US20050193724A1 - Oxygen-enriched feedgas for reformer in emissions control system - Google Patents

Oxygen-enriched feedgas for reformer in emissions control system Download PDF

Info

Publication number
US20050193724A1
US20050193724A1 US11/067,815 US6781505A US2005193724A1 US 20050193724 A1 US20050193724 A1 US 20050193724A1 US 6781505 A US6781505 A US 6781505A US 2005193724 A1 US2005193724 A1 US 2005193724A1
Authority
US
United States
Prior art keywords
exhaust
reformer
air
bypass line
line
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
Application number
US11/067,815
Inventor
Cynthia Webb
Joseph Anthony
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest Research Institute SwRI
Original Assignee
Southwest Research Institute SwRI
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US54835404P priority Critical
Application filed by Southwest Research Institute SwRI filed Critical Southwest Research Institute SwRI
Priority to US11/067,815 priority patent/US20050193724A1/en
Assigned to SOUTHWEST RESEARCH INSTITUTE reassignment SOUTHWEST RESEARCH INSTITUTE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ANTHONY, JOSEPH W., WEBB, CYNTHIA C.
Publication of US20050193724A1 publication Critical patent/US20050193724A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842Nitrogen oxides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871Regulation of absorbents or adsorbents, e.g. purging
    • F01N3/0878Bypassing absorbents or adsorbents
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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
    • F01N3/22Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/24Exhaust 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
    • F01N3/30Arrangements for supply of additional air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00Electrical control of exhaust gas treating apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08Other arrangements or adaptations of exhaust conduits
    • F01N13/10Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F01N13/107More than one exhaust manifold or exhaust collector
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/30Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel reformer
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2560/00Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/025Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems

Abstract

A method and systems for supplying oxygen-enriched feedgas to a reformer. The reformer is placed on an exhaust bypass line, which has a valve upstream the reformer, for opening and closing the flow of exhaust gas into the bypass line. The bypass line receives atmospheric air at a venturi, and this air is mixed with the exhaust gas to supply feedgas to the reformer. The output of the reformer is directed via the bypass line to a point on a main exhaust line upstream an emissions control device, such as a NAC.

