Volkswagen Golf Diesel 2009 Mode D'emploi page 284

Vacuum Pump
The vacuum pump consists of a rotor running in
bearings and a moving vane made of plastic which
divides the vacuum pump into two sections.
Intake
End
Vane
Pressure End
The position of the vane is constantly changing due
to the rotational movement of the rotor. As a result,
the volume of one section increases while the
volume of the other section decreases.
Air Infl ow from
Vacuum System
Induced Air
Rotor
Compressed
Air
Air Outfl ow to
Cylinder Head
(Shuttle Valve)
Air Intake System
Oilway
Vane
Rotor
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