DE102018125058B4 - Device for exhaust gas aftertreatment and method for operating the device - Google Patents
Device for exhaust gas aftertreatment and method for operating the device Download PDFInfo
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- DE102018125058B4 DE102018125058B4 DE102018125058.4A DE102018125058A DE102018125058B4 DE 102018125058 B4 DE102018125058 B4 DE 102018125058B4 DE 102018125058 A DE102018125058 A DE 102018125058A DE 102018125058 B4 DE102018125058 B4 DE 102018125058B4
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/048—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing around the moving part of the motor
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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
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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
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2033—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using a fuel burner or introducing fuel into exhaust duct
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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
- F01N3/30—Arrangements for supply of additional air
- F01N3/32—Arrangements for supply of additional air using air pump
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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
- F01N3/30—Arrangements for supply of additional air
- F01N3/32—Arrangements for supply of additional air using air pump
- F01N3/323—Electrically driven air pumps
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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
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
- F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
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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
- 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
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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
- 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
- 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
- F01N2610/1433—Pumps
- F01N2610/144—Control thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
Vorrichtung (1) zur Abgasnachbehandlung eines Verbrennungsmotors (2), aufweisend einen Vorratstank (3) für Kraftstoff, eine Fluidfördereinrichtung und ein abgasführendes Rohr (11), dadurch gekennzeichnet, dass eine elektromagnetisch angetriebene Dosierpumpe (5) als Fluidfördereinrichtung den von ihr aus dem Vorratstank (3) entnommenen Kraftstoff über ein elektrisch betätigtes Schaltventil (12) in einer ersten Schaltstellung des Schaltventils (12) einer Einspritzeinrichtung (6) oder einem Verdampfer (7) oder in einer zweiten Schaltstellung des Schaltventils (12) einer Verbrennereinrichtung (13) zuführen kann,wobei die Einspritzeinrichtung (6) oder der Verdampfer (7) den Kraftstoff in das abgasführende Rohr (11) einspeisen kann,und wobei die Verbrennereinrichtung (13) mit einem Verdichter (10) in Verbindung steht, der ihr Luft zuführen kann,und wobei die Verbrennereinrichtung (13) ihr Verbrennungsprodukt in das abgasführende Rohr (11) einspeisen kann.Device (1) for exhaust gas aftertreatment of an internal combustion engine (2), having a storage tank (3) for fuel, a fluid delivery device and an exhaust gas-carrying pipe (11), characterized in that an electromagnetically driven metering pump (5) as the fluid delivery device removes the from it from the storage tank (3) can supply removed fuel via an electrically operated switching valve (12) in a first switching position of the switching valve (12) to an injection device (6) or an evaporator (7) or in a second switching position of the switching valve (12) to a combustion device (13) wherein the injection device (6) or the evaporator (7) can feed the fuel into the exhaust-gas pipe (11), and wherein the combustion device (13) is connected to a compressor (10) which can supply it with air, and wherein the combustion device (13) can feed its combustion product into the exhaust gas pipe (11).
Description
Die Erfindung betrifft eine Vorrichtung zur Nachbehandlung des Abgases eines Verbrennungsmotors, aufweisend einen Vorratstank für Kraftstoff, eine Fluidfördereinrichtung und ein abgasführendes Rohr.The invention relates to a device for the aftertreatment of the exhaust gas of an internal combustion engine, having a storage tank for fuel, a fluid delivery device and a pipe carrying exhaust gas.
Vorrichtungen zur Abgasnachbehandlung sind bekannt und weit verbreitet. Bei einer bekannten und wirksamen Gattung von Vorrichtungen wird zusätzlicher Kraftstoff in die Abgasleitung eingespritzt und mit restlichem Sauerstoff im Abgas verbrannt. Dazu sind eine geeignete Anordnung der Einspritzanlage und eine ausreichend lange Vermischungsstrecke erforderlich, um eine befriedigende Wirkung, insbesondere eine Erhöhung der Abgastemperatur, zu erzielen.Devices for exhaust gas aftertreatment are known and widely used. In one known and effective type of device, additional fuel is injected into the exhaust pipe and burned with residual oxygen in the exhaust gas. This requires a suitable arrangement of the injection system and a sufficiently long mixing section in order to achieve a satisfactory effect, in particular an increase in the exhaust gas temperature.
