A Control Oriented Model of a Common Rail System

  • Giovanni Fiengo
  • Alessandro di Gaeta
  • Angelo Palladino
  • Veniero Giglio
Part of the SpringerBriefs in Electrical and Computer Engineering book series (BRIEFSELECTRIC)


A mean value model, particularly suited for control applications, of a common rail injection system for GDI engine is presented in this chapter. The mathematical model describes the electrical dynamics of the electrovalve, the actuation circuit, and the steady pressure of the fuel rail. Then, the mathematical model is validated through the comparisons with experimental data collected on a common rail system used to feed a 2.0-liter four cylinder GDI engine. Qualitative analysis of the effects that not manipulable inputs (disturbances) can have on the common rail pressure is furthermore investigated. Indeed, how battery voltage and engine speed variations can affect fuel pressure has been analyzed by means of parameter sensitivity functions (at steady conditions) and plant model simulations (at engine cranking), whereas the pressure ripple originated by the rotation of three lobes pump and functioning of the injectors have been characterized through a wide spectrum analysis of the alternating pressure component at different steady working conditions.


Duty Cycle Engine Speed Pump Speed Common Rail Battery Voltage 
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Copyright information

© The Author(s) 2013

Authors and Affiliations

  • Giovanni Fiengo
    • 1
  • Alessandro di Gaeta
    • 2
  • Angelo Palladino
    • 1
  • Veniero Giglio
    • 3
  1. 1.Dipartimento di IngegneriaUniversità degli studi del SannioBeneventoItaly
  2. 2.Istituto MotoriConsiglio Nazionale delle RicercheNapoliItaly
  3. 3.National Research CouncilIstituto MotoriNapoliItaly

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