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EP1311752B1 - Crankcase for an internal combustion engine, especially for a boxer engine - Google Patents

Crankcase for an internal combustion engine, especially for a boxer engine Download PDF

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Publication number
EP1311752B1
EP1311752B1 EP01947416A EP01947416A EP1311752B1 EP 1311752 B1 EP1311752 B1 EP 1311752B1 EP 01947416 A EP01947416 A EP 01947416A EP 01947416 A EP01947416 A EP 01947416A EP 1311752 B1 EP1311752 B1 EP 1311752B1
Authority
EP
European Patent Office
Prior art keywords
crankcase
bearing
cylinder
halves
engine
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
Application number
EP01947416A
Other languages
German (de)
French (fr)
Other versions
EP1311752A1 (en
Inventor
Matthias Penzel
Christian Schwarzl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1311752A1 publication Critical patent/EP1311752A1/en
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Publication of EP1311752B1 publication Critical patent/EP1311752B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/24—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
    • F02B75/243—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type with only one crankshaft of the "boxer" type, e.g. all connecting rods attached to separate crankshaft bearings
    • 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
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1824—Number of cylinders six

Definitions

  • the invention relates to a crankcase for a boxer engine according to the preamble of patent claim 1.
  • From the DE 40 01 514 A1 is a two-part crankcase for a boxer engine known, the two halves are bolted together in the area of the integrated crankshaft bearing blocks in the crankcase. Since the bearing blocks with the bearing bores for receiving the crankshaft extend at the height of the cylinder bores, as shown in the drawing of the DE 40 01 514 A1 it can be seen that the holes for receiving the bearing screws are mounted at a corresponding distance from the circumference of the cylinder bore. This creates between the bearing bore for the crankshaft and the holes for the attachment of the two crankcase halves a corresponding distance that may result in an undesirable gapping of the storage chairs during operation of the internal combustion engine.
  • the JP 10-259757 A discloses a housing structure for an in-line engine, in which the screwing of the two crankcase halves obliquely, ie at an angle with respect to the center axis of the cylinder bores in the crankcase half takes place.
  • a housing for an internal combustion engine in a series, V or boxer form which has as a basic element a crankcase half with an oblique dividing plane, ie that the dividing plane is arranged at an angle with respect to the central axis of the cylinder bores.
  • the various types can be easily derived: in-line engine (supplement with a cover as the second crankcase half) or V- or boxer engine (combination of two basic elements).
  • the two crankcase halves are bolted to each other at the edge.
  • the invention is therefore based on the object to carry out the screw connection of the two crankcase halves so that the bearing screws can be brought close to the bearing bore for receiving the crank pin.
  • the holes for the Lagerlaubverschraubung can be brought closer to the bearing bore.
  • the dividing plane of the two crankcase halves runs at substantially the same angle below the longitudinal axis of the bearing screws to the central axis the cylinder bores is aligned.
  • the longitudinal axis of the bearing screws extends substantially perpendicular to the parting plane of the two crankcase halves, so that advantageously no transverse forces occur in the inventive screwing.
  • crankcase for a 6-cylinder boxer engine is without limitation to this embodiment of two crankcase halves 10 and 12 with two cylinder banks 11 and 13 in which the cylinder bores 14 and 16 are arranged.
  • Each of the two crankcase halves 10 and 12 have a plurality of bearing portions arranged behind each other 18, hereinafter referred to as bearing blocks, in each of which one half of a bearing bore 24 is formed for a crankshaft, not shown, wherein the bearing bores 24 in the assembled state each have a crank pin Record crankshaft.
  • the screwing of the Bearing 18 takes place via two bearing screws 26, 28, with which at the same time the two crankcase halves 10 and 12 are screwed. As can be seen from FIG.
  • the dividing plane 30 of the two crankcase halves 10 and 12 extends at an angle ⁇ , which is approximately 12 ° in the present case, relative to a line 32 extending essentially perpendicular to the cylinder longitudinal axis 34.
  • the longitudinal axes 36 of the bearing screws 26, 28 in turn extend relative to the cylinder longitudinal axis 34 at an angle ⁇ ', which substantially corresponds to the angle ⁇ of the inclined dividing plane of the two crankcase halves 10 and 12.
  • the holes 37 can be brought closer to the Lagerbohronne 24 for the Lagerlaubverschraubung.
  • the gas and inertial forces exerted on the crankshaft during combustion can be securely received, and gapping of the bearing blocks 18, particularly in the area adjacent to the bearing bore 24, is prevented.
  • the longitudinal axes 36 of the bearing screws 26, 28 run at right angles to the graduation plane 30 of the two crankcase halves 10 and 12, no transverse forces arise during the screwing which would otherwise have to be absorbed by additional form-fitting connections.
  • the screw heads 38 and 40 of the opposing and mutually parallel bearing screws 26 and 28 are supported on an outer screw surface 42 and 44 of the crankcase halves 10 and 12, wherein the screw surfaces 42, 44 approximately at the level of the lower end of the cylinder bores fourteenth , 16 are arranged.
  • the bearing screws 26, the screw heads 38 are supported on the screw 44 of the crankcase half 12 are screwed in the other crankcase half 14 in a threaded blind hole.
  • the bearing screws 28, the screw heads 40 are supported on the outer screw surface 42 of the crankcase half 14 in the opposite crankcase half 12 in one with a thread screwed blind hole provided.
  • seven storage chairs 18 are provided for the 6-cylinder boxer engine.
  • the recesses 46, 48 belong to the crank chamber, the openings 50 are water-bearing channels, which are supplied via corresponding connections 52 with cooling water.
  • the arranged relative to the mounting position of the boxer engine below the bearing bore 24 opening 54 serves to receive an intermediate shaft, not shown, for driving the arranged in the cylinder head camshafts.
  • a channel 56 which leads to a bearing block 18, serves to supply the lubricating oil to the crankshaft, with bearing shells 58, likewise known from the prior art, being arranged in the individual bearing blocks 18.
  • a outgoing from the bearing bore 24 and the cylinder bore 14 leading channel 60 is used for a spray oil cooling for the piston.
  • an oil filter 62 is screwed to the crankcase, which serves to clean the lubricating oil.

