Patents by Assignee MTU Friedrichshafen

Patent number: 8855889
Abstract: A method for open-loop and closed-loop control of an internal combustion engine (1) in which the rail pressure (pCR) is controlled via a low pressure-side suction throttle (4), as the first pressure-adjusting element in a rail pressure control loop. A rail pressure disturbance variable (VDRV) is generated to influence the rail pressure (pCR) via a high-pressure side pressure control valve (12), as the second pressure-adjusting element, by which fuel is redirected from the rail (6) into the fuel tank (2). The position of the high-pressure side pressure control valve (12) is determined by a PWM signal (PWMDV), which, when normal mode is set, is calculated as a function of the resulting target volume flow and, when protective mode is set, is temporarily set to a maximum value.
Type: Grant
Filed: June 17, 2010
Issued: October 7, 2014
Assignee: MTU Friedrichshafen GmbH
Inventor: Armin Dölker
Patent number: 8844501
Abstract: The invention relates to a control and regulation method for an internal combustion engine having a common rail system, wherein a rail pressure is regulated in normal operation in that a first actual rail pressure is determined via a first filter from the rail pressure, an offset is calculated from a target rail pressure and the first actual rail pressure, a variable is calculated via a pressure regulator from the offset and a PWM signal having a first PWM frequency (f1) for activation of a control process is determined in dependence on the variable.
Type: Grant
Filed: November 9, 2009
Issued: September 30, 2014
Assignee: MTU Friedrichshafen GmbH
Inventor: Armin Dölker
Application number: 20140230435
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: Application
Filed: July 10, 2012
Issued: August 21, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Claus-Oliver Schmalzing, Holger Frank, Philippe Gorse, Peter Riegger
Application number: 20140209065
Abstract: Exemplary illustrations are provided of a common rail system for an internal combustion engine, having a rail for fuel and an injector for the purpose of injecting the fuel into a working space of the internal combustion engine, said injector having a fluid connection to said rail via a high-pressure conduit. The high-pressure conduit may have a high-pressure component with an individual reservoir, and the high-pressure conduit and/or the rail may have a pressure measurement device. The pressure measurement device may be coupled to a local logic and storage device of a decentralized, local electronic device which is designed for the purpose of locally analyzing and storing measurement data of the pressure measurement device, e.g., injector data and/or rail data, and the pressure measurement device is connected to the central electronic device via a bus, with the local logic and storage device connected between the same.
Type: Application
Filed: August 8, 2012
Issued: July 31, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Manuel Boog, Gerald Fast, Robby Gerbeth, Michael Walder, Ralf Speetzen, Jörg Remele
Application number: 20140208701
Abstract: An air scoop-cyclone filter assembly having an air scoop for guiding untreated air, which including an inlet opening, a deflection area for deflecting untreated air and an outlet opening, and having a cyclone filter for cleaning untreated air, which is connected downstream of the air scoop in the flow direction and is connected in an airtight manner to the air scoop A perforated plate is arranged in the cyclone filter as a filter inlet opening. The perforated plate has a first passage area having a high number of holes, a second passage area having a low number of holes at the geodetically deepest point, and a baffle plate. The baffle plate distributes the untreated air flow through the first and second passage area and, with the outer wall of the air scoop, forms a collecting chamber that stabilizes the flow.
Type: Application
Filed: August 8, 2012
Issued: July 31, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Dagmar Neu, Ingmar Berger, Patrick Spengler, Timo Stache, Dirk Pfuderer
Patent number: 8768546
Abstract: The invention relates to a method for controlling a railway vehicle having a double drive system, wherein each drive system comprises an internal combustion engine and a transmission unit, wherein a target drive torque (M(SL)) is provided as a power requirement by means of a drive lever, wherein an actual drive torque (M(IST)) of the railway vehicle is determined and a drive torque deviation is calculated from the target drive torque (M(SL)) and the actual drive torque (M(IST)). The method further comprises determining a prediction drive type (AAP), and a target drive type (AA(SL)) in the sense of a single or double drive, a target operating point (BP(SL)), and a target transmission stage (US(SL)) are set for the transmission units, based on the drive torque deviation and the prediction drive type (AAP), by means of a traction manager (9).
Type: Grant
Filed: March 11, 2010
Issued: July 1, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Holger Bottlang, Ingo Lehmann, Michael Willmann
Application number: 20140162836
Abstract: A method for operating a traction vehicle, especially a locomotive, wherein the power delivered by a drive system is produced by at least two internal combustion engines, each of which is functionally connected to a generator for producing electric power, the engines preferably being gas engines, even more preferably lean gas engines. A previously determined number of separate power stages ranging from a minimum power up to a nominal power of the drive system is provided. The interval between all directly adjacent power stages is selected so that it corresponds to a constant fraction of the nominal power of the drive system.
