US20070256410A1 - Diesel particulate filter service method - Google Patents
Diesel particulate filter service method Download PDFInfo
- Publication number
- US20070256410A1 US20070256410A1 US11/382,103 US38210306A US2007256410A1 US 20070256410 A1 US20070256410 A1 US 20070256410A1 US 38210306 A US38210306 A US 38210306A US 2007256410 A1 US2007256410 A1 US 2007256410A1
- Authority
- US
- United States
- Prior art keywords
- ash
- filter
- engine
- diesel particulate
- motor vehicle
- 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.)
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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
- 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
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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
- F01N3/0237—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 for regenerating ex situ
Definitions
- the present invention relates to a method for cleaning a diesel particulate filter for a motor vehicle.
- Diesel engines are efficient, durable and economical. Diesel exhaust, however, can harm both the environment and people. To reduce this harm governments, such as the United States and the European Union, have proposed stricter diesel exhaust emission regulations. These environmental regulations require diesel engines to nearly meet the same pollution emission standards as gasoline engines.
- Diesel particulate material is mainly carbon particles or soot.
- Diesel traps One way to remove soot from diesel exhaust is with diesel traps.
- the most widely used diesel trap is a diesel particulate filter which nearly completely filters the soot without hindering exhaust flow.
- the most widely used diesel trap is a diesel particulate filter which nearly completely filters the soot without hindering exhaust flow.
- the lower permeability of the soot layer causes a pressure drop in the filter and a gradual rise in the back pressure of the filter against the engine. This phenomenon causes the engine to work harder, thus decreasing engine operating efficiency.
- the pressure drop in the filter and decreased engine efficiency becomes unacceptable, and the filter must either be replaced or the accumulated diesel soot must be cleaned out.
- the filter is cleaned of accumulated diesel soot by burning-off or oxidation of the diesel soot to carbon dioxide which is known as regeneration. Regeneration of an existing filter is superior to filter replacement, because no interruption for service is necessary.
- the filter In addition to capturing carbon soot, the filter also traps ash particles, such as metal oxides, that are carried by the exhaust gas. These particles are not combustible and, therefore, are not removed during regeneration. The filter must therefore be cleaned or discarded when the ash particles in the filter build up to high levels.
- ash particles such as metal oxides
- an economical way of cleaning the ash from a diesel particulate filter of a motor vehicle typically using equipment already available in a service shop.
- the method of the invention disconnects first and second conduits of a filter apparatus's housing from the entrance tubing and exit tubing respectively of a motor vehicle's exhaust system.
- a diesel particulate filter is within the housing.
- the filter apparatus is reversed.
- the first conduit is now reconnected to the exit tubing and the second conduit reconnects to the entrance tubing.
- the engine is started and allowed to run at a high idle and no load engine speed.
- the engine acts like a mass flow generator to blow ash from the diesel particulate filter into the exit tubing.
- the ash is then collected with an ash collector.
- FIG. 1 is a side view of an engine and filter apparatus in the first configuration before cleaning ash with the diesel particulate filter in phantom;
- FIG. 2 is a side view of an engine and filter apparatus in the second configuration for cleaning ash with the diesel particulate filter in phantom.
- the present invention relates to a method for cleaning ash from a diesel particulate filter 20 used for treating diesel exhaust gases from a diesel engine 12 in a motor vehicle.
- the engine 12 is in fluid communication with the filter apparatus 10 through entrance tubing 14 at the inlet side of the filter apparatus 10 .
- Treated exhaust flows from the filter apparatus 10 through exit tubing 16 at the outlet side of the filter apparatus 10 .
- the filter apparatus 10 has a housing 22 and a diesel particulate filter 20 disposed therein.
- the filter apparatus 10 may connect with a catalytic device 18 located between the engine 12 and the filter apparatus 10 .
- the housing 22 has a first conduit 24 in fluid communication with the entrance tubing 14 .
- the opposite second conduit 26 is in fluid communication with the exit tubing 16 .
- the filter apparatus 10 is first removed from the motor vehicle.
- the second conduit 26 is disconnected from the exit tubing 16
- the first conduit 24 is disconnected from the entrance tubing 14 .
- the filter apparatus 10 is reinstalled in the motor vehicle in the opposite direction as shown in FIG. 2 .
- the first conduit 24 connects to the exit tubing 16 .
- the second conduit 26 connects to the entrance tubing 14 .
- the engine 12 is started and allowed to increase to a high idle with no load.
- the engine exhaust produced by the idling engine 12 is filtered by the diesel particulate filter 20 .
- the flow of engine exhaust blows the ash from the diesel particulate filter 20 along with the filtered engine exhaust and into the exit tubing 16 and out of the motor vehicle.
- the ash is then collected from the exit tubing 16 with an ash collector 32 in fluid communication with the exit tubing 16 .
- the ash collector 32 can be any type of receptacle, such as a vacuum, or an inline ash filter 28 .
- the inline ash filter 28 is in fluid communication with the exit tubing 16 and the receptacle or a service shop exhaust system 30 .
- the inline ash filter 28 separates the ash particles from the exhaust gases and traps the ash particles. The separated exhaust gases then flow from the inline ash filter 28 to the shop exhaust system and vent into the environment.
- the ash collector 32 is removed from the exit tubing 16 .
- the filter apparatus 10 can be disconnected from the entrance tubing 14 and the exit tubing 16 and reconnected in the original filter configuration.
- the method of the invention has a number of advantages.
- the method removes the ash from the diesel particulate filter faster, requiring less preparation.
- This method also provides an improved way to handle the ash particles.
- This method uses the motor vehicle's own engine that is being serviced, as well as equipment already available in the service shop.
- the filter handling requirement for this method is reduced and thus has a lower risk of damage to the filter. Furthermore, the service technicians are less exposed to ash particles.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a method for cleaning a diesel particulate filter for a motor vehicle.
- 2. Description of the Prior Art
- Diesel engines are efficient, durable and economical. Diesel exhaust, however, can harm both the environment and people. To reduce this harm governments, such as the United States and the European Union, have proposed stricter diesel exhaust emission regulations. These environmental regulations require diesel engines to nearly meet the same pollution emission standards as gasoline engines.
- One part of diesel exhaust includes diesel particulate material. Diesel particulate material is mainly carbon particles or soot. One way to remove soot from diesel exhaust is with diesel traps. The most widely used diesel trap is a diesel particulate filter which nearly completely filters the soot without hindering exhaust flow. As a layer of soot collects on the surfaces of the inlet channels of the filter, the lower permeability of the soot layer causes a pressure drop in the filter and a gradual rise in the back pressure of the filter against the engine. This phenomenon causes the engine to work harder, thus decreasing engine operating efficiency. Eventually, the pressure drop in the filter and decreased engine efficiency becomes unacceptable, and the filter must either be replaced or the accumulated diesel soot must be cleaned out.
- The filter is cleaned of accumulated diesel soot by burning-off or oxidation of the diesel soot to carbon dioxide which is known as regeneration. Regeneration of an existing filter is superior to filter replacement, because no interruption for service is necessary.
- In addition to capturing carbon soot, the filter also traps ash particles, such as metal oxides, that are carried by the exhaust gas. These particles are not combustible and, therefore, are not removed during regeneration. The filter must therefore be cleaned or discarded when the ash particles in the filter build up to high levels.
- Cleaning ash from a diesel particulate filter is not easily accomplished with typical maintenance shop equipment. The use of shop air to blow out the ash particles does not lend itself to containment of the ash particles. The use of a wet/dry vacuum tool has limited effectiveness on smaller and deeply embedded particles. The use of water or solvents can be detrimental to the substrate and/or washcoat.
- One method exposes the filter to excessive handling which increases the potential for inadvertent damage to this expensive component. This method also suggests precautionary methods such as paint masks, safety goggles, and gloves prior to servicing a filter due to the potential for exposure to the hazardous ash particles.
- To avoid this dangerous mess, specialized filter cleaning equipment has been developed. The equipment, however, is expensive to purchase for the service shop, which would make the cost of cleaning expensive for the motor vehicle owner.
- Therefore, it would be advantageous to develop a method to quickly and easily clean the ash particles from the filter. It would be further advantageous to clean the filter without using costly additional equipment.
- According to the invention there is provided an economical way of cleaning the ash from a diesel particulate filter of a motor vehicle, typically using equipment already available in a service shop. The method of the invention disconnects first and second conduits of a filter apparatus's housing from the entrance tubing and exit tubing respectively of a motor vehicle's exhaust system. A diesel particulate filter is within the housing. The filter apparatus is reversed. The first conduit is now reconnected to the exit tubing and the second conduit reconnects to the entrance tubing.
