Patents by Inventor Heinrich Plewnia

Heinrich Plewnia 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: 20210053546
    Abstract: The present disclosure relates to a method for testing a brake fluid sensor of a vehicle braking system, wherein the brake fluid sensor can indicate the fluid level in the fluid reservoir, wherein the method has the following steps: (1) Altering the fluid level in at least one region of the at least one fluid reservoir by means of at least one braking force generating device; and (2) Detecting whether the at least one brake fluid sensor emits a signal indicating the modified fluid level in the at least one region of the at least one fluid reservoir.
    Type: Application
    Filed: August 19, 2020
    Publication date: February 25, 2021
    Applicant: ZF Active Safety GmbH
    Inventor: Heinrich Plewnia
  • Publication number: 20200207321
    Abstract: A method for operating a hydraulic motor vehicle brake system, in the event of a malfunction of the second functional unit includes the steps of generating a hydraulic pressure by means of the first hydraulic pressure generator and controlling at least one of the first valve assembly and the second valve assembly in such a way that a lower hydraulic pressure is established at the rear wheel brakes than at the front wheel brakes. The vehicle brake system includes a first functional unit, a second functional unit, and a control system. The first functional unit includes at least one first hydraulic pressure generator, a first valve assembly, and a second valve assembly, which is arranged between the first hydraulic pressure generator and the rear wheel brakes. The second functional unit includes at least one second, electric hydraulic pressure and a third valve assembly.
    Type: Application
    Filed: December 16, 2019
    Publication date: July 2, 2020
    Applicant: ZF Active Safety GmbH
    Inventor: Heinrich Plewnia
  • Publication number: 20200207320
    Abstract: A brake system includes a first functional unit having at least one first hydraulic pressure generator, which is designed to build up a hydraulic pressure at a wheel brake, and a first hydraulic fluid reservoir, from which the first hydraulic pressure generator can draw in hydraulic fluid. The brake system furthermore comprises a second functional unit having at least one second, electric hydraulic pressure generator, which is controllable in order to build up a hydraulic pressure at the wheel brake, a check valve and at least one second hydraulic fluid reservoir, having an outlet, via which the second, electric hydraulic pressure generator can draw in hydraulic fluid, and an inlet, relative to which the check valve is arranged upstream in such a way that it has a blocking effect toward the inlet in respect of a flow direction.
    Type: Application
    Filed: December 16, 2019
    Publication date: July 2, 2020
    Applicant: ZF Active Safety GmbH
    Inventor: Heinrich Plewnia
  • Publication number: 20200070797
    Abstract: A hydraulic brake system for a motor vehicle with redundant braking pressure regulation is presented. The brake system comprises a first functional unit having at least one first electrical braking pressure generator which is designed to generate a braking pressure at each of a plurality of wheel brakes, and further having a valve assembly per wheel brake. The valve assembly can be actuated for braking pressure regulation at the corresponding wheel brake in order to couple a first wheel brake associated with the valve assembly either to the first braking pressure generator or to an unpressurized reservoir for hydraulic fluid. The brake system also comprises a second functional unit having at least one second electrical braking pressure generator which is designed to generate a braking pressure at each of a subset of the wheel brakes.
