Submitted by soma on July 18, 2013
Hi all --
Some engineering questions for the knowledgeable ones out there -- just curious about the energy efficiency of the motor and brakes at different speeds?
Context is that I'm familiar with driving my Prius, where:
1) I try to keep acceleration as much on electric as possible when starting from stopped, because MPG of the gas engine clearly changes with the effective gear in use, and
2) when braking, I try to brake as early as possible because (I believe) if too heavy brake is applied, it will revert to mostly mechanical braking.
So my questions are:
1) For a purely electric motor, is MPG basically flat at all speeds? Therefore, no need to start off slowly and "get into higher gears" as soon as possible?
2) What's the balance of mechanical vs regenerative braking balance vs. brake pedal actuation? Is it possible to set the balance to more regen? Will I still need to brake early and lightly to maximize the regen, and not send it into purely mechanical braking?
Thanks for helping my curiosity!