Moteur Thermique

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The Principle of Operation of a Thermal Engine A thermal engine is a type of engine that converts thermal energy into mechanical work through the expansion and contraction of gases. The process begins with the combustion of fuel, typically in the form of gasoline or diesel, which releases heat energy into the engine's cylinder. Air, drawn into the cylinder by the engine's intake valves, is then compressed by the piston, causing its temperature to rise rapidly. This compression also increases the pressure inside the cylinder, preparing it for the subsequent ignition of the fuel-air mixture. When the spark plug ignites the fuel-air mixture, a small explosion occurs, forcing the piston downward and ultimately turning the crankshaft. As the piston moves upward again, driven by the force of the explosion, it draws air into the cylinder once more, repeating the cycle. The thermal engine's efficiency is determined by its ability to convert the heat energy released during combustion into useful mechanical work. Factors such as compression ratio, fuel type, and engine design all play a crucial role in maximizing this conversion rate.