US20060254260A1 - Method and apparatus for piezoelectric injection of agent into exhaust gas for use with emission abatement device - Google Patents
Method and apparatus for piezoelectric injection of agent into exhaust gas for use with emission abatement device Download PDFInfo
- Publication number
- US20060254260A1 US20060254260A1 US11/129,932 US12993205A US2006254260A1 US 20060254260 A1 US20060254260 A1 US 20060254260A1 US 12993205 A US12993205 A US 12993205A US 2006254260 A1 US2006254260 A1 US 2006254260A1
- Authority
- US
- United States
- Prior art keywords
- agent
- exhaust gas
- piezoelectric device
- step comprises
- operating
- 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.)
- Abandoned
Links
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
- F01N9/00—Electrical control of exhaust gas treating apparatus
-
- 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
- F01N3/025—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 using fuel burner or by adding fuel to exhaust
- F01N3/0253—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 using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/36—Arrangements for supply of additional fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
-
- 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
-
- 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
- Y02T10/12—Improving ICE efficiencies
-
- 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
Definitions
- the present disclosure relates generally to methods and apparatus for treatment of emissions present in exhaust gas.
- Emission abatement devices are used to treat emissions present in exhaust gas. For example, there are NOx traps, particulate filters, and selective catalytic reduction (SCR) devices. From time to time, NOx traps and particulate filters may need to be “regenerated” to purge them of emissions trapped thereby. A regenerative agent may be injected into the exhaust gas to facilitate such regeneration. In addition, there are SCR devices which operate in conjunction with an agent injected into the exhaust gas stream to facilitate removal of NOx therefrom. This application relates to enhancements in the injection of regenerative agents and other agents into the exhaust gas for use with emission abatement devices.
- SCR selective catalytic reduction
- an apparatus having an exhaust system and a piezoelectric device.
- the piezoelectric device is configured to inject an agent into the exhaust gas system for delivery of the agent to an emission abatement device of the exhaust gas system.
- the agent may be, for example, a hydrocarbon fuel for use in regeneration of a NOx trap and/or a particulate abatement device.
- the agent may be, for example, urea for use with an SCR device to remove NOx from exhaust gas.
- FIG. 1 is a simplified block diagram showing an apparatus that employs piezoelectric injection of an agent into an exhaust gas system for use with a downstream emission abatement device;
- FIG. 2 is an enlarged diagrammatic view of the piezoelectric device.
- an apparatus 10 including an piezoelectric injection system 12 .
- the piezoelectric injection system 12 has a piezoelectric device 14 configured to inject an agent into a stream of exhaust gas (“EG”) flowing through an exhaust gas line 15 of an exhaust gas system 16 extending between an internal combustion engine 17 (e.g., a diesel engine) and an emission abatement device 18 of the exhaust gas system 16 .
- EG exhaust gas
- the agent injected into the exhaust gas line 15 by use of the piezoelectric device 14 is then advanced through the line 15 to the emission abatement device 18 for use therewith as discussed in more detail below.
- Such an arrangement reduces power consumption and avoids “thermal lag” and use of supplemental injection air.
- both power consumption and thermal lag associated with such heating is avoided.
- operation of the piezoelectric device 14 provides sufficient force for injecting the agent, there is no need to use supplemental air to assist with injection of the agent.
- the piezoelectric injection system 12 includes a controller 20 for controlling operation of the piezoelectric device 14 and a pump 22 .
- the controller 20 is electrically coupled to the piezoelectric device 14 via an electrical line 24 and is electrically coupled to the pump 22 via an electrical line 26 .
- the pump 22 is operable to pump the agent from an agent supply 28 to the piezoelectric device 14 .
- the piezoelectric device 14 When operated by the controller 20 , the piezoelectric device 14 further pressurizes the agent to inject the agent into an exhaust gas passageway (not shown) extending through the line 15 and containing the emission abatement device 18 .
- the controller 20 may control operation of the piezoelectric device 14 according to a variety of schemes.
- the controller 20 may control operation of the piezoelectric device 14 according to a time-base scheme or a sensor-based scheme.
- the controller 20 may operate the piezoelectric device 14 for a predetermined period of time and cease operation of the piezoelectric device 14 for a predetermined period of time, the length of the time periods depending on such factors as the type of emission abatement device to receive the injected agent.
- the piezoelectric injection system 12 includes one or more sensors 36 for sensing one or more parameters associated with the exhaust gas stream.
- Each sensor 36 is electrically coupled to the controller 20 via an electrical line 38 to provide information indicative of the sensed parameter to the controller 20 .
- the sensor(s) 36 may include a NOx sensor upstream and/or downstream from the emission abatement device 18 . This may be particularly useful when the emission abatement device 18 includes a NOx trap, an SCR device, and/or other NOx abatement device.
- the sensor(s) 36 may include one or more pressure sensors to detect a pressure drop across the emission abatement device 18 or other pressure(s) upstream and/or downstream from the emission abatement device 18 . This may be particularly useful when the emission abatement device 18 includes a particulate abatement device and/or a NOx trap.
- the piezoelectric device 14 includes one or more piezoelectric crystals 30 mounted in a housing 32 and electrically coupled to the controller 20 via the electrical line 24 .
- Each crystal 30 is positioned in an agent supply passageway 34 defined at least in part by the housing 32 and extending between the agent supply 28 and the exhaust gas line 15 .
- Each crystal 30 is configured to vibrate so as to expand and contract (as indicated by outwardly bowed dashed lines in FIG. 2 ) in response to application of an electrical current from the electrical line 24 .
- Crystal expansion provides the injection force for injecting the agent.
- Crystal contraction facilitates drawing the agent into the housing 32 .
- the emission abatement device 18 may be configured in a variety of ways.
- the emission abatement device may be configured as a NOx trap, an SCR device, and/or a particulate abatement device.
