US20090282814A1 - Method and device for cleaning valves - Google Patents
Method and device for cleaning valves Download PDFInfo
- Publication number
- US20090282814A1 US20090282814A1 US12/301,678 US30167807A US2009282814A1 US 20090282814 A1 US20090282814 A1 US 20090282814A1 US 30167807 A US30167807 A US 30167807A US 2009282814 A1 US2009282814 A1 US 2009282814A1
- Authority
- US
- United States
- Prior art keywords
- injection port
- fuel
- port disk
- injection valve
- injection
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract 6
- 238000004140 cleaning Methods 0.000 title 1
- 238000002347 injection Methods 0.000 claims abstract description 107
- 239000007924 injection Substances 0.000 claims abstract description 107
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 239000000446 fuel Substances 0.000 claims abstract description 50
- 238000002485 combustion reaction Methods 0.000 claims abstract description 20
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 21
- 230000001590 oxidative effect Effects 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 12
- 239000004071 soot Substances 0.000 description 12
- 239000007921 spray Substances 0.000 description 8
- 230000035508 accumulation Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000001089 thermophoresis Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
-
- 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
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
- F01N2610/102—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance after addition to exhaust gases, e.g. by a passively or actively heated surface in the exhaust conduit
-
- 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 spacing 56 with which the at least one heating wire covers the first end surface 38 of the injection port disk 32 , for example in a meandering fashion—results in an open flow cross-section to the individual openings 48 embodied in the injection port disk 32 .
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)
Abstract
The invention relates to a method and a device for the catalytic combustion of fuel which is metered into the exhaust manifold of an internal combustion engine by an injection valve. Preferably, an oxidation catalyst is positioned in the exhaust manifold of the internal combustion engine. The metered fuel is atomized in an exhaust gas flow by the injection valve. An end of the invention valve facing the direction of the exhaust gas flow in an exhaust pipe is continuously or intermittently heated by a heating device. Alternatively, an end of the injection valve which is thermally decoupled from the injection valve is directly heated by the exhaust gas flow.
Description
- DE 101 18 164 A1 has disclosed a fuel injection valve for fuel injection systems of internal combustion engines. The fuel injection valve has an actuator and a valve needle, which is operationally connected to the actuator and is acted on in the closing direction by a return spring, for the confirmation of a valve closure member. This cooperates with a valve seat surface embodied on a valve seat body to form a sealing seat. Downstream of the valve seat body, an injection port disk is provided; the injection port disk is embodied as arched in a domed fashion in a flow direction of the fuel.
- Because of the stricter requirements of exhaust standards, particulate filters, in particular diesel particulate filters, are being used in autoignition internal combustion engines. The particulate filters hold back soot particles contained in the exhaust of an autoignition internal combustion engine and over the operating time of the autoignition internal combustion engine, these particles accumulate in the filter pockets of the diesel particulate filter. In order to regenerate particulate filters of autoignition internal combustion engines, the exhaust temperature is usually raised through steps taken with the engine. If the exhaust temperature increase required to burn away the soot particles cannot be achieved solely through steps taken with the engine, then an injector additionally provided in the exhaust line of the autoignition internal combustion engine meters fuel into the exhaust, which is catalytically combusted in an oxidizing converter. This discharges the heat required for the temperature increase. The HCI system (hydrocarbon injection) was developed for the additional introduction of fuel into the exhaust line of internal combustion engines. A good catalytic combustion of the fuel metered into the exhaust in the region of the oxidizing converter requires a fine distribution of the fuel that has been additionally metered in. The atomized spray should ideally be composed of evenly distributed small droplets. The required spray quality can be achieved by means of multiport nozzles that meter the additionally metered-in fuel into the exhaust through a plurality of individual ports. These multiport nozzles have a large number of small and extremely small openings, but fluid residues remaining in them and soot from the exhaust that accumulates in the multiport nozzle tends to collect in the individual ports over the operating duration of the multiport nozzle, gradually causing them to clog. As a result, there is a decrease in the quantity of fuel additionally metered into the exhaust and in particular, there is a drastic decrease in the fine droplet distribution within the atomized spray. This in turn significantly impairs the exhaust conditioning, thus also significantly impairing the effectiveness of the temperature increase produced by the oxidizing converter.
