Patents by Inventor Stefan Zahariev

Stefan Zahariev 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: 12084027
    Abstract: A method for controlling an electronically slip-controllable power braking system and a braking system. This power braking system has a brake circuit and a pressure generator including a plunger piston for applying a circuit pressure to the brake circuit. The plunger piston delimits a pressure chamber of the pressure generator and is drivable by an activatable drive unit into a forward or reverse movement. During its forward movement, pressure medium is displaced by the plunger piston out of the pressure chamber into the brake circuit, while during the reverse movement, pressure medium flows out of a reservoir of the power braking system via a flow path into the pressure chamber of the pressure generator. The speed of the reverse movement of the plunger piston is adapted by the electronic control unit so that cavitation at the pressure generator of the power braking system, is avoided or at least minimized.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: September 10, 2024
    Assignee: ROBERT BOSCH GMBH
    Inventors: Jens Wagner, Bertram Foitzik, Stefan Zahariev
  • Patent number: 11851043
    Abstract: A method for determining a start time for a recharging procedure for a plunger device of an electronically slip-controllable power brake system, and an electronically slip-controllable power brake system having a plunger device. Plunger devices have a plunger cylinder, a plunger piston, and a plunger working space and are operable by a drive motor. A recharging procedure of the plunger device is required from time to time. The start time for a recharging procedure of the plunger device is ascertained as a function of characteristic values that describe the driving state of a vehicle equipped with the power brake system, and/or the operating state of the plunger device when an actual position of the plunger piston lies within a specifiable working range of the plunger device.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: December 26, 2023
    Assignee: ROBERT BOSCH GMBH
    Inventors: Stefan Zahariev, Bertram Foitzik, Jens Wagner
  • Patent number: 11767001
    Abstract: A method for operating a brake system. A brake request signal is generated, and a setpoint brake pressure required in an active circuit is ascertained. An actual brake pressure is set according to the setpoint brake pressure. A wheel brake actuated by the active circuit is hydraulically decoupled from the pressure generation device by closing an isolation valve, which is situated between the pressure generation device and the wheel brake, the isolation valve is preloaded to a closed state counter to an inflow direction of a volume flow into a brake-side section between the isolation valve and the wheel brake. A hydraulic recoupling of the wheel brake takes place by opening the isolation valve in that the actual brake pressure is set according to the setpoint brake pressure and an opening force is simultaneously applied to the isolation valve such that a compensation of a closing force takes place.
    Type: Grant
    Filed: May 25, 2019
    Date of Patent: September 26, 2023
    Assignee: ROBERT BOSCH GMBH
    Inventors: Andreas Krautter, Bertram Foitzik, Daniel Frank, Dirk Foerch, Jens Wagner, Stefan Zahariev, Timo Haible, Verena Barske
  • Patent number: 11498542
    Abstract: A method for operating a brake system of a vehicle in a maintenance mode and in a normal mode includes providing a brake pressure in the brake system in the normal mode using a brake pressure generator. The method further includes preventing a provision of a brake pressure by the brake pressure generator in the maintenance mode.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: November 15, 2022
    Assignee: Robert Bosch GmbH
    Inventors: Christian Michael Praetorius, Verena Friedrich, Alexander Horvath, Markus Hoffmann, Markus Bartel, Nikolai Mueller, Stefan Bachmayer, Stefan Zahariev
  • Publication number: 20210316703
    Abstract: A method for determining a start time for a recharging procedure for a plunger device of an electronically slip-controllable power brake system, and an electronically slip-controllable power brake system having a plunger device. Plunger devices have a plunger cylinder, a plunger piston, and a plunger working space and are operable by a drive motor. A recharging procedure of the plunger device is required from time to time. The start time for a recharging procedure of the plunger device is ascertained as a function of characteristic values that describe the driving state of a vehicle equipped with the power brake system, and/or the operating state of the plunger device when an actual position of the plunger piston lies within a specifiable working range of the plunger device.
    Type: Application
    Filed: July 11, 2019
    Publication date: October 14, 2021
    Inventors: Stefan Zahariev, Bertram Foitzik, Jens Wagner
  • Publication number: 20210269004
    Abstract: A method for operating a brake system. A brake request signal is generated, and a setpoint brake pressure required in an active circuit is ascertained. An actual brake pressure is set according to the setpoint brake pressure. A wheel brake actuated by the active circuit is hydraulically decoupled from the pressure generation device by closing an isolation valve, which is situated between the pressure generation device and the wheel brake, the isolation valve is preloaded to a closed state counter to an inflow direction of a volume flow into a brake-side section between the isolation valve and the wheel brake. A hydraulic recoupling of the wheel brake takes place by opening the isolation valve in that the actual brake pressure is set according to the setpoint brake pressure and an opening force is simultaneously applied to the isolation valve such that a compensation of a closing force takes place.
    Type: Application
    Filed: May 25, 2019
    Publication date: September 2, 2021
    Inventors: Andreas Krautter, Bertram Foitzik, Daniel Frank, Dirk Foerch, Jens Wagner, Stefan Zahariev, Timo Haible, Verena Barske
  • Patent number: 10875510
    Abstract: A method for controlling an electronically slip-controllable power braking system of a motor vehicle. Power braking systems are equipped with a plunger unit, which includes a plunger piston accommodated in a plunger cylinder and delimiting a working chamber, for generating brake pressure in brake circuits. This plunger piston is actuatable by an electronically activatable drive in a pressure buildup direction or in the opposing spatial direction thereto in a pressure reducing direction. A time-limited drive of the plunger piston takes place in the pressure reducing direction as soon as an actual brake pressure generated by the plunger unit has reached a predefinable setpoint brake pressure and a decoupling of a wheel brake and the plunger unit from an associated brake circuit has taken place.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: December 29, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Jens Wagner, Matthias Kranich, Nicholas Taubitz, Reid Collins, Stefan Zahariev, Alfred Strehle
  • Publication number: 20200047728
    Abstract: A method for controlling an electronically slip-controllable power braking system and a braking system. This power braking system has a brake circuit and a pressure generator including a plunger piston for applying a circuit pressure to the brake circuit. The plunger piston delimits a pressure chamber of the pressure generator and is drivable by an activatable drive unit into a forward or reverse movement. During its forward movement, pressure medium is displaced by the plunger piston out of the pressure chamber into the brake circuit, while during the reverse movement, pressure medium flows out of a reservoir of the power braking system via a flow path into the pressure chamber of the pressure generator. The speed of the reverse movement of the plunger piston is adapted by the electronic control unit so that cavitation at the pressure generator of the power braking system, is avoided or at least minimized.
    Type: Application
    Filed: July 25, 2019
    Publication date: February 13, 2020
    Inventors: Jens Wagner, Bertram Foitzik, Stefan Zahariev
  • Publication number: 20200031329
    Abstract: A method for operating a brake system of a vehicle in a maintenance mode and in a normal mode includes providing a brake pressure in the brake system in the normal mode using a brake pressure generator. The method further includes preventing a provision of a brake pressure by the brake pressure generator in the maintenance mode.
    Type: Application
    Filed: July 30, 2019
    Publication date: January 30, 2020
    Inventors: Christian Michael Praetorius, Verena Friedrich, Alexander Horvath, Markus Hoffmann, Markus Bartel, Nikolai Mueller, Stefan Bachmayer, Stefan Zahariev
  • Publication number: 20190359191
    Abstract: A method for controlling an electronically slip-controllable power braking system of a motor vehicle. Power braking systems are equipped with a plunger unit, which includes a plunger piston accommodated in a plunger cylinder and delimiting a working chamber, for generating brake pressure in brake circuits. This plunger piston is actuatable by an electronically activatable drive in a pressure buildup direction or in the opposing spatial direction thereto in a pressure reducing direction. A time-limited drive of the plunger piston takes place in the pressure reducing direction as soon as an actual brake pressure generated by the plunger unit has reached a predefinable setpoint brake pressure and a decoupling of a wheel brake and the plunger unit from an associated brake circuit has taken place.
    Type: Application
    Filed: April 24, 2019
    Publication date: November 28, 2019
    Inventors: Jens Wagner, Matthias Kranich, Nicholas Taubitz, Reid Collins, Stefan Zahariev, Alfred Strehle
  • Patent number: 10457259
    Abstract: A control device and a method for operating a hydraulic braking system of a vehicle, a volume supplementation in a motorized plunger device being effectuatable by moving a plunger of the motorized plunger device at a maximum movement speed by a maximum movement travel in a pressure reduction direction, at least one setpoint variable regarding the maximum movement speed and/or the maximum movement travel of the plunger during the subsequent volume supplementation being established, before the volume supplementation, with consideration of at least one provided variable regarding current driving situation information and/or surroundings information, and the motor of the motorized plunger device is activated during the subsequent volume supplementation with consideration of the at least one established setpoint variable.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: October 29, 2019
    Assignee: Robert Bosch Gmbh
    Inventors: Jens Wagner, Stefan Zahariev
  • Publication number: 20190023246
    Abstract: A control device and a method for operating a hydraulic braking system of a vehicle, a volume supplementation in a motorized plunger device being effectuatable by moving a plunger of the motorized plunger device at a maximum movement speed by a maximum movement travel in a pressure reduction direction, at least one setpoint variable regarding the maximum movement speed and/or the maximum movement travel of the plunger during the subsequent volume supplementation being established, before the volume supplementation, with consideration of at least one provided variable regarding current driving situation information and/or surroundings information, and the motor of the motorized plunger device is activated during the subsequent volume supplementation with consideration of the at least one established setpoint variable.
    Type: Application
    Filed: July 16, 2018
    Publication date: January 24, 2019
    Inventors: Jens Wagner, Stefan Zahariev