EP 2920448 A2 20150923 - PISTON FOR AN INTERNAL COMBUSTION ENGINE
Title (en)
PISTON FOR AN INTERNAL COMBUSTION ENGINE
Title (de)
KOLBEN FÜR EINEN VERBRENNUNGSMOTOR
Title (fr)
PISTON POUR UN MOTEUR À COMBUSTION INTERNE
Publication
Application
Priority
- DE 102012017217 A 20120831
- DE 2013000491 W 20130827
Abstract (en)
[origin: WO2014032644A2] The invention relates to a piston (10) for an internal combustion engine, comprising a piston head (11) and a piston skirt (21), wherein said piston head (11) comprises a piston base (13), a circumferential ring part (16) and, in the region of the ring part (16), a circumferential closed cooling channel or sealed cavity (18). An inner side (12) of the piston (10) comprises two lower surfaces (34a, 34b) which transform continuously in the region of the piston central axis (M) to form an arched surface (35). Said piston skirt (21) comprises piston hubs (22) provided with hub bores (23) which are interconnected by means of running surfaces (24, 25) which comprise inner surfaces (32a, 32b) facing the inside of the piston. The invention is characterised in that starting from the free ends of the piston skirt (21), inside the piston on the pressure side (DS) and/or counter pressure side (GDS), an inner surface (32a, 32b) of a running surface (24, 25) continuously transforms into a guiding surface (33a, 33b) for a coolant which transforms continuously on the side thereof into a lower surface (34a, 34b).
IPC 8 full level
CPC (source: CN EP US)
F01P 3/10 (2013.01 - US); F02F 3/0015 (2013.01 - US); F02F 3/0084 (2013.01 - US); F02F 3/18 (2013.01 - CN EP US); F02F 3/22 (2013.01 - CN EP US); F01P 2003/006 (2013.01 - US)
Citation (search report)
See references of WO 2014032644A2
Citation (examination)
JP H04265451 A 19920921 - SUZUKI MOTOR CO
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2014032644 A2 20140306; WO 2014032644 A3 20140424; BR 112015004341 A2 20170704; CN 104641094 A 20150520; DE 102012017217 A1 20140515; EP 2920448 A2 20150923; JP 2015526643 A 20150910; US 2015247475 A1 20150903; US 9765728 B2 20170919
DOCDB simple family (application)
DE 2013000491 W 20130827; BR 112015004341 A 20130827; CN 201380045466 A 20130827; DE 102012017217 A 20120831; EP 13771044 A 20130827; JP 2015528871 A 20130827; US 201314424706 A 20130827