This paper is about the influence of engine mount positions within vehicles in general, especially for transversally installed engines. The general comfort behavior was analyzed for several common but different mounting systems. For transversal installed engine the so called Torque-Roll-Axis (TRA)- system is most common at european car manufacturers including certain drawbacks. Based on this TRAsystem an advanced system design, called Stiffness-Axis-Method was developed, first on an analytical description, later on improved by experimental and simulation-based studies. The so far known TRA-design is a special case of the SAM-design. SAM therefore is a tool to describe best mount positions depending on engine properties and mount characteristics, respectively vice versa for all kinds of rotational vibrating propulsion systems. This paper is a very short overview and based on the book described in the chapter Further Information.The mapping and evaluation of this new SAM development tool via experimental tests as well as nonlinear modelling of the multi-body-system show an optimization potential of up to 80 %, a precision of forecasting the position of 15 mm and the mount stiffness of 25 N/mm for different engine speed regions. Thereby these parameters are within the size of engine mounts respectively the stiffness spread of standard factory. This signifies the conventional TRA-setup was tremendously improved by giving a larger scope for development regarding stiffness and location of mounts. This leads into better NVH and cost-effective development processes and lower purchase price for parts. The transfer of the method to a non-automotive mounting system was also successfully investigated.


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    Title :

    Simulated and measured influence of engine mount positions and design on NVH-behavior


    Contributors:


    Publication date :

    2008


    Size :

    15 Seiten, 10 Bilder, 3 Tabellen, 34 Quellen



    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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