Published on March 4th, 2016 | by Subhash Nair0
Audi SQ7, Pretty Much the World’s Most Powerful SUV
With 435 hp and 900 Nm of torque, the new Audi SQ7 TDI is the most powerful diesel SUV on the market. It also leads the competition in numerous other technical fields. Its newly developed 4.0 TDI engine features a world first: An electric powered compressor gives the Audi SQ7 TDI outstanding off-the-line performance. Yet it consumes on average 7.4 litres of fuel per 100 kilometres.
Forced induction: Three chargers working together
The 4.0 TDI has been newly developed from the ground up. It combines best-in-class performance with low consumption and guarantees maximum dynamics. The V8 engine has a displacement of 3,956 cc. The two exhaust-gas turbochargers are activated selectively according to the concept of sequential charging, since exhaust gas only flows through one turbocharger at low and intermediate load. The second turbine is only activated at higher loads. An electric powered compressor (EPC) augments the work of the two turbochargers, particularly in the lower engine speed range, providing for extremely dynamic off-the-line performance. It accelerates from 0 to 100 km/h in 4.8 seconds; top speed is 250 km/h. In the New European Driving Cycle (NEDC), it consumes 7.4 litres per 100 kilometres. This corresponds to CO2 emissions of 194 grams per kilometre.
Forced induction concept and electrical system: Electric powered compressor (EPC) and 48-volt subsystem
The electric powered compressor is a world first in a production vehicle. This EPC strongly supports the 4.0 TDI engine when starting off and accelerating from low load for pure dynamics with no turbo lag. It is placed in the air path downstream of the intercooler, close to the engine. Because the EPC does not require any exhaust-gas energy to develop boost, it can be used at any time, thus making it the solution for the traditional weaknesses of the classic exhaust-gas turbocharger. With this technology, turbo lag is history. The EPC provides the engine the boost energy needed for the dynamic delivery of power in less than 250 milliseconds. Driven by a compact electric motor, its compressor wheel spins up to 70,000 revolutions per minute. The 4.0 TDI thus develops its immense power with no perceptible lag: It is available immediately upon depressing the accelerator. That is a major plus, particularly when starting off.
Networked suspension control
Audi offers the SQ7 TDI with an optional driving dynamics package comprising three technology modules: sport differential, electromechanical active roll stabilization and all-wheel steering. The highly integrated suspension control unit is used in the Audi SQ7 TDI. It assumes the central control of the adjustable shock absorbers, the air springs, the sport differential and roll force distribution. By bundling all relevant suspension functions into a central control unit, the developers achieved an optimal networking and coordination of the functions among themselves. The customer thus experiences outstanding handling in any situation.
Sporty or comfortable: Body roll stabilization
A new solution in the competitive environment is the electromechanical active body roll stabilization. Here a compact electric motor with a three-stage planetary gearbox separates the two halves of the stabilizer. On an uneven road surface, they are actively decoupled from one another, resulting in improved ride comfort. During sporty driving, the tubes are interconnected and twisted against each other. That significantly reduces body roll, i.e. the lean of the car. Together with the transmission, the electric motors produce anything up to 1,200 Nm of torque. The effect is taut, sporty handling: The car leans less in bends and the tendency to understeer is further reduced.
The front and rear stabilizer can be adjusted independently of each other. This active distribution of stabilizer forces between the front and rear axle has a positive effect on road behavior. Steering precision and the agility of the car improve significantly.
Compared with conventional hydraulically switched stabilizers, the 48volt-based system from Audi offers major advantages. It can develop more power, it works faster and it is activated even at low speeds. Because it requires no oil, the electromechanical active roll stabilization is also maintenance-free and environmentally friendly.
Bold road behavior and handling: All-wheel steering in combination with sporty and direct front-axle steering
With all-wheel steering, the rear wheels turn in by as much as five degrees, making parking easier. The more direct front-axle steering ratio of the Audi SQ7 TDI improves the handling characteristics. Depending on the situation, the rear wheels steer opposite or in the same direction as the front wheels, improving dynamics and stability.
High agility in every curve: quattro with sport differential
For sporty drivers, it is one of the central objectives of road behavior: neutral handling up to the limit, even at high engine power. The optional sport differential provides stable and precise steering, particularly when accelerating dynamically out of curves. Variable torque between the wheels on the rear axle offers supreme control in curves. The Audi SQ7 TDI is pressed precisely into the curve as a result. Even if the rear end starts to swing out, the quattro sport differential brings it back under control. This technology is available for the first time in the Q7 model line and is reserved exclusively for this top model.
Lightweight construction – innovative multimaterial construction
Thanks to systematic lightweight construction, the Audi SQ7 TDI is the lightest SUV in its segment, yet makes no compromises with respect to crash safety. The body features an innovative multimaterial construction. Hot-shaped and extremely strong sheets form the backbone of the occupant cell; the outer skin is made of aluminum. The center of mass is low – another factor for the sporty handling. The drag coefficient is an outstanding 0.34.
Powerful sportiness: Exterior styling
The new Audi SQ7 TDI strikes an impressive balance between powerful and intensified stylistic elements. At 5.07 meters (16.6 ft), it is approximately as long as the base model. The Audi DNA, such as the sculpted Singleframe radiator grille, distinctively highlighted wheels and flared quattro-style blisters, is unmistakable. All lines and surfaces are designed precisely and incisively, and accentuate the width of the car and thus the solidness of the overall concept. The SQ7 TDI has a new radiator grille with an Sspecific design at the bumpers. Other distinguishing features are the side air inlets, the mirror housings and door inlays in standard aluminum. The exhaust system terminates in four rectangular tailpipes.
Light – LED headlights standard
The headlights have a pronounced three-dimensional appearance overall with a double-arrow signature. The standard LED and optional Matrix LED headlights plus the dynamic rear turn signals underscore Audi’s leading role in lighting design and technology. With the LED and matrix LED headlights, the daytime running lights together with the turn signals form a double light guide arrow – a new and unique light signature within the Audi family. Each Matrix LED headlight divides its high beam into 30 individual light-emitting diodes paired with three reflectors. A camera on the interior mirror analyzes the traffic situation. Given this information, the control unit individually turns the diodes on and off, or dims them in 64 stages each, depending on the situation. With the millions of different resultant beam patterns, the high-end headlights superbly light up the road, without blinding other road users. Traffic signs are illuminated with less power so that the driver is not blinded by glare.
The functional range of the Matrix LED headlights also includes intelligent cornering lights, created by a shift in the light center position. If the car is equipped with the optional MMI navigation plus, this system’s route data will trigger the cornering light to illuminate around the corner just before the driver begins turning the steering wheel. The large LED rear lights vary the theme of the headlamps: The tail lights, activated when the ignition is turned on, create a double arrow like the headlights. The brake light is located in the two upper chambers; the interior of the light has a three-dimensional appearance, with lightness and elegance.
High-resolution graphics: Audi virtual cockpit
With its 12.3-inch display, the optional Audi virtual cockpit presents logically structured information in brilliant graphics. Driver ergonomics are excellent, and operation is intuitive. The driver chooses the display mode via the multifunction steering wheel. A head-up display is also available as an option.
The optional MMI navigation plus with MMI allintouch includes a large glass surface on the center tunnel console that provides the finger with haptic feedback after each click. The MMI logic allows for intuitive system operation and also understands terms from everyday speech.
Potent computing power: Infotainment and Audi connect
MMI navigation plus, the optional top-of-the-line infotainment system in the Audi SQ7 TDI, uses the second-generation Modular Infotainment Platform. Thanks to the integrated LTE module and the Wi-Fi hotspot included in the Audi connect package, passengers can surf at high speed with their mobile devices. The Audi connect package brings comprehensive online functions on board.
New on the market is the Audi connect safety & service package, which also includes the myCarManager package. With this, customers can use their smartphone to lock and unlock the car or check the vehicle status, for example.
Another infotainment highlight is the Audi smartphone interface. In the car, a tailored environment on the MMI monitor makes it easy to control smartphones with iOS or the Android operating system.
The sound systems in the Audi SQ7 TDI are as innovative as they are upscale. In the Bang & Olufsen Advanced Sound System, the digital signal processor drives 11 channels with a total of 23 speakers in such a way that the sound is equally precise and harmonious in every seat. Four speakers installed in the Apillars and driven via separate channels broadcast those elements that generate the spatial height, creating a big virtual stage. Newly developed speakers and an amplifier with 1,920 watts guarantee musical enjoyment at the highest level. The Bose Surround Sound system, which generates the surround sound with 19 speakers, also features two speakers located higher up in the Apillars to produce the third dimension.
Optionally, two Audi tablets can be docked in the backs of the front seats. This solution is currently the only removable rear seat entertainment system available in the segment as standard. The Audi tablets make the premium infotainment accessible to the rear passengers as well. With integrated entertainment media and the navigation system from the infotainment system, the Audi tablets bring the full functionality of current high-end Android tablets to the car.
Simply the best: Driver assistance systems
The Audi SQ7 TDI offers a wide range of 24 driver assistance systems to help drivers travel safely, fuel-efficiently and comfortably. The predictive efficiency assistant, for example, provides additional information in the instrument cluster to help the driver save fuel. The standard Audi pre sense city – an anticipatory warning and emergency breaking function for avoiding accidents and protecting pedestrians – makes the SQ7 TDI even safer.
The adaptive cruise control with traffic jam assist relieves the driver in slow-moving traffic on well-paved roads by taking over the steering in many situations. The predictive ACC enables the anticipatory adjustment of driving speed to the route and speed limits, such as when entering towns.