Patents Assigned to MTU
  • Generating set preloader
    Patent number: 9130488
    Abstract: An diesel or gas engine-generator unit comprises an internal combustion engine and an alternator, the output of which unit, in use, is adapted to supply electrical power to a site load. The unit is further provided with means to apply a further load (2) to the unit controllable by a switching arrangement (4,5), the unit further comprising a controller, which can be the genset controller, which is adapted to control the switching unit to apply the further load (2) before electrical power is supplied to the site load. This preloading of the generator enables significantly greater load steps to be applied to the genset. The preload can be a resistive, capacitive or inductive load and can also be applied in steps.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: September 8, 2015
    Assignee: MTU Friedrichshafen GmbH
    Inventor: Eric Henin
  • Gas turbine and method of operating a gas turbine
    Patent number: 9121309
    Abstract: A gas turbine including at least one compressor, one combustion chamber, and at least one turbine including at least one rotor and at least one generator coupled to the at least one rotor is provided. The at least one turbine is coupled to the at least one compressor. Once the gas turbine is shut down, the at least one generator can be used as a motor in order to drive the at least one rotor for a predetermined time period following shutdown of the gas turbine and thereby effect a uniform cooling of the rotor. A method of operating a gas turbine is also provided.
    Type: Grant
    Filed: June 10, 2006
    Date of Patent: September 1, 2015
    Assignee: MTU Aero Engines GmbH
    Inventor: Peter Geiger
  • Tie shaft arrangement for turbomachine
    Patent number: 9121280
    Abstract: A turbomachine includes a tie shaft extending along an axis. Multiple rotors are mounted on the tie shaft. First and second clamping members are secured to the tie shaft and exert a clamping load between the rotors and clamping members at multiple interfaces. The clamping load at one of the interfaces includes a radial clamping load of greater than 5% of a total design clamping load at the one interface. In one example, one of the clamping members is provided by a hub including a first leg extending between first and second opposing ends. The first end provides a flange configured to be supported by the tie shaft. The second end includes first and second hub surfaces respectively extending in radial and axial directions. The first leg is inclined between 15° and 75° relative to the axial direction.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: September 1, 2015
    Assignees: UNITED TECHNOLOGIES CORPORATION, MTU AERO ENGINES AG
    Inventors: Daniel Benjamin, Brian C. Lund
  • Method for controlling the nox concentration in the exhaust gas of an internal combustion engine
    Patent number: 9115623
    Abstract: In a method for controlling the NOx concentration in the exhaust gas of an internal combustion engine in which an NOx control deviation is calculated from an actual NOx value and a desired NOx value, a control value is calculated based on the NOx control deviation via an NOx controller and by means of the control value at least one condition of the cylinder inlet flow volume of the internal combustion engine is adjusted in that, additionally, an adaption injection begin is determined in dependence on the control value of the NOx controller, and the injection begin is changed by the adaption injection begin.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: August 25, 2015
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Michael Prothmann, Andreas Flohr, Joerg Remele, Martin Lehmann, Alexander Bernhard, Andreas Krammer
  • Methods for joining a monocrystalline part to a polycrystalline part by means of an adapter piece made of polycrystalline material
    Patent number: 9114480
    Abstract: The present invention relates to methods for joining a rotationally asymmetrical part, preferably a turbine blade, which is made of a monocrystalline material, to a part, preferably a rotor core, which is made of polycrystalline material, having the method steps of: —joining the rotationally asymmetrical part to an adapter piece made of polycrystalline material by means of rotational friction welding, and —joining the adapter piece to the part made of polycrystalline material. The present invention also relates to a turbine blisk having a rotor core made of polycrystalline material and turbine blades made of monocrystalline material.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: August 25, 2015
