Global Patent Index - EP 2478191 B1

EP 2478191 B1 20150617 - CAMSHAFT WITH VARIABLE VALVE OPENING DURATION

Title (en)

CAMSHAFT WITH VARIABLE VALVE OPENING DURATION

Title (de)

NOCKENWELLE MIT VARIIERBARER VENTILÖFFNUNGSDAUER

Title (fr)

ARBRE À CAMES À DURÉE VARIABLE D'OUVERTURE DE SOUPAE

Publication

EP 2478191 B1 20150617 (DE)

Application

EP 10747593 A 20100824

Priority

  • DE 102009041426 A 20090916
  • EP 2010005181 W 20100824

Abstract (en)

[origin: WO2011032632A1] The invention relates to a camshaft for an internal combustion engine, comprising a hollow outer shaft (2) and an inner shaft (4) which is concentrically mounted inside the outer shaft (2) to be rotatable about an angle (a) and a multi-part cam element (6) having a first cam section (61) that is mounted on the outer shaft (2) in a rotationally fixed manner and a second cam section (62) that is connected to the inner shaft (4) in a rotationally fixed manner and rotationally mounted on the outer shaft (2). The two cam sections (61, 62) have different cam contours, the relative movement of the two cam sections (61, 62) in opposite directions allowing the resulting cam contour of the cam element (6) interacting with a cam follower to be changed to adjust the variable valve opening period. According to the invention, the two cam sections (61, 62) have different maximum lifts (Hmax_61, Hmax_62), the cam top section (62a) of the cam section (62) having the smaller maximum lift (Hmax_62) being substantially formed by an annular sector (K).

IPC 8 full level

F01L 1/047 (2006.01)

CPC (source: EP US)

F01L 1/08 (2013.01 - EP US); F01L 1/34413 (2013.01 - EP US); F01L 13/0036 (2013.01 - EP US); F01L 13/0047 (2013.01 - EP US); F01L 13/0057 (2013.01 - EP US); F01L 2001/0473 (2013.01 - EP US); F01L 2013/0089 (2013.01 - EP US)

Citation (examination)

Citation (opposition)

Opponent : MAHLE International GmbH,

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 SE SI SK SM TR

DOCDB simple family (publication)

WO 2011032632 A1 20110324; CN 102575536 A 20120711; CN 102575536 B 20141105; DE 102009041426 A1 20110519; EP 2478191 A1 20120725; EP 2478191 B1 20150617; US 2012260873 A1 20121018; US 8820281 B2 20140902

DOCDB simple family (application)

EP 2010005181 W 20100824; CN 201080039773 A 20100824; DE 102009041426 A 20090916; EP 10747593 A 20100824; US 201013496640 A 20100824