Patents Assigned to MTU Friedrichshafen GmbH
  • Publication number: 20180313247
    Abstract: An exhaust gas aftertreatment system with an exhaust gas inlet, at least two exhaust gas aftertreatment elements, and a flow chamber. The exhaust gas inlet, the at least two exhaust gas aftertreatment elements, and the flow chamber are arranged relative to one another and fluidically connected together such that exhaust gas flowing through the exhaust gas inlet into the flow chamber can be distributed to the at least two exhaust gas aftertreatment elements. The exhaust gas passes through at least one first of the at least two exhaust gas aftertreatment elements along a first flow direction, and the exhaust gas passes through at least one second of the at least two exhaust gas aftertreatment elements along a second flow direction, wherein the first flow direction and the second flow direction are oriented at least diagonally to each other, preferably anti-parallel to each other.
    Type: Application
    Filed: October 6, 2016
    Publication date: November 1, 2018
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Mathias BAUKNECHT, Michael ENGELHARDT, Boban MALETIC, Samuel VOGEL
  • Patent number: 10107223
    Abstract: A method for determining at least one injection parameter of an internal combustion engine, including the following steps: detecting a pressure profile in a time-resolved manner in an injection system of an internal combustion engine at least during an injection; providing a reference pressure profile for at least one operating point of the injection system; comparing the detected pressure profile with the reference pressure profile, and ascertaining at least one injection parameter as a function of the comparison.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: October 23, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Michael Walder, Robby Gerbeth
  • Patent number: 10060318
    Abstract: A method for operating a driving system having an internal combustion engine and an exhaust gas purifying device through which exhaust gas from the internal combustion engine flows in order to be purified. The exhaust gas purifying device has at least one catalyst element for catalytic conversion of nitrogen monoxide into nitrogen dioxide at a determined conversion rate. In order to compensate for an age related decrease in the conversion rate of the catalyst element the nitrogen monoxide emission from the internal combustion engine and/or the exhaust gas temperature before the catalyst element are adjusted as a function of the current conversion rate and/or the age of the catalyst element so that the nitrogen dioxide concentration after the catalyst element is greater than or equal to a minimum concentration and/or that the molar ratio between nitrogen monoxide and nitrogen dioxide after the catalyst element corresponds to a predetermined ratio.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: August 28, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Guido Schäffner, Andrea Prospero, Günter Zitzler, Tim Späder
  • Publication number: 20180223776
    Abstract: An internal combustion engine including a cylinder head, a fresh air duct configured for providing a fresh air supply to the internal combustion engine, and a quick-closing valve arranged in the fresh air duct, upstream of the cylinder head of the internal combustion engine, in order to interrupt the fresh air supply. The internal combustion engine also includes an exhaust gas recirculation pipe that has an outlet opening that is arranged centrally in the fresh air duct and, in a flow direction of the fresh air supply, upstream of the quick-closing valve forming a minimum gap between the outlet opening and the quick-closing valve.
    Type: Application
    Filed: April 5, 2018
    Publication date: August 9, 2018
    Applicant: MTU Friedrichshafen GmbH
    Inventors: Hermann Braun, Thomas Rode, Christian-Paul Stelzer
  • Publication number: 20180223773
    Abstract: A power generating assembly including an internal combustion engine and a combustion gas supply connected to the internal combustion engine in order to supply combustion gas. The combustion gas supply has an at least double-walled line at least in the region of the internal combustion engine, the line having an inner line volume for combustion gas and an outer line volume. The outer line volume is fluidically connected to an inert gas supply. The power generating assembly also includes a combustion gas pressure adjusting device that adjusts a combustion gas pressure in the inner line volume, and an inert gas pressure adjusting device that adjusts an inert gas pressure in the outer line volume. The combustion gas pressure adjusting device and the inert gas pressure adjusting device select the inert gas pressure and the combustion gas pressure such that the inert gas pressure is higher than the combustion gas pressure.
    Type: Application
    Filed: July 7, 2016
    Publication date: August 9, 2018
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Manuel BOOG, Wolfgang FIMML, Jan Gerrit PRUNNBAUER
  • Patent number: 10035503
    Abstract: A system control unit for controlling a charging system that is intended for charging an electrical energy storage device, comprising an electric generator; an internal combustion engine that is mechanically connected with the electric generator; a generator controller for controlling the electric generator; an engine controller for controlling the internal combustion engine; and a transmitting device for transmission of messages, whereby the engine controller is connected with the generator controller by way of the transmitting device, and whereby the engine controller is operable in that a message containing information about an operating state of the internal combustion engine can be produced and said message can be sent to the generator controller via the transmitting device.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: July 31, 2018
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Eckhard Osterloff, Martin Roscher, Arndt Von Drathen, Gerhard Droullier
  • Publication number: 20180202338
    Abstract: A method for operating an exhaust after-treatment system including an SCR-catalyst, a metering device for dosing a reducing agent being controlled on the basis of a determining variable that influences a nitrogen-oxide concentration downstream of the SCR-catalyst. A breakthrough identification is carried out for the SCR-catalyst, wherein if a breakthrough is identified, the determining variable is altered to a higher nitrogen-oxide concentration downstream of the SCR-catalyst and the metering device is controlled in order to dose the reducing agent on the basis of the altered determining variable.
    Type: Application
    Filed: June 28, 2016
    Publication date: July 19, 2018
    Applicant: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Klaus RUSCH, Jörg REMELE, Jens NIEMEYER
  • Patent number: 9982633
    Abstract: A gas internal combustion engine, having a gas mixer, an intake section and an engine to which a fuel mixture having a charging mixture is fed. The engine is operated in the gas mode with gas as the fuel in the charging mixture. By an input mixture portion, from an earlier mixture state, of a gas/air mixture, an output mixture portion, from a later mixture state, of the gas/air mixture is determined by an intake section model. The output mixture portion is determined at an engine feed, the input mixture portion is determined over a number of intermediate states of the mixture portion in a number of assigned volumes of the intake section. The intake mixture portion of a gas/air mixture is determined at the gas mixer, and an air stream and/or gas stream is set at the gas mixer in accordance with the input mixture portion.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: May 29, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Andreas Flohr, Andreas Geller
  • Patent number: 9982621
    Abstract: A method for operating an internal combustion engine having a hardware structure including an engine control unit and a maintenance unit, an electronic engine identification module and an engine control program, the method having the steps: providing a computer program product via a network by which an engine identification and engine data are loaded together and are exchanged, wherein the computer program product is designed for uploading and/or downloading a maintenance software module by which the engine identification and the engine data are compiled; loading the computer program product onto a non-volatile storage medium; coupling the non-volatile storage medium to the maintenance unit of the hardware structure and executing the computer program product; exchanging the maintenance software module between the non-volatile storage medium and the maintenance unit; identifying the engine and compiling engine data by the maintenance software module and a hardware component of the hardware structure.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: May 29, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Albrecht Debelak, Andreas Schneider, Michael Wölki
  • Patent number: 9982620
    Abstract: A method for correcting a fuel quantity injected by a fuel injection device during operation of an internal combustion engine, including: determining an air heat characteristic variable, on which an air heat stream fed to a combustion chamber of the engine functionally depends; determining an exhaust heat characteristic variable, on which an exhaust heat stream discharged from the combustion chamber functionally depends; determining a heat distribution factor, which specifies a fraction of the exhaust heat stream reduced by the air heat stream in relation to a heat stream fed with the injected fuel to the combustion chamber; calculating a fuel mass fed to the engine from the air heat characteristic variable, the exhaust heat characteristic variable and the heat distribution factor; calculating a comparison variable by comparing the calculated fuel mass with a fuel mass setpoint value and adapting actuation of the fuel injection device depending on the comparison variable.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: May 29, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Andreas Flohr, Francois Layec
  • Patent number: 9927159
    Abstract: A method for operating a system for a thermodynamic cycle with a multi-flow evaporator having at least two evaporator flow channels, wherein the evaporator flow channels are made to approximate each other with respect to at least one operating parameter of the individual evaporator flow channels, and/or wherein a pressure drop across the evaporator is automatically controlled.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: March 27, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Niklas Waibel, Daniel Stecher, Gerald Fast, Tim Horbach, Jens Niemeyer, Max Lorenz, Mathias Müller
  • Patent number: 9909547
    Abstract: In a quantity limiting valve for a fuel injection system of an internal combustion engine including a cylinder with an inflow region and an outflow region separated by a piston axially movably disposed in the cylinder and a flow limiting fluid flow path extending along the piston between the inflow and outflow regions wherein the piston is biased with its front surface into contact with a stop element, the contact area between the front surface and the stop surface includes between the piston and the stop element a contact structure providing for an intermediate space which is in communication with the inflow region thereby to expose the front surface of the piston to the pressure of the fluid in the inflow region.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: March 6, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Robby Gerbeth, Michael Walder, Andreas Mehr, Markus Staudt, Frank Mlicki
  • Patent number: 9909518
    Abstract: A method for controlling the speed of an internal combustion engine and a speed control circuit for carrying out the method. For controlling, fuel energy is used as an output variable. The control units are calculated in accordance with a stationary proportion gain which is calculated proportionally to the fuel energy and inversely proportional to the engine speed.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: March 6, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Armin Dölker
  • Patent number: 9909524
    Abstract: A method for operating an internal combustion engine having a motor with cylinder and an injection system having a common rail and injectors for the cylinders. Each injector has an accumulator for holding fuel from the common rail. A multiple injection of fuel is performed during each working cycle of a cylinder, including injecting a first amount in a first injection and injecting a second amount in a second injection, and determining fuel pressure for the common rail and/or the accumulator. A fuel injection amount parameter is determined for the first injection; an individual accumulator pressure and/or a common rail pressure is determined for the second injection; and a fuel injection amount parameter is determined for the second injection. The individual accumulator pressure and/or the common rail pressure are/is considered for determining the injection amount parameter of the fuel for the second injection.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: March 6, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Markus Gölz, Robby Gerbeth, Frank Mlicki, Michael Walder, Carsten Engler, Andreas Mehr, Christian Wolf
  • Patent number: 9903331
    Abstract: A method for the injector-specific diagnosis of a fuel injection device of an internal combustion engine, including the following steps: detecting a pressure progression in an individual accumulator of an injector in a time-resolved manner; evaluating the detected pressure progression; determining if there is a fault state of the injection device in the region of the injector on the basis of the detected and evaluated pressure progression; and identifying the fault state on the basis of the detected and evaluated pressure progression.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: February 27, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Michael Walder, Andreas Mehr, Frank Mlicki, Alexander Bernhard, Christian Wolf
  • Patent number: 9890720
    Abstract: A method for operating an internal combustion engine, which has: an intake section and an engine with an number of cylinders and a receiver which is arranged upstream of the cylinders wherein the intake section has: a supercharging system with a compressor and a bypass for bypassing the supercharging system, and wherein the receiver is assigned an engine throttle, and the bypass is assigned a compressor bypass throttle; and a setting of the engine throttle and/or of the compressor bypass throttle is set as a function of the operation in order to influence a charge fluid. The intake section is assigned an intake section model by which at least a mass flow and/or state of the charge fluid upstream of the engine are/is determined and on the basis of a determination result the compressor bypass throttle is set as a function of the engine throttle.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: February 13, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Andreas Flohr, Andreas Geller, Alexander Bernhard
  • Patent number: 9890684
    Abstract: A method and a device for operating an exhaust gas aftertreatment, wherein a diesel particulate filter is regenerated during the operation, in particular passively regenerated, wherein a corrected differential pressure is calculated from a current differential pressure across the diesel particulate filter at a current exhaust gas volumetric flow rate and with a current correction factor. The current correction factor is determined by determining a lower differential pressure in a predetermined time interval at a defined exhaust gas volumetric flow rate, in particular in a specified exhaust gas volumetric flow rate interval around the defined exhaust gas volumetric flow rate, and comparing the lower differential pressure with a specified current reference value and, depending thereon, calculating a new correction factor or retaining the previous correction factor as the current correction factor.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: February 13, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Andrea Prospero, Tim Späder, Stefan Merk
  • Patent number: 9890735
    Abstract: A method and an assembly for controlling the pressure in a high-pressure region of an injection system in an internal combustion engine. A set high pressure is compared to an actual high pressure in order to determine a control deviation, the control deviation representing an input variable of a controller. A high pressure pump is controlled by a solenoid valve and the angle at which the delivery of fuel by the at least one high-pressure pump is to start is used as a manipulated variable of the high-pressure closed-loop control system.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: February 13, 2018
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Armin Dölker
  • Patent number: 9840964
    Abstract: A supercharging 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: Grant
    Filed: April 21, 2015
    Date of Patent: December 12, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventor: Ronald Hegner
  • Patent number: 9803535
    Abstract: The invention relates to the cooling system of an internal combustion engine (10) which comprises a combustion engine (12) having at least two cylinder banks (14, 16) and a number of exhaust gas exchangers (18, 20) identical to the number of cylinder banks, as well as a retarder connection, wherein the cooling system can be flown through by a fluid serving as coolant in a preferred flow direction and comprises a cooling system trunk section (30) and a number of cooling system branch sections identical to the number of the cylinder banks (14, 16) of the combustion engine (12), said cooling system branch sections comprising each a cylinder bank branch section (22, 24), an exhaust gas exchanger branch section (36, 38) and a combining branch section (44, 46). The invention further relates to an internal combustion engine (10) corresponding thereto.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: October 31, 2017
    Assignee: MTU Friedrichshafen GmbH
    Inventors: Felix Henssler, Jörg Andre Reitz