Patents by Assignee MTU Friedrichshafen

Patent number: 9248394
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: Grant
Filed: August 8, 2012
Date of Patent: February 2, 2016
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventors: Dagmar Neu, Ingmar Berger, Patrick Spengler, Timo Stache, Dirk Pfuderer
Publication number: 20150377199
Abstract: A method for venting a fuel supply line of a direct-injection internal combustion engine, wherein the fuel supply line has an injector, a high-pressure accumulator upstream of the injector, a flow rate limiting valve between the high-pressure accumulator and the injector for the purposes of limiting a fuel flow rate passing from the high-pressure accumulator to the injector, and a high-pressure pump upstream of the high-pressure accumulator for delivering fuel into the high-pressure accumulator. A pressure in the high-pressure accumulator is regulated by an intake throttle arranged upstream. of the high-pressure pump. In this case, it is provided that the fuel supply line is vented downstream of the high-pressure pump, wherein, during venting operating mode, a passage cross section for the fuel which is smaller than or equal to a predetermined threshold passage cross section is set in the intake throttle.
Type: Application
Filed: March 5, 2014
Publication date: December 31, 2015
Applicant: MTU Friedrichshafen GmbH
Inventors: Marc RADL, Klaus REISCHMANN, Michael WILLMANN
Publication number: 20150377167
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: Application
Filed: January 23, 2014
Publication date: December 31, 2015
Applicant: MTU Friedrichshafen GmbH
Inventors: Andreas FLOHR, Francois LAYEC
Publication number: 20150369122
Abstract: A method for cleaning a combustion chamber of an internal combustion engine, having the following steps: introducing a gaseous substance into a cooling device, wherein the gaseous substance has, at least upstream of the cooling device, a relative humidity of greater than 0%; cooling the substance in the cooling device to below a dewpoint, such that water precipitate is formed; introducing the substance and the precipitate into a combustion chamber of the internal combustion engine; performing a combustion reaction in the combustion chamber; and discharging residues from the combustion chamber.
Type: Application
Filed: December 19, 2013
Publication date: December 24, 2015
Applicant: MTU Friedrichshafen GmbH
Inventor: Bernhard STILLER
Publication number: 20150369163
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: Application
Filed: January 23, 2014
Publication date: December 24, 2015
Applicant: MTU Friedrichshafen GmbH
Inventors: Ronald HEGNER, Michael WILLMANN, Marc RADL
Publication number: 20150369159
Abstract: A method and an arrangement for operating an internal combustion engine. In the method, an injection start is calculated by a filter, starting from a standard injection start and at least one of the filter parameters is selected in accordance with the operating mode of the internal combustion engine.
Type: Application
Filed: December 19, 2013
Publication date: December 24, 2015
Applicant: MTU Friedrichshafen GmbH
Inventor: Armin DÖLKER
Patent number: 9217444
Abstract: Intake manifold element (1) having a tubular section (3) through which a first fluid (A) can flow in a proposed flow direction (A?) via a flow channel (4) from an inlet (4a) to an outlet (4b) of the same, said tubular section being provided for arrangement on a compressor inlet (11a) of a turbocharger, characterized in that the flow channel (4) has a nozzle-shaped design, wherein its cross-section which the fluid can flow through is tapered in the flow direction (A?), wherein the tubular section (3) forms a chamber (6) adjacent to the nozzle-shaped flow channel (4) which serves as flow path from an inlet (6a) to an outlet (6b) for the aspiration of a second fluid (B), the pressure level of said chamber on the inlet (6a) being dependent on the pressure level of the first fluid (A) on the outlet (4b) of the flow channel (4) via communicating outlets (6b, 4b) of the chamber (6) and the flow channel (4).
Type: Grant
Filed: June 21, 2012
Date of Patent: December 22, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Ingmar Berger, Tobias Männle, Kajetan Plenk
Patent number: 9205829
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: Grant
Filed: December 9, 2013
Date of Patent: December 8, 2015
Assignee: MTU FRIEDRICHSHAFEN GMBH
Inventor: Joachim Hug
Patent number: 9200578
Abstract: A control and regulation method is described for a turbocharged internal combustion engine, in which in a high-performance range (HLB) the turbocharged air is pre-compressed via a two-stage turbocharging process. The described method comprises a low-pressure stage and a high-pressure stage and fed to the internal combustion engine and in which in a low-performance range (NLB) the turbocharged air, pre-compressed via the two-stage turbocharging process, is fed to the internal combustion engine, post-compressed via a compressor as a third turbocharging stage.
Type: Grant
Filed: February 11, 2011
Date of Patent: December 1, 2015
Assignee: MTU Friedrichshafen GmbH
Inventor: Andreas Flohr
Publication number: 20150322840
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: Application
Filed: July 23, 2015
Publication date: November 12, 2015
Applicant: MTU Friedrichshafen GmbH
Inventors: Christian Winkler, Holger Sinzenich, Benjamin Sauter
Patent number: 9181867
Abstract: A carrier housing for a turbocharger arrangement to be fastened at an internal combustion engine includes first, second and third fastening flanges for fastening to turbines of a respective one of a high-pressure turbocharger, a first low-pressure turbocharger, and a second low-pressure turbocharger. The carrier housing is configured such that exhaust can be guided to the turbines of the high-pressure turbocharger, the first low-pressure turbocharger and the second low-pressure turbocharger via a respective one of the first, second and third fastening flanges. The carrier housing includes at least one connection flange by which the fastening flanges are directly in a fluid-guiding connection, with the connection flange being further connected to an exhaust guidance such that exhaust flows from the internal combustion engine through the first and second connection flanges and directly to the carrier housing.
Type: Grant
Filed: October 12, 2012
Date of Patent: November 10, 2015
Assignee: MTU Friedrichshafen GmbH
Inventor: Walter Gauss
Patent number: 9175602
Abstract: The invention relates to a V engine, especially a diesel engine, comprising a first cylinder bank and a second cylinder bank, said V engine being designed for two-stage charging by means of a low-pressure exhaust gas turbocharger and a high-pressure exhaust gas turbocharger. The invention is characterized in that the low-pressure exhaust gas turbocharger and the high-pressure exhaust gas turbocharger are respectively arranged on the front of a cylinder bank above a main output element of the V engine.
Type: Grant
Filed: November 4, 2010
Date of Patent: November 3, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Rolf Gunkel, Felix Henssler, Johannes Hiry, Jörg Andre Reitz, Martin Wiedmann
Publication number: 20150308400
Abstract: The invention relates to an operating process for a lean-burn gas engine having several cylinders, wherein the lean-burn gas engine includes a cylinder-individual gas metering arrangement and a cylinder-individual combustion process capture. The lean-burn gas engine is controlled by a control unit in such a manner that a combustion duration of the individual cylinders is regulated by a control unit, by way of a change of ignition timing of the individual cylinders. The control unit regulates the ignition timing of the individual cylinders in such a way that all cylinders are equalized in regard to their turnover point, so that a defined turnover point is achieved at a defined crank shaft angle.
Type: Application
Filed: April 24, 2015
Publication date: October 29, 2015
Applicant: MTU Friedrichshafen GmbH
Inventors: Aron Toth, Wolfgang Fimml, Alexander Bernhard
Patent number: 9172216
Abstract: A pre-chamber sparkplug is suggested with a central electrode, with at least one ground electrode, which is distanced from the central electrode forming a spark gap, and with at least one transfer bore in a pre-chamber cap. The ground electrode comprises an internal circumferential area, which faces the central electrode, and an external circumferential area, which faces away from the central electrode. The internal circumferential area of the ground electrode shows a concave progression in the longitudinal direction of the pre-chamber sparkplug, subjected to a tensile force, and the external circumferential area shows a convex progression in the longitudinal direction of the pre-chamber sparkplug, subjected to a pressure.
Type: Grant
Filed: May 27, 2011
Date of Patent: October 27, 2015
Assignee: MTU Friedrichshafen GmbH
Inventor: Anko Ernst
Patent number: 9170244
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: Grant
Filed: February 7, 2012
Date of Patent: October 27, 2015
Assignee: MTU Friedrichshafen GmbH
Inventor: Jens Niemeyer
Patent number: 9162423
Abstract: The invention relates to a multilayered bearing shell (2) comprising a back metal layer (3) as a carrier element for the layer structure and at least one further bearing layer joined to the back metal layer (3), wherein the back metal layer (3) is made from a bronze. The back metal layer (3) contains in addition to copper, which forms the matrix of the bronze, tin in a proportion selected from a range with a lower limit of 1.25 wt. % and an upper limit of 12 wt. %, zinc in a proportion selected from a range with a lower limit of 0.25 wt. % and an upper limit of 6 wt. % and phosphorus in a proportion selected from a range with a lower limit of 0.01 wt. % and an upper limit of 0.5 wt. %.
Type: Grant
Filed: June 13, 2012
Date of Patent: October 20, 2015
Assignees: Miba Gleitlager GmbH, MTU Friedrichshafen GmbH
Inventors: Reiner Boeschen, Robert Mergen, Falko Langbein, Ulrich Schmid
Publication number: 20150285180
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: Application
Filed: June 19, 2015
Publication date: October 8, 2015
Applicant: MTU FRIEDRICHSHAFEN GMBH
Inventors: Michael Prothmann, Johannes Baldauf, Markus Fleckhammer
Patent number: 9151195
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: Grant
Filed: October 21, 2011
Date of Patent: October 6, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Mathias Stätter, Josef Walter Hausknecht, Robby Gerbeth
Patent number: 9140665
Abstract: A method for the operational test measurement of a lambda probe, particularly for the purpose of calibrating and/or determining the status of the lambda probe, wherein pure air is circulated around a probe head of the lambda probe is disclosed. The method has the following steps:, —insertion of the lambda probe into a flow receptacle which is separate from an engine construction, in such a manner that an air stream (L) can be circulated around the probe head; generation of an air stream (L) in the flow receptacle; evaluation of probe measurement signals (S), wherein a calibration value is obtained and/or a heating current of the lambda probe is evaluated. A device for carrying out the method, as well as a system, is also disclosed herein.
Type: Grant
Filed: September 7, 2012
Date of Patent: September 22, 2015
Assignee: MTU Friedrichshafen GmbH
Inventor: Tobias Weiss
Patent number: 9140160
Abstract: Exhaust gas aftertreatment units are provided. The units have an encapsulated design that is constructed in a modular manner from disk-shaped components. Exhaust gas flow occurs in the direction of a disk plane, wherein the components are surrounded by frames that are consecutively, in particular elastically, connected and clamped to each other transverse to the disk plane.
Type: Grant
Filed: April 12, 2010
Date of Patent: September 22, 2015
Assignee: MTU Friedrichshafen GmbH
Inventors: Marc Hehle, Hans Sudmanns
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