A dump valve, also known as a blow-off valve (BOV), is a crucial component in turbocharged engines. Its primary function is to release excess boost pressure when the throttle is closed, preventing compressor surge and protecting the turbocharger. Here’s a detailed overview:
Functions
Pressure Release: When the driver closes the throttle (e.g., during gear changes), the dump valve opens to release excess pressure from the intake system, preventing back pressure on the turbo.
Compressor Surge Prevention: By venting excess boost, it helps avoid compressor surge, which can damage the turbocharger over time.
Improved Turbo Response: Keeping the turbo spinning by preventing pressure buildup allows for quicker spool times when the throttle is reopened.