- According to the embodiment proposed by the invention, a heating device is provided on an additional injector that introduces an atomized spray of finely distributed droplets of liquid fuel into the exhaust. Through a periodic activation of the heating device, it is possible to produce a regular cleansing combustion and evaporation, respectively, of soot and fuel accumulations in a multipoint nozzle, thus permitting an operation of the additional injector that is constant over the long term.
- The multiport nozzle of the additional fuel injector, which is also referred to as an injection port disk, has at least one heating wire integrated into it. The heating wire, which constitutes the additional heating device, can on one hand, extend on the outside. i.e. on the side of the multiport nozzle or injection port disk oriented toward the flow conduit. In another embodiment variant, the at least one heating wire constituting the heating device can also be situated on the inside, i.e. on the side of the injection port disk or multiport nozzle oriented away from the exhaust flow and therefore inside the injector body of the injector for introducing additional fuel into the exhaust line. At regular intervals, the heating device raises the temperature of the injection port disk or multiport nozzle in direct proximity to the injection ports to a temperature greater than 600° C. so that adhering fuel residues and soot particles evaporate and burn, respectively.
- In order to reduce the thermal load of the fuel injector in the exhaust line of the internal combustion engine, particularly in its inner chamber, the heating device can be insulated toward the inside by means of a thermal insulation.
- After the fuel mist of an is metered in, it is also possible, for particulate filter regeneration purposes, to briefly raise the temperature of the injection port disk or multiport nozzle to a temperature of for example 400° C. in order to quickly evaporate adhering fuel residues. Furthermore, the embodiment proposed according to the invention also makes it possible to produce a long-term temperature increase in order to counteract or entirely prevent the diffuse accumulation of soot particles due to thermophoresis.
- Another additional measure in the form of a thermal insulation between the injection port disk or multiport nozzle and the injector body of the injector is comprised of carrying out a thermal decoupling of the multiport nozzle or injection port disk from the injector body of the fuel injector. Whereas the valve tip in the region of the multiport nozzle or injection port disk is exposed to the hot exhaust flow, the thermal insulation of the injection port disk prevents the heat to which it is exposed from being transmitted into the interior of the injector body. Ideally, the injection port disk or multiport nozzle assumes the temperature of the exhaust on the side oriented toward the exhaust flow.
- The invention will be described in greater detail below in conjunction with the drawings.
-
FIG. 1 is a schematic depiction of the exhaust line of an autoignition internal combustion engine in which, upstream of an oxidizing converter, a location is provided for the metering-in of additional fuel into the exhaust flow, -
FIG. 2 shows a first embodiment variant of an end of an additional fuel injector oriented toward the exhaust flow, -
FIG. 3 shows another embodiment variant of the end of the additional fuel injector oriented toward the exhaust flow, and -
FIG. 4 shows an embodiment variant of the fuel injector that introduces additional fuel into the exhaust flow, equipped with thermal insulation. -
FIG. 1 is a schematic depiction of the exhaust line of an autoignition internal combustion engine; the exhaust line contains an oxidizing converter that is preceded by a location for the metering-in of additional exhaust. - In the
exhaust line 10 of the autoignition internal combustion engine, anexhaust pipe 12 extends, via which the exhaust of the autoignition internal combustion engine flows to an oxidizingconverter 18. Theexhaust pipe 12 is delimited by apipe wall 20. An inflow end of theexhaust pipe 12 is labeled with thereference numeral 14 and an outflow end of the exhaust flow is labeled with thereference numeral 16. Theoutflow end 16 of theexhaust pipe 12 constitutes the inflow end of the oxidizingconverter 18. Theexhaust pipe 12 is embodied as symmetrical to its axis ofsymmetry 22. - An
injection valve 24 is integrated into thepipe wall 20 of theexhaust pipe 12. Theinjection valve 24 is connected via asupply line 25 for example to the fuel tank of the vehicle equipped with the autoignition internal combustion engine and is supplied with fuel via this line. - The
