Some time ago my brother told me he read an article where it was stated for best fuel efficiency it is better to accelerate strongly... but only to the point you get enough momentum to reach next corner, stop, etc., contrary to the general idea that it´s better to not accelerate (hit the throttle) too much.
He told me the article said once a petrol engine is consuming fuel, the difference is not that dramatic between hitting the throtle a 10% or 100%, so it´s better to take advantage of the available power to build some speed quickly and then release the throttle and use the big inertia of our heavy cars. Basically the idea is it´s more efficient to accelerate at 100% for 10% of the time/space than accelerating a 10% for 100% of the time/space. Obviously when I say accelerating at 100% I mean using all the power our engine can provide revving it up, not hitting the throttle to the end but doing an upshift at 3000rpm
It made sense to me, but I´d like to read a bit about that. He can´t remind where did he read it, anyone?
Does anyone know some graph for production cars wich shows fuel efficiency at different rpm? I guess that must be the key factor. When it´s said petrol engines efficiency is below 30% or even 20% I guess that´s reffering to its best regime, but it must be even lower at lower revs so if we want to be fuel efficient, we must use all the available power for as little time as possible
As you can see I´m saying all this from memory, and my memory sucks, so fell free to correct, add or laugh about this