Patents by Inventor Stefanie Hutzelmann
Stefanie Hutzelmann 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: 11168622Abstract: A switch over valve, in particular for controlling a hydraulic fluid flow, comprising: a contact element; and a sleeve shaped connecting section including a first bore hole for connecting with a first hydraulic fluid conduit, a second bore hole for connecting with a second hydraulic fluid conduit, and a relief bore hole for connecting with a relief channel, wherein the contact element is arranged in the sleeve shaped connecting section and optionally displaceable into a first switching position or a second switching position, wherein the first hydraulic fluid conduit is connected with the relief channel in the first switching position and the second hydraulic fluid conduit is connected with the relief channel in the second switching position, characterized in that the cut off valves are provided which are integrated into the switch over valve.Type: GrantFiled: November 24, 2015Date of Patent: November 9, 2021Assignee: Hilite Germany GmbHInventors: Stefanie Hutzelmann, Alexander Mudra, Dietmar Schulze
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Patent number: 10690177Abstract: A connecting rod for a variable compression internal combustion engine, the connecting rod including a crank bearing eye for connecting the connecting rod with a crankshaft of the internal combustion engine; a connecting rod bearing eye for connecting the connecting rod with a cylinder piston of the internal combustion engine; an eccentrical element adjustment arrangement for adjusting an effective connecting rod length, wherein the eccentrical element adjustment arrangement includes an eccentrical element that cooperates with an eccentrical element lever and that is connected torque proof with the eccentrical element lever, wherein a wrist pin of the cylinder piston is receivable in the eccentrical element, wherein the eccentrical element adjustment arrangement includes two cylinders with a respective piston that is supported in a cylinder bore and connected with a respective support rod, wherein the eccentrical element lever includes one or plural eccentrical element lever segments.Type: GrantFiled: January 22, 2018Date of Patent: June 23, 2020Assignee: ECO Holding 1 GmbHInventors: David Huber, Stefanie Hutzelmann, Dietmar Schulze
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Patent number: 10287973Abstract: A hydraulic valve for shifting a control piston in a connecting rod of an internal combustion engine with variable compression, the hydraulic valve including a valve housing including a first operating connection and a second operating connection and a supply connection that is loadable with a hydraulic pressure of a hydraulic fluid; a step piston that is arranged in the valve housing and displaceable against a force of a preloaded spring. A first check valve is associated with the first operating connection and a second check valve is associated with the second operating connection wherein the first check valve and the second check valve open or close a connection of the first operating connection or the second operating connection with the supply connection as a function of a position of the step piston, wherein the first check valve and the second check valve is integrated into the valve housing.Type: GrantFiled: November 17, 2016Date of Patent: May 14, 2019Assignee: ECO Holding 1 GmbHInventors: Stefanie Hutzelmann, Alexander Mudra, Dietmar Schulze
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Publication number: 20180238382Abstract: A connecting rod for a variable compression internal combustion engine, the connecting rod including a crank bearing eye for connecting the connecting rod with a crankshaft of the internal combustion engine; a connecting rod bearing eye for connecting the connecting rod with a cylinder piston of the internal combustion engine; an eccentrical element adjustment arrangement for adjusting an effective connecting rod length, wherein the eccentrical element adjustment arrangement includes an eccentrical element that cooperates with an eccentrical element lever and that is connected torque proof with the eccentrical element lever, wherein a wrist pin of the cylinder piston is receivable in the eccentrical element, wherein the eccentrical element adjustment arrangement includes two cylinders with a respective piston that is supported in a cylinder bore and connected with a respective support rod, wherein the eccentrical element lever includes one or plural eccentrical element lever segments.Type: ApplicationFiled: January 22, 2018Publication date: August 23, 2018Inventors: David Huber, Stefanie Hutzelmann, Dietmar Schulze
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Patent number: 9964031Abstract: A hydraulic valve, in particular for shifting an actuation piston in a piston rod for an internal combustion engine with variable compression, the piston rod including a valve housing which includes a first operating connection and a second operating connection and a supply connection which is loadable with a hydraulic pressure of a hydraulic fluid, wherein a piston that is movably arranged in the valve housing is movable in a linear manner against a force of a preloaded spring, wherein the operating connections and the supply connection are sealable relative to each other and against an ambient atmosphere by seal elements upon correct installation in a valve receiving bore hole of the connecting rod, and wherein the seal elements are applicable against a wall of the valve receiving bore hole in a sealing manner due to the hydraulic pressure.Type: GrantFiled: February 28, 2016Date of Patent: May 8, 2018Assignee: Hillte Germany GmbHInventors: Manfred Balling, Stefanie Hutzelmann, Dietmar Schulze, Tobias Matschiner
