15
Air supply unit
The air supply unit is installed at the front left of the engine compartment. This prevents any
impairment of the acoustics in the passenger compartment. Furthermore, more effective cool-
ing can be achieved. This increases the amount of time the compressor can be switched on,
and thus the quality of control.
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Function:
It functions in an identical manner to the unit
used in the allroad quattro.
The unit is switched off when necessary to
prevent the compressor from overheating
(excessive cylinder head temperature). The
maximum static system pressure is 16 bar.
Components:
1. Bracket
2. Electric motor
3. Compressor
4. Air drier
5. Pneumatic exhaust solenoid valve
6. Temperature sensor
Pneumatic connections:
7. Air intake and exhaust line
8. Compressed air connection to solenoid
valve block
Electrical connections:
9. Connection to exhaust solenoid valve
10. Connection for battery voltage 12V
11. Connection for temperature sensor
Design:
The air supply unit is the same as the one
used in the allroad quattro (see SSP 243).
