Robert Boschgmbh

Ford Global Technolgoies, LLC

Herbert Vollert

Dietmar Baumann

Dirk Hofmann

Willi Nagel

Bertram Foitzik

Andreas Henke

Bernd Goetzelmann

Reinhard Weiberle

Manfred Gerdes

Frieder Keller

Jens Kolarsky

Hanniel Schmidt

Chi-Thuan Cao

Dirk Mahnkopf

Timo Jahnz

Hardy Haas

Volker Mehl

Ian C Faye

Michael Kunz

Karl-Heinz Willmann

Stefan Strengert

Jochen Mayer

Thomas Svensson

Anton Dukart

Frank Kneip

Stephan Hoenle

Hans Frick

Christian Binder

Remy Garnier

Matthias Kistner

Patrick Christian Schaefer

Oliver Fuchs

Helmut Suelzle

Dirk Foerch

Otmar Bussmann

Jens Wagner

Ian Moore

Matthias Schanzenbach

Urs Bauer

Ralf Kinder

Rudolf Daniels

Armin Verhagen

Florian Haag

Andreas Reppich

Oliver Leibfried

Christian Meister

Christian Michael Praetorius

Juergen Hilzinger

Rami Scharbak

Markus Weigel

Joerg Riethmueller

Christian Woerz

Dagobert Masur

Volkmar Schlotter

Branimir Tokic

Michael Butz

Jonathan P Schnur

Suekrue Senol

Zied Terchella

Hubert Moeller

Stephane Schmit

Joern Tilsch

Holger Heinemann

Venting a cylinder of a piston-cylinder unit of a power brake pressure generator of a hydraulic power brake system for a motor vehicle. A piston in the cylinder is displaced from a forward-displaced position back into a home position and subsequently forward again. When the piston is displaced back, a connection valve is closed so that the piston sucks brake fluid from a brake fluid container, the brake fluid flowing over a lip seal acting in the manner of a pressure relief valve as the first piston seal. During the forward stroke, the piston pushes brake fluid through the then open connection valve into the brake fluid container. Any air contained in the cylinder is pushed with the brake fluid from the cylinder and separates from the brake fluid in the brake fluid container.

Method for venting a cylinder of a piston-cylinder unit of a power brake pressure generator of a hydraulic power brake system

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 control apparatus/method for operating an electromechanical brake booster of a vehicle braking system, including: applying control to an electromechanical brake booster motor in consideration at least of a braking definition signal regarding a braking input of a driver and/or automatic speed control system of the vehicle (ACC); specifying, in consideration at least of the braking definition signal, a target motor force of the electromechanical brake booster motor or a target brake application force of the electromechanical brake booster into a brake master cylinder, downstream from the electromechanical brake booster, of the braking system; and applying control to the electromechanical brake booster motor in consideration of a force difference between the specified target motor force and an estimated/measured actual motor force of the motor, or between the specified target brake application force and an estimated/measured actual brake application force of the electromechanical brake booster into the downstream brake master cylinder.

Control device and method for operating an electromechanical brake booster of a brake system of a vehicle

The disclosure relates to a control device and a corresponding method for operating an electromechanical brake booster of a brake system of a vehicle, comprising an electronics unit that defines a target variable with respect to a target rotational speed of a motor of the electromechanical brake booster, taking into account a brake input signal with respect to a braking request, and that sends at least one control signal to the motor. The electronics unit defines a maximum target variable with respect to a maximum target rotational speed of the motor, taking into account a current intensity of a motor current of the motor and a current angle of rotation of a rotor of the motor, and defines the target variable with respect to the target rotational speed of the motor of the electromechanical brake booster to be at the most equal to the defined maximum target variable.

In an electronic evaluation system for a vehicle braking system equipped with an electromechanical brake booster, a method for estimating a brake master cylinder pressure includes: estimating a first initial value of the pressure based on a first current intensity of a current of a motor of the booster at the first time and on a first rotation angle of a rotor of the motor at the first time; specifying a correction value as a difference between the first initial value and a measured value of the pressure; estimating a second initial value of the pressure based on a second current intensity of the current at the second time and on a second rotation angle of the rotor at the second time; and specifying, based on the second initial value and the correction value, an estimated value of the pressure at the second time.

Evaluation electronics and method for estimating a master brake cylinder pressure in a vehicle brake system equipped with an electromechanical brake booster

A method is described for operating an electrical system, in particular, of a motor vehicle, which includes at least one electrical consumer, at least one energy source for electrical energy, and at least one control unit, the consumer being test activated by the control unit for the purpose of initializing a start of the system and a voltage level of an electrical voltage in the system being monitored and compared to a predefinable minimum value, and the activation being interrupted if the voltage level falls below the minimum value, and the consumer being subsequently test reactivated. It is provided that the number of the interruptions is counted and the consumer is deactivated at least for a predefinable period of time upon reaching a predefinable maximum number.

