Turbocharger is actually an air compressor, which increases the intake by compressing air. It uses the inertial impulse of the exhaust gas discharged by the engine to drive the turbine in the turbine chamber. The turbine drives the coaxial impeller, which presses the air sent by the air filter pipe to pressurize it into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the turbine speed also increase synchronously, and the impeller compresses more air into the cylinder. The increase of air pressure and density can burn more fuel. By increasing the amount of fuel and adjusting the engine speed, the output power of the engine can be increased.