Servo valve for controlling an internal combustion engine injection

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Abstract

A control servo valve is housed inside the casing of an internal combustion engine fuel injector, and has an actuator, a control chamber communicating with a fuel inlet and with a fuel outlet passage, and a shutter movable along an axis by the actuator between a closed position and an open position to close and open the outlet passage respectively; the servo valve also has a fixed axial rod interposed between the actuator and the control chamber; the outlet passage comes out through an outer lateral surface of the axial rod; and the shutter is defined by a sleeve which slides axially on the outer lateral surface, and, in the closed position, closes the outlet passage so as to be subjected to a zero axial resultant force by the pressure of the fuel.

Classe Tecnologica

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

Patent Office

United States Patent and Trademark Office

Numero Deposito

US7527036

Anno Deposito

2007

Anno Concessione

2009

Inventori Pugliesi

  • Ricco Mario
  • De Matthaeis Sisto Luigi
  • Gorgoglione Adriano
  • Di Meo Antonio

Tutti gli inventori

  • Ricco Mario
  • De Matthaeis Sisto Luigi
  • Gorgoglione Adriano
  • Di Meo Antonio

Titolari pugliesi

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  • C.R.F. Società Consortile Per Azioni
  • FIAT Ricerche