DE3323593C2 - Cylinder head for an air-cooled diesel engine - Google Patents
Cylinder head for an air-cooled diesel engineInfo
- Publication number
- DE3323593C2 DE3323593C2 DE19833323593 DE3323593A DE3323593C2 DE 3323593 C2 DE3323593 C2 DE 3323593C2 DE 19833323593 DE19833323593 DE 19833323593 DE 3323593 A DE3323593 A DE 3323593A DE 3323593 C2 DE3323593 C2 DE 3323593C2
- Authority
- DE
- Germany
- Prior art keywords
- cylinder head
- floor
- area
- bridge
- joints
- 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.)
- Expired
Links
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
- F02F1/28—Cylinder heads having cooling means for air cooling
- F02F1/30—Finned cylinder heads
-
- 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
Abstract
Die Erfindung betrifft einen Zylinderkopf für luftgekühlte Dieselmotoren und löst das Problem der Wärmeableitung aus den thermisch am höchsten belasteten Bereichen des Zylinderkopfes und verhindert Rißbildungen in diesen Bereichen. Der Zylinderkopf (1) vom Wannentyp weist Kühlrippen auf, die vorwiegend an den Wänden (2) des Kopfes angeordnet sind. Der Bereich der Brücke (5) mit der Einspritzdüse (8) ist vom Umfangsgebiet des Bodens (3) durch Dilatationsfugen (6, 7) getrennt, die vom Boden (3) ausgehen und im Axialschnitt durch die Brücke mit der Bodenebene einen spitzen Winkel ( α) bilden, wobei sie zu den Wänden (2) des Kopfes gerichtet sind. Die Achse des Zylinders führt durch ein Dreieck, dessen Eckpunkte die Schnittpunkte der Ventilachsen und der Einspritzdüse (8) mit der Bodenebene bilden. Die Entfernung der Dilatationsfugen (6, 7) vergrößert sich im Querschnitt der Brücke (5) in Richtung vom Boden aus.The invention relates to a cylinder head for air-cooled diesel engines and solves the problem of heat dissipation from the thermally most heavily loaded areas of the cylinder head and prevents cracks from forming in these areas. The pan-type cylinder head (1) has cooling fins which are mainly arranged on the walls (2) of the head. The area of the bridge (5) with the injection nozzle (8) is separated from the circumferential area of the floor (3) by expansion joints (6, 7) which extend from the floor (3) and form an acute angle ( α), whereby they are directed towards the walls (2) of the head. The axis of the cylinder leads through a triangle, the corner points of which form the intersection of the valve axes and the injection nozzle (8) with the floor plane. The distance of the expansion joints (6, 7) increases in the cross section of the bridge (5) in the direction from the ground.
Description
verhindern auch das Entstehen von Rissen an den Fugenenden, weil sich die Fugen in den Richtungen des intensivsten Wärmeabflusses erstrecken.also prevent the formation of cracks at the joint ends, because the joints extend in the directions of the most intense heat dissipation.
Zur Verbesserung der Wärmeableitung von der Brükke 5 sind die Ventile 9,10 gegenüber der Zylinderachse derart versetzt, daß das Mitteigebiet des Kopfes 1 freibleibt. Die Einspritzdüse 8 sitzt derart im Bereich der Brücke 5 zwischen den Ventilen 9,10, daß die Zylinderachse durch ein Dreieck führt, dessin Eckpunkt die Achsenschnittpunkte der Ventile 9,10 und der Einspritzdüse 8 mit der Ebene des Bodens 3 bilden. Bei einer Strömungsrichtung 5 der Kühlluft ist der durch den Schnittpunkt der Achse des Saugventils 9 mit der Bodenebene definierte Eckpunkt dieses Dreiecks gegen die Richtung S orientiert. Der durch den Schnittpunkt der Achse der Einspritzdüse 8 mit der Bodenebene definierte Eckpunkt Hegt in der Projektion in der zur Strömungsrichtung S senkrechten Ebene den Wänden 2 am nächsten. Dabei vergrößert sich der Querschnitt der durch die Dilatationsfugen 6, 7 begrenzten Brücke in Richtung des Saugventils 9. Auch diese Maßnahmen verbessern die Wärmeableitung aus den thermisch am ;»öchsten belasteten Bereichen des Kopfes 1.In order to improve the dissipation of heat from the bridge 5, the valves 9, 10 are offset with respect to the cylinder axis in such a way that the central region of the head 1 remains free. The injection nozzle 8 is seated in the area of the bridge 5 between the valves 9, 10 that the cylinder axis passes through a triangle, the corner point of which forms the intersections of the axes of the valves 9, 10 and the injection nozzle 8 with the plane of the base 3. In the case of a flow direction 5 of the cooling air, the corner point of this triangle defined by the intersection of the axis of the suction valve 9 with the floor plane is oriented against the direction S. The corner point defined by the intersection of the axis of the injection nozzle 8 with the floor plane lies closest to the walls 2 in the projection in the plane perpendicular to the flow direction S. The cross section of the bridge delimited by the expansion joints 6, 7 increases in the direction of the suction valve 9. These measures also improve the heat dissipation from the thermally most exposed areas of the head 1.
Aus technologischen Gründen haben bei der Bearbeitung des Brennraumteils 4 die Dilatationsfugen 6, 7 einen veränderlichen Abstand zur Brennraumachse. Gemäß F i g. 2 verläuft die eine Dilatationsfuge 6 gerade und unsymmetrisch (schräg) zur Zylinderachse. Die zweite Dilatationsfuge 7 folgt einem Kreisbogen, dessen Mitte neben der Mitte des Brennraumteils 4 liegt und der die Einspritzdüse 8 teilweise umgibt.For technological reasons, the expansion joints 6, 7 have one when machining the combustion chamber part 4 variable distance to the axis of the combustion chamber. According to FIG. 2, the one dilatation joint 6 runs straight and asymmetrical (oblique) to the cylinder axis. The second dilatation 7 follows an arc of a circle Located in the middle next to the middle of the combustion chamber part 4 and which partially surrounds the injection nozzle 8.
In F i g. 1 und 3 sind zwei Ausführungsbeispiele der Dilatationsfugen 6, 7 und 6', T dargestellt Die Dilatationsfugen 6', T haben nach dem Axialschnitt gemäß einen geradlinien Verlauf und die Dilatationsfugen 6, 7 sind nach dem Axialschnitt gemäß Fig.! abgekröpft Zur Erfüllung der oben angeführten Anforderungen sind die geeignetsten (für den gegebenen Typ des Kopfes) Winkel zwischen den Dilatationfugen 6', 7' und der Ebene des Bodens 3 des Kopfes 1 größer als 60°; für die Dilatationsfugen 6, 7 gilt dies für den unteren Teil, ihr oberer Teil bildet mit der Ebene des Bodens 3 des Kopfes 1 den Winkel im Bereich von 30 bis 60°.In Fig. 1 and 3, two exemplary embodiments of the expansion joints 6, 7 and 6 ', T are shown. The expansion joints 6', T have a straight course after the axial section according to FIG. cranked To meet the above requirements, the most suitable (for the given type of head) angles between the dilatation joints 6 ', 7' and the plane of the bottom 3 of the head 1 are greater than 60 °; for the dilatation joints 6, 7 this applies to the lower part; their upper part forms an angle in the range from 30 to 60 ° with the plane of the base 3 of the head 1.
Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings
5050
5555
6060
Claims (7)
ßenwinkel bilden, und bei dem die Kühlrippen auch 10 Einen derartigen Zylinderkopf zeigt die DE-AS außen an den einen wannenförmigen Freiraum be- 12 67 028. Die mit Blecheinlagen ausgefüllten Dilatagrenzenden Wänden des Zylinderkopfes angeordnet tionsfugen in Gestalt einer ringförmigen Nut weist dasind, dadurchgekennzeichnet, bei einen in Umfangsrichuing innen oder außen verlaufenden schmalen Spalt auf. Die Dilatationsfugen verlau-1. Cylinder head for an air-cooled diesel engine injection nozzle, a combustion chamber part with sheet metal inserts with cooling fins, a dilatation joint filled in the area of the bridge 5, the injection nozzle located in the cylinder head boom between the valves, which open out and with the floor level a pointed combustion chamber part filled with sheet metal inserts. Form outer angles, and in which the cooling fins also th dilation joints, which in the cylinder head base open out to the outside of a trough-shaped free space and are arranged with the base plane of a pointed outer wall of the cylinder head,
Form ßenwinkel, and in which the cooling fins also 10. The DE-AS shows such a cylinder head on the outside of the one tub-shaped free space. with a narrow gap running in the circumferential direction inside or outside. The expansion joints leave
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS496882A CS226990B1 (en) | 1982-07-01 | 1982-07-01 | Cylinder head ofair-cooled diesel engines |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3323593A1 DE3323593A1 (en) | 1984-01-05 |
DE3323593C2 true DE3323593C2 (en) | 1989-04-06 |
Family
ID=5393602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19833323593 Expired DE3323593C2 (en) | 1982-07-01 | 1983-06-30 | Cylinder head for an air-cooled diesel engine |
Country Status (6)
Country | Link |
---|---|
CS (1) | CS226990B1 (en) |
DD (1) | DD230604A3 (en) |
DE (1) | DE3323593C2 (en) |
GB (1) | GB2124702B (en) |
RU (1) | RU1820016C (en) |
SU (1) | SU1291715A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4844030A (en) * | 1985-12-12 | 1989-07-04 | Cummins Engine Company, Inc. | Thermal fatigue resistant cylinder head |
AT413859B (en) * | 2003-03-21 | 2006-06-15 | Avl List Gmbh | Internal combustion engine |
US6874479B2 (en) | 2003-03-21 | 2005-04-05 | Avl List Gmbh | Internal combustion engine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB823837A (en) * | 1957-04-02 | 1959-11-18 | Gen Motors Corp | Improvements in or relating to the manufacture of cast members adapted to form parts of combustion chambers |
DE1267028B (en) * | 1964-09-18 | 1968-04-25 | Kloeckner Humboldt Deutz Ag | Cylinder head of a four-stroke reciprocating internal combustion engine |
-
1982
- 1982-07-01 CS CS496882A patent/CS226990B1/en unknown
-
1983
- 1983-06-24 SU SU837773028A patent/SU1291715A1/en active
- 1983-06-24 RU SU7773028 patent/RU1820016C/en active
- 1983-06-28 DD DD25243283A patent/DD230604A3/en not_active IP Right Cessation
- 1983-06-29 GB GB08317645A patent/GB2124702B/en not_active Expired
- 1983-06-30 DE DE19833323593 patent/DE3323593C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
RU1820016C (en) | 1993-06-07 |
GB2124702B (en) | 1985-11-20 |
CS226990B1 (en) | 1984-04-16 |
SU1291715A1 (en) | 1987-02-23 |
GB2124702A (en) | 1984-02-22 |
GB8317645D0 (en) | 1983-08-03 |
DE3323593A1 (en) | 1984-01-05 |
DD230604A3 (en) | 1985-12-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8363 | Opposition against the patent | ||
8366 | Restricted maintained after opposition proceedings | ||
8381 | Inventor (new situation) |
Free format text: JONAS, FRANTISEK, DIPL.-ING., KOPRIVNICE, CS KROUPA, PETR, DIPL.-ING., PRAG/PRAHA, CS POSPISIL, KAREL, DIPL.-ING., KLECANY, CS |
|
8305 | Restricted maintenance of patent after opposition | ||
D4 | Patent maintained restricted | ||
8339 | Ceased/non-payment of the annual fee |