WO2018114022A1 - Procédé de production d'une culasse et culasse - Google Patents

Procédé de production d'une culasse et culasse Download PDF

Info

Publication number
WO2018114022A1
WO2018114022A1 PCT/EP2017/001151 EP2017001151W WO2018114022A1 WO 2018114022 A1 WO2018114022 A1 WO 2018114022A1 EP 2017001151 W EP2017001151 W EP 2017001151W WO 2018114022 A1 WO2018114022 A1 WO 2018114022A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder head
valve seat
flow
producing
cooling channels
Prior art date
Application number
PCT/EP2017/001151
Other languages
German (de)
English (en)
Inventor
Janusz Kwiatkowski
Original Assignee
Daimler 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 Daimler Ag filed Critical Daimler Ag
Publication of WO2018114022A1 publication Critical patent/WO2018114022A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F01P3/14—Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves

Definitions

  • the invention relates to a method for producing a cylinder head for a
  • Another aspect of the invention relates to a cylinder head for an internal combustion engine.
  • respective cylinder heads of the internal combustion engines are often produced by a casting process.
  • Such casting methods enable a particularly high production rate with simultaneously low production costs.
  • valve seat rings limit respective cooling channels of the internal combustion engine, whereby the valve seat rings outside contact directly with one, the cooling channels
  • a valve seat ring provided here has cavities through which coolant can flow, wherein the valve seat is formed by a valve seat ring which can be inserted into a recess at the mouth of the inlet channel or outlet channel in the cylinder head.
  • the valve seat encloses an annular flow channel together with the recess.
  • Object of the present invention is to provide a method and a cylinder head of the type mentioned, which allow a needs-based and easily predetermined flow of cooling channels with coolant. This object is achieved by a method having the features of patent claim 1 and by a cylinder head having the features of patent claim 4.
  • Internal combustion engine comprises at least the following steps:
  • Valve seat areas of the cylinder head body respective, at least partially circumferential in the circumferential direction around the valve seat areas
  • Cooling channels for guiding coolant, produced and in each case by means of at least one, from a radially outer wall of the respective
  • the respective web elements which initially close the respective cooling channels, can be provided with the defined and particularly precisely producible throughflow opening when the respective web regions are removed.
  • the respective flow-through openings can be produced, for example, by machining and thus material-removing machining, in which the web areas can be removed from the respective web elements, for example in the circumferential direction.
  • the invention is based on the finding that the production of the
  • Cylinder head body by casting although particularly cost-effective and can be done quickly, but in casting generally increased finished ungstoleranzen, for example, by the occurrence of material shrinkage, can occur.
  • the cooling channels after casting of the cylinder head body may each have different cooling channel diameter.
  • Throughflow openings are made with a particularly precise opening cross-section, thereby providing a defined throttle point in the cooling channel, so to speak can be. By making the flow openings is thus a
  • Cylinder head body at the respective valve seat areas in each case at least two, the respective cooling channel occlusive and mutually circumferentially offset web elements made. This is advantageous because by producing the in
  • Valve seat openings are therefore simplified. Another advantage is that at the at least two web elements also respective, different from each other
  • Web areas can be removed, whereby each of the two web elements each flow openings can be made with mutually different opening cross-section.
  • different throttle points in the form of the respective flow openings
  • Flow rates of the respective cooling channels flowing through the coolant can be adjusted. This allows the production of cooling channels with locally
  • Another aspect of the invention relates to a cylinder head for a
  • inventive method are also to be regarded as advantageous embodiments and preferred embodiments of the cylinder head according to the invention and vice versa.
  • Fig. 1 is a sectional view of a portion of a cylinder head body
  • Fig. 2 is a sectional view of a portion of a cylinder head.
