EP3701132A1 - Internal combustion engine with an exhaust gas system - Google Patents

Internal combustion engine with an exhaust gas system

Info

Publication number
EP3701132A1
EP3701132A1 EP18773943.8A EP18773943A EP3701132A1 EP 3701132 A1 EP3701132 A1 EP 3701132A1 EP 18773943 A EP18773943 A EP 18773943A EP 3701132 A1 EP3701132 A1 EP 3701132A1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
exhaust gas
exhaust system
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.)
Withdrawn
Application number
EP18773943.8A
Other languages
German (de)
French (fr)
Inventor
Stephan Rubbert
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP3701132A1 publication Critical patent/EP3701132A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F01N3/326—Engine-driven air pumps
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • 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
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • 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
    • F01N3/101—Three-way catalysts
    • 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
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/02—Exhaust 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/04—Catalytic converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • F01N2340/06—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the arrangement of the exhaust apparatus relative to the turbine of a turbocharger
    • 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
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/10—Carbon or carbon oxides
    • 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

Definitions

  • the invention relates to an internal combustion engine having an exhaust system with the features of the preamble of patent claim 1.
  • the technical environment is, for example, the German
  • an exhaust system for internal combustion engines with particle filter is known.
  • the exhaust system for an internal combustion engine has an exhaust line, which is connectable to an outlet side of the internal combustion engine, wherein in the exhaust system in the downstream direction
  • At least one catalyst is arranged and this is followed by a particle filter.
  • a secondary air inlet opening for introducing secondary air via at least one controllable valve into the exhaust gas line is provided in the exhaust gas line upstream of the particle filter and the secondary air is compressed air.
  • the secondary air is a partial flow of
  • Exhaust system wherein the secondary air inlet opening is arranged in the flow direction of the exhaust gas to the particle filter in the exhaust system.
  • Object of the present invention is to eliminate the CO emission as completely as possible and to oxidize in CO2.
  • the internal combustion engine can continue to be operated with a mixture enrichment and the CO are oxidized via the oxidation catalyst. Since the oxidation of the
  • the second emission control system should be as far away from the Internal combustion engine are installed, z. B. integrated in the
  • the exhaust gas temperature can be lowered as far as possible when entering the second emission control device.
  • the secondary air should be taken after the turbocharger compressor and before the intercooler.
  • the secondary air mass flow can be adjusted by the wastegate of the exhaust gas turbocharger and the throttle valve fresh air side.
  • the secondary air can also be provided by an electric compressor (e-booster).
  • the second emission control system can also be designed as a particle filter.
  • the secondary air system may be further used to regenerate a particulate filter.
  • Exhaust gas turbocharger and the throttle valve may be arranged in the secondary air line and a valve.
  • the first emission control system is preferably a three-way catalytic converter or a NOx storage catalytic converter.
  • the second emission control system may also be an SCR catalytic converter (Selective Catalytic Reduction).
  • the internal combustion engine can continue to be operated with a mixture enrichment in thermally critical map areas, without causing a high CO emission. With the mixture enrichment, the internal combustion engine can continue
  • the filter can be regenerated largely independent of the operating condition of the internal combustion engine, since the required
  • Oxygen excess can be effected by the secondary air system.
