DE102006015390A1 - Internal combustion engine with secondary air pump assisted supercharger has secondary air source with front connected via first pressure line to exhaust system and via second pressure line to induction pipe of internal combustion engine - Google Patents
Internal combustion engine with secondary air pump assisted supercharger has secondary air source with front connected via first pressure line to exhaust system and via second pressure line to induction pipe of internal combustion engine Download PDFInfo
- Publication number
- DE102006015390A1 DE102006015390A1 DE102006015390A DE102006015390A DE102006015390A1 DE 102006015390 A1 DE102006015390 A1 DE 102006015390A1 DE 102006015390 A DE102006015390 A DE 102006015390A DE 102006015390 A DE102006015390 A DE 102006015390A DE 102006015390 A1 DE102006015390 A1 DE 102006015390A1
- Authority
- DE
- Germany
- Prior art keywords
- internal combustion
- combustion engine
- secondary air
- pressure line
- air pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F02B37/007—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in parallel, e.g. at least one pump supplying alternatively
-
- 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
-
- 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
- F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
- F02B37/10—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump at least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an engine-driven pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
- F02B37/225—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits air passages
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Stand der TechnikState of technology
Zur Verbesserung der Abgasemission von Verbrennungskraftmaschinen wird im Rahmen der heute üblichen katalytischen Nachbehandlung die thermische Nachverbrennung eingesetzt. Mit diesem Verfahren lassen sich die im Abgas noch vorhandenen, unverbrannten Bestandteile durch eine gewisse Verweilzeit bei hohen Temperaturen nachverbrennen. Bei fetter Motorabstimmung (λ = 0,7 ... bis 1,0) ist dazu eine Lufteinblasung (Sekundärlufteinblasung) erforderlich. Bei magerer Motorabstimmung (λ = 1,05 ... bis 1,2) erfolgt die Nachverbrennung durch den im Abgas noch vorhandenen Restsauerstoff.to Improvement of the exhaust emission of internal combustion engines is in the context of today's usual catalytic post-treatment used the thermal afterburning. With this method, the remaining in the exhaust, unburned constituents by a certain residence time at high Burn temperatures. For rich engine tuning (λ = 0.7 ... to 1.0) requires air injection (secondary air injection). In lean engine tuning (λ = 1.05 ... to 1.2), the post-combustion is carried out by the exhaust gas remaining oxygen remaining.
Zur Sekundärlufteinblasung wurden in der Vergangenheit mechanische Pumpen verwendet, die über Riemen direkt vom Verbrennungsmotor angetrieben werden. Da die Einblasung nur in der Warmlaufphase des Motors erforderlich ist, sind solche Pumpen mit Hilfe von Elektrokupplungen abschaltbar. Kostengünstig elektromotorisch angetriebene Gebläsepumpen verdrängen die mechanischen Pumpen zunehmend. Wegen des nichtvorhandenen Potentials, insbesondere zur Einhaltung niedriger NOx-Grenzwerte, ist die thermische Nachbehandlung des Abgases für sich allein derzeit von untergeordneter Bedeutung. Mit ihr kann jedoch die Emission von HC und CO in der Warmlaufphase gesenkt werden, solange der Abgaskatalysator seine Betriebstemperatur noch nicht erreicht hat. Zur Einhaltung scharfer Abgasgrenzwerte spielt die Anwendung der thermischen Nachbehandlung mit Lufteinblasung während der Warmlaufphase des Motors in Kombination mit katalytischer Nachbehandlung eine wesentliche Rolle, um die Aufheizzeit bis zum Erreichen der Betriebstemperatur des Katalysators deutlich zu verkürzen.For secondary air injection, mechanical pumps have been used in the past, which are driven by belts directly from the internal combustion engine. Since the injection is required only in the warm-up phase of the engine, such pumps with the aid of electric clutches are switched off. Cost-effective electric motor-driven blower pumps increasingly displace the mechanical pumps. Because of the non-existent potential, in particular to maintain low NO x limits, the thermal aftertreatment of the exhaust gas is currently of secondary importance. With it, however, the emission of HC and CO can be reduced in the warm-up phase, as long as the catalytic converter has not yet reached its operating temperature. In order to comply with strict exhaust emission limits, the use of thermal aftertreatment with air injection during the warm-up phase of the engine in combination with catalytic aftertreatment plays an essential role in significantly shortening the heating time until the operating temperature of the catalytic converter is reached.
