EP2441549A2 - Method for mechanical processing a waste gas conveying surface area of a combustion engine or crankcase component as well as combustion engine crankcase and cylinder liner - Google Patents

Method for mechanical processing a waste gas conveying surface area of a combustion engine or crankcase component as well as combustion engine crankcase and cylinder liner Download PDF

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Publication number
EP2441549A2
EP2441549A2 EP11005427A EP11005427A EP2441549A2 EP 2441549 A2 EP2441549 A2 EP 2441549A2 EP 11005427 A EP11005427 A EP 11005427A EP 11005427 A EP11005427 A EP 11005427A EP 2441549 A2 EP2441549 A2 EP 2441549A2
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EP
European Patent Office
Prior art keywords
machining
crankcase
exhaust
combustion engine
tribochemically
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.)
Granted
Application number
EP11005427A
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German (de)
French (fr)
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EP2441549A3 (en
EP2441549B1 (en
Inventor
Peter Scharf
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.)
MAN Truck and Bus SE
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MAN Truck and Bus SE
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Publication of EP2441549A2 publication Critical patent/EP2441549A2/en
Publication of EP2441549A3 publication Critical patent/EP2441549A3/en
Application granted granted Critical
Publication of EP2441549B1 publication Critical patent/EP2441549B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
    • B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
    • 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 headsĀ 
    • 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
    • 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
    • Y10T29/49231—I.C. [internal combustion] engine making
    • 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
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating

Definitions

  • the invention relates to a method for machining, in particular for mechanical processing, at least one exhaust-carrying surface region of an internal combustion engine or crankcase component, in particular for processing at least one cylinder bore of an internal combustion engine crankcase or for processing at least one cylinder bore of a cylinder liner, according to the preamble of claim 1. Further The invention relates to an internal combustion engine crankcase according to the preamble of claim 7 and to a cylinder liner according to the preamble of claim 8.
  • Crankcases of internal combustion engines are well known. These serve to support the crankshaft and have cylinders with cylinder liners in which the pistons of the internal combustion engines are performed. In conjunction with exhaust gas recirculation, it may be used in the operation of internal combustion engines with a high sulfur fuel to form from aggressive media, for example, to the formation of sulfur oxides and nitrogen oxides that form with aggressive water aggressive acids such as sulfuric acid. These aggressive media or acids cause a corrosive attack in the exhaust-gas-carrying components of an engine crankcase produced from a material susceptible to corrosion, for example in the region of cylinder liners of an internal combustion engine crankcase.
  • the conventional iron casting materials or steels can be coated with less corrosive materials, for example with iron-chromium alloys, but this leads to a significant increase in the price of the engine crankcase or Cylinder liners in total leads.
  • the at least one exhaust-carrying surface area can be reliably and reliably protected against corrosion, in particular reliably against internal engine corrosion, in a simple and functionally reliable manner.
  • a further object of the present invention is seen to provide an internal combustion engine crankcase and / or a cylinder liner, whose or at least one exhaust-carrying surface area, in particular whose or whose at least one cylinder bore is reliably protected against corrosion by aggressive media ,
  • the at least one exhaust gas-carrying surface region of the crankcase of the engine or crankcase component in particular at least one cylinder bore of a crankcase or cylinder liner, be machined by means of a machining tool changing the surface finish with at least one tribochemically activatable material in the machining process Brought in contact is activated in the course of processing, in particular in response to a defined contact pressure of the machining tool and / or a defined during machining defined processing temperature, and formed with the respective surface area by tribochemical reaction a corrosion-resistant surface as Triborevatis Mrs.
  • a corrosion-resistant surface can be formed by a simple tribochemical reaction within the framework of the processing of the exhaust-gas-conducting surface regions, which modification takes place anyway and which changes the surface condition.
  • this corrosion-resistant surface against aggressive acids, gases and condensates such as may occur during operation of internal combustion engines with exhaust gas recirculation and sulfur-containing fuel, thus not only subsequently generated or during operation of the internal combustion engine, but previously integral with the surface texture changing processing of respective component in the context of its production.
  • any machining tool can be used by means of which the formation of a triboreaction layer according to the invention can be achieved, for example also thermally acting machining methods such as, for example, laser honing, provided they do not result in evaporation of the tribochemically activatable substance.
  • the surface condition changing machining tool is a mechanical machining tool, preferably a machined and / or cutting machining tool, by means of which the at least one exhaust-carrying surface region, in particular the at least one cylinder bore, is machined and changed with respect to the surface finish.
  • the terms of a machining and a machining should be understood explicitly in a broad sense and include any mechanical processing in which the machined surface is changed and thus brought into a particular shape, be it by a geometrically determined or by a geometrically indefinite cutting edge ,
  • a honing tool as a mechanical machining tool, by means of which the at least one exhaust-carrying surface area, in particular the cylinder surfaces, is honed, wherein all honing methods can be used individually or in combination.
  • Honing regularly represents the last processing stage in the production of the engine crankcase, in particular for dimensionally accurate design of the cylinder bore and thus the cylinder liners of the crankcase. The honing ensures that, for example, the cylinder liners of the crankcase have the desired oil retention capacity, since the honed surfaces have crossed machining marks.
  • the tribochemically activatable substance can be applied before and / or during processing by means of the respective processing tool directly to the surface to be processed, for example, applied as a solid layer or sprayed as a spray, the tribochemically activatable material then as homogeneous and fine is distributed in the respective funds; Alternatively or additionally, however, the tribochemically activatable substance can also be added as an additive to a lubricant which is to be supplied anyway during processing, in particular during mechanical processing.
  • lubricant is to be understood here in a comprehensive sense and is expressly to include all liquid media which are supplied in conjunction with the particular mechanical processing as an emulsion or the like in a conventional manner.
  • the addition of the tribochemically activatable substance as an additive to such a lubricant is particularly easy to accomplish and ensures in a simple manner that the tribochemically activatable substance comes exactly where the tribochemical reaction to take place to form the corrosion-resistant surface.
  • tribochemically activatable substance are in particular metal silicates, optionally also boron compounds.
  • the additive is preferably dissolved or emulsified in a concentrate in a defined amount, which concentrate is then added to the lubricant in a concentration of 7 to 15%, preferably in about 10%, based on the amount of lubricant, in particular emulsified there.
  • the exhaust-carrying surface regions can form
  • Components of an internal combustion engine such as a crankcase and / or a cylinder liner, be made of a cost-effective iron material, for example, from a corrosion-prone cast iron and / or a corrosion-prone steel.
  • a here also very schematically illustrated honing 2 is introduced to perform a fine machining of the cylinder bore 3 in a conventional manner.
  • the honing head 2 has a plurality of honing stones 4 carrying honing stones 5 distributed over the circumference, which are spaced apart in the circumferential direction.
  • the Honahle 2 conventional design. The Honahle 2 performs the mechanical fine machining of the cylinder barrel 3 a rotational movement according to the arrow 6 with feed in the direction of arrow 7, to produce a cylinder liner 3 with the desired Honriefen (not shown).
  • a lubricant 9 is applied by means of a lubricant nozzle 8 shown here only extremely schematically in the cylinder bore and thus on the cylinder bore 3, which in the FIG. 1 is shown only extremely schematically and by way of example.
  • the supplied here lubricant 9 is withdrawn from a lubricant reservoir 10, which in the single Figure is also shown only very schematically.
  • the lubricant 9 is composed here of a base lubricant emulsion 12, in which a tribochemically activatable additive 11, for example a metal silicate, is emulsified or finely divided, so that the cylinder liner 3 in the context of mechanical fine machining by means of the honing hone 2 with the tribochemical activatable additive is wetted.
  • a tribochemically activatable additive for example a metal silicate
  • crankcase itself and thus the cylinder liners 3 are preferably made of an example cast iron material prior to processing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The method for machining an exhaust-gas-conducting surface region of an internal combustion engine or crankcase part, comprises: machining the exhaust-gas-conducting surface region produced from a corrodible material using a surface-condition-changing machining tool; bringing the exhaust-gas-conducting surface region into contact, during the machining, with a tribochemically activatable substance activated during the machining; and forming a corrosion-resistant surface as a triboreaction layer with the respective surface region, by tribochemical reaction. The method for machining an exhaust-gas-conducting surface region of an internal combustion engine or crankcase part, comprises: machining the exhaust-gas-conducting surface region produced from a corrodible material using a surface-condition-changing machining tool; bringing the exhaust-gas-conducting surface region into contact, during the machining, with a tribochemically activatable substance activated during the machining; forming a corrosion-resistant surface as a triboreaction layer with the respective surface region, by tribochemical reaction; providing a cylinder barrel (3) of an internal combustion engine crankcase or the cylinder barrel of a cylinder sleeve as the exhaust-gas-conducting surface region; activating the tribochemically activatable substance as a function of a defined contact pressure of the machining tool or a defined machining temperature generated during the machining, where the machining step is carrying out by mechanically machining and changing the exhaust-gas-conducting surface region with regard to surface condition using a mechanical machining tool as the surface-condition-changing machining tool; providing a chip-removing or chip-forming machining tool as the surface-condition-changing machining tool; providing a honing tool as the surface-condition-changing machining tool; applying the tribochemically activatable substance directly to the surface to be mechanically machined before or during the machining using the machining tool; adding the tribochemically activatable substance as an additive to a lubricant (9) supplied during the mechanical machining; applying the tribochemically activatable substance directly to the surface to be mechanically machined before or during the machining using the machining tool; forming the tribochemically activatable substance of a metal silicate; and producing the triboreaction layer in a final machining step before finishing the part. The crankcase is formed of a material consisting of an iron material, a corrodible cast iron and a corrodible steel. Independent claims are included for: (1) an internal combustion engine crankcase; and (2) a cylinder sleeve.

Description

Die Erfindung betrifft ein Verfahren zur Bearbeitung, insbesondere zur mechanischen Bearbeitung, wenigstens eines abgasfĆ¼hrenden OberflƤchenbereichs eines Brennkraftmaschinen- oder KurbelgehƤusebestandteils, insbesondere zur Bearbeitung wenigstens einer Zylinderlaufbahn eines Brennkraftmaschinen-KurbelgehƤuses oder zur Bearbeitung wenigstens einer Zylinderlaufbahn einer Zylinderlaufbuchse, nach dem Oberbegriff des Anspruchs 1. Ferner betrifft die Erfindung ein Brennkraftmaschinen-KurbelgehƤuse nach dem Oberbegriff des Anspruchs 7 sowie eine Zylinderlaufbuchse nach dem Oberbegriff des Anspruchs 8.The invention relates to a method for machining, in particular for mechanical processing, at least one exhaust-carrying surface region of an internal combustion engine or crankcase component, in particular for processing at least one cylinder bore of an internal combustion engine crankcase or for processing at least one cylinder bore of a cylinder liner, according to the preamble of claim 1. Further The invention relates to an internal combustion engine crankcase according to the preamble of claim 7 and to a cylinder liner according to the preamble of claim 8.

KurbelgehƤuse von Brennkraftmaschinen sind allgemein bekannt. Diese dienen zur Lagerung der Kurbelwelle und weisen Zylinder mit Zylinderlaufbahnen auf, in denen die Kolben der Verbrennungsmaschinen gefĆ¼hrt werden. In Verbindung mit einer AbgasrĆ¼ckfĆ¼hrung kann es beim Betrieb von Brennkraftmaschinen mit einem stark schwefelhaltigen Kraftstoff zur Bildung von aggressiven Medien kommen, zum Beispiel zur Bildung von Schwefeloxiden und Stickoxiden, die mit kondensiertem Wasser aggressive SƤuren, wie zum Beispiel SchwefelsƤure bilden. Diese aggressiven Medien bzw. SƤuren verursachen in den abgasfĆ¼hrenden Bauteilen eines aus einem korrosionsanfƤlligen Werkstoff hergestellten Brennkraftmaschinen-KurbelgehƤuses, zum Beispiel im Bereich von Zylinderlaufbahnen eines Brennkraftmaschinen-KurbelgehƤuses, einen korrosiven Angriff. Damit kommt es zu einer Zerstƶrung der OberflƤchenbereiche der Zylinderlaufbahnen und schlieƟlich zu einer BeschƤdigung bzw. Zerstƶrung derselben, was sich bekanntlich nachteilig auf den Brennkraftmaschinenbetrieb insgesamt auswirkt. Das Gleiche gilt vom Prinzip her fĆ¼r solche Zylinderlaufbahnen, die durch in das KurbelgehƤuse eingesetzte bzw. eingegossene Zylinderlaufbuchsen, auch Zylinderliner genannt, gebildet werden.Crankcases of internal combustion engines are well known. These serve to support the crankshaft and have cylinders with cylinder liners in which the pistons of the internal combustion engines are performed. In conjunction with exhaust gas recirculation, it may be used in the operation of internal combustion engines with a high sulfur fuel to form from aggressive media, for example, to the formation of sulfur oxides and nitrogen oxides that form with aggressive water aggressive acids such as sulfuric acid. These aggressive media or acids cause a corrosive attack in the exhaust-gas-carrying components of an engine crankcase produced from a material susceptible to corrosion, for example in the region of cylinder liners of an internal combustion engine crankcase. This leads to a destruction of the surface areas of the cylinder liners and finally to damage or destruction of the same, which is known to adversely affect the overall operation of the internal combustion engine. The same applies in principle for such cylinder liners, which are formed by inserted into the crankcase or cast cylinder liners, also called cylinder liner.

Des Weiteren ist es allgemein bekannt, zum Beispiel aus der DE 10 2007 017 977 A1 , die Zylinderlaufbahnen eines Brennkraftmaschinen-KurbelgehƤuses durch Honen mechanisch fein zu bearbeiten, um zwischen dem Kolben und der Zylinderlaufbahn gute Gleiteigenschaften einzustellen. Derartige aufwendig fein bearbeitete OberflƤchen werden jedoch durch den zuvor beschriebenen SƤureangriff beim Betrieb der Brennkraftmaschine mit schwefelhaltigen Kraftstoff zerstƶrt und fĆ¼hren schnell zu einer Nacharbeitnotwendigkeit der Zylinderlaufbahnen, was ersichtlich teuer und aufwendig ist.Furthermore, it is well known, for example from the DE 10 2007 017 977 A1 to mechanically finely machine the cylinder liners of an engine crankcase by honing to set good sliding properties between the piston and the cylinder liner. However, such elaborately finely machined surfaces are destroyed by the acid attack described above during operation of the internal combustion engine with sulfur-containing fuel and quickly lead to a Nacharbeitnotwendigkeit the cylinder liners, which is obviously expensive and expensive.

Um einen derartigen Korrosionsangriff durch aggressive SƤuren, Gase und Kondensate zu begegnen, kƶnnen zum Beispiel die herkƶmmlichen Eisengusswerkstoffe bzw. StƤhle mit weniger korrosivanfƤlligen Werkstoffen beschichtet werden, zum Beispiel mit Eisen-Chrom-Legierungen, was jedoch zu einer deutlichen Verteuerung der Brennkraftmaschinen-KurbelgehƤuse oder Zylinderlaufbuchsen insgesamt fĆ¼hrt.To counteract such a corrosion attack by aggressive acids, gases and condensates, for example, the conventional iron casting materials or steels can be coated with less corrosive materials, for example with iron-chromium alloys, but this leads to a significant increase in the price of the engine crankcase or Cylinder liners in total leads.

Es ist daher Aufgabe der vorliegenden Erfindung, ein Verfahren zur Bearbeitung, insbesondere zur mechanischen Bearbeitung, wenigstens eines abgasfĆ¼hrenden OberflƤchenbereichs eines Brennkraftmaschinen- oder KurbelgehƤusebestandteils, insbesondere zur Bearbeitung wenigstens einer Zylinderlaufbahn eines Brennkraftmaschinen-KurbelgehƤuses oder zur Bearbeitung wenigstens einer Zylinderlaufbahn einer Zylinderlaufbuchse, zu schaffen, mittels dem der wenigstens eine abgasfĆ¼hrende OberflƤchenbereich auf einfache und funktionssichere Weise zuverlƤssig gegen Korrosion, insbesondere zuverlƤssig gegen innermotorische Korrosion, geschĆ¼tzt werden kann. Eine weitere Aufgabe der vorliegenden Erfindung wird darin gesehen, ein Brennkraftmaschinen-KurbelgehƤuse und/oder eine Zylinderlaufbuchse zur VerfĆ¼gung zu stellen, dessen bzw. deren wenigstens einer abgasfĆ¼hrender OberflƤchenbereich, insbesondere dessen bzw. deren wenigstens eine Zylinderlaufbahn, zuverlƤssig gegen Korrosion durch aggressive Medien geschĆ¼tzt ist.It is therefore an object of the present invention to provide a method for machining, in particular for machining, at least one exhaust-carrying surface region of an internal combustion engine or crankcase component, in particular for machining at least one cylinder bore of an internal combustion engine crankcase or for machining at least one cylinder bore of a cylinder liner. by means of which the at least one exhaust-carrying surface area can be reliably and reliably protected against corrosion, in particular reliably against internal engine corrosion, in a simple and functionally reliable manner. A further object of the present invention is seen to provide an internal combustion engine crankcase and / or a cylinder liner, whose or at least one exhaust-carrying surface area, in particular whose or whose at least one cylinder bore is reliably protected against corrosion by aggressive media ,

Diese Aufgabe wird bezĆ¼glich des Verfahrens gelƶst mit den Merkmalen des Anspruchs 1. BezĆ¼glich des Brennkraftmaschinen-KurbelgehƤuses wird diese Aufgabe gelƶst mit den Merkmalen des Anspruchs 7. BezĆ¼glich der Zylinderlaufbuchse wird diese Aufgabe gelƶst mit den Merkmalen des Anspruchs 8. Vorteilhafte Ausgestaltungen sind in den UnteransprĆ¼chen angegeben.This object is achieved with respect to the method with the features of claim 1. With respect to the engine crankcase, this object is achieved with the features of claim 7. With respect to the cylinder liner this object is achieved with the features of claim 8. Advantageous embodiments are in the dependent claims specified.

ErfindungsgemƤƟ wird vorgeschlagen, dass der wenigstens eine aus einem korrosionsanfƤlligen Werkstoff hergestellte abgasfĆ¼hrende OberflƤchenbereich des KurbelgehƤuses des Brennkraftmaschinen- oder KurbelgehƤusebestandteils, insbesondere wenigstens eine Zylinderlaufbahn eines KurbelgehƤuses oder einer Zylinderlaufbuchse, im Rahmen der Bearbeitung mittels eines die OberflƤchenbeschaffenheit verƤndernden Bearbeitungswerkzeuges mit wenigstens einem tribochemisch aktivierbaren Stoff in Kontakt gebracht wird, der im Verlauf der Bearbeitung, insbesondere in AbhƤngigkeit von einem definierten Anpressdruck des Bearbeitungswerkzeuges und/oder einer sich wƤhrend der Bearbeitung einstellenden definierten Bearbeitungstemperatur, aktiviert wird und mit dem jeweiligen OberflƤchenbereich durch tribochemische Reaktion eine korrosionsbestƤndige OberflƤche als Triboreaktionsschicht ausbildet.According to the invention, it is proposed that the at least one exhaust gas-carrying surface region of the crankcase of the engine or crankcase component, in particular at least one cylinder bore of a crankcase or cylinder liner, be machined by means of a machining tool changing the surface finish with at least one tribochemically activatable material in the machining process Brought in contact is activated in the course of processing, in particular in response to a defined contact pressure of the machining tool and / or a defined during machining defined processing temperature, and formed with the respective surface area by tribochemical reaction a corrosion-resistant surface as Triboreaktionsschicht.

Damit kƶnnen aufwendige Beschichtungsverfahren im Nachgang zur Herstellung des jeweiligen Bauteils vorteilhaft vermieden werden, ebenso wie der Einsatz von teuren, korrosionsbestƤndigen Werkstoffen vermieden werden kann. Vielmehr kann mit der vorliegenden Erfindung im Rahmen der ohnehin stattfindenden, die OberflƤchenbeschaffenheit verƤndernden Bearbeitung der abgasfĆ¼hrenden OberflƤchenbereiche durch eine einfache tribochemische Reaktion eine korrosionsbestƤndige OberflƤche ausgebildet werden.In order to elaborate coating methods can be advantageously avoided in the wake of the production of the respective component, as well as the use of expensive, corrosion-resistant materials can be avoided. Rather, with the present invention, a corrosion-resistant surface can be formed by a simple tribochemical reaction within the framework of the processing of the exhaust-gas-conducting surface regions, which modification takes place anyway and which changes the surface condition.

ErfindungsgemƤƟ wird diese korrosionsbestƤndige OberflƤche gegen aggressive SƤuren, Gase und Kondensate, wie sie beim Betrieb von Brennkraftmaschinen mit AbgasrĆ¼ckfĆ¼hrung und schwefelhaltigem Kraftstoff entstehen kƶnnen, somit nicht erst nachtrƤglich bzw. im Betrieb der Brennkraftmaschine erzeugt, sondern bereits vorher integral mit der die OberflƤchenbeschaffenheit Ƥndernden Bearbeitung des jeweiligen Bauteils im Rahmen dessen Herstellung.According to the invention, this corrosion-resistant surface against aggressive acids, gases and condensates, such as may occur during operation of internal combustion engines with exhaust gas recirculation and sulfur-containing fuel, thus not only subsequently generated or during operation of the internal combustion engine, but previously integral with the surface texture changing processing of respective component in the context of its production.

GrundsƤtzlich kann jedes Bearbeitungswerkzeug verwendet werden, mittels dem die erfindungsgemƤƟe Ausbildung einer Triboreaktionsschicht erzielt werden kann, zum Beispiel auch thermisch wirkende Bearbeitungsverfahren wie zum Beispiel das Laserhonen, sofern diese keine Verdampfung des tribochemisch aktivierbaren Stoffes zur Folge haben. Vorzugsweise ist das die OberflƤchenbeschaffenheit verƤndernde Bearbeitungswerkzeug jedoch ein mechanisches Bearbeitungswerkzeug, bevorzugt ein spanabhebendes und/oder spanendes Bearbeitungswerkzeug, mittels dem der wenigstens eine abgasfĆ¼hrende OberflƤchenbereich, insbesondere die wenigstens eine Zylinderlaufbahn, mechanisch bearbeitet und hinsichtlich der OberflƤchenbeschaffenheit verƤndert wird. Die Begrifflichkeit einer spanabhebenden und einer spanenden Bearbeitung soll dabei ausdrĆ¼cklich in einem weiten Sinne verstanden werden und jedwede mechanische Bearbeitung umfassen, bei der die bearbeitete OberflƤche verƤndert und damit in eine bestimmte Form gebracht wird, sei es durch eine geometrisch bestimmte oder durch eine geometrisch unbestimmte Schneide.In principle, any machining tool can be used by means of which the formation of a triboreaction layer according to the invention can be achieved, for example also thermally acting machining methods such as, for example, laser honing, provided they do not result in evaporation of the tribochemically activatable substance. Preferably, however, the surface condition changing machining tool is a mechanical machining tool, preferably a machined and / or cutting machining tool, by means of which the at least one exhaust-carrying surface region, in particular the at least one cylinder bore, is machined and changed with respect to the surface finish. The terms of a machining and a machining should be understood explicitly in a broad sense and include any mechanical processing in which the machined surface is changed and thus brought into a particular shape, be it by a geometrically determined or by a geometrically indefinite cutting edge ,

Besonders bevorzugt ist als mechanisches Bearbeitungswerkzeug ein Honwerkzeug, mittels dem der wenigstens eine abgasfĆ¼hrende OberflƤchenbereich, insbesondere die Zylinderlaufbahnen, gehont wird, wobei sƤmtliche Honverfahren einzeln oder in Kombination einsetzbar sind. Das Honen stellt regelmƤƟig die letzte Bearbeitungsstufe bei der Herstellung des Brennkraftmaschinen-KurbelgehƤuses dar, insbesondere zur maƟgenauen Ausbildung der Zylinderbohrung und damit der Zylinderlaufbahnen des KurbelgehƤuses. Durch das Honen wird sichergestellt, dass zum Beispiel die Zylinderlaufbahnen des KurbelgehƤuses das gewĆ¼nschte Ɩlhaltevermƶgen aufweisen, da die gehonten FlƤchen gekreuzte Bearbeitungsriefen aufweisen.Particularly preferred is a honing tool as a mechanical machining tool, by means of which the at least one exhaust-carrying surface area, in particular the cylinder surfaces, is honed, wherein all honing methods can be used individually or in combination. Honing regularly represents the last processing stage in the production of the engine crankcase, in particular for dimensionally accurate design of the cylinder bore and thus the cylinder liners of the crankcase. The honing ensures that, for example, the cylinder liners of the crankcase have the desired oil retention capacity, since the honed surfaces have crossed machining marks.

Des Weiteren wird im Rahmen einer mechanischen Bearbeitung durch den Kontakt des Werkzeugs mit der zu bearbeitenden OberflƤche sichergestellt, dass hohe Reaktionsenergien, insbesondere im Hinblick auf einen Anpressdruck und/oder eine Bearbeitungstemperatur, entstehen, die zur Aktivierung des tribochemisch aktivierbaren Stoffes fĆ¼hren und somit die korrosionsbestƤndige OberflƤche als Triboreaktionsschicht ausbilden kƶnnen. Damit kƶnnen somit die im Rahmen der mechanischen Bearbeitung ohnehin entstehenden hohen AnpressdrĆ¼cke und Temperaturen vorteilhaft ausgenutzt werden, um den tribochemisch aktivierbaren Stoff so zu aktivieren, dass dieser mit dem jeweiligen OberflƤchenbereich eine korrosionsbestƤndige OberflƤche ausbildet.Furthermore, as part of a mechanical processing by the contact of the tool with the surface to be machined ensured that high reaction energies, especially with regard to a contact pressure and / or a processing temperature, arise, which lead to the activation of the tribochemically activatable substance and thus the corrosion resistant Form surface as Triboreaktionsschicht. In this way, the high contact pressures and temperatures that occur anyway in the course of mechanical processing can thus be advantageously exploited in order to activate the tribochemically activatable substance such that it can be activated forms a corrosion-resistant surface with the respective surface area.