  • the invention is explained in more detail below with reference to an embodiment in a single figure.
  • Figure 1 shows schematically an internal combustion engine with an exhaust system.
  • FIG 1 shows schematically an internal combustion engine 1 with an exhaust system 2.
  • the exhaust system 2 is used for discharging exhaust gas
  • the exhaust gas flows first through a turbine 3 of an exhaust gas turbocharger and further through an exhaust pipe and through a first emission control system 4.
  • the exhaust gas flows through an exhaust pipe and through a silencer 6 and further through a second emission control system 7.
  • the exhaust gas leaves the exhaust gas through two tailpipes 8, the exhaust system 2 and flows into the open.
  • the two tailpipes 8 apply to this embodiment, the function is independent of the number of tailpipes 8.
  • a flow direction of the exhaust gas is shown schematically by two arrows.
  • a secondary air line 5 is provided with a not
  • a fresh air mass flow through the secondary air line 5 can with a non-illustrated
  • Throttle or a bypass, not shown, of the exhaust gas turbocharger or by a likewise not shown valve in the secondary air line 5 are regulated.
  • the first emission control system 4 is a three-way catalyst, in a second embodiment, it may be a NOx storage catalyst.
  • the second emission control system 7 is preferably a three-way
  • Catalyst may also be an SCR catalyst (Selective Catalytic Reduction) or a particulate filter, wherein the particulate filter may also be coated and may additionally work as a catalyst.
  • SCR catalyst Selective Catalytic Reduction
  • particulate filter may also be coated and may additionally work as a catalyst.
  • At least a portion of the exhaust pipes of the exhaust system 2 is profiled, so that the exhaust gas flowing through the exhaust system 2 is cooled as far as possible until it hits the second emission control system 7.
  • the exhaust pipe between the turbine outlet and the first exhaust gas purification system 4 is designed as an inlet funnel for the first exhaust gas purification system 4, so that this
  • Exhaust pipe section is omitted.
  • the exhaust pipe should be profiled between the first exhaust gas purification system 4 and the muffler 6 for better cooling.
  • the muffler 6 and the second emission control system 7 are arranged in a common housing in the flow direction of the exhaust gas spaced from each other.
  • a separate housing may be provided for the muffler 6 and the second emission control system 7, respectively.
  • the internal combustion engine can continue to be operated with a mixture enrichment in thermally critical map areas, without causing high CO emissions. With the mixture enrichment, the internal combustion engine can continue
  • the filter can be regenerated largely independent of the operating condition of the internal combustion engine, since the required
  • Oxygen excess can be adjusted by the secondary air 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)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention relates to an internal combustion engine (1) with an exhaust gas system (2) for discharging exhaust gas of the internal combustion engine (1). The internal combustion engine (1) has a turbocharger comprising a turbine (3) and a compressor. The turbine (3) is arranged in the exhaust gas system (2) between the internal combustion engine (1) and a first exhaust gas purification device (4), and the compressor is arranged in a fresh-air tract of the internal combustion engine (1). A secondary air line (5) is provided, by means of which the fresh-air tract can be connected to the exhaust gas system (2) between the compressor and the internal combustion engine (1) so as to conduct fresh air. A noise damper (6) is provided in the exhaust gas system (2) downstream of the first exhaust gas purification device (4) in the flow direction of the exhaust gas, a second exhaust gas purification device (7) is arranged in the exhaust gas system (2) downstream of the noise damper (6) in the flow direction of the exhaust gas, and the secondary air line (5) opens into the exhaust gas system (2) between the noise damper (6) and the second exhaust gas purification device (7). The design according to the invention allows the internal combustion engine (1) to be operated at a high load with a mixture enrichment.

