EP1316687A1 - Particulate filter for diesel engines - Google Patents
Particulate filter for diesel engines Download PDFInfo
- Publication number
- EP1316687A1 EP1316687A1 EP02079020A EP02079020A EP1316687A1 EP 1316687 A1 EP1316687 A1 EP 1316687A1 EP 02079020 A EP02079020 A EP 02079020A EP 02079020 A EP02079020 A EP 02079020A EP 1316687 A1 EP1316687 A1 EP 1316687A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- housing
- bores
- particulate filter
- filter
- 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.)
- Withdrawn
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Images
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
- F01N3/0217—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 the filtering elements having the form of hollow cylindrical bodies
-
- 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
- F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0222—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
-
- 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
- F01N3/0233—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 periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
-
- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
Definitions
- the present invention relates to a particulate filter for the exhaust system of a diesel engine.
- particulate filters in the exhaust system of a diesel engine.
- the filter material usually a honeycomb structure
- a particulate filter collects particles in the exhaust gases, and burns the particles off continuously or at regular intervals. Not all the particulate matter is fully combusted, and there is a risk that some residual ashes will remain which plug up and partially block the filter over the life of the diesel engine.
- the only known methods for removing these ashes are mechanical operations. For motor vehicles with diesel engines, the known methods require a service at around 80000 km (for the vehicle), when the filter material of the particulate filter is cleaned with a high pressure cleaner.
- An alternative system includes exhaust valves which invert the direction of exhaust gas flow through the filter material, thereby blowing the ashes off the filter surface.
- the present invention aims to provide a simplified arrangement for removing ashes from a particulate filter.
- a particulate filter in accordance with the present invention for positioning in an exhaust system from a diesel engine, comprises a housing; the housing having a first end with a opening for the flow of exhaust gases, and a second end with an opening for the flow of exhaust gases; and a filter substrate positioned inside the housing between the opening in the first end and the opening in the second end, the filter substrate having a first surface open to the opening in the first end but substantially closed from the opening in the second end, and a second surface open to the opening in the second end but substantially closed from the opening in the first end; wherein the first surface and the second surface are capable of trapping ash material; and wherein the opening in the first end is substantially identical to the opening in the second end such that the housing can be positioned in the exhaust system either with the opening in the first end allowing flow of exhaust gases into the housing from the diesel engine, or with the opening in the second end allowing flow of exhaust gases into the housing from the diesel engine.
- the position of the particulate filter can be reversed relative to the exhaust system to provide easy removal of trapped ash material.
- a particulate filter 10 in accordance with the present invention is for positioning in the exhaust system 12 from a diesel engine 14.
- the particulate filter 10 traps particles in the exhaust gases from the diesel engine and combusts the particles. Ash material may be formed as a result of the combustion process.
- the particulate filter 10 comprises a housing 20 having a first end 22 and a second end 24.
- the first end 22 has an opening 26 formed therein.
- the second end 24 has an opening 28 formed therein.
- the openings 26, 28 are substantially identical in shape, size and configuration.
- the housing 20 is preferably substantially symmetrical, with the first and second ends 22, 24 being substantially identical and at axially opposed ends of the housing.
- the filter substrate 30 Positioned and secured inside the housing 20 is a filter substrate 30 (shown in enlarged form in Figure 3).
- the filter substrate 30 has a substantially symmetrical configuration, with a honeycomb structure defining a number of axially extending first bores 32 and a number of axially extending second bores 32'.
- the first and second bores 32,32' are positioned adjacent one another.
- Each first bore 32 has an open end 34, and a closed or plugged end 36.
- Each second bore 32' has an open end 34', and a closed or plugged end 36'.
- the walls 38 separating the first and second bores 32,32' are formed from the filter material.
- the open ends 34 of the first bores 32 are positioned adjacent the closed ends 36' of the second bores 32', and the open ends 34' of the second bores are positioned adjacent the closed ends 36 of the first bores.
