Robert Boschgmbh

Johannes Schnedt

Martin Bernhaupt

Christian Graspeuntner

Jaroslav Hlousek

Gerhard Rehbichler

Joachim Lackner

A device for injecting fuel into the combustion chamber of an internal combustion engine comprising at least one injector. The injector includes an injector body, a high-pressure accumulator integrated into the injector body, an injection nozzle, a high-pressure bore, and a feed bore. The injection nozzle defines a nozzle chamber and has a nozzle needle configured to be guided in an axially movable manner and that is surrounded by the nozzle chamber. The high-pressure bore is connected to the high-pressure accumulator and the nozzle chamber. The feed bore is configured to feed high-pressure fuel to the high-pressure accumulator. Additionally, the feed bore has a lance connection positioned laterally on the injector body, is formed as a bore separate from the high-pressure bore, and connects the lance connection directly to the high-pressure accumulator.

Device for injecting fuel into the combustion chamber of an internal combustion engine

In a fuel supply system for heavy oil common-rail injection systems for internal combustion engines, including a tank (), a primary feed pump () for delivering heavy oil from the tank () to a high-pressure pump (), wherein the high-pressure pump (), via at least one high-pressure line (), is connected to a high-pressure accumulator (rail) () feeding at least one injector (), and, furthermore, a purge valve (), which is connected to the high-pressure accumulator via a separate high-pressure line () for directing at least a portion of the heavy oil back into the tank () via a return line, the purge valve () includes a valve member () which is movable between an opened and a closed position, a high-pressure connection for a high-pressure line () communicating with a heavy oil high-pressure accumulator (rail) (), a low-pressure connection for a return line, and actuating means for actuating the valve member (), wherein the valve seat () of the valve member () is designed as a sliding seat.

Fuel supply system for heavy oil common-rail injection systems

In a method and device for preheating an internal combustion engine injector () including at least one valve () to be activated by an electromagnet (), in which the coil of the electromagnet () is energized before the engine is started, the coil of the electromagnet () is periodically powered with a preheating voltage (), and the current characteristic () within the coil is monitored and subjected to an evaluation to detect local current minima () and/or maxima () caused by armature reactions.

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Salzburg, Austria

Johannes Schnedt