Description

Brennkraftmaschine mit einer Abgasanlage  Internal combustion engine with an exhaust system
Die Erfindung betrifft eine Brennkraftmaschine mit einer Abgasanlage mit den Merkmalen aus dem Oberbegriff des Patentanspruchs 1 . The invention relates to an internal combustion engine having an exhaust system with the features of the preamble of patent claim 1.
Zum technischen Umfeld wird beispielsweise auf die Deutsche The technical environment is, for example, the German
Offenlegungsschrift DE 10 2010 044 102 A1 hingewiesen. Aus dieser Offenlegungsschrift ist eine Abgasanlage für Brennkraftmaschinen mit Partikelfilter bekannt. Die Abgasanlage für eine Brennkraftmaschine weist einen Abgasstrang auf, der mit einer Auslassseite der Brennkraftmaschine verbindbar ist, wobei im Abgasstrang in stromabwärtiger Richtung Offenlegungsschrift DE 10 2010 044 102 A1. From this publication, an exhaust system for internal combustion engines with particle filter is known. The exhaust system for an internal combustion engine has an exhaust line, which is connectable to an outlet side of the internal combustion engine, wherein in the exhaust system in the downstream direction
wenigstens ein Katalysator angeordnet ist und diesem ein Partikelfilter nachgeschaltet ist. Weiter ist im Abgasstrang stromauf des Partikelfilters eine Sekundärlufteinlassöffnung zum Einleiten von Sekundärluft über wenigstens ein regelbares Ventil in den Abgasstrang vorgesehen und die Sekundärluft ist verdichtete Luft. Bevorzugt ist die Sekundärluft ein Teilstrom der at least one catalyst is arranged and this is followed by a particle filter. Furthermore, a secondary air inlet opening for introducing secondary air via at least one controllable valve into the exhaust gas line is provided in the exhaust gas line upstream of the particle filter and the secondary air is compressed air. Preferably, the secondary air is a partial flow of
eingangsseitige Ladeluft einer aufgeladenen Brennkraftmaschine. Input side charge air of a supercharged internal combustion engine.
Auch aus der Deutschen, noch nicht veröffentlichten Patentanmeldung DE 10 2017 203 267 ist eine Brennkraftmaschine mit einer Abgasanlage bekannt. Aus dieser Schrift, von der die vorliegende Erfindung ausgeht, ist eine Brennkraftmaschine mit einer Abgasanlage bekannt, zum Abführen von Abgas der Brennkraftmaschine, wobei in der Abgasanlage ein Partikelfilter angeordnet ist und wobei eine Sekundärlufteinlassöffnung vorgesehen ist zum Einleiten von Sekundärluft über ein Verschlusselement in die Also from the German, unpublished patent application DE 10 2017 203 267 an internal combustion engine with an exhaust system is known. From this document, from which the present invention proceeds, an internal combustion engine with an exhaust system is known for discharging exhaust gas of the internal combustion engine, wherein in the exhaust system, a particulate filter is arranged and wherein a secondary air inlet opening is provided for introducing secondary air via a closure element in the
Abgasanlage, wobei die Sekundärlufteinlassöffnung in Strömungsrichtung des Abgases nach dem Partikelfilter in der Abgasanlage angeordnet ist. Exhaust system, wherein the secondary air inlet opening is arranged in the flow direction of the exhaust gas to the particle filter in the exhaust system.
Bei hoher Last und Drehzahl der Brennkraftmaschine wird die At high load and speed of the internal combustion engine is the
Abgastemperatur, insbesondere einer nach dem Ottoprinzip arbeitenden Brennkraftmaschine, durch eine Gemischanreicherung kontrolliert. Dies führt speziell bei Brennkraftmaschinen mit Abgasturboaufladung dazu, dass ca. ein Drittel des Betriebsbereichs der Brennkraftmaschine mit Exhaust gas temperature, in particular an operating according to the Otto principle internal combustion engine, controlled by a mixture enrichment. This leads, especially in internal combustion engines with exhaust turbocharger to the fact that about one third of the operating range of the internal combustion engine with
Kraftstoffüberschuss betrieben wird. Excess fuel is operated.
