EP0899445B1 - Liquid cooled cylinder head for a multi-cylinder internal combustion engine - Google Patents
Liquid cooled cylinder head for a multi-cylinder internal combustion engine Download PDFInfo
- Publication number
- EP0899445B1 EP0899445B1 EP98114792A EP98114792A EP0899445B1 EP 0899445 B1 EP0899445 B1 EP 0899445B1 EP 98114792 A EP98114792 A EP 98114792A EP 98114792 A EP98114792 A EP 98114792A EP 0899445 B1 EP0899445 B1 EP 0899445B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder head
- internal combustion
- combustion engine
- cylinder
- screw
- 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 - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 16
- 239000007788 liquid Substances 0.000 title 1
- 239000002826 coolant Substances 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000000498 cooling water Substances 0.000 description 10
- 238000009826 distribution Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000036316 preload Effects 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
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
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
Definitions
- the invention relates to a liquid-cooled cylinder head a multi-cylinder internal combustion engine according to the Preamble of claim 1.
- JP-PS 59 96 341 is a generic liquid-cooled Cylinder head for a multi-cylinder internal combustion engine known.
- the cylinder head has conventional screw pipes for the cylinder head bolts on which the clamping forces of the cylinder head bolts on the small cross section of the whistle of lead the ceiling to the bottom plate of the cylinder head.
- the bolt clamping forces also in the ground areas between the Distributing screw pipes is between the screw pipes a T-shaped bending beam arranged over a rib is connected to the gas exchange channels and the bolt clamping forces should also lead to the intermediate areas.
- a disadvantage of such an embodiment for distributing the Screw clamping forces that the introduction of force is too uneven over the above-mentioned bending beam to an optimal uniform distribution of forces also in the area to reach between the screw pipes, given the rigidity the continuous screw whistles over their length only a small Force introduction into the bending beam permits.
- the over the Bending medium in the combustion chamber boundary of the cylinder head floor initiated bias is therefore low and holds one increased gas pressure of the internal combustion engine not stood.
- a uniform surface pressure between the cylinder head and the crankcase arranged cylinder head gasket so an optimal To ensure sealing is therefore not possible.
- Another disadvantage of the design is the enormous space requirement of the bending beam, whereby this execution at very cramped space in the cylinder head not applicable is, especially if for a better distribution of forces the bending beam should be designed stronger.
- the invention is based on the object, a liquid-cooled Cylinder head of a multi-cylinder internal combustion engine to create, with the even in tight spaces one highest possible and uniform surface pressure of the cylinder head gasket also in the areas between the cylinder head bolts to achieve.
- An advantage of the invention is the simplification of Screw pipes, in the adjacent wall sections of the gas exchange channels Thickened in the area of the cylinder head bolts are formed and thereby form ribs, which are part of Screw pipes are.
- the screw pipes are not formed as a continuous columns.
- the simplification of Screw pipes pulls a lighter weight of the cylinder head after himself.
- Another significant advantage lies in the optimal distribution of forces of the bolt clamping force over the Screw pipes in the cylinder head. Because the screw pipes are not are designed as "conventional columns" which the Screw force only on the small column cross section of the Ceiling lead to the bottom of the cylinder head, but in the connection to a columnar portion ribs comprising a directed distribution of forces in the areas between the Cylinder head bolts allow.
- the bolt tension of the Cylinder head bolts may be in the shortly after the introduction conventional columnar section of the screw pipe distribute over the adjoining ribs in the cylinder head, causing the surface pressure on the cylinder head gasket evened, especially for the benefit of the areas in the middle under the gas exchange channels. This ensures that the surface pressure acting on the cylinder head gasket the resulting during operation of the internal combustion engine enormous gas forces due to the even distribution of forces the bolt clamping forces better withstands.
- the cylinder head After starting the engine, the cylinder head will heat up and the crankcase of the internal combustion engine and This will also heat up the cooling water very quickly. advantageously, are therefore the cylinder head bolts over a Part of their length from a section of the cooling water space completely surrounded, which they also very much on the cooling water quickly brought to the temperature of the surrounding components become. Because the cylinder head bolts are parallel to the cylinder head as well as warm up to the crankcase and thereby likewise expand, becomes excessive stress on the cylinder head material avoided, which makes it possible on the previous conventional screwpipe (pillar) to dispense.
