Robert Boschgmbh

Philippe Allio

Peter Boehland

Thomas Kuegler

Friedrich Moser

Christoph Buehler

Gerhard Mack

Joachim Winter

Maike Sander-Potz

Wendelin Potz

The fuel injection system has one high-pressure fuel pump and one fuel injection valve for each cylinder of the engine. The fuel injection valve has a first hollow injection valve member and a second valve member guided displaceably, inside the first valve member for controlling first and second opening(s), respectively into the associated engine cylinder. The second valve member is movable by the pressure prevailing in a pressure chamber in an opening direction counter to a closing force and is acted upon at least indirectly by the pressure prevailing in a fuel-filled control chamber, which pressure is controllable as a function of operating parameters of the engine such that the second injection valve member, by means of the pressure prevailing in the control chamber, can be blocked, independently of an opening motion of the first injection valve member in a position that closes the at least one second injection opening.

Fuel injection device for an internal combustion engine

The fuel injection system has one high-pressure fuel pump () with a pump work chamber () and one fuel injection valve (), communicating with the pump work chamber, for each cylinder of the engine. The fuel injection valve () has a first injection valve member (), by which at least a first injection opening () is controlled, and which is movable in an opening direction () counter to a closing force by the pressure generated in the pump work chamber (). Inside the hollow first injection valve member (), a second injection valve member () is guided displaceably, by which at least a second injection opening () is controlled, and which is movable by the pressure prevailing in the pressure chamber () in an opening direction () counter to a closing force; the second injection valve member () is acted upon at least indirectly by the pressure prevailing in a fuel-filled control chamber (), which pressure is generated, as a function of operating parameters of the engine, by a feed pump () such that the second injection valve member () either remains in its closed position, or can open.

Growing community of inventors

Montluel, France

Philippe Allio