US20100064667A1 - Apparatus and method for exhaust gas posttreatment - Google Patents

Apparatus and method for exhaust gas posttreatment Download PDF

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Publication number
US20100064667A1
US20100064667A1 US12/296,776 US29677607A US2010064667A1 US 20100064667 A1 US20100064667 A1 US 20100064667A1 US 29677607 A US29677607 A US 29677607A US 2010064667 A1 US2010064667 A1 US 2010064667A1
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US
United States
Prior art keywords
exhaust gas
particle filter
pressure turbine
gas system
metering device
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
US12/296,776
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English (en)
Inventor
Ralf Wirth
Wolfram Veigel
Stefan Motz
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.)
Robert Bosch GmbH
Original Assignee
Individual
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
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Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VEIGEL, WOLFRAM, MOTZ, STEFAN, WIRTH, RALF
Publication of US20100064667A1 publication Critical patent/US20100064667A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of 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
    • 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
    • F01N3/02—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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • 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
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/004—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust drives arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
    • F02B37/025—Multiple scrolls or multiple gas passages guiding the gas to the pump drive
    • 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 invention is based on an apparatus for exhaust gas posttreatment as generically defined by independent claim 1 and by an associated method for exhaust gas posttreatment.
  • an exhaust gas temperature in the diesel particle filter is raised to at least 600-620° C.
  • This temperature increase can be achieved in part by provisions internal to the engine, such as throttling or postponing the onset of either the primary injection or a burning postinjection.
  • a further temperature increase can be achieved as a rule via an oxidation catalytic converter located upstream of the diesel particle filter.
  • a regeneration agent such as uncombusted fuel, is introduced into the exhaust gas.
  • a nonburning postinjection has the advantage that the introduced fuel, virtually ideally mixed, can act on the oxidation catalytic converter, and as a result the catalytic surface area of the oxidation catalytic converter can be optimally utilized.
  • the nonburning postinjection causes pronounced thinning of the oil, as a result of which the oil change intervals have to be shortened drastically.
  • Another disadvantage of the nonburning postinjection is in principle that the engine in this operating mode has a desired, very high emission of hydrocarbons, and the exhaust gas recirculation valve has to stay closed during the regeneration mode of the diesel particle filter, since otherwise, fuel would be undesirably delivered to a combustion chamber via the fresh-air supply, causing the engine to “race”.
  • the exhaust gas posttreatment apparatus for an internal combustion engine with two-stage supercharging, having the characteristics of independent claim 1 , has the advantage over the prior art that a metering device for introducing a regeneration agent is disposed in the exhaust gas system between a high-pressure turbine and a low-pressure turbine.
  • a metering device for introducing a regeneration agent is disposed in the exhaust gas system between a high-pressure turbine and a low-pressure turbine.
  • a further advantage of the disposition according to the invention of the Metering device results from the fact that the high-pressure turbine draws enthalpy from the exhaust gas, and as a result, compared to a disposition at the engine outlet manifold, the exhaust gas at the metering device is cooled markedly, so that cooling the metering valve entails less effort and expense.
  • the method for exhaust gas posttreatment according to the invention of an internal combustion engine with two-stage supercharging, having the characteristics of independent claim 5 has the advantage over the prior art that a regeneration agent for thermal regeneration of a soot-laden particle filter is introduced into the exhaust gas system between a high-pressure turbine and a low-pressure turbine, and an optimal exhaust gas posttreatment can be achieved without additional components, merely by utilizing the structural makeup of the exhaust gas system.
