DE10354428A1 - Management system for IC engine especially during cold starting has the opening time of the inlet valve reduced and with retarded timing - Google Patents
Management system for IC engine especially during cold starting has the opening time of the inlet valve reduced and with retarded timing Download PDFInfo
- Publication number
- DE10354428A1 DE10354428A1 DE10354428A DE10354428A DE10354428A1 DE 10354428 A1 DE10354428 A1 DE 10354428A1 DE 10354428 A DE10354428 A DE 10354428A DE 10354428 A DE10354428 A DE 10354428A DE 10354428 A1 DE10354428 A1 DE 10354428A1
- Authority
- DE
- Germany
- Prior art keywords
- gas exchange
- inlet valve
- internal combustion
- valve
- combustion engine
- 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.)
- Ceased
Links
Classifications
-
- 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
- F02D13/0223—Variable control of the intake valves only
- F02D13/0226—Variable control of the intake valves only changing valve lift or valve lift and timing
-
- 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
- F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
-
- 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
- F02D2013/0292—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation in the start-up phase, e.g. for warming-up cold engine or catalyst
-
- 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)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Verfahren zum Betrieb einer gemischverdichtenden, selbstzündenden Brennkraftmaschine mit den, in dem Oberbegriff des Patentanspruchs 1 genannten Merkmalen.method for operating a mixture-compressing, self-igniting internal combustion engine with the, in the preamble of claim 1 mentioned features.
Zum technischen Umfeld von Einrichtungen zur Veränderung der relativen Phasenlage zwischen der Kurbelwelle und einem Gaswechsel-Einlassventil, wird beispielsweise auf die deutsche Patentschrift Nr.: 703 586 hingewiesen. In dieser ist eine gattungsgemäße hydraulische Stelleinrichtung beschrieben, mit der es möglich ist, durch die Phasenverschiebung den Ladungswechsel derart zu beeinflussen, dass die Brennkraftmaschine stets optimal betrieben werden kann. Im vorliegenden Fall handelt es sich beispielsweise um die Anpassung des Ladungswechsels an eine variierende Flughöhe eines Flugzeuges. Mit derartigen Nockenwellenverstellsystemen können heute ferner Abgasemissionswerte für gemischverdichtende, fremdgezündete Brennkraftmaschinen erzielt werden, die auch strengen gesetzliche Anforderungen genügen. Dies ist möglich, da gemischverdichtende, fremdgezündete Brennkraftmaschinen, insbesondere Otto-Brennkraftmaschinen, sog. quantitätsgesteuerte Brennkraftmaschinen sind. Dies bedeutet, dass dem Brennraum der Brennkraftmaschine stets ein stöchiometrisches Kraftstoff-Luft-Verhältnis zugeführt wird (äußere Gemischbildung) und somit Leistung und Drehzahl über die dem Brennraum zugeführte Kraftstoff-Luft-Gemischmenge verändert wird. Die Phasenverschiebung der Nockenwelle dient der Beeinflussung der Ladungsbewegung, bzw. zur Steuerung einer internen Abgasrückführung, wodurch eine emissionsarme Verbrennung erzielt wird.To the technical environment of equipment for changing the relative phase angle between the crankshaft and a gas exchange inlet valve For example, the German Patent No .: 703 586 pointed. In this is a generic hydraulic Control device described with which it is possible by the phase shift the To change charge change such that the internal combustion engine always be optimally operated. In the present case acts For example, it is the adaptation of the charge exchange to a varying altitude of an airplane. With such Nockenwellenverstellsystemen today furthermore exhaust emission values for mixture-compacting, spark-ignited Internal combustion engines are achieved, which are also strict legal Requirements met. This is possible, there mixture-compacting, externally ignited Internal combustion engines, in particular Otto internal combustion engines, so-called. quantity-controlled Internal combustion engines are. This means that the combustion chamber of the Internal combustion engine always a stoichiometric Air-fuel ratio supplied becomes (outer mixture formation) and thus power and speed over which fed to the combustion chamber Fuel-air mixture quantity is changed. The phase shift of the camshaft serves to influence the Charge movement, or to control an internal exhaust gas recirculation, whereby a low-emission combustion is achieved.
Eine
weitere Möglichkeit,
den Kraftstoffverbrauch und die Schadstoffemission von gemischverdichtenden,
fremdgezündeten
Brennkraftmaschinen zu verbessern ist in der deutschen Offenlegungsschrift
Bei einer gemischverdichtenden, selbstzündenden Brennkraftmaschine, ist somit der Einsatz einer Einrichtung zur Veränderung der relativen Phasenlage zwischen Kurbelwelle und Gaswechsel-Einlassventil, oder eines hubvariablen Ventiltriebs nach bisheriger allgemeiner Ansicht nicht sinnvoll, da sie wie oben beschrieben ungedrosselt betrieben wird. Die genannten Einrichtungen würden diesen optimalen Betrieb durch Verschlechterung des Ladungswechsels, d. h. durch Reduzierung des maximalen Füllgrades und somit einer Verringerung der Leistung negativ beeinflussen.at a mixture-compression, self-igniting internal combustion engine, is thus the use of a device for changing the relative phase position between crankshaft and gas exchange intake valve, or a variable stroke Valve drive according to the previous general opinion does not make sense because it is operated as described above unthrottled. The mentioned Facilities would this optimal operation due to deterioration of the charge cycle, d. H. by reducing the maximum filling level and thus a reduction negatively impact performance.
Allerdings erzeugen gemischverdichtende, selbstzündende Brennkraftmaschinen nach einem Kaltstart das sog. „Dieselnageln". Dies kommt u.a. daher, dass in der Anfangsphase nach einem Kaltstart lange Zündverzüge, d.h. infolge instabiler Verbrennung unterschiedliche Zylinderdruckverläufe auftreten. Zudem emittiert die Brennkraftmaschine aufgrund dieser verschleppten Verbrennung während der Warmlaufphase eine überproportionale große Schadstoffmenge, insbesondere HC und CO Emissionen.Indeed produce mixture-compressing, self-igniting internal combustion engines after a cold start, the so-called "diesel nail". in the initial phase after a cold start, long ignition delays, i. as a result of unstable combustion different cylinder pressure curves occur. In addition, the internal combustion engine emits due to this delayed Burning during the warm-up phase a disproportionate size Amount of pollutants, in particular HC and CO emissions.
Aufgabe der vorliegenden Erfindung ist es, den Brennverlauf einer gattungsgemäßen Brennkraftmaschine bei nicht betriebswarmen Motor – insbesondere beim und nach einem Kaltstart – und in weiterer Folge die HC und CO Emissionen zu reduzieren.task The present invention is the burning process of a generic internal combustion engine at not operating warm engine - in particular during and after a cold start - and subsequently to reduce the HC and CO emissions.
Diese Aufgabe wird durch die Merkmale im kennzeichnenden Teil des Patentanspruchs 1 gelöst.These The object is achieved by the features in the characterizing part of the claim 1 solved.
Durch das Verkürzen der Öffnungsdauer des Gaswechsel-Einlassventils und das Verschieben der Phasenlage zwischen Nockenwelle und Kurbelwelle derart, dass das Gaswechsel-Einlassventil später öffnet, saugt die Brennkraftmaschine bei nicht betriebswarmen Motor – insbesondere bei und nach einem Kaltstart – weniger Luft an. Somit ist es möglich, die Zündbedingungen im Brennraum zu verbessern und den Zündverzug zu reduzieren. In weiterer Folge werden auch die HC und CO Emissionen deutlich gesenkt und die Dauer bis zum Erreichen der Katalysatoranspringtemperatur verkürzt. Aufgrund der Verkürzung der verstrichenen Zeit nach einem Kaltstart bis zum Anspringen des Katalysators, entfaltet dieser wiederum früher seine katalytische Wirkung und die Abgase werden ebenfalls in vorteilhafter Weise früher von Schadstoffen gereinigt. Sowohl alternativ zu dem genannten Verfahren, als auch als zusätzliche Maßnahme kann der Ventilhub reduziert werden. Hierdurch werden die gleichen positiven Effekte erzielt, bzw. die positiven Effekte zusätzlich verstärkt.By shortening the opening period of the gas exchange intake valve and shifting the phase position between the camshaft and crankshaft so that the gas exchange intake valve opens later, the internal combustion engine sucks in non-warm engine - especially during and after a cold start - less air. Thus, it is possible to improve the ignition conditions in the combustion chamber and to reduce the ignition delay. Subsequently, the HC and CO emissions are significantly reduced and the duration shortened until reaching the Katalysatoranspringtemperatur. Due to the shortening of the elapsed time after a cold start until to start the catalyst, this unfolds in turn earlier its catalytic effect and the exhaust gases are also cleaned in an advantageous manner earlier of pollutants. Both as an alternative to the mentioned method, as well as an additional measure, the valve lift can be reduced. As a result, the same positive effects are achieved, or the positive effects additionally reinforced.
Sobald die Brennkraftmaschine nach einem Kaltstart unter Anwendung des erfindungsgemäßen Betriebsverfahrens ihre definierte Betriebstemperatur erreicht hat, wird die Öffnungsdauer des Gaswechsel-Einlassventils gem. Patentanspruch 2 wieder verlängert und die relative Phasenlage zwischen Nockenwelle und Kurbelwelle wieder derart verschoben, dass das Gaswechsel-Einlassventil früher öffnet und somit wieder der beste Füllgrad für den Brennraum eingestellt ist. Wurde der Ventilhub entweder als zusätzliche Maßnahme oder ausschließlich zum Erreichen der vorteilhaften Effekte reduziert, wird auch dieser wieder auf größtmöglichen Ventilhub eingestellt, um wie bereits erwähnt, den besten Füllgrad für den Brennraum und somit die maximale Leistung zu erhalten.As soon as the internal combustion engine after a cold start using the operating method according to the invention has reached its defined operating temperature, the opening duration the gas exchange inlet valve acc. Claim 2 extended again and the relative phase position between the camshaft and crankshaft again shifted so that the gas exchange inlet valve opens earlier and thus again the best degree of filling for the Combustion chamber is set. Was the valve lift either as an additional measure or exclusively Reduces to achieve the beneficial effects, this is also back to the highest possible Valve stroke adjusted, as already mentioned, the best degree of filling for the combustion chamber and thus get the maximum performance.
Im Folgenden ist die positive Auswirkung des erfindungsgemäßen Verfahrens auf die Druckverläufe in einem Brennraum einer gemischverdichtenden, selbstzündenden Brennkraftmaschine nach einem Kaltstart in zwei Figuren mit je einem Diagramm näher erläutert.in the The following is the positive effect of the method according to the invention on the pressure gradients in a combustion chamber of a mixture-compressing, self-igniting Internal combustion engine after a cold start in two figures with one each Diagram closer explained.
Das
Diagramm in
In
Die Einrichtung zur Veränderung der relativen Phasenlage zwischen der Kurbelwelle und dem Gaswechsel-Einlassventil kann beispielweise hydraulisch erfolgen, jedoch sind auch andere Wirkprinzipien, wie elektrische oder mechanische Stellantriebe denkbar. Die Verkürzung der Öffnungsdauer des Gaswechsel-Einlassventils kann beispielweise durch eine Verringerung der Hubhöhe des Gaswechsel-Einlassventils erfolgen und/oder mit schaltbaren Ventiltassen oder Schaltnocken. Eine weitere Möglichkeit besteht auch in dem Einsatz von vollvariablen (hub- und zeitvariablen) Ventiltrieben, wie z.B. elektromechanischen Ventiltrieben. Ferner kann die Verkürzung der Öffnungsdauer des Gaswechsel-Einlassventils gleichzeitig oder zeitlich getrennt von der Veränderung der relativen Phasenlage zwischen der Kurbelwelle und dem Gaswechsel-Einlassventil durchgeführt werden.The Institution for change the relative phase angle between the crankshaft and the gas exchange inlet valve can be done hydraulically, for example, but there are others Operating principles, such as electrical or mechanical actuators conceivable. The shortening the opening duration the gas exchange inlet valve For example, by reducing the lift height of the gas exchange inlet valve carried out and / or with switchable valve cups or cam. One more way also exists in the use of full variables (stroke and time variables) Valve drives, such as electromechanical valve trains. Further can the shortening the opening duration the gas exchange inlet valve simultaneously or temporally separated from the change in the relative phase position be performed between the crankshaft and the gas exchange inlet valve.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10354428A DE10354428A1 (en) | 2003-11-21 | 2003-11-21 | Management system for IC engine especially during cold starting has the opening time of the inlet valve reduced and with retarded timing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10354428A DE10354428A1 (en) | 2003-11-21 | 2003-11-21 | Management system for IC engine especially during cold starting has the opening time of the inlet valve reduced and with retarded timing |
Publications (1)
Publication Number | Publication Date |
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DE10354428A1 true DE10354428A1 (en) | 2005-06-23 |
Family
ID=34609194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE10354428A Ceased DE10354428A1 (en) | 2003-11-21 | 2003-11-21 | Management system for IC engine especially during cold starting has the opening time of the inlet valve reduced and with retarded timing |
Country Status (1)
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DE (1) | DE10354428A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004047984A1 (en) * | 2004-10-01 | 2006-05-18 | Volkswagen Ag | Internal combustion engine e.g. direct injection spark ignition engine, operating method for motor vehicle, involves adjusting valve opening overlap of engine valves during gas exchange cycle based on oxygen content in exhaust gas |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE703586C (en) * | 1938-10-14 | 1941-03-12 | Bmw Flugmotorenbau Ges M B H | Hydraulic cam adjustment device for power machines with cylinders arranged in a star shape |
EP0352861A2 (en) * | 1988-07-29 | 1990-01-31 | Magnavox Government and Industrial Electronics Company | Vehicle management computer |
EP0376714A2 (en) * | 1988-12-28 | 1990-07-04 | Isuzu Motors Limited | Control system for internal combustion engine |
DE3940752A1 (en) * | 1989-12-09 | 1991-06-13 | Bosch Gmbh Robert | METHOD FOR CONTROLLING AN OTTO ENGINE WITHOUT THROTTLE VALVE |
US5123397A (en) * | 1988-07-29 | 1992-06-23 | North American Philips Corporation | Vehicle management computer |
DE4223172C1 (en) * | 1992-07-15 | 1993-08-19 | Bayerische Motoren Werke Ag, 8000 Muenchen, De | Cylinder head for IC engine - bearing cover for cam shaft bearing also acts for bearing for eccentric shaft |
DE19509604A1 (en) * | 1995-03-16 | 1996-09-19 | Bayerische Motoren Werke Ag | Valve train of an internal combustion engine |
WO1998003778A1 (en) * | 1996-07-20 | 1998-01-29 | Dieter Reitz | Valve drive system and cylinder head for an internal combustion engine |
