Variable Valve Actuation has been researched and applied to improve engine fuel economy and emissions. The effect on compression release engine retarding has not been considered. Heavy duty diesel engines are recognized for their ability to function as effective vehicle retarders. Many approaches have been taken to convert the power producing diesel engine into a power absorber by altering air flow management. Compression release diesel engine retarding is generated by altering engine valve timing when braking is desired. By releasing the compressed air charge at near TDC compression, the energy absorbed is prevented from returning to the engine during expansion. The net energy loss provides the braking effect. This study discusses the parameters used in system design to achieve maximum performance by using variable valve actuation, VVA, to produce the brake event. Retarding power potential is evaluated by cycle analysis for each system and supported by engine test data.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Variable Valve Actuation and Diesel Engine Retarding Performance


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Congress & Exposition ; 1997



    Publication date :

    1997-02-24




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Variable valve actuation and diesel engine retarding performance

    Hu,H. / Israel,M.A. / Vorith,J.M. et al. | Automotive engineering | 1997


    Development and Implementation of a Variable Valve Actuation System to a HD Diesel Engine

    Weiskirch, C. / Eilts, P. / Gehrke, S. | SAE Technical Papers | 2008


    Development and implementation of variable valve actuation system to a heavy-duty diesel engine

    Gehrke,S. / Weiskirch,C. / Eilts,P. et al. | Automotive engineering | 2008


    Variable-valve-actuation-enabled high-efficiency gasoline engine

    Zhang, Y / Zhao, H / Xie, H et al. | SAGE Publications | 2010