Two stroke Engines
How do two stroke engines work, which are very popular for their high power to weight ratio in microlight planes ???
Sounds like a silly question ?
OK, a little more detailed :
I am running a two stroke with reduced power, lets say at 15 inch hg manifold pressure. The Piston has reached its position nearest to the crankshaft and both ´valves´ are open, so the crankcase housing containing fresh air fuel mixture, the cylinder and the exhaus pipe and muffler are connected to each other.
Now I have fresh air fuel mixture with 15 in hg in the crankcase and air with 30 in hg at the outermost end of the exhaust.
What makes the exhaust go to the higher pressure and makes the mixture comming into the cylinder (from low to high pressure) ???? How do I force all the exhaust gas to leave the cylinder (because if too much remains, the mixture will not burn if ignited)
Someone able to explain this kind of magic ?