DE102007008281A1 - Reciprocating piston internal combustion engine i.e. diesel engine, has tie-rod connection engaging into inner thread such that pressure tensions are applied at material of cylinder crankcase in wall of ventilation opening - Google Patents
Reciprocating piston internal combustion engine i.e. diesel engine, has tie-rod connection engaging into inner thread such that pressure tensions are applied at material of cylinder crankcase in wall of ventilation opening Download PDFInfo
- Publication number
- DE102007008281A1 DE102007008281A1 DE200710008281 DE102007008281A DE102007008281A1 DE 102007008281 A1 DE102007008281 A1 DE 102007008281A1 DE 200710008281 DE200710008281 DE 200710008281 DE 102007008281 A DE102007008281 A DE 102007008281A DE 102007008281 A1 DE102007008281 A1 DE 102007008281A1
- Authority
- DE
- Germany
- Prior art keywords
- cylinder crankcase
- ventilation opening
- internal combustion
- combustion engine
- cylinder
- 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.)
- Withdrawn
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
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0043—Arrangements of mechanical drive elements
- F02F7/0053—Crankshaft bearings fitted in the crankcase
-
- 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
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0021—Construction
- F02F2007/0041—Fixing Bolts
Abstract
Description
Die Erfindung betrifft eine Hubkolbenbrennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The The invention relates to a reciprocating internal combustion engine according to the preamble of claim 1.
Hubkolbenbrennkraftmaschinen mit mehreren Zylinderbohrungen sind seit langem in den unterschiedlichsten Ausführungsformen bekannt. Überwiegend ist der Motorblock derselben in mehreren Ebenen geteilt ausgebildet und weist zumindest einen Zylinderkopf, ein Zylinderkurbelgehäuse und einen Hauptlagerdeckel für das Kurbelwellenlager auf. Die einzelnen Motorblockkomponenten sind untereinander mittels einer Mehrzahl Verschraubungen fest verbindbar.reciprocating internal combustion engines with multiple cylinder bores have long been in the most diverse Embodiments known. Mostly is the Engine block of the same divided in several levels and formed has at least one cylinder head, a cylinder crankcase and a main bearing cap for the crankshaft bearing. The individual engine block components are interconnected by means of a Multiple screw connections firmly connectable.
Aus
der
Die
Ferner
ist aus der
Schließlich
ist es seit geraumer Zeit bekannt, sogenannte Ventilationsöffnungen
vorzusehen, die ihrerseits zwischen den Zylinderbohrungen in den Querwänden
des Zylinderkurbelgehäuses vorzugsweise unterhalb der Kolbenringumkehrpunkte
angeordnet sind und einer Luftzirkulation zwischen den Zylinderbohrungen
dienen (
In der Praxis wurde jedoch festgestellt, dass die Dauerfestigkeit des Zylinderkurbelgehäuses im Bereich der Ventilationsöffnung durch die dort entstehenden Zugspannungen infolge der im Motorbetrieb entstehenden Zündkräfte insbesondere auch bei Dieselmotoren-Anwendungen bei weitem noch nicht ausreichend ist.In In practice, however, it has been found that the fatigue strength of the Cylinder crankcase in the area of the ventilation opening by the resulting tensile stresses as a result of the engine operating Ignition forces especially in diesel engine applications far from being sufficient.
Zwar besteht die Möglichkeit, diesem Problem durch an sich bekannte geeignete Gusseisenwerkstoffe mit entsprechenden Eigenschaften, insbesondere erhöhten Zugfestigkeiten, zu begegnen, jedoch gehen derartige Maßnahmen regelmäßig mit erhöhten Kosten einher.Though there is the possibility of this problem by known per se suitable cast iron materials with corresponding properties, especially increased tensile strength, counter, however such measures go regularly associated with increased costs.