injection valve 24 has avalve body 26 that passes through thepipe wall 20 of theexhaust pipe 12 and protrudes partway into the exhaust flow passing through theexhaust pipe 12. Inside thevalve body 26, there is avalve piston 28, which is only shown schematically here and which is able to move in the vertical direction indicated by the double arrow provided inFIG. 1 . Thevalve piston 28 cooperates with avalve seat 30 embodied in thevalve body 26. Below thevalve seat 30 in thevalve body 26 of theinjection valve 24 is a cavity labeled with thereference numeral 36, which is delimited by thevalve seat 30 and by aninjection port disk 32. - By means of the
injection port disk 32, in which multitude of extremely small openings are provided for producing a finely distributed atomized spray, additional fuel, indicated by thereference numerals 34, is introduced into the exhaust flow posing theexhaust pipe 12. The smaller the droplet distribution is in the atomized spray produced by theinjection port disk 32, the better the mixture of the additional fuel with the exhaust flow is and therefore the more uniform the combustion that can be achieved in the oxidizingconverter 18. -
FIG. 2 shows a section through the end of the injection valve shown inFIG. 1 that is oriented toward the exhaust flow. -
FIG. 2 shows that the verticallymovable valve piston 28 is situated inside thevalve body 26 of theinjection valve 24 and cooperates with avalve seat 30 likewise embodied inside thevalve body 26. On thevalve seat 30, an opening is provided, which can, for example, be embodied as circular and can be closed by the end of thevalve piston 28 oriented toward thevalve seat 30. Depending on the stroke travel of thevalve piston 28, the opening in thevalve seat 30 is completely or partially opened so that additional fuel flows out from the inside of thevalve body 26, via theopen valve seat 30, and to thecavity 36. - The
valve body 26 is delimited by aninjection port disk 32 that is preferably joined in an integral fashion to thevalve body 26 at joiningpoints 54. Theinjection port disk 32 preferably has a multitude ofindividual openings 48. Thejoining points 54 between thevalve body 26 and theinjection port disk 32 can, for example, be embodied in the form of welding seams; it is alternatively also possible for theinjection port disk 32 to be screwed into thevalve body 26 or for thevalve body 26 to be embodied in the form of a one-piece component with an integratedinjection port disk 32. -
FIG. 2 shows that a heating device—embodied here in the form of aheating wire 44—is associated with the outside of theinjection port disk 32, i.e. the side of theinjection port disk 32 oriented toward the exhaust flow in the depiction inFIG. 1 . A spacing that corresponds to the distance betweenindividual heating wires 44 of the heating device is labeled with thereference numeral 56 in the depiction inFIG. 2 . The at least oneheating wire 44 of the heating device preferably extends so that the at least oneheating wire 44 extends over the solid material of theinjection port disk 32 and does not cover theopenings 48 embodied in theinjection port disk 32. Activation of the heating device, constituted by theheating wires 44 shown inFIG. 2 , produces a heating of theinjection port disk 32 so that fuel remaining in theinjection openings 48 evaporates and soot particles that have accumulated on theinjection port disk 32 in the vicinity of theindividual openings 48 are burned away. The first embodiment variant of the heating device shown inFIG. 2 provides long-lasting assurance of the quality of the atomized spray of additional fuel produced by theinjection valve 24 because the geometry of theindividual openings 48 in theinjection port disk 32 is not impaired by fuel residues or soot particles that clog theindividual openings 48. The thickness of theinjection port disk 32 is labeled with thereference numeral 46. Thecavity 36 in theinjection valve 24 is defined by afirst end surface 38 of theinjection port disk 32, aninner wall 42 of thevalve body 26, and thevalve seat 30 with the opening provided in it. In the embodiment variant shown inFIG. 2 , the heating device is situated on asecond end surface 40 of theinjection port disk 32, i.e. on its surface oriented toward the exhaust flow. -
FIG. 3 shows another embodiment variant of the outflow end of an injection valve that meters additional fuel into the exhaust flow. - By contrast with the first embodiment variant of the