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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 betrifft ein Kurbelgehäuse für einen Boxermotor nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a crankcase for a boxer engine according to the preamble of patent claim 1.

Aus der DE 40 01 514 A1 ist ein zweigeteiltes Kurbelgehäuse für einen Boxermotor bekannt, deren beiden Hälften im Bereich der im Kurbelgehäuse integrierten Lagerstühle für die Kurbelwelle miteinander verschraubt sind. Da sich die Lagerstühle mit den Lagerbohrungen für die Aufnahme der Kurbelwelle auf der Höhe der Zylinderbohrungen erstrecken, müssen, wie aus der Zeichnung der DE 40 01 514 A1 ersichtlich, die Bohrungen für die Aufnahme der Lagerschrauben in einem entsprechenden Abstand vom Umfang der Zylinderbohrung angebracht werden. Damit entsteht zwischen der Lagerbohrung für die Kurbelwelle und den Bohrungen für die Befestigung der beiden Kurbelgehäusehälften ein entsprechender Abstand, der unter Umständen während des Betriebs der Brennkraftmaschine zu einem unerwünschten Klaffen der Lagerstühle führt.From the DE 40 01 514 A1 is a two-part crankcase for a boxer engine known, the two halves are bolted together in the area of the integrated crankshaft bearing blocks in the crankcase. Since the bearing blocks with the bearing bores for receiving the crankshaft extend at the height of the cylinder bores, as shown in the drawing of the DE 40 01 514 A1 it can be seen that the holes for receiving the bearing screws are mounted at a corresponding distance from the circumference of the cylinder bore. This creates between the bearing bore for the crankshaft and the holes for the attachment of the two crankcase halves a corresponding distance that may result in an undesirable gapping of the storage chairs during operation of the internal combustion engine.

Die JP 10-259757 A offenbart eine Gehäusestruktur für einen Reihenmotor, bei dem die Verschraubung der beiden Kurbelgehäusehälften schräg, d.h. unter einem Winkel in Bezug auf die Mittelachse der Zylinderbohrungen in der einen Kurbelgehäusehälfte, erfolgt.The JP 10-259757 A discloses a housing structure for an in-line engine, in which the screwing of the two crankcase halves obliquely, ie at an angle with respect to the center axis of the cylinder bores in the crankcase half takes place.

