Continental Teves, Ag and Company Ohg

Tobias Scheller

Ralph Gronau

Andreas Neu

Ralf Richard Reviol

Michael Hitzel

J&uuml;rgen Woywod

Faouzi Attallah

Michael Jung

Daniel Kosshof

Tom Robert

Ansgar Hoffmann

Ralf Revoil

Ulfilas Hoffmann

A method for operating a brake system, wherein two switching valves arranged on the suction side of pumps are opened and closed in an alternating manner in order to reduce current consumption.

Method for operating a brake system

A method for operating a dual-circuit hydraulic brake system of a vehicle having an ABS function to feed back pressure medium from low-pressure reservoirs. When there is an autonomous pressure buildup request to increase brake pressure and an ABS control system is simultaneously activated, the following steps are carried out: monitoring the filling degree of the low-pressure reservoirs; emptying the low-pressure reservoir whose filling first reaches a defined threshold value; and if, during the execution of the low-pressure reservoir emptying process at the one low-pressure reservoir, the filling of the other low-pressure reservoir reaches the threshold value and the degree of emptying of the one low-pressure reservoir undershoots a defined threshold value, or the filling of the other low-pressure reservoir exceeds the threshold value by k/100, interrupting the low-pressure reservoir emptying process at the one low-pressure reservoir, and carrying out a low-pressure reservoir emptying process at the other low-pressure reservoir.

Method for operating a vehicle brake system

A method for the calibration or diagnosis of a motor vehicle brake system having a cyclically operated pump. At least one parameter (U), representing the electromotor force of the reference pump, is repeatedly ascertained during operation of a reference pump under defined guidelines. A statistical characteristic variable (U) is derived from the values of parameter (U) ascertained for the reference pump. Parameter (U) is ascertained under a corresponding guideline during operation of an operating pump. Corresponding statistical characteristic variable (U) is derived from the values of parameter (U) ascertained for the operating pump. At least one ratio number is calculated as a measure of the deviation of the operating behavior of the operating pump from the operating behavior of the reference pump from the characteristic variable (U) calculated for the reference pump and the characteristic variable (U) calculated for the operating pump.

Method and device for the calibration or diagnosis of a motor vehicle brake system having a cyclically operated pump

In a method for controlling the pressure buildup in an electronically controllable brake system, preferably for use in motor vehicles, including a master brake cylinder, in particular a tandem master brake cylinder (TMC), a vacuum brake booster (booster), at least one additional pressure source for brake force assistance, preferably a hydraulic pump which is drivable by a controlling unit and the pressure of which can be applied to wheel brakes of the vehicle, an approach of a point where the auxiliary-force to actuating-force ratio (operating point) of the vacuum brake booster (booster) falls below a predetermined ratio is detected, that a pressure gradient in the master brake cylinder (TMC pressure gradient) is detected, and that in the event of a detected approach of the operating point of the booster and when a pressure gradient limit value of the detected TMC pressure gradient is exceeded, the additional pressure source is activated for brake force assistance, for the purpose of building up additional brake pressure.

Method for controlling the pressure buildup in an electronically controllable brake system

In a method for determining or calibrating the brake control characteristic of a vacuum brake booster of a vehicle brake system, the pressure in the working chamber or the pressure difference between the working chamber and the vacuum chamber of the vacuum brake booster is determined, and either the brake control characteristic is determined on the basis of the determined pressure or pressure difference of the vacuum brake booster, or the stored brake control characteristic is changed according to the determined pressure or pressure difference.

Method for determining or calibrating the brake control characteristic of a vacuum brake booster

The present invention relates to a method for regulating a predetermined modifiable brake pressure in the wheel brakes of a brake system, wherein input quantities determining the brake pressure in the individual wheel brakes are evaluated and correcting variables of hydraulic valves are defined in a control and/or data processing system. To obviate the need for additional pressure sensors which register the pressure in the wheel brakes, it is arranged for by the invention that a characteristic curve is stored in the control or data processing system, said curve correlating the valve characteristics of the hydraulic valve with a pressure difference of the hydraulic valve, and the correcting variable of the hydraulic valve is defined according to the characteristic curve.

Method for regulating a predetermined modifiable brake pressure

In a method for improving the operation of a hydraulic vehicle brake system with an active hydraulic brake boost, wherein a pressure fluid volume flow between a master brake cylinder and the wheel brakes of the vehicle is controlled by means of an analog or analogized separating valve, and wherein a hydraulic pressure is determined in the master brake cylinder, an increase of the hydraulic pressure in the master brake cylinder is monitored and/or controlled on the basis of the hydraulic pressure determined in the master brake cylinder in a transition of the separating valve from a closed switch position to an open switch position.

Method for improving the operation of a braking system

A method of brake pressure adjustment in a vehicle brake system equipped with an electric hydraulic pump comprises the following steps: detecting a prevailing brake pressure or determining a nominal pressure, and actuating the pump by degrees according to the detected brake pressure or the nominal pressure. In a method of opening an inlet valve of a hydraulic vehicle brake system, a pressure rise on the inlet side of the inlet valve is generated when the difference between the outlet-side and the inlet-side pressure on the inlet valve exceeds a positive threshold value.

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Hofbieber, Germany

Tobias Scheller