EP2511512A1 - Spill device - Google Patents
Spill device Download PDFInfo
- Publication number
- EP2511512A1 EP2511512A1 EP12002225A EP12002225A EP2511512A1 EP 2511512 A1 EP2511512 A1 EP 2511512A1 EP 12002225 A EP12002225 A EP 12002225A EP 12002225 A EP12002225 A EP 12002225A EP 2511512 A1 EP2511512 A1 EP 2511512A1
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- EP
- European Patent Office
- Prior art keywords
- fuel
- internal combustion
- combustion engine
- burner
- supply unit
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
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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
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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
- F01N3/08—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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/36—Arrangements for supply of additional 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
Definitions
- Such systems are for. B. known from the DE 10 2008 002 003 , There, a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine is described, wherein the fuel injector is connected via a return line to a reservoir.
- the fuel is branched off before the fuel metering unit (ZME / eng .: FCU) and fed via a fuel line to the metering device of the burner system.
- the inlet for the fuel in the metering device is released and is at the pressure of the low-pressure circuit - generated by the fuel delivery pump - in front of the metering valves.
- the DV2 is then controlled with a low frequency via a software-supported splitting algorithm and thus measures the quantity required for torch start at.
- the DV1 automatically switches on. This ensures through its injected into the exhaust system and on the diesel oxidation catalyst (DOC) reactive amount for the necessary temperature increase for the regeneration of the diesel particulate filter (DPF).
- DOC diesel oxidation catalyst
- the object of the present invention is achieved by a device according to claim 1.
- shut-off device provides a circuit which upon opening the shutoff valve provides for a permanent flow of fuel in the first stage of the system.
- the first stage of the fuel system can be vented decoupled from engine constraints or active burner operation. Regardless of bleeding operations, a bleeder avoids a pressure increase due to re-heating effects, as the fuel pressure can relax over the additional path even after SV, DV1 and DV2 have been deactivated.
- a Abgresvorraum offers advantages in terms of pressure stability in the fuel system. Due to the permanent flow, there is less positive and negative acceleration of the fuel column, which ensures pressure waves with a lower amplitude level, especially in the case of frequency-controlled metering valves. A further advantage is that the continuous flushing in connection with the removal of the fuel in the fuel system can not cause deposits, in particular due to premature aging of the thermal stress exposed fuel. Of particular advantage is such a solution in view of the use of vegetable oils, since, for example, no rapeseed oil deposits can occur when the internal combustion engine is operated with rapeseed oil.
- This branch can be designed both as a free cross-section, as well as the hydraulic elements, such.
- a throttle or orifice include, it is a measure to prevent strong pressure oscillations in the fuel system. Furthermore, strong pressure increases due to the introduction of temperature on the fluid are prevented. Furthermore, the fuel aging is prevented by unnecessary temperature increases.
- An internal combustion engine 1 is in the in FIG. 1 illustrated embodiment, a 4-cylinder auto-ignition internal combustion engine 1, which may be equipped with a common-rail injection system, exhaust turbocharging and exhaust gas recirculation and of course any other cylinder numbers, in particular 1, 2, 3, 5, 6, 8, 10, 12, 16 , etc. may have.
- the internal combustion engine 1 is supplied via a fresh gas line system 2 combustion air, while the fuel is injected via the injection system directly into the individual cylinder combustion chambers.
- the exhaust gas is discharged into an exhaust manifold 3 and fed there via an exhaust pipe 4 an exhaust aftertreatment system 5.
- the exhaust aftertreatment system 5 has a burner 6 and a catalyst and / or particulate filter 7.
- a catalyst 7a and a particulate filter 7b are provided.
- all known devices and device combinations suitable for exhaust aftertreatment can be present here.
- a particle filter 7b may be present alone, in which case the particles filtered out of the exhaust gas and stored in the particle filter 7b are burned by the burner 6.
- a combination of catalyst 7a and particulate filter 7b are present, in which case the possible configurations as SCR catalyst (selective catalytic reduction), oxidation catalyst and NOx storage catalyst, in each case in combination with particulate filter 7b, are present ,
- the burner 6 is used to increase the exhaust gas temperature and to initiate the respective reaction in the corresponding catalyst 7a.
- the exhaust gas is passed through the exhaust pipe 4 and the burner in full flow through the catalyst 7a and particulate filter 7b and leaves the system via an exhaust pipe 8.
