Technical data

9
8
VANOS
As known from the S62, the VANOS system is
used on the S85 to adjust both the intake
camshaft as well as the exhaust camshaft. The
intake camshafts have an adjustment range of
60° crankshaft angle and the exhaust
camshafts 37° crankshaft angle.
The oil pressure of 115 bar is produced by a
high pressure pump installed in the oil pan.
The high pressure pump is driven through a
gearwheel directly from the crankshaft.
The pressurized engine oil is routed via two
delivery lines to the two VANOS control units
and to the pressure accumulator.
The adjustment units feature two proportional
valves that ensure infinitely variable control of
the oil pressure. Compared to the directional
control valves used formerly, proportional
valves ensure shorter control times and
greater operational reliability.
9 - VANOS control unit