- the open ends 34 of the first bores 32 open to the opening 26 in the first end 22, and the closed ends 36 are closed to the opening 28 in the second end 24.
- the open ends 34' of the second bores 32' open to the opening 28 in the second end 24, and the closed ends 36' are closed to the opening 26 in the first end 22.
- Each filter substrate 30 therefore has a first surface 40 (defined by the walls of the first bores 32) open to the first end 22, but substantially closed to the second end 24; and a second surface 42 (defined by the walls of the second bores 32') open to the second end, but substantially closed to the first end. Ash material formed during the combustion process is trapped on one of the first or second surfaces 40, 42.
- the opening 26 in the first end 22 receives exhaust gases from the diesel engine 14, and the opening 28 in the second end 24 is connected to atmosphere.
- Exhaust gas flow through the particulate filter 10 is indicated by the arrows in Figure 3.
- Ash material formed during the combustion process is trapped on the first surface 40 of the filter substrate 30.
- the particulate filter 10 requires maintenance and removal of the ash.
- the particulate filter 10 is removed from the exhaust system 12 and then reinstalled in the reverse position. At this stage, the opening 28 in the second end 24 receives exhaust gases from the diesel engine 14, and the opening 26 in the first end 22 is connected to atmosphere.
- Exhaust gas flow through the particulate filter 10 is indicated by the arrows in Figure 4.
- Ash previously trapped on the first surface 40 is blown off the filter substrate 30 and into the atmosphere during a light-off phase of the exhaust emissions cycle.
- New ash material formed during the combustion process is trapped on the second surface 42 of the filter substrate 30.
- FIG. 5 An alternative embodiment for the configuration of a particulate filter 100 in accordance with the present invention is shown in Figure 5. Like parts have been given the same reference numeral as in Figures 1 to 4.
- the honeycomb structure of the filter substrate 30 has been replaced by a ceramic mesh-type filter 44.
- the ceramic filter 44 has the configuration of an enlarged thick-walled tube 38 which is spaced from the housing 20 by an axially extending gap 32'. At one end 36', the gap 32' is closed, whilst the other end 34' of the gap is open. The adjacent ends 34,36 of bore 32 of the ceramic filter 44 are open and closed respectively.
- the operation of the particulate filter 100 is substantially the same as the particulate filter of Figures 1 to 4, except that ashes may accumulate inside the filter material as well as on the surface thereof. As described above, at regular intervals the position of the particulate filter 100 is reversed relative to the exhaust system 12 for the removal of ash.
- the ceramic filter may be replaced by a foam-type filter of similar configuration.
- the present invention has particular application in motor vehicles having a diesel engine, but may be used with diesel engines having an alternative use.
- the present invention also applies to catalytic converters whose position, relative to the exhaust system, is reversed at regular intervals.
- the poisoned inlet side of the catalytic converter is moved to the outlet, and the cleaner outlet becomes the inlet side, thereby improving emissions during the light-off phase of the emissions cycle.
Abstract
A particulate filter (10) for positioning in an exhaust system (12)
from a diesel engine (14) comprising a housing (20); the housing having a first
end (22) with a opening (26) for the flow of exhaust gases, and a second end
(24) with an opening (28) for the flow of exhaust gases; and a filter substrate
(30) positioned inside the housing between the opening in the first end and the
opening in the second end, the filter substrate having a first surface (40) open to
the opening in the first end but substantially closed from the opening in the
second end, and a second surface (42) open to the opening in the second end but
substantially closed from the opening in the first end; wherein the first surface
and the second surface are capable of trapping ash material; and wherein the
opening in the first end is substantially identical to the opening in the second
end such that the housing can be positioned in the exhaust system either with the
opening in the first end allowing flow of exhaust gases into the housing from the
diesel engine, or with the opening in the second end allowing flow of exhaust
gases into the housing from the diesel engine. Ash removal from the filter
substrate can be easily achieved by reversing the position of the particulate filter
relative to the exhaust system.
Description
- The present invention relates to a particulate filter for the exhaust system of a diesel engine.