injection valve 24 shown inFIG. 2 , the heating device, including at least oneheating wire 44, is situated on the inside of theinjection port disk 32, in this case, on thefirst end surface 38 inside thecavity 36 in thevalve body 26. According to the embodiment variant of the heating device of theinjection valve 24 shown inFIG. 3 , the at least oneheating wire 44 extends along thefirst end surface 38 of theinjection port disk 32 arranged in aspacing 56. In the embodiment variant shown inFIG. 3 , the provision of an inner heating device, i.e. one situated inside thecavity 36 of thevalve body 26 and including at least oneheating wire 44, achieves the fact that the heating device itself is not contaminated by soot particles contained in the exhaust flow of the autoignition internal combustion engine. The spacing 56—with which the at least one heating wire covers thefirst end surface 38 of theinjection port disk 32, for example in a meandering fashion—results in an open flow cross-section to theindividual openings 48 embodied in theinjection port disk 32. - When the at least one
heating wire 44 of the heating device situated against theinjection port disk 32 is supplied with current until it reaches a temperature Tmax of approximately 600° C., the fuel remaining in theindividual openings 48 evaporates and particles, e.g. soot particles, situated in theindividual openings 48 of theinjection port disk 32 are burned away. The cross-section through which the additional fuel is injected into the exhaust flow is therefore retained. Furthermore, the injection port geometry remains unaltered over the operating time of theinjection valve 24 so that there is no adverse effect on the region in which the atomized spray is introduced into the exhaust flow. - Also in the second embodiment variant shown in
FIG. 3 of theinjection valve 24 shown inFIG. 1 , thevalve seat 30 is embodied inside thevalve body 26 and its opening can be either completely opened, completely closed, or partially opened by thevalve piston 28 as a function of its vertical stroke. According to the second embodiment variant of theinjection valve 24 shown inFIG. 3 , theinjection port disk 32 can be either integrally joined to thevalve body 26 at the joiningpoints 54 or can be fitted into it in a nonpositive, fictionally engaging fashion, e.g. be shrink-fitted into it. -
FIG. 4 shows another embodiment variant of theinjection valve 24 that is depicted only in schematic form inFIG. 1 . -
FIG. 4 shows that athermal insulation 50 is accommodated in thecavity 36 between thevalve seat 30 and theinjection port disk 32. Thethermal insulation 50 separates theinjection port disk 32 situated at the exhaust flow end from the inside of thevalve body 26. Thethermal insulation 50 includesindividual openings 52 that are embodied with a spacing 58 so that theopenings 52 of thethermal insulation 50 are aligned with theindividual openings 48 in theinjection port disk 32. This permits an unhindered flow of the additional fuel stored in thevalve body 26 to theinjection port disk 32 when thevalve seat 30 is open. In the embodiment variant according toFIG. 4 , the heating device that is constituted by the at least oneheating wire 44 is eliminated. - The embodiment variants of the heating device shown in
FIGS. 2 and 3 , which is represented by the at least oneheating wire 44, can be supplied with current at regular intervals so that the temperature of theinjection port disk 32 in direct proximity to theindividual openings 48 rises to a temperature level of greater than 600° C. At this temperature, fuel residues that hinder the emerging flow of fuel in theindividual openings 48 evaporate. In addition, soot particles that have accumulated in the flow cross-sections of theindividual openings 48 burn away at this temperature level. If the heating device composed of the at least oneheating wire 44 is situated resting against thefirst end surface 38 as shown inFIG. 3 or against thesecond end surface 40 as shown inFIG. 2 , it is then possible, although this is not shown inFIGS. 2 and 3 , for athermal insulation 50 to be accommodated in thecavity 36 of thevalve body 26, as in the exemplary embodiment show inFIG. 4 . - In addition to a uniform tempering of the
injection port disk 32 through a constant supply of current to the heating device, which includes at least oneheating wire 44, it is also possible, shortly after the metering-in of fuel for particulate filter regeneration, to increase the temperature of theinjection port disk 32 to a temperature level of approximately 400° C., for example, in order to rapidly evaporate fuel residues adhering in theindividual openings 48. In addition, it is also conceivable for there to be a longer-lasting temperature increase in order to counteract the diffuse accumulation of soot particles by thermophoresis and in the ideal case, to prevent this entirely. - The exemplary embodiment shown in
