EP2825738A1 - Einspritzvorrichtung - Google Patents
EinspritzvorrichtungInfo
- Publication number
- EP2825738A1 EP2825738A1 EP13700176.4A EP13700176A EP2825738A1 EP 2825738 A1 EP2825738 A1 EP 2825738A1 EP 13700176 A EP13700176 A EP 13700176A EP 2825738 A1 EP2825738 A1 EP 2825738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- injection
- cooling plate
- injection device
- compressed air
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 66
- 239000007924 injection Substances 0.000 title claims abstract description 66
- 238000001816 cooling Methods 0.000 claims abstract description 45
- 238000002485 combustion reaction Methods 0.000 claims abstract description 14
- 239000000446 fuel Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 6
- 238000000889 atomisation Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F01N3/0256—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 the fuel being ignited by electrical means
-
- 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
- F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
- F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
- F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
-
- 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
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
-
- 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
- F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
-
- 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
- the invention relates to an injection device for injecting a medium, in particular for injecting fuel into the exhaust gas line of an internal combustion engine for regeneration of a particle filter, having the features of the preamble of claim 1.
- Such an injection device comprises an injection valve and a valve holder for receiving the injection valve.
- the valve holder is penetrated by a bore into which the injection valve can be inserted.
- the valve holder furthermore forms a cavity surrounding the bore, which can be fed with compressed air via a compressed air connection to assist the injection and to cool the injection valve.
- the application of compressed air causes a fine atomization of the medium and thus a spray optimization. If the medium is, for example, fuel, compressed air-assisted fuel injection can result in better atomization of the fuel and thus more efficient particle filter regeneration, which promotes compliance with steadily increasing requirements with regard to permissible exhaust emissions.
- the compressed air can be used to cool the injector. So far, cooling has been achieved by water cooling, as is often the case with fuel injectors, and cooling by means of compressed air can replace water cooling.
- Document EP 1 008 732 A1 describes a device for the after-treatment of exhaust gases of an internal combustion engine operating with excess air, the device comprising a metering device for the controlled introduction of
- the metering device has an injection valve which is encompassed by a double-walled valve receiving body connected directly to the exhaust gas line, with compressed air being able to be injected via an air-pressure generating device into an air gap between an outer wall and an inner wall of the valve-receiving body for cooling the injection valve.
- a conventional low-pressure gasoline injector is used as an injection valve.
- the valve receiving body is firmly connected, for example welded, to the exhaust pipe.
- the present invention seeks to provide an injection device, which can be used variably and also easy and inexpensive to produce.
- an injection device with the features of
- the proposed injection device for injecting a medium in particular for injecting fuel into the exhaust line of an internal combustion engine, comprises an injection valve and a valve holder, wherein the valve holder is penetrated by a bore for receiving the injection valve and forms a bore surrounding the cavity, which in support of Injection and cooling of the injector via a compressed air connection with compressed air is chargeable.
- the cavity is formed as an annular space arranged concentrically to the bore, which is limited on the exhaust gas side by a cooling plate with at least one compressed air outlet opening, wherein the cooling plate is firmly connected to the valve holder.
- the valve holder and the injection valve together form a modular injection device which is suitable both for injecting fuel and for injecting a reducing agent into the exhaust gas line of an internal combustion engine.
- the injection device is thus versatile.
- the valve When used as a fuel injection valve, the valve is preferably designed as a passive valve, which can be controlled via an applied control pressure.
- the modular structure of the injection device allows the replacement of the valves, so that other types of valves can be used.
- the formation of the cavity as an annular space simplifies the manufacture of the valve holder. Because preferably, the annular space on an end face of the
- Valve holder introduced by a material-removing process, such as drilling or milling, or by a shaping process.
- the closing of the annulus is done by placing the cooling plate.
- the valve holder is formed in a flange and has at least one bore for receiving a fastening screw, by means of which the valve holder can be fixed to a housing part of the internal combustion engine or to an exhaust pipe connected to the internal combustion engine.
- the valve holder can therefore be flanged to a housing part or exhaust pipe and fastened by means of the screw in a simple manner.