Die
Die
Die
Die
Es ist Aufgabe der vorliegenden Erfindung, Kraftstoff in ein abgasführendes Rohr einzubringen und dabei abhängig von dem Betriebszustand des Verbrennungsmotors unterschiedliche Mittel zu nutzen, damit der Kraftstoff fein verteilt oder im schon verbrannten Zustand die Temperatur und die Zusammensetzung des Abgases des Verbrennungsmotors verändert.The object of the present invention is to introduce fuel into an exhaust pipe and to use different means depending on the operating state of the internal combustion engine so that the fuel is finely distributed or changes the temperature and the composition of the exhaust gas from the internal combustion engine when it is already burnt.
Die Lösung dieser Aufgabe erfolgt durch eine Vorrichtung mit den Merkmalen des ersten Anspruchs sowie durch ein Verfahren mit den Merkmalen des unabhängigen 10. Anspruchs.This object is achieved by a device with the features of the first claim and by a method with the features of the independent 10th claim.
Die Erfindung schließt die technische Lehre ein, dass eine elektromagnetisch angetriebene Dosierpumpe als Fluidfördereinrichtung den von ihr aus dem Vorratstank entnommenen Kraftstoff über ein elektrisch betätigtes Schaltventil in einer ersten Schaltstellung des Schaltventils einer Einspritzeinrichtung oder einem Verdampfer oder in einer zweiten Schaltstellung des Schaltventils einer Verbrennereinrichtung zuführen kann, wobei die Einspritzeinrichtung oder der Verdampfer den Kraftstoff in das abgasführende Rohr einspeisen kann, und wobei die Verbrennereinrichtung mit einem Verdichter in Verbindung steht, der ihr Luft zuführen kann, und wobei die Verbrennereinrichtung ihr Verbrennungsprodukt in das abgasführende Rohr einspeisen kann.
Weil die Dosierpumpe mit einem Schaltventil kombiniert ist, kann auf einfache und gesteuerte Weise die Methode des Einbringens des Brennstoffs in die Abgasleitung in Abhängigkeit von den Betriebsbedingungen des Verbrennungsmotors angepasst werden. Die elektromagnetisch angetriebene Dosierpumpe gestattet auf sehr einfache Weise eine Einstellung der Fördermenge pro Zeiteinheit, nämlich durch eine Einstellung der Frequenz des elektrischen Signals an den Elektromagneten.The invention includes the technical teaching that an electromagnetically driven metering pump as a fluid delivery device can supply the fuel it has withdrawn from the storage tank via an electrically operated switching valve in a first switching position of the switching valve of an injection device or an evaporator or in a second switching position of the switching valve of a combustion device , wherein the injection device or the evaporator can feed the fuel into the exhaust-gas pipe, and wherein the combustion device is connected to a compressor which can supply air to it, and wherein the combustion device can feed its combustion product into the exhaust-gas pipe.
Because the metering pump is combined with a switching valve, the method of introducing the fuel into the exhaust pipe can be adapted in a simple and controlled manner depending on the operating conditions of the internal combustion engine. The electromagnetically driven metering pump allows the delivery rate per unit of time to be adjusted in a very simple manner, namely by adjusting the frequency of the electrical signal to the electromagnet.
Die abhängigen Ansprüche beinhalten vorteilhafte Weiterbildungen der Erfindung.The dependent claims contain advantageous developments of the invention.
In einer ersten vorteilhaften Ausführung weist die erfindungsgemäße Vorrichtung einen Abgasturbolader auf, der aus dem Verdichter und einer von dem Abgas des Verbrennungsmotors angetriebenen Turbine besteht, wobei der Verdichter auch die für die Verbrennereinrichtung erforderliche Luft bereitstellen kann, wenn er dazu gesteuert oder geschaltet veranlasst wird. Da die Luft für die Verbrennereinrichtung von dem Verdichter abgezapft wird, wird sie als Zapfluft bezeichnet.In a first advantageous embodiment, the device according to the invention has an exhaust gas turbocharger, which consists of the compressor and a turbine driven by the exhaust gas of the internal combustion engine, the compressor also being able to provide the air required for the combustion device if it is controlled or activated to do so. Since the air for the combustion device is drawn off by the compressor, it is referred to as bleed air.
