Patents by Inventor Bernhard Hoffmann
Bernhard Hoffmann 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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Publication number: 20090078798Abstract: A fluid injection valve has an inlet, which is set up to receive fluid from a supply line, and which is connected to a chamber, a fluid outlet, which is connected to the chamber, and which is set up to allow fluid to flow out of the fluid injection valve, and a valve arrangement, having a valve seat and a valve member, the valve member being set up to execute opening and closing movements relative to the valve seat. A linear actuator is set up to move the valve member relative to the valve seat, and a spring arrangement exerts on the valve member a spring force which is dependent on the fluid pressure prevailing in the chamber.Type: ApplicationFiled: September 17, 2008Publication date: March 26, 2009Inventors: Andreas Gruendl, Bernhard Hoffmann, Friedrich Mortl
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Patent number: 7476997Abstract: A travelling field machine with a stator and a rotor which are separated by an air gap and each of which comprises at least one stator coil or one rotor coil, with the stator or the rotor, respectively, comprising a soft magnetic iron body with a stator or rotor back, in which spaced grooves are formed, generating teeth, and in each of the grooves several conductor bars of the stator coil or the rotor coil, respectively, are arranged in series comprising end connectors arranged at the faces of the stator or the rotor, respectively, which connect the conductor bars extending across at least one groove, with the conductor bars comprising conductor portions of different length projecting beyond the faces of the stator or rotor, respectively, and the end connectors being arranged in a stacked fashion in the axial direction at the faces of the stator or the rotor.Type: GrantFiled: June 30, 2004Date of Patent: January 13, 2009Assignee: Compact Dynamics GmbHInventors: Andreas Gründl, Bernhard Hoffmann
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Publication number: 20080284259Abstract: A linear actuator is provided with a rotor and a stator. The rotor comprises at least two stacks of permanently magnetic rods one over another, the stacks being arranged at a predetermined distance from each other. The stator is at least partly produced from a soft magnetic material, and comprises at least two pairs of teeth with teeth opposite each other, each pair of teeth receiving one of the two stacks between them while forming an air gap. The stator has at least two magnetically conducting inner areas which are located between the two stacks and arranged at a predetermined distance from each other in the direction of motion of the rotor. The inner areas are each at least partially surrounded by a substantially hollow cylindrical coil arrangement, the central longitudinal axis of which is oriented substantially transversely to the direction of motion of the rotor.Type: ApplicationFiled: March 30, 2006Publication date: November 20, 2008Applicant: Compact Dynamics GmbHInventors: Andreas Grundl, Bernhard Hoffmann
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Publication number: 20080278229Abstract: An active compensation filter for the application in the electric power supply in a land vehicle, which comprises a high-pass filter which is to be coupled with a supply voltage line which carries a supply voltage, in order to detect frequency and amplitude of interference voltage components of the supply voltage. A signal amplifier which is connected in series with the high-pass filter amplifies the detected interference voltage components and supplies them to a coupling element as output signals, which is connected in series with the signal amplifier and comprises a primary side and a secondary side. The primary side is fed with the output signals of the signal amplifier and the secondary side is looped into the supply voltage line.Type: ApplicationFiled: May 8, 2008Publication date: November 13, 2008Inventors: Andreas Grundl, Bernhard Hoffmann, Alexander Kleimaier
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Publication number: 20080252150Abstract: A linear actuator in an electric percussion tool is equipped with a rotor and a stator, wherein the rotor has at least two stacks, which are arranged at a predetermined distance from one another, of superposed permanently magnetic bars, the stator is formed, at least partially, from a soft-magnetic material and has at least two pairs of teeth with mutually opposed teeth, of which each pair of teeth receives one of the two stacks between them, in each case, while forming an air gap, and wherein the stator has at least two magnetically conductive inner regions which are located between the two stacks, are arranged at a predetermined distance from one another in the direction of movement of the rotor and are at least partially surrounded, in each case, by an essentially hollow-cylindrical coil arrangement, the central longitudinal axis of which is oriented approximately transversely to the direction of movement of the rotor, and the rotor has a driving element which is able to transmit a mechanical impulse to aType: ApplicationFiled: March 31, 2006Publication date: October 16, 2008Applicant: Compact Dynamics GmbHInventors: Andreas Grundl, Bernhard Hoffmann
