Patents by Inventor Stefan Haase

Stefan Haase 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).

  • Publication number: 20230304455
    Abstract: A method for operating an internal combustion engine, in particular of a motor vehicle, wherein fuel is injected in a fuel injection device in a plurality of time-spaced partial injections per duty cycle directly into a combustion chamber of the internal combustion engine.
    Type: Application
    Filed: March 22, 2023
    Publication date: September 28, 2023
    Applicant: Volkswagen Aktiengesellschaft
    Inventors: Stefan HAASE, Lasse FRUEHLING, Mario BEYER, Rene MATSCHENZ
  • Publication number: 20230286318
    Abstract: A tool for transferring a motor vehicle into a rollable state despite a parking lock having been activated includes a base which is fastenable to a vehicle wheel of the motor vehicle and an actuating element which is displaceable along a sliding direction relative to the base and via which, in a state of the base fastened to the vehicle wheel, by displacement of the actuating element along the sliding direction relative to the base, displacing a propeller shaft of the motor vehicle, a toothing engagement between a first toothing of the propeller shaft and a second toothing of a wheel hub can be undone, as a result of which the motor vehicle can be transferred into the rollable state. A travel limiting device specifies a travel by which the actuating element can be displaced at most relative to the base in order to undo the toothing engagement.
    Type: Application
    Filed: March 13, 2023
    Publication date: September 14, 2023
    Inventors: Stefan HAASE, Martin ROSSHUBER, Stefan SCHOENBERGER
  • Publication number: 20220396539
    Abstract: A process for producing methanol, wherein a make-up gas stream from a reformer unit is admixed with a hydrogen-containing stream from a hydrogen recovery stage to obtain a hydrogen-rich synthesis gas, which is combined with a residual gas stream and the combined stream is passed through a bed of a methanol synthesis catalyst at elevated pressure and elevated temperature to obtain a product stream comprising methanol and the residual gas stream and wherein the product stream is cooled to remove methanol from the residual gas stream. Wherein a portion of the residual gas stream is removed as a purge gas stream and a portion of the hydrogen-rich synthesis gas stream is removed and combined with the purge gas stream to obtain a mixed synthesis gas stream and the mixed synthesis gas stream is sent to the hydrogen recovery stage to produce the hydrogen-containing stream.
    Type: Application
    Filed: October 23, 2020
    Publication date: December 15, 2022
    Inventors: Veronika GRONEMANN, Stefan HAASE, Lutz JANKO, Hans KOPETSCH, Chin Han LIM
  • Patent number: 11456465
    Abstract: A method for producing a bipolar plate for a fuel cell stack includes the following steps: providing two half-plates made of sheet metal, which form the bipolar plate when arranged on top of one another, wherein the half-plates are profiled via deformation of the sheet metal, and wherein, as a result of the profiling, the two half-plates arranged on top of one another contact at at least one contact region and do not contact at at least one non-contact region; carrying out at least one first cut in the non-contact region of at least one half-plate, before the half-plates are arranged on top of one another; Arranging the two half-plates on top of one another and connecting same; and carrying out at least a second cut in the contact region through both half-plates after they have been arranged on top of one another and connected.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: September 27, 2022
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Stefan Haase
  • Patent number: 11387468
    Abstract: A separator plate for at least one fuel cell of a fuel cell system is provided. The separator plate includes at least one seal, wherein the seal is designed to seal at least one media-conducting inner region from a non-media-conducting outer region. The separator plate additionally includes at least one spacer element, which is preferably arranged in the outer region. The separator plate can be contacted by an evaluating device in a contacting region, this region being located such that it lies, in part, between the seal and spacer element. According, a deformation of the separator plate in the contacting region within a fuel cell stack is thus prevented.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: July 12, 2022
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Stefan Haase
  • Patent number: 11211630
    Abstract: A housing is provided for a fuel cell stack. The housing includes two end plates, two opposite side walls, a lateral connecting wall, and at least one media exchange element. The two end plates are arranged at the two ends of the fuel cell stack. The two opposite side walls connect the end plates to each other. The lateral connecting wall connects the opposite side walls to each other. The at least one media exchange element has media connections. At least the two end plates are each designed as an extruded supporting structure. The media connections are not fed across the end plates.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: December 28, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Stefan Haase, Fabian Heining, Lukas Wittchen
  • Patent number: 11145878
    Abstract: A fuel cell having an ion-selective separator, a gas diffusion layer and a separator plate, is provided. The separator plate forms, together with the gas diffusion layer, at least one gas-conducting flow field. At least one convergent duct section and at least one divergent duct section are formed in the flow field, wherein the convergent duct section lies adjacent to the divergent duct section. A barrier is provided between the convergent duct section and the divergent duct section such that the gas flows at least partially through the gas diffusion layer in order to pass directly from the convergent duct section into the divergent duct section. At least one additional convergent duct section, at least one additional divergent duct section and at least one additional barrier are provided downstream of the convergent duct section and/or downstream of the divergent duct section.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: October 12, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Stefan Haase
