Boost controller: Difference between revisions

Revision as of 14:57, 13 January 2022

Revision as of 01:43, 10 April 2022

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A boost controller can be a simple manual control which can be easily fabricated, or it may be included as part of the engine management computer in a factory turbocharged car, or an aftermarket electronic boost controller.

== Operation ==

== Electronic boost control ==

[[Image:3portsolenoid.jpg|thumb|220px|A 3-port pneumatic solenoid. This solenoid allows interrupt or blocking of the boost pressure rather than just bleed type control.]]

Electronic boost control adds an air control [[solenoid]] and/or a [[stepper motor]] controlled by an [[electronic control unit]]. The same general principle of a manual controller is present, which is to control the air pressure presented to the wastegate actuator. Further control and intelligent algorithms can be introduced, refining and increasing control over actual boost pressure delivered to the engine.

Most modern designs are ''electronic boost controllers'' that use an [[electronic control unit]] to control the boost via a [[solenoid]] or [[stepper motor]]. The operating principle is the same as older ''manual boost controllers'', which is to control the air pressure presented to the wastegate actuator. Electronic controllers add greater flexibility in management of boost pressures, compared with the manual controllers.

At the component level, boost pressure can either be bled out of the control lines or blocked outright. Either can achieve the goal of reducing pressure pushing against the wastegate. In a bleed-type system air is allowed to pass out of the control lines, reducing the load on the wastegate actuator. On a blocking configuration, air traveling from the charge air supply to the wastegate actuator is blocked while simultaneously bleeding any pressure that has previously built up at the wastegate actuator.