- the exhaust aftertreatment system 5 in one in the side stream or isolated system.
- the burner 6 has a burner housing 9, to which or in which the essential burner components are attached, and a combustion chamber 10 connected to the burner housing 9, which projects into the exhaust gas conduit 4.
- the combustion chamber 10 has an opening 11 in the flow direction of the exhaust gas toward the catalytic converter 7a, into which, for example, swirling components can be inserted.
- the burner 6 is - shown by arrows 12a, 12b - fuel and combustion air supplied.
- the exhaust aftertreatment system is controlled by an electronic control device, which may be part of the control system for the internal combustion engine 1.
- This control device becomes necessary data, such as exhaust gas temperature upstream of the burner 6, downstream of the burner 6 and in the exhaust line 8 (possibly also in the catalytic converter 7a and the particle filter 7b), and optionally also pressure values in the exhaust gas flow upstream of the catalytic converter 7a and behind the particle filter 7b or in others Constellation of each existing components determined and forwarded. From further stored in the controller maps further data can be stored and, if necessary, queried.
- FIG. 2 the fuel removal from a tank 23 to a fuel filter 25 via fuel lines 29, towards a disengageable and switchable dosing unit 30, is shown.
- This fuel-carrying system can be vented by means of Ab Kunststoffvoriques 24 and avoids a temperature input to a liquid contained in a trapped volume in that the liquid is returned via the return line 22 of the fuel line 21 of the burner 1 in the tank 23 of the internal combustion engine.
- Such a device can be used in particular in fuel systems of exhaust aftertreatment used, especially in burners, eg. For DPF regeneration.
- the fuel pressure which is measured via the pressure sensor 32, builds up in the space behind the shutoff valve as a result of the inflow of the fuel.
- the metering valve burner 18 and the metering valve 19 can in turn be controlled by the motor controller 31.
- the operating state of the metering valves 18 and 19 is determined so as to properly control the default amounts of fuel.
- FIG. 3 shows a comparison of the pressure curve over time in the fuel system with and without Ab horrvorraum.
- FIG. 4a shows an in FIG. 2 used Abberichttechnisch 24 with return 22nd
- FIG. 4b three cross-sectional variants of the discharge opening are shown.
- the first variant shows a free circular cross-section.
- a hydraulic throttle is shown in the second variant.
- a hydraulic shutter shows variant three in FIG. 4b ,
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- 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)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Verbrennungskraftmaschine, insbesondere mit einer Kraftstoff-Absteuermöglichkeit und einer Rücklaufleitung, vorzugsweise im Kraftstoffversorgungssystem für Abgasnachbehandlungssysteme.Internal combustion engine, in particular with a fuel-Absteuermöglichkeit and a return line, preferably in the fuel supply system for exhaust aftertreatment systems.
Derartige Systeme sind z. B. bekannt aus der
Weiter sind im Bereich der Abgasnachbehandlung Systeme bekannt, die keine Möglichkeit der Entlüftung im Stillstand vorsehen.Furthermore, systems are known in the field of exhaust aftertreatment, which provide no possibility of venting at a standstill.
Für die Kraftstoffversorgung des Abgasnachbehandlungssystems - dem Brenner - wird der Kraftstoff vor der Kraftstoffzumesseinheit (ZME / eng.: FCU) abgezweigt und über eine Kraftstoffleitung zur Dosiereinrichtung des Brennersystems geführt. Durch Aktivierung des sogenannten Shutoff-Ventils wird der Eintritt für den Kraftstoff in die Dosiereinrichtung freigegeben und steht mit dem Druck des Niederdruckkreislaufs - erzeugt durch die Kraftstoffförderpumpe - vor den Dosierventilen an. Solange die Dosierventile nicht aktiv angesteuert werden, wird der Kraftstoff im Versorgungssystem gehalten. Über einen softwaregestützten Zuschaltalgorithmus wird, wenn angefordert, anschließend das DV2 mit geringer Frequenz angesteuert und misst somit die für den Brennerstart benötigte Menge bei. Nachdem das Dosierventil die für die Verbrennung maximale Menge dosiert und der Brenner stabil betrieben wird, schaltet automatisch das DV1 zu. Dieses sorgt durch seine in den Abgastrakt eindosierte und die auf dem Diesel-Oxidationskatalysator (DOC) reagierende Menge für die notwendige Temperaturanhebung zur Regeneration des Diesel-Partikelfilters (DPF).For the fuel supply of the exhaust aftertreatment system - the burner - the fuel is branched off before the fuel metering unit (ZME / eng .: FCU) and fed via a fuel line to the metering device of the burner system. By activating the so-called shut-off valve, the inlet for the fuel in the metering device is released and is at the pressure of the low-pressure circuit - generated by the fuel delivery pump - in front of the metering valves. As long as the metering valves are not activated, the fuel is kept in the supply system. If requested, the DV2 is then controlled with a low frequency via a software-supported splitting algorithm and thus measures the quantity required for torch start at. After the dosing valve doses the maximum amount for combustion and the burner is operated stably, the DV1 automatically switches on. This ensures through its injected into the exhaust system and on the diesel oxidation catalyst (DOC) reactive amount for the necessary temperature increase for the regeneration of the diesel particulate filter (DPF).
