I noticed that my new car is by activated cruise controll at lets say 50 km/h handling this speed by displaying an current consume of 1.8~2.4 l/100km, while when I'm trying to find the required pressure to the peddal to keep the speed constant, I'm when I got there, at a consume of 2.2~2.9 l/100km.
Same for the high way: cruise controll: 3.9~4.9 l/100km at 120 km/h, while I get with the mentioned method at that speed 4.5~6.0 on average.
For speeding up 5 seconds to 125 and then falling back to 115 I have in the speeding up phase a consume of around 12 l/100km but it feels like I'm faster back on 115 then it takes me to speed up to 125 again, so making my consume even worse and also letting me asume its not a micro speed up followed by a micro moment of falling back what the cruise controll internally does.
But I noticed so far I don't feel comfortable with activating cruisecontroll in inner city, as it appears to me, this could let me get to break too late when its required. But I'd also like to optimize my consume in the city.
So in what way is the cruisecontroll algorithm probably controlling the engine for keeping the speed? Is this to be assumed the most efficent way? If not so what is the best patern to use my cars fuel most efficient when trying to keep a specific speed?
