We start our study with a survey of existing variable valve actuation (VVA) devices. We then describe our work, taken place over a time period from 2001 to 2007, on several VVA concepts. All of our projects described include pre-design modeling and simulation. Also, for each one of the proposed designs, a bench-top motorized test fixture was built and ran for proof of concept. Our projects represent a mixture of exploratory research and production-related development work. They can be classified in four broad categories: discrete-step systems; mechanical continuously-variable systems; active stationary-hydraulic lash adjusters; cam-driven hydraulic-lost-motion mechanism. These devices differ in their complexity and versatility but offer a spectrum of design solutions applicable to a range of products. Specific attributes of these different approaches are analyzed and discussed, and some test results are presented.


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    Title :

    Simulation and Test Results for Several Variable-Valve-Actuation Mechanisms


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE World Congress & Exhibition ; 2009



    Publication date :

    2009-04-20




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Simulation and test results for several variable-valve-actuation mechanisms

    Gecim,B. / Raghavan,M. / General Motors,US | Automotive engineering | 2009


    Type synthesis of mechanisms for variable valve actuation

    wampler,C.W. / General Motors Research,US | Automotive engineering | 1993


    Variable valve actuation.

    Demmelbauer-Ebner,W. / Dachs,A. / Lenz,H.P. et al. | Automotive engineering | 1991


    Type Synthesis of Mechanisms for Variable Valve Actuation

    Wampler, Charles W. | SAE Technical Papers | 1993