Robert Boschgmbh

Tony Dumont

Peter Boehland

Olivier Charvet

Francois Rossignol

Sebastian Kanne

Friedrich Howey

Raphael Combe

Sebastien Binsse

Stephan Amelang

Jean-Roch Julien

David Lacroix

François Rossignol

The invention relates to a pressure regulating valve for regulating pressure in a high-pressure fuel accumulator for an internal combustion engine, comprising a valve piston () accommodated axially displaceably in a bore () in a valve housing (), acting on a valve closing member () in the direction of a valve seat (), said valve piston being connected at the end thereof facing away from the valve seat () to an armature () of a magnetic assembly () for actuating the pressure regulating valve, wherein the armature () is accommodated in an armature chamber () and the valve closing member () is accommodated in a valve chamber (). According to the invention, the valve chamber () and the armature chamber () are hydraulically connected via at least one groove () and/or bore () formed in the valve housing (), valve piston () and/or in the armature (), as well as at least one choke point ().

Pressure regulating valve for regulating pressure in a high-pressure fuel accumulator for an internal combustion engine

The invention relates to an injector for injecting fuel into combustion chambers. According to the invention, a valve piston of a control valve is provided with low pressure on both faces thereof. The valve piston is arranged in a valve chamber hydraulically connected to a control chamber and is guided inside a sleeve received in the valve chamber. The valve chamber contains a spring supported on one end against the sleeve and on the other end on the valve piston such that the spring presses the valve piston onto a valve seat and the sleeve onto an opposing bottom surface. The valve piston diameter inside the sleeve corresponds to the effective valve piston diameter at the valve seat.

Injector with axial-pressure compensated control valve

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Caluire, France

Tony Dumont