Offenbarung der Erfindungepiphany the invention
Der Erfindung liegt die Aufgabe zugrunde, insbesondere in der Beschleunigungsphase einer Verbrennungskraftmaschine mit Aufladeeinrichtung, der Verbrennungskraftmaschine zusätzliche Luft zuzuführen, um den Aufbau des Drehmomentes zu beschleunigen.Of the Invention is the object of the invention, especially in the acceleration phase an internal combustion engine with charging device, the internal combustion engine additional To supply air, to accelerate the buildup of torque.
Erfindungsgemäß wird vorgeschlagen, an heutigen Verbrennungskraftmaschinen eingesetzte Aufladeeinrichtungen durch eine Sekundärluftpumpe zu unterstützen. In vielen Kraftfahrzeugen, insbesondere wenn diese in Staaten mit strenger Abgasgesetzgebung in den Verkehr gelangen sollen, wird ein chemisches Heizen des Abgaskatalysators vorgenommen. Die Verbrennungskraftmaschine wird während der Startphase und der Warmlaufphase mit einem angefetteten Gemisch (λ < 1) betrieben, wobei über die Sekundärluftpumpe Luft in das Abgassystem geblasen wird, um HC- und CO-Anteile im Abgas zu senken. Die eingesetzte Sekundärluftpumpe kann nun dazu eingesetzt werden, die über sie geförderte Frischluft sowohl in den Abgastrakt der Verbrennungskraftmaschine als auch in den Ansaugtrakt zu leiten und auf diese Weise die Füllung der Zylinder einer mehrzylindrigen Verbrennungskraftmaschine mit Verbrennungsluft zu verbessern. Dies ist insbesondere dann von Bedeutung, wenn eine bevorzugt als Abgasturbolader ausgebildete Aufladeeinrichtung an der Verbrennungskraftmaschine aufgrund der geringen Drehzahl der Verbrennungskraftmaschine und trägem Ansprechverhalten noch nicht in vollem Umfang zum Aufbau eines ausreichenden Druckes im Ansaugtrakt beschleunigt hat. Dieser Umstand wird im Allgemeinen als „Turboloch" bezeichnet und tritt immer dann auf, wenn die Verbrennungskraftmaschine mit einer bevorzugt als Abgasturbolader ausgeführten Aufladeeinrichtung stark beschleunigt. Zwischen der durch den Fahrer angeforderten Momentenerhöhung und einer starken, durch die Verbrennungskraftmaschine erzeugten Steigerung des Drehmomentes vergeht im Allgemeinen einige Zeit, bis die Aufladeeinrichtung so stark beschleunigt hat, dass die Füllung der Zylinder der Verbrennungskraftmaschine mit Verbrennungsluft so weit gesteigert ist, dass der Drehmomentenwunsch des Fahrers umgesetzt werden kann.According to the invention, it is proposed Chargers used on today's internal combustion engines through a secondary air pump too support. In many motor vehicles, especially when used in states with strict emission legislation is to be put on the market a chemical heating of the catalytic converter made. The internal combustion engine is during the starting phase and the warm-up phase with a greased mixture (λ <1), wherein over the Secondary air pump Air is blown into the exhaust system to HC and CO levels in the Lower exhaust. The secondary air pump used can now be used for this purpose be over she promoted fresh air both in the exhaust tract of the internal combustion engine as well to guide in the intake tract and in this way the filling of the Cylinder of a multi-cylinder internal combustion engine with combustion air to improve. This is particularly important if a preferably designed as an exhaust gas turbocharger supercharger on the Internal combustion engine due to the low speed of the internal combustion engine and sluggish Responses are not yet fully developed to build up a sufficient Has accelerated pressure in the intake tract. This circumstance is in the Generally referred to as "turbo lag" and always occurs then, if the internal combustion engine with a preferred designed as an exhaust gas turbocharger Charger greatly accelerated. Between by the driver requested torque increase and a strong, produced by the internal combustion engine Increasing the torque generally takes some time, until the charging device has accelerated so much that the filling of the Cylinder of the internal combustion engine with combustion air so far increased, that the torque request of the driver implemented can be.
