MPG Cruise Control Algorithm

[GasSavers_maximilian]

Tried driving according to my algorithm and I quickly noticed an area of ambiguity: coasting down shallow hills. As long as the hill is steep enough to keep the speed above the level cruising speed (between 50-55 mph) then it's fine, but what if speed drops below that? Right now the algorithm would add the small amount of power needed to maintain the level cruising speed down the hill. Is the best course of action to coast down all the way to the minimum allowable speed and then go back into powered mode? That approach seems to fit in with pulse and glide methodology better and it's what I'm doing right now when I drive manually: milk the decline for all it's worth. Hill detection would be easy just by examining the speed vs throttle position history data.

Also, thought over a simplified form of pulse and glide that doesn't require GPS to automate. Seems like you'd just carry out a normal pulse and glide routine, interrupting pulses if you encountered an uphill stretch. Does that make sense to those of you familiar with it? If so, I can boil that down to another pseudo code description. Thanks a lot.