Derartige Systeme ermöglichen keine ausreichenden Entlüftungsmöglichkeiten ohne eine aktive Brenner-Inbetriebnahme. Wenn eine Aktivierung des Brenners trotz notwendiger Systementlüftung nicht möglich ist, kann die Zuschaltung der Dosierventile nur erfolgen, wenn bestimmte motorische Bedingungen herrschen, z. B. hohe Temperatur vor dem DOC (> 300°C).Such systems do not provide adequate venting capabilities without active burner start-up. If activation of the burner is not possible despite necessary system ventilation, the dosing valves can only be connected if certain motor conditions prevail, eg. B. high temperature before the DOC (> 300 ° C).
Des Weiteren kommt es bei Deaktivierung aller in der Dosiereinheit befindlichen Aktuatoren (SV, DV1 und DV2) zu einem Einschluss des Kraftstoffvolumens, welches bei Erwärmung - bedingt durch z. B. Nachheizeffekte - zu starkem Druckanstieg führt.Furthermore, when all the actuators (SV, DV1 and DV2) in the dosing unit are deactivated, the fuel volume is included. B. Post-heating effects - leads to strong pressure increase.
In der Zeit, in der keine planmäßige Regeneration oder Spülvorgänge stattfinden, kommt es bei dem eingeschlossenen Kraftstoffvolumen zu Alterungseffekten, welche sich durch die Temperaturerhöhung signifikant verstärken und somit kritisch für den Systembetrieb werden können.In the period in which no scheduled regeneration or rinsing takes place, it comes with the trapped fuel volume to aging effects, which increase significantly by the temperature increase and thus can be critical for the system operation.
Es ist die Aufgabe der vorliegenden Erfindung, die oben genannten Nachteile zu vermeiden und eine Vorrichtung zu schaffen, die einen sicheren und wirtschaftlichen Betrieb unter unterschiedlichsten Betriebsbedingungen gewährleistet.It is the object of the present invention to avoid the disadvantages mentioned above and to provide a device which ensures safe and economical operation under a wide range of operating conditions.
Die Aufgabe der vorliegenden Erfindung wird durch eine Vorrichtung nach Anspruch 1 gelöst.The object of the present invention is achieved by a device according to
Die Einbringung einer Absteuervorrichtung schafft einen Kreislauf, welcher bei Öffnung des Shutoff-Ventils für einen permanenten Kraftstofffluss in der ersten Stufe des Systems sorgt.The introduction of a shut-off device provides a circuit which upon opening the shutoff valve provides for a permanent flow of fuel in the first stage of the system.
Somit kann die erste Stufe des Kraftstoffsystems entkoppelt von motorischen Randbedingungen oder aktivem Brennerbetrieb entlüftet werden. Unabhängig von Entlüftungsvorgängen vermeidet eine Absteuervorrichtung einen Druckanstieg durch Nachheizeffekte, da der Kraftstoffdruck sich selbst nach Deaktivierung von SV, DV1 und DV2 über den zusätzlichen Pfad entspannen kann.Thus, the first stage of the fuel system can be vented decoupled from engine constraints or active burner operation. Regardless of bleeding operations, a bleeder avoids a pressure increase due to re-heating effects, as the fuel pressure can relax over the additional path even after SV, DV1 and DV2 have been deactivated.