Die Nutzung der Zapfluft stellt eine sehr preisgünstige Lösung der Versorgungsaufgabe dar, wenn ein Abgasturbolader vorhanden ist.The use of the bleed air represents a very inexpensive solution to the supply task if an exhaust gas turbocharger is available.
In einer zweiten Ausführung weist die Vorrichtung einen von einem Elektromotor angetriebenen Verdichter auf, der die für die Verbrennereinrichtung erforderliche Luft bereitstellen kann, wenn der den Verdichter antreibende Elektromotor gesteuert oder geschaltet aktiviert wird.In a second embodiment, the device has a compressor driven by an electric motor, which can provide the air required for the combustion device when the electric motor driving the compressor is activated in a controlled or switched manner.
Bei dieser Lösung ist man unabhängig von einem Abgasturbolader und verfügt über eine einfache Möglichkeit, den Luftstrom ein- und auszuschalten.With this solution you are independent of an exhaust gas turbocharger and have a simple way of switching the air flow on and off.
Vorzugsweise weist die Einspritzeinrichtung ein elektromagnetisch betätigtes Einspritzventil, eine Düse und einen Auslass in das abgasführende Rohr auf. Die Verbrennereinrichtung weist vorzugsweise eine Mischeinrichtung zur Vermischung von Luft und Brennstoff und eine Brennkammer auf, wobei die Brennkammer mit dem abgasführenden Rohr fluidisch verbunden ist.The injection device preferably has an electromagnetically actuated injection valve, a nozzle and an outlet into the pipe carrying the exhaust gas. The combustion device preferably has a mixing device for mixing air and fuel and a combustion chamber, wherein the combustion chamber is fluidically connected to the pipe carrying the exhaust gas.
Alternativ zu der Einspritzeinrichtung kann ein Verdampfer vorgesehen sein, der den Kraftstoff in das abgasführende Rohr einbringen kann, wobei der Verdampfer in bekannter Weise aus einem Gehäuse, einem elektrisch beheizten Glühstift, einem Einlass für den Kraftstoff und einem Auslass besteht.As an alternative to the injection device, an evaporator can be provided which can introduce the fuel into the pipe carrying the exhaust gas, the evaporator comprising, in a known manner, a housing, an electrically heated glow plug, an inlet for the fuel and an outlet.
Eine Einspritzeinrichtung oder ein Verdampfer bewirken eine gute Vermischung des eingebrachten Kraftstoffs mit dem Abgas, wenn das Abgas eine ausreichend hohe Temperatur aufweist.An injection device or an evaporator bring about a good mixing of the introduced fuel with the exhaust gas when the exhaust gas has a sufficiently high temperature.
Die elektromagnetisch angetriebene Dosierpumpe ist vorteilhafterweise als innen durchströmte Hubkolbenpumpe ausgeführt, wobei ein Elektromagnet gegen eine Rückstellfeder eine translatorisch wirkende Verdrängereinheit antreibt, und wobei der von der Dosierpumpe geförderte Brennstoff eine Magnetspule des Elektromagneten durchströmen kann und kühlt.The electromagnetically driven metering pump is advantageously designed as an internally perfused reciprocating piston pump, with an electromagnet driving a translatory displacement unit against a return spring, and with the fuel delivered by the metering pump being able to flow through a magnetic coil of the electromagnet and cooling.
Durch die Bauweise als innen durchströmte Hubkolbenpumpe ist eine dynamisch wirkende Abdichtung des Hubkolbens nicht erforderlich, und man erreicht dadurch eine sehr zuverlässige Abdichtung der Dosierpumpe nach außen.Due to the construction as a reciprocating piston pump with internal flow, a dynamic sealing of the reciprocating piston is not necessary, and a very reliable sealing of the metering pump to the outside is achieved as a result.
