This contribution presents new ways to reduce the interaction between engine and body, for what concerns acoustic quality, will be treated taking into account new processes and approaches, new tools for the virtual prototyping and new vehicle architectures. The design of cars for perceived quality has become reality by the definition and implementation of an integrated engineering process spanning from product definition to the specification of the components. The building blocks of such process are the procedures for Quality Indices, Target Setting-Deployment and finally Target Achieving, and have been fully developed and implemented for the NVH aspects. The application of such process offers great advantages in terms of costs and lead time for the development of conventional vehicles as well as for new concepts such as the dual frame example described. To effectively apply the above process, it is important to be able to predict by dedicated models all the important noise aspects on a vehicle, so that new methods and tools for virtual simulation have to be developed and improved. The complexity regarding the human subjective response and the mathematical modelling of acoustic behaviour of the complete vehicle, even for the different individual sources (engine, road, etc.) represents an obstacle to the implementation of this approach with times and costs acceptable for a specific vehicle development programme. To simplify this problem, a possible approach is the definition in a systematic way, based on experimental tests and product experience, of a complete set of target levels, tor vehicle, subsystems and components, related to acoustic and vibration quality (although the same concept could be extended by analogy to other performance criteria), easy to be controlled during the development process; these targets must be specified prior to the detailed design of a new model and is a function of its targeted position in the marketplace, the desired defining characteristics and intended price. Correspondingly it is necessary to modify also the technical design and organisation processes involved in the development of a new vehicle in order to make it possible to monitor and evaluate the achievement of the specified targets. This is particularly important when the various subsystems and components which influence the NVH performance of the vehicle are designed and manufactured by external suppliers. This contribution presents new ways to reduce the interaction between engine and body, for what concerns acoustic quality, will be treated taking into account new processes and approaches, new tools for the virtual prototyping and new vehicle architectures.


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    Title :

    New ways to improve vibro-acoustic interactions between powertrain and car body


    Additional title:

    Neue Wege zur Verbesserung der vibroakustischen Wechselwirkung zwischen Kraftübertragung und Karosserieboden


    Contributors:
    Baret, C. (author) / Nierop, G. (author) / Vicari, C. (author)


    Publication date :

    2003


    Size :

    13 Seiten, 8 Bilder, 10 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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