EP2349610A1 - Positioning surfaces on a gas exchange channel rake - Google Patents
Positioning surfaces on a gas exchange channel rakeInfo
- Publication number
- EP2349610A1 EP2349610A1 EP09778569A EP09778569A EP2349610A1 EP 2349610 A1 EP2349610 A1 EP 2349610A1 EP 09778569 A EP09778569 A EP 09778569A EP 09778569 A EP09778569 A EP 09778569A EP 2349610 A1 EP2349610 A1 EP 2349610A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas exchange
- rake
- cylinder head
- stops
- channel rake
- 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
Links
- 238000005266 casting Methods 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 abstract description 3
- 241000237858 Gastropoda Species 0.000 description 2
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
Definitions
- the invention relates to a gas exchange duct rake as part of a casting mold for a cylinder head of an internal combustion engine, wherein the gas exchange duct rake is assembled with other core parts and lower box and upper box to the mold, and wherein the Gascickanal- rake for a Clearancebearbeitung positioning surfaces.
- Such positioning surfaces on the gas exchange channel rake of a cylinder head of an internal combustion engine are known and used in order to position the cast cylinder head blank more or less defined for the so-called adjustment or initial receiving processing.
- this processing then, starting from the positioning surfaces, for example, a surface of the cylinder head blank is processed, in which case this surface is the base surface for further processing.
- the invention has for its object to select the positioning of a Gas monocytes and to order that a reliable and accurate positioning of a positioning device for the Motherboardbearbeitung is achieved.
- the positioning surfaces are three height stops, two transverse stops and a longitudinal stop.
- the positioning is removed and, starting from the already processed surfaces and / or holes, the other necessary processing of the cylinder head are made in particular in the area that could not be processed by the initially mounted positioning.
- This includes, for example, the manufacture of the recesses for receiving the valve seat rings. It is clear that their position relative to the gas exchange channels for the swirl behavior of the cylinder head are particularly important.
- the height stops in the form of a tripod are arranged distributed on the gas exchange channel rake in the form that two height stops in the region of Ventil Operationss- are arranged by different inlet channel rake teeth and the third height stop is arranged on a cylinder head side wall end of another inlet channel rake tooth.
- This arrangement of height stops ensures an exact height positioning of the positioning.
- two of the height stops are arranged in the region of valve guide studs, it is ensured that there is no influence on the flow path of the combustion air through the finished inlet duct in comparison to the further inlet duct rake.
- the outlet channel rake teeth can also be used for positioning in the manner shown.
- the two height stops are arranged on outer inlet channel rake teeth, and the third height stop is arranged on a further inlet channel rake tooth arranged between the outer inlet channel rake teeth.
- the transverse stops are arranged at least on two outer inlet channel rake teeth. This is the best place for the exact alignment of the positioning.
- a transverse stop may also be present at the other inlet channel rake teeth. This ensures that all of the injection channel rake teeth are of the same design in this important area for the flow pattern of the combustion air.
- the transverse stops can be arranged in the region next to the valve guide slugs or else be arranged in the region of the cylinder head bottom ends of the inlet channel rake teeth. In particular, in the latter case, transverse stops can be provided on each of the inlet channel rake teeth. This is particularly the case when the transverse stops are not arranged in a casting area, which is machined later in the processing of the valve seat receiving surfaces, so that fluidly uniform channels arise.
- the longitudinal stop is arranged in the region adjacent to the valve guide or at a cylinder head bottom side end of an intake passage rake tooth.
- (non-functional) longitudinal stops for ensuring a uniform flow behavior can also be arranged on the other inlet channel rake teeth; in particular if the longitudinal stop (s) are not arranged in a casting area which is later machined during the machining of the valve seat receiving surfaces.
- Fig. 2 shows a second variant of a Gas monocytes, wherein the transverse stops are arranged as part of the positioning at another location.
- the gas exchange duct rake 1 which is shown incompletely in the figures, is intended for the casting mold of a four-cylinder two-valve cylinder head. Not shown is the fauxhaltende the individual channel rake Maussteii, which is arranged at the zyiinderkopf receivingwandigen end 6 of the channel rake teeth. At this connection part, both the intake passage rake teeth 2 and the exhaust passage rake teeth 3 are mounted. This connecting part connects the channel rake teeth outside of the (finished) cylinder head.
- the gas exchange channel rake is positioned defined in the casting mold together with the other core parts.
- the crude cylinder head must be further processed and, for example, recesses for receiving valve seat rings must be machined precisely fitting with respect to the inlet ducts.
- a positioning device is used in the gas exchange channels and, starting from defined reference points of the positioning device, quasi an adjustment or Clearancebearbeitung made of certain surfaces and / or holes on the cylinder head. Starting from this Justage- or Clearagebearbeitung then the recesses for the valve seat rings can be made.
