Video - Audi Supercharger Technology

Written By:
Photography by:

Alongside exhaust gas turbochargers, Audi also makes use of superchargers to boost its engines. A supercharger is used in the 3.0 TFSI. The high-efficiency mechanical charger is situated in the 90-degree V formed by the cylinder banks and is driven by the engine via a poly-V belt. The gas pathways downstream of the charger are very short, thus the torque develops quickly and easily. The full boost is available even at idle.

The supercharger is located downstream of the throttle valve. Because the density of the intake air is low at engine loads below the boost level and when coasting, the supercharger’s rotors move easily when the engine has little or no need for charge air in the lower load range. Little power input is required – a good starting point for low losses and high efficiency.

Inside the so-called Roots blower, two four-vane rotary pistons similar to worm gears counter-rotate at a speed of up to 23,000 rpm, with an air gap between them measuring just a few thousandths of a millimeter. The rotary pistons can deliver 1,000 kilograms (2,204.62 lb), or 850,000 liters (30,017.47 cubic ft), of air per hour and compress it with a boost pressure of up to 0.8 bar (12 psi). An extensive suite of technical measures reduces noise from the supercharger to a minimum.

The brand with the four rings has a long tradition of supercharger technology. As early as the 1930s, the legendary Grand Prix racing cars built by Auto Union already had mechanical chargers, which coaxed as much as 440 kW (around 600 hp) of power and 850 Nm (626.93 lb-ft) of torque out of the mighty 12- and 16-cylinder engines.

Comments

Audi TT ultra quattro concept
Audi TT ultra quattro concept

Audi TT ultra quattro concept – which combines minimal weight and maximum sportiness. A wide range of high-performance cars will also give fans another taste of sportiness...

The new Audi A3 Sportback g-tron
The new Audi A3 Sportback g-tron

Audi is taking a large step towards sustainable mobility with the A3 Sportback g-tron. The compact five-door car, due to make its debut at the end of the year, is powered by the CO2-neutral fuel Audi e-gas. ...

Audi involved in standard for sustainable aluminum
Audi involved in standard for sustainable aluminum

Audi ultra-lightweight construction: The body of the Audi A8 was designed as an Audi Space Frame- (ASF) structure and consists largely of aluminum. As a result, it weighs approximately 40 percent less than a comparable steel structure....

EuroCar News on youTube Follow eurocarnews on Twitter