Talon AWD L4-1997cc 2.0L DOHC Turbo (1991)
Wastegate: Description and Operation
Turbo Charger Assembly Components
The wastegate actuator valve (item 2) is a boost pressure operated device that opens and closes the internally mounted bypass valve (wastegate) in the
drive turbine housing of the turbocharger. The wastegate actuator valve is spring loaded to the closed (highest boost) position. Under normal operating
conditions the wastegate is controlled directly by boost pressure. As boost pressure rises (on the throttle side of the throttle valve), the pressure against
the diaphragm overcomes the preset spring pressure holding the wastegate closed. As the wastegate is forced open it vents exhaust (drive) pressure
around the drive turbine. This limits the maximum pressure that the turbocharger can build in the intake system.