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Publication number: 20080092854Abstract: A fuel injection valve for fuel injection systems of internal combustion engines, in particular for injecting fuel directly into a combustion chamber of an internal combustion engine, said fuel injection valve comprising a fuel inlet which is designed to allow fuel to flow into the fuel injection valve, and an actuating device which can be electrically activated and cooperates with a valve arrangement in order to discharge fuel into the combustion chamber in a directly or indirectly controlled manner via a fuel outlet the actuating device having a solenoid arrangement which is to be energized, a substantially magnetically soft magnet yoke arrangement which cooperates therewith, and a substantially magnetically soft magnet armature arrangement which cooperates therewith. The magnet yoke arrangement is constituted by at least two yoke discs. At least one of the faces of each yoke disc has at least one pole web which together with the solenoid arrangement acts upon the magnet armature arrangement.Type: ApplicationFiled: July 1, 2005Publication date: April 24, 2008Applicant: COMPACT DYNAMICS GMBHInventors: Andreas Grundl, Bernhard Hoffmann
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Publication number: 20080095647Abstract: A fluid-pressure generator, in order to generate a high pressure-level in fluids at high speed in a small construction space, with an inlet which is adapted to receive fluid from a supply line, with an electrically triggerable actuating device which is adapted to interact with an ejection-valve arrangement in order to allow fluid to flow out through a fluid outlet, wherein the fluid outlet is connected to a chamber by a flow duct, a displaceable piston, which is provided for the purpose of changing the volume of the chamber, projects into the chamber, and the piston is to be actuated by an electromagnet arrangement in the sense of a diminution of volume, the electromagnet arrangement exhibiting a stator and an armature, and the stator taking the form of a multipole stator which exhibits one or more excitation coils assigned to the respective stator poles.Type: ApplicationFiled: September 19, 2005Publication date: April 24, 2008Inventors: Andreas Grundl, Bernhard Hoffmann
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Publication number: 20080048493Abstract: A brake unit for a hydraulic, single-circuit or multi-circuit braking system of a land vehicle, with fluid on-off valves to be operated electrically, an electronic closed-loop/open-loop control circuit to provide control signals for the fluid on-off valves by which the hydraulic pressure in the brake circuits is modulated, a unit body, which consists of at least two ceramic boards connected to each other, and which has the fluid on-off valves, hydraulic connecting lines between the fluid on-off valves being incorporated in the boards, and at least one of the boards being used as the carrier board for electrical/electronic components and electrical connecting lines of the electronic open-loop/closed-loop control circuit.Type: ApplicationFiled: August 10, 2007Publication date: February 28, 2008Applicant: Compact Dynamics GmbHInventors: Andreas Grundl, Bernhard Hoffmann
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Patent number: 7279820Abstract: A machine with transversal flux comprises a stator and a rotor. Therein, either the stator has a coil arrangement and the rotor is provided with permanent magnet elements, or the rotor may have a coil arrangement and the stator is provided with permanent magnet elements. The coil arrangement has at least one cylindrical winding and is encompassed by a magnetic flux yoke which in a sectional view along the centre longitudinal axis of the coil arrangement is approximately C-shaped. The magnetic flux yoke has a leg at each end which at least partially encompasses one face each of the coil arrangement. At one surface area of the coil arrangement several magnetic flux conducting pieces are arranged coaxially with the centre longitudinal axis of the coil arrangement in several rows. Under the formation of an air gap, the permanent magnet elements are arranged whose magnetic orientation towards the air gap is alternating.Type: GrantFiled: June 3, 2004Date of Patent: October 9, 2007Assignee: Compact Dynamics GmbHInventors: Andreas Gründl, Bernhard Hoffmann
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Publication number: 20070216249Abstract: In a transverse flux machine, the rotor has multiple permanent magnet rings that are arranged axially in proximity to one another. The stator surrounds the rotor concentrically in at least some sections, forming an air gap. The stator has multiple stator coils oriented coaxially with the permanent magnet rings and the stator coil has two terminals. An active reactive power source to be controlled has two terminals for each stator coil, the respective stator coil being connected to each. In the event of a fault incident in one of the stator coils, a monitoring arrangement supplies triggering signals for the active reactive power source so that the two terminals of the respective stator coil are interconnected with a low resistance.Type: ApplicationFiled: April 28, 2006Publication date: September 20, 2007Applicant: MTU Aero Engines GmbHInventors: Andreas Gruendel, Hubert Herrmann, Bernhard Hoffmann
