LEAFfan said:
First of all, the gasoline engine will come on and does drive the wheels if you: 1. Do jackrabbit starts 2. Drive 70 mph or faster 3. Go up a steep hill or mountain. I guess you missed the memo about GM changing their story from "it only charges the battery" to "yes, it will drive the wheels."
Bzzz ... Mostly FUD, LEAFfan.
1. Wrong. The ICE never comes on for jackrabbit starts
unless the battery is depleted. Of course you may feel like it's giving you Easter Bunny starts instead of jackrabbit, but that's another subject. Besides, the starts don't get any faster when the engine is running.
2. Wrong. The car can travel to its maximum speed on battery and electric motor alone.
3. Wrong. In fact the opposite can happen. With juice in the battery the electric motor can handle any mountain. But if the battery is depleted, the ICE can't put out enough power to keep the car from slowing on a steep slope. There is a special mountain mode you can engage before you get to the mountain which tells the car's computer to use the engine to charge the battery above the normal depletion level. That gives you extra battery/motor power so you don't slow down on the steep part.
But you are correct that the ICE can drive the wheels. Apparently they decided, not illogically, that if the ICE is going to be running anyway it is more efficient (at highway speeds) to send the mechanical power directly to the wheels than to convert it into electricity and back to mechanical power.
Ray