Boost controller: Difference between revisions

Revision as of 22:36, 7 August 2014

Revision as of 01:45, 8 August 2014

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Many configurations are possible with 2-, 3-, and 4-port solenoids and stepper motors in series or parallel. Two port solenoid bleed systems with a [[PID controller]] tend to be common on factory turbocharged cars.

=== '''ADVANTAGE'''Advantages ===

Since less positive pressure can be present at the wastegate actuator as desired boost is approached the wastegate remains closer to a completely closed state. This keeps exhaust gas routed through the turbine and increases energy transferred to the wheels of the turbocharger. Once desired boost is reached, closed loop based systems react by allowing more air pressure to reach the wastegate actuator to stop the further increase in air pressure so desired boost levels are maintained. This reduces turbocharger lag and lowers [[Boost_(automotive_engineering)#Boost_threshold|boost threshold]]. Boost pressure builds faster when the throttle is depressed quickly and allows boost pressure to build at lower engine RPM than without such a system.