Der Audi h-tron quattro concept
Impressive driving range, quick refuelling, sporty driving performance: The Audi h-tron quattro concept showcases the tremendous potential of fuel cell technology and offers an outlook on piloted driving and parking. The powerful fifth-generation fuel cell produces up to 110 kW power output. An auxiliary battery delivers up to 100 kW for short-term boosting.
All-electric driving with hydrogen as the energy source. The fifth generation of fuel cell technology from Audi and Volkswagen utilises even lighter-weight materials and impresses with power outputs of up to 110 kW, improved responsiveness and longer life. Efficiency levels have been increased to over 60 percent, which is far above that of a combustion engine.
The three hydrogen tanks for the “stack” are located under the passenger compartment and luggage compartment to save on space. They store around 6 kg of hydrogen at a pressure of 700 bar – good for a driving range of up to 600 km. It takes around four minutes to fill the tanks completely – just like for a car with a combustion engine.
For boosting and recuperation, a compact lithium-ion battery located under the passenger compartment supplies the fuel cell drive system with up to 100 kW of extra power. Other efficiency highlights are a heat pump for air conditioning the interior and a large solar roof panel with a maximum electrical power output of 320 watts – enough for an additional 1,000 km of driving range per year.
The electricity from the fuel cell and high-voltage battery drives two electric motors: one at the front axle with 90 kW of power and one at the rear axle with 140 kW. An intelligent management system controls their interplay according to the situation. Driving performance: With 550 Nm of torque, the Audi h-tron quattro concept accelerates from 0 to 100 km/h in less than 7 seconds. The top speed is electronically governed at 200 km/h.
When hydrogen is procured from renewable energy sources, the Audi h-tron quattro concept not only drives with zero emissions locally, but also has zero emissions globally. The world’s first industrial power-to-gas plant is operating today in the northern German city of Werlte. Since 2013, it has been utilising electricity generated by wind power to split water into oxygen and hydrogen by electrolysis. Currently, the hydrogen that is produced is reacted with CO2 to produce the Audi e-gas for the A3 g-tron* and the A4 g-tron* with CNG drive systems – a synthetic methane. In the future, it will also be possible to channel off the hydrogen, which can then be used to power fuel cell cars in a climate-friendly way.
The Audi h-tron quattro concept already has all of the technologies needed for piloted driving and parking on-board: radar sensors, a new type of video camera, ultrasonic sensors and a laser scanner. The central driver assistance controller (zFAS) computes, in real time, a complete model of the car’s surroundings from all available sensor information. The systems that are provided with data from the zFAS can use this information to assume the task of driving – such as in parking or in driving in stop-and-go traffic on motorways at speeds up to 60 km/h.
After many years of pioneering work, this technology will make its production debut in 2017 – in the next-generation Audi A8 premium saloon.
As the driver approaches the technology concept car with a remote key, a light bar integrated into the side sill emits white light in matrix LED technology. It serves as a sort of “lightway” to guide the driver until entering the car while dynamically adapting to the position of the driver. In piloted driving, blue horizontal lines light up on the side of the car for marking purposes. In keeping with the front end, the rear lights also consist of two elements with multiple OLED elements.
The control and display concept of the Audi h-tron quattro concept car harmonises perfectly with the sculptural, driver-oriented cockpit architecture that is characterised by its large OLED displays. Here, Audi is continuing along the same lines as in its most recent conceptual studies, and some details will be introduced into production cars in the foreseeable future.
Air suspension with controlled damping. The chassis with its adaptive sport air suspension lowers the body up to 30 mm over two stages with increasing driving speed, thereby reducing aerodynamic drag. Lightweight five-link front and rear suspensions made of aluminium and high-strength steel offer more efficiency benefits. The 22-inch wheels are equipped with size 265/40 R22 production tyres optimised for low rolling resistance.
The driver and up to three passengers are seated on sporty individual seats, and rear leg room is generous. Despite the sporty roof contour, everyone has ample headroom. The boot offers a volume of 500 litres in its normal state, and when the rear seat backrests are folded, bootspace is increased to 1,610 litres.
Easy loading: Two sensors built into the boot lid trim detect the luggage standing behind the car. Software computes optimal distribution of items in the luggage compartment. A seven-inch monitor at the rear opening informs the driver of the optimal loading sequence.
Aesthetics and aerodynamics in harmony. The technology study of the five-door SUV with its sporty lines is 4.88 metres long and 1.93 metres wide, but only 1.54 metres tall. The vehicle’s silhouette shows coupé-like dynamism with its extremely low glass superstructure that tapers sharply toward the rear. The flowing shoulder line forms distinctive blister contours above the wheels – a reference to the electrified quattro drive system. Broad wheel panels and angular side sills underscore the vehicle’s rugged character.
Its low drag coefficient of 0.27 is crucial for achieving long range, and top levels of efficiency and aeroacoustics. Its sophisticated design measures include cameras that replace exterior mirrors as well as aerodynamic elements on the sides, underbody and at the rear. At higher driving speeds, they improve air flow around the vehicle and thereby contribute to the efficiency of the Audi h-tron quattro concept.
Fuel consumption figures of the referenced models:
Audi A3 Sportback g-tron:
CNG consumption in kg/100 km: 3.6 – 3.3**
Fuel consumption in l/100 km, combined: 5.5 – 5.1**
CO2 emissions, combined, in g/km (CNG): 98 – 89**
CO2 emissions, combined, in g/km: 128 – 117**
Audi A4 Avant g-tron:
This vehicle is not yet on sale. It does not yet have type approval and is therefore not subject to Directive 1999/94/EC.
** Fuel consumption and CO₂ emission figures as well as efficiency classes given in ranges depend on the tyres/wheels used.