Description

    RELATED PATENT APPLICATION
  • This application claims the benefit of U.S. Provisional Application No. 60/548,354, filed Feb. 27, 2004 and entitled “Oxygen-Enriched Feedgas for Reformer in NOx Adsorber Emissions System”.
  • TECHNICAL FIELD OF THE INVENTION
  • This invention relates to reducing exhaust emissions from internal combustion engines, and more particularly to providing oxygen-enriched feedgas for an exhaust gas reformer used upstream of an emissions control device, such as a lean NOx catalyst.
  • BACKGROUND OF THE INVENTION
  • Internal combustion engines are a major contributor to harmful emissions. Internal combustion engines dominate land transportation propulsion—cars, trucks, off-highway vehicles, railroad, marine, motorcycles—as well as provide mechanical and electrical power for a wide range of large and small applications. The two dominant types of internal combustion engines are spark-ignition and diesel. The amount and composition of the emissions exhausted from these engines depend on the details of the processes that occur within the engine during operation, the characteristics of the fuel used, and the type of emissions control system used.
  • For diesel engines, the main pollutants of concern are nitrogen oxides (NOx) and particulate matter (PM). The latter is composed of black smoke (soot), sulfates generated by the sulfur in fuel, and organic components of unburned fuel and lubricating oil.
  • In-cylinder design changes have had some success in reducing emissions, but have fallen short of allowing diesel engines to meet today's emissions limits. Post-combustion treatment systems often include catalysts and particulate filters for reducing NOx and PM respectively. Technology advances in the catalyst field have made it possible for integrated systems of engine and exhaust treatment to achieve extremely low emissions. Yet, more emission reduction efficiencies are sought from existing systems and new catalytic reduction solutions are needed to achieve even lower emissions.
  • Indications are that diesel oxidation catalyst performance improves with increased engine speed, airflow, and hence oxygen content. For particulate filters, both oxygen content and exhaust gas temperature their regeneration.
  • On the other hand, for regeneration of modern NOx reduction catalysts such as the lean NOx trap (NOx adsorber catalyst), reduced oxygen content in the exhaust is desirable. Normally in diesel exhaust, attempts are made to reduce oxygen to regenerate the system from its stored nitrogen compounds. Attempts to reduce exhaust oxygen content are usually combined with increasing exhaust hydrocarbon to obtain the rich mixture needed for the NOx regeneration process.
  • It is customary in diesel NOx adsorber technology to place a diesel oxidation catalyst upstream from the lean NOx trap. Its purpose is to condition the exhaust hydrocarbon or reform it to obtain the ideal reductant for the lean NOx trap regeneration.
  • Having established the need for controlling the composition of the reductant, some companies have announced plans for using onboard fuel reformers to accomplish their needs. Onboard fuel reformers involve some kind of catalyst that is provided with a supply of fuel and a supply of air. Providing a continuous but controllable supply of fuel has not been a significant obstacle. However, providing a suitable supply of air to the reformer has been challenging.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • A more complete understanding of the present embodiments and advantages thereof may be acquired by referring to the following description taken in conjunction with the accompanying drawings, in which like reference numbers indicate like features, and wherein:
  • FIG. 1 illustrates a first embodiment of the invention; and
  • FIG. 2 illustrates a second embodiment of the invention.
  • DETAILED DESCRIPTION OF THE INVENTION
  • The following description is directed to an engine-based means and method, used in conjunction with a diesel emissions control system, for supplying an exhaust reformer with a source of air. The air enriches the feedgas to the reformer, which generates a reformate. In the example of this description, the enriched feedgas is used by the reformer to provide a reductant during regeneration of a NOx adsorbtion catalyst (NAC).
  • FIG. 1 illustrates a method and system for supplying air to a reformer 101 in accordance with the invention. Reformer 101 is part of an emissions control system 100, which also has at least one emissions control device 102 that has cause to use feedgas from reformer 101. In the example of this description, the emissions control device 102 is a NAC (NOx adsorber catalyst) sometimes also referred to as an LNT (lean NOx trap).
  • Engine 103 is a diesel engine, and in the example of this description, is a dual bank engine. It is equipped with an air-charging device 104, such as a turbocharger. In the example of this description, turbocharger 104 is a VNT (variable nozzle turbocharger).
