EP 0132505 A3 19860917 - CYLINDER HEAD MADE OF A FERROUS MATERIAL

Title (en)

CYLINDER HEAD MADE OF A FERROUS MATERIAL

Publication

EP 0132505 A3 19860917 (DE)

Application

EP 84103938 A 19840409

Priority

DE 3327168 A 19830728

Abstract (en)

[origin: EP0132505A2] 1. A cylinder head (1) made of a ferrous material, especially grey cast iron, for a valve-controlled internal combustion engine, the cylinder head having valve apertures (2, 3), each of which is provided with a valve seat (6), for at least one each inlet and outlet valve, in which at least the valve web region (13) located in the cylinder head's bottom between the valve apertures (2, 3) is surface-hardened, characterized in that the cylinder head's bottom region forming the valve seats (6) is surface-hardened, that each hardened valve seat zone (8) merges into the hardened valve web zone (7), and in that the depth of hardening of at least the hardened valve web zone (7) is equivalent to between 0.1 and 0.2 times the distance (A) between the cylinder head bottom (4) and a coolant chamber (10) arranged between the valve apertures (2, 3).

IPC 1-7

F02F 1/32; F01L 3/22; F02F 1/38

IPC 8 full level

F01L 3/22 (2006.01); F02F 1/32 (2006.01); F02F 1/38 (2006.01); F02B 3/06 (2006.01); F02F 1/24 (2006.01)

CPC (source: EP)

F02F 1/32 (2013.01); F02F 1/38 (2013.01); F02B 3/06 (2013.01); F02F 2001/247 (2013.01); F02F 2001/248 (2013.01)

Citation (search report)

[Y] DE 1035179 B 19580731 - SAVIEM, et al
[Y] CH 450061 A 19680115 - DAVEY PAXMAN & COMPANY LIMITED [GB]
[A] DE 1576366 A1 19700416 - PAXMAN & CO LTD DAVEY
[A] FR 1039512 A 19531007 - DAIMLER BENZ AG
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 50 (M-62)[722], 9. April 1981; & JP-A-56 006 045 (YANMAR) 22.01.1981
PATENT ABSTRACTS OF JAPAN, Band 2, Nr. 18 (M-77)[7212], 7. Februar 1978; & JP-A-52 134 910 (KUBOTA TEKKO) 11.11.1977

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0132505 A2 19850213; EP 0132505 A3 19860917; EP 0132505 B1 19880713; DE 3327168 A1 19850207; DE 3472700 D1 19880818

DOCDB simple family (application)

EP 84103938 A 19840409; DE 3327168 A 19830728; DE 3472700 T 19840409