The results are increased output by virtue of
improved cylinder charging with fresh mixture, more torque at low revs and very fast response times.
Added to this is a variable intake manifold with two resonance valves which work together with the sport exhaust system to ensure
efficient cylinder charging and high throughput rates.
Perfect cylinder charging is guaranteed by the vertical arrangement of the intake and exhaust ducts, as well as the magnesium variable intake manifold with two integral throttle flaps.
Owing to a higher boost pressure on the inlet side, the engine attains
optimal cylinder charges despite the shorter intake time.
Thanks to a more constant residual - gas content, a higher knock limit and improved bottom - end and
mid-range cylinder charging, the shifting camshafts increase the V8 engine's torque and refinement.
Its Multi-Air individual cylinder fully variable valve duration and lift control, provides most of the fine
individual cylinder charge control needed for such HCCI, or semi-diesel operation.
Its intake camshaft can be adjusted through 42 degrees for
optimum cylinder charging and the two balancing shafts rotate at double the speed of the crankshaft to compensate for the second - degree inertial forces.
The large volume of the exhaust system supplements the low - resistance intake manifold to
improve cylinder charging and increase performance.
They lead to a
higher cylinder charge, resulting in a lower combustion temperature with lower NOx emissions as well as a leaner combustion air ratio and therefore lower particulate emissions.
The key benefit of this sophisticated, on - demand control of the combustion air supply by means of two turbochargers is the improved
cylinder charging and, consequently, a high torque even at low revs.
This results in increased output due to improved
cylinder charge, more torque at low revs and immediate throttle response times.
As the intake valves are open for shorter periods in the TSI Miller cycle, the cylinders must be filled with
the cylinder charge at a boosted charge pressure.