The purpose of this master thesis is to investigate the possibility to refine the control system of turbochargers in petrol engines by introducing turbo speed measurement. This thesis also investigates possible control enhancement from an electric wastegate actuator compared with a traditional pneumatic actuator. During the thesis work the control problem is divided into 3 sub systems: boost pressure controller, turbo speed controller, and electric actuator controller. The design procedure of the controllers follows model-based method in which a simulation model for engine and a simulation model for electric actuator are used. The designed controller is then implemented and evaluated in an engine test cell. The result of the thesis work shows that the electric wastegate actuator is preferred as it delivers consistent actuation speed and accurate positioning which favours model-based design that requires exact wastegate position. Although the purposed controller structure that uses turbo speed measurement cannot yet achieve faster generation of boost pressure by the end of the thesis work, the use of turbo speed sensor as controller feedback still shows potential to enhance the boost controller and ease the controller design, as the turbo speed measurement can reflect the boost pressure faster and is less sensitive to the disturbances in the air flow.


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    Titel :

    Boost Control with Turbo Speed Sensor and Electric Wastegate


    Beteiligte:
    Holmbom, Robin (Autor:in) / Liang, Bohan (Autor:in)

    Erscheinungsdatum :

    2016-01-01


    Medientyp :

    Hochschulschrift


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629




    Isuzu's New 12.0L Turbocharged Diesel with Wastegate Boost Control for Fuel Economy

    Okada, Kenji / Takatsuki, Toshiaki | SAE Technical Papers | 1982


    Isuzus New 12,0 l Turbocharged Diesel with Wastegate Boost Control for Fuel Economy

    Okada,K. / Takatsuki,T. / Isuzu Motors,JP | Kraftfahrwesen | 1982