Method, control unit, and electrical network

A braking system for a vehicle, which includes a control system configured to: actuate a pressure generation device in accordance with a braking request signal to generate the brake pressure; ascertain an operational state of the pressure generation device; ascertain a position of a displacement piston of a brake master cylinder based on the braking request signal; and couple a pressure modulation device to a brake master cylinder volume and actuate the device so that the pressure modulation device conveys brake fluid out of the brake master cylinder volume into the wheel brake circuit, if the operational status of the pressure generation device is ascertained to be nonoperational and the displacement piston is in the idle position.

Braking system for a vehicle and method for braking a vehicle

A method for boosting a braking force in an electronically slip-controllable vehicle brake system, as well as an electronically slip-controllable vehicle brake system. Vehicle brake systems of this kind are at least equipped with a power brake unit and electronic slip-controllable vehicle brake system. In the case of a malfunction of the power brake unit, the traction-slip control device () takes over the boosting. A method for determining a composite signal which is adjusted by controlling a drive of a pressure generator of the slip-controllable vehicle brake system accordingly. To this end, an electronic control unit records two mutually independent input quantities, converts these input quantities into evaluation signals and sums the evaluation signals mathematically to yield a composite signal. The latter represents a setpoint brake pressure that the slip-controllable vehicle brake system supplies by controlling a pressure generator accordingly.

Method for boosting the brake power in an electronically slip-controllable vehicle brake system, as well as an electronically slip-controllable vehicle brake system

A method for controlling a brake booster in a hydraulic brake system, in which the smallest partial pressure target value of at least three partial pressure target values is ascertained, and is then defined as the target pressure value and is then set using a brake booster.

Method for operating a brake booster, control device for carrying out the method, and a brake system comprising the brake booster and the control device

An electromechanical brake booster is provided for a braking system of a vehicle, having a valve body and an input rod, the valve body, to which at a displacement motion in a brake application direction has been imparted, being displaceable up to a differential travel equal to a limit differential travel with reference to the input rod, and then a co-displacement motion in the brake application direction being impartable to the input rod if the co-displacement motion is acted against at most by a retention force below a predefined threshold value, and at least one buffer element being disposed on the input rod and/or on the valve body in such a way that if a retention force above the predefined threshold value acts against the co-displacement motion, the differential travel is increasable above the limit differential travel by way of a deformation of the at least one buffer element.

Electromechanical brake booster and method for operating an electromechanical brake booster

The present invention relates to a braking device and to a braking system, each having a master brake cylinder () having at least one first pressure chamber () that is subdivided or is able to be subdivided at least into a first partial volume () and a second partial volume (), which are hydraulically connectable or connected to a brake fluid reservoir (), a first brake circuit () being hydraulically connectable or connected to the first partial volume (), and having a valve device () that is mechanically designed in such a way that a pressure buildup up to a mechanically specified limit pressure may be brought about in the second partial volume (), brake fluid being transferable at least into the first brake circuit () via at least one subcomponent () of the valve device (), and an exceeding of the limit pressure in the second partial volume () being prevented.

Braking device for a braking system of a vehicle and braking system for a vehicle

A method for operating a regenerative braking system of a vehicle includes: applying control to at least one valve of a brake circuit, before and/or during operation of a generator of the braking system, so that brake fluid is displaced out of a brake master cylinder and/or out of the at least one brake circuit into at least one reservoir volume; defining a target force difference variable regarding a booster force exerted by a brake booster in consideration of at least one of a generator braking torque information item, a brake master cylinder pressure variable, and an evaluation variable derived from at least the generator braking torque information item or the brake master cylinder pressure variable; and controlling the brake booster in consideration of the defined target force difference variable.

Method for operating a regenerative brake system of a vehicle, control device for a regenerative brake system of a vehicle, and regenerative brake system

The invention relates to a hybrid brake system having a hydraulic service brake system and an electromechanical service brake system. According to the invention, a brake booster is designed as a pedal simulator, which can be used to boost power and to generate a pedal power which is counter to the direction of actuation. When the hydraulic service brake system fails, the electromechanical service brake system is used for braking and the brake booster generates a pedal power which allows or facilitates dosage of the brake actuation.

Brake system for a motor vehicle and method for controlling the same

A method for operating a brake booster of a vehicle includes: establishing an actual displacement speed signal of an input rod, to which a driver brake force is at least partially transmitted; filtering high-frequency and/or low-frequency signal components out of the established actual displacement speed signal; establishing a setpoint displacement speed signal of at least one booster piston, which is displaceable with the aid of the brake booster, at least in consideration of a predefined characteristic curve and the filtered actual displacement speed signal; and establishing an activation signal of the brake booster at least in consideration of the established setpoint displacement speed signal and outputting the activation signal to the brake booster to displace at least the booster piston at an execution speed corresponding to the activation signal.

Method for operating a brake booster of a vehicle and control device for a break booster of a vehicle

A method for operating a motor vehicle hydraulic braking system having at least one electric motor-operated braking pressure generator. The output power of the electric motor-operated braking pressure generator is restricted during normal driving/braking situations and the restriction is temporarily deactivated upon identification of a critical driving situation, such as an overstressing of the brake system to include brake fade.

Method for operating a hydraulic brake system

Growing community of inventors

Vaihingenenz, Germany

Herbert Vollert