FIG. 4 , in order to increase the temperature of theinjection port disk 32, a heating device, for example including at least oneheating wire 44, can also be completely eliminated if the temperature increase of theinjection port disk 32 is produced entirely by the exhaust flow passing through theexhaust pipe 12. In this case, thethermal insulation 50 decouples the inside of thevalve body 26 of theinjection valve 24 from theinjection port disk 32. Preferably, thethermal insulation 50 is accommodated in thecavity 36 in thevalve body 26, which cavity is delimited by thevalve seat 30 on the one hand and by theinjection port disk 32 on the other. Since theinjection port disk 32 is exposed to the hot exhaust flow and is therefore heated very powerfully, thethermal insulation 50 situated in thecavity 36 prevents the temperature level of theinjection port disk 32 from acting on thevalve body 26 of theinjection valve 24. In addition, because of thethermal insulation 50, the heating action of the exhaust flow on theinjection port disk 32 remains limited and after a corresponding heating time, theinjection port disk 32 also actually assumes the temperature of the exhaust flow. In an embodiment variant not shown in the drawings, thethermal insulation 50 can also be accommodated on the side of theinjection port disk 32 oriented toward the exhaust flow. In this case, thethermal insulation 50 can be embodied by means of a coating composed of a thermal ceramic thin layer, it being necessary to assure that this layer has as little influence as possible on the exhaust flow inside theexhaust pipe 12. Thethermal insulation 50 embodied in the form of a coating composed of a thermal ceramic thin layer is applied to theinjection port disk 32 so that theinjection openings 48 provided in it are not covered by the thermal ceramic thin layer.
Claims (12)
1-10. (canceled)
11. A method for catalytic combustion of fuel, which fuel an injection valve has metered into an exhaust line of an internal combustion engine, through the use of an oxidizing converter, comprising the steps of:
a) the injection valve atomizing the metered-in fuel in an exhaust flow; and
b1) a heating device continuously or periodically heating an end of the injection valve oriented toward the exhaust flow in an exhaust pipe; or
b2) heating an end of the injection valve that is thermally decoupled from the injection valve directly by the exhaust flow.
12. The method as reciting claim 11 , wherein the metered-in fuel is atomized by means of an injection port disk accommodated at the end of the injection valve oriented toward the exhaust flow.
13. The method as reciting claim 11 , wherein in step b1), the end of the injection valve oriented toward the exhaust flow is heated at regular intervals to a temperature level of approximately 600° C. or is heated to a temperature level of approximately 400° C. after additional fuel has been metered-in.
14. The method as reciting claim 11 , wherein in step b2), the thermal decoupling of the end of the injection valve is achieved by means of a thermal insulation.
15. A device for catalytic combustion of fuel, which fuel an injection valve has metered into an exhaust line of an internal combustion engine, comprising:
an injection port disk equipped with a plurality of individual openings being situated at an end of the injection valve oriented toward exhaust flow in the exhaust line, the injection port disk being associated with a heating device, which heating device includes at least one heating wire, or the injection port disk being thermally decoupled from a valve body of the injection valve by means of a thermal insulation.
16. The device as recited in claim 15 , wherein the at least one heating wire extends along one of two surfaces of the injection port disk.
17. The device as recited in claim 16 , wherein the at least one heating wire is accommodated inside a cavity of the injection valve and is thermally insulated from the valve body of the injection valve.
18. The device as recited in claim 16 , wherein the at least one heating wire extends in a meandering fashion on one of the surfaces of the injection port disk.
19. The device as recited in claim 15 , wherein the thermal insulation is situated in a cavity above the injection port disk in the valve body.
