WO2003071110A1 - Cylinder head for an internal combustion engine - Google Patents
Cylinder head for an internal combustion engine Download PDFInfo
- Publication number
- WO2003071110A1 WO2003071110A1 PCT/EP2003/000626 EP0300626W WO03071110A1 WO 2003071110 A1 WO2003071110 A1 WO 2003071110A1 EP 0300626 W EP0300626 W EP 0300626W WO 03071110 A1 WO03071110 A1 WO 03071110A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- combustion chamber
- inlet
- internal combustion
- combustion engine
- fuel
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 49
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030742498 EP1481150A1 (en) | 2002-02-23 | 2003-01-23 | Cylinder head for an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10207914A DE10207914A1 (en) | 2002-02-23 | 2002-02-23 | Cylinder head for an internal combustion engine |
DE10207914.5 | 2002-02-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003071110A1 true WO2003071110A1 (en) | 2003-08-28 |
Family
ID=27674926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/000626 WO2003071110A1 (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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (2)
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 |
AT511721B1 (en) * | 2011-11-03 | 2013-02-15 | Avl List Gmbh | INTAKE TRACK FOR AN INTERNAL COMBUSTION ENGINE |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0558073A1 (en) * | 1992-02-28 | 1993-09-01 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Stratified burning international combustion engine |
JPH06248959A (en) * | 1993-03-02 | 1994-09-06 | Nissan Motor Co Ltd | Air intake device of internal combustion engine |
DE4445777A1 (en) | 1993-12-22 | 1995-06-29 | Nissan Motor | IC engine air inlet arrangement |
US5551392A (en) * | 1993-10-19 | 1996-09-03 | Fuji Jukogyo Kabushiki Kaisha | Engine air intake system |
WO2002038924A1 (en) * | 2000-10-30 | 2002-05-16 | Hitachi, Ltd. | Cylinder injection engine and method of controlling the engine |
-
2002
- 2002-02-23 DE DE10207914A patent/DE10207914A1/en not_active Withdrawn
-
2003
- 2003-01-23 EP EP20030742498 patent/EP1481150A1/en not_active Ceased
- 2003-01-23 WO PCT/EP2003/000626 patent/WO2003071110A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0558073A1 (en) * | 1992-02-28 | 1993-09-01 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Stratified burning international combustion engine |
JPH06248959A (en) * | 1993-03-02 | 1994-09-06 | Nissan Motor Co Ltd | Air intake device of internal combustion engine |
US5551392A (en) * | 1993-10-19 | 1996-09-03 | Fuji Jukogyo Kabushiki Kaisha | Engine air intake system |
DE4445777A1 (en) | 1993-12-22 | 1995-06-29 | Nissan Motor | IC engine air inlet arrangement |
WO2002038924A1 (en) * | 2000-10-30 | 2002-05-16 | Hitachi, Ltd. | Cylinder injection engine and method of controlling the engine |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 640 (M - 1717) 6 December 1994 (1994-12-06) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Also Published As
Publication number | Publication date |
---|---|
EP1481150A1 (en) | 2004-12-01 |
DE10207914A1 (en) | 2003-09-04 |
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