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DE4007516A1 - Reduction of exhaust pollution of diesel engine - by fitting particle filter and oxidising catalyser - Google Patents

Reduction of exhaust pollution of diesel engine - by fitting particle filter and oxidising catalyser

Info

Publication number
DE4007516A1
DE4007516A1 DE4007516A DE4007516A DE4007516A1 DE 4007516 A1 DE4007516 A1 DE 4007516A1 DE 4007516 A DE4007516 A DE 4007516A DE 4007516 A DE4007516 A DE 4007516A DE 4007516 A1 DE4007516 A1 DE 4007516A1
Authority
DE
Germany
Prior art keywords
exhaust gas
diesel engine
particle filter
line
exhaust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE4007516A
Other languages
German (de)
Other versions
DE4007516C2 (en
Inventor
Hans Houben
Manfred Hoecker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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Filing date
Publication date
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to DE4007516A priority Critical patent/DE4007516C2/en
Publication of DE4007516A1 publication Critical patent/DE4007516A1/en
Application granted granted Critical
Publication of DE4007516C2 publication Critical patent/DE4007516C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • 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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor
    • F02M26/60—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor in response to air intake pressure
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02B37/12—Control of the pumps
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

The diesel engine has a superchanger (7) which is driven by an exhaust gas turbine (4). The turbine (4) is fitted in the exhaust pipe (5, 6) which is fitted with a particle filter (2). The supercharger is fitted in the combustion air pipe (8, 9). In the upstream direction from the exhaust gas turbine there is an oxidising catalyser (12) and behind this, the particle filter is mounted. An exhaust gas cooler (10) is mounted in the pipe (3) which connects the particle filter to the compressor inlet pipe (9). USE - Diesel engines.

Description

Die Erfindung betrifft einen Dieselmotor mit geringer Schadstoffemission und niedrigem Kraftstoffverbrauch, insbesondere nach dem Oberbegriff des Anspruches 1.The invention relates to a diesel engine with less Pollutant emissions and low fuel consumption, in particular according to the preamble of claim 1.

Zunehmende Umweltverschmutzung und schwindende Energiereserven erfordern Brennkraftmaschinen mit geringer Schadstoffemission und niedrigem Kraftstoffverbrauch. Diese Forderungen gelten insbesondere auch für stationäre Brennkraftmaschinen, die den Vorschriften der 1986 novellierten Technischen Anleitung Luft (TA Luft) genügen müssen.Increasing pollution and dwindling energy reserves require internal combustion engines with low pollutant emissions and low fuel consumption. These Requirements also apply in particular to stationary internal combustion engines, which amended the regulations of 1986 Technical instructions for air (TA Luft) must suffice.

In der DE 36 01 703 werden Maßnahmen zur Verminderung der Schadstoffemission von Dieselmotoren beschrieben. Es handelt sich dabei um eine Anordnung mit katalytisch beschichteten Partikelfiltern in den einzelnen Zweigen einer Abgasleitung kurz hinter den jeweiligen Zylinderköpfen in Verbindung mit einer Rückführung von gefiltertem Abgas in die Ansaugkanäle der einzelnen Zylinderköpfe. Dadurch sollen die Partikelemission und die Emission des gasförmigen Schadstoffes NOX sowie durch die katalytische Beschichtung des Partikelfilters die gasförmigen Schadstoffe CO und HC vermindert werden.DE 36 01 703 measures to reduce the Pollutant emissions from diesel engines described. It deals an arrangement with catalytically coated Particle filters in the individual branches of a Exhaust pipe just behind the respective cylinder heads in Connection with a recirculation of filtered exhaust gas in the intake ports of the individual cylinder heads. This is supposed to the particle emission and the emission of the gaseous Pollutant NOX and the catalytic coating the particulate filter contains the gaseous pollutants CO and HC can be reduced.

Ein Nachteil dieser Anordnung ist, daß die gerade bei Vollast besonders hohe Stickoxidemission nicht gesenkt werden kann, da in diesem Betriebsbereich wegen der thermischen Belastung des Motors keine Abgasrückführung möglich ist. Außerdem ist die katalytische Beschichtung eines Partikelfilters bei Rußbelegung weitgehend unwirksam.A disadvantage of this arrangement is that it is at full load particularly high nitrogen oxide emissions cannot be reduced can, because in this operating area because of the thermal  Exhaust gas recirculation is not possible. In addition, the catalytic coating of a particle filter largely ineffective for soot occupancy.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Schadstoffemission des Dieselmotors im gesamten Betriebsbereich zu minimieren.The present invention is based on the object Emission of pollutants from the diesel engine in the entire operating area to minimize.

Die Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Durch die Rückführung gekühlter Abgase ist auch bei Vollastbetrieb des Motors eine gewisse Abgasrückführung möglich ohne den Motor thermisch zu überlasten. Die dabei ansteigende Rußemission ist unkritisch, da der Ruß im Partikelfilter zurückgehalten wird und das rückgeführte Abgas gereinigt ist.The object is achieved by the characterizing Features of claim 1 solved. Cooled by the return Exhaust gas is one even when the engine is operating at full load certain exhaust gas recirculation possible without the engine thermal to overload. The increasing soot emission is not critical, because the soot is retained in the particle filter and the recirculated exhaust gas is cleaned.

Während die Abgasrückführung im gesamten Betriebsbereich der Dieselbrennkraftmaschine für eine Absenkung der Stickoxidemission sorgt, werden die unverbrannten Kohlenwasserstoffe und das Kohlenmonoxid durch einen Oxidationskatalysator beseitigt. Dessen Lage kurz hinter der Abgasturbine sichert durch die dort herrschende Temperatur seine Wirksamkeit bei schon relativ niedriger Last.During the exhaust gas recirculation in the entire operating area the diesel internal combustion engine for a reduction in nitrogen oxide emissions worries, the unburned hydrocarbons and the carbon monoxide through an oxidation catalyst eliminated. Its location just behind the exhaust gas turbine ensures its effectiveness through the temperature prevailing there at a relatively low load.

Eine vorteilhafte Ausgestaltung der Erfindung gestattet eine freie Wahl der Abgasrückführmenge. Während bei höheren Lasten ein natürliches Druckgefälle zwischen der Abgasleitung und der Verbrennungsluftleitung besteht, kann es bei Teillast notwendig werden, die Ansaugluft zu drosseln, um die gewünschte Abgasrückführmenge zu verwirklichen. Die Drossel in der Abgasrückführleitung dient zur Begrenzung der Abgasrückführmenge bei höheren Lasten.An advantageous embodiment of the invention allows a free choice of the exhaust gas recirculation quantity. While at higher Load a natural pressure drop between the exhaust pipe and the combustion air line exists it becomes necessary to throttle the intake air at partial load, to achieve the desired exhaust gas recirculation quantity. The throttle in the exhaust gas recirculation line is used for Limitation of the exhaust gas recirculation quantity at higher loads.

Eine weitere vorteilhafte Ausbildung der Erfindung gestattet das Partikelfilter auch während des Betriebes des Dieselmotors zu regenerieren, um auf diese Weise einen kontinuierlichen Motorbetrieb zu gewährleisten.A further advantageous embodiment of the invention allows the particle filter even during operation of the diesel engine to regenerate in this way a continuous To ensure engine operation.

Weitere Merkmale der Erfindung gehen aus der nachfolgenden Beschreibung und der Zeichnung hervor, in der ein Ausführungsbeispiel der Erfindung schematisch dargestellt ist.Further features of the invention follow from the following Description and the drawing, in which an embodiment the invention is shown schematically.

Die Figur zeigt eine schematische Darstellung des Dieselmotors mit Abgasrückführung und Abgasnachbehandlungsanlage.The figure shows a schematic representation of the diesel engine with Exhaust gas recirculation and exhaust gas treatment system.

Der Dieselmotor 14 ist als 8-Zylinder-V-Motor ausgebildet. Er ist über eine erste Abgasleitung 5 mit einer Abgasturbine 4 eine Turboladers 1 verbunden, die einen Lader 7 antreibt.The diesel engine 14 is designed as an 8-cylinder V engine. It is connected via a first exhaust line 5 to an exhaust gas turbine 4, a turbocharger 1 , which drives a supercharger 7 .

Nach Verlassen der Abgasturbine 4 strömen die Abgase durch einen Oxidationskatalysator 12, der in einer zweiten Abgasleitung 6 kurz hinter der Abgasturbine 4 angeordnet ist. Danach gelangen die Abgase über eine Regenerationsvorrichtung 13 in ein Partikelfilter 2. Diesem schließt sich eine dritte Abgasleitung 15 an, von der eine Abgasrückführleitung 3 abzweigt. In der Abgasrückführleitung 3 befindet sich ein Abgaskühler 10 und eine regelbare Drossel 11.After leaving the exhaust gas turbine 4 , the exhaust gases flow through an oxidation catalytic converter 12 , which is arranged in a second exhaust gas line 6 just behind the exhaust gas turbine 4 . The exhaust gases then enter a particle filter 2 via a regeneration device 13 . This is followed by a third exhaust gas line 15 , from which an exhaust gas recirculation line 3 branches off. An exhaust gas cooler 10 and an adjustable throttle 11 are located in the exhaust gas recirculation line 3 .

Die Abgasrückführleitung 3 mündet in eine Ansaugluftleitung 9, die den Lader 7 mit einem Luftfilter 16 verbindet. In der Ansaugleitung 9 befindet sich eine regelbare Drossel 11a. Der Lader 7 ist über eine Ladeluftleitung 8 und einen Ladeluftkühler 17 mit dem Dieselmotor 14 verbunden.The exhaust gas recirculation line 3 opens into an intake air line 9 , which connects the charger 7 to an air filter 16 . In the intake line 9 there is an adjustable throttle 11 a. The charger 7 is connected to the diesel engine 14 via a charge air line 8 and a charge air cooler 17 .

Die Anlage funktioniert folgendermaßen:
Die heißen, ungereinigten Abgase des Dieselmotors 14 gelangen über die erste Abgasleitung 5 zur Abgasturbine 4, werden dort entspannt und strömen in den Oxidationskatalysator 12. Dort werden die nicht verbrannten Kohlenwasserstoffe und das Kohlenoxid oxidiert. Das so vorgereingte Abgas strömt durch die zweite Abgasleitung 6 und die Regenerationsvorrichtung 13 zum Partikelfilter 2. Dort werden die Rußpartikel ausgefiltert, so daß sich in der dritten Abgasleitung 15 gereinigtes Abgas befindet. Von der dritten Abgasleitung 15 strömt das gereinigte Abgas durch die Abgasrückführleitung 3 zum Abgaskühler 10, wo es gekühlt wird. Die über die regelbare Drossel 11 dosierte Abgasrückführmenge gelangt in die vom Luftfilter 16 zum Lader 7 führende Ansaugluftleitung 9. In der Ansaugluftleitung 9 wird bei Teillast der zur Förderung der Abgasrückführmenge erforderliche Unterdruck mit der regelbaren Ansaugluftdrossel 11a erzeugt. Die Drosseln 11, 11a dienen zum Steuern einer optimalen Rückführmenge im gesamten Betriebsbereich des Dieselmotors. Dazu können bekannte elektronische Steuermittel verwendet werden. Die Ladeluft vermischt mit der rückgeführten Abgasmenge gelangt über den Lader 7, die Ladeluftleitung 8 und den Ladeluftkühler 17 zum Dieselmotor 14.The system works as follows:
The hot, unpurified exhaust gases of the diesel engine 14 reach the exhaust gas turbine 4 via the first exhaust line 5 , are expanded there and flow into the oxidation catalytic converter 12 . There the unburned hydrocarbons and the carbon oxide are oxidized. The exhaust gas thus pre-cleaned flows through the second exhaust line 6 and the regeneration device 13 to the particle filter 2 . There, the soot particles are filtered out so that there is cleaned exhaust gas 15 in the third exhaust line. The cleaned exhaust gas flows from the third exhaust line 15 through the exhaust gas recirculation line 3 to the exhaust gas cooler 10 , where it is cooled. The exhaust gas recirculation quantity metered via the adjustable throttle 11 reaches the intake air line 9 leading from the air filter 16 to the charger 7 . In the intake air line 9 , the vacuum required to promote the exhaust gas recirculation quantity is generated with the controllable intake air throttle 11 a at partial load. The throttles 11, 11 a serve to control an optimal return quantity in the entire operating range of the diesel engine. Known electronic control means can be used for this. The charge air mixed with the recirculated exhaust gas quantity reaches the diesel engine 14 via the charger 7 , the charge air line 8 and the charge air cooler 17 .

Das gereinigte Abgas in der Ladeluft bewirkt eine Absenkung der Stickoxidemission ohne den Verschleiß des Dieselmotors zu erhöhen. Durch die Rückführung gekühlten Abgases ist eine Abgasrückführung auch bei hohen Lasten möglich, die zur Absenkung der dann besonders hohen Stickoxidemission führt. Die Anordnung des Oxidationskatalysators kurz hinter der Abgasturbine macht diesen schon bei niedrigen Lasten wirksam. Auf diese Weise wird im gesamten Betriebsbereich des Motors eine weitgehende Abgasreinigung erreicht. Die Regenerationsvorrichtung 13 gestattet eine vollautomatische Regeneration des Partikelfilters 2 während des Betriebes des Dieselmotors. Das saubere rückgeführte Abgas verschmutzt weder den Abgaskühler 10 noch erhöht es den Motorverschleiß. Der Oxidationskatalysator 12 ist gegen partikelbeladene Abgase unempfindlich und behält seine Wirksamkeit über lange Zeit. Aufgrund dieser Tatsachen erfüllt die Anlage die strengen Auflagen der TA Luft im Dauerbetrieb.The cleaned exhaust gas in the charge air causes a reduction in nitrogen oxide emissions without increasing the wear on the diesel engine. The recirculation of cooled exhaust gas enables exhaust gas recirculation even at high loads, which leads to a reduction in the particularly high nitrogen oxide emission. The arrangement of the oxidation catalytic converter just behind the exhaust gas turbine makes it effective even at low loads. In this way, extensive exhaust gas cleaning is achieved in the entire operating range of the engine. The regeneration device 13 allows a fully automatic regeneration of the particle filter 2 during the operation of the diesel engine. The clean, recirculated exhaust gas neither pollutes the exhaust gas cooler 10 nor increases engine wear. The oxidation catalytic converter 12 is insensitive to particle-laden exhaust gases and remains effective for a long time. Based on these facts, the plant meets the strict requirements of TA Luft in continuous operation.

Claims (3)

1. Dieselmotor mit einer Abgasleitung (5, 6), in der eine Abgasturbine (4) eines Abgasturboladers (1) und ein Partikelfilter (2) angeordnet sind und mit einer Verbrennungsluftleitung (8, 9), in der ein Lader (7) des Abgasturboladers (1) vorgesehen ist, sowie mit einer Abgasrückführleitung (3), die in Strömungsrichtung hinter dem Partikelfilter (2) von der Abgasleitung (5, 6) abzweigt und diese mit der Verbrennungsluftleitung (8, 9) verbindet, dadurch gekennzeichnet, daß in Strömungsrichtung hinter der Abgasturbine (4) ein Oxidationskatalysator (12) und hinter diesem das Partikelfilter (2) in der Abgasleitung (6) angeordnet sind und daß in der Abgasrückführleitung (3) ein Abgaskühler (10) vorgesehen ist.1. Diesel engine with an exhaust pipe ( 5, 6 ) in which an exhaust gas turbine ( 4 ) of an exhaust gas turbocharger ( 1 ) and a particle filter ( 2 ) are arranged and with a combustion air line ( 8, 9 ) in which a charger ( 7 ) Exhaust gas turbocharger ( 1 ) is provided, as well as with an exhaust gas recirculation line ( 3 ) which branches off from the exhaust gas line ( 5, 6 ) downstream of the particle filter ( 2 ) and connects it to the combustion air line ( 8, 9 ), characterized in that in Direction of flow behind the exhaust gas turbine ( 4 ), an oxidation catalyst ( 12 ) and behind this the particle filter ( 2 ) are arranged in the exhaust gas line ( 6 ) and that an exhaust gas cooler ( 10 ) is provided in the exhaust gas recirculation line ( 3 ). 2. Dieselmotor nach Anspruch 1, dadurch gekennzeichnet, daß in der Verbrennungsluftleitung (8, 9) in Strömungsrichtung vor der Einmündung der Abgasrückführleitung (3) und in der Abgasrückführleitung (3) Drosseln (11, 11a) angeordnet sind, die im gesamten Betriebsbereich des Dieselmotors regelbar sind.2. Diesel engine according to claim 1, characterized in that in the combustion air line ( 8, 9 ) in the flow direction before the confluence of the exhaust gas recirculation line ( 3 ) and in the exhaust gas recirculation line ( 3 ) throttles ( 11, 11 a) are arranged, which are in the entire operating range of the diesel engine are adjustable. 3. Dieselmotor nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dem Partikelfilter (2) eine Regenerationsvorrichtung (13) zugeordnet ist, wobei die Regenerationsvorrichtung (13) während des Betriebes des Dieselmotors betreibbar ist.3. Diesel engine according to claim 1 or 2, characterized in that the particle filter ( 2 ) is associated with a regeneration device ( 13 ), the regeneration device ( 13 ) being operable during the operation of the diesel engine.
DE4007516A 1990-03-09 1990-03-09 Diesel engine Expired - Fee Related DE4007516C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4007516A DE4007516C2 (en) 1990-03-09 1990-03-09 Diesel engine

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DE4328085A1 (en) * 1992-08-28 1994-03-03 Fuji Heavy Ind Ltd Exhaust gas recirculation system
DE4240239A1 (en) * 1992-12-01 1994-06-09 Wolfgang Schmitz Turbo-charged combustion engine with bypass valve serving intake air-cooler - allows cooling of recirculated combustion prods. or of fresh air for combustion purposes according to engine load.
DE4320045A1 (en) * 1993-06-17 1994-07-28 Daimler Benz Ag Supercharged internal combustion engine
DE4422966C1 (en) * 1994-06-30 1995-05-18 Mtu Friedrichshafen Gmbh Device for back-feed of cooled exhaust gas in IC engine
DE4340742A1 (en) * 1993-11-30 1995-06-01 Emitec Emissionstechnologie Process for reducing pollutant emissions from a diesel engine with a downstream oxidation catalytic converter
DE4446730A1 (en) * 1994-12-24 1996-06-27 Man Nutzfahrzeuge Ag Exhaust gas recirculation for an internal combustion engine with supercharging
DE19524603C1 (en) * 1995-07-06 1996-08-22 Daimler Benz Ag IC engine with exhaust gas recirculation
DE19618868A1 (en) * 1996-05-10 1997-11-13 Daimler Benz Ag Turbocharged diesel engine with exhaust gas feedback system
DE19728353C1 (en) * 1997-07-03 1998-09-24 Daimler Benz Ag IC engine with turbo charger
EP0879946A2 (en) * 1997-05-21 1998-11-25 Toyota Jidosha Kabushiki Kaisha An internal combustion engine
WO1998055759A1 (en) * 1997-06-06 1998-12-10 Turbodyne Systems, Inc. Method and apparatus for exhaust gas recirculation control and power augmentation in an internal combustion engine
DE19755817A1 (en) * 1997-12-16 1999-06-24 Daimler Chrysler Ag Device for feedback of exhaust gas from internal combustion engine
WO2000028203A1 (en) * 1998-11-09 2000-05-18 Stt Emtec Aktiebolag A method and device for an egr-system and a valve as well as a regulation method and device
US6138649A (en) * 1997-09-22 2000-10-31 Southwest Research Institute Fast acting exhaust gas recirculation system
US6216458B1 (en) * 1997-03-31 2001-04-17 Caterpillar Inc. Exhaust gas recirculation system
DE19955324A1 (en) * 1999-11-17 2001-05-23 Volkswagen Ag Device and method for reducing harmful components in the exhaust gas of an internal combustion engine, in particular a diesel internal combustion engine
WO2000077353A3 (en) * 1999-06-15 2001-05-31 Johnson Matthey Plc Improvements in emissions control
DE19957715C2 (en) * 1998-12-01 2002-01-17 Toyota Motor Co Ltd Exhaust emission control device for an internal combustion engine
DE4222087C2 (en) * 1992-07-04 2002-07-18 Motoren Werke Mannheim Ag Reduced pollutant diesel engine
US6820599B2 (en) 2003-02-03 2004-11-23 Ford Global Technologies, Llc System and method for reducing Nox emissions during transient conditions in a diesel fueled vehicle with EGR
US6863058B2 (en) 2003-02-03 2005-03-08 Ford Global Technologies, Llc System and method for reducing NOx emissions during transient conditions in a diesel fueled vehicle
DE102004036562A1 (en) * 2004-07-28 2006-03-23 Bayerische Motoren Werke Ag Clean low pressure exhaust gas recirculation
FR2883039A1 (en) * 2005-03-14 2006-09-15 Renault Sas Internal combustion engine e.g. diesel engine, has valve with shutters displaced by single actuator, where one shutter is displaced to regulate flow of recirculation gas circulating in duct
EP1840348A1 (en) * 2006-03-31 2007-10-03 Mazda Motor Corporation EGR System for Engine
DE10112521B4 (en) * 2000-03-16 2007-10-25 Ford Global Technologies, LLC (n.d.Ges.d. Staates Delaware), Dearborn diesel engine
DE102008004133A1 (en) 2008-01-11 2009-07-16 Volkswagen Ag Heating device for motor vehicle, has heating circuit provided with heat exchanger arranged in exhaust gas discharge pipe between exhaust gas outlet of internal-combustion engine and surrounding outlet
US8250865B2 (en) 2008-11-05 2012-08-28 Ford Global Technologies, Llc Using compressed intake air to clean engine exhaust gas recirculation cooler
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DE4222087C2 (en) * 1992-07-04 2002-07-18 Motoren Werke Mannheim Ag Reduced pollutant diesel engine
DE4328085C2 (en) * 1992-08-28 1998-08-20 Fuji Heavy Ind Ltd Exhaust gas recirculation system
DE4328085A1 (en) * 1992-08-28 1994-03-03 Fuji Heavy Ind Ltd Exhaust gas recirculation system
DE4240239A1 (en) * 1992-12-01 1994-06-09 Wolfgang Schmitz Turbo-charged combustion engine with bypass valve serving intake air-cooler - allows cooling of recirculated combustion prods. or of fresh air for combustion purposes according to engine load.
DE4320045A1 (en) * 1993-06-17 1994-07-28 Daimler Benz Ag Supercharged internal combustion engine
DE4340742A1 (en) * 1993-11-30 1995-06-01 Emitec Emissionstechnologie Process for reducing pollutant emissions from a diesel engine with a downstream oxidation catalytic converter
US5839273A (en) * 1993-11-30 1998-11-24 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Method for reducing pollutant emissions of a diesel engine with a downstream oxidation-type catalytic converter
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DE4446730C2 (en) * 1994-12-24 1998-03-19 Man Nutzfahrzeuge Ag Exhaust gas recirculation for an internal combustion engine with supercharging
DE4446730A1 (en) * 1994-12-24 1996-06-27 Man Nutzfahrzeuge Ag Exhaust gas recirculation for an internal combustion engine with supercharging
US5669365A (en) * 1995-07-06 1997-09-23 Mercedes-Benz Ag Internal combustion engine with exhaust gas recirculation
DE19524603C1 (en) * 1995-07-06 1996-08-22 Daimler Benz Ag IC engine with exhaust gas recirculation
DE19618868C2 (en) * 1996-05-10 1998-07-02 Daimler Benz Ag Internal combustion engine with an exhaust gas recirculation system
US5740786A (en) * 1996-05-10 1998-04-21 Mercedes-Benz Ag Internal combustion engine with an exhaust gas recirculation system
DE19618868A1 (en) * 1996-05-10 1997-11-13 Daimler Benz Ag Turbocharged diesel engine with exhaust gas feedback system
US6216458B1 (en) * 1997-03-31 2001-04-17 Caterpillar Inc. Exhaust gas recirculation system
EP0879946A2 (en) * 1997-05-21 1998-11-25 Toyota Jidosha Kabushiki Kaisha An internal combustion engine
EP0879946A3 (en) * 1997-05-21 1999-05-26 Toyota Jidosha Kabushiki Kaisha An internal combustion engine
WO1998055759A1 (en) * 1997-06-06 1998-12-10 Turbodyne Systems, Inc. Method and apparatus for exhaust gas recirculation control and power augmentation in an internal combustion engine
US5927075A (en) * 1997-06-06 1999-07-27 Turbodyne Systems, Inc. Method and apparatus for exhaust gas recirculation control and power augmentation in an internal combustion engine
DE19728353C1 (en) * 1997-07-03 1998-09-24 Daimler Benz Ag IC engine with turbo charger
EP0889226A2 (en) 1997-07-03 1999-01-07 Daimler-Benz Aktiengesellschaft Combustion engine with turbocharger and exhaust gas recirculation
US5937651A (en) * 1997-07-03 1999-08-17 Daimler-Benz A.G. Internal combustion engine with exhaust gas turbocharger
US6138649A (en) * 1997-09-22 2000-10-31 Southwest Research Institute Fast acting exhaust gas recirculation system
DE19755817C2 (en) * 1997-12-16 2001-02-15 Daimler Chrysler Ag Exhaust gas recirculation method
DE19755817A1 (en) * 1997-12-16 1999-06-24 Daimler Chrysler Ag Device for feedback of exhaust gas from internal combustion engine
US7017560B2 (en) 1998-11-09 2006-03-28 Stt Emtec Ab Method and device for an EGR-system and a valve as well as a regulation method and device
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WO2000028203A1 (en) * 1998-11-09 2000-05-18 Stt Emtec Aktiebolag A method and device for an egr-system and a valve as well as a regulation method and device
US6925992B1 (en) 1998-11-09 2005-08-09 Stt Emtec Ab Method and device for an EGR-system and a valve as well as a regulation method and device
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DE19957715C2 (en) * 1998-12-01 2002-01-17 Toyota Motor Co Ltd Exhaust emission control device for an internal combustion engine
US7189374B1 (en) 1999-06-15 2007-03-13 Johnson Matthey Public Limited Company Emissions control
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DE19955324A1 (en) * 1999-11-17 2001-05-23 Volkswagen Ag Device and method for reducing harmful components in the exhaust gas of an internal combustion engine, in particular a diesel internal combustion engine
DE10112521B4 (en) * 2000-03-16 2007-10-25 Ford Global Technologies, LLC (n.d.Ges.d. Staates Delaware), Dearborn diesel engine
US7273045B2 (en) 2003-02-03 2007-09-25 Ford Global Technologies, Llc System and method for reducing NOx emissions during transient conditions in a diesel fueled vehicle with EGR
US6863058B2 (en) 2003-02-03 2005-03-08 Ford Global Technologies, Llc System and method for reducing NOx emissions during transient conditions in a diesel fueled vehicle
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US6820599B2 (en) 2003-02-03 2004-11-23 Ford Global Technologies, Llc System and method for reducing Nox emissions during transient conditions in a diesel fueled vehicle with EGR
DE102004036562A1 (en) * 2004-07-28 2006-03-23 Bayerische Motoren Werke Ag Clean low pressure exhaust gas recirculation
EP1707781A1 (en) * 2005-03-14 2006-10-04 Renault Internal combustion engine with a valve system for regulating an exhaust gas recirculation rate and an automotive vehicle comprising such an engine.
FR2883039A1 (en) * 2005-03-14 2006-09-15 Renault Sas Internal combustion engine e.g. diesel engine, has valve with shutters displaced by single actuator, where one shutter is displaced to regulate flow of recirculation gas circulating in duct
EP1840348A1 (en) * 2006-03-31 2007-10-03 Mazda Motor Corporation EGR System for Engine
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