US 12,246,568 B2
Method for controlling a hydraulic actuator of an active chassis
Thomas Witte, Heimerdingen (DE); and Jochen Liebold, Stuttgart (DE)
Assigned to Dr. Ing. h.c. F. Porsche Aktiengesellschaft, (DE)
Filed by Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Stuttgart (DE)
Filed on Apr. 11, 2024, as Appl. No. 18/632,551.
Claims priority of application No. 102023115398.6 (DE), filed on Jun. 13, 2023.
Prior Publication US 2024/0416702 A1, Dec. 19, 2024
Int. Cl. B60G 17/015 (2006.01)
CPC B60G 17/0152 (2013.01) [B60G 2202/413 (2013.01); B60G 2400/5182 (2013.01); B60G 2500/104 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of controlling a hydraulic actuator of an active spring damper element in a vehicle for damping relative movement between a vehicle structure and a wheel suspension, wherein a hydraulic arrangement comprising a hydraulic pump and at least one control valve is arranged to control the hydraulic actuator, the method comprising the steps of:
either predicting or detecting a relative movement between the vehicle structure and wheel suspension,
determining a force to be applied by the hydraulic pump and the at least one control valve of the hydraulic actuator based on the predicted or detected relative movement,
determining a volume flow to be delivered into a first chamber of the hydraulic actuator by the hydraulic pump, said determined volume flow being based on the predicted or detected relative movement,
determining a speed of the hydraulic pump to achieve the determined force and the determined volume flow, and
applying said determined force by (i) adjusting an opening setting of the at least one control valve, which causes a pressure drop in a second chamber of the hydraulic actuator that is fluidly connected to the at least one control valve, and (ii) operating the hydraulic pump at said determined speed to deliver said determined volume flow into the first chamber of the hydraulic actuator.