Quote:
Originally Posted by Tahoe_Hybrid
It has very aggressive DFCO. That is how i'm able to get that many mpg in the first place..
I suspect the Electrical motor is spinning the engine in DFCO... with a OBD reader you can see 0.00v on the upstream o2 sensor. that mean no fuel to air ratio.
when i first saw that i thought my sensor was broken or some other issue..
since there is no "engine braking"
it feels like it's in "neutral gear"
if I shift it into Manual Mode it has "engine braking" and you stop pretty quickly
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Under steady,constant speed cruising,where the engine would develop its best BSFC,and the motor wouldn't be in the equation,your Road Load Horsepower would determine your mpg.DFCO wouldn't enter into the equation.And so it would come down to rolling resistance and aero drag.There's no magic sauce as far as tires are concerned,unless your on a railroad track.Which leaves aerodynamics.I've driven hybrids enough to know that the electric motor is essentially 'parked' on road trips,used only for passing or hill-climbing.You need a low enough load to keep the engine in cylinder deactivation mode.And at that point,BSFC will only take you so far.