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Publication number: 20170122198Abstract: A hydraulic valve for shifting a control piston in a connecting rod of an internal combustion engine with variable compression, the hydraulic valve including a valve housing including a first operating connection and a second operating connection and a supply connection that is loadable with a hydraulic pressure of a hydraulic fluid; a step piston that is arranged in the valve housing and displaceable against a force of a preloaded spring. A first check valve is associated with the first operating connection and a second check valve is associated with the second operating connection wherein the first check valve and the second check valve open or close a connection of the first operating connection or the second operating connection with the supply connection as a function of a position of the step piston, wherein the first check valve and the second check valve is integrated into the valve housing.Type: ApplicationFiled: November 17, 2016Publication date: May 4, 2017Inventors: Stefanie Hutzelmann, Alexander Mudra, Dietmar Schulze
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Publication number: 20170022895Abstract: A hydraulic valve, in particular for shifting an actuation piston in a piston rod for an internal combustion engine with variable compression, the piston rod including a valve housing which includes a first operating connection and a second operating connection and a supply connection which is loadable with a hydraulic pressure of a hydraulic fluid, wherein a piston that is movably arranged in the valve housing is movable in a linear manner against a force of a preloaded spring, wherein the operating connections and the supply connection are sealable relative to each other and against an ambient atmosphere by seal elements upon correct installation in a valve receiving bore hole of the connecting rod, and wherein the seal elements are applicable against a wall of the valve receiving bore hole in a sealing manner due to the hydraulic pressure.Type: ApplicationFiled: February 28, 2016Publication date: January 26, 2017Inventors: Manfred Balling, Stefanie Hutzelmann, Dietmar Schulze, Tobias Matschiner
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Publication number: 20160312713Abstract: A switch over valve, in particular for controlling a hydraulic fluid flow, comprising: a contact element; and a sleeve shaped connecting section including a first bore hole for connecting with a first hydraulic fluid conduit, a second bore hole for connecting with a second hydraulic fluid conduit, and a relief bore hole for connecting with a relief channel, wherein the contact element is arranged in the sleeve shaped connecting section and optionally displaceable into a first switching position or a second switching portion, wherein the first hydraulic fluid conduit is connected with the relief channel in the first switching position and the second hydraulic fluid conduit is connected with the relief channel in the second switching position, characterized in that the cut off valves are provided which are integrated into the switch over valve.Type: ApplicationFiled: November 24, 2015Publication date: October 27, 2016Inventors: Stefanie Hutzelmann, Alexander Mudra, Dietmar Schulze
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Patent number: 9322419Abstract: A central valve for a pivot motor actuator, the central valve including a housing tube including a first operating connection, a supply connection, a second operating connection and a tank drain connection; a piston enveloped by the housing tube and moveable relative to the housing tube, wherein the first operating connection is connected with the supply connection and the second operating connection is connected with the tank drain connection in a first position of the piston, wherein the piston is positioned in a center position in a second position, and wherein the second operating connection is connected with the supply connection and the first operating connection is connected with the tank drain connection in a third position of the piston, wherein the piston includes at least one first check valve on its outside.Type: GrantFiled: March 25, 2014Date of Patent: April 26, 2016Assignee: Hilite Germany GmbHInventors: Stefanie Hutzelmann, Jan Kroepelin, Dietmar Schulze, Juergen Goll
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Patent number: 9322331Abstract: A connecting rod for a two stage variable compression in an internal combustion engine, the connecting rod including a combustion piston pin support eye that is arranged offset relative to an axis in an eccentrical component which is pivotable about the axis in a first direction of rotation through a first hydraulic displacement cavity and pivotable in a second direction of rotation through a second hydraulic displacement cavity, wherein a hydraulic valve is arranged in the connecting rod, wherein the hydraulic valve includes a hydraulic supply connection at which a hydraulic pressure is applied, wherein the hydraulic pressure moves a hydraulic piston against a force of a preload of a spring, wherein the hydraulic piston remains in a stable low pressure position in a low range of the hydraulic pressure due to the preload of the spring.Type: GrantFiled: May 22, 2014Date of Patent: April 26, 2016Assignee: Hilite Germany GmbHInventors: Stefanie Hutzelmann, Falk Mueller, Dietmar Schulze, Manfred Balling, Tobias Matschiner, Christian Scheibe