20. The device as recited in claim 16 , wherein individual coils of the at least one heating wire extend with a spacing, which permits passage of fuel through individual openings of the injection port disk, or through openings of the thermal insulation are aligned with individual openings of the injection port disk.
21. The device as recited in claim 19 , wherein individual coils of the at least one heating wire extend with a spacing, which permits passage of fuel through individual openings of the injection port disk, or through openings of the thermal insulation are aligned with individual openings of the injection port disk.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE102006025332.9 | 2006-05-31 | ||
DE102006025332A DE102006025332A1 (en) | 2006-05-31 | 2006-05-31 | Method and device for cleaning valves |
PCT/EP2007/053218 WO2007137897A1 (en) | 2006-05-31 | 2007-04-03 | Method and device for cleaning valves |
Publications (1)
Publication Number | Publication Date |
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US20090282814A1 true US20090282814A1 (en) | 2009-11-19 |
Family
ID=38134180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/301,678 Abandoned US20090282814A1 (en) | 2006-05-31 | 2007-04-03 | Method and device for cleaning valves |
Country Status (4)
Country | Link |
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US (1) | US20090282814A1 (en) |
EP (1) | EP2029866B1 (en) |
DE (2) | DE102006025332A1 (en) |
WO (1) | WO2007137897A1 (en) |
Cited By (3)
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US20130061948A1 (en) * | 2010-05-26 | 2013-03-14 | Robert Bosch Gmbh | Valve arrangement for metering a fluid medium in an exhaust line of an internal combustion engine |
US20190136735A1 (en) * | 2016-06-30 | 2019-05-09 | Continental Automotive Gmbh | Device and method for metering water or an aqueous solution in a combustion system |
US20210301699A1 (en) * | 2020-03-31 | 2021-09-30 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive exhaust aftertreatment system with doser |
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US8484947B2 (en) * | 2007-03-02 | 2013-07-16 | Caterpillar Inc. | Fluid injector having purge heater |
US7958721B2 (en) * | 2007-06-29 | 2011-06-14 | Caterpillar Inc. | Regeneration system having integral purge and ignition device |
US8281570B2 (en) | 2007-08-09 | 2012-10-09 | Caterpillar Inc. | Reducing agent injector having purge heater |
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US20050120708A1 (en) * | 2003-12-03 | 2005-06-09 | Marco Ranalli | Motor vehicle equipped with a diesel propulison engine |
US20060021331A1 (en) * | 2004-08-02 | 2006-02-02 | Cizeron Joel M | Pre-combustors for internal combustion engines and systems and methods therefor |
US20060107655A1 (en) * | 2004-11-24 | 2006-05-25 | Robert Hanitzsch | Exhaust system |
US20060118651A1 (en) * | 2004-12-02 | 2006-06-08 | Nissan Motor Co., Ltd. | Fuel injector |
US20070193252A1 (en) * | 2006-02-23 | 2007-08-23 | Mckinley Thomas L | Exhaust aftertreatment device with star-plugged turbulator |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19855385A1 (en) * | 1998-12-01 | 2000-06-08 | Bosch Gmbh Robert | Device for the aftertreatment of exhaust gases from an internal combustion engine |
DE10118164B4 (en) | 2001-04-11 | 2007-02-08 | Robert Bosch Gmbh | Fuel injector |
DE10330913B4 (en) * | 2003-07-04 | 2016-02-04 | Robert Bosch Gmbh | Method and device for metering reducing agent to the exhaust gas of an internal combustion engine |
DE10342003A1 (en) * | 2003-09-05 | 2005-03-31 | Robert Bosch Gmbh | Apparatus for processing a reducing agent precursor solution for exhaust aftertreatment |
DE102005044780A1 (en) * | 2005-09-20 | 2007-03-29 | Arvinmeritor Emissions Technologies Gmbh | Injection nozzle with heating element and method for introducing an oxidizable fluid into an exhaust system upstream of a catalyst or filter |
