General Motors doesn't plan to develop Volt as a brand, unlike rival Toyota which is considering an expanded Prius line, a senior executive has said.

"Our thought is to take the Volt technology to other products," Brent Dewar, chief of global operations for Chevrolet, told the Reuters Autos Summit in Detroit. "The Volt was the original vehicle that we started, but I wouldn't see that as a brand marketing direction for us," he said.

Dewar said the Volt would pave the way for more vehicles based on the same technology combining a rechargeable battery pack for all-electric driving with a petrol-powered generator for longer trips.

But he said the Volt name would not be identified with GM's future electric vehicles.

By contrast, Toyota's brand chief said earlier this week the automaker was considering a plan to make Prius the name behind a broad family of high-mileage hybrid vehicles.

Bob Carter, group vice president of Toyota's US sales arm, told the Reuters Autos Summit on Monday he believed the Prius had become synonymous with hybrid cars for many consumers just as Kleenex has for paper tissue.

The Volt is on track to become the first mass-market, plug-in hybrid in the United States. It is designed to run for 40 miles on a single battery charge, and can be recharged at a standard electric outlet.

When the battery is partly depleted, a small engine will kick in to recharge it and power the vehicle, allowing it to make longer trips without what Dewar called "range anxiety."

GM has said the Volt could cost as much as US$40,000 before a $7,500 consumer tax credit is applied. GM expects to sell about 10,000 Volts in the first year of production and 60,000 in its second full year.

The Volt will be sold in North America and in Europe before it goes on sale in Asia, Dewar said. The roll-out in Europe is to be in 2011.

Opel, which GM said this week it would keep, will sell its extended-range Volt-derived Ampera in Europe alongside the Chevy Volt, he said.