Polyurethane foam continues today as the premier cushioning material utilized in automotive seating applications. In seating design, most foam properties specified by the design engineer in establishing foam properties currently are based upon static test methods. The in-service mode of an automotive seat, however, is dynamic rather than static. Therefore, the overlooked real time dynamic properties are of greater importance for the comfort performance of a seat than such static properties as Indentation Force Deflection (IFD) or density. Unfortunately, there are no widely accepted test methods for dynamically characterizing automotive seating foam. Correlation of real time dynamic properties to comfort could minimize the need for expensive, time consuming and subjective road testing. The purpose of this paper is to propose some potential dynamic characterization techniques for automotive seating foam.Different polyurethane technologies, all adaptable to the manufacture of automotive seating are shown to exhibit quite different real time dynamic properties not predictable from static tests. In this paper, changes in dynamic modulus as a function of flex history are monitored in real time and related to the specific polyurethane technology employed. Likewise, dynamic hysteresis and changes therein are studied in real time. Vibrational transmissivity characteristics are explored by means of a constant g frequency sweep method. The adaptability of polyurethane foam to provide varied dynamic properties gives the automotive seat designer the ability to specify the ideal cushioning material to yield the maximum comfort to a specific design.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Real Time Dynamic Comfort and Performance Factors of Polyurethane Foam in Automotive Seating


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1996



    Publication date :

    1996-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Real time dynamic comfort and performance factors of polyurethane foam in automotive seating

    Cavender,K.D. / Kinkelaar,M.R. / ARCO Chemical,US | Automotive engineering | 1996


    Automotive seating comfort; defining comfort properties in polyurethane foam

    Blair,G.R. / Milivojevich,A. / Pageau,J.G. et al. | Automotive engineering | 1999


    Automotive Seating Comfort; Defining Comfort Properties in Polyurethane Foam

    Blair, G. R. / Milivojevich, A. / Pageau, J.-G. et al. | British Library Conference Proceedings | 1999


    Automotive Seating Comfort; Defining ComfortProperties in Polyurethane Foam

    Milivojevich, A. / Blair, G. R. / Pageau, J. -G. et al. | SAE Technical Papers | 1999


    Automotive Seating Foam: Subjective Dynamic Comfort Study

    Khameneh, Khalil N. / Yu, Lorraine C. | SAE Technical Papers | 1999