Engines and Motors

Types Internal Combustion Engines External Combustion Engines

Internal Combustion-Basic Parts Crankcase Crankshaft Piston Piston Rings Connecting Rod 4-Stroke Engine Valvetrain Camshaft Valves

Crankcase Main Structural component of the engine.

Piston Cylindrical part fitted in a cylinder Transmits power created by the combusting fuel & air

Piston Rings Seals the Piston to the Cylinder Wall

Connecting Rod Links Crankshaft to Piston

Crankshaft Converts the Linear motion of the piston to a Rotary motion.

4-Stroke Engine-Valvetrain Camshaft Operates Valves Valves Open and Close Ports

Internal Combustion Engines 4-Stroke Gas 2-Stroke Gas

4-Stroke Gas Engines 4 Stroke / Cycle Intake Compression Power Exhaust

Intake Stroke Piston moves down drawing in fuel and air.

4-Stroke Gas Engines - Intake

4-Stroke Gas Engines - Compression Piston moves up, squeezing the fuel and air

4-Stroke Gas Engines - Compression

4-Stroke Gas Engines - Power Near Top Dead Center spark ignites the fuel and air combusting the vapor forcing the piston down.

4-Stroke Gas Engines - Power

4-Stroke Gas Engines - Exhaust Piston moves up forcing out the spent gasses

4-Stroke Gas Engines - Exhaust

4-Stroke Gas Engines 4-Stroke In Action Pros Cons Easy to Refuel Light Weight Inexpensive Cons Only 30% Efficient

2-Stroke Gas Engines Completes the 4-cycles in 2-strokes No Valvetrain Uses Transfer Ports

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

External Combustion Engines Steam Engines Rocket Engines

Steam Engines Steam engines were the first engine type to see widespread use. Used to pump water

Steam Engines

Rocket Engines Rocket engines are reaction engines. Two Types Solid Fuel Liquid Fuel

Solid & Liquid Fuel

The End