Patents by Assignee MTU Friedrichshafen
  • Publication number: 20170298841
    Abstract: A diesel engine, in particular a high-power diesel engine, having a variable valve train including an adjusting unit at least for adjusting a cam angle of at least one inlet valve, and a control or regulating unit having at least one operating mode which is for cold starting. The control and/or regulating unit is designed in an operational mode, to adjust the cam angle of the at least one inlet valve to ‘late’ by controlling the adjusting unit.
    Type: Application
    Filed: November 30, 2015
    Publication date: October 19, 2017
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Christoph LUCKAS, Wolfgang FIMML, Johannes SCHALK, Jonathan LIPP
  • Patent number: 9779218
    Abstract: In a method for a model-based determination of a temperature distribution of an exhaust gas post-treatment unit, a differentiation is made between steady operating states and non-steady operating states by taking into account the axial and the radial temperature distribution, and, on the basis of virtual segmentation of the post-treatment unit, in particular the radial heat transfer to the surroundings is taken into account in the model-based determination for steady operating states, and for non-steady operating states the heat transfer from the exhaust gas which flows axially through the post-treatment unit to the segments is taken into account by a heat transfer coefficient k.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: October 3, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Marc Hehle, Ralf Müller, Jens Niemeyer, Jörg Remele, Guido Schäffner, Holger Sinzenich, Tim Späder
  • Patent number: 9752528
    Abstract: A method and an arrangement for operating an internal combustion engine. In the method, an injection start is calculated by a filter, starting from a standard injection start and at least one of the filter parameters is selected in accordance with the operating mode of the internal combustion engine.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: September 5, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Armin Dölker
  • Patent number: 9732704
    Abstract: Gas engine arrangement having a gas engine, a gas rail, via which a first gas in the form of fuel gas can be supplied to at least one gas metering device of the gas engine, and a gas control section, which is designed to supply fuel gas to the gas rail via a supply path on the outflow side. A purge line is passed into the gas rail. The gas engine arrangement is designed to selectively supply fuel gas or a second gas to the purge line, and the gas engine arrangement is designed to displace gas from the gas rail and to discharge it via the supply path when the fuel gas or second gas is supplied to the purge line.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: August 15, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Jan Prunnbauer, Jörg Matthies
  • Patent number: 9726116
    Abstract: A gas mixer for mixing a first gas and a second gas, having a first, outer gas housing part, having an inlet for the first gas in a longitudinal axis and an inlet for the second gas in a transverse axis, a second, interior gas housing part set into the first gas housing part to form an annular space for a second gas, having a mixing space into which the first gas and the second gas are introduced for mixing. The first and second gas housing parts and the annular space are aligned along the longitudinal axis and the mixing space is aligned cylindrically along the longitudinal axis. A mixing device having a plurality of hollow rods is arranged in the mixing space. A hollow space of a hollow rod is in fluid communication on both sides with the annular space. The number of hollow rods extends transverse to the longitudinal axis and the transverse axis and at least one hollow rod has a plurality of openings for the second gas, so that the hollow space is in fluid communication with the cylindrical mixing space.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: August 8, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Markus Raindl
  • Publication number: 20170218898
    Abstract: In a multi-fuel injector for an internal combustion engine, including a housing with a nozzle needle movably disposed therein between a closed position in which the nozzle needle blocks a discharge of fuel from a collection chamber, to which a first fuel is supplied, above the nozzle needle, a control chamber is arranged to which a high pressure second fuel is supplied which acts on the nozzle needle to bias it into a closed position, and a control valve is provided in a pressure release line extending from the control chamber for a controlled release of the second fuel from the control chamber by opening the control valve so as to relief the closing pressure on the nozzle needle in order to permit lifting of the nozzle needle from the closed position for discharging the fuel from the collection chamber.
    Type: Application
    Filed: April 13, 2017
    Publication date: August 3, 2017
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Joachim SCHWARTE, Samuel VOGEL, Robby GERBETH
  • Patent number: 9719452
    Abstract: A method for controlling an internal combustion engine, wherein a first engine control device generates a control signal to actuate a function of the engine. A switchover device transmits the control signal of the first control device to the engine to actuate the function of the engine. The first control device transmits a sign-of-life signal which indicates functionality of the control device to the switchover device. The first engine control device does not transmit the sign-of-life signal or transmits the signal incorrectly if a fault occurs which endangers proper actuation of the function of the engine by the first engine control device. If the sign-of-life signal of the first engine control device is not or is incorrectly received by the switchover device, the switchover device stops transmitting the control signals of the first engine control device and starts transmitting a control signal generated by a second engine control device to the engine to actuate the function of the engine.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: August 1, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Andreas Mehr, Christoph Hirschle, Jan Henker, Roger Elze
  • Publication number: 20170204776
    Abstract: A cooling system including a first coolant line and a second coolant line, at least one first component to be cooled, into which the first coolant line opens, and a first ventilation line. The first ventilation line is fluidically connected to the at least one first component and is configured for ventilating the at least one first component. The first ventilation line opens into the second coolant line.
    Type: Application
    Filed: March 30, 2017
    Publication date: July 20, 2017
    Applicant: MTU Friedrichshafen GmbH
    Inventor: Oliver Markin
  • Patent number: 9689329
    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: Grant
    Filed: April 10, 2015
    Date of Patent: June 27, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Jörg Remele, Aron Toth
  • Publication number: 20170159624
    Abstract: In a tank cleaning arrangement for cleaning liquid fuel stored in a fuel tank, the fuel is circulated from various selectable outlet areas to various selectable inlet areas provided on the tank via a conduit system including circulating pumps and filters arranged at various locations. At least one circulating pump is driven mechanically by an engine associated with the tank cleaning arrangement, whereby the tank cleaning arrangement is shut down automatically when the engine is shut down, so that a control as well as a separate drive system for the at least one circulating pump can be omitted. Also a combustion engine with such tank cleaning system is and an operating method for the tank cleaning arrangement are disclosed.
    Type: Application
    Filed: February 22, 2017
    Publication date: June 8, 2017
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Wolfgang REISCHMANN
  • Patent number: 9670813
    Abstract: The invention relates to a supply system for a medium, in particular for an exhaust-gas purification apparatus for the treatment of exhaust gases of an internal combustion engine, having a storage vessel for the medium, having a dosing device for dosing the medium, and having a provision line which comprises a feed line for the supply of the medium to the dosing device and a return line for returning the medium from the dosing device into the storage vessel. Flow can pass through the dosing device from a feed port to a return port of the dosing device. The provision line comprises an additional fluid connection between the feed line and the return line. The additional fluid connection opens out into the feed line upstream of the feed port of the dosing device and opens out into the return line downstream of the return port of the dosing device.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: June 6, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Christian Winkler, Holger Sinzenich, Benjamin Sauter
  • Patent number: 9670828
    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: Grant
    Filed: May 6, 2015
    Date of Patent: June 6, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Anko Ernst, Udo Sander
  • Patent number: 9664134
    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: Grant
    Filed: April 10, 2015
    Date of Patent: May 30, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Jörg Remele, Aron Toth
  • Patent number: 9657669
    Abstract: Proposed is a method for closed loop rail pressure control of a V-type internal combustion engine with an asymmetrical firing order, wherein an actual rail pressure is computed from the measured rail pressure; a system deviation is determined by means of the actual rail pressure and a set rail pressure; and wherein a correcting variable for actuating a pressure actuating element, in particular a suction throttle, for regulating the rail pressure is computed. The invention is characterized by the fact that the actual rail pressure is computed from the measured rail pressure by means of an averaging filter in that below a limit speed (nLi) the rail pressure is averaged over a constant time and in that above the limit speed (nLi) the rail pressure is averaged over a working cycle of the internal combustion engine.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: May 23, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventor: Armin Dölker
  • Patent number: 9624860
    Abstract: Disclosed is a method for the control and regulation of a V-type internal combustion engine (1), comprising an independent common rail system on the A side and an independent common rail system on the B-side, in which the rotational speed of the internal combustion engine (1) is regulated in a speed control loop and a nominal torque as an adjusted variable of the rotational speed governor is limited during the starting procedure to a starting torque for representing a nominal injection null set.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: April 18, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Armin Dölker
  • Patent number: 9624822
    Abstract: A relief valve for turbines of exhaust turbochargers. Hot exhaust gas flows against this type of relief valves and the relief valves heat up significantly. Sensitive components such as the springs or the membrane can be damaged as a result. The relief valves are normally designed so that the membrane and a radiation panel are adjacent to a first chamber. Air is continuously guided through the first chamber in order to specifically cool the membrane and protect the membrane from excessive heating.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: April 18, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Michael Dobrowolski
  • Patent number: 9624867
    Abstract: Proposed is a method for open-loop and closed-loop control of an internal combustion engine (1), the rail pressure (pCR) being controlled via a low pressure-side suction throttle valve (4) as the first pressure-adjusting element in a rail pressure control loop. The invention is characterized in that a rail pressure disturbance variable is generated to influence the rail pressure (pCR) via a high pressure-side pressure control valve (12) as the second pressure-adjusting element, by means of which fuel is redirected from the rail (6) into a fuel tank (2).
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: April 18, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Armin Dölker
  • Patent number: 9617934
    Abstract: A method for torque control of an internal combustion engine includes a pressure sensor that is associated with at least one, but at the most two cylinders of the internal combustion engine, whereby an cylinder internal pressure for the cylinder associated with the pressure sensor is detected. The method carries out an adjustment of injection characteristics 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. A torque control for the internal combustion engine is performed based on the detected cylinder pressure.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: April 11, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Jörg Remele, Aron Toth
  • Publication number: 20170074146
    Abstract: A method for determining the aging of an oxidation catalyst in an exhaust gas aftertreatment system of an internal combustion engine, having the following steps: ascertaining a soot burn rate of a particle filter of the exhaust gas aftertreatment system; adapting a function having at least one adaptation parameter to the soot burn rate dependent on at least one variable, a value of the adaptation parameter depending on an aging of the oxidation catalyst; and determining the aging of the oxidation catalyst using the adaptation parameter value ascertained by adapting the function.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 16, 2017
    Applicant: MTU Friedrichshafen GmbH
    Inventors: Boban MALETIC, Gerald FAST, Jens NIEMEYER, Tim SPÄDER, Ralf MÜLLER
  • Publication number: 20170067384
    Abstract: A method for regenerating a particle filter during the operation of an internal combustion engine, having the following steps: detecting at least one loading parameter which is characteristic of a present loading of the particle filter, wherein an active regeneration measure can be carried out recurrently in a manner dependent on the loading parameter; determining a time window for a regeneration of the particle filter; and determining a prediction for an operating state of the internal combustion engine expected within the time window, wherein the active regeneration measure at a time indicated for it by the loading parameter is skipped if the prediction predicts that, within the time window, an operating state of the internal combustion engine will arise in which a regeneration of the particle filter takes place without an active regeneration measure.
    Type: Application
    Filed: January 27, 2015
    Publication date: March 9, 2017
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Ralf MÜLLER