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A turbocharger is actually an air compressor that compresses air to increase the amount of intake air. It uses the inertial impulse of exhaust gas discharged from the engine to propel the turbine inside the turbine chamber, which in turn drives a coaxial impeller that pressurizes the air sent by the air filter pipe into the cylinder. When the engine speed increases, the exhaust gas discharge speed and turbine speed also increase synchronously, and the impeller compresses more air into the cylinder. Increasing the pressure and density of the air can burn more fuel. By increasing the amount of fuel and adjusting the engine speed accordingly, the output power of the engine can be increased.