  • The method is particularly useful for supplying oxygen-enriched feedgas to reformer 101 under low flow and/or low load engine operating conditions. Under such conditions, fresh air from a boosted source (such as turbocharger 104) is low or unavailable.
  • As illustrated, NAC 102 is mounted along the engine exhaust pipe. NAC 102 is essentially a storage device for NOx contained in the exhaust gas. It has two principal elements: a NOx adsorbent and a three-way conversion catalyst. NAC 102 has three primary functions: conversion of NO to NO2, adsorption of NO2, and release and reduction of NO2 during regeneration of the NAC 102.
  • As stated in the Background, regeneration of NAC 102 is performed under rich exhaust gas conditions. Under such conditions, the stored NOx is released from the adsorbent and simultaneously reduced to N2 (and/or N2O or NH3) over precious metal sites.
  • Reformer 101 is placed on an exhaust bypass 105. As explained below, the purpose of reformer 101 is to supply reductant for regeneration of the NAC 102. Reformer 101 typically has a catalyst, and is provided with a supply of fuel and a supply of air. A supply line (not shown) may be used to supply fuel or any other liquid or gas consumed by the reformer.
  • In the example of this description, where engine 103 is a dual-bank engine, exhaust bypass 105 is routed off one side of the exhaust manifold, prior to turbocharger 104. For an in-line engine, the bypass would be installed upstream of the turbocharger. Bypass 105 joins the main exhaust pipe upstream the NAC 102
  • Exhaust bypass 105 is normally closed, using valve 107. When flow through reformer 101 is desired, and exhaust flow conditions are low, valve 107 blocking the exhaust bypass 105 is opened.
  • At the same time, the turbocharger 104 is operated to as to obstruct exhaust flow from the turbocharger. For example, the turbine vanes may be closed. Essentially, while exhaust gas is flowing through bypass 105, turbocharger 104 is used to put backpressure on the exhaust flow. If the turbocharger 104 does not sufficiently obstruct exhaust flow, an optional exhaust valve 106 may be closed to increase the flow through the exhaust bypass 105.
  • Flow through exhaust bypass 105 may be metered by using a metering valve for valve 107. An example of a suitable valve is an EGR (exhaust gas recirculation) metering valve. A venturi 108 is placed downstream valve 107.
  • A fresh air line 109 is plumbed to the center of venturi 108, which pulls air in. During low flow conditions, the air into venturi 108 is not necessarily charged; charged air is not required for operation of the invention. However, in various embodiments of the invention, charged air may be available and used.
  • In the example of FIG. 1, fresh air line 109 is routed through the compressor side of turbocharger 104. This permits fresh air line 109 to receive charged air from turbocharger 104 if available and desired. As explained below in connection with FIG. 2, in other embodiments, fresh air line 109 may be routed directly from atmosphere.
  • The fresh air entering exhaust bypass 105 at venturi 108 provides oxygen-enrichment of the exhaust, which already has a high oxygen content at low load and idle. Under these conditions, the exhaust prior to enrichment already typically has more than 15% oxygen.
  • The oxygen-enriched gas mixture is then supplied to reformer 101. An example of a suitable reformer 101, is a fuel-based reformer, which burns diesel fuel, and makes the exhaust gas fuel-rich, to be used for regeneration of NAC 102.
  • Optionally, a small diesel particulate filter 110 can be placed at the entrance to exhaust bypass 105, to clean the exhaust gas. The filter 110 may be placed anywhere upstream reformer 101.
  • Various sensors, such as mass airflow (MAF) sensor 111 and/or an oxygen sensor 112 can be used to determine an oxygen mass flow rate. This measurement is especially useful for closed-loop control of fuel to the reformer 101. A metering valve 113 may be used to control the amount of oxygen received at venturi 108.
  • A controller 120 can be used to receive measurements from various sensors, such as sensors 111 and 112. Controller 120 would deliver control signals to various valves, such as valves 107, 106, and 113. Controller 120 would be programmed to perform the method described above, and wherein the emissions control device 102 is a NAC, would be programmed to provide oxygen-enriched feedgas via the bypass line 105 during regeneration of NAC.
  • FIG. 2 illustrates a second embodiment of the invention, in which fresh air line 209 is routed directly to atmosphere, rather than being routed through the compressor side of turbocharger 204. The embodiment of FIG. 2 operates in the same manner as the embodiment of FIG. 1, being particularly designed for use during low-flow/low-load conditions. It is conceivable that engine 203 may lack a turbocharger or other air-charging device, in which case the above-described method is operable independently of such devices.

