Patents by Assignee MTU Friedrichshafen
  • 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: 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: 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: 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: 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: 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: 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
  • Patent number: 9416715
    Abstract: A method and an arrangement for monitoring an exhaust system of an internal combustion engine. Temperature profiles upstream and downstream of an installation location of a catalytic converter are measured in order to determine whether or not a catalytic converter is installed.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: August 16, 2016
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Jens Niemeyer, Aron Toth, Tim Spaeder
  • Patent number: 9404413
    Abstract: The invention relates to an internal combustion machine (10), comprising a combustion engine (1) having an exhaust gas side (AGS) and a charging fluid side (LLS), and having a supercharger system (14) comprising an exhaust gas turbo charger (40) for charging the combustion engine (1), having a condenser array (41) on the charging fluid side (LLS) and a turbine arrangement (42) on the exhaust gas side (AGS), a compressor (3), the primary side (I) of which is connected to the charging fluid side (LLS), and the secondary side (II) of which is connected to the exhaust gas side (AGS). An electric machine (4) configured as a motor/generator is coupled to the combustion engine (1), wherein the electric machine (4) as a generator can be powered by the combustion engine (1), or can power the combustion engine (1) as a motor, wherein the compressor (3) can be powered directly by the electric machine (4) via a mechanical drive coupling (13).
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: August 2, 2016
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Claus-Oliver Schmalzing, Holger Frank, Philippe Gorse, Peter Riegger
  • Patent number: 9404508
    Abstract: The invention relates to a suction housing (1) for an internal combustion engine, especially for arranging between a first (2) and a second (3) compressor of an internal combustion engine, characterized in that the suction housing (1) comprises an inner space (8) defined by a bottom element (9), a first (10) and a second (11) opposing lateral wall elements projecting from the bottom element (9), and a first (12) and a second (13) opposing front wall elements projecting from the bottom element. An open end (14) having an inlet (14a) via which charge air can enter the inner space (8) of the suction housing (1) is formed opposite the bottom element (9), and a web element (17) projecting from the bottom element (9) and arranged between the first (10) and the second (11) lateral wall elements is located in the inner chamber, said web element interconnecting the first (12) and the second (13) front wall elements.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: August 2, 2016
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Rolf Gunkel, Johannes Hiry, Jörg Andre Reitz
  • Publication number: 20160186709
    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: Application
    Filed: August 1, 2014
    Publication date: June 30, 2016
    Applicant: MTU Friedrichshafen GMBH
    Inventors: Michael WALDER, Andreas MEHR, Frank MLICKI, Alexander BERNHARD, Christian WOLF
  • Patent number: 9371773
    Abstract: A two-stage supercharger for an engine having a radial high-pressure turbine and an axial low-pressure turbine. The high-pressure turbine has a spiral housing with an exhaust-gas inlet connected to an exhaust line and via which exhaust-gas flows from the engine to the high-pressure turbine. A partial flow of the exhaust-gas flows past the high-pressure turbine in a bypass unit and is adjustable by a shut-off valve. The bypass unit includes a branch line and an annular duct housing integral with the spiral housing. The branch line branches off the exhaust-gas inlet at a point where the shut-off valve is arranged and issues into a duct of the annular duct housing. The partial flow flows through the branch line into the duct and an axially arranged annular gap into an exhaust-gas duct. The partial flow merges with a main exhaust-gas flow from the high-pressure turbine and flows into the low-pressure turbine.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: June 21, 2016
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Andreas Thoss, Thomas Zink
  • Publication number: 20160159338
    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: Application
    Filed: February 18, 2016
    Publication date: June 9, 2016
    Applicant: MTU Friedrichshafen GmbH
    Inventors: Eckhard Osterloff, Martin Roscher, Arndt Von Drathen, Gerhard Droullier
  • Patent number: 9347409
    Abstract: Proposed is a method for controlling and regulating an internal combustion engine (1) having a common rail system and having a passive pressure limiting valve (11) for discharging fuel out of a rail (6) into the fuel tank (2), in which method, in a first stage, the pressure limiting valve (11) is set as open when the rail pressure, proceeding from a steady-state rail pressure, exceeds a first threshold value and subsequently falls below a second threshold value within a first critical time, wherein the first threshold value characterizes a higher pressure level than the steady-state rail pressure and the second threshold value characterizes a lower pressure level than the first threshold value, and in which method the opening duration of the opened pressure limiting valve (11) is monitored.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: May 24, 2016
    Assignee: MTU Friedrichshafen GmbH
    Inventor: Armin Dölker
  • Publication number: 20160123205
    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 agerelated 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: Application
    Filed: April 16, 2014
    Publication date: May 5, 2016
    Applicant: MTU Friedrichshafen GmbH
    Inventors: Guido SCHÄFFNER, Andrea PROSPERO, Günter ZITZLER, Tim SPÄDER
  • Patent number: 9328689
    Abstract: The invention relates to a method for the open-loop control and the closed-loop control of an internal combustion engine (1), the rail pressure (pCR) being controlled in the normal operating state in a closed loop control mode via an intake throttle (4) on the lower pressure side as the first pressure control member in a rail pressure control loop and at the same time a rail pressure disturbance variable being applied to the rail pressure (pCR) via a pressure control valve (12) on the high pressure side as the second pressure control member. For this purpose, a pressure control valve volume flow (VDRV) is redirected from the rail (6) to a fuel tank (2) via the pressure control valve (12) on the high pressure side, and an emergency operation mode is activated once a defective rail pressure sensor (9) is detected, in which emergency operation the pressure control valve (12) on the high pressure side and the intake throttle (4) on the low pressure side are actuated depending on the same set point value.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: May 3, 2016
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventor: Armin Dölker