Des Weiteren bietet eine Absteuervorrichtung Vorteile hinsichtlich der Druckstabilität im Kraftstoffsystem. Durch den permanenten Fluss kommt es zu geringerer positiver und negativer Beschleunigung der Kraftstoffsäule, welches insbesondere bei frequenzgesteuerten Dosierventilen für Druckwellen mit geringerer Amplitudenhöhe sorgt. Ein weiterer Vorteil besteht darin, dass durch die stetige Spülung in Verbindung mit dem Entfernen des Kraftstoffs im Kraftstoffsystem keine Ablagerungen insbesondere durch vorzeitige Alterung des thermischen Stress ausgesetzten Kraftstoffs entstehen können. Von besonderem Vorteil ist eine derartige Lösung im Hinblick auf den Einsatz von Pflanzenölen, da beispielsweise keine Rapsölablagerungen entstehen können, wenn die Verbrennungskraftmaschine mit Rapsöl betrieben wird.Furthermore, a Absteuervorrichtung offers advantages in terms of pressure stability in the fuel system. Due to the permanent flow, there is less positive and negative acceleration of the fuel column, which ensures pressure waves with a lower amplitude level, especially in the case of frequency-controlled metering valves. A further advantage is that the continuous flushing in connection with the removal of the fuel in the fuel system can not cause deposits, in particular due to premature aging of the thermal stress exposed fuel. Of particular advantage is such a solution in view of the use of vegetable oils, since, for example, no rapeseed oil deposits can occur when the internal combustion engine is operated with rapeseed oil.
Die Schaffung einer Einheit, welche neben der normalen Flussrichtung einen zusätzlichen Querschnitt als Abzweigung bereitstellt, ist von Vorteil. Diese Abzweigung kann sowohl als freier Querschnitt ausgeführt sein, als auch die hydraulischen Elemente, wie z. B. eine Drossel oder Blende, beinhalten, es ist eine Maßnahme, um starke Druckschwingungen in dem Kraftstoffsystem zu verhindern. Weiter werden starke Druckanstiege durch Temperatureintrag auf das Fluid verhindert. Des Weiteren wird die Kraftstoffalterung durch unnötige Temperaturanstiege verhindert.The creation of a unit which provides an additional cross section as a branch besides the normal flow direction is advantageous. This branch can be designed both as a free cross-section, as well as the hydraulic elements, such. As a throttle or orifice include, it is a measure to prevent strong pressure oscillations in the fuel system. Furthermore, strong pressure increases due to the introduction of temperature on the fluid are prevented. Furthermore, the fuel aging is prevented by unnecessary temperature increases.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen, der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels sowie anhand der Zeichnungen. Diese zeigen in:
- Figur 1:
- eine schematische Darstellung einer Verbrennungskraftmaschine mit Abgasnachbehandlung,
- Figur 2:
- eine schematische Darstellung der Kraftstoffversorgungseinheit,
- Figur 3:
- ein Vergleich des Druckverlaufs im Kraftstoffsystem mit und ohne Absteuervorrichtung,
- Figur 4a:
- eine Absteuervorrichtung,
- Figur 4b:
- drei Querschnittsvarianten in der Absteuervorrichtung gemäß
Fig. 4a .
- FIG. 1:
- a schematic representation of an internal combustion engine with exhaust aftertreatment,
- FIG. 2:
- a schematic representation of the fuel supply unit,
- FIG. 3:
- a comparison of the pressure curve in the fuel system with and without Absteuervorrichtung,
- FIG. 4a
- a diversion device,
- FIG. 4b:
- three cross-sectional variants in the Absteuervorrichtung according to
Fig. 4a ,
Eine Verbrennkraftmaschine 1 ist in dem in
Das Abgasnachbehandlungssystem 5 weist einen Brenner 6 und einen Katalysator und/oder Partikelfilter 7 auf. In dem Ausführungsbeispiel sind ein Katalysator 7a und ein Partikelfilter 7b vorhanden. Grundsätzlich können hier alle bekannten für eine Abgasnachbehandlung geeigneten Vorrichtungen und Vorrichtungskombinationen vorhanden sein. So kann ein Partikelfilter 7b alleine vorhanden sein, wobei dann von dem Brenner 6 die in dem Partikelfilter 7b aus dem Abgas ausgefilterten und eingelagerten Partikel verbrannt werden. Es kann aber auch vorgesehen sein, dass eine Kombination aus Katalysator 7a und Partikelfilter 7b vorhanden sind, wobei dann die möglichen Ausbildungen als SCR-Katalysator (selektive katalytische Reduktion), Oxydationskatalysator und NOx-Speicherkatalysator, jeweils in Kombination mit dem Partikelfilter 7b, vorhanden sind. In diesem Falle wird der Brenner 6 zur Erhöhung der Abgastemperatur und zur Einleitung der jeweiligen Reaktion in dem entsprechenden Katalysator 7a eingesetzt. Schließlich ist es auch möglich, nur einen Katalysator 7a entsprechend den vorherigen Möglichkeiten einzusetzen, wobei auch in diesem Falle der Brenner 6 zur Erhöhung der Abgastemperatur und zur Einleitung der entsprechenden Reaktion in dem Katalysator 7a verwendet wird.The exhaust aftertreatment system 5 has a burner 6 and a catalyst and / or particulate filter 7. In the embodiment, a catalyst 7a and a particulate filter 7b are provided. In principle, all known devices and device combinations suitable for exhaust aftertreatment can be present here. Thus, a particle filter 7b may be present alone, in which case the particles filtered out of the exhaust gas and stored in the particle filter 7b are burned by the burner 6. However, it can also be provided that a combination of catalyst 7a and particulate filter 7b are present, in which case the possible configurations as SCR catalyst (selective catalytic reduction), oxidation catalyst and NOx storage catalyst, in each case in combination with particulate filter 7b, are present , In this case, the burner 6 is used to increase the exhaust gas temperature and to initiate the respective reaction in the corresponding catalyst 7a. Finally, it is also possible to use only one catalytic converter 7a in accordance with the previous possibilities, in which case the burner 6 is also used to increase the exhaust gas temperature and to initiate the corresponding reaction in the catalytic converter 7a.
In dem Ausführungsbeispiel wird das Abgas über die Abgasleitung 4 und den eingeschalteten Brenner in Vollstrom durch den Katalysator 7a und Partikelfilter 7b geleitet und verlässt das System über eine Auspuffleitung 8. Im Rahmen der Erfindung ist es selbstverständlich auch möglich, das Abgasnachbehandlungssystem 5 in einem im Nebenstrom oder isolierten System einzusetzen.In the exemplary embodiment, the exhaust gas is passed through the exhaust pipe 4 and the burner in full flow through the catalyst 7a and particulate filter 7b and leaves the system via an exhaust pipe 8. In the invention, it is of course also possible, the exhaust aftertreatment system 5 in one in the side stream or isolated system.
Der Brenner 6 weist ein Brennergehäuse 9 auf, an dem bzw. in dem die wesentlichen Brennerkomponenten befestigt sind und eine mit dem Brennergehäuse 9 verbundene Brennkammer 10, die in die Abgasleitung 4 hineinragt. Die Brennkammer 10 weist in Strömungsrichtung des Abgases zu dem Katalysator 7a hin eine Öffnung 11 auf, in die beispielsweise Verwirbelungskomponenten eingesetzt sein können. Dem Brenner 6 wird - durch Pfeile 12a, 12b dargestellt - Kraftstoff und Brennluft zugeführt. Gesteuert wird das Abgasnachbehandlungssystem durch eine elektronische Steuereinrichtung, die Bestandteil des Steuersystems für die Brennkraftmaschine 1 sein kann. Dieser Steuereinrichtung werden notwendige Daten, wie beispielsweise Abgastemperatur vor dem Brenner 6, hinter dem Brenner 6 und in der Auspuffleitung 8 (gegebenenfalls auch in dem Katalysator 7a und dem Partikelfilter 7b), zugeführt und darüber hinaus werden gegebenenfalls Druckwerte in dem Abgasstrom vor dem Katalysator 7a und hinter dem Partikelfilter 7b bzw. bei anderer Konstellation der jeweils vorhandenen Komponenten ermittelt und weitergeleitet. Aus weiterhin in der Steuereinrichtung abgespeicherten Kennfeldern können noch weitere Daten abgelegt und bedarfsweise abgefragt werden.The burner 6 has a burner housing 9, to which or in which the essential burner components are attached, and a combustion chamber 10 connected to the burner housing 9, which projects into the exhaust gas conduit 4. The combustion chamber 10 has an
In
Sobald das Shutoff-Ventil 20 über die Motorsteuerung 31 angesteuert wird, baut sich im Raum hinter dem Shutoff-Ventil durch das Einströmen des Kraftstoffs der Kraftstoffdruck auf, welcher über den Drucksensor 32 gemessen wird. Bei ausreichendem Kraftstoffdruck können das Dosierventil Brenner 18 als auch das Dosierventil 19 wiederum durch die Motorsteuerung 31 angesteuert werden. Durch hochfrequente Auswertung der Drucksignale des Drucksensors 32, 15 und 17 in der Motorsteuerung 31 wird der Betriebszustand der Dosierventile 18 und 19 ermittelt, um so die Vorgabemengen an Kraftstoff korrekt zuzusteuern.As soon as the
Die Darstellung gemäß
In
- 11
- BrennkraftmaschineInternal combustion engine
- 22
- Frischgasleitungssystem / AnsaugtraktFresh gas line system / intake system
- 33
- Abgassammler / AbgastraktExhaust manifold / exhaust tract
- 44
- Abgasleitungexhaust pipe
- 55
- Abgasnachbehandlungssystemaftertreatment system
- 66
- Brennerburner
- 7a7a
- Katalysatorcatalyst
- 7b7b
- Partikelfilterparticulate Filter
- 88th
- Auspuffleitungexhaust pipe
- 99
- Brennergehäuseburner housing
- 1010
- Brennkammercombustion chamber
- 1111
- Öffnungopening
- 12a, 12b12a, 12b
- Pfeilearrows
- 1313
- Einspritzunginjection
- 1414
- VentilValve
- 1515
- Drucksensorpressure sensor
- 1616
- Ventil BrennerValve burner
- 1717
- Drucksensor BrennerPressure sensor burner
- 1818
- Dosierventil BrennerDosing valve burner
- 1919
- Dosierventilmetering valve
- 2020
- Shutoff-VentilShutoff valve
- 2121
- Kraftstoffleitung BrennerFuel line burner
- 2222
- Rücklaufreturns
- 2323
- Tanktank
- 2424
- AbsteuervorrichtungAbsteuervorrichtung
- 2525
- KraftstofffilterFuel filter
- 2626
- KraftstoffversorgungseinheitFuel supply unit
- 2727
- KraftstoffförderpumpeFuel pump
- 2828
- Regel- bzw. SteuerungseinheitControl unit
- 2929
- KraftstoffleitungFuel line
- 3030
- schaltbare Dosiereinheitswitchable dosing unit
- 3131
- Motorsteuerung / Regel- bzw. SteuerungseinheitMotor control / control unit
- 3232
- Drucksensorpressure sensor
Claims (10)
dadurch gekennzeichnet, dass die Kraftstoffversorgungseinheit (26) wenigstens ein Dosierventil (18, 19) aufweist.Internal combustion engine according to claim 1,
characterized in that the fuel supply unit (26) has at least one metering valve (18, 19).
dadurch gekennzeichnet, dass die Kraftstoffversorgungseinheit (26) wenigstens einen Sensor (15, 17) aufweist.Internal combustion engine according to claim 1 or 2,
characterized in that the fuel supply unit (26) has at least one sensor (15, 17).
dadurch gekennzeichnet, dass die Kraftstoffversorgungseinheit (26) wenigstens ein Ventil (14, 16) aufweist.Internal combustion engine according to one or more of the preceding claims,
characterized in that the fuel supply unit (26) has at least one valve (14, 16).
dadurch gekennzeichnet, dass die Kraftstoffversorgungseinheit (26) wenigstens einen Rücklauf (22) aufweist.Internal combustion engine according to one or more of the preceding claims,
characterized in that the fuel supply unit (26) has at least one return (22).
dadurch gekennzeichnet, dass die Kraftstoffversorgungseinheit (26) wenigstens ein Kraftstofffilter (25) aufweist.Internal combustion engine according to one or more of the preceding claims,
characterized in that the fuel supply unit (26) comprises at least one fuel filter (25).
