EP1481150A1 - Cylinder head for an internal combustion engine - Google Patents

Cylinder head for an internal combustion engine

Info

Publication number
EP1481150A1
EP1481150A1 EP20030742498 EP03742498A EP1481150A1 EP 1481150 A1 EP1481150 A1 EP 1481150A1 EP 20030742498 EP20030742498 EP 20030742498 EP 03742498 A EP03742498 A EP 03742498A EP 1481150 A1 EP1481150 A1 EP 1481150A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
inlet
internal combustion
combustion engine
fuel
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
Application number
EP20030742498
Other languages
German (de)
French (fr)
Inventor
Van-Khanh Tran
Stephan Müller
Rainer Bock
Thorsten Unger
Nils Nagel
Markus Eberl
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1481150A1 publication Critical patent/EP1481150A1/en
Ceased legal-status Critical Current

Links

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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F02B23/104—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on a side position of the cylinder
    • 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
    • F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F02B31/08—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets
    • F02B31/085—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets having two inlet valves
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F02B2023/108—Swirl flow, i.e. the axis of rotation of the main charge flow motion is vertical
    • 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
    • F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F02B2031/006—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air intake valves
    • 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
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/26—Pistons  having combustion chamber in piston head
    • 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 a cylinder head for an internal combustion engine according to the features of the preamble of patent claim 1.
  • Gasoline engines with direct injection are the focus of the development work of many automobile manufacturers. With all currently used gasoline direct injection methods - jet-guided, wall-guided, air-guided - it must be ensured that the fuel-air mixture ignites reliably even at the lowest injection rates. Particularly in the stratified charge mode aimed at at partial load ( ⁇ »1), in which the injection timing, in contrast to homogeneous operation, is shifted from the intake stroke to the compression stroke, the time until the ignition is shortened for good mixture preparation. It is therefore all the more necessary, on the one hand, to achieve an intimate mixing of fuel and combustion air within the charge cloud by means of a corresponding charge movement and, on the other hand, to ensure that this mixture cloud is transported to the ignition site.
  • swirl or tumble flaps are known from the prior art, which are arranged in the inlet duct of a cylinder head and support the preparation of the mixture cloud and the supply of the concentrated mixture to the spark plug. While a swirl flap generates a charge movement in the cylinder around the cylinder vertical axis with a swirl center to the cylinder center axis, a charge movement around the cylinder transverse axis can be achieved through a tumble flap.
  • an internal combustion engine is known from DE 44 45 777 AI, in which a swirl control valve provided with a recess is arranged in the intake duct of the cylinder head to generate a tumble air flow.
  • the object of the invention is to provide a charge movement device in the inlet duct of the vehicle, in particular for a four valve engine with gasoline direct injection To create internal combustion engine that reliably supports mixture preparation in the combustion chamber.
  • the adjustable flap element according to the invention is characterized in that, in its closed state, two open subchannel cross sections remain, via which the combustion air enters the combustion chamber of the internal combustion engine with the formation of a double swirl flow. This ensures intensive mixture preparation, which is particularly necessary for stratified charge operation.
  • the charge movement device is characterized in that the flap element is essentially rectangular in shape, while the inlet duct is designed in the shape of a cross-oval, so that when the flap position is closed, two arcuate partial duct cross sections remain, via which the combustion air flow enters the combustion chamber of the internal combustion engine.
  • a piston recess is provided on the end of the piston facing the combustion chamber, via which the fuel-air mixture reaches the ignition point in a wall-guided manner.
  • FIG. 1 shows a cross section through a cylinder head of an internal combustion engine
  • FIG. 2 shows a flap element in the inlet duct of an internal combustion engine
  • Fig. 3 is a schematic representation of the mixture transport to the ignition site
  • Fig. 4 + 5 is a plan view of a piston with a schematic representation of the
  • Fig. 6 shows the flap element and Fig. 7 shows a map to show the different positions of the flap element.
  • the four-valve cylinder head 2 has two intake valves 4 (only one intake valve can be seen in the sectional view) and two exhaust valves 6 (only one exhaust valve can be seen). Both the inlet and the outlet valves 4, 6 each monitor a channel 10 to 13 leading to a combustion chamber 8, via which the combustion air is supplied to the combustion chamber 8 in a known manner and the exhaust gases produced during combustion are removed.
  • the two inlet ducts, hereinafter referred to as branch pipes 10, 11, are seen upstream from the combustion chamber 14 and brought together to form a common duct 14, in which a flap element 16 fastened to a shaft 17 is arranged, which is described in more detail below.
  • An injection valve 18 is also accommodated in the cylinder head 2, the fuel jet of which is directed directly into the combustion chamber 8 of the internal combustion engine.
  • a cylinder space 20 adjoins the combustion chamber 8, in which a piston 24 provided with a recess 22 can be moved and controlled via a crankshaft (not shown).
  • the fuel mixture supplied to the combustion chamber 8 is in the middle of the Ignition device 26 arranged in the combustion chamber roof, which is shown only schematically in the drawings as the ignition location, ignites.
  • the channel section 14 has a transverse oval shape, while the flap element arranged in the channel section 14, hereinafter referred to as swirl flap 16, is essentially rectangular.
  • a double swirl flow 28 is generated, which produces intensive mixing with the fuel cloud 30 injected into the combustion chamber 8.
  • the mixture cloud is, as shown with reference to FIGS. 3a to 3c, guided at the end of the compression stroke in the piston recess 22 to the ignition location 26 and ignited there.
  • the swirl flap 16 is steplessly adjustable between the "open” position and the "closed” position with the aid of the shaft 17.
  • a map as shown in FIG. 7 is stored in a control unit, by means of which the position of the swirl flap 16 can be controlled as a function of the load and speed of the internal combustion engine.
  • the swirl flap 16 In a lower load range A with a fuel-air ratio ⁇ »1, the swirl flap 16 is completely closed to generate a double swirl flow; maximum swirl is generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