    Assignee: MTU AERO ENGINES GMBH
    Inventors: Ulrich Knott, Erwin Bayer, Thomas Uihlein
  • Dual blisks in the high-pressure compressor
    Patent number: 9114476
    Abstract: The invention relates to a high-pressure compressor of a gas turbine having at least one blisk, specifically a disk with a plurality of blades that are disposed on the disk, wherein the blisk has at least one titanium material from the group that comprises Ti-6246 and Ti-6242, wherein the materials of the disk and the blades of the blisk differ in their chemical composition and/or their microstructure. The blades are welded to the disk, in particular, by means of a pressure welding method supported by high-frequency current, whereby the current is conducted through the joint surfaces and leads to local limited melting therein.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: August 25, 2015
    Assignee: MTU AERO ENGINES GMBH
    Inventors: Alexander Gindorf, Marcus Klemm
  • MIXTURE-CHARGED GAS ENGINE AND METHOD FOR COMPENSATING FOR VOLUMETRIC EFFICIENCY DEVIATIONS IN A MIXTURE-CHARGED GAS ENGINE
    Publication number: 20150233280
    Abstract: A mixture-charged gas engine includes at least one cylinder. A combustion chamber delimited by a cylinder head, a cylinder wall, and a piston, which can be moved in the cylinder, is arranged in the at least one cylinder, and the combustion chamber is divided into a main combustion chamber and at least one pre-chamber fluidically connected to the main combustion chamber via at least one firing channel. An air-/combustion gas mixture can be supplied to the main combustion chamber via an inlet valve during an intake stroke of the piston. The mixture-charged gas engine is characterized in that a separate combustion gas supply is provided for the at least one pre-chamber.
    Type: Application
    Filed: May 6, 2015
    Publication date: August 20, 2015
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Anko Ernst, Udo Sander
  • SUPERCHARGING UNIT FOR AN INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE
    Publication number: 20150226109
    Abstract: A surpercharging unit for an internal combustion engine has a high-pressure turbine which drives a high-pressure compressor so as to perform a rotational movement about a first axis and through which exhaust gas of the internal combustion engine flows, and having a low-pressure turbine which drives a low-pressure compressor so as to perform a rotational movement about a second axis and through which exhaust gas flows. The high-pressure turbine is arranged rotationally conjointly on a first shaft, and the high-pressure compressor is arranged rotationally conjointly on a second shaft, wherein the first and the second shaft are arranged parallel to one another and are arranged offset with respect to one another, wherein the first and the second shaft are mechanically operatively connected to one another such that the high-pressure compressor can be driven by the high-pressure turbine.
    Type: Application
    Filed: April 21, 2015
    Publication date: August 13, 2015
    Applicant: MTU Friedrichshafen GmbH
    Inventor: Ronald Hegner
  • Turbine of a gas turbine
    Patent number: 9103216
    Abstract: A turbine of a gas turbine, in particular of a gas turbine aircraft engine, having a rotor that has at least one moving blade ring and having a stator that has at least one guide blade ring, moving blades of the, or each, moving blade ring and/or guide blades of the, or each, guide blade ring being fashioned as hollow blades having at least one cavity, wherein on at least one side of at least one moving blade and/or guide blade fashioned as a hollow blade, in a blade wall holes are made that connect the, or each, cavity to the surrounding environment of the respective moving blade and/or guide blade, so that the respective cavity can be used as a resonator or sound muffler in order to reduce the sound radiated by the turbine during operation.
