摘要:
Embodiments herein relate to a vehicle yaw stability control method as well as a vehicle yaw stability control apparatus (1). The yaw rate ψ̇ of the vehicle is measured. A first reference yaw rate ψ̇ ref is set. A difference yaw rate Δ ψ̇ is set. Stabilizing braking intervention is triggered when a value of the difference yaw rate Δ ψ̇ exceeds limits defined by difference yaw rate threshold values Δ ψ̇ min , Δ ψ̇ max . Information regarding the shape of the road ahead of the vehicle is acquired. The reliability of the driver steering input δ is evaluated upon stabilizing braking intervention being triggered. In case the driver steering input δ is deemed unreliable a replacement reference yaw rate ψ ˙ ref road is set based on the acquired road shape and a replacement difference yaw rate Δ ψ̇ road is set whereupon stabilizing braking intervention is performed based on the replacement difference yaw rate Δ ψ̇ road .
摘要:
In a pendular motion determination unit (100) of a motion stabilizer (SA) for a tractor (TR), a parameter computation unit (120) computes a determination parameter PA indicative of a quantity of change in an actual yaw rate Y, a threshold value setting unit (140) computes a threshold value PAth for the parameter PA, and a determination unit (150) determines that a pendular motion caused by swaying motion of a trailer (TL) is imparted, if the parameter PA is greater than the threshold value PAth. Based upon at least one of a value related to the actual yaw rate Y and a value related to the standard yaw rate Ys, an evaluation value computation unit (130) computes a steering-back maneuver evaluation value TS (indicative of a possibility of making periodical steering-back maneuvers), based upon which at least one of the threshold value PAth and the parameter PA is changed.
摘要:
A vehicle stability system for a vehicle. In an embodiment the vehicle stability system includes a yaw rate sensor, an acceleration sensor, a steering sensor, a torque request sensor, and a controller. The controller is configured to receive an output of the yaw rate sensor, the lateral acceleration sensor, the steering sensor, and the torque request sensor, generate a torque signal and a braking signal, and transmit the torque signal to a differential in addition to transmitting the braking signal to a braking system.
摘要:
A vehicle turning behavior control apparatus comprises a controlling section which limits a turning behavior of a vehicle caused by a steering operation, to a limit behavior corresponding to an actual steering speed, by a vehicle speed decrease. The controlling section is configured to determine a modified steering speed in accordance with the actual steering speed, and to determine the limit behavior in accordance with the modified steering speed. The controlling section is further configured to make the modified steering speed higher than the actual steering speed when the actual steering speed decreases during a turning steering for increasing a steering amount. For example, the actual steering speed is used directly as the modified steering speed while the actual steering speed during the turning steering is increasing. While the actual steering speed during the turning steering is decreasing, the modified steering speed higher than the actual steering speed is used.
摘要:
Die Erfindung betrifft ein Fahrerassistenzsystem, umfassend ein Steuergerät, das aus den Signalen von Sensoren einen Schräglaufwinkel (α) von lenkbare Fahrzeugrädern ermittelt oder übermittelt bekommt, wobei das Fahrerassistenzsystem Steuersignale für mindestens eine Brems-Aktuatorik erzeugt, wobei bei Erfassung eines Schräglaufwinkels (α) über die Steuersignale ein Bremseingriff erfolgt, der das Fahrzeug in Richtung des eingeschlagenen Lenkwinkels dreht, sowie ein Verfahren zur Verbesserung des Lenkverhaltens eines Kraftfahrzeuges (1).
摘要:
A vehicle stability system for a vehicle. In an embodiment the vehicle stability system includes a yaw rate sensor, an acceleration sensor, a steering sensor, a torque request sensor, and a controller. The controller is configured to receive an output of the yaw rate sensor, the lateral acceleration sensor, the steering sensor, and the torque request sensor, generate a torque signal and a braking signal, and transmit the torque signal to a differential in addition to transmitting the braking signal to a braking system.
摘要:
The invention relates to a method for preventing the rollover of a motor vehicle in the lateral direction. According to said method, a finite number of pre-defined driving states is determined. It is then determined in which of the pre-defined driving states the vehicle can be currently found, the determined pre-defined driving state being dependent on sensor signals and on the pre-defined driving state in which the vehicle was found. At least one braking operation is carried out in order to prevent the rollover, according to the current pre-defined driving state.
摘要:
The estimating method for a road friction coefficient µ includes the steps of detecting a steering angle by a steering angle sensor; detecting a lateral acceleration by a lateral acceleration sensor; and calculating an approximate friction coefficient µ by referring to a road friction coefficient µ determination table where a plurality of regions each composed of steering angle and lateral acceleration are defined so as to respectively correspond to a plurality of road friction coefficients µi (i = 1 to n, n is an integer not less than 2) on the basis of a boundary line derived from lower limits of the lateral acceleration over various values of the steering angle, and by specifying one of said regions according to the steering angle detected by said steering angle sensor and the lateral acceleration detected by said lateral acceleration sensor to thereby specify one of said road friction coefficients µi as said approximate friction coefficient µ.