The invention relates to a cylinder head for an internal combustion engine, in which at least one inlet and one outlet channel (10 to 13) are disposed and lead to a combustion chamber (8) next to a cylinder compartment (20). The inlet and outlet channel is monitored by valve elements (4, 6) and a piston (24) is movably disposed in the cylinder compartment. An injection valve (18) injects fuel into the combustion chamber, thereby producing a fuel/air mixture. An ignition device (26) for igniting the fuel/air mixture projects into the combustion chamber, and a charge movement device is disposed in the inlet channel. According to the invention, the charge movement device is configured as an adjustable flap element (16) which, when closed, leaves free two partial channel cross-sections (14a, 14b) of the inlet channel (14) via which combustion air reaches the combustion chamber (8). The inventive configuration of the flap element (16) allows, in a simple manner, the swirl and turbulence formation required for direct fuel injection in a stratified charge mode.

Description

Zylinderkopf für eine Brennkraftmaschine Cylinder head for an internal combustion engine
Die Erfindung betrifft einen Zylinderkopf für eine Brennkraftmaschine gemäß den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to a cylinder head for an internal combustion engine according to the features of the preamble of patent claim 1.
Ottomotoren mit Direkteinspritzung stehen im Mittelpunkt der Entwicklungsarbeiten vieler Automobilhersteller. Bei allen derzeitig verwendeten Verfahren der Benzin - Direkteinspritzung - strahlgeführt, wandgeführt, luftgeführt - muss sicher gestellt werden, dass das Brennstoff - Luftgemisch sich auch bei kleinsten Einspritzraten zuverlässig entzündet. Insbesondere bei dem im Teillast angestrebten Schichtladebetrieb (λ » 1), bei dem der Einspritzzeitpunkt im Gegensatz zum Homogenbetrieb vom Einlasstakt zum Kompressionstakt hin verlagert wird, ist die Zeitspanne bis zur Zündung für eine gute Gemischaufbereitung verkürzt. Um so mehr ist es daher erforderlich, durch eine entsprechende Ladungsbewegung einerseits eine innige Vermischung von Kraftstoff und Verbrennungsluft innerhalb der Ladungswolke zu erzielen und andererseits ein Transport dieser Gemischwolke zum Zündort sicher zu stellen.Gasoline engines with direct injection are the focus of the development work of many automobile manufacturers. With all currently used gasoline direct injection methods - jet-guided, wall-guided, air-guided - it must be ensured that the fuel-air mixture ignites reliably even at the lowest injection rates. Particularly in the stratified charge mode aimed at at partial load (λ »1), in which the injection timing, in contrast to homogeneous operation, is shifted from the intake stroke to the compression stroke, the time until the ignition is shortened for good mixture preparation. It is therefore all the more necessary, on the one hand, to achieve an intimate mixing of fuel and combustion air within the charge cloud by means of a corresponding charge movement and, on the other hand, to ensure that this mixture cloud is transported to the ignition site.
Aus dem Stand der Technik sind sog. Drall- oder Tumble - Klappen bekannt, die im Einlasskanal eines Zylinderkopfes angeordnet sind und die Aufbereitung der Gemischwolke sowie die Zuführung des konzentrierten Gemischs zur Zündkerze unterstützen. Während durch eine Drallklappe eine Ladungsbewegung im Zylinder um die Zylinder - Hochachse mit Drallzentrum zur Zylindermittelachse erzeugt wird, ist durch eine Tumble - Klappe eine Ladungsbewegung um die Zylinder - Querachse erreichbar. So ist beispielsweise aus der DE 44 45 777 AI eine Brennkraftmaschine bekannt, bei der im Ansaugkanal des Zylinderkopfes zur Erzeugung einer Tumble - Luftströmung ein mit einer Aussparung versehenes Wirbelsteuerventil angeordnet ist.So-called swirl or tumble flaps are known from the prior art, which are arranged in the inlet duct of a cylinder head and support the preparation of the mixture cloud and the supply of the concentrated mixture to the spark plug. While a swirl flap generates a charge movement in the cylinder around the cylinder vertical axis with a swirl center to the cylinder center axis, a charge movement around the cylinder transverse axis can be achieved through a tumble flap. For example, an internal combustion engine is known from DE 44 45 777 AI, in which a swirl control valve provided with a recess is arranged in the intake duct of the cylinder head to generate a tumble air flow.
Aufgabe der Erfindung ist es, eine insbesondere für einen Vierventil - Motor mit Benzindirekteinspritzung vorgesehene Ladungsbewegungseinrichtung im Einlasskanal der Brennkraftmaschine zu schaffen, die eine Gemischaufbereitung im Brennraum zuverlässig unterstützt.The object of the invention is to provide a charge movement device in the inlet duct of the vehicle, in particular for a four valve engine with gasoline direct injection To create internal combustion engine that reliably supports mixture preparation in the combustion chamber.
Die Lösung der Aufgabe erfolgt durch die im Anspruch 1 angegebenen Merkmale.The problem is solved by the features specified in claim 1.
Das erfindungsgemäße verstellbare Klappenelement zeichnet sich dadurch aus, dass in ihrem geschlossenen Zustand zwei offene Teilkanalquerschnitte verbleiben, über die die Verbrennungsluft unter Ausbildung einer Doppeldrallströmung in den Brennraum der Brennkraftmaschine gelangt. Damit wird eine insbesondere für den Schichtladebetrieb erforderliche intensive Gemischaufbereitung sicher gestellt.The adjustable flap element according to the invention is characterized in that, in its closed state, two open subchannel cross sections remain, via which the combustion air enters the combustion chamber of the internal combustion engine with the formation of a double swirl flow. This ensures intensive mixture preparation, which is particularly necessary for stratified charge operation.
Durch die in den Unteransprüchen angegebenen Merkmale sind vorteilhafte Weiterbildungen des erfindungsgemäßen Zylinderkopfes möglich.Advantageous developments of the cylinder head according to the invention are possible due to the features specified in the subclaims.
Die Ladungsbewegungseinrichtung zeichnet sich dadurch aus, dass das Klappenelement im wesentlichen rechteckförmig ausgebildet ist, während der Einlasskanal querovalförmig ausgestaltet ist, so dass bei geschlossener Klappenstellung zwei kreisbogenförmige Teilkanalquerschnitte verbleiben, über die der Verbrennungsluftstrom in den Brennraum der Brennkraftmaschine gelangt.The charge movement device is characterized in that the flap element is essentially rectangular in shape, while the inlet duct is designed in the shape of a cross-oval, so that when the flap position is closed, two arcuate partial duct cross sections remain, via which the combustion air flow enters the combustion chamber of the internal combustion engine.
Damit die im Brennraum erzeugte Doppeldrallströmung zusammen mit dem in den Brennraum eingespritzten Kraftstoff sicher zum Zündort gelangt, ist auf der dem Brennraum zugewandten Stirnseite des Kolbens eine Kolbenmulde vorgesehen, über die das Brennstoff - Luftgemisch wandgeführt zum Zündort gelangt.To ensure that the double swirl flow generated in the combustion chamber, together with the fuel injected into the combustion chamber, reaches the ignition point safely, a piston recess is provided on the end of the piston facing the combustion chamber, via which the fuel-air mixture reaches the ignition point in a wall-guided manner.
Ein Ausführungsbeispiels der Erfindung ist in der nachfolgenden Beschreibung und Zeichnung näher erläutert. Es zeigen:An embodiment of the invention is explained in more detail in the following description and drawing. Show it:
Fig. 1 einen Querschnitt durch einen Zylinderkopf einer Brennkraftmaschine, Fig. 2 die Darstellung eines Klappenelementes im Einlasskanal einer Brennkraftmaschine,1 shows a cross section through a cylinder head of an internal combustion engine, FIG. 2 shows a flap element in the inlet duct of an internal combustion engine,
Fig. 3 eine schematische Darstellung des Gemischtransports zum Zündort, Fig. 4+5eine Draufsicht auf einen Kolben mit schematischer Darstellung derFig. 3 is a schematic representation of the mixture transport to the ignition site, Fig. 4 + 5 is a plan view of a piston with a schematic representation of the
Ladungsbewegung, Fig. 6 eine Darstellung des Klappenelementes und Fig. 7 ein Kennfeld zur Darstellung der verschiedenen Stellungen des Klappenelementes.Charge movement, Fig. 6 shows the flap element and Fig. 7 shows a map to show the different positions of the flap element.
Beschreibung des AusführungsbeispielesDescription of the embodiment
Der Vierventil - Zylinderkopf 2 weist zwei Einlassventile 4 (in der Schnittdarstellung ist nur ein Einlassventil erkennbar) sowie zwei Auslassventile 6 (nur ein Auslassventil erkennbar) auf. Sowohl die Ein- als auch die Auslassventile 4, 6 überwachen jeweils einen zu einem Brennraum 8 führenden Kanal 10 bis 13, über die auf bekannte Art und Weise die Verbrennungsluft dem Brennraum 8 zugeführt und die bei der Verbrennung entstehenden Abgase abgeführt werden. Die beiden Einlasskanäle, im folgenden als Zweigrohre 10, 11 bezeichnet, sind stromaufwärts vom Brennraum 14 gesehen, zu einem gemeinsamen Kanal 14 zusammen geführt, in der ein an einer Welle 17 befestigtes Klappenelement 16 angeordnet ist, das im folgenden noch näher beschrieben ist.The four-valve cylinder head 2 has two intake valves 4 (only one intake valve can be seen in the sectional view) and two exhaust valves 6 (only one exhaust valve can be seen). Both the inlet and the outlet valves 4, 6 each monitor a channel 10 to 13 leading to a combustion chamber 8, via which the combustion air is supplied to the combustion chamber 8 in a known manner and the exhaust gases produced during combustion are removed. The two inlet ducts, hereinafter referred to as branch pipes 10, 11, are seen upstream from the combustion chamber 14 and brought together to form a common duct 14, in which a flap element 16 fastened to a shaft 17 is arranged, which is described in more detail below.
Im Zylinderkopf 2 findet weiterhin ein Einspritzventil 18 Aufnahme, dessen Kraftstoffstrahl direkt in den Brennraum 8 der Brennkraftmaschine gerichtet ist. An den Brennraum 8 grenzt ein Zylinderraum 20 an, in dem ein mit einer Mulde 22 versehener Kolben 24 bewegbar und über eine nicht dargestellt Kurbelwelle gesteuert, angeordnet ist. Das dem Brennraum 8 zugeführte Kraftstoffgemisch wird mit Hilfe einer in der Mitte des Brennraumdaches angeordneten Zündeinrichtung 26, die in den Zeichnungen nur schematisch als Zündort dargestellt ist, entflammt.An injection valve 18 is also accommodated in the cylinder head 2, the fuel jet of which is directed directly into the combustion chamber 8 of the internal combustion engine. A cylinder space 20 adjoins the combustion chamber 8, in which a piston 24 provided with a recess 22 can be moved and controlled via a crankshaft (not shown). The fuel mixture supplied to the combustion chamber 8 is in the middle of the Ignition device 26 arranged in the combustion chamber roof, which is shown only schematically in the drawings as the ignition location, ignites.
