[Number 3]

Marketing or not, I've had the discussion with members of the Volt team on the deffintion of Series Hybrid. And yes, GM does not want people to simply hear Hybrid and confuse the Volt with a Prius and it's Parallel Hybrid system or even GM's own 2 Mode Hybrid System. Yes, a Prius can operate as a "mild" EV, running a few miles even without hard accleration or climbing grades. But the Volt is, if you choose it to be, a full EV for the first 40 miles. For those first 40 miles, it is NOT a Series Hybrid. And if you choose to operate as such it is simply an EV with plug in recharging. So EREV or Hybrid, the idea may not be new....................it's application in a car is.