Abstract: An electrohydraulic brake controller comprises at least two first and two second output ports for at least four wheel brakes, s hydraulic pressure source, a first electronic open-loop and closed-loop control unit, a second electronic open-loop and closed-loop control unit, an inlet valve for each first and second output port, and an outlet valve for each first and second output port. A pressure chamber is connected via a first pressure activation valve to a brake line section to which the at least four inlet valves are connected. If the first electronic control unit fails, an electromechanical actuator is activated by the second electronic control unit and builds up pressure to actuate the wheel brakes. If the second electronic control unit fails, the electromechanical actuator is activated by the first control unit and builds up pressure to actuate the wheel brakes.

Abstract: A method for operating a braking system of a vehicle, wherein the braking system comprises a primary hydraulic braking system and a brake actuation unit hydraulically decoupled from the primary braking system. The brake actuation unit comprises at least two sensor arrangements which are configured to detect, independently of one another, actuation information of the brake actuation unit describing a brake request.

Abstract: A motor vehicle brake system having at least four hydraulically actuatable wheel brakes, including an electrically actuatable inlet valve for each wheel brake. A master brake cylinder actuable by a brake pedal is separably hydraulically connected via an isolation valve to a brake supply line to which the inlet valves are connected, and an electrically controllable pressure-providing device having a pressure space hydraulically connected to the brake supply line. An electrically actuatable circuit isolation valve inline with the brake supply line. With the circuit isolation valve closed the brake supply line is hydraulically separated into first and second line sections. The first line section connected to two of the inlet valves, and the second line section connected to the remaining inlet valves. The pressure space is hydraulically connected to the second line section.

Abstract: A motor vehicle brake system having at least four hydraulically actuatable wheel brakes, including an electrically actuatable inlet valve for each wheel brake. A master brake cylinder actuable by a brake pedal is separably hydraulically connected via an isolation valve to a brake supply line to which the inlet valves are connected, and an electrically controllable pressure-providing device having a pressure space hydraulically connected to the brake supply line. An electrically actuatable circuit isolation valve inline with the brake supply line. With the circuit isolation valve closed the brake supply line is hydraulically separated into first and second line sections. The first line section connected to two of the inlet valves, and the second line section connected to the remaining inlet valves. The pressure space is hydraulically connected to the second line section.

Abstract: A hydraulic brake system equipped for anti-slip control and for active brake interventions has a self-priming pump. A pressure retention valve prevents the brake system's low-pressure accumulator and the wheel brakes from being evacuated below atmospheric pressure during a sensitive brake operation. A two-position valve deactivates the bias of the pressure retention valve by opening a fluid path from the low-pressure accumulator to the pump when it is desired that the wheel brakes be retracted farther to reduce drag and excessive wear of the brake friction elements.

Abstract: An electronically controllable brake system includes an electronic controller installed within the motor vehicle for actuating electrohydraulic components of the brake system and for operating the electrohydraulic components during the process of filled with hydraulic fluid and for removing air from hydraulic components of the brake system. A filling sequence is performed according to a predetermined filling profile that utilizes on-board sensors that detect brake system pressure and identify a defined pressure in conformity with a desired filling profile.

Abstract: A hydraulic brake system equipped for anti-slip control and for active brake interventions has a self-priming pump. A pressure retention valve prevents the brake system's low-pressure accumulator and the wheel brakes from being evacuated below atmospheric pressure during a sensitive brake operation. A two-position valve deactivates the bias of the pressure retention valve by opening a fluid path from the low-pressure accumulator to the pump when it is desired that the wheel brakes be retracted farther to reduce drag and excessive wear of the brake friction elements.

Abstract: A hydraulic unit for a motor vehicle brake system operating on the recirculation principle, in which each brake circuit has in the region of the hydraulic unit a prefilling location which opens into the pump suction conduit between the pressure-retaining valve and the change-over valve for the purpose of receiving brake fluid. The hydraulic unit can thereby be prefilled with lower complexity and cost in terms of time and processes prior to installation in the vehicle.

Abstract: A hydraulic unit for a motor vehicle brake system operating on the recirculation principle, in which each brake circuit has in the region of the hydraulic unit a prefilling location which opens into the pump suction conduit between the pressure-retaining valve and the change-over valve for the purpose of receiving brake fluid. The hydraulic unit can thereby be prefilled with lower complexity and cost in terms of time and processes prior to installation in the vehicle.

Abstract: The invention solves the problem of supplying fresh fluid, in particular in electrohydraulic brake systems, to all areas of the conduit systems that are not reached in a conventional brake fluid change. Therefore, the invention provides that a change of the pressure fluid be assisted by a hydraulic pump, during which change among others pressure fluid is delivered by means of the pump out of the pressure fluid reservoir through the inlet valves and out of the system through opened wheel bleeder connections.