Der Sekundärluftpumpe, die zum Einblasen von Frischluft in den Abgastrakt der Verbrennungskraftmaschine eingesetzt wird, ist ein Schaltventil zugeordnet. Mittels des Schaltventiles wird die von der Sekundärluftpumpe geförderte Luft ihrem Bestimmungsort zugeführt, was entweder direkt an eine entsprechende Stelle im Abgastrakt erfolgen kann oder gegebenenfalls unter Zwischenschaltung eines Druckspeichers an eine Stelle in den Ansaugtrakt. Die von der Sekundärluftpumpe oder einem zusätzlich hinter dem Schaltventil angeordnete Druckspeicher, der von der Sekundärluftpumpe gespeist wird, gelieferte Frischluft wird entweder in den Ansaugtrakt der Verbrennungskraftmaschine, insbesondere in das Saugrohr, eingeblasen oder andererseits bei entsprechender Schaltstellung des Schaltventiles wird die über die Sekundärluftpumpe gelieferte Luft in den Abgastrakt, insbesondere vor einem im Abgastrakt der Verbrennungskraftmaschine untergebrachten Abgaskatalysator in den Abgastrakt geleitet. Abhängig von der Steuerstrategie der Sekundärluftpumpe kann in der Start- beziehungsweise Warmlaufphase der Verbrennungskraftmaschine über die Sekundärluftpumpe Frischluft in den Abgaskatalysator geleitet werden, um die Abgasemissionen hinsichtlich zulässiger HC- beziehungsweise CO-Werte im Abgas zu verbessern und andererseits in starken Beschleunigungsphasen der Verbrennungskraftmaschine, die in der Regel nach der Start- beziehungsweise der Warmlaufphase auftreten, über die Sekundärluftpumpe beziehungsweise einem dieser zusätzlich zugeordneten Druckspeicher, der vorzugsweise zwischen dem Schaltventil und einer Mündungsstelle einer Leitung in dem Ansaugtrakt angeordnet ist, Frischluft in diesen eingeleitet werden. Die Frischluft wird über die Sekundärluftpumpe beziehungsweise einen zusätzlich der Sekundärluftpumpe zugeordneten Druckspeicher im Ansaugrohr vorzugsweise hinter dem Verdichterteil der Aufladeeinrichtung und vorzugsweise, jedoch nicht zwingend, hinter einer Drosselklappeneinrichtung in den Ansaugtrakt geleitet, so dass die über die Sekundärluftpumpe beziehungsweise den zusätzlich der Sekundärluftpumpe zugeordneten Druckspeicher eingebrachte Verbrennungsluft unmittelbar in die Zylinder der mehrzylindrigen Verbrennungskraftmaschine gelangt.The secondary air pump, which is used for blowing fresh air into the exhaust tract of the internal combustion engine, is assigned a switching valve. By means of the switching valve, the air conveyed by the secondary air pump is supplied to its destination, which can either be done directly to a corresponding point in the exhaust system or optionally with the interposition of a pressure accumulator to a point in the intake. The arranged by the secondary air pump or an additional downstream of the switching valve pressure accumulator, which is fed by the secondary air pump supplied fresh air is blown either in the intake of the internal combustion engine, in particular in the intake manifold, or on the other hand, with appropriate switching position of the switching valve, the supplied via the secondary air pump air directed into the exhaust system, in particular in front of a housed in the exhaust system of the internal combustion engine exhaust gas catalyst in the exhaust system. Depending on the control strategy of the secondary air pump fresh air can be passed into the catalytic converter in the start or warm-up phase of the internal combustion engine via the secondary air pump to improve the exhaust emissions with respect to allowable HC or CO values in the exhaust gas and on the other hand in strong acceleration phases of the internal combustion engine usually occur after the start or the warm-up phase, via the secondary air pump or one of these additionally supplied arranged pressure accumulator, which is preferably arranged between the switching valve and an opening point of a line in the intake, fresh air are introduced into this. The fresh air is passed via the secondary air pump or an additional secondary air pump accumulator in the intake preferably behind the compressor part of the charger and preferably, but not mandatory, behind a throttle valve device in the intake so that introduced via the secondary air pump or the secondary air pump associated pressure accumulator Combustion air passes directly into the cylinder of the multi-cylinder internal combustion engine.
