WO2010079012A1 - Soupape d'injection et système de dosage pour un système de post-traitement de gaz d'échappement - Google Patents

Soupape d'injection et système de dosage pour un système de post-traitement de gaz d'échappement Download PDF

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Publication number
WO2010079012A1
WO2010079012A1 PCT/EP2009/066024 EP2009066024W WO2010079012A1 WO 2010079012 A1 WO2010079012 A1 WO 2010079012A1 EP 2009066024 W EP2009066024 W EP 2009066024W WO 2010079012 A1 WO2010079012 A1 WO 2010079012A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
seat
injection valve
fuel
injection
Prior art date
Application number
PCT/EP2009/066024
Other languages
German (de)
English (en)
Inventor
Christian Bayer
Steffen Schweizer
Andreas Krause
Jochen Klein
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2010079012A1 publication Critical patent/WO2010079012A1/fr

Links

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
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
    • 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
    • F01N13/00—Exhaust 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
    • F01N13/009—Exhaust 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 having two or more separate purifying devices 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
    • 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
    • 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

Definitions

  • the diesel fuel is injected above the oxidation catalyst in the exhaust line.
  • the injected fuel reacts with the unburned oxygen in the exhaust gas, so that the exhaust gas temperature when flowing through the
  • Oxidation catalyst increased to about 600 0 C. At this exhaust gas temperature, the soot stored in the downstream particulate filter burns off and the particulate filter is regenerated.
  • Exhaust after-treatment device of an internal combustion engine having a valve needle, a valve seat, a valve spring and a spring plate, wherein the valve needle has a shaft and a valve plate with a frusto-conical sealing surface, characterized in that between shaft and sealing surface, a rotationally symmetric transition surface is present, and that an angular difference between a seat angle the valve seat and the transition surface of the valve disk between 2 ° and 20 °, preferably 10 °.
  • the seat surface of the valve seat has a seat angle of 55 ° to 75 °, particularly preferably from 60 ° to 70 °. This makes it possible, on the one hand, to achieve a sufficiently large sealing surface between valve disk and valve seat. This increases the life of the injector. On the other hand, the surface pressure is also large enough to ensure reliable sealing.
  • an angular difference between the seat angle of the valve seat and the frusto-conical seat surface of the valve disk is 2 ° C.
  • a side of the valve disk facing the valve seat can be curved in cross-section and / or for this curved side of the valve disk to tangentially contact the valve seat when the valve needle is closed.
  • the fine atomization of the fuel according to the invention can be achieved safely and reliably with little effort and also injection valves produced in large series.
  • the object underlying the invention is also achieved by a metering system according to the independent claim 6 by an injector according to the invention is used.
  • Figure 1 is a schematic representation of an internal combustion engine with an exhaust aftertreatment device according to the invention
  • Fig. 2 shows a section through an embodiment of an injection valve according to the invention
  • an internal combustion engine 1 with an exhaust gas aftertreatment device 3 is greatly simplified and shown schematically.
  • the exhaust aftertreatment device 3 comprises an exhaust pipe 5, an optional oxidation catalyst 6 and a particulate filter 7.
  • the particulate filter 7 is usually arranged downstream of the oxidation catalyst 6.
  • the flow direction of the exhaust gas through the exhaust pipe 5 is indicated by arrows.
  • the fuel injection system of the internal combustion engine 1 is very simplified in Figure 1 and shown reduced to the essentials.
  • a pre-feed pump or low-pressure pump 11 delivers fuel from a fuel tank 13 to a high-pressure fuel pump 15.
  • the low-pressure pump 11 has a delivery pressure of about four to six bar and supplies the high-pressure fuel pump 15 with fuel from the fuel tank 13 injectors 17 are arranged in the cylinder head of the internal combustion engine, which in turn are supplied by the high-pressure fuel pump 15 with fuel under high pressure.
  • a metering system which comprises a fuel line 19, a metering unit 21 designed as a 2/2-way valve and an injection valve 9.
  • the injection valve 9 is disposed upstream of the oxidation catalyst 6.
  • the dosing unit 21 can also be connected to the return line (not shown) of the injectors 17.
  • the injection valve 9 is supplied via a fuel line 19 from the low-pressure pump 11 with fuel.
  • the injection valve 9 is a passive component and opens as soon as there is a pressure in the fuel line 19.2 which is greater than or equal to the opening pressure of the injection valve 9.
