Air Intake System - Alfa Romeo 159 Training Material

ENGINE

Air intake system

1. Intake plenum
2. Canister bleeder valve
3. Brake booster vacuum port
4. Blow-by valve
5. Electronic throttle
6. Supporting bracket fastening
FUNCTION: The plenum contains the air that is taken in by the cylinders and conduits that convey the air evenly to
the various cylinders.
MATERIAL: The intake plenum is made of composite material with three layers of nylon filled with 30% glass fibres
and friction welded.
FEATURES: It distributes intake air to each cylinder. The air flows from the throttle body inside the plenum and is
distributed evenly through the single conduits and then into the cylinder volume. The plenum volume and shape must
stabilise the pulses created by intermittent suction of the various cylinders.
Air course length
Air course diameter
Capacity
Plenum weight
Complete module weight
Range of operation
ASSEMBLY CONDITIONS: The following elements must be taken into consideration when fitting the module:
INTAKE PLENUM SUPPORTING BRACKET: The plenum is fastened to the bracket by a bolt.
AIR CONDUIT: The plenum is joined to the injection conduit by means of 4 sleeves and 8 terminals.
COUPLING ELEMENT: The additional plenum-injection conduit fastening is obtained by means of a coupling
element fastened with a screw and bolt.
Traccia Didattica Alfa 159-en-ridotta
ALFA 159 TRAINING MATERIAL
255 mm
48/45 mm
3
3.55 dm
1900 g
3100 g
from -30°C to 120°C
73/318
Fiat Auto S.p.A.
After Sales Training
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