EP 1787012 A1 20070523 - CAMSHAFT ADJUSTING SYSTEM
Title (en)
CAMSHAFT ADJUSTING SYSTEM
Title (de)
NOCKENWELLENVERSTELLSYSTEM
Title (fr)
SYSTEME DE REGLAGE D'ARBRE A CAMES
Publication
Application
Priority
- EP 2005052547 W 20050602
- DE 102004039800 A 20040817
Abstract (en)
[origin: US7513230B2] A camshaft adjusting system for an internal combustion engine has a camshaft adjusting device with a first hydraulic chamber and a second hydraulic chamber, wherein the first and second hydraulic chambers act in opposition to one another. A control valve group working as a 4/4-way valve system has a first connection to the first hydraulic chamber, a second connection to the second hydraulic chamber, a tank connection, and a connection for pressurization. The camshaft adjusting system in a first state of the control valve group, when starting the internal combustion engine, is pressure-relieved relative to the tank connection by simultaneously hydraulically connecting the first and second connections of the camshaft adjusting device so that the camshaft adjusting device moves into a dwell position with a single locking mechanism. The dwell position also provides a safety function in case of system failure.
IPC 8 full level
F01L 1/344 (2006.01); F01L 1/34 (2006.01)
CPC (source: EP US)
F01L 1/34 (2013.01 - EP US); F01L 2001/34426 (2013.01 - EP US); F01L 2820/01 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006018330 A1 20060223; AT E487026 T1 20101115; DE 102004039800 A1 20060309; DE 102004039800 B4 20060727; DE 502005010491 D1 20101216; EP 1787012 A1 20070523; EP 1787012 B1 20101103; US 2008115751 A1 20080522; US 7513230 B2 20090407
DOCDB simple family (application)
EP 2005052547 W 20050602; AT 05754144 T 20050602; DE 102004039800 A 20040817; DE 502005010491 T 20050602; EP 05754144 A 20050602; US 57852706 A 20060508