Aus der GB 851616 ist ein Gehäuse für eine Verbrennungskraftmaschine in Reihen-, V- oder Boxer-Form bekannt geworden, das als Grundelement eine Kurbelgehäusehälfte mit schräger Teilungsebene aufweist, d.h. dass die Teilungsebene unter einem Winkel in Bezug auf die Mittelachse der Zylinderbohrungen angeordnet ist. Aus diesem Grundelement lassen sich die verschiedenen Bauformen einfach herleiten: Reihenmotor (Ergänzung mit einem Deckel als zweite Kurbelgehäusehälfte) oder V- bzw. Boxermotor (Kombination zweier Grundelemente). Die beiden Kurbelgehäusehälften werden dabei jeweils randseitig miteinander verschraubt.From the GB 851616 For example, a housing for an internal combustion engine in a series, V or boxer form has become known which has as a basic element a crankcase half with an oblique dividing plane, ie that the dividing plane is arranged at an angle with respect to the central axis of the cylinder bores. From this basic element, the various types can be easily derived: in-line engine (supplement with a cover as the second crankcase half) or V- or boxer engine (combination of two basic elements). The two crankcase halves are bolted to each other at the edge.

Der Erfindung liegt daher die Aufgabe zugrunde, die Verschraubung der beiden Kurbelgehäusehälften so auszuführen, dass die Lagerschrauben dicht an die Lagerbohrung für die Aufnahme der Kurbelzapfen herangeführt werden können.The invention is therefore based on the object to carry out the screw connection of the two crankcase halves so that the bearing screws can be brought close to the bearing bore for receiving the crank pin.

Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved with the features of claim 1.

Dadurch, dass die Verschraubung der beiden Kurbelgehäusehälften schräg, d.h. unter einem Winkel in Bezug auf die Mittelachse der Zylinderbohrung erfolgt, können die Bohrungen für die Lagerstuhlverschraubung dichter an die Lagerbohrung herangeführt werden. Damit die bei einer Schrägverschraubung auftretenden Querkräfte eliminiert werden, verläuft die Teilungsebene der beiden Kurbelgehäusehälften im wesentlichen unter dem selben Winkel unter dem die Längsachse der Lagerschrauben zur Mittelachse der Zylinderbohrungen ausgerichtet ist. Mit anderen Worten, die Längsachse der Lagerschrauben verläuft im wesentlichen rechtwinklig zur Teilungsebene der beiden Kurbelgehäusehälften, so dass bei der erfindungsgemäßen Verschraubung in vorteilhafter Weise keine Querkräfte auftreten.Characterized in that the screw connection of the two crankcase halves obliquely, that is, at an angle with respect to the center axis of the cylinder bore, the holes for the Lagerstuhlverschraubung can be brought closer to the bearing bore. In order to eliminate the transverse forces occurring in a helical gland, the dividing plane of the two crankcase halves runs at substantially the same angle below the longitudinal axis of the bearing screws to the central axis the cylinder bores is aligned. In other words, the longitudinal axis of the bearing screws extends substantially perpendicular to the parting plane of the two crankcase halves, so that advantageously no transverse forces occur in the inventive screwing.

Weitere Vorteile und vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der Beschreibung.Further advantages and advantageous developments of the invention will become apparent from the dependent claims and the description.

Ein Ausführungsbeispiel der Erfindung ist in der nachfolgenden Beschreibung und Zeichnung erläutert.An embodiment of the invention is explained in the following description and drawings.

