The premium carmaker, Audi, has revealed that the new Audi A8 will feature cutting-edge electrification technology and, for the first time, will feature an electrified powertrain as standard.
The Audi A8, which is yet to make its world debut, is set to be the flagship model within Audi’s next generation range and will also feature combustion engines equipped with mild hybrid technology.
For customers, this means refined running and enhanced performance, coupled with greater efficiency. For the first time, the 48-volt electrical system will feature in the new Audi A8 as the primary electrical system.
The mild hybrid drive comprises two main components: first, the water-cooled 48-volt belt alternator starter (BAS), which complements the conventional pinion starter.
The latter is only required for cold starts in the new Audi A8. Then there is the lithium-ion battery in the luggage compartment to act as the energy accumulator for the MHEV (mild hybrid electric vehicle) with a 10 Ah charge carrier capacity and a 48-volt system.
The advantage of the BAS becomes particularly clear when the driver approaches a red traffic signal or a roundabout. If the traffic signal turns green during braking while the vehicle is coasting to a stop, or if a gap appears for the driver to weave into and the driver releases the brake, the combustion engine is started immediately.
The car accelerates without any delay. This is all thanks to the belt alternator starter, which is permanently connected to the combustion engine.
The new drive combines efficiency with comfort in a very special way: The fourth-generation A8 can enter a noiseless coasting mode within the speed range of 55 to 160 km/h.
The automobile can then coast with zero emissions for up to 40 seconds with the engine completely off. As soon as the driver presses on the accelerator again, the BAS prompts a swift, smooth restart. In addition, the start/stop operation is actually active from 22 km/h.
The convenient start/stop function in the new Audi A8 demonstrates notable differences from previous systems. The high-connectivity luxury saloon can distinguish between different traffic situations.
When the road ahead is clear, the BAS starts the combustion engine conveniently and promptly, letting the Audi A8 drive off swiftly. After long standstill phases and if the customer wants to turn up the air conditioning, the combustion engine starts smoothly and quietly.
The latest innovation of predictive convenient starting, directs the Audi A8 to move as soon as the vehicle in front starts to moves, the engine starts even if the brake is still pressed. The control strategy concludes that the driver will spontaneously fall in with the flow of traffic.
To achieve the high standard of efficiency, the new Audi A8 comes with sophisticated powertrain management, which processes both route data and information from its highly networked set of sensors, which includes a front camera.
The powertrain management uses this equipment to decide whether the A8 is in coasting or recuperation mode. The Audi A8 recovers energy not just from brake applications or when coasting but also if it is in danger of getting too close to a preceding vehicle while coasting.
All these measures are beneficial not just in terms of comfort, but also at the petrol station as the A8’s mild hybrid drive reduces fuel consumption during customer operation by up to 0.7 litres per 100 kilometres.