2006-09-22 18:46:15 · 3 answers · asked by kpsbth 2 in Cars & Transportation ➔ Car Audio
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2-stroke engine burns a mixture of air, petrol and oil to drive a piston and rotate a crankshaft. Unlike a 4-stroke engine, a 2-stroke engine fires on every revolution of the crankshaft and performs all the functions of a 4-stroke engine (induction, compression, combustion and exhaust) using only a combustion and a compression stroke.
It does this by inducting the fuel mixture into the crankcase towards the end of the compression (upward) stroke and releasing the exhaust gases towards the end of the combustion (downward) stroke. A transfer port allows the fuel mixture in the crankcase to escape around to the top of the piston where it purges the main cylinder of exhaust gases before being finally compressed by the upward moving piston.
For picture goto the below link
http://www.sphaera.co.uk/two-stroke.htm
2006-09-22 18:51:03 · answer #1 · answered by mallimalar_2000 7 · 3⤊ 0⤋
Piston drops creating vacuum, drawing in air/ fuel. Piston rises compressing mixture. Ignition, piston forced down, before bottom exhaust, and then intake, up compression. etc...
Four stroke clears for one cycle then intake.
Wait if the next guy is right (and he is) I don't know anything about 2 stroke, crankcase induction? I definitely didn't know that. So you got compession in the cylinder and then the crankcase! Makes sense, both sides of the piston, pretty cool. I guess thats why you need combustable oil in a 2 stroke. Learn somethin every day, thanks Mallimalar. (Good links too) I bet the kid in the picture is gonna be a master mechanic. Or a master of anything they want if they got dads genes.
2006-09-23 01:50:23 · answer #2 · answered by ferdinand 3 · 1⤊ 0⤋
What mali... said but 2 stroke is more smelly and noisy, and less efficient than most 4 stroke engines and are mostly used when their smaller physical size is beneficial to the application.
2006-09-23 02:05:06 · answer #3 · answered by Neil S 4 · 1⤊ 0⤋