  • the Opening pressure of the injection valve 9 is lower than the delivery pressure of the low-pressure pump 11 or the pressure in the return system of the injectors 17th
  • the fuel line 19 is separated from the metering unit 21 into a first section 19.1 and a second section 19.2.
  • the metering unit 21 is closed, as shown in Figure 1, the second portion 19.2 of the fuel line 19 is depressurized and the injection valve 9 is closed.
  • the dosing unit 21 is controlled by an engine control unit (not shown) or a separate control unit in the second switching position (not shown), so that a hydraulic connection between the first portion 19.1 and the second portion 19.2 of the fuel line 19 is produced.
  • the injection valve 19 is acted upon by the delivery pressure of the low-pressure pump 11 and opens.
  • a finely divided fuel mist is injected into the exhaust pipe 5 through the injection valve 9.
  • FIG. 2 shows an embodiment of an injection valve 9 according to the invention in cross-section. Based on this representation, some terms are explained.
  • the injection valve 9 comprises a housing 23 with a centrally arranged and in the illustrated embodiment also stepped bore 25.
  • a valve seat 27 is arranged at the lower part of the housing 9 in Figure 2, a valve seat 27 is arranged.
  • the valve seat 27 is fixed in the illustrated embodiment by crimping in a shoulder of the housing 23.
  • the valve seat 27 has a frustoconical seat surface 29.
  • the cone angle of this seat 29, also referred to as seat angle, is designated in Figure 2 by the reference numeral. It has been found in experiments that seat angle in a range of 55 ° to 75 °, preferably in a range of 60 ° to 70 °, cause a particularly fine atomization of the fuel and are therefore particularly advantageous.
  • the valve seat 27 cooperates with a valve disk 31 of a valve needle 33.
  • the valve needle 33 comprises, in addition to the valve disk 31, a shaft 35.
  • a spring plate 37 is fastened in a form-fitting manner.
  • the spring plate 37 serves to transmit the closing force provided by a closing spring 39 to the valve needle 33.
  • the closing spring 39 is supported at one end against the valve seat 27 and at the other end against the spring plate 37.
  • the entire interior of the injection valve 9 and with it the bore 25 are filled with fuel during operation of the injection valve 9.
  • the valve disk 31 lifts the valve needle 33 away from the seat surface 29.
  • a narrow annular gap between the valve disk 31 and seat surface 29 is released and the fuel finely atomized injected into the exhaust pipe (not shown).
  • valve seat 27 and the valve seat 31 are shown in detail and enlarged. All these embodiments have in common that they cause a very fine atomization of the fuel and at the same time are very resistant to wear.
  • a sealing surface 30 of the valve disk 31 is easy to see due to the enlarged view.
  • the frusto-conical sealing surface 30 of the valve disk 31 is designed with a cone angle which is equal to the seat angle of the valve seat 27.
  • a frusto-conical transition surface 40 is present between the shaft 35 and the sealing surface 30 .
  • the cone angle of the transition surface 40 and the seat angle of the valve seat 27 enclose an angle of 2 °.
  • the angular difference is raised to 20 °. In experiments, at angular differences of between 2 ° and 20 °, preferably at 10 °, has set a very good training of small droplets during the injection of fuel.
  • the inventive combination of the seat angle in a range between 55 ° and 75 ° and the angular difference in a range between 2 ° and 20 °, has also give a very good training of small droplets when injecting fuel.
  • the wear behavior of the injection valve 9 according to the invention can be improved if necessary by the diameter of the valve seat 27 and correspondingly also of the valve plate 37 is increased. Then there is a larger sealing surface 30 between the valve disk 31 and the seat surface 29 of the valve seat 27 is available.
  • the upper side of the valve disk 31 in cross-section or in longitudinal section has a circular arc-shaped curved course.
  • the radius r of the arcuately curved upper side of the valve disk 31 and its position are selected such that the valve disk 31 rests tangentially on the seat surface 29 of the valve seat 27 in regions. There then forms the sealing surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'injection (9) pour un système de post-traitement de gaz d'échappement, qui présente des avantages en termes de qualité du jet et de durée de vie par rapport aux soupapes d'injection classiques disponibles sur le marché.
PCT/EP2009/066024 2009-01-09 2009-11-30 Soupape d'injection et système de dosage pour un système de post-traitement de gaz d'échappement WO2010079012A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102009000106.9 2009-01-09
DE102009000106 2009-01-09
DE102009000509.9 2009-01-30
DE102009000509A DE102009000509A1 (de) 2009-01-09 2009-01-30 Einspritzventil und Dosiersystem für eine Abgasnachnbehandlungseinrichtung

