Robert Boschgmbh

Dirk Foerch

Matthias Kistner

Michael Dinerman

Andreas Krautter

Michael Bunk

Simon Hansmann

Bertram Foitzik

Rene Schepp

Jens Wagner

Volker Edelmann

Daniel Frank

Reinhard Fink

Christian Woerz

Julia Jeschke

Verena Barske

Norbert Alaze

Wolfgang Schuller

Herbert Vollert

Michael Kunz

Chris Anderson

Raynald Sprocq

Otmar Bussmann

Jens Kolarsky

Werner Quirant

Timo Jahnz

Harald Guggenmos

Hans Heckmann

Urs Bauer

Elmar Vier

Werner-Karl Marquardt

Peter Ziegler

Thomas Weitze

Joerg Fricke-Schmidt

Timo Haible

Stefan Zahariev

Harald Hermann

Erich Ludewig

Andreas Karl

Jochen Feinauer

Steffen Benzler

Franz Dahlke

Friedrich Mueller

Philipp Grell

Anton Fritz

Ulrike Schaefer

Florent Yvonet

Thomas Loeffler

Markus Lang

Nikolai Mueller

Dirk Bodenschatz

Andreas Wenzel

Manfred Schulla

Marcus Bucher

Andres Alvarez Noriega

Maximilian Luka

Mario Seiler

Nico Pflueger

Robin Gruenagel

Bernd Klepser

Armin Frueh

Martin Hochdoerffer

A method for determining a p-V characteristic of at least one wheel brake cylinder of a brake system of a vehicle. The method includes: increasing a pressure prevailing in the wheel brake cylinder during a measurement time interval, wherein a volume variable that reflects a present volume in the wheel brake cylinder, and a pressure variable that reflects a present pressure in the wheel brake cylinder, are determined at least once during the measurement time interval, and setting the p-V characteristic of the wheel brake cylinder taking into consideration the volume variable and the pressure variable. Before the measurement time interval, during a pressure increase interval, a pressure exerted on the closed wheel inlet valve and/or the closed isolating valve is increased with an average pressure build-up gradient greater than or equal to 50 bar/second up to a limit pressure of greater than or equal to 25 bar.

Control device and method for determining a p-V characteristic of at least one wheel brake cylinder of a brake system of a vehicle

Wheel brakes of one vehicle axle of a dual-circuit hydraulic-power vehicle brake system for an electric or hybrid vehicle are connected to one brake circuit. Brake pressure is applied by a power brake-pressure generator to the two brake circuits with a time offset. It is thereby possible to compensate for a deceleration effect of an electric motor of the vehicle, which is operated as a generator during a braking.

Service brake application utilizing a multi-circuit hydraulic-power vehicle brake system

A method for controlling a brake system. The brake system includes an actuating device, a master brake cylinder, a brake circuit, a wheel brake, and a brake pressure generator. The brake pressure generator and the master brake cylinder are capable of being contacted, parallel to one another, to the brake circuit. A pressure generator control valve controls a first pressure medium connection between the brake pressure generator and the brake circuit. A brake circuit control valve controls a second pressure medium connection between the brake circuit and the master brake cylinder. The brake system is operated in an operating state during which the pressure generator control valve assumes an open position without a brake pressure prevailing in the brake circuit and without a buildup of brake pressure being carried out. During this operating state, the brake circuit control valve is controlled to assume an open position.

Method for controlling an electronically slip-controllable externally powered brake system, in particular for a motor vehicle, and electronically slip-controllable externally powered brake system, in particular for a motor vehicle

An electronically slip-controllable power braking system for a motor vehicle, in which a controllably drivable pressure generator supplies multiple brake circuits connected in parallel to one another with pressure medium under brake pressure. Each of the brake circuits are separable through existing first control valves from the pressure generator and include second control valves that are connected downstream from the first control valves to control the brake pressure in the wheel brakes, which are connected with the brake circuits. An electronic control unit in the brake circuits has three devices, the third device puts the first control valve of a brake circuit into a passage position if a leakage is established downstream from the second control valve in this brake circuit and if it is established that the pressure generated by the pressure generator has at least approximately reached or exceeded a pressure limit of the first control valve.

Electronically slip-controllable power braking system

A device for a hydraulic braking system of a vehicle. The device includes a processing unit, which is programmed to determine at least one brake characteristic value of the hydraulic braking system, the processing unit being programmed to determine the at least one brake characteristic value as a vehicle axle-specific brake characteristic value, which in each case corresponds to a ratio between a brake pressure in all wheel brake cylinders assigned to a shared vehicle axle of the vehicle and a vehicle axle braking torque exerted on the shared vehicle axle with the aid of the wheel brake cylinders. A method for determining at least one brake characteristic value of a hydraulic braking system of a vehicle, and a method for decelerating a vehicle with a hydraulic braking system and an electric motor usable as a generator, are also described.

Device and method for determining at least one brake characteristic value of a hydraulic braking system of a vehicle

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.