- pillar screwpipe
- a liquid-cooled cylinder head 1 for a Not shown multi-cylinder internal combustion engine the left half being a first embodiment and the right half a second embodiment of the invention represents.
- the cylinder head 1 has a cooling water chamber 2 (see FIG. 2), of which in Fig. 1, only the inlet 2a is shown. Of the Cooling water space 2 is down from a cylinder head bottom. 3 and up from a distance above the cylinder head floor 3 arranged cylinder head cover 4 limited. In the second embodiment the cylinder head 1 additionally has one in the inlet 2a arranged, downwardly projecting projection 16th on.
- cylinder head clamping screws 8 is the cylinder head 1 with the interposition of one here Not shown cylinder head gasket with a crankcase 9 of the internal combustion engine detachably connected.
- the pressing of the Cylinder head 1 to the crankcase 9 and thus the bracing the cylinder head gasket between cylinder head 1 and crankcase 9 takes place when tightening the cylinder head screws. 8 with the necessary bolt preload.
- the cylinder head bolts extend 8 free through a section, in this case the inlet 2a, the Cooling water space 2 in the cylinder head 1 and through a cooling water space section 10 in the crankcase 9.
- the cylinder head bolts 8 are thereby flowed around by the cooling water and quickly to the Temperature of the surrounding components 1, 9 brought.
- the cylinder head bolts 8 are described in more detail below screw threads 11 of the cylinder head 1 passed, which for Distribution of the bolt clamping forces of the cylinder head bolts 8 serve from the cylinder head cover 4 to the cylinder head floor 3.
- the screw pipes 11 for the cylinder head bolts 8 partially through adjacent wall sections 12th in particular similar gas exchange channels 5, such as Inlet channels, formed, wherein the wall sections 12 in Area of the cylinder head bolts 8 to form ribs 13th thickened are formed.
- the screw pipes 11 causes a distribution of the bolt clamping forces in areas 14 below the gas exchange channels. 5 (see Fig. 1).
- the force is introduced by the cylinder head bolt 8 in the cylinder head 1 and the subsequent distribution of forces via the ribs 13 in the regions 14 below the gas exchange channels 5 marked with dash-dotted arrows 15, wherein the projection 16 in the second embodiment, no Influence on this distribution of forces, because the projection 16 is not supported from below, but free in the inlet 2a or the cooling water space portion 10 protrudes.
- the preload out the rib 13 is characterized by their particular Anformung to the wall sections 12 of the gas exchange channels 5 in the direction of arrow 15 on the Cylinder head gasket aligned, which also in the cylinder head bolts 8 adjacent areas 14 between the Gas exchange channels 5 a sufficient surface pressure on the Seal is achieved.
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- 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
Die Erfindung bezieht sich auf einen flüssigkeitsgekühlten Zylinderkopf einer mehrzylindrigen Brennkraftmaschine gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a liquid-cooled cylinder head a multi-cylinder internal combustion engine according to the Preamble of claim 1.
Aus der JP-PS 59 96 341 ist ein gattungsgemäßer flüssigkeitsgekühlter Zylinderkopf für eine mehrzylindrige Brennkraftmaschine bekannt. Der Zylinderkopf weist herkömmliche Schraubenpfeifen für die Zylinderkopfschrauben auf, die die Spannkräfte der Zylinderkopfschrauben auf dem kleinen Querschnitt der Pfeife von der Decke bis zur Bodenplatte des Zylinderkopfes führen. Um nun die Schraubenspannkräfte auch in die Bodenbereiche zwischen den Schraubenpfeifen zu verteilen, ist zwischen den Schraubenpfeifen ein T-förmiger Biegebalken angeordnet, der über eine Rippe mit den Gaswechselkanälen verbunden ist und die Schraubenspannkräfte auch in die Zwischenbereiche führen soll.From JP-PS 59 96 341 is a generic liquid-cooled Cylinder head for a multi-cylinder internal combustion engine known. The cylinder head has conventional screw pipes for the cylinder head bolts on which the clamping forces of the cylinder head bolts on the small cross section of the whistle of lead the ceiling to the bottom plate of the cylinder head. To now the bolt clamping forces also in the ground areas between the Distributing screw pipes is between the screw pipes a T-shaped bending beam arranged over a rib is connected to the gas exchange channels and the bolt clamping forces should also lead to the intermediate areas.
