What Causes the Hissing Sound During Turbocharged Acceleration?

[DamianRose]

Turbocharged acceleration produces a hissing sound, which is a normal operational noise of the turbocharger. A turbocharger is an air compressor that increases air intake by compressing air. It utilizes the inertial force of exhaust gases expelled by the engine to drive a turbine in the turbo housing. The turbine, in turn, drives a coaxial impeller that pressurizes air delivered through the air filter pipeline, forcing it into the cylinders. As the engine speed increases, the exhaust gas velocity and turbine speed also rise in sync. This allows the impeller to compress more air into the cylinders. The increased air pressure and density enable the combustion of more fuel, and by adjusting the fuel quantity and engine speed accordingly, the engine's output power can be enhanced.