dadurch gekennzeichnet, dass die Kraftstoffversorgungseinheit (26) wenigstens eine Kraftstoffförderpumpe (27) aufweist.Internal combustion engine according to one or more of the preceding claims,
characterized in that the fuel supply unit (26) has at least one fuel delivery pump (27).
dadurch gekennzeichnet, dass sie wenigstens einen Partikelfilter (7b) aufweist.Internal combustion engine according to one or more of the preceding claims,
characterized in that it comprises at least one particulate filter (7b).
dadurch gekennzeichnet, dass sie wenigstens einen Katalysator (7a) aufweist.Internal combustion engine according to one or more of the preceding claims,
characterized in that it comprises at least one catalyst (7a).
dadurch gekennzeichnet, dass eine Vorrichtung nach einem oder mehreren der vorgenannten Ansprüche zum Einsatz kommt.Method for operating an internal combustion engine,
characterized in that a device according to one or more of the preceding claims is used.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011017028A DE102011017028A1 (en) | 2011-04-14 | 2011-04-14 | Absteuervorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2511512A1 true EP2511512A1 (en) | 2012-10-17 |
Family
ID=45999530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12002225A Ceased EP2511512A1 (en) | 2011-04-14 | 2012-03-28 | Spill device |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2511512A1 (en) |
DE (1) | DE102011017028A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022195043A1 (en) * | 2021-03-17 | 2022-09-22 | Bernd Niethammer | Flow control valve for closed-loop or open-loop controlling of a mass flow of a fluid, arrangement with a flow control valve of this type, and method for operating a flow control valve of this type |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006009099A1 (en) * | 2006-02-28 | 2007-08-30 | Daimlerchrysler Ag | Fuel injection system for use in e.g. diesel internal combustion engine, has pressure regulating valve that is arranged between check valve and dosing valve and is connected with system by outlet |
WO2008080693A1 (en) * | 2006-12-28 | 2008-07-10 | Robert Bosch Gmbh | Device for dosing fuel into the exhaust system of an internal combustion engine |
DE102008002003A1 (en) | 2008-05-27 | 2009-12-03 | Robert Bosch Gmbh | Fuel injector |
DE102008026477A1 (en) * | 2008-06-03 | 2009-12-10 | Deutz Ag | Exhaust after-treatment system for a self-igniting internal combustion engine |
DE102009058379A1 (en) * | 2009-12-15 | 2011-07-07 | Deutz Ag, 51149 | Internal combustion engine has intake tract, exhaust gas tract, air filter, regulating- and control unit, burner and fuel supply unit communicating with burner, where fuel supply unit comprises pressure sensor and regulating device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8375705B2 (en) * | 2008-05-30 | 2013-02-19 | Caterpillar Inc. | Exhaust system implementing low-temperature regeneration strategy |
-
2011
- 2011-04-14 DE DE102011017028A patent/DE102011017028A1/en not_active Withdrawn
-
2012
- 2012-03-28 EP EP12002225A patent/EP2511512A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006009099A1 (en) * | 2006-02-28 | 2007-08-30 | Daimlerchrysler Ag | Fuel injection system for use in e.g. diesel internal combustion engine, has pressure regulating valve that is arranged between check valve and dosing valve and is connected with system by outlet |
WO2008080693A1 (en) * | 2006-12-28 | 2008-07-10 | Robert Bosch Gmbh | Device for dosing fuel into the exhaust system of an internal combustion engine |
DE102008002003A1 (en) | 2008-05-27 | 2009-12-03 | Robert Bosch Gmbh | Fuel injector |
DE102008026477A1 (en) * | 2008-06-03 | 2009-12-10 | Deutz Ag | Exhaust after-treatment system for a self-igniting internal combustion engine |
DE102009058379A1 (en) * | 2009-12-15 | 2011-07-07 | Deutz Ag, 51149 | Internal combustion engine has intake tract, exhaust gas tract, air filter, regulating- and control unit, burner and fuel supply unit communicating with burner, where fuel supply unit comprises pressure sensor and regulating device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022195043A1 (en) * | 2021-03-17 | 2022-09-22 | Bernd Niethammer | Flow control valve for closed-loop or open-loop controlling of a mass flow of a fluid, arrangement with a flow control valve of this type, and method for operating a flow control valve of this type |
Also Published As
Publication number | Publication date |
---|---|
DE102011017028A1 (en) | 2012-10-18 |
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