Wie insbesondere aus Fig. 2 ersichtlich, ist der Kanalabschnitt 14 querovalförmig ausgebildet, während das im Kanalabschnitt 14 angeordnete Klappenelement, im folgenden als Drallklappe 16 bezeichnet, im wesentlichen rechteckförmig ausgebildet ist. Dadurch ergeben sich bei einer geschlossenen Stellung der Drallklappe 16 zwei Teilkanalquerschnitte 14a und 14b, über die auch bei geschlossener Klappenstellung Verbrennungsluft in den Brennraum 8 gelangt. Somit wird bei geschlossener Stellung der Drallklappe 16 eine Doppeldrallströmung 28 erzeugt, die eine intensive Vermischung mit der in den Brennraum 8 eingespritzten Kraftstoffwolke 30 erzeugt. Die Gemischwolke wird, wie anhand der Fig. 3a bis 3c dargestellt, am Ende des Kompressionshubes in der Kolbenmulde 22 zum Zündort 26 geführt und dort entflammt. Die Drallklappe 16 ist mit Hilfe der Welle 17 stufenlos zwischen der Stellung "offen" und der Stellung "geschlossen" einstellbar. Dazu ist beispielsweise ein, wie in Fig. 7 dargestelltes Kennfeld in einem Steuergerät hinterlegt, durch das die Stellung der Drallklappe 16 in Abhängigkeit von Last und Drehzahl der Brennkraftmaschine steuerbar ist. In einem unteren Lastbereich A mit einem Kraftstoff- Luftverhältnis λ » 1 ist zur Erzeugung einer Doppeldrallströmung die Drallklappe 16 vollständig geschlossen; maximaler Drall wird erzeugt. Von einem mittleren Lastbereich B mit einem Kraftstoff- Luftverhältnis λ >1 zu einem oberen Lastbereich C mit einem Kraftstoff-Luftverhältnis λ=l wird die Drallklappe 16 kontinuierlich geöffnet, so dass im Lastbereich C die Drallklappe vollkommen geöffnet ist, da in diesem Betriebszustand (Homogenbetrieb) keine Drallerzeugung mehr erforderlich ist. As can be seen in particular from FIG. 2, the channel section 14 has a transverse oval shape, while the flap element arranged in the channel section 14, hereinafter referred to as swirl flap 16, is essentially rectangular. This results in two sub-channel cross sections 14a and 14b in a closed position of the swirl flap 16, via which combustion air enters the combustion chamber 8 even when the flap position is closed. Thus, with the swirl flap 16 in the closed position, a double swirl flow 28 is generated, which produces intensive mixing with the fuel cloud 30 injected into the combustion chamber 8. The mixture cloud is, as shown with reference to FIGS. 3a to 3c, guided at the end of the compression stroke in the piston recess 22 to the ignition location 26 and ignited there. The swirl flap 16 is steplessly adjustable between the "open" position and the "closed" position with the aid of the shaft 17. For this purpose, for example, a map as shown in FIG. 7 is stored in a control unit, by means of which the position of the swirl flap 16 can be controlled as a function of the load and speed of the internal combustion engine. In a lower load range A with a fuel-air ratio λ »1, the swirl flap 16 is completely closed to generate a double swirl flow; maximum swirl is generated. The swirl flap 16 is opened continuously from a medium load range B with a fuel-air ratio λ> 1 to an upper load range C with a fuel-air ratio λ = 1, so that in the load range C the swirl flap is completely open, since in this operating state (homogeneous operation ) no more swirl generation is required.

