Patents by Inventor Dirk Schroeder

Dirk Schroeder 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: 20230028559
    Abstract: A process can be used for preparing sodium and potassium alkoxides. The process is characterized by two simultaneously implemented but spatially separated reactions of an alcohol ROH with NaOH, and ROH with KOH, to give sodium alkoxide and potassium alkoxide, respectively. The vapours formed in this case contain the alcohol used and water. The vapours are combined, and the resulting mixed vapour is fed to a common distillation with recovery of the alcohol.
    Type: Application
    Filed: November 30, 2020
    Publication date: January 26, 2023
    Applicant: Evonik Functional Solutions GmbH
    Inventors: Dirk Roettger, Sebastian Reimann, Manfred Neumann, Moritz Schröder, Philip Zitzewitz, Niklas Paul, Armin Matthias Rix
  • Publication number: 20220410665
    Abstract: A reheating process for operating a cooling system having a heat pump function for a motor vehicle. The reheating process includes steps of determining a heat differential value by comparing a heat emission actual value at the heating register to a heat emission target value, and adjusting at least one operating setting of the cooling system, so that the power consumption in the cooling system is increased if the heat differential value is greater than 0 and less than a heat differential threshold value.
    Type: Application
    Filed: September 28, 2020
    Publication date: December 29, 2022
    Applicant: AUDI AG
    Inventors: Dirk SCHROEDER, Christian REBINGER, Marco WILL, Simon BOGNER
  • Publication number: 20220382712
    Abstract: Computer-readable media, methods, and systems are disclosed for minimizing data volume growth in a database system under changes to an encryption status of a plurality of data pages persisted to a database. Initially, a request is received to update an encryption parameter associated with the database. Next, it is determined whether a candidate page requires encryption changes. In response to determining that the candidate page is not currently in use by one or more active database snapshots and not currently loaded in main memory, the candidate page is loaded into main memory. Next, an encryption operation is performed on the candidate page, and the encrypted page is designated for persistence. Finally, based on a current number of candidate pages already encrypted during a current save point cycle, the selective iteration is paused until a subsequent save point cycle.
    Type: Application
    Filed: May 28, 2021
    Publication date: December 1, 2022
    Inventors: Dirk Thomsen, Axel Schroeder
  • Publication number: 20220340509
    Abstract: A process produces sodium and/or potassium alkoxides in countercurrent by reactive rectification. Alcohol is reacted in countercurrent with the respective alkali metal hydroxide. The vapours containing alcohol and water are separated in at least two serially arranged rectification columns. The energy of the vapour obtained in the second rectification is utilized for operating the first rectification. This specific energy integration coupled with establishing a certain pressure difference in the two rectification stages makes it possible to cover a particularly large proportion of the energy required for the rectification through heating steam and minimizes the use of electricity.
    Type: Application
    Filed: April 13, 2022
    Publication date: October 27, 2022
    Applicant: Evonik Functional Solutions GmbH
    Inventors: Dirk Roettger, Sebastian Reimann, Niklas Paul, Armin Matthias Rix, Moritz Schröder, Philip Zitzewitz
  • Publication number: 20220340508
    Abstract: A process produces sodium and/or potassium alkoxides in countercurrent by reactive rectification. Alcohol is reacted in countercurrent with the respective alkali metal hydroxide. The vapours containing alcohol and water are separated into at least two serially arranged rectification columns. The energy of the vapour obtained in the first rectification is utilized for operating the second rectification. This specific energy integration coupled with establishing a certain pressure difference in the two rectification stages makes it possible to cover a particularly large proportion of the energy required for the rectification through electricity and to save heating steam.
    Type: Application
    Filed: April 13, 2022
    Publication date: October 27, 2022
    Applicant: Evonik Functional Solutions GmbH
    Inventors: Dirk Roettger, Sebastian Reimann, Armin Matthias Rix, Niklas Paul, Moritz Schröder, Philip Zitzewitz
  • Publication number: 20220324296
    Abstract: A method for operating a coolant circuit of a refrigeration system of a vehicle having multiple system sections. A single pressure sensor is located in each system section. A temperature sensor is arranged downstream at each component to be balanced in the system sections, such as heat exchangers and a coolant compressor. The sensor signals of the pressure and temperature sensors are supplied to a control unit for the control or regulation of the refrigeration system. Furthermore, a pressure approximation value at the position of the temperature sensor is calculated by a pressure loss value determined using a pressure loss calculation function starting from the position of the pressure sensor arranged in the system section of the component up to the position of the temperature sensor if the temperature sensor and the pressure sensor are arranged at different positions in the system section.
