Patents by Assignee MTU Friedrichshafen

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
Issued: August 25, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventors: Michael Prothmann, Andreas Flohr, Joerg Remele, Martin Lehmann, Alexander Bernhard, Andreas Krammer
Application 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
Issued: August 20, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventors: Anko Ernst, Udo Sander
Application 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
Issued: August 13, 2015
Assignee: MTU Friedrichshafen GmbH
Inventor: Ronald Hegner
Application 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
Issued: July 30, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Jörg Remele, Aron Toth
Application 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
Issued: July 30, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventor: Armin Dölker
Application 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
Issued: July 30, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Jörg Remele, Aron Toth
Application 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
Issued: July 30, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventors: Jörg Remele, Aron Toth
Patent number: 9051888
Abstract: A method for automatically controlling a stationary gas engine, where an engine speed control deviation is computed from a set engine speed (nSL) and an actual engine speed (nIST), and a set torque is determined as a correcting variable from the speed control deviation by a speed controller, where a set volume flow is determined as a function of the set torque to establish a mixture throttle angle (DKW1, DKW2) and a gas throttle angle, and where the set volume flow is varied to adjust the gas throttle angle by a correction factor.
Type: Grant
Filed: January 30, 2009
Issued: June 9, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventors: Peer Smuda, Michael Prothmann, Ludwig Klaser-Jenewein
Patent number: 9038987
Abstract: For a flap assembly, in particular an exhaust gas flap assembly, with the flap mounted on both sides via bearing devices in the housing, the disclosure describes a design in which a bearing body is supported radially against an annular collar of the bearing device and, by way of the annular collar, is held braced in a radially spring-loaded manner in a predefined radial position.
Type: Grant
Filed: March 16, 2010
Issued: May 26, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Ronald Hegner, Andreas Thoss
Patent number: 9038371
Abstract: In a supply arrangement for supplying a solution containing a reducing agent, in particular urea, to an exhaust gas system of an internal combustion engine wherein a supply line extending from a storage tank to an injector which is connected to the exhaust gas system includes an operating tank and a dosing arrangement, a return line extends between the dosing arrangement and the storage tank and the dosing arrangement includes a directional valve for directing solution to the injector during a first operating mode in which the engine is operating and, in a second operating mode in which the engine is shut down, directing the solution back to the storage tank for emptying the operating tank.
Type: Grant
Filed: August 8, 2011
Issued: May 26, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventor: Nicolas Gräter
Patent number: 9037324
Abstract: A method for controlling a ship propulsion system including a surface propeller, in which the desired capacity is interpreted as the target rotational value, the rotational speed control deviation is calculated from the desired rotational value and the actual rotational value of the internal combustion engine and an injection quantity for the rotational control of the internal combustion engine is determined using the rotational speed control deviation on a rotational speed controller. The trim position of the surface propeller is controlled by an arrangement controller in accordance with the capacity reserve of the internal combustion engine and the actual trim position and the effective rotational speed, the trim position being determined from the rotational speed control deviation.
Type: Grant
Filed: September 25, 2007
Issued: May 19, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventors: Christian Faller, Oliver Haller, Adelbert Kern, Alfred Moehrle, Markus Mueller, Michael Welte
Patent number: 9016061
Abstract: Disclosed is a pipe arrangement (1) comprising a pipe element (2) that is used to connect, in particular fluidically connect, a turbine outlet of one turbocharger (15) to a turbine inlet of another turbocharger (17). The pipe arrangement is characterized in that a first pipe section (8) of the pipe element (2) includes a first fastening device (14) for attaching a first turbocharger (15) as well as a second fastening device (20) for attaching the pipe element (2) to a first support element (21) of an internal combustion engine. Furthermore, a second pipe section (9) includes a third fastening device (16) for attaching a second turbocharger (17) as well as a fourth fastening device (24) for attaching the pipe element (2) to a second support element (25) of an internal combustion engine.
Type: Grant
Filed: November 4, 2010
Issued: April 28, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Rolf Gunkel, Jörg Andre Reitz
Application number: 20150107550
Abstract: A method is proposed for controlling and regulating an internal combustion engine according to the HCCI combustion method, in which a first fuel in a basic mixture is ignited using a pilot fuel, and in which the fuel quantities of the first fuel and the pilot fuel are changed to represent an operating point of the internal combustion engine. The invention is characterized in that a target combustion energy (VE(SL)) is calculated as a function of a power demand and, based on the target combustion energy (VE(SL)), the fuel quantity of the first fuel and the fuel quantity of the pilot fuel are determined using a distribution factor (CHI), wherein the distribution factor (CHI) is calculated as a function of an actual combustion position (VL(IST)) to a target combustion position (VL(SL)) using a combustion position controller (18).
Type: Application
Filed: April 15, 2013
Issued: April 23, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Jörg Remele, Christina Sauer, Aron Toth, Andreas Flohr, Alexander Bernhard, Florian Bach, Erika Schaefer, Ulrich Spicher, Christoph Teetz
Application number: 20150101314
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: Application
Filed: December 17, 2014
Issued: April 16, 2015
Assignee: MTU Friedrichshafen GmbH
Inventor: Tim Späder
Application number: 20150089928
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: Application
Filed: December 9, 2014
Issued: April 2, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventors: Benjamin Sauter, Holger Sinzenich, Katharina Görner, Mathias Bauknecht, Klaus Wehler
Patent number: 8965668
Abstract: A master/slave arrangement of an electronic engine control device with an engine identification module. The electronic engine control device controls and regulates the internal combustion machine. The engine identification module includes at least one microprocessor and a memory building block for storing an engine identification as well as engine specifics. The electronic engine control device and the engine identification module exchange data through an engine cable harness. The engine identification module is arranged inseparably at the crank housing of the internal combustion machine. The engine identification module can be removed from the crank housing as well as from the engine cable harness only by being destroyed.
Type: Grant
Filed: May 2, 2012
Issued: February 24, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Albrecht Debelak, Andreas Schneider, Michael Wölki
Patent number: 8945475
Abstract: An exhaust post-treatment device is designed in a layered fashion and comprises an exhaust cleaning arrangement lying between a supply chamber and a transition chamber with soot filters lying at both sides of a denitrification-catalytic converter unit, with the transition chamber comprising a mixing chamber open towards the denitrification-catalytic converter unit, in which starting at the soot filters via separate guide channels, the exhaust is injected in the opposite direction of flow and which mixing chamber is limited by guide panels, which form walls of the guide channels extending encompassing along the housing towards the mixing chamber.
Type: Grant
Filed: May 9, 2011
Issued: February 3, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Guido Schäffner, Hans Sudmanns, Claudia Riedel
Patent number: 8939129
Abstract: A gas mixer for mixing a first gas and a second gas, including a gas housing, a Venturi tube, a flow body for the first gas arranged in the Venturi tube to form a mixing gap, an inflow tube connected to the Venturi tube, to an inflow opening to the Venturi tube for the second gas, and an actuating element for varying the inflow cross section of the inflow opening. The actuating element has a first and a second actuating part which restrict the inflow cross section. The first actuating part is a first gas housing part and the second actuating part is a second gas housing part. At least one of the gas housing parts forms part of the Venturi tube and/or of the inflow tube At least one of the gas housing parts can be moved with respect to another and has a rotor of a linear motor.
Type: Grant
Filed: May 15, 2012
Issued: January 27, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Johannes Prinz, Manolo Odermatt, Anko Ernst
Patent number: 8918266
Abstract: A method for automatic lambda control of an internal combustion engine, in which, upon detection of a predetermined operating state of the internal combustion engine, a calibration factor (KAL) is determined and in which, during the operation of the internal combustion engine, a lambda measuring signal (iP) is corrected by the calibration factor (KAL) and is set as the actual lambda value (Lam(IST)) for the automatic lambda control of the internal combustion engine. The predetermined operating state is recognized when an engine coastdown is initiated.
Type: Grant
Filed: September 16, 2011
Issued: December 23, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Tobias Weiss, Michael Hönl, Matthias Schweitzer
Patent number: 8886441
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 a closed loop mode in the normal operating state and an emergency operation mode being activated once a defective rail pressure sensor (9) is detected, in which emergency operation the rail pressure (pCR) is controlled in an open loop mode. The invention is characterized in that in the emergency operation mode, the rail pressure (pCR) is gradually increased until a passive pressure relief valve (11) is activated which redirects fuel from the rail (6) to the fuel tank (2) when it is open.
Type: Grant
Filed: October 19, 2010
Issued: November 11, 2014
Assignee: MTU Friedrichshafen GmbH
Inventor: Armin Dölker
1 2 3 4 5 next