Pierburg Gmbh

Harald Krause

Michael Thiery

Martin Nowak

Heinrich Dismon

Rolf Lappan

Max Herrmann

Dietmar Miemczyk

Dietmar Rentrop

An air control valve for internal combustion engines having a turbocharger, is placed inside a bypass channel between a pressure side and an intake side of a boost pressure pump of the turbocharger, and has a housing which incorporates an electromagnetic drive unit and a valve unit movable in the housing. The valve unit has a valve rod and a valve closing body attached thereto and a circular sealing element. An arrangement is provided to keep the moving valve unit in a closed position when no current is supplied to the valve unit. At least one pressure compensation opening is provided in the moving valve unit, and the valve closing body has a cylindrical lateral surface which is arranged in such a manner that a housing interior is sealed towards the pressure side or the intake side.

Ambient-air pulsed valve for internal combustion engines equipped with a turbocharger

The invention describes a bypass valve () that can be used as a divert air valve. Bypass valves () that work in the closed or opened position in a force-balanced or pressure-balanced manner are known. During the opening of the bypass valve (), a lower pressure is produced in a gap () between a valve closing body () and a valve seat (), which pressure destroys the force balance and thus loads a movable valve unit () in the closing direction. In order to prevent this, according to the invention pressure equalization openings () are embodied or arranged with respect to the gap () in such a way that a reduced pressure is introduced into the chambers () in the interior of the valve, so that the closing-operative force is distinctly reduced. By these means, the opening times of such a bypass valve can be distinctly reduced.

Bypass valve for internal combustion engines

An electromagnetic reversing valve in which a slidable armature is supported with clearance in a housing and carries a plastic seal unit for selectively closing first and second channels in the housing upon sliding movement of the armature, the sealing unit provides a separate fluid passage establishing communication between a third channel in the housing and one of the first and second channels when it is unsealed. Since the clearance space around the slidable armature is separate and independent from the fluid passage in the seal unit, it can be made substantially narrower in dimension than the fluid passage, thereby to minimize the iron-free gap between the slidable armature and the surrounding member of the magnetic circuit. The iron-free gap is formed in part by the clearance space and in part by a portion of the housing in which the magnetic circuit member is embedded. In a particular embodiment, the seal unit is formed by a central part joined to an outer part by radial, circumferentially spaced ribs defining the fluid passage.

Electromagnetic reversing valve

Growing community of inventors

Grevenbroich, Germany

Harald Krause