Der Kraftstoff ü bersch uss führt zu einem hohen Kraftstoffverbrauch und exzessiver CO-Emission, da diese in dem Katalysator nicht zu CO2 oxidiert werden kann. Dieser Mangel gefährdet die Erfüllung neuerer The fuel overshoot results in high fuel consumption and excessive CO emission, as it can not be oxidized to CO2 in the catalyst. This lack endangers the fulfillment of newer
Gesetzesanforderungen zur Abgasemission. Legal requirements for exhaust emission.
Aufgabe der vorliegenden Erfindung ist es, die CO-Emission möglichst vollständig zu eliminieren und in CO2 zu oxidieren. Object of the present invention is to eliminate the CO emission as completely as possible and to oxidize in CO2.
Diese Aufgabe wird durch das Merkmal im kennzeichnenden Teil des Patentanspruchs 1 gelöst. This object is achieved by the feature in the characterizing part of patent claim 1.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben. Advantageous developments of the invention are described in the subclaims.
Mit der nachgeschalteten, zweiten Abgasreinigungsvorrichtung, die insbesondere ein Oxidationskatalysator ist, und der Sekundärluftzufuhr vor der zweiten Abgasreinigungsanlage kann die Brennkraftmaschine weiterhin mit einer Gemischanreicherung betrieben werden und das CO über den Oxidationskatalysator nachoxidiert werden. Da die Oxidation die With the downstream, second emission control device, which is in particular an oxidation catalyst, and the secondary air supply before the second emission control system, the internal combustion engine can continue to be operated with a mixture enrichment and the CO are oxidized via the oxidation catalyst. Since the oxidation of the
Abgastemperatur in der zweiten Abgasreinigungsanlage deutlich erhöht, sollte die zweite Abgasreinigungsanlage möglichst weit entfernt von der Brennkraftmaschine verbaut werden, z. B. integriert in den Exhaust temperature significantly increased in the second emission control system, the second emission control system should be as far away from the Internal combustion engine are installed, z. B. integrated in the
Nachschalldämpfer. Durch ein profiliertes Abgasrohr zwischen der ersten Abgasreinigungsanlage und dem Schalldämpfer, bzw. der zweiten Silencer. Through a profiled exhaust pipe between the first emission control system and the muffler, or the second
Abgasreinigungsvorrichtung, kann die Abgastemperatur bei Eintritt in die zweite Abgasreinigungsvorrichtung möglichst weit abgesenkt werden. Die Sekundärluft sollte nach dem Verdichter des Turboladers und vor dem Ladeluftkühler entnommen werden. Der Sekundärluftmassenstrom kann durch das Wastegate des Abgasturboladers und die Drosselklappe frischluftseitig eingestellt werden. Alternativ kann die Sekundärluft auch durch einen elektrischen Verdichter (E-Booster) bereitgestellt werden. Die zweite Abgasreinigungsanlage kann gleichzeitig als Partikelfilter ausgebildet sein. Das Sekundärluftsystem kann weiter dazu verwendet werden, einen Partikelfilter zu regenerieren. Exhaust gas purification device, the exhaust gas temperature can be lowered as far as possible when entering the second emission control device. The secondary air should be taken after the turbocharger compressor and before the intercooler. The secondary air mass flow can be adjusted by the wastegate of the exhaust gas turbocharger and the throttle valve fresh air side. Alternatively, the secondary air can also be provided by an electric compressor (e-booster). The second emission control system can also be designed as a particle filter. The secondary air system may be further used to regenerate a particulate filter.
Anstelle einer Sekundärluftregelung mittels dem Wastegate des Instead of a secondary air control by means of the wastegate of the
Abgasturboladers und der Drosselklappe kann in der Sekundärluftleitung auch ein Ventil angeordnet sein. Exhaust gas turbocharger and the throttle valve may be arranged in the secondary air line and a valve.
Die erste Abgasreinigungsanlage ist bevorzugt ein Drei-Wege Katalysator oder ein NOx-Speicherkataiysator. The first emission control system is preferably a three-way catalytic converter or a NOx storage catalytic converter.
In einer weiteren Ausführungsform kann die zweite Abgasreinigungsanlage auch ein SCR-Katalysator (Selective Catalytic Reduction) sein. In a further embodiment, the second emission control system may also be an SCR catalytic converter (Selective Catalytic Reduction).
