Fuel injector with balanced metering servovalve for an internal-combustion engine

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Abstract

The injector comprises a balanced metering servovalve for controlling a rod for opening/closing a nebulizer. The servovalve has a valve body having a control chamber provided with an outlet passage that is opened/closed by an axially mobile open/close element. The open/close element is made of a single piece with a bushing separate from an armature plate of an electromagnet. The bushing is coupled to a stem in an axially slidable way for closing an exhaust duct in communication with the outlet passage The open/close element is kept in a closed position by a spring that acts upon the bushing through an intermediate body connected thereto. The armature plate can be displaced with respect to the bushing between a flange of the intermediate body and a shoulder of the bushing, for eliminating the rebounds of the open/close element upon closing of the servovalve.

Classe Tecnologica

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

Patent Office

United States Patent and Trademark Office

Numero Deposito

US8037869

Anno Deposito

2009

Anno Concessione

2011

Inventori Pugliesi

  • Ricco Mario
  • Ricco Raffaele
  • Stucchi Sergio
  • De Michele Onofrio
  • Gargano Marcello
  • Lepore Domenico
  • Mazzarella Carlo

Tutti gli inventori

  • Ricco Mario
  • Ricco Raffaele
  • Stucchi Sergio
  • De Michele Onofrio
  • Gargano Marcello
  • Lepore Domenico
  • Mazzarella Carlo

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