Hiervon ausgehend ist es demgemäß Aufgabe der Erfindung, eine Hubkolbenbrennkraftmaschine zu schaffen, welche trotz Verwendung eines kostengünstigen Gusseisenwerkstoffes für das Zylinderkurbelgehäuse dennoch erhöhten Zugspannungen insbesondere im Bereich der Ventilationsöffnung infolge der im Motorbetrieb entstehenden Zündkräfte stand hält.Of these, It is accordingly an object of the invention, to provide a reciprocating internal combustion engine, which despite use a cost-effective cast iron material for the cylinder crankcase still increased tensile stresses in particular in the area of the ventilation opening as a result of engine operation resulting ignition forces withstood.
Ausgehend von einer Hubkolbenbrennkraftmaschine mit zumindest einem Zylinderkopf, einem Zylinderkurbelgehäuse und einem Hauptlagerdeckel sowie mit mehreren Zylinderbohrungen wobei zumindest in einer Querwand des Zylinderkurbelgehäuses zwischen benachbarten Zylinderbohrungen wenigstens eine, besagte benachbarte Zylinderbohrungen verbindende Ventilationsöffnung vorgesehen ist, und wobei der Hauptlagerdeckel innerhalb jeder Querwand mittels einer Mehrzahl Verschraubungen am Zylinderkurbelgehäuse festgelegt ist, wird die gestellte Aufgabe nunmehr dadurch gelöst, dass der Hauptlagerdeckel beidseitig der Mittenlängsebene „ML" der Hubkolbenbrennkraftmaschine mittels je einer in Bezug auf die Mittenlängsebene „ML" der Hubkolbenbrennkraftmaschine innenliegenden kurzen Lagerdeckel-Verschraubung und je einer außenliegenden langen Zuganker-Verschraubung am Zylinderkurbelgehäuse festgelegt ist und die außenliegenden langen Zuganker-Verschraubungen jeweils derart in ein endseitig eines unmittelbar neben der Ventilationsöffnung verlaufenden Sackloches des Zylinderkurbelgehäuses angeordnetes Innengewinde eingreifen, dass im Bereich der Ventilationsöffnung gezielt Druckspannungen in das Material des Zylinderkurbelgehäuses respektive in die Wandung der Ventilationsöffnung einbringbar sind.outgoing from a reciprocating internal combustion engine with at least one cylinder head, a cylinder crankcase and a main bearing cap as well with several cylinder bores being at least in a transverse wall the cylinder crankcase between adjacent cylinder bores at least one, said adjacent cylinder bores connecting Ventilation opening is provided, and wherein the main bearing cap within each transverse wall by means of a plurality of screw connections is set on the cylinder crankcase, the asked Task now solved in that the main bearing cap on both sides of the center longitudinal plane "ML" of the reciprocating internal combustion engine by means of one each with respect to the center longitudinal plane "ML" the reciprocating internal combustion engine internal short bearing cap screwing and one outer long tie rod gland is fixed to the cylinder crankcase and the outside long tie rods screwed respectively in such an end one immediately adjacent to the ventilation opening Blind hole of the cylinder crankcase arranged internal thread intervene that targeted compressive stresses in the area of the ventilation opening in the material of the cylinder crankcase respectively in the wall of the ventilation opening can be introduced.
Durch die gezielte Einbringung von Druckspannungen gerade in den kritischen Bereich der Ventilationsöffnung kann besonders vorteilhaft zu starken Zündkräften bzw. den daraus resultierenden Zugspannungen wirkungsvoll und nachhaltig begegnet werden.Through the targeted introduction of pressure voltages particularly in the critical region of the ventilation opening can be counteracted particularly effectively to strong ignition forces or the resulting tensile stresses effectively and sustainably.
In vorteilhafter Weiterbildung der Erfindung ist das Innengewinde des Sackloches unmittelbar oberhalb der Ventilationsöffnung beginnend angeordnet. Eine derartige Hubkolbenbrennkraftmaschine bietet sich besonders zur Verwendung als Dieselmotor an, wobei das Zylinderkurbelgehäuse besonders vorteilhaft aus einem kostengünstigen Gusseisenwerkstoff mit minimierter Zugfestigkeit von etwa 250 N/mm2 bestehen kann.In an advantageous embodiment of the invention, the internal thread of the blind hole is arranged immediately above the ventilation opening starting. Such a reciprocating internal combustion engine is particularly suitable for use as a diesel engine, wherein the cylinder crankcase can be particularly advantageously made of a cost-effective cast iron material with minimized tensile strength of about 250 N / mm 2 .
