Monday, January 31, 2011

Cadillac Provoq Concept, 2008

Cadillac Provoq Concept, 2008


Cadillac unveils a new vision for the future of luxury transportation with the innovative Provoq fuel cell concept - a hydrogen fuel cell crossover vehicle that continues GM's commitment to displace petroleum through advanced technology.

The Cadillac Provoq fuel cell concept is the latest example of GM's groundbreaking E-Flex propulsion system, combining the new fifth-generation fuel cell system and a lithium-ion battery to produce an electrically driven vehicle that uses no petroleum and has no emission other than water. The concept's fifth-generation fuel cell technology is half the size of its predecessor, yet it has been developed to produce more power and performance.

Fuel-cell variant of the E-Flex system
The concept can drive 300 miles (483 km) on a single fill of hydrogen - with 280 miles (450 km) from hydrogen and 20 miles (32 km) on pure, battery electric energy.

A pair of 10,000 psi (700 bar) composite storage tanks beneath the rear cargo floor hold 13.2 pounds (6 kg) of hydrogen to feed the fuel cell stack, located under the hood. There, hydrogen mixes with oxygen to generate electricity - up to 88 kW continuous power. A lithium-ion battery pack can store up to a total of 9kWh of electrical energy and also provides a peak of 60 kW of power for additional performance.

The electricity generated by the fuel cell is distributed to a 70 kW co-axial drive system for the front wheels and individual, 40 kW wheel hub motors on the rear wheels, giving the Cadillac Provoq its all-wheel-drive traction and great driving dynamics. Its 0-60 mph (approximately 100 km/h) speed of 8.5 seconds is a more than 30-percent improvement over the previous-generation fuel cell system and with instantaneous torque to the wheels, it feels even faster. Provoq has a top speed of 100 mph (160 km/h).

Key features
With sleek, signature Cadillac bodywork, the Provoq concept redefines luxury crossovers, offering uncompromising passenger and cargo space to match its performance and cruising range. Additional vehicle features include:
    * Solar panel integrated in the roof to help power onboard accessories, such as the interior lights, audio system and more
    * Brake-by-wire technology
    * Front grille louvers that close at highway speed to enhance aerodynamics, and open at low speed to provide maximum cooling to the fuel cell stack

Highlights include:
    * Active front grille, with grille louvers that open when the fuel cell stack requires cooling
    * Full underbody aerodynamic cover
    * Left- and right-hand charging ports incorporated in stylish front fender vents
    * Flush door handles that feature push-to-release operation
    * Wind tunnel-shaped outside mirrors with integral turn signals
    * Center high-mounted rear stop lamp incorporated into full-width, wraparound spoiler
    * Signature vertical taillamps with subtle fin design
    * Side glass mounted flush with pillars
    * Wheels with clear-covered space between the spokes, creating a sleeker profile while maintaining Cadillac's signature bold wheel design
    * Low-drag roof rack

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