VALVE CONTROL SYSTEM

WIPO Patent Application WO/2012/097895

A3

Valve control system (2) for actuating gas exchange valves (4) of an internal combustion engine having both an electrohydraulic valve-lift control device (28) with a hydraulic system (30) which comprises a control valve (32) for the controlled transmission of the movement of at least one cam (26) which is attached to a camshaft (8) to at least one of the gas exchange valves (4) in such a way that a valve lifting curve (44, 45) can be set within a valve control envelope curve (42, 43) by means of the control valve (32), and also having a camshaft adjusting device (14), by means of which the angular position between a crankshaft (12) and the camshaft (8) can be adjusted in such a way that the valve control envelope curve (42, 43) is displaced, and having a control unit (16) which is designed in such a way that, depending on current requirements, it optionally or in combination displaces the valve control envelope curve (42, 43) via the camshaft adjusting device (14) and sets the valve lifting curve (44, 45) via the valve-lift control device (28).

RGUIG ASSAKALI ABDELHAK (DE)
DURMAZ CENK (DE)
RICHTER STEFAN (DE)
EICHENBERG ANDREAS (DE)

PCT/EP2011/070155

September 20, 2012

November 15, 2011

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SCHAEFFLER TECHNOLOGIES AG (DE)
RGUIG ASSAKALI ABDELHAK (DE)
DURMAZ CENK (DE)
RICHTER STEFAN (DE)
EICHENBERG ANDREAS (DE)

F01L1/344; F01L9/14; F01L13/00; F02D13/02

EP0317372A1	1989-05-24
DE10024719A1	2001-04-26
EP0224152A1	1987-06-03
EP1617048A1	2006-01-18
EP1087106A2	2001-03-28

DR LUCIO BERNARD ET AL: "Elektrohydraulische Ventilsteuerung mit dem MultiAir-Verfahren", MOTORTECHNISCHE ZEITSCHRIFT MTZ,, vol. 12, 1 January 2009 (2009-01-01), pages 892 - 899, XP001525896

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