-
2006
- 2006-05-31 DE DE102006025332A patent/DE102006025332A1/en not_active Withdrawn
-
2007
- 2007-04-03 DE DE502007004731T patent/DE502007004731D1/en active Active
- 2007-04-03 WO PCT/EP2007/053218 patent/WO2007137897A1/en active Application Filing
- 2007-04-03 US US12/301,678 patent/US20090282814A1/en not_active Abandoned
- 2007-04-03 EP EP07727689A patent/EP2029866B1/en not_active Expired - Fee Related
Patent Citations (14)
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US4627405A (en) * | 1983-05-13 | 1986-12-09 | Robert Bosch Gmbh | Apparatus for injecting fuel into combustion chambers |
US5609297A (en) * | 1994-04-12 | 1997-03-11 | Texas Instruments Incorporated | Fuel atomization device |
US5665318A (en) * | 1994-10-12 | 1997-09-09 | Robert Bosch Gmbh | Arrangement for treatment of exhaust gases for a compression-ignition internal combustion engine |
US5771689A (en) * | 1996-06-26 | 1998-06-30 | Robert Bosch Gmbh | Pipe evaporator for feeding additional fuel into the exhaust gas |
US20010052553A1 (en) * | 2000-06-19 | 2001-12-20 | Takayuki Hokao | Commutator of motor and method of manufacturing the same |
US6814309B2 (en) * | 2000-11-11 | 2004-11-09 | Robert Bosch Gmbh | Fuel injector |
US20020166537A1 (en) * | 2001-05-09 | 2002-11-14 | Ronald Shinogle | Fuel injector with non-metallic tip insulator |
US20030033800A1 (en) * | 2001-08-03 | 2003-02-20 | C.R.F. Societa' Consortile Per Azioni | Method of initiating regeneration of a particulate filter for a direct-injection diesel engine with a common rail injection system |
US20040045284A1 (en) * | 2001-08-18 | 2004-03-11 | Wolfgang Ripper | Method and device for storing and dosing a reducing agent |
US20050120708A1 (en) * | 2003-12-03 | 2005-06-09 | Marco Ranalli | Motor vehicle equipped with a diesel propulison engine |
US20060021331A1 (en) * | 2004-08-02 | 2006-02-02 | Cizeron Joel M | Pre-combustors for internal combustion engines and systems and methods therefor |
US20060107655A1 (en) * | 2004-11-24 | 2006-05-25 | Robert Hanitzsch | Exhaust system |
US20060118651A1 (en) * | 2004-12-02 | 2006-06-08 | Nissan Motor Co., Ltd. | Fuel injector |
US20070193252A1 (en) * | 2006-02-23 | 2007-08-23 | Mckinley Thomas L | Exhaust aftertreatment device with star-plugged turbulator |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130061948A1 (en) * | 2010-05-26 | 2013-03-14 | Robert Bosch Gmbh | Valve arrangement for metering a fluid medium in an exhaust line of an internal combustion engine |
US8967501B2 (en) * | 2010-05-26 | 2015-03-03 | Robert Bosch Gmbh | Valve arrangement for metering a fluid medium in an exhaust line of an internal combustion engine |
US20190136735A1 (en) * | 2016-06-30 | 2019-05-09 | Continental Automotive Gmbh | Device and method for metering water or an aqueous solution in a combustion system |
US10876452B2 (en) * | 2016-06-30 | 2020-12-29 | Continental Automotive Gmbh | Device and method for metering water or an aqueous solution in a combustion system |
US20210301699A1 (en) * | 2020-03-31 | 2021-09-30 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive exhaust aftertreatment system with doser |
US11319853B2 (en) * | 2020-03-31 | 2022-05-03 | Faurecia Emissions Control Technologies, Usa, Llc | Automotive exhaust aftertreatment system with doser |
Also Published As
Publication number | Publication date |
---|---|
DE102006025332A1 (en) | 2007-12-06 |
DE502007004731D1 (en) | 2010-09-23 |
EP2029866B1 (en) | 2010-08-11 |
WO2007137897A1 (en) | 2007-12-06 |
EP2029866A1 (en) | 2009-03-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROBERT BOSCH GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STEIN, STEFAN;REEL/FRAME:023084/0147 Effective date: 20080311 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |