AT504178B1 - METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - Google Patents
METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE Download PDFInfo
- Publication number
- AT504178B1 AT504178B1 AT0162707A AT16272007A AT504178B1 AT 504178 B1 AT504178 B1 AT 504178B1 AT 0162707 A AT0162707 A AT 0162707A AT 16272007 A AT16272007 A AT 16272007A AT 504178 B1 AT504178 B1 AT 504178B1
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- Austria
- Prior art keywords
- exhaust gas
- gas recirculation
- torque
- increased
- gas flow
- Prior art date
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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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- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
2 AT 504 178 B12 AT 504 178 B1
Die Erfindung betrifft ein Verfahren zum Betreiben einer Brennkraftmaschine mit zumindest einer Abgasrückführleitung, in welcher ein Abgasrückführventil angeordnet ist, wobei das Abgasrückführventil in Abhängigkeit des Betriebszustandes der Brennkraftmaschine betätigt wird, wobei bei einer erhöhten Drehmomentanforderung eine Transientenfunktion aktiviert wird, welche den Abgasdurchfluss in der Abgasrückführleitung zumindest verringert, vorzugsweise unterbricht, und die erst nach Erreichen eines definierten Drehmomentzuwachses den Abgasdurchfluss wieder erhöht.The invention relates to a method for operating an internal combustion engine with at least one exhaust gas recirculation line, in which an exhaust gas recirculation valve is arranged, wherein the exhaust gas recirculation valve is actuated depending on the operating state of the internal combustion engine, wherein at an increased torque request, a transient function is activated, which the exhaust gas flow in the exhaust gas recirculation line at least decreases, preferably interrupts, and increases the exhaust gas flow again only after reaching a defined torque increase.
Die EP 1 726 810 A1 offenbart eine Regelungseinrichtung für eine Brennkraftmaschine mit einem Abgasrückführsystem, in welchem ein Abgasrückführventil angeordnet ist. Bei einem erhöhten Drehmomentbedarf wird eine Transientenfunktion aktiviert, welche den Abgasdurchfluss verringert und erst nach Erreichen eines definierten Drehmomentzuwachses den Abgasdurchfluss wieder erhöht.EP 1 726 810 A1 discloses a control device for an internal combustion engine with an exhaust gas recirculation system, in which an exhaust gas recirculation valve is arranged. With an increased torque requirement, a transient function is activated, which reduces the exhaust gas flow and only after reaching a defined torque increase, the exhaust gas flow increases again.
Aus der JP 2007-177640 A ist eine Regelungseinrichtung für eine Brennkraftmaschine bekannt, welche den Abgasdurchfluss in Abhängigkeit des Motorbetriebszustandes optimal einstellt.From JP 2007-177640 A, a control device for an internal combustion engine is known which optimally adjusts the exhaust gas flow rate as a function of the engine operating state.
Die JP 2004-092477 A offenbart eine Brennkraftmaschine mit einer Abgasrückführleitung zwischen einem Einlass- und einem Auslasssystem, wobei in der Abgasrückführleitung ein Abgasrückführventil angeordnet ist. Während eines Verzögerungsvorganges wird verhindert, dass das Abgasrückführventil geöffnet wird. Dadurch kann die Abgasrückführrate bei einem erneuten Beschleunigungsvorgang klein gehalten werden, was die Rauchemissionen verringert.JP 2004-092477 A discloses an internal combustion engine having an exhaust gas recirculation line between an intake and an exhaust system, wherein an exhaust gas recirculation valve is arranged in the exhaust gas recirculation line. During a deceleration process, the exhaust gas recirculation valve is prevented from being opened. Thereby, the exhaust gas recirculation rate can be kept small in a renewed acceleration process, which reduces the smoke emissions.
Weiters ist es bekannt, die Abgasrückführmengen in Abhängigkeit des Saugrohrdruckes, bzw. Ladedruckes zu regeln, beispielsweise aus der US 4,022,237 A, der EP 0 930 423 A2, der DE 10 2005 004 832 A1 oder der DE 32 25 867 A1.Furthermore, it is known to regulate the exhaust gas recirculation quantities as a function of intake manifold pressure or charge pressure, for example from US Pat. No. 4,022,237 A, EP 0 930 423 A2, DE 10 2005 004 832 A1 or DE 32 25 867 A1.
Aufgabe der Erfindung ist es, bei einer Brennkraftmaschine mit externer Abgasrückführung einen raschen Drehmomentaufbau zu ermöglichen.The object of the invention is to allow for an internal combustion engine with external exhaust gas recirculation rapid torque build-up.
Erfindungsgemäß wird dies dadurch erreicht, dass der Abgasdurchfluss ab einem definierten Drehmomentzuvyachs, vorzugsweise bei Erreichen des angeforderten erhöhten Drehmomentes, mit einer definierten Zuwachsgeschwindigkeit erhöht wird.According to the invention this is achieved in that the exhaust gas flow is increased from a defined Drehmomentzuvyachs, preferably upon reaching the requested increased torque at a defined rate of increase.
Ein besonders rascher Drehmomentenaufbau kann erreicht werden, wenn der Abgasdurchfluss ab einem definierten Drehmomentzuwachs bis auf einen optimalen Abgasdurchfluss erhöht wird.A particularly rapid torque build-up can be achieved if the exhaust gas flow is increased from a defined torque increase up to an optimal exhaust gas flow.