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Patent number: 9194506Abstract: The invention relates to a central valve for a pivot motor actuator. A housing tube of the central valve includes radial recesses for operating connections. A piston of the central valve has a center position. In the center position both radial recesses are covered by annular bars of the piston towards the tank drain connection by overlaps. Thus, pressure spikes from the operating connections to the check valves are strongly throttled.Type: GrantFiled: April 18, 2014Date of Patent: November 24, 2015Assignee: Hilite Germany GmbHInventors: Stefanie Hutzelmann, Jan Kroepelin, Dietmar Schulze
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Patent number: 9145800Abstract: A sealing device (12) for a camshaft adjuster (1) which is driveable using a belt and has a distributing valve (8) with a piston, wherein the sealing device (12) has a first securing portion (13) rigidly arrangeable on the camshaft adjuster (1), a second securing portion (14) rigidly arrangeable on the piston side, and a flexible membrane portion (15) arranged between the first securing portion (13) and the second securing portion (14), and a camshaft adjuster (1) having a having a stator (3) which, based on a combustion engine, is driveable using a belt, and a rotor (4) with limited twistability relative to the stator (3), wherein a twisting can be effected hydraulically, and a distributing valve (8) with a piston for the purpose of freeing up or blocking the pathway for a hydraulic medium or altering a through-flow direction, wherein the camshaft adjuster (1) has a sealing device (12) of the type whose first securing portion (13) is rigidly arranged on the camshaft adjuster (1) and whose second securing porType: GrantFiled: December 19, 2013Date of Patent: September 29, 2015Assignee: HILITE GERMANY GMBHInventors: Florian Hentsch, Stefanie Hutzelmann, Robert Schaaf, Dietmar Schulze
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Publication number: 20140311333Abstract: A central valve for a pivot motor actuator, the central valve including a housing tube including a first operating connection, a supply connection, a second operating connection and a tank drain connection; a piston enveloped by the housing tube and moveable relative to the housing tube, wherein the first operating connection is connected with the supply connection and the second operating connection is connected with the tank drain connection in a first position of the piston, wherein the piston is positioned in a center position in a second position, and wherein the second operating connection is connected with the supply connection and the first operating connection is connected with the tank drain connection in a third position of the piston, wherein the piston includes at least one first check valve on its outside.Type: ApplicationFiled: March 25, 2014Publication date: October 23, 2014Inventors: Stefanie Hutzelmann, Jan Kroepelin, Dietmar Schulze, Juergen Goll
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Publication number: 20140311594Abstract: The invention relates to a central valve for a pivot motor actuator. A housing tube of the central valve includes radial recesses for operating connections. A piston of the central valve has a center position. In the center position both radial recesses are covered by annular bars of the piston towards the tank drain connection by overlaps. Thus, pressure spikes from the operating connections to the check valves are strongly throttled.Type: ApplicationFiled: April 18, 2014Publication date: October 23, 2014Inventors: Stefanie Hutzelmann, Jan Kroepelin, Dietmar Schulze
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Publication number: 20140230764Abstract: A sealing device (12) for a camshaft adjuster (1) which is driveable using a belt and has a distributing valve (8) with a piston, wherein the sealing device (12) has a first securing portion (13) rigidly arrangeable on the camshaft adjuster (1), a second securing portion (14) rigidly arrangeable on the piston side, and a flexible membrane portion (15) arranged between the first securing portion (13) and the second securing portion (14), and a camshaft adjuster (1) having a having a stator (3) which, based on a combustion engine, is driveable using a belt, and a rotor (4) with limited twistability relative to the stator (3), wherein a twisting can be effected hydraulically, and a distributing valve (8) with a piston for the purpose of freeing up or blocking the pathway for a hydraulic medium or altering a through-flow direction, wherein the camshaft adjuster (1) has a sealing device (12) of the type whose first securing portion (13) is rigidly arranged on the camshaft adjuster (1) and whose second securing porType: ApplicationFiled: December 19, 2013Publication date: August 21, 2014Applicant: Hilite Germany GmbHInventors: Florian Hentsch, Stefanie Hutzelmann, Robert Schaaf, Dietmar Schulze