EP1999348B1 - Dieselabgas-dosierungsstruktur - Google Patents
Dieselabgas-dosierungsstruktur Download PDFInfo
- 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
Links
- 239000000446 fuel Substances 0.000 claims description 20
- 239000002283 diesel fuel Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- 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)
- Dosierkonstruktion zum Einspeisen von Dieselkraftstoff in einen Abgaskanal (12) einer Dieselanlage, wobei die Dosierkonstruktion Folgendes umfasst:ein elektrisch betriebenes Steuerventil (31), das so konstruiert und angeordnet ist, dass es mit Dieselkraftstoff versorgt wird,ein Dosierventil (32), das so konstruiert und angeordnet ist, dass es von dem Steuerventil mit Kraftstoff versorgt wird und diesen in den Abgaskanal abgibt, undein Verlängerungsrohr (48), welches für eine Fluidverbindung zwischen dem Steuerventil und dem Dosierventil sorgt und so das Steuerventil in einem Abstand von dem Dosierventil hält und es ermöglicht, dass Kraftstoff von dem Steuerventil über das Verlängerungsrohr an das Dosierventil abgegeben wird,wobei es sich bei dem Dosierventil um ein Tellerventil handelt, das ganz aus Metall besteht, so dass das Dosierventil (32) keine Wasserkühlung benötigt.
- Konstruktion nach Anspruch 1, bei der es sich bei dem Steuerventil um ein Kraftstoffeinspritzventil handelt.
- Konstruktion nach Anspruch 1, bei der das Tellerventil so konstruiert und angeordnet ist, dass es mit einem Abgaskrümmer verbunden werden kann.
- Konstruktion nach Anspruch 3, bei der das Tellerventil Gewinde zum Eingreifen in den Krümmer aufweist.
- Konstruktion nach Anspruch 1, bei der es sich bei dem Verlängerungsrohr um ein Metallrohr handelt.
- Konstruktion nach Anspruch 1, bei der es sich bei dem Verlängerungsrohr um einen Schlauch handelt.
- Konstruktion nach Anspruch 6, bei der es sich bei dem Schlauch um glasfaserverstärkten Teflonschlauch handelt.
- Konstruktion nach Anspruch 1 in Kombination mit einer Steuereinheit, die den Betrieb des Steuerventils elektronisch steuert.
- Konstruktion nach Anspruch 1, bei der das Tellerventil ein Ventilelement aufweist, das so konstruiert und angeordnet ist, dass es in geöffneter Position vom Körper des Tellerventils aus nach außen verläuft.
- Verfahren zum Einspeisen von Dieselkraftstoff in einen Abgaskanal (12) einer Dieselanlage zum Reduzieren von Ruß im Abgaskanal, wobei das Verfahren folgende Schritte umfasst:Bereitstellen eines Dosierventils (32), das mit einem Abgaskanal einer Dieselanlage verbunden ist,Bereitstellen eines elektrisch betriebenen Steuerventils (31), das mit dem Dosierventil verbunden ist und dieses mit Dieselkraftstoff versorgt,Anordnen des Steuerventils in einem Abstand zum Dosierventil, so dass die in dem Abgaskanal erzeugte Wärme am Steuerventil geringer ist als am Dosierventil, undBetreiben des Steuerventils, um das Dosierventil mit Dieselkraftstoff zu versorgen, wobei das Dosierventil Dieselkraftstoff in den Abgaskanal einspritzt,wobei das Bereitstellen des Dosierventils das Bereitstellen eines ganz aus Metall bestehenden Tellerventils als Dosierventil umfasst, so dass das Dosierventil keine Wasserkühlung benötigt.
- Verfahren nach Anspruch 10, bei dem das Bereitstellen des Steuerventils das Bereitstellen eines Kraftstoffeinspritzventils als Steuerventil umfasst.
- Verfahren nach Anspruch 10, bei dem das Anordnen in einem Abstand das Bereitstellen eines Verlängerungsrohrs umfasst, welches für eine Fluidverbindung zwischen dem Steuerventil und dem Dosierventil sorgt.
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 (en) | 2006-03-17 | 2007-03-19 | Diesel exhaust dosing structure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1999348A1 EP1999348A1 (de) | 2008-12-10 |
EP1999348B1 true EP1999348B1 (de) | 2010-06-23 |
Family
ID=38190958
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07753445A Active EP1999348B1 (de) | 2006-03-17 | 2007-03-19 | Dieselabgas-dosierungsstruktur |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070227127A1 (de) |
EP (1) | EP1999348B1 (de) |
JP (1) | JP2009541627A (de) |
DE (1) | DE602007007306D1 (de) |
WO (1) | WO2007109233A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007022206A1 (en) * | 2005-08-15 | 2007-02-22 | Siemens Vdo Automotive Corporation | Automotive diesel exhaust hc dosing valve |
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)
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 |
WO2007022206A1 (en) * | 2005-08-15 | 2007-02-22 | Siemens Vdo Automotive Corporation | Automotive diesel exhaust hc dosing valve |
-
2007
- 2007-03-16 US US11/723,049 patent/US20070227127A1/en not_active Abandoned
- 2007-03-19 DE DE602007007306T patent/DE602007007306D1/de active Active
- 2007-03-19 EP EP07753445A patent/EP1999348B1/de active Active
- 2007-03-19 WO PCT/US2007/006818 patent/WO2007109233A1/en active Application Filing
- 2007-03-19 JP JP2009501494A patent/JP2009541627A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2007109233A1 (en) | 2007-09-27 |
EP1999348A1 (de) | 2008-12-10 |
JP2009541627A (ja) | 2009-11-26 |
DE602007007306D1 (de) | 2010-08-05 |
US20070227127A1 (en) | 2007-10-04 |
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