- It is known to provide particulate filters in the exhaust system of a diesel engine. The filter material (usually a honeycomb structure) in a particulate filter collects particles in the exhaust gases, and burns the particles off continuously or at regular intervals. Not all the particulate matter is fully combusted, and there is a risk that some residual ashes will remain which plug up and partially block the filter over the life of the diesel engine. The only known methods for removing these ashes are mechanical operations. For motor vehicles with diesel engines, the known methods require a service at around 80000 km (for the vehicle), when the filter material of the particulate filter is cleaned with a high pressure cleaner. An alternative system includes exhaust valves which invert the direction of exhaust gas flow through the filter material, thereby blowing the ashes off the filter surface.
- The present invention aims to provide a simplified arrangement for removing ashes from a particulate filter.
- A particulate filter in accordance with the present invention, for positioning in an exhaust system from a diesel engine, comprises a housing; the housing having a first end with a opening for the flow of exhaust gases, and a second end with an opening for the flow of exhaust gases; and a filter substrate positioned inside the housing between the opening in the first end and the opening in the second end, the filter substrate having a first surface open to the opening in the first end but substantially closed from the opening in the second end, and a second surface open to the opening in the second end but substantially closed from the opening in the first end; wherein the first surface and the second surface are capable of trapping ash material; and wherein the opening in the first end is substantially identical to the opening in the second end such that the housing can be positioned in the exhaust system either with the opening in the first end allowing flow of exhaust gases into the housing from the diesel engine, or with the opening in the second end allowing flow of exhaust gases into the housing from the diesel engine.
- In the present invention, the position of the particulate filter can be reversed relative to the exhaust system to provide easy removal of trapped ash material.
- The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:-
- Figure 1 is a schematic view of a particulate filter in accordance with the present invention positioned in the exhaust system of a diesel engine;
- Figure 2 is a perspective view of the particulate filter of Figure 1;
- Figure 3 is a cross-sectional view of the particulate filter of Figures 1 and 2 in a first position relative to the exhaust system;
- Figure 4 is a cross-sectional view of the particulate filter of Figures 1 and 2 in a second position relative to the exhaust system; and
- Figure 5 is a cross-sectional view of an alternative embodiment of particulate filter in accordance with the present invention.
-
- Referring to Figure 1, a
particulate filter 10 in accordance with the present invention is for positioning in theexhaust system 12 from adiesel engine 14. Theparticulate filter 10 traps particles in the exhaust gases from the diesel engine and combusts the particles. Ash material may be formed as a result of the combustion process. - Referring to Figures 2 and 3, the
particulate filter 10 comprises ahousing 20 having afirst end 22 and asecond end 24. Thefirst end 22 has an opening 26 formed therein. Thesecond end 24 has an opening 28 formed therein. Theopenings housing 20 is preferably substantially symmetrical, with the first andsecond ends - Positioned and secured inside the
housing 20 is a filter substrate 30 (shown in enlarged form in Figure 3). Thefilter substrate 30 has a substantially symmetrical configuration, with a honeycomb structure defining a number of axially extendingfirst bores 32 and a number of axially extending second bores 32'. The first andsecond bores 32,32' are positioned adjacent one another. Eachfirst bore 32 has anopen end 34, and a closed orplugged end 36. Each second bore 32' has an open end 34', and a closed or plugged end 36'. Thewalls 38 separating the first andsecond bores 32,32' are formed from the filter material. Theopen ends 34 of thefirst bores 32 are positioned adjacent the closed ends 36' of the second bores 32', and the open ends 34' of the second bores are positioned adjacent the closedends 36 of the first bores. Theopen ends 34 of thefirst bores 32 open to the opening 26 in thefirst end 22, and the closedends 36 are closed to the opening 28 in thesecond end 24. The open ends 34' of the second bores 32' open to the opening 28 in thesecond end 24, and the closed ends 36' are closed to the opening 26 in thefirst end 22. With this arrangement, exhaust gases (passing through the particulate filter 10) enter and pass along thefirst bores 32, pass through the filter material defining thewalls 38 between the bores, and then pass through (and out of) the second bores 32'. Eachfilter substrate 30 therefore has a first surface 40 (defined by the walls of the first bores 32) open to thefirst end 22, but substantially closed to thesecond end 24; and a second surface 42 (defined by the walls of the second bores 32') open to the second end, but substantially closed to the first end. Ash material formed during the combustion process is trapped on one of the first orsecond surfaces - In use, on initial installation of the
