The successful series 1163, the engine of MTU with the highest power density for marine applications, has to be modified to gain the upcoming emission standards. Up to now the engine has been equipped with an established Pump Line Nozzle Injection system. Since the emissions are essentially influenced by the injection system some modifications are required. The system needs a more flexible and faster switching with higher injection pressure and also the capability of multiple injections to reduce noise, NO(x)-emissions and soot. The injector, the heart of the new Common Rail injection system, has been developed by L'Orange in close cooperation with MTU. To reduce development costs and time but achieve highest performance and durability the injector is based on the third generation of L'Orange's injection systems for high-speed engines. Since 2011 injectors containing such principles are part of the trend setting fourth generation of the MTU series 4000. The main feature of the injector is the integrated accumulator with the control valve close to the nozzle, known from previous L'Orange injector generations. With an optimized injector design the maximum injection pressure and the capability of multiple injection can be significantly improved. Due to a new control valve design the injector becomes more robust and thereby the injection quantity more stable over the whole lifetime. In a first step the injector will run with 1800 bar e.g. for the IMO TIER II requirement. The injected quantity is splitted in a pilot and a main injection to reduce NO(x)-emissions, fuel consumption and the load of the engine parts. Possibly in a second step the engine fulfills further upcoming emission legislations. Therefore the injector is already designed for a maximum injection pressure of 2500 bar. Additionally as a new feature the detection of the beginning and end of the injection will be integrated. This leads to an almost drift free injector and the possibility to realize minimal injection quantities with highest accuracy This injector will be another milestone in the long history of L'Orange trend setting innovations. The engine with the new injection system will go in series production in August 2013.


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    Title :

    New platform based Common Rail Injector for MTU series 1163


    Contributors:


    Publication date :

    2013


    Size :

    7 Seiten, 18 Bilder, 1 Quelle


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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