Ford licensed hybrid technology from Toyota
according to this source
Ford is making a big deal about the Escape's status as a 'full hybrid' - a combination of series and parallel configurations, just like the Toyota Prius. GM's mass market hybrid offering is not only years away, but also the pathetic mild hybrid configuration. Ford's hybrid technology was originally licensed from Toyota, which explains the many fundamental similarities, like the elimination of the conventional starter motor. As the electric motor hits a certain output level, it force starts the gasoline engine.