BMW 3: Valve gear
VANOS
VANOS unit B46 engine and B46TU/B48TU engines
- VANOS B46 engine
- VANOS B46TU and B48TU engine
Following the changeover from a two-part chain drive to a single-part chain drive, the camshaft sprockets on the VANOS now have 46 teeth instead of the previous 36 teeth. To compensate for the additional weight of the larger camshaft sprockets, the adjuster was designed to be shorter and more compact. Additionally, the chain track was displaced by 1.5 mm.
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Belt drive
Comparison belt drive B46 engine and B46TU/B48TU engines
B46 Engine (transverse installation shown)
B46TU/B48TU engines (transverse installation shown)
Deflecting element
Alternator
Coolant p
Split cooling
Split cooling is a new development for the B46TU engine. This cooling concept
is a modified version
of which is already used in the N63TU2.
The Split Cooling function uses the electrical Split Cooli
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Music hard disk
General information
Tracks from CDs and USB storage devices can
be stored on the music hard disk in the vehicle
and played from there.
CD: the tracks are converted into a compressed
audio format and stored in a directory
that contains the name of the album. If
no information about the album is
Cooling system
To increase the service life of the high-voltage battery unit and obtain the
greatest possible power, it
is operated in a defined temperature range. The high-voltage battery unit is
essentially operational at
an ambient temperature of -40 ºF to 131 ºF (-40 ºC to +55 ºC ) (actual cell
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