What is the sound like air being released when the car's accelerator is released?
1 Answers
Releasing the accelerator and hearing a sound like air being released is the sound of the pressure relief valve working. The following explains the reasons: 1. Turbocharger working principle: When the turbocharger starts working as the accelerator is pressed, it compresses a large amount of air and pushes it into the engine combustion chamber through the throttle valve. When the driver releases the accelerator pedal, the throttle valve closes. However, the turbocharger's blades do not stop working immediately. At this time, there is still residual compressed air in the intake pipe between the turbocharger and the throttle valve. If this air is not discharged in time, the strong pressure can cause damage to the throttle valve and turbocharger blades. 2. Function of the pressure relief valve: The valve of the pressure relief valve will release the residual compressed air in the pipe in time when it detects that the air pressure in the intake pipe is too high, thereby protecting the throttle valve and turbocharger blades. It also reduces the occurrence of turbo lag, making the engine work more smoothly. The sound of air being released that you hear is the 'noise' produced when the pressure relief valve discharges the compressed air.
