EP2494177B1 - Crankcase - Google Patents

Crankcase Download PDF

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Publication number
EP2494177B1
EP2494177B1 EP10765383.4A EP10765383A EP2494177B1 EP 2494177 B1 EP2494177 B1 EP 2494177B1 EP 10765383 A EP10765383 A EP 10765383A EP 2494177 B1 EP2494177 B1 EP 2494177B1
Authority
EP
European Patent Office
Prior art keywords
crankcase
chamfer
countersink
cylinder
cylinder bore
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.)
Not-in-force
Application number
EP10765383.4A
Other languages
German (de)
French (fr)
Other versions
EP2494177A1 (en
Inventor
Lars Taenzer
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP2494177A1 publication Critical patent/EP2494177A1/en
Application granted granted Critical
Publication of EP2494177B1 publication Critical patent/EP2494177B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 
    • F02F1/18—Other cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/12—Coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/4927—Cylinder, cylinder head or engine valve sleeve making
    • Y10T29/49272—Cylinder, cylinder head or engine valve sleeve making with liner, coating, or sleeve

Definitions

  • the invention relates to a crankcase for an internal combustion engine with the features of the preamble of patent claim 1.
  • a cylinder crankcase is known, in particular for an internal combustion engine, with at least one cylinder bore for receiving a piston. It is envisaged that the cylinder bore at the cylinder head surface, or the separating surface, of the cylinder crankcase has an inlet chamfer and the cylinder surface is provided with a thermal coating until a transition to the running-in phase.
  • crankcase In the known from the prior art processing, the production of the interface on the crankcase to a cylinder head, simultaneously different materials, the crankcase material and the raceway coating processed. Therefore, it is necessary after the processing of the top surface, or separating surface to the cylinder head back to grind it again, because when milling the cover, or separating particles are dissolved out, which can scratch the top surface or parting unacceptable.
  • a generic crankcase is further from the American patent application US 2006/032473 A1 known. This discloses a crankcase for an internal combustion engine having at least one coated cylinder bore having a chamfer at a parting surface to a cylinder head. Similar crankcases are made US 5199166 or DE102009008741 known. Object of the present invention is to avoid the above drawback.
  • the production according to claim 4 is particularly preferred. This may be, for example, grinding, milling, etc.
  • the chamfer and the countersink are manufactured according to claim 5 in a single operation.
  • the present exemplary embodiment is, for example, a crankcase 1 with three identifiable, coated cylinder bores 2, wherein the embodiment according to the invention can be represented on any desired crankcase for an internal combustion engine with at least one coated cylinder bore 2 ,
  • the crankcase 1 has a separating surface 3 to a cylinder head, not shown.
  • a transition from the cylinder bore 2 is chamfered to the separation surface 3, for better insertion of a piston, not shown (Kolbeneinwovenfase).
  • a countersink 5 is arranged on the chamfer 4.
  • the crankcase 1 is a light metal crankcase, preferably made of a hypoeutectic aluminum-silicon alloy, for example AlSi9Cu3.
  • the cylinder bore 2 is coated, whereby it has on its surface a greater hardness for improved tribology with a piston ring than the remaining material of the crankcase first
  • Fig. 2 shows an enlarged detail of the cylinder bore 2 from Fig. 1 in a two-dimensional sectional view.
  • Fig. 2 is a construction drawing of the chamfer 4 according to the invention with countersink 5.
  • the crankcase 1 is shown hatched and the chamfer 4 is arranged in this embodiment in the cylinder bore 2 only in a coating 6.
  • the chamfer 4 can also extend into the carrier material (here AlSi9Cu3).
  • the chamfer 4 to the cylinder bore 2 at an angle ⁇ between 5 ° and 60 °.
  • the Countersink 5 a depth of at least 0.05 mm and at least 0.1 mm larger diameter than the chamfer 4 on.
  • the chamfer 4 and the countersink 5 machined off, such as by a grinding or milling process, etc.
  • the chamfer 4 and the countersink 5 are made in a single operation.

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

Die Erfindung betrifft ein Kurbelgehäuse für eine Brennkraftmaschine mit den Merkmalen aus dem Oberbegriff des Patentanspruchs 1.The invention relates to a crankcase for an internal combustion engine with the features of the preamble of patent claim 1.

Sie geht von der internationalen Anmeldung mit der Veröffentlichungs-Nr.: WO 00/37789 aus. Aus dieser ist ein Zylinder-Kurbelgehäuse bekannt, insbesondere für eine Verbrennungskraftmaschine, mit wenigstens einer Zylinderbohrung zur Aufnahme eines Kolbens. Es ist vorgesehen, dass die Zylinderbohrung an der Zylinderkopffläche, bzw. der Trennfläche, des Zylinder-Kurbelgehäuses eine Einlauffase aufweist und die Zylinderlauffläche bis zu einem Übergang zu der Einlaufphase mit einer thermischen Beschichtung versehen ist.It is based on the international application with the publication no .: WO 00/37789 out. From this, a cylinder crankcase is known, in particular for an internal combustion engine, with at least one cylinder bore for receiving a piston. It is envisaged that the cylinder bore at the cylinder head surface, or the separating surface, of the cylinder crankcase has an inlet chamfer and the cylinder surface is provided with a thermal coating until a transition to the running-in phase.

Bei der aus dem Stand der Technik bekannten Bearbeitung, der Herstellung der Trennfläche am Kurbelgehäuse zu einem Zylinderkopf, werden gleichzeitig verschiedene Materialien, das Kurbelgehäusematerial und die Laufbahnbeschichtung, bearbeitet. Daher ist es notwendig, nach der Bearbeitung der Deckfläche, bzw. Trennfläche zum Zylinderkopf hin diese nochmals zu schleifen, da beim Fräsen der Deck-, bzw. Trennfläche Partikel herausgelöst werden, die die Deckfläche bzw. Trennfläche unzulässig zerkratzen können. Ein gattungsgemäßes Kurbelgehäuse ist ferner aus der amerikanischen Patentanmeldung US 2006/032473 A1 bekannt. Diese offenbart ein Kurbelgehäuse für eine Brennkraftmaschine mit zumindest einer beschichteten Zylinderbohrung, die an einer Trennfläche zu einem Zylinderkopf eine Fase aufweist. Ähnliche Kurbelgehäuse sind aus US 5199166 oder DE102009008741 bekannt. Aufgabe der vorliegenden Erfindung ist es, den o. g. Nachteil zu vermeiden.In the known from the prior art processing, the production of the interface on the crankcase to a cylinder head, simultaneously different materials, the crankcase material and the raceway coating processed. Therefore, it is necessary after the processing of the top surface, or separating surface to the cylinder head back to grind it again, because when milling the cover, or separating particles are dissolved out, which can scratch the top surface or parting unacceptable. A generic crankcase is further from the American patent application US 2006/032473 A1 known. This discloses a crankcase for an internal combustion engine having at least one coated cylinder bore having a chamfer at a parting surface to a cylinder head. Similar crankcases are made US 5199166 or DE102009008741 known. Object of the present invention is to avoid the above drawback.

Diese Aufgabe wird durch das Merkmal im kennzeichnenden Teil des Patentanspruchs 1 gelöst.
Beim Einbringen der notwendigen Fase zum späteren Einführen eines Kolbens, die sog. Kolbeneinführfase, wird gleichzeitig eine Ansenkung (die Ansenkung kann im Werkzeug gleichzeitig bereits vorgehalten sein) mit eingebracht, die so ausgelegt ist, dass unter Berücksichtigung aller Toleranzen bei der Zylinder- und Trennflächenbearbeitung nur das Kurbelgehäusegussmaterial bearbeitet werden muss. Aufgrund des Einsatzes der Fase mit Ansenkung ist kein weiterer Schleifprozess bei der Kurbelgehäusebearbeitung mehr notwendig (Trennflächenbearbeitung). Dies spart Investitionen in eine zusätzliche Schleifmaschine und natürlich Bearbeitungszeit aufgrund des Entfalls eines kompletten Bearbeitungsvorgangs. Die Ansenkung kann bevorzugt zeitgleich mit dem Einbringen der Fase umgesetzt werden.This object is achieved by the feature in the characterizing part of patent claim 1.
When introducing the necessary chamfer for later insertion of a piston, the so-called Kolbeneinführfase, simultaneously a countersink (the countersink can be held in the tool at the same time already be) with introduced, which is designed so that, taking into account all tolerances in the cylinder and interface machining only the crankcase casting material needs to be machined. Due to the use of the bevel with countersinking, no further grinding process is necessary in the case of crankcase machining (parting surface machining). This saves investment in an additional grinding machine and of course processing time due to the omission of a complete machining operation. The countersink can preferably be implemented simultaneously with the introduction of the chamfer.

Die Größenangaben gemäß der Patentansprüche 2 und 3 sind besonders bevorzugte Ausführungsbeispiele.The size specifications according to the claims 2 and 3 are particularly preferred embodiments.

Die Fertigung gemäß Patentanspruch 4 ist besonders bevorzugt. Hierbei kann es sich beispielsweise um Schleifen, Fräsen usw. handeln.The production according to claim 4 is particularly preferred. This may be, for example, grinding, milling, etc.