Claims

Patentansprüche claims
1. Zylinderkopf für eine Brennkraftmaschine, in dem mindestens ein Einlass- und ein Auslasskanal angeordnet sind, die zu einem an einen Zylinderraum angrenzenden Brennraum führen, wobei Ein - und Auslasskanal durch Ventilelemente überwacht sind, einen im Zylinderraum beweglich angeordneten Kolben, einem Einspritzventil, über das zur Ausbildung eines Brennstoff - Luftgemisches Kraftstoff in den Brennraum einspritzbar ist, und eine in den Brennraum hineinragende Zündeinrichtung zur Entflammung des Brennstoff - Luftgemisches, sowie mit einer im Einlasskanal angeordneten Ladungsbewegungseinrichtung, dadurch gekennzeichnet, dass die Ladungsbewegungseinrichtung als verstellbares Klappenelement (16) ausgebildet ist, das bei geschlossener Stellung zwei Teilkanalquerschnitte (14a, 14b) des Einlasskanals (14) freilässt, über die Verbrennungsluft in den Brennraum (8) gelangt.1. Cylinder head for an internal combustion engine, in which at least one inlet and one outlet duct are arranged, which lead to a combustion chamber adjoining a cylinder chamber, the inlet and outlet duct being monitored by valve elements, a piston, an injection valve, which is movably arranged in the cylinder chamber which can be injected into the combustion chamber to form a fuel / air mixture, and an ignition device which projects into the combustion chamber for igniting the fuel / air mixture, and with a charge movement device arranged in the inlet duct, characterized in that the charge movement device is designed as an adjustable flap element (16) , which leaves two partial duct cross sections (14a, 14b) of the inlet duct (14) free when the position is closed, via which combustion air enters the combustion chamber (8).
2. Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Querschnitt des Kanals (14) querovalförmig und das Klappenelement (16) rechteckförmig ausgebildet sind, so dass bei geschlossener Klappenstellung zwei kreisbogenförmige Teilkanalquerschnitte (14a, 14b) ausgebildet sind.2. Internal combustion engine according to claim 1, characterized in that the cross section of the channel (14) is of transverse oval shape and the flap element (16) is rectangular, so that when the flap position is closed, two arcuate partial channel cross sections (14a, 14b) are formed.
3. Brennkraftmaschine, nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Einlasskanal (14) zwei zum Brennraum (8) führende Zweigrohre (10, 11) aufweist, die jeweils durch einen Einlassventil (4) überwacht sind und dass das Klappenelement (16) stromaufwärts der beiden Zweigrohre (10, 11) angeordnet ist.3. Internal combustion engine according to claim 1 or 2, characterized in that the inlet channel (14) has two branch pipes (10, 11) leading to the combustion chamber (8), each of which is monitored by an inlet valve (4) and that the flap element (16 ) is arranged upstream of the two branch pipes (10, 11).
4. Brennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kolben (24) auf seiner dem Brennraum (8) zugewandten Stirnseite eine Kolbenmulde (22) aufweist. 4. Internal combustion engine according to one of the preceding claims, characterized in that the piston (24) on its end facing the combustion chamber (8) has a piston recess (22).
EP20030742498 2002-02-23 2003-01-23 Cylinder head for an internal combustion engine Ceased EP1481150A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10207914A DE10207914A1 (en) 2002-02-23 2002-02-23 Cylinder head for an internal combustion engine
DE10207914 2002-02-23
PCT/EP2003/000626 WO2003071110A1 (en) 2002-02-23 2003-01-23 Cylinder head for an internal combustion engine

Publications (1)

Publication Number Publication Date
EP1481150A1 true EP1481150A1 (en) 2004-12-01

Family

ID=27674926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030742498 Ceased EP1481150A1 (en) 2002-02-23 2003-01-23 Cylinder head for an internal combustion engine

Country Status (3)