particulate filter 10 in theexhaust system 12, the opening 26 in thefirst end 22 receives exhaust gases from thediesel engine 14, and the opening 28 in thesecond end 24 is connected to atmosphere. Exhaust gas flow through theparticulate filter 10 is indicated by the arrows in Figure 3. Ash material formed during the combustion process is trapped on thefirst surface 40 of thefilter substrate 30. After an appropriate period, theparticulate filter 10 requires maintenance and removal of the ash. With the present invention, theparticulate filter 10 is removed from theexhaust system 12 and then reinstalled in the reverse position. At this stage, the opening 28 in thesecond end 24 receives exhaust gases from thediesel engine 14, and the opening 26 in thefirst end 22 is connected to atmosphere. Exhaust gas flow through theparticulate filter 10 is indicated by the arrows in Figure 4. Ash previously trapped on thefirst surface 40 is blown off thefilter substrate 30 and into the atmosphere during a light-off phase of the exhaust emissions cycle. New ash material formed during the combustion process is trapped on thesecond surface 42 of thefilter substrate 30. - By reversing the position of the
particulate filter 10 at regular intervals relative to theexhaust system 12, the problem of ash accumulation is resolved in a simple and easy manner, without having to resort to mechanical cleaning, and without the need for special exhaust valves. - An alternative embodiment for the configuration of a
particulate filter 100 in accordance with the present invention is shown in Figure 5. Like parts have been given the same reference numeral as in Figures 1 to 4. In this alternative embodiment, the honeycomb structure of thefilter substrate 30 has been replaced by a ceramic mesh-type filter 44. Theceramic filter 44 has the configuration of an enlarged thick-walled tube 38 which is spaced from thehousing 20 by an axially extending gap 32'. At one end 36', the gap 32' is closed, whilst the other end 34' of the gap is open. Theadjacent ends bore 32 of theceramic filter 44 are open and closed respectively. The operation of theparticulate filter 100 is substantially the same as the particulate filter of Figures 1 to 4, except that ashes may accumulate inside the filter material as well as on the surface thereof. As described above, at regular intervals the position of theparticulate filter 100 is reversed relative to theexhaust system 12 for the removal of ash. In a further alternative, the ceramic filter may be replaced by a foam-type filter of similar configuration. - The present invention has particular application in motor vehicles having a diesel engine, but may be used with diesel engines having an alternative use.
- The present invention also applies to catalytic converters whose position, relative to the exhaust system, is reversed at regular intervals. The poisoned inlet side of the catalytic converter is moved to the outlet, and the cleaner outlet becomes the inlet side, thereby improving emissions during the light-off phase of the emissions cycle.
Claims (5)
- A particulate filter for positioning in an exhaust system from a diesel engine comprising a housing; the housing having a first end with a opening for the flow of exhaust gases, and a second end with an opening for the flow of exhaust gases; and a filter substrate positioned inside the housing between the opening in the first end and the opening in the second end, the filter substrate having a first surface open to the opening in the first end but substantially closed from the opening in the second end, and a second surface open to the opening in the second end but substantially closed from the opening in the first end; wherein the first surface and the second surface are capable of trapping ash material; and wherein the opening in the first end is substantially identical to the opening in the second end such that the housing can be positioned in the exhaust system either with the opening in the first end allowing flow of exhaust gases into the housing from the diesel engine, or with the opening in the second end allowing flow of exhaust gases into the housing from the diesel engine.
