Mitsubishi i MiEV Electric Car

Mitsubishi is developing an electric version of its award winning Mitsubishi "i" minicar and calling it the i MiEV, for "Mitsubishi Innovative Electric Vehicle." It could go on sale in Japan in mid-2010 and possibly in Britain in early 2011. Contrary to rumor, Mitsubishi currently does not plan to bring this battery electric vehicle to the U.S.

The i MiEV research vehicle uses high-energy, 330-volt lithium-ion batteries. A single electric motor drives the rear wheels via a reduction gear and differential. Currently, the batteries provide 16 kilowatt-hours of energy for a range of about 80 miles.

In 2006, Mitsubishi sold 37,000 of its conventionally-powered i models in Japan and is now selling them in the U.K. An efficient model in its own right, the kei-class i has a 64-horsepower, 660 cc three-cylinder all-alloy engine that features turbocharging, intercooling, and variable valve timing. It accelerates from 0 to 50 mph in 11.2 seconds and has a 90 mph top speed. The rear wheels are driven through a 4-speed automatic transmission.

Mitsubishi's four-seater i has already achieved cult status in Japan because of its futuristic styling, agile handling, clever use of interior space, and comfortable ride. The rear-mid-engine configuration allows a passenger cabin that provides ample space for four adults and their luggage. Happily, this rear-mid-engine location also makes it easy to replace the internal combustion powerplant and gas tank with an electric motor and batteries. The only substantial modification needed is reinforcing the rear cross member to support the extra weight.

The i uses an aluminum spaceframe chassis with MacPherson struts at the front and a 3-link De Dion suspension system at the rear. Maneuverability is impressive with its turning radius a mere 15 feet. Anti-lock braking with EBD (Electronic Brakeforce Distribution) is standard. Occupants are protected by twin front airbags and a sophisticated survival cell.

Next on the agenda is real-world testing of i MiEVs by five Japanese electric power companies, with Mitsubishi slated to supply the utilities with several dozen fleet test cars before the end of the year.