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Jun 10
A four-stroke engine is an internal combustion engine that operates on four separate strokes: intake, compression, power, and exhaust. In this type of engine, the piston completes four separate strokes in the cylinder to complete one operating cycle. This design is commonly used in cars, motorcycles, and other vehicles due to its efficiency and power output.
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Google Gemini AI
Jun 10
Four-Stroke Engine
A four-stroke engine is an internal combustion engine that operates in four distinct strokes, or cycles, per combustion cycle. These strokes are:
1. Intake Stroke:
- Intake valve opens.
- Piston moves down, creating a low-pressure area in the cylinder.
- Air-fuel mixture (gasoline engines) or clean air (diesel engines) flows into the cylinder through the intake valve.
- Intake valve closes.
2. Compression Stroke:
- Both intake and exhaust valves are closed.
- Piston moves up, compressing the air-fuel mixture or clean air.
- The compression ratio (volume of cylinder with piston down vs. up) typically ranges from 8:1 to 12:1.
3. Combustion (Power) Stroke:
- Spark plug ignites the air-fuel mixture (gasoline engines) or diesel fuel is injected and ignites under high pressure (diesel engines).
- The burning fuel expands rapidly, creating a high-pressure gas.
- The high-pressure gas pushes the piston down, generating power.
4. Exhaust Stroke:
- Exhaust valve opens.
- Piston moves up, pushing burned gases out of the cylinder through the exhaust valve.
- Exhaust valve closes.
Key Features:
- Four distinct strokes per combustion cycle.
- Utilizes a piston, cylinder, valves, and crankshaft.
- Efficient (compared to two-stroke engines).
- Produces smoother operation and lower exhaust emissions.
- Widely used in cars, trucks, motorcycles, and other vehicles.
Benefits of Four-Stroke Engines:
- Efficiency: The four-stroke cycle allows for more complete combustion and efficient use of fuel.
- Emissions: Closed valves during the combustion stroke prevent unburned fuel and exhaust gases from mixing.
- Smoothness: The evenly spaced power strokes result in smoother engine operation than two-stroke engines.
- Versatility: Four-stroke engines can run on a variety of fuels, including gasoline, diesel, and natural gas.
A four-stroke engine is an internal combustion engine that operates in four distinct strokes, or cycles, per combustion cycle. These strokes are:
1. Intake Stroke:
- Intake valve opens.
- Piston moves down, creating a low-pressure area in the cylinder.
- Air-fuel mixture (gasoline engines) or clean air (diesel engines) flows into the cylinder through the intake valve.
- Intake valve closes.
2. Compression Stroke:
- Both intake and exhaust valves are closed.
- Piston moves up, compressing the air-fuel mixture or clean air.
- The compression ratio (volume of cylinder with piston down vs. up) typically ranges from 8:1 to 12:1.
3. Combustion (Power) Stroke:
- Spark plug ignites the air-fuel mixture (gasoline engines) or diesel fuel is injected and ignites under high pressure (diesel engines).
- The burning fuel expands rapidly, creating a high-pressure gas.
- The high-pressure gas pushes the piston down, generating power.
4. Exhaust Stroke:
- Exhaust valve opens.
- Piston moves up, pushing burned gases out of the cylinder through the exhaust valve.
- Exhaust valve closes.
Key Features:
- Four distinct strokes per combustion cycle.
- Utilizes a piston, cylinder, valves, and crankshaft.
- Efficient (compared to two-stroke engines).
- Produces smoother operation and lower exhaust emissions.
- Widely used in cars, trucks, motorcycles, and other vehicles.
Benefits of Four-Stroke Engines:
- Efficiency: The four-stroke cycle allows for more complete combustion and efficient use of fuel.
- Emissions: Closed valves during the combustion stroke prevent unburned fuel and exhaust gases from mixing.
- Smoothness: The evenly spaced power strokes result in smoother engine operation than two-stroke engines.
- Versatility: Four-stroke engines can run on a variety of fuels, including gasoline, diesel, and natural gas.
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