Patents by Assignee MTU Friedrichshafen
  • 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: 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: 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: 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: 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: 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: 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
  • Patent number: 9574508
    Abstract: The invention relates to a method and an arrangement for operating an internal combustion engine. In the method a first distribution of values for at least one variable is used, the variable describing a physical property of the internal combustion engine, and over a second time period values for this variable are recorded and classified, such that a second distribution is determined. The first distribution is then compared with the second distribution such that the behavior of the internal combustion engine can be adapted on the basis thereof.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: February 21, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventor: Tim Späder
  • Patent number: 9574515
    Abstract: A method for operating an internal combustion engine having at least one fuel injection valve for introducing fuel into a combustion chamber of the internal combustion engine, the valve being supplied with a specified current intensity in order to adjust a specified flow cross-section of a fuel fluidic connection in the combustion chamber. The maximum specified current intensity during normal operation is equal to a first current intensity and during a release operation is equal to a second, higher current intensity.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: February 21, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Ronald Hegner, Michael Willmann, Marc Radl
  • Patent number: 9562459
    Abstract: Reciprocating-piston internal combustion engines having different power outputs are to be equipped simply, reliably and inexpensively with a device for the selective catalytic reduction of the exhaust gases having an SCR module for a reciprocating-piston internal combustion engine, comprising a housing and/or a frame, an exhaust-gas section which delimits a flow duct for guiding through exhaust gas, having an inlet opening for introducing the exhaust gas and an outlet opening for discharging the exhaust gas, an SCR catalytic converter which is arranged inside the flow duct, at least one injection element for adding a reducing agent, for example ammonia or a urea solution, to the exhaust gas which is guided through the flow duct. This problem is solved by virtue of the fact that the SCR module comprises at least one delivery device (13) for feeding the reducing agent to the injection element at a predetermined pressure.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: February 7, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Benjamin Sauter, Holger Sinzenich, Katharina Görner, Mathias Bauknecht, Klaus Wehler
  • Patent number: 9556840
    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: Grant
    Filed: April 3, 2015
    Date of Patent: January 31, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventor: Armin Dölker
  • Patent number: 9458786
    Abstract: Proposed is a method for monitoring a passive pressure limiting valve (11) via which fuel is discharged from the rail (6) of a common rail system into the fuel tank (2), in which method, upon the detection of a defective rail pressure sensor (9), a switch is made from a rail pressure regulation mode into an emergency mode, wherein in the emergency mode, the rail pressure is successively increased until the pressure limiting valve (11) reacts, in which method, in the emergency mode, the pressure limiting valve (11) is set as open when the starting phase of the internal combustion engine has additionally been detected as having ended, and in which method, in addition, the opening duration of the pressure limiting valve (11) is monitored.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: October 4, 2016
    Assignee: MTU Friedrichshafen GmbH
    Inventor: Armin Dölker
  • Patent number: 9441572
    Abstract: Proposed is a method for controlling and regulating an internal combustion engine (1), in which the rail pressure (pCR) is controlled via a suction throttle (4) on the low pressure side as a first pressure-adjusting element in a rail pressure control loop. The invention is characterized in that a rail pressure disturbance variable (VDRV) is generated in order to influence the rail pressure (pCR) via a pressure control valve (12) on the high pressure side as a second pressure-adjusting element, by means of which fuel is redirected in a controlled manner from the rail (6) into a fuel tank (2), the rail pressure disturbance variable (VDRV) being calculated using a corrected target volume flow (Vk(SL)) of the pressure control valve (12).
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: September 13, 2016
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Armin Dölker
  • Patent number: 9441530
    Abstract: In a connection box for direct connection to a charging fluid duct of a charging fluid supply designed for intermixing a charge air and an exhaust gas to form a charging fluid, comprising a housing with a charge air connecting space including at least a connection for a charge air guide arrangement, and at least one mixing channel in communication with the charge air connecting space via a connection for supplying charge air to the mixing channel and the mixing channel including a supply side exhaust gas connection for an exhaust gas recirculation and a charging fluid-side mixing channel connection for the charging fluid duct, the connection is arranged at a first front side of the housing, and the mixing channel extends along a longitudinal side of the housing from the first front side to a second front side of the housing opposite the first front side.
    Type: Grant
    Filed: April 28, 2012
    Date of Patent: September 13, 2016
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Hermann Baumann, Dominik Seiderer, Walter Gauss
  • Patent number: 9441537
    Abstract: The exemplary illustrations generally include a method for controlling and regulating an internal combustion engine-generator system 1000 with a plurality of internal combustion engine-generator units 400 generating electric power which can be connected to a distribution grid and load consumers 200 consuming electric power, with a unit 400 comprising an internal combustion engine 401, 402, 404-408 with variable engine speeds and a generator 421-428, characterized in the steps: determining a given operating state Z* of the internal combustion engine 401, 402, 404-408 of at least one internal combustion engine-generator unit 400; deducting a range of operating states ZB* describing an electric load override Ladm depending on the given operating state Z* for the internal combustion engine of at least one internal combustion engine-generator unit 400, with the determination of the given operating state Z* and the deduction of the range of operating range ZB* occurring based on the calculation model 504 for the in
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: September 13, 2016
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Gerhard Filip, Claus-Oliver Schmalzing, Hans-Juergen Thomas, Tobias Kohl
  • Patent number: 9422885
    Abstract: The present invention relates to a method for reducing the particle emissions of an internal combustion engine over its service life. The number of cylinders of the internal combustion engine in which post-injection is carried out is incrementally increased during the service life of the internal combustion engine. The increase in the number of cylinders receiving a post-injection may depend upon at least one parameter, which may be a running time, a distance performance, a particle concentration in exhaust gas, a load profile, or other parameter. The individual cylinders receiving post-injection may be changed to distribute wear.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: August 23, 2016
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Michael Prothmann, Johannes Baldauf, Markus Fleckhammer