Presentation on theme: "Two-Stroke Engine Less moving parts: Piston Crank shaft Reed valve"— Presentation transcript:
1 Two-Stroke Engine Less moving parts: Piston Crank shaft Reed valve Oil is mixed in fuel for lubrication,Hence engine can operate at any angleRuns hotter , quicker in acceleration,and lighter in weight then 4-stroke.Top of the piston is wedged shape inorder to help incoming gases to enterand exhaust gases to escape.Get fewer miles per gallon
2 Operation of two-stroke engine The two stroke engine employs the crankcase aswell as the cylinder to achieve all the elements ofthe cycle in only two strokes of the piston.360 degrees rotation of crankshaftcompletes the cycle.
3 Intake & Compression stroke Intake. The fuel/air mixture is first drawn intothe crankcase by the vacuum created during theupward stroke of the piston through the reed valve.Compression. The piston then rises, driven byflywheel momentum, and compresses the fuelmixture. (At the same time, another intake strokeis happening beneath the piston).
4 Power & Exhaust/Transfer Stroke Power. At the top of the stroke thespark plug ignites the fuel mixture.The burning fuel expands, drivingthe piston downward.Exhaust/Transfer:Toward the end of the stroke,the piston exposes the intake port, allowing thecompressed fuel/air mixture in the crankcase toescape around the piston into the main cylinder. This expels the exhaust gasses out the exhaustport, usually located on the opposite side of thecylinder.