  • Fig. 1 shows a cylinder head body 12 of a fragmentary in Fig. 2
  • the cylinder head 10 is produced by the
  • Cylinder head body 12 is first cast as part of a casting process. In the casting process are at different valve seat areas 20, 50 of the
  • Cylinder head body 12 respectively, at least partially in the circumferential direction 22, 52 around the valve seat portions 20, 50 surrounding Kuhlkanäle 24, 54 made for guiding coolant.
  • the valve seat portion 20 may be provided, for example, for an intake valve of the internal combustion engine and the valve seat portion 50
  • valve seat areas 20, 50 can be provided, for example, for one exhaust valve each.
  • At least two web elements 32, 34, 62, 64 which close off the respective cooling channel 24, 54 and are offset relative to one another in the respective circumferential direction 22, 52 are produced on the respective valve seat regions 20, 50.
  • the respective web elements extend away from a radially outer wall 26, 56 of the respective cooling channel 24, 54 and up to a respective valve seat opening 28, 58 for receiving a respective valve seat ring 30, 60.
  • the respective cooling channels 24, 54 are opened by removing respectively at least one land portion 36, 38, 66, 68 of the respective, at least one stem member 32, 34, 62, 64 and thereby manufacturing respectively, the respective cooling channels 24, 54 for a flow with coolant releasing, respective flow opening 40, 42, 70, 72 takes place.
  • the respective cooling channels 24, 54 locally different
  • Heat transfers can allow at least two of the respective
  • Fig. 2 shows a detail of the respective valve seat rings 30, 60, which are inserted into the respective valve seat openings 28, 58.
  • the respective valve seat rings 30, 60 delimit the respective cooling channels 24, 54 at least regionally, so that the coolant flowing through the respective cooling channels 24, 54 can come into direct contact with the respective valve seat rings 30, 60, whereby a particularly effective cooling of the valve seat rings 30, 60 is possible.
  • the present invention enables a particularly uniform and needs-based cooling of the respective valve seat rings 30, 60, which are received in the respective valve seat openings 28, 58.
  • Throttling points are created. It can thus be achieved that the respective valve seat rings 30, 60 are flushed directly to the respective valve seat regions 20, 50, for example in each case uniformly and with the best possible cooling and with a high flow velocity of the coolant. This can be contributed in an advantageous manner that in internal combustion engines with such produced
  • Cylinder heads 10 as low as possible component temperatures, in particular in the area of the valve seat rings 30, 60 can be achieved. This helps with that
  • the present invention enables a cost-effective, efficient, even and over all cylinders and over all valve seat areas 20, 50 evenly distributed, precise and mass production cooling.
  • the cylinder head 10 is mostly made by casting the cylinder head body 12, i.
  • the cylinder head body 12 can be precast and thus
  • the present invention also allows, with very little effort, a reduction in the thermal load, for example, of exhaust valves,
  • the respective cooling channels 24, 54 as well as the respective web elements 32, 34, 62, 64 can be initially cast, wherein the respective web elements 32, 34, 62, 64 can each represent webs with a minimum cast wall thickness. These webs can be machined, for example with a milling cutter to a desired flow cross section by removing the respective web portions 36, 38, 66, 68 and thereby the respective flow openings 40, 42, 70, 72 are provided. Since the web elements 32, 34, 62, 64 can extend only over a small portion in the respective circumferential direction 22, 52 along the respective cooling channels 24, 54, an overall short processing time (for example, a short milling time) with low chip formation and the Possibility of producing a defined flow cross-section given.
  • an overall short processing time for example, a short milling time
  • Valve seat portions of the cylinder head body 12 are applied, although in the present case and only the processing with reference to the two valve seat portions 20, 50 has been explained.
  • a pressure or a flow velocity of the coolant can be set slightly lower than at the first cylinder or first valve in the direction of flow at a cylinder of the internal combustion engine which is the rearmost in the flow direction of the coolant.
  • the flow cross-section so at least some of respective flow openings 40, 42, 70, 72 are selected to be greater than on the first cylinder.

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)

Abstract

L'invention concerne un procédé de production d'une culasse (10). Selon le procédé, une coulée d'un corps de base de culasse (12) a tout d'abord lieu, pendant laquelle des canaux de refroidissement (24, 54) respectifs s'étendant au moins dans certaines zones dans la direction périphérique (22, 52) autour de zones de siège de soupape (20, 50) sont produits sur différents zones de siège de soupape (20, 50) du corps de base de culasse (12) et sont fermés respectivement au moyen d'au moins un élément de liaison (32, 34, 62, 64) s'étendant à partir d'une paroi (26, 56) radialement extérieure du canal de refroidissement (24, 54) respectif et jusqu'à une ouverture de siège de soupape (28, 58) respective. Ensuite, une production de la culasse (10) à partir du corps de base de culasse (12) a lieu, par le fait que les canaux de refroidissement (24, 54) respectifs sont ouverts et un retrait d'au moins une zone de liaison (36, 38, 66, 68) dudit au moins un élément de liaison (32, 34, 62, 64) respectif a lieu et par conséquent une production d'une ouverture d'écoulement (40, 42, 70, 72) respective dégageant les canaux de refroidissement (24, 54) respectifs pour un écoulement de fluide de refroidissement est effectuée.
PCT/EP2017/001151 2016-12-22 2017-09-27 Procédé de production d'une culasse et culasse WO2018114022A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016015289.3 2016-12-22
DE102016015289.3A DE102016015289A1 (de) 2016-12-22 2016-12-22 Verfahren zur Herstellung eines Zylinderkopfes und Zylinderkopf

Publications (1)

Publication Number Publication Date
WO2018114022A1 true WO2018114022A1 (fr) 2018-06-28

Family

ID=60043136

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/001151 WO2018114022A1 (fr) 2016-12-22 2017-09-27 Procédé de production d'une culasse et culasse

Country Status (2)

Country Link
DE (1) DE102016015289A1 (fr)
WO (1) WO2018114022A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576727A1 (de) 1967-11-22 1970-06-18 Kloeckner Humboldt Deutz Ag Zylinderkopf fuer eine fluessigkeitsgekuehlte ventilgesteuerte Brennkraftmaschine
DE3205676A1 (de) 1981-02-19 1982-09-09 List, Hans, Prof. Dipl.-Ing. Dr.Dr.h.c., 8020 Graz Gekuehlter ventilsitz fuer ein- und auslassventile von brennkraftmaschinen
WO2003100237A1 (fr) * 2002-05-23 2003-12-04 Daimlerchrysler Ag Culasse de moteur a combustion interne
DE102014100841A1 (de) * 2013-01-29 2014-07-31 Avl List Gmbh Zylinderkopf für eine Brennkraftmaschine
DE102014014357A1 (de) * 2014-09-27 2016-03-31 Daimler Ag Gehäuse einer Verbrennungskraftmaschine und Verfahren zum Herstellen eines Gehäuses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576727A1 (de) 1967-11-22 1970-06-18 Kloeckner Humboldt Deutz Ag Zylinderkopf fuer eine fluessigkeitsgekuehlte ventilgesteuerte Brennkraftmaschine
DE3205676A1 (de) 1981-02-19 1982-09-09 List, Hans, Prof. Dipl.-Ing. Dr.Dr.h.c., 8020 Graz Gekuehlter ventilsitz fuer ein- und auslassventile von brennkraftmaschinen
WO2003100237A1 (fr) * 2002-05-23 2003-12-04 Daimlerchrysler Ag Culasse de moteur a combustion interne
DE102014100841A1 (de) * 2013-01-29 2014-07-31 Avl List Gmbh Zylinderkopf für eine Brennkraftmaschine
DE102014014357A1 (de) * 2014-09-27 2016-03-31 Daimler Ag Gehäuse einer Verbrennungskraftmaschine und Verfahren zum Herstellen eines Gehäuses

Also Published As

Publication number Publication date
DE102016015289A1 (de) 2018-06-28

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