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Engines and Motors
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Types Internal Combustion Engines External Combustion Engines
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Internal Combustion-Basic Parts
Crankcase Crankshaft Piston Piston Rings Connecting Rod 4-Stroke Engine Valvetrain Camshaft Valves
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Crankcase Main Structural component of the engine.
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Piston Cylindrical part fitted in a cylinder
Transmits power created by the combusting fuel & air
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Piston Rings Seals the Piston to the Cylinder Wall
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Connecting Rod Links Crankshaft to Piston
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Crankshaft Converts the Linear motion of the piston to a Rotary motion.
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4-Stroke Engine-Valvetrain
Camshaft Operates Valves Valves Open and Close Ports
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Internal Combustion Engines
4-Stroke Gas 2-Stroke Gas
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4-Stroke Gas Engines 4 Stroke / Cycle Intake Compression Power Exhaust
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Intake Stroke Piston moves down drawing in fuel and air.
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4-Stroke Gas Engines - Intake
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4-Stroke Gas Engines - Compression
Piston moves up, squeezing the fuel and air
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4-Stroke Gas Engines - Compression
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4-Stroke Gas Engines - Power
Near Top Dead Center spark ignites the fuel and air combusting the vapor forcing the piston down.
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4-Stroke Gas Engines - Power
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4-Stroke Gas Engines - Exhaust
Piston moves up forcing out the spent gasses
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4-Stroke Gas Engines - Exhaust
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4-Stroke Gas Engines 4-Stroke In Action Pros Cons Easy to Refuel
Light Weight Inexpensive Cons Only 30% Efficient
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2-Stroke Gas Engines Completes the 4-cycles in 2-strokes No Valvetrain
Uses Transfer Ports
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2-Stroke Gas Engines 2-Stroke in action Advantages: Disadvantages:
Less Moving Parts Light Weight Twice as Powerful Operating Position Disadvantages: Frequent Rebuilds Pollution Burns Oil
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External Combustion Engines
Steam Engines Rocket Engines
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Steam Engines Steam engines were the first engine type to see widespread use. Used to pump water
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Steam Engines
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Rocket Engines Rocket engines are reaction engines. Two Types
Solid Fuel Liquid Fuel
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Solid & Liquid Fuel
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The End
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