The Volkswagen Tiguan GTE Active Concept makes its world debut at the North American International Auto Show (NAIAS), in the country that popularized the Sport Utility Vehicle (SUV). The vehicle’s most striking innovation is its efficient plug-in hybrid system that uses two electric motors and a gasoline engine, which can supply all four wheels with power, either automatically or at the push of a button. This concept proves how much potential plug-in hybrid systems have. The all-wheel-drive system’s technology ensures that this SUV can offer supreme off-road performance, even in all-electric mode.
The five-seat concept is based on the completely redeveloped second-generation Tiguan. The GTE Active Concept reflects the great technical versatility of the new SUV, which will arrive to the U.S. market in 2017 with a longer wheelbase and available seven-seat functionality. For Volkswagen, the new Tiguan marks the kickoff of an SUV product offensive that will significantly expand the range of vehicles offered, especially in North America.
The concept car starts every journey in all-electric E-mode as a zero emissions vehicle. Normally, the rear wheels are driven, but if there is loss of traction, the front wheels are engaged within fractions of a second. Four-wheel-drive is also activated when the driver selects 4MOTION® Active Control or when GTE-mode is selected, for instance. The vehicle can cover up to 20 miles in all-electric mode. The driving range, based on a battery capacity of 12.4 kWh and a 16.9-gallon fuel tank, is 580 miles.
Volkswagen has configured the design, packaging and technical features of the SUV to be as innovative as its plug-in hybrid drive system. The Tiguan is the first SUV to be based on the Modular Transverse Matrix (MQB), and demonstrates intelligent space utilization. The GTE Active Concept projects an authentic off-road look and makes a powerful impression with its stylish, taut proportions.
Moreover, the Tiguan GTE Active Concept is also equipped with safety systems such as Front Assist with Autonomous Emergency Braking and pedestrian monitoring, an active hood for pedestrian protection, Lane Assist and the Automatic Post-Collision Braking System. Another highlight of the concept car is its infotainment system: the Tiguan GTE Active Concept features the top level of the latest generation infotainment systems and is equipped with a 9.2-inch touchscreen, gesture control (implemented for the first time in this class), an Active Info Display (fully digital instruments) and a head-up display.
The Tiguan GTE Active Concept is equipped with a turbocharged and direct-injection TSI® gasoline engine that produces 148 horsepower and 184 pound-feet of torque, mated to two electric motors. These make 54 hp at the front wheels and 114 hp at the rear. The total system power of 221 hp can supply all four wheels with propulsive force under off-road conditions and the 4MOTION all-wheel-drive system also boosts traction and contributes to active safety on normal pavement.
The Tiguan GTE Active Concept uses a 6-speed dual-clutch (DSG®) automatic transmission that was specially designed for hybrid use, with the front electric motor being housed inside the casing. Other plug-in hybrid components of the 4MOTION plug-in hybrid drive include: a 12.4 kWh lithium-ion high-voltage battery that can be charged either externally or via the gasoline engine; power electronics for the front motor; a second module at the rear that converts the battery’s DC current into AC for the electric motors; and an on-board charger.
Depending on the driving mode, the Tiguan GTE Active Concept can be driven by the front, rear, or by all four wheels. As a default, the concept car always starts off in zero emissions E-mode. If the battery is sufficiently charged, the rear electric motor powers the car by itself, while the TSI engine and the front electric motor are decoupled from the drivetrain and shut off to save energy. However, as soon as the driving situation demands it, or the driver manually activates a related mode, the front electric motor is engaged within fractions of a second. This means the Tiguan GTE Active Concept is a zero-emissions all-wheel-drive vehicle that can cover up to 20 miles on battery power alone. In E-mode, the Tiguan has a top speed of 70 mph.
If the battery isn’t sufficiently charged and the system calls for the rear electric motor to be supplied with power for dynamic handling or for the Off-road program, the TSI engine is re-started and engaged (Hybrid mode). In this case, the front electric motor serves as a generator for the rear electric motor. Since the energy for driving the rear axle flows “by wire” and not mechanically, this is called an “electric driveshaft”. In Hybrid mode, the Tiguan GTE Active Concept may automatically use the TSI engine and/or the electric motors, depending on the energy level of the battery.
The rotary/push-button switch for the new 4MOTION Active Control unit is located on the center console. The driver can use this control to select one of six driving programs: On road (Comfort or Eco); Offroad (Rocks, Sludge & Sand, or Gravel); Sport; Snow; Charge (battery is charged while driving); and Battery Hold (maintains a constant battery charge). When the Tiguan driver turns the switch to the left, the On-road, Sport, Snow, Charge or Battery Hold programs can be activated. When the switch is turned to the right, the user can access the Off-road programs. In off-road duty, the 4MOTION Active Control can adapt the assistance systems to the given driving situation within seconds, an added safety benefit. The same applies to the Snow program, which optimizes safety in winter road conditions.
