Turbocharger Wastegate Regulating Valve Solenoid

The turbocharger wastegate regulating valve solenoid allows the PCM to control the turbocharger wastegate position. The turbocharger wastegate regulating valve solenoid controls the vacuum supplied to the pneumatically actuated wastegate diaphragm in order to control the boost pressure limit. When the compressor outlet pressure increases, a pneumatically powered actuator opens the turbocharger wastegate and limits the compressor outlet pressure. The turbocharger wastegate regulating valve solenoid supplies vacuum to the pneumatically actuated wastegate canister diaphragm, which regulates the boost pressure to the desired value.

For the normally open vacuum actuated turbocharger wastegate, the turbocharger wastegate regulating valve solenoid controls vacuum applied to the turbocharger wastegate actuator. The amount of vacuum applied to the turbocharger wastegate actuator allows the PCM to control the boost pressure. To generate maximum boost pressure, the PCM controls the turbocharger wastegate regulating valve solenoid to apply full vacuum to the turbocharger wastegate actuator. Boost pressure levels are controlled by regulating vacuum to the wastegate actuator. The spring pressure in the turbocharger wastegate actuator defaults the turbocharger wastegate to a fully open position.