  • Patent number: 11063278
    Abstract: A method for making contact with a plurality of separator plates of a fuel cell system includes the steps of: inserting at least one connecting element of a cell voltage monitoring system between two directly adjacent separator plates so that two connecting parts of the connecting element that are able to move with respect to one another are arranged at least in certain regions between the directly adjacent separator plates; and relatively moving the two connecting parts that are able to move with respect to one another so that at least one first connecting part of the connecting parts moves at least in sections toward a separator plate of the directly adjacent separator plates.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: July 13, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Marco Hausrath, Florian Kriesch, Stefan Haase
  • Patent number: 11031608
    Abstract: A connecting element for making electrical contact with at least one separator plate of a fuel cell stack includes a housing and a contact element which is arranged in the housing and has a contact end for making contact with the separator plate and has a connection end for connection to a continuing line. A positive z-direction is defined from the contact end in the direction of the connection end. A cutout is provided in the housing, wherein the contact element is positioned in the cutout. The contact end is arranged on a first side of the cutout. The connection end is arranged on the second side of the cutout. The contact element has an interlocking element which bears in an interlocking manner against the housing on the first side of the cutout.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: June 8, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Stefan Haase, Florian Kriesch
  • Patent number: 10892510
    Abstract: A method is provided for producing an energy supply unit for a vehicle having a housing and a stack, realized as a fuel-cell stack, battery stack or capacitor stack, arranged in the housing. The method includes providing the housing, including first and second tie-rod plates and first and second pressure-plate arrangements, wherein each pressure-plate arrangement is fastened to each tie-rod plate, arranging the stack between the two tie-rod plates and between the two pressure-plate arrangements, applying a bracing force to the two pressure-plate arrangements for the purpose of bracing the stack, and fastening at least the first pressure-plate arrangement to both tie-rod plates while the bracing force is being maintained upon the two pressure-plate arrangements. At least one pressure-plate arrangement includes a tolerance compensation system including an end plate securely connected to the tie-rod plates, a contact-pressure plate arranged between the end plate and the stack, and a positioning arrangement.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: January 12, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Thomas Hoefler, Paul Eitzenberger, Martin Moser, Lukas Wittchen, Stefan Haase
  • Patent number: 10784522
    Abstract: A fuel cell having an anode-cathode stack includes at least one active surface layer formed by a first channel structure with a first and at least one second channel for conducting a first fluid over the at least one active surface layer of the anode-cathode stack. A first distributor structure for distributing the first fluid into the first and the at least one second channel of the channel structure is provided. The first distributor structure is configured with a first surface region assigned to the first channel and with a second surface region assigned to the second channel. The two surface regions are configured with a flow resistance of differing magnitude for the first fluid distributed in the first distributor structure.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: September 22, 2020
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Andreas Buchner, Michael Bauer, Stefan Haase
  • Patent number: 10727509
    Abstract: A method for repairing a fuel cell stack having a plurality of individual cells involves the steps of: a) identifying at least one degraded individual cell in the fuel cell stack; and b) deactivating the at least one degraded individual cell.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: July 28, 2020
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Stefan Kreitmeier, Stefan Haase
  • Publication number: 20190341631
    Abstract: A separator plate for at least one fuel cell of a fuel cell system is provided. The separator plate includes at least one seal, wherein the seal is designed to seal at least one media-conducting inner region from a non-media-conducting outer region. The separator plate additionally includes at least one spacer element, which is preferably arranged in the outer region. The separator plate can be contacted by an evaluating device in a contacting region, this region being located such that it lies, in part, between the seal and spacer element. According, a deformation of the separator plate in the contacting region within a fuel cell stack is thus prevented.
    Type: Application
    Filed: July 18, 2019
    Publication date: November 7, 2019
    Inventor: Stefan HAASE
  • Publication number: 20190312286
    Abstract: A connecting element for making electrical contact with at least one separator plate of a fuel cell stack includes a housing and a contact element which is arranged in the housing and has a contact end for making contact with the separator plate and has a connection end for connection to a continuing line. A positive z-direction is defined from the contact end in the direction of the connection end. A cutout is provided in the housing, wherein the contact element is positioned in the cutout. The contact end is arranged on a first side of the cutout. The connection end is arranged on the second side of the cutout. The contact element has an interlocking element which bears in an interlocking manner against the housing on the first side of the cutout.