    Type: Application
    Filed: January 19, 2018
    Publication date: March 5, 2020
    Inventors: Heinrich Plewnia, Nicholas Alford
  • Patent number: 8419383
    Abstract: A piston pump housing for a hydraulic pressure generator in a vehicle brake system includes a housing, in which a bore for receiving an eccentric shaft is formed. In the housing at least six cylinders for receiving one pump piston each are further provided. The cylinders are disposed in pairs in three or more mutually spaced-apart planes and open out in each case into the receiving bore for the eccentric shaft. According to a possible realization, in a two-circuit vehicle brake system at least three cylinders are associated with each brake circuit to increase the operating comfort. To reduce wear, each of the provided eccentrics interacts with only two pump pistons.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: April 16, 2013
    Assignee: Lucas Automotive GmbH
    Inventors: Heinrich Plewnia, Werner Seibert
  • Publication number: 20120056471
    Abstract: A brake unit for a hydraulic, single- or multi-circuit brake system of a land vehicle with electric drive for carrying out regenerative braking by means of at least one electrical machine in or at the drive train of the vehicle and braking by means of at least one friction brake, wherein a brake pedal and at least one sensor for detecting a braking request of the driver is provided, a master cylinder for feeding pressurized hydraulic fluid into at least one brake circuit in accordance with the braking request, wherein a dividing cylinder is provided, which has a first hydraulic chamber and a second hydraulic chamber divided from the first by a dividing piston, wherein the first hydraulic chamber has a first port, which is connected to the master cylinder, and a second port, which is connected by a simulation valve to a line leading to the wheel brakes, and the second hydraulic chamber is connected by a shut-off valve to the low-pressure storage chamber, and an orifice is disposed in a connection line between
    Type: Application
    Filed: February 18, 2010
    Publication date: March 8, 2012
    Applicant: LUCAS AUTOMOTIVE GMBH
    Inventors: Heinrich Plewnia, Leo Gilles, Michael Keller, Boris Koeth
  • Publication number: 20100202903
    Abstract: A piston pump for a hydraulic pressure generator in a vehicle brake system is described. The piston pump comprises a housing, in which a bore for receiving an eccentric shaft is formed. In the housing at least six cylinders for receiving one pump piston each are further provided. The cylinders are disposed in pairs in three or more mutually spaced-apart planes and open out in each case into the receiving bore for the eccentric shaft. According to a possible realization, in a two-circuit vehicle brake system at least three cylinders are associated with each brake circuit to increase the operating comfort. To reduce wear, each of the provided eccentrics interacts with only two pump pistons.
    Type: Application
    Filed: July 2, 2008
    Publication date: August 12, 2010
    Applicant: LUCAS AUTOMOTIVE GMBH
    Inventors: Heinrich Plewnia, Werner Seibert
  • Patent number: 6672198
    Abstract: A vacuum brake booster (10) is described, having a vacuum chamber (16) and a working chamber (18) separated from one another by a movable wall (14), and a control valve (20), which comprises a housing (12) coupled workingly to the movable wall (14) and which to achieve a pressure difference at the movable wall (14) is capable of controlling the supply of atmospheric pressure or above-atmospheric pressure to the working chamber (18) in dependence upon the displacement of an actuating piston (28). The vacuum brake booster (10) has an emergency braking aid comprising a permanent magnet (38) and an armature (36), which cooperates with the permanent magnet (38) and is resiliently biased counter to actuating direction and during an emergency braking operation is drawn into abutment with the permanent magnet (38), with the result that the control valve (20) is held open for the supply of atmospheric pressure to the working chamber (18).
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: January 6, 2004
    Assignee: Lucas Automotive GmbH
    Inventors: Ludwig Friedsam, Heinrich Plewnia, Gerd Puscher, Peter Schl├╝ter
  • Publication number: 20030188632
    Abstract: A vacuum brake booster (10) is described, having a vacuum chamber (16) and a working chamber (18) separated from one another by a movable wall (14), and a control valve (20), which comprises a housing (12) coupled workingly to the movable wall (14) and which to achieve a pressure difference at the movable wall (14) is capable of controlling the supply of atmospheric pressure or above-atmospheric pressure to the working chamber (18) in dependence upon the displacement of an actuating piston (28). The vacuum brake booster (10) has an emergency braking aid comprising a permanent magnet (38) and an armature (36), which cooperates with the permanent magnet (38) and is resiliently biased counter to actuating direction and during an emergency braking operation is drawn into abutment with the permanent magnet (38), with the result that the control valve (20) is held open for the supply of atmospheric pressure to the working chamber (18).
    Type: Application
    Filed: April 30, 2003
    Publication date: October 9, 2003
    Inventors: Ludwig Friedsam, Heinrich Plewnia, Gerd Puscher, Peter Schluter