Claims (20)

1. A method, for use in a diesel engine having an air-charging device, of providing a reformate to an emissions control device on an exhaust line, comprising:
using a bypass line to carry exhaust gas from the engine to a point on the exhaust line upstream the emissions control device;
opening a valve on the bypass line upstream the reformer;
directing atmospheric air to a venturi in the bypass line, upstream the reformer;
receiving the air and exhaust into the reformer;
using the reformer to generate the reductant; and
routing the reductant, via the bypass line, to the point on the exhaust line upstream the emissions control device.
2. The method of claim 1, further comprising the step of closing the exhaust flow from the air-charging device.
3. The method of claim 1, further comprising the step of using a valve to decrease or stop the flow of exhaust through the exhaust line.
4. The method of claim 1, further comprising the step of using backpressure of the air-charging device to boost flow to the reformer.
5. The method of claim 1, wherein the emissions control device is a NOx adsorption catalyst (NAC), and wherein the method operates during regeneration of the NAC.
6. The method of claim 1, further providing the step of using a sensor to detect the oxygen provided to the reformer.
7. The method of claim 1, wherein the method is used with closed loop control hardware for control of oxygen to the reformer.
8. The method of claim 1, wherein the bypass line begins at a point between the exhaust manifold and the air-charging device.
9. The method of claim 1, wherein the atmospheric air is routed from the air output side of the air-charging device.
10. The method of claim 1, wherein the atmospheric air is routed directed directly from atmosphere.
11. An exhaust system for a diesel engine having an air-charging device, comprising:
an exhaust line for carrying exhaust gas from the engine to atmosphere;
at least one emissions control device on the exhaust line;
a bypass line to carry exhaust gas from the engine to a point on the exhaust line upstream the emissions control device;
a reformer on the bypass line;
a valve on the bypass line upstream the reformer, for opening and closing the flow of exhaust gas from the engine into the bypass line;
a venturi in the bypass line, upstream the reformer; and
an air inlet for receiving air into the bypass line at the venturi;
wherein the air inlet receives air from the air-charging device.
12. The system of claim 11, further comprising a valve for closing the flow of exhaust into the exhaust line.
13. A method, for use in a diesel engine, of providing a reformate to an emissions control device on an exhaust line, comprising:
using a bypass line to carry exhaust gas from the exhaust manifold of the engine to a point on the exhaust line upstream the emissions control device;
opening a valve on the bypass line upstream the reformer;
directing atmospheric air to a venturi in the bypass line, upstream the reformer;
receiving the air and exhaust into the reformer;
using the reformer to generate the reformate; and
routing the reformate, via the bypass line, to the point on the exhaust line upstream the emissions control device.
14. The method of claim 13, further comprising the step of using a valve to decrease or stop the flow of exhaust through the exhaust line.
15. The method of claim 13, wherein the emissions control device is a NOx adsorption catalyst (NAC), and wherein the method operates during regeneration of the NAC.
16. The method of claim 13, further providing the step of using a sensor to detect the oxygen provided to the reformer.
17. The method of claim 13, wherein the method is used with closed loop control hardware for control of oxygen to the reformer.
18. An exhaust system for a diesel engine, comprising:
an exhaust line for carrying exhaust gas from the engine to atmosphere;
at least one emissions control device on the exhaust line;
a bypass line to carry exhaust gas from the engine to a point on the exhaust line upstream the emissions control device;
a reformer on the bypass line;
a valve on the bypass line upstream the reformer for opening and closing the flow of exhaust gas from the engine into the bypass line;
a venturi in the bypass line, upstream the reformer; and
an air inlet for receiving air into the bypass line at the venturi.
19. The system of claim 18, wherein the emissions control device is a NOx adsorber catalyst (NAC).
20. The system of claim 18, further comprising a valve for closing the flow of exhaust into the exhaust line.
US11/067,815 2004-02-27 2005-02-28 Oxygen-enriched feedgas for reformer in emissions control system Abandoned US20050193724A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US54835404P true 2004-02-27 2004-02-27
US11/067,815 US20050193724A1 (en) 2004-02-27 2005-02-28 Oxygen-enriched feedgas for reformer in emissions control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/067,815 US20050193724A1 (en) 2004-02-27 2005-02-28 Oxygen-enriched feedgas for reformer in emissions control system

Publications (1)

Publication Number Publication Date
US20050193724A1 true US20050193724A1 (en) 2005-09-08

Family

ID=34915001

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/067,815 Abandoned US20050193724A1 (en) 2004-02-27 2005-02-28 Oxygen-enriched feedgas for reformer in emissions control system

Country Status (1)

Country Link
US (1) US20050193724A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060048502A1 (en) * 2004-07-29 2006-03-09 Washington Kirk B Integrated system for reducing fuel consumption and emissions in an internal combustion engine
WO2008052360A1 (en) * 2006-11-03 2008-05-08 Nxtgen Emission Controls Inc. Fuel processor with critical flow venturi
WO2008052361A1 (en) * 2006-11-03 2008-05-08 Nxtgen Emission Controls Inc. Fuel processor
WO2008131560A1 (en) * 2007-05-01 2008-11-06 Nxtgen Emission Controls Inc. Control system and method for a fuel processor
US20090044526A1 (en) * 2007-08-13 2009-02-19 Carroll Iii John T Apparatus, system, and method for using a fraction of engine exhaust to deliver a dosant
US20090313975A1 (en) * 2008-06-23 2009-12-24 Caterpillar Inc. Air supply system for a regeneration assembly
CN103161547A (en) * 2012-05-24 2013-06-19 苏州派格丽减排系统有限公司 Selective catalytic reduction (SCR) self-suction metering injection system
WO2019046391A1 (en) * 2017-08-31 2019-03-07 Cummins Emission Solutions Inc. Inline filter assembly with purge valving

