CL 600 (215.378) V12-5.8L (137.970) (2002)
Variable Valve Timing Actuator: Description and Operation
Camshaft Adjustment Valve, Function
Camshaft Adjustment Valve, Function
ENGINE 137.970
Y49/1
Camshaft adjustment valve, left bank of cylinders
Y49/2
Camshaft adjustment valve, right bank of cylinders
1
Housing
2
Coil
3
Armature
4
Control plunger
A
to working chamber in camshaft adjuster
P
Engine oil feed (pressure side) when valve actuated
T
Engine oil return flow (pressureless)
Voltage for the camshaft adjustment valves is supplied by circuit 87. Actuation is performed by the ME control module at the ground side and clocked.
A starting current of as much as 2.6 A is permissible for short periods (on/off ratio approx. 95 %). The holding current is approx. 0.55 A at a clock
frequency of approx. 1 kHz.