Patents by Inventor Johannes Maria SCHÄFER

Johannes Maria SCHÄFER 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).

  • Patent number: 11597437
    Abstract: A method for operating a steering system of a vehicle, wherein an actuator is provided for generating a moment at a steering handle of the vehicle, wherein the following steps are carried out: generating the moment up to a maximum moment if the maximum moment is enabled, and up to a lower limited moment if the maximum moment is limited, identifying a vehicle situation of the vehicle, enabling the maximum moment if the vehicle situation is identified as being a boarding and/or deboarding situation in order to brace the steering handle, and limiting the maximum moment if the vehicle situation is identified as being driving operation of the vehicle.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: March 7, 2023
    Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventors: Johannes Maria Schäfer, Björn Makkus, Dirk Dreyer, Andreas Pöhland
  • Patent number: 11299194
    Abstract: The invention relates to a steer-by-wire system, that includes a steering mechanism, a sensor for detecting a driver request, a steering control device, power electronics, an electric servomotor, a steering rack that can be moved by the servomotor and an actor for generating a feedback torque (MFF) at the steering mechanism as a function of a steering rack position, wherein the steering control unit is configured in such a way so as to subtract, based on the feedback torque (MFF), at least a portion from a driver request determined based on sensor data, and a method for operating a steer-by-wire system.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: April 12, 2022
    Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventor: Johannes Maria Schäfer
  • Publication number: 20220048563
    Abstract: Technologies and techniques for determining a gear rack force of a steer-by-wire steering system that includes a steering handle, for specifying a steering angle as a function of a steering handle position. A vehicle wheel actuator is configured to set the steering angle by movement of a gear rack of the steering system, by applying an actuating force, the gear rack being coupled to at least one vehicle wheel. A reaction force actuator may produce a reaction force on the steering handle in accordance with a gear rack force. Friction operation is determined, in which gear rack movement does not occur when the steering handle position is changed, and, if friction operation is present, the gear rack force is determined on the basis of the actuating force of the vehicle wheel actuator.
    Type: Application
    Filed: September 5, 2019
    Publication date: February 17, 2022
    Inventor: Johannes Maria Schäfer
  • Patent number: 11247725
    Abstract: A steering controller is disclosed, wherein the steering controller is configured in such a way as to obtain input signals from at least one sensor for detecting a steering request of a motor vehicle driver and at least one driver assistance system, wherein the steering controller is also configured to generate an actuating signal for a power electronics unit. The actuating signal is assembled from two components, wherein the steering controller is configured so that the first component is ascertained from the input signal from the at least one sensor. The signals from the driver assistance system have no influence on the first component. The second component is ascertained from the input signals from the at least one driver assistance system, wherein the signals from the sensor are taken into account in the second component.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: February 15, 2022
    Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventor: Johannes Maria Schäfer
  • Patent number: 10913492
    Abstract: A steer-by-wire steering system having a steering control, a rotation angle sensor for detecting a position of the steering control, an actuator for producing a counter-torque on the steering control, a steering actuator for adjusting a steering angle depending on the data of the rotation angle sensor on a final control element, wherein the final control element has a mechanical end stop and the actuator implements a software end stop on the steering control, wherein a transmission ratio is set between the rotation angle on the steering control and the steering angle, wherein a positive delta value and a negative delta value are defined for the set transmission ratio, wherein the steer-by-wire steering system is embodied so the adjusted transmission ratio is selected so that a remaining position error of the steering control is minimized.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: February 9, 2021
    Inventors: Sebastian Kilz, Björn Makkus, Johannes Maria Schäfer
  • Publication number: 20200385055
    Abstract: A method for operating a steering system of a vehicle, wherein an actuator is provided for generating a moment at a steering handle of the vehicle, wherein the following steps are carried out: generating the moment up to a maximum moment if the maximum moment is enabled, and up to a lower limited moment if the maximum moment is limited, identifying a vehicle situation of the vehicle, enabling the maximum moment if the vehicle situation is identified as being a boarding and/or deboarding situation in order to brace the steering handle, and limiting the maximum moment if the vehicle situation is identified as being driving operation of the vehicle.
    Type: Application
    Filed: June 3, 2020
    Publication date: December 10, 2020
    Applicant: Volkswagen Aktiengesellschaft
    Inventors: Johannes Maria Schäfer, Björn Makkus, Dirk Dreyer, Andreas Pöhland
  • Patent number: 10836422
    Abstract: A method for operating an electric power steering system of a motor vehicle, wherein a steering wheel angle is specified by a steering handle as a measurement for a desired wheel steering angle for at least one steerable wheel of the motor vehicle, wherein an electric servo drive having an electric motor provides steering assistance, and wherein an additional restoring force is provided to compensate for increased internal friction in the power steering system based upon temperature, wherein the additional restoring force is reduced based upon a desired steering direction that is detected at the steering handle. Also disclosed is an associated electric power steering system, an associated computer program, and an associated control unit.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: November 17, 2020
    Assignee: Volkswagen AG
    Inventors: Jens Zientek, Johannes Maria Schäfer
  • Publication number: 20200346686
    Abstract: The invention relates to a steer-by-wire system, that includes a steering mechanism, a sensor for detecting a driver request, a steering control device, power electronics, an electric servomotor, a steering rack that can be moved by the servomotor and an actor for generating a feedback torque (MFF) at the steering mechanism as a function of a steering rack position, wherein the steering control unit is configured in such a way so as to subtract, based on the feedback torque (MFF), at least a portion from a driver request determined based on sensor data, and a method for operating a steer-by-wire system.
    Type: Application
    Filed: July 5, 2018
    Publication date: November 5, 2020
    Inventor: Johannes Maria Schäfer
  • Publication number: 20200189660
    Abstract: The invention relates to a steering controller, wherein the steering controller is configured in such a way as to obtain input signals from at least one sensor for detecting a steering request of a motor vehicle driver and at least one driver assistance system, wherein the steering controller is also configured to generate an actuating signal for a power electronics unit, wherein the actuating signal is assembled from two components, wherein the steering controller is configured in such a way that the first component is ascertained from the input signal from the at least one sensor, wherein the signals from the driver assistance system have no influence on the first component, and the second component is ascertained from the input signals from the at least one driver assistance system, wherein the signals from the sensor are taken into account in the second component; and to a method for ascertaining an actuating signal for a power electronics unit of a steering apparatus of a motor vehicle.
    Type: Application
    Filed: July 10, 2018
    Publication date: June 18, 2020
    Applicant: Volkswagen Aktiengesellschaft
    Inventor: Johannes Maria Schäfer
  • Publication number: 20180304923
    Abstract: A steer-by-wire steering system having a steering control, a rotation angle sensor for detecting a position of the steering control, an actuator for producing a counter-torque on the steering control, a steering actuator for adjusting a steering angle depending on the data of the rotation angle sensor on a final control element, wherein the final control element has a mechanical end stop and the actuator implements a software end stop on the steering control, wherein a transmission ratio is set between the rotation angle on the steering control and the steering angle, wherein a positive delta value and a negative delta value are defined for the set transmission ratio, wherein the steer-by-wire steering system is embodied so the adjusted transmission ratio is selected so that a remaining position error of the steering control is minimized.
    Type: Application
    Filed: April 13, 2018
    Publication date: October 25, 2018
    Inventors: Sebastian KILZ, Björn MAKKUS, Johannes Maria SCHÄFER
  • Publication number: 20180057042
    Abstract: A method for operating an electric power steering system of a motor vehicle, wherein a steering wheel angle is specified by a steering handle as a measurement for a desired wheel steering angle for at least one steerable wheel of the motor vehicle, wherein an electric servo drive having an electric motor provides steering assistance, and wherein an additional restoring force is provided to compensate for increased internal friction in the power steering system based upon temperature, wherein the additional restoring force is reduced based upon a desired steering direction that is detected at the steering handle. Also disclosed is an associated electric power steering system, an associated computer program, and an associated control unit.
    Type: Application
    Filed: August 29, 2017
    Publication date: March 1, 2018
    Inventors: Jens ZIENTEK, Johannes Maria SCHÄFER