- the valve holder has in the region of a stop surface a sealing unit, which is guided at least partially over the cooling plate, so that an insulating air gap is formed between the cooling plate and the sealing unit.
- the sealing unit comes to lie in the attachment of the valve holder to a housing part or on an exhaust pipe between the stop surface and the housing part or the exhaust pipe and thus seals the gap between these two components.
- the sealing unit is at least partially passed over the cooling plate away, so this projects in the radial direction relative to the valve longitudinal axis, an air gap between the cooling plate and the sealing unit is formed, which serves as insulation.
- the sealing unit which is at least partially guided over the cooling plate, can be used to guide the compressed air flow.
- the cooling plate is cup-shaped and forms an approach, with which the injection device can be inserted into a housing part or an exhaust pipe.
- the pot shape of the cooling plate allows insertion of the injection valve deep into the exhaust pipe, so that a good spray distribution is effected. If the injection Device comprises a sealing unit which is at least partially guided over the cooling plate away, the shape of the sealing unit for forming a constant air gap between the cooling plate and the sealing unit of the shape of the cooling plate is largely adapted.
- the injection valve inserted into the valve holder at least slightly surmount the cooling plate.
- the cooling plate viewed from the exhaust pipe, lies behind the injection valve.
- the exiting the cooling plate compressed air can capture in this way the entire spray cone of the medium to be injected, so that a fine atomization is achieved.
- the compressed air preferably mixed outside of the injection valve and outside of the valve holder with the medium to be injected.
- the injection valve for releasing at least one injection opening has an outwardly opening valve closing element.
- an outwardly opening valve closing element reliable opening of the valve is permanently ensured since any deposits in the opening area are blown up with each opening stroke of the valve closing element.
- the cooling plate has a plurality of compressed air outlet openings, which are arranged annularly, preferably at the same distance from each other and / or at the same distance from the injection valve.
- FIG. 1 a schematic representation of an injection device according to the invention
- FIG. 2 shows a detail of Fig. 1 in an enlarged view. Detailed description of the drawing
- the injector according to the invention shown schematically in FIG. 1 serves to inject fuel into the exhaust line 1 of an internal combustion engine. It comprises an outwardly opening injection valve 2, which is received in a bore 4 of a valve holder 3 and connected via the valve holder 3 with a housing part 10 of the internal combustion engine.
- the valve holder 3 is formed for this purpose flange-shaped and has holes 9 for receiving fastening screws, by means of which the valve holder 3 on the housing part 10 can be fixed.
- the injection device further comprises a sealing unit 12 which is placed between the stop surface 1 1 and the housing part 10.
- the bore 4 receiving the injection valve 2 is surrounded by an annular space 5 formed in the valve holder 3, which can be charged with compressed air via at least one compressed-air connection 6.
- an annular space 5 formed in the valve holder 3, which can be charged with compressed air via at least one compressed-air connection 6.
- only one compressed-air connection 6 can be provided or the other connection - if present, for example when using a valve holder 3, which is alternatively connectable to a water-cooling circuit - shut down.
- the annular space 5 extends to the exhaust gas side end face of the valve holder 3 and is covered by a cooling plate 7 to the exhaust line 1 out.
- the cooling plate 7 is fixedly connected to the valve holder 3 and has a plurality of compressed air outlet openings 8 which are arranged in an annular manner around the injection valve 2 received in the bore 4.
- the cooling plate 7 is cup-shaped, so that it forms over the stop surface 1 1 projecting lug 14 which projects into the exhaust system 1 of the internal combustion engine.
- the cooling plate 7 is also still surmounted by the injection valve 2 in such a way that a valve closing element 15 of the outwardly opening injection valve 2 - seen from the exhaust line 1 - comes to lie in front of the cooling plate 7. In this way, the complete, over at least one injection port (not shown) exiting spray is detected and atomized by the compressed air, whereby a good spray treatment is ensured.
- the arranged between the abutment surface 1 1 and the housing part 10 sealing unit 12 is guided over the cooling plate 7 away, so that between the cooling plate 7 and the sealing unit 12, an air gap 13 is formed, which acts insulating, so that in the air gap 13, a lower temperature as in the exhaust line 1 prevails.
