Patents by Inventor Michael Walder
Michael Walder has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10107223Abstract: 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: GrantFiled: August 1, 2014Date of Patent: October 23, 2018Assignee: MTU FRIEDRICHSHAFEN GMBHInventors: Michael Walder, Robby Gerbeth
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Patent number: 9909524Abstract: 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: GrantFiled: August 21, 2014Date of Patent: March 6, 2018Assignee: MTU FRIEDRICHSHAFEN GMBHInventors: Markus Gölz, Robby Gerbeth, Frank Mlicki, Michael Walder, Carsten Engler, Andreas Mehr, Christian Wolf
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Patent number: 9909547Abstract: 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: GrantFiled: December 7, 2015Date of Patent: March 6, 2018Assignee: MTU FRIEDRICHSHAFEN GMBHInventors: Robby Gerbeth, Michael Walder, Andreas Mehr, Markus Staudt, Frank Mlicki
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Patent number: 9903331Abstract: 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: GrantFiled: August 1, 2014Date of Patent: February 27, 2018Assignee: MTU FRIEDRICHSHAFEN GMBHInventors: Michael Walder, Andreas Mehr, Frank Mlicki, Alexander Bernhard, Christian Wolf
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Patent number: 9617962Abstract: 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: GrantFiled: August 8, 2012Date of Patent: April 11, 2017Assignee: MTU Friedrichschafen GmbHInventors: Manuel Boog, Gerald Fast, Robby Gerbeth, Michael Walder, Ralf Speetzen, Jörg Remele
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Publication number: 20160298570Abstract: 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: ApplicationFiled: August 21, 2014Publication date: October 13, 2016Inventors: Markus GÖLZ, Robby GERBETH, Frank MLICKI, Michael WALDER, Carsten ENGLER, Andreas MEHR, Christian WOLF
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Publication number: 20160186709Abstract: 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: ApplicationFiled: August 1, 2014Publication date: June 30, 2016Applicant: MTU Friedrichshafen GMBHInventors: Michael WALDER, Andreas MEHR, Frank MLICKI, Alexander BERNHARD, Christian WOLF
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Publication number: 20160153382Abstract: 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: ApplicationFiled: August 1, 2014Publication date: June 2, 2016Inventors: Michael WALDER, Robby GERBETH
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Publication number: 20160146145Abstract: A method for correcting the start of injection of injectors of an internal combustion engine, including the following steps: determining a target start of current application depending on at least one parameter of the internal combustion engine; detecting a pressure in an individual accumulator of an injector and determining a measured start of injection on the basis of the pressure; determining a target injection delay depending on at least one parameter of the internal combustion engine; calculating an actual injection delay from the target start of current application and the measured start of injection; comparing the target injection delay and the actual injection delay; and calculating a start-of-current-application correction variable on the basis of the comparison and correcting the target start of current application by the start-of-current-application correction variable.Type: ApplicationFiled: June 16, 2014Publication date: May 26, 2016Inventors: Michael WALDER, Andreas MEHR, Carsten ENGLER, Frank MLICKI, Christian WOLF, Alexander BERNHARD
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Publication number: 20160138509Abstract: A method for determining a start of injection of an injector of an internal combustion engine, including the following steps: time-resolved detecting of an individual storage pressure curve in a measurement interval; determining a test injection start with the aid of the individual storage pressure curve; determining a tendency of the individual storage pressure curve in a predetermined test interval prior to the test injection start; correcting the individual storage pressure curve subject to the tendency; and determining a start of injection with the aid of the corrected individual storage pressure curve.Type: ApplicationFiled: June 3, 2014Publication date: May 19, 2016Inventors: Michael WALDER, Andreas MEHR, Frank MLICKI, Markus STAUDT, Robby GERBETH
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Publication number: 20160084210Abstract: 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: ApplicationFiled: December 7, 2015Publication date: March 24, 2016Applicant: MTU FRIEDRICHSHAFEN GMBHInventors: Robby GERBETH, Michael WALDER, Andreas MEHR, Markus STAUDT, Frank MLICKI
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Publication number: 20140209065Abstract: 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: ApplicationFiled: August 8, 2012Publication date: July 31, 2014Applicant: MTU Friedrichshafen GmbHInventors: Manuel Boog, Gerald Fast, Robby Gerbeth, Michael Walder, Ralf Speetzen, Jörg Remele
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Patent number: 8527181Abstract: A a method for automatically controlling an internal combustion engine, in which an individual accumulator pressure (pE) of a common rail system is detected in a measurement interval and stored; in which an evaluation window is determined for the stored individual accumulation pressure (pE), within which window an injection was brought about; in which, in a first step, both a representative injection start and a trial injection end are determined in this evaluation window as a function of the detected pressure values, and, in a second step, both a trial injection start and a representative injection end are determined in this evaluation window as a function of the detected pressure values; in which the representative injection start is checked for plausibility against the trial injection start; and in which the representative injection end is checked for plausibility against the trial injection end.Type: GrantFiled: November 30, 2010Date of Patent: September 3, 2013Assignee: MTU Friedrichshafen GmbHInventors: Michael Walder, Robby Gerbeth
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Publication number: 20110130944Abstract: A a method for automatically controlling an internal combustion engine, in which an individual accumulator pressure (pE) of a common rail system is detected in a measurement interval and stored; in which an evaluation window is determined for the stored individual accumulation pressure (pE), within which window an injection was brought about; in which, in a first step, both a representative injection start and a trial injection end are determined in this evaluation window as a function of the detected pressure values, and, in a second step, both a trial injection start and a representative injection end are determined in this evaluation window as a function of the detected pressure values; in which the representative injection start is checked for plausibility against the trial injection start; and in which the representative injection end is checked for plausibility against the trial injection end.Type: ApplicationFiled: November 30, 2010Publication date: June 2, 2011Applicant: MTU FRIEDRICHSHAFEN GMBHInventors: Michael WALDER, Robby GERBETH
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Publication number: 20100280743Abstract: An individual accumulator for a high-pressure component of a high-pressure fuel guide of a common rail fuel injection system. The individual accumulator is equipped with a pressure sensor, and the common rail fuel injection system is equipped with a source of high pressure and a fuel injector, which has a fluid connection with this source of high pressure via the high-pressure fuel guide, for injecting the fuel into a working chamber of an internal combustion engine. The pressure sensor is designed as a strain sensor.Type: ApplicationFiled: May 3, 2010Publication date: November 4, 2010Applicant: MTU FRIEDRICHHAFEN GMBHInventors: Marc HEHLE, Robby GERBETH, Joerg REMELE, Guenther SCHMIDT, Ralf SPEETZEN, Michael WALDER, Michael Willmann
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Patent number: 7769530Abstract: For an internal combustion engine with a common rail system including individual accumulators, a process for open- and closed-loop control is proposed, in which the individual accumulator pressure (pE) is detected within a measuring interval and stored, an absolute minimum value of the stored individual accumulator pressure (pE) is interpreted as the end of the main injection, and on the basis of the end of the main injection, a mathematical function is used to calculate a virtual starting time for the main injection. In the measuring interval after the end of the main injection, the individual accumulator pressure (pE) is filtered within a time window, a local minimum value of the filtered individual accumulator pressure is interpreted as the end of a post-injection, and a mathematical function is used to calculate a virtual start of the post-injection.Type: GrantFiled: September 25, 2008Date of Patent: August 3, 2010Assignee: MTU Friedrichshafen GmbHInventors: Marc Hehle, Albert Kloos, Jörg Remele, Günther Schmidt, Ralf Speetzen, Michael Walder, Michael Willmann
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Publication number: 20100076665Abstract: For an internal combustion engine with a common rail system including individual accumulators, a process for open- and closed-loop control is proposed, in which the individual accumulator pressure (pE) is detected within a measuring interval and stored, an absolute minimum value of the stored individual accumulator pressure (pE) is interpreted as the end of the main injection, and on the basis of the end of the main injection, a mathematical function is used to calculate a virtual starting time for the main injection. In the measuring interval after the end of the main injection, the individual accumulator pressure (pE) is filtered within a time window, a local minimum value of the filtered individual accumulator pressure is interpreted as the end of a post-injection, and a mathematical function is used to calculate a virtual start of the post-injection.Type: ApplicationFiled: September 25, 2008Publication date: March 25, 2010Inventors: Marc Hehle, Albert Kloos, Jorge Remele, Gunther Schmidt, Ralph Speetzen, Michael Walder, Michael Willmann
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Patent number: 7536995Abstract: In a method for limiting the power output of an internal combustion engine, an air mass flow deviation of an actual air mass flow (mL(IST)) from a reference air mass flow (ML(REF)) is determined and, depending on the air mass flow deviation, a power output reduction is determined by which the maximum power output limit of the internal combustion engine is to be reduced in order to prevent overheating of the internal combustion engine.Type: GrantFiled: February 21, 2007Date of Patent: May 26, 2009Assignee: MTU Friedrichshafen GmbHInventors: Johannes Baldauf, Michael Walder, Ingo Wintruff
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Publication number: 20070208490Abstract: In a method for limiting the power output of an internal combustion engine, an air mass flow deviation of an actual air mass flow (mL(IST)) from a reference air mass flow (ML(REF)) is determined and, depending on the air mass flow deviation, a power output reduction is determined by which the maximum power output limit of the internal combustion engine is to be reduced in order to prevent overheating of the internal combustion engine.Type: ApplicationFiled: February 21, 2007Publication date: September 6, 2007Inventors: Johannes Baldauf, Michael Walder, Ingo Wintruff