Abstract: The invention discloses a method for determining the air content of the brake fluid in a hydraulic braking system. This method also permits determining the quality of the bleeding of the braking system. The principle of the method is a comparison of the volume intake with the respectively achieved pressure. The correlation is compared to nominal values. As the volume intake is determined by the clearance, the system is set by means of a pre-actuation to an initial condition before each actual measurement.

Abstract: The invention relates to an electrohydraulic assembly for an electronically controlled brake system with an accommodating member which includes accommodating bores for electrohydraulic valves, accommodating bores for hydraulic supply devices and an accommodating bore for at least one roller bearing, and with hydraulic channels and pressure fluid ports, as well as with an electric motor comprising a rotor with a shaft that is mounted with the roller bearing in the associated accommodating bore in the accommodating member and used to drive the supply devices, and with an electronic control unit being connected to the electric motor by means of a plug penetrating a through-bore in the accommodating member. The objective is to provide a safe and comfortable operating characteristics even in consideration of extreme environmental influences.

Abstract: The problem underlying the invention resides in that in particular in electrohydraulic brake systems certain areas in the conduit system are not reached during conventional bleeding. This especially occurs if, during repair work carried out on the system, the intake conduit of the pump of the system is detached. Accordingly, in the practice of the invention, a pump-operated bleeding is provided wherein, among other things, pressure fluid from the pressure fluid reservoir, with the outlet valves opened, is returned, by means of the outlet valves, by the pump to the reservoir. To that effect, the pump and the outlet valves, respectively, can be actuated in clockwise manner, thereby producing pressure pulses capable to remove adhering air bubbles.

Abstract: The invention solves the problem of supplying fresh fluid, in particular in electrohydraulic brake systems, to all areas of the conduit systems that are not reached in a conventional brake fluid change. Therefore, the invention provides that a change of the pressure fluid be assisted by a hydraulic pump, during which change among others pressure fluid is delivered by means of the pump out of the pressure fluid reservoir through the inlet valves and out of the system through opened wheel bleeder connections.

Abstract: The invention discloses a method for determining the air content of the brake fluid in a hydraulic braking system. This method also permits determining the quality of the bleeding of the braking system. The principle of the method is a comparison of the volume intake with the respectively achieved pressure. The correlation is compared to nominal values. As the volume intake is determined by the clearance, the system is set by means of a pre-actuation to an initial condition before each actual measurement.

Abstract: The invention relates to an electrohydraulic assembly for an electronically controlled brake system with an accommodating member which includes accommodating bores for electrohydraulic valves, accommodating bores for hydraulic supply devices and an accommodating bore for at least one roller bearing, and with hydraulic channels and pressure fluid ports, as well as with an electric motor comprising a rotor with a shaft that is mounted with the roller bearing in the associated accommodating bore in the accommodating member and used to drive the supply devices, and with an electronic control unit being connected to the electric motor by means of a plug penetrating a through-bore in the accommodating member. The objective is to provide a safe and comfortable operating characteristics even in consideration of extreme environmental influences.

Abstract: A pressure fluid accumulator with a housing having its interior subdivided by a media-separating element into two chambers, the first chamber being filled with a gas and the second chamber being filled with a liquid, and wherein in a hydraulic port a bottom valve is provided which permits filling the second chamber with liquid and prevents complete evacuation of the second chamber, and the valve's closure member is operable by the media-separating element. In order to prevent, especially at low temperatures and high viscosity of the pressure fluid, damage of the media-separating element caused by a high differential pressure, a device is provided between the media-separating element and the bottom valve.

Abstract: The present invention relates to a hydraulic unit for an automotive vehicle brake system according to the recirculation principle, wherein each brake system in the area of the hydraulic unit includes a prefilling location which opens into the pump suction conduit to take up brake fluid. Thus, filling of the hydraulic unit can be simplified by prefilling of the secondary circuit in the vehicle.

Abstract: The present invention relates to a process of bleeding and filling a slip-controlled hydraulic dual-circuit brake system for automotive vehicles which includes pressure modulation valves and at least one pump, a bleeding device and a filling device, and the bleeding device is connected to at least one bleeder valve of a wheel brake and the filling device is arranged on the braking pressure generator. Bleeding of the wheel brakes is executed in two sequences of operation: in a first sequence of operation, the wheel brakes of the front axle and the rear axle are pre-bled by a cyclic actuation of the braking pressure generator, and in the second sequence of operation the main bleeding and filling of the front-wheel and rear-wheel brakes is executed by actuating cycles of the braking pressure generator, the pressure modulation valves and start of operation of the pump.

Abstract: The present invention relates to a method of bubble-free filling of brake fluid into a hydraulic automotive vehicle brake system, which is equipped with slip control and/or automatic braking intervention, the pump of which, under operating conditions, delivers brake fluid from the secondary circuit into the primary circuit according to the return delivery principle. In this arrangement, exclusively the primary circuit is bled and filled with undersaturated brake fluid.