FUEL INJECTOR EQUIPPED WITH A METERING SERVOVALVE FOR AN INTERNAL COMBUSTION ENGINE

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Abstract

A fuel injector (1) has an injector body (2) and a control rod (10), which is movable in the injector body (2) along an axis (3) to control the opening/closing of a nozzle that injects fuel into a cylinder of the engine; the injector body (2) houses a metering servovalve (5) having a control chamber (26), which is axially delimited by the control rod (10) and communicates with an inlet (4) and with a discharge channel (42); the metering servovalve (5) is provided with a shutter (47), which slides axially on an axial guide (38), from which the discharge channel (42) exits, to open and close the discharge channel (42) and, in consequence, vary the pressure in the control chamber (26); the discharge channel (42) has at least two restrictions (53,44) having calibrated passage sections and arranged in series with each other to divide the pressure drop along the discharge channel (42).

Classe Tecnologica

F - Mechanical engineering, lighting, heating, weapons, blasting

Patent Office

United States Patent and Trademark Office

Numero Deposito

US2009321542

Anno Deposito

2008

Anno Concessione

2009

Inventori Pugliesi

  • Ricco Mario
  • Ricco Raffaele
  • Stucchi Sergio
  • De Michele Onofrio

Tutti gli inventori

  • Ricco Mario
  • Ricco Raffaele
  • Stucchi Sergio
  • De Michele Onofrio

Titolari pugliesi

  • Non ci sono titolari pugliesi

Tutti i titolari

  • FIAT RICERCHE
  • C.R.F. SOCIETA CONSORTILE PER AZIONI