As the automotive industry undergoes significant changes in the dynamic behavior of vehicles and increasing demand for rapid product design, accurate prediction of product performance in the early stages has become more crucial than ever in the competitive environment. Shim-stack-type hydraulic dampers are widely used in automotive parts for both internal combustion engine (ICE) vehicles and electric vehicles (EV). EVs are even more sensitive to damper performance as ICE, which is a major NVH source has been removed. However, the industry still faces challenges in obtaining accurate models of dampers due to their highly nonlinear hydro-mechanical behavior. Bleed slits in a shim-stack-type hydraulic damper play a key role in determining the blow-off characteristics of dampers, and therefore, accurate prediction of the blow-off characteristics is crucial in evaluating the damping performance of a vehicle. Bleed flow analyses are conducted at two levels: component level and assembly system level. For the component level analysis, computational fluid dynamics (CFD) is utilized to analyze bleed flow characteristics corresponding to various bleed slits, which are validated by conducting experimental flow bench tests. For the assembly system level analysis, a dynamic 1-dimensional (1-D) system model is developed for a target passive hydraulic damper to evaluate the effect of bleed slits on the assembly level. The damper characteristic of the proposed method and a conventional method with a constant discharge coefficient are compared. An experimentally measured damper characteristic from a dynamo is used to validate the system model.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A Computational and Experimental Investigation on the Effect of Bleed Slits for a Shim Stack Type Hydraulic Damper


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Truitt, Jordan (Autor:in) / Oh, Joseph (Autor:in) / Sankaran, Shivanand (Autor:in)

    Kongress:

    Noise and Vibration Conference & Exhibition ; 2023



    Erscheinungsdatum :

    2023-05-08




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Computational Investigation of a Bleed Air Ice Protection System

    Wong, See-Ho / Papadakis, Michael / Zamora, Alonso | AIAA | 2009


    Performance Characterization and Modeling of Shim Stack Assemblies in Vehicle Shock Absorbers

    Farjoud, Alireza / Ahmadian, Mehdi | SAE Technical Papers | 2010


    Shim Stock, Laminated

    SAE Technical Papers | 2012


    Metal shim brazing

    Schwartzbart, H. | Engineering Index Backfile | 1962


    SHIM MANUFACTURING SYSTEM

    Europäisches Patentamt | 2021

    Freier Zugriff