|The Opel Flextreme.|
GM has unveiled the third variant of its E-Flex electric vehicle architecture in Frankfurt. (Earlier post.) The Opel Flextreme is a plug-in diesel series hybrid that offers up to 55 km (34 miles) of all-electric range. A 1.3-liter turbodiesel powers an onboard generator to replenish the 16 kWh li-ion battery pack and extend the vehicle’s driving range to a total of 715 km (444 miles).
Based on the current European test procedure ECE R101 for range extender vehicles, GM expects the Flextreme to emit less than 40 g CO2/km in combustion mode.
|X-ray view of the Flextreme powertrain. Click to enlarge.|
The electric traction system delivers 120 kW maximum electrical and mechanical power, with continuous mechanical power of 40 kW. The four-cylinder 1.3-liter CDTI engine produces 53 kW peak power output. The car accelerates from 0-100km/h in around 9.5 seconds and has a top speed of around 160 km/h (99 mph).
High-speed piezo sensors integrated in the glow plugs measure the pressure in the cylinder, so the injections can be matched to the actual combustion in real time. The 1.3-liter four-cylinder engine is the second unit from GM to feature this system, after the 2.9-liter V6 engine displayed at the Geneva Motor Show. (Earlier post.)
The lithium-ion (nanophosphate) battery pack has peak power of 136 kW and voltage of 320 to 350V. The Flextreme can be charged in around three hours via a standard 220 V electrical socket.
Opel packaged two Segway electric personal transporters packaged below the cargo floor of the Flextreme. The Segways can be used in areas that cars cannot enter, thereby adding an extra mobility option. The electric two-wheelers provide up to 38 km (23 miles) of range.
General Motors introduced two other E-Flex variants earlier this year:
At the Detroit Motor Show in January 2007, the Chevrolet Volt debuted with a 1.0-liter three-cylinder turbo gasoline engine designed to operate on gasoline or E85, a mixture of 85 percent ethanol and 15 percent gasoline. (Earlier post.)
At the Shanghai Motor Show in April 2007, GM presented the Chevrolet Volt with enhanced hydrogen fuel cell propulsion. With four kilograms of hydrogen on board,the fuel-cell powered Volt has a range of up to 480 kilometers. (Earlier post.)