Der tribochemisch aktivierbare Stoff kann dabei zum einen vor und/oder wƤhrend der Bearbeitung mittels des jeweiligen Bearbeitungswerkzeuges direkt auf die zu bearbeitende OberflƤche aufgebracht werden, zum Beispiel als feste Schicht aufgebracht oder als SprĆ¼hschicht aufgesprĆ¼ht werden, wobei der tribochemisch aktivierbare Stoff dann mƶglichst homogen und fein im jeweiligen Mittel verteilt ist; alternativ oder zusƤtzlich kann der tribochemisch aktivierbare Stoff aber auch als Additiv einem bei der Bearbeitung, insbesondere bei der mechanischen Bearbeitung ohnehin zuzufĆ¼hrenden Schmiermittel beigemischt sein. Die Begrifflichkeit Schmiermittel ist hier in einem umfassenden Sinne zu verstehen und soll ausdrĆ¼cklich sƤmtliche flĆ¼ssigen Medien umfassen, die in Verbindung mit der insbesondere mechanischen Bearbeitung als Emulsion oder dergleichen in Ć¼blicher Weise zugefĆ¼hrt werden. Insbesondere die Zugabe des tribochemisch aktivierbaren Stoffes als Additiv zu einem derartigen Schmiermittel ist besonders einfach zu bewerkstelligen und stellt auf einfache Weise sicher, dass der tribochemisch aktivierbare Stoff genau dort hinkommt, wo die tribochemische Reaktion zur Ausbildung der korrosionsbestƤndigen OberflƤche stattfinden soll.The tribochemically activatable substance can be applied before and / or during processing by means of the respective processing tool directly to the surface to be processed, for example, applied as a solid layer or sprayed as a spray, the tribochemically activatable material then as homogeneous and fine is distributed in the respective funds; Alternatively or additionally, however, the tribochemically activatable substance can also be added as an additive to a lubricant which is to be supplied anyway during processing, in particular during mechanical processing. The term lubricant is to be understood here in a comprehensive sense and is expressly to include all liquid media which are supplied in conjunction with the particular mechanical processing as an emulsion or the like in a conventional manner. In particular, the addition of the tribochemically activatable substance as an additive to such a lubricant is particularly easy to accomplish and ensures in a simple manner that the tribochemically activatable substance comes exactly where the tribochemical reaction to take place to form the corrosion-resistant surface.

Als tribochemisch aktivierbarer Stoff eignen sich insbesondere Metallsilikate, gegebenenfalls auch Borverbindungen. Das Additiv wird bevorzugt in einem Konzentrat in definierter Menge gelƶst bzw. emulgiert, welches Konzentrat dann dem Schmiermittel in einer Konzentration von 7 bis 15%, bevorzugt in etwa 10%, bezogen auf die Schmiermittelmenge zugegeben wird, insbesondere dort emulgiert wird.As a tribochemically activatable substance are in particular metal silicates, optionally also boron compounds. The additive is preferably dissolved or emulsified in a concentrate in a defined amount, which concentrate is then added to the lubricant in a concentration of 7 to 15%, preferably in about 10%, based on the amount of lubricant, in particular emulsified there.

Wie bereits zuvor dargestellt, kƶnnen aufgrund der erfindungsgemƤƟen VerfahrensfĆ¼hrung die die abgasfĆ¼hrenden OberflƤchenbereiche ausbildendenAs already stated above, due to the process control according to the invention, the exhaust-carrying surface regions can form

Bauteile einer Brennkraftmaschine, wie zum Beispiel ein KurbelgehƤuse und/oder eine Zylinderlaufbuchse, aus einem kostengĆ¼nstigen Eisenwerkstoff hergestellt sein, zum Beispiel aus einem korrosionsanfƤlligen Gusseisen und/oder einem korrosionsanfƤlligen Stahl.Components of an internal combustion engine, such as a crankcase and / or a cylinder liner, be made of a cost-effective iron material, for example, from a corrosion-prone cast iron and / or a corrosion-prone steel.

Die sich in Verbindung mit einem Brennkraftmaschinen-KurbelgehƤuse mit abgasfĆ¼hrenden OberflƤchenbereichen, insbesondere mit Zylinderlaufbahnen, bzw. mit einer Zylinderlaufbuchse ergebenden Vorteile sind die Gleichen, wie sie zuvor mit der erfindungsgemƤƟen VerfahrensfĆ¼hrung beschrieben worden sind. Insofern wird hier auf die zuvor gemachten AusfĆ¼hrungen verwiesen.The advantages which result in conjunction with an internal combustion engine crankcase with exhaust-carrying surface regions, in particular with cylinder liners, or with a cylinder liner, are the same as have been described above with the process control according to the invention. In this respect, reference is made to the statements made above.

In der einzigen Figur ist schematisch und beispielhaft ein Zylinder 1 eines hier nicht weiter dargestellten KurbelgehƤuses einer Brennkraftmaschine gezeigt, in dessen Zylinderbohrung eine hier ebenfalls ƤuƟerst schematisch dargestellte Honahle 2 eingefĆ¼hrt ist, um eine Feinbearbeitung der Zylinderlaufbahn 3 in an sich bekannter Weise durchzufĆ¼hren. Die Honahle 2 weist hierzu Ć¼ber den Umfang verteilt mehrere Honsteine 4 tragende Honleisten 5 auf, die in Umfangsrichtung voneinander beabstandet sind. Insofern ist die Honahle 2 herkƶmmlicher Bauart. Die Honahle 2 fĆ¼hrt zur mechanischen Feinbearbeitung der Zylinderlaufbahn 3 eine Drehbewegung entsprechend dem Pfeil 6 mit Vorschub in Richtung des Pfeils 7 aus, um eine Zylinderlaufbahn 3 mit den gewĆ¼nschten Honriefen (nicht dargestellt) herzustellen.In the single figure is shown schematically and by way of example a cylinder 1 of a crankcase of an internal combustion engine not shown here, in the cylinder bore a here also very schematically illustrated honing 2 is introduced to perform a fine machining of the cylinder bore 3 in a conventional manner. For this purpose, the honing head 2 has a plurality of honing stones 4 carrying honing stones 5 distributed over the circumference, which are spaced apart in the circumferential direction. In this respect, the Honahle 2 conventional design. The Honahle 2 performs the mechanical fine machining of the cylinder barrel 3 a rotational movement according to the arrow 6 with feed in the direction of arrow 7, to produce a cylinder liner 3 with the desired Honriefen (not shown).

Im Rahmen dieser mechanischen Hon-Feinbearbeitung mittels der Honahle 2 wird mittels einer hier lediglich ƤuƟerst schematisch dargestellten SchmiermitteldĆ¼se 8 ein Schmiermittel 9 in die Zylinderbohrung und damit auf die Zylinderlaufbahn 3 aufgebracht, was in der Figur 1 lediglich ƤuƟerst schematisch und beispielhaft dargestellt ist. Das hier zugefĆ¼hrte Schmiermittel 9 wird von einem Schmiermittelreservoir 10 abgezogen, das in der einzigen Figur ebenfalls lediglich ƤuƟerst schematisch dargestellt ist. Das Schmiermittel 9 setzt sich dabei zusammen aus einer Basis-Schmiermittelemulsion 12, in dem ein tribochemisch aktivierbares Additiv 11, zum Beispiel ein Metallsilikat, emulgiert bzw. feinstverteilt ist, so dass die Zylinderlaufbahn 3 im Rahmen der mechanischen Feinbearbeitung mittels der Honahle 2 mit dem tribochemisch aktivierbaren Additiv benetzt ist. Diese wird im weiteren Verlauf der mechanischen Honbearbeitung aufgrund des im jeweiligen Honbereich vorherrschenden hohen Anpressdrucks der Honahle 2 und der im Honbereich vorherrschenden relativ hohen Bearbeitungstemperatur aktiviert und bildet so mit dem mechanisch fein bearbeiteten OberflƤchenbereich der Zylinderlaufbahn 3 eine hier lediglich ƤuƟerst beispielhaft und schematisch eingezeichnete korrosionsbestƤndige OberflƤche 13 als Triboreaktionsschicht aus. Diese bildet einen hervorragenden innermotorischen Korrosionsschutz gegen aggressive SƤuren, Gase, Kondensate und dergleichen, wie sie insbesondere beim Betrieb von Brennkraftmaschinen mit AbgasrĆ¼ckfĆ¼hrung und schwefelhaltigem Kraftstoff entstehen kƶnnen.In the context of this honing mechanical honing 2, a lubricant 9 is applied by means of a lubricant nozzle 8 shown here only extremely schematically in the cylinder bore and thus on the cylinder bore 3, which in the FIG. 1 is shown only extremely schematically and by way of example. The supplied here lubricant 9 is withdrawn from a lubricant reservoir 10, which in the single Figure is also shown only very schematically. The lubricant 9 is composed here of a base lubricant emulsion 12, in which a tribochemically activatable additive 11, for example a metal silicate, is emulsified or finely divided, so that the cylinder liner 3 in the context of mechanical fine machining by means of the honing hone 2 with the tribochemical activatable additive is wetted. This is activated in the course of the mechanical honing due to the prevailing in the respective Honbereich high contact pressure of the honing 2 and the honing prevailing relatively high processing temperature and thus forms with the mechanically finely machined surface area of the cylinder barrel 3 here only extremely exemplary and schematically drawn corrosion-resistant surface 13 as Triboreaktionsschicht from. This forms an excellent internal engine corrosion protection against aggressive acids, gases, condensates and the like, as they may arise in particular in the operation of internal combustion engines with exhaust gas recirculation and sulfur-containing fuel.

Das KurbelgehƤuse selbst und damit die Zylinderlaufbahnen 3 sind vor deren Bearbeitung bevorzugt aus einem zum Beispiel Eisengusswerkstoff hergestellt.The crankcase itself and thus the cylinder liners 3 are preferably made of an example cast iron material prior to processing.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Zylindercylinder
22
Honahlehone
33
ZylinderlaufbahnCylinder liner
44
HonsteineHoning stones
55
Honleistenhones
66
Pfeilarrow
77
Pfeilarrow
88th
SchmiermitteldĆ¼selubricant nozzle
99
Schmiermittellubricant
1010
Schmiermittelreservoirlubricant reservoir
1111
tribochemisch aktivierbares Additivtribochemically activatable additive
1212
Basis-SchmiermittelemulsionBased lubricant emulsion
1313
korrosionsbestƤndige OberflƤchecorrosion resistant surface

Claims (8)

Verfahren zur Bearbeitung, insbesondere zur mechanischen Bearbeitung, wenigstens eines abgasfĆ¼hrenden OberflƤchenbereichs eines Brennkraftmaschinen- oder KurbelgehƤusebestandteils, insbesondere zur Bearbeitung wenigstens einer Zylinderlaufbahn eines Brennkraftmaschinen-KurbelgehƤuses oder zur Bearbeitung wenigstens einer Zylinderlaufbahn einer Zylinderlaufbuchse, mittels eines die OberflƤchenbeschaffenheit verƤndernden Bearbeitungswerkzeuges, dadurch gekennzeichnet, dass der wenigstens eine aus einem korrosionsanfƤlligen Werkstoff hergestellte abgasfĆ¼hrende OberflƤchenbereich, insbesondere wenigstens eine Zylinderlaufbahn eines KurbelgehƤuses oder einer Zylinderlaufbuchse, im Rahmen der Bearbeitung mittels des die OberflƤchenbeschaffenheit verƤndernden Bearbeitungswerkzeuges mit wenigstens einem tribochemisch aktivierbaren Stoff in Kontakt gebracht wird, der im Verlauf der Bearbeitung, insbesondere in AbhƤngigkeit von einem definierten Anpressdruck des Bearbeitungswerkzeuges und/oder einer sich wƤhrend der Bearbeitung einstellenden definierten Bearbeitungstemperatur, aktiviert wird und mit dem jeweiligen OberflƤchenbereich durch tribochemische Reaktion eine korrosionsbestƤndige OberflƤche als Triboreaktionsschicht ausbildet.Method for processing, in particular for mechanical processing, at least one exhaust-carrying surface region of an internal combustion engine or crankcase component, in particular for processing at least one cylinder bore of an internal combustion engine crankcase or for processing at least one cylinder bore of a cylinder liner, by means of a surface condition changing processing tool, characterized in that at least one exhaust-carrying surface region made of a corrosion-susceptible material, in particular at least one cylinder bore of a crankcase or a cylinder liner, is brought into contact with at least one tribochemically activatable substance during machining by means of the machining tool changing the surface condition, which in the course of the machining, in particular in dependence from a defined contact pressure of the machining tool it is activated and / or a defined during machining processing temperature, and forms with the respective surface area by tribochemical reaction, a corrosion-resistant surface as Triboreaktionsschicht. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das die OberflƤchenbeschaffenheit verƤndernde Bearbeitungswerkzeug ein mechanisches Bearbeitungswerkzeug, bevorzugt ein spanabhebendes und/oder spanendes Bearbeitungswerkzeug, hƶchst bevorzugt ein Honwerkzeug, ist, mittels dem der wenigstens eine abgasfĆ¼hrende OberflƤchenbereich, insbesondere wenigstens eine Zylinderlaufbahn, mechanisch bearbeitet und hinsichtlich der OberflƤchenbeschaffenheit verƤndert wird.A method according to claim 1, characterized in that the surface texture changing machining tool is a mechanical machining tool, preferably a machining and / or machining tool, most preferably a honing tool, by means of which the at least one exhaust-carrying surface area, in particular at least one cylinder bore, machined and is changed in terms of surface texture. Verfahren nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass der tribochemisch aktivierbare Stoff vor und/oder wƤhrend der Bearbeitung mittels des Bearbeitungswerkzeuges direkt auf die mechanisch zu bearbeitende OberflƤche aufgebracht wird und/oder als Additiv einem bei der mechanischen Bearbeitung zugefĆ¼hrtem Schmiermittel zugegeben ist.A method according to claim 1 or claim 2, characterized in that the tribochemically activatable substance is applied before and / or during processing by means of the machining tool directly on the surface to be mechanically machined and / or added as an additive to a lubricant supplied during mechanical processing. Verfahren nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass der tribochemisch aktivierbare Stoff durch wenigstens ein Metallsilikat gebildet ist.Method according to one of the preceding claims, characterized in that the tribochemically activatable substance is formed by at least one metal silicate. Verfahren nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass das KurbelgehƤuse aus einem Eisenwerkstoff hergestellt ist, insbesondere aus einem korrisionsanfƤlligen Gusseisen und/oder aus einem korrosionsanfƤlligen Stahl.Method according to one of the preceding claims, characterized in that the crankcase is made of a ferrous material, in particular of a corrosion-susceptible cast iron and / or of a corrosion-prone steel. Verfahren nach einem der vorhergehenden AnsprĆ¼che, dadurch gekennzeichnet, dass die Triboreaktionsschicht im letzten Bearbeitungsschritt vor der Fertigstellung des Bauteils hergestellt wird.Method according to one of the preceding claims, characterized in that the Triboreaktionsschicht is prepared in the last processing step before the completion of the component. Brennkraftmaschinen-KurbelgehƤuse mit wenigstens einem abgasfĆ¼hrenden OberflƤchenbereich, insbesondere mit wenigstens einer Zylinderlaufbahn, welcher OberflƤchenbereich eine durch ein Verfahren nach einem der VerfahrensansprĆ¼che 1 bis 6 gebildete korrosionsbestƤndige OberflƤche aufweist.Internal combustion engine crankcase with at least one exhaust-carrying surface area, in particular with at least one cylinder bore, which surface area has a corrosion-resistant surface formed by a method according to one of the method claims 1 to 6. Zylinderlaufbuchse mit wenigstens einer Zylinderlaufbahn, die eine durch ein Verfahren nach einem der VerfahrensansprĆ¼che 1 bis 6 gebildete korrosionsbestƤndige OberflƤche aufweist.Cylinder liner with at least one cylinder bore having a corrosion resistant surface formed by a method according to any of claims 1 to 6.
EP11005427.7A 2010-10-14 2011-07-02 Method for mechanical processing a waste gas conveying surface area of a combustion engine or crankcase component as well as combustion engine crankcase and cylinder liner Active EP2441549B1 (en)

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US10226848B2 (en) 2013-11-27 2019-03-12 Mahle Mental Leve S/A Method for the tribomechanical conditioning of a thin-walled cylinder/liner, and cylinder liner

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BRPI1107069A2 (en) 2015-11-10
US8839514B2 (en) 2014-09-23
CN102554755A (en) 2012-07-11
RU2483855C1 (en) 2013-06-10
BRPI1107069B1 (en) 2021-04-13
EP2441549B1 (en) 2021-10-13
DE102010048550A1 (en) 2012-04-19
US20120090570A1 (en) 2012-04-19
RU2011141569A (en) 2013-04-20
CN102554755B (en) 2016-07-06

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