BMW N62 Series Service Training page 51

New Generation N62 Engine
Function
The Valvetronic system is a combination of VANOS and valve lift
adjustment. This combination of abilities allows it to control
when the intake valves are opened and closed, and also the
opening lift.
The intake air flow is set by adjusting the valve lift while the
throttle valve is fully opened.
This improves cylinder filling still further, and reduces fuel
consumption.
The Valvetronic system is based on the one used in the N42
engine, and has been brought into line with the geometrics of
the N62 engine.
Each cylinder head in the N62 engine has a Valvetronic unit.
This Valvetronic unit consists of a bridge support with eccentric
shaft, the intermediate levers with retaining springs, the drag
lever and the inlet camshaft.
In addition, the following components belong to the Valvetronic
system:
- A Valvetronic motor for each cylinder head
- A Valvetronic control unit
- A Valvetronic sensor for each cylinder head
© BMW AG, Service Training
Course Contents/Background Material
Chapter 3 P.39