- the sealing unit 12 is shaped such that it directs the compressed air in the direction of the spray jet.
- the flow pattern of the compressed air discharged through the compressed air outlet openings 8 compressed air is shown by an arrow with the reference numeral 16 in FIG.
- the compressed air impinges in the exhaust line 1 on the spray jet or spray cone 17, which is characterized by a spray angle ⁇ .
- the spray angle ⁇ depends i.a. from the specific design of at least one injection port (not shown) from.
- the position of the compressed air outlet openings 8 in the cooling plate 7 and their number n is adapted to the requirements. The same applies to the diameter d of the compressed air outlet openings 8, which are designed here as throttle bores.
- the injection device according to the invention can also serve for the injection of another medium, for example a reducing agent.
- the device is attached to an exhaust pipe connected to the internal combustion engine. Further, possible modifications may relate in particular to the specific configuration of the cooling plate and / or the sealing unit.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210203957 DE102012203957A1 (de) | 2012-03-14 | 2012-03-14 | Einspritzvorrichtung |
PCT/EP2013/050481 WO2013135399A1 (de) | 2012-03-14 | 2013-01-11 | Einspritzvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2825738A1 true EP2825738A1 (de) | 2015-01-21 |
EP2825738B1 EP2825738B1 (de) | 2016-10-05 |
Family
ID=47553090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13700176.4A Active EP2825738B1 (de) | 2012-03-14 | 2013-01-11 | Einspritzvorrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2825738B1 (de) |
CN (1) | CN104169535B (de) |
DE (1) | DE102012203957A1 (de) |
WO (1) | WO2013135399A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105065094B (zh) * | 2015-08-12 | 2019-01-11 | 清华大学苏州汽车研究院(吴江) | 一种scr尿素喷嘴冷却固定装置 |
CN113292072A (zh) * | 2020-03-11 | 2021-08-24 | 内蒙古浦瑞芬环保科技有限公司 | 空气喷射装置及活性炭生产装置 |
US11781457B2 (en) | 2022-02-25 | 2023-10-10 | Deere & Company | Diesel exhaust fluid injection shield and diesel exhaust fluid injection system |
US11732630B1 (en) | 2022-02-25 | 2023-08-22 | Deere & Company | Diesel exhaust fluid injection shield and diesel exhaust fluid injection system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19856366C1 (de) | 1998-12-07 | 2000-04-20 | Siemens Ag | Vorrichtung und Verfahren zum Nachbehandeln von Abgasen einer mit Luftüberschuß arbeitenden Brennkraftmaschine |
DE102006061730A1 (de) * | 2006-12-28 | 2008-07-03 | Robert Bosch Gmbh | SCR-Injektionseinrichtung |
US7958721B2 (en) * | 2007-06-29 | 2011-06-14 | Caterpillar Inc. | Regeneration system having integral purge and ignition device |
DE102009005528A1 (de) * | 2009-01-20 | 2010-07-22 | Albonair Gmbh | Zweistoffdüse |
DE102009028030A1 (de) * | 2009-07-27 | 2011-02-03 | Robert Bosch Gmbh | Montageeinheit zur Befestigung eines Einspritzorgans an einem Abgasstrang und Abgasnachbehandlungsanordnung |
-
2012
- 2012-03-14 DE DE201210203957 patent/DE102012203957A1/de not_active Withdrawn
-
2013
- 2013-01-11 EP EP13700176.4A patent/EP2825738B1/de active Active
- 2013-01-11 WO PCT/EP2013/050481 patent/WO2013135399A1/de active Application Filing
- 2013-01-11 CN CN201380013581.6A patent/CN104169535B/zh active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2013135399A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013135399A1 (de) | 2013-09-19 |
EP2825738B1 (de) | 2016-10-05 |
CN104169535A (zh) | 2014-11-26 |
CN104169535B (zh) | 2018-07-17 |
DE102012203957A1 (de) | 2013-09-19 |
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