  • the metering device is disposed upstream of the low-pressure turbine in such a way that the latter effects uniform thorough mixing of the regeneration agent and the exhaust gas in the exhaust gas system.
  • the low-pressure turbine, downstream of the metering device in the exhaust gas system is advantageously utilized as an active mixer element.
  • At least one temperature sensor which is evaluated for adjusting the metering device, is disposed in the exhaust gas system.
  • a pressure difference sensor can present, which determines the pressure difference above the particle filter, from which difference a load state of the particle filter can be ascertained.
  • the introduction of the regeneration agent into the exhaust gas system can be effected such that the low-pressure turbine effects uniform thorough mixing of the regeneration agent and the exhaust gas in the exhaust gas system, and as a result, the oxidation catalytic converter disposed in the exhaust gas system is uniformly subjected to reducing agent.
  • FIGURE is a block diagram of an exhaust gas posttreatment apparatus according to the invention for an internal combustion engine that is supercharged in two stages.
  • an exhaust gas posttreatment apparatus 1 for an internal combustion engine 2 supercharged in two stages includes an oxidation catalytic converter 3 , a particle filter 4 , and a metering device 7 for introducing a regeneration agent into an exhaust gas system 8 .
  • the two-stage supercharging of the engine 2 is necessary in particular to meet future limit values for emissions in the field of utility motor vehicles.
  • the structural makeup of the exhaust gas system of the engine 2 supercharged in two stages can be utilized to achieve optimal functionality of the oxidation catalytic converter 3 , using regeneration agent metering downstream of the engine.
  • the metering device 7 is disposed in the exhaust gas system 8 between a high-pressure turbine 5 and a low-pressure turbine 6 that effect the two-stage supercharging of the engine 2 .
  • the metering device 7 is disposed upstream of the low-pressure turbine 6 in such a way that the low-pressure turbine 6 can be used as an active mixer element, which effects uniform thorough mixing of the regeneration agent and the exhaust gas in the exhaust gas system 8 .
  • the metering device 7 By the disposition of the metering device 7 downstream of the high-pressure turbine 5 , a return of the regeneration agent via an exhaust gas recirculation line 9 is prevented, since the exhaust gas recirculation line 9 and the metering device 7 are separated from one another by the high-pressure turbine 5 . Furthermore, the high-pressure turbine 5 draws enthalpy from the exhaust gas, and as a result, compared to a disposition at the engine outlet manifold, the exhaust gas is cooled down markedly at the metering device 7 , so that cooling the metering device 7 entails less effort and expense.
  • the exhaust gas posttreatment apparatus 1 includes a pressure difference sensor 12 , which determines the pressure difference above the particle filter 4 .
  • the pressure difference sensor 12 can also be evaluated for activating and/or adjusting the metering device 7 .
  • the regeneration agent such as uncombusted fuel
  • the metering device 7 into the exhaust gas system 8 between the high-pressure turbine 5 and the low-pressure turbine 6 , and the low-pressure turbine 6 , as already noted above, effects uniform thorough mixing of the regeneration agent and the exhaust gas in the exhaust gas system 8 , as a result of which the oxidation catalytic converter 3 , located downstream of the low-pressure turbine 6 in the exhaust gas system 8 , is uniformly subjected to reducing agent and is operated at high efficiency.
  • the invention advantageously utilizes the structural makeup of the exhaust gas system of an internal combustion engine, supercharged in two stages, without additional components for achieving metering of the regeneration agent downstream of the engine, and particularly for utility motor vehicles, the invention makes a concept for certain, economical regeneration of a particle filter system available.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)
US12/296,776 2006-06-06 2007-04-25 Apparatus and method for exhaust gas posttreatment Abandoned US20100064667A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006026159.3 2006-06-06
DE102006026159A DE102006026159A1 (de) 2006-06-06 2006-06-06 Vorrichtung und Verfahren zur Abgasnachbehandlung
PCT/EP2007/054060 WO2007141093A1 (fr) 2006-06-06 2007-04-25 Dispositif et procédé de post-traitement des gaz d'échappement