Von Nachteil bei einer derartigen Ausführung zur Verteilung der Schraubenspannkräfte ist allerdings, daß die Kräfteeinleitung über den oben erwähnten Biegeträger zu ungleichmäßig ist, um eine optimale gleichmäßige Kräfteverteilung auch im Bereich zwischen den Schraubenpfeifen zu erreichen, da die Steifigkeit der durchgehenden Schraubenpfeifen über ihre Länge nur eine geringe Krafteinleitung in den Biegeträger zuläßt. Die über den Biegeträger in die Brennraumbegrenzung des Zylinderkopfbodens eingeleitete Vorspannung ist deshalb nur gering und hält einem erhöhten Gasdruck der Brennkraftmaschine nicht stand. Eine gleichmäßige Flächenpressung der zwischen Zylinderkopf und Kurbelgehäuse angeordneten Zylinderkopfdichtung, um so eine optimale Abdichtung zu gewährleisten, ist somit nicht zu erreichen. Ein weiterer Nachteil der Ausführung stellt der enorme Platzbedarf des Biegebalkens dar, wodurch diese Ausführung bei sehr beengten Platzverhältnissen im Zylinderkopf nicht anwendbar ist, insbesondere wenn zur Erzielung einer besseren Kräfteverteilung der Biegebalken stärker ausgelegt werden soll.A disadvantage of such an embodiment for distributing the Screw clamping forces, however, that the introduction of force is too uneven over the above-mentioned bending beam to an optimal uniform distribution of forces also in the area to reach between the screw pipes, given the rigidity the continuous screw whistles over their length only a small Force introduction into the bending beam permits. The over the Bending medium in the combustion chamber boundary of the cylinder head floor initiated bias is therefore low and holds one increased gas pressure of the internal combustion engine not stood. A uniform surface pressure between the cylinder head and the crankcase arranged cylinder head gasket, so an optimal To ensure sealing is therefore not possible. Another disadvantage of the design is the enormous space requirement of the bending beam, whereby this execution at very cramped space in the cylinder head not applicable is, especially if for a better distribution of forces the bending beam should be designed stronger.
Zum allgemeinen technischen Hintergrund wird noch auf die DE 38 36 117 C1 verwiesen.The general technical background is still on the DE 38 36 117 C1.
Der Erfindung liegt die Aufgabe zugrunde, einen flüssigkeitsgekühlten Zylinderkopf einer mehrzylindrigen Brennkraftmaschine zu schaffen, mit dem auch bei beengten Platzverhältnissen eine möglichst hohe und gleichmäßige Flächenpressung der Zylinderkopfdichtung auch in den Bereichen zwischen den Zylinderkopfschrauben zu erzielen ist.The invention is based on the object, a liquid-cooled Cylinder head of a multi-cylinder internal combustion engine to create, with the even in tight spaces one highest possible and uniform surface pressure of the cylinder head gasket also in the areas between the cylinder head bolts to achieve.
Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruchs 1 gegebenen Merkmale gelöst.This object is achieved by the characterizing in the Patent claim 1 given given characteristics.