Die Dosierpumpe weist vorteilhafterweise eine mit einem Hubkolben der Verdrängereinheit kraft- oder formschlüssig verbundene Absperreinrichtung auf, die im Zusammenwirken mit einem Sitzelement bei nicht bestromtem Elektromagneten in einem durch die Rückstellfeder bewirkten Ruhezustand der Dosierpumpe eine Durchströmung der Dosierpumpe verhindert.The metering pump advantageously has a shut-off device connected non-positively or positively to a reciprocating piston of the displacement unit, which, in cooperation with a seat element, prevents flow through the metering pump when the electromagnet is not energized in a rest state of the metering pump caused by the return spring.
Dadurch wird ein Nachfließen von Kraftstoff im Ruhezustand oder ein Zurückfließen von Kraftstoff im Ruhezustand verhindert.This prevents fuel from flowing back in the idle state or from flowing back in the idle state.
Die Vorrichtung weist vorteilhafterweise einen Temperatursensor auf, der die Gastemperatur in dem abgasführenden Rohr an eine programmgesteuerte elektrische Steuerung meldet, wobei die elektrische Steuerung den Elektromagneten der Dosierpumpe mit gepulstem elektrischen Strom beaufschlagt, und wobei der gepulste elektrische Strom zu dem Elektromagneten eine zeitlich variable Stromstärke und eine zeitlich variable Pulsfrequenz aufweisen kann.The device advantageously has a temperature sensor which reports the gas temperature in the exhaust pipe to a program-controlled electrical controller, the electrical controller applying pulsed electrical current to the electromagnet of the metering pump, and the pulsed electrical current to the electromagnet having a time-variable current strength and can have a time-variable pulse frequency.
Zum Betrieb der Vorrichtung wird die Dosierpumpe als Fluidfördereinrichtung durch eine programmgesteuerte elektrische Steuerung mit pulsierendem elektrischen Strom beaufschlagt, wobei die elektrische Steuerung selbst eine Motorsteuerung des Verbrennungsmotors ist oder mit einer Motorsteuerung des Verbrennungsmotors in Verbindung steht und Zustandsinformationen des Verbrennungsmotors, vorzugsweise über die Belastung des Verbrennungsmotors und die Temperatur des Abgases, verarbeiten kann.
Dabei beaufschlagt die elektrische Steuerung in programmmäßig festgelegter Abhängigkeit von den genannten Zustandsinformationen die Dosierpumpe mit pulsierendem elektrischen Strom.
Die elektrische Steuerung veranlasst ein elektromagnetisch betätigtes Schaltventil durch ein elektrisches Signal, den von der Dosierpumpe geförderten Brennstoff zu einer Einspritzeinrichtung oder zu einem Verdampfer zu leiten, wenn die Abgastemperatur in dem abgasführenden Rohr so hoch ist, dass der Kraftstoff mindestens teilweise am Auslass der Einspritzeinrichtung verdampft.
Dabei versorgt die elektrische Steuerung auch das Schaltventil oder den Verdampfer mit elektrischer Energie.
Vorteilhafterweise wird eine Frequenz des pulsierenden elektrischen Stroms zur Beaufschlagung der Dosierpumpe von der elektrischen Steuerung in programmmäßig festgelegter Weise in Abhängigkeit von den oben genannten Zustandsinformationen, insbesondere von der Abgastemperatur, bestimmt. In dem Fall, dass wegen zu geringer Abgastemperatur die Einspritzvorrichtung von der elektrischen Steuerung nicht mit Brennstoff versorgt werden soll, wird das Schaltventil durch ein elektrisches Signal von der elektrischen Steuerung veranlasst, eine Verbrennereinrichtung mit Brennstoff zu versorgen.To operate the device, the metering pump as a fluid delivery device is acted upon by a program-controlled electrical controller with pulsating electrical current, the electrical controller itself being an engine controller of the combustion engine or being connected to an engine controller of the combustion engine and status information of the combustion engine, preferably about the load on the combustion engine and the temperature of the exhaust gas.
In this case, the electrical control applies a pulsating electrical current to the metering pump in a program-defined manner as a function of the stated status information.
