Repair manual

Engine Mechanicals
4
Audi Valve Lift System (AVS)
The Audi Valve Lift System (AVS) was developed to
optimize the combustion charge cycle. AVS was
introduced in the North American Region with the 3.2L V6
FSI engine in 2008.
The AVS application on the turbocharged 2.0L CAEB
engine is different from that of the 3.2L V6 AVS engine.
On the 2.0L CAEB engine, AVS changes the lift and timing
of the exhaust valves only.
The firing order of the 2.0L CAEB engine is separated.
This “firing sequence separation” means the gas pulses
produced during the exhaust cycles of the individual
cylinders do not effect the pulses of the previously fired
cylinders. The result is referred to as “pulse charging.”
Intake
Camshaft
Exhaust
Turbocharger
Exhaust Camshaft with
Audi Valve Lift System