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Publication number: 20070052315Abstract: A travelling field machine with a stator and a rotor which are separated by an air gap and each of which comprises at least one stator coil or one rotor coil, with the stator or the rotor, respectively, comprising a soft magnetic iron body with a stator or rotor back, in which spaced grooves are formed, generating teeth, and in each of the grooves several conductor bars of the stator coil or the rotor coil, respectively, are arranged in series comprising end connectors arranged at the faces of the stator or the rotor, respectively, which connect the conductor bars extending across at least one groove, with the conductor bars comprising conductor portions of different length projecting beyond the faces of the stator or rotor, respectively, and the end connectors being arranged in a stacked fashion in the axial direction at the faces of the stator or the rotor.Type: ApplicationFiled: June 30, 2004Publication date: March 8, 2007Applicant: Compact Dynamics GmbHInventors: Andreas Grundl, Bernhard Hoffmann
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Publication number: 20060244329Abstract: A machine with transversal flux comprises a stator and a rotor. Therein, either the stator has a coil arrangement and the rotor is provided with permanent magnet elements, or the rotor may have a coil arrangement and the stator is provided with permanent magnet elements. The coil arrangement has at least one cylindrical winding and is encompassed by a magnetic flux yoke which in a sectional view along the centre longitudinal axis of the coil arrangement is approximately C-shaped. The magnetic flux yoke has a leg at each end which at least partially encompasses one face each of the coil arrangement. At one surface area of the coil arrangement several magnetic flux conducting pieces are arranged coaxially with the centre longitudinal axis of the coil arrangement in several rows. Under the formation of an air gap, the permanent magnet elements are arranged whose magnetic orientation towards the air gap is alternating.Type: ApplicationFiled: June 3, 2004Publication date: November 2, 2006Inventors: Andreas Grundl, Bernhard Hoffmann
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Publication number: 20060209494Abstract: An electronic assembly for switching electric power, comprising two power supply buses spaced from each other between which semiconductor switches to be driven by means of a control input are arranged at a power output for providing electric power, a capacitor arrangement bridging the two power supply buses, which extends at least partially over the length of the power supply buses, two contact layers originating from one each of the power supply buses and covering the capacitor arrangement at least partially, with the contact layers comprising free end portions which mutually project one another towards the respective other one of the power supply buses, and with the two contact layers having a freely accessible contact area each which is adapted for contact making with correspondingly configured power terminals.Type: ApplicationFiled: June 11, 2004Publication date: September 21, 2006Inventors: Andreas Grundl, Bernhard Hoffmann
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Publication number: 20060175568Abstract: An electrically actuated valve arrangement for the controlled opening and closing of a working chamber of an internal-combustion engine, with an electrical linear drive unit which, depending on electrical triggering signals, causes a valve stem of the valve arrangement to execute longitudinal movements between an open position and a closed position of the valve arrangement, with at least one actuating element and an engagement element interacting with said actuating element, one of these elements being arranged in torsion-resistant manner on the valve stem and the other of these elements being arranged statically in relation to the mobile valve stem in such a manner that prior to reaching the open or closed position of the valve stem the engagement element and the actuating element come into engagement with one another and trigger a rotary movement which is superimposed on the longitudinal movement of the valve stem.Type: ApplicationFiled: January 23, 2004Publication date: August 10, 2006Inventors: Andreas Grundl, Bernhard Hoffmann
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Patent number: 7049716Abstract: The invention concerns a fluid-cooled electrical machine with a housing in which are arranged a stator and a rotor with stator and/or rotor coils, wherein the electrical machine is coupled heat-conductively with a cooling device arranged on its periphery and connected with an electronic power control. The electronic power control is divided into several modules, each of which are electrically connected with at least one of the stator and/or rotor coils, wherein the modules are arranged distributed on the periphery of the electrical machine and coupled heat-conductively with the cooling device.Type: GrantFiled: March 15, 2002Date of Patent: May 23, 2006Assignee: Compact Dynamics GmbHInventors: Andreas Gründl, Bernhard Hoffmann
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Publication number: 20060096795Abstract: Hybrid drive for a motor vehicle with a drive train, comprising a combustion engine and a vehicle transmission with variable gear ratio and a first and second electrical machine which can be operated both as a motor and a generator, each of which comprises a stator and a rotor with the second electrical machine being in a permanent nonpositive connection with an input of the vehicle transmission, with a shiftable clutch each being arranged between the electrical machines and the drive shaft of the combustion engine, and with the electrical machines to be connected with each other and/or an electrical energy source via an electronic control circuit. The two electrical machines are to be arranged in a common housing, and one of the stators of the electrical machines together with the electronic control circuit and/or the other stator is accommodated on a common carrier.Type: ApplicationFiled: October 14, 2003Publication date: May 11, 2006Inventors: Andreas Grundl, Bernhard Hoffmann, Reinhard Rasch, Friedrich Mortl, Hans Glonner, Georg Gotz, Jorg Michael, Markus Kaindl
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Patent number: 7014587Abstract: An automatic powershift gearbox with at least one gearbox assembly for selecting the respective gear ratios and with at least one multiple-disk clutch capable of being actuated in a controlled manner for holding or releasing individual elements of the planet gear, which allows gear shift operations without interrupting the torque flow. The multiple-disk clutch comprises a first and a second disk set which are in mutual engagement and can be brought into friction engagement by axial compression against one another. The first disk set is connected with a first shaft, and the second disk set is connected with a second shaft. The multiple-disk clutch is coupled by a transmission with an electric machine comprising a rotor and a stator, for bringing the two disk sets into and out of friction engagement by means of the electric machine. The rotor of the electric machine is supported rotatably and axially movable on one of the shafts by means of a gearbox for converting a rotary motion into a thrust motion.Type: GrantFiled: March 19, 2002Date of Patent: March 21, 2006Assignee: Compact Dynamics GmbHInventors: Andreas Grundl, Bernhard Hoffmann
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Patent number: 6958560Abstract: The invention relates to a winding arrangement for an electric machine with a polyphase winding, in which a plurality of coils or coil groups connected in parallel (50, 52, 54, 56) are connected with a conductor rail (40, 42, 44, 46). This makes it possible to connect the coil ends directly and without connecting pieces with the electric power supply. The conductor rails (40, 42, 44, 46) are preferably arranged at one or both face sides of the post of the electric machine below the slot openings, i.e., in the area of the back of the post. Furthermore, the invention is aimed at an corresponding manufacturing method for a winding arrangement of a polyphase winding for an electric machine, in which the coils or coil groups connected in parallel (50, 52, 54, 56) of the winding are connected with one of the conductor rails (40, 42, 44, 46).Type: GrantFiled: February 15, 2002Date of Patent: October 25, 2005Assignee: Temic Automotive Electric Motors GmbHInventors: Georg Holzheu, Ulrich Masberg, Michael Menhart, Andreas Gründl, Bernhard Hoffmann, Reinhard Rasch
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Patent number: 6930428Abstract: The invention relates to an assembly of an electric machine with at least two abutting circular ring or circular disk-shaped sheet metal layers, wherein each of the sheet metal layers is formed by several circular ring or circular disk-shaped sheet metal segments which are arranged concentrically about a centre axis, of which two each are abutting under the formation of a connecting joint and comprise a predetermined minimum cross-sectional area in the radial direction, and with the sheet metal segments of abutting sheet metal layers partially overlapping one another in the circumferential direction and are joined by welds distributed along the circumferential area, with the number of welds between a connecting joint of two sheet metal segments of a sheet metal layer and a connecting joint of two sheet metal segments of a neighbouring sheet metal layer being calculated in such a manner that the sum of the effective areas of these welds is at least approximately equal to the predetermined minimum cross-sectionType: GrantFiled: March 5, 2002Date of Patent: August 16, 2005Assignee: Compact Dynamics GmbHInventors: Andreas Gründl, Bernhard Hoffmann
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Publication number: 20050151439Abstract: A travelling field machine with a stator and a rotor, each of which comprising at least one stator coil or one rotor coil, respectively, with the stator or the rotor, respectively, comprising a soft magnetic iron body with a stator or rotor back, respectively, in which spaced grooves are formed, generating teeth and the stator or rotor coils, respectively, comprising conductor bars arranged in the grooves of the stator or the rotor, respectively, and end windings arranged at the end faces of the stator or the rotor, respectively, and with the stator or rotor coils, respectively, in the area of the end windings being angled at least partially and essentially transverse to the bottom of the grooves and protruding from the bottom of the grooves at least partially in the direction of the stator or rotor backs, respectively.Type: ApplicationFiled: September 4, 2002Publication date: July 14, 2005Inventors: Andreas Grundl, Bernhard Hoffmann