By Jorn Madslien
Business reporter, BBC News, Detroit motor show
Japanese carmaker Toyota is adding new models under its Prius petrol-electric hybrid label.
The move aims to capitalise on the green image of the Prius, which even rival carmakers say has become synonymous with hybrids.
"In the US, hybrid means Prius," said Jim O'Donnell, chief executive and president of BMW of North America.
"No other manufacturer sells significant numbers of their hybrid vehicles."
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With new models being launched, the Prius brand should evolve into a subsidiary marque, similar to the way Toyota's luxury subsidiary Lexus is widely seen as separate from its Japanese parent company.
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more:
http://www.bbc.co.uk/news/business-12159469