Downsizing and turbocharging for retaining the maximal power is a common approach to improve the fuel economy of SI internal combustion engines. Due to the additional turbocharger dynamics, small engines suffer from a significant time lag of the torque build-up. The injection of pressurized air into the combustion chamber during the compression phase, also called direct-boost, can recover the driveability. Thus far, expensive and complex fully variable valve-trains have been proposed for the air exchange between the air tank and the combustion chamber. In this paper, a direct-boost system using a camshaft driven valve is designed. An appropriate control strategy is presented. The transient performance of the complete system and the feasibility of the control strategy are demonstrated on a modified 0.75 l turbocharged two-cylinder test bench engine.


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    Title :

    System Design for a Direct-Boost Turbocharged SI Engine Using a Camshaft Driven Valve


    Additional title:

    Lect. Notes Electrical Eng.


    Contributors:


    Publication date :

    2012-11-07


    Size :

    12 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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