- the agent is a regenerative agent such as hydrocarbon fuel (e.g., diesel fuel) for regenerating the NOx trap.
- hydrocarbon fuel e.g., diesel fuel
- the controller 20 operates the piezoelectric device 14 from time to time (e.g., every 60 seconds) to inject into the exhaust gas line 15 hydrocarbon fuel supplied by the agent supply 28 .
- the injected hydrocarbon fuel is then advanced to the NOx trap to regenerate the NOx trap.
- the agent is urea which the SCR device uses to reduce NOx present in the exhaust gas stream.
- the controller 20 operates the piezoelectric device 14 to inject into the exhaust gas line 15 urea supplied by the agent supply 28 .
- the injected urea is then advanced to the SCR device for reduction of NOx. In this way, urea can be injected almost continuously at varying rates as needed to achieve continuous reduction of NOx.
- the agent is a regenerative agent such as hydrocarbon fuel (e.g., diesel fuel) for regenerating a particulate filter of the particulate abatement device (e.g., a diesel particulate filter or “DPF”).
- hydrocarbon fuel e.g., diesel fuel
- DPF diesel particulate filter
- the controller 20 operates the piezoelectric device 14 from time to time to inject into exhaust gas line 15 hydrocarbon fuel supplied by the agent supply 28 .
- the injected fuel is then advanced to the particulate abatement device where another component of the particulate abatement device oxidizes the fuel to create an exotherm that heats the particulate filter to burn particulate matter trapped thereby.
- the additional component may take a variety of forms.
- it may be an oxidation catalyst (e.g., diesel oxidation catalyst or “DOC”) upstream from the particulate filter.
- DOC diesel oxidation catalyst
- it may be the NOx trap portion of an integrated Diesel Particulate-NOx Reduction device (i.e., a “DPNR device”).
- DPNR device integrated Diesel Particulate-NOx Reduction device
- it may be a separate NOx trap upstream from the particulate filter.
Abstract
An apparatus comprises an exhaust gas system and a piezoelectric device. The piezoelectric device is configured to inject an agent into the exhaust gas system for delivery to an emission abatement device of the exhaust gas system. An associated method is disclosed.
Description
- The present disclosure relates generally to methods and apparatus for treatment of emissions present in exhaust gas.
- Emission abatement devices are used to treat emissions present in exhaust gas. For example, there are NOx traps, particulate filters, and selective catalytic reduction (SCR) devices. From time to time, NOx traps and particulate filters may need to be “regenerated” to purge them of emissions trapped thereby. A regenerative agent may be injected into the exhaust gas to facilitate such regeneration. In addition, there are SCR devices which operate in conjunction with an agent injected into the exhaust gas stream to facilitate removal of NOx therefrom. This application relates to enhancements in the injection of regenerative agents and other agents into the exhaust gas for use with emission abatement devices.
- According to an aspect of the present disclosure, there is provided an apparatus having an exhaust system and a piezoelectric device. The piezoelectric device is configured to inject an agent into the exhaust gas system for delivery of the agent to an emission abatement device of the exhaust gas system. The agent may be, for example, a hydrocarbon fuel for use in regeneration of a NOx trap and/or a particulate abatement device. In other cases, the agent may be, for example, urea for use with an SCR device to remove NOx from exhaust gas. An associated method is disclosed.
- The above and other features of the present disclosure will become apparent from the following description and the attached drawings.
-
FIG. 1 is a simplified block diagram showing an apparatus that employs piezoelectric injection of an agent into an exhaust gas system for use with a downstream emission abatement device; and -
FIG. 2 is an enlarged diagrammatic view of the piezoelectric device. - While the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific exemplary embodiments thereof have been shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives following within the spirit and scope of the invention as defined by the appended claims.
- Referring to
FIG. 1 , there is shown anapparatus 10 including anpiezoelectric injection system 12. Thepiezoelectric injection system 12 has apiezoelectric device 14 configured to inject an agent into a stream of exhaust gas (“EG”) flowing through anexhaust gas line 15 of anexhaust gas system 16 extending between an internal combustion engine 17 (e.g., a diesel engine) and anemission abatement device 18 of theexhaust gas system 16. The agent injected into theexhaust gas line 15 by use of thepiezoelectric device 14 is then advanced through theline 15 to theemission abatement device 18 for use therewith as discussed in more detail below. - Such an arrangement reduces power consumption and avoids “thermal lag” and use of supplemental injection air. In particular, since there is no heating of the agent to vaporization, both power consumption and thermal lag associated with such heating is avoided. In addition, since operation of the
piezoelectric device 14 provides sufficient force for injecting the agent, there is no need to use supplemental air to assist with injection of the agent. - The
piezoelectric injection system 12 includes acontroller 20 for controlling operation of thepiezoelectric device 14 and apump 22. Thecontroller 20 is electrically coupled to thepiezoelectric device 14 via anelectrical line 24 and is electrically coupled to thepump 22 via anelectrical line 26. Thepump 22 is operable to pump the agent from anagent supply 28 to thepiezoelectric device 14. When operated by thecontroller 20, thepiezoelectric device 14 further pressurizes the agent to inject the agent into an exhaust gas passageway (not shown) extending through theline 15 and containing theemission abatement device 18. - The
controller 20 may control operation of thepiezoelectric device 14 according to a variety of schemes. For example, thecontroller 20 may control operation of thepiezoelectric device 14 according to a time-base scheme or a sensor-based scheme. In the case of a time-based scheme, thecontroller 20 may operate thepiezoelectric device 14 for a predetermined period of time and cease operation of thepiezoelectric device 14 for a predetermined period of time, the length of the time periods depending on such factors as the type of emission abatement device to receive the injected agent. - In the case of a sensor-based scheme, the
