Project of Mechanical VVA Systems for Motorcycle Engines

  • Carmelina Abagnale
  • Mariano Migliaccio
  • Ottavio Pennacchia
Conference paper


This paper presents some results of the project of innovative mechanical variable valve actuation (hereafter VVA) systems, developed for high performance motorcycle engines, at University of Napoli Federico II, Department of Industrial Engineering–Section Mechanics and Energy (hereafter DiME). In addition to a first simple (and limited) system used just as a model for the previous analysis, the work has evolved through three basic steps leading to three types of VVA systems, all mechanical systems (as defined in literature and described later). The study has been conducted implementing a numerical procedure specifically designed to determine cam profile and kinematic and dynamic characteristics of the whole system, starting from some data (as described in the paper). The model has been validated against the conventional timing system using kinematic simulations. Results of the numerical procedure verify the validity of the VVA systems and particularly a better performance of the last one, in spite of its higher complexity.


Engine valves Internal combustion engine timing Valve timing Valve timing variation Variable valve actuation VVA systems 


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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Carmelina Abagnale
    • 1
  • Mariano Migliaccio
    • 1
  • Ottavio Pennacchia
    • 1
  1. 1.Department of Industrial EngineeringUniversity of Napoli Federico IINapoliItaly

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