The electrical control causes an electromagnetically operated switching valve to use an electrical signal to direct the fuel delivered by the metering pump to an injection device or to an evaporator when the exhaust gas temperature in the exhaust pipe is so high that the fuel evaporates at least partially at the outlet of the injection device .
The electrical control also supplies the switching valve or the evaporator with electrical energy.
Advantageously, a frequency of the pulsating electrical current for acting on the metering pump is determined by the electrical control in a program-defined manner as a function of the above-mentioned status information, in particular the exhaust gas temperature. In the event that the injection device should not be supplied with fuel by the electrical control because the exhaust gas temperature is too low, the switching valve is caused by an electrical signal from the electrical control to supply a combustion device with fuel.
Dabei erhält die Verbrennereinrichtung aus einem Verdichter Luft, diese Luft wird mit dem Brennstoff in einer Mischeinrichtung vermischt und in einer Brennkammer verbrannt, wobei die Brennkammer fluidisch mit dem abgsführenden Rohr verbunden ist.
Gleichzeitig wird die Versorgung der Verbrennereinrichtung mit Luft aus einem Verdichter von der elektrischen Steuerung aktiviert, indem beispielsweise der den Verdichter antreibende Elektromotor eingeschaltet wird.The combustion device receives air from a compressor, this air is mixed with the fuel in a mixing device and burned in a combustion chamber, the combustion chamber being fluidically connected to the exhaust pipe.
At the same time, the supply of air to the combustion device from a compressor is activated by the electrical control, for example by switching on the electric motor driving the compressor.
Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus nachfolgender Beschreibung anhand der Zeichnung.Further details, features and advantages of the invention emerge from the following description with reference to the drawing.
Es zeigt:
-
1 Eine schematische Darstellung der erfindungsgemäßen Vorrichtung mit einer Einspritzeinrichtung, einer Verbrennereinrichtung und einem Temperatursensor. -
2 Eine schematische Darstellung der erfindungsgemäßen Vorrichtung mit einer Verbrennereinrichtung und einem Verdampfer -
3 Eine Schemazeichnung der Abgasturboladers. -
4 Eine Schemazeichnung des elektromotorisch angetriebenen Verdichters. -
5 Eine Schemazeichnung der Einspritzeinrichtung. -
6 Eine Schemazeichnung der Verbrennereinrichtung -
7 Eine Schemazeichnung der Dosierpumpe
-
1 A schematic representation of the device according to the invention with an injection device, a combustion device and a temperature sensor. -
2 A schematic representation of the device according to the invention with a combustion device and an evaporator -
3 A schematic drawing of the exhaust gas turbocharger. -
4th A schematic drawing of the compressor driven by an electric motor. -
5 A schematic drawing of the injection device. -
6th A schematic drawing of the combustion equipment -
7th A schematic drawing of the dosing pump
Die erfindungsgemäße Vorrichtung (
Dabei steht die Verbrennereinrichtung (
Die in
In der Ausführung gemäß
In der Ausführung gemäß
Die Einspritzeinrichtung (
Der Verdampfer (
Die Verbrennereinrichtung (
Die elektromagnetisch angetriebenen Dosierpumpe (
Die Dosierpumpe (
Die Dosierpumpe (
Die erfindungsgemäße Vorrichtung (
Die vorhergehende Beschreibung gemäß der vorliegenden Erfindung dient nur zu illustrativen Zwecken und nicht zum Zwecke der Beschränkung der Erfindung. Im Rahmen der Erfindung sind verschiedene Änderungen und Modifikationen möglich, ohne den Umfang der Erfindung sowie ihre Äquivalente zu verlassen.The preceding description according to the present invention is for illustrative purposes only and not for the purpose of limiting the invention. Various changes and modifications are possible within the scope of the invention without departing from the scope of the invention and its equivalents.