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099377A (en) * 1975-04-28 1978-07-11 Nissan Motor Company, Limited Internal combustion engine equipped with catalytic converter
US5845485A (en) * 1996-07-16 1998-12-08 Lynntech, Inc. Method and apparatus for injecting hydrogen into a catalytic converter
US6264899B1 (en) * 1996-06-28 2001-07-24 Litex, Inc. Method and apparatus for using hydroxyl to reduce pollutants in the exhaust gases from the combustion of a fuel
US6560958B1 (en) * 1998-10-29 2003-05-13 Massachusetts Institute Of Technology Emission abatement system
US6739125B1 (en) * 2002-11-13 2004-05-25 Collier Technologies, Inc. Internal combustion engine with SCR and integrated ammonia production
US6742335B2 (en) * 2002-07-11 2004-06-01 Clean Air Power, Inc. EGR control system and method for an internal combustion engine
US6775973B2 (en) * 2002-12-04 2004-08-17 Hydrogensource Llc Continuous flow, NOx-reduction adsorption unit for internal combustion engines
US6845610B2 (en) * 2000-11-30 2005-01-25 Nissan Motor Co., Ltd. Exhaust gas purification apparatus and method
US6895746B2 (en) * 2002-05-31 2005-05-24 Utc Fuel Cells, Llc Reducing oxides of nitrogen using hydrogen generated from engine fuel and exhaust
US20050223699A1 (en) * 2002-10-02 2005-10-13 Richard Ancimer Bypass controlled regeneration of NOx adsorbers
US20050274107A1 (en) * 2004-06-14 2005-12-15 Ke Liu Reforming unvaporized, atomized hydrocarbon fuel
US6976354B2 (en) * 2002-06-11 2005-12-20 Hydrogensource Llc Reducing oxides of nitrogen using reformate generated from engine fuel, water and/or air
US7062904B1 (en) * 2005-02-16 2006-06-20 Eaton Corporation Integrated NOx and PM reduction devices for the treatment of emissions from internal combustion engines
US7162861B2 (en) * 2004-02-10 2007-01-16 Southwest Research Institute Method of improving performance of emission control devices by controlling exhaust oxygen content

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099377A (en) * 1975-04-28 1978-07-11 Nissan Motor Company, Limited Internal combustion engine equipped with catalytic converter
US6264899B1 (en) * 1996-06-28 2001-07-24 Litex, Inc. Method and apparatus for using hydroxyl to reduce pollutants in the exhaust gases from the combustion of a fuel
US5845485A (en) * 1996-07-16 1998-12-08 Lynntech, Inc. Method and apparatus for injecting hydrogen into a catalytic converter
US6560958B1 (en) * 1998-10-29 2003-05-13 Massachusetts Institute Of Technology Emission abatement system
US6845610B2 (en) * 2000-11-30 2005-01-25 Nissan Motor Co., Ltd. Exhaust gas purification apparatus and method
US6895746B2 (en) * 2002-05-31 2005-05-24 Utc Fuel Cells, Llc Reducing oxides of nitrogen using hydrogen generated from engine fuel and exhaust
US6976354B2 (en) * 2002-06-11 2005-12-20 Hydrogensource Llc Reducing oxides of nitrogen using reformate generated from engine fuel, water and/or air
US6742335B2 (en) * 2002-07-11 2004-06-01 Clean Air Power, Inc. EGR control system and method for an internal combustion engine
US20050223699A1 (en) * 2002-10-02 2005-10-13 Richard Ancimer Bypass controlled regeneration of NOx adsorbers
US6739125B1 (en) * 2002-11-13 2004-05-25 Collier Technologies, Inc. Internal combustion engine with SCR and integrated ammonia production
US6775973B2 (en) * 2002-12-04 2004-08-17 Hydrogensource Llc Continuous flow, NOx-reduction adsorption unit for internal combustion engines
US7162861B2 (en) * 2004-02-10 2007-01-16 Southwest Research Institute Method of improving performance of emission control devices by controlling exhaust oxygen content
US20050274107A1 (en) * 2004-06-14 2005-12-15 Ke Liu Reforming unvaporized, atomized hydrocarbon fuel
US7062904B1 (en) * 2005-02-16 2006-06-20 Eaton Corporation Integrated NOx and PM reduction devices for the treatment of emissions from internal combustion engines

