US 12,220,960 B2
Method for adapting a transfer function of an active suspension of a vehicle
Thomas Smits, Straelen (DE)
Assigned to Continental Automotive GmbH, Hannover (DE)
Appl. No. 17/309,826
Filed by Continental Automotive GmbH, Hannover (DE)
PCT Filed Dec. 3, 2019, PCT No. PCT/EP2019/083507
§ 371(c)(1), (2) Date Jun. 21, 2021,
PCT Pub. No. WO2020/126480, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 10 2018 222 762.4 (DE), filed on Dec. 21, 2018.
Prior Publication US 2022/0072924 A1, Mar. 10, 2022
Int. Cl. B60G 17/0165 (2006.01)
CPC B60G 17/0165 (2013.01) [B60G 2600/0422 (2013.01); B60G 2800/702 (2013.01); B60G 2800/87 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for adapting a transfer function of an active suspension of a vehicle, comprising:
storing a surface profile of a section of road along which the vehicle drives in a control unit of the vehicle, wherein the surface profile is generated by the control unit of the vehicle on the basis of a shock absorber position, a tire deformation and recorded values of a sensor device set up to record uneven surfaces of the section of road, wherein the surface profile comprises an x-y-z coordinate system, wherein the x-y-z coordinate system defines an x-y plane wherein the distance between two uneven surfaces in the x-direction and y-direction synchronize the current geographical position of unevenness;
activating the active suspension by the control unit according to a predetermined transfer function for adaptation to the surface profile with adjustment values to compensate for unevenness of the surface profile, wherein the surface profile, a current geographical position of the vehicle, a current speed, respective alignment of the wheels and a weight of the vehicle are provided as input variables for the predetermined transfer function, and wherein the adjustment values comprise a damping factor and valve settings of shock absorbers;
recording vertical accelerations while driving along the section of road with at least one of a shock absorber sensor system and a tire sensor system;
transferring the recorded vertical accelerations to the control unit;
transferring the adjustment values and the recorded vertical accelerations from the vehicle to an external central computer;
calculating the adjustment values for the section of road by the external central computer according to the predetermined transfer function; and
transferring the adjustment values to the control unit for activating the active suspension.