piezoelectric injection system 12 includes one ormore sensors 36 for sensing one or more parameters associated with the exhaust gas stream. Eachsensor 36 is electrically coupled to thecontroller 20 via anelectrical line 38 to provide information indicative of the sensed parameter to thecontroller 20. For example, the sensor(s) 36 may include a NOx sensor upstream and/or downstream from theemission abatement device 18. This may be particularly useful when theemission abatement device 18 includes a NOx trap, an SCR device, and/or other NOx abatement device. In other examples, the sensor(s) 36 may include one or more pressure sensors to detect a pressure drop across theemission abatement device 18 or other pressure(s) upstream and/or downstream from theemission abatement device 18. This may be particularly useful when theemission abatement device 18 includes a particulate abatement device and/or a NOx trap. - Referring to
FIG. 2 , thepiezoelectric device 14 includes one or morepiezoelectric crystals 30 mounted in ahousing 32 and electrically coupled to thecontroller 20 via theelectrical line 24. Eachcrystal 30 is positioned in anagent supply passageway 34 defined at least in part by thehousing 32 and extending between theagent supply 28 and theexhaust gas line 15. Eachcrystal 30 is configured to vibrate so as to expand and contract (as indicated by outwardly bowed dashed lines inFIG. 2 ) in response to application of an electrical current from theelectrical line 24. Crystal expansion provides the injection force for injecting the agent. Crystal contraction facilitates drawing the agent into thehousing 32. - Referring back to
FIG. 1 , as alluded to above, theemission abatement device 18 may be configured in a variety of ways. For example, the emission abatement device may be configured as a NOx trap, an SCR device, and/or a particulate abatement device. - In the case where the
emission abatement device 18 is a NOx trap, the agent is a regenerative agent such as hydrocarbon fuel (e.g., diesel fuel) for regenerating the NOx trap. To regenerate the NOx trap (i.e., reduce NOx trapped thereby into N2 and other substances), thecontroller 20 operates thepiezoelectric device 14 from time to time (e.g., every 60 seconds) to inject into theexhaust gas line 15 hydrocarbon fuel supplied by theagent supply 28. The injected hydrocarbon fuel is then advanced to the NOx trap to regenerate the NOx trap. - In the case where the
emission abatement device 18 is an SCR device, the agent is urea which the SCR device uses to reduce NOx present in the exhaust gas stream. Thecontroller 20 operates thepiezoelectric device 14 to inject into theexhaust gas line 15 urea supplied by theagent supply 28. The injected urea is then advanced to the SCR device for reduction of NOx. In this way, urea can be injected almost continuously at varying rates as needed to achieve continuous reduction of NOx. - In the case where the
emission abatement device 18 is a particulate abatement device, the agent is a regenerative agent such as hydrocarbon fuel (e.g., diesel fuel) for regenerating a particulate filter of the particulate abatement device (e.g., a diesel particulate filter or “DPF”). To regenerate the particulate filter (i.e., burn particulate matter trapped thereby), thecontroller 20 operates thepiezoelectric device 14 from time to time to inject intoexhaust gas line 15 hydrocarbon fuel supplied by theagent supply 28. The injected fuel is then advanced to the particulate abatement device where another component of the particulate abatement device oxidizes the fuel to create an exotherm that heats the particulate filter to burn particulate matter trapped thereby. - The additional component may take a variety of forms. For example, it may be an oxidation catalyst (e.g., diesel oxidation catalyst or “DOC”) upstream from the particulate filter. In another implementation, it may be the NOx trap portion of an integrated Diesel Particulate-NOx Reduction device (i.e., a “DPNR device”). In yet another implementation, it may be a separate NOx trap upstream from the particulate filter.
- While the concepts of the present disclosure have been illustrated and described in detail in the drawings and foregoing description, such an illustration and description is to be considered as exemplary and not restrictive in character, it being understood that only the illustrative embodiments have been shown and described and that all changes and modifications that come within the spirit of the disclosure are desired to be protected.
- There are a plurality of advantages of the concepts of the present disclosure arising from the various features of the systems described herein. It will be noted that alternative embodiments of each of the systems of the present disclosure may not include all of the features described yet still benefit from at least some of the advantages of such features. Those of ordinary skill in the art may readily devise their own implementations of a system that incorporate one or more of the features of the present disclosure and fall within the spirit and scope of the invention as defined by the appended claims.
Claims (20)
1. A method, comprising the steps of:
operating a piezoelectric device so as to inject an agent into an exhaust gas stream, and
advancing the injected agent to an emission abatement device.
2. The method of claim 1 , wherein the operating step comprises vibrating the piezoelectric device in an agent supply passageway.
3. The method of claim 1 , wherein the operating step comprises operating a controller so as to control operation of the piezoelectric device.
4. The method of claim 1 , wherein the operating step comprises operating the piezoelectric device according to a time-based scheme.
5. The method of claim 1 , wherein the operating step comprises operating the piezoelectric device in response to sensing a parameter associated with the exhaust gas stream.
6. The method of claim 5 , wherein the sensing step comprises sensing NOx in the exhaust gas stream.
7. The method of claim 5 , wherein the sensing step comprises sensing a pressure in the exhaust gas stream.
8. The method of claim 1 , wherein:
the operating step comprises operating the piezoelectric device so as to inject hydrocarbon fuel into the exhaust gas stream, and
the advancing step comprises advancing the injected hydrocarbon fuel to the emission abatement device.
9. The method of claim 8 , wherein the advancing step comprises advancing the injected hydrocarbon fuel to a NOx trap.
10. The method of claim 8 , wherein the advancing step comprises advancing the injected hydrocarbon fuel to a particulate abatement device.
11. The method of claim 1 , wherein:
the operating step comprises operating the piezoelectric device so as to inject urea into the exhaust gas stream, and
the advancing step comprises advancing the injected urea to a selective catalytic reduction device.
12. An apparatus, comprising:
an exhaust gas system comprising an emission abatement device, and
a piezoelectric device configured to inject an agent into the exhaust gas system for delivery of the agent to the emission abatement device.
