Abstract:
In a method for setting a limit value of a vehicle state variable in a driver assistance system, in particular in an electronic stability program ESP, accelerations (ax, ay) are measured by the airbag sensor arrangement and, in the event of an accident of low to medium severity, are used to determine limit values of the yaw acceleration and of the yaw rate. Said limit values are used for monitoring the functionality of the yaw rate sensor.
Abstract:
The invention relates to a method for generating signals for influencing the movement of the body of a vehicle, the chain of movements of which can be controlled or adjusted. According to the invention, the movement of the vehicle body is determined by sensors, the sensor signals that correspond to the determined sensor values are fed to a shock absorber controller and said controller delivers at least one control signal to control actuators, in particular semi-active or active shock absorbers which are used to influence the movement of the vehicle body. The shock absorber controller uses the sensor signals to influence a shifting, rolling or pitching movement of the vehicle body about a point on said vehicle body, the shock absorber controller defining the point variably in conjunction with the movement of the vehicle body.
Abstract:
The absolute roll angle of a vehicle body (16) is estimated by blending two preliminary roll angle estimates based on their frequency (48) so that the blended estimate continuously favors the more accurate of the preliminary roll angle estimates. A first preliminary roll angle estimate based on the measured roll rate (22) is improved by initially compensating the roll rate signal for bias error using roll rate estimates inferred from other measured parameters (44). And a second preliminary roll angle estimate is determined based on the kinematic relationship among roll angle, lateral acceleration, yaw rate and vehicle speed (46). The blended estimate of roll angle utilizes a blending coefficient that varies with the frequency of the preliminary roll angle signals, and a blending factor used in the blending coefficient is set to different values depending whether the vehicle (10) is in a steady-state or transient condition (48).
Abstract:
Improved methods of controlling the stability of a vehicle are provided via the cooperative operation of vehicle stability control systems such as an Active Yaw Control system, Antilock Braking System, and Traction Control System. These methods use recognition of road surface information including the road friction coefficient (mu), wheel slippage, and yaw deviations. The methods then modify the settings of the active damping system and/or the distribution of drive torque, as necessary, to increase/reduce damping in the suspension and shift torque application at the wheels, thus preventing a significant shift of load in the vehicle and/or improving vehicle drivability and comfort. The adjustments of the active damping system or torque distribution temporarily override any characteristics that were pre-selected by the driver.
Abstract:
[PROBLEM] A turning performance of a vehicle is improved. [SOLUTION] When a vehicle turns, a body 10 and a left and a right wheel 14, 16 are inclined inward of a turning circle. Consequently forces are exerted to an operator in an up-down direction, which leads to reducing discomfort felt by the operator. In addition, since a gravity center of the vehicle is moved inward of the turning circle, a turning stability of the vehicle is improved.
Abstract:
The invention relates to a method for controlling the locking degree of an electronically controllable differential lock in a driven axle of a vehicle. The inventive method is characterised in that it checks whether a driving wheel on the driven axle is braked in a controlled manner by means of a driving dynamics regulator, and a zero locking degree in the differential lock is set, if it is established that a driving wheel on the driven axle is braked in a controlled manner by means of the driving dynamics regulator. Advantageously, if the vehicle is oversteered without any braking intervention by the driving dynamics regulator, a locking degree different to zero is generated. The invention also relates to a device for carrying out the method.
Abstract:
A method of controlling an advanced chassis control system of a vehicle such as an anti-lock brake system, traction control system, vehicle stability control system, or roll control system affecting the vehicle dynamic performance and safety is disclosed. A control unit controls the operation of the advanced chassis control system based at least in part upon predictions of force generating characteristics of tires of the vehicle and driver input signals. The advanced chassis control system of the vehicle is controlled in one manner the tire is determined to be inflated, controlled in another, different manner if the tire id determined to be deflated. During normal driving, the chassis control systems can operate to control the vehicle according to the desire of the driver vehicle accounting for at least one tire being deflated. During braking the controller can act to distribute braking forces in order to divert forces from the deflated tire to the inflated tires.
Abstract:
Fahrerassistenzsystem für Kraftfahrzeuge, mit einer Erkennungseinrichtung für Spurwechsel des eigenen Fahrzeugs, dadurch gekennzeichnet, daß die Erkennungseinrichtung dazu ausgebildet ist, ein für die Gierbewegung des Fahrzeugs repräsentatives Gierratensignal (dψ/dt) zu überwachen und einen Spurwechsel daran zu erkennen daß das Gierratensignal nach einer Richtung von einem Referenzwert (R) abweicht und danach innerhalb einer begrenzten Zeitspanne (T) zu dem Referenzwert zurückkehrt und mit einer Änderungsrate, die größer als ein bestimmter Schwellenwert ist, zur anderen Seite des Referenzwertes durchschwingt.
Abstract:
A method of controlling an advanced chassis control system of a vehicle such as an anti-lock brake system, traction control system, vehicle stability control system, or roll control system affecting the vehicle dynamic performance and safety is disclosed. A control unit controls the operation of the advanced chassis control system based at least in part upon predictions of force generating characteristics of tires of the vehicle and driver input signals. The advanced chassis control system of the vehicle is controlled in one manner the tire is determined to be inflated, controlled in another, different manner if the tire id determined to be deflated. During normal driving, the chassis control systems can operate to control the vehicle according to the desire of the driver vehicle accounting for at least one tire being deflated. During braking the controller can act to distribute braking forces in order to divert forces from the deflated tire to the inflated tires.