    Type: Application
    Filed: June 18, 2019
    Publication date: October 10, 2019
    Inventors: Stefan HAASE, Florian KRIESCH
  • Patent number: 10276880
    Abstract: A method is provided for producing a fuel cell, which method includes the arrangement of in each case one gas diffusion layer with in each case one bipolar plate on a respective side of a membrane electrode arrangement which comprises an anode, a cathode and an electrolyte membrane arranged between the anode and the cathode. The gas diffusion layers are set back in relation to the bipolar plates and the membrane electrode arrangement. The gas diffusion layers have in each case at least one reaction fluid supply region and in each case at least one reaction fluid discharge region and in each case at least one reaction fluid sealing region. The method is characterized by injecting a sealing material into at least one reaction fluid sealing region of at least one gas diffusion layer such that the gas diffusion layer is sealed off to the outside.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: April 30, 2019
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Stefan Haase, Johannes Schmid
  • Publication number: 20190109337
    Abstract: A method for making contact with a plurality of separator plates of a fuel cell system includes the steps of: inserting at least one connecting element of a cell voltage monitoring system between two directly adjacent separator plates so that two connecting parts of the connecting element that are able to move with respect to one another are arranged at least in certain regions between the directly adjacent separator plates; and relatively moving the two connecting parts that are able to move with respect to one another so that at least one first connecting part of the connecting parts moves at least in sections toward a separator plate of the directly adjacent separator plates.
    Type: Application
    Filed: December 5, 2018
    Publication date: April 11, 2019
    Inventors: Marco HAUSRATH, Florian KRIESCH, Stefan HAASE
  • Patent number: 10183592
    Abstract: An exhaust-air guide of a fuel cell stack having a cooling structure, in particular in a motor vehicle, is provided. The cooler structure belongs to the functional environment of the fuel cell stack and is in form through which ambient air flows. The exhaust air of the fuel cell stack is guided to a point upstream of the cooler structure such that the exhaust air flows through the cooler structure in a throughflow direction and, in so doing, entrains ambient air in accordance with the jet pump principle. The exhaust air of the fuel cell stack may be cooled before being guided to the cooler structure. The exhaust air of the fuel cell stack is guided to a point upstream of the cooler structure in multiple pipes that are oriented at least approximately parallel to the inflow surface of the cooler structure, from which pipes the exhaust air emerges via outlet openings in the pipe wall. The outlet openings are situated at a suitable angle with respect to the throughflow direction.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: January 22, 2019
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Stefan Haase, Andreas Buchner, Michael Bauer
  • Publication number: 20180294488
    Abstract: A method for producing a bipolar plate for a fuel cell stack includes the following steps: providing two half-plates made of sheet metal, which form the bipolar plate when arranged on top of one another, wherein the half-plates are profiled via deformation of the sheet metal, and wherein, as a result of the profiling, the two half-plates arranged on top of one another contact at at least one contact region and do not contact at at least one non-contact region; carrying out at least one first cut in the non-contact region of at least one half-plate, before the half-plates are arranged on top of one another; Arranging the two half-plates on top of one another and connecting same; and carrying out at least a second cut in the contact region through both half-plates after they have been arranged on top of one another and connected.
    Type: Application
    Filed: June 15, 2018
    Publication date: October 11, 2018
    Inventor: Stefan HAASE
  • Publication number: 20180294503
    Abstract: A method is provided for producing an energy supply unit for a vehicle having a housing and a stack, realized as a fuel-cell stack, battery stack or capacitor stack, arranged in the housing. The method includes providing the housing, including first and second tie-rod plates and first and second pressure-plate arrangements, wherein each pressure-plate arrangement is fastened to each tie-rod plate, arranging the stack between the two tie-rod plates and between the two pressure-plate arrangements, applying a bracing force to the two pressure-plate arrangements for the purpose of bracing the stack, and fastening at least the first pressure-plate arrangement to both tie-rod plates while the bracing force is being maintained upon the two pressure-plate arrangements. At least one pressure-plate arrangement includes a tolerance compensation system including an end plate securely connected to the tie-rod plates, a contact-pressure plate arranged between the end plate and the stack, and a positioning arrangement.
    Type: Application
    Filed: June 13, 2018
    Publication date: October 11, 2018
    Inventors: Thomas HOEFLER, Paul EITZENBERGER, Martin MOSER, Lukas WITTCHEN, Stefan HAASE
  • Patent number: 10090535
    Abstract: The invention relates to a fuel cell having an anode/cathode stack, which comprises at least one active surface layer, which is designed having a first channel structure having a plurality of first channels for conducting a first fluid in a first direction over the surface layer, which is designed having a second channel structure having a plurality of second channels for conducting a second fluid in a second direction over the surface layer, wherein the second direction extends substantially perpendicularly to the first direction, which is designed having a first feeding structure for feeding the first fluid into the plurality of first channels, and which is designed having a second feeding structure for feeding the second fluid into the plurality of second channels.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: October 2, 2018
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Stefan Haase, Andreas Buchner, Michael Bauer