2 stroke engins

HOW DOSE A TWO STROKE ENGIN WORK?

a two cycle works alot diffrently to a 4 stroke system as the combustion happens through the whole block and the fuel and oil are mixed. a 2 stroke cycle works by drawing the fuel in through the inlet valve  and in to the crank casinging, on its down force the fuel is forced around the blosk and into the top of the block, the piston pushes back up compressing the fuel, the spark plug ignites the fuel sending the  piston on its down stroke and forcing the exhaust fumes out through the exhaust port. unlike a four stroke the oil stays in the sump and crank case to keep the  piston and cylinders lubricated, the fuel and air mix is let into the top of the boar by valves wich is then compressed and ignited by the spark plug. below the piston fuel and air is used to lubricate the crank and bearings, above the piston is were the combression and power comes from as it is were the fuel is ignited by the spark plug.  scavenging is  the revolution of the two stroke using the beginning of the compression stroke and the end of the combustion stroke.

BEARINGS

 special types of bearings need to be used in a two stroke  as using the same ones as a four stroke will seas becasue the oil is mixed with the fuel in a two stroke and needs a more inderpenit bearing. roller bearings and  closed case ball bearings are used as they are self lubricated and can circulate easy with out the need of oil to lubricate them.