DPF pore channel 4 of the engine particle filter to be detected is determined, opening an air source, and blowing away the blockage through the air outlet 3.2 of the probe 3.
The DPF carrier is of a wall-flow type filtering structure, the total pore number is N meshes, wherein 100 meshes of pore channels (A group) are opened at the tail gas inlet break, the tail gas outlet end of the pore channels (A group) is closed by a ceramic carrier, and the other 100 meshes of pore channels (B group) are just opposite to the pore channels (A group). The A group and the B group of channels are distributed in a crossed way (such as a chessboard, shown in figures 1 and 2). The tail gas flows in from the group A pore canal orifice, bypasses to the pore canal wall (porous filtering material) after encountering the group A pore canal choke plug, permeates into the group B pore canal from the pore canal wall (filtering process), and finally flows out of the DPF from the group B pore canal. Therefore, the following steps are carried out: the plugs are deposited on the surfaces of the walls of the channels A, and the tail gas of the channels B is filtered, so that the plugs are not deposited basically. Therefore, the invention is only needed to be used for detecting the blockage of the A pore channel and cleaning an instrument.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (10)
1. The utility model provides a diesel engine particle filter pore ash content blocks up detects and clearance instrument which characterized in that: the probe comprises a support (1), a probe guide sleeve (2) and a probe (3), wherein a probe through hole (1.1) is formed in the support (1), the probe guide sleeve (2) is fixed on the support (1), the probe through hole (1.1) is aligned with the probe guide sleeve (2), the probe (3) is sleeved in the probe guide sleeve (2) and can slide up and down in the probe guide sleeve (2), the front end of the probe (3) penetrates through the probe through hole (1.1), the outer side wall of the probe (3) is matched with a DPF pore passage (4) of an engine particle filter, an air passage (3.1) is formed in the probe (3), an air outlet hole (3.2) communicated with the air passage (3.1) is formed in the needle head end of the probe (3), an air inlet hole (3.3) communicated with the air passage (3.1) is formed in the needle tail of the probe (3), and the air inlet hole (3.3) is used for communicating.
2. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 1, wherein: be equipped with scale (5) on probe (3), the pointed end of probe (3) sets up to the full scale position of scale (5), and the side of the needle tail portion of probe (3) sets up to the zero scale position of scale (5), is equipped with spacing protruding (6) on the zero scale position of probe (3), and spacing protruding (6) can be when probe (3) fall to zero scale position, withstands the top of probe guide sleeve (2), prevents the whole roll-off of probe (3).
3. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 1, wherein: the cross section of the probe (3) is square matched with the pore channels (4) of the DPF of the engine particulate filter.
4. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 1, wherein: the needle head end of probe (3) is the tetrahedral centrum, and every one side of tetrahedral centrum all is equipped with inlet port (3.3), the needle point of the needle head end of probe (3) also is equipped with inlet port (3.3).
5. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 1, wherein: the outer side wall of the probe (3) is in clearance fit with the inner side wall of a DPF pore passage (4) of the engine particulate filter.
6. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 5, wherein: and a gap between the outer side wall of the probe (3) and the inner side wall of the DPF pore passage (4) of the engine particulate filter is 0.3-0.5 mm.
7. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 1, wherein: a plurality of probe through holes (1.1) are formed in the support (1), a plurality of probe guide sleeves (2) are fixed on the support (1), each probe through hole (1.1) is aligned with the corresponding probe guide sleeve (2), a plurality of probes (3) are sleeved in the corresponding probe guide sleeves (2) respectively, and every probe (3) homoenergetic slides from top to bottom in the probe guide sleeve pipe (2) that corresponds, the front end of every probe (3) passes corresponding probe through-hole (1.1), the lateral wall and the engine particulate filter DPF pore (4) of every probe (3) match, be equipped with air flue (3.1) in every probe (3), the syringe needle end of every probe (3) is equipped with venthole (3.2) with air flue (3.1) intercommunication, the backshank of every probe (3) is equipped with inlet port (3.3) with air flue (3.1) intercommunication, inlet port (3.3) are used for the intercommunication air supply.
8. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 7, wherein: the distance between two adjacent probe through holes (1.1) is equal.
9. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 7, wherein: the distance between two adjacent probe through holes (1.1) is equal to the distance between the air inlets of two adjacent engine particle filter DPF pore passages (4).
10. A method for detecting and cleaning clogging of diesel particulate filter cell ash using the apparatus of claim 1, comprising the steps of:
step 1: inserting a probe (3) into a pore channel (4) of a DPF of an engine particulate filter to be detected:
step 2: manually pushing the probe (3) to enable the probe (3) to extend into a DPF pore passage (4) of the engine particulate filter to be detected, and if the probe (3) does not feel blocking in the process of extending, indicating that the DPF pore passage (4) of the engine particulate filter to be detected is not blocked;
if the probe (3) is blocked in the extending process, indicating that the DPF pore passage (4) of the engine particulate filter to be detected is blocked, recording the reading of the graduated scale (5) of the probe (3) at the moment, and determining the specific blocking position in the DPF pore passage (4) of the engine particulate filter to be detected;
and step 3: and after the blockage of the DPF pore channel (4) of the engine particle filter to be detected is determined, opening an air source, and blowing away the blockage through an air outlet (3.2) of the probe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016283.8A CN110608082A (en) | 2019-10-24 | 2019-10-24 | Instrument and method for detecting and cleaning ash blockage of diesel engine particle filter pore channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016283.8A CN110608082A (en) | 2019-10-24 | 2019-10-24 | Instrument and method for detecting and cleaning ash blockage of diesel engine particle filter pore channel |
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| Publication Number | Publication Date |
|---|---|
| CN110608082A true CN110608082A (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911016283.8A Pending CN110608082A (en) | 2019-10-24 | 2019-10-24 | Instrument and method for detecting and cleaning ash blockage of diesel engine particle filter pore channel |
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Citations (6)
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|---|---|---|---|---|
| US20080120968A1 (en) * | 2006-11-29 | 2008-05-29 | Douglas Munroe Beall | Partial wall-flow filter and diesel exhaust system and method |
| JP2011137445A (en) * | 2009-12-01 | 2011-07-14 | Ngk Insulators Ltd | Method and device for detecting accumulation amount of particulate matter |
| US20110252768A1 (en) * | 2010-04-20 | 2011-10-20 | Robert Bosch Gmbh | Method and apparatus for the self-diagnosis of an exhaust gas probe |
| CN107747505A (en) * | 2017-08-16 | 2018-03-02 | 江苏大学 | A kind of system and control method that DPF is alternately regenerated using engine exhaust |
| CN108465310A (en) * | 2017-02-23 | 2018-08-31 | 山东盛华投资有限责任公司 | A kind of dust-extraction unit |
| CN210919204U (en) * | 2019-10-24 | 2020-07-03 | 东风商用车有限公司 | Diesel engine particle filter pore ash blockage detecting and cleaning instrument |
-
2019
- 2019-10-24 CN CN201911016283.8A patent/CN110608082A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080120968A1 (en) * | 2006-11-29 | 2008-05-29 | Douglas Munroe Beall | Partial wall-flow filter and diesel exhaust system and method |
| JP2011137445A (en) * | 2009-12-01 | 2011-07-14 | Ngk Insulators Ltd | Method and device for detecting accumulation amount of particulate matter |
| US20110252768A1 (en) * | 2010-04-20 | 2011-10-20 | Robert Bosch Gmbh | Method and apparatus for the self-diagnosis of an exhaust gas probe |
| CN108465310A (en) * | 2017-02-23 | 2018-08-31 | 山东盛华投资有限责任公司 | A kind of dust-extraction unit |
| CN107747505A (en) * | 2017-08-16 | 2018-03-02 | 江苏大学 | A kind of system and control method that DPF is alternately regenerated using engine exhaust |
| CN210919204U (en) * | 2019-10-24 | 2020-07-03 | 东风商用车有限公司 | Diesel engine particle filter pore ash blockage detecting and cleaning instrument |
Non-Patent Citations (1)
| Title |
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| 姚广涛;毛明;姜大海;刘宏威;资新运;: "柴油机运行参数对颗粒过滤器压降特性影响的试验研究", 装甲兵工程学院学报, no. 04, 15 August 2012 (2012-08-15), pages 26 - 29 * |
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