13. The apparatus of claim 12 , wherein the piezeoelectric device is positioned in an agent supply passageway to inject the agent in response to vibration of the piezoelectric device.
14. The apparatus of claim 12 , further comprising a controller electrically coupled to the piezoelectric device.
15. The apparatus of claim 14 , wherein the controller is configured to operate the piezoelectric device according to a time-based scheme.
16. The apparatus of claim 14 , further comprising a sensor fluidly coupled to the exhaust system, wherein the controller is electrically coupled to the sensor to operate the piezoelectric device in response to operation of the sensor.
17. The apparatus of claim 16 , wherein the sensor is one of a NOx sensor and a pressure sensor.
18. The apparatus of claim 11 , wherein the emission abatement device comprises a NOx trap fluidly coupled to the piezoelectric device to receive the agent injected thereby.
19. The apparatus of claim 15 , wherein the emission abatement device comprises a particulate abatement device fluidly coupled to the piezoelectric device to receive the agent injected thereby.
20. The apparatus of claim 11 , wherein the emission abatement device comprises a selective catalytic reduction device fluidly coupled to the piezoelectric device to receive the agent injected thereby.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/129,932 US20060254260A1 (en) | 2005-05-16 | 2005-05-16 | Method and apparatus for piezoelectric injection of agent into exhaust gas for use with emission abatement device |
PCT/IB2006/001184 WO2006123210A2 (en) | 2005-05-16 | 2006-05-08 | Method and apparatus for piezoelectric injection of agent into exhaust gas for use with emission abatement device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/129,932 US20060254260A1 (en) | 2005-05-16 | 2005-05-16 | Method and apparatus for piezoelectric injection of agent into exhaust gas for use with emission abatement device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060254260A1 true US20060254260A1 (en) | 2006-11-16 |
Family
ID=37076042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/129,932 Abandoned US20060254260A1 (en) | 2005-05-16 | 2005-05-16 | Method and apparatus for piezoelectric injection of agent into exhaust gas for use with emission abatement device |
Country Status (2)
Country | Link |
---|---|
US (1) | US20060254260A1 (en) |
WO (1) | WO2006123210A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090288627A1 (en) * | 2008-05-20 | 2009-11-26 | Emmett Manuel Cunningham | Catalyst delivery system and method therefor |
EP2226482A1 (en) * | 2009-03-06 | 2010-09-08 | MAN Nutzfahrzeuge AG | Method for adjusting the dosage amount of a reducing agent for selective catalytic reduction |
Citations (76)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4270936A (en) * | 1980-01-18 | 1981-06-02 | General Motors Corporation | Coiled fibrous metallic material and coating for diesel exhaust particulate trap |
US4276066A (en) * | 1980-02-25 | 1981-06-30 | General Motors Corporation | Monolith diesel exhaust filter with self-regeneration |
US4281512A (en) * | 1979-10-30 | 1981-08-04 | Phillips Petroleum Company | Apparatus for reducing non-gaseous pollutants |
US4319896A (en) * | 1979-03-15 | 1982-03-16 | Texaco Inc. | Smoke filter rejuvenation system |
US4335574A (en) * | 1980-02-15 | 1982-06-22 | Nippon Soken, Inc. | Carbon particles removing device |
US4373330A (en) * | 1981-06-29 | 1983-02-15 | General Motors Corporation | Diesel engine dual path exhaust cleaner and burner system |
US4381643A (en) * | 1981-08-03 | 1983-05-03 | General Motors Corporation | Diesel exhaust cleaner and burner system with constant burner air mixture supply |
US4432530A (en) * | 1977-12-23 | 1984-02-21 | Emhart Industries, Inc. | Mold-core rod combination for forming an injection molded plastic parison |
US4481767A (en) * | 1983-07-08 | 1984-11-13 | General Motors Corporation | Diesel exhaust cleaner and burner system with flame distributor |
US4520624A (en) * | 1983-07-15 | 1985-06-04 | Mitsubishi Jiboshia Kogyo Kabushiki Kaisha | Diesel particulate filter system |
US4573317A (en) * | 1985-03-11 | 1986-03-04 | General Motors Corporation | Diesel exhaust cleaner and regeneration burner system with indexing particulate trap |
US4651524A (en) * | 1984-12-24 | 1987-03-24 | Arvin Industries, Inc. | Exhaust processor |
US4685290A (en) * | 1984-11-19 | 1987-08-11 | Nippon Soken, Inc. | Engine control with function to eliminate minute particles in exhaust gas |
US4730455A (en) * | 1986-03-17 | 1988-03-15 | Fev Motorentechnik Gmbh & Co. Kg | Process and system for the regeneration of particulate filter traps |
US4840028A (en) * | 1987-03-20 | 1989-06-20 | Matsushita Electric Industrial Co., Ltd. | Purifier of diesel particulates in exhaust gas |
US4848083A (en) * | 1987-05-21 | 1989-07-18 | Webasto Ag Fahrzeugtechnik | Exhaust gas unit for multicylinder diesel internal combustion engines |
US4849774A (en) * | 1977-10-03 | 1989-07-18 | Canon Kabushiki Kaisha | Bubble jet recording apparatus which projects droplets of liquid through generation of bubbles in a liquid flow path by using heating means responsive to recording signals |
US4851015A (en) * | 1987-08-21 | 1989-07-25 | Donaldson Company, Inc. | Muffler apparatus with filter trap and method of use |
US4902487A (en) * | 1988-05-13 | 1990-02-20 | Johnson Matthey, Inc. | Treatment of diesel exhaust gases |
