Boost controller: Difference between revisions

Revision as of 23:57, 15 April 2022

Revision as of 00:17, 16 April 2022

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=== Advantages ===

By keeping the wastegate in a closed position more often, a boost controller causes more of the exhaust gas to be routed through the turbocharger, thus reducing [[Turbocharger#Turbocharger_lag|turbo lag]] and lowering the [[Boost (automotive engineering)#Boost threshold|boost threshold]].{{citation needed|date=April 2022}} A boost controller also reduces the need for a stiffer spring to be used in the wastegate.{{citation needed|reason=References are needed to show what benefits this results in.|date=April 2022}}

=== Disadvantages ===

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To prevent excessive boost pressures in the event of a failure, the boost controller needs to be designed such that [[failure mode]] do not result in any pressure being bled off. For instance, a solenoid-type boost controller should direct all air to the wastegate when it is in the non-energized position (the common failure mode for a solenoid). Otherwise, the boost controller could get stuck in a position that lets no boost pressure reach the wastegate, causing boost to quickly rise out of control.

Also, the electronic systems, extra hoses, solenoids and control systems add cost and complexity. Nonetheless, in recent times most automobile manufacturers use boost controllers on their turbocharged engines.{{citation needed|date=April 2022}}

== Alternatives ==