Robert Boschgmbh

Robert Bosch Gmbh

Martin Marquart

Willi Nagel

Manfred Gerdes

Florian Haag

Nikolas Loeffelmann

Helmut Suelzle

Patrick Lellmann

Jochen Wagner

Herbert Vollert

Thomas Heimberger

Fabian Wunderlich

A method for operating a brake system of a motor vehicle, with a controllable brake booster, and with a brake pedal. In the method, the brake booster is controlled, as a function of an actuation of the brake pedal, to generate a hydraulic pressure in the brake system, the motor vehicle is monitored for a standstill of the motor vehicle, an actuation path of the brake pedal is monitored for an exceedance of a specified limit value, and a holding function for maintaining the hydraulic pressure present in the brake system is activated if a standstill and a limit value exceedance are detected. At least one state variable of the motor vehicle is ascertained and that the limit value is specified as a function of the at least one state variable.

Method for operating a brake system of a motor vehicle, control unit, brake system

A method for operating a brake system of a vehicle, in particular, of a motor vehicle. The brake system includes at least one electric actuator, in particular, a brake booster, which may be driven to generate a braking force, the actuator being controllable by an autonomous driving system, and as a function of manipulation of a brake pedal of the vehicle; and an emergency braking action being initiated, when the actuator is driven both by the autonomous driving system and by manipulation of a brake pedal. The control by the autonomous driving system is superimposed with a varying validation signal, a differential travel between an actuator element of the actuator and the brake pedal is monitored, and the driving of the actuator via manipulation of the brake pedal during the control by the autonomous driving system is detected, if the differential travel varies.

Method and device for operating a brake system and a vehicle having the brake system

A method for controlling a power brake system, for a motor vehicle engaged in piloted driving, which includes two electrically controllable actuator units. The first actuator unit includes a braking-intent detection device, and a first pressure generation unit for generating a brake pressure in a brake circuit. The second actuator unit includes a second pressure generation unit redundant to the first pressure generation unit. A first electronic control device acquires signals of the braking-intent detection device and controls the actuator unit based on the detected braking intent. In response to detected functional impairment, the first motor of the pressure generation unit ceases to be controlled, and the second motor of the pressure generation unit of the second actuator unit is controlled to generate brake pressure. Detection of a braking intent and wheel-specific modulation of the brake pressure, continue to be carried out, using devices of the first actuator unit.

Method for controlling a power brake system capable of controlling traction electronically, and power brake system

A method for operating a braking device of a vehicle, including a main braking system, and a backup braking system. The braking device includes a main braking system control unit, and a backup braking system control unit. The method includes detecting an error of a brake function of the braking system, locating the error inside the braking device, classifying the error with regard to the corresponding brake function and the braking system, and transferring a brake function detected as erroneous for the main braking system to the backup braking system in the event that the error concerns solely the main braking system, so that the brake function may still be carried out with the aid of the backup braking system.

Method for operating a braking device

A method for operating a vehicle brake system including a brake booster and an electronic traction control device, which is used as a fallback level in a malfunction of the brake booster. The position of an accelerator pedal is ascertained when a malfunction of the brake booster is detected, and under the precondition that the accelerator pedal is released, a predefined initial pressure is built up in a pressure chamber of a master brake cylinder of the vehicle brake system with the aid of the traction control device so that a deceleration of the vehicle is induced. A control unit which is designed to carry out the method, and a vehicle having a vehicle brake system and a control unit, are also described.

Method for operating a vehicle brake system, control unit, and vehicle

A method for operating a braking force generator for a motor vehicle having a hydraulic braking system. The braking force generator, in a first working mode, builds up braking force independently, and in a second working mode, builds up braking force to assist the driver. A strategy for operating the braking force generator is adapted depending on a driving situation. A corresponding apparatus is also provided.

Apparatus and method for operating a braking force generator

A communication method between a brake booster of a vehicle and an ESP control unit of the vehicle. In the method, a signal is coupled into a brake fluid, transported between the brake booster and the brake control unit over a brake line filled with the brake fluid, and extracted again from the brake fluid.

Communication method between a brake booster of a vehicle and an ESP control unit of the vehicle, and a brake system

A method for ascertaining an available fluid volume in a tank for brake fluid of a braking system. The braking system includes a pressure generator fluidically connected to the tank on the one hand and to at least one brake circuit on the other hand, which is activatable for generating a hydraulic pressure in the braking system as brake fluid is withdrawn from the tank. A drop below a predefined limiting value for a fill level of the brake fluid in the tank is monitored with the aid of a binary sensor assigned to the tank. It is provided that an actuation of the pressure generator is monitored and that the available fluid volume is ascertained as a function of the actuation of the pressure generator when the instantaneous fill level drops below the limiting value.

Method and device for ascertaining an available fluid volume, braking system

The method relates to a method for boosting the braking force in an electromotor operated slip-controllable vehicle brake system having electromechanical brake boosting. The vehicle brake system includes a braking-intention detection device, an electromechanically actuatable brake booster, and an electronically actuatable brake-pressure control device. In the event of a malfunction of the brake booster, the boosting of the brake pressure is alternatively assumed by the brake-pressure control device. In the event of a malfunction of the brake boosting, it is checked whether a generation and a transmission of a trigger signal representing the actuation of the braking-intention detection device from the first electronic control device of the brake booster to a second electronic control device of the brake-pressure control device is possible, and if this is so, the trigger signal is transmitted via an existing communications link between the control devices.

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Reichenbach, Germany

Martin Marquart