US5024054A (en) * | 1989-12-26 | 1991-06-18 | Donaldson Company, Inc. | Engine exhaust system with sequential loading of multiple filters |
US5048287A (en) * | 1988-08-15 | 1991-09-17 | Arvin Industries, Inc. | Tuned exhaust processor assembly |
US5063396A (en) * | 1989-03-14 | 1991-11-05 | Seiko Epson Corporation | Droplets jetting device |
US5063737A (en) * | 1989-10-27 | 1991-11-12 | General Motors Corporation | Particulate trap system for an internal combustion engine |
US5065574A (en) * | 1990-05-29 | 1991-11-19 | Caterpillar Inc. | Particulate trap regeneration apparatus and method |
US5094075A (en) * | 1988-11-04 | 1992-03-10 | Kloeckner-Humboldt-Deutz Ag | Particulate filter system |
US5140814A (en) * | 1990-01-25 | 1992-08-25 | Man Technologie Ag | Exhaust gas system with an particulate filter and a regenerating burner |
US5201802A (en) * | 1991-02-04 | 1993-04-13 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification system for an internal combustion engine |
US5207058A (en) * | 1990-11-16 | 1993-05-04 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine |
US5211009A (en) * | 1990-12-17 | 1993-05-18 | Kloeckner-Humboldt-Deutz Ag | Method for the regeneration of particulate-filter systems |
US5251564A (en) * | 1990-04-26 | 1993-10-12 | Rim Julius J | Combustion box exhaust filtration system and method |
US5365733A (en) * | 1990-05-28 | 1994-11-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification system for an internal combustion engine |
US5447696A (en) * | 1993-06-29 | 1995-09-05 | Toyota Jidosha Kabushiki Kaisha | Electrically heated catalytic converter system for an engine |
US5511413A (en) * | 1992-09-09 | 1996-04-30 | J. Eberspacher | Method and device for determining the load condition of particle filters |
US5646660A (en) * | 1994-08-09 | 1997-07-08 | Encad, Inc. | Printer ink cartridge with drive logic integrated circuit |
US5656048A (en) * | 1994-04-06 | 1997-08-12 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate filter cartridge and filter |
US5685145A (en) * | 1995-02-07 | 1997-11-11 | Engelhard Corporation | Method and apparatus for performance enhancement of the manifold catalyst in the automotive exhaust system |
US5711149A (en) * | 1995-05-18 | 1998-01-27 | Toyota Jidosha Kabushiki Kaisha | Device for purifying the exhaust gas of a diesel engine |
US5771683A (en) * | 1995-08-30 | 1998-06-30 | Southwest Research Institute | Active porous medium aftertreatment control system |
US5797266A (en) * | 1994-11-09 | 1998-08-25 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation Snecma | Device for actively controlling combustion instabilities and for decoking a fuel injector |
US5934069A (en) * | 1995-06-08 | 1999-08-10 | Corning Incorporated | In-line adsorber system |
US5946906A (en) * | 1996-11-20 | 1999-09-07 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust gas purification system of internal combustion engine |
US5974791A (en) * | 1997-03-04 | 1999-11-02 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for an internal combustion engine |
US5983628A (en) * | 1998-01-29 | 1999-11-16 | Chrysler Corporation | System and method for controlling exhaust gas temperatures for increasing catalyst conversion of NOx emissions |
US5983627A (en) * | 1997-09-02 | 1999-11-16 | Ford Global Technologies, Inc. | Closed loop control for desulfating a NOx trap |
US6012284A (en) * | 1997-05-21 | 2000-01-11 | Denso Corporation | Engine exhaust gas purifying system |
US6063150A (en) * | 1997-07-18 | 2000-05-16 | Rypos, Inc. | Self-cleaning and self-sealing particle filter |
US6134722A (en) * | 1994-07-13 | 2000-10-24 | Kohler Co. | Recirculating bath fixture |
US6182445B1 (en) * | 1999-02-08 | 2001-02-06 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust switch-over valve malfunction detection system of internal combustion engine |
US6233926B1 (en) * | 2000-03-01 | 2001-05-22 | Illinois Valley Holding Company | Apparatus and method for filtering particulate in an exhaust trap |
US6293096B1 (en) * | 1999-06-23 | 2001-09-25 | Southwest Research Institute | Multiple stage aftertreatment system |
US6318077B1 (en) * | 2000-03-13 | 2001-11-20 | General Motors Corporation | Integrated thermal and exhaust management unit |
US6321533B1 (en) * | 1999-05-24 | 2001-11-27 | Toyota Jidosha Kabushiki Kaisha | Exhaust passage switching unit and method for internal combustion engine |
US6327852B1 (en) * | 1999-03-19 | 2001-12-11 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas emission control apparatus of hybrid vehicle |
US6334306B1 (en) * | 1998-05-29 | 2002-01-01 | Nissan Motor Co., Ltd. | Exhaust gas purification apparatus in combustion engine |
US6347511B1 (en) * | 1999-12-21 | 2002-02-19 | Ford Global Technologies, Inc. | Exhaust gas purification system for lean burn engine |
US6357226B2 (en) * | 1998-10-22 | 2002-03-19 | Chrysler Corporation | Control system for lean air-fuel ratio NOx catalyst system |
US6422006B2 (en) * | 2000-06-27 | 2002-07-23 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust gas purifying apparatus for internal combustion engine |
US6427436B1 (en) * | 1997-08-13 | 2002-08-06 | Johnson Matthey Public Limited Company | Emissions control |
US6446430B1 (en) * | 2000-02-22 | 2002-09-10 | Engelhard Corporation | System for reducing NOx transient emission |
US6464744B2 (en) * | 2000-10-03 | 2002-10-15 | Corning Incorporated | Diesel particulate filters |
