Global Patent Index - EP 2561205 B1

EP 2561205 B1 20200923 - PISTON UPPER PART OF AN ASSEMBLED OR WELDED PISTON WITH EXTENDED COOLING SPACES

Title (en)

PISTON UPPER PART OF AN ASSEMBLED OR WELDED PISTON WITH EXTENDED COOLING SPACES

Title (de)

KOLBENOBERTEIL EINES GEBAUTEN ODER GESCHWEIßTEN KOLBENS MIT ERWEITERTEN KÜHLRÄUMEN

Title (fr)

PARTIE SUPÉRIEURE D'UN PISTON ASSEMBLÉ OU SOUDÉ COMPRENANT DES CHAMBRES DE REFROIDISSEMENT ÉLARGIES

Publication

EP 2561205 B1 20200923 (DE)

Application

EP 11703395 A 20110204

Priority

  • DE 102010015568 A 20100419
  • EP 2011000505 W 20110204

Abstract (en)

[origin: WO2011131266A1] The invention relates to a piston of an internal combustion engine, configured as a preferably assembled or welded liquid-cooled piston which consists of a piston lower part and a piston upper part (1) which has a combustion-chamber recess (7). These piston components are supported via joining lands (2, 3) which are spaced apart radially from one another and together form a dividing plane (4), and are joined together preferably with a material-to-material fit, preferably by means of a welded joint, or preferably frictionally, preferably by means of a screw connection. In order to receive piston rings, the piston upper part (1) comprises a ring area (10) and includes an annular cooling channel (11) which extends as far as into the piston lower part and is connected to an inner cooling space (16) via connecting channels (15). The cooling channel is adjoined by recesses (12) which are oriented in the direction of a piston head (6), are configured as a blind hole and are designed such that they are widened conically starting from the cooling channel (11) as far as a recess bottom (14) of the respective recess (12). The recess bottom (14) can be of pronounced undulating (enlarged surface) or finely undulating configuration. The piston can also be configured as a single-piece piston with a piston upper part (1) and a piston lower part without a dividing plane (4).

IPC 8 full level

F02F 3/00 (2006.01); F02F 3/22 (2006.01)

CPC (source: EP KR US)

B22C 9/105 (2013.01 - EP US); F02F 3/003 (2013.01 - EP KR US); F02F 3/02 (2013.01 - KR); F02F 3/16 (2013.01 - KR); F02F 3/22 (2013.01 - EP US); F02F 3/225 (2013.01 - EP US); Y10T 29/49231 (2015.01 - EP US); Y10T 29/49249 (2015.01 - EP US); Y10T 29/49252 (2015.01 - EP US); Y10T 29/49256 (2015.01 - EP US)

Citation (examination)

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

DOCDB simple family (publication)

DE 102010015568 A1 20111020; CN 102859165 A 20130102; CN 102859165 B 20190514; EP 2561205 A1 20130227; EP 2561205 B1 20200923; KR 101867631 B1 20180614; KR 20130062904 A 20130613; US 2013032104 A1 20130207; US 8973548 B2 20150310; WO 2011131266 A1 20111027

DOCDB simple family (application)

DE 102010015568 A 20100419; CN 201180014411 A 20110204; EP 11703395 A 20110204; EP 2011000505 W 20110204; KR 20127026972 A 20110204; US 201113642001 A 20110202