Publications (1)

Publication Number Publication Date
WO2010079012A1 true WO2010079012A1 (fr) 2010-07-15

Family

ID=42243511

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP2009/066021 WO2010079010A1 (fr) 2009-01-09 2009-11-30 Soupape d'injection pour un système de post-traitement de gaz d'échappement
PCT/EP2009/066024 WO2010079012A1 (fr) 2009-01-09 2009-11-30 Soupape d'injection et système de dosage pour un système de post-traitement de gaz d'échappement

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/066021 WO2010079010A1 (fr) 2009-01-09 2009-11-30 Soupape d'injection pour un système de post-traitement de gaz d'échappement

Country Status (2)

Country Link
DE (2) DE102009000509A1 (fr)
WO (2) WO2010079010A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011075591A1 (de) 2011-05-10 2012-11-15 Robert Bosch Gmbh Vorrichtung zum Einspritzen von Kraftstoff in ein Abgasnachbehandlungssystem
EP2602476A1 (fr) * 2011-12-07 2013-06-12 Continental Automotive GmbH Moyen d'ensemble formant soupape pour soupape d'injection et soupape d'injection
DE102016118043A1 (de) * 2016-09-23 2018-03-29 Eberspächer Exhaust Technology GmbH & Co. KG Abgasreinigungseinrichtung und Düse für dieselbe
DE102017119887A1 (de) 2017-08-30 2019-02-28 Man Truck & Bus Ag Ventil für einen Verbrennungsmotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5685492A (en) * 1990-01-26 1997-11-11 Orbital Engine Company (Australia) Pty. Limited Fuel injector nozzles
WO2000053922A1 (fr) * 1999-03-12 2000-09-14 Outboard Marine Corporation Injecteur pour moteurs a combustion interne et son procede de realisation
EP1655482A1 (fr) * 2004-11-04 2006-05-10 Siemens Aktiengesellschaft Soupape pour injecter de carburant
WO2007109233A1 (fr) * 2006-03-17 2007-09-27 Continental Automotive Systems Us, Inc. Structure de dosage d'échappement de système diesel

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972387C (de) * 1953-04-15 1959-07-09 Daimler Benz Ag Kraftstoffeinspritzduese mit Drallwirkung
DE3602956A1 (de) * 1986-01-31 1987-08-06 Vdo Schindling Elektromagnetisch betaetigbares kraftstoffeinspritzventil
HU208566B (en) 1990-01-26 1993-11-29 Orbital Eng Pty Fuel injecting device for internal combustion engines
JPH08226363A (ja) 1995-02-20 1996-09-03 Zexel Corp 燃料噴射ノズル
DE19639149C1 (de) * 1996-09-24 1998-02-19 Daimler Benz Ag Kraftstoffeinspritzdüse
DE19947196A1 (de) 1999-10-01 2001-04-05 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE10000575A1 (de) * 2000-01-10 2001-07-19 Bosch Gmbh Robert Einspritzdüse
JP4378638B2 (ja) * 2005-03-07 2009-12-09 株式会社デンソー 燃料噴射弁
DE102005037150A1 (de) 2005-08-06 2007-02-08 Purem Abgassysteme Gmbh & Co. Kg Vorrichtung zur Dosierung eines Reduktionsmittels
DE102006057425A1 (de) 2006-05-23 2007-11-29 Robert Bosch Gmbh Vorrichtung zur Regeneration, zur Temperaturbeaufschlagung und/oder zum Thermomanagement, zugehöriges Einspritzventil und Verfahren
US8122707B2 (en) 2007-06-01 2012-02-28 GM Global Technology Operations LLC Injection anti-coking system for particulate filters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5685492A (en) * 1990-01-26 1997-11-11 Orbital Engine Company (Australia) Pty. Limited Fuel injector nozzles
WO2000053922A1 (fr) * 1999-03-12 2000-09-14 Outboard Marine Corporation Injecteur pour moteurs a combustion interne et son procede de realisation
EP1655482A1 (fr) * 2004-11-04 2006-05-10 Siemens Aktiengesellschaft Soupape pour injecter de carburant
WO2007109233A1 (fr) * 2006-03-17 2007-09-27 Continental Automotive Systems Us, Inc. Structure de dosage d'échappement de système diesel

Also Published As

Publication number Publication date
DE102009002484B4 (de) 2023-08-03
DE102009002484A1 (de) 2010-07-15
DE102009000509A1 (de) 2010-07-15
WO2010079010A1 (fr) 2010-07-15

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