- A particulate filter as claimed in Claim 1, wherein the first and second ends of the housing are at axially opposite end of the housing.
- A particulate filter as claimed in Claim 1 or Claim 2, wherein the first and second ends of the housing are substantially identical.
- A particulate filter as claimed in any one of Claims 1 to 3, wherein the filter substrate comprises a number of axially extending first bores, a number of axially extending second bores, the first and second bores being positioned adjacent one another, filter material defining the walls between adjacent first and second bores, each bore having an open end and a closed end, with the open ends of the first bores positioned adjacent the closed ends of the second bores, with the open ends of the second bores positioned adjacent the closed ends of the first bores, and with the walls of the first bores forming the first surface and the walls of the second bores forming the second surface.
- A particulate filter as claimed in any one of Claims 1 to 3, wherein the filter substrate comprises an axially extending bore; and wherein the filter substrate is spaced from the housing by an axially extending gap; the axially extending bore being open at one end and closed at the other end, with the radially adjacent ends of the gap being closed and open respectively.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0128772 | 2001-12-03 | ||
GB0128772A GB0128772D0 (en) | 2001-12-03 | 2001-12-03 | Diesel particulate filter |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1316687A1 true EP1316687A1 (en) | 2003-06-04 |
Family
ID=9926804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02079020A Withdrawn EP1316687A1 (en) | 2001-12-03 | 2002-09-30 | Particulate filter for diesel engines |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1316687A1 (en) |
GB (1) | GB0128772D0 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007052084A1 (en) * | 2005-10-31 | 2007-05-10 | Aristotle University Thessaloniki - Research Committee | Filtering device for diesel engine exhaust gas |
CN113882935A (en) * | 2021-09-24 | 2022-01-04 | 中国第一汽车股份有限公司 | Particulate matter collection device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0603392A1 (en) * | 1992-05-13 | 1994-06-29 | Sumitomo Electric Industries, Ltd | Particulate trap for purifying diesel engine exhaust gas |
DE19708549A1 (en) * | 1997-03-05 | 1998-09-10 | Andreas Gifhorn | Gas purification apparatus |
US20010017026A1 (en) * | 2000-01-28 | 2001-08-30 | Bruce Peters | Regenerable particle filter for the removal of soot particles from exhaust gases |
-
2001
- 2001-12-03 GB GB0128772A patent/GB0128772D0/en not_active Ceased
-
2002
- 2002-09-30 EP EP02079020A patent/EP1316687A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0603392A1 (en) * | 1992-05-13 | 1994-06-29 | Sumitomo Electric Industries, Ltd | Particulate trap for purifying diesel engine exhaust gas |
DE19708549A1 (en) * | 1997-03-05 | 1998-09-10 | Andreas Gifhorn | Gas purification apparatus |
US20010017026A1 (en) * | 2000-01-28 | 2001-08-30 | Bruce Peters | Regenerable particle filter for the removal of soot particles from exhaust gases |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007052084A1 (en) * | 2005-10-31 | 2007-05-10 | Aristotle University Thessaloniki - Research Committee | Filtering device for diesel engine exhaust gas |
GR20050100558A (en) * | 2005-10-31 | 2007-05-23 | Αριστοτελειο Πανεπιστημιο Θεσσαλονικης-Ειδικος Λογαριασμος Αξιοποιησης Κονδυλιων Ερευνας | Metal foam catalytic filter for diesel engine exhaust gas |
US7935163B2 (en) | 2005-10-31 | 2011-05-03 | Aristotle University Thessaloniki | Filtering device for diesel engine exhaust gas |
CN101300058B (en) * | 2005-10-31 | 2012-11-14 | 塞萨洛尼基亚里士多德大学研究委员会 | Filtering device for diesel engine exhaust gas |
CN113882935A (en) * | 2021-09-24 | 2022-01-04 | 中国第一汽车股份有限公司 | Particulate matter collection device |
Also Published As
Publication number | Publication date |
---|---|
GB0128772D0 (en) | 2002-01-23 |
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