Mit dem erfindungsgemäßen System kann die Brennkraftmaschine weiterhin mit einer Gemischanreicherung in thermisch kritischen Kennfeldbereichen betrieben werden, ohne eine hohe CO Emission zu verursachen. Mit der Gemischanreicherung kann die Brennkraftmaschine weiterhin With the system according to the invention, the internal combustion engine can continue to be operated with a mixture enrichment in thermally critical map areas, without causing a high CO emission. With the mixture enrichment, the internal combustion engine can continue
Leistungsoptimal eingestellt werden. In der Kombination mit einem To be optimally adjusted. In combination with a
Partikelfilter kann der Filter weitgehend unabhängig vom Betriebszustand der Brennkraftmaschine regeneriert werden, da der erforderliche Particulate filter, the filter can be regenerated largely independent of the operating condition of the internal combustion engine, since the required
Sauerstoffüberschuss durch das Sekundärluftsystem bewirkt werden kann. Im Folgenden ist die Erfindung anhand eines Ausführungsbeispiels in einer einzigen Figur näher erläutert. Oxygen excess can be effected by the secondary air system. The invention is explained in more detail below with reference to an embodiment in a single figure.
Figur 1 zeigt schematisch eine Brennkraftmaschine mit einer Abgasanlage. Figure 1 shows schematically an internal combustion engine with an exhaust system.
Figur 1 zeigt schematisch eine Brennkraftmaschine 1 mit einer Abgasanlage 2. Die Abgasanlage 2 dient zum Abführen von Abgas der Figure 1 shows schematically an internal combustion engine 1 with an exhaust system 2. The exhaust system 2 is used for discharging exhaust gas
Brennkraftmaschine 1 . Hierbei strömt das Abgas zuerst durch eine Turbine 3 eines Abgasturboladers und weiter durch ein Abgasrohr und durch eine erste Abgasreinigungsanlage 4. Nach der ersten Abgasreinigungsanlage 4 strömt das Abgas weiter durch ein Abgasrohr und durch einen Schalldämpfer 6 und weiter durch eine zweite Abgasreinigungsanlage 7. Danach verlässt das Abgas durch zwei Endrohre 8 die Abgasanlage 2 und strömt ins Freie. Die zwei Endrohre 8 gelten für dieses Ausführungsbeispiel, die Funktion ist unabhängig von der Zahl der Endrohre 8. Eine Strömungsrichtung des Abgases ist durch zwei Pfeile schematisch dargestellt. Internal combustion engine 1. In this case, the exhaust gas flows first through a turbine 3 of an exhaust gas turbocharger and further through an exhaust pipe and through a first emission control system 4. After the first emission control system 4, the exhaust gas flows through an exhaust pipe and through a silencer 6 and further through a second emission control system 7. Thereafter leaves the exhaust gas through two tailpipes 8, the exhaust system 2 and flows into the open. The two tailpipes 8 apply to this embodiment, the function is independent of the number of tailpipes 8. A flow direction of the exhaust gas is shown schematically by two arrows.
Weiter ist eine Sekundärluftleitung 5 vorgesehen, mit der ein nicht Next, a secondary air line 5 is provided with a not
dargestellter Frischluftstrang der Brennkraftmaschine 1 zwischen einem Verdichter des Abgasturboladers und der Brennkraftmaschine 1 mit der Abgasanlage 2 frischgasführend verbindbar ist. Die Sekundärluftleitung 5 mündet zwischen dem Schalldämpfer 6 und der zweiten shown fresh air train of the internal combustion engine 1 between a compressor of the exhaust gas turbocharger and the internal combustion engine 1 with the exhaust system 2 fresh gas leading connected. The secondary air line 5 opens between the silencer 6 and the second
Abgasreinigungsanlage 7 in die Abgasanlage 2. Ein Frischluftmassenstrom durch die Sekundärluftleitung 5 kann mit einer nicht dargestellten Exhaust gas purification system 7 in the exhaust system 2. A fresh air mass flow through the secondary air line 5 can with a non-illustrated
Drosselklappe bzw. einem nicht dargestellten Bypass des Abgasturboladers oder durch ein ebenfalls nicht dargestelltes Ventil in der Sekundärluftleitung 5 geregelt werden. Throttle or a bypass, not shown, of the exhaust gas turbocharger or by a likewise not shown valve in the secondary air line 5 are regulated.
In einem ersten Ausführungsbeispiel ist die erste Abgasreinigungsanlage 4 ein Drei-Wege Katalysator, in einem zweiten Ausführungsbeispiel kann es sich um einen NOx -Speicherkatalysator handeln. Die zweite Abgasreinigungsanlage 7 ist bevorzugt ein Drei-Wege In a first embodiment, the first emission control system 4 is a three-way catalyst, in a second embodiment, it may be a NOx storage catalyst. The second emission control system 7 is preferably a three-way
Katalysator, kann jedoch in anderen Ausführungsbeispielen auch ein SCR- Katalysator (Selective Catalytic Reduction) oder ein Partikelfilter sein, wobei der Partikelfilter auch beschichtet sein kann und zusätzlich als Katalysator arbeiten kann. Catalyst, however, in other embodiments may also be an SCR catalyst (Selective Catalytic Reduction) or a particulate filter, wherein the particulate filter may also be coated and may additionally work as a catalyst.
Bevorzugt ist zumindest ein Abschnitt der Abgasrohre der Abgasanlage 2 profiliert, damit das Abgas welches durch die Abgasanlage 2 strömt bis zum Auftreffen auf die zweite Abgasreinigungsanlage 7 möglichst weit abgekühlt ist. In einem weiteren Ausführungsbeispiel ist das Abgasrohr zwischen dem Turbinenaustritt und der ersten Abgasreinigungsanlage 4 als Einlauftrichter für die erste Abgasreinigungsanlage 4 ausgebildet, sodass dieser Preferably, at least a portion of the exhaust pipes of the exhaust system 2 is profiled, so that the exhaust gas flowing through the exhaust system 2 is cooled as far as possible until it hits the second emission control system 7. In a further embodiment, the exhaust pipe between the turbine outlet and the first exhaust gas purification system 4 is designed as an inlet funnel for the first exhaust gas purification system 4, so that this
Abgasrohrabschnitt entfällt. In diesem Fall sollte das Abgasrohr zwischen der ersten Abgasreinigungsanlage 4 und dem Schalldämpfer 6 zur besseren Kühlung profiliert werden. Exhaust pipe section is omitted. In this case, the exhaust pipe should be profiled between the first exhaust gas purification system 4 and the muffler 6 for better cooling.
Bevorzugt sind der Schalldämpfer 6 und die zweite Abgasreinigungsanlage 7 in einem gemeinsamen Gehäuse in Strömungsrichtung des Abgases voneinander beabstandet angeordnet. In einem anderen Ausführungsbeispiel kann für den Schalldämpfer 6 und die zweite Abgasreinigungsanlage 7 auch jeweils ein separates Gehäuse vorgesehen werden. Preferably, the muffler 6 and the second emission control system 7 are arranged in a common housing in the flow direction of the exhaust gas spaced from each other. In another embodiment, a separate housing may be provided for the muffler 6 and the second emission control system 7, respectively.
Mit dem erfindungsgemäßen System kann die Brennkraftmaschine weiterhin mit einer Gemischanreicherung in thermisch kritischen Kennfeldbereichen betrieben werden, ohne hohe CO-Emissionen zu verursachen. Mit der Gemischanreicherung kann die Brennkraftmaschine weiterhin With the system according to the invention, the internal combustion engine can continue to be operated with a mixture enrichment in thermally critical map areas, without causing high CO emissions. With the mixture enrichment, the internal combustion engine can continue
leistungsoptimal eingestellt werden. In der Kombination mit einem be adjusted optimal performance. In combination with a
Partikelfilter kann der Filter weitgehend unabhängig vom Betriebszustand der Brennkraftmaschine regeneriert werden, da der erforderliche Particulate filter, the filter can be regenerated largely independent of the operating condition of the internal combustion engine, since the required
Sauerstoffüberschuss durch das Sekundärluftsystem eingestellt werden kann. Oxygen excess can be adjusted by the secondary air system.
BEZUGSZEICHENLISTE LIST OF REFERENCE NUMBERS
1 . Brennkraftmaschine 1 . Internal combustion engine
2. Abgasanlage  2nd exhaust system
3. Turbine  3rd turbine
4. erste Abgasreinigungsvorrichtung 4. first emission control device
5. Sekundärluftleitung 5. Secondary air line
6. Schalldämpfer  6. Silencer
7. zweite Abgasreinigungsvorrichtung 7. second emission control device
8. Endrohr 8. tailpipe

Claims

Brennkraftmaschine mit einer Abgasanlage PATENTANSPRÜCHE Internal combustion engine with an exhaust system PATENT CLAIMS
1 . Brennkraftmaschine (1 ) mit einer Abgasanlage (2), zum Abführen von Abgas der Brennkraftmaschine (1 ), wobei die Brennkraftmaschine (1 ) einen Abgasturbolader mit einer Turbine (3) und einem Verdichter aufweist, wobei die Turbine (3) in der Abgasanlage (2) zwischen der Brennkraftmaschine (1 ) und einer ersten Abgasreinigungsvorrichtung (4) und der Verdichter in einem Frischluftstrang der Brennkraftmaschine (1 ) angeordnet ist und wobei eine Sekundärluftleitung (5) vorgesehen ist, mit der der Frischluftstrang zwischen dem Verdichter und der Brennkraftmaschine (1 ) mit der Abgasanlage (2) Frischgas führend verbindbar ist, wobei in der Abgasanlage (2) in Strömungsrichtung des Abgases hinter der ersten Abgasreinigungsvorrichtung (4) ein 1 . Internal combustion engine (1) with an exhaust system (2), for discharging exhaust gas of the internal combustion engine (1), wherein the internal combustion engine (1) comprises an exhaust gas turbocharger with a turbine (3) and a compressor, wherein the turbine (3) in the exhaust system ( 2) between the internal combustion engine (1) and a first exhaust gas purification device (4) and the compressor in a fresh air line of the internal combustion engine (1) is arranged and wherein a secondary air line (5) is provided, with the fresh air line between the compressor and the internal combustion engine (1 ) with the exhaust system (2) fresh gas leader is connected, wherein in the exhaust system (2) in the flow direction of the exhaust gas behind the first exhaust gas purification device (4) a
Schalldämpfer (6) vorgesehen ist,  Silencer (6) is provided
dadurch gekennzeichnet, dass in der Abgasanlage (2), in  characterized in that in the exhaust system (2), in
Strömungsrichtung des Abgases hinter dem Schalldämpfer (6) eine zweite Abgasreinigungsvorrichtung (7) angeordnet ist und die  Flow direction of the exhaust gas behind the muffler (6) a second emission control device (7) is arranged and the
Sekundärluftleitung (5) zwischen dem Schalldämpfer (6) und der zweiten Abgasreinigungsvorrichtung (7) in die Abgasanlage (2) mündet. Secondary air line (5) between the muffler (6) and the second emission control device (7) opens into the exhaust system (2).
2. Brennkraftmaschine mit einer Abgasanlage nach Patentanspruch 1 , dadurch gekennzeichnet, dass in der Sekundärluftleitung (5) ein Ventil angeordnet ist. 2. Internal combustion engine with an exhaust system according to claim 1, characterized in that in the secondary air line (5), a valve is arranged.
3. Brennkraftmaschine mit einer Abgasanlage nach Patentanspruch 1 oder 2, 3. Internal combustion engine with an exhaust system according to claim 1 or 2,
dadurch gekennzeichnet, dass die erste Abgasreinigungsanlage (4) ein Drei-Wege-Katalysator oder ein NOx-Speicherkatalysator ist.  characterized in that the first emission control system (4) is a three-way catalytic converter or a NOx storage catalytic converter.
4. Brennkraftmaschine mit einer Abgasanlage nach einem der 4. Internal combustion engine with an exhaust system according to one of
Patentansprüche 1 bis 3,  Claims 1 to 3,
dadurch gekennzeichnet, dass die zweite Abgasreinigungsanlage (7) ein Drei-Wege-Katalysator oder ein SCR-Katalysator (selective catalytic reduction) oder ein Partikelfilter ist.  characterized in that the second emission control system (7) is a three-way catalytic converter or an SCR catalytic converter (selective catalytic reduction) or a particle filter.
5. Brennkraftmaschine mit einer Abgasanlage nach einem der 5. Internal combustion engine with an exhaust system according to one of
Patentansprüche 1 bis 4,  Claims 1 to 4,
dadurch gekennzeichnet, dass die Abgasanlage (2) für eine hohe Wärmeabfuhr profiliert ist.  characterized in that the exhaust system (2) is profiled for a high heat dissipation.
EP18773943.8A 2017-10-23 2018-09-06 Internal combustion engine with an exhaust gas system Withdrawn EP3701132A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017218838.3A DE102017218838A1 (en) 2017-10-23 2017-10-23 Internal combustion engine with an exhaust system
PCT/EP2018/073950 WO2019081109A1 (en) 2017-10-23 2018-09-06 Internal combustion engine with an exhaust gas system

Publications (1)

Publication Number Publication Date
EP3701132A1 true EP3701132A1 (en) 2020-09-02

Family

ID=63683131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18773943.8A Withdrawn EP3701132A1 (en) 2017-10-23 2018-09-06 Internal combustion engine with an exhaust gas system

Country Status (3)

Country Link
EP (1) EP3701132A1 (en)
DE (1) DE102017218838A1 (en)
WO (1) WO2019081109A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019103001A1 (en) 2019-02-07 2020-08-13 Bayerische Motoren Werke Aktiengesellschaft Particulate filter assembly for motor vehicles, motor vehicles and methods for regenerating a particle filter
DE102020107130A1 (en) 2020-03-16 2021-09-16 Bayerische Motoren Werke Aktiengesellschaft Exhaust system with several exhaust gas cleaning devices and secondary air

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048092A (en) * 1973-03-05 1977-09-13 Colonial Metals, Inc. Catalytic mixture and method of use therefor
JPS5517626A (en) * 1978-07-20 1980-02-07 Nippon Clean Engine Res Feeding method of secondary air to catalytic muffler of internal combustion engine
US5783160A (en) * 1995-01-27 1998-07-21 Toyota Jidosha Kabushiki Kaisha Method for purifying combustion exhaust gas
KR100287050B1 (en) * 1995-11-09 2001-05-02 와다 아끼히로 Method and apparatus for purifying exhaust gas of an engine
US6122909A (en) * 1998-09-29 2000-09-26 Lynntech, Inc. Catalytic reduction of emissions from internal combustion engines
DE10258850A1 (en) * 2002-12-17 2004-07-08 Volkswagen Ag Device for the aftertreatment of exhaust gases from an internal combustion engine
US8327628B2 (en) * 2009-09-29 2012-12-11 Ford Global Technologies, Llc Gasoline particulate filter regeneration and diagnostics
DE102010044102A1 (en) 2010-11-18 2012-05-24 Ford Global Technologies, Llc Exhaust system for internal combustion engines with particle filter
US9347358B1 (en) * 2014-11-26 2016-05-24 General Electric Company Silencer for mid-bed air injection mixing
DE102016204691A1 (en) * 2016-03-22 2017-09-28 Volkswagen Aktiengesellschaft Apparatus and method for regeneration of a particulate filter
DE102017203267A1 (en) 2017-03-01 2018-09-06 Bayerische Motoren Werke Aktiengesellschaft Internal combustion engine with an exhaust system

Also Published As

Publication number Publication date
DE102017218838A1 (en) 2019-04-25
WO2019081109A1 (en) 2019-05-02

Similar Documents

Publication Publication Date Title
EP2183471B1 (en) Exhaust-gas secondary treatment preceding a turbocharger
WO2009077033A1 (en) Internal combustion engine and method for controlling an internal combustion engine in a motor vehicle
DE102010005814A1 (en) Exhaust gas system for internal combustion engine of passenger car, has exhaust manifold which is connected with exhaust tract in gas guiding manner, in which exhaust turbocharger is arranged
EP3701131A1 (en) Internal combustion engine with an exhaust gas system
DE102009004418A1 (en) A method for the aftertreatment of an exhaust gas stream of a multi-cylinder internal combustion engine of a vehicle and exhaust aftertreatment device
DE102004009791A1 (en) A method for accelerated heating of a cleaning device in the exhaust system of an internal combustion engine and internal combustion engine
EP2977577B1 (en) Exhaust system and motor vehicle
WO2019166529A1 (en) Low-pressure egr system with turbo bypass
EP3701132A1 (en) Internal combustion engine with an exhaust gas system
DE102015216751A1 (en) Motor vehicle with exhaust gas recirculation
EP1619365B1 (en) Exhaust gas after-treatment with sequential supercharging
EP2057361B1 (en) Exhaust gas line for an internal combustion engine
DE102018104599A1 (en) Low pressure EGR system with turbo bypass
WO2010072227A1 (en) Exhaust gas recirculation system and method for exhaust gas recirculation
DE102009020625A1 (en) Internal combustion engine i.e. diesel engine, for motor vehicle, has oxidation catalyzer arranged upstream to turbine of turbocharger in surges provided for recycling exhaust gas, and switching device provided upstream to catalyzer
DE102013008827A1 (en) Charged internal combustion engine
EP1662106B1 (en) Exhaust system for an internal combustion engine
EP3431727A1 (en) Combustion engine with exhaustturbocharger
WO2019201546A1 (en) Internal combustion engine with an exhaust gas system
DE102015223495A1 (en) A chargeable internal combustion engine and method of operating a chargeable internal combustion engine
DE102020107130A1 (en) Exhaust system with several exhaust gas cleaning devices and secondary air
DE102015216730A1 (en) Motor vehicle with exhaust gas recirculation
DE102016219774B4 (en) System for a motor vehicle and method for operating an internal combustion engine for a motor vehicle
DE102018120179B4 (en) Exhaust tract for an internal combustion engine and internal combustion engine
DE102016212251A1 (en) Two-stage rechargeable internal combustion engine with exhaust aftertreatment and method for operating such an internal combustion engine

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200421

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20201215

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230523