    Type: Grant
    Filed: September 1, 2007
    Date of Patent: August 11, 2015
    Assignee: MTU AERO ENGINES GMBH
    Inventors: Fritz Kennepohl, Detlef Korte
  • Turbine shroud
    Patent number: 9103218
    Abstract: A turbine blade assembly is disclosed. The turbine blade assembly includes a turbine blade and an outer shroud section at the radially outer end of the turbine blade. The turbine blade intersects or joins the shroud section. For increased stiffness, the shroud section has a reinforcing rib extending along its outer face and extending substantially in the direction of the principal axis of inertia.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 11, 2015
    Assignee: MTU Aero Engines GmbH
    Inventors: Bartlomiej Pikul, Krzysztof Sypien, Bartlomiej Wasciszakowski
  • Method for joining components
    Patent number: 9102003
    Abstract: A method for joining at least two components by inductive high-frequency pressure welding is disclosed. The first component has a first material structure with a first hardness and the second component has a second material structure with a second hardness which is smaller than the first hardness. Both components are inductively heated in the region of the joining surfaces and are subsequently pressed together by a compressive force. The joining surface of the first component with the first hardness, which is greater than the second hardness of the second component, is pre-contoured in a spherical, conical or convex manner prior to joining the two components.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: August 11, 2015
    Assignee: MTU Aero Engines GmbH
    Inventors: Joachim Bamberg, Alexander Gindorf, Herbert Hanrieder
  • Generative production method and powder therefor
    Patent number: 9095900
    Abstract: The invention relates to a generative production method for producing a component by selectively melting and/or sintering a powder several times consecutively by introducing an amount of heat by means of beam energy, such that the powder particles melt and/or sinter in layers, wherein the powder particles (1) are made of a first material (2) and the powder particles are surrounded by a second material (3) partially or over the entire surface thereof, wherein the second material has a lower melting point than the first material and/or lowers the melting point of the first material when mixed with the first material. The invention further relates to a corresponding powder and to a prototype produced from said powder.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: August 4, 2015
    Assignee: MTU AERO ENGINES AG
    Inventors: Manuel Hertter, Erwin Bayer, Markus Waltemathe, Klaus Broichhausen, Wilhelm Meir, Bertram Kopperger, Josef Waermann, Andreas Jakimov
  • METHOD FOR FAILURE DETECTION OF INJECTORS IN AN INTERNAL COMBUSTION ENGINE, CONTROL UNIT AND SYSTEM FOR CARRYING OUT A METHOD
    Publication number: 20150211425
    Abstract: The invention relates to a method for detecting the failure of injectors in an internal combustion engine, comprising the following steps: measuring a crank angle signal; transforming the crank angle signal into the frequency range by means of a discrete Fourier transformation; switching off each injector once and in a sequential manner; detecting and storing an angle of the harmonic of the 0.5th order of the Fourier-transformed crank angle signal for each switched-off injector once and in a sequential manner; continuous detection and storage of an angle and an amount of the harmonic of the 0.
    Type: Application
    Filed: April 10, 2015
    Publication date: July 30, 2015
    Applicant: MTU Friedrichshafen GmbH
    Inventors: Jörg Remele, Aron Toth
  • METHOD FOR RAIL PRESSURE REGULATION IN AN INTERNAL COMBUSTION ENGINE
    Publication number: 20150211457
    Abstract: The invention describes a method and an arrangement for the regulation of the rail pressure in an internal combustion engine. In the method, the rail pressure is regulated, with a target high pressure being predefined. Said target high pressure is filtered, before being input, by way of a target high pressure filter which is configured as a dynamic target high pressure filter.
    Type: Application
    Filed: April 3, 2015
    Publication date: July 30, 2015
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Armin Dölker
  • METHOD FOR TORQUE CONTROL OF AN INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE
    Publication number: 20150211426
    Abstract: The invention relates to a method for torque control of an internal combustion engine, wherein a pressure sensor is associated with at least one, but at the most two cylinders of the internal combustion engine, and wherein an cylinder internal pressure for the cylinder associated with the pressure sensor is detected. The method is characterized in that an adjustment of injection characteristics is carried out for the injectors allocated to the individual cylinders of the internal combustion engine by way of a method which is independent from the detected cylinder pressure, and that a torque control for the internal combustion engine is performed based on the detected cylinder pressure.
