Patents by Inventor Lennart WITTE

Lennart WITTE 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: 11926329
    Abstract: An evaluation of the speed of movement of a rear wheel of a motor vehicle on the ground, in particular on the inside of a bend, is made exclusively according to the speeds of the front wheels, in situations in which a direct measurement is not possible or in order to accurately evaluate occurrences of wheel lock-up or wheel slip. The invention can be applied to improving the braking setpoints when cornering.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: March 12, 2024
    Assignee: FOUNDATION BRAKES FRANCE
    Inventors: Lennart Witte, Alex Patrão Carqueijò
  • Patent number: 11912255
    Abstract: A vehicle wheel control device is configured to determine a first corrective coefficient of temperature of the motor from a ratio of an angular speed of the motor to the supply intensity of the motor depending on the supply voltage of the motor. The control device is configured to determine a second corrective coefficient of temperature of the motor from a ratio of the ohmic resistance of the motor to the constant of the motor depending on the temperature of the motor.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: February 27, 2024
    Assignee: HITACHI ASTEMO FRANCE S.A.S
    Inventors: Lennart Witte, Alex Patrão Carqueijó
  • Patent number: 11814038
    Abstract: A system for securing the parking of an automobile vehicle parked on a parking area (Z), the vehicle including two steering wheels, and a actuator to modify the orientation of the steering wheels without the action of the driver, the system including a control unit (UC), a system for detecting a parked state of the automobile vehicle, a sensor for detecting the slope of the parking area, sensor for determining the orientation of the steering wheels with respect to the axis of the vehicle, the control unit (UC) being configured to determine the orientation of the steering wheels to put the vehicle in a decreased danger configuration in case of an unwanted movement of the vehicle, and to sending an instruction to the actuator to orientate the steering wheels according to the orientation determined by the control unit (UC).
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: November 14, 2023
    Assignee: FOUNDATION BRAKES FRANCE
    Inventors: Lennart Witte, Aleksander Hurwic
  • Publication number: 20220234564
    Abstract: An electromechanical drum brake comprises two brake segments intended to come into contact with a drum, and at least one actuator configured to apply the segments against the drum, and an electric motor configured to activate the actuator, the actuator comprising at least one member which is movable upon activation of the actuator, the movable member being movable between a braking position and a position beyond a release position, in which the segments are no longer in contact with the drum. The actuator comprises a stop which is arranged only in the actuator and against which the movable element bears when it assumes a position beyond the release position, and the motor powers the actuator until the movable element bears against the stop.
    Type: Application
    Filed: June 3, 2020
    Publication date: July 28, 2022
    Inventors: Lennart Witte, Julien Daclat
  • Publication number: 20220153243
    Abstract: A vehicle wheel control device is configured to determine a first corrective coefficient of temperature of the motor from a ratio of an angular speed of the motor to the supply intensity of the motor depending on the supply voltage of the motor. The control device is configured to determine a second corrective coefficient of temperature of the motor from a ratio of the ohmic resistance of the motor to the constant of the motor depending on the temperature of the motor.
    Type: Application
    Filed: March 2, 2020
    Publication date: May 19, 2022
    Inventors: Lennart Witte, Alex Patrão Carqueijó
  • Publication number: 20220001881
    Abstract: An evaluation of the speed of movement of a rear wheel of a motor vehicle on the ground, in particular on the inside of a bend, is made exclusively according to the speeds of the front wheels, in situations in which a direct measurement is not possible or in order to accurately evaluate occurrences of wheel lock-up or wheel slip. The invention can be applied to improving the braking setpoints when cornering.
    Type: Application
    Filed: November 8, 2019
    Publication date: January 6, 2022
    Inventors: Lennart Witte, Alex Patrão Carqueijò
  • Publication number: 20210001836
    Abstract: A system for securing the parking of an automobile vehicle parked on a parking area (Z), the vehicle including two steering wheels, and a actuator to modify the orientation of the steering wheels without the action of the driver, the system including a control unit (UC), a system for detecting a parked state of the automobile vehicle, a sensor for detecting the slope of the parking area, sensor for determining the orientation of the steering wheels with respect to the axis of the vehicle, the control unit (UC) being configured to determine the orientation of the steering wheels to put the vehicle in a decreased danger configuration in case of an unwanted movement of the vehicle, and to sending an instruction to the actuator to orientate the steering wheels according to the orientation determined by the control unit (UC).
    Type: Application
    Filed: November 8, 2018
    Publication date: January 7, 2021
    Inventors: Lennart Witte, Aleksander Hurwic
  • Publication number: 20200269824
    Abstract: A control system for controlling an electric parking brake system of a motor vehicle having at least two brakes designed to be mounted near wheels of the motor vehicle, each brake comprising a parking brake actuator actuated by an electric motor; the control system comprises a control unit (UC) for controlling electric motors, such that, when an instruction to apply the parking brake is issued, the electric motors are supplied with power in order to actuate the actuator and allow application of the brakes.
    Type: Application
    Filed: November 8, 2018
    Publication date: August 27, 2020
    Inventor: Lennart Witte
  • Patent number: 10737675
    Abstract: Disclosed is a method for controlling a braking system for a motor vehicle, capable of implementing a parking brake function. The system includes a disk, a brake caliper and at least one piston to exert a disk clamping force on the disk, the braking system further including an electric drive unit moving the piston relative to the caliper and a hydraulic drive unit moving the piston relative to the caliper. The method includes at least one step of exerting a disk clamping force by moving the piston, by the electric drive unit and/or the hydraulic drive unit. The method includes a step of actuating the hydraulic unit by exerting a first clamping power on the piston, followed by a step of actuating the electric unit by exerting an additional clamping power, until a total power is obtained that is high enough to lock the disk.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: August 11, 2020
    Assignee: FOUNDATION BRAKES FRANCE
    Inventors: Lennart Witte, Benoit Ghesquiere, Aleksander Hurwic
  • Publication number: 20180370512
    Abstract: Disclosed is a method for controlling a braking system for a motor vehicle, capable of implementing a parking brake function. The system includes a disk, a brake caliper and at least one piston to exert a disk clamping force on the disk, the braking system further including an electric drive unit moving the piston relative to the caliper and a hydraulic drive unit moving the piston relative to the caliper. The method includes at least one step of exerting a disk clamping force by moving the piston, by the electric drive unit and/or the hydraulic drive unit. The method includes a step of actuating the hydraulic unit by exerting a first clamping power on the piston, followed by a step of actuating the electric unit by exerting an additional clamping power, until a total power is obtained that is high enough to lock the disk.
    Type: Application
    Filed: December 14, 2016
    Publication date: December 27, 2018
    Inventors: Lennart WITTE, Benoit GHESQUIERE, Aleksander HURWIC