    Type: Application
    Filed: February 19, 2020
    Publication date: October 13, 2022
    Applicant: AUDI AG
    Inventors: Dirk SCHROEDER, Christian REBINGER, Helmut ROTTENKOLBER
  • Publication number: 20220297504
    Abstract: A modular cooling system for a vehicle including a base module having a refrigerant compressor, a high-pressure section having a direct or indirect condenser or gas cooler, and a low-pressure section having an evaporator and a chiller having chiller expansion elements connected upstream. The low-pressure section is connected via a heat pump expansion element to the high-pressure section. A first supplementary module has a heating branch having a heat pump heat exchanger, which is connectable via a first reheating branch having a valve element to the direct or indirect condenser or gas cooler, and a heat pump recirculation branch having a blockable valve element for connecting the direct or indirect condenser or gas cooler to the low-pressure section.
    Type: Application
    Filed: September 22, 2020
    Publication date: September 22, 2022
    Applicant: AUDI AG
    Inventors: Dirk SCHROEDER, Christian REBINGER, Helmut ROTTENKOLBER
  • Patent number: 11382808
    Abstract: A wheelchair having a chassis on which the following are arranged, opposite one another: at least one drive unit comprising a drive wheel and an electric drive system, a front wheel positioned on a front swivel arm, and a rear wheel. The drive unit and front swivel arm are arranged so as to pivot relative to the chassis in a vertical plane, and are coupled to one another by a first coupling and a second coupling member.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: July 12, 2022
    Assignee: OTTO BOCK MOBILITY SOLUTIONS GMBH
    Inventors: Julia Schroeder, Dirk Moeller, Sascha Hohendorn, Jens Dittmar, Johannes Koenig
  • Patent number: 11364770
    Abstract: A refrigeration system for a vehicle including a refrigerant circuit having a double-flow heat exchanger, it being possible to operate the heat exchanger as a refrigerant condenser/gas cooler for an AC mode or as an air heat pump evaporator for a heat pump mode. The first flow of the heat exchanger has a first refrigerant connection and the second flow of the heat exchanger has a second refrigerant connection. For double flow through the heat exchanger in AC mode the first refrigerant connection is a refrigerant inlet and the second refrigerant connection is a refrigerant outlet. For single flow through the heat exchanger in heat pump mode the second refrigerant connection is a refrigerant inlet.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: June 21, 2022
    Assignee: AUDI AG
    Inventors: Dirk Schroeder, Christian Rebinger, Helmut Rottenkolber
  • Patent number: 11325446
    Abstract: A method for operating a refrigeration system for a vehicle with a refrigerant circuit including a heat exchanger. A controllable environmental air flow (L) is flowed through the heat exchanger and the heat exchanger can be operated as a refrigerant condenser or a gas cooler for a refrigeration system operation.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: May 10, 2022
    Assignee: AUDI AG
    Inventors: Dirk Schroeder, Helmut Rottenkolber
  • Patent number: 11279205
    Abstract: A method for operating a coolant circuit of a vehicle cooling system in an AC mode and in a heating mode, implemented by a heat pump function, having an evaporator branch including an evaporator and a first expansion element, a coolant compressor, an AC and heat pump branch, having an outer condenser or gas cooler, as a heat pump evaporator having a second expansion element. The AC and heat pump branch is connected to the coolant compressor via a first blocking element and to the evaporator branch via the second expansion element, a heating branch having an inner heating condenser or heating gas cooler and a second blocking element, connected downstream thereto.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: March 22, 2022
    Assignee: AUDI AG
    Inventors: Dirk Schroeder, Christian Rebinger
  • Patent number: 11197119
    Abstract: This disclosure relates to techniques for generating physically accurate auralization of sound propagation in complex environments, while accounting for important wave effects, such as sound absorption, sound scattering, and airborne sound insulation between rooms. According to some embodiments, techniques may be utilized to determine more accurate, e.g., “acoustically-effective” room volumes that account for open windows, open doors, acoustic dead space, and the like. According to other embodiments disclosed herein, techniques may be utilized to perform optimized hybrid acoustical ray tracing, including grouping coherent rays by processing core.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: December 7, 2021
    Assignee: Apple Inc.
    Inventors: Dirk Schroeder, Soenke Pelzer
  • Patent number: 11172320
    Abstract: This disclosure relates to techniques for generating physically accurate auralization of sound propagation in complex environments, while accounting for important wave effects, such as sound absorption, sound scattering, and airborne sound insulation between rooms. According to some embodiments, techniques may be utilized to determine more accurate, e.g., “acoustically-effective” room volumes that account for open windows, open doors, acoustic dead space, and the like. According to other embodiments disclosed herein, techniques may be utilized to perform optimized hybrid acoustical ray tracing, including grouping coherent rays by processing core.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: November 9, 2021
    Assignee: Apple Inc.
    Inventors: Soenke Pelzer, Dirk Schroeder
  • Patent number: 11170139
    Abstract: This disclosure relates to techniques for generating physically accurate auralization of sound propagation in complex environments, while accounting for important wave effects, such as sound absorption, sound scattering, and airborne sound insulation between rooms. According to some embodiments, techniques may be utilized to determine more accurate, e.g., “acoustically-effective” room volumes that account for open windows, open doors, acoustic dead space, and the like. According to other embodiments disclosed herein, techniques may be utilized to perform optimized hybrid acoustical ray tracing, including grouping coherent rays by processing core.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: November 9, 2021
    Assignee: Apple Inc.
    Inventors: Dirk Schroeder, Soenke Pelzer
  • Publication number: 20210329405
    Abstract: Processing sound in an enhanced reality environment can include generating, based on an image of a physical environment, an acoustic model of the physical environment. Audio signals captured by a microphone array, can capture a sound in the physical environment. Based on these audio signals, one or more measured acoustic parameters of the physical environment can be generated. A target audio signal can be processed using the model of the physical environment and the measured acoustic parameters, resulting in a plurality of output audio channels having a virtual sound source with a virtual location. The output audio channels can be used to drive a plurality of speakers. Other aspects are also described and claimed.
    Type: Application
    Filed: June 28, 2021
    Publication date: October 21, 2021
    Inventors: Christopher T. Eubank, Joshua D. Atkins, Soenke Pelzer, Dirk Schroeder
  • Publication number: 20210329381
    Abstract: An audio device can sense sound in a physical environment using a plurality of microphones to generate a plurality of microphone signals. Clean speech can be extracted from microphone signals. Ambience can be extracted from the microphone signals. The clean speech can be encoded at a first compression level. The ambience can be encoded at a second compression level that is higher than the first compression level. Other aspects are also described and claimed.
    Type: Application
    Filed: June 28, 2021
    Publication date: October 21, 2021
    Inventors: Tomlinson Holman, Christopher T. Eubank, Joshua D. Atkins, Soenke Pelzer, Dirk Schroeder
  • Publication number: 20210268868
    Abstract: A method for operating a refrigeration system for a vehicle, which refrigeration system includes a refrigerant circuit having a heat pump function. The refrigerant circuit has an exterior heat exchanger, which is operated as a condenser or gas cooler in order to perform a refrigeration system mode or as a heat pump evaporator in order to carry out a heat pump mode. The refrigerant circuit has an interior heating condenser or heating gas cooler for carrying out a heating mode. The interior heating condenser or heating gas cooler is fluidically connected to the exterior heat exchanger, downstream, by a post-heating expansion device in order to carry out a post-heating mode. The opening cross-section of the post-heating expansion device is controlled in accordance with a refrigeration system parameter indicating the required post-heating power.
    Type: Application
    Filed: August 2, 2019
    Publication date: September 2, 2021
    Applicant: AUDI AG
    Inventors: Dirk SCHROEDER, Christian REBINGER, Helmut ROTTENKOLBER
  • Patent number: 11104204
    Abstract: A method for operating a cooling circuit. It is provided that a) the actuation signal ST of the coolant compressor is provided so as to increase over time from a minimum value (STmin) in order to generate a start-up phase of the coolant compressor, b) a control signal maximum value (STmax) and a control signal threshold (STSW) are provided, where STSW<STmax, c) the actuation signal (ST) is limited to the control signal maximum value (STmax) if the actuation signal (ST) reaches the control signal threshold (STSW) and the measured high and/or low-pressure value (PHD, PND) satisfies a condition.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: August 31, 2021
    Assignee: AUDI AG
    Inventors: Dirk Schroeder, Christian Rebinger, Helmut Rottenkolber, Jan Wack
  • Patent number: 11070933
    Abstract: A computer system having an electronic device determines a listener position within a computer-generated reality (CGR) setting that is to be aurally experienced by a user of the electronic device through at least one speaker. The system determines a source position of a virtual sound source within the CGR setting and determines a characteristic of a virtual object within the CGR setting, where the characteristic include a geometry of an edge of the virtual object. The system determines at least one edge-diffraction filter parameter for an edge-diffraction filter based on 1) the listener position, 2) the source position, and 3) the geometry. The system applies the edge-diffraction filter to an input audio signal to produce a filtered audio signal that accounts for edge-diffraction of sound produced by the virtual sound source within the CGR setting.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: July 20, 2021
    Assignee: APPLE INC.
    Inventors: Dirk Schroeder, Jonathan D. Sheaffer, Soenke Pelzer, Juha O. Merimaa
  • Publication number: 20210148616
    Abstract: A refrigeration system for a vehicle including a refrigerant circuit having a double-flow heat exchanger, it being possible to operate the heat exchanger as a refrigerant condenser/gas cooler for an AC mode or as an air heat pump evaporator for a heat pump mode. The first flow of the heat exchanger has a first refrigerant connection and the second flow of the heat exchanger has a second refrigerant connection. For double flow through the heat exchanger in AC mode the first refrigerant connection is a refrigerant inlet and the second refrigerant connection is a refrigerant outlet. For single flow through the heat exchanger in heat pump mode the second refrigerant connection is a refrigerant inlet.
    Type: Application
    Filed: March 5, 2018
    Publication date: May 20, 2021
    Applicant: AUDI AG
    Inventors: Dirk SCHROEDER, Christian REBINGER, Helmut ROTTENKOLBER