Fuel-control servo valve, and fuel injector provided with such servo valve

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Abstract

An internal combustion engine fuel injector (1) has a rod (10) movable along an axis (3) to open/close a nozzle, and a servovalve (7) having a control chamber (23) with a discharge passage (26) which is opened/closed by a shutter (17) movable axially under the control of an electro-actuator (14); the servovalve (7) also has a fixed axial rod (33) having an outer lateral surface (34) through which the discharge passage (26) comes out; the shutter (17) is fitted to the axial rod (33) to slide axially in substantially fluidtight manner, and, when closing the discharge passage (26), is subjected to substantially zero resultant axial pressure by the fuel; and the control chamber (23) is bounded radially by a tubular portion (8) formed in one piece with said axial rod (33).

Classe Tecnologica

B - Performing operations, transporting

Patent Office

United States Patent and Trademark Office

Numero Deposito

US7793862

Anno Deposito

2005

Anno Concessione

2006

Inventori Pugliesi

  • Ricco Mario
  • Ricco Raffaele
  • Satriano Annunziata Anna
  • Stucchi Sergio
  • De Michele Onofrio

Tutti gli inventori

  • Ricco Mario
  • Ricco Raffaele
  • Satriano Annunziata Anna
  • Stucchi Sergio
  • De Michele Onofrio

Titolari pugliesi

  • Non ci sono titolari pugliesi

Tutti i titolari

  • C.R.F. Società Consortile Per Azioni