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Originally Posted by fernando_g
Does anybody know what the mean by their "two mode hybrid"?
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Similar to Ford/Toyota- 2 separate inputs to the transmission. Either gas or electric (or both) can move the vehicle. Its based on the prototype busses they've been running in a couple of dozen cities.
It appears to be a CVT, based on this quote from Seattle:
"This bus is totally different," explained Stephens. "When you go to drive away you hear next to nothing. The electric drive system augments the torque required to drive away and helps the diesel engine so you get a nice, smooth, quiet drive away
and there are no shifts whatsoever; it is totally smooth, more like light-rail transportation as opposed to what you conventionally think of with bus transportation."
Also part of this system will be cylinder shutdown, aka "active fuel management"
This is NOT the BAS system that is on the Sliverado and VUE.