Four- Stroke Small Engines

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Presentation transcript:

Four- Stroke Small Engines Transportation Mr. O

Components Recoil Start- Pull start system, connects to flywheel/crankshaft. Flywheel- Large wheel mounted to crankshaft, stores momentum to keep engine running. Contains magneto

Components (cont’d) Crankshaft- Transfers piston motion into rotation. Used as engine output.

Components (cont’d) Piston-creates combustion Inside chamber. Piston rings -add compression/ clean cylinder walls. *Connecting Rod- Connects piston to Crankshaft.

Components (cont’d) Camshaft- rotate to open and close valves. Timing gear- Spin to control opening/closing of valves.

Components (cont’d) Intake valve- opens and closes to allow air fuel mixture to enter. Exhaust valve- opens and closes to allow exhaust to escape.

Components (cont’d) Sparkplug- fits into cylinder head and ignites compressed fuel/air mixture. Magneto- device which generates electric current when rotated. Coil- (ignition coil) converts low voltage into high voltage needed for spark plug.

Components (cont’d) Fuel Tank- Stores gasoline Air cleaner- Connects to carburetor, cleans incoming air. Carburetor- regulates fuel intake and fuel air mixture.

How 4 strokes work: