Kraftstoff-Elektro-Einspritzelement für ein Kraftstoffeinspritzsystem für eine Brennkraftmaschine

Details

Veröffentlichungs-Nr.

EP2863048

Aktenzeichen

EP13189601

Anmeldetag

21. Oktober 2013

Veröffentlichung

6. Dezember 2017

Erteilung

6. Dezember 2017

Rechtsraum

EP

IPC

F02M61/08

Abstract

A fuel electro-injector for a fuel injection system for an internal combustion engine, having an atomizer equipped with a nozzle (11) and a valve needle (12) defining a discharge section (14) that is annular and has a width that continuously increases as the opening stroke of the valve needle (12) proceeds; this opening stroke is directed outwards and is caused, in a proportional manner, by the operation of an electric actuator (32); the electro-injector (4) has a high-pressure environment (16,18) with an annular passageway (16) around the lateral outer surface of the valve needle (12) to supply fuel to the discharge section (14), and a low-pressure environment (22), which communicates with a fuel outlet and is separated from the high-pressure environment (16,18) by a dynamic seal (25) between the valve needle (12) and the nozzle (11); the electro-injector is provided with a hydraulic connection (36) between the electric actuator (32) and the valve needle (12), with a pressure chamber (37) axially delimited, on one side, by the valve needle (12) and, in use, is filled with fuel that, once compressed, axially pushes the valve needle (12) along the opening stroke; the hydraulic connection (36) is placed in the low-pressure environment (22), so that the pressure chamber (37) only communicates with this environment.

Anmelder

Firma

C.R.F. SOCIETÀ CONSORTILE PER AZIONI

Land

🇮🇹 Italien

Fachgebiete