The goal of the present article is to analyse the performances of a modern vehicle equipped with a novel suspension system linking front, rear, right and left cylinders via a semi-active hydraulic circuit, developed by the Tenneco Automotive company. In addition to improving the vehicle's vertical performances (in terms of comfort), both the stiff roll motion of the carbody and the soft wrap motion of the rear/front wheel-axle units can be obtained and tuned via eight electrovalves. The proposed system avoids the use of classical anti-roll bars, which would be incompatible with the wrap performance. A major problem of the project is to produce a realistic and efficient 3D multibody dynamic model of an Audi A6 coupled, at the equational level, with an hydraulic model of the suspension including cylinders, accumulators, valve characteristics, oil compressibility and pipe dynamics. As regards the hydraulic submodel, a particular attention is paid to assemble resistive components properly without resorting to the use of artificial volumes, as proposed by some software dealing with the dynamics of hydraulic systems. According to Tenneco Automotive requirements, this model must be produced in a Matlab/Simulink form, in particular for control purposes. Thanks to the symbolic approach underlying our multibody program; a unified hybrid model can be obtained as a unique plant dynamic block to be real-time integrated in the Simulink environment on a standard computer. Simulation results highlight the advantages of this new suspension system, in particular regarding the behaviour of the car which can remain stiff in roll for curve negotiation, while maintaining a soft wrap behaviour on uneven surfaces.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Multiphysics modelling of multibody systems: application to car semi-active suspensions


    Contributors:
    Docquier, N. (author) / Poncelet, A. (author) / Delannoy, M. (author) / Fisette, P. (author)

    Published in:

    Vehicle System Dynamics ; 48 , 12 ; 1439-1460


    Publication date :

    2010-12-01


    Size :

    22 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown





    Multiphysics modelling of multibody systems: Application to car semi-active suspensions

    Docquier, N. / Poncelet, A. / Delannoy, M. et al. | Tema Archive | 2010


    Multiphysics modelling of multibody systems: application to car semi-active suspensions

    Docquier,N. / Poncelet,A. / Delannoy,M. et al. | Automotive engineering | 2010


    Semi-Active Suspensions

    Rajamani, Rajesh | Springer Verlag | 2006


    Multibody Modelling

    Genta, Giancarlo / Morello, Lorenzo | Springer Verlag | 2019