    Type: Application
    Filed: April 10, 2015
    Publication date: July 30, 2015
    Applicant: MTU Friedrichshafen GmbH
    Inventors: Jörg Remele, Aron Toth
  • METHOD FOR ADJUSTING AN INJECTION BEHAVIOR OF INJECTORS IN AN INTERNAL COMBUSTION ENGINE, ENGINE CONTROL UNIT AND SYSTEM FOR ADJUSTING AN INJECTION BEHAVIOR
    Publication number: 20150211430
    Abstract: The invention relates to a method for adjusting an injection behavior of injectors in an internal combustion engine, including the following steps: switching off an injector; detecting a crank angle signal of the internal combustion engine; transforming the crank angle signal into the frequency range by way of a discrete Fourier transformation; detecting and storing a quantity of the harmonic of the 0.5th order of the Fourier transform of the crank angle signal, and assigning the quantity to the switched-off injector; switching on the switched-off injector; performing the previous steps sequentially for all injectors of the internal combustion engine; forming an average value of the stored quantities with respect to all injectors, and correcting the control of the injectors using a deviation from the average value of a quantity associated with an injector that is to be corrected.
    Type: Application
    Filed: April 10, 2015
    Publication date: July 30, 2015
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Jörg Remele, Aron Toth
  • LOW NOISE TURBINE FOR GEARED TURBOFAN ENGINE
    Publication number: 20150204238
    Abstract: A gas turbine engine includes a fan, a turbine having a fan drive rotor, and a speed reduction device effecting a reduction in the speed of the fan relative to an input speed from the fan drive rotor. The fan drive rotor has a number of turbine blades in at least one of a plurality of rows of the fan drive rotor, and the turbine blades operating at least some of the time at a rotational speed, and the number of turbine blades in the at least one row and the rotational speed being such that the following formula holds true for the at least one row of the fan drive turbine (the number of blades×the rotational speed)/(60 seconds/minute)>4000 Hz. The rotational speed being in revolutions per minute. A method is also disclosed.
    Type: Application
    Filed: April 9, 2014
    Publication date: July 23, 2015
    Applicants: UNITED TECHNOLOGIES CORPORATION, MTU AERO ENGINES AG
    Inventors: Bruce L. Morin, Detlef Korte
  • Damping element and method for damping rotor blade vibrations, a rotor blade, and a rotor
    Patent number: 9074479
    Abstract: A damping system for damping vibrations of a rotor blade of a rotor of a turbomachine is disclosed. A damping element is guided on a support such that the damping element is radially outwardly movable during a rotation of the rotor and is contactable with a lower platform area of a rotor blade. A circumferential contact surface is formed by an elevation on the lower platform area, where the circumferential contact surface is a limit stop for a movement of the damping element.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: July 7, 2015
    Assignee: MTU Aero Engines GmbH
    Inventors: Hans Peter Borufka, Andreas Hartung, Patrick Prokopczuk, Frank Stiehler
  • System for injecting a fluid, compressor and turbomachine
    Patent number: 9074533
    Abstract: A system for injecting a fluid into a wall boundary layer of a flow in a turbomachine is disclosed. The system has a plurality of nozzles which are disposed in a side wall limiting the flow and are oriented diagonally in the direction of flow. The nozzles each have a rectangular, flat nozzle cross-section. A compressor having such a system, as well as a turbomachine having such a compressor, are also disclosed.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: July 7, 2015
    Assignee: MTU Aero Engines GmbH
    Inventor: Sven Hiller
  • Clearance control system, turbomachine and method for adjusting a running clearance between a rotor and a casing of a turbomachine
    Patent number: 9068471
    Abstract: The invention relates to a clearance control system and a method for adjusting a running clearance between a rotor having rotor blades of a turbomachine, and a casing that surrounds at least sections thereof. At least one adjusting gear unit, which can be coupled to at least one casing segment allows for movement of at least one segment radially in relation to the rotational axis of the rotor. An adjusting element can be arranged around the rotor and coupled to at least one adjusting gear unit and can be moved in relation to it for actuating the adjusting gear unit, whereby axial movement and/or pivoting of the adjusting element in relation to the rotor actuates adjustment of the running clearance, with each adjusting gear unit converting an at least predominantly axial movement of the adjusting element into at least predominantly radial movement of the assigned segment of the casing.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: June 30, 2015
    Assignee: MTU AERO ENGINES GMBH
    Inventor: Hermann Klingels