Publications (1)

Publication Number Publication Date
US20100064667A1 true US20100064667A1 (en) 2010-03-18

Family

ID=38158059

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/296,776 Abandoned US20100064667A1 (en) 2006-06-06 2007-04-25 Apparatus and method for exhaust gas posttreatment

Country Status (4)

Country Link
US (1) US20100064667A1 (fr)
EP (1) EP2029867B1 (fr)
DE (1) DE102006026159A1 (fr)
WO (1) WO2007141093A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2937374A3 (fr) * 2008-10-21 2010-04-23 Renault Sas Echappement de moteur a combustion interne comportant un injecteur de reducteur et procede associe
SE533470C2 (sv) 2009-02-05 2010-10-05 Scania Cv Abp Anordning samt förfarande för test av avgasreningssystem
DE102009014361A1 (de) * 2009-03-21 2010-09-23 Daimler Ag Abgasbehandlungseinrichtung und Verfahren zum Betreiben einer Abgasbehandlungseinrichtung
DE102010005813A1 (de) * 2010-01-27 2011-07-28 Bayerische Motoren Werke Aktiengesellschaft, 80809 Abgasanlage für eine Brennkraftmaschine
SE535773C2 (sv) * 2010-08-13 2012-12-11 Scania Cv Ab Arrangemang för att spruta in ett reduktionsmedel i en avgasledning hos en förbränningsmotor
DE102011105049B4 (de) * 2011-06-20 2015-08-20 Mtu Friedrichshafen Gmbh Brennkraftmaschine
DE102012216885B4 (de) * 2011-10-24 2014-05-08 Ford Global Technologies, Llc Abgasnachbehandlungssystem
DE102017206888A1 (de) * 2017-04-25 2018-10-25 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Erhöhen der Abgastemperatur eines Dieselmotors

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040244366A1 (en) * 2003-03-25 2004-12-09 Satoshi Hiranuma Exhaust gas purifying system and exhaust gas purifying method
US20050103013A1 (en) * 2003-11-17 2005-05-19 Dennis Brookshire Dual and hybrid EGR systems for use with turbocharged engine
US20050247284A1 (en) * 2002-05-14 2005-11-10 Weber James R Air and fuel supply system for combustion engine operating at optimum engine speed
US20060080953A1 (en) * 2003-05-09 2006-04-20 Emitech Gesellschaft Fur Method for regenerating a particle trap and exhaust system
US20070056264A1 (en) * 2003-06-12 2007-03-15 Donaldson Company, Inc. Method of dispensing fuel into transient flow of an exhaust system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63309727A (ja) * 1987-06-10 1988-12-16 Yanmar Diesel Engine Co Ltd 排気タ−ボ過給機付内燃機関の排気ガス処理装置
DE19855384A1 (de) 1998-12-01 2000-06-08 Bosch Gmbh Robert Vorrichtung zum Nachbehandeln von Abgasen einer Brennkraftmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050247284A1 (en) * 2002-05-14 2005-11-10 Weber James R Air and fuel supply system for combustion engine operating at optimum engine speed
US20040244366A1 (en) * 2003-03-25 2004-12-09 Satoshi Hiranuma Exhaust gas purifying system and exhaust gas purifying method
US20060080953A1 (en) * 2003-05-09 2006-04-20 Emitech Gesellschaft Fur Method for regenerating a particle trap and exhaust system
US20070056264A1 (en) * 2003-06-12 2007-03-15 Donaldson Company, Inc. Method of dispensing fuel into transient flow of an exhaust system
US20050103013A1 (en) * 2003-11-17 2005-05-19 Dennis Brookshire Dual and hybrid EGR systems for use with turbocharged engine

Also Published As

Publication number Publication date
EP2029867B1 (fr) 2014-08-06
EP2029867A1 (fr) 2009-03-04
DE102006026159A1 (de) 2007-12-13
WO2007141093A1 (fr) 2007-12-13

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Owner name: ROBERT BOSCH GMBH,GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WIRTH, RALF;VEIGEL, WOLFRAM;MOTZ, STEFAN;SIGNING DATES FROM 20081027 TO 20081106;REEL/FRAME:023637/0995

STCB Information on status: application discontinuation

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