Type: Application
Filed: December 9, 2013
Issued: June 12, 2014
Assignee: MTU Friedrichshafen GmbH
Inventor: Joachim HUG
Application number: 20140156168
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: Application
Filed: June 5, 2012
Issued: June 5, 2014
Assignee: MTU Friedrichshafen GmbH
Inventor: Armin Dölker
Patent number: 8720407
Abstract: In an engine crankcase including a crankshaft supported at its front end by a crankshaft bearing having a crankshaft bearing cover including a bearing top part and a bearing bottom part and a front end gear drive arranged in front of the crankcase for driving auxiliary component and including a first drive gear mounted onto the crankshaft, a second gear mounted to the auxiliary component and an intermediate gear in meshing engagement with the first and second gears and supported on a support plate, the support plate is screwed onto the crankcase, the bearing top part and the bearing bottom part.
Type: Grant
Filed: October 21, 2011
Issued: May 13, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Joachim Pfau, Jürgen Giesselmann, Manfred Sulzmann
Application number: 20140123950
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: Application
Filed: April 27, 2012
Issued: May 8, 2014
Assignee: MTU Friedrichshafen GmbH
Inventor: Armin Dölker
Application number: 20140109876
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: Application
Filed: April 19, 2012
Issued: April 24, 2014
Assignee: MTU Friedrichshafen GmbH
Inventor: Armin Dölker
Application number: 20140102422
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: Application
Filed: May 15, 2012
Issued: April 17, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Johannes Prinz, Manolo Odermatt, Anko Ernst
Application number: 20140102731
Abstract: In a method tor the emergency cooling of a battery or an emergency extinguishing of the battery of a water vehicle including such a battery with a watertight containment, upon determination of an emergency, the battery is flooded by ambient water drawn from around the water vehicle.
Type: Application
Filed: November 25, 2013
Issued: April 17, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Peter Riegger, Gerhard Filip
Patent number: 8688352
Abstract: A method for automatically controlling an internal combustion engine, in which an axial displacement (s(t)) and an angle of rotation (w(t)) of a gas-exchange valve are measured during a valve stroke. A displacement deviation is computed from the displacement (s(t)) relative to a reference valve, and an angle of rotation deviation is computed from an initial value and an end value of the angle or rotation. The further operation of the internal combustion engine is set on the basis of the displacement deviation and the angle of rotation deviation.
Type: Grant
Filed: August 4, 2010
Issued: April 1, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Marc Hehle, Holger Frank, Michael Willmann
Patent number: 8683983
Abstract: The invention relates to a method for regulating a stationary gas motor (1). In said method, a deviation of the regulated speed is calculated from a desired speed and an actual speed, a desired moment is determined as an adjustable variable from the deviation of the regulated speed by means of a speed governor, said desired moment being limited to an air ratio-limiting moment by limiting the moment, and a desired volume flow (VSL) is determined from the limited desired moment in order to define an angle (DKW1, DKW2) of the mixture throttle valve and an angle of the gas throttle valve.
Type: Grant
Filed: November 17, 2008
Issued: April 1, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Johannes Baldauf, Peer Smuda, Ludwig Klaeser-Jenewein
Application number: 20140083083
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: Application
Filed: October 8, 2013
Issued: March 27, 2014
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventors: Michael Prothmann, Andreas Flohr, Joerg Remele, Martin Lehmann, Alexander Bernhard, Andreas Krammer
Application number: 20140030810
Abstract: A method and an arrangement for dynamic breakthrough detection is proposed. The arrangement comprises at least a transfer element, at least a memory unit in which sensor characteristic curves, at least a controller and an evaluation logic are stored.
Type: Application
Filed: February 7, 2012
Issued: January 30, 2014
Assignee: MTU Friedrichshafen GmbH
Inventor: Jens Niemeyer
Application number: 20140026560
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: Application
Filed: March 8, 2012
Issued: January 30, 2014
Assignee: MTU Friedrichshafen Gmbh
Inventor: Michael Dobrowolski
Application number: 20140032189
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: Application
Filed: February 7, 2012
Issued: January 30, 2014
Assignee: MTU Friedrichshafen GmbH
Inventors: Marc Hehle, Ralf Müller, Jens Niemeyer, Jörg Remele, Guido Schäffner, Holger Sinzenich, Tim Späder
Application number: 20130276743
Abstract: A crankcase for an internal combustion engine, having a suction arrangement which is assigned to the crankcase and is configured for ventilating the crankcase of blow-by gas, in particular a gas/oil mixture, to produce a limited vacuum in the crankcase is disclosed. The crankcase has at least one dividing wall which is configured to feed blow-by gas and to separate oil. A ventilating housing part and a carrier housing part which is arranged above the ventilating housing part in included in the crankcase. The dividing wall is formed between the ventilating housing part and the carrier housing part and a suction arrangement is formed in the form of a suction jet pump which is configured for extracting oil from the dividing wall.
Type: Application
Filed: October 21, 2011
Issued: October 24, 2013
Assignee: MTU Friedrichshafen GmbH
Inventors: Mathias Stätter, Josef Walter, Robby Gerbeth