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispieles näher erläutert. Die einzige Figur zeigt das Zylinderkurbelgehäuse einer Hubkolbenbrennkraftmaschine mit einem daran angeschlossenen und mit demselben fest verbundenen Hauptlagerdeckel im Querschnitt.The Invention will be described below with reference to an embodiment explained in more detail. The only figure shows the cylinder crankcase a reciprocating internal combustion engine with a connected thereto and with the same fixed main bearing cap in cross section.
Wie
bereits oben dargetan, umfasst gemäß der einzigen
Figur eine Hubkolbenbrennkraftmaschine zumindest einen hier nicht
näher gezeigten, jedoch an sich bekannten Zylinderkopf,
das Zylinderkurbelgehäuse
Ferner
sind zwei zueinander benachbarte Zylinderbohrungen
Zur
Verschraubung des Hauptlagerdeckels
Wie
der einzigen Figur weiter zu entnehmen ist, sind in besagter gemeinsamer
Querebene der Lagerdeckel-Verschraubungen
Diese
Zuganker-Verschraubungen
Vorliegend
ist das Innengewinde
Durch
vorstehende Maßnahme kann nunmehr trotz erhöhter
Zündkräfte infolge Spitzenzünddrücken
von ca. 200 bar, wie sie insbesondere bei Dieselanwendungen zu verzeichnen
sind, und daraus resultierender erhöhter Zugspannungen
im Material des Zylinderkurbelgehäuses
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 19604547 A1 [0003] - DE 19604547 A1 [0003]
- - DE 19608018 A1 [0004] - DE 19608018 A1 [0004]
- - EP 0240120 A2 [0005] - EP 0240120 A2 [0005]
- - DE 3727670 A1 [0006] - DE 3727670 A1 [0006]
- - DE 10340157 A1 [0006] - DE 10340157 A1 [0006]
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710008281 DE102007008281A1 (en) | 2007-02-20 | 2007-02-20 | Reciprocating piston internal combustion engine i.e. diesel engine, has tie-rod connection engaging into inner thread such that pressure tensions are applied at material of cylinder crankcase in wall of ventilation opening |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710008281 DE102007008281A1 (en) | 2007-02-20 | 2007-02-20 | Reciprocating piston internal combustion engine i.e. diesel engine, has tie-rod connection engaging into inner thread such that pressure tensions are applied at material of cylinder crankcase in wall of ventilation opening |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007008281A1 true DE102007008281A1 (en) | 2008-08-21 |
Family
ID=39628166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200710008281 Withdrawn DE102007008281A1 (en) | 2007-02-20 | 2007-02-20 | Reciprocating piston internal combustion engine i.e. diesel engine, has tie-rod connection engaging into inner thread such that pressure tensions are applied at material of cylinder crankcase in wall of ventilation opening |
Country Status (1)
Country | Link |
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DE (1) | DE102007008281A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014222735A1 (en) | 2014-11-06 | 2016-05-12 | Volkswagen Aktiengesellschaft | Cylinder block for an internal combustion engine and method for producing a cylinder block |
DE102014016355A1 (en) | 2014-11-05 | 2016-05-12 | Daimler Ag | Cylinder crankcase for a reciprocating internal combustion engine, in particular with at least one variably adjustable compression ratio |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3026041A1 (en) * | 1979-08-28 | 1981-03-12 | List, Hans, Prof. Dipl.-Ing. Dr.Dr.h.c., Graz | MULTI-CYLINDER WATER COOLED INTERNAL COMBUSTION ENGINE |
