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ChatGPT
Sep 12
Scavenging in mechanics refers to the process of removing exhaust gases from the combustion chamber of an engine and replacing them with fresh air or fuel mixture. This is typically done in two-stroke engines to improve efficiency and performance by ensuring that the combustion chamber is filled with a fresh charge of air or fuel mixture for the next cycle. Scavenging can be achieved through various methods, such as using a tuned exhaust system or a supercharger.
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Google Gemini AI
Sep 12
Scavenging in Mechanics
Scavenging refers to the process of removing spent or exhausted air or gases from an engine cylinder or combustion chamber after the combustion process has occurred.
Purpose:
- To create a vacuum or low-pressure area in the cylinder
- To facilitate the intake of fresh air or fuel mixture for the next combustion cycle
Types of Scavenging:
- Cross-Scavenging: Fresh air or fuel mixture is introduced from one side of the cylinder and exits from the opposite side, sweeping the spent gases away.
- Uniflow Scavenging: Fresh air or fuel mixture enters through a port at the bottom of the cylinder and exits through a different port at the top.
- Loop Scavenging: Fresh air or fuel mixture enters and exits through the same port, but the direction of flow changes, looping around the cylinder.
Scavenging Methods:
- Piston Scavenging: The piston moves down the cylinder, creating a vacuum that draws in fresh air or fuel mixture.
- Pump Scavenging: A separate pump is used to evacuate the spent gases and introduce fresh air or fuel mixture.
- Turbocharger Scavenging: A turbocharger uses exhaust gases to spin a turbine that drives a compressor, which forces fresh air or fuel mixture into the cylinder.
Benefits of Scavenging:
- Improved combustion efficiency by providing a more complete burn of fuel
- Increased power output by allowing more fresh air or fuel mixture to be introduced
- Reduced emissions by scavenging unburned hydrocarbons and other pollutants
Applications:
- Internal combustion engines: Diesel engines, two-stroke engines
- Compressors: Removes exhaust gases from the cylinder to improve compression efficiency
- Vacuum pumps: Removes air or gases from a sealed container
Scavenging refers to the process of removing spent or exhausted air or gases from an engine cylinder or combustion chamber after the combustion process has occurred.
Purpose:
- To create a vacuum or low-pressure area in the cylinder
- To facilitate the intake of fresh air or fuel mixture for the next combustion cycle
Types of Scavenging:
- Cross-Scavenging: Fresh air or fuel mixture is introduced from one side of the cylinder and exits from the opposite side, sweeping the spent gases away.
- Uniflow Scavenging: Fresh air or fuel mixture enters through a port at the bottom of the cylinder and exits through a different port at the top.
- Loop Scavenging: Fresh air or fuel mixture enters and exits through the same port, but the direction of flow changes, looping around the cylinder.
Scavenging Methods:
- Piston Scavenging: The piston moves down the cylinder, creating a vacuum that draws in fresh air or fuel mixture.
- Pump Scavenging: A separate pump is used to evacuate the spent gases and introduce fresh air or fuel mixture.
- Turbocharger Scavenging: A turbocharger uses exhaust gases to spin a turbine that drives a compressor, which forces fresh air or fuel mixture into the cylinder.
Benefits of Scavenging:
- Improved combustion efficiency by providing a more complete burn of fuel
- Increased power output by allowing more fresh air or fuel mixture to be introduced
- Reduced emissions by scavenging unburned hydrocarbons and other pollutants
Applications:
- Internal combustion engines: Diesel engines, two-stroke engines
- Compressors: Removes exhaust gases from the cylinder to improve compression efficiency
- Vacuum pumps: Removes air or gases from a sealed container
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Lionel Joey
Sep 20
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