Continental Teves, Ag and Company Ohg

Continental Automotive Systems Corporation

Continental Automotive Technologies Gmbh

Aumovio Germany Gmbh

Harald Biller

Hans-Jörg Feigel

Stefan A Drumm

Marco Besier

Steffen Linkenbach

Christian Courth

Jan Hoffmann

Jürgen Böhm

Gunther Buschmann

Johann Jungbecker

Peter Stauder

Christoph Voss

Jochen Führer

Andreas Neu

Holger Kollmann

Michael Hitzel

Zlatko Penzar

Joachim Bohn

Marcus Forche

René Lenz

Christopher Scharf

Marco Beisier

Alexander Schoenbohm

José Garcia-Quilon

Axel Nieder-Vahrenholz

Fabian Wey

Jochen Klein

A method for operating a brake system having a brake fluid reservoir having a first and a second reservoir chamber which are separated by a first partition wall, wherein a first filling level in the brake fluid reservoir is determined by a first sensor element, and a second filling level in the brake fluid reservoir is determined by a second sensor element, wherein the brake system is operated in a first fallback operating mode when the determined first filling level in the brake fluid reservoir falls below a first predetermined level (p), and wherein the brake system is operated in a second fallback operating mode when the determined second filling level in the brake fluid reservoir falls below a second predetermined level (p), wherein the second level (p) is lower than the first level (p), and to a brake system.

Method for operating a brake system and brake system

A motor vehicle brake system includes a master brake cylinder actuatable by a brake pedal and having only one pressure chamber; an electrically controllable pressure supply device; a pressure medium reservoir, under atmospheric pressure from which the master brake cylinder and the pressure supply device are supplied with pressure medium; and at least two hydraulically actuatable wheel brakes. The wheel brakes can be actuated by the master brake cylinder or by the pressure supply device. The pressure chamber of the master brake cylinder is separably connected via an isolating valve to a first brake circuit supply line. The wheel brakes are divided into at least two wheel brake groups. The first wheel brake group connected to the first brake circuit supply line, and the pressure supply device connected to a second brake circuit supply line to which the second wheel brake group is connected.

Brake system for motor vehicles and method for operating a brake system

A method for operating a brake system for motor vehicles, comprising a master brake cylinder actuable by a brake pedal, an electrically controllable pressure provision device, a pressure medium reservoir tank, from which the master brake cylinder and the pressure provision device are supplied with pressure medium, and at least two hydraulically actuable wheel brakes and at least one electrically actuable inlet valve per wheel brake, wherein the wheel brakes are actuable either by the master brake cylinder or by the pressure provision device, the pressure medium reservoir tank is monitored by a device for determining a level of the pressure medium, wherein the wheel brakes are divided into at least one first wheel brake group and one second wheel brake group, and wherein the inlet valves of the first wheel brake group are closed when the determined level falls below a first limit value (s).

Method for operating a brake system for motor vehicles, and brake system

Method and system for determining a pressure/volume characteristic curve of a wheel brake in a motor vehicle brake system having an electrically controllable pressure supply device connected hydraulically to wheel brakes and can output a pressure medium volume for activating the wheel brakes. The pressure medium volume which is output by the pressure supply device can be determined. An electrically actuable inlet valve per wheel brake disconnects the connection between the wheel brake and the pressure supply device. During one or more service brake operations of the motor vehicle wheel brakes are activated by the pressure supply device, the pressure medium volume output by the pressure supply device in order to activate the wheel brakes is determined and the pressure/volume characteristic curves of the wheel brakes are determined on the basis of pressure medium volumes output by the pressure supply device during one or more service braking operations are determined.

Method for determining a pressure/volume characteristic curve of a wheel brake

A brake system for motor vehicles, having a brake master cylinder actuated by a brake pedal with at least one first pressure chamber. The brake master cylinder communicating with wheel brakes; and a hydraulic fluid storage container. A pressure balancing connection connects to the fluid storage container. A first electrically controllable pressure supply device communicating with the wheel brakes. A pressure regulating valve arrangement for regulated wheel brake pressure. A first electronic control and regulating unit actuated the first pressure supply device and the pressure regulating valve arrangement. A second electrically controllable pressure supply device connected to the brake master cylinder and having a pressure outlet connection paired with a second electronic control and regulating unit. The first and the second pressure supply device generate braking pressures independently of each other, and the pressure outlet connection is connected to the pressure balancing connection.

Brake system for motor vehicles

The invention relates to a method for determining a driving characteristic of an analogized or analog-controlled hydraulic valve of a brake system for motor vehicles, comprising hydraulically operatable wheel brakes, in which a brake pressure (pDBE), which is generated with the aid of an electrically controllable, electric-motor-driven () driven pressure supply device (), is conducted to a wheel brake (-) via an inlet valve (-) and can be conducted in particular via an outlet valve (-) from the wheel brake into a pressure medium container (). In order to operate the brake system, the pressure supply device and the inlet valves, and in particular the outlet valves, can be controlled by an electronic control and regulating unit (), wherein for determining the control characteristic of an analogized or analog-controlled inlet or outlet valve, a brake pressure is generated by the control and regulating unit via the pressure supply device, and the brake pressure (pDBE) is determined by means of a pressure sensor () associated with the pressure supply device, and the determined brake pressure and an associated valve control variable (I, U) are stored as a calibration point of the control characteristic (f, F). The invention also relates to a brake system.

Method for calibrating analog-controlled hydraulic valves and brake system comprising an electronic control and regulating unit in which the method is carried out

A method for operating a hydraulic system with a plurality of consumers an electrically controllable pressure supply device and an electrically actuable inlet valve, per consumer, which inlet valve is arranged between the pressure supply device and the consumer, wherein a pressure/volume relationship is predefined or determined for each consumer, wherein each consumer is assigned to a first group or a second group of consumers, wherein the first group of consumers includes at least one consumer, and wherein, in order to set predefined consumer-specific setpoint pressures, the first group of consumers is connected via the respectively opened inlet valve to the pressure supply device, and the inlet valves of the consumers of the second group are closed, wherein the inlet valve of a single, selected consumer of the second group is opened while being regulated to build up a pressure, and a brake system for motor vehicles.

Method for operating a hydraulic system and brake system

A motor vehicle brake system actuated in brake-by-wire and fallback operating modes, having a brake master cylinder, brake circuits, a pressure medium storage vessel, a brake pedal, a separating valve for separating the brake circuit into a first section connected to the separating valve the master cylinder, and a second section connected to the separating valve and the wheel brakes. A first pressure provision device has a piston actuated by an actuator, a simulation device connected by a simulator release valve to the master cylinder for a pleasant brake pedal feel in the brake-by-wire operating mode. A first electronic control and regulating unit actuates the first pressure provision device, the separating valves and the simulator release valve. A second pressure provision device has a suction connector and a pressure connector per brake circuit being connected to the inlet of the separating valve.

Brake system for motor vehicles and method for operating the brake system

A motor vehicle brake system operable in a brake-by-wire and fallback modes. The system includes a brake pedal (), a master cylinder (), a reservoir (), a travel simulator (), an electrically controllable pressure source (), isolation valves () pumps () and a low-pressure accumulator (), an inlet valve (-) and an outlet valve (-) for each wheel brake (), valves () connected to the pumps (), and a control and regulation unit (). A valve arrangement () establishes for each brake circuit (I, II) a connection from the pressure chamber () of the master cylinder () to the modulator admission pressure line () and disconnects the connection when unenergized, the valve arrangement () preventing the pressure source () from being subjected to pressure from the pressure chambers ().

A motor vehicle brake system and method operable in a brake by wire and in a fallback operating mode. In addition to a first pressure supply unit a second electrically controllable pressure supply unit having at least one intake port and one pressure port, the intake port of which is connected or connectable to one of the pressure chambers and the pressure port of which is connectable or connected to the brake circuit associated with the pressure chamber. The second pressure supply unit is arranged in the hydraulic connection between one of the pressure chambers of the brake master cylinder and the brake circuit associated with the pressure chamber.

A method in which open- or closed-loop control of a motor vehicle brake system is carried out having friction brakes on the wheels of at least one axle, wherein the brake pressure generating means for the wheels of at least one axle are in a direct operative connection to the brake pedal, and at least one electrical machine is in an operative connection to at least one axle which can be used by applying an electrically regenerative braking torque for converting kinetic energy into electrical energy. In order to raise the efficiency level of the recuperation, the regenerative deceleration is increased even in the case of an unchanged brake pedal position and/or brake pedal force, and a motor vehicle brake system which is open-loop or closed-loop controlled.

Method for controlling a motor vehicle brake system

A brake system includes a hydraulic actuating unit, which can be actuated by way of a brake pedal, a travel simulator interacting with the hydraulic actuating unit, a pressure medium reservoir under atmospheric pressure assigned to the hydraulic actuating unit, a first electrically controllable pressure supply device, a second electrically controllable pressure supply device, an electronic control unit and an electronically controllable pressure modulation device for setting wheel-specific brake pressures. The brake system preferably operates in a 'brake-by-wire' mode but can also operate in a fallback mode. The second electrically controllable pressure supply device can provide boost volume during braking in a fallback mode.

A system and method for operating a brake system for motor vehicles, includes a master brake cylinder actuated by a brake pedal and separably connected to at least one hydraulically acutuatable wheel brake by at least one brake circuit, a hydraulically operable pedal travel simulator is connectable to the master brake cylinder, an electrically controllable pressure provision apparatus is separably connected to the brake circuit, and an electronic open-loop and closed-loop control unit. Upon brake pedal actuation, a pressure of the pressure provision apparatus is applied to the brake circuit in a first operating mode and the pressure of the master brake cylinder is applied to the brake circuit in a second operating mode. In the event of transition from the second operating mode to the first operating mode while the brake pedal is actuated, the actuation travel of the brake pedal is adjusted by electronic open-loop or closed-loop control.

A system and method for operating a hydraulic braking system) for motor vehicles with an electrically controllable pressure provision device), a high-pressure accumulator, which can be connected to the pressure provision device via a hydraulic connection), in which an electrically controllable shutoff valve is arranged, wheel brakes, which can be supplied with pressure medium by means of the pressure provision device and/or the high-pressure accumulator. An electronic control and regulating unit is provided for actuating the electrically controllable pressure provision device and/or the electrically controllable shutoff valve so as to regulate the hydraulic pressure which is provided by the pressure provision device and the high-pressure accumulator If a pressure buildup is carried out by activation of the pressure provision device, the high-pressure accumulator is connected only temporarily by at least partial opening of the shutoff valve.

Method for operating a braking system

A pressure regulating valve having a compression spring fixed in a valve housing for positioning a valve plunger connected to a magnetic armature in the position above a valve seat and not electromagnetically excited, in order to create a connection between at least two pressure medium channels opening into the valve housing, and having a further compression spring disposed coaxially to the first compression spring in the valve housing, having the characteristic that the first compression spring is designed as a control spring forming a stroke and force-specific spring drive by adjusting the spring rates of both compression springs to the force/distance curve of an electromagnet by varying the current in an exciter coil, wherein the further compression spring is designed as a variably adjustable spring acting opposite to the control spring.

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Eschborn, Germany

Harald Biller