DE3109948A1 (en) * | 1981-03-14 | 1982-09-23 | Volkswagenwerk Ag, 3180 Wolfsburg | Internal combustion engine, especially for a motor vehicle |
EP0240120A2 (en) | 1986-03-15 | 1987-10-07 | Austin Rover Group Limited | Internal combustion engine |
DE3436872C2 (en) * | 1983-10-07 | 1988-06-16 | Honda Giken Kogyo K.K., Tokio/Tokyo, Jp | |
DE3727670A1 (en) | 1987-08-19 | 1989-03-02 | Daimler Benz Ag | Housing block for reciprocating piston internal combustion engine |
DE19604547A1 (en) | 1995-02-17 | 1996-08-22 | Volkswagen Ag | Piston-engine housing construction |
DE19608018A1 (en) | 1995-03-10 | 1996-09-12 | Volkswagen Ag | Housing construction for piston-engine |
DE19628110C1 (en) * | 1996-07-12 | 1997-10-02 | Daimler Benz Ag | Crankcase for reciprocating internal combustion engine |
AT2109U1 (en) * | 1997-04-24 | 1998-04-27 | Avl List Gmbh | INTERNAL COMBUSTION ENGINE WITH A CRANKCASE |
DE10339573A1 (en) * | 2003-08-28 | 2005-03-31 | Audi Ag | Combined cylinder block and upper part of crankcase is for internal combustion engine and has solid connecting pieces between cylinder bores at top and cooling channels extending all round bores lower down |
DE10340157A1 (en) | 2003-09-01 | 2005-03-31 | Audi Ag | Device for media guidance in a cylinder crankcase |
-
2007
- 2007-02-20 DE DE200710008281 patent/DE102007008281A1/en not_active Withdrawn
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3026041A1 (en) * | 1979-08-28 | 1981-03-12 | List, Hans, Prof. Dipl.-Ing. Dr.Dr.h.c., Graz | MULTI-CYLINDER WATER COOLED INTERNAL COMBUSTION ENGINE |
DE3109948A1 (en) * | 1981-03-14 | 1982-09-23 | Volkswagenwerk Ag, 3180 Wolfsburg | Internal combustion engine, especially for a motor vehicle |
DE3436872C2 (en) * | 1983-10-07 | 1988-06-16 | Honda Giken Kogyo K.K., Tokio/Tokyo, Jp | |
EP0240120A2 (en) | 1986-03-15 | 1987-10-07 | Austin Rover Group Limited | Internal combustion engine |
DE3727670A1 (en) | 1987-08-19 | 1989-03-02 | Daimler Benz Ag | Housing block for reciprocating piston internal combustion engine |
DE19604547A1 (en) | 1995-02-17 | 1996-08-22 | Volkswagen Ag | Piston-engine housing construction |
DE19608018A1 (en) | 1995-03-10 | 1996-09-12 | Volkswagen Ag | Housing construction for piston-engine |
DE19628110C1 (en) * | 1996-07-12 | 1997-10-02 | Daimler Benz Ag | Crankcase for reciprocating internal combustion engine |
AT2109U1 (en) * | 1997-04-24 | 1998-04-27 | Avl List Gmbh | INTERNAL COMBUSTION ENGINE WITH A CRANKCASE |
DE10339573A1 (en) * | 2003-08-28 | 2005-03-31 | Audi Ag | Combined cylinder block and upper part of crankcase is for internal combustion engine and has solid connecting pieces between cylinder bores at top and cooling channels extending all round bores lower down |
DE10340157A1 (en) | 2003-09-01 | 2005-03-31 | Audi Ag | Device for media guidance in a cylinder crankcase |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014016355A1 (en) | 2014-11-05 | 2016-05-12 | Daimler Ag | Cylinder crankcase for a reciprocating internal combustion engine, in particular with at least one variably adjustable compression ratio |
DE102014222735A1 (en) | 2014-11-06 | 2016-05-12 | Volkswagen Aktiengesellschaft | Cylinder block for an internal combustion engine and method for producing a cylinder block |
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Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
R012 | Request for examination validly filed |
Effective date: 20131116 |
|
R016 | Response to examination communication | ||
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |