摘要:
In a method and device for identifying a pressure variable, in particular in a brake system, the pressure difference is estimated on the basis of a pressure gradient and the actuation duration of a solenoid valve.
摘要:
An inlet pressure effected by the driver is detected in the brake system, and a driver's wish value formed from this pressure is used as the basis for controlling the brake system. In the formation of the driver's wish value the measured pressure value is corrected according to control parameters including either status information for a return pump and associated values, or flow information such as volume change in the master cylinder.
摘要:
A process and an apparatus are provided for controlling the brake system of a vehicle. A desired value representing the vehicle deceleration is formed depending on a depression signal derived from actuation of the brake pedal by the drive, and additionally depending on the rate of change that signal. The actual vehicle deceleration is compared to the desired value and the vehicle is automatically braked when the actual deceleration deviates from the desired value.
摘要:
A method and/or a device for estimating pressure and/or volume changes in a hydraulic system having two peripheral volume storage vessels connected to a central volume storage vessel, in which, to increase the response rate, the estimate is based at least at times on a model in which a direct connection to the peripheral volume storage vessels is assumed, regardless of whether or not the peripheral volume storage vessels are simultaneously connected directly to each other.
摘要:
A method and device for driving an electromagnetic valve, in particular an electromagnetic valve of a braking system having antilock protection and/or a traction control system. When switched over into the position that permits the passage of flow, the valve is so driven that, in a first phase for a specifiable time (DT), the current falls off in accordance with a first function and remains nearly constant over time in a second phase.
摘要:
When a differential speed determined from the wheel speeds has superimposed thereon a frequency typical of drive train vibrations, a vibration signal is generated. When the vibration signal exceeds a threshold, a torsional moment based on the difference between the engine speed and the differential speed is used to modify activation times of the brake pressure control valves so that the drive train vibrations decay.
摘要:
A method and a device for controlling a brake system of a vehicle, with an automatic braking action being triggered when a threshold value is exceeded. The threshold value is varied as a function of a quantity derived from the distance to an obstacle located in front of the vehicle.
摘要:
A method and a device are proposed for driving a solenoid valve that has stroke ranges of a stable equilibrium of forces and stroke ranges of an unstable equilibrium of forces. For setting the predetermined differential pressure across the solenoid valve, a driving signal quantity is generated which is selected such that the stroke ranges of an unstable equilibrium of forces are avoided or the dwell time of the solenoid valve in these ranges is reduced.
摘要:
A method and a device for determining a pressure variable, in particular in a braking system having a delivery pump. The differential pressure between a first line and a second line is determined using as a baseline a variable which represents a measure for the speed of the delivery pump.
摘要:
An acceleration signal is generated in a motor vehicle having acceleration and deceleration states. The signal generated is used in a vehicle control system. A first value, representing vehicle acceleration, is initially determined as a function of at least one value acquired by a sensor. Furthermore, a second value representing the instantaneous acceleration and deceleration state of the vehicle is determined. The magnitude of the first value determined is limited as a function of the second value determined. Then, the signal representing the vehicle acceleration is generated as a function of the limited first value.