US6568179B2 (en) * | 2001-03-01 | 2003-05-27 | Engelhard Corporation | Apparatus and method for vehicle emissions control |
US6571551B2 (en) * | 1998-11-20 | 2003-06-03 | Volvo Personvagnar Ab | Heat exchanger for SOx or NOx regeneration of catalyst |
US20030116641A1 (en) * | 2001-10-02 | 2003-06-26 | Ngk Insulators, Ltd. | Liquid injection apparatus |
US20030138688A1 (en) * | 2001-12-27 | 2003-07-24 | Nobuki Hattori | Fuel cell power generation system |
US20030140621A1 (en) * | 1999-06-23 | 2003-07-31 | Southwest Research Institute | Integrated method for controlling diesel engine emissions in CRT-LNT system |
US6641944B2 (en) * | 2000-10-12 | 2003-11-04 | Nissan Motor Co., Ltd. | Fuel cell drive system |
US20030230076A1 (en) * | 2002-06-18 | 2003-12-18 | Choong-Il Kwon | Filter regeneration system for eliminating particulate matter generated in a diesel engine |
US6694727B1 (en) * | 2002-09-03 | 2004-02-24 | Arvin Technologies, Inc. | Exhaust processor |
US20040052693A1 (en) * | 2002-09-18 | 2004-03-18 | Crane Samuel N. | Apparatus and method for removing NOx from the exhaust gas of an internal combustion engine |
US20040093856A1 (en) * | 2002-11-18 | 2004-05-20 | Dingle Philip J. G. | Apparatus and method for reductant dosing of an exhaust |
US6779339B1 (en) * | 2003-05-02 | 2004-08-24 | The United States Of America As Represented By The Environmental Protection Agency | Method for NOx adsorber desulfation in a multi-path exhaust system |
US6871489B2 (en) * | 2003-04-16 | 2005-03-29 | Arvin Technologies, Inc. | Thermal management of exhaust systems |
US6934622B2 (en) * | 2003-11-04 | 2005-08-23 | Detroit Diesel Corporation | Internal combustion engine with NOx adsorber |
US7017346B2 (en) * | 2002-07-25 | 2006-03-28 | Siemens Aktiengesellschaft | Device for transmitting a displacement of an actuator using an elastomer ring |
US7040087B2 (en) * | 2002-07-02 | 2006-05-09 | Toyota Jidosha Kabushiki Kaisha | Device for purifying exhaust gas for engine |
US7051520B2 (en) * | 2003-11-05 | 2006-05-30 | Isuzu Motors Limited | Sulfur purge control method and exhaust gas purifying system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000028196A1 (en) * | 1998-11-06 | 2000-05-18 | Ceryx Incorporated | Integrated apparatus for removing pollutants from a fluid stream in a lean-burn environment with heat recovery |
DE10034880A1 (en) * | 2000-07-18 | 2002-02-07 | Siemens Ag | dosing |
-
2005
- 2005-05-16 US US11/129,932 patent/US20060254260A1/en not_active Abandoned
-
2006
- 2006-05-08 WO PCT/IB2006/001184 patent/WO2006123210A2/en active Application Filing
Patent Citations (76)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4849774A (en) * | 1977-10-03 | 1989-07-18 | Canon Kabushiki Kaisha | Bubble jet recording apparatus which projects droplets of liquid through generation of bubbles in a liquid flow path by using heating means responsive to recording signals |
US4432530A (en) * | 1977-12-23 | 1984-02-21 | Emhart Industries, Inc. | Mold-core rod combination for forming an injection molded plastic parison |
US4319896A (en) * | 1979-03-15 | 1982-03-16 | Texaco Inc. | Smoke filter rejuvenation system |
US4281512A (en) * | 1979-10-30 | 1981-08-04 | Phillips Petroleum Company | Apparatus for reducing non-gaseous pollutants |
US4270936A (en) * | 1980-01-18 | 1981-06-02 | General Motors Corporation | Coiled fibrous metallic material and coating for diesel exhaust particulate trap |
US4335574A (en) * | 1980-02-15 | 1982-06-22 | Nippon Soken, Inc. | Carbon particles removing device |
US4276066A (en) * | 1980-02-25 | 1981-06-30 | General Motors Corporation | Monolith diesel exhaust filter with self-regeneration |
US4373330A (en) * | 1981-06-29 | 1983-02-15 | General Motors Corporation | Diesel engine dual path exhaust cleaner and burner system |
US4381643A (en) * | 1981-08-03 | 1983-05-03 | General Motors Corporation | Diesel exhaust cleaner and burner system with constant burner air mixture supply |
US4481767A (en) * | 1983-07-08 | 1984-11-13 | General Motors Corporation | Diesel exhaust cleaner and burner system with flame distributor |
US4520624A (en) * | 1983-07-15 | 1985-06-04 | Mitsubishi Jiboshia Kogyo Kabushiki Kaisha | Diesel particulate filter system |
US4685290A (en) * | 1984-11-19 | 1987-08-11 | Nippon Soken, Inc. | Engine control with function to eliminate minute particles in exhaust gas |
US4651524A (en) * | 1984-12-24 | 1987-03-24 | Arvin Industries, Inc. | Exhaust processor |
US4573317A (en) * | 1985-03-11 | 1986-03-04 | General Motors Corporation | Diesel exhaust cleaner and regeneration burner system with indexing particulate trap |
US4730455A (en) * | 1986-03-17 | 1988-03-15 | Fev Motorentechnik Gmbh & Co. Kg | Process and system for the regeneration of particulate filter traps |
US4840028A (en) * | 1987-03-20 | 1989-06-20 | Matsushita Electric Industrial Co., Ltd. | Purifier of diesel particulates in exhaust gas |
US4848083A (en) * | 1987-05-21 | 1989-07-18 | Webasto Ag Fahrzeugtechnik | Exhaust gas unit for multicylinder diesel internal combustion engines |
US4851015A (en) * | 1987-08-21 | 1989-07-25 | Donaldson Company, Inc. | Muffler apparatus with filter trap and method of use |
US4902487A (en) * | 1988-05-13 | 1990-02-20 | Johnson Matthey, Inc. | Treatment of diesel exhaust gases |
US5048287A (en) * | 1988-08-15 | 1991-09-17 | Arvin Industries, Inc. | Tuned exhaust processor assembly |
US5094075A (en) * | 1988-11-04 | 1992-03-10 | Kloeckner-Humboldt-Deutz Ag | Particulate filter system |
US5063396A (en) * | 1989-03-14 | 1991-11-05 | Seiko Epson Corporation | Droplets jetting device |
US5063737A (en) * | 1989-10-27 | 1991-11-12 | General Motors Corporation | Particulate trap system for an internal combustion engine |
US5024054A (en) * | 1989-12-26 | 1991-06-18 | Donaldson Company, Inc. | Engine exhaust system with sequential loading of multiple filters |
US5140814A (en) * | 1990-01-25 | 1992-08-25 | Man Technologie Ag | Exhaust gas system with an particulate filter and a regenerating burner |
US5251564A (en) * | 1990-04-26 | 1993-10-12 | Rim Julius J | Combustion box exhaust filtration system and method |
US5365733A (en) * | 1990-05-28 | 1994-11-22 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification system for an internal combustion engine |
US5065574A (en) * | 1990-05-29 | 1991-11-19 | Caterpillar Inc. | Particulate trap regeneration apparatus and method |
US5207058A (en) * | 1990-11-16 | 1993-05-04 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine |
US5211009A (en) * | 1990-12-17 | 1993-05-18 | Kloeckner-Humboldt-Deutz Ag | Method for the regeneration of particulate-filter systems |
US5201802A (en) * | 1991-02-04 | 1993-04-13 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification system for an internal combustion engine |
US5511413A (en) * | 1992-09-09 | 1996-04-30 | J. Eberspacher | Method and device for determining the load condition of particle filters |
US5447696A (en) * | 1993-06-29 | 1995-09-05 | Toyota Jidosha Kabushiki Kaisha | Electrically heated catalytic converter system for an engine |
US5656048A (en) * | 1994-04-06 | 1997-08-12 | Minnesota Mining And Manufacturing Company | Electrically regenerable diesel particulate filter cartridge and filter |
US6134722A (en) * | 1994-07-13 | 2000-10-24 | Kohler Co. | Recirculating bath fixture |
US5646660A (en) * | 1994-08-09 | 1997-07-08 | Encad, Inc. | Printer ink cartridge with drive logic integrated circuit |
US5797266A (en) * | 1994-11-09 | 1998-08-25 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation Snecma | Device for actively controlling combustion instabilities and for decoking a fuel injector |
US5685145A (en) * | 1995-02-07 | 1997-11-11 | Engelhard Corporation | Method and apparatus for performance enhancement of the manifold catalyst in the automotive exhaust system |
US5711149A (en) * | 1995-05-18 | 1998-01-27 | Toyota Jidosha Kabushiki Kaisha | Device for purifying the exhaust gas of a diesel engine |
US5934069A (en) * | 1995-06-08 | 1999-08-10 | Corning Incorporated | In-line adsorber system |
US5771683A (en) * | 1995-08-30 | 1998-06-30 | Southwest Research Institute | Active porous medium aftertreatment control system |
US5946906A (en) * | 1996-11-20 | 1999-09-07 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust gas purification system of internal combustion engine |
US5974791A (en) * | 1997-03-04 | 1999-11-02 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification device for an internal combustion engine |
US6012284A (en) * | 1997-05-21 | 2000-01-11 | Denso Corporation | Engine exhaust gas purifying system |
US6063150A (en) * | 1997-07-18 | 2000-05-16 | Rypos, Inc. | Self-cleaning and self-sealing particle filter |
US6427436B1 (en) * | 1997-08-13 | 2002-08-06 | Johnson Matthey Public Limited Company | Emissions control |
US5983627A (en) * | 1997-09-02 | 1999-11-16 | Ford Global Technologies, Inc. | Closed loop control for desulfating a NOx trap |
US5983628A (en) * | 1998-01-29 | 1999-11-16 | Chrysler Corporation | System and method for controlling exhaust gas temperatures for increasing catalyst conversion of NOx emissions |
US6334306B1 (en) * | 1998-05-29 | 2002-01-01 | Nissan Motor Co., Ltd. | Exhaust gas purification apparatus in combustion engine |
US6357226B2 (en) * | 1998-10-22 | 2002-03-19 | Chrysler Corporation | Control system for lean air-fuel ratio NOx catalyst system |
US6571551B2 (en) * | 1998-11-20 | 2003-06-03 | Volvo Personvagnar Ab | Heat exchanger for SOx or NOx regeneration of catalyst |
US6182445B1 (en) * | 1999-02-08 | 2001-02-06 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust switch-over valve malfunction detection system of internal combustion engine |
US6327852B1 (en) * | 1999-03-19 | 2001-12-11 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas emission control apparatus of hybrid vehicle |
US6321533B1 (en) * | 1999-05-24 | 2001-11-27 | Toyota Jidosha Kabushiki Kaisha | Exhaust passage switching unit and method for internal combustion engine |
US6293096B1 (en) * | 1999-06-23 | 2001-09-25 | Southwest Research Institute | Multiple stage aftertreatment system |
US20030140621A1 (en) * | 1999-06-23 | 2003-07-31 | Southwest Research Institute | Integrated method for controlling diesel engine emissions in CRT-LNT system |
US6347511B1 (en) * | 1999-12-21 | 2002-02-19 | Ford Global Technologies, Inc. | Exhaust gas purification system for lean burn engine |
US6446430B1 (en) * | 2000-02-22 | 2002-09-10 | Engelhard Corporation | System for reducing NOx transient emission |
US6233926B1 (en) * | 2000-03-01 | 2001-05-22 | Illinois Valley Holding Company | Apparatus and method for filtering particulate in an exhaust trap |
US6318077B1 (en) * | 2000-03-13 | 2001-11-20 | General Motors Corporation | Integrated thermal and exhaust management unit |
US6422006B2 (en) * | 2000-06-27 | 2002-07-23 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust gas purifying apparatus for internal combustion engine |
