EV Switch

Try to find the info on the warm up stages with the stages 1A and 1B.

 

It may not help you all that much if the engine comes on and *begins*
to warm up as you drive after the bottom of the hill. It still has
to go through warmup stage, although you may be able to use a little
more of its output for propulsion. But whether it's a prius or any
other car, you really shouldn't put a heavy load on a cold engine.o

Not to discourage EV-button use when appropriate, but how 'bout
this: start it in the driveway and proceed gently to the top of
the hill in question. Pull over and stop at a place from which you
can effectively coast down from with no gas applied, and wait for
the engine to reach 140deg and shut itself off. Now, let the creep
get you rolling again, and the engine shouldn't light all the way
down the hill but will be at least somewhat warmed up at the bottom.
.
_H*

 

Kick on the ice at the top of the hill. Let the engine run through it's warm-up on the way down. I am in a similar situation where I have a downhill to go on before i hit the main roads. Usually, i'll EV all the way to the top of the hill. By the time I get there, the ICE will come on and it'll warm up on it's way down the hill. The MFD usually reads 2.0L/100km as it makes it's way down the hill.

 

I have a stretch of road on my route to work which is slightly up hill, followed by a long stretch of flat.

I kick in the EV during this stretch and by the time I get to the end, I'm usually down to the purple bars. The next stretch of road is all down hill for several miles, and the battery is almost charged by the time I get to the bottom.

Using that technique, I routinely improve my gas mileage by several tenths. Doesn't sound like much, but it sure makes me feel better when I get to the office.