AT502089B1 - CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE - Google Patents
CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE Download PDFInfo
- Publication number
- AT502089B1 AT502089B1 AT0106305A AT10632005A AT502089B1 AT 502089 B1 AT502089 B1 AT 502089B1 AT 0106305 A AT0106305 A AT 0106305A AT 10632005 A AT10632005 A AT 10632005A AT 502089 B1 AT502089 B1 AT 502089B1
- Authority
- AT
- Austria
- Prior art keywords
- flow
- cylinder head
- main
- region
- cooling space
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 238000001816 cooling Methods 0.000 claims description 21
- 239000002826 coolant Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/248—Methods for avoiding thermal stress-induced cracks in the zone between valve seat openings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
2 AT 502 089 B12 AT 502 089 B1
Die Erfindung betrifft Zylinderkopf für eine Brennkraftmaschine mit zumindest einem Kühlraum, in welchem mindestens eine Haupt- und mindestens eine Nebenzuflussöffnung einmündet, wobei die Nebenzuflussöffnung im Wesentlichen quer zu einer Hauptströmungsrichtung im Kühlraum einmündet, wobei die Nebenzuflussöffnung in einem strömungsabgewandten Bereich 5 des Zylinderkopfes in den Kühlraum einmündet und wobei die Nebenzuflussöffnung unmittelbar stromabwärts einer Strömungsstörungsstelle in den Kühlraum einmündet.The invention relates to a cylinder head for an internal combustion engine having at least one cooling space, in which at least one main and at least one auxiliary inflow opens, wherein the Nebenzuflussöffnung opens substantially transversely to a main flow direction in the cooling chamber, wherein the Nebenzuflussöffnung in a region facing away from the flow 5 of the cylinder head into the cooling space opens and wherein the Nebenzuflussöffnung opens immediately downstream of a flow disturbance in the cold room.
Insbesondere bei Brennkraftmaschinen mit mehreren Zylindern und einem Zylinderkopf mit einem in Längsrichtung zur Motorquerrichtung durchströmten Kühlraum ist es zur Optimierung io des Kühlergebnisses in vielen Fällen erforderlich, pro Zylinder im Hauptkühlmittelstrom einen Nebenvolumenstrom zuzuführen, um thermisch kritische Bereiche, wie beispielsweise Ventilbrücken ausreichend kühlen zu können. Aus konstruktiven Gründen ist es dabei erforderlich, den Nebenvolumenstrom quer in den Hauptvolumenstrom einmünden zu lassen. Durch die Interaktion beider Einzelströme kommt es allerdings dabei zu erheblichen Strömungsverlusten. 15 Dabei wird der Durchfluss durch den üblicherweise schwächeren Nebenvolumenstrom vom Hauptvolumenstrom deutlich behindert.In particular, in internal combustion engines having a plurality of cylinders and a cylinder head with a cooled longitudinally to the engine transverse direction cooling space is required to optimize io the cooling result in many cases per cylinder in the main coolant flow to supply a secondary volume flow in order to cool thermally critical areas, such as valve bridges sufficient. For design reasons, it is necessary to allow the secondary volume flow to flow transversely into the main volume flow. Due to the interaction of both individual streams, however, there are considerable flow losses. 15 The flow is significantly hindered by the usually weaker secondary flow from the main flow.
Die JP 09324695 A offenbart einen Zylinderkopf für eine Brennkraftmaschine mit einem Kühlraum, in welchen ein Haupt- und ein Nebenzuflussöffnung einmündet, wobei die Nebenzufluss-20 Öffnung quer zur Hauptströmungsrichtung in den Kühlraum. Die Nebenzuflussöffnung ist dabei in einem strömungsabgewandten Bereich des Zylinderkopfes unmittelbar stromabwärts einer Strömungsstörungsstelle angeordnet. Die Strömungsstörungsstelle wird durch eine Abschirmung gebildet, welche die Hauptkühlmittelströmung zur Seitenwand des Zylinderkopfes ablenkt. 25JP 09324695 A discloses a cylinder head for an internal combustion engine having a cooling space into which opens a main and a secondary inflow opening, wherein the auxiliary inflow opening is transverse to the main flow direction in the cooling space. The auxiliary inflow opening is arranged in a region of the cylinder head which faces away from the flow immediately downstream of a flow disturbance point. The flow disturbance location is formed by a shield which deflects the main coolant flow to the side wall of the cylinder head. 25
Aufgabe der Erfindung ist es, diese Nachteile zu vermeiden und die Strömungsverluste bei Zusammenführung von zwei Kühlmittelströmen zu vermindern bzw. das Ausströmen des üblicherweise schwächeren Nebenvolumenstroms zu begünstigen. 30 Erfindungsgemäß wird dies dadurch erreicht, dass an der der Strömungsstörungsstelle gegenüberliegenden Seite des Kühlraumes die Wandkontur zur Erzielung eines gleichmäßigen Querschnittsverlaufes für die Hauptströmung der Strömungsstörungsstelle nachgeformt ist. Dies ermöglicht es, die Querschnittsänderung im Bereich der Strömungsstörungsstelle auszugleichen. 35The object of the invention is to avoid these disadvantages and to reduce the flow losses when bringing together two coolant streams or to favor the outflow of the usually weaker secondary volume flow. According to the invention, this is achieved in that, on the opposite side of the cooling space from the flow disturbance site, the wall contour is reproduced to obtain a uniform cross-sectional profile for the main flow of the flow disturbance point. This makes it possible to compensate for the change in cross section in the region of the flow disturbance point. 35
Durch die Strömungsstörungsstelle wird die Nebenzuflussöffnung vordem Hauptkühlmittelstrom abgedeckt, wodurch der Nebenvolumenstrom durch die Nebenzuflussöffnung in einem geschwindigkeitsarmen Bereich einmündet und damit nicht vom hohen Strömungsimpuls der Hauptströmung direkt beeinflusst werden kann. 40Due to the flow disturbance point, the auxiliary inflow opening is covered before the main coolant flow, whereby the secondary volume flow through the auxiliary inflow opening opens in a low-speed area and thus can not be directly influenced by the high flow impulse of the main flow. 40
In einer vorteilhaften Ausführungsvariante der Erfindung ist vorgesehen, dass die Strömungsstörungsstelle durch eine quer zur Hauptströmung ausgebildete Rippe gebildet ist. Alternativ dazu kann die Strömungsstörungsstelle auch durch eine rückspringende Strömungsstufe gebildet sein. Sowohl durch die Rippe, als auch durch die Strömungsstufe kommt es zu einem be-45 absichtigten Ablösung der Hauptströmung und zur Ausbildung eines strömungsarmen Bereiches unmittelbar stromabwärts der Strömungsstörungsstelle.In an advantageous embodiment of the invention it is provided that the flow disturbance point is formed by a rib formed transversely to the main flow. Alternatively, the flow disturbance point may also be formed by a receding flow stage. Both through the rib and through the flow stage there is a deliberate separation of the main flow and the formation of a low-flow area immediately downstream of the flow disturbance point.
