CN210919204U

CN210919204U - Diesel engine particle filter pore ash blockage detecting and cleaning instrument

Info

Publication number: CN210919204U
Application number: CN201921796279.3U
Authority: CN
Inventors: 杨帆; 庞磊; 刘诗逸
Original assignee: Dongfeng Trucks Co ltd
Current assignee: Dongfeng Trucks Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-07-03
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a diesel engine particle filter pore ash blocking up detects and clearance instrument, it includes support, probe guide sleeve and probe, wherein, the probe through-hole has been seted up on the support, is fixed with probe guide sleeve on the support, and the probe through-hole aligns with probe guide sleeve, the probe embolias in the probe guide sleeve to can slide from top to bottom in the probe guide sleeve, the probe through-hole is passed to the front end of probe, and the lateral wall and the engine particle filter DPF pore of probe match, are equipped with the air flue in the probe, and the syringe needle end of probe is equipped with the venthole with the air flue intercommunication, and the backshank of probe is equipped with the inlet port with the air flue intercommunication, the inlet port is used for the intercommunication air supply. The utility model discloses can the accurate determination plug position relative to the pore to clear away the plug.

Description

Diesel engine particle filter pore ash blockage detecting and cleaning instrument

Technical Field

The utility model relates to an automobile inspection instrument field specifically indicates a diesel engine particle filter pore ash content blocks up and detects and clearance instrument.

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.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a diesel engine particle filter pore ash content blocks up and detects and clearance instrument, the utility model discloses can the position of accurate determination plug for the pore to clear away the plug.

For realizing this purpose, the utility model discloses a diesel engine particle filter pore ash blocking up detects and clearance instrument, its 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.

The utility model has the advantages that:

the utility model discloses whether can the snap judgments engine particulate filter DPF pore have the jam to the position that the jam took place for the accurate definite, in addition, the utility model discloses only clear up the engine particulate filter DPF pore that has the jam through compressed air, compare the mode that traditional approach cleared up all engine particulate filter DPF pores, the utility model discloses after the pore of jam is fixed a position, use probe spun compressed air to clear up the pore immediately at the normal position, do not have any action to the pore that does not block up, the utility model discloses reduce the damage to the DPF pore, improved the life in DPF pore.

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 structural 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 comprises 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, only need use the utility model discloses block up to A pore and detect and the clearance instrument can.

Details not described in this specification are within the skill of the art that are well known to those skilled in the art.

Claims

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. The diesel particulate filter cell ash blockage detection and cleaning instrument of claim 7, wherein: the number of the probes (3) is equal to the maximum number of holes of the engine particulate filter DPF along the diameter direction of the section.