Abstract: A method and a device for controlling and/or regulating an electric motor. Such electric motors are used for example in motor vehicles in the form of pump motors. In general, the electric motor is supplied with electrical energy from a battery and/or using a generator. The controlling and regulation take place using a high-frequency pulse width modulation (PWM). When the electric motor is started, the PWM is used to continuously increase the motor current required for the operation of the electric motor, e.g. beginning from 0.

Abstract: A device for controlling the brake pressure in a hydraulic brake system with the aid of a pressure-limiting valve that limits the brake pressure to a predefined threshold value, and to that end is driven by an electronic device in accordance with a valve characteristic curve. The setting accuracy can be improved considerably if an estimating unit for estimating the brake pressure, a sensor system for measuring the brake pressure, a unit for determining a pressure difference between the measured brake pressure and the estimated brake pressure, as well as a controller unit which drives the pressure-limiting valve as a function of the pressure difference are provided.

Abstract: A method for determining the rotary speed of an electrical machine, especially of a direct current motor, which is controlled in PWM operation, the tracking voltage of the electrical machine being measured and the rotary speed being ascertained from that. The rotary speed fluctuations are able to be substantially reduced if the electrical machine is controlled using a control signal which has a PWM phase, in which the electrical machine is periodically switched on and off using a prespecified pulse duty factor, and which has a measuring phase in which the electrical machine is switched off. The rotary speed is measured in the measuring phases, in this instance, and is calculated in the PWM phases based on a model.

Abstract: A method for determining the rotary speed of an electrical machine, especially of a direct current motor, which is controlled in PWM operation, the tracking voltage of the electrical machine being measured and the rotary speed being ascertained from that. The rotary speed fluctuations are able to be substantially reduced if the electrical machine is controlled using a control signal which has a PWM phase, in which the electrical machine is periodically switched on and off using a prespecified pulse duty factor, and which has a measuring phase in which the electrical machine is switched off. The rotary speed is measured in the measuring phases, in this instance, and is calculated in the PWM phases based on a model.

Abstract: A method and a device for controlling at least one valve, in response to a detected leak in the system including the valve. An activation signal is generated which opens the valve briefly for flushing purposes and closes it again, or moves the valve ball at great speed onto the valve seat.

Abstract: A method and a device for controlling at least one valve, in response to a detected leak in the system including the valve. An activation signal is generated which opens the valve briefly for flushing purposes and closes it again, or moves the valve ball at great speed onto the valve seat.

Abstract: A method and a device for evaluating a sensor signal. A value for the residual braking torque of the brake and/or a detection of a blockage of the wheel brake is derived as a function of this signal in the unbraked state.

Abstract: The invention relates to a wheel brake apparatus having an electric motor, a rotation/translation conversion mechanism that can be driven to rotate by the electric motor, a hydraulic working piston that can be moved by the rotation/translation conversion mechanism, and a brake lining piston that can be hydraulically moved by the working piston. In order to permit an emergency actuation of the wheel brake apparatus in the event of a leak in the hydraulics, the invention proposes embodying the wheel brake apparatus so that the brake lining piston can also be mechanically moved by the working piston. This can be achieved by virtue of the fact that the two pistons are disposed coaxially.

Abstract: A method and a device for evaluating a sensor signal. A value for the residual braking torque of the brake and/or a detection of a blockage of the wheel brake is derived as a function of this signal in the unbraked state.

Abstract: The invention describes an apparatus and method for determining at least one wheel slip of a vehicle and at least one of a pitch angle, a road angle, a roll angle for use in at least one vehicle control system. The method and apparatus are characterized in that at least three deflection displacements are determined, and then at least one wheel slip of the vehicle and at least one of the pitch angle, the road angle, the roll angle of the vehicle are determined based on the at least three deflection displacements. The wheel slip(s) of the vehicle and at least one of the pitch angle, the road angle, and the roll angle of the vehicle may be provided or otherwise made available to the at least one vehicle control system.

Abstract: The invention relates to a wheel brake apparatus having an electric motor, a rotation/translation conversion mechanism that can be driven to rotate by the electric motor, a hydraulic working piston that can be moved by the rotation/translation conversion mechanism, and a brake lining piston that can be hydraulically moved by the working piston. In order to permit an emergency actuation of the wheel brake apparatus in the event of a leak in the hydraulics, the invention proposes embodying the wheel brake apparatus so that the brake lining piston can also be mechanically moved by the working piston. This can be achieved by virtue of the fact that the two pistons are disposed coaxially.

Abstract: The invention describes an apparatus and method for determining at least one wheel slip of a vehicle and at least one of a pitch angle, a road angle, a roll angle for use in at least one vehicle control system. The method and apparatus are characterized in that at least three deflection displacements are determined, and then at least one wheel slip of the vehicle and at least one of the pitch angle, the road angle, the roll angle of the vehicle are determined based on the at least three deflection displacements. The wheel slip(s) of the vehicle and at least one of the pitch angle, the road angle, and the roll angle of the vehicle may be provided or otherwise made available to the at least one vehicle control system.

Abstract: A method and a device for controlling a vehicle braking system in open loop, having electrically operable control devices at the wheel brakes. The control device is controlled according to a driver's braking input, in at least one operating state, on the basis of the correlation, adjusted by an estimate method, between a variable representing the path of the brake pad, and the braking torque or the braking force at the wheel, and/or on the basis of the zero value of this variable, ascertained by an estimate method, when the brake pads lift off from the disc or drum.