DE10242767A1 - Supply of secondary air to automotive exhaust gas system during warm-up phase involves using system in which engine cylinders has non cam-driven inlet and outlet valve system which is regulated by electronic control unit - Google Patents
Supply of secondary air to automotive exhaust gas system during warm-up phase involves using system in which engine cylinders has non cam-driven inlet and outlet valve system which is regulated by electronic control unit Download PDFInfo
- Publication number
- DE10242767A1 DE10242767A1 DE10242767A DE10242767A DE10242767A1 DE 10242767 A1 DE10242767 A1 DE 10242767A1 DE 10242767 A DE10242767 A DE 10242767A DE 10242767 A DE10242767 A DE 10242767A DE 10242767 A1 DE10242767 A1 DE 10242767A1
- Authority
- DE
- Germany
- Prior art keywords
- secondary air
- cylinder
- air
- exhaust
- exhaust gas
- 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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
- F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
-
- 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
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0261—Controlling the valve overlap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0276—Actuation of an additional valve for a special application, e.g. for decompression, exhaust gas recirculation or cylinder scavenging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
-
- 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
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 After Treatment (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Sekundärluft-Zuführung in die Abgasanlage einer Brennkraftmaschine.The invention relates to a Process for secondary air supply in the exhaust system of an internal combustion engine.
Die Sekundärlufteinblasung dient bekanntlich bei Kaltstart und anschließendem Warmlauf der Brennkraftmaschine zum schnelleren Aufheizen eines insbesondere motorfernen Katalysators. Hierbei wird Frischluft zur nachträglichen Verbrennung von Abgasbestandteilen möglichst nahe einem Auslassventil eines Zylinders der Brennkraftmaschine dem Abgasstrom über ein Leitungssystem zugeführt. Das Leitungssystem umfasst eine mit einer Druckquelle verbundene Zuleitung zu einer Verteilerleitung mit zumindest entsprechend der Anzahl der Zylinder vorgesehenen Einblassstellen. Als Druckquelle dient vorwiegend eine gesonderte Pumpe. Zur Aktivierung bzw. zur Deaktivierung der Sekundärlufteinblasung umfasst das Leitungssystem in der Zuleitung ein von vorbestimmten Parametern der Brennkraftmaschine oder der Abgasanlage abhängig schaltbares Ventil, das zusätzlich mit einem Rückschlagventil kombiniert ist.As is known, the secondary air injection serves at cold start and afterwards Warm-up of the internal combustion engine to heat up a faster in particular, a catalyst remote from the engine. Here fresh air becomes later Combustion of exhaust gas components as close as possible to an exhaust valve of a cylinder of the internal combustion engine to the exhaust gas flow Line system fed. The line system includes one connected to a pressure source Supply line to a distribution line with at least according to the Number of injection points provided for cylinders. As a pressure source mainly serves a separate pump. For activation or for Deactivation of secondary air injection includes the line system in the supply line one of predetermined parameters the internal combustion engine or the exhaust system switchable valve that additionally with a check valve is combined.
Eine derartige Anordnung ist beispielsweise in
schematischer Darstellung aus der
Aus der
Eine verbesserte Steuerung der Sekundärluft mittels
eines membranbetätigten
Sekundärluft-Ventils
erscheint mit der Zuführ-Vorrichtung
gemäß der
Ferner ist es im Stand der Technik bekannt, Sekundärluft über in der Abgasleitung herrschenden Unterdruck mittels einer Leitungsanordnung über ein Rückschlagventil anzusaugen, das bei Überdruck schließt.It is also in the prior art known secondary air over in the Exhaust pipe prevailing negative pressure by means of a line arrangement via a check valve suction that closes when overpressure.
Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Verfahren mit geringerem Bauaufwand durch eine Nutzung vorhandener Einrichtungen durchzuführen.The invention is based on the object generic method with less construction effort by using existing facilities perform.
Diese Aufgabe ist mit dem Patentanspruch 1 dadurch gelöst, dass bei einer mehrzylindrigen Brennkraftmaschine mit nockenwellenlosem Ventiltrieb mit mittels einer elektronischen Steuerung variabel steuerbaren Gaswechselventilen sowie mit einer funktionell gekoppelten Zylinderabschalteinrichtung aus einem unbefeuerten Zylinder mit mindestens je einem vorbestimmt gesteuert betätigten Ein- und Auslass-Ventil eine jeweilig angesaugte und komprimierte Luftmenge im wesentlichen der Abgasanlage als Sekundärluft zugeführt wird.This task is with the claim 1 solved by that in a multi-cylinder internal combustion engine with camshaft-less Valve train with variable by means of an electronic control controllable gas exchange valves as well as with a functionally coupled Cylinder deactivation device with an unfired cylinder at least one inlet and outlet valve operated in a predetermined manner, one in each case sucked and compressed amount of air essentially the exhaust system as secondary air supplied becomes.
Mit der Erfindung kann auf ein herkömmliches Einblassystem für Sekundärluft aus Gründen des Energieverbrauches und des Mehrgewichtes verzichtet werden. Sie bietet aber auch den Vorteil der zusätzlichen Verwendung eines derartigen Einblassystems mit geringst möglichem Bauaufwand für den Fall, dass bei einem Kaltstart der Brennkraftmaschine die Zylinderabschalteinrichtung aus funktionellen oder anderen Gründen nicht aktivierbar ist, so dass Sekundärluft über dieses Ersatzsystem zugeführt wird.With the invention, a conventional Injection system for secondary air for the sake of Energy consumption and additional weight can be dispensed with. she but also offers the advantage of additional use of such Injection system with the least possible Construction effort for the Case that when the internal combustion engine starts cold, the cylinder deactivation device cannot be activated for functional or other reasons, so secondary air over this Replacement system fed becomes.
An nockenwellenlosen Ventiltrieben
sind bekannt ein pneumatischer Ventiltrieb, z. B. gemäß der
In weiterer Ausgestaltung der Erfindung wird vorgeschlagen, dass die Luftmenge im unbefeuerten Zylinder durch relativ frühes Öffnen des Auslassventils höher komprimiert und damit als höher temperierte Sekundärluft der Abgasanlage zugeführt wird.In a further embodiment of the invention it is suggested that the amount of air in the unfired cylinder by opening the Exhaust valve higher compressed and thus as higher tempered secondary air fed to the exhaust system becomes.
Mit dieser Verfahrensmaßnahme kann die vom herkömmlichen Reaktionsort nahe dem jeweiligen Auslassventil entfernt in der Abgasleitung stattfindende Reaktion von Sekundärluft und Abgas kompensiert werden, wobei die erhöhte Temperatur der Sekundärluft einerseits über die angesaugte Luftmenge und andererseits über das durch den Öffnungszeitpunkt des Auslassventils beeinflussbare Maß der Kompression bestimmbar ist. Durch die höher temperierte Sekundärluft ist insbesondere eine für motorfern angeordnete Katalysatoren erforderliche, temperatursteigernde Abgas-Nachverbrennung sicher erzielt.With this method measure, the distance from the conventional reaction location near the respective outlet valve can take place in the exhaust line Finding reaction of secondary air and exhaust gas can be compensated, wherein the elevated temperature of the secondary air can be determined on the one hand via the amount of air sucked in and on the other hand via the degree of compression that can be influenced by the opening time of the exhaust valve. Due to the higher temperature secondary air, a temperature-increasing exhaust gas afterburning, which is required for catalysts located remotely from the engine, is achieved in particular.
Eine gesteigerte Abgas-Nachverbrennung in der Abgasanlage wird weiter dadurch erreicht, dass der vom unbefeuerten Zylinder angesaugten Luftmenge eine vorbestimmte Kraftstoffmenge zugesetzt wird. Dies ermöglicht u.U. eine Anfettung der befeuerten Zylinder beim Kaltstart zu reduzieren.Increased exhaust gas afterburning in the exhaust system is further achieved by that of the unfired Cylinder intake air amount a predetermined amount of fuel is added. this makes possible u.U. to reduce enrichment of the fired cylinders on cold start.
Die Erfindung ist im folgenden beschrieben.The invention is described below.
Wenn eine Brennkraftmaschine nicht durch ihre thermodynamischen Eigenschaften die erforderliche Abgasqualität in der Kaltstart- und Warmlaufphase trotz erhöhter Kraftstoffzufuhr erreicht, ist es üblich, zur Einhaltung von Emissionsvorschriften dem Abgas Sekundärluft beizumischen. Anstelle der hierfür mit erheblichen Aufwand durchgeführten, bekannten Verfahren wird erfindungsgemäß ein durch Nutzung vorhandener Einrichtungen durchzuführendes Verfahren angegeben.If an internal combustion engine does not due to their thermodynamic properties, the required exhaust gas quality in the Cold start and warm-up phase reached despite increased fuel supply, it is usual, Add secondary air to the exhaust gas to comply with emission regulations. Instead of this carried out with considerable effort, Known methods according to the invention is an existing one Facilities to be implemented Procedure specified.
Das erfindungsgemäße Verfahren kennzeichnet sich dadurch, dass bei einer mehrzylindrigen Brennkraftmaschine mit nockenwellenlosem Ventiltrieb mit mittels einer elektronischen Steuerung variabel steuerbaren Gaswechsel-Ventilen sowie einer funktionell gekoppelten Zylinderabschalteinrichtung aus einem unbefeuerten Zylinder mit mindestens je einem vorbestimmt gesteuert betätigten Ein- und Auslass-Ventil eine jeweilig angesaugte und komprimierte Luftmenge im wesentlichen der Abgasanlage als Sekundärluft zugeführt wird.The method according to the invention is characterized in that in a multi-cylinder internal combustion engine with camshaft-less valve train with variably controllable by means of an electronic control Gas exchange valves and a functionally coupled cylinder deactivation device from an unfired cylinder with at least one predetermined each controlled operated Inlet and outlet valve a respective amount of air sucked in and compressed the exhaust system as secondary air supplied becomes.
Vorzugsweise werden die Gaswechselventile bzw. die Ein- und Auslass- Ventile von befeuerten und unbefeuerten Zylindern jeweils kennfeldgesteuert mittels elektromagnetischer Aktoren betätigt.The gas exchange valves are preferred or the inlet and outlet valves of fired and unfired Cylinder controlled by map using electromagnetic Actuators actuated.
Zur Erzielung einer intensiveren exothermen Reaktion von Abgas und Sekundärluft wird die Luftmenge im unbefeuerten Zylinder durch relativ frühes Öffnen des Aus lassventils höher komprimiert und damit als höher temperierte Sekundärluft der Abgasanlage zugeführt.To achieve a more intense Exothermic reaction of exhaust gas and secondary air is the amount of air in the Unfired cylinder compressed by opening the exhaust valve relatively early and thus as higher tempered secondary air fed to the exhaust system.
Die Abgas-Nachverbrennung lässt sich weiter dadurch steigern, dass der vom unbefeuerten Zylinder angesaugten Luftmenge eine vorbestimmte Kraftstoffmenge zugesetzt wird, so dass dieses Luft-Kraftstoff-Gemisch mit dem heißen Abgas eine gesteigerte Nachverbrennung ergibt für eine kürzere Aufheizzeit eines Katalysators, wodurch die Konversion früher einsetzen kann.The exhaust gas afterburning can further increase that that sucked in by the unfired cylinder Air amount is added a predetermined amount of fuel, so that this air-fuel mixture with the hot exhaust gas increased Afterburning results in a shorter heating-up time a catalyst, which means that the conversion can start earlier.
Für den Fall, dass bei einem Kaltstart der Brennkraftmaschine aus funktionellen oder äußeren Umständen die Zyliderabschalteinrichtung nicht aktivierbar ist, kann eine vorgesehene herkömmliche Sekundärluft-Pumpe mit baulich einfachstem Einblassystem aktiviert werden.For the case that when the internal combustion engine is cold started from functional or external circumstances the Cylider switch-off device can not be activated, can be provided conventional Secondary air pump can be activated with the simplest constructional blowing system.