- The engine is started and allowed to run at a high idle and no load engine speed. The engine acts like a mass flow generator to blow ash from the diesel particulate filter into the exit tubing. The ash is then collected with an ash collector.
- Additional effects, features and advantages will be apparent in the written description that follows.
- The novel features believed characteristic of the invention are set forth in the appended claims. The invention itself however, as well as a preferred mode of use, further objects and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings, wherein:
-
FIG. 1 is a side view of an engine and filter apparatus in the first configuration before cleaning ash with the diesel particulate filter in phantom; and -
FIG. 2 is a side view of an engine and filter apparatus in the second configuration for cleaning ash with the diesel particulate filter in phantom. - Turning to the Figures where like reference numerals refer to like structures, the present invention relates to a method for cleaning ash from a
diesel particulate filter 20 used for treating diesel exhaust gases from adiesel engine 12 in a motor vehicle. - The
engine 12 is in fluid communication with thefilter apparatus 10 throughentrance tubing 14 at the inlet side of thefilter apparatus 10. Treated exhaust flows from thefilter apparatus 10 throughexit tubing 16 at the outlet side of thefilter apparatus 10. - As shown in
FIG. 1 , thefilter apparatus 10 has ahousing 22 and adiesel particulate filter 20 disposed therein. Thefilter apparatus 10 may connect with acatalytic device 18 located between theengine 12 and thefilter apparatus 10. Thehousing 22 has afirst conduit 24 in fluid communication with theentrance tubing 14. The oppositesecond conduit 26 is in fluid communication with theexit tubing 16. - To clean the
diesel particulate filter 20, thefilter apparatus 10 is first removed from the motor vehicle. Thesecond conduit 26 is disconnected from theexit tubing 16, and thefirst conduit 24 is disconnected from theentrance tubing 14. - Next, the
filter apparatus 10 is reinstalled in the motor vehicle in the opposite direction as shown inFIG. 2 . Thefirst conduit 24 connects to theexit tubing 16. Thesecond conduit 26 connects to theentrance tubing 14. - To clean the ash from the
diesel particulate filter 20, theengine 12 is started and allowed to increase to a high idle with no load. The engine exhaust produced by theidling engine 12 is filtered by thediesel particulate filter 20. The flow of engine exhaust blows the ash from thediesel particulate filter 20 along with the filtered engine exhaust and into theexit tubing 16 and out of the motor vehicle. The ash is then collected from theexit tubing 16 with anash collector 32 in fluid communication with theexit tubing 16. - The
ash collector 32 can be any type of receptacle, such as a vacuum, or aninline ash filter 28. Preferably theinline ash filter 28 is in fluid communication with theexit tubing 16 and the receptacle or a serviceshop exhaust system 30. Theinline ash filter 28 separates the ash particles from the exhaust gases and traps the ash particles. The separated exhaust gases then flow from theinline ash filter 28 to the shop exhaust system and vent into the environment. Once the ash is removed from thediesel particulate filter 20, theash collector 32 is removed from theexit tubing 16. Thefilter apparatus 10 can be disconnected from theentrance tubing 14 and theexit tubing 16 and reconnected in the original filter configuration. - The method of the invention has a number of advantages. The method removes the ash from the diesel particulate filter faster, requiring less preparation. This method also provides an improved way to handle the ash particles. This method uses the motor vehicle's own engine that is being serviced, as well as equipment already available in the service shop. The filter handling requirement for this method is reduced and thus has a lower risk of damage to the filter. Furthermore, the service technicians are less exposed to ash particles.
- While the invention is shown in only one of its forms, it is not thus limited but is susceptible to various changes and modifications without departing from the spirit and scope of the invention.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/382,103 US7296402B1 (en) | 2006-05-08 | 2006-05-08 | Diesel particulate filter service method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/382,103 US7296402B1 (en) | 2006-05-08 | 2006-05-08 | Diesel particulate filter service method |
Publications (2)
Publication Number | Publication Date |
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US20070256410A1 true US20070256410A1 (en) | 2007-11-08 |
US7296402B1 US7296402B1 (en) | 2007-11-20 |
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Application Number | Title | Priority Date | Filing Date |
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US11/382,103 Expired - Fee Related US7296402B1 (en) | 2006-05-08 | 2006-05-08 | Diesel particulate filter service method |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104040124A (en) * | 2012-01-03 | 2014-09-10 | 沃尔沃拉斯特瓦格纳公司 | Method and arrangement for cleaning a particle filter |
US20160312675A1 (en) * | 2015-04-23 | 2016-10-27 | Cummins Emission Solutions, Inc. | Component performance recovery via inlet and outlet swap |
US11867112B1 (en) | 2023-03-07 | 2024-01-09 | International Engine Intellectual Property Company, Llc | Logic for improved delta pressure based soot estimation on low restriction particulate filters |
US11994056B1 (en) | 2023-03-07 | 2024-05-28 | International Engine Intellectual Property Company, Llc | Logic for improved delta pressure based soot estimation on low restriction particulate filters |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10279295B2 (en) * | 2009-03-03 | 2019-05-07 | Filtration Group Corporation | Methods, apparatus and products for filtering |
US9675919B2 (en) | 2011-08-19 | 2017-06-13 | Corning Incorporated | Method to enhance the ash storage capacity of a particulate filter |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5725618A (en) * | 1995-10-16 | 1998-03-10 | Hino Motors, Ltd. | Back washing and regenerating apparatus for diesel particulate filter |
US5853438A (en) * | 1996-05-24 | 1998-12-29 | Hino Motors, Ltd. | Filter regenerating mechanism for exhaust black smoke removing system |
US5956946A (en) * | 1997-04-18 | 1999-09-28 | Yamada Corporation | Vehicle exhaust-gas purifier |
US6240725B1 (en) * | 2000-01-06 | 2001-06-05 | Dominic E. Scappatura | Internal combustion engine exhaust treating apparatus and method |
US6989045B2 (en) * | 2002-04-12 | 2006-01-24 | Illinois Valley Holding Co. | Apparatus and method for filtering particulate and reducing NOx emissions |
US7025811B2 (en) * | 2002-08-23 | 2006-04-11 | Cleaire Advanced Emission Controls | Apparatus for cleaning a diesel particulate filter with multiple filtration stages |
-
2006
- 2006-05-08 US US11/382,103 patent/US7296402B1/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5725618A (en) * | 1995-10-16 | 1998-03-10 | Hino Motors, Ltd. | Back washing and regenerating apparatus for diesel particulate filter |
US5853438A (en) * | 1996-05-24 | 1998-12-29 | Hino Motors, Ltd. | Filter regenerating mechanism for exhaust black smoke removing system |
US5956946A (en) * | 1997-04-18 | 1999-09-28 | Yamada Corporation | Vehicle exhaust-gas purifier |
US6240725B1 (en) * | 2000-01-06 | 2001-06-05 | Dominic E. Scappatura | Internal combustion engine exhaust treating apparatus and method |
US6989045B2 (en) * | 2002-04-12 | 2006-01-24 | Illinois Valley Holding Co. | Apparatus and method for filtering particulate and reducing NOx emissions |
US7025811B2 (en) * | 2002-08-23 | 2006-04-11 | Cleaire Advanced Emission Controls | Apparatus for cleaning a diesel particulate filter with multiple filtration stages |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104040124A (en) * | 2012-01-03 | 2014-09-10 | 沃尔沃拉斯特瓦格纳公司 | Method and arrangement for cleaning a particle filter |
JP2015503702A (en) * | 2012-01-03 | 2015-02-02 | ボルボ ラストバグナー アーベー | Method and arrangement for cleaning particle filters |
US9422845B2 (en) | 2012-01-03 | 2016-08-23 | Volvo Lastvagnar Ab | Method and arrangement for cleaning a particle filter |
US20160312675A1 (en) * | 2015-04-23 | 2016-10-27 | Cummins Emission Solutions, Inc. | Component performance recovery via inlet and outlet swap |
US10301988B2 (en) * | 2015-04-23 | 2019-05-28 | Cummins Emission Solutions, Inc. | Component performance recovery via inlet and outlet swap |
US11867112B1 (en) | 2023-03-07 | 2024-01-09 | International Engine Intellectual Property Company, Llc | Logic for improved delta pressure based soot estimation on low restriction particulate filters |
US11994056B1 (en) | 2023-03-07 | 2024-05-28 | International Engine Intellectual Property Company, Llc | Logic for improved delta pressure based soot estimation on low restriction particulate filters |
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US7296402B1 (en) | 2007-11-20 |
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