Thank you guys.
"Selfcharging" i will try to explain you how it works.
I got this idea during building this engine but my idea is not proved
yet because i am waiting for suitable carburetor .
Selfcharging utilizes pressure changes in crank case .
There is only one additional item - the one way membrane valve
positioned between carburetor and crank case.
In this type of engine pistons move 300 degree simultaneously
so they create low and high pressure in crank case.
When pistons move up they create low pressure in crank case
and suck fuel mixture through carb and open membrane valve
into crank case.
When pistons move down the membrane valve is closed and fuel is forced
through open inlet valve into cylinder which has suction stroke right now.
So Two pistons feed only one cylinder.
Next turn Two pistons feed second cylinder and so on.
I hope you will understand what i have described because English is not my mother language.
Have a nice day
Kadora