BezugszeichenlisteList of reference symbols
- 11
- Vorrichtungcontraption
- 22
- VerbrennungsmotorInternal combustion engine
- 33
- VorratstankStorage tank
- 55
- DosierpumpeDosing pump
- 66th
- EinspritzeinrichtungInjection device
- 77th
- VerdampferEvaporator
- 88th
- LuftleitungAir duct
- 1010
- Verdichtercompressor
- 1111
- abgasführendes Rohrexhaust pipe
- 1212
- SchaltventilSwitching valve
- 1313
- VerbrennereinrichtungCombustion device
- 1414th
- AbgasturboladerExhaust gas turbocharger
- 1515th
- Turbineturbine
- 1616
- MischeinrichtungMixing device
- 1717th
- BrennkammerCombustion chamber
- 1818th
- Düsejet
- 1919th
- AuslassOutlet
- 2020th
- ElektromagnetElectromagnet
- 2121st
- VerdrängereinheitDisplacement unit
- 2222nd
- MagnetspuleSolenoid
- 2323
- HubkolbenReciprocating piston
- 2424
- AbsperreinrichtungShut-off device
- 2525th
- RückstellfederReturn spring
- 2626th
- SitzelementSeating element
- 2727
- TemperatursensorTemperature sensor
- 2828
- ElektromotorElectric motor
- 2929
- EinspritzventilInjector
- 3030th
- Elektrische SteuerungElectric control
- 3131
- Leitungmanagement
- 3232
- Leitungmanagement
Claims (12)
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DE102018125058.4A DE102018125058B4 (en) | 2018-10-10 | 2018-10-10 | Device for exhaust gas aftertreatment and method for operating the device |
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Citations (4)
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EP0532031A1 (en) * | 1991-09-12 | 1993-03-17 | Firma J. Eberspächer | Device for the thermal regeneration of diesel engine exhaust particle filters |
DE19520604A1 (en) * | 1995-06-06 | 1996-08-01 | Daimler Benz Ag | Exhaust-gas cleaning system with additional burner for diesel engine |
DE102011003912A1 (en) * | 2011-02-10 | 2012-08-16 | Robert Bosch Gmbh | Device for dosing liquid for supporting exhaust gas treatment in exhaust line of internal combustion engine, has nozzle assembly for dosing liquid in exhaust line of internal combustion engine |
DE102014010249A1 (en) * | 2014-07-11 | 2016-01-14 | Thomas Magnete Gmbh | Apparatus and method for injecting liquid into the exhaust line of an internal combustion engine |
Family Cites Families (6)
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US7240483B2 (en) * | 2004-08-02 | 2007-07-10 | Eaton Corporation | Pre-combustors for internal combustion engines and systems and methods therefor |
US7464539B2 (en) * | 2005-04-29 | 2008-12-16 | Emcon Technologies Llc | Method and apparatus for supplying air to emission abatement device by use of turbocharger |
US8074443B2 (en) * | 2007-11-13 | 2011-12-13 | Eaton Corporation | Pre-combustor and large channel combustor system for operation of a fuel reformer at low exhaust temperatures |
DE102008033154A1 (en) * | 2008-07-15 | 2010-01-21 | Friedrich Boysen Gmbh & Co. Kg | regeneration device |
CN103080493A (en) * | 2010-07-07 | 2013-05-01 | 丰田自动车株式会社 | Internal combustion engine |
DE102012024260A1 (en) * | 2012-12-12 | 2014-06-12 | Man Truck & Bus Ag | Method and device for raising the exhaust gas temperature in the exhaust tract of a turbocharged internal combustion engine |
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- 2018-10-10 DE DE102018125058.4A patent/DE102018125058B4/en active Active
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0532031A1 (en) * | 1991-09-12 | 1993-03-17 | Firma J. Eberspächer | Device for the thermal regeneration of diesel engine exhaust particle filters |
DE19520604A1 (en) * | 1995-06-06 | 1996-08-01 | Daimler Benz Ag | Exhaust-gas cleaning system with additional burner for diesel engine |
DE102011003912A1 (en) * | 2011-02-10 | 2012-08-16 | Robert Bosch Gmbh | Device for dosing liquid for supporting exhaust gas treatment in exhaust line of internal combustion engine, has nozzle assembly for dosing liquid in exhaust line of internal combustion engine |
DE102014010249A1 (en) * | 2014-07-11 | 2016-01-14 | Thomas Magnete Gmbh | Apparatus and method for injecting liquid into the exhaust line of an internal combustion engine |
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CN111022162B (en) | 2022-11-11 |
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