Can anyone explain in detail how a two stroke engine works?
Answers:
http://science.howstuffworks.com/two-str.
http://library.thinkquest.org/c006011/en.
http://en.wikipedia.org/wiki/two-stroke_.
one of the above diagrams should help
oh! well that ain't no fun! awake so long i'm actually getting funny!
its got two strokes, up and down, on the inlet stroke,(induction) it takes fuel from the carb, squirts it into thte top of the piston where it is compressed and ignited by the sparkplug, the piston id forced downwards and the exhauist gasses exit thru the exhaust port.
modern 2 strokers have reed plates to help control the hign revs and fuel requirements.. but thats it.oh, and they need UHCL or 2 stroke oil or the piston siezes in the bore.
is this enough info? wikipedia will explain it better.
What do you want to know ? The Intake stroke pulls the fuel/air mixture through the reed valves, the compression stroke compresses it and the spark plug fires igniting the mixture and pushes the piston back down.ect..ect.ect.
gas/oil mixture go into the cylinder. the piston compresses it, the spark plug fires causing the mixture to explode which in turn pushes the piston down giving power to the transmission/gearbox. the piston then goes back up to push out the exhaust gases. On it's downward stroke this time it starts the cycle over by pulling more gas/oil into the cylinder.
In simple terms, in a 2 stroke engine, you have ports on either side of your engine Inlet/Exhaust and on the inside a transfer port. Your 1st stroke is a combination of Induction and Compression, the 2nd stroke Ignition and Exhaust. The piston controls when the ports are opened and closed.
pretty simple really, air fuel mixture comes thru the carb into the engine, through a reed valve[there are no poppet valves] under the piston, the piston comes down forcing the mixture back up top through a transfer port and then the plug fires the mixture.exhaust goes out another reed valve.the 2 stroke engine makes power on every single crankshaft revolution.
look at this
When the piston goes up it creates a vacuum in the crankcase. The carbuerator feeds directly into the crankcase through a one-way valve (reed valve). Obviously the piston going up also accomplishes the ignition stroke and BANG.
When the piston goes down it creates pressure in the crankcase. The gasses in the crankcase flow up into the combustion chamber through vents machined into the cylinder wall which are exposed when the piston is in it's low position.
The gasses going up from the crankcase displace the exhaust gasses remaining from the previous ignition cycle. It's not a perfect expulsion of exhaust, but hey, it's good enough to fill the cylinder with enough fuel-air mixture to ignite & create another BANG.
And the process repeats: BANG-squish-whoosh-suck-BANG-s. etc. etc. etc.
Just like a 4 stroke - suck squeeze bang blow, only the suck occurs below the piston in the crankcases and the squeeze bang and blow occur in the cylinder in one revolution of the crank.
Every internal combustion engine works with 4 cycles, whether it's a lawnmower engine or Rolls Royce Trent (Boeing 777 jet engine).
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