Global Patent Index - EP 4043702 A1

EP 4043702 A1 20220817 - A SYSTEM FOR OPERATING A CYLINDER VALVE ASSEMBLY FOR AN INTERNAL COMBUSTION ENGINE

Title (en)

A SYSTEM FOR OPERATING A CYLINDER VALVE ASSEMBLY FOR AN INTERNAL COMBUSTION ENGINE

Title (de)

EIN SYSTEM ZUM BETREIBEN EINER ZYLINDERVENTILBAUGRUPPE FÜR EINEN VERBRENNUNGSMOTOR

Title (fr)

SYSTÈME D'ACTIONNEMENT D'UN ENSEMBLE DE SOUPAPE DE CYLINDRE POUR UN MOTEUR À COMBUSTION INTERNE

Publication

EP 4043702 A1 20220817 (EN)

Application

EP 22155573 A 20220208

Priority

IT 202100002960 A 20210210

Abstract (en)

A system for operating a cylinder valve assembly for an internal combustion engine comprising a main event motion source configured to provide main event valve motions to the valve assembly, a main rocker arm operatively connected to the main event motion source, in such a way to assume an active condition at main event and a released condition, a lost motion assembly (LMA) operatively associated to the valve assembly (VB), wherein the lost motion assembly includes a locking element (LE), wherein the locking element is arranged to assume a locking condition with a first portion disposed in a corresponding seat (LES) of the valve assembly wherein the outer plunger includes a first duct (LD) to convey a hydraulic medium, arranged to pressurize the seat (LES) and wherein the lost motion assembly is realized such that sliding force exerted on the locking element by the corresponding seat pressurization exceeds frictions developed between the locking element and the corresponding seat only when the rocker arm is in released condition

IPC 8 full level

F01L 13/00 (2006.01); F01L 1/12 (2006.01); F01L 1/14 (2006.01); F01L 1/18 (2006.01); F01L 1/24 (2006.01); F01L 1/26 (2006.01); F01L 1/46 (2006.01); F01L 13/06 (2006.01); F02D 13/04 (2006.01)

CPC (source: EP)

F01L 1/12 (2013.01); F01L 1/143 (2013.01); F01L 1/181 (2013.01); F01L 1/2411 (2013.01); F01L 1/26 (2013.01); F01L 13/0005 (2013.01); F01L 13/06 (2013.01); F01L 2001/2444 (2013.01); F01L 2001/467 (2013.01); F01L 2810/02 (2013.01); F02D 13/06 (2013.01)

Citation (applicant)

US 2014251266 A1 20140911 - EMMONS KRISTIN V [US], et al

Citation (search report)

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)

EP 4043702 A1 20220817; IT 202100002960 A1 20220810

DOCDB simple family (application)

EP 22155573 A 20220208; IT 202100002960 A 20210210