Letztere zeigt:

Fig. 1
eine schematische Gesamtansicht des Kurbelgehäuses einer Brennkraftmaschine,
Fig. 2
eine Draufsicht auf das Kurbelgehäuse in Richtung des Pfeiles A in Fig. 1,
Fig. 3
eine Schnittdarstellung entlang der Linie II - II in Fig. 2 und
Fig. 4
eine Perspektivansicht einer Kurbelgehäusehälfte.
The latter shows:
Fig. 1
a schematic overall view of the crankcase of an internal combustion engine,
Fig. 2
a plan view of the crankcase in the direction of arrow A in Fig. 1,
Fig. 3
a sectional view taken along the line II - II in Fig. 2 and
Fig. 4
a perspective view of a crankcase half.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Das in der Zeichnung dargestellte Kurbelgehäuse für einen 6 -Zylinder-Boxermotor besteht ohne Einschränkung auf diese Ausführungsform aus zwei Kurbelgehäusehälften 10 und 12 mit zwei Zylinderbänken 11 und 13 in denen die Zylinderbohrungen 14 und 16 angeordnet sind. Jede der beiden Kurbelgehäusehälften 10 und 12 weisen mehrere hinter einander angeordnete Lagerabschnitte 18 auf, im folgenden als Lagerstühle bezeichnet, in denen jeweils eine Hälfte einer Lagerbohrung 24 für eine nicht dargestellte Kurbelwelle ausgebildet ist, wobei die Lagerbohrungen 24 im zusammen gebauten Zustand jeweils einen Kurbelzapfen der Kurbelwelle aufnehmen. Die Verschraubung der Lagerstühle 18 erfolgt über jeweils zwei Lagerschrauben 26, 28, mit denen gleichzeitig die beiden Kurbelgehäusehälften 10 und 12 verschraubt werden. Wie aus Fig. 3 ersichtlich, verläuft die Teilungsebene 30 der beiden Kurbelgehäusehälften 10 und 12 bezogen auf eine im wesentlichen senkrecht zur Zylinderlängsachse 34 verlaufende Linie 32 unter einem Winkel α, der im vorliegenden Fall ca. 12° beträgt.
Die Längsachsen 36 der Lagerschrauben 26, 28 wiederum verlaufen bezogen auf die Zylinderlängsachse 34 unter einem Winkel α', der im wesentlichen dem Winkel α der schräg verlaufenden Teilungsebene der beiden Kurbelgehäusehälften 10 und 12 entspricht.The illustrated in the drawing crankcase for a 6-cylinder boxer engine is without limitation to this embodiment of two crankcase halves 10 and 12 with two cylinder banks 11 and 13 in which the cylinder bores 14 and 16 are arranged. Each of the two crankcase halves 10 and 12 have a plurality of bearing portions arranged behind each other 18, hereinafter referred to as bearing blocks, in each of which one half of a bearing bore 24 is formed for a crankshaft, not shown, wherein the bearing bores 24 in the assembled state each have a crank pin Record crankshaft. The screwing of the Bearing 18 takes place via two bearing screws 26, 28, with which at the same time the two crankcase halves 10 and 12 are screwed. As can be seen from FIG. 3, the dividing plane 30 of the two crankcase halves 10 and 12 extends at an angle α, which is approximately 12 ° in the present case, relative to a line 32 extending essentially perpendicular to the cylinder longitudinal axis 34.
The longitudinal axes 36 of the bearing screws 26, 28 in turn extend relative to the cylinder longitudinal axis 34 at an angle α ', which substantially corresponds to the angle α of the inclined dividing plane of the two crankcase halves 10 and 12.

Dadurch, dass die Lagerschrauben 26, 28 bezogen auf die Zylinderlängsachse 34 schräg angeordnet sind, können die Bohrungen 37 für die Lagerstuhlverschraubung dichter an die Lagerbohrungen 24 herangeführt werden. Damit können die bei der Verbrennung auf die Kurbelwelle ausgeübten Gas- und Massenkräfte sicher aufgenommen werden und ein Klaffen der Lagerstühle 18, insbesondere im an die Lagerbohrung 24 angrenzenden Bereich, wird verhindert. Dadurch, dass die Längsachsen 36 der Lagerschrauben 26, 28 im rechten Winkel zur Teilungsebene 30 der beiden Kurbelgehäusehälften 10 und 12 verlaufen, entstehen bei der Verschraubung keine Querkräfte, die ansonsten durch zusätzliche formschlüssige Verbindungen aufgefangen werden müssten. Die Schraubenköpfe 38 und 40 der sich gegenüber liegenden und parallel zueinander angeordneten Lagerschrauben 26 und 28 stützen sich an einer äußeren Schraubfläche 42 und 44 der Kurbelgehäusehälften 10 und 12 ab, wobei die Schraubflächen 42, 44 in etwa auf der Höhe des unteren Endes der Zylinderbohrungen 14, 16 angeordnet sind. Die Lagerschrauben 26, deren Schraubenköpfe 38 sich an der Schraubfläche 44 der Kurbelgehäusehälfte 12 abstützen sind in der anderen Kurbelgehäusehälfte 14 in einer mit einem Gewinde versehenen Sacklochbohrung verschraubt. Analog dazu, sind die Lagerschrauben 28, deren Schraubenköpfe 40 sich an der äußeren Schraubfläche 42 der Kurbelgehäusehälfte 14 abstützen in der gegenüberliegenden Kurbelgehäusehälfte 12 in einer mit einem Gewinde versehenen Sacklochbohrung verschraubt. Im vorliegenden Ausführungsbeispiel sind für den 6-Zylinder-Boxermotor sieben Lagerstühle 18 vorgesehen.Characterized in that the bearing screws 26, 28 are arranged obliquely relative to the cylinder longitudinal axis 34, the holes 37 can be brought closer to the Lagerbohrungen 24 for the Lagerstuhlverschraubung. Thus, the gas and inertial forces exerted on the crankshaft during combustion can be securely received, and gapping of the bearing blocks 18, particularly in the area adjacent to the bearing bore 24, is prevented. Due to the fact that the longitudinal axes 36 of the bearing screws 26, 28 run at right angles to the graduation plane 30 of the two crankcase halves 10 and 12, no transverse forces arise during the screwing which would otherwise have to be absorbed by additional form-fitting connections. The screw heads 38 and 40 of the opposing and mutually parallel bearing screws 26 and 28 are supported on an outer screw surface 42 and 44 of the crankcase halves 10 and 12, wherein the screw surfaces 42, 44 approximately at the level of the lower end of the cylinder bores fourteenth , 16 are arranged. The bearing screws 26, the screw heads 38 are supported on the screw 44 of the crankcase half 12 are screwed in the other crankcase half 14 in a threaded blind hole. Similarly, the bearing screws 28, the screw heads 40 are supported on the outer screw surface 42 of the crankcase half 14 in the opposite crankcase half 12 in one with a thread screwed blind hole provided. In the present embodiment, seven storage chairs 18 are provided for the 6-cylinder boxer engine.

Weitere in der Zeichnung dargestellte Bauteile stellen folgendes dar:
Die Aussparungen 46, 48 gehören zum Kurbelraum, die Öffnungen 50 sind wasserführende Kanäle, die über entsprechende Anschlüsse 52 mit Kühlwasser versorgt werden. Die bezogen auf die Einbaulage des Boxermotors unterhalb der Lagerbohrung 24 angeordnete Öffnung 54 dient der Aufnahme einer nicht dargestellten Zwischenwelle für den Antrieb der im Zylinderkopf angeordneten Nockenwellen. Ein Kanal 56, der zu einem Lagerstuhl 18 führt, dient zur Schmierölversorgung der Kurbelwelle, wobei in den einzelnen Lagerstühlen 18 ebenfalls aus dem Stand der Technik bekannte Lagerschalen 58 angeordnet sind. Ein von der Lagerbohrung 24 ausgehender und zur Zylinderbohrung 14 führender Kanal 60 dient einer nicht näher dargestellten Spritzölkühlung für die Kolben. Wie allgemein üblich, ist an das Kurbelgehäuse ein Ölfilter 62 angeschraubt, der zur Reinigung des Schmieröls dient.Further components shown in the drawing represent the following:
The recesses 46, 48 belong to the crank chamber, the openings 50 are water-bearing channels, which are supplied via corresponding connections 52 with cooling water. The arranged relative to the mounting position of the boxer engine below the bearing bore 24 opening 54 serves to receive an intermediate shaft, not shown, for driving the arranged in the cylinder head camshafts. A channel 56, which leads to a bearing block 18, serves to supply the lubricating oil to the crankshaft, with bearing shells 58, likewise known from the prior art, being arranged in the individual bearing blocks 18. A outgoing from the bearing bore 24 and the cylinder bore 14 leading channel 60 is used for a spray oil cooling for the piston. As is common practice, an oil filter 62 is screwed to the crankcase, which serves to clean the lubricating oil.

Claims (3)

  1. A crankcase for a water-cooled horizontally opposed engine, with
    - two crankcase halves (10, 12) in which bearing portions (18) with bearing bores (24) for the crankshaft journals of a crankshaft are arranged, wherein
    - the two crankcase halves (10, 12) are screwed together in the region of the bearing bores (24), and with cylinder bores (14, 16) for receiving the pistons, and wherein
    - a cylinder longitudinal axis (34) extends perpendicularly to a vertical axis (A) of the opposed-cylinder engine,
    - characterised in that
    - a dividing plane (30) of the two crankcase halves (10, 12) extends at an angle α other than zero in relation to a line (32) extending perpendicularly to the cylinder longitudinal axis (34), and in that
    - the longitudinal axis (36) of the bearing bolts (26, 28) extends substantially at right angles to the dividing plane (30) so that
    - the bearing bolts (26, 28) extend closely to the bearing bore (24).
  2. A crankcase according to claim 1, characterised in that the bearing bolts (26, 28) are supported against an outer bolt surface (42, 44) of the crankcase (10, 12) and are therefore accessible from outside.
  3. A crankcase according to claim 1 or 2, characterised in that the cylinder banks integrated into the two crankcase halves (10, 12) are arranged so as to lie at an angle of 180° to one another, and in that the crankcase halves (10, 12) are screwed together at the level of the lower end of the cylinder bores (14, 16).
EP01947416A 2000-08-18 2001-06-28 Crankcase for an internal combustion engine, especially for a boxer engine Expired - Lifetime EP1311752B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10040475A DE10040475C1 (en) 2000-08-18 2000-08-18 Crankcase for an internal combustion engine, in particular for a boxer engine
DE10040475 2000-08-18
PCT/EP2001/007380 WO2002016747A1 (en) 2000-08-18 2001-06-28 Crankcase for an internal combustion engine, especially for a boxer engine

Publications (2)

Publication Number Publication Date
EP1311752A1 EP1311752A1 (en) 2003-05-21
EP1311752B1 true EP1311752B1 (en) 2007-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01947416A Expired - Lifetime EP1311752B1 (en) 2000-08-18 2001-06-28 Crankcase for an internal combustion engine, especially for a boxer engine

Country Status (5)

Country Link
US (1) US6766781B2 (en)
EP (1) EP1311752B1 (en)
JP (1) JP2004507644A (en)
DE (2) DE10040475C1 (en)
WO (1) WO2002016747A1 (en)

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EP1709309A4 (en) * 2004-01-02 2012-06-20 Darrell Grayson Higgins Slide body internal combustion engine
US8057521B2 (en) * 2005-06-03 2011-11-15 Southern Spine, Llc Surgical stabilization system
US8668725B2 (en) 2007-07-13 2014-03-11 Southern Spine, Llc Bone screw
DE102015001985A1 (en) 2015-02-14 2016-08-18 Benjamin-Elias Probst Double chamber five-stroke engine Sutur X
JP6751318B2 (en) * 2016-08-04 2020-09-02 株式会社Ｓｕｂａｒｕ Horizontally opposed engine
CN108708798B (en) * 2018-05-16 2023-10-31 芜湖钻石航空发动机有限公司 Horizontally opposed engine cylinder block

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GB851616A (en) * 1958-01-31 1960-10-19 Ruston & Hornsby Ltd Internal combustion engine crankcase
JPH10259757A (en) * 1997-03-17 1998-09-29 Yamaha Motor Co Ltd Casing structure of engine

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DE10040475C1 (en) 2001-08-30
DE50113200D1 (en) 2007-12-13
WO2002016747A1 (en) 2002-02-28
EP1311752A1 (en) 2003-05-21
US6766781B2 (en) 2004-07-27
US20030089321A1 (en) 2003-05-15
JP2004507644A (en) 2004-03-11

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