EP1240959A2 - Noyau de coulée pour la chambre de refroidissement du carter de vilebrequin d'un moteur à combustion interne - Google Patents

Noyau de coulée pour la chambre de refroidissement du carter de vilebrequin d'un moteur à combustion interne Download PDF

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Publication number
EP1240959A2
EP1240959A2 EP02004816A EP02004816A EP1240959A2 EP 1240959 A2 EP1240959 A2 EP 1240959A2 EP 02004816 A EP02004816 A EP 02004816A EP 02004816 A EP02004816 A EP 02004816A EP 1240959 A2 EP1240959 A2 EP 1240959A2
Authority
EP
European Patent Office
Prior art keywords
core
crankcase
cast core
bridge
cast
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.)
Withdrawn
Application number
EP02004816A
Other languages
German (de)
English (en)
Other versions
EP1240959A3 (fr
Inventor
Benedikt Biechele
Martin Sachrau
Heinz Paschen
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 EP1240959A2 publication Critical patent/EP1240959A2/fr
Publication of EP1240959A3 publication Critical patent/EP1240959A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/24—Accessories for locating and holding cores or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/12—Accessories
    • B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • 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
    • B22C9/108—Installation of cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1824—Number of cylinders six

Definitions

  • the invention relates to a cast core for a coolant jacket of a crankcase an internal combustion engine according to the in the preamble of claim 1 mentioned type and is based on EP 0 788 855 A1.
  • the cast core represents the later coolant room for the cylinder cooling, encloses three cylinders and has on the Side facing the cylinder head via core supports, which later transfer the coolant from the crankcase into the cylinder head.
  • To fix the position Casting core in the mold during the casting process are in this on the Side of the core supports, four holes drilled in the direction of the cylinder axes. In these four holes are holding elements that are part of the mold, before the casting process is introduced and the casting core is thus in the parting plane of The crankcase and cylinder head are fixed in position in the mold.
  • the cast core has two raised Areas in the area of the cylinder wall that form fit with the mold form.
  • a disadvantage of this configuration is the great effort required to fix the position Cast core in the mold and the necessary coolant jacket thickness, the minimum must be designed as strong as the diameter of the holding elements.
  • the object of the invention is to provide an inexpensive mold with which narrow coolant jacket thicknesses can be realized and at the same time tight Dimensional tolerances are observed.
  • a cast core designed in this way can advantageously be used both for closed-deck and open-deck crankcases.
  • Closed-deck crankcase means that only the areas of the core supports in the finished crankcase act as coolant passage openings in the direction of the cylinder head.
  • the entire cross-section of the coolant jacket around the cylinders is open in the direction of the cylinder head.
  • the sealing and the determination of the size of the coolant passage openings from the coolant jacket in the crankcase to the cylinder head is carried out exclusively by the geometric design of the cylinder head gasket.
  • a cast core designed in this way can be used both for in-line engines and for engines with cylinders in a V arrangement.
  • the cast cores can be produced in one piece, for example as a sand cast core or by using metal foams.
  • An embodiment according to claim 2 allows any geometric design the bridge, since it no longer has a coolant-carrying function. So can the bridge is designed exclusively from a mechanical strength point of view to give the mold the greatest possible rigidity, despite the smallest coolant wall thickness, to rent. That means that the core of the casting is made by the Casting buoyancy forces caused by the molten metal, which on the Cast core load, is not deformed. Highest dimensional stability of the cast core and thus dimensional accuracy of the crankcase is the result. As a result, complex, subsequent mechanical post-processing steps are eliminated.
  • the bridge and the casting core according to claim 3 in one Work step. Additional holding elements are for this cast core unnecessary. The manufacturing costs are thus significantly reduced.
  • An arrangement according to claim 5 facilitates the demolding of the crankcase after the casting process from the mold.
  • the position of the casting core in the casting mold defined three-dimensionally.
  • the cast core is easy to use in the mold and narrow Tolerances are observed.
  • Fig. 1 shows a cast core 1 for a coolant jacket of a crankcase Reciprocating internal combustion engine with six cylinders 2, 2 ', the two rows of cylinders 10, 10 'form in a V arrangement.
  • the cast core 1 consists of a coolant pump interior 6, a main channel 7, six, in which the cylinders 2, 2 'formed V arranged risers 8, 8' and six ring channels 9, 9 ', the are arranged around a cylinder 2, 2 '. On each riser 8, 8 'and on each ring channel 9, 9 ', is in the direction of a cylinder head, not shown end of a core support 3, 3 'formed.
  • the coolant When the internal combustion engine is operating, the coolant is supplied by a coolant, not shown Coolant pump from the coolant pump interior 6, into the main channel 7 conveyed and from there via the riser channels 8, 8 'further into the ring channels 9, 9 '. Through the risers 8, 8 ', the coolant is further into a not shown Cylinder head transported and then returned to the coolant pump.
  • the Coolant flow directions in the coolant jacket are shown schematically by arrows shown.
  • the mold 1 shown here is made of a quartz sand bonded with synthetic resin manufactured.
  • synthetic resin manufactured.
  • other materials for example with a Binder-bound glass grains or metal foams or sintered oxide ceramics, can be used like aluminum or zirconium oxide.
  • the cast core 1 After the cast core 1 has been produced in one piece, it is not converted into one shown, two-part mold inserted that the bridges 4, 4 'in the mold parting plane rest on the lower mold half and from the upper mold half be held in place. As a result, the casting core 1 while the casting process when high pressures through the molten metal onto the casting core 1 act, torsionally rigid, fixed to the mold parting plane.
  • the axial Core support 5 forms a positive connection with the upper mold half and fixes the Cast core 1 in the plane of the mold parting plane.
  • This configuration means that the core wall thicknesses are a few millimeters possible, even in the critical area between the individual cylinders 2, 2 '.
  • the bridges 4, 4 ' which are designed in the form of strips in the exemplary embodiment, can however, depending on the required mechanical stability in other cross sections be formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP02004816A 2001-03-14 2002-03-02 Noyau de coulée pour la chambre de refroidissement du carter de vilebrequin d'un moteur à combustion interne Withdrawn EP1240959A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10112135 2001-03-14
DE2001112135 DE10112135A1 (de) 2001-03-14 2001-03-14 Gusskern für den Kühlmittelmantel eines Kurbelgehäuses einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1240959A2 true EP1240959A2 (fr) 2002-09-18
EP1240959A3 EP1240959A3 (fr) 2003-02-05

