FUEL INJECTION SYSTEM WITH HIGH REPEATABILITY AND STABILITY OF OPERATION FOR AN INTERNAL-COMBUSTION ENGINE

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Abstract

The system comprises an injector controlled by commands of a control unit. The injector comprises a dosing servo valve having a control chamber provided with an outlet passage that is opened/closed by an open/close element that is axially movable. The open/close element is carried by an axial guide element that is separate from an anchor of an electromagnet. The open/close element is held in the closing position by a spring acting through an intermediate body. Preferably, the strokes of the open/close element and of the anchor are chosen so as to eliminate, upon closing of the solenoid valve, the rebounds of the open/close element subsequent to the first rebound. The control unit controls an injection comprising a pre-injection and a main injection, via two distinct electrical commands, which are spaced apart by a dwell time such as to occur in an area of reduced variation of the amount of injected fuel; therefore, the stability of operation of the system increases as said dwell time varies.

Classe Tecnologica

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

Patent Office

United States Patent and Trademark Office

Numero Deposito

US2010162992

Anno Deposito

2008

Anno Concessione

2010

Inventori Pugliesi

  • Ricco Mario
  • Ricco Raffaele
  • Stucchi Sergio
  • De Michele Onofrio
  • Altamura Chiara
  • Lepore Domenico

Tutti gli inventori

  • Ricco Mario
  • Ricco Raffaele
  • Stucchi Sergio
  • De Michele Onofrio
  • Altamura Chiara
  • Lepore Domenico

Titolari pugliesi

  • Non ci sono titolari pugliesi

Tutti i titolari

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