Country Link
EP (1) EP1481150A1 (en)
DE (1) DE10207914A1 (en)
WO (1) WO2003071110A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2853353B1 (en) * 2003-04-04 2006-09-08 Peugeot Citroen Automobiles Sa INTERNAL COMBUSTION ENGINE, GASOLINE AND IGNITION CONTROL
DE102004021363B4 (en) * 2004-04-30 2013-07-25 Audi Ag Method for controlling the in-cylinder flow (intake swirl) on an internal combustion engine and directly injecting internal combustion engine
AT511721B1 (en) * 2011-11-03 2013-02-15 Avl List Gmbh INTAKE TRACK FOR AN INTERNAL COMBUSTION ENGINE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69300991T2 (en) * 1992-02-28 1996-06-13 Mitsubishi Motors Corp Stratified combustion engine
JPH06248959A (en) * 1993-03-02 1994-09-06 Nissan Motor Co Ltd Air intake device of internal combustion engine
JPH07119472A (en) * 1993-10-19 1995-05-09 Fuji Heavy Ind Ltd Intake device for engine
JP3332177B2 (en) 1993-12-22 2002-10-07 日産自動車株式会社 Spark ignition internal combustion engine
WO2002038924A1 (en) * 2000-10-30 2002-05-16 Hitachi, Ltd. Cylinder injection engine and method of controlling the engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03071110A1 *

Also Published As

Publication number Publication date
WO2003071110A1 (en) 2003-08-28
DE10207914A1 (en) 2003-09-04

Similar Documents

Publication Publication Date Title
DE3444356C2 (en)
DE4439918C2 (en) Device for supplying a fuel / air mixture to an internal combustion engine
DE19804161C2 (en) Four-stroke internal combustion engine
DE4439921C2 (en) Intake system of an internal combustion engine
DE3016139A1 (en) INSERT FOR FORMING A CHAMBER IN THE CYLINDER HEAD OF A DIESEL MACHINE
DE10110986A1 (en) Four stroke internal combustion IC engine for multi or single track motor vehicle, has carburetor used as fuel supply device set in common inlet pipe
DE3874101T2 (en) INLET DEVICE FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINES.
DE3029643C2 (en)
DE10128500C1 (en) Guiding system for fluid fed into the cylinders of an internal combustion engine comprises guide elements rotating in opposite directions about the main flow axes of inlet channels
DE3711859A1 (en) Multicylinder reciprocating piston internal combustion engine
DE19716642A1 (en) Multi-cylinder otto engine with fuel injection
DE102006009102A1 (en) Directly injected automotive internal combustion engine has an inlet manifold with adjustable vortex generators to cylinders
DE19853375B4 (en) Reciprocating internal combustion engine with spark ignition
WO2000019080A1 (en) Piston for a piston internal combustion engine
DE102006047515A1 (en) Double-acting internal combustion (IC) engine for motor vehicle, locates vertical component of main vector of fresh air flow from spin channel close to top dead center of piston in cylinder
EP1481150A1 (en) Cylinder head for an internal combustion engine
DE102021113858B3 (en) Combustion cylinder of an internal combustion engine
DE19635886A1 (en) Method for improving the combustion process of an internal combustion engine and internal combustion engine
DE10122352A1 (en) fuel injection system
DE102004050225A1 (en) Method for operating an internal combustion engine
DE10118490C2 (en) Arrangement of the intake system for an internal combustion engine with EGR device
EP1290320B1 (en) Fuel injection system and method for the injection of fuel
WO2000077358A1 (en) Piston-type internal combustion engine equipped with means for producing a secondary charge-air flow
DE102004021363B4 (en) Method for controlling the in-cylinder flow (intake swirl) on an internal combustion engine and directly injecting internal combustion engine
DE3434476A1 (en) Mixture-compressing, applied-ignition reciprocating-piston internal combustion engine

Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 20040923

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: UNGER, THORSTEN

Inventor name: TRAN, VAN-KHANH

Inventor name: NAGEL, NILS

Inventor name: MUELLER, STEPHAN

Inventor name: EBERL, MARKUS

Inventor name: BOCK, RAINER

17Q First examination report despatched

Effective date: 20070402

R17C First examination report despatched (corrected)

Effective date: 20070502

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

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20080321