Abstract:
An electronic brake system for a vehicle which has control modules for adjusting the braking force at the wheels of the vehicle, a control module which determines at least the driver's braking command, and at least one communications system which connects the modules to each other, where, to supply the elements with energy, at least two independent vehicle electrical systems (E.sub.1, E.sub.2) are provided, at least one of the elements being connected to an electrical system different from that to which the other elements are connected.
Abstract:
A brake system for a vehicle having a sensor device for providing a first and second sensor signal, a first and a second brake control device, which are directly connected to the sensor device and to provide a corresponding control signal for the first and/or second sensor signal, and a first and a second signal line for transmitting the control signal, the first signal line directly connecting the first brake control device to a first and second wheel actuator device and the second signal line directly connecting the second brake control device to a third and fourth wheel actuator device, the four wheel actuator devices exerting a braking torque corresponding to the control signal on the associated wheel, and the first wheel actuator device being directly connected to the second brake control device and/or the sensor device. A method for operating a brake system for a vehicle is also provided.
Abstract:
A method for setting the clamping force acting on a wheel brake, a part of the clamping force being provided using an electromechanical brake device and simultaneously another part of the clamping force being provided using a hydraulic brake device. During an application procedure, the power consumption of the electric motor-driven brake device is regulated to an essentially constant value in an operating phase (phase 4), in which both brake devices simultaneously exert force, so as to set the clamping force of the parking brake very precisely.
Abstract:
A method of mutual monitoring of components of a distributed computer system for a safety-relevant application in a motor vehicle in particular. The components are interconnected by at least one communication system. To make the mutual monitoring of components as simple and comprehensible as possible and to save on additional hardware components for monitoring, in a plurality of components of the computer system an internal monitoring function which detects faults in the monitored component and a mutual monitoring function which performs a mutual check on results determined by the components and makes a majority selection from the results are implemented, and both the result of the internal monitoring function and the results of the mutual monitoring functions are taken into account in a decision as to whether there is a fault in a component.
Abstract:
A method for steering a vehicle and a steering system are provided, in which a variable torque support of the driver's steering wish and intervention in the position of the steered wheels triggered by a driving dynamics regulator are implementable without mutually interfering with one another. In addition, further additional functions, such as the lane guidance system of the vehicle, may be integrated into a steering system easily and either with or without compensation of the steering feel at the steering wheel.
Abstract:
A process and device for an open-loop control and a closed loop control of the brake system of a vehicle, wherein brake pedal actuation is measured by at least two, preferably diversitary, measuring devices, and the driver's braking command is independently obtained and further processed from at least two actuation signals. A third measuring device, measuring brake pedal actuation, is provided for locating errors. The control device effecting the open-loop control and the closed-loop control of the brake system comprises at least two microcomputers with the signals of the at least two measuring devices being supplied to both, while the signal of the monitoring device is only supplied to one microcomputer.
Abstract:
A method for providing the clamping force generated by an electric brake motor in a parking brake, the clamping force being determined as a function of the motor constants of the brake motor based on instantaneous measured values of the motor current and the motor voltage.
Abstract:
A device for controlling a steer-by-wire steering system in a vehicle, in which redundantly generated sensor signals for regulating a steering motor and for a feedback actuator that transfers the restoring torques from the road to the driver via the steering wheel are received by a control device and plausibility checks of the sensor signals are performed therein and in an operatively associated monitoring module. Microcomputer module and monitoring module monitor each other reciprocally. An auxiliary level for the SbW steering system is monitored by the control device which, in the case of error, switches to this auxiliary level or a mechanical auxiliary level. To further increase safety, the steering wheel motor is triggered via control signals for its phase currents and by a steering wheel motor enable signal, and the steering motor is triggered via control signals for its phase currents and via a steering motor enable signal.
Abstract:
A steer-by-wire steering system comprised of an electronically regulated steering positioner mounted to the steering gear of the front axle or to both front wheels of a vehicle together with an electronic steering regulator and a feedback actuator. A sensor senses the driver's selected direction from the steering wheel. Road feedback can be relayed to the driver through a feedback actuator via the steering wheel. The loss of road feel caused by the absence of the steering column, which normally strongly influences the driver's directional wish, is recreated by the feedback actuator.
Abstract:
A method for setting the clamping force acting on a wheel brake, a part of the clamping force being provided using an electromechanical brake device and simultaneously another part of the clamping force being provided using a hydraulic brake device. During an application procedure, the power consumption of the electric motor-driven brake device is regulated to an essentially constant value in an operating phase (phase 4), in which both brake devices simultaneously exert force, so as to set the clamping force of the parking brake very precisely.