- height stops 4a, 4d are arranged in the region of Ventil Evaluationsbutzen 5 and a third height stop 4b is at one in between lying inlet channel rake tooth 2b attached to the cylinder head sidewall end 6.
- the height stops 4a, 4b, 4d form a tripod and ensure a secure positioning of the positioning.
- Transverse stops 7a, 7d are in turn arranged on the outer inlet channel rake teeth 2a, 2d, namely on their cylinder head base side ends.
- a longitudinal stopper 8 is disposed at the cylinder head side end of the intake passage rake tooth 2c. Both the transverse stops 7a, 7b and the longitudinal stop 8 lie in a region of the finished cylinder head, in which a machining operation is carried out to create receiving recesses for valve seat rings.
- the transverse stops 7a 7d * (which cooperate with corresponding counterparts) and the longitudinal stop 8 'are arranged in the area adjacent to the guide slugs 5 of the inlet channel rake teeth 2a, 2c and 2d.
- This area is not flow-influencing for the combustion air. But it can also be on all inlet channel rake teeth 2 both transverse stops 7 ' and longitudinal stops 8 ' may be present when a (small) flow control is to be assumed.
- Combined arrangements according to FIGS. 1 and 2 can also be realized within the scope of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810049527 DE102008049527A1 (en) | 2008-09-29 | 2008-09-29 | Positioning surfaces on a gas exchange duct rake |
PCT/EP2009/006711 WO2010034426A1 (en) | 2008-09-29 | 2009-09-17 | Positioning surfaces on a gas exchange channel rake |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2349610A1 true EP2349610A1 (en) | 2011-08-03 |
EP2349610B1 EP2349610B1 (en) | 2016-05-04 |
Family
ID=41572542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09778569.5A Active EP2349610B1 (en) | 2008-09-29 | 2009-09-17 | Positioning surfaces on a gas exchange channel rake core |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2349610B1 (en) |
DE (1) | DE102008049527A1 (en) |
ES (1) | ES2585570T3 (en) |
WO (1) | WO2010034426A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114535511A (en) * | 2022-03-09 | 2022-05-27 | 广西玉柴机器股份有限公司 | Core assembly positioning device and method for improving consistency of air passages of cylinder cover |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5119881A (en) * | 1990-03-07 | 1992-06-09 | Navistar International Transportation Corp. | Cylinder head casting core assembly and method |
DE19542492C1 (en) * | 1995-11-15 | 1997-01-16 | Daimler Benz Ag | Liquid-cooled cylinder head for a multi-cylinder internal combustion engine |
DE19655020C2 (en) * | 1996-12-20 | 2000-03-23 | Daimler Chrysler Ag | Method for the first reception of a cast blank of a cylinder head for internal combustion engines |
US6527040B2 (en) * | 2001-06-11 | 2003-03-04 | General Motors Corporation | Casting of engine blocks |
US6527039B2 (en) * | 2001-06-11 | 2003-03-04 | General Motors Corporation | Casting of engine blocks |
US6615901B2 (en) * | 2001-06-11 | 2003-09-09 | General Motors Corporation | Casting of engine blocks |
ATE297830T1 (en) * | 2002-12-09 | 2005-07-15 | Boehringer Werkzeugmaschinen | DEVICE AND METHOD FOR ALIGNING THE ANGLE POSITION OF ECCENTRIC PARTS SUCH AS CRANKSHAFTS USING ALIGNMENT JAWS ON A steadiness |
DE10339653A1 (en) * | 2003-08-28 | 2005-03-24 | Deutz Ag | Casting core minimized cylinder head |
DE102004034524A1 (en) * | 2004-07-16 | 2006-02-16 | Deutz Ag | Cast cylinder head with cooling channel for internal combustion engine has crankcase and the cooling channels formed during the casting process |
DE102006026131B4 (en) * | 2006-06-03 | 2018-12-20 | Daimler Ag | Method for producing a cylinder head for a liquid-cooled internal combustion engine |
-
2008
- 2008-09-29 DE DE200810049527 patent/DE102008049527A1/en not_active Ceased
-
2009
- 2009-09-17 ES ES09778569.5T patent/ES2585570T3/en active Active
- 2009-09-17 WO PCT/EP2009/006711 patent/WO2010034426A1/en active Application Filing
- 2009-09-17 EP EP09778569.5A patent/EP2349610B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2010034426A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114535511A (en) * | 2022-03-09 | 2022-05-27 | 广西玉柴机器股份有限公司 | Core assembly positioning device and method for improving consistency of air passages of cylinder cover |
Also Published As
Publication number | Publication date |
---|---|
WO2010034426A1 (en) | 2010-04-01 |
DE102008049527A1 (en) | 2010-04-01 |
EP2349610B1 (en) | 2016-05-04 |
ES2585570T3 (en) | 2016-10-06 |
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