Besonders bevorzugt werden die Fase und die Ansenkung gemäß Patentanspruch 5 in einem einzigen Arbeitsgang gefertigt.Particularly preferably, the chamfer and the countersink are manufactured according to claim 5 in a single operation.

Im Folgenden ist die Erfindung anhand eines bevorzugten Ausführungsbeispieles anhand von 2 Figuren näher erläutert.

Fig. 1
zeigt die Aufsicht auf ein dreidimensional geschnitten dargestelltes erfindungsgemäßes Kurbelgehäuse.
Fig. 2
zeigt eine Detailvergrößerung der Zylinderbohrung aus Fig. 1 in einer zweidimensionalen Schnittdarstellung.
In the following the invention with reference to a preferred embodiment with reference to 2 figures is explained in more detail.
Fig. 1
shows the top view of a three-dimensional cut illustrated inventive crankcase.
Fig. 2
shows an enlarged detail of the cylinder bore Fig. 1 in a two-dimensional sectional view.

Fig. 1 zeigt die Aufsicht auf ein dreidimensional geschnitten dargestelltes erfindungsgemäßes Kurbelgehäuse 1. Im vorliegenden Ausführungsbeispiel handelt es sich beispielsweise um ein Kurbelgehäuse 1 mit drei erkennbaren, beschichteten Zylinderbohrungen 2, wobei die erfindungsgemäße Ausgestaltung an jedem beliebigen Kurbelgehäuse für eine Brennkraftmaschine mit zumindest einer beschichteten Zylinderbohrung 2 darstellbar ist. Das Kurbelgehäuse 1 weist eine Trennfläche 3 zu einem nicht dargestellten Zylinderkopf auf. Wie aus dem Stand der Technik bekannt, ist ein Übergang von der Zylinderbohrung 2 zur Trennfläche 3 angefast, zur besseren Einführung eines nicht dargestellten Kolbens (Kolbeneinführfase). Fig. 1 The present exemplary embodiment is, for example, a crankcase 1 with three identifiable, coated cylinder bores 2, wherein the embodiment according to the invention can be represented on any desired crankcase for an internal combustion engine with at least one coated cylinder bore 2 , The crankcase 1 has a separating surface 3 to a cylinder head, not shown. As known from the prior art, a transition from the cylinder bore 2 is chamfered to the separation surface 3, for better insertion of a piston, not shown (Kolbeneinführfase).

Erfindungsgemäß ist an die Fase 4 eine Ansenkung 5 angeordnet. Besonders bevorzugt ist das Kurbelgehäuse 1 ein Leichtmetallkurbelgehäuse, vorzugsweise aus einer untereutektischen Aluminium-Silizium-Legierung, beispielsweise AlSi9Cu3. Darüber hinaus ist die Zylinderbohrung 2 beschichtet, wodurch diese an ihrer Oberfläche eine größere Härte für eine verbesserte Tribologie mit einem Kolbenring aufweist als das restliche Material des Kurbelgehäuses 1.According to the invention, a countersink 5 is arranged on the chamfer 4. Particularly preferably, the crankcase 1 is a light metal crankcase, preferably made of a hypoeutectic aluminum-silicon alloy, for example AlSi9Cu3. In addition, the cylinder bore 2 is coated, whereby it has on its surface a greater hardness for improved tribology with a piston ring than the remaining material of the crankcase first

Fig. 2 zeigt eine Detailvergrößerung der Zylinderbohrung 2 aus Fig. 1 in einer zweidimensionalen Schnittdarstellung. Fig. 2 ist eine Konstruktionszeichnung der erfindungsgemäßen Fase 4 mit Ansenkung 5. Das Kurbelgehäuse 1 ist schraffiert dargestellt und die Fase 4 ist in diesem Ausführungsbeispiel in der Zylinderbohrung 2 nur in einer Beschichtung 6 angeordnet. Die Fase 4 kann allerdings abhängig von der Toleranzsituation auch bis in das Trägermaterial (hier AlSi9Cu3) hineinreichen. Fig. 2 shows an enlarged detail of the cylinder bore 2 from Fig. 1 in a two-dimensional sectional view. Fig. 2 is a construction drawing of the chamfer 4 according to the invention with countersink 5. The crankcase 1 is shown hatched and the chamfer 4 is arranged in this embodiment in the cylinder bore 2 only in a coating 6. Depending on the tolerance situation, however, the chamfer 4 can also extend into the carrier material (here AlSi9Cu3).

Besonders bevorzugt weist die Fase 4 zur Zylinderbohrung 2 einen Winkel α zwischen 5° und 60° auf. Ebenfalls besonders bevorzugt weist die Ansenkung 5 eine Tiefe von mindestens 0,05 mm und einen um mindestens 0,1 mm größeren Durchmesser als die Fase 4 auf. Ebenfalls besonders bevorzugt werden die Fase 4 und die Ansenkung 5 Span abhebend gefertigt, wie beispielsweise durch einen Schleif- oder Fräsprozess, usw. Ebenfalls besonders bevorzugt werden die Fase 4 und die Ansenkung 5 in einem einzigen Arbeitsgang gefertigt.Particularly preferably, the chamfer 4 to the cylinder bore 2 at an angle α between 5 ° and 60 °. Likewise particularly preferred, the Countersink 5 a depth of at least 0.05 mm and at least 0.1 mm larger diameter than the chamfer 4 on. Also particularly preferred are the chamfer 4 and the countersink 5 machined off, such as by a grinding or milling process, etc. Also particularly preferably the chamfer 4 and the countersink 5 are made in a single operation.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1.1.
Kurbelgehäusecrankcase
2.Second
Zylinderbohrungbore
3.Third
Trennflächeinterface
4.4th
Fasechamfer
5.5th
Ansenkungcountersink
6.6th
Beschichtungcoating

Claims (5)

  1. A crankcase (1) for an internal combustion engine comprising at least one coated cylinder bore (2) which has a chamfer (4) on a separating surface (3) to a cylinder head,
    characterised in that a countersink (5) is arranged coaxially on the chamfer (4), facing the cylinder head.
  2. A crankcase according to claim 1,
    characterised in that the chamfer (4) has an angle of between 5° and 60 ° with respect to the cylinder bore (2).
  3. A crankcase according to claim 2,
    characterised in that the countersink (5) has a depth of at least 0.05 mm and a diameter which is greater by at least 0.1 mm than the chamfer (4).
  4. A crankcase according to any of claims 1 to 3,
    characterised in that the chamfer (4) and the countersink (5) are produced by machining.
  5. A crankcase according to any of claims 1 to 4,
    characterised in that the chamfer (4) and the countersink (5) are produced in a single operation.
EP10765383.4A 2009-10-31 2010-10-02 Crankcase Not-in-force EP2494177B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009051517A DE102009051517A1 (en) 2009-10-31 2009-10-31 crankcase
PCT/EP2010/006025 WO2011050891A1 (en) 2009-10-31 2010-10-02 Crankcase

Publications (2)

Publication Number Publication Date
EP2494177A1 EP2494177A1 (en) 2012-09-05
EP2494177B1 true EP2494177B1 (en) 2017-05-03

Family

ID=43530074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10765383.4A Not-in-force EP2494177B1 (en) 2009-10-31 2010-10-02 Crankcase

Country Status (5)

Country Link
US (1) US8683972B2 (en)
EP (1) EP2494177B1 (en)
CN (1) CN102656356B (en)
DE (1) DE102009051517A1 (en)
WO (1) WO2011050891A1 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2932506A1 (en) * 1979-08-10 1981-02-26 Daimler Benz Ag IC engine bush-crankcase seal - has recess in flange or counterbore increasing gap volume
CH672353A5 (en) * 1987-05-14 1989-11-15 Sulzer Ag Cylinder lining for IC engine - has cylinder wall shoulder, protruding into combustion chamber above top piston ring level
JPH04128539A (en) * 1990-09-20 1992-04-30 Sanshin Ind Co Ltd Cylinder block of engine
JP3502689B2 (en) * 1995-03-23 2004-03-02 ヤマハ発動機株式会社 Plating cylinder block and plating method thereof
KR980008780U (en) * 1996-07-08 1998-04-30 김영귀 Structure of airtightness of cylinder head
WO2000037789A1 (en) 1998-12-18 2000-06-29 Volkswagen Aktiengesellschaft Cylinder housing and method for producing a cylinder housing
DE10241370B4 (en) * 2002-09-06 2007-09-27 Bayerische Motoren Werke Ag Cylinder head gasket
JP4135634B2 (en) * 2003-12-25 2008-08-20 三菱自動車工業株式会社 Engine cylinder liner structure
DE102004038183A1 (en) * 2004-08-06 2006-03-16 Daimlerchrysler Ag Method for machining cylinder crankshaft housings with injection-molded cylinder liners
DE102009008741B4 (en) * 2009-02-12 2014-11-20 Bayerische Motoren Werke Aktiengesellschaft crankcase
WO2010132818A1 (en) * 2009-05-15 2010-11-18 Pelmear Douglas A Internal combustion engine and method of operating same

Also Published As

Publication number Publication date
DE102009051517A1 (en) 2011-05-05
US20120234284A1 (en) 2012-09-20
CN102656356B (en) 2014-10-22
EP2494177A1 (en) 2012-09-05
CN102656356A (en) 2012-09-05
WO2011050891A1 (en) 2011-05-05
US8683972B2 (en) 2014-04-01

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