Global Patent Index - EP 0890020 B1

EP 0890020 B1 2000-01-05 - PROCESS FOR PRODUCING CYLINDER HEADS FOR INTERNAL COMBUSTION ENGINES

Title (en)

PROCESS FOR PRODUCING CYLINDER HEADS FOR INTERNAL COMBUSTION ENGINES

Title (de)

VERFAHREN ZUR HERSTELLUNG VON ZYLINDERKÖPFEN FÜR VERBRENNUNGSMOTOREN

Title (fr)

PROCEDE DE FABRICATION DE CULASSES POUR MOTEURS A COMBUSTION INTERNE

Publication

EP 0890020 B1 (DE)

Application

EP 97916394 A

Priority

  • DE 19612500 A
  • EP 9701540 W

Abstract (en)

[origin: DE19612500A1] The description relates to a process for producing cylinder heads for internal combustion engines by pouring the liquid cylinder head material, especially aluminium, into a cylinder head mould containing a mould core (2) having stepped sections (4, 3) in the region of the valve seat ring (8) and the valve guide (7). The special feature of this process is that valve seat rings (8) and valve guides (7) are produced from a conventional material based on steel or copper by pressing and sintering in such a way that they have an open pore volume of 5 to 15 %, a valve seat (8) and/or a valve guide (7) are laid on the stepped sections (4, 3) of the mould core (2), whereafter liquid aluminium is poured into the preheated mould and the mould core (2) is removed in the conventional way after the molten aluminium (1) has solidified.

IPC 1-7 (main, further and additional classification)

F01L 3/08; F01L 3/22

IPC 8 full level (invention and additional information)

B22D 17/00 (2006.01); B22D 19/00 (2006.01); B22D 19/04 (2006.01); B22D 19/08 (2006.01); F01L 3/08 (2006.01); F01L 3/22 (2006.01); F02F 1/24 (2006.01)

CPC (invention and additional information)

F01L 3/08 (2013.01); B22D 19/0009 (2013.01); F01L 3/22 (2013.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19612500 A1 19971002; AT 188537 T 20000115; EP 0890020 A1 19990113; EP 0890020 B1 20000105; ES 2144312 T3 20000601; JP 2000507504 A 20000620; KR 20000005112 A 20000125; PT 890020 E 20000630; US 6112803 A 20000905; WO 9737107 A1 19971009

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