Wird ein höheres Drehmoment angefordert, schließt sich das Abgasrückführorgan. Sobald das gewünschte Drehmoment erreicht ist, wird das Abgasrückführventil mit einer definierten Geschwindigkeit geöffnet, wobei gleichzeitig der Ladedruck entsprechend erhöht wird, so dass sich das effektive Motordrehmoment nicht verändert. Auf diese Weise können nicht akzeptable Drehmomentschwankungen verhindert werden. Das Abgasrückführventil wird nur so lange geöffnet, bis die optimale Abgasrückführrate eingestellt ist. Dadurch ist eine deutliche Verbesserung des Drehmomentaufbaues erkennbar.If a higher torque is requested, the exhaust gas recirculation device closes. Once the desired torque is reached, the exhaust gas recirculation valve is opened at a defined speed, at the same time the boost pressure is increased accordingly, so that the effective engine torque does not change. In this way, unacceptable torque fluctuations can be prevented. The exhaust gas recirculation valve is opened only until the optimum exhaust gas recirculation rate has been set. As a result, a significant improvement in the torque build-up can be seen.
Die Erfindung wird im Folgenden anhand der Figur näher erläutert.The invention will be explained in more detail below with reference to FIG.
Die Figur zeigt ein Diagramm, in welchem das Drehmoment M, die Stellung des Abgasrückführventils EGR, sowie der Ladedruck p über der Zeit t aufgetragen ist.The figure shows a diagram in which the torque M, the position of the exhaust gas recirculation valve EGR, and the boost pressure p over the time t is plotted.
Strichlierte Linien zeigen den Stand der Technik ohne aktivierte Transientenfunktion an. Voll durchgezogene Linien geben das erfindungsgemäße Verfahren mit aktivierter Transientenfunktion wieder. Der Drehmomentverlauf ist mit Mi, der Ladedruck mit Ρί und die Stellung des Abgasrückführventils beim erfindungsgemäßen Verfahren mit EGRi bezeichnet. Die entsprechen-Dashed lines indicate the state of the art without activated transient function. Solid lines represent the inventive method with activated transient function again. The torque curve is denoted by Mi, the boost pressure with Ρί and the position of the exhaust gas recirculation valve in the process according to the invention with EGRi. The corresponding
Claims (5)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0162707A AT504178B1 (en) | 2007-10-11 | 2007-10-11 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE |
PCT/EP2008/061648 WO2009037120A2 (en) | 2007-09-13 | 2008-09-04 | Internal combustion engine comprising a multi-scroll exhaust gas turbocharger |
DE112008002358T DE112008002358A5 (en) | 2007-09-13 | 2008-09-04 | Method for controlling the cooling capacity of a cooling system of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0162707A AT504178B1 (en) | 2007-10-11 | 2007-10-11 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE |
Publications (3)
Publication Number | Publication Date |
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AT504178A2 AT504178A2 (en) | 2008-03-15 |
AT504178A3 AT504178A3 (en) | 2008-05-15 |
AT504178B1 true AT504178B1 (en) | 2009-01-15 |
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Application Number | Title | Priority Date | Filing Date |
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AT0162707A AT504178B1 (en) | 2007-09-13 | 2007-10-11 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4022237A (en) * | 1974-02-28 | 1977-05-10 | The Bendix Corporation | Exhaust gas recirculation flow control system |
DE3225867A1 (en) * | 1982-07-10 | 1984-01-12 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Internal combustion engine with an exhaust turbocharger |
EP0930423A2 (en) * | 1998-01-16 | 1999-07-21 | DaimlerChrysler AG | Device for controlling the boost pressure and the exhaust gas recirculation of an internal combustion engine, especially of a diesel engine |
JP2004092477A (en) * | 2002-08-30 | 2004-03-25 | Denso Corp | Controlling equipment of internal combustion engine |
DE102005004832A1 (en) * | 2004-02-03 | 2005-09-15 | Denso Corp., Kariya | Control apparatus for diesel engine, has turbo protector which implements protective control to protect turbo supercharger when real supercharging pressure produced by supercharger exceeds maximum accepted supercharging pressure |
EP1726810A1 (en) * | 2005-05-13 | 2006-11-29 | Hitachi, Ltd. | Control apparatus of engine |
JP2007177640A (en) * | 2005-12-27 | 2007-07-12 | Nissan Motor Co Ltd | Engine control device |
-
2007
- 2007-10-11 AT AT0162707A patent/AT504178B1/en active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4022237A (en) * | 1974-02-28 | 1977-05-10 | The Bendix Corporation | Exhaust gas recirculation flow control system |
DE3225867A1 (en) * | 1982-07-10 | 1984-01-12 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Internal combustion engine with an exhaust turbocharger |
EP0930423A2 (en) * | 1998-01-16 | 1999-07-21 | DaimlerChrysler AG | Device for controlling the boost pressure and the exhaust gas recirculation of an internal combustion engine, especially of a diesel engine |
JP2004092477A (en) * | 2002-08-30 | 2004-03-25 | Denso Corp | Controlling equipment of internal combustion engine |
DE102005004832A1 (en) * | 2004-02-03 | 2005-09-15 | Denso Corp., Kariya | Control apparatus for diesel engine, has turbo protector which implements protective control to protect turbo supercharger when real supercharging pressure produced by supercharger exceeds maximum accepted supercharging pressure |
EP1726810A1 (en) * | 2005-05-13 | 2006-11-29 | Hitachi, Ltd. | Control apparatus of engine |
JP2007177640A (en) * | 2005-12-27 | 2007-07-12 | Nissan Motor Co Ltd | Engine control device |
Also Published As
Publication number | Publication date |
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AT504178A3 (en) | 2008-05-15 |
AT504178A2 (en) | 2008-03-15 |
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