Method for influencing the transverse dynamics of a vehicle

#This application is a national stage of PCT International Application No. PCT/EP2009/000503, filed Jan. 27, 2009, which claims priority under 35 U.S.C. §119 to German Patent Application No. 10 2008 017 950.7, filed Apr. 9, 2008, the entire disclosure of which is herein expressly incorporated by reference.

#The invention relates to a method for influencing the transverse dynamics of a vehicle.

#German patent document DE 102 36 331 A1 discloses a generic method for operating a vehicle steering system which can generate a steering angle by means of an actuator, for compensating a disturbance yaw moment independently of a steering angle preset by the driver of the vehicle with the steering wheel. If the actuator fails, the following steps are carried out after initiating a steering angle that compensates a disturbance yaw moment (which remains with a failed actuator): an actuator yaw moment generated by the actuator is calculated, and a compensating counter-yaw moment is slowly built up by automatic application of a longitudinal wheel force, in order to enable the driver to counteract a steering angle to this yaw moment. Subsequently, the counter-yaw moment is reduced slowly in order to enable the driver to balance the yaw moment occurring due to the steering angle still present by means of a steering angle generated by the steering wheel.

#FIG. 1 is a schematic depiction of a motor vehicle with an arrangement of the device according to the invention; and

#FIG. 2 schematically depicts the temporal course of a transverse dynamics disturbance variable of a first counter-yaw moment and a second counter-yaw moment, according to an embodiment of the method according to the invention.

#FIG. 1 is a schematic depiction of a vehicle with an arrangement of a device 20 for carrying out a method for influencing the transverse dynamics of the vehicle. The vehicle 1—for example a motor vehicle—has four wheels 2.1-2.4, which are respectively in operative connection with an associated wheel brake unit 3.1-3.4. Each of the wheel brake units 3.1-3.4 is formed for braking the wheel 2.1-2.4 of the vehicle 1 respectively associated therewith and can be accessed individually independently of the respective other wheel brake units. Brake forces with different strengths or brake actions can thereby be achieved at the individual wheels 2.1-2.4. A corresponding actuation of one of the wheel brake unit with 2.1-2.4 can thus also be called “wheel brake intervention”. For activating the wheel brake units 3.1-3.4, a brake force activation unit 4 is provided according to the invention, via which the wheel brake units 3.1-3.4 can be accessed or activated and deactivated. The brake force activation device 4 is in a signal-technical connection with a disturbance variable determination device 5 on its part. A number of sensors 6.1-6.n supplies sensor signals SS1-SSn to the disturbance variable determination device 5. The disturbance variable determination device 5 presently has a disturbance variable observer.

#The vehicle 1 has a steering system 10, whose steering wheel 11 is connected to a steering transmission 13 via a steering column 12. The steering transmission converts the rotary movement at the steering wheel 11 or the steering column 12 to a translational movement, which serves for adjusting the steering angle at the steerable wheels 2.3 and 2.4 via a steering link 14. For supporting the driver during steering, a steering moment adjuster 15 is provided, which is for example coupled to the steering column 12 and which alternatively could also be coupled to the steering transmission 13. The steering moment adjuster 15 applies a steering moment m to the steering column 12, which can also be perceived at the steering wheel 11 due to the mechanical connection and serves as servo support for the driver. The steering moment adjuster 15 is also in a signal-technical operative connection with the disturbance variable determination device 5.

#The sensors 6.1-6.n serve for determining one or more actual variables of the vehicle 1, such as a yaw rate, a longitudinal speed, a steering angle, the steering wheel angle, the hand moment at the steering wheel 11 applied by the driver and/or a transverse acceleration. Corresponding sensor signals SS1-SSn are transmitted by the sensors 6.1-6.n to the disturbance determination device 5.