Die besten Ergebnisse werden erzielt, wenn die Strömungsstörungsstelle im Bereich des Bodens des Kühlraumes, vorzugsweise im Bereich des Feuerdeckes des Zylinderkopfes angeord-50 net ist. Das Feuerdeck sollte dabei möglichst eben und flach, zumindest stromabwärts des Zusammenführungspunktes der beiden Strömungen ausgebildet sein. Befindet sich der Zusammenführungspunkt im Bereich der Ventilbrücke zweier Ventile eines Zylinders, so sind große Ventilabstände vorteilhaft, um Strömungsverluste zu vermeiden. 55 Die Erfindung wird im Folgenden anhand der Figuren näher erläutert.The best results are achieved when the flow disturbance point is in the region of the bottom of the cooling chamber, preferably in the region of the fire deck of the cylinder head angeord-50 net. The fire deck should be as flat and flat as possible, at least downstream of the merge point of the two flows. If the junction point is in the region of the valve bridge of two valves of a cylinder, then large valve distances are advantageous in order to avoid flow losses. The invention will be explained in more detail below with reference to the figures.
Claims (4)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0106305A AT502089B1 (en) | 2005-06-23 | 2005-06-23 | CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE |
| EP06450083A EP1736660B1 (en) | 2005-06-23 | 2006-06-22 | Cylinder head for an internal combustion engine |
| AT06450083T ATE552415T1 (en) | 2005-06-23 | 2006-06-22 | CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE |
| PL06450083T PL1736660T3 (en) | 2005-06-23 | 2006-06-22 | Cylinder head for an internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0106305A AT502089B1 (en) | 2005-06-23 | 2005-06-23 | CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AT502089A1 AT502089A1 (en) | 2007-01-15 |
| AT502089B1 true AT502089B1 (en) | 2007-07-15 |
Family
ID=36954699
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT0106305A AT502089B1 (en) | 2005-06-23 | 2005-06-23 | CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE |
| AT06450083T ATE552415T1 (en) | 2005-06-23 | 2006-06-22 | CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT06450083T ATE552415T1 (en) | 2005-06-23 | 2006-06-22 | CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1736660B1 (en) |
| AT (2) | AT502089B1 (en) |
| PL (1) | PL1736660T3 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09324695A (en) * | 1996-06-05 | 1997-12-16 | Daihatsu Motor Co Ltd | Structure of cylinder head in internal combustion engine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB766187A (en) * | 1953-11-26 | 1957-01-16 | Ricardo & Co Engineers | Improvements in detachable cylinder head constructions for liquid-cooled internal combustion engines |
| DE3208341A1 (en) * | 1982-03-09 | 1983-09-15 | Klöckner-Humboldt-Deutz AG, 5000 Köln | CYLINDER HEAD FOR A WATER-COOLED INTERNAL COMBUSTION ENGINE |
| DE19644409C1 (en) * | 1996-10-25 | 1998-01-29 | Daimler Benz Ag | Cylinder head of multi=cylinder internal combustion engine |
| DE19943001C1 (en) * | 1999-09-09 | 2000-10-26 | Porsche Ag | Water-cooled motor cylinder head has a unit in the coolant flow channel for an additional coolant flow at the known cylinder head hot spots |
| DE10237664A1 (en) * | 2002-08-16 | 2004-02-19 | Dr.Ing.H.C. F. Porsche Ag | Cylinder head for water-cooled multi-cylinder internal combustion engine has main cooling flow on inflow side between two exhaust valves |
-
2005
- 2005-06-23 AT AT0106305A patent/AT502089B1/en not_active IP Right Cessation
-
2006
- 2006-06-22 EP EP06450083A patent/EP1736660B1/en active Active
- 2006-06-22 PL PL06450083T patent/PL1736660T3/en unknown
- 2006-06-22 AT AT06450083T patent/ATE552415T1/en active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09324695A (en) * | 1996-06-05 | 1997-12-16 | Daihatsu Motor Co Ltd | Structure of cylinder head in internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1736660A3 (en) | 2007-12-12 |
| ATE552415T1 (en) | 2012-04-15 |
| PL1736660T3 (en) | 2012-09-28 |
| EP1736660B1 (en) | 2012-04-04 |
| AT502089A1 (en) | 2007-01-15 |
| EP1736660A2 (en) | 2006-12-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EFA | Change in the company name | ||
| MM01 | Lapse because of not paying annual fees |
Effective date: 20240623 |