Family

ID=7677344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02004816A Withdrawn EP1240959A3 (fr) 2001-03-14 2002-03-02 Noyau de coulée pour la chambre de refroidissement du carter de vilebrequin d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1240959A3 (fr)
DE (1) DE10112135A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10099277B2 (en) 2015-03-04 2018-10-16 Rolls-Royce Plc Core for an investment casting process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03184654A (ja) * 1989-12-05 1991-08-12 Farley Inc エンジンブロックのシリンダ用崩壊性砂中子
EP0585136A1 (fr) * 1992-08-28 1994-03-02 Ryobi Ltd. Assemblage bloc cylindre pour un moteur à combustion interne à refroidissement liquide
EP0597050A1 (fr) * 1992-04-01 1994-05-18 Doehler Jarvis Lp Noyau a cadre de retrait destine a un moule et ses coulees.
EP0788855A1 (fr) * 1996-02-09 1997-08-13 Ryobi Ltd. Appareil et noyau pour la coulée des blocs-cylindres du type "closed deck"

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT388319B (de) * 1987-08-20 1989-06-12 Avl Verbrennungskraft Messtech Giesskern fuer den wassermantel eines zylinderblockes einer mehrzylinder-hubkolben-brennkraftmaschine
DE3812471A1 (de) * 1988-04-14 1989-11-02 Bayerische Motoren Werke Ag Giesskern eines kurbelgehaeuses
US5119881A (en) * 1990-03-07 1992-06-09 Navistar International Transportation Corp. Cylinder head casting core assembly and method
DE19723343C1 (de) * 1997-06-04 1998-10-29 Vaw Mandl & Berger Gmbh Zylinderkopf mit gegossenen Kühlwasserkanälen sowie Verfahren und Gießkerne zu seiner Herstellung
DE29924794U1 (de) * 1998-07-21 2005-09-08 Hydro Aluminium Alucast Gmbh Gießform für die Herstellung eines Motorblocks
DE19950238A1 (de) * 1999-10-19 2001-05-17 Nagelschmiede Und Metallwaren Kernstütze

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03184654A (ja) * 1989-12-05 1991-08-12 Farley Inc エンジンブロックのシリンダ用崩壊性砂中子
EP0597050A1 (fr) * 1992-04-01 1994-05-18 Doehler Jarvis Lp Noyau a cadre de retrait destine a un moule et ses coulees.
EP0585136A1 (fr) * 1992-08-28 1994-03-02 Ryobi Ltd. Assemblage bloc cylindre pour un moteur à combustion interne à refroidissement liquide
EP0788855A1 (fr) * 1996-02-09 1997-08-13 Ryobi Ltd. Appareil et noyau pour la coulée des blocs-cylindres du type "closed deck"

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 17, 5. Juni 2001 (2001-06-05) & JP 03 184654 A (FARLEY INC), 12. August 1991 (1991-08-12) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10099277B2 (en) 2015-03-04 2018-10-16 Rolls-Royce Plc Core for an investment casting process

Also Published As

Publication number Publication date
EP1240959A3 (fr) 2003-02-05
DE10112135A1 (de) 2002-10-02

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