DE19708484A1 (en) * | 1997-03-03 | 1998-09-10 | Bayerische Motoren Werke Ag | Device for changing valve motion of lifting valve, especially for gas shuttle valve |
EP1096115A1 (en) * | 1999-10-29 | 2001-05-02 | STS System Technology Services GmbH | Mechanically controlled intake valve lift in an internal combustion engine |
EP0741235B1 (en) * | 1995-05-04 | 2001-07-11 | Ford Motor Company Limited | Dual output camshaft phase controller |
DE10161551A1 (en) * | 2000-12-18 | 2002-06-27 | Avl List Gmbh | Method for operating an internal combustion engine |
WO2002079622A1 (en) * | 2001-03-29 | 2002-10-10 | Robert Bosch Gmbh | Method of operating a self-ignited internal combustion engine |
DE10123186A1 (en) * | 2001-05-12 | 2002-11-14 | Bayerische Motoren Werke Ag | Valve gear device for variable lift adjustment is for gas exchange valve of internal combustion engine and has valve vai intermediary of transmission component effectively connected to roller movable around rotary axis |
DE19914767C2 (en) * | 1998-03-31 | 2003-10-16 | Aisin Seiki | Valve timing control device |
-
2003
- 2003-11-21 DE DE10354428A patent/DE10354428A1/en not_active Ceased
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE703586C (en) * | 1938-10-14 | 1941-03-12 | Bmw Flugmotorenbau Ges M B H | Hydraulic cam adjustment device for power machines with cylinders arranged in a star shape |
DE68904834T2 (en) * | 1988-07-29 | 1994-01-27 | Magnavox Electronic Systems | Motor vehicle guidance regulator. |
EP0352861A2 (en) * | 1988-07-29 | 1990-01-31 | Magnavox Government and Industrial Electronics Company | Vehicle management computer |
US5284116A (en) * | 1988-07-29 | 1994-02-08 | North American Philips Corporation | Vehicle management computer |
US5123397A (en) * | 1988-07-29 | 1992-06-23 | North American Philips Corporation | Vehicle management computer |
EP0376714A2 (en) * | 1988-12-28 | 1990-07-04 | Isuzu Motors Limited | Control system for internal combustion engine |
EP0433632A1 (en) * | 1989-12-09 | 1991-06-26 | Robert Bosch Gmbh | Method to control an internal combustion engine without throttle |
DE3940752A1 (en) * | 1989-12-09 | 1991-06-13 | Bosch Gmbh Robert | METHOD FOR CONTROLLING AN OTTO ENGINE WITHOUT THROTTLE VALVE |
DE4223172C1 (en) * | 1992-07-15 | 1993-08-19 | Bayerische Motoren Werke Ag, 8000 Muenchen, De | Cylinder head for IC engine - bearing cover for cam shaft bearing also acts for bearing for eccentric shaft |
DE19509604A1 (en) * | 1995-03-16 | 1996-09-19 | Bayerische Motoren Werke Ag | Valve train of an internal combustion engine |
EP0741235B1 (en) * | 1995-05-04 | 2001-07-11 | Ford Motor Company Limited | Dual output camshaft phase controller |
WO1998003778A1 (en) * | 1996-07-20 | 1998-01-29 | Dieter Reitz | Valve drive system and cylinder head for an internal combustion engine |
DE19708484A1 (en) * | 1997-03-03 | 1998-09-10 | Bayerische Motoren Werke Ag | Device for changing valve motion of lifting valve, especially for gas shuttle valve |
DE19914767C2 (en) * | 1998-03-31 | 2003-10-16 | Aisin Seiki | Valve timing control device |
EP1096115A1 (en) * | 1999-10-29 | 2001-05-02 | STS System Technology Services GmbH | Mechanically controlled intake valve lift in an internal combustion engine |
DE10161551A1 (en) * | 2000-12-18 | 2002-06-27 | Avl List Gmbh | Method for operating an internal combustion engine |
WO2002079622A1 (en) * | 2001-03-29 | 2002-10-10 | Robert Bosch Gmbh | Method of operating a self-ignited internal combustion engine |
DE10123186A1 (en) * | 2001-05-12 | 2002-11-14 | Bayerische Motoren Werke Ag | Valve gear device for variable lift adjustment is for gas exchange valve of internal combustion engine and has valve vai intermediary of transmission component effectively connected to roller movable around rotary axis |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004047984A1 (en) * | 2004-10-01 | 2006-05-18 | Volkswagen Ag | Internal combustion engine e.g. direct injection spark ignition engine, operating method for motor vehicle, involves adjusting valve opening overlap of engine valves during gas exchange cycle based on oxygen content in exhaust gas |
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