Ein Vorteil der Erfindung besteht in der Vereinfachung der Schraubenpfeifen, bei der benachbarte Wandabschnitte der Gaswechselkanäle im Bereich der Zylinderkopfschrauben verdickt ausgeformt sind und dadurch Rippen ausbilden, die Teil der Schraubenpfeifen sind. Die Schraubenpfeifen sind dadurch nicht als durchgehende Säulen ausgebildet. Die Vereinfachung der Schraubenpfeifen zieht ein geringeres Gewicht des Zylinderkopfes nach sich. Ein weiterer wesentlicher Vorteil liegt in der optimalen Kräfteverteilung der Schraubenspannkraft über die Schraubenpfeifen im Zylinderkopf. Da die Schraubenpfeifen nicht als "konventionelle Säulen" ausgebildet sind, welche die Schraubenkraft nur auf dem kleinen Säulenquerschnitt von der Decke bis zum Boden des Zylinderkopfes führen, sondern im Anschluß an einen säulenartigen Abschnitt Rippen umfassen, die eine gerichtete Kräfteverteilung in die Bereiche zwischen den Zylinderkopfschrauben ermöglichen. Die Schraubenspannkraft der Zylinderkopfschrauben kann sich kurz nach der Einleitung in den konventionellen säulenartigen Abschnitt der Schraubenpfeife über die daran anschließenden Rippen in den Zylinderkopf verteilen, wodurch sich die Flächenpressung auf die Zylinderkopfdichtung vergleichmäßigt, insbesondere zum Vorteil der Bereiche in der Mitte unter den Gaswechselkanälen. Damit ist sichergestellt, daß die auf die Zylinderkopfdichtung wirkende Flächenpressung den im Betrieb der Brennkraftmaschine entstehenden enormen Gaskräften aufgrund der gleichmäßigen Kräfteverteilung der Schraubenspannkräfte besser standhält.An advantage of the invention is the simplification of Screw pipes, in the adjacent wall sections of the gas exchange channels Thickened in the area of the cylinder head bolts are formed and thereby form ribs, which are part of Screw pipes are. The screw pipes are not formed as a continuous columns. The simplification of Screw pipes pulls a lighter weight of the cylinder head after himself. Another significant advantage lies in the optimal distribution of forces of the bolt clamping force over the Screw pipes in the cylinder head. Because the screw pipes are not are designed as "conventional columns" which the Screw force only on the small column cross section of the Ceiling lead to the bottom of the cylinder head, but in the connection to a columnar portion ribs comprising a directed distribution of forces in the areas between the Cylinder head bolts allow. The bolt tension of the Cylinder head bolts may be in the shortly after the introduction conventional columnar section of the screw pipe distribute over the adjoining ribs in the cylinder head, causing the surface pressure on the cylinder head gasket evened, especially for the benefit of the areas in the middle under the gas exchange channels. This ensures that the surface pressure acting on the cylinder head gasket the resulting during operation of the internal combustion engine enormous gas forces due to the even distribution of forces the bolt clamping forces better withstands.
Nach dem Starten der Brennkraftmaschine erwärmen sich der Zylinderkopf sowie das Kurbelgehäuse der Brennkraftmaschine und heizen dadurch auch das Kühlwasser sehr schnell mit auf. Vorteilhafterweise sind daher die Zylinderkopfschrauben über einen Teil ihrer Länge von einem Abschnitt des Kühlwasserraumes vollständig umgeben, wodurch sie über das Kühlwasser ebenfalls sehr schnell auf die Temperatur der umgebenden Bauteile gebracht werden. Da sich die Zylinderkopfschrauben parallel zum Zylinderkopf sowie zum Kurbelgehäuse erwärmen und sich dadurch ebenfalls ausdehnen, wird eine übermäßige Beanspruchung des Zylinderkopf-Werkstoffes vermieden, wodurch es möglich wird auf die bisherige konventionelle Schraubenpfeife (Säule) zu verzichten.After starting the engine, the cylinder head will heat up and the crankcase of the internal combustion engine and This will also heat up the cooling water very quickly. advantageously, are therefore the cylinder head bolts over a Part of their length from a section of the cooling water space completely surrounded, which they also very much on the cooling water quickly brought to the temperature of the surrounding components become. Because the cylinder head bolts are parallel to the cylinder head as well as warm up to the crankcase and thereby likewise expand, becomes excessive stress on the cylinder head material avoided, which makes it possible on the previous conventional screwpipe (pillar) to dispense.
Weitere Ausgestaltungen und Vorteile der Erfindung gehen aus der Beschreibung hervor.Further embodiments and advantages of the invention will be apparent the description.
Ein Ausführungsbeispiel der Erfindung ist im folgenden in zwei Zeichnungen mit weiteren Einzelheiten näher erläutert, und zwar zeigen:
- Fig. 1
- einen Teil eines Längsschnitts durch einen flüssigkeitsgekühlten Zylinderkopf einer mehrzylindrigen Brennkraftmaschine, der mit einem Kurbelgehäuse der Brennkraftmaschine verbunden ist, und
- Fig. 2
- einen Teil eines Schnittes durch den Zylinderkopf der Brennkraftmaschine gemäß Linie II-II aus Fig. 1.
- Fig. 1
- a portion of a longitudinal section through a liquid-cooled cylinder head of a multi-cylinder internal combustion engine, which is connected to a crankcase of the internal combustion engine, and
- Fig. 2
- a part of a section through the cylinder head of the internal combustion engine according to line II-II of Fig. 1st
In Fig. 1 ist ein flüssigkeitsgekühlter Zylinderkopf 1 für eine nicht näher dargestellte mehrzylindrige Brennkraftmaschine dargestellt, wobei die linke Hälfte ein erstes Ausführungsbeispiel und die rechte Hälfte ein zweites Ausführungsbeispiel der Erfindung darstellt.In Fig. 1, a liquid-cooled cylinder head 1 for a Not shown multi-cylinder internal combustion engine, the left half being a first embodiment and the right half a second embodiment of the invention represents.
Der Zylinderkopf 1 weist einen Kühlwasseraum 2 auf (siehe Fig.
2), von dem in Fig. 1 nur der Zulauf 2a dargestellt ist. Der
Kühlwasserraum 2 ist nach unten von einem Zylinderkopfboden 3
und nach oben von einer mit Abstand über dem Zylinderkopfboden
3 angeordneten Zylinderkopfdecke 4 begrenzt. Im zweiten Ausführungsbeispiel
weist der Zylinderkopf 1 zusätzlich einen im Zulauf
2a angeordneten, nach unten freistehenden Vorsprung 16
auf. Im Kühlwasserraum 2 sind Gaswechselkanäle 5 sowie in Fig.
2 gezeigte Kammern 6 für Zündkerzen und/oder Einspritzdüsen angeordnet,
wobei die Gaswechselkanäle 5 gemäß Fig. 2 in Richtung
einer Motorquerachse 7 verlaufen.The cylinder head 1 has a cooling water chamber 2 (see FIG.
2), of which in Fig. 1, only the inlet 2a is shown. Of the
Durch in den Figuren nur angedeutete Zylinderkopfspannschrauben
8 ist der Zylinderkopf 1 unter Zwischenschaltung einer hier
nicht dargestellten Zylinderkopfdichtung mit einem Kurbelgehäuse
9 der Brennkraftmaschine lösbar verbunden. Das Anpressen des
Zylinderkopfes 1 an das Kurbelgehäuse 9 und damit das Verspannen
der Zylinderkopfdichtung zwischen Zylinderkopf 1 und Kurbelgehäuse
9 erfolgt beim Anziehen der Zylinderkopfschrauben 8
mit der nötigen Schraubenvorspannung. Über mindestens einen
Teil ihrer Länge erstrecken sich die Zylinderkopfschrauben 8
frei durch einen Abschnitt, in diesem Fall dem Zulauf 2a, des
Kühlwasserraumes 2 im Zylinderkopf 1 und durch einen Kühlwasserraumabschnitt
10 im Kurbelgehäuse 9. Die Zylinderkopfschrauben
8 werden dadurch vom Kühlwasser umströmt und rasch auf die
Temperatur der umgebenden Bauteile 1, 9 gebracht. Die Zylinderkopfschrauben
8 sind durch unten näher beschriebene Schraubenpfeifen
11 des Zylinderkopfes 1 hindurchgeführt, welche zur
Verteilung der Schraubenspannkräfte der Zylinderkopfschrauben 8
von der Zylinderkopfdecke 4 zum Zylinderkopfboden 3 dienen. By in the figures only indicated cylinder head clamping screws
8 is the cylinder head 1 with the interposition of one here
Not shown cylinder head gasket with a
Wie aus Fig. 2 ersichtlich ist, sind erfindungsgemäß bei beiden
Ausführungsbeispielen die Schraubenpfeifen 11 für die Zylinderkopfschrauben
8 teilweise durch benachbarte Wandabschnitte 12
insbesondere gleichartiger Gaswechselkanäle 5, wie beispielsweise
Einlaßkanäle, gebildet, wobei die Wandabschnitte 12 im
Bereich der Zylinderkopfschrauben 8 zur Bildung von Rippen 13
verdickt ausgeformt sind. Diese erfindungsgemäße Ausgestaltung
der Schraubenpfeifen 11 bewirkt eine Verteilung der Schraubenspannkräfte
in Bereiche 14 unterhalb der Gaswechselkanäle 5
(siehe Fig. 1).As can be seen from Fig. 2, according to the invention in both
Embodiments, the screw pipes 11 for the cylinder head bolts
8 partially through adjacent wall sections 12th
in particular similar
In Fig. 1 ist die Krafteinleitung durch die Zylinderkopfschraube
8 in den Zylinderkopf 1 und die anschließende Kräfteverteilung
über die Rippen 13 in die Bereiche 14 unterhalb der Gaswechselkanäle
5 mit strichpunktierten Pfeilen 15 gekennzeichnet,
wobei der Vorsprung 16 im zweiten Ausführungsbeispiel keinerlei
Einfluß auf diese Kräfteverteilung hat, da der Vorsprung
16 nicht von unten gestützt wird, sondern frei in den Zulauf 2a
bzw. den Kühlwasserraumabschnitt 10 ragt. Die Vorspannkraft aus
der Rippe 13 ist durch deren besondere Anformung an die Wandabschnitte
12 der Gaswechselkanäle 5 in Pfeilrichtung 15 auf die
Zylinderkopfdichtung ausgerichtet, wodurch auch in den den Zylinderkopfschrauben
8 benachbarten Bereichen 14 zwischen den
Gaswechselkanälen 5 eine ausreichende Flächenpressung auf die
Dichtung erzielt wird.In Fig. 1, the force is introduced by the cylinder head bolt
8 in the cylinder head 1 and the subsequent distribution of forces
via the
Die Dimensionierung des Mindestquerschnitts ARmin der teilweise
die Schraubenpfeife 11 bildenden Rippe 13 ist näherungsweise
durch die Formel
- ARmin =
- erforderlicher Mindestquerschnitt der Rippe,
- dK =
- Dicke der Gaswechselkanalwand,
- dV =
- Dicke der einen Teil der Rippe bildenden Verdickung,
- bV =
- Breite der Verdickung,
- FS =
- Schraubenkraft der Zylinderkopfschraube und
- σSstreck =
- Streckgrenze der Zylinderkopfschraube.
- A Rmin =
- Required minimum cross section of the rib,
- d K =
- Thickness of the gas exchange channel wall,
- d V =
- Thickness of the part of the rib forming thickening,
- b V =
- Width of thickening,
- F S =
- Screw force of the cylinder head bolt and
- σ stretch =
- Yield point of the cylinder head bolt.
Claims (2)
- Liquid-cooled cylinder head for a multi-cylinder internal combustion chamber with a coolant water chamber, in which gas ducts extending in the direction of an engine transverse axis and at least one chamber for a spark plug and/or an injection nozzle are arranged, and having screw columns for distributing the screw tensioning forces of the cylinder head screws, the cylinder head being connectable to a crankcase of the internal combustion engine with a cylinder head gasket inserted in between,
characterised in that
adjacent wall sections (12) of the gas exchange ducts (5) are of a thicker design in the region of the cylinder head screws (8) to form ribs (13), which are part of the screw columns (11). - Liquid-cooled cylinder head for a multi-cylinder internal combustion engine as claimed in claim 1,
characterised in that
the cylinder head screws (8) are completely surrounded by coolant water, at least along a part of their length.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19737492 | 1997-08-28 | ||
| DE19737492A DE19737492C1 (en) | 1997-08-28 | 1997-08-28 | Liquid cooled cylinder head for motor vehicle internal combustion engine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0899445A2 EP0899445A2 (en) | 1999-03-03 |
| EP0899445A3 EP0899445A3 (en) | 2000-01-12 |
| EP0899445B1 true EP0899445B1 (en) | 2003-02-26 |
Family
ID=7840435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98114792A Expired - Lifetime EP0899445B1 (en) | 1997-08-28 | 1998-08-06 | Liquid cooled cylinder head for a multi-cylinder internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6129064A (en) |
| EP (1) | EP0899445B1 (en) |
| DE (1) | DE19737492C1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009041708A1 (en) * | 2009-09-16 | 2011-03-24 | GM Global Technology Operations, Inc., Detroit | Screw pipe for cylinder head of internal combustion engine of vehicle, particularly motor vehicle, has area, where area is formed as truncated cone with base surface, cover surface and lateral area |
| CN103459814B (en) * | 2011-04-11 | 2015-12-09 | 丰田自动车株式会社 | The cylinder head of internal-combustion engine |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1220202B (en) * | 1964-05-08 | 1966-06-30 | Daimler Benz Ag | Arrangement of cylinder liners, in particular wet cylinder liners in internal combustion engines |
| DE1301655C2 (en) * | 1965-01-12 | 1970-04-23 | Daimler Benz Ag | Internal combustion engine with fluid-cooled cylinder liners |
| DE2143734B2 (en) * | 1971-09-01 | 1973-10-04 | Daimler-Benz Ag, 7000 Stuttgart | Internal combustion engine with an intermediate pipe inserted into the passage for the cooling water between the cylinder head and the crankcase |
| DE3228922A1 (en) * | 1982-08-03 | 1984-02-09 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Connection of preferably dynamically highly-stressed machine parts by means of a plurality of long bolts and a plurality of short bolts |
| JPS5996341A (en) * | 1982-11-22 | 1984-06-02 | 株式会社 中井（保）組 | Installation of cylinder in underground |
| JPS5996341U (en) * | 1982-12-20 | 1984-06-29 | マツダ株式会社 | Engine cylinder head structure |
| DE3513126C2 (en) * | 1985-04-12 | 1987-02-12 | Daimler-Benz Ag, 7000 Stuttgart | Liquid-cooled four-valve cylinder head for a multi-cylinder internal combustion engine |
| DE3545333A1 (en) * | 1985-12-20 | 1987-07-02 | Kloeckner Humboldt Deutz Ag | CYLINDER HEAD |
| DE3616629A1 (en) * | 1986-05-16 | 1987-11-19 | Audi Ag | INTERNAL COMBUSTION ENGINE |
| DE3726027A1 (en) * | 1987-08-05 | 1989-02-16 | Alcan Gmbh | HEAT-INPUTED COMPONENT |
| DE3836117C1 (en) * | 1988-10-22 | 1989-07-27 | Krupp Mak Maschinenbau Gmbh, 2300 Kiel, De | Cylinder head for internal combustion engines |
| DE3922885A1 (en) * | 1989-07-12 | 1991-01-17 | Man Nutzfahrzeuge Ag | CYLINDER HEAD GASKET FOR PISTON PISTON, IN PARTICULAR COMBUSTION ENGINES |
| DE4223780C2 (en) * | 1992-07-18 | 1996-04-11 | Bayerische Motoren Werke Ag | Screw connection for a cylinder head of an internal combustion engine |
| IT1270244B (en) * | 1993-07-23 | 1997-04-29 | Porsche Ag | SCREW COUPLING OF THE CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE |
| US5630389A (en) * | 1995-09-29 | 1997-05-20 | Self; Kevin G. | Cylinder head bolt plug |
| SE9503622L (en) * | 1995-10-13 | 1996-09-23 | Scania Cv Ab | Apparatus for sealing an internal combustion engine's combustion chamber |
| DE19644530C1 (en) * | 1996-10-26 | 1998-02-12 | Daimler Benz Ag | Cylinder head for multi-cylinder IC engine |
-
1997
- 1997-08-28 DE DE19737492A patent/DE19737492C1/en not_active Expired - Fee Related
-
1998
- 1998-08-06 EP EP98114792A patent/EP0899445B1/en not_active Expired - Lifetime
- 1998-08-28 US US09/143,626 patent/US6129064A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US6129064A (en) | 2000-10-10 |
| EP0899445A2 (en) | 1999-03-03 |
| DE19737492C1 (en) | 1998-10-29 |
| EP0899445A3 (en) | 2000-01-12 |
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