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Provoq shows off E-flex technology

2008-01-10 08:38
Vehicle Specs
Manufacturer Cadillac
Model Provoq
Engine Hydrogen fuel cell
Power 88kW
Zero To Hundred 8.5 seconds
Top Speed 160km/h
Tyres 205/60R21 Michelin Green X
Front Suspension Independent MacPherson-strut
Rear Suspension Independent multi-link
Cadillac has unveiled a dramatic improvement in its alternative fuel strategy vehicles with the hydrogen powered Provoq.

The 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, powers the Provoq.

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.

Decent range

A fuel-cell stack is fed with 6kg of hydrogen stored under 700bar pressure, ultimately mixing with oxygen to produce electric power to the tune of 88kW.

Additionally the 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.

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.

It can sprint to 100km/h in 8.5 seconds and has a top speed of 160km/h. The Provoq can drive 483 km on a single fill of hydrogen - covering 450 km from hydrogen powered range and 32 km on pure, battery electric energy.


Despite the Provog concepts stylish exterior appearance, exemplary wind-tunnel testing and engineering refinements have been incorporated into the design to ensure minimal drag and maximum aerodynamic efficiency.

Amongst these are the active front grille which features louvers which open when the fuel stack require cooling, a full underbody aerodynamic cover, flush push-to-release door handles and low-drag coefficient roof racks.

Featuring unusually large wheels for an efficiency concept (21-inches), Provoq is shod with the latest low-resistance Michelin tyres.

Contemporary interior

Despite hydrogen fuel tanks mounted beneath the cargo floor, with the storage batteries located at the centre of the chassis and the fuel cell stack under the hood, the Provoq retains the interior layout of a conventional crossover - including a full cargo area and a 60/40-split folding rear seat.

Provog also features a unique instrument cluster with large, reconfigurable LCD displays offers a multitude of vehicle information readouts, including fuel cell information and vehicle performance.

A centre stack similar to the CTS, the Provoq has a prominent centre stack that houses the audio and climate systems, as well as a navigation system that rises out of the top of the instrument panel. Also, like the CTS, there is an integrated hard drive that stores navigation maps, thousands of songs and more.

Between the front bucket seats is a large centre console with a fully enclosed storage compartment that is home to ports for USB-connected devices and other electronics. The console also has a cell phone holder with built-in Bluetooth and inductive charging.

Many of the interior materials are environmentally friendly too, including the headliner being wrapped in a fully recyclable soy-based material, carpets made of recycled polyester and jute and leather used to cover the seats and instrumental panel being free of harmful chemicals.

Little details concerning the safety of the high-pressure hydrogen fuel storage tank in high-impact collisions have been alluded too.


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