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FAQs on Introduction: Internal Combustion Engine - Topper Handwritten Notes & Videos for GATE ME - Mechanical Engineering

1. What is an internal combustion engine?
An internal combustion engine is a type of heat engine that converts the chemical energy stored in fuel into mechanical energy. It operates by burning fuel inside a combustion chamber, which generates high-pressure gases that drive a piston, producing linear motion.
2. How does an internal combustion engine work?
An internal combustion engine works by following a four-stroke cycle: intake, compression, combustion, and exhaust. During the intake stroke, the piston moves downward, drawing in a mixture of fuel and air. In the compression stroke, the piston moves upward, compressing the mixture. Ignition of the compressed mixture occurs during the combustion stroke, causing a rapid expansion of gases that pushes the piston downward. Finally, in the exhaust stroke, the piston moves upward, expelling the exhaust gases.
3. What are the main components of an internal combustion engine?
The main components of an internal combustion engine include the cylinder, piston, crankshaft, connecting rod, combustion chamber, valves, spark plug, and fuel injection system. The cylinder houses the piston, which reciprocates inside it. The crankshaft converts the linear motion of the piston into rotational motion. The connecting rod connects the piston to the crankshaft. The combustion chamber is where the fuel ignites, and the valves control the intake and exhaust of gases. The spark plug provides the ignition spark, and the fuel injection system delivers fuel into the combustion chamber.
4. What are the advantages of internal combustion engines?
Internal combustion engines offer several advantages. They are compact and lightweight, making them suitable for various applications. They have high power-to-weight ratios, allowing for efficient power generation. They can operate on various fuels, including gasoline, diesel, and natural gas. Internal combustion engines are also relatively simple in design and can be mass-produced at a lower cost. Additionally, their widespread use has led to the development of a vast infrastructure for fuel supply and maintenance.
5. What are the limitations of internal combustion engines?
Internal combustion engines have some limitations. They produce emissions, including carbon dioxide, nitrogen oxides, and particulate matter, contributing to air pollution and climate change. They have lower thermal efficiency compared to other types of engines, resulting in energy losses. Internal combustion engines also require regular maintenance and produce noise and vibration. Their reliance on fossil fuels raises concerns about resource depletion and the environmental impact of extraction and refining processes.
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