US6464744B2 (en) * | 2000-10-03 | 2002-10-15 | Corning Incorporated | Diesel particulate filters |
US6641944B2 (en) * | 2000-10-12 | 2003-11-04 | Nissan Motor Co., Ltd. | Fuel cell drive system |
US6568179B2 (en) * | 2001-03-01 | 2003-05-27 | Engelhard Corporation | Apparatus and method for vehicle emissions control |
US20030116641A1 (en) * | 2001-10-02 | 2003-06-26 | Ngk Insulators, Ltd. | Liquid injection apparatus |
US20030138688A1 (en) * | 2001-12-27 | 2003-07-24 | Nobuki Hattori | Fuel cell power generation system |
US20030230076A1 (en) * | 2002-06-18 | 2003-12-18 | Choong-Il Kwon | Filter regeneration system for eliminating particulate matter generated in a diesel engine |
US7040087B2 (en) * | 2002-07-02 | 2006-05-09 | Toyota Jidosha Kabushiki Kaisha | Device for purifying exhaust gas for engine |
US7017346B2 (en) * | 2002-07-25 | 2006-03-28 | Siemens Aktiengesellschaft | Device for transmitting a displacement of an actuator using an elastomer ring |
US6694727B1 (en) * | 2002-09-03 | 2004-02-24 | Arvin Technologies, Inc. | Exhaust processor |
US20040052693A1 (en) * | 2002-09-18 | 2004-03-18 | Crane Samuel N. | Apparatus and method for removing NOx from the exhaust gas of an internal combustion engine |
US20040093856A1 (en) * | 2002-11-18 | 2004-05-20 | Dingle Philip J. G. | Apparatus and method for reductant dosing of an exhaust |
US6871489B2 (en) * | 2003-04-16 | 2005-03-29 | Arvin Technologies, Inc. | Thermal management of exhaust systems |
US6779339B1 (en) * | 2003-05-02 | 2004-08-24 | The United States Of America As Represented By The Environmental Protection Agency | Method for NOx adsorber desulfation in a multi-path exhaust system |
US6934622B2 (en) * | 2003-11-04 | 2005-08-23 | Detroit Diesel Corporation | Internal combustion engine with NOx adsorber |
US7051520B2 (en) * | 2003-11-05 | 2006-05-30 | Isuzu Motors Limited | Sulfur purge control method and exhaust gas purifying system |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090288627A1 (en) * | 2008-05-20 | 2009-11-26 | Emmett Manuel Cunningham | Catalyst delivery system and method therefor |
US7828225B2 (en) | 2008-05-20 | 2010-11-09 | Emmett Manuel Cunningham | Catalyst delivery system and method therefor |
EP2226482A1 (en) * | 2009-03-06 | 2010-09-08 | MAN Nutzfahrzeuge AG | Method for adjusting the dosage amount of a reducing agent for selective catalytic reduction |
US20100223907A1 (en) * | 2009-03-06 | 2010-09-09 | Man Nutzfahrzeuge Ag | Method For Adjusting the Metered Quantity of Reducing Agent For Selective Catalytic Reduction |
US8341944B2 (en) | 2009-03-06 | 2013-01-01 | Man Nutzfahzeuge Ag | Method for adjusting the metered quantity of reducing agent for selective catalytic reduction |
Also Published As
Publication number | Publication date |
---|---|
WO2006123210A2 (en) | 2006-11-23 |
WO2006123210A3 (en) | 2007-01-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8365517B2 (en) | Apparatus and method for regenerating an exhaust filter | |
JP4702318B2 (en) | Exhaust gas purification system for internal combustion engine | |
JP5087188B2 (en) | Exhaust purification system and control method of exhaust purification system | |
EP2184460B1 (en) | Exhaust gas purification apparatus for internal combustion engine | |
JP4521824B2 (en) | Exhaust purification device | |
US8756917B2 (en) | Control apparatus for temperature excursions within an exhaust gas treatment system | |
JP4935983B2 (en) | Exhaust gas purification device for internal combustion engine | |
JP5383615B2 (en) | Warming up the aftertreatment burner system | |
US9562452B2 (en) | System and method for controlling regeneration within an after-treatment component of a compression-ignition engine | |
JP4174685B1 (en) | Exhaust gas purification device for internal combustion engine | |
JP5653208B2 (en) | Reducing agent supply device and control method thereof | |
JP5251711B2 (en) | Exhaust gas purification device for internal combustion engine | |
EP2153034B1 (en) | Exhaust gas purification system for an internal combustion engine | |
US7332142B2 (en) | Method and apparatus for bubble injection of agent into exhaust gas for use with emission abatement device | |
US8864875B2 (en) | Regeneration of a particulate filter based on a particulate matter oxidation rate | |
JP2007002697A (en) | Exhaust emission control device | |
JP5071341B2 (en) | Engine exhaust purification system | |
JP2008196375A (en) | Exhaust emission control device of internal combustion engine | |
US20060254260A1 (en) | Method and apparatus for piezoelectric injection of agent into exhaust gas for use with emission abatement device | |
US20130086886A1 (en) | Electrically heated oxidation catalyst particulate matter protection | |
JP4328949B2 (en) | Exhaust gas purification device for internal combustion engine | |
JP5698525B2 (en) | Exhaust purification system and control method of exhaust purification system | |
CN104564272A (en) | Control of regeneration in diesel after-treatment system | |
JP2006274980A (en) | Exhaust emission control device | |
JP2013092075A (en) | Exhaust emission control device of internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ARVINMERITOR EMISSIONS TECHNOLOGIES GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TELFORD, CLIVE D.;REEL/FRAME:016572/0425 Effective date: 20050429 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |