Sporty spirit meets efficiency — the new Audi S6 and S7 take off with a powerful V6 TDI engine that offers customers the brand’s superb driving dynamics over long distances. For the first time, Audi (www.audimanual.ru/en) combines an electrically driven compressor with a 48 V electrical system. The S-sport suspension with adjustable dampers, the dynamic control of the four-wheel braking system with ceramic discs, do not leave unrealized the desired balance of road behavior and braking options. The characteristic design with high-quality S-Vision gives a special look to high-end sports models.
«Torque»: electrically driven compressor and 700 N torque
The huge 700 Nm of torque that the driver can have at any time and remains constant between 2500 and 3100 rpm is the perfect answer to the preferences of European customers looking for maximum performance on the road.
Ultimately, the S TDI models offer both performance and efficiency in equal measure. With the S6 and S7 TDI models, the Audi brand continues and develops the successful SQ7 TDI drive concept (combined fuel consumption in l/100 km: 7.6 — 7.2; combined CO2 emissions in g/km: 199-189) : For the first time, Audi engineers have combined an electrically driven compressor and a 48-volt electrical system. The 3.0-litre V6 TDI achieves 257 kW (349 hp). An eight-speed automatic transmission is responsible for the transmission, always in combination with the quattro all-wheel drive system.
Spontaneous helper: electrically driven compressor
The electrically driven compressor delivers powerful lift at low RPMs. In addition to extremely dynamic acceleration, the electrically driven compressor also offers a reusable Boost function for rapid pressure buildup. In this way, the electrically driven compressor eliminates the phenomenon known as «turbo hole», providing fast gas response and powerful acceleration in any situation.
The electrically driven compressor has a response time of less than 250 milliseconds, a peak power of seven kilowatts, and a maximum speed of up to 70,000 minutes. The electrically driven turbocharger boost function operates on the engine side up to 1650 rpm. Thanks to dual forced charging, which includes an electric compressor driven by the exhaust turbocharger, the S models have a massive 700 Nm of torque that remains constant between 2500 and 3100 rpm. Delivering instant torque. — for example, when starting off or accelerating from the lowest operating conditions of the drive unit. A turbocharger similar to a compressor with an external electric drive and is mounted directly on the engine immediately after the intermediate cooling compressed air from the turbocharger. In most cases, it is separated from the pressurization system using a bypass valve. However, when the power demand becomes high due to heavy pressure on the accelerator pedal while the energy provided by the turbocharger is insufficient, the bypass valve closes and the intake air flows directly to the electrically driven compressor. The compressed air flow enters directly into the combustion chambers.
The result: spontaneous throttle response and impressive traction acceleration, including overtaking or sudden load changes. Thus, all the power of the 3.0 TDI engine is available as soon as the driver needs it. In everyday life, this technology saves the transmission a lot of downshifts, thereby reducing the level of speed, and the «turbo hole» of conventional turbochargers disappears without a trace. The electrically driven compressor provides exceptional power during acceleration. The electrically driven V6 TDI engine accelerates the S6 Limousine in just 5.0 seconds from 0 to 100 km/h, while in the S6Avant and S7 Sportback the classic sprint takes just one-tenth of a second longer. seconds is 250 km/h.
«Pure power» — up to 40 seconds of «soaring»: 48-volt Mildhybrid system. While the electrically driven compressor provides better dynamics, the Mildhybrid (MHEV) system reduces fuel consumption. The 48V MHEV system consists of a Regenerator Belt Starter (RSG) and a 10Ah Lithium Ion battery installed in the floor of the vehicle. The RSG is connected to the crankshaft. When the speed is reduced, it can recover up to 8 kW of power, the electricity generated in this way is stored in a lithium-ion battery. When the RSG gas is supplied, the engine starts quickly and quietly.
MHEV technology allows the start-stop system to operate at speeds below 22 km / h. Thus, thanks to the interaction of the Mildhybrid system and vehicle sensors, S-models boast a reduction in consumption of up to 0.4 liters per hundred kilometers in real conditions and are able to «soar» up to 40 seconds with the engine. completely off.
Equipped in this way, the S TDI models combine outstanding driving dynamics with a high level of efficiency, low fuel consumption and low emissions. All STDI models are homologated to the Euro 6d emission standard. 164 grams of CO2 per kilometer. For the S6 Avant, the values are compared to 6.5 l/100 km and 171 grams, and for the S7 Sportback, to 6.5 liters and 170 grams respectively.
