US 12,291,070 B2
Emergency operating method for an active chassis of a motor vehicle
Christoph Lenniger, Renningen (DE)
Assigned to Dr. Ing. h.c. F. Porsche Aktiengesellschaft, (DE)
Filed by Dr. Ing. h.c. F. Porsche Aktiengesellschaft, Stuttgart (DE)
Filed on Jan. 26, 2024, as Appl. No. 18/423,380.
Claims priority of application No. 10 2023 107 419.9 (DE), filed on Mar. 24, 2023.
Prior Publication US 2024/0317010 A1, Sep. 26, 2024
Int. Cl. B60G 17/0185 (2006.01); B60G 17/06 (2006.01)
CPC B60G 17/0185 (2013.01) [B60G 17/06 (2013.01); B60G 2202/416 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An emergency operating method for an active chassis of a motor vehicle, wherein the active chassis comprises at least the following components:
(i) a control device for controlling the active chassis;
(ii) at least one damper device with a hydraulic cylinder and a hydraulic piston pressure-loaded on both sides by a hydraulic fluid;
(iii) a pump driven by an electric drive machine, which is operated at a voltage, for generating a changeable pressure above the hydraulic piston;
(iv) a hydraulic pressure accumulator for providing an operating pressure for the at least one damper device; and
(v) for the at least one damper device, respectively at least one control valve for controlling a differential pressure across the hydraulic piston,
wherein the emergency operating method is performed by the control device and comprises at least the following steps in the order given:
a. detect a termination of an electrical supply of the electric drive machine of the pump;
b. short-circuit the electric drive machine; and
c. disconnect the voltage supply of the electric drive machine.