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060048502A1 (en) * 2004-07-29 2006-03-09 Washington Kirk B Integrated system for reducing fuel consumption and emissions in an internal combustion engine
WO2008052360A1 (en) * 2006-11-03 2008-05-08 Nxtgen Emission Controls Inc. Fuel processor with critical flow venturi
WO2008052361A1 (en) * 2006-11-03 2008-05-08 Nxtgen Emission Controls Inc. Fuel processor
US20080145297A1 (en) * 2006-11-03 2008-06-19 Erik Paul Johannes Fuel Processor, Components Thereof and Operating Methods Therefor
WO2008131560A1 (en) * 2007-05-01 2008-11-06 Nxtgen Emission Controls Inc. Control system and method for a fuel processor
US8926720B2 (en) 2007-05-01 2015-01-06 Westport Power Inc. Control system and method for a fuel processor
US20090044526A1 (en) * 2007-08-13 2009-02-19 Carroll Iii John T Apparatus, system, and method for using a fraction of engine exhaust to deliver a dosant
US8069655B2 (en) * 2007-08-13 2011-12-06 Cummins Filtration Ip, Inc. Apparatus, system, and method for using a fraction of engine exhaust to deliver a dosant
US8234857B2 (en) 2008-06-23 2012-08-07 Caterpillar Inc. Air supply system for a regeneration assembly
US20090313975A1 (en) * 2008-06-23 2009-12-24 Caterpillar Inc. Air supply system for a regeneration assembly
CN103161547A (en) * 2012-05-24 2013-06-19 苏州派格丽减排系统有限公司 Selective catalytic reduction (SCR) self-suction metering injection system
WO2019046391A1 (en) * 2017-08-31 2019-03-07 Cummins Emission Solutions Inc. Inline filter assembly with purge valving
CN111051660A (en) * 2017-08-31 2020-04-21 康明斯排放处理公司 Inline filter assembly with blow down valve
GB2579742A (en) * 2017-08-31 2020-07-01 Cummins Emission Solutions Inc Inline filter assembly with purge valving

Similar Documents

Publication Publication Date Title
KR101921885B1 (en) METHOD FOR REGENERATING NOx STORAGE CATALYTIC CONVERTERS OF DIESEL ENGINES WITH LOW-PRESSURE EGR
US6988360B2 (en) Exhaust emission purification device for internal combustion engine
US20050193724A1 (en) Oxygen-enriched feedgas for reformer in emissions control system
EP0861973B1 (en) Exhaust gas purifying method for engine
US6745560B2 (en) Adsorber aftertreatment system having dual soot filters
JP4720054B2 (en) Exhaust gas purification device for internal combustion engine
US6901750B2 (en) Exhaust emission control apparatus and method for internal combustion engine
US20070175206A1 (en) NOx adsorber aftertreatment system for internal combustion engines
JP2007505248A (en) Piston type internal combustion engine
US6735940B2 (en) Adsorber aftertreatment system having dual adsorbers
US10774724B2 (en) Dual stage internal combustion engine aftertreatment system using exhaust gas intercooling and charger driven air ejector
US20060112681A1 (en) Exhaust emission control device of internal combustion engine
RU2553847C2 (en) Diesel engine of motor vehicle
US20200408141A1 (en) Low-pressure egr system with turbo bypass
US10508578B2 (en) Engine system
JP2007263033A (en) Engine with supercharger
JP4259275B2 (en) Method for poisoning regeneration of reforming catalyst and poisoning regeneration device
CN108374709A (en) Exhaust aftertreatment
JP2005351095A (en) Internal combustion engine equipped with exhaust recirculating device
JP2004092431A (en) Emission control device
JP4893493B2 (en) Exhaust gas purification device for internal combustion engine
JP2002081311A (en) Exhaust emission control device for internal combustion engine
JP2005240566A (en) Method of controlling exhaust emission control device
JP2008051009A (en) Exhaust emission control device
JP4106913B2 (en) Exhaust gas purification device for internal combustion engine

Legal Events

Date Code Title Description
AS Assignment

Owner name: SOUTHWEST RESEARCH INSTITUTE, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WEBB, CYNTHIA C.;ANTHONY, JOSEPH W.;REEL/FRAME:016048/0491

Effective date: 20050520

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION