DE3519543A1 - Device for reducing the pollutant exhaust emissions of an internal combustion engine - Google Patents

Device for reducing the pollutant exhaust emissions of an internal combustion engine

Info

Publication number
DE3519543A1
DE3519543A1 DE19853519543 DE3519543A DE3519543A1 DE 3519543 A1 DE3519543 A1 DE 3519543A1 DE 19853519543 DE19853519543 DE 19853519543 DE 3519543 A DE3519543 A DE 3519543A DE 3519543 A1 DE3519543 A1 DE 3519543A1
Authority
DE
Germany
Prior art keywords
combustion engine
internal combustion
exhaust gas
rotor
reducing
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.)
Withdrawn
Application number
DE19853519543
Other languages
German (de)
Inventor
Richard Dipl.-Ing. 7107 Neckarsulm Bauder
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.)
Audi AG
Original Assignee
Audi AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Priority to DE19853519543 priority Critical patent/DE3519543A1/en
Publication of DE3519543A1 publication Critical patent/DE3519543A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F13/00—Pressure exchangers
    • 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
    • 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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/42—Engines with pumps other than of reciprocating-piston type with driven apparatus for immediate conversion of combustion gas pressure into pressure of fresh charge, e.g. with cell-type pressure exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

In order to reduce the pollutant exhaust emissions of an internal combustion engine with supercharging by means of a pressure wave machine, which has a rotor with axially running cells, the walls of these cells are coated at least partially with a catalytically active substance. Due to the large catalytically active surface available and due to the relatively long retention time of the exhaust gas in the rotor of the pressure wave machine, an effective exhaust emission control is achieved.

Description

Vorrichtung zur Verminderung der Schadstoffe im Abgas einer BrennkraftmaschineDevice for reducing the pollutants in the exhaust gas of an internal combustion engine

Die Erfindung bezieht sich auf eine Vorrichtung zur Verminderung der Schadstoffe im Abgas einer Brennkraftmaschine gemäß dem Oberbegriff des Anspruchs.The invention relates to a device for reducing the pollutants in the exhaust gas of an internal combustion engine according to the preamble of the claim.

Für eine wirksame Abgasentgiftung ist es erforderlich, daß eine möglichst große Katalysatorfläche zur Verfügung steht, daß die Abgase eine ausreichend lange Zeit mit der Katalysatorsubstanz in Berührung bleiben, um eine möglichst vollständige katalytische Verbrennung der Schadstoffe zu erreichen, und daß der Katalysator an einer Stelle angeordnet wird, an der die Abgase noch eine möglichst hohe Temperatur haben.For an effective exhaust gas detoxification it is necessary, that the largest possible catalyst surface is available, that the exhaust gases for a sufficiently long time Stay in contact with the catalyst substance for as long as possible in order to achieve as complete a catalytic combustion as possible to reach the pollutants, and that the catalytic converter is arranged at a point where the exhaust gases are still have as high a temperature as possible.

Es ist bekannt (DE-OS 25 40 882), die inneren Oberflächen der Wände des Abgaskrümmers, des Abgasvorrohres und des Vorschalldämpfers mit einer katalytisch wirksamen BeIt is known (DE-OS 25 40 882), the inner surfaces the walls of the exhaust manifold, the exhaust pipe and the front silencer with a catalytically active loading schichtung zu versehen. Damit wird eine verhältnismäßig lange Reaktionszeit erreicht und es findet die katalytische Verbrennung in einem Bereich der Auspuffleitung statt, in dem die Abgase noch eine hohe Temperatur haben. Die Größe der katalytisch wirkenden Oberfläche ist jelayering to provide. This makes a proportionate long reaction time is achieved and the catalytic combustion takes place in an area of the exhaust line instead, in which the exhaust gases are still at a high temperature. The size of the catalytically active surface is depending doch begrenzt.but limited.

Aufgabe der Erfindung ist es, bei einer Brennkraftmaschine mit Aufladung durch eine Druckwellenmaschine eine wirksame katalytische Abgasentgiftung zu erreichen.The object of the invention is, in an internal combustion engine with supercharging by a pressure wave machine to achieve effective catalytic exhaust gas decontamination.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Wände der Zellen der Druckwellenmaschine zumindest teilweise mit einer katalytischen Substanz beschichtet sind.This object is achieved according to the invention in that the walls of the cells of the pressure wave machine are at least partially coated with a catalytic substance are.

Die Erfindung macht sich den Umstand zu Nutze, daß das Abgas im Rotor der Druckwellenmaschine eine relativ lange Strecke zurücklegt, sodaß eine lange Zeit für die katalytische Verbrennung zur Verfügung steht. Da die Abgasseite der Druckwellenmaschine möglichst nahe am Auslaß der Brennkraftmaschine angeordnet wird, ist die Temperatur der Abgase noch sehr hoch, wenn diese mit der katalytisch wirksamen Substanz in Berührung kommen. Durch die Beschichtung der Wände der zahlreichen Zellen des Rotors wird außerdem dem Abgas eine große katalytisch wirksame Oberfläche dargeboten.The invention makes use of the fact that the exhaust gas in the rotor of the pressure wave machine takes a relatively long time Distance covered so that a long time is available for catalytic combustion. As the exhaust side the pressure wave machine is arranged as close as possible to the outlet of the internal combustion engine, is the temperature the exhaust gases are still very high when they come into contact with the catalytically active substance. Through the coating The walls of the numerous cells of the rotor also make the exhaust gas a great catalytically effective one Surface presented.

Als katalytisch wirksame Substanz könn'en die bekannten Stoffe, wie Platin, Platin-Rhodium-Verbindungen, Silber und dergleichen verwendet werden, gegebenenfalls unter Zwischenschaltung eines Trägermaterials, beispielsweise einem jf -Al umi ni um-Oxyd, einem sogenannten "Wash-Coat".The known substances such as platinum, platinum-rhodium compounds, Silver and the like can be used, if appropriate with the interposition of a carrier material, for example a jf -Al umi ni um oxide, a so-called "Wash-Coat".

Die Wirksamkeit der katalytischem Verbrennung kann durch die Größe der beschichteten Fläche des Rotors sowie durch die Zellengröße den Erfordernissen angepaßt werden.The effectiveness of the catalytic combustion can be determined by the size of the coated area of the rotor as well as adapted to the requirements by the cell size will.

In der Zeichnung ist eine Brennkraftmaschine mit Druckwellenaufladung und katalytischer Abgasentgiftung schematisch dargestellt.In the drawing is an internal combustion engine with pressure wave charging and catalytic exhaust gas decontamination is shown schematically.

Die Brennkraftmaschine 1, beispielsweise eine Diesel-Brennkraftmaschine, weist eine Einlaßleitung 2 zur Zuführung von Frischluft zu den Zylindern der Brennkraftmaschine 1 und eine Abgasleitung 3 zum Abführen der verbrannten Gase auf. Mit 4 ist die Druckwellenmaschine bezeichnet, in deren aufgeschnitten gezeichnetem zylindrischem Gehäuse 5 ein Rotor 6 umläuft, der von der Abtriebswelle der Brennkraftmaschi ne ,1 angetrieben wird.The internal combustion engine 1, for example a diesel internal combustion engine, has an inlet line 2 for supplying fresh air to the cylinders of the internal combustion engine 1 and an exhaust pipe 3 for discharging the burned gases. With 4 the pressure wave machine is referred to, a rotor 6 rotates in its cut-open cylindrical housing 5 which is driven by the output shaft the Brennkraftmaschi ne, 1 is driven.

Der Rotor 6 hat eine Vielzahl von axial verlaufenden Zellen 7. Die Stirnseiten des Gehäuses 5 sind von Deckeln 8, 9 verschlossen. In dem Deckel 8 ist eine erste Steueröffnung 10 vorgesehen, die mit der Abgasleitung 3 in Verbindung steht, sowie eine zweite Steueröffnung 11,The rotor 6 has a multiplicity of axially extending cells 7. The end faces of the housing 5 are covered by covers 8, 9 closed. A first control opening 10 is provided in the cover 8, which is connected to the exhaust pipe 3 in FIG Connection is, as well as a second control opening 11,

an die sich ein Auspuffrohr 12 anschließt. Der Deckel 9 ist ebenfalls mit zwei Steueröffnungen 13, 14 versehen, von denen die Steueröffnung 13 mit einer Frischluftleitung 15 und die Steueröffnung 14 mit der Einlaßleitung 2 in Verbindung steht.to which an exhaust pipe 12 connects. The cover 9 is also provided with two control openings 13, 14, of which the control opening 13 with a fresh air line 15 and the control port 14 with the inlet line 2 in Connection.

Die Funktion einer derartigen Druckwellenmaschine ist bekannt, sodaß sich eine detaillierte Beschreibung erübrigt. Vereinfacht dargestellt, strömen die expandierenden Auspuffgase durch die Steueröffnung 10 in die Zellen 7 des Rotors 6, geben hier über Druckwellen Energie an die durch die Leitung 15 angesaugte Frischluft ab und verlassen sodann in umgekehrter Richtung die Rotorzellen 7 durch die Steueröffnung 11. Die durch die Druckwellen verdichtete Frischluft strömt über die Steueröffnung 14 in die Ansaugleitung 2.The function of such a pressure wave machine is known, so that a detailed description is not necessary. To put it simply, the expanding flow Exhaust gases pass through the control opening 10 into the cells 7 of the rotor 6, here via pressure waves Energy to the fresh air sucked in through the line 15 and then leave in the opposite direction the rotor cells 7 through the control opening 11. The fresh air compressed by the pressure waves flows over the Control opening 14 in the suction line 2.

Um eine Verminderung der Schadstoffe in den Auspuffgasen zu erreichen, sind die die Zellen 7 des Rotors 6 begrenzenden Wände 16 zumindest teilweise mit einer katalytisch wirksamen Substanz beschichtet. Da das Abgas im Rotor 6 eine verhältnismäßig lange Strecke zurücklegt und überdies durch die Vielzahl von Zellen eine große katalytisch wirksame Oberfläche zur Verfügung steht, wird eine äußerst wirksame Abgasentgiftung ohne zusätzliche Bauteile erreicht.In order to reduce the pollutants in the exhaust gases, these are the cells 7 of the rotor 6 delimiting walls 16 at least partially coated with a catalytically active substance. Since that Exhaust gas travels a relatively long distance in the rotor 6 and, moreover, through the large number of cells a large catalytically effective surface is available, is an extremely effective exhaust gas detoxification achieved without additional components.

Claims (1)

296/85296/85 AUDI AG, 8070 IngolstadtAUDI AG, 8070 Ingolstadt Vorrichtung zur Verminderung der Schadstoffe im Abgas einer BrennkraftmaschineDevice for reducing the pollutants in the exhaust gas of an internal combustion engine P a t e η t a η s ρ r u c h P ate η ta η s ρ ruch Vorrichtung zur Verminderung der Schadstoffe im Abgas einer Brennkraftmaschine mit Aufladung durch eine Druckwellenmaschine, die einen Rotor mit axial verlaufenden Zellen aufweist, welche am einen axialen Ende mit einer mit dem Auslaßsystem der Brennkraftmaschine verbundenen Abgaszuleitung und einer Abgasableitung und am anderen axialen Ende mit einer Frischluftzuleitung und einer mit dem Einlaßsystem der Brennkraftmaschine verbundenen Frischluftableitung in Verbindung steht, dadurch gekennzeichnet, daß die Wände (16) der Zellen (7) des Rotors (6) der Druckwellenmaschine (4) zumindest teilweise mit einer katalytisch wirksamen Substanz beschichtet sind.Device for reducing the pollutants in the exhaust gas of an internal combustion engine with supercharging by a pressure wave machine, which has a rotor with axially extending cells, which at one axial end with a with the exhaust system of the internal combustion engine connected exhaust gas supply line and an exhaust gas discharge line and on the other axial end with a fresh air supply line and a is connected to the intake system of the internal combustion engine fresh air discharge in connection, thereby characterized in that the walls (16) of the cells (7) of the rotor (6) of the pressure wave machine (4) are at least partially coated with a catalytically active substance.
DE19853519543 1985-05-31 1985-05-31 Device for reducing the pollutant exhaust emissions of an internal combustion engine Withdrawn DE3519543A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853519543 DE3519543A1 (en) 1985-05-31 1985-05-31 Device for reducing the pollutant exhaust emissions of an internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853519543 DE3519543A1 (en) 1985-05-31 1985-05-31 Device for reducing the pollutant exhaust emissions of an internal combustion engine

Publications (1)

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DE3519543A1 true DE3519543A1 (en) 1986-12-04

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910959A (en) * 1988-10-11 1990-03-27 Pulso Catalytic Superchargers Corporation Pulsed catalytic supercharger silencer
US5284123A (en) * 1993-01-22 1994-02-08 Pulso Catalytic Superchargers Pressure wave supercharger having a stationary cellular member
DE29514798U1 (en) * 1995-09-18 1995-11-23 Theiler, Anton, 94577 Winzer Catalyst device
DE19845381C1 (en) * 1998-10-02 1999-12-16 Swu Ges Fuer Umwelttechnik Mbh Purifying apparatus for exhaust gas of an internal combustion engine
US6203763B1 (en) 1995-09-18 2001-03-20 Anton Theiler Filter or catalytic-converter device
WO2002020954A1 (en) * 2000-09-09 2002-03-14 Mahle Filtersysteme Gmbh Ventilation device for a crankcase
FR2878568A1 (en) * 2004-11-29 2006-06-02 Renault Sas Unit for pressure wave supercharger to internal combustion engine by admission of air and evacuation of exhaust gases
IT202200013771A1 (en) * 2022-06-29 2023-12-29 Decet Di Giovanni Cipolla Sas SMART WAVE BOOSTING AND POST-TREATMENT DEVICE FOR INTERNAL COMBUSTION ENGINE

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910959A (en) * 1988-10-11 1990-03-27 Pulso Catalytic Superchargers Corporation Pulsed catalytic supercharger silencer
US5284123A (en) * 1993-01-22 1994-02-08 Pulso Catalytic Superchargers Pressure wave supercharger having a stationary cellular member
DE29514798U1 (en) * 1995-09-18 1995-11-23 Theiler, Anton, 94577 Winzer Catalyst device
US6203763B1 (en) 1995-09-18 2001-03-20 Anton Theiler Filter or catalytic-converter device
DE19845381C1 (en) * 1998-10-02 1999-12-16 Swu Ges Fuer Umwelttechnik Mbh Purifying apparatus for exhaust gas of an internal combustion engine
WO2002020954A1 (en) * 2000-09-09 2002-03-14 Mahle Filtersysteme Gmbh Ventilation device for a crankcase
US6973925B2 (en) 2000-09-09 2005-12-13 Mahle Filtersysteme Gmbh Ventilation device for crankcase
FR2878568A1 (en) * 2004-11-29 2006-06-02 Renault Sas Unit for pressure wave supercharger to internal combustion engine by admission of air and evacuation of exhaust gases
IT202200013771A1 (en) * 2022-06-29 2023-12-29 Decet Di Giovanni Cipolla Sas SMART WAVE BOOSTING AND POST-TREATMENT DEVICE FOR INTERNAL COMBUSTION ENGINE

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