> What I was thinking if that is
> possible to write a firmware to save fuel based on intelligent accelerati=
on?

I seem to recall that Porsche looked at most economical methods and
decided that rapid acceleration to target speed was better than a slow
increase.

 Your slowing up hills and accelerating down is  a variant of the time
honoured  "Rolls canardly" method. (Rolls down one side and can 'ardly
get up the other).

Long ago I had an accident that punctured a vehicles radiator. The car
was probably dead anyway and I decided to try and get it home as was.
Most of the trip was on a motorway - including crossing out steeply
humped harbour bridge. I accelerated to slightly above legal speed
limit (we have a 10 kph allowed tolerance) as rapidly as possible and
then shut off the engine and coasted until speed dropped to too low
fro comfort on a motorway. It was interesting to see how little the
engine seemed to need to be used. I got the vehicle home - a distance
of about 20 km - without any evident engine distress. - although the
lack of engine water would lead to the temperature gauge not reading.
Not a method I'd recommend except in dire emergencies, but it seemed
to work. It would be interesting to know what amount of heating
occurred.

Long long long ago I was driving an old (1951?) side valve Hillman
home from work when it started behaving badly. I pulled over and there
was a strange crackling and popping sound from the engine. Bonnet
(hood) up and - oh dear - smoke pouring from the engine. I then
realised that the sound was oil boiling ! :-).
The cooling system had lost all water during the day and there was no
indication of this until the engine started to "tighten up"  [tm].
After cooling system repairs the car continued to give good service.


            Russell
--=20
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