I've been trying to scour through google and find some information on how the drivetrain in the Kia Optima Hybrid works. But I'm not having much luck. I know that it is different from the Prius since it has an actual 6-speed transmission. Yet, It appears to be significantly different from the Honda IMA setup too, since it can drive on pure electric with the engine shut off. Can somebody explain how it works? Or point me to an article or other website?