Method for operating a brake system, and brake system

A master brake cylinder for a brake system of a vehicle having a master brake cylinder housing, a primary piston component, a secondary piston component, a primary spring device which is preloaded with a first preload force between the primary piston component and the secondary piston component, and a secondary spring device, which is preloaded with a second preload force between the secondary piston component and a wall component (of the master brake cylinder housing, with the second preload force of the secondary spring device being greater than the first preload force of the primary spring device. A brake device for a vehicle, a brake system for a vehicle, and a production method for a mater brake cylinder for a brake system of a vehicle are also described.

Master brake cylinder for a brake system of a vehicle, brake device and brake system having such a master brake cylinder, and method for producing a master brake cylinder

To avoid an exceedance of a permissible maximum pressure in a hydraulic vehicle power braking system including anti-slip regulation, continuous valves are to be utilized as inlet valves of wheel brakes of the vehicle braking system, and the inlet valve of a wheel brake, whose outlet valve will be opened or is open in order to regulate the wheel brake pressure, is to be partially closed, so that this inlet valve acts as a throttle and limits a brake pressure in the vehicle braking system.

Method for avoiding an exceedance of a permissible maximum pressure of a hydraulic vehicle power braking system including anti-slip regulation

A method for switching over a solenoid valve having a movable valve body between a first position and a second position, wherein the method comprises at least the following method steps: a) adjusting a switching current to a pre-energization current intensity, in which the valve body remains in the present position, for a first time interval, and b) adjusting the switching current to a first switchover current intensity, which introduces a switchover movement of the valve body, for a second time interval.

Method for switching over a solenoid valve

A control device is described for a brake system of a vehicle, having an electronics device that is designed to operate a motorized piston-cylinder device in a pressure buildup mode and simultaneously to control or to hold at least one first separating valve, via which at least one wheel brake cylinder is connected to a master brake cylinder, in its closed state, and to control or to hold at least one second separating valve, via which the at least one wheel brake cylinder is connected to the motorized piston-cylinder device, in its open state, and to operate the motorized piston-cylinder device in a suctioning mode, and at the same time to control the at least one second separating valve to its closed state, the electronics device being in addition designed to control the at least one first separating valve to its open state at least at times during the suctioning mode. A method is also described for increasing at least one brake pressure in at least one wheel brake cylinder of a brake system of a vehicle.

Control device and method for increasing at least a brake pressure in at least one wheel-brake cylinder of a brake system of a vehicle

A motor/pump assembly for a brake system includes at least one fluid pump arranged in a pump housing, an electric motor having a motor shaft configured to drive the fluid pump, a control unit arranged on the pump housing and configured to set a current rotational speed and/or a current torque of the motor, and a sensor arrangement having a measured value transmitter arranged within the pump housing and a magnetic measured value pickup stationarily arranged in the control unit. The control unit is further configured to detect contactlessly a current rotational angle of the shaft via the sensor arrangement, and to evaluate the angle to control the motor. The transmitter, in accordance with a rotary motion of the shaft, is configured to influence at least one magnetic variable of a magnetic field detected by the pickup.

Motor and pump assembly for a brake system

A master brake cylinder is described for a brake system of a motor vehicle as having a hydraulic cylinder that has a plurality of hydraulic connections, in which at least one hydraulic piston is mounted so as to be displaceable axially in a direction of actuation and in a relief direction, the hydraulic piston being displaceable against the force of a spring element in the direction of actuation, the hydraulic piston having at least one lateral wall opening that, in at least one sliding position, opens into an inner chamber of the hydraulic cylinder. It is provided that the lateral wall opening is assigned an elastically deformable sealing ring that on its inner side is fastened on the hydraulic piston and on its outer side is pre-loaded against the hydraulic cylinder by its inherent elasticity and is shaped such that when the hydraulic piston is displaced in the direction of actuation it detaches from the hydraulic cylinder, and when the hydraulic piston is displaced in the relief direction it bears on the hydraulic cylinder.

Master brake cylinder, braking system

A braking device for a vehicle, in particular a motor vehicle, including an actuatable brake pedal, a piston of a master brake cylinder mechanically coupled to the brake pedal, the piston being supported in the master brake cylinder so as to be axially displaceable in an actuation direction and in a release direction, and including at least one radial seal that acts between the piston and the master brake cylinder. At least one elastically deformable and/or displaceable damping element opposes the displacement of the piston in the release direction.

Brake device for a vehicle

A valve for controlling fluids, in particular hydraulic fluid, includes a first connector opening and a second connector opening, a preliminary stage with a first valve seat and a first displaceable closing body, and a main stage with a second valve seat and a second displaceable closing body. The first valve seat is assigned to a through opening of the second closing body. A filtering gap is formed in a flow path from the first connector opening to the preliminary stage by way of a constriction of the flow path.

Two-stage solenoid valve

A magnetic valve includes a valve component and a valve body that engages around a region of the valve component in a hood-like manner and in a sealing manner in at least one sealing region. A flow chamber is formed between the valve body and an end face of the valve component. The valve component has an axially running through-channel with a constant cross-section which passes through the end face and which opens into the flow chamber so as to form an axial duct for a fluid. The valve body has a through-opening that is fluidically connected to the flow chamber and is configured to be closed by a closing element that is movably arranged on a valve body face that faces away from the flow chamber. The end face is configured as a type of lip seal ring.

Magnetic valve

Growing community of inventors

Neuenstadt/Stein, Germany

Dirk Foerch