Global Patent Index - EP 1004765 A1

EP 1004765 A1 20000531 - Clyinder head structure of internal combustion engines for mitigating thermal stress

Title (en)

Clyinder head structure of internal combustion engines for mitigating thermal stress

Title (de)

Zylinderkopfvorrichtung einer Brennkraftmaschine zur thermischen Spannungsverminderung

Title (fr)

Dispositif de culasse de moteur à explosion pour diminuer les contraintes thermiques

Publication

EP 1004765 A1 (EN)

Application

EP 99123425 A

Priority

JP 33381898 A

Abstract (en)

A cylinder head (2) of an internal combustion engine is connected to a cylinder block (11) that has a cylinder bore (13). A bottom surface (2a) faces the cylinder block (11). The bottom surface (2a) has two ceiling surfaces (6). The ceiling surfaces (6) and the cylinder bore (13) define a combustion chamber (15). A slit (16) is formed on the bottom surface (2a) adjacent the ceiling surface (6) to mitigate thermal stress in the cylinder head (2). The slit (16) has a deepest part (16a) located near a center of the ceiling surfaces (6). The depth of the slit (16) decreases as the distance from the maximum depth part (16a) increases. The slit (16) is separated from other spaces in the cylinder head (2). This cylinder head structure sufficiently mitigates thermal stress and maintains the strength of the cylinder head (2). <IMAGE>

IPC 1-7

F02F 1/38

IPC 8 full level

F02F 1/24 (2006.01); F02F 1/42 (2006.01); F02B 3/06 (2006.01)

CPC (source: EP)

F02F 1/4214 (2013.01); F02B 3/06 (2013.01); F02B 2275/18 (2013.01); F02F 2001/245 (2013.01); F02F 2001/248 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 1004765 A1 20000531; JP 2000161128 A 20000613

DOCDB simple family (application)

EP 99123425 A 19991124; JP 33381898 A 19981125