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EP1999348B1 - Structure de dosage d'échappement de système diesel - Google Patents

Structure de dosage d'échappement de système diesel Download PDF

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Publication number
EP1999348B1
EP1999348B1 EP07753445A EP07753445A EP1999348B1 EP 1999348 B1 EP1999348 B1 EP 1999348B1 EP 07753445 A EP07753445 A EP 07753445A EP 07753445 A EP07753445 A EP 07753445A EP 1999348 B1 EP1999348 B1 EP 1999348B1
Authority
EP
European Patent Office
Prior art keywords
valve
dosing
control valve
fuel
exhaust passage
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.)
Active
Application number
EP07753445A
Other languages
German (de)
English (en)
Other versions
EP1999348A1 (fr
Inventor
Michael J. Hornby
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.)
Continental Automotive Systems Inc
Original Assignee
Continental Automotive Systems US Inc
Continental Automotive Systems Inc
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
Application filed by Continental Automotive Systems US Inc, Continental Automotive Systems Inc filed Critical Continental Automotive Systems US Inc
Publication of EP1999348A1 publication Critical patent/EP1999348A1/fr
Application granted granted Critical
Publication of EP1999348B1 publication Critical patent/EP1999348B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • 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
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus

Definitions

  • This invention relates to reducing and trapping diesel particulates of a diesel engine for vehicles.
  • HC hydrocarbon
  • CO carbon monoxide
  • NOx nitrogen oxide
  • a diesel particulate filter In diesel engine systems, a diesel particulate filter (DPF), is provided to trap the particulate matter in the exhaust passage of the diesel engine.
  • DPF diesel particulate filter
  • a dosing valve is mounted into the exhaust manifold of a diesel system to inject diesel fuel into the exhaust to reduce the particulate matter and thus reduce NOx emissions. Since the temperature of the exhaust manifold can reach 600 C, water cooling is required to ensure that the valve survives. Such a water cooling is known from the documents EP 1 211 396 A2 and EP 1 176 292 A1 .
  • An object of the invention is to fulfill the need referred to above.
  • this objective is achieved by providing dosing structure for supplying diesel fuel to an exhaust passage of a diesel system.
  • the dosing structure includes an electrically operated control valve constructed and arranged to receive a supply of diesel fuel.
  • a dosing valve is constructed and arranged to receive fuel from the control valve and to deliver the fuel to the exhaust passage.
  • An extension tube is fluidly coupled between the control valve and the dosing valve to space the control valve from the dosing valve and to permit fuel to be delivered from the control valve, through the extension tube, and to the dosing valve.
  • a method for supplying diesel fuel to an exhaust passage of a diesel system to reduce particulates in the exhaust passage.
  • the method provides a dosing valve coupled to an exhaust passage of a diesel system.
  • An electrically operated control valve is associated with the dosing valve to supply diesel fuel to the dosing valve.
  • the method spaces the control valve from the dosing valve such that heat generated in the exhaust passage is less at the control valve than at the dosing valve.
  • the control valve is operated to supply diesel fuel to the dosing valve with the dosing valve injecting diesel fuel into the exhaust passage.
  • a multi-cylinder diesel engine for vehicles is provided with an exhaust passage 12 and intake passage 13.
  • the intake passage 13 is distributes intake air to each cylinder.
  • the exhaust passage 12 and the intake passage 13 are connected by an exhaust gas recirculation (EGR) passage 14 in the conventional manner.
  • EGR exhaust gas recirculation
  • the engine 10 is provided with a common rail fuel injection device, generally indicated at 16.
  • the fuel injection device 16 is provided with a supply pump 18, common rail 20 and an injector 22 provided for every cylinder. Fuel pressurized by the supply pump 18 is distributed to each injector 22 via the common rail 20.
  • a variable capacity turbocharger 24 is provided in the exhaust passage 12 downstream of the EGR passage 14.
  • Compressor 26, installed in the intake passage 13, can be considered to be part of the turbocharger 24.
  • a turbine (not shown) of the turbocharger 24 transforms the energy of the flow of exhaust gas into rotational energy, and can drive the compressor 26 using this rotational energy.
  • a diesel particulate filter (DPF) 28 which traps particulate matter in the exhaust gas is installed in the exhaust passage 12 downstream of the turbine 24. Diesel fuel bums off the particulates trapped in the filter, thus regenerating particulate storage capacity.
  • DPF diesel particulate filter
  • a dosing structure is provided in the exhaust passage 12 upstream of the filter 28.
  • the dosing structure 30 includes a control valve 31, a dosing valve 32 and an extension tube 48 there-between.
  • the dosing valve 32 is preferably in the form of a poppet valve.
  • the poppet valve 32 has a valve member 34 that extends outwardly from a body 36 of the valve 31 when in the opened position, permitting fuel to flow into the exhaust line 12. End 38 is inserted (e.g., threaded) into the exhaust manifold 40 (see FIG. 2 ).
  • the poppet valve 32 preferably has all metal construction (e.g., stainless steel), capable of withstanding the high temperature of the manifold 40.
  • the poppet valve 32 is constructed and arranged to create a particular spray configuration into the exhaust passage.
  • the control valve 31 is preferably a gasoline, electrically operated fuel injector without a precision orifice. Since there is no need for special spray patterns from the injector, a simple pencil stream is sufficient.
  • a suitable injector can be of the type disclosed in U.S. Patent No 6,685,112 , the content of which is hereby incorporated by reference into this specification.
  • the control valve 31 has a fuel inlet 42 and a fuel outlet 44.
  • the inlet 42 receives diesel fuel from the tank 46 ( FIG. 1 ).
  • the fuel outlet 44 is connected with one end of the extension tube 48, with another end of the extension tube being connected with an inlet 50 of the dosing valve 32.
  • the control valve 31 controls the flow rate to the dosing valve 32 and also shuts-off the flow.
  • the extension tube 48 is of sufficient length to place the control valve 31 away from the heat of the manifold 40.
  • the extension tube 48 can be a metal tube or can be a flexible tube such as a fiberglass braided Teflon hose, capable of withstanding 230 C. Utilization of the flexible extension tube allows for mounting the control valve 31 on a chassis and the dosing valve 32 on the exhaust. This configuration accommodates large amounts of displacement. In other applications, the control valve and the dosing valve are mounted on the engine, thus a metal extension tube can be used. All connections between the tube 48 and the valves 31 and 32 are preferably welded.
  • FIG. 3 show a block diagram of a dosing system, generally indicated at 53, employing the dosing structure 30. Electrical connections are shown in dashed lines.
  • an Electronic Control Unit (ECU) 54 can periodically control a fuel pump 56 to deliver diesel fuel from tank 28 to the control valve 31.
  • the ECU also controls the control valve 31 to send fuel through the extension tube 48 to the dosing valve 32 and into the exhaust line 12 to reduce particulates and possibly reduce NOx emissions.
  • a separate controller can control the fuel injector 31.
  • the dosing structure 30 also reduces oil dilution. In addition, system cost is reduced since a smaller particulate trap can be used, the water cooled system is eliminated, O-rings and polymers are eliminated in high temperature locations, and the structure 30 uses exiting technologies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Claims (12)

  1. Structure de dosage pour envoyer du carburant diesel à un conduit ( 12 ) d'échappement d'un système diesel, la structure de dosage comprenant :
    une soupape ( 31 ) de commande, fonctionnant électriquement et construite et agencée pour recevoir une alimentation en carburant diesel,
    une soupape ( 32 ) de dosage construite et agencée, pour recevoir du carburant de la soupape de commande et pour envoyer le carburant au conduit d'échappement, et
    un tube ( 48 ) de rallonge monté fluidiquement entre la soupape de commande et la soupape de dosage, pour mettre la soupape de commande à distance de la soupape de dosage et pour permettre d'envoyer du carburant à partir de la soupape de commande à la soupape de dosage en passant par le tube de rallonge
    dans laquelle la soupape de dosage est une soupape en champignon entièrement en métal, de manière à éliminer un refroidissement par de l'eau de la soupape ( 32 ) de dosage.
  2. Structure suivant la revendication 1, dans laquelle la soupape de commande est un injecteur de carburant.
  3. Structure suivant la revendication 1, dans laquelle la soupape en champignon est construite et agencée, de manière à être couplée à un collecteur d'échappement.
  4. Structure suivant la revendication 3, dans laquelle la soupape en champignon comprend des filetages pour visser le collecteur.
  5. Structure suivant la revendication 1, dans laquelle le tube de rallonge est un tube métallique.
  6. Structure suivant la revendication 1, dans laquelle le tube de rallonge est un tube souple.
  7. Structure suivant la revendication 6, dans laquelle le tube souple est un tuyau en Téflon tressé de fibres de verre.
  8. Structure suivant la revendication 1, en combinaison avec une unité de commande commandant électroniquement le fonctionnement de la soupape de commande.
  9. Structure suivant la revendication 1, dans laquelle la soupape en champignon a un élément de soupape construit et agencé pour, en position ouverte, s'étendre à l'extérieur d'un corps de la soupape en champignon.
  10. Procédé d'envoi de carburant diesel à un conduit ( 12 ) d'échappement d'un système diesel, pour réduire les particules dans le conduit d'échappement, le procédé comprenant les stades, dans lesquels :
    on prévoit une soupape ( 32 ) de dosage couplée à un conduit d'échappement d'un système diesel,
    on prévoit une soupape ( 31 ) de commande fonctionnant électriquement associée à la soupape de dosage, pour envoyer du carburant diesel à la soupape de dosage,
    on met la soupape de commande à distance de la soupape de dosage, de manière à ce que de la chaleur engendrée dans le conduit d'échappement soit moindre à la soupape de commande qu'à la soupape de dosage, et
    on fait fonctionner la soupape de commande, pour envoyer du carburant diesel à la soupape de dosage alors que la soupape de dosage injecte du carburant diesel dans le conduit d'échappement
    dans lequel le stade dans lequel on prévoit la soupape de dosage comprend le stade dans lequel on prévoit une soupape en champignon composée entièrement en métal comme soupape de dosage, de sorte qu'un refroidissement par de l'eau de la soupape de dosage est éliminé.
  11. Procédé suivant la revendication 10, dans lequel le stade dans lequel on prévoit la soupape de commande comprend le stade dans lequel on prévoit un injecteur de carburant comme soupape de commande.
  12. Procédé suivant la revendication 10, dans lequel le stade de mise à distance comprend le stade dans lequel on prévoit un tube de rallonge monté fluidiquement entre la soupape de dosage et la soupape de commande.
EP07753445A 2006-03-17 2007-03-19 Structure de dosage d'échappement de système diesel Active EP1999348B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US78355806P 2006-03-17 2006-03-17
US11/723,049 US20070227127A1 (en) 2006-03-17 2007-03-16 Diesel exhaust dosing valve
PCT/US2007/006818 WO2007109233A1 (fr) 2006-03-17 2007-03-19 Structure de dosage d'échappement de système diesel

Publications (2)

Publication Number Publication Date
EP1999348A1 EP1999348A1 (fr) 2008-12-10
EP1999348B1 true EP1999348B1 (fr) 2010-06-23

Family

ID=38190958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07753445A Active EP1999348B1 (fr) 2006-03-17 2007-03-19 Structure de dosage d'échappement de système diesel

Country Status (5)

Country Link
US (1) US20070227127A1 (fr)
EP (1) EP1999348B1 (fr)
JP (1) JP2009541627A (fr)
DE (1) DE602007007306D1 (fr)
WO (1) WO2007109233A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112006002122B4 (de) * 2005-08-15 2016-09-22 Continental Automotive Systems, Inc. ( n. d. Ges. d. Staates Delaware ) Dieselabgas-Kohlenwasserstoff-Dosierventil für Fahrzeuge
US7721533B2 (en) * 2007-05-15 2010-05-25 Continental Automotive Systems Us, Inc. Diesel dosing system relief of trapped volume fluid pressure at shutdown
DE102009000509A1 (de) * 2009-01-09 2010-07-15 Robert Bosch Gmbh Einspritzventil und Dosiersystem für eine Abgasnachnbehandlungseinrichtung
US9416709B2 (en) * 2012-06-15 2016-08-16 Continental Automotive Systems, Inc. Coking resistant after-treatment dosing value

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5239969A (en) * 1991-10-08 1993-08-31 Southwest Research Institute Mechanical fuel injector for internal combustion engines
US5709080A (en) * 1996-03-15 1998-01-20 Caterpillar Inc. Leak detection method and apparatus for an exhaust purification system
DE19625447B4 (de) * 1996-06-26 2006-06-08 Robert Bosch Gmbh Rohrverdampfer für Zusatzkraftstoff ins Abgas
US6289869B1 (en) * 1997-09-12 2001-09-18 George D. Elliott Electromagnetic fuel ram-injector and improved ignitor
US6047907A (en) * 1997-12-23 2000-04-11 Siemens Automotive Corporation Ball valve fuel injector
DE19855385A1 (de) * 1998-12-01 2000-06-08 Bosch Gmbh Robert Vorrichtung zum Nachbehandeln von Abgasen einer Brennkraftmaschine
JP2000291429A (ja) * 1999-04-01 2000-10-17 Nippon Soken Inc 排気系炭化水素添加装置
JP3473583B2 (ja) * 2000-07-24 2003-12-08 トヨタ自動車株式会社 内燃機関の排気浄化装置
JP3504920B2 (ja) * 2000-12-01 2004-03-08 トヨタ自動車株式会社 内燃機関の排気浄化装置
DE112006002122B4 (de) * 2005-08-15 2016-09-22 Continental Automotive Systems, Inc. ( n. d. Ges. d. Staates Delaware ) Dieselabgas-Kohlenwasserstoff-Dosierventil für Fahrzeuge

Also Published As

Publication number Publication date
DE602007007306D1 (de) 2010-08-05
EP1999348A1 (fr) 2008-12-10
US20070227127A1 (en) 2007-10-04
JP2009541627A (ja) 2009-11-26
WO2007109233A1 (fr) 2007-09-27

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