The E-mode and GTE mode are activated by separate buttons on the center console. When the driver presses the E-mode or the GTE-mode button a second time, the car switches back to Hybrid mode. As mentioned, the Tiguan GTE Active Concept may operate with either rear-wheel or all-wheel drive in Hybrid mode and in E-mode. In the sporty GTE mode, the car automatically switches to all-wheel drive.
The GTE mode is unique to plug-in hybrid Volkswagen vehicles. The transmission, accelerator pedal, engine mapping, and steering settings are sportier and the TSI engine and the electric motors work together (in kickdown/boosting) to allow the full system power of 221 hp to be available. When this happens, the Tiguan GTE Active Concept has a top speed of 120 mph and can accelerate from zero to 60 mph in 6.4 seconds. Depending on the given driving situation, the system may use the TSI engine only or switch over to the additional “Coasting” or “Regenerative braking” hybrid modes.
- Coasting function. As soon as the driver takes their foot off the accelerator pedal, the engine and all motors are shut down and disengaged from the drivetrain, provided that the battery is sufficiently charged. This is known as “Coasting”.
- Regenerative braking. When the driver takes their foot off the accelerator pedal or brake and the battery is insufficiently charged, both electric motors work as generators and feed the energy generated during braking into the battery. In this case, the TSI engine is shut off and disengaged.
- Driving with the TSI engine. When the gasoline engine alone is powering the vehicle, only the front wheels are driven.
The second-generation Tiguan is based on the modular transverse matrix (MQB) and shares the same long wheelbase, short overhangs, and exceptional packaging of other vehicles based on this architecture. The Tiguan GTE Active Concept is 176.9 inches long, 74.8 inches wide, 69.5 inches tall, and has a wheelbase of 105.6 inches.
The team of designers and engineers responsible for the Dragon Red Metallic concept car developed it for extreme off-road use, building on an excellent base with the existing production vehicle. For instance, ground clearance under the axles increased from 7.1 to 8.9 inches and the maximum ground clearance under the body increased from 7.9 to 9.6 inches. The approach and departure angles were improved from 25.6 to 26.1 degrees at the front and from 24.7 to 29.9 degrees at the rear. The maximum ramp angle for overcoming road bumps grew from 20 to 24.7 degrees.
Among the changes on the concept, there is a sturdy front skid plate that makes it clear that the Tiguan GTE Active Concept is designed for off-road excursions. The matte aluminum shield is equipped with four solid black polymer protectors which guard against contact with stones and bushes and can be easily replaced after an extreme trip through the outback. The front bumper is also trimmed in an all-terrain element made of “Dark Graphite” (matte anthracite-gray) durable polymer.
If the Tiguan GTE Active Concept is needed to pull another vehicle in reverse, there are two aluminum-colored metal hooks in the front air intakes on the left and right sides. The standard LED headlights are complemented by C-shaped LED Daytime Running Lights, a signature of all Volkswagen plug-in hybrid and electric vehicles. One sophisticated design element is the lateral continuation of the upper and lower bars of the radiator grille to the headlights, forming a single, wide and powerful unit.
The roof section is also equipped with a dark all-terrain module that integrates high-strength cross-rails that can serve as a base support for skis or other equipment. They are made of aluminum that contrasts with the black roof. At the front, the roof also has two LED auxiliary spotlights, which are framed in matte aluminum.
On the sides, the interplay of the all-terrain body elements and the distinctively profiled off-road tires clearly identify the Tiguan GTE Active Concept as an off-road vehicle. The 245/70 16-inch tires offer optimal traction on slippery surfaces due to their aggressive tread pattern. The Tiguan GTE Active Concept’s powerful presence is enhanced by “Dark Graphite” wheelarch extensions and sill protection that have been specially developed for the concept car. These sill trim pieces are protected by underbody guard elements made of matte aluminum.
The rear of the Tiguan GTE Active Concept is also equipped with a solid underbody guard made of matte aluminum. Like the front end, four replaceable polymer protectors are used here as well. The lower area of the bumper is protected by anthracite colored all-terrain trim. Above this, the outside of the bumper is also trimmed in anodized anthracite-colored trim strips. The vehicle has two additional solid aluminum-colored metal hooks at the back for towing stuck vehicles or for removing obstacles that are blocking the trail.