EP 1454037 A1 20040908 - MULTI-PIECE VALVE FOR INTERNAL COMBUSTION PISTON ENGINES

Title (en)

MULTI-PIECE VALVE FOR INTERNAL COMBUSTION PISTON ENGINES

Title (de)

GEBAUTES VENTIL FÜR HUBKOLBENMASCHINEN

Title (fr)

SOUPAPE EN PLUSIEURS PARTIES POUR MOTEURS A PISTON ALTERNATIF

Publication

EP 1454037 A1 20040908 (DE)

Application

EP 02783047 A 20021031

Priority

DE 10160942 A 20011212
EP 0212143 W 20021031

Abstract (en)

[origin: WO03050395A1] The invention relates to a multi-piece valve (1) for internal combustion piston engines, wherein the valve head (3) is connected to the valve stem (2) in such a way that it is traction and pressure resistant. The valve head (3) has an annular bearing surface (5) for a stem-sided shoulder in the region of a continuous center opening (4). The center opening (4) is enlarged on the combustion chamber side (10) of the valve head. The head-side end (13) of the valve stem (2) is plastically enlarged in such a way that said enlargement (6) is filled in a positive fit. In order to increase the service life of the connection between the valve head (3) and the valve stem, the combustion chamber side enlargement (6) of the center opening (4) and the appropriately conformed end-side enlargement of the valve stem (2) are embodied in such a way that they are non-circular, thereby resulting in positive-fit torsional fixing between the valve stem (2) and the valve head (4).

IPC 1-7

F01L 3/20; F01L 3/02

IPC 8 full level

F01L 3/02 (2006.01); F01L 3/20 (2006.01); F01L 3/24 (2006.01)

CPC (source: EP US)

F01L 3/02 (2013.01 - EP US); F01L 3/20 (2013.01 - EP US); F01L 2301/00 (2020.05 - EP US); F01L 2301/02 (2020.05 - EP US); F01L 2303/00 (2020.05 - EP US)

Citation (search report)

See references of WO 03050395A1

Designated contracting state (EPC)

DE FR IT

DOCDB simple family (publication)

WO 03050395 A1 20030619; DE 10160942 A1 20030618; EP 1454037 A1 20040908; JP 2005511961 A 20050428; US 2005076875 A1 20050414; US 6938602 B2 20050906

DOCDB simple family (application)

EP 0212143 W 20021031; DE 10160942 A 20011212; EP 02783047 A 20021031; JP 2003551406 A 20021031; US 49806404 A 20041122