Bei dem erfindungsgemäßen Verfahren dient demnach ein abschaltbarer Zylinder einer Brennkraftmaschine mit frei steuerbaren Gaswechselventilen eines nockenwellenlosen Ventiltriebes als Luftpumpe zur Förderung von Sekundärluft in die Abgasanlage.In the method according to the invention accordingly, a cylinder of an internal combustion engine that can be deactivated is used with freely controllable gas exchange valves of a camshaft-less Valve train as an air pump for conveying secondary air in the exhaust system.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10242767A DE10242767A1 (en) | 2002-09-14 | 2002-09-14 | Supply of secondary air to automotive exhaust gas system during warm-up phase involves using system in which engine cylinders has non cam-driven inlet and outlet valve system which is regulated by electronic control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10242767A DE10242767A1 (en) | 2002-09-14 | 2002-09-14 | Supply of secondary air to automotive exhaust gas system during warm-up phase involves using system in which engine cylinders has non cam-driven inlet and outlet valve system which is regulated by electronic control unit |
Publications (1)
Publication Number | Publication Date |
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DE10242767A1 true DE10242767A1 (en) | 2004-03-18 |
Family
ID=31724776
Family Applications (1)
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DE10242767A Withdrawn DE10242767A1 (en) | 2002-09-14 | 2002-09-14 | Supply of secondary air to automotive exhaust gas system during warm-up phase involves using system in which engine cylinders has non cam-driven inlet and outlet valve system which is regulated by electronic control unit |
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DE (1) | DE10242767A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202013010403U1 (en) * | 2013-11-18 | 2015-02-19 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Control of a motor vehicle internal combustion engine |
FR3051227A1 (en) * | 2016-05-13 | 2017-11-17 | Renault Sas | METHOD FOR CONTROLLING A CONTROL IGNITION ENGINE |
DE102018114348A1 (en) * | 2018-06-15 | 2019-12-19 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine with at least one secondary air device and method |
DE102021115406B3 (en) | 2021-06-15 | 2022-08-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine comprising a secondary air device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2163537A1 (en) * | 1971-12-21 | 1973-07-12 | Volkswagenwerk Ag | PROCEDURE FOR HEATING EXHAUST GAS PURIFICATION SYSTEMS |
DE4445779A1 (en) * | 1994-12-21 | 1996-06-27 | Fev Motorentech Gmbh & Co Kg | Method for controlling a multi-cylinder internal combustion engine in the cold start and warm-up phase |
DE19951315A1 (en) * | 1999-10-25 | 2001-04-26 | Fev Motorentech Gmbh | Method for operating a piston internal combustion engine in the event of a temporary failure of an electromagnetic valve train |
-
2002
- 2002-09-14 DE DE10242767A patent/DE10242767A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2163537A1 (en) * | 1971-12-21 | 1973-07-12 | Volkswagenwerk Ag | PROCEDURE FOR HEATING EXHAUST GAS PURIFICATION SYSTEMS |
DE4445779A1 (en) * | 1994-12-21 | 1996-06-27 | Fev Motorentech Gmbh & Co Kg | Method for controlling a multi-cylinder internal combustion engine in the cold start and warm-up phase |
DE19951315A1 (en) * | 1999-10-25 | 2001-04-26 | Fev Motorentech Gmbh | Method for operating a piston internal combustion engine in the event of a temporary failure of an electromagnetic valve train |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202013010403U1 (en) * | 2013-11-18 | 2015-02-19 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Control of a motor vehicle internal combustion engine |
FR3051227A1 (en) * | 2016-05-13 | 2017-11-17 | Renault Sas | METHOD FOR CONTROLLING A CONTROL IGNITION ENGINE |
DE102018114348A1 (en) * | 2018-06-15 | 2019-12-19 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine with at least one secondary air device and method |
DE102018114348B4 (en) * | 2018-06-15 | 2021-01-28 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine with at least one secondary air device and method |
DE102021115406B3 (en) | 2021-06-15 | 2022-08-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine comprising a secondary air device |
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