Zeichnungdrawing
Anhand der Zeichnung wird die Erfindung nachstehend näher erläutert. Es zeigt:Based the drawing, the invention is explained in more detail below. It shows:
Ausführungsbeispieleembodiments
Aus
der Darstellung gemäß
Der
Darstellung gemäß
Aus
der Darstellung gemäß
Die
in
In der Start- beziehungsweise der Warmlaufphase der
Verbrennungskraftmaschine
In the start or warm-up phase of the internal combustion engine
Anstelle
der in Zusammenhang mit
Durch
die in den
Mit
der erfindungsgemäß vorgeschlagenen Lösung durch
Einsatz der Sekundärluftpumpe
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006015390A DE102006015390A1 (en) | 2006-04-03 | 2006-04-03 | Internal combustion engine with secondary air pump assisted supercharger has secondary air source with front connected via first pressure line to exhaust system and via second pressure line to induction pipe of internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006015390A DE102006015390A1 (en) | 2006-04-03 | 2006-04-03 | Internal combustion engine with secondary air pump assisted supercharger has secondary air source with front connected via first pressure line to exhaust system and via second pressure line to induction pipe of internal combustion engine |
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Publication Number | Publication Date |
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DE102006015390A1 true DE102006015390A1 (en) | 2007-10-04 |
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DE102006015390A Withdrawn DE102006015390A1 (en) | 2006-04-03 | 2006-04-03 | Internal combustion engine with secondary air pump assisted supercharger has secondary air source with front connected via first pressure line to exhaust system and via second pressure line to induction pipe of internal combustion engine |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009103590A1 (en) * | 2008-02-18 | 2009-08-27 | Zf Friedrichshafen Ag | Method and device for controlling a compressed air supply of an internal combustion engine and other devices |
DE102011002500A1 (en) | 2011-01-11 | 2012-07-12 | Robert Bosch Gmbh | Method for operating exhaust control system of internal combustion engine, involves introducing partially air into exhaust channel in flow direction of exhaust gases before exhaust gas purifying components |
WO2013159925A1 (en) * | 2012-04-25 | 2013-10-31 | Peter Kreuter | Method for operating an exhaust-gas-turbocharged internal combustion engine |
US11536213B2 (en) | 2021-05-19 | 2022-12-27 | Deere & Company | Engine system with electrified air system components for managing emissions of nitrogen oxides in a work vehicle |
US11572673B2 (en) | 2021-06-25 | 2023-02-07 | Deere & Company | Work vehicle power system with decoupled engine air system components |
US11572824B2 (en) | 2021-05-13 | 2023-02-07 | Deere & Company | Electrified engine boost components for mitigating engine stalling in a work vehicle |
US11591992B2 (en) | 2021-05-05 | 2023-02-28 | Deere & Company | Engine system with air pump for enhanced turbocharger air exchange |
US11846257B2 (en) | 2021-05-03 | 2023-12-19 | Deere & Company | Engine system with reversible exhaust gas recirculation pump for controlling bypass flow |
US11939929B2 (en) | 2021-08-19 | 2024-03-26 | Deere &Company | Engine electrified air system including electric turbocharger and exhaust gas recirculation pump |
US12123379B2 (en) | 2022-03-28 | 2024-10-22 | Deere & Company | Dual core exhaust gas recirculation cooler |
-
2006
- 2006-04-03 DE DE102006015390A patent/DE102006015390A1/en not_active Withdrawn
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009103590A1 (en) * | 2008-02-18 | 2009-08-27 | Zf Friedrichshafen Ag | Method and device for controlling a compressed air supply of an internal combustion engine and other devices |
DE102011002500A1 (en) | 2011-01-11 | 2012-07-12 | Robert Bosch Gmbh | Method for operating exhaust control system of internal combustion engine, involves introducing partially air into exhaust channel in flow direction of exhaust gases before exhaust gas purifying components |
WO2013159925A1 (en) * | 2012-04-25 | 2013-10-31 | Peter Kreuter | Method for operating an exhaust-gas-turbocharged internal combustion engine |
US11846257B2 (en) | 2021-05-03 | 2023-12-19 | Deere & Company | Engine system with reversible exhaust gas recirculation pump for controlling bypass flow |
US11591992B2 (en) | 2021-05-05 | 2023-02-28 | Deere & Company | Engine system with air pump for enhanced turbocharger air exchange |
US11572824B2 (en) | 2021-05-13 | 2023-02-07 | Deere & Company | Electrified engine boost components for mitigating engine stalling in a work vehicle |
US11536213B2 (en) | 2021-05-19 | 2022-12-27 | Deere & Company | Engine system with electrified air system components for managing emissions of nitrogen oxides in a work vehicle |
US11572673B2 (en) | 2021-06-25 | 2023-02-07 | Deere & Company | Work vehicle power system with decoupled engine air system components |
US11939929B2 (en) | 2021-08-19 | 2024-03-26 | Deere &Company | Engine electrified air system including electric turbocharger and exhaust gas recirculation pump |
US12123379B2 (en) | 2022-03-28 | 2024-10-22 | Deere & Company | Dual core exhaust gas recirculation cooler |
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