28
N62 Engine
Valve Lift
The Valvetronic motor worm gear rotates the eccen-
tric shaft clockwise or counterclockwise at a very
quick rate (1).
Due to the progressive “lobe” on the eccentric shaft,
this rotation positions the intermediate lever (2) closer
or further to the camshaft lobe.
As the camshaft is rotating (3), the cam lobe will pivot
the intermediate lever (4) and the “heel” of the inter-
mediate lever will depress the roller finger. A spring is
located on each intermediate lever to maintain con-
stant contact with the camshaft.
The roller finger is cushioned by the HVA and will open
the intake valve (5).
The Valvetronic system varies the valve opening lift
between 0.3 mm and 9.85 mm by rotating the eccen-
tric shaft during engine operation to increase or
decrease intake (flow) into the cylinder based on throt-
tle request.
* This is an assembly that affects all of the intake
valves (per cylinder head) to work in unison.
N
No
otte
es
s::
1
2
3
4
5
Содержание N62B44
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