Patent ID: 6494383
Filing Date: 2002-12-17
Classification: F02M

Abstract:
A control valve configuration for use in a fuel injector for an internal combustion engine, the control valve configuration comprising:a housing having a valve chamber formed therein, a valve inlet formed therein for a fluid which is under pressure, and a valve outlet formed therein for hydraulically controlling an injection process at a nozzle of the fuel injector, said valve chamber having a first section, a second section, and a return opening, said housing further having a chamber wall defining a rear of said valve chamber and a seat defining a first part of a seat valve disposed in said first section; an actuating device disposed in said housing; and a valve body disposed in said valve chamber, said valve body can be displaced axially by said actuating device and, depending on a position of said valve body, said valve body produces or blocks a fluidic connection between said valve inlet and said valve outlet, said valve body having a first valve section forming a second part of said seat valve disposed between said valve inlet and said valve outlet in said first section of said valve chamber, said seat valve being closed in a rest position of said valve body and being opened in a working position of said valve body, said valve body having a second valve section rigidly connected to said first valve section, said second section of said valve chamber and said second valve section forming a slide valve which, in the rest position of said valve body produces a fluidic connection between said valve outlet and said return opening and blocks a fluidic connection between said seat valve and said valve outlet, said slide valve closes said return opening and then starts to produce a fluidic connection between said seat valve and said valve outlet only after said valve body leaves the rest position, said first section of said valve chamber passing via said seat of said seat valve in a direction of flow into said second section of said valve chamber.