Technical data

24
9
The actuator (adjustment unit) is connected to
the outer and inner sleeve by the screw
connection of the gear mechanism. During
adjustment, the inner sleeve and outer sleeve
are pulled out of and pushed into the gear
mechanism.
The inner sleeve is turned by the helical
gearing on the "fixed" drive gearwheel (timing
chain drive). Due to the non-positive screw
connection of the outer sleeve, this sleeve also
turns. In connection with a further helical gear,
the outer sleeve now turns the bearing for the
drive gearwheel and in turn the camshaft
connected with the central bolt.
The gear units are mounted in their base
position, i.e. pulled apart. The camshafts are
adjusted when the gear units are pushed
together.
The drive gearwheel and bearing for the drive
gearwheel are connected by a torsion spring
to assist the return movement.
The mounting screws for the gear mechanism
are tightened only lightly when assembling the
actuators. As a result, no force is transmitted
from the outer sleeve to the inner sleeve when
sliding the actuators onto the cylinder head (to
facilitate the sliding movement of the gear
unit). Due to the "fixed" drive gearwheel, the
outer sleeve turns in the direction of engine
rotation. At the same time the "fixed" bearing
for the drive gearwheel turns the inner sleeve
opposite the direction of engine rotation.
14 - Design of intake gear mechanism
Index Explanation
1 Drive gearwheel assembly
2 Inner sleeve
3 Outer sleeve
4 Bearing for drive gearwheel
15 - Intake gear mechanism adjusted