Infinitely Variable Double VANOS
The charge cycle in the N63 engine is realized with four valves per cylinder, which are driven by two overhead camshafts.
The engine timing can be variably influenced by means of the two infinitely variable VANOS units.
The VANOS units used here have the following timing angles:
- Intake VANOS unit: 50° crankshaft angle
- Exhaust VANOS unit: 50° crankshaft angle
The VANOS units on the N63 engine differ from the VANOS units on the N62 engine. The function is identical but some components have been omitted and the VANOS unit has been optimized.
On the N63 engine, the individual vanes of the VANOS unit are no longer individual parts but rather they have been further developed to form an oscillating rotor (as on the N52 engine).
The torsion spring integrated in the N62 VANOS unit is now designed as a coil spring accommodated on the front of the N63 VANOS unit protected by a plastic cover.