types internal combustion engines external combustion engines
TRANSCRIPT
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
ValvesOpen and Close
Ports
Internal Combustion Engines 4-Stroke Gas 2-Stroke Gas
4-Stroke Gas Engines
4 Stroke / CycleIntake CompressionPower 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
Easy to RefuelLight WeightInexpensive
ConsOnly 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:
Less Moving PartsLight WeightTwice as PowerfulOperating Position
Disadvantages:Frequent RebuildsPollutionBurns 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 FuelLiquid Fuel
Solid & Liquid Fuel
The End