Patents by Inventor Stefan Schuerg
Stefan Schuerg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10041459Abstract: A pressure control valve for a fuel injection system, in particular a common-rail injection system, for controlling pressure in a high-pressure fuel reservoir, includes a magnetic actuator configured to actuate a spherical valve closing element. The magnetic actuator interacts with a reciprocatingly displaceable armature that is connected to an armature pin in order to transmit a force of the magnetic actuator to the spherical valve closing element. At least one of the spherical valve closing element and the armature pin is axially displaceably guided in a valve piece which forms a valve seat configured to interact with the spherical valve closing element.Type: GrantFiled: November 7, 2013Date of Patent: August 7, 2018Assignee: Robert Bosch GmbHInventors: Stefan Schuerg, Vittorio Caroli
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Publication number: 20160123289Abstract: A pressure control valve for a fuel injection system, in particular a common-rail injection system, for controlling pressure in a high-pressure fuel reservoir, includes a magnetic actuator configured to actuate a spherical valve closing element. The magnetic actuator interacts with a reciprocatingly displaceable armature that is connected to an armature pin in order to transmit a force of the magnetic actuator to the spherical valve closing element. At least one of the spherical valve closing element and the armature pin is axially displaceably guided in a valve piece which forms a valve seat configured to interact with the spherical valve closing element.Type: ApplicationFiled: November 7, 2013Publication date: May 5, 2016Inventors: Stefan Schuerg, Vittorio Caroli
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Patent number: 8578896Abstract: A method for bounce suppression of a valve member operated by a piezo actuator during the closing phase of a valve in an internal combustion engine, having the following steps: partial discharging of the piezo actuator, whereby the valve member is braked even before reaching the valve seat, interruption of the discharge of the piezo actuator, whereby the piezo actuator is upset by the valve member and builds up an electric charge, renewed discharging of the piezo actuator, the residual charge after partial discharge and the charge built up during the charge interruption being at least partially dissipated. It is provided, according to the present invention, briefly to interrupt the discharge process, whereby the piezo actuator absorbs the energy of the valve member and, even before an elastic rebound takes place, the piezo actuator is discharged again, in order to dissipate the energy absorbed by the piezo actuator.Type: GrantFiled: January 26, 2009Date of Patent: November 12, 2013Assignee: Robert Bosch GmbHInventors: Violaine Chassagnoux, Stefan Schuerg, Wolfgang Stoecklein
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Patent number: 7990023Abstract: An arrangement is proposed for forming a piezoelectric actuator, which has at least one piezoelectric element that in each case consists of a multi-layer structure of piezoelectric-layers, wherein internal electrodes arranged between the piezoelectric-layers in the direction of the build-up of the layers of the piezoelectric element, have an electrical voltage of different polarity alternately applied to them. Around the piezoelectric element, or in the case of multiple piezoelectric elements positioned in series in the activation direction, around the piezoelectric elements, and at least partially around the actuator head and the actuator foot there is arranged a covering system made from at least one layer of an insulating material. The at least one layer encloses the joints between the piezoelectric element or elements and the actuator head and the actuator foot, forming a seal.Type: GrantFiled: May 22, 2007Date of Patent: August 2, 2011Assignee: Robert Bosch GmbHInventors: Albano De Paoli, Stefan Schuerg, Wolfgang Stoecklein, Holger Rapp, Thomas Pauer, Friedrich Boecking, Marco Holst, Helmut Sommariva, Claudia Klotz, Peter Cromme
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Publication number: 20110042594Abstract: A method for bounce suppression of a valve member operated by a piezo actuator during the closing phase of a valve in an internal combustion engine, having the following steps: partial discharging of the piezo actuator, whereby the valve member is braked even before reaching the valve seat, interruption of the discharge of the piezo actuator, whereby the piezo actuator is upset by the valve member and builds up an electric charge, renewed discharging of the piezo actuator, the residual charge after partial discharge and the charge built up during the charge interruption being at least partially dissipated. It is provided, according to the present invention, briefly to interrupt the discharge process, whereby the piezo actuator absorbs the energy of the valve member and, even before an elastic rebound takes place, the piezo actuator is discharged again, in order to dissipate the energy absorbed by the piezo actuator.Type: ApplicationFiled: January 26, 2009Publication date: February 24, 2011Inventors: Violaine Chassagnoux, Stefan Schuerg, Wolfgang Stoecklein
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Publication number: 20090199379Abstract: An arrangement is proposed for forming a piezoelectric actuator, which has at least one piezoelectric element that in each case consists of a multi-layer structure of piezoelectric-layers, wherein internal electrodes arranged between the piezoelectric-layers in the direction of the build-up of the layers of the piezoelectric element, have an electrical voltage of different polarity alternately applied to them. Around the piezoelectric element, or in the case of multiple piezoelectric elements positioned in series in the activation direction, around the piezoelectric elements, and at least partially around the actuator head and the actuator foot there is arranged a covering system made from at least one layer of an insulating material. The at least one layer encloses the joints between the piezoelectric element or elements and the actuator head and the actuator foot, forming a seal.Type: ApplicationFiled: May 22, 2007Publication date: August 13, 2009Inventors: Albano De Paoli, Stefan Schuerg, Wolfgang Stoecklein, Holger Rapp, Thomas Pauer, Friedrich Boecking, Marco Holst, Helmut Sommariva, Claudia Liebscher, Peter Cromme
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Patent number: 7258283Abstract: A fuel injector with a direct needle control for an internal combustion engine, having an actuator, a hydraulic booster, and a nozzle needle guided in a nozzle body and acting on a nozzle needle sealing seat. The hydraulic booster includes a booster piston connected to the actuator and a nozzle needle booster piston connected to the nozzle needle; a booster chamber in the form of an actuator coupler chamber is associated with a pressure surface of the actuator booster piston; and depending on the pressure in the actuator coupler chamber, the nozzle needle is lifted away from the nozzle needle sealing seat, thus initiating an injection. In addition to the actuator booster piston, a control element is provided that is able to execute a stroke motion, is hydraulically coupled to the actuator coupler chamber by means of a first control surface, and is associated with a control chamber by means of a second control surface.Type: GrantFiled: February 21, 2006Date of Patent: August 21, 2007Assignee: Robert Bosch GmbHInventors: Rudolf Heinz, Stefan Schuerg, Wolfgang Stoecklein, Michael Mennicken, Holger Rapp, Thomas Kuegler, Hans-Christoph Magel, Andreas Wengert, Thomas Pauer, Andreas Rau, Andreas Bartsch, Christian Kuhnert
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Publication number: 20070119991Abstract: The invention relates to a valve for a fuel injection system, having a valve seat embodied in a valve housing, and having a valve member which is movable in the valve housing and has a sealing face that when the valve is closed rests sealingly against the valve seat and when the valve is open, together with the valve seat, defines a valve gap through which fuel flows. To prevent cavitation damage, the valve member has an encompassing hollow throat, which is disposed in the flow direction immediately downstream of the sealing face and is adjoined by an encompassing cross-sectional thickening of the valve member.Type: ApplicationFiled: September 6, 2004Publication date: May 31, 2007Inventors: Stefan Schuerg, Wolfgang Stoecklein, Holger Rapp, Violaine Chassagnoux
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Publication number: 20060186221Abstract: A fuel injector with a direct needle control for an internal combustion engine, having an actuator, a hydraulic booster, and a nozzle needle guided in a nozzle body and acting on a nozzle needle sealing seat. The hydraulic booster includes a booster piston connected to the actuator and a nozzle needle booster piston connected to the nozzle needle; a booster chamber in the form of an actuator coupler chamber is associated with a pressure surface of the actuator booster piston; and depending on the pressure in the actuator coupler chamber, the nozzle needle is lifted away from the nozzle needle sealing seat, thus initiating an injection. In addition to the actuator booster piston, a control element is provided that is able to execute a stroke motion, is hydraulically coupled to the actuator coupler chamber by means of a first control surface, and is associated with a control chamber by means of a second control surface.Type: ApplicationFiled: February 21, 2006Publication date: August 24, 2006Inventors: Rudolf Heinz, Stefan Schuerg, Wolfgang Stoecklein, Michael Mennicken, Holger Rapp, Thomas Kuegler, Hans-Christoph Magel, Andreas Wengert, Thomas Pauer, Andreas Rau, Andreas Bartsch, Christian Kuhnert
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Patent number: 6832749Abstract: The present invention relates to a valve for controlling fluids, which has a piezoelectric actuator that is disposed in an actuator bore. A hydraulic booster and a bellows are also provided. The bellows is embodied such that it can absorb the axial stroke of the piezoelectric actuator. The bellows is connected solidly to the piezoelectric actuator and is also connected solidly to the actuator bore assure a fluid-tight seal of the actuator module relative to the other regions of the valve.Type: GrantFiled: April 17, 2002Date of Patent: December 21, 2004Assignee: Robert Bosch GmbHInventors: Stefan Schuerg, Udo Schaich
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Publication number: 20030075614Abstract: A valve assembly suitable in particular for a fuel injection system of an internal combustion engine is proposed, which includes an adjustably disposed valve element, an actuator unit, in particular a piezoelectric actuator unit, for adjusting the valve element, and a hydraulic force transmission chamber disposed in the force transmission path between the actuator unit and the valve element. For diverting at least one hydraulic filling stream, to be delivered to the force transmission chamber for filling it, from a hydraulic mainstream, a hydraulic pressure distributor assembly (50b, 52b) is provided, which has a conduit system (46b, 48b) that is embodied in a conduit housing (14b) and has both a main conduit (46b), carrying the hydraulic mainstream, and at least one filling conduit (48b), branching off from the main conduit (46b) and carrying the hydraulic filling stream.Type: ApplicationFiled: August 27, 2002Publication date: April 24, 2003Inventors: Stefan Schuerg, Otto SImon, Udo Lux, Wolfgang Stoecklein, Roland Stoecklein, Guenther Weissenberger, Georg Fleischmann, Thomas Koeppel
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Publication number: 20020134954Abstract: The present invention relates to a valve for controlling fluids, having a piezoelectric actuator and a hydraulic booster (2), which has a first piston (3), a second piston (4), and a pressure chamber (6) disposed between the two pistons. A valve member (6) is connected to the second piston (4) and can be brought into contact with at least a first valve seat (7). To adjust a stroke of the valve member (6), a separate adjusting element (10) is present as an individual component.Type: ApplicationFiled: April 17, 2002Publication date: September 26, 2002Inventors: Dieter Kienzler, Stefan Schuerg
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Publication number: 20020134953Abstract: The present invention relates to a valve for controlling fluids, which has a piezoelectric actuator (2) that is disposed in an actuator bore (3). A hydraulic booster (11) and a bellows (5) are also provided. The bellows (5) is embodied such that it can absorb the axial stroke of the piezoelectric actuator (2). The bellows (5) is connected solidly to the piezoelectric actuator (2) and is also connected solidly to the actuator bore (3). This assures a fluid-tight seal of the actuator module relative to the other regions of the valve.Type: ApplicationFiled: April 17, 2002Publication date: September 26, 2002Inventors: Stefan Schuerg, Udo Schaich