Quote:
Originally Posted by bwilson4web
At highway speed, 65 miles per hour, and using a 'water noodle' lower grill block, the car reached thermal equilibrium within 30 minutes. Thereafter, the changing temperature effects were visible on in the MPG display. BTW, aerodynamic drag is proportional to the air density, which was a function of the air temperature. I was driving from one edge to the other edge of a high pressure sensor.
The fuel-air mixture is handled by mass-flow sensor and the Atkinson cycle pushed part of the charge from the hot cylinder back into the hot manifold. It is pretty well warmed up during the evaporation cycle. You're normally right about heat being needed at lower speeds but at 65 miles per hour the energy demands provides a surplus of waste heat.
Bob Wilson
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I guess I wasn't even thinking about anything at highway speeds because EV isn't even possible (at least in my FEH - is it possible to go EV at highway speeds in a Prius?) so it really becomes irrelevant in that case.
I was considering the cases where EV
should be possible, but the minimum temperature requirements programmed into the system will not allow it so the engine is forced into ICE-on condition in order to maintain adequate temperatures.