The invention relates to a device for the variable actuation of gas
exchange valves for internal combustion engines, wherein at least one cam
(2) pertaining to a camshaft (1) mounted in a housing rotates according
to the engine speed. The cam (2) first drives an intermediate member (4)
which performs a clear oscillating, rotary movement and has a rotational
axis (7) that can be displaced in the housing parallel to itself along a
curve of displacement (8), said intermediate member comprising a control
cam (5) having a lifting region (5b) and actuating an output member (11)
that, in turn, actuates at least one valve (13). The aim of the invention
is to enable one such device to be reliably controlled. To this end, the
control cam (5) has a catch region (5a), and the intermediate member (4)
is mounted on a bearing having an axis which corresponds to the
rotational axis (7), said bearing being arranged in such a way that it is
guided in a forced manner and can be displaced parallel to the curve of
displacement (8, 28, 35), by means of an articulation (16, 24, 26)
connected to the cylinder head or the housing or by a slide (34) that is
guided in the housing in a positively locking manner. The invention also
relates to a method for operating an internal combustion engine
comprising a plurality of cylinders using at least one of the inventive
devices.