Re: OK BOYZ! 4-H tractor project ??'S

Posted by Nebraska Cowman on May 06, 2005 at 15:57:18 from (65.162.146.167):

In Reply to: OK BOYZ! 4-H tractor project ??'S posted by Farmallkid From Ont, on May 06, 2005 at 11:49:35:

if you understand how an engine works Mitch it ain't no big deal. You do know how a 4 cycle engine runs?
OK here is the simple version. (I will assume you know how a crankshaft works to change back and forth motion to rotory motion.)
piston going down creates vacume and sucks in air wich drawn through the carburetor is mixed with fuel vapors. As piston comes back up (the flywheel is creating inertia to keep things rolling) the air fuel mixture is compressed and just as it reaches it's upmost an artificial spark ignites the flamable mixture and wham! the piston is forced downward with much force creating the power. on the return stroke